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      2  OpenSSL CHANGES
      3  _______________
      5  Changes between 1.0.1o and 1.0.1p [9 Jul 2015]
      7   *) Alternate chains certificate forgery
      9      During certificate verfification, OpenSSL will attempt to find an
     10      alternative certificate chain if the first attempt to build such a chain
     11      fails. An error in the implementation of this logic can mean that an
     12      attacker could cause certain checks on untrusted certificates to be
     13      bypassed, such as the CA flag, enabling them to use a valid leaf
     14      certificate to act as a CA and "issue" an invalid certificate.
     16      This issue was reported to OpenSSL by Adam Langley/David Benjamin
     17      (Google/BoringSSL).
     18      [Matt Caswell]
     20  Changes between 1.0.1n and 1.0.1o [12 Jun 2015]
     22   *) Fix HMAC ABI incompatibility. The previous version introduced an ABI
     23      incompatibility in the handling of HMAC. The previous ABI has now been
     24      restored.
     26  Changes between 1.0.1m and 1.0.1n [11 Jun 2015]
     28   *) Malformed ECParameters causes infinite loop
     30      When processing an ECParameters structure OpenSSL enters an infinite loop
     31      if the curve specified is over a specially malformed binary polynomial
     32      field.
     34      This can be used to perform denial of service against any
     35      system which processes public keys, certificate requests or
     36      certificates.  This includes TLS clients and TLS servers with
     37      client authentication enabled.
     39      This issue was reported to OpenSSL by Joseph Barr-Pixton.
     40      (CVE-2015-1788)
     41      [Andy Polyakov]
     43   *) Exploitable out-of-bounds read in X509_cmp_time
     45      X509_cmp_time does not properly check the length of the ASN1_TIME
     46      string and can read a few bytes out of bounds. In addition,
     47      X509_cmp_time accepts an arbitrary number of fractional seconds in the
     48      time string.
     50      An attacker can use this to craft malformed certificates and CRLs of
     51      various sizes and potentially cause a segmentation fault, resulting in
     52      a DoS on applications that verify certificates or CRLs. TLS clients
     53      that verify CRLs are affected. TLS clients and servers with client
     54      authentication enabled may be affected if they use custom verification
     55      callbacks.
     57      This issue was reported to OpenSSL by Robert Swiecki (Google), and
     58      independently by Hanno Bck.
     59      (CVE-2015-1789)
     60      [Emilia Ksper]
     62   *) PKCS7 crash with missing EnvelopedContent
     64      The PKCS#7 parsing code does not handle missing inner EncryptedContent
     65      correctly. An attacker can craft malformed ASN.1-encoded PKCS#7 blobs
     66      with missing content and trigger a NULL pointer dereference on parsing.
     68      Applications that decrypt PKCS#7 data or otherwise parse PKCS#7
     69      structures from untrusted sources are affected. OpenSSL clients and
     70      servers are not affected.
     72      This issue was reported to OpenSSL by Michal Zalewski (Google).
     73      (CVE-2015-1790)
     74      [Emilia Ksper]
     76   *) CMS verify infinite loop with unknown hash function
     78      When verifying a signedData message the CMS code can enter an infinite loop
     79      if presented with an unknown hash function OID. This can be used to perform
     80      denial of service against any system which verifies signedData messages using
     81      the CMS code.
     82      This issue was reported to OpenSSL by Johannes Bauer.
     83      (CVE-2015-1792)
     84      [Stephen Henson]
     86   *) Race condition handling NewSessionTicket
     88      If a NewSessionTicket is received by a multi-threaded client when attempting to
     89      reuse a previous ticket then a race condition can occur potentially leading to
     90      a double free of the ticket data.
     91      (CVE-2015-1791)
     92      [Matt Caswell]
     94   *) Reject DH handshakes with parameters shorter than 768 bits.
     95      [Kurt Roeckx and Emilia Kasper]
     97  Changes between 1.0.1l and 1.0.1m [19 Mar 2015]
     99   *) Segmentation fault in ASN1_TYPE_cmp fix
    101      The function ASN1_TYPE_cmp will crash with an invalid read if an attempt is
    102      made to compare ASN.1 boolean types. Since ASN1_TYPE_cmp is used to check
    103      certificate signature algorithm consistency this can be used to crash any
    104      certificate verification operation and exploited in a DoS attack. Any
    105      application which performs certificate verification is vulnerable including
    106      OpenSSL clients and servers which enable client authentication.
    107      (CVE-2015-0286)
    108      [Stephen Henson]
    110   *) ASN.1 structure reuse memory corruption fix
    112      Reusing a structure in ASN.1 parsing may allow an attacker to cause
    113      memory corruption via an invalid write. Such reuse is and has been
    114      strongly discouraged and is believed to be rare.
    116      Applications that parse structures containing CHOICE or ANY DEFINED BY
    117      components may be affected. Certificate parsing (d2i_X509 and related
    118      functions) are however not affected. OpenSSL clients and servers are
    119      not affected.
    120      (CVE-2015-0287)
    121      [Stephen Henson]
    123   *) PKCS7 NULL pointer dereferences fix
    125      The PKCS#7 parsing code does not handle missing outer ContentInfo
    126      correctly. An attacker can craft malformed ASN.1-encoded PKCS#7 blobs with
    127      missing content and trigger a NULL pointer dereference on parsing.
    129      Applications that verify PKCS#7 signatures, decrypt PKCS#7 data or
    130      otherwise parse PKCS#7 structures from untrusted sources are
    131      affected. OpenSSL clients and servers are not affected.
    133      This issue was reported to OpenSSL by Michal Zalewski (Google).
    134      (CVE-2015-0289)
    135      [Emilia Ksper]
    137   *) DoS via reachable assert in SSLv2 servers fix
    139      A malicious client can trigger an OPENSSL_assert (i.e., an abort) in
    140      servers that both support SSLv2 and enable export cipher suites by sending
    141      a specially crafted SSLv2 CLIENT-MASTER-KEY message.
    143      This issue was discovered by Sean Burford (Google) and Emilia Ksper
    144      (OpenSSL development team).
    145      (CVE-2015-0293)
    146      [Emilia Ksper]
    148   *) Use After Free following d2i_ECPrivatekey error fix
    150      A malformed EC private key file consumed via the d2i_ECPrivateKey function
    151      could cause a use after free condition. This, in turn, could cause a double
    152      free in several private key parsing functions (such as d2i_PrivateKey
    153      or EVP_PKCS82PKEY) and could lead to a DoS attack or memory corruption
    154      for applications that receive EC private keys from untrusted
    155      sources. This scenario is considered rare.
    157      This issue was discovered by the BoringSSL project and fixed in their
    158      commit 517073cd4b.
    159      (CVE-2015-0209)
    160      [Matt Caswell]
    162   *) X509_to_X509_REQ NULL pointer deref fix
    164      The function X509_to_X509_REQ will crash with a NULL pointer dereference if
    165      the certificate key is invalid. This function is rarely used in practice.
    167      This issue was discovered by Brian Carpenter.
    168      (CVE-2015-0288)
    169      [Stephen Henson]
    171   *) Removed the export ciphers from the DEFAULT ciphers
    172      [Kurt Roeckx]
    174  Changes between 1.0.1k and 1.0.1l [15 Jan 2015]
    176   *) Build fixes for the Windows and OpenVMS platforms
    177      [Matt Caswell and Richard Levitte]
    179  Changes between 1.0.1j and 1.0.1k [8 Jan 2015]
    181   *) Fix DTLS segmentation fault in dtls1_get_record. A carefully crafted DTLS
    182      message can cause a segmentation fault in OpenSSL due to a NULL pointer
    183      dereference. This could lead to a Denial Of Service attack. Thanks to
    184      Markus Stenberg of Cisco Systems, Inc. for reporting this issue.
    185      (CVE-2014-3571)
    186      [Steve Henson]
    188   *) Fix DTLS memory leak in dtls1_buffer_record. A memory leak can occur in the
    189      dtls1_buffer_record function under certain conditions. In particular this
    190      could occur if an attacker sent repeated DTLS records with the same
    191      sequence number but for the next epoch. The memory leak could be exploited
    192      by an attacker in a Denial of Service attack through memory exhaustion.
    193      Thanks to Chris Mueller for reporting this issue.
    194      (CVE-2015-0206)
    195      [Matt Caswell]
    197   *) Fix issue where no-ssl3 configuration sets method to NULL. When openssl is
    198      built with the no-ssl3 option and a SSL v3 ClientHello is received the ssl
    199      method would be set to NULL which could later result in a NULL pointer
    200      dereference. Thanks to Frank Schmirler for reporting this issue.
    201      (CVE-2014-3569)
    202      [Kurt Roeckx]
    204   *) Abort handshake if server key exchange message is omitted for ephemeral
    205      ECDH ciphersuites.
    207      Thanks to Karthikeyan Bhargavan of the PROSECCO team at INRIA for
    208      reporting this issue.
    209      (CVE-2014-3572)
    210      [Steve Henson]
    212   *) Remove non-export ephemeral RSA code on client and server. This code
    213      violated the TLS standard by allowing the use of temporary RSA keys in
    214      non-export ciphersuites and could be used by a server to effectively
    215      downgrade the RSA key length used to a value smaller than the server
    216      certificate. Thanks for Karthikeyan Bhargavan of the PROSECCO team at
    217      INRIA or reporting this issue.
    218      (CVE-2015-0204)
    219      [Steve Henson]
    221   *) Fixed issue where DH client certificates are accepted without verification.
    222      An OpenSSL server will accept a DH certificate for client authentication
    223      without the certificate verify message. This effectively allows a client to
    224      authenticate without the use of a private key. This only affects servers
    225      which trust a client certificate authority which issues certificates
    226      containing DH keys: these are extremely rare and hardly ever encountered.
    227      Thanks for Karthikeyan Bhargavan of the PROSECCO team at INRIA or reporting
    228      this issue.
    229      (CVE-2015-0205)
    230      [Steve Henson]
    232   *) Ensure that the session ID context of an SSL is updated when its
    233      SSL_CTX is updated via SSL_set_SSL_CTX.
    235      The session ID context is typically set from the parent SSL_CTX,
    236      and can vary with the CTX.
    237      [Adam Langley]
    239   *) Fix various certificate fingerprint issues.
    241      By using non-DER or invalid encodings outside the signed portion of a
    242      certificate the fingerprint can be changed without breaking the signature.
    243      Although no details of the signed portion of the certificate can be changed
    244      this can cause problems with some applications: e.g. those using the
    245      certificate fingerprint for blacklists.
    247      1. Reject signatures with non zero unused bits.
    249      If the BIT STRING containing the signature has non zero unused bits reject
    250      the signature. All current signature algorithms require zero unused bits.
    252      2. Check certificate algorithm consistency.
    254      Check the AlgorithmIdentifier inside TBS matches the one in the
    255      certificate signature. NB: this will result in signature failure
    256      errors for some broken certificates.
    258      Thanks to Konrad Kraszewski from Google for reporting this issue.
    260      3. Check DSA/ECDSA signatures use DER.
    262      Reencode DSA/ECDSA signatures and compare with the original received
    263      signature. Return an error if there is a mismatch.
    265      This will reject various cases including garbage after signature
    266      (thanks to Antti Karjalainen and Tuomo Untinen from the Codenomicon CROSS
    267      program for discovering this case) and use of BER or invalid ASN.1 INTEGERs
    268      (negative or with leading zeroes).
    270      Further analysis was conducted and fixes were developed by Stephen Henson
    271      of the OpenSSL core team.
    273      (CVE-2014-8275)
    274      [Steve Henson]
    276    *) Correct Bignum squaring. Bignum squaring (BN_sqr) may produce incorrect
    277       results on some platforms, including x86_64. This bug occurs at random
    278       with a very low probability, and is not known to be exploitable in any
    279       way, though its exact impact is difficult to determine. Thanks to Pieter
    280       Wuille (Blockstream) who reported this issue and also suggested an initial
    281       fix. Further analysis was conducted by the OpenSSL development team and
    282       Adam Langley of Google. The final fix was developed by Andy Polyakov of
    283       the OpenSSL core team.
    284       (CVE-2014-3570)
    285       [Andy Polyakov]
    287    *) Do not resume sessions on the server if the negotiated protocol
    288       version does not match the session's version. Resuming with a different
    289       version, while not strictly forbidden by the RFC, is of questionable
    290       sanity and breaks all known clients.
    291       [David Benjamin, Emilia Ksper]
    293    *) Tighten handling of the ChangeCipherSpec (CCS) message: reject
    294       early CCS messages during renegotiation. (Note that because
    295       renegotiation is encrypted, this early CCS was not exploitable.)
    296       [Emilia Ksper]
    298    *) Tighten client-side session ticket handling during renegotiation:
    299       ensure that the client only accepts a session ticket if the server sends
    300       the extension anew in the ServerHello. Previously, a TLS client would
    301       reuse the old extension state and thus accept a session ticket if one was
    302       announced in the initial ServerHello.
    304       Similarly, ensure that the client requires a session ticket if one
    305       was advertised in the ServerHello. Previously, a TLS client would
    306       ignore a missing NewSessionTicket message.
    307       [Emilia Ksper]
    309  Changes between 1.0.1i and 1.0.1j [15 Oct 2014]
    311   *) SRTP Memory Leak.
    313      A flaw in the DTLS SRTP extension parsing code allows an attacker, who
    314      sends a carefully crafted handshake message, to cause OpenSSL to fail
    315      to free up to 64k of memory causing a memory leak. This could be
    316      exploited in a Denial Of Service attack. This issue affects OpenSSL
    317      1.0.1 server implementations for both SSL/TLS and DTLS regardless of
    318      whether SRTP is used or configured. Implementations of OpenSSL that
    319      have been compiled with OPENSSL_NO_SRTP defined are not affected.
    321      The fix was developed by the OpenSSL team.
    322      (CVE-2014-3513)
    323      [OpenSSL team]
    325   *) Session Ticket Memory Leak.
    327      When an OpenSSL SSL/TLS/DTLS server receives a session ticket the
    328      integrity of that ticket is first verified. In the event of a session
    329      ticket integrity check failing, OpenSSL will fail to free memory
    330      causing a memory leak. By sending a large number of invalid session
    331      tickets an attacker could exploit this issue in a Denial Of Service
    332      attack.
    333      (CVE-2014-3567)
    334      [Steve Henson]
    336   *) Build option no-ssl3 is incomplete.
    338      When OpenSSL is configured with "no-ssl3" as a build option, servers
    339      could accept and complete a SSL 3.0 handshake, and clients could be
    340      configured to send them.
    341      (CVE-2014-3568)
    342      [Akamai and the OpenSSL team]
    344   *) Add support for TLS_FALLBACK_SCSV.
    345      Client applications doing fallback retries should call
    346      SSL_set_mode(s, SSL_MODE_SEND_FALLBACK_SCSV).
    347      (CVE-2014-3566)
    348      [Adam Langley, Bodo Moeller]
    350   *) Add additional DigestInfo checks.
    352      Reencode DigestInto in DER and check against the original when
    353      verifying RSA signature: this will reject any improperly encoded
    354      DigestInfo structures.
    356      Note: this is a precautionary measure and no attacks are currently known.
    358      [Steve Henson]
    360  Changes between 1.0.1h and 1.0.1i [6 Aug 2014]
    362   *) Fix SRP buffer overrun vulnerability. Invalid parameters passed to the
    363      SRP code can be overrun an internal buffer. Add sanity check that
    364      g, A, B < N to SRP code.
    366      Thanks to Sean Devlin and Watson Ladd of Cryptography Services, NCC
    367      Group for discovering this issue.
    368      (CVE-2014-3512)
    369      [Steve Henson]
    371   *) A flaw in the OpenSSL SSL/TLS server code causes the server to negotiate
    372      TLS 1.0 instead of higher protocol versions when the ClientHello message
    373      is badly fragmented. This allows a man-in-the-middle attacker to force a
    374      downgrade to TLS 1.0 even if both the server and the client support a
    375      higher protocol version, by modifying the client's TLS records.
    377      Thanks to David Benjamin and Adam Langley (Google) for discovering and
    378      researching this issue.
    379      (CVE-2014-3511)
    380      [David Benjamin]
    382   *) OpenSSL DTLS clients enabling anonymous (EC)DH ciphersuites are subject
    383      to a denial of service attack. A malicious server can crash the client
    384      with a null pointer dereference (read) by specifying an anonymous (EC)DH
    385      ciphersuite and sending carefully crafted handshake messages.
    387      Thanks to Felix Grbert (Google) for discovering and researching this
    388      issue.
    389      (CVE-2014-3510)
    390      [Emilia Ksper]
    392   *) By sending carefully crafted DTLS packets an attacker could cause openssl
    393      to leak memory. This can be exploited through a Denial of Service attack.
    394      Thanks to Adam Langley for discovering and researching this issue.
    395      (CVE-2014-3507)
    396      [Adam Langley]
    398   *) An attacker can force openssl to consume large amounts of memory whilst
    399      processing DTLS handshake messages. This can be exploited through a
    400      Denial of Service attack.
    401      Thanks to Adam Langley for discovering and researching this issue.
    402      (CVE-2014-3506)
    403      [Adam Langley]
    405   *) An attacker can force an error condition which causes openssl to crash
    406      whilst processing DTLS packets due to memory being freed twice. This
    407      can be exploited through a Denial of Service attack.
    408      Thanks to Adam Langley and Wan-Teh Chang for discovering and researching
    409      this issue.
    410      (CVE-2014-3505)
    411      [Adam Langley]
    413   *) If a multithreaded client connects to a malicious server using a resumed
    414      session and the server sends an ec point format extension it could write
    415      up to 255 bytes to freed memory.
    417      Thanks to Gabor Tyukasz (LogMeIn Inc) for discovering and researching this
    418      issue.
    419      (CVE-2014-3509)
    420      [Gabor Tyukasz]
    422   *) A malicious server can crash an OpenSSL client with a null pointer
    423      dereference (read) by specifying an SRP ciphersuite even though it was not
    424      properly negotiated with the client. This can be exploited through a
    425      Denial of Service attack.
    427      Thanks to Joonas Kuorilehto and Riku Hietamki (Codenomicon) for
    428      discovering and researching this issue.
    429      (CVE-2014-5139)
    430      [Steve Henson]
    432   *) A flaw in OBJ_obj2txt may cause pretty printing functions such as
    433      X509_name_oneline, X509_name_print_ex et al. to leak some information
    434      from the stack. Applications may be affected if they echo pretty printing
    435      output to the attacker.
    437      Thanks to Ivan Fratric (Google) for discovering this issue.
    438      (CVE-2014-3508)
    439      [Emilia Ksper, and Steve Henson]
    441   *) Fix ec_GFp_simple_points_make_affine (thus, EC_POINTs_mul etc.)
    442      for corner cases. (Certain input points at infinity could lead to
    443      bogus results, with non-infinity inputs mapped to infinity too.)
    444      [Bodo Moeller]
    446  Changes between 1.0.1g and 1.0.1h [5 Jun 2014]
    448   *) Fix for SSL/TLS MITM flaw. An attacker using a carefully crafted
    449      handshake can force the use of weak keying material in OpenSSL
    450      SSL/TLS clients and servers.
    452      Thanks to KIKUCHI Masashi (Lepidum Co. Ltd.) for discovering and
    453      researching this issue. (CVE-2014-0224)
    454      [KIKUCHI Masashi, Steve Henson]
    456   *) Fix DTLS recursion flaw. By sending an invalid DTLS handshake to an
    457      OpenSSL DTLS client the code can be made to recurse eventually crashing
    458      in a DoS attack.
    460      Thanks to Imre Rad (Search-Lab Ltd.) for discovering this issue.
    461      (CVE-2014-0221)
    462      [Imre Rad, Steve Henson]
    464   *) Fix DTLS invalid fragment vulnerability. A buffer overrun attack can
    465      be triggered by sending invalid DTLS fragments to an OpenSSL DTLS
    466      client or server. This is potentially exploitable to run arbitrary
    467      code on a vulnerable client or server.
    469      Thanks to Jri Aedla for reporting this issue. (CVE-2014-0195)
    470      [Jri Aedla, Steve Henson]
    472   *) Fix bug in TLS code where clients enable anonymous ECDH ciphersuites
    473      are subject to a denial of service attack.
    475      Thanks to Felix Grbert and Ivan Fratric at Google for discovering
    476      this issue. (CVE-2014-3470)
    477      [Felix Grbert, Ivan Fratric, Steve Henson]
    479   *) Harmonize version and its documentation. -f flag is used to display
    480      compilation flags.
    481      [mancha <mancha1 (a] zoho.com>]
    483   *) Fix eckey_priv_encode so it immediately returns an error upon a failure
    484      in i2d_ECPrivateKey.
    485      [mancha <mancha1 (a] zoho.com>]
    487   *) Fix some double frees. These are not thought to be exploitable.
    488      [mancha <mancha1 (a] zoho.com>]
    490  Changes between 1.0.1f and 1.0.1g [7 Apr 2014]
    492   *) A missing bounds check in the handling of the TLS heartbeat extension
    493      can be used to reveal up to 64k of memory to a connected client or
    494      server.
    496      Thanks for Neel Mehta of Google Security for discovering this bug and to
    497      Adam Langley <agl (a] chromium.org> and Bodo Moeller <bmoeller (a] acm.org> for
    498      preparing the fix (CVE-2014-0160)
    499      [Adam Langley, Bodo Moeller]
    501   *) Fix for the attack described in the paper "Recovering OpenSSL
    502      ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack"
    503      by Yuval Yarom and Naomi Benger. Details can be obtained from:
    504      http://eprint.iacr.org/2014/140
    506      Thanks to Yuval Yarom and Naomi Benger for discovering this
    507      flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076)
    508      [Yuval Yarom and Naomi Benger]
    510   *) TLS pad extension: draft-agl-tls-padding-03
    512      Workaround for the "TLS hang bug" (see FAQ and PR#2771): if the
    513      TLS client Hello record length value would otherwise be > 255 and
    514      less that 512 pad with a dummy extension containing zeroes so it
    515      is at least 512 bytes long.
    517      [Adam Langley, Steve Henson]
    519  Changes between 1.0.1e and 1.0.1f [6 Jan 2014]
    521   *) Fix for TLS record tampering bug. A carefully crafted invalid 
    522      handshake could crash OpenSSL with a NULL pointer exception.
    523      Thanks to Anton Johansson for reporting this issues.
    524      (CVE-2013-4353)
    526   *) Keep original DTLS digest and encryption contexts in retransmission
    527      structures so we can use the previous session parameters if they need
    528      to be resent. (CVE-2013-6450)
    529      [Steve Henson]
    531   *) Add option SSL_OP_SAFARI_ECDHE_ECDSA_BUG (part of SSL_OP_ALL) which
    532      avoids preferring ECDHE-ECDSA ciphers when the client appears to be
    533      Safari on OS X.  Safari on OS X 10.8..10.8.3 advertises support for
    534      several ECDHE-ECDSA ciphers, but fails to negotiate them.  The bug
    535      is fixed in OS X 10.8.4, but Apple have ruled out both hot fixing
    536      10.8..10.8.3 and forcing users to upgrade to 10.8.4 or newer.
    537      [Rob Stradling, Adam Langley]
    539  Changes between 1.0.1d and 1.0.1e [11 Feb 2013]
    541   *) Correct fix for CVE-2013-0169. The original didn't work on AES-NI
    542      supporting platforms or when small records were transferred.
    543      [Andy Polyakov, Steve Henson]
    545  Changes between 1.0.1c and 1.0.1d [5 Feb 2013]
    547   *) Make the decoding of SSLv3, TLS and DTLS CBC records constant time.
    549      This addresses the flaw in CBC record processing discovered by 
    550      Nadhem Alfardan and Kenny Paterson. Details of this attack can be found
    551      at: http://www.isg.rhul.ac.uk/tls/     
    553      Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
    554      Security Group at Royal Holloway, University of London
    555      (www.isg.rhul.ac.uk) for discovering this flaw and Adam Langley and
    556      Emilia Ksper for the initial patch.
    557      (CVE-2013-0169)
    558      [Emilia Ksper, Adam Langley, Ben Laurie, Andy Polyakov, Steve Henson]
    560   *) Fix flaw in AESNI handling of TLS 1.2 and 1.1 records for CBC mode
    561      ciphersuites which can be exploited in a denial of service attack.
    562      Thanks go to and to Adam Langley <agl (a] chromium.org> for discovering
    563      and detecting this bug and to Wolfgang Ettlinger
    564      <wolfgang.ettlinger (a] gmail.com> for independently discovering this issue.
    565      (CVE-2012-2686)
    566      [Adam Langley]
    568   *) Return an error when checking OCSP signatures when key is NULL.
    569      This fixes a DoS attack. (CVE-2013-0166)
    570      [Steve Henson]
    572   *) Make openssl verify return errors.
    573      [Chris Palmer <palmer (a] google.com> and Ben Laurie]
    575   *) Call OCSP Stapling callback after ciphersuite has been chosen, so
    576      the right response is stapled. Also change SSL_get_certificate()
    577      so it returns the certificate actually sent.
    578      See http://rt.openssl.org/Ticket/Display.html?id=2836.
    579      [Rob Stradling <rob.stradling (a] comodo.com>]
    581   *) Fix possible deadlock when decoding public keys.
    582      [Steve Henson]
    584   *) Don't use TLS 1.0 record version number in initial client hello
    585      if renegotiating.
    586      [Steve Henson]
    588  Changes between 1.0.1b and 1.0.1c [10 May 2012]
    590   *) Sanity check record length before skipping explicit IV in TLS
    591      1.2, 1.1 and DTLS to fix DoS attack.
    593      Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic
    594      fuzzing as a service testing platform.
    595      (CVE-2012-2333)
    596      [Steve Henson]
    598   *) Initialise tkeylen properly when encrypting CMS messages.
    599      Thanks to Solar Designer of Openwall for reporting this issue.
    600      [Steve Henson]
    602   *) In FIPS mode don't try to use composite ciphers as they are not
    603      approved.
    604      [Steve Henson]
    606  Changes between 1.0.1a and 1.0.1b [26 Apr 2012]
    608   *) OpenSSL 1.0.0 sets SSL_OP_ALL to 0x80000FFFL and OpenSSL 1.0.1 and
    609      1.0.1a set SSL_OP_NO_TLSv1_1 to 0x00000400L which would unfortunately
    610      mean any application compiled against OpenSSL 1.0.0 headers setting
    611      SSL_OP_ALL would also set SSL_OP_NO_TLSv1_1, unintentionally disablng
    612      TLS 1.1 also. Fix this by changing the value of SSL_OP_NO_TLSv1_1 to
    613      0x10000000L Any application which was previously compiled against
    614      OpenSSL 1.0.1 or 1.0.1a headers and which cares about SSL_OP_NO_TLSv1_1
    615      will need to be recompiled as a result. Letting be results in
    616      inability to disable specifically TLS 1.1 and in client context,
    617      in unlike event, limit maximum offered version to TLS 1.0 [see below].
    618      [Steve Henson]
    620   *) In order to ensure interoperabilty SSL_OP_NO_protocolX does not
    621      disable just protocol X, but all protocols above X *if* there are
    622      protocols *below* X still enabled. In more practical terms it means
    623      that if application wants to disable TLS1.0 in favor of TLS1.1 and
    624      above, it's not sufficient to pass SSL_OP_NO_TLSv1, one has to pass
    625      SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2. This applies to
    626      client side.
    627      [Andy Polyakov]
    629  Changes between 1.0.1 and 1.0.1a [19 Apr 2012]
    631   *) Check for potentially exploitable overflows in asn1_d2i_read_bio
    632      BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
    633      in CRYPTO_realloc_clean.
    635      Thanks to Tavis Ormandy, Google Security Team, for discovering this
    636      issue and to Adam Langley <agl (a] chromium.org> for fixing it.
    637      (CVE-2012-2110)
    638      [Adam Langley (Google), Tavis Ormandy, Google Security Team]
    640   *) Don't allow TLS 1.2 SHA-256 ciphersuites in TLS 1.0, 1.1 connections.
    641      [Adam Langley]
    643   *) Workarounds for some broken servers that "hang" if a client hello
    644      record length exceeds 255 bytes.
    646      1. Do not use record version number > TLS 1.0 in initial client
    647         hello: some (but not all) hanging servers will now work.
    648      2. If we set OPENSSL_MAX_TLS1_2_CIPHER_LENGTH this will truncate
    649 	the number of ciphers sent in the client hello. This should be
    650         set to an even number, such as 50, for example by passing:
    651         -DOPENSSL_MAX_TLS1_2_CIPHER_LENGTH=50 to config or Configure.
    652         Most broken servers should now work.
    653      3. If all else fails setting OPENSSL_NO_TLS1_2_CLIENT will disable
    654 	TLS 1.2 client support entirely.
    655      [Steve Henson]
    657   *) Fix SEGV in Vector Permutation AES module observed in OpenSSH.
    658      [Andy Polyakov]
    660  Changes between 1.0.0h and 1.0.1  [14 Mar 2012]
    662   *) Add compatibility with old MDC2 signatures which use an ASN1 OCTET
    663      STRING form instead of a DigestInfo.
    664      [Steve Henson]
    666   *) The format used for MDC2 RSA signatures is inconsistent between EVP
    667      and the RSA_sign/RSA_verify functions. This was made more apparent when
    668      OpenSSL used RSA_sign/RSA_verify for some RSA signatures in particular
    669      those which went through EVP_PKEY_METHOD in 1.0.0 and later. Detect 
    670      the correct format in RSA_verify so both forms transparently work.
    671      [Steve Henson]
    673   *) Some servers which support TLS 1.0 can choke if we initially indicate
    674      support for TLS 1.2 and later renegotiate using TLS 1.0 in the RSA
    675      encrypted premaster secret. As a workaround use the maximum pemitted
    676      client version in client hello, this should keep such servers happy
    677      and still work with previous versions of OpenSSL.
    678      [Steve Henson]
    680   *) Add support for TLS/DTLS heartbeats.
    681      [Robin Seggelmann <seggelmann (a] fh-muenster.de>]
    683   *) Add support for SCTP.
    684      [Robin Seggelmann <seggelmann (a] fh-muenster.de>]
    686   *) Improved PRNG seeding for VOS.
    687      [Paul Green <Paul.Green (a] stratus.com>]
    689   *) Extensive assembler packs updates, most notably:
    691 	- x86[_64]:     AES-NI, PCLMULQDQ, RDRAND support;
    692 	- x86[_64]:     SSSE3 support (SHA1, vector-permutation AES);
    693 	- x86_64:       bit-sliced AES implementation;
    694 	- ARM:          NEON support, contemporary platforms optimizations;
    695 	- s390x:        z196 support;
    696 	- *:            GHASH and GF(2^m) multiplication implementations;
    698      [Andy Polyakov]
    700   *) Make TLS-SRP code conformant with RFC 5054 API cleanup
    701      (removal of unnecessary code)
    702      [Peter Sylvester <peter.sylvester (a] edelweb.fr>]
    704   *) Add TLS key material exporter from RFC 5705.
    705      [Eric Rescorla]
    707   *) Add DTLS-SRTP negotiation from RFC 5764.
    708      [Eric Rescorla]
    710   *) Add Next Protocol Negotiation,
    711      http://tools.ietf.org/html/draft-agl-tls-nextprotoneg-00. Can be
    712      disabled with a no-npn flag to config or Configure. Code donated
    713      by Google.
    714      [Adam Langley <agl (a] google.com> and Ben Laurie]
    716   *) Add optional 64-bit optimized implementations of elliptic curves NIST-P224,
    717      NIST-P256, NIST-P521, with constant-time single point multiplication on
    718      typical inputs. Compiler support for the nonstandard type __uint128_t is
    719      required to use this (present in gcc 4.4 and later, for 64-bit builds).
    720      Code made available under Apache License version 2.0.
    722      Specify "enable-ec_nistp_64_gcc_128" on the Configure (or config) command
    723      line to include this in your build of OpenSSL, and run "make depend" (or
    724      "make update"). This enables the following EC_METHODs:
    726          EC_GFp_nistp224_method()
    727          EC_GFp_nistp256_method()
    728          EC_GFp_nistp521_method()
    730      EC_GROUP_new_by_curve_name() will automatically use these (while
    731      EC_GROUP_new_curve_GFp() currently prefers the more flexible
    732      implementations).
    733      [Emilia Ksper, Adam Langley, Bodo Moeller (Google)]
    735   *) Use type ossl_ssize_t instad of ssize_t which isn't available on
    736      all platforms. Move ssize_t definition from e_os.h to the public
    737      header file e_os2.h as it now appears in public header file cms.h
    738      [Steve Henson]
    740   *) New -sigopt option to the ca, req and x509 utilities. Additional
    741      signature parameters can be passed using this option and in
    742      particular PSS. 
    743      [Steve Henson]
    745   *) Add RSA PSS signing function. This will generate and set the
    746      appropriate AlgorithmIdentifiers for PSS based on those in the
    747      corresponding EVP_MD_CTX structure. No application support yet.
    748      [Steve Henson]
    750   *) Support for companion algorithm specific ASN1 signing routines.
    751      New function ASN1_item_sign_ctx() signs a pre-initialised
    752      EVP_MD_CTX structure and sets AlgorithmIdentifiers based on
    753      the appropriate parameters.
    754      [Steve Henson]
    756   *) Add new algorithm specific ASN1 verification initialisation function
    757      to EVP_PKEY_ASN1_METHOD: this is not in EVP_PKEY_METHOD since the ASN1
    758      handling will be the same no matter what EVP_PKEY_METHOD is used.
    759      Add a PSS handler to support verification of PSS signatures: checked
    760      against a number of sample certificates.
    761      [Steve Henson]
    763   *) Add signature printing for PSS. Add PSS OIDs.
    764      [Steve Henson, Martin Kaiser <lists (a] kaiser.cx>]
    766   *) Add algorithm specific signature printing. An individual ASN1 method
    767      can now print out signatures instead of the standard hex dump. 
    769      More complex signatures (e.g. PSS) can print out more meaningful
    770      information. Include DSA version that prints out the signature
    771      parameters r, s.
    772      [Steve Henson]
    774   *) Password based recipient info support for CMS library: implementing
    775      RFC3211.
    776      [Steve Henson]
    778   *) Split password based encryption into PBES2 and PBKDF2 functions. This
    779      neatly separates the code into cipher and PBE sections and is required
    780      for some algorithms that split PBES2 into separate pieces (such as
    781      password based CMS).
    782      [Steve Henson]
    784   *) Session-handling fixes:
    785      - Fix handling of connections that are resuming with a session ID,
    786        but also support Session Tickets.
    787      - Fix a bug that suppressed issuing of a new ticket if the client
    788        presented a ticket with an expired session.
    789      - Try to set the ticket lifetime hint to something reasonable.
    790      - Make tickets shorter by excluding irrelevant information.
    791      - On the client side, don't ignore renewed tickets.
    792      [Adam Langley, Bodo Moeller (Google)]
    794   *) Fix PSK session representation.
    795      [Bodo Moeller]
    797   *) Add RC4-MD5 and AESNI-SHA1 "stitched" implementations.
    799      This work was sponsored by Intel.
    800      [Andy Polyakov]
    802   *) Add GCM support to TLS library. Some custom code is needed to split
    803      the IV between the fixed (from PRF) and explicit (from TLS record)
    804      portions. This adds all GCM ciphersuites supported by RFC5288 and 
    805      RFC5289. Generalise some AES* cipherstrings to inlclude GCM and
    806      add a special AESGCM string for GCM only.
    807      [Steve Henson]
    809   *) Expand range of ctrls for AES GCM. Permit setting invocation
    810      field on decrypt and retrieval of invocation field only on encrypt.
    811      [Steve Henson]
    813   *) Add HMAC ECC ciphersuites from RFC5289. Include SHA384 PRF support.
    814      As required by RFC5289 these ciphersuites cannot be used if for
    815      versions of TLS earlier than 1.2.
    816      [Steve Henson]
    818   *) For FIPS capable OpenSSL interpret a NULL default public key method
    819      as unset and return the appopriate default but do *not* set the default.
    820      This means we can return the appopriate method in applications that
    821      swicth between FIPS and non-FIPS modes.
    822      [Steve Henson]
    824   *) Redirect HMAC and CMAC operations to FIPS module in FIPS mode. If an
    825      ENGINE is used then we cannot handle that in the FIPS module so we
    826      keep original code iff non-FIPS operations are allowed.
    827      [Steve Henson]
    829   *) Add -attime option to openssl utilities.
    830      [Peter Eckersley <pde (a] eff.org>, Ben Laurie and Steve Henson]
    832   *) Redirect DSA and DH operations to FIPS module in FIPS mode.
    833      [Steve Henson]
    835   *) Redirect ECDSA and ECDH operations to FIPS module in FIPS mode. Also use
    836      FIPS EC methods unconditionally for now.
    837      [Steve Henson]
    839   *) New build option no-ec2m to disable characteristic 2 code.
    840      [Steve Henson]
    842   *) Backport libcrypto audit of return value checking from 1.1.0-dev; not
    843      all cases can be covered as some introduce binary incompatibilities.
    844      [Steve Henson]
    846   *) Redirect RSA operations to FIPS module including keygen,
    847      encrypt, decrypt, sign and verify. Block use of non FIPS RSA methods.
    848      [Steve Henson]
    850   *) Add similar low level API blocking to ciphers.
    851      [Steve Henson]
    853   *) Low level digest APIs are not approved in FIPS mode: any attempt
    854      to use these will cause a fatal error. Applications that *really* want
    855      to use them can use the private_* version instead.
    856      [Steve Henson]
    858   *) Redirect cipher operations to FIPS module for FIPS builds. 
    859      [Steve Henson]
    861   *) Redirect digest operations to FIPS module for FIPS builds. 
    862      [Steve Henson]
    864   *) Update build system to add "fips" flag which will link in fipscanister.o
    865      for static and shared library builds embedding a signature if needed.
    866      [Steve Henson]
    868   *) Output TLS supported curves in preference order instead of numerical
    869      order. This is currently hardcoded for the highest order curves first.
    870      This should be configurable so applications can judge speed vs strength.
    871      [Steve Henson]
    873   *) Add TLS v1.2 server support for client authentication. 
    874      [Steve Henson]
    876   *) Add support for FIPS mode in ssl library: disable SSLv3, non-FIPS ciphers
    877      and enable MD5.
    878      [Steve Henson]
    880   *) Functions FIPS_mode_set() and FIPS_mode() which call the underlying
    881      FIPS modules versions.
    882      [Steve Henson]
    884   *) Add TLS v1.2 client side support for client authentication. Keep cache
    885      of handshake records longer as we don't know the hash algorithm to use
    886      until after the certificate request message is received.
    887      [Steve Henson]
    889   *) Initial TLS v1.2 client support. Add a default signature algorithms
    890      extension including all the algorithms we support. Parse new signature
    891      format in client key exchange. Relax some ECC signing restrictions for
    892      TLS v1.2 as indicated in RFC5246.
    893      [Steve Henson]
    895   *) Add server support for TLS v1.2 signature algorithms extension. Switch
    896      to new signature format when needed using client digest preference.
    897      All server ciphersuites should now work correctly in TLS v1.2. No client
    898      support yet and no support for client certificates.
    899      [Steve Henson]
    901   *) Initial TLS v1.2 support. Add new SHA256 digest to ssl code, switch
    902      to SHA256 for PRF when using TLS v1.2 and later. Add new SHA256 based
    903      ciphersuites. At present only RSA key exchange ciphersuites work with
    904      TLS v1.2. Add new option for TLS v1.2 replacing the old and obsolete
    905      SSL_OP_PKCS1_CHECK flags with SSL_OP_NO_TLSv1_2. New TLSv1.2 methods
    906      and version checking.
    907      [Steve Henson]
    909   *) New option OPENSSL_NO_SSL_INTERN. If an application can be compiled
    910      with this defined it will not be affected by any changes to ssl internal
    911      structures. Add several utility functions to allow openssl application
    912      to work with OPENSSL_NO_SSL_INTERN defined.
    913      [Steve Henson]
    915   *) Add SRP support.
    916      [Tom Wu <tjw (a] cs.stanford.edu> and Ben Laurie]
    918   *) Add functions to copy EVP_PKEY_METHOD and retrieve flags and id.
    919      [Steve Henson]
    921   *) Permit abbreviated handshakes when renegotiating using the function
    922      SSL_renegotiate_abbreviated().
    923      [Robin Seggelmann <seggelmann (a] fh-muenster.de>]
    925   *) Add call to ENGINE_register_all_complete() to
    926      ENGINE_load_builtin_engines(), so some implementations get used
    927      automatically instead of needing explicit application support.
    928      [Steve Henson]
    930   *) Add support for TLS key exporter as described in RFC5705.
    931      [Robin Seggelmann <seggelmann (a] fh-muenster.de>, Steve Henson]
    933   *) Initial TLSv1.1 support. Since TLSv1.1 is very similar to TLS v1.0 only
    934      a few changes are required:
    936        Add SSL_OP_NO_TLSv1_1 flag.
    937        Add TLSv1_1 methods.
    938        Update version checking logic to handle version 1.1.
    939        Add explicit IV handling (ported from DTLS code).
    940        Add command line options to s_client/s_server.
    941      [Steve Henson]
    943  Changes between 1.0.0g and 1.0.0h [12 Mar 2012]
    945   *) Fix MMA (Bleichenbacher's attack on PKCS #1 v1.5 RSA padding) weakness
    946      in CMS and PKCS7 code. When RSA decryption fails use a random key for
    947      content decryption and always return the same error. Note: this attack
    948      needs on average 2^20 messages so it only affects automated senders. The
    949      old behaviour can be reenabled in the CMS code by setting the
    950      CMS_DEBUG_DECRYPT flag: this is useful for debugging and testing where
    951      an MMA defence is not necessary.
    952      Thanks to Ivan Nestlerode <inestlerode (a] us.ibm.com> for discovering
    953      this issue. (CVE-2012-0884)
    954      [Steve Henson]
    956   *) Fix CVE-2011-4619: make sure we really are receiving a 
    957      client hello before rejecting multiple SGC restarts. Thanks to
    958      Ivan Nestlerode <inestlerode (a] us.ibm.com> for discovering this bug.
    959      [Steve Henson]
    961  Changes between 1.0.0f and 1.0.0g [18 Jan 2012]
    963   *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
    964      Thanks to Antonio Martin, Enterprise Secure Access Research and
    965      Development, Cisco Systems, Inc. for discovering this bug and
    966      preparing a fix. (CVE-2012-0050)
    967      [Antonio Martin]
    969  Changes between 1.0.0e and 1.0.0f [4 Jan 2012]
    971   *) Nadhem Alfardan and Kenny Paterson have discovered an extension
    972      of the Vaudenay padding oracle attack on CBC mode encryption
    973      which enables an efficient plaintext recovery attack against
    974      the OpenSSL implementation of DTLS. Their attack exploits timing
    975      differences arising during decryption processing. A research
    976      paper describing this attack can be found at:
    977                   http://www.isg.rhul.ac.uk/~kp/dtls.pdf
    978      Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
    979      Security Group at Royal Holloway, University of London
    980      (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
    981      <seggelmann (a] fh-muenster.de> and Michael Tuexen <tuexen (a] fh-muenster.de>
    982      for preparing the fix. (CVE-2011-4108)
    983      [Robin Seggelmann, Michael Tuexen]
    985   *) Clear bytes used for block padding of SSL 3.0 records.
    986      (CVE-2011-4576)
    987      [Adam Langley (Google)]
    989   *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
    990      Kadianakis <desnacked (a] gmail.com> for discovering this issue and
    991      Adam Langley for preparing the fix. (CVE-2011-4619)
    992      [Adam Langley (Google)]
    994   *) Check parameters are not NULL in GOST ENGINE. (CVE-2012-0027)
    995      [Andrey Kulikov <amdeich (a] gmail.com>]
    997   *) Prevent malformed RFC3779 data triggering an assertion failure.
    998      Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
    999      and Rob Austein <sra (a] hactrn.net> for fixing it. (CVE-2011-4577)
   1000      [Rob Austein <sra (a] hactrn.net>]
   1002   *) Improved PRNG seeding for VOS.
   1003      [Paul Green <Paul.Green (a] stratus.com>]
   1005   *) Fix ssl_ciph.c set-up race.
   1006      [Adam Langley (Google)]
   1008   *) Fix spurious failures in ecdsatest.c.
   1009      [Emilia Ksper (Google)]
   1011   *) Fix the BIO_f_buffer() implementation (which was mixing different
   1012      interpretations of the '..._len' fields).
   1013      [Adam Langley (Google)]
   1015   *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
   1016      BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
   1017      threads won't reuse the same blinding coefficients.
   1019      This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
   1020      lock to call BN_BLINDING_invert_ex, and avoids one use of
   1021      BN_BLINDING_update for each BN_BLINDING structure (previously,
   1022      the last update always remained unused).
   1023      [Emilia Ksper (Google)]
   1025   *) In ssl3_clear, preserve s3->init_extra along with s3->rbuf.
   1026      [Bob Buckholz (Google)]
   1028  Changes between 1.0.0d and 1.0.0e [6 Sep 2011]
   1030   *) Fix bug where CRLs with nextUpdate in the past are sometimes accepted
   1031      by initialising X509_STORE_CTX properly. (CVE-2011-3207)
   1032      [Kaspar Brand <ossl (a] velox.ch>]
   1034   *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
   1035      for multi-threaded use of ECDH. (CVE-2011-3210)
   1036      [Adam Langley (Google)]
   1038   *) Fix x509_name_ex_d2i memory leak on bad inputs.
   1039      [Bodo Moeller]
   1041   *) Remove hard coded ecdsaWithSHA1 signature tests in ssl code and check
   1042      signature public key algorithm by using OID xref utilities instead.
   1043      Before this you could only use some ECC ciphersuites with SHA1 only.
   1044      [Steve Henson]
   1046   *) Add protection against ECDSA timing attacks as mentioned in the paper
   1047      by Billy Bob Brumley and Nicola Tuveri, see:
   1049 	http://eprint.iacr.org/2011/232.pdf
   1051      [Billy Bob Brumley and Nicola Tuveri]
   1053  Changes between 1.0.0c and 1.0.0d [8 Feb 2011]
   1055   *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
   1056      [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
   1058   *) Fix bug in string printing code: if *any* escaping is enabled we must
   1059      escape the escape character (backslash) or the resulting string is
   1060      ambiguous.
   1061      [Steve Henson]
   1063  Changes between 1.0.0b and 1.0.0c  [2 Dec 2010]
   1065   *) Disable code workaround for ancient and obsolete Netscape browsers
   1066      and servers: an attacker can use it in a ciphersuite downgrade attack.
   1067      Thanks to Martin Rex for discovering this bug. CVE-2010-4180
   1068      [Steve Henson]
   1070   *) Fixed J-PAKE implementation error, originally discovered by
   1071      Sebastien Martini, further info and confirmation from Stefan
   1072      Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
   1073      [Ben Laurie]
   1075  Changes between 1.0.0a and 1.0.0b  [16 Nov 2010]
   1077   *) Fix extension code to avoid race conditions which can result in a buffer
   1078      overrun vulnerability: resumed sessions must not be modified as they can
   1079      be shared by multiple threads. CVE-2010-3864
   1080      [Steve Henson]
   1082   *) Fix WIN32 build system to correctly link an ENGINE directory into
   1083      a DLL. 
   1084      [Steve Henson]
   1086  Changes between 1.0.0 and 1.0.0a  [01 Jun 2010]
   1088   *) Check return value of int_rsa_verify in pkey_rsa_verifyrecover 
   1089      (CVE-2010-1633)
   1090      [Steve Henson, Peter-Michael Hager <hager (a] dortmund.net>]
   1092  Changes between 0.9.8n and 1.0.0  [29 Mar 2010]
   1094   *) Add "missing" function EVP_CIPHER_CTX_copy(). This copies a cipher
   1095      context. The operation can be customised via the ctrl mechanism in
   1096      case ENGINEs want to include additional functionality.
   1097      [Steve Henson]
   1099   *) Tolerate yet another broken PKCS#8 key format: private key value negative.
   1100      [Steve Henson]
   1102   *) Add new -subject_hash_old and -issuer_hash_old options to x509 utility to
   1103      output hashes compatible with older versions of OpenSSL.
   1104      [Willy Weisz <weisz (a] vcpc.univie.ac.at>]
   1106   *) Fix compression algorithm handling: if resuming a session use the
   1107      compression algorithm of the resumed session instead of determining
   1108      it from client hello again. Don't allow server to change algorithm.
   1109      [Steve Henson]
   1111   *) Add load_crls() function to apps tidying load_certs() too. Add option
   1112      to verify utility to allow additional CRLs to be included.
   1113      [Steve Henson]
   1115   *) Update OCSP request code to permit adding custom headers to the request:
   1116      some responders need this.
   1117      [Steve Henson]
   1119   *) The function EVP_PKEY_sign() returns <=0 on error: check return code
   1120      correctly.
   1121      [Julia Lawall <julia (a] diku.dk>]
   1123   *) Update verify callback code in apps/s_cb.c and apps/verify.c, it
   1124      needlessly dereferenced structures, used obsolete functions and
   1125      didn't handle all updated verify codes correctly.
   1126      [Steve Henson]
   1128   *) Disable MD2 in the default configuration.
   1129      [Steve Henson]
   1131   *) In BIO_pop() and BIO_push() use the ctrl argument (which was NULL) to
   1132      indicate the initial BIO being pushed or popped. This makes it possible
   1133      to determine whether the BIO is the one explicitly called or as a result
   1134      of the ctrl being passed down the chain. Fix BIO_pop() and SSL BIOs so
   1135      it handles reference counts correctly and doesn't zero out the I/O bio
   1136      when it is not being explicitly popped. WARNING: applications which
   1137      included workarounds for the old buggy behaviour will need to be modified
   1138      or they could free up already freed BIOs.
   1139      [Steve Henson]
   1141   *) Extend the uni2asc/asc2uni => OPENSSL_uni2asc/OPENSSL_asc2uni
   1142      renaming to all platforms (within the 0.9.8 branch, this was
   1143      done conditionally on Netware platforms to avoid a name clash).
   1144      [Guenter <lists (a] gknw.net>]
   1146   *) Add ECDHE and PSK support to DTLS.
   1147      [Michael Tuexen <tuexen (a] fh-muenster.de>]
   1149   *) Add CHECKED_STACK_OF macro to safestack.h, otherwise safestack can't
   1150      be used on C++.
   1151      [Steve Henson]
   1153   *) Add "missing" function EVP_MD_flags() (without this the only way to
   1154      retrieve a digest flags is by accessing the structure directly. Update
   1155      EVP_MD_do_all*() and EVP_CIPHER_do_all*() to include the name a digest
   1156      or cipher is registered as in the "from" argument. Print out all
   1157      registered digests in the dgst usage message instead of manually 
   1158      attempting to work them out.
   1159      [Steve Henson]
   1161   *) If no SSLv2 ciphers are used don't use an SSLv2 compatible client hello:
   1162      this allows the use of compression and extensions. Change default cipher
   1163      string to remove SSLv2 ciphersuites. This effectively avoids ancient SSLv2
   1164      by default unless an application cipher string requests it.
   1165      [Steve Henson]
   1167   *) Alter match criteria in PKCS12_parse(). It used to try to use local
   1168      key ids to find matching certificates and keys but some PKCS#12 files
   1169      don't follow the (somewhat unwritten) rules and this strategy fails.
   1170      Now just gather all certificates together and the first private key
   1171      then look for the first certificate that matches the key.
   1172      [Steve Henson]
   1174   *) Support use of registered digest and cipher names for dgst and cipher
   1175      commands instead of having to add each one as a special case. So now
   1176      you can do:
   1178         openssl sha256 foo
   1180      as well as:
   1182         openssl dgst -sha256 foo
   1184      and this works for ENGINE based algorithms too.
   1186      [Steve Henson]
   1188   *) Update Gost ENGINE to support parameter files.
   1189      [Victor B. Wagner <vitus (a] cryptocom.ru>]
   1191   *) Support GeneralizedTime in ca utility. 
   1192      [Oliver Martin <oliver (a] volatilevoid.net>, Steve Henson]
   1194   *) Enhance the hash format used for certificate directory links. The new
   1195      form uses the canonical encoding (meaning equivalent names will work
   1196      even if they aren't identical) and uses SHA1 instead of MD5. This form
   1197      is incompatible with the older format and as a result c_rehash should
   1198      be used to rebuild symbolic links.
   1199      [Steve Henson]
   1201   *) Make PKCS#8 the default write format for private keys, replacing the
   1202      traditional format. This form is standardised, more secure and doesn't
   1203      include an implicit MD5 dependency.
   1204      [Steve Henson]
   1206   *) Add a $gcc_devteam_warn option to Configure. The idea is that any code
   1207      committed to OpenSSL should pass this lot as a minimum.
   1208      [Steve Henson]
   1210   *) Add session ticket override functionality for use by EAP-FAST.
   1211      [Jouni Malinen <j (a] w1.fi>]
   1213   *) Modify HMAC functions to return a value. Since these can be implemented
   1214      in an ENGINE errors can occur.
   1215      [Steve Henson]
   1217   *) Type-checked OBJ_bsearch_ex.
   1218      [Ben Laurie]
   1220   *) Type-checked OBJ_bsearch. Also some constification necessitated
   1221      by type-checking.  Still to come: TXT_DB, bsearch(?),
   1222      OBJ_bsearch_ex, qsort, CRYPTO_EX_DATA, ASN1_VALUE, ASN1_STRING,
   1223      CONF_VALUE.
   1224      [Ben Laurie]
   1226   *) New function OPENSSL_gmtime_adj() to add a specific number of days and
   1227      seconds to a tm structure directly, instead of going through OS
   1228      specific date routines. This avoids any issues with OS routines such
   1229      as the year 2038 bug. New *_adj() functions for ASN1 time structures
   1230      and X509_time_adj_ex() to cover the extended range. The existing
   1231      X509_time_adj() is still usable and will no longer have any date issues.
   1232      [Steve Henson]
   1234   *) Delta CRL support. New use deltas option which will attempt to locate
   1235      and search any appropriate delta CRLs available.
   1237      This work was sponsored by Google.
   1238      [Steve Henson]
   1240   *) Support for CRLs partitioned by reason code. Reorganise CRL processing
   1241      code and add additional score elements. Validate alternate CRL paths
   1242      as part of the CRL checking and indicate a new error "CRL path validation
   1243      error" in this case. Applications wanting additional details can use
   1244      the verify callback and check the new "parent" field. If this is not
   1245      NULL CRL path validation is taking place. Existing applications wont
   1246      see this because it requires extended CRL support which is off by
   1247      default.
   1249      This work was sponsored by Google.
   1250      [Steve Henson]
   1252   *) Support for freshest CRL extension.
   1254      This work was sponsored by Google.
   1255      [Steve Henson]
   1257   *) Initial indirect CRL support. Currently only supported in the CRLs
   1258      passed directly and not via lookup. Process certificate issuer
   1259      CRL entry extension and lookup CRL entries by bother issuer name
   1260      and serial number. Check and process CRL issuer entry in IDP extension.
   1262      This work was sponsored by Google.
   1263      [Steve Henson]
   1265   *) Add support for distinct certificate and CRL paths. The CRL issuer
   1266      certificate is validated separately in this case. Only enabled if
   1267      an extended CRL support flag is set: this flag will enable additional
   1268      CRL functionality in future.
   1270      This work was sponsored by Google.
   1271      [Steve Henson]
   1273   *) Add support for policy mappings extension.
   1275      This work was sponsored by Google.
   1276      [Steve Henson]
   1278   *) Fixes to pathlength constraint, self issued certificate handling,
   1279      policy processing to align with RFC3280 and PKITS tests.
   1281      This work was sponsored by Google.
   1282      [Steve Henson]
   1284   *) Support for name constraints certificate extension. DN, email, DNS
   1285      and URI types are currently supported.
   1287      This work was sponsored by Google.
   1288      [Steve Henson]
   1290   *) To cater for systems that provide a pointer-based thread ID rather
   1291      than numeric, deprecate the current numeric thread ID mechanism and
   1292      replace it with a structure and associated callback type. This
   1293      mechanism allows a numeric "hash" to be extracted from a thread ID in
   1294      either case, and on platforms where pointers are larger than 'long',
   1295      mixing is done to help ensure the numeric 'hash' is usable even if it
   1296      can't be guaranteed unique. The default mechanism is to use "&errno"
   1297      as a pointer-based thread ID to distinguish between threads.
   1299      Applications that want to provide their own thread IDs should now use
   1300      CRYPTO_THREADID_set_callback() to register a callback that will call
   1301      either CRYPTO_THREADID_set_numeric() or CRYPTO_THREADID_set_pointer().
   1303      Note that ERR_remove_state() is now deprecated, because it is tied
   1304      to the assumption that thread IDs are numeric.  ERR_remove_state(0)
   1305      to free the current thread's error state should be replaced by
   1306      ERR_remove_thread_state(NULL).
   1308      (This new approach replaces the functions CRYPTO_set_idptr_callback(),
   1309      CRYPTO_get_idptr_callback(), and CRYPTO_thread_idptr() that existed in
   1310      OpenSSL 0.9.9-dev between June 2006 and August 2008. Also, if an
   1311      application was previously providing a numeric thread callback that
   1312      was inappropriate for distinguishing threads, then uniqueness might
   1313      have been obtained with &errno that happened immediately in the
   1314      intermediate development versions of OpenSSL; this is no longer the
   1315      case, the numeric thread callback will now override the automatic use
   1316      of &errno.)
   1317      [Geoff Thorpe, with help from Bodo Moeller]
   1319   *) Initial support for different CRL issuing certificates. This covers a
   1320      simple case where the self issued certificates in the chain exist and
   1321      the real CRL issuer is higher in the existing chain.
   1323      This work was sponsored by Google.
   1324      [Steve Henson]
   1326   *) Removed effectively defunct crypto/store from the build.
   1327      [Ben Laurie]
   1329   *) Revamp of STACK to provide stronger type-checking. Still to come:
   1330      TXT_DB, bsearch(?), OBJ_bsearch, qsort, CRYPTO_EX_DATA, ASN1_VALUE,
   1331      ASN1_STRING, CONF_VALUE.
   1332      [Ben Laurie]
   1334   *) Add a new SSL_MODE_RELEASE_BUFFERS mode flag to release unused buffer
   1335      RAM on SSL connections.  This option can save about 34k per idle SSL.
   1336      [Nick Mathewson]
   1338   *) Revamp of LHASH to provide stronger type-checking. Still to come:
   1339      STACK, TXT_DB, bsearch, qsort.
   1340      [Ben Laurie]
   1342   *) Initial support for Cryptographic Message Syntax (aka CMS) based
   1343      on RFC3850, RFC3851 and RFC3852. New cms directory and cms utility,
   1344      support for data, signedData, compressedData, digestedData and
   1345      encryptedData, envelopedData types included. Scripts to check against
   1346      RFC4134 examples draft and interop and consistency checks of many
   1347      content types and variants.
   1348      [Steve Henson]
   1350   *) Add options to enc utility to support use of zlib compression BIO.
   1351      [Steve Henson]
   1353   *) Extend mk1mf to support importing of options and assembly language
   1354      files from Configure script, currently only included in VC-WIN32.
   1355      The assembly language rules can now optionally generate the source
   1356      files from the associated perl scripts.
   1357      [Steve Henson]
   1359   *) Implement remaining functionality needed to support GOST ciphersuites.
   1360      Interop testing has been performed using CryptoPro implementations.
   1361      [Victor B. Wagner <vitus (a] cryptocom.ru>]
   1363   *) s390x assembler pack.
   1364      [Andy Polyakov]
   1366   *) ARMv4 assembler pack. ARMv4 refers to v4 and later ISA, not CPU
   1367      "family."
   1368      [Andy Polyakov]
   1370   *) Implement Opaque PRF Input TLS extension as specified in
   1371      draft-rescorla-tls-opaque-prf-input-00.txt.  Since this is not an
   1372      official specification yet and no extension type assignment by
   1373      IANA exists, this extension (for now) will have to be explicitly
   1374      enabled when building OpenSSL by providing the extension number
   1375      to use.  For example, specify an option
   1377          -DTLSEXT_TYPE_opaque_prf_input=0x9527
   1379      to the "config" or "Configure" script to enable the extension,
   1380      assuming extension number 0x9527 (which is a completely arbitrary
   1381      and unofficial assignment based on the MD5 hash of the Internet
   1382      Draft).  Note that by doing so, you potentially lose
   1383      interoperability with other TLS implementations since these might
   1384      be using the same extension number for other purposes.
   1386      SSL_set_tlsext_opaque_prf_input(ssl, src, len) is used to set the
   1387      opaque PRF input value to use in the handshake.  This will create
   1388      an interal copy of the length-'len' string at 'src', and will
   1389      return non-zero for success.
   1391      To get more control and flexibility, provide a callback function
   1392      by using
   1394           SSL_CTX_set_tlsext_opaque_prf_input_callback(ctx, cb)
   1395           SSL_CTX_set_tlsext_opaque_prf_input_callback_arg(ctx, arg)
   1397      where
   1399           int (*cb)(SSL *, void *peerinput, size_t len, void *arg);
   1400           void *arg;
   1402      Callback function 'cb' will be called in handshakes, and is
   1403      expected to use SSL_set_tlsext_opaque_prf_input() as appropriate.
   1404      Argument 'arg' is for application purposes (the value as given to
   1405      SSL_CTX_set_tlsext_opaque_prf_input_callback_arg() will directly
   1406      be provided to the callback function).  The callback function
   1407      has to return non-zero to report success: usually 1 to use opaque
   1408      PRF input just if possible, or 2 to enforce use of the opaque PRF
   1409      input.  In the latter case, the library will abort the handshake
   1410      if opaque PRF input is not successfully negotiated.
   1412      Arguments 'peerinput' and 'len' given to the callback function
   1413      will always be NULL and 0 in the case of a client.  A server will
   1414      see the client's opaque PRF input through these variables if
   1415      available (NULL and 0 otherwise).  Note that if the server
   1416      provides an opaque PRF input, the length must be the same as the
   1417      length of the client's opaque PRF input.
   1419      Note that the callback function will only be called when creating
   1420      a new session (session resumption can resume whatever was
   1421      previously negotiated), and will not be called in SSL 2.0
   1422      handshakes; thus, SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) or
   1423      SSL_set_options(ssl, SSL_OP_NO_SSLv2) is especially recommended
   1424      for applications that need to enforce opaque PRF input.
   1426      [Bodo Moeller]
   1428   *) Update ssl code to support digests other than SHA1+MD5 for handshake
   1429      MAC. 
   1431      [Victor B. Wagner <vitus (a] cryptocom.ru>]
   1433   *) Add RFC4507 support to OpenSSL. This includes the corrections in
   1434      RFC4507bis. The encrypted ticket format is an encrypted encoded
   1435      SSL_SESSION structure, that way new session features are automatically
   1436      supported.
   1438      If a client application caches session in an SSL_SESSION structure
   1439      support is transparent because tickets are now stored in the encoded
   1440      SSL_SESSION.
   1442      The SSL_CTX structure automatically generates keys for ticket
   1443      protection in servers so again support should be possible
   1444      with no application modification.
   1446      If a client or server wishes to disable RFC4507 support then the option
   1447      SSL_OP_NO_TICKET can be set.
   1449      Add a TLS extension debugging callback to allow the contents of any client
   1450      or server extensions to be examined.
   1452      This work was sponsored by Google.
   1453      [Steve Henson]
   1455   *) Final changes to avoid use of pointer pointer casts in OpenSSL.
   1456      OpenSSL should now compile cleanly on gcc 4.2
   1457      [Peter Hartley <pdh (a] utter.chaos.org.uk>, Steve Henson]
   1459   *) Update SSL library to use new EVP_PKEY MAC API. Include generic MAC
   1460      support including streaming MAC support: this is required for GOST
   1461      ciphersuite support.
   1462      [Victor B. Wagner <vitus (a] cryptocom.ru>, Steve Henson]
   1464   *) Add option -stream to use PKCS#7 streaming in smime utility. New
   1465      function i2d_PKCS7_bio_stream() and PEM_write_PKCS7_bio_stream()
   1466      to output in BER and PEM format.
   1467      [Steve Henson]
   1469   *) Experimental support for use of HMAC via EVP_PKEY interface. This
   1470      allows HMAC to be handled via the EVP_DigestSign*() interface. The
   1471      EVP_PKEY "key" in this case is the HMAC key, potentially allowing
   1472      ENGINE support for HMAC keys which are unextractable. New -mac and
   1473      -macopt options to dgst utility.
   1474      [Steve Henson]
   1476   *) New option -sigopt to dgst utility. Update dgst to use
   1477      EVP_Digest{Sign,Verify}*. These two changes make it possible to use
   1478      alternative signing paramaters such as X9.31 or PSS in the dgst 
   1479      utility.
   1480      [Steve Henson]
   1482   *) Change ssl_cipher_apply_rule(), the internal function that does
   1483      the work each time a ciphersuite string requests enabling
   1484      ("foo+bar"), moving ("+foo+bar"), disabling ("-foo+bar", or
   1485      removing ("!foo+bar") a class of ciphersuites: Now it maintains
   1486      the order of disabled ciphersuites such that those ciphersuites
   1487      that most recently went from enabled to disabled not only stay
   1488      in order with respect to each other, but also have higher priority
   1489      than other disabled ciphersuites the next time ciphersuites are
   1490      enabled again.
   1492      This means that you can now say, e.g., "PSK:-PSK:HIGH" to enable
   1493      the same ciphersuites as with "HIGH" alone, but in a specific
   1494      order where the PSK ciphersuites come first (since they are the
   1495      most recently disabled ciphersuites when "HIGH" is parsed).
   1497      Also, change ssl_create_cipher_list() (using this new
   1498      funcionality) such that between otherwise identical
   1499      cihpersuites, ephemeral ECDH is preferred over ephemeral DH in
   1500      the default order.
   1501      [Bodo Moeller]
   1503   *) Change ssl_create_cipher_list() so that it automatically
   1504      arranges the ciphersuites in reasonable order before starting
   1505      to process the rule string.  Thus, the definition for "DEFAULT"
   1506      (SSL_DEFAULT_CIPHER_LIST) now is just "ALL:!aNULL:!eNULL", but
   1507      remains equivalent to "AES:ALL:!aNULL:!eNULL:+aECDH:+kRSA:+RC4:@STRENGTH".
   1508      This makes it much easier to arrive at a reasonable default order
   1509      in applications for which anonymous ciphers are OK (meaning
   1510      that you can't actually use DEFAULT).
   1511      [Bodo Moeller; suggested by Victor Duchovni]
   1513   *) Split the SSL/TLS algorithm mask (as used for ciphersuite string
   1514      processing) into multiple integers instead of setting
   1515      "SSL_MKEY_MASK" bits, "SSL_AUTH_MASK" bits, "SSL_ENC_MASK",
   1516      "SSL_MAC_MASK", and "SSL_SSL_MASK" bits all in a single integer.
   1517      (These masks as well as the individual bit definitions are hidden
   1518      away into the non-exported interface ssl/ssl_locl.h, so this
   1519      change to the definition of the SSL_CIPHER structure shouldn't
   1520      affect applications.)  This give us more bits for each of these
   1521      categories, so there is no longer a need to coagulate AES128 and
   1522      AES256 into a single algorithm bit, and to coagulate Camellia128
   1523      and Camellia256 into a single algorithm bit, which has led to all
   1524      kinds of kludges.
   1526      Thus, among other things, the kludge introduced in 0.9.7m and
   1527      0.9.8e for masking out AES256 independently of AES128 or masking
   1528      out Camellia256 independently of AES256 is not needed here in 0.9.9.
   1530      With the change, we also introduce new ciphersuite aliases that
   1531      so far were missing: "AES128", "AES256", "CAMELLIA128", and
   1532      "CAMELLIA256".
   1533      [Bodo Moeller]
   1535   *) Add support for dsa-with-SHA224 and dsa-with-SHA256.
   1536      Use the leftmost N bytes of the signature input if the input is
   1537      larger than the prime q (with N being the size in bytes of q).
   1538      [Nils Larsch]
   1540   *) Very *very* experimental PKCS#7 streaming encoder support. Nothing uses
   1541      it yet and it is largely untested.
   1542      [Steve Henson]
   1544   *) Add support for the ecdsa-with-SHA224/256/384/512 signature types.
   1545      [Nils Larsch]
   1547   *) Initial incomplete changes to avoid need for function casts in OpenSSL
   1548      some compilers (gcc 4.2 and later) reject their use. Safestack is
   1549      reimplemented.  Update ASN1 to avoid use of legacy functions. 
   1550      [Steve Henson]
   1552   *) Win32/64 targets are linked with Winsock2.
   1553      [Andy Polyakov]
   1555   *) Add an X509_CRL_METHOD structure to allow CRL processing to be redirected
   1556      to external functions. This can be used to increase CRL handling 
   1557      efficiency especially when CRLs are very large by (for example) storing
   1558      the CRL revoked certificates in a database.
   1559      [Steve Henson]
   1561   *) Overhaul of by_dir code. Add support for dynamic loading of CRLs so
   1562      new CRLs added to a directory can be used. New command line option
   1563      -verify_return_error to s_client and s_server. This causes real errors
   1564      to be returned by the verify callback instead of carrying on no matter
   1565      what. This reflects the way a "real world" verify callback would behave.
   1566      [Steve Henson]
   1568   *) GOST engine, supporting several GOST algorithms and public key formats.
   1569      Kindly donated by Cryptocom.
   1570      [Cryptocom]
   1572   *) Partial support for Issuing Distribution Point CRL extension. CRLs
   1573      partitioned by DP are handled but no indirect CRL or reason partitioning
   1574      (yet). Complete overhaul of CRL handling: now the most suitable CRL is
   1575      selected via a scoring technique which handles IDP and AKID in CRLs.
   1576      [Steve Henson]
   1578   *) New X509_STORE_CTX callbacks lookup_crls() and lookup_certs() which
   1579      will ultimately be used for all verify operations: this will remove the
   1580      X509_STORE dependency on certificate verification and allow alternative
   1581      lookup methods.  X509_STORE based implementations of these two callbacks.
   1582      [Steve Henson]
   1584   *) Allow multiple CRLs to exist in an X509_STORE with matching issuer names.
   1585      Modify get_crl() to find a valid (unexpired) CRL if possible.
   1586      [Steve Henson]
   1588   *) New function X509_CRL_match() to check if two CRLs are identical. Normally
   1589      this would be called X509_CRL_cmp() but that name is already used by
   1590      a function that just compares CRL issuer names. Cache several CRL 
   1591      extensions in X509_CRL structure and cache CRLDP in X509.
   1592      [Steve Henson]
   1594   *) Store a "canonical" representation of X509_NAME structure (ASN1 Name)
   1595      this maps equivalent X509_NAME structures into a consistent structure.
   1596      Name comparison can then be performed rapidly using memcmp().
   1597      [Steve Henson]
   1599   *) Non-blocking OCSP request processing. Add -timeout option to ocsp 
   1600      utility.
   1601      [Steve Henson]
   1603   *) Allow digests to supply their own micalg string for S/MIME type using
   1604      the ctrl EVP_MD_CTRL_MICALG.
   1605      [Steve Henson]
   1607   *) During PKCS7 signing pass the PKCS7 SignerInfo structure to the
   1608      EVP_PKEY_METHOD before and after signing via the EVP_PKEY_CTRL_PKCS7_SIGN
   1609      ctrl. It can then customise the structure before and/or after signing
   1610      if necessary.
   1611      [Steve Henson]
   1613   *) New function OBJ_add_sigid() to allow application defined signature OIDs
   1614      to be added to OpenSSLs internal tables. New function OBJ_sigid_free()
   1615      to free up any added signature OIDs.
   1616      [Steve Henson]
   1618   *) New functions EVP_CIPHER_do_all(), EVP_CIPHER_do_all_sorted(),
   1619      EVP_MD_do_all() and EVP_MD_do_all_sorted() to enumerate internal
   1620      digest and cipher tables. New options added to openssl utility:
   1621      list-message-digest-algorithms and list-cipher-algorithms.
   1622      [Steve Henson]
   1624   *) Change the array representation of binary polynomials: the list
   1625      of degrees of non-zero coefficients is now terminated with -1.
   1626      Previously it was terminated with 0, which was also part of the
   1627      value; thus, the array representation was not applicable to
   1628      polynomials where t^0 has coefficient zero.  This change makes
   1629      the array representation useful in a more general context.
   1630      [Douglas Stebila]
   1632   *) Various modifications and fixes to SSL/TLS cipher string
   1633      handling.  For ECC, the code now distinguishes between fixed ECDH
   1634      with RSA certificates on the one hand and with ECDSA certificates
   1635      on the other hand, since these are separate ciphersuites.  The
   1636      unused code for Fortezza ciphersuites has been removed.
   1638      For consistency with EDH, ephemeral ECDH is now called "EECDH"
   1639      (not "ECDHE").  For consistency with the code for DH
   1640      certificates, use of ECDH certificates is now considered ECDH
   1641      authentication, not RSA or ECDSA authentication (the latter is
   1642      merely the CA's signing algorithm and not actively used in the
   1643      protocol).
   1645      The temporary ciphersuite alias "ECCdraft" is no longer
   1646      available, and ECC ciphersuites are no longer excluded from "ALL"
   1647      and "DEFAULT".  The following aliases now exist for RFC 4492
   1648      ciphersuites, most of these by analogy with the DH case:
   1650          kECDHr   - ECDH cert, signed with RSA
   1651          kECDHe   - ECDH cert, signed with ECDSA
   1652          kECDH    - ECDH cert (signed with either RSA or ECDSA)
   1653          kEECDH   - ephemeral ECDH
   1654          ECDH     - ECDH cert or ephemeral ECDH
   1656          aECDH    - ECDH cert
   1657          aECDSA   - ECDSA cert
   1658          ECDSA    - ECDSA cert
   1660          AECDH    - anonymous ECDH
   1661          EECDH    - non-anonymous ephemeral ECDH (equivalent to "kEECDH:-AECDH")
   1663      [Bodo Moeller]
   1665   *) Add additional S/MIME capabilities for AES and GOST ciphers if supported.
   1666      Use correct micalg parameters depending on digest(s) in signed message.
   1667      [Steve Henson]
   1669   *) Add engine support for EVP_PKEY_ASN1_METHOD. Add functions to process
   1670      an ENGINE asn1 method. Support ENGINE lookups in the ASN1 code.
   1671      [Steve Henson]
   1673   *) Initial engine support for EVP_PKEY_METHOD. New functions to permit
   1674      an engine to register a method. Add ENGINE lookups for methods and
   1675      functional reference processing.
   1676      [Steve Henson]
   1678   *) New functions EVP_Digest{Sign,Verify)*. These are enchance versions of
   1679      EVP_{Sign,Verify}* which allow an application to customise the signature
   1680      process.
   1681      [Steve Henson]
   1683   *) New -resign option to smime utility. This adds one or more signers
   1684      to an existing PKCS#7 signedData structure. Also -md option to use an
   1685      alternative message digest algorithm for signing.
   1686      [Steve Henson]
   1688   *) Tidy up PKCS#7 routines and add new functions to make it easier to
   1689      create PKCS7 structures containing multiple signers. Update smime
   1690      application to support multiple signers.
   1691      [Steve Henson]
   1693   *) New -macalg option to pkcs12 utility to allow setting of an alternative
   1694      digest MAC.
   1695      [Steve Henson]
   1697   *) Initial support for PKCS#5 v2.0 PRFs other than default SHA1 HMAC.
   1698      Reorganize PBE internals to lookup from a static table using NIDs,
   1699      add support for HMAC PBE OID translation. Add a EVP_CIPHER ctrl:
   1700      EVP_CTRL_PBE_PRF_NID this allows a cipher to specify an alternative
   1701      PRF which will be automatically used with PBES2.
   1702      [Steve Henson]
   1704   *) Replace the algorithm specific calls to generate keys in "req" with the
   1705      new API.
   1706      [Steve Henson]
   1708   *) Update PKCS#7 enveloped data routines to use new API. This is now
   1709      supported by any public key method supporting the encrypt operation. A
   1710      ctrl is added to allow the public key algorithm to examine or modify
   1711      the PKCS#7 RecipientInfo structure if it needs to: for RSA this is
   1712      a no op.
   1713      [Steve Henson]
   1715   *) Add a ctrl to asn1 method to allow a public key algorithm to express
   1716      a default digest type to use. In most cases this will be SHA1 but some
   1717      algorithms (such as GOST) need to specify an alternative digest. The
   1718      return value indicates how strong the prefernce is 1 means optional and
   1719      2 is mandatory (that is it is the only supported type). Modify
   1720      ASN1_item_sign() to accept a NULL digest argument to indicate it should
   1721      use the default md. Update openssl utilities to use the default digest
   1722      type for signing if it is not explicitly indicated.
   1723      [Steve Henson]
   1725   *) Use OID cross reference table in ASN1_sign() and ASN1_verify(). New 
   1726      EVP_MD flag EVP_MD_FLAG_PKEY_METHOD_SIGNATURE. This uses the relevant
   1727      signing method from the key type. This effectively removes the link
   1728      between digests and public key types.
   1729      [Steve Henson]
   1731   *) Add an OID cross reference table and utility functions. Its purpose is to
   1732      translate between signature OIDs such as SHA1WithrsaEncryption and SHA1,
   1733      rsaEncryption. This will allow some of the algorithm specific hackery
   1734      needed to use the correct OID to be removed. 
   1735      [Steve Henson]
   1737   *) Remove algorithm specific dependencies when setting PKCS7_SIGNER_INFO
   1738      structures for PKCS7_sign(). They are now set up by the relevant public
   1739      key ASN1 method.
   1740      [Steve Henson]
   1742   *) Add provisional EC pkey method with support for ECDSA and ECDH.
   1743      [Steve Henson]
   1745   *) Add support for key derivation (agreement) in the API, DH method and
   1746      pkeyutl.
   1747      [Steve Henson]
   1749   *) Add DSA pkey method and DH pkey methods, extend DH ASN1 method to support
   1750      public and private key formats. As a side effect these add additional 
   1751      command line functionality not previously available: DSA signatures can be
   1752      generated and verified using pkeyutl and DH key support and generation in
   1753      pkey, genpkey.
   1754      [Steve Henson]
   1756   *) BeOS support.
   1757      [Oliver Tappe <zooey (a] hirschkaefer.de>]
   1759   *) New make target "install_html_docs" installs HTML renditions of the
   1760      manual pages.
   1761      [Oliver Tappe <zooey (a] hirschkaefer.de>]
   1763   *) New utility "genpkey" this is analagous to "genrsa" etc except it can
   1764      generate keys for any algorithm. Extend and update EVP_PKEY_METHOD to
   1765      support key and parameter generation and add initial key generation
   1766      functionality for RSA.
   1767      [Steve Henson]
   1769   *) Add functions for main EVP_PKEY_method operations. The undocumented
   1770      functions EVP_PKEY_{encrypt,decrypt} have been renamed to
   1771      EVP_PKEY_{encrypt,decrypt}_old. 
   1772      [Steve Henson]
   1774   *) Initial definitions for EVP_PKEY_METHOD. This will be a high level public
   1775      key API, doesn't do much yet.
   1776      [Steve Henson]
   1778   *) New function EVP_PKEY_asn1_get0_info() to retrieve information about
   1779      public key algorithms. New option to openssl utility:
   1780      "list-public-key-algorithms" to print out info.
   1781      [Steve Henson]
   1783   *) Implement the Supported Elliptic Curves Extension for
   1784      ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
   1785      [Douglas Stebila]
   1787   *) Don't free up OIDs in OBJ_cleanup() if they are in use by EVP_MD or
   1788      EVP_CIPHER structures to avoid later problems in EVP_cleanup().
   1789      [Steve Henson]
   1791   *) New utilities pkey and pkeyparam. These are similar to algorithm specific
   1792      utilities such as rsa, dsa, dsaparam etc except they process any key
   1793      type.
   1794      [Steve Henson]
   1796   *) Transfer public key printing routines to EVP_PKEY_ASN1_METHOD. New 
   1797      functions EVP_PKEY_print_public(), EVP_PKEY_print_private(),
   1798      EVP_PKEY_print_param() to print public key data from an EVP_PKEY
   1799      structure.
   1800      [Steve Henson]
   1802   *) Initial support for pluggable public key ASN1.
   1803      De-spaghettify the public key ASN1 handling. Move public and private
   1804      key ASN1 handling to a new EVP_PKEY_ASN1_METHOD structure. Relocate
   1805      algorithm specific handling to a single module within the relevant
   1806      algorithm directory. Add functions to allow (near) opaque processing
   1807      of public and private key structures.
   1808      [Steve Henson]
   1810   *) Implement the Supported Point Formats Extension for
   1811      ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
   1812      [Douglas Stebila]
   1814   *) Add initial support for RFC 4279 PSK TLS ciphersuites. Add members
   1815      for the psk identity [hint] and the psk callback functions to the
   1816      SSL_SESSION, SSL and SSL_CTX structure.
   1818      New ciphersuites:
   1819          PSK-RC4-SHA, PSK-3DES-EDE-CBC-SHA, PSK-AES128-CBC-SHA,
   1820          PSK-AES256-CBC-SHA
   1822      New functions:
   1823          SSL_CTX_use_psk_identity_hint
   1824          SSL_get_psk_identity_hint
   1825          SSL_get_psk_identity
   1826          SSL_use_psk_identity_hint
   1828      [Mika Kousa and Pasi Eronen of Nokia Corporation]
   1830   *) Add RFC 3161 compliant time stamp request creation, response generation
   1831      and response verification functionality.
   1832      [Zoltn Glzik <zglozik (a] opentsa.org>, The OpenTSA Project]
   1834   *) Add initial support for TLS extensions, specifically for the server_name
   1835      extension so far.  The SSL_SESSION, SSL_CTX, and SSL data structures now
   1836      have new members for a host name.  The SSL data structure has an
   1837      additional member SSL_CTX *initial_ctx so that new sessions can be
   1838      stored in that context to allow for session resumption, even after the
   1839      SSL has been switched to a new SSL_CTX in reaction to a client's
   1840      server_name extension.
   1842      New functions (subject to change):
   1844          SSL_get_servername()
   1845          SSL_get_servername_type()
   1846          SSL_set_SSL_CTX()
   1848      New CTRL codes and macros (subject to change):
   1851                                  - SSL_CTX_set_tlsext_servername_callback()
   1853                                       - SSL_CTX_set_tlsext_servername_arg()
   1854          SSL_CTRL_SET_TLSEXT_HOSTNAME           - SSL_set_tlsext_host_name()
   1856      openssl s_client has a new '-servername ...' option.
   1858      openssl s_server has new options '-servername_host ...', '-cert2 ...',
   1859      '-key2 ...', '-servername_fatal' (subject to change).  This allows
   1860      testing the HostName extension for a specific single host name ('-cert'
   1861      and '-key' remain fallbacks for handshakes without HostName
   1862      negotiation).  If the unrecogninzed_name alert has to be sent, this by
   1863      default is a warning; it becomes fatal with the '-servername_fatal'
   1864      option.
   1866      [Peter Sylvester,  Remy Allais, Christophe Renou]
   1868   *) Whirlpool hash implementation is added.
   1869      [Andy Polyakov]
   1871   *) BIGNUM code on 64-bit SPARCv9 targets is switched from bn(64,64) to
   1872      bn(64,32). Because of instruction set limitations it doesn't have
   1873      any negative impact on performance. This was done mostly in order
   1874      to make it possible to share assembler modules, such as bn_mul_mont
   1875      implementations, between 32- and 64-bit builds without hassle.
   1876      [Andy Polyakov]
   1878   *) Move code previously exiled into file crypto/ec/ec2_smpt.c
   1879      to ec2_smpl.c, and no longer require the OPENSSL_EC_BIN_PT_COMP
   1880      macro.
   1881      [Bodo Moeller]
   1883   *) New candidate for BIGNUM assembler implementation, bn_mul_mont,
   1884      dedicated Montgomery multiplication procedure, is introduced.
   1885      BN_MONT_CTX is modified to allow bn_mul_mont to reach for higher
   1886      "64-bit" performance on certain 32-bit targets.
   1887      [Andy Polyakov]
   1889   *) New option SSL_OP_NO_COMP to disable use of compression selectively
   1890      in SSL structures. New SSL ctrl to set maximum send fragment size. 
   1891      Save memory by seeting the I/O buffer sizes dynamically instead of
   1892      using the maximum available value.
   1893      [Steve Henson]
   1895   *) New option -V for 'openssl ciphers'. This prints the ciphersuite code
   1896      in addition to the text details.
   1897      [Bodo Moeller]
   1899   *) Very, very preliminary EXPERIMENTAL support for printing of general
   1900      ASN1 structures. This currently produces rather ugly output and doesn't
   1901      handle several customised structures at all.
   1902      [Steve Henson]
   1904   *) Integrated support for PVK file format and some related formats such
   1905      as MS PUBLICKEYBLOB and PRIVATEKEYBLOB. Command line switches to support
   1906      these in the 'rsa' and 'dsa' utilities.
   1907      [Steve Henson]
   1909   *) Support for PKCS#1 RSAPublicKey format on rsa utility command line.
   1910      [Steve Henson]
   1912   *) Remove the ancient ASN1_METHOD code. This was only ever used in one
   1913      place for the (very old) "NETSCAPE" format certificates which are now
   1914      handled using new ASN1 code equivalents.
   1915      [Steve Henson]
   1917   *) Let the TLSv1_method() etc. functions return a 'const' SSL_METHOD
   1918      pointer and make the SSL_METHOD parameter in SSL_CTX_new,
   1919      SSL_CTX_set_ssl_version and SSL_set_ssl_method 'const'.
   1920      [Nils Larsch]
   1922   *) Modify CRL distribution points extension code to print out previously
   1923      unsupported fields. Enhance extension setting code to allow setting of
   1924      all fields.
   1925      [Steve Henson]
   1927   *) Add print and set support for Issuing Distribution Point CRL extension.
   1928      [Steve Henson]
   1930   *) Change 'Configure' script to enable Camellia by default.
   1931      [NTT]
   1933  Changes between 0.9.8m and 0.9.8n [24 Mar 2010]
   1935   *) When rejecting SSL/TLS records due to an incorrect version number, never
   1936      update s->server with a new major version number.  As of
   1937      - OpenSSL 0.9.8m if 'short' is a 16-bit type,
   1938      - OpenSSL 0.9.8f if 'short' is longer than 16 bits,
   1939      the previous behavior could result in a read attempt at NULL when
   1940      receiving specific incorrect SSL/TLS records once record payload
   1941      protection is active.  (CVE-2010-0740)
   1942      [Bodo Moeller, Adam Langley <agl (a] chromium.org>]
   1944   *) Fix for CVE-2010-0433 where some kerberos enabled versions of OpenSSL 
   1945      could be crashed if the relevant tables were not present (e.g. chrooted).
   1946      [Tomas Hoger <thoger (a] redhat.com>]
   1948  Changes between 0.9.8l and 0.9.8m [25 Feb 2010]
   1950   *) Always check bn_wexpend() return values for failure.  (CVE-2009-3245)
   1951      [Martin Olsson, Neel Mehta]
   1953   *) Fix X509_STORE locking: Every 'objs' access requires a lock (to
   1954      accommodate for stack sorting, always a write lock!).
   1955      [Bodo Moeller]
   1957   *) On some versions of WIN32 Heap32Next is very slow. This can cause
   1958      excessive delays in the RAND_poll(): over a minute. As a workaround
   1959      include a time check in the inner Heap32Next loop too.
   1960      [Steve Henson]
   1962   *) The code that handled flushing of data in SSL/TLS originally used the
   1963      BIO_CTRL_INFO ctrl to see if any data was pending first. This caused
   1964      the problem outlined in PR#1949. The fix suggested there however can
   1965      trigger problems with buggy BIO_CTRL_WPENDING (e.g. some versions
   1966      of Apache). So instead simplify the code to flush unconditionally.
   1967      This should be fine since flushing with no data to flush is a no op.
   1968      [Steve Henson]
   1970   *) Handle TLS versions 2.0 and later properly and correctly use the
   1971      highest version of TLS/SSL supported. Although TLS >= 2.0 is some way
   1972      off ancient servers have a habit of sticking around for a while...
   1973      [Steve Henson]
   1975   *) Modify compression code so it frees up structures without using the
   1976      ex_data callbacks. This works around a problem where some applications
   1977      call CRYPTO_cleanup_all_ex_data() before application exit (e.g. when
   1978      restarting) then use compression (e.g. SSL with compression) later.
   1979      This results in significant per-connection memory leaks and
   1980      has caused some security issues including CVE-2008-1678 and
   1981      CVE-2009-4355.
   1982      [Steve Henson]
   1984   *) Constify crypto/cast (i.e., <openssl/cast.h>): a CAST_KEY doesn't
   1985      change when encrypting or decrypting.
   1986      [Bodo Moeller]
   1988   *) Add option SSL_OP_LEGACY_SERVER_CONNECT which will allow clients to
   1989      connect and renegotiate with servers which do not support RI.
   1990      Until RI is more widely deployed this option is enabled by default.
   1991      [Steve Henson]
   1993   *) Add "missing" ssl ctrls to clear options and mode.
   1994      [Steve Henson]
   1996   *) If client attempts to renegotiate and doesn't support RI respond with
   1997      a no_renegotiation alert as required by RFC5746.  Some renegotiating
   1998      TLS clients will continue a connection gracefully when they receive
   1999      the alert. Unfortunately OpenSSL mishandled this alert and would hang
   2000      waiting for a server hello which it will never receive. Now we treat a
   2001      received no_renegotiation alert as a fatal error. This is because
   2002      applications requesting a renegotiation might well expect it to succeed
   2003      and would have no code in place to handle the server denying it so the
   2004      only safe thing to do is to terminate the connection.
   2005      [Steve Henson]
   2007   *) Add ctrl macro SSL_get_secure_renegotiation_support() which returns 1 if
   2008      peer supports secure renegotiation and 0 otherwise. Print out peer
   2009      renegotiation support in s_client/s_server.
   2010      [Steve Henson]
   2012   *) Replace the highly broken and deprecated SPKAC certification method with
   2013      the updated NID creation version. This should correctly handle UTF8.
   2014      [Steve Henson]
   2016   *) Implement RFC5746. Re-enable renegotiation but require the extension
   2017      as needed. Unfortunately, SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
   2018      turns out to be a bad idea. It has been replaced by
   2019      SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION which can be set with
   2020      SSL_CTX_set_options(). This is really not recommended unless you
   2021      know what you are doing.
   2022      [Eric Rescorla <ekr (a] networkresonance.com>, Ben Laurie, Steve Henson]
   2024   *) Fixes to stateless session resumption handling. Use initial_ctx when
   2025      issuing and attempting to decrypt tickets in case it has changed during
   2026      servername handling. Use a non-zero length session ID when attempting
   2027      stateless session resumption: this makes it possible to determine if
   2028      a resumption has occurred immediately after receiving server hello
   2029      (several places in OpenSSL subtly assume this) instead of later in
   2030      the handshake.
   2031      [Steve Henson]
   2033   *) The functions ENGINE_ctrl(), OPENSSL_isservice(),
   2034      CMS_get1_RecipientRequest() and RAND_bytes() can return <=0 on error
   2035      fixes for a few places where the return code is not checked
   2036      correctly.
   2037      [Julia Lawall <julia (a] diku.dk>]
   2039   *) Add --strict-warnings option to Configure script to include devteam
   2040      warnings in other configurations.
   2041      [Steve Henson]
   2043   *) Add support for --libdir option and LIBDIR variable in makefiles. This
   2044      makes it possible to install openssl libraries in locations which
   2045      have names other than "lib", for example "/usr/lib64" which some
   2046      systems need.
   2047      [Steve Henson, based on patch from Jeremy Utley]
   2049   *) Don't allow the use of leading 0x80 in OIDs. This is a violation of
   2050      X690 8.9.12 and can produce some misleading textual output of OIDs.
   2051      [Steve Henson, reported by Dan Kaminsky]
   2053   *) Delete MD2 from algorithm tables. This follows the recommendation in
   2054      several standards that it is not used in new applications due to
   2055      several cryptographic weaknesses. For binary compatibility reasons
   2056      the MD2 API is still compiled in by default.
   2057      [Steve Henson]
   2059   *) Add compression id to {d2i,i2d}_SSL_SESSION so it is correctly saved
   2060      and restored.
   2061      [Steve Henson]
   2063   *) Rename uni2asc and asc2uni functions to OPENSSL_uni2asc and
   2064      OPENSSL_asc2uni conditionally on Netware platforms to avoid a name
   2065      clash.
   2066      [Guenter <lists (a] gknw.net>]
   2068   *) Fix the server certificate chain building code to use X509_verify_cert(),
   2069      it used to have an ad-hoc builder which was unable to cope with anything
   2070      other than a simple chain.
   2071      [David Woodhouse <dwmw2 (a] infradead.org>, Steve Henson]
   2073   *) Don't check self signed certificate signatures in X509_verify_cert()
   2074      by default (a flag can override this): it just wastes time without
   2075      adding any security. As a useful side effect self signed root CAs
   2076      with non-FIPS digests are now usable in FIPS mode.
   2077      [Steve Henson]
   2079   *) In dtls1_process_out_of_seq_message() the check if the current message
   2080      is already buffered was missing. For every new message was memory
   2081      allocated, allowing an attacker to perform an denial of service attack
   2082      with sending out of seq handshake messages until there is no memory
   2083      left. Additionally every future messege was buffered, even if the
   2084      sequence number made no sense and would be part of another handshake.
   2085      So only messages with sequence numbers less than 10 in advance will be
   2086      buffered.  (CVE-2009-1378)
   2087      [Robin Seggelmann, discovered by Daniel Mentz] 	
   2089   *) Records are buffered if they arrive with a future epoch to be
   2090      processed after finishing the corresponding handshake. There is
   2091      currently no limitation to this buffer allowing an attacker to perform
   2092      a DOS attack with sending records with future epochs until there is no
   2093      memory left. This patch adds the pqueue_size() function to detemine
   2094      the size of a buffer and limits the record buffer to 100 entries.
   2095      (CVE-2009-1377)
   2096      [Robin Seggelmann, discovered by Daniel Mentz] 	
   2098   *) Keep a copy of frag->msg_header.frag_len so it can be used after the
   2099      parent structure is freed.  (CVE-2009-1379)
   2100      [Daniel Mentz] 	
   2102   *) Handle non-blocking I/O properly in SSL_shutdown() call.
   2103      [Darryl Miles <darryl-mailinglists (a] netbauds.net>]
   2105   *) Add 2.5.4.* OIDs
   2106      [Ilya O. <vrghost (a] gmail.com>]
   2108  Changes between 0.9.8k and 0.9.8l  [5 Nov 2009]
   2110   *) Disable renegotiation completely - this fixes a severe security
   2111      problem (CVE-2009-3555) at the cost of breaking all
   2112      renegotiation. Renegotiation can be re-enabled by setting
   2114      run-time. This is really not recommended unless you know what
   2115      you're doing.
   2116      [Ben Laurie]
   2118  Changes between 0.9.8j and 0.9.8k  [25 Mar 2009]
   2120   *) Don't set val to NULL when freeing up structures, it is freed up by
   2121      underlying code. If sizeof(void *) > sizeof(long) this can result in
   2122      zeroing past the valid field. (CVE-2009-0789)
   2123      [Paolo Ganci <Paolo.Ganci (a] AdNovum.CH>]
   2125   *) Fix bug where return value of CMS_SignerInfo_verify_content() was not
   2126      checked correctly. This would allow some invalid signed attributes to
   2127      appear to verify correctly. (CVE-2009-0591)
   2128      [Ivan Nestlerode <inestlerode (a] us.ibm.com>]
   2130   *) Reject UniversalString and BMPString types with invalid lengths. This
   2131      prevents a crash in ASN1_STRING_print_ex() which assumes the strings have
   2132      a legal length. (CVE-2009-0590)
   2133      [Steve Henson]
   2135   *) Set S/MIME signing as the default purpose rather than setting it 
   2136      unconditionally. This allows applications to override it at the store
   2137      level.
   2138      [Steve Henson]
   2140   *) Permit restricted recursion of ASN1 strings. This is needed in practice
   2141      to handle some structures.
   2142      [Steve Henson]
   2144   *) Improve efficiency of mem_gets: don't search whole buffer each time
   2145      for a '\n'
   2146      [Jeremy Shapiro <jnshapir (a] us.ibm.com>]
   2148   *) New -hex option for openssl rand.
   2149      [Matthieu Herrb]
   2151   *) Print out UTF8String and NumericString when parsing ASN1.
   2152      [Steve Henson]
   2154   *) Support NumericString type for name components.
   2155      [Steve Henson]
   2157   *) Allow CC in the environment to override the automatically chosen
   2158      compiler. Note that nothing is done to ensure flags work with the
   2159      chosen compiler.
   2160      [Ben Laurie]
   2162  Changes between 0.9.8i and 0.9.8j  [07 Jan 2009]
   2164   *) Properly check EVP_VerifyFinal() and similar return values
   2165      (CVE-2008-5077).
   2166      [Ben Laurie, Bodo Moeller, Google Security Team]
   2168   *) Enable TLS extensions by default.
   2169      [Ben Laurie]
   2171   *) Allow the CHIL engine to be loaded, whether the application is
   2172      multithreaded or not. (This does not release the developer from the
   2173      obligation to set up the dynamic locking callbacks.)
   2174      [Sander Temme <sander (a] temme.net>]
   2176   *) Use correct exit code if there is an error in dgst command.
   2177      [Steve Henson; problem pointed out by Roland Dirlewanger]
   2179   *) Tweak Configure so that you need to say "experimental-jpake" to enable
   2180      JPAKE, and need to use -DOPENSSL_EXPERIMENTAL_JPAKE in applications.
   2181      [Bodo Moeller]
   2183   *) Add experimental JPAKE support, including demo authentication in
   2184      s_client and s_server.
   2185      [Ben Laurie]
   2187   *) Set the comparison function in v3_addr_canonize().
   2188      [Rob Austein <sra (a] hactrn.net>]
   2190   *) Add support for XMPP STARTTLS in s_client.
   2191      [Philip Paeps <philip (a] freebsd.org>]
   2193   *) Change the server-side SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG behavior
   2194      to ensure that even with this option, only ciphersuites in the
   2195      server's preference list will be accepted.  (Note that the option
   2196      applies only when resuming a session, so the earlier behavior was
   2197      just about the algorithm choice for symmetric cryptography.)
   2198      [Bodo Moeller]
   2200  Changes between 0.9.8h and 0.9.8i  [15 Sep 2008]
   2202   *) Fix NULL pointer dereference if a DTLS server received
   2203      ChangeCipherSpec as first record (CVE-2009-1386).
   2204      [PR #1679]
   2206   *) Fix a state transitition in s3_srvr.c and d1_srvr.c
   2207      (was using SSL3_ST_CW_CLNT_HELLO_B, should be ..._ST_SW_SRVR_...).
   2208      [Nagendra Modadugu]
   2210   *) The fix in 0.9.8c that supposedly got rid of unsafe
   2211      double-checked locking was incomplete for RSA blinding,
   2212      addressing just one layer of what turns out to have been
   2213      doubly unsafe triple-checked locking.
   2215      So now fix this for real by retiring the MONT_HELPER macro
   2216      in crypto/rsa/rsa_eay.c.
   2218      [Bodo Moeller; problem pointed out by Marius Schilder]
   2220   *) Various precautionary measures:
   2222      - Avoid size_t integer overflow in HASH_UPDATE (md32_common.h).
   2224      - Avoid a buffer overflow in d2i_SSL_SESSION() (ssl_asn1.c).
   2225        (NB: This would require knowledge of the secret session ticket key
   2226        to exploit, in which case you'd be SOL either way.)
   2228      - Change bn_nist.c so that it will properly handle input BIGNUMs
   2229        outside the expected range.
   2231      - Enforce the 'num' check in BN_div() (bn_div.c) for non-BN_DEBUG
   2232        builds.
   2234      [Neel Mehta, Bodo Moeller]
   2236   *) Allow engines to be "soft loaded" - i.e. optionally don't die if
   2237      the load fails. Useful for distros.
   2238      [Ben Laurie and the FreeBSD team]
   2240   *) Add support for Local Machine Keyset attribute in PKCS#12 files.
   2241      [Steve Henson]
   2243   *) Fix BN_GF2m_mod_arr() top-bit cleanup code.
   2244      [Huang Ying]
   2246   *) Expand ENGINE to support engine supplied SSL client certificate functions.
   2248      This work was sponsored by Logica.
   2249      [Steve Henson]
   2251   *) Add CryptoAPI ENGINE to support use of RSA and DSA keys held in Windows
   2252      keystores. Support for SSL/TLS client authentication too.
   2253      Not compiled unless enable-capieng specified to Configure.
   2255      This work was sponsored by Logica.
   2256      [Steve Henson]
   2258   *) Fix bug in X509_ATTRIBUTE creation: dont set attribute using
   2259      ASN1_TYPE_set1 if MBSTRING flag set. This bug would crash certain
   2260      attribute creation routines such as certifcate requests and PKCS#12
   2261      files.
   2262      [Steve Henson]
   2264  Changes between 0.9.8g and 0.9.8h  [28 May 2008]
   2266   *) Fix flaw if 'Server Key exchange message' is omitted from a TLS
   2267      handshake which could lead to a cilent crash as found using the
   2268      Codenomicon TLS test suite (CVE-2008-1672) 
   2269      [Steve Henson, Mark Cox]
   2271   *) Fix double free in TLS server name extensions which could lead to
   2272      a remote crash found by Codenomicon TLS test suite (CVE-2008-0891) 
   2273      [Joe Orton]
   2275   *) Clear error queue in SSL_CTX_use_certificate_chain_file()
   2277      Clear the error queue to ensure that error entries left from
   2278      older function calls do not interfere with the correct operation.
   2279      [Lutz Jaenicke, Erik de Castro Lopo]
   2281   *) Remove root CA certificates of commercial CAs:
   2283      The OpenSSL project does not recommend any specific CA and does not
   2284      have any policy with respect to including or excluding any CA.
   2285      Therefore it does not make any sense to ship an arbitrary selection
   2286      of root CA certificates with the OpenSSL software.
   2287      [Lutz Jaenicke]
   2289   *) RSA OAEP patches to fix two separate invalid memory reads.
   2290      The first one involves inputs when 'lzero' is greater than
   2291      'SHA_DIGEST_LENGTH' (it would read about SHA_DIGEST_LENGTH bytes
   2292      before the beginning of from). The second one involves inputs where
   2293      the 'db' section contains nothing but zeroes (there is a one-byte
   2294      invalid read after the end of 'db').
   2295      [Ivan Nestlerode <inestlerode (a] us.ibm.com>]
   2297   *) Partial backport from 0.9.9-dev:
   2299      Introduce bn_mul_mont (dedicated Montgomery multiplication
   2300      procedure) as a candidate for BIGNUM assembler implementation.
   2301      While 0.9.9-dev uses assembler for various architectures, only
   2302      x86_64 is available by default here in the 0.9.8 branch, and
   2303      32-bit x86 is available through a compile-time setting.
   2305      To try the 32-bit x86 assembler implementation, use Configure
   2306      option "enable-montasm" (which exists only for this backport).
   2308      As "enable-montasm" for 32-bit x86 disclaims code stability
   2309      anyway, in this constellation we activate additional code
   2310      backported from 0.9.9-dev for further performance improvements,
   2311      namely BN_from_montgomery_word.  (To enable this otherwise,
   2312      e.g. x86_64, try "-DMONT_FROM_WORD___NON_DEFAULT_0_9_8_BUILD".)
   2314      [Andy Polyakov (backport partially by Bodo Moeller)]
   2316   *) Add TLS session ticket callback. This allows an application to set
   2317      TLS ticket cipher and HMAC keys rather than relying on hardcoded fixed
   2318      values. This is useful for key rollover for example where several key
   2319      sets may exist with different names.
   2320      [Steve Henson]
   2322   *) Reverse ENGINE-internal logic for caching default ENGINE handles.
   2323      This was broken until now in 0.9.8 releases, such that the only way
   2324      a registered ENGINE could be used (assuming it initialises
   2325      successfully on the host) was to explicitly set it as the default
   2326      for the relevant algorithms. This is in contradiction with 0.9.7
   2327      behaviour and the documentation. With this fix, when an ENGINE is
   2328      registered into a given algorithm's table of implementations, the
   2329      'uptodate' flag is reset so that auto-discovery will be used next
   2330      time a new context for that algorithm attempts to select an
   2331      implementation.
   2332      [Ian Lister (tweaked by Geoff Thorpe)]
   2334   *) Backport of CMS code to OpenSSL 0.9.8. This differs from the 0.9.9
   2335      implemention in the following ways:
   2337      Lack of EVP_PKEY_ASN1_METHOD means algorithm parameters have to be
   2338      hard coded.
   2340      Lack of BER streaming support means one pass streaming processing is
   2341      only supported if data is detached: setting the streaming flag is
   2342      ignored for embedded content.
   2344      CMS support is disabled by default and must be explicitly enabled
   2345      with the enable-cms configuration option.
   2346      [Steve Henson]
   2348   *) Update the GMP engine glue to do direct copies between BIGNUM and
   2349      mpz_t when openssl and GMP use the same limb size. Otherwise the
   2350      existing "conversion via a text string export" trick is still used.
   2351      [Paul Sheer <paulsheer (a] gmail.com>]
   2353   *) Zlib compression BIO. This is a filter BIO which compressed and
   2354      uncompresses any data passed through it.
   2355      [Steve Henson]
   2357   *) Add AES_wrap_key() and AES_unwrap_key() functions to implement
   2358      RFC3394 compatible AES key wrapping.
   2359      [Steve Henson]
   2361   *) Add utility functions to handle ASN1 structures. ASN1_STRING_set0():
   2362      sets string data without copying. X509_ALGOR_set0() and
   2363      X509_ALGOR_get0(): set and retrieve X509_ALGOR (AlgorithmIdentifier)
   2364      data. Attribute function X509at_get0_data_by_OBJ(): retrieves data
   2365      from an X509_ATTRIBUTE structure optionally checking it occurs only
   2366      once. ASN1_TYPE_set1(): set and ASN1_TYPE structure copying supplied
   2367      data.
   2368      [Steve Henson]
   2370   *) Fix BN flag handling in RSA_eay_mod_exp() and BN_MONT_CTX_set()
   2371      to get the expected BN_FLG_CONSTTIME behavior.
   2372      [Bodo Moeller (Google)]
   2374   *) Netware support:
   2376      - fixed wrong usage of ioctlsocket() when build for LIBC BSD sockets
   2377      - fixed do_tests.pl to run the test suite with CLIB builds too (CLIB_OPT)
   2378      - added some more tests to do_tests.pl
   2379      - fixed RunningProcess usage so that it works with newer LIBC NDKs too
   2380      - removed usage of BN_LLONG for CLIB builds to avoid runtime dependency
   2381      - added new Configure targets netware-clib-bsdsock, netware-clib-gcc,
   2382        netware-clib-bsdsock-gcc, netware-libc-bsdsock-gcc
   2383      - various changes to netware.pl to enable gcc-cross builds on Win32
   2384        platform
   2385      - changed crypto/bio/b_sock.c to work with macro functions (CLIB BSD)
   2386      - various changes to fix missing prototype warnings
   2387      - fixed x86nasm.pl to create correct asm files for NASM COFF output
   2388      - added AES, WHIRLPOOL and CPUID assembler code to build files
   2389      - added missing AES assembler make rules to mk1mf.pl
   2390      - fixed order of includes in apps/ocsp.c so that e_os.h settings apply
   2391      [Guenter Knauf <eflash (a] gmx.net>]
   2393   *) Implement certificate status request TLS extension defined in RFC3546.
   2394      A client can set the appropriate parameters and receive the encoded
   2395      OCSP response via a callback. A server can query the supplied parameters
   2396      and set the encoded OCSP response in the callback. Add simplified examples
   2397      to s_client and s_server.
   2398      [Steve Henson]
   2400  Changes between 0.9.8f and 0.9.8g  [19 Oct 2007]
   2402   *) Fix various bugs:
   2403      + Binary incompatibility of ssl_ctx_st structure
   2404      + DTLS interoperation with non-compliant servers
   2405      + Don't call get_session_cb() without proposed session
   2406      + Fix ia64 assembler code
   2407      [Andy Polyakov, Steve Henson]
   2409  Changes between 0.9.8e and 0.9.8f  [11 Oct 2007]
   2411   *) DTLS Handshake overhaul. There were longstanding issues with
   2412      OpenSSL DTLS implementation, which were making it impossible for
   2413      RFC 4347 compliant client to communicate with OpenSSL server.
   2414      Unfortunately just fixing these incompatibilities would "cut off"
   2415      pre-0.9.8f clients. To allow for hassle free upgrade post-0.9.8e
   2416      server keeps tolerating non RFC compliant syntax. The opposite is
   2417      not true, 0.9.8f client can not communicate with earlier server.
   2418      This update even addresses CVE-2007-4995.
   2419      [Andy Polyakov]
   2421   *) Changes to avoid need for function casts in OpenSSL: some compilers
   2422      (gcc 4.2 and later) reject their use.
   2423      [Kurt Roeckx <kurt (a] roeckx.be>, Peter Hartley <pdh (a] utter.chaos.org.uk>,
   2424       Steve Henson]
   2426   *) Add RFC4507 support to OpenSSL. This includes the corrections in
   2427      RFC4507bis. The encrypted ticket format is an encrypted encoded
   2428      SSL_SESSION structure, that way new session features are automatically
   2429      supported.
   2431      If a client application caches session in an SSL_SESSION structure
   2432      support is transparent because tickets are now stored in the encoded
   2433      SSL_SESSION.
   2435      The SSL_CTX structure automatically generates keys for ticket
   2436      protection in servers so again support should be possible
   2437      with no application modification.
   2439      If a client or server wishes to disable RFC4507 support then the option
   2440      SSL_OP_NO_TICKET can be set.
   2442      Add a TLS extension debugging callback to allow the contents of any client
   2443      or server extensions to be examined.
   2445      This work was sponsored by Google.
   2446      [Steve Henson]
   2448   *) Add initial support for TLS extensions, specifically for the server_name
   2449      extension so far.  The SSL_SESSION, SSL_CTX, and SSL data structures now
   2450      have new members for a host name.  The SSL data structure has an
   2451      additional member SSL_CTX *initial_ctx so that new sessions can be
   2452      stored in that context to allow for session resumption, even after the
   2453      SSL has been switched to a new SSL_CTX in reaction to a client's
   2454      server_name extension.
   2456      New functions (subject to change):
   2458          SSL_get_servername()
   2459          SSL_get_servername_type()
   2460          SSL_set_SSL_CTX()
   2462      New CTRL codes and macros (subject to change):
   2465                                  - SSL_CTX_set_tlsext_servername_callback()
   2467                                       - SSL_CTX_set_tlsext_servername_arg()
   2468          SSL_CTRL_SET_TLSEXT_HOSTNAME           - SSL_set_tlsext_host_name()
   2470      openssl s_client has a new '-servername ...' option.
   2472      openssl s_server has new options '-servername_host ...', '-cert2 ...',
   2473      '-key2 ...', '-servername_fatal' (subject to change).  This allows
   2474      testing the HostName extension for a specific single host name ('-cert'
   2475      and '-key' remain fallbacks for handshakes without HostName
   2476      negotiation).  If the unrecogninzed_name alert has to be sent, this by
   2477      default is a warning; it becomes fatal with the '-servername_fatal'
   2478      option.
   2480      [Peter Sylvester,  Remy Allais, Christophe Renou, Steve Henson]
   2482   *) Add AES and SSE2 assembly language support to VC++ build.
   2483      [Steve Henson]
   2485   *) Mitigate attack on final subtraction in Montgomery reduction.
   2486      [Andy Polyakov]
   2488   *) Fix crypto/ec/ec_mult.c to work properly with scalars of value 0
   2489      (which previously caused an internal error).
   2490      [Bodo Moeller]
   2492   *) Squeeze another 10% out of IGE mode when in != out.
   2493      [Ben Laurie]
   2495   *) AES IGE mode speedup.
   2496      [Dean Gaudet (Google)]
   2498   *) Add the Korean symmetric 128-bit cipher SEED (see
   2499      http://www.kisa.or.kr/kisa/seed/jsp/seed_eng.jsp) and
   2500      add SEED ciphersuites from RFC 4162:
   2502         TLS_RSA_WITH_SEED_CBC_SHA      =  "SEED-SHA"
   2505         TLS_DH_anon_WITH_SEED_CBC_SHA  =  "ADH-SEED-SHA"
   2507      To minimize changes between patchlevels in the OpenSSL 0.9.8
   2508      series, SEED remains excluded from compilation unless OpenSSL
   2509      is configured with 'enable-seed'.
   2510      [KISA, Bodo Moeller]
   2512   *) Mitigate branch prediction attacks, which can be practical if a
   2513      single processor is shared, allowing a spy process to extract
   2514      information.  For detailed background information, see
   2515      http://eprint.iacr.org/2007/039 (O. Aciicmez, S. Gueron,
   2516      J.-P. Seifert, "New Branch Prediction Vulnerabilities in OpenSSL
   2517      and Necessary Software Countermeasures").  The core of the change
   2518      are new versions BN_div_no_branch() and
   2519      BN_mod_inverse_no_branch() of BN_div() and BN_mod_inverse(),
   2520      respectively, which are slower, but avoid the security-relevant
   2521      conditional branches.  These are automatically called by BN_div()
   2522      and BN_mod_inverse() if the flag BN_FLG_CONSTTIME is set for one
   2523      of the input BIGNUMs.  Also, BN_is_bit_set() has been changed to
   2524      remove a conditional branch.
   2526      BN_FLG_CONSTTIME is the new name for the previous
   2527      BN_FLG_EXP_CONSTTIME flag, since it now affects more than just
   2528      modular exponentiation.  (Since OpenSSL 0.9.7h, setting this flag
   2529      in the exponent causes BN_mod_exp_mont() to use the alternative
   2530      implementation in BN_mod_exp_mont_consttime().)  The old name
   2531      remains as a deprecated alias.
   2533      Similary, RSA_FLAG_NO_EXP_CONSTTIME is replaced by a more general
   2534      RSA_FLAG_NO_CONSTTIME flag since the RSA implementation now uses
   2535      constant-time implementations for more than just exponentiation.
   2536      Here too the old name is kept as a deprecated alias.
   2538      BN_BLINDING_new() will now use BN_dup() for the modulus so that
   2539      the BN_BLINDING structure gets an independent copy of the
   2540      modulus.  This means that the previous "BIGNUM *m" argument to
   2541      BN_BLINDING_new() and to BN_BLINDING_create_param() now
   2542      essentially becomes "const BIGNUM *m", although we can't actually
   2543      change this in the header file before 0.9.9.  It allows
   2544      RSA_setup_blinding() to use BN_with_flags() on the modulus to
   2545      enable BN_FLG_CONSTTIME.
   2547      [Matthew D Wood (Intel Corp)]
   2549   *) In the SSL/TLS server implementation, be strict about session ID
   2550      context matching (which matters if an application uses a single
   2551      external cache for different purposes).  Previously,
   2552      out-of-context reuse was forbidden only if SSL_VERIFY_PEER was
   2553      set.  This did ensure strict client verification, but meant that,
   2554      with applications using a single external cache for quite
   2555      different requirements, clients could circumvent ciphersuite
   2556      restrictions for a given session ID context by starting a session
   2557      in a different context.
   2558      [Bodo Moeller]
   2560   *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
   2561      a ciphersuite string such as "DEFAULT:RSA" cannot enable
   2562      authentication-only ciphersuites.
   2563      [Bodo Moeller]
   2565   *) Update the SSL_get_shared_ciphers() fix CVE-2006-3738 which was
   2566      not complete and could lead to a possible single byte overflow
   2567      (CVE-2007-5135) [Ben Laurie]
   2569  Changes between 0.9.8d and 0.9.8e  [23 Feb 2007]
   2571   *) Since AES128 and AES256 (and similarly Camellia128 and
   2572      Camellia256) share a single mask bit in the logic of
   2573      ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
   2574      kludge to work properly if AES128 is available and AES256 isn't
   2575      (or if Camellia128 is available and Camellia256 isn't).
   2576      [Victor Duchovni]
   2578   *) Fix the BIT STRING encoding generated by crypto/ec/ec_asn1.c
   2579      (within i2d_ECPrivateKey, i2d_ECPKParameters, i2d_ECParameters):
   2580      When a point or a seed is encoded in a BIT STRING, we need to
   2581      prevent the removal of trailing zero bits to get the proper DER
   2582      encoding.  (By default, crypto/asn1/a_bitstr.c assumes the case
   2583      of a NamedBitList, for which trailing 0 bits need to be removed.)
   2584      [Bodo Moeller]
   2586   *) Have SSL/TLS server implementation tolerate "mismatched" record
   2587      protocol version while receiving ClientHello even if the
   2588      ClientHello is fragmented.  (The server can't insist on the
   2589      particular protocol version it has chosen before the ServerHello
   2590      message has informed the client about his choice.)
   2591      [Bodo Moeller]
   2593   *) Add RFC 3779 support.
   2594      [Rob Austein for ARIN, Ben Laurie]
   2596   *) Load error codes if they are not already present instead of using a
   2597      static variable. This allows them to be cleanly unloaded and reloaded.
   2598      Improve header file function name parsing.
   2599      [Steve Henson]
   2601   *) extend SMTP and IMAP protocol emulation in s_client to use EHLO
   2602      or CAPABILITY handshake as required by RFCs.
   2603      [Goetz Babin-Ebell]
   2605  Changes between 0.9.8c and 0.9.8d  [28 Sep 2006]
   2607   *) Introduce limits to prevent malicious keys being able to
   2608      cause a denial of service.  (CVE-2006-2940)
   2609      [Steve Henson, Bodo Moeller]
   2611   *) Fix ASN.1 parsing of certain invalid structures that can result
   2612      in a denial of service.  (CVE-2006-2937)  [Steve Henson]
   2614   *) Fix buffer overflow in SSL_get_shared_ciphers() function. 
   2615      (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
   2617   *) Fix SSL client code which could crash if connecting to a
   2618      malicious SSLv2 server.  (CVE-2006-4343)
   2619      [Tavis Ormandy and Will Drewry, Google Security Team]
   2621   *) Since 0.9.8b, ciphersuite strings naming explicit ciphersuites
   2622      match only those.  Before that, "AES256-SHA" would be interpreted
   2623      as a pattern and match "AES128-SHA" too (since AES128-SHA got
   2624      the same strength classification in 0.9.7h) as we currently only
   2625      have a single AES bit in the ciphersuite description bitmap.
   2626      That change, however, also applied to ciphersuite strings such as
   2627      "RC4-MD5" that intentionally matched multiple ciphersuites --
   2628      namely, SSL 2.0 ciphersuites in addition to the more common ones
   2629      from SSL 3.0/TLS 1.0.
   2631      So we change the selection algorithm again: Naming an explicit
   2632      ciphersuite selects this one ciphersuite, and any other similar
   2633      ciphersuite (same bitmap) from *other* protocol versions.
   2634      Thus, "RC4-MD5" again will properly select both the SSL 2.0
   2635      ciphersuite and the SSL 3.0/TLS 1.0 ciphersuite.
   2637      Since SSL 2.0 does not have any ciphersuites for which the
   2638      128/256 bit distinction would be relevant, this works for now.
   2639      The proper fix will be to use different bits for AES128 and
   2640      AES256, which would have avoided the problems from the beginning;
   2641      however, bits are scarce, so we can only do this in a new release
   2642      (not just a patchlevel) when we can change the SSL_CIPHER
   2643      definition to split the single 'unsigned long mask' bitmap into
   2644      multiple values to extend the available space.
   2646      [Bodo Moeller]
   2648  Changes between 0.9.8b and 0.9.8c  [05 Sep 2006]
   2650   *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
   2651      (CVE-2006-4339)  [Ben Laurie and Google Security Team]
   2653   *) Add AES IGE and biIGE modes.
   2654      [Ben Laurie]
   2656   *) Change the Unix randomness entropy gathering to use poll() when
   2657      possible instead of select(), since the latter has some
   2658      undesirable limitations.
   2659      [Darryl Miles via Richard Levitte and Bodo Moeller]
   2661   *) Disable "ECCdraft" ciphersuites more thoroughly.  Now special
   2662      treatment in ssl/ssl_ciph.s makes sure that these ciphersuites
   2663      cannot be implicitly activated as part of, e.g., the "AES" alias.
   2664      However, please upgrade to OpenSSL 0.9.9[-dev] for
   2665      non-experimental use of the ECC ciphersuites to get TLS extension
   2666      support, which is required for curve and point format negotiation
   2667      to avoid potential handshake problems.
   2668      [Bodo Moeller]
   2670   *) Disable rogue ciphersuites:
   2672       - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
   2673       - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
   2674       - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
   2676      The latter two were purportedly from
   2677      draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
   2678      appear there.
   2680      Also deactivate the remaining ciphersuites from
   2681      draft-ietf-tls-56-bit-ciphersuites-01.txt.  These are just as
   2682      unofficial, and the ID has long expired.
   2683      [Bodo Moeller]
   2685   *) Fix RSA blinding Heisenbug (problems sometimes occured on
   2686      dual-core machines) and other potential thread-safety issues.
   2687      [Bodo Moeller]
   2689   *) Add the symmetric cipher Camellia (128-bit, 192-bit, 256-bit key
   2690      versions), which is now available for royalty-free use
   2691      (see http://info.isl.ntt.co.jp/crypt/eng/info/chiteki.html).
   2692      Also, add Camellia TLS ciphersuites from RFC 4132.
   2694      To minimize changes between patchlevels in the OpenSSL 0.9.8
   2695      series, Camellia remains excluded from compilation unless OpenSSL
   2696      is configured with 'enable-camellia'.
   2697      [NTT]
   2699   *) Disable the padding bug check when compression is in use. The padding
   2700      bug check assumes the first packet is of even length, this is not
   2701      necessarily true if compresssion is enabled and can result in false
   2702      positives causing handshake failure. The actual bug test is ancient
   2703      code so it is hoped that implementations will either have fixed it by
   2704      now or any which still have the bug do not support compression.
   2705      [Steve Henson]
   2707  Changes between 0.9.8a and 0.9.8b  [04 May 2006]
   2709   *) When applying a cipher rule check to see if string match is an explicit
   2710      cipher suite and only match that one cipher suite if it is.
   2711      [Steve Henson]
   2713   *) Link in manifests for VC++ if needed.
   2714      [Austin Ziegler <halostatue (a] gmail.com>]
   2716   *) Update support for ECC-based TLS ciphersuites according to
   2717      draft-ietf-tls-ecc-12.txt with proposed changes (but without
   2718      TLS extensions, which are supported starting with the 0.9.9
   2719      branch, not in the OpenSSL 0.9.8 branch).
   2720      [Douglas Stebila]
   2722   *) New functions EVP_CIPHER_CTX_new() and EVP_CIPHER_CTX_free() to support
   2723      opaque EVP_CIPHER_CTX handling.
   2724      [Steve Henson]
   2726   *) Fixes and enhancements to zlib compression code. We now only use
   2727      "zlib1.dll" and use the default __cdecl calling convention on Win32
   2728      to conform with the standards mentioned here:
   2729            http://www.zlib.net/DLL_FAQ.txt
   2730      Static zlib linking now works on Windows and the new --with-zlib-include
   2731      --with-zlib-lib options to Configure can be used to supply the location
   2732      of the headers and library. Gracefully handle case where zlib library
   2733      can't be loaded.
   2734      [Steve Henson]
   2736   *) Several fixes and enhancements to the OID generation code. The old code
   2737      sometimes allowed invalid OIDs (1.X for X >= 40 for example), couldn't
   2738      handle numbers larger than ULONG_MAX, truncated printing and had a
   2739      non standard OBJ_obj2txt() behaviour.
   2740      [Steve Henson]
   2742   *) Add support for building of engines under engine/ as shared libraries
   2743      under VC++ build system.
   2744      [Steve Henson]
   2746   *) Corrected the numerous bugs in the Win32 path splitter in DSO.
   2747      Hopefully, we will not see any false combination of paths any more.
   2748      [Richard Levitte]
   2750  Changes between 0.9.8 and 0.9.8a  [11 Oct 2005]
   2752   *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
   2753      (part of SSL_OP_ALL).  This option used to disable the
   2754      countermeasure against man-in-the-middle protocol-version
   2755      rollback in the SSL 2.0 server implementation, which is a bad
   2756      idea.  (CVE-2005-2969)
   2758      [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
   2759      for Information Security, National Institute of Advanced Industrial
   2760      Science and Technology [AIST], Japan)]
   2762   *) Add two function to clear and return the verify parameter flags.
   2763      [Steve Henson]
   2765   *) Keep cipherlists sorted in the source instead of sorting them at
   2766      runtime, thus removing the need for a lock.
   2767      [Nils Larsch]
   2769   *) Avoid some small subgroup attacks in Diffie-Hellman.
   2770      [Nick Mathewson and Ben Laurie]
   2772   *) Add functions for well-known primes.
   2773      [Nick Mathewson]
   2775   *) Extended Windows CE support.
   2776      [Satoshi Nakamura and Andy Polyakov]
   2778   *) Initialize SSL_METHOD structures at compile time instead of during
   2779      runtime, thus removing the need for a lock.
   2780      [Steve Henson]
   2782   *) Make PKCS7_decrypt() work even if no certificate is supplied by
   2783      attempting to decrypt each encrypted key in turn. Add support to
   2784      smime utility.
   2785      [Steve Henson]
   2787  Changes between 0.9.7h and 0.9.8  [05 Jul 2005]
   2789   [NB: OpenSSL 0.9.7i and later 0.9.7 patch levels were released after
   2790   OpenSSL 0.9.8.]
   2792   *) Add libcrypto.pc and libssl.pc for those who feel they need them.
   2793      [Richard Levitte]
   2795   *) Change CA.sh and CA.pl so they don't bundle the CSR and the private
   2796      key into the same file any more.
   2797      [Richard Levitte]
   2799   *) Add initial support for Win64, both IA64 and AMD64/x64 flavors.
   2800      [Andy Polyakov]
   2802   *) Add -utf8 command line and config file option to 'ca'.
   2803      [Stefan <stf (a] udoma.org]
   2805   *) Removed the macro des_crypt(), as it seems to conflict with some
   2806      libraries.  Use DES_crypt().
   2807      [Richard Levitte]
   2809   *) Correct naming of the 'chil' and '4758cca' ENGINEs. This
   2810      involves renaming the source and generated shared-libs for
   2811      both. The engines will accept the corrected or legacy ids
   2812      ('ncipher' and '4758_cca' respectively) when binding. NB,
   2813      this only applies when building 'shared'.
   2814      [Corinna Vinschen <vinschen (a] redhat.com> and Geoff Thorpe]
   2816   *) Add attribute functions to EVP_PKEY structure. Modify
   2817      PKCS12_create() to recognize a CSP name attribute and
   2818      use it. Make -CSP option work again in pkcs12 utility.
   2819      [Steve Henson]
   2821   *) Add new functionality to the bn blinding code:
   2822      - automatic re-creation of the BN_BLINDING parameters after
   2823        a fixed number of uses (currently 32)
   2824      - add new function for parameter creation
   2825      - introduce flags to control the update behaviour of the
   2826        BN_BLINDING parameters
   2827      - hide BN_BLINDING structure
   2828      Add a second BN_BLINDING slot to the RSA structure to improve
   2829      performance when a single RSA object is shared among several
   2830      threads.
   2831      [Nils Larsch]
   2833   *) Add support for DTLS.
   2834      [Nagendra Modadugu <nagendra (a] cs.stanford.edu> and Ben Laurie]
   2836   *) Add support for DER encoded private keys (SSL_FILETYPE_ASN1)
   2837      to SSL_CTX_use_PrivateKey_file() and SSL_use_PrivateKey_file()
   2838      [Walter Goulet]
   2840   *) Remove buggy and incompletet DH cert support from
   2841      ssl/ssl_rsa.c and ssl/s3_both.c
   2842      [Nils Larsch]
   2844   *) Use SHA-1 instead of MD5 as the default digest algorithm for
   2845      the apps/openssl applications.
   2846      [Nils Larsch]
   2848   *) Compile clean with "-Wall -Wmissing-prototypes
   2849      -Wstrict-prototypes -Wmissing-declarations -Werror". Currently
   2850      DEBUG_SAFESTACK must also be set.
   2851      [Ben Laurie]
   2853   *) Change ./Configure so that certain algorithms can be disabled by default.
   2854      The new counterpiece to "no-xxx" is "enable-xxx".
   2856      The patented RC5 and MDC2 algorithms will now be disabled unless
   2857      "enable-rc5" and "enable-mdc2", respectively, are specified.
   2859      (IDEA remains enabled despite being patented.  This is because IDEA
   2860      is frequently required for interoperability, and there is no license
   2861      fee for non-commercial use.  As before, "no-idea" can be used to
   2862      avoid this algorithm.)
   2864      [Bodo Moeller]
   2866   *) Add processing of proxy certificates (see RFC 3820).  This work was
   2867      sponsored by KTH (The Royal Institute of Technology in Stockholm) and
   2868      EGEE (Enabling Grids for E-science in Europe).
   2869      [Richard Levitte]
   2871   *) RC4 performance overhaul on modern architectures/implementations, such
   2872      as Intel P4, IA-64 and AMD64.
   2873      [Andy Polyakov]
   2875   *) New utility extract-section.pl. This can be used specify an alternative
   2876      section number in a pod file instead of having to treat each file as
   2877      a separate case in Makefile. This can be done by adding two lines to the
   2878      pod file:
   2880      =for comment openssl_section:XXX
   2882      The blank line is mandatory.
   2884      [Steve Henson]
   2886   *) New arguments -certform, -keyform and -pass for s_client and s_server
   2887      to allow alternative format key and certificate files and passphrase
   2888      sources.
   2889      [Steve Henson]
   2891   *) New structure X509_VERIFY_PARAM which combines current verify parameters,
   2892      update associated structures and add various utility functions.
   2894      Add new policy related verify parameters, include policy checking in 
   2895      standard verify code. Enhance 'smime' application with extra parameters
   2896      to support policy checking and print out.
   2897      [Steve Henson]
   2899   *) Add a new engine to support VIA PadLock ACE extensions in the VIA C3
   2900      Nehemiah processors. These extensions support AES encryption in hardware
   2901      as well as RNG (though RNG support is currently disabled).
   2902      [Michal Ludvig <michal (a] logix.cz>, with help from Andy Polyakov]
   2904   *) Deprecate BN_[get|set]_params() functions (they were ignored internally).
   2905      [Geoff Thorpe]
   2907   *) New FIPS 180-2 algorithms, SHA-224/-256/-384/-512 are implemented.
   2908      [Andy Polyakov and a number of other people]
   2910   *) Improved PowerPC platform support. Most notably BIGNUM assembler
   2911      implementation contributed by IBM.
   2912      [Suresh Chari, Peter Waltenberg, Andy Polyakov]
   2914   *) The new 'RSA_generate_key_ex' function now takes a BIGNUM for the public
   2915      exponent rather than 'unsigned long'. There is a corresponding change to
   2916      the new 'rsa_keygen' element of the RSA_METHOD structure.
   2917      [Jelte Jansen, Geoff Thorpe]
   2919   *) Functionality for creating the initial serial number file is now
   2920      moved from CA.pl to the 'ca' utility with a new option -create_serial.
   2922      (Before OpenSSL 0.9.7e, CA.pl used to initialize the serial
   2923      number file to 1, which is bound to cause problems.  To avoid
   2924      the problems while respecting compatibility between different 0.9.7
   2925      patchlevels, 0.9.7e  employed 'openssl x509 -next_serial' in
   2926      CA.pl for serial number initialization.  With the new release 0.9.8,
   2927      we can fix the problem directly in the 'ca' utility.)
   2928      [Steve Henson]
   2930   *) Reduced header interdepencies by declaring more opaque objects in
   2931      ossl_typ.h. As a consequence, including some headers (eg. engine.h) will
   2932      give fewer recursive includes, which could break lazy source code - so
   2933      this change is covered by the OPENSSL_NO_DEPRECATED symbol. As always,
   2934      developers should define this symbol when building and using openssl to
   2935      ensure they track the recommended behaviour, interfaces, [etc], but
   2936      backwards-compatible behaviour prevails when this isn't defined.
   2937      [Geoff Thorpe]
   2939   *) New function X509_POLICY_NODE_print() which prints out policy nodes.
   2940      [Steve Henson]
   2942   *) Add new EVP function EVP_CIPHER_CTX_rand_key and associated functionality.
   2943      This will generate a random key of the appropriate length based on the 
   2944      cipher context. The EVP_CIPHER can provide its own random key generation
   2945      routine to support keys of a specific form. This is used in the des and 
   2946      3des routines to generate a key of the correct parity. Update S/MIME
   2947      code to use new functions and hence generate correct parity DES keys.
   2948      Add EVP_CHECK_DES_KEY #define to return an error if the key is not 
   2949      valid (weak or incorrect parity).
   2950      [Steve Henson]
   2952   *) Add a local set of CRLs that can be used by X509_verify_cert() as well
   2953      as looking them up. This is useful when the verified structure may contain
   2954      CRLs, for example PKCS#7 signedData. Modify PKCS7_verify() to use any CRLs
   2955      present unless the new PKCS7_NO_CRL flag is asserted.
   2956      [Steve Henson]
   2958   *) Extend ASN1 oid configuration module. It now additionally accepts the
   2959      syntax:
   2961      shortName = some long name,
   2962      [Steve Henson]
   2964   *) Reimplemented the BN_CTX implementation. There is now no more static
   2965      limitation on the number of variables it can handle nor the depth of the
   2966      "stack" handling for BN_CTX_start()/BN_CTX_end() pairs. The stack
   2967      information can now expand as required, and rather than having a single
   2968      static array of bignums, BN_CTX now uses a linked-list of such arrays
   2969      allowing it to expand on demand whilst maintaining the usefulness of
   2970      BN_CTX's "bundling".
   2971      [Geoff Thorpe]
   2973   *) Add a missing BN_CTX parameter to the 'rsa_mod_exp' callback in RSA_METHOD
   2974      to allow all RSA operations to function using a single BN_CTX.
   2975      [Geoff Thorpe]
   2977   *) Preliminary support for certificate policy evaluation and checking. This
   2978      is initially intended to pass the tests outlined in "Conformance Testing
   2979      of Relying Party Client Certificate Path Processing Logic" v1.07.
   2980      [Steve Henson]
   2982   *) bn_dup_expand() has been deprecated, it was introduced in 0.9.7 and
   2983      remained unused and not that useful. A variety of other little bignum
   2984      tweaks and fixes have also been made continuing on from the audit (see
   2985      below).
   2986      [Geoff Thorpe]
   2988   *) Constify all or almost all d2i, c2i, s2i and r2i functions, along with
   2989      associated ASN1, EVP and SSL functions and old ASN1 macros.
   2990      [Richard Levitte]
   2992   *) BN_zero() only needs to set 'top' and 'neg' to zero for correct results,
   2993      and this should never fail. So the return value from the use of
   2994      BN_set_word() (which can fail due to needless expansion) is now deprecated;
   2995      if OPENSSL_NO_DEPRECATED is defined, BN_zero() is a void macro.
   2996      [Geoff Thorpe]
   2998   *) BN_CTX_get() should return zero-valued bignums, providing the same
   2999      initialised value as BN_new().
   3000      [Geoff Thorpe, suggested by Ulf Mller]
   3002   *) Support for inhibitAnyPolicy certificate extension.
   3003      [Steve Henson]
   3005   *) An audit of the BIGNUM code is underway, for which debugging code is
   3006      enabled when BN_DEBUG is defined. This makes stricter enforcements on what
   3007      is considered valid when processing BIGNUMs, and causes execution to
   3008      assert() when a problem is discovered. If BN_DEBUG_RAND is defined,
   3009      further steps are taken to deliberately pollute unused data in BIGNUM
   3010      structures to try and expose faulty code further on. For now, openssl will
   3011      (in its default mode of operation) continue to tolerate the inconsistent
   3012      forms that it has tolerated in the past, but authors and packagers should
   3013      consider trying openssl and their own applications when compiled with
   3014      these debugging symbols defined. It will help highlight potential bugs in
   3015      their own code, and will improve the test coverage for OpenSSL itself. At
   3016      some point, these tighter rules will become openssl's default to improve
   3017      maintainability, though the assert()s and other overheads will remain only
   3018      in debugging configurations. See bn.h for more details.
   3019      [Geoff Thorpe, Nils Larsch, Ulf Mller]
   3021   *) BN_CTX_init() has been deprecated, as BN_CTX is an opaque structure
   3022      that can only be obtained through BN_CTX_new() (which implicitly
   3023      initialises it). The presence of this function only made it possible
   3024      to overwrite an existing structure (and cause memory leaks).
   3025      [Geoff Thorpe]
   3027   *) Because of the callback-based approach for implementing LHASH as a
   3028      template type, lh_insert() adds opaque objects to hash-tables and
   3029      lh_doall() or lh_doall_arg() are typically used with a destructor callback
   3030      to clean up those corresponding objects before destroying the hash table
   3031      (and losing the object pointers). So some over-zealous constifications in
   3032      LHASH have been relaxed so that lh_insert() does not take (nor store) the
   3033      objects as "const" and the lh_doall[_arg] callback wrappers are not
   3034      prototyped to have "const" restrictions on the object pointers they are
   3035      given (and so aren't required to cast them away any more).
   3036      [Geoff Thorpe]
   3038   *) The tmdiff.h API was so ugly and minimal that our own timing utility
   3039      (speed) prefers to use its own implementation. The two implementations
   3040      haven't been consolidated as yet (volunteers?) but the tmdiff API has had
   3041      its object type properly exposed (MS_TM) instead of casting to/from "char
   3042      *". This may still change yet if someone realises MS_TM and "ms_time_***"
   3043      aren't necessarily the greatest nomenclatures - but this is what was used
   3044      internally to the implementation so I've used that for now.
   3045      [Geoff Thorpe]
   3047   *) Ensure that deprecated functions do not get compiled when
   3048      OPENSSL_NO_DEPRECATED is defined. Some "openssl" subcommands and a few of
   3049      the self-tests were still using deprecated key-generation functions so
   3050      these have been updated also.
   3051      [Geoff Thorpe]
   3053   *) Reorganise PKCS#7 code to separate the digest location functionality
   3054      into PKCS7_find_digest(), digest addtion into PKCS7_bio_add_digest().
   3055      New function PKCS7_set_digest() to set the digest type for PKCS#7
   3056      digestedData type. Add additional code to correctly generate the
   3057      digestedData type and add support for this type in PKCS7 initialization
   3058      functions.
   3059      [Steve Henson]
   3061   *) New function PKCS7_set0_type_other() this initializes a PKCS7 
   3062      structure of type "other".
   3063      [Steve Henson]
   3065   *) Fix prime generation loop in crypto/bn/bn_prime.pl by making
   3066      sure the loop does correctly stop and breaking ("division by zero")
   3067      modulus operations are not performed. The (pre-generated) prime
   3068      table crypto/bn/bn_prime.h was already correct, but it could not be
   3069      re-generated on some platforms because of the "division by zero"
   3070      situation in the script.
   3071      [Ralf S. Engelschall]
   3073   *) Update support for ECC-based TLS ciphersuites according to
   3074      draft-ietf-tls-ecc-03.txt: the KDF1 key derivation function with
   3075      SHA-1 now is only used for "small" curves (where the
   3076      representation of a field element takes up to 24 bytes); for
   3077      larger curves, the field element resulting from ECDH is directly
   3078      used as premaster secret.
   3079      [Douglas Stebila (Sun Microsystems Laboratories)]
   3081   *) Add code for kP+lQ timings to crypto/ec/ectest.c, and add SEC2
   3082      curve secp160r1 to the tests.
   3083      [Douglas Stebila (Sun Microsystems Laboratories)]
   3085   *) Add the possibility to load symbols globally with DSO.
   3086      [Gtz Babin-Ebell <babin-ebell (a] trustcenter.de> via Richard Levitte]
   3088   *) Add the functions ERR_set_mark() and ERR_pop_to_mark() for better
   3089      control of the error stack.
   3090      [Richard Levitte]
   3092   *) Add support for STORE in ENGINE.
   3093      [Richard Levitte]
   3095   *) Add the STORE type.  The intention is to provide a common interface
   3096      to certificate and key stores, be they simple file-based stores, or
   3097      HSM-type store, or LDAP stores, or...
   3098      NOTE: The code is currently UNTESTED and isn't really used anywhere.
   3099      [Richard Levitte]
   3101   *) Add a generic structure called OPENSSL_ITEM.  This can be used to
   3102      pass a list of arguments to any function as well as provide a way
   3103      for a function to pass data back to the caller.
   3104      [Richard Levitte]
   3106   *) Add the functions BUF_strndup() and BUF_memdup().  BUF_strndup()
   3107      works like BUF_strdup() but can be used to duplicate a portion of
   3108      a string.  The copy gets NUL-terminated.  BUF_memdup() duplicates
   3109      a memory area.
   3110      [Richard Levitte]
   3112   *) Add the function sk_find_ex() which works like sk_find(), but will
   3113      return an index to an element even if an exact match couldn't be
   3114      found.  The index is guaranteed to point at the element where the
   3115      searched-for key would be inserted to preserve sorting order.
   3116      [Richard Levitte]
   3118   *) Add the function OBJ_bsearch_ex() which works like OBJ_bsearch() but
   3119      takes an extra flags argument for optional functionality.  Currently,
   3120      the following flags are defined:
   3123 	This one gets OBJ_bsearch_ex() to return a pointer to the first
   3124 	element where the comparing function returns a negative or zero
   3125 	number.
   3128 	This one gets OBJ_bsearch_ex() to return a pointer to the first
   3129 	element where the comparing function returns zero.  This is useful
   3130 	if there are more than one element where the comparing function
   3131 	returns zero.
   3132      [Richard Levitte]
   3134   *) Make it possible to create self-signed certificates with 'openssl ca'
   3135      in such a way that the self-signed certificate becomes part of the
   3136      CA database and uses the same mechanisms for serial number generation
   3137      as all other certificate signing.  The new flag '-selfsign' enables
   3138      this functionality.  Adapt CA.sh and CA.pl.in.
   3139      [Richard Levitte]
   3141   *) Add functionality to check the public key of a certificate request
   3142      against a given private.  This is useful to check that a certificate
   3143      request can be signed by that key (self-signing).
   3144      [Richard Levitte]
   3146   *) Make it possible to have multiple active certificates with the same
   3147      subject in the CA index file.  This is done only if the keyword
   3148      'unique_subject' is set to 'no' in the main CA section (default
   3149      if 'CA_default') of the configuration file.  The value is saved
   3150      with the database itself in a separate index attribute file,
   3151      named like the index file with '.attr' appended to the name.
   3152      [Richard Levitte]
   3154   *) Generate muti valued AVAs using '+' notation in config files for
   3155      req and dirName.
   3156      [Steve Henson]
   3158   *) Support for nameConstraints certificate extension.
   3159      [Steve Henson]
   3161   *) Support for policyConstraints certificate extension.
   3162      [Steve Henson]
   3164   *) Support for policyMappings certificate extension.
   3165      [Steve Henson]
   3167   *) Make sure the default DSA_METHOD implementation only uses its
   3168      dsa_mod_exp() and/or bn_mod_exp() handlers if they are non-NULL,
   3169      and change its own handlers to be NULL so as to remove unnecessary
   3170      indirection. This lets alternative implementations fallback to the
   3171      default implementation more easily.
   3172      [Geoff Thorpe]
   3174   *) Support for directoryName in GeneralName related extensions
   3175      in config files.
   3176      [Steve Henson]
   3178   *) Make it possible to link applications using Makefile.shared.
   3179      Make that possible even when linking against static libraries!
   3180      [Richard Levitte]
   3182   *) Support for single pass processing for S/MIME signing. This now
   3183      means that S/MIME signing can be done from a pipe, in addition
   3184      cleartext signing (multipart/signed type) is effectively streaming
   3185      and the signed data does not need to be all held in memory.
   3187      This is done with a new flag PKCS7_STREAM. When this flag is set
   3188      PKCS7_sign() only initializes the PKCS7 structure and the actual signing
   3189      is done after the data is output (and digests calculated) in
   3190      SMIME_write_PKCS7().
   3191      [Steve Henson]
   3193   *) Add full support for -rpath/-R, both in shared libraries and
   3194      applications, at least on the platforms where it's known how
   3195      to do it.
   3196      [Richard Levitte]
   3198   *) In crypto/ec/ec_mult.c, implement fast point multiplication with
   3199      precomputation, based on wNAF splitting: EC_GROUP_precompute_mult()
   3200      will now compute a table of multiples of the generator that
   3201      makes subsequent invocations of EC_POINTs_mul() or EC_POINT_mul()
   3202      faster (notably in the case of a single point multiplication,
   3203      scalar * generator).
   3204      [Nils Larsch, Bodo Moeller]
   3206   *) IPv6 support for certificate extensions. The various extensions
   3207      which use the IP:a.b.c.d can now take IPv6 addresses using the
   3208      formats of RFC1884 2.2 . IPv6 addresses are now also displayed
   3209      correctly.
   3210      [Steve Henson]
   3212   *) Added an ENGINE that implements RSA by performing private key
   3213      exponentiations with the GMP library. The conversions to and from
   3214      GMP's mpz_t format aren't optimised nor are any montgomery forms
   3215      cached, and on x86 it appears OpenSSL's own performance has caught up.
   3216      However there are likely to be other architectures where GMP could
   3217      provide a boost. This ENGINE is not built in by default, but it can be
   3218      specified at Configure time and should be accompanied by the necessary
   3219      linker additions, eg;
   3220          ./config -DOPENSSL_USE_GMP -lgmp
   3221      [Geoff Thorpe]
   3223   *) "openssl engine" will not display ENGINE/DSO load failure errors when
   3224      testing availability of engines with "-t" - the old behaviour is
   3225      produced by increasing the feature's verbosity with "-tt".
   3226      [Geoff Thorpe]
   3228   *) ECDSA routines: under certain error conditions uninitialized BN objects
   3229      could be freed. Solution: make sure initialization is performed early
   3230      enough. (Reported and fix supplied by Nils Larsch <nla (a] trustcenter.de>
   3231      via PR#459)
   3232      [Lutz Jaenicke]
   3234   *) Key-generation can now be implemented in RSA_METHOD, DSA_METHOD
   3235      and DH_METHOD (eg. by ENGINE implementations) to override the normal
   3236      software implementations. For DSA and DH, parameter generation can
   3237      also be overriden by providing the appropriate method callbacks.
   3238      [Geoff Thorpe]
   3240   *) Change the "progress" mechanism used in key-generation and
   3241      primality testing to functions that take a new BN_GENCB pointer in
   3242      place of callback/argument pairs. The new API functions have "_ex"
   3243      postfixes and the older functions are reimplemented as wrappers for
   3244      the new ones. The OPENSSL_NO_DEPRECATED symbol can be used to hide
   3245      declarations of the old functions to help (graceful) attempts to
   3246      migrate to the new functions. Also, the new key-generation API
   3247      functions operate on a caller-supplied key-structure and return
   3248      success/failure rather than returning a key or NULL - this is to
   3249      help make "keygen" another member function of RSA_METHOD etc.
   3251      Example for using the new callback interface:
   3253           int (*my_callback)(int a, int b, BN_GENCB *cb) = ...;
   3254           void *my_arg = ...;
   3255           BN_GENCB my_cb;
   3257           BN_GENCB_set(&my_cb, my_callback, my_arg);
   3259           return BN_is_prime_ex(some_bignum, BN_prime_checks, NULL, &cb);
   3260           /* For the meaning of a, b in calls to my_callback(), see the
   3261            * documentation of the function that calls the callback.
   3262            * cb will point to my_cb; my_arg can be retrieved as cb->arg.
   3263            * my_callback should return 1 if it wants BN_is_prime_ex()
   3264            * to continue, or 0 to stop.
   3265            */
   3267      [Geoff Thorpe]
   3269   *) Change the ZLIB compression method to be stateful, and make it
   3270      available to TLS with the number defined in 
   3271      draft-ietf-tls-compression-04.txt.
   3272      [Richard Levitte]
   3274   *) Add the ASN.1 structures and functions for CertificatePair, which
   3275      is defined as follows (according to X.509_4thEditionDraftV6.pdf):
   3277      CertificatePair ::= SEQUENCE {
   3278         forward		[0]	Certificate OPTIONAL,
   3279         reverse		[1]	Certificate OPTIONAL,
   3280         -- at least one of the pair shall be present -- }
   3282      Also implement the PEM functions to read and write certificate
   3283      pairs, and defined the PEM tag as "CERTIFICATE PAIR".
   3285      This needed to be defined, mostly for the sake of the LDAP
   3286      attribute crossCertificatePair, but may prove useful elsewhere as
   3287      well.
   3288      [Richard Levitte]
   3290   *) Make it possible to inhibit symlinking of shared libraries in
   3291      Makefile.shared, for Cygwin's sake.
   3292      [Richard Levitte]
   3294   *) Extend the BIGNUM API by creating a function 
   3295           void BN_set_negative(BIGNUM *a, int neg);
   3296      and a macro that behave like
   3297           int  BN_is_negative(const BIGNUM *a);
   3299      to avoid the need to access 'a->neg' directly in applications.
   3300      [Nils Larsch]
   3302   *) Implement fast modular reduction for pseudo-Mersenne primes
   3303      used in NIST curves (crypto/bn/bn_nist.c, crypto/ec/ecp_nist.c).
   3304      EC_GROUP_new_curve_GFp() will now automatically use this
   3305      if applicable.
   3306      [Nils Larsch <nla (a] trustcenter.de>]
   3308   *) Add new lock type (CRYPTO_LOCK_BN).
   3309      [Bodo Moeller]
   3311   *) Change the ENGINE framework to automatically load engines
   3312      dynamically from specific directories unless they could be
   3313      found to already be built in or loaded.  Move all the
   3314      current engines except for the cryptodev one to a new
   3315      directory engines/.
   3316      The engines in engines/ are built as shared libraries if
   3317      the "shared" options was given to ./Configure or ./config.
   3318      Otherwise, they are inserted in libcrypto.a.
   3319      /usr/local/ssl/engines is the default directory for dynamic
   3320      engines, but that can be overriden at configure time through
   3321      the usual use of --prefix and/or --openssldir, and at run
   3322      time with the environment variable OPENSSL_ENGINES.
   3323      [Geoff Thorpe and Richard Levitte]
   3325   *) Add Makefile.shared, a helper makefile to build shared
   3326      libraries.  Addapt Makefile.org.
   3327      [Richard Levitte]
   3329   *) Add version info to Win32 DLLs.
   3330      [Peter 'Luna' Runestig" <peter (a] runestig.com>]
   3332   *) Add new 'medium level' PKCS#12 API. Certificates and keys
   3333      can be added using this API to created arbitrary PKCS#12
   3334      files while avoiding the low level API.
   3336      New options to PKCS12_create(), key or cert can be NULL and
   3337      will then be omitted from the output file. The encryption
   3338      algorithm NIDs can be set to -1 for no encryption, the mac
   3339      iteration count can be set to 0 to omit the mac.
   3341      Enhance pkcs12 utility by making the -nokeys and -nocerts
   3342      options work when creating a PKCS#12 file. New option -nomac
   3343      to omit the mac, NONE can be set for an encryption algorithm.
   3344      New code is modified to use the enhanced PKCS12_create()
   3345      instead of the low level API.
   3346      [Steve Henson]
   3348   *) Extend ASN1 encoder to support indefinite length constructed
   3349      encoding. This can output sequences tags and octet strings in
   3350      this form. Modify pk7_asn1.c to support indefinite length
   3351      encoding. This is experimental and needs additional code to
   3352      be useful, such as an ASN1 bio and some enhanced streaming
   3353      PKCS#7 code.
   3355      Extend template encode functionality so that tagging is passed
   3356      down to the template encoder.
   3357      [Steve Henson]
   3359   *) Let 'openssl req' fail if an argument to '-newkey' is not
   3360      recognized instead of using RSA as a default.
   3361      [Bodo Moeller]
   3363   *) Add support for ECC-based ciphersuites from draft-ietf-tls-ecc-01.txt.
   3364      As these are not official, they are not included in "ALL";
   3365      the "ECCdraft" ciphersuite group alias can be used to select them.
   3366      [Vipul Gupta and Sumit Gupta (Sun Microsystems Laboratories)]
   3368   *) Add ECDH engine support.
   3369      [Nils Gura and Douglas Stebila (Sun Microsystems Laboratories)]
   3371   *) Add ECDH in new directory crypto/ecdh/.
   3372      [Douglas Stebila (Sun Microsystems Laboratories)]
   3374   *) Let BN_rand_range() abort with an error after 100 iterations
   3375      without success (which indicates a broken PRNG).
   3376      [Bodo Moeller]
   3378   *) Change BN_mod_sqrt() so that it verifies that the input value
   3379      is really the square of the return value.  (Previously,
   3380      BN_mod_sqrt would show GIGO behaviour.)
   3381      [Bodo Moeller]
   3383   *) Add named elliptic curves over binary fields from X9.62, SECG,
   3384      and WAP/WTLS; add OIDs that were still missing.
   3386      [Sheueling Chang Shantz and Douglas Stebila
   3387      (Sun Microsystems Laboratories)]
   3389   *) Extend the EC library for elliptic curves over binary fields
   3390      (new files ec2_smpl.c, ec2_smpt.c, ec2_mult.c in crypto/ec/).
   3391      New EC_METHOD:
   3393           EC_GF2m_simple_method
   3395      New API functions:
   3397           EC_GROUP_new_curve_GF2m
   3398           EC_GROUP_set_curve_GF2m
   3399           EC_GROUP_get_curve_GF2m
   3400           EC_POINT_set_affine_coordinates_GF2m
   3401           EC_POINT_get_affine_coordinates_GF2m
   3402           EC_POINT_set_compressed_coordinates_GF2m
   3404      Point compression for binary fields is disabled by default for
   3405      patent reasons (compile with OPENSSL_EC_BIN_PT_COMP defined to
   3406      enable it).
   3408      As binary polynomials are represented as BIGNUMs, various members
   3409      of the EC_GROUP and EC_POINT data structures can be shared
   3410      between the implementations for prime fields and binary fields;
   3411      the above ..._GF2m functions (except for EX_GROUP_new_curve_GF2m)
   3412      are essentially identical to their ..._GFp counterparts.
   3413      (For simplicity, the '..._GFp' prefix has been dropped from
   3414      various internal method names.)
   3416      An internal 'field_div' method (similar to 'field_mul' and
   3417      'field_sqr') has been added; this is used only for binary fields.
   3419      [Sheueling Chang Shantz and Douglas Stebila
   3420      (Sun Microsystems Laboratories)]
   3422   *) Optionally dispatch EC_POINT_mul(), EC_POINT_precompute_mult()
   3423      through methods ('mul', 'precompute_mult').
   3425      The generic implementations (now internally called 'ec_wNAF_mul'
   3426      and 'ec_wNAF_precomputed_mult') remain the default if these
   3427      methods are undefined.
   3429      [Sheueling Chang Shantz and Douglas Stebila
   3430      (Sun Microsystems Laboratories)]
   3432   *) New function EC_GROUP_get_degree, which is defined through
   3433      EC_METHOD.  For curves over prime fields, this returns the bit
   3434      length of the modulus.
   3436      [Sheueling Chang Shantz and Douglas Stebila
   3437      (Sun Microsystems Laboratories)]
   3439   *) New functions EC_GROUP_dup, EC_POINT_dup.
   3440      (These simply call ..._new  and ..._copy).
   3442      [Sheueling Chang Shantz and Douglas Stebila
   3443      (Sun Microsystems Laboratories)]
   3445   *) Add binary polynomial arithmetic software in crypto/bn/bn_gf2m.c.
   3446      Polynomials are represented as BIGNUMs (where the sign bit is not
   3447      used) in the following functions [macros]:  
   3449           BN_GF2m_add
   3450           BN_GF2m_sub             [= BN_GF2m_add]
   3451           BN_GF2m_mod             [wrapper for BN_GF2m_mod_arr]
   3452           BN_GF2m_mod_mul         [wrapper for BN_GF2m_mod_mul_arr]
   3453           BN_GF2m_mod_sqr         [wrapper for BN_GF2m_mod_sqr_arr]
   3454           BN_GF2m_mod_inv
   3455           BN_GF2m_mod_exp         [wrapper for BN_GF2m_mod_exp_arr]
   3456           BN_GF2m_mod_sqrt        [wrapper for BN_GF2m_mod_sqrt_arr]
   3457           BN_GF2m_mod_solve_quad  [wrapper for BN_GF2m_mod_solve_quad_arr]
   3458           BN_GF2m_cmp             [= BN_ucmp]
   3460      (Note that only the 'mod' functions are actually for fields GF(2^m).
   3461      BN_GF2m_add() is misnomer, but this is for the sake of consistency.)
   3463      For some functions, an the irreducible polynomial defining a
   3464      field can be given as an 'unsigned int[]' with strictly
   3465      decreasing elements giving the indices of those bits that are set;
   3466      i.e., p[] represents the polynomial
   3467           f(t) = t^p[0] + t^p[1] + ... + t^p[k]
   3468      where
   3469           p[0] > p[1] > ... > p[k] = 0.
   3470      This applies to the following functions:
   3472           BN_GF2m_mod_arr
   3473           BN_GF2m_mod_mul_arr
   3474           BN_GF2m_mod_sqr_arr
   3475           BN_GF2m_mod_inv_arr        [wrapper for BN_GF2m_mod_inv]
   3476           BN_GF2m_mod_div_arr        [wrapper for BN_GF2m_mod_div]
   3477           BN_GF2m_mod_exp_arr
   3478           BN_GF2m_mod_sqrt_arr
   3479           BN_GF2m_mod_solve_quad_arr
   3480           BN_GF2m_poly2arr
   3481           BN_GF2m_arr2poly
   3483      Conversion can be performed by the following functions:
   3485           BN_GF2m_poly2arr
   3486           BN_GF2m_arr2poly
   3488      bntest.c has additional tests for binary polynomial arithmetic.
   3490      Two implementations for BN_GF2m_mod_div() are available.
   3491      The default algorithm simply uses BN_GF2m_mod_inv() and
   3492      BN_GF2m_mod_mul().  The alternative algorithm is compiled in only
   3493      if OPENSSL_SUN_GF2M_DIV is defined (patent pending; read the
   3494      copyright notice in crypto/bn/bn_gf2m.c before enabling it).
   3496      [Sheueling Chang Shantz and Douglas Stebila
   3497      (Sun Microsystems Laboratories)]
   3499   *) Add new error code 'ERR_R_DISABLED' that can be used when some
   3500      functionality is disabled at compile-time.
   3501      [Douglas Stebila <douglas.stebila (a] sun.com>]
   3503   *) Change default behaviour of 'openssl asn1parse' so that more
   3504      information is visible when viewing, e.g., a certificate:
   3506      Modify asn1_parse2 (crypto/asn1/asn1_par.c) so that in non-'dump'
   3507      mode the content of non-printable OCTET STRINGs is output in a
   3508      style similar to INTEGERs, but with '[HEX DUMP]' prepended to
   3509      avoid the appearance of a printable string.
   3510      [Nils Larsch <nla (a] trustcenter.de>]
   3512   *) Add 'asn1_flag' and 'asn1_form' member to EC_GROUP with access
   3513      functions
   3514           EC_GROUP_set_asn1_flag()
   3515           EC_GROUP_get_asn1_flag()
   3516           EC_GROUP_set_point_conversion_form()
   3517           EC_GROUP_get_point_conversion_form()
   3518      These control ASN1 encoding details:
   3519      - Curves (i.e., groups) are encoded explicitly unless asn1_flag
   3520        has been set to OPENSSL_EC_NAMED_CURVE.
   3521      - Points are encoded in uncompressed form by default; options for
   3522        asn1_for are as for point2oct, namely
   3527      Also add 'seed' and 'seed_len' members to EC_GROUP with access
   3528      functions
   3529           EC_GROUP_set_seed()
   3530           EC_GROUP_get0_seed()
   3531           EC_GROUP_get_seed_len()
   3532      This is used only for ASN1 purposes (so far).
   3533      [Nils Larsch <nla (a] trustcenter.de>]
   3535   *) Add 'field_type' member to EC_METHOD, which holds the NID
   3536      of the appropriate field type OID.  The new function
   3537      EC_METHOD_get_field_type() returns this value.
   3538      [Nils Larsch <nla (a] trustcenter.de>]
   3540   *) Add functions 
   3541           EC_POINT_point2bn()
   3542           EC_POINT_bn2point()
   3543           EC_POINT_point2hex()
   3544           EC_POINT_hex2point()
   3545      providing useful interfaces to EC_POINT_point2oct() and
   3546      EC_POINT_oct2point().
   3547      [Nils Larsch <nla (a] trustcenter.de>]
   3549   *) Change internals of the EC library so that the functions
   3550           EC_GROUP_set_generator()
   3551           EC_GROUP_get_generator()
   3552           EC_GROUP_get_order()
   3553           EC_GROUP_get_cofactor()
   3554      are implemented directly in crypto/ec/ec_lib.c and not dispatched
   3555      to methods, which would lead to unnecessary code duplication when
   3556      adding different types of curves.
   3557      [Nils Larsch <nla (a] trustcenter.de> with input by Bodo Moeller]
   3559   *) Implement compute_wNAF (crypto/ec/ec_mult.c) without BIGNUM
   3560      arithmetic, and such that modified wNAFs are generated
   3561      (which avoid length expansion in many cases).
   3562      [Bodo Moeller]
   3564   *) Add a function EC_GROUP_check_discriminant() (defined via
   3565      EC_METHOD) that verifies that the curve discriminant is non-zero.
   3567      Add a function EC_GROUP_check() that makes some sanity tests
   3568      on a EC_GROUP, its generator and order.  This includes
   3569      EC_GROUP_check_discriminant().
   3570      [Nils Larsch <nla (a] trustcenter.de>]
   3572   *) Add ECDSA in new directory crypto/ecdsa/.
   3574      Add applications 'openssl ecparam' and 'openssl ecdsa'
   3575      (these are based on 'openssl dsaparam' and 'openssl dsa').
   3577      ECDSA support is also included in various other files across the
   3578      library.  Most notably,
   3579      - 'openssl req' now has a '-newkey ecdsa:file' option;
   3580      - EVP_PKCS82PKEY (crypto/evp/evp_pkey.c) now can handle ECDSA;
   3581      - X509_PUBKEY_get (crypto/asn1/x_pubkey.c) and
   3582        d2i_PublicKey (crypto/asn1/d2i_pu.c) have been modified to make
   3583        them suitable for ECDSA where domain parameters must be
   3584        extracted before the specific public key;
   3585      - ECDSA engine support has been added.
   3586      [Nils Larsch <nla (a] trustcenter.de>]
   3588   *) Include some named elliptic curves, and add OIDs from X9.62,
   3589      SECG, and WAP/WTLS.  Each curve can be obtained from the new
   3590      function
   3591           EC_GROUP_new_by_curve_name(),
   3592      and the list of available named curves can be obtained with
   3593           EC_get_builtin_curves().
   3594      Also add a 'curve_name' member to EC_GROUP objects, which can be
   3595      accessed via
   3596          EC_GROUP_set_curve_name()
   3597          EC_GROUP_get_curve_name()
   3598      [Nils Larsch <larsch (a] trustcenter.de, Bodo Moeller]
   3600   *) Remove a few calls to bn_wexpand() in BN_sqr() (the one in there
   3601      was actually never needed) and in BN_mul().  The removal in BN_mul()
   3602      required a small change in bn_mul_part_recursive() and the addition
   3603      of the functions bn_cmp_part_words(), bn_sub_part_words() and
   3604      bn_add_part_words(), which do the same thing as bn_cmp_words(),
   3605      bn_sub_words() and bn_add_words() except they take arrays with
   3606      differing sizes.
   3607      [Richard Levitte]
   3609  Changes between 0.9.7l and 0.9.7m  [23 Feb 2007]
   3611   *) Cleanse PEM buffers before freeing them since they may contain 
   3612      sensitive data.
   3613      [Benjamin Bennett <ben (a] psc.edu>]
   3615   *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
   3616      a ciphersuite string such as "DEFAULT:RSA" cannot enable
   3617      authentication-only ciphersuites.
   3618      [Bodo Moeller]
   3620   *) Since AES128 and AES256 share a single mask bit in the logic of
   3621      ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
   3622      kludge to work properly if AES128 is available and AES256 isn't.
   3623      [Victor Duchovni]
   3625   *) Expand security boundary to match 1.1.1 module.
   3626      [Steve Henson]
   3628   *) Remove redundant features: hash file source, editing of test vectors
   3629      modify fipsld to use external fips_premain.c signature.
   3630      [Steve Henson]
   3632   *) New perl script mkfipsscr.pl to create shell scripts or batch files to
   3633      run algorithm test programs.
   3634      [Steve Henson]
   3636   *) Make algorithm test programs more tolerant of whitespace.
   3637      [Steve Henson]
   3639   *) Have SSL/TLS server implementation tolerate "mismatched" record
   3640      protocol version while receiving ClientHello even if the
   3641      ClientHello is fragmented.  (The server can't insist on the
   3642      particular protocol version it has chosen before the ServerHello
   3643      message has informed the client about his choice.)
   3644      [Bodo Moeller]
   3646   *) Load error codes if they are not already present instead of using a
   3647      static variable. This allows them to be cleanly unloaded and reloaded.
   3648      [Steve Henson]
   3650  Changes between 0.9.7k and 0.9.7l  [28 Sep 2006]
   3652   *) Introduce limits to prevent malicious keys being able to
   3653      cause a denial of service.  (CVE-2006-2940)
   3654      [Steve Henson, Bodo Moeller]
   3656   *) Fix ASN.1 parsing of certain invalid structures that can result
   3657      in a denial of service.  (CVE-2006-2937)  [Steve Henson]
   3659   *) Fix buffer overflow in SSL_get_shared_ciphers() function. 
   3660      (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
   3662   *) Fix SSL client code which could crash if connecting to a
   3663      malicious SSLv2 server.  (CVE-2006-4343)
   3664      [Tavis Ormandy and Will Drewry, Google Security Team]
   3666   *) Change ciphersuite string processing so that an explicit
   3667      ciphersuite selects this one ciphersuite (so that "AES256-SHA"
   3668      will no longer include "AES128-SHA"), and any other similar
   3669      ciphersuite (same bitmap) from *other* protocol versions (so that
   3670      "RC4-MD5" will still include both the SSL 2.0 ciphersuite and the
   3671      SSL 3.0/TLS 1.0 ciphersuite).  This is a backport combining
   3672      changes from 0.9.8b and 0.9.8d.
   3673      [Bodo Moeller]
   3675  Changes between 0.9.7j and 0.9.7k  [05 Sep 2006]
   3677   *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
   3678      (CVE-2006-4339)  [Ben Laurie and Google Security Team]
   3680   *) Change the Unix randomness entropy gathering to use poll() when
   3681      possible instead of select(), since the latter has some
   3682      undesirable limitations.
   3683      [Darryl Miles via Richard Levitte and Bodo Moeller]
   3685   *) Disable rogue ciphersuites:
   3687       - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
   3688       - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
   3689       - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
   3691      The latter two were purportedly from
   3692      draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
   3693      appear there.
   3695      Also deactive the remaining ciphersuites from
   3696      draft-ietf-tls-56-bit-ciphersuites-01.txt.  These are just as
   3697      unofficial, and the ID has long expired.
   3698      [Bodo Moeller]
   3700   *) Fix RSA blinding Heisenbug (problems sometimes occured on
   3701      dual-core machines) and other potential thread-safety issues.
   3702      [Bodo Moeller]
   3704  Changes between 0.9.7i and 0.9.7j  [04 May 2006]
   3706   *) Adapt fipsld and the build system to link against the validated FIPS
   3707      module in FIPS mode.
   3708      [Steve Henson]
   3710   *) Fixes for VC++ 2005 build under Windows.
   3711      [Steve Henson]
   3713   *) Add new Windows build target VC-32-GMAKE for VC++. This uses GNU make 
   3714      from a Windows bash shell such as MSYS. It is autodetected from the
   3715      "config" script when run from a VC++ environment. Modify standard VC++
   3716      build to use fipscanister.o from the GNU make build. 
   3717      [Steve Henson]
   3719  Changes between 0.9.7h and 0.9.7i  [14 Oct 2005]
   3721   *) Wrapped the definition of EVP_MAX_MD_SIZE in a #ifdef OPENSSL_FIPS.
   3722      The value now differs depending on if you build for FIPS or not.
   3723      BEWARE!  A program linked with a shared FIPSed libcrypto can't be
   3724      safely run with a non-FIPSed libcrypto, as it may crash because of
   3725      the difference induced by this change.
   3726      [Andy Polyakov]
   3728  Changes between 0.9.7g and 0.9.7h  [11 Oct 2005]
   3730   *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
   3731      (part of SSL_OP_ALL).  This option used to disable the
   3732      countermeasure against man-in-the-middle protocol-version
   3733      rollback in the SSL 2.0 server implementation, which is a bad
   3734      idea.  (CVE-2005-2969)
   3736      [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
   3737      for Information Security, National Institute of Advanced Industrial
   3738      Science and Technology [AIST], Japan)]
   3740   *) Minimal support for X9.31 signatures and PSS padding modes. This is
   3741      mainly for FIPS compliance and not fully integrated at this stage.
   3742      [Steve Henson]
   3744   *) For DSA signing, unless DSA_FLAG_NO_EXP_CONSTTIME is set, perform
   3745      the exponentiation using a fixed-length exponent.  (Otherwise,
   3746      the information leaked through timing could expose the secret key
   3747      after many signatures; cf. Bleichenbacher's attack on DSA with
   3748      biased k.)
   3749      [Bodo Moeller]
   3751   *) Make a new fixed-window mod_exp implementation the default for
   3752      RSA, DSA, and DH private-key operations so that the sequence of
   3753      squares and multiplies and the memory access pattern are
   3754      independent of the particular secret key.  This will mitigate
   3755      cache-timing and potential related attacks.
   3757      BN_mod_exp_mont_consttime() is the new exponentiation implementation,
   3758      and this is automatically used by BN_mod_exp_mont() if the new flag
   3759      BN_FLG_EXP_CONSTTIME is set for the exponent.  RSA, DSA, and DH
   3760      will use this BN flag for private exponents unless the flag
   3762      DH_FLAG_NO_EXP_CONSTTIME, respectively, is set.
   3764      [Matthew D Wood (Intel Corp), with some changes by Bodo Moeller]
   3766   *) Change the client implementation for SSLv23_method() and
   3767      SSLv23_client_method() so that is uses the SSL 3.0/TLS 1.0
   3768      Client Hello message format if the SSL_OP_NO_SSLv2 option is set.
   3769      (Previously, the SSL 2.0 backwards compatible Client Hello
   3770      message format would be used even with SSL_OP_NO_SSLv2.)
   3771      [Bodo Moeller]
   3773   *) Add support for smime-type MIME parameter in S/MIME messages which some
   3774      clients need.
   3775      [Steve Henson]
   3777   *) New function BN_MONT_CTX_set_locked() to set montgomery parameters in
   3778      a threadsafe manner. Modify rsa code to use new function and add calls
   3779      to dsa and dh code (which had race conditions before).
   3780      [Steve Henson]
   3782   *) Include the fixed error library code in the C error file definitions
   3783      instead of fixing them up at runtime. This keeps the error code
   3784      structures constant.
   3785      [Steve Henson]
   3787  Changes between 0.9.7f and 0.9.7g  [11 Apr 2005]
   3789   [NB: OpenSSL 0.9.7h and later 0.9.7 patch levels were released after
   3790   OpenSSL 0.9.8.]
   3792   *) Fixes for newer kerberos headers. NB: the casts are needed because
   3793      the 'length' field is signed on one version and unsigned on another
   3794      with no (?) obvious way to tell the difference, without these VC++
   3795      complains. Also the "definition" of FAR (blank) is no longer included
   3796      nor is the error ENOMEM. KRB5_PRIVATE has to be set to 1 to pick up
   3797      some needed definitions.
   3798      [Steve Henson]
   3800   *) Undo Cygwin change.
   3801      [Ulf Mller]
   3803   *) Added support for proxy certificates according to RFC 3820.
   3804      Because they may be a security thread to unaware applications,
   3805      they must be explicitely allowed in run-time.  See
   3806      docs/HOWTO/proxy_certificates.txt for further information.
   3807      [Richard Levitte]
   3809  Changes between 0.9.7e and 0.9.7f  [22 Mar 2005]
   3811   *) Use (SSL_RANDOM_VALUE - 4) bytes of pseudo random data when generating
   3812      server and client random values. Previously
   3813      (SSL_RANDOM_VALUE - sizeof(time_t)) would be used which would result in
   3814      less random data when sizeof(time_t) > 4 (some 64 bit platforms).
   3816      This change has negligible security impact because:
   3818      1. Server and client random values still have 24 bytes of pseudo random
   3819         data.
   3821      2. Server and client random values are sent in the clear in the initial
   3822         handshake.
   3824      3. The master secret is derived using the premaster secret (48 bytes in
   3825         size for static RSA ciphersuites) as well as client server and random
   3826         values.
   3828      The OpenSSL team would like to thank the UK NISCC for bringing this issue
   3829      to our attention. 
   3831      [Stephen Henson, reported by UK NISCC]
   3833   *) Use Windows randomness collection on Cygwin.
   3834      [Ulf Mller]
   3836   *) Fix hang in EGD/PRNGD query when communication socket is closed
   3837      prematurely by EGD/PRNGD.
   3838      [Darren Tucker <dtucker (a] zip.com.au> via Lutz Jnicke, resolves #1014]
   3840   *) Prompt for pass phrases when appropriate for PKCS12 input format.
   3841      [Steve Henson]
   3843   *) Back-port of selected performance improvements from development
   3844      branch, as well as improved support for PowerPC platforms.
   3845      [Andy Polyakov]
   3847   *) Add lots of checks for memory allocation failure, error codes to indicate
   3848      failure and freeing up memory if a failure occurs.
   3849      [Nauticus Networks SSL Team <openssl (a] nauticusnet.com>, Steve Henson]
   3851   *) Add new -passin argument to dgst.
   3852      [Steve Henson]
   3854   *) Perform some character comparisons of different types in X509_NAME_cmp:
   3855      this is needed for some certificates that reencode DNs into UTF8Strings
   3856      (in violation of RFC3280) and can't or wont issue name rollover
   3857      certificates.
   3858      [Steve Henson]
   3860   *) Make an explicit check during certificate validation to see that
   3861      the CA setting in each certificate on the chain is correct.  As a
   3862      side effect always do the following basic checks on extensions,
   3863      not just when there's an associated purpose to the check:
   3865       - if there is an unhandled critical extension (unless the user
   3866         has chosen to ignore this fault)
   3867       - if the path length has been exceeded (if one is set at all)
   3868       - that certain extensions fit the associated purpose (if one has
   3869         been given)
   3870      [Richard Levitte]
   3872  Changes between 0.9.7d and 0.9.7e  [25 Oct 2004]
   3874   *) Avoid a race condition when CRLs are checked in a multi threaded 
   3875      environment. This would happen due to the reordering of the revoked
   3876      entries during signature checking and serial number lookup. Now the
   3877      encoding is cached and the serial number sort performed under a lock.
   3878      Add new STACK function sk_is_sorted().
   3879      [Steve Henson]
   3881   *) Add Delta CRL to the extension code.
   3882      [Steve Henson]
   3884   *) Various fixes to s3_pkt.c so alerts are sent properly.
   3885      [David Holmes <d.holmes (a] f5.com>]
   3887   *) Reduce the chances of duplicate issuer name and serial numbers (in
   3888      violation of RFC3280) using the OpenSSL certificate creation utilities.
   3889      This is done by creating a random 64 bit value for the initial serial
   3890      number when a serial number file is created or when a self signed
   3891      certificate is created using 'openssl req -x509'. The initial serial
   3892      number file is created using 'openssl x509 -next_serial' in CA.pl
   3893      rather than being initialized to 1.
   3894      [Steve Henson]
   3896  Changes between 0.9.7c and 0.9.7d  [17 Mar 2004]
   3898   *) Fix null-pointer assignment in do_change_cipher_spec() revealed           
   3899      by using the Codenomicon TLS Test Tool (CVE-2004-0079)                    
   3900      [Joe Orton, Steve Henson]   
   3902   *) Fix flaw in SSL/TLS handshaking when using Kerberos ciphersuites
   3903      (CVE-2004-0112)
   3904      [Joe Orton, Steve Henson]   
   3906   *) Make it possible to have multiple active certificates with the same
   3907      subject in the CA index file.  This is done only if the keyword
   3908      'unique_subject' is set to 'no' in the main CA section (default
   3909      if 'CA_default') of the configuration file.  The value is saved
   3910      with the database itself in a separate index attribute file,
   3911      named like the index file with '.attr' appended to the name.
   3912      [Richard Levitte]
   3914   *) X509 verify fixes. Disable broken certificate workarounds when 
   3915      X509_V_FLAGS_X509_STRICT is set. Check CRL issuer has cRLSign set if
   3916      keyUsage extension present. Don't accept CRLs with unhandled critical
   3917      extensions: since verify currently doesn't process CRL extensions this
   3918      rejects a CRL with *any* critical extensions. Add new verify error codes
   3919      for these cases.
   3920      [Steve Henson]
   3922   *) When creating an OCSP nonce use an OCTET STRING inside the extnValue.
   3923      A clarification of RFC2560 will require the use of OCTET STRINGs and 
   3924      some implementations cannot handle the current raw format. Since OpenSSL
   3925      copies and compares OCSP nonces as opaque blobs without any attempt at
   3926      parsing them this should not create any compatibility issues.
   3927      [Steve Henson]
   3929   *) New md flag EVP_MD_CTX_FLAG_REUSE this allows md_data to be reused when
   3930      calling EVP_MD_CTX_copy_ex() to avoid calling OPENSSL_malloc(). Without
   3931      this HMAC (and other) operations are several times slower than OpenSSL
   3932      < 0.9.7.
   3933      [Steve Henson]
   3935   *) Print out GeneralizedTime and UTCTime in ASN1_STRING_print_ex().
   3936      [Peter Sylvester <Peter.Sylvester (a] EdelWeb.fr>]
   3938   *) Use the correct content when signing type "other".
   3939      [Steve Henson]
   3941  Changes between 0.9.7b and 0.9.7c  [30 Sep 2003]
   3943   *) Fix various bugs revealed by running the NISCC test suite:
   3945      Stop out of bounds reads in the ASN1 code when presented with
   3946      invalid tags (CVE-2003-0543 and CVE-2003-0544).
   3948      Free up ASN1_TYPE correctly if ANY type is invalid (CVE-2003-0545).
   3950      If verify callback ignores invalid public key errors don't try to check
   3951      certificate signature with the NULL public key.
   3953      [Steve Henson]
   3955   *) New -ignore_err option in ocsp application to stop the server
   3956      exiting on the first error in a request.
   3957      [Steve Henson]
   3959   *) In ssl3_accept() (ssl/s3_srvr.c) only accept a client certificate
   3960      if the server requested one: as stated in TLS 1.0 and SSL 3.0
   3961      specifications.
   3962      [Steve Henson]
   3964   *) In ssl3_get_client_hello() (ssl/s3_srvr.c), tolerate additional
   3965      extra data after the compression methods not only for TLS 1.0
   3966      but also for SSL 3.0 (as required by the specification).
   3967      [Bodo Moeller; problem pointed out by Matthias Loepfe]
   3969   *) Change X509_certificate_type() to mark the key as exported/exportable
   3970      when it's 512 *bits* long, not 512 bytes.
   3971      [Richard Levitte]
   3973   *) Change AES_cbc_encrypt() so it outputs exact multiple of
   3974      blocks during encryption.
   3975      [Richard Levitte]
   3977   *) Various fixes to base64 BIO and non blocking I/O. On write 
   3978      flushes were not handled properly if the BIO retried. On read
   3979      data was not being buffered properly and had various logic bugs.
   3980      This also affects blocking I/O when the data being decoded is a
   3981      certain size.
   3982      [Steve Henson]
   3984   *) Various S/MIME bugfixes and compatibility changes:
   3985      output correct application/pkcs7 MIME type if
   3986      PKCS7_NOOLDMIMETYPE is set. Tolerate some broken signatures.
   3987      Output CR+LF for EOL if PKCS7_CRLFEOL is set (this makes opening
   3988      of files as .eml work). Correctly handle very long lines in MIME
   3989      parser.
   3990      [Steve Henson]
   3992  Changes between 0.9.7a and 0.9.7b  [10 Apr 2003]
   3994   *) Countermeasure against the Klima-Pokorny-Rosa extension of
   3995      Bleichbacher's attack on PKCS #1 v1.5 padding: treat
   3996      a protocol version number mismatch like a decryption error
   3997      in ssl3_get_client_key_exchange (ssl/s3_srvr.c).
   3998      [Bodo Moeller]
   4000   *) Turn on RSA blinding by default in the default implementation
   4001      to avoid a timing attack. Applications that don't want it can call
   4002      RSA_blinding_off() or use the new flag RSA_FLAG_NO_BLINDING.
   4003      They would be ill-advised to do so in most cases.
   4004      [Ben Laurie, Steve Henson, Geoff Thorpe, Bodo Moeller]
   4006   *) Change RSA blinding code so that it works when the PRNG is not
   4007      seeded (in this case, the secret RSA exponent is abused as
   4008      an unpredictable seed -- if it is not unpredictable, there
   4009      is no point in blinding anyway).  Make RSA blinding thread-safe
   4010      by remembering the creator's thread ID in rsa->blinding and
   4011      having all other threads use local one-time blinding factors
   4012      (this requires more computation than sharing rsa->blinding, but
   4013      avoids excessive locking; and if an RSA object is not shared
   4014      between threads, blinding will still be very fast).
   4015      [Bodo Moeller]
   4017   *) Fixed a typo bug that would cause ENGINE_set_default() to set an
   4018      ENGINE as defaults for all supported algorithms irrespective of
   4019      the 'flags' parameter. 'flags' is now honoured, so applications
   4020      should make sure they are passing it correctly.
   4021      [Geoff Thorpe]
   4023   *) Target "mingw" now allows native Windows code to be generated in
   4024      the Cygwin environment as well as with the MinGW compiler.
   4025      [Ulf Moeller] 
   4027  Changes between 0.9.7 and 0.9.7a  [19 Feb 2003]
   4029   *) In ssl3_get_record (ssl/s3_pkt.c), minimize information leaked
   4030      via timing by performing a MAC computation even if incorrrect
   4031      block cipher padding has been found.  This is a countermeasure
   4032      against active attacks where the attacker has to distinguish
   4033      between bad padding and a MAC verification error. (CVE-2003-0078)
   4035      [Bodo Moeller; problem pointed out by Brice Canvel (EPFL),
   4036      Alain Hiltgen (UBS), Serge Vaudenay (EPFL), and
   4037      Martin Vuagnoux (EPFL, Ilion)]
   4039   *) Make the no-err option work as intended.  The intention with no-err
   4040      is not to have the whole error stack handling routines removed from
   4041      libcrypto, it's only intended to remove all the function name and
   4042      reason texts, thereby removing some of the footprint that may not
   4043      be interesting if those errors aren't displayed anyway.
   4045      NOTE: it's still possible for any application or module to have it's
   4046      own set of error texts inserted.  The routines are there, just not
   4047      used by default when no-err is given.
   4048      [Richard Levitte]
   4050   *) Add support for FreeBSD on IA64.
   4051      [dirk.meyer (a] dinoex.sub.org via Richard Levitte, resolves #454]
   4053   *) Adjust DES_cbc_cksum() so it returns the same value as the MIT
   4054      Kerberos function mit_des_cbc_cksum().  Before this change,
   4055      the value returned by DES_cbc_cksum() was like the one from
   4056      mit_des_cbc_cksum(), except the bytes were swapped.
   4057      [Kevin Greaney <Kevin.Greaney (a] hp.com> and Richard Levitte]
   4059   *) Allow an application to disable the automatic SSL chain building.
   4060      Before this a rather primitive chain build was always performed in
   4061      ssl3_output_cert_chain(): an application had no way to send the 
   4062      correct chain if the automatic operation produced an incorrect result.
   4064      Now the chain builder is disabled if either:
   4066      1. Extra certificates are added via SSL_CTX_add_extra_chain_cert().
   4068      2. The mode flag SSL_MODE_NO_AUTO_CHAIN is set.
   4070      The reasoning behind this is that an application would not want the
   4071      auto chain building to take place if extra chain certificates are
   4072      present and it might also want a means of sending no additional
   4073      certificates (for example the chain has two certificates and the
   4074      root is omitted).
   4075      [Steve Henson]
   4077   *) Add the possibility to build without the ENGINE framework.
   4078      [Steven Reddie <smr (a] essemer.com.au> via Richard Levitte]
   4080   *) Under Win32 gmtime() can return NULL: check return value in
   4081      OPENSSL_gmtime(). Add error code for case where gmtime() fails.
   4082      [Steve Henson]
   4084   *) DSA routines: under certain error conditions uninitialized BN objects
   4085      could be freed. Solution: make sure initialization is performed early
   4086      enough. (Reported and fix supplied by Ivan D Nestlerode <nestler (a] MIT.EDU>,
   4087      Nils Larsch <nla (a] trustcenter.de> via PR#459)
   4088      [Lutz Jaenicke]
   4090   *) Another fix for SSLv2 session ID handling: the session ID was incorrectly
   4091      checked on reconnect on the client side, therefore session resumption
   4092      could still fail with a "ssl session id is different" error. This
   4093      behaviour is masked when SSL_OP_ALL is used due to
   4094      SSL_OP_MICROSOFT_SESS_ID_BUG being set.
   4095      Behaviour observed by Crispin Flowerday <crispin (a] flowerday.cx> as
   4096      followup to PR #377.
   4097      [Lutz Jaenicke]
   4099   *) IA-32 assembler support enhancements: unified ELF targets, support
   4100      for SCO/Caldera platforms, fix for Cygwin shared build.
   4101      [Andy Polyakov]
   4103   *) Add support for FreeBSD on sparc64.  As a consequence, support for
   4104      FreeBSD on non-x86 processors is separate from x86 processors on
   4105      the config script, much like the NetBSD support.
   4106      [Richard Levitte & Kris Kennaway <kris (a] obsecurity.org>]
   4108  Changes between 0.9.6h and 0.9.7  [31 Dec 2002]
   4110   [NB: OpenSSL 0.9.6i and later 0.9.6 patch levels were released after
   4111   OpenSSL 0.9.7.]
   4113   *) Fix session ID handling in SSLv2 client code: the SERVER FINISHED
   4114      code (06) was taken as the first octet of the session ID and the last
   4115      octet was ignored consequently. As a result SSLv2 client side session
   4116      caching could not have worked due to the session ID mismatch between
   4117      client and server.
   4118      Behaviour observed by Crispin Flowerday <crispin (a] flowerday.cx> as
   4119      PR #377.
   4120      [Lutz Jaenicke]
   4122   *) Change the declaration of needed Kerberos libraries to use EX_LIBS
   4123      instead of the special (and badly supported) LIBKRB5.  LIBKRB5 is
   4124      removed entirely.
   4125      [Richard Levitte]
   4127   *) The hw_ncipher.c engine requires dynamic locks.  Unfortunately, it
   4128      seems that in spite of existing for more than a year, many application
   4129      author have done nothing to provide the necessary callbacks, which
   4130      means that this particular engine will not work properly anywhere.
   4131      This is a very unfortunate situation which forces us, in the name
   4132      of usability, to give the hw_ncipher.c a static lock, which is part
   4133      of libcrypto.
   4134      NOTE: This is for the 0.9.7 series ONLY.  This hack will never
   4135      appear in 0.9.8 or later.  We EXPECT application authors to have
   4136      dealt properly with this when 0.9.8 is released (unless we actually
   4137      make such changes in the libcrypto locking code that changes will
   4138      have to be made anyway).
   4139      [Richard Levitte]
   4141   *) In asn1_d2i_read_bio() repeatedly call BIO_read() until all content
   4142      octets have been read, EOF or an error occurs. Without this change
   4143      some truncated ASN1 structures will not produce an error.
   4144      [Steve Henson]
   4146   *) Disable Heimdal support, since it hasn't been fully implemented.
   4147      Still give the possibility to force the use of Heimdal, but with
   4148      warnings and a request that patches get sent to openssl-dev.
   4149      [Richard Levitte]
   4151   *) Add the VC-CE target, introduce the WINCE sysname, and add
   4152      INSTALL.WCE and appropriate conditionals to make it build.
   4153      [Steven Reddie <smr (a] essemer.com.au> via Richard Levitte]
   4155   *) Change the DLL names for Cygwin to cygcrypto-x.y.z.dll and
   4156      cygssl-x.y.z.dll, where x, y and z are the major, minor and
   4157      edit numbers of the version.
   4158      [Corinna Vinschen <vinschen (a] redhat.com> and Richard Levitte]
   4160   *) Introduce safe string copy and catenation functions
   4161      (BUF_strlcpy() and BUF_strlcat()).
   4162      [Ben Laurie (CHATS) and Richard Levitte]
   4164   *) Avoid using fixed-size buffers for one-line DNs.
   4165      [Ben Laurie (CHATS)]
   4167   *) Add BUF_MEM_grow_clean() to avoid information leakage when
   4168      resizing buffers containing secrets, and use where appropriate.
   4169      [Ben Laurie (CHATS)]
   4171   *) Avoid using fixed size buffers for configuration file location.
   4172      [Ben Laurie (CHATS)]
   4174   *) Avoid filename truncation for various CA files.
   4175      [Ben Laurie (CHATS)]
   4177   *) Use sizeof in preference to magic numbers.
   4178      [Ben Laurie (CHATS)]
   4180   *) Avoid filename truncation in cert requests.
   4181      [Ben Laurie (CHATS)]
   4183   *) Add assertions to check for (supposedly impossible) buffer
   4184      overflows.
   4185      [Ben Laurie (CHATS)]
   4187   *) Don't cache truncated DNS entries in the local cache (this could
   4188      potentially lead to a spoofing attack).
   4189      [Ben Laurie (CHATS)]
   4191   *) Fix various buffers to be large enough for hex/decimal
   4192      representations in a platform independent manner.
   4193      [Ben Laurie (CHATS)]
   4195   *) Add CRYPTO_realloc_clean() to avoid information leakage when
   4196      resizing buffers containing secrets, and use where appropriate.
   4197      [Ben Laurie (CHATS)]
   4199   *) Add BIO_indent() to avoid much slightly worrying code to do
   4200      indents.
   4201      [Ben Laurie (CHATS)]
   4203   *) Convert sprintf()/BIO_puts() to BIO_printf().
   4204      [Ben Laurie (CHATS)]
   4206   *) buffer_gets() could terminate with the buffer only half
   4207      full. Fixed.
   4208      [Ben Laurie (CHATS)]
   4210   *) Add assertions to prevent user-supplied crypto functions from
   4211      overflowing internal buffers by having large block sizes, etc.
   4212      [Ben Laurie (CHATS)]
   4214   *) New OPENSSL_assert() macro (similar to assert(), but enabled
   4215      unconditionally).
   4216      [Ben Laurie (CHATS)]
   4218   *) Eliminate unused copy of key in RC4.
   4219      [Ben Laurie (CHATS)]
   4221   *) Eliminate unused and incorrectly sized buffers for IV in pem.h.
   4222      [Ben Laurie (CHATS)]
   4224   *) Fix off-by-one error in EGD path.
   4225      [Ben Laurie (CHATS)]
   4227   *) If RANDFILE path is too long, ignore instead of truncating.
   4228      [Ben Laurie (CHATS)]
   4230   *) Eliminate unused and incorrectly sized X.509 structure
   4231      CBCParameter.
   4232      [Ben Laurie (CHATS)]
   4234   *) Eliminate unused and dangerous function knumber().
   4235      [Ben Laurie (CHATS)]
   4237   *) Eliminate unused and dangerous structure, KSSL_ERR.
   4238      [Ben Laurie (CHATS)]
   4240   *) Protect against overlong session ID context length in an encoded
   4241      session object. Since these are local, this does not appear to be
   4242      exploitable.
   4243      [Ben Laurie (CHATS)]
   4245   *) Change from security patch (see 0.9.6e below) that did not affect
   4246      the 0.9.6 release series:
   4248      Remote buffer overflow in SSL3 protocol - an attacker could
   4249      supply an oversized master key in Kerberos-enabled versions.
   4250      (CVE-2002-0657)
   4251      [Ben Laurie (CHATS)]
   4253   *) Change the SSL kerb5 codes to match RFC 2712.
   4254      [Richard Levitte]
   4256   *) Make -nameopt work fully for req and add -reqopt switch.
   4257      [Michael Bell <michael.bell (a] rz.hu-berlin.de>, Steve Henson]
   4259   *) The "block size" for block ciphers in CFB and OFB mode should be 1.
   4260      [Steve Henson, reported by Yngve Nysaeter Pettersen <yngve (a] opera.com>]
   4262   *) Make sure tests can be performed even if the corresponding algorithms
   4263      have been removed entirely.  This was also the last step to make
   4264      OpenSSL compilable with DJGPP under all reasonable conditions.
   4265      [Richard Levitte, Doug Kaufman <dkaufman (a] rahul.net>]
   4267   *) Add cipher selection rules COMPLEMENTOFALL and COMPLEMENTOFDEFAULT
   4268      to allow version independent disabling of normally unselected ciphers,
   4269      which may be activated as a side-effect of selecting a single cipher.
   4271      (E.g., cipher list string "RSA" enables ciphersuites that are left
   4272      out of "ALL" because they do not provide symmetric encryption.
   4273      "RSA:!COMPLEMEMENTOFALL" avoids these unsafe ciphersuites.)
   4274      [Lutz Jaenicke, Bodo Moeller]
   4276   *) Add appropriate support for separate platform-dependent build
   4277      directories.  The recommended way to make a platform-dependent
   4278      build directory is the following (tested on Linux), maybe with
   4279      some local tweaks:
   4281 	# Place yourself outside of the OpenSSL source tree.  In
   4282 	# this example, the environment variable OPENSSL_SOURCE
   4283 	# is assumed to contain the absolute OpenSSL source directory.
   4284 	mkdir -p objtree/"`uname -s`-`uname -r`-`uname -m`"
   4285 	cd objtree/"`uname -s`-`uname -r`-`uname -m`"
   4286 	(cd $OPENSSL_SOURCE; find . -type f) | while read F; do
   4287 		mkdir -p `dirname $F`
   4288 		ln -s $OPENSSL_SOURCE/$F $F
   4289 	done
   4291      To be absolutely sure not to disturb the source tree, a "make clean"
   4292      is a good thing.  If it isn't successfull, don't worry about it,
   4293      it probably means the source directory is very clean.
   4294      [Richard Levitte]
   4296   *) Make sure any ENGINE control commands make local copies of string
   4297      pointers passed to them whenever necessary. Otherwise it is possible
   4298      the caller may have overwritten (or deallocated) the original string
   4299      data when a later ENGINE operation tries to use the stored values.
   4300      [Gtz Babin-Ebell <babinebell (a] trustcenter.de>]
   4302   *) Improve diagnostics in file reading and command-line digests.
   4303      [Ben Laurie aided and abetted by Solar Designer <solar (a] openwall.com>]
   4305   *) Add AES modes CFB and OFB to the object database.  Correct an
   4306      error in AES-CFB decryption.
   4307      [Richard Levitte]
   4309   *) Remove most calls to EVP_CIPHER_CTX_cleanup() in evp_enc.c, this 
   4310      allows existing EVP_CIPHER_CTX structures to be reused after
   4311      calling EVP_*Final(). This behaviour is used by encryption
   4312      BIOs and some applications. This has the side effect that
   4313      applications must explicitly clean up cipher contexts with
   4314      EVP_CIPHER_CTX_cleanup() or they will leak memory.
   4315      [Steve Henson]
   4317   *) Check the values of dna and dnb in bn_mul_recursive before calling
   4318      bn_mul_comba (a non zero value means the a or b arrays do not contain
   4319      n2 elements) and fallback to bn_mul_normal if either is not zero.
   4320      [Steve Henson]
   4322   *) Fix escaping of non-ASCII characters when using the -subj option
   4323      of the "openssl req" command line tool. (Robert Joop <joop (a] fokus.gmd.de>)
   4324      [Lutz Jaenicke]
   4326   *) Make object definitions compliant to LDAP (RFC2256): SN is the short
   4327      form for "surname", serialNumber has no short form.
   4328      Use "mail" as the short name for "rfc822Mailbox" according to RFC2798;
   4329      therefore remove "mail" short name for "internet 7".
   4330      The OID for unique identifiers in X509 certificates is
   4331      x500UniqueIdentifier, not uniqueIdentifier.
   4332      Some more OID additions. (Michael Bell <michael.bell (a] rz.hu-berlin.de>)
   4333      [Lutz Jaenicke]
   4335   *) Add an "init" command to the ENGINE config module and auto initialize
   4336      ENGINEs. Without any "init" command the ENGINE will be initialized 
   4337      after all ctrl commands have been executed on it. If init=1 the 
   4338      ENGINE is initailized at that point (ctrls before that point are run
   4339      on the uninitialized ENGINE and after on the initialized one). If
   4340      init=0 then the ENGINE will not be iniatialized at all.
   4341      [Steve Henson]
   4343   *) Fix the 'app_verify_callback' interface so that the user-defined
   4344      argument is actually passed to the callback: In the
   4345      SSL_CTX_set_cert_verify_callback() prototype, the callback
   4346      declaration has been changed from
   4347           int (*cb)()
   4348      into
   4349           int (*cb)(X509_STORE_CTX *,void *);
   4350      in ssl_verify_cert_chain (ssl/ssl_cert.c), the call
   4351           i=s->ctx->app_verify_callback(&ctx)
   4352      has been changed into
   4353           i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg).
   4355      To update applications using SSL_CTX_set_cert_verify_callback(),
   4356      a dummy argument can be added to their callback functions.
   4357      [D. K. Smetters <smetters (a] parc.xerox.com>]
   4359   *) Added the '4758cca' ENGINE to support IBM 4758 cards.
   4360      [Maurice Gittens <maurice (a] gittens.nl>, touchups by Geoff Thorpe]
   4362   *) Add and OPENSSL_LOAD_CONF define which will cause
   4363      OpenSSL_add_all_algorithms() to load the openssl.cnf config file.
   4364      This allows older applications to transparently support certain
   4365      OpenSSL features: such as crypto acceleration and dynamic ENGINE loading.
   4366      Two new functions OPENSSL_add_all_algorithms_noconf() which will never
   4367      load the config file and OPENSSL_add_all_algorithms_conf() which will
   4368      always load it have also been added.
   4369      [Steve Henson]
   4371   *) Add the OFB, CFB and CTR (all with 128 bit feedback) to AES.
   4372      Adjust NIDs and EVP layer.
   4373      [Stephen Sprunk <stephen (a] sprunk.org> and Richard Levitte]
   4375   *) Config modules support in openssl utility.
   4377      Most commands now load modules from the config file,
   4378      though in a few (such as version) this isn't done 
   4379      because it couldn't be used for anything.
   4381      In the case of ca and req the config file used is
   4382      the same as the utility itself: that is the -config
   4383      command line option can be used to specify an
   4384      alternative file.
   4385      [Steve Henson]
   4387   *) Move default behaviour from OPENSSL_config(). If appname is NULL
   4388      use "openssl_conf" if filename is NULL use default openssl config file.
   4389      [Steve Henson]
   4391   *) Add an argument to OPENSSL_config() to allow the use of an alternative
   4392      config section name. Add a new flag to tolerate a missing config file
   4393      and move code to CONF_modules_load_file().
   4394      [Steve Henson]
   4396   *) Support for crypto accelerator cards from Accelerated Encryption
   4397      Processing, www.aep.ie.  (Use engine 'aep')
   4398      The support was copied from 0.9.6c [engine] and adapted/corrected
   4399      to work with the new engine framework.
   4400      [AEP Inc. and Richard Levitte]
   4402   *) Support for SureWare crypto accelerator cards from Baltimore
   4403      Technologies.  (Use engine 'sureware')
   4404      The support was copied from 0.9.6c [engine] and adapted
   4405      to work with the new engine framework.
   4406      [Richard Levitte]
   4408   *) Have the CHIL engine fork-safe (as defined by nCipher) and actually
   4409      make the newer ENGINE framework commands for the CHIL engine work.
   4410      [Toomas Kiisk <vix (a] cyber.ee> and Richard Levitte]
   4412   *) Make it possible to produce shared libraries on ReliantUNIX.
   4413      [Robert Dahlem <Robert.Dahlem (a] ffm2.siemens.de> via Richard Levitte]
   4415   *) Add the configuration target debug-linux-ppro.
   4416      Make 'openssl rsa' use the general key loading routines
   4417      implemented in apps.c, and make those routines able to
   4418      handle the key format FORMAT_NETSCAPE and the variant
   4419      FORMAT_IISSGC.
   4420      [Toomas Kiisk <vix (a] cyber.ee> via Richard Levitte]
   4422  *) Fix a crashbug and a logic bug in hwcrhk_load_pubkey().
   4423      [Toomas Kiisk <vix (a] cyber.ee> via Richard Levitte]
   4425   *) Add -keyform to rsautl, and document -engine.
   4426      [Richard Levitte, inspired by Toomas Kiisk <vix (a] cyber.ee>]
   4428   *) Change BIO_new_file (crypto/bio/bss_file.c) to use new
   4429      BIO_R_NO_SUCH_FILE error code rather than the generic
   4430      ERR_R_SYS_LIB error code if fopen() fails with ENOENT.
   4431      [Ben Laurie]
   4433   *) Add new functions
   4434           ERR_peek_last_error
   4435           ERR_peek_last_error_line
   4436           ERR_peek_last_error_line_data.
   4437      These are similar to
   4438           ERR_peek_error
   4439           ERR_peek_error_line
   4440           ERR_peek_error_line_data,
   4441      but report on the latest error recorded rather than the first one
   4442      still in the error queue.
   4443      [Ben Laurie, Bodo Moeller]
   4445   *) default_algorithms option in ENGINE config module. This allows things
   4446      like:
   4447      default_algorithms = ALL
   4448      default_algorithms = RSA, DSA, RAND, CIPHERS, DIGESTS
   4449      [Steve Henson]
   4451   *) Prelminary ENGINE config module.
   4452      [Steve Henson]
   4454   *) New experimental application configuration code.
   4455      [Steve Henson]
   4457   *) Change the AES code to follow the same name structure as all other
   4458      symmetric ciphers, and behave the same way.  Move everything to
   4459      the directory crypto/aes, thereby obsoleting crypto/rijndael.
   4460      [Stephen Sprunk <stephen (a] sprunk.org> and Richard Levitte]
   4462   *) SECURITY: remove unsafe setjmp/signal interaction from ui_openssl.c.
   4463      [Ben Laurie and Theo de Raadt]
   4465   *) Add option to output public keys in req command.
   4466      [Massimiliano Pala madwolf (a] openca.org]
   4468   *) Use wNAFs in EC_POINTs_mul() for improved efficiency
   4469      (up to about 10% better than before for P-192 and P-224).
   4470      [Bodo Moeller]
   4472   *) New functions/macros
   4474           SSL_CTX_set_msg_callback(ctx, cb)
   4475           SSL_CTX_set_msg_callback_arg(ctx, arg)
   4476           SSL_set_msg_callback(ssl, cb)
   4477           SSL_set_msg_callback_arg(ssl, arg)
   4479      to request calling a callback function
   4481           void cb(int write_p, int version, int content_type,
   4482                   const void *buf, size_t len, SSL *ssl, void *arg)
   4484      whenever a protocol message has been completely received
   4485      (write_p == 0) or sent (write_p == 1).  Here 'version' is the
   4486      protocol version  according to which the SSL library interprets
   4487      the current protocol message (SSL2_VERSION, SSL3_VERSION, or
   4488      TLS1_VERSION).  'content_type' is 0 in the case of SSL 2.0, or
   4489      the content type as defined in the SSL 3.0/TLS 1.0 protocol
   4490      specification (change_cipher_spec(20), alert(21), handshake(22)).
   4491      'buf' and 'len' point to the actual message, 'ssl' to the
   4492      SSL object, and 'arg' is the application-defined value set by
   4493      SSL[_CTX]_set_msg_callback_arg().
   4495      'openssl s_client' and 'openssl s_server' have new '-msg' options
   4496      to enable a callback that displays all protocol messages.
   4497      [Bodo Moeller]
   4499   *) Change the shared library support so shared libraries are built as
   4500      soon as the corresponding static library is finished, and thereby get
   4501      openssl and the test programs linked against the shared library.
   4502      This still only happens when the keyword "shard" has been given to
   4503      the configuration scripts.
   4505      NOTE: shared library support is still an experimental thing, and
   4506      backward binary compatibility is still not guaranteed.
   4507      ["Maciej W. Rozycki" <macro (a] ds2.pg.gda.pl> and Richard Levitte]
   4509   *) Add support for Subject Information Access extension.
   4510      [Peter Sylvester <Peter.Sylvester (a] EdelWeb.fr>]
   4512   *) Make BUF_MEM_grow() behaviour more consistent: Initialise to zero
   4513      additional bytes when new memory had to be allocated, not just
   4514      when reusing an existing buffer.
   4515      [Bodo Moeller]
   4517   *) New command line and configuration option 'utf8' for the req command.
   4518      This allows field values to be specified as UTF8 strings.
   4519      [Steve Henson]
   4521   *) Add -multi and -mr options to "openssl speed" - giving multiple parallel
   4522      runs for the former and machine-readable output for the latter.
   4523      [Ben Laurie]
   4525   *) Add '-noemailDN' option to 'openssl ca'.  This prevents inclusion
   4526      of the e-mail address in the DN (i.e., it will go into a certificate
   4527      extension only).  The new configuration file option 'email_in_dn = no'
   4528      has the same effect.
   4529      [Massimiliano Pala madwolf (a] openca.org]
   4531   *) Change all functions with names starting with des_ to be starting
   4532      with DES_ instead.  Add wrappers that are compatible with libdes,
   4533      but are named _ossl_old_des_*.  Finally, add macros that map the
   4534      des_* symbols to the corresponding _ossl_old_des_* if libdes
   4535      compatibility is desired.  If OpenSSL 0.9.6c compatibility is
   4536      desired, the des_* symbols will be mapped to DES_*, with one
   4537      exception.
   4539      Since we provide two compatibility mappings, the user needs to
   4540      define the macro OPENSSL_DES_LIBDES_COMPATIBILITY if libdes
   4541      compatibility is desired.  The default (i.e., when that macro
   4542      isn't defined) is OpenSSL 0.9.6c compatibility.
   4544      There are also macros that enable and disable the support of old
   4545      des functions altogether.  Those are OPENSSL_ENABLE_OLD_DES_SUPPORT
   4546      and OPENSSL_DISABLE_OLD_DES_SUPPORT.  If none or both of those
   4547      are defined, the default will apply: to support the old des routines.
   4549      In either case, one must include openssl/des.h to get the correct
   4550      definitions.  Do not try to just include openssl/des_old.h, that
   4551      won't work.
   4553      NOTE: This is a major break of an old API into a new one.  Software
   4554      authors are encouraged to switch to the DES_ style functions.  Some
   4555      time in the future, des_old.h and the libdes compatibility functions
   4556      will be disable (i.e. OPENSSL_DISABLE_OLD_DES_SUPPORT will be the
   4557      default), and then completely removed.
   4558      [Richard Levitte]
   4560   *) Test for certificates which contain unsupported critical extensions.
   4561      If such a certificate is found during a verify operation it is 
   4562      rejected by default: this behaviour can be overridden by either
   4563      handling the new error X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION or
   4564      by setting the verify flag X509_V_FLAG_IGNORE_CRITICAL. A new function
   4565      X509_supported_extension() has also been added which returns 1 if a
   4566      particular extension is supported.
   4567      [Steve Henson]
   4569   *) Modify the behaviour of EVP cipher functions in similar way to digests
   4570      to retain compatibility with existing code.
   4571      [Steve Henson]
   4573   *) Modify the behaviour of EVP_DigestInit() and EVP_DigestFinal() to retain
   4574      compatibility with existing code. In particular the 'ctx' parameter does
   4575      not have to be to be initialized before the call to EVP_DigestInit() and
   4576      it is tidied up after a call to EVP_DigestFinal(). New function
   4577      EVP_DigestFinal_ex() which does not tidy up the ctx. Similarly function
   4578      EVP_MD_CTX_copy() changed to not require the destination to be
   4579      initialized valid and new function EVP_MD_CTX_copy_ex() added which
   4580      requires the destination to be valid.
   4582      Modify all the OpenSSL digest calls to use EVP_DigestInit_ex(),
   4583      EVP_DigestFinal_ex() and EVP_MD_CTX_copy_ex().
   4584      [Steve Henson]
   4586   *) Change ssl3_get_message (ssl/s3_both.c) and the functions using it
   4587      so that complete 'Handshake' protocol structures are kept in memory
   4588      instead of overwriting 'msg_type' and 'length' with 'body' data.
   4589      [Bodo Moeller]
   4591   *) Add an implementation of SSL_add_dir_cert_subjects_to_stack for Win32.
   4592      [Massimo Santin via Richard Levitte]
   4594   *) Major restructuring to the underlying ENGINE code. This includes
   4595      reduction of linker bloat, separation of pure "ENGINE" manipulation
   4596      (initialisation, etc) from functionality dealing with implementations
   4597      of specific crypto iterfaces. This change also introduces integrated
   4598      support for symmetric ciphers and digest implementations - so ENGINEs
   4599      can now accelerate these by providing EVP_CIPHER and EVP_MD
   4600      implementations of their own. This is detailed in crypto/engine/README
   4601      as it couldn't be adequately described here. However, there are a few
   4602      API changes worth noting - some RSA, DSA, DH, and RAND functions that
   4603      were changed in the original introduction of ENGINE code have now
   4604      reverted back - the hooking from this code to ENGINE is now a good
   4605      deal more passive and at run-time, operations deal directly with
   4606      RSA_METHODs, DSA_METHODs (etc) as they did before, rather than
   4607      dereferencing through an ENGINE pointer any more. Also, the ENGINE
   4608      functions dealing with BN_MOD_EXP[_CRT] handlers have been removed -
   4609      they were not being used by the framework as there is no concept of a
   4610      BIGNUM_METHOD and they could not be generalised to the new
   4611      'ENGINE_TABLE' mechanism that underlies the new code. Similarly,
   4612      ENGINE_cpy() has been removed as it cannot be consistently defined in
   4613      the new code.
   4614      [Geoff Thorpe]
   4616   *) Change ASN1_GENERALIZEDTIME_check() to allow fractional seconds.
   4617      [Steve Henson]
   4619   *) Change mkdef.pl to sort symbols that get the same entry number,
   4620      and make sure the automatically generated functions ERR_load_*
   4621      become part of libeay.num as well.
   4622      [Richard Levitte]
   4624   *) New function SSL_renegotiate_pending().  This returns true once
   4625      renegotiation has been requested (either SSL_renegotiate() call
   4626      or HelloRequest/ClientHello receveived from the peer) and becomes
   4627      false once a handshake has been completed.
   4628      (For servers, SSL_renegotiate() followed by SSL_do_handshake()
   4629      sends a HelloRequest, but does not ensure that a handshake takes
   4630      place.  SSL_renegotiate_pending() is useful for checking if the
   4631      client has followed the request.)
   4632      [Bodo Moeller]
   4635      By default, clients may request session resumption even during
   4636      renegotiation (if session ID contexts permit); with this option,
   4637      session resumption is possible only in the first handshake.
   4639      SSL_OP_ALL is now 0x00000FFFL instead of 0x000FFFFFL.  This makes
   4640      more bits available for options that should not be part of
   4642      [Bodo Moeller]
   4644   *) Add some demos for certificate and certificate request creation.
   4645      [Steve Henson]
   4647   *) Make maximum certificate chain size accepted from the peer application
   4648      settable (SSL*_get/set_max_cert_list()), as proposed by
   4649      "Douglas E. Engert" <deengert (a] anl.gov>.
   4650      [Lutz Jaenicke]
   4652   *) Add support for shared libraries for Unixware-7
   4653      (Boyd Lynn Gerber <gerberb (a] zenez.com>).
   4654      [Lutz Jaenicke]
   4656   *) Add a "destroy" handler to ENGINEs that allows structural cleanup to
   4657      be done prior to destruction. Use this to unload error strings from
   4658      ENGINEs that load their own error strings. NB: This adds two new API
   4659      functions to "get" and "set" this destroy handler in an ENGINE.
   4660      [Geoff Thorpe]
   4662   *) Alter all existing ENGINE implementations (except "openssl" and
   4663      "openbsd") to dynamically instantiate their own error strings. This
   4664      makes them more flexible to be built both as statically-linked ENGINEs
   4665      and self-contained shared-libraries loadable via the "dynamic" ENGINE.
   4666      Also, add stub code to each that makes building them as self-contained
   4667      shared-libraries easier (see README.ENGINE).
   4668      [Geoff Thorpe]
   4670   *) Add a "dynamic" ENGINE that provides a mechanism for binding ENGINE
   4671      implementations into applications that are completely implemented in
   4672      self-contained shared-libraries. The "dynamic" ENGINE exposes control
   4673      commands that can be used to configure what shared-library to load and
   4674      to control aspects of the way it is handled. Also, made an update to
   4675      the README.ENGINE file that brings its information up-to-date and
   4676      provides some information and instructions on the "dynamic" ENGINE
   4677      (ie. how to use it, how to build "dynamic"-loadable ENGINEs, etc).
   4678      [Geoff Thorpe]
   4680   *) Make it possible to unload ranges of ERR strings with a new
   4681      "ERR_unload_strings" function.
   4682      [Geoff Thorpe]
   4684   *) Add a copy() function to EVP_MD.
   4685      [Ben Laurie]
   4687   *) Make EVP_MD routines take a context pointer instead of just the
   4688      md_data void pointer.
   4689      [Ben Laurie]
   4691   *) Add flags to EVP_MD and EVP_MD_CTX. EVP_MD_FLAG_ONESHOT indicates
   4692      that the digest can only process a single chunk of data
   4693      (typically because it is provided by a piece of
   4694      hardware). EVP_MD_CTX_FLAG_ONESHOT indicates that the application
   4695      is only going to provide a single chunk of data, and hence the
   4696      framework needn't accumulate the data for oneshot drivers.
   4697      [Ben Laurie]
   4699   *) As with "ERR", make it possible to replace the underlying "ex_data"
   4700      functions. This change also alters the storage and management of global
   4701      ex_data state - it's now all inside ex_data.c and all "class" code (eg.
   4702      RSA, BIO, SSL_CTX, etc) no longer stores its own STACKS and per-class
   4703      index counters. The API functions that use this state have been changed
   4704      to take a "class_index" rather than pointers to the class's local STACK
   4705      and counter, and there is now an API function to dynamically create new
   4706      classes. This centralisation allows us to (a) plug a lot of the
   4707      thread-safety problems that existed, and (b) makes it possible to clean
   4708      up all allocated state using "CRYPTO_cleanup_all_ex_data()". W.r.t. (b)
   4709      such data would previously have always leaked in application code and
   4710      workarounds were in place to make the memory debugging turn a blind eye
   4711      to it. Application code that doesn't use this new function will still
   4712      leak as before, but their memory debugging output will announce it now
   4713      rather than letting it slide.
   4715      Besides the addition of CRYPTO_cleanup_all_ex_data(), another API change
   4716      induced by the "ex_data" overhaul is that X509_STORE_CTX_init() now
   4717      has a return value to indicate success or failure.
   4718      [Geoff Thorpe]
   4720   *) Make it possible to replace the underlying "ERR" functions such that the
   4721      global state (2 LHASH tables and 2 locks) is only used by the "default"
   4722      implementation. This change also adds two functions to "get" and "set"
   4723      the implementation prior to it being automatically set the first time
   4724      any other ERR function takes place. Ie. an application can call "get",
   4725      pass the return value to a module it has just loaded, and that module
   4726      can call its own "set" function using that value. This means the
   4727      module's "ERR" operations will use (and modify) the error state in the
   4728      application and not in its own statically linked copy of OpenSSL code.
   4729      [Geoff Thorpe]
   4731   *) Give DH, DSA, and RSA types their own "**_up_ref()" function to increment
   4732      reference counts. This performs normal REF_PRINT/REF_CHECK macros on
   4733      the operation, and provides a more encapsulated way for external code
   4734      (crypto/evp/ and ssl/) to do this. Also changed the evp and ssl code
   4735      to use these functions rather than manually incrementing the counts.
   4737      Also rename "DSO_up()" function to more descriptive "DSO_up_ref()".
   4738      [Geoff Thorpe]
   4740   *) Add EVP test program.
   4741      [Ben Laurie]
   4743   *) Add symmetric cipher support to ENGINE. Expect the API to change!
   4744      [Ben Laurie]
   4746   *) New CRL functions: X509_CRL_set_version(), X509_CRL_set_issuer_name()
   4747      X509_CRL_set_lastUpdate(), X509_CRL_set_nextUpdate(), X509_CRL_sort(),
   4748      X509_REVOKED_set_serialNumber(), and X509_REVOKED_set_revocationDate().
   4749      These allow a CRL to be built without having to access X509_CRL fields
   4750      directly. Modify 'ca' application to use new functions.
   4751      [Steve Henson]
   4753   *) Move SSL_OP_TLS_ROLLBACK_BUG out of the SSL_OP_ALL list of recommended
   4754      bug workarounds. Rollback attack detection is a security feature.
   4755      The problem will only arise on OpenSSL servers when TLSv1 is not
   4756      available (sslv3_server_method() or SSL_OP_NO_TLSv1).
   4757      Software authors not wanting to support TLSv1 will have special reasons
   4758      for their choice and can explicitly enable this option.
   4759      [Bodo Moeller, Lutz Jaenicke]
   4761   *) Rationalise EVP so it can be extended: don't include a union of
   4762      cipher/digest structures, add init/cleanup functions for EVP_MD_CTX
   4763      (similar to those existing for EVP_CIPHER_CTX).
   4764      Usage example:
   4766          EVP_MD_CTX md;
   4768          EVP_MD_CTX_init(&md);             /* new function call */
   4769          EVP_DigestInit(&md, EVP_sha1());
   4770          EVP_DigestUpdate(&md, in, len);
   4771          EVP_DigestFinal(&md, out, NULL);
   4772          EVP_MD_CTX_cleanup(&md);          /* new function call */
   4774      [Ben Laurie]
   4776   *) Make DES key schedule conform to the usual scheme, as well as
   4777      correcting its structure. This means that calls to DES functions
   4778      now have to pass a pointer to a des_key_schedule instead of a
   4779      plain des_key_schedule (which was actually always a pointer
   4780      anyway): E.g.,
   4782          des_key_schedule ks;
   4784 	 des_set_key_checked(..., &ks);
   4785 	 des_ncbc_encrypt(..., &ks, ...);
   4787      (Note that a later change renames 'des_...' into 'DES_...'.)
   4788      [Ben Laurie]
   4790   *) Initial reduction of linker bloat: the use of some functions, such as
   4791      PEM causes large amounts of unused functions to be linked in due to
   4792      poor organisation. For example pem_all.c contains every PEM function
   4793      which has a knock on effect of linking in large amounts of (unused)
   4794      ASN1 code. Grouping together similar functions and splitting unrelated
   4795      functions prevents this.
   4796      [Steve Henson]
   4798   *) Cleanup of EVP macros.
   4799      [Ben Laurie]
   4801   *) Change historical references to {NID,SN,LN}_des_ede and ede3 to add the
   4802      correct _ecb suffix.
   4803      [Ben Laurie]
   4805   *) Add initial OCSP responder support to ocsp application. The
   4806      revocation information is handled using the text based index
   4807      use by the ca application. The responder can either handle
   4808      requests generated internally, supplied in files (for example
   4809      via a CGI script) or using an internal minimal server.
   4810      [Steve Henson]
   4812   *) Add configuration choices to get zlib compression for TLS.
   4813      [Richard Levitte]
   4815   *) Changes to Kerberos SSL for RFC 2712 compliance:
   4816      1.  Implemented real KerberosWrapper, instead of just using
   4817          KRB5 AP_REQ message.  [Thanks to Simon Wilkinson <sxw (a] sxw.org.uk>]
   4818      2.  Implemented optional authenticator field of KerberosWrapper.
   4820      Added openssl-style ASN.1 macros for Kerberos ticket, ap_req,
   4821      and authenticator structs; see crypto/krb5/.
   4823      Generalized Kerberos calls to support multiple Kerberos libraries.
   4824      [Vern Staats <staatsvr (a] asc.hpc.mil>,
   4825       Jeffrey Altman <jaltman (a] columbia.edu>
   4826       via Richard Levitte]
   4828   *) Cause 'openssl speed' to use fully hard-coded DSA keys as it
   4829      already does with RSA. testdsa.h now has 'priv_key/pub_key'
   4830      values for each of the key sizes rather than having just
   4831      parameters (and 'speed' generating keys each time).
   4832      [Geoff Thorpe]
   4834   *) Speed up EVP routines.
   4835      Before:
   4836 encrypt
   4837 type              8 bytes     64 bytes    256 bytes   1024 bytes   8192 bytes
   4838 des-cbc           4408.85k     5560.51k     5778.46k     5862.20k     5825.16k
   4839 des-cbc           4389.55k     5571.17k     5792.23k     5846.91k     5832.11k
   4840 des-cbc           4394.32k     5575.92k     5807.44k     5848.37k     5841.30k
   4841 decrypt
   4842 des-cbc           3482.66k     5069.49k     5496.39k     5614.16k     5639.28k
   4843 des-cbc           3480.74k     5068.76k     5510.34k     5609.87k     5635.52k
   4844 des-cbc           3483.72k     5067.62k     5504.60k     5708.01k     5724.80k
   4845      After:
   4846 encrypt
   4847 des-cbc           4660.16k     5650.19k     5807.19k     5827.13k     5783.32k
   4848 decrypt
   4849 des-cbc           3624.96k     5258.21k     5530.91k     5624.30k     5628.26k
   4850      [Ben Laurie]
   4852   *) Added the OS2-EMX target.
   4853      ["Brian Havard" <brianh (a] kheldar.apana.org.au> and Richard Levitte]
   4855   *) Rewrite apps to use NCONF routines instead of the old CONF. New functions
   4856      to support NCONF routines in extension code. New function CONF_set_nconf()
   4857      to allow functions which take an NCONF to also handle the old LHASH
   4858      structure: this means that the old CONF compatible routines can be
   4859      retained (in particular wrt extensions) without having to duplicate the
   4860      code. New function X509V3_add_ext_nconf_sk to add extensions to a stack.
   4861      [Steve Henson]
   4863   *) Enhance the general user interface with mechanisms for inner control
   4864      and with possibilities to have yes/no kind of prompts.
   4865      [Richard Levitte]
   4867   *) Change all calls to low level digest routines in the library and
   4868      applications to use EVP. Add missing calls to HMAC_cleanup() and
   4869      don't assume HMAC_CTX can be copied using memcpy().
   4870      [Verdon Walker <VWalker (a] novell.com>, Steve Henson]
   4872   *) Add the possibility to control engines through control names but with
   4873      arbitrary arguments instead of just a string.
   4874      Change the key loaders to take a UI_METHOD instead of a callback
   4875      function pointer.  NOTE: this breaks binary compatibility with earlier
   4876      versions of OpenSSL [engine].
   4877      Adapt the nCipher code for these new conditions and add a card insertion
   4878      callback.
   4879      [Richard Levitte]
   4881   *) Enhance the general user interface with mechanisms to better support
   4882      dialog box interfaces, application-defined prompts, the possibility
   4883      to use defaults (for example default passwords from somewhere else)
   4884      and interrupts/cancellations.
   4885      [Richard Levitte]
   4887   *) Tidy up PKCS#12 attribute handling. Add support for the CSP name
   4888      attribute in PKCS#12 files, add new -CSP option to pkcs12 utility.
   4889      [Steve Henson]
   4891   *) Fix a memory leak in 'sk_dup()' in the case reallocation fails. (Also
   4892      tidy up some unnecessarily weird code in 'sk_new()').
   4893      [Geoff, reported by Diego Tartara <dtartara (a] novamens.com>]
   4895   *) Change the key loading routines for ENGINEs to use the same kind
   4896      callback (pem_password_cb) as all other routines that need this
   4897      kind of callback.
   4898      [Richard Levitte]
   4900   *) Increase ENTROPY_NEEDED to 32 bytes, as Rijndael can operate with
   4901      256 bit (=32 byte) keys. Of course seeding with more entropy bytes
   4902      than this minimum value is recommended.
   4903      [Lutz Jaenicke]
   4905   *) New random seeder for OpenVMS, using the system process statistics
   4906      that are easily reachable.
   4907      [Richard Levitte]
   4909   *) Windows apparently can't transparently handle global
   4910      variables defined in DLLs. Initialisations such as:
   4912         const ASN1_ITEM *it = &ASN1_INTEGER_it;
   4914      wont compile. This is used by the any applications that need to
   4915      declare their own ASN1 modules. This was fixed by adding the option
   4916      EXPORT_VAR_AS_FN to all Win32 platforms, although this isn't strictly
   4917      needed for static libraries under Win32.
   4918      [Steve Henson]
   4920   *) New functions X509_PURPOSE_set() and X509_TRUST_set() to handle
   4921      setting of purpose and trust fields. New X509_STORE trust and
   4922      purpose functions and tidy up setting in other SSL functions.
   4923      [Steve Henson]
   4925   *) Add copies of X509_STORE_CTX fields and callbacks to X509_STORE
   4926      structure. These are inherited by X509_STORE_CTX when it is 
   4927      initialised. This allows various defaults to be set in the
   4928      X509_STORE structure (such as flags for CRL checking and custom
   4929      purpose or trust settings) for functions which only use X509_STORE_CTX
   4930      internally such as S/MIME.
   4932      Modify X509_STORE_CTX_purpose_inherit() so it only sets purposes and
   4933      trust settings if they are not set in X509_STORE. This allows X509_STORE
   4934      purposes and trust (in S/MIME for example) to override any set by default.
   4936      Add command line options for CRL checking to smime, s_client and s_server
   4937      applications.
   4938      [Steve Henson]
   4940   *) Initial CRL based revocation checking. If the CRL checking flag(s)
   4941      are set then the CRL is looked up in the X509_STORE structure and
   4942      its validity and signature checked, then if the certificate is found
   4943      in the CRL the verify fails with a revoked error.
   4945      Various new CRL related callbacks added to X509_STORE_CTX structure.
   4947      Command line options added to 'verify' application to support this.
   4949      This needs some additional work, such as being able to handle multiple
   4950      CRLs with different times, extension based lookup (rather than just
   4951      by subject name) and ultimately more complete V2 CRL extension
   4952      handling.
   4953      [Steve Henson]
   4955   *) Add a general user interface API (crypto/ui/).  This is designed
   4956      to replace things like des_read_password and friends (backward
   4957      compatibility functions using this new API are provided).
   4958      The purpose is to remove prompting functions from the DES code
   4959      section as well as provide for prompting through dialog boxes in
   4960      a window system and the like.
   4961      [Richard Levitte]
   4963   *) Add "ex_data" support to ENGINE so implementations can add state at a
   4964      per-structure level rather than having to store it globally.
   4965      [Geoff]
   4967   *) Make it possible for ENGINE structures to be copied when retrieved by
   4968      ENGINE_by_id() if the ENGINE specifies a new flag: ENGINE_FLAGS_BY_ID_COPY.
   4969      This causes the "original" ENGINE structure to act like a template,
   4970      analogous to the RSA vs. RSA_METHOD type of separation. Because of this
   4971      operational state can be localised to each ENGINE structure, despite the
   4972      fact they all share the same "methods". New ENGINE structures returned in
   4973      this case have no functional references and the return value is the single
   4974      structural reference. This matches the single structural reference returned
   4975      by ENGINE_by_id() normally, when it is incremented on the pre-existing
   4976      ENGINE structure.
   4977      [Geoff]
   4979   *) Fix ASN1 decoder when decoding type ANY and V_ASN1_OTHER: since this
   4980      needs to match any other type at all we need to manually clear the
   4981      tag cache.
   4982      [Steve Henson]
   4984   *) Changes to the "openssl engine" utility to include;
   4985      - verbosity levels ('-v', '-vv', and '-vvv') that provide information
   4986        about an ENGINE's available control commands.
   4987      - executing control commands from command line arguments using the
   4988        '-pre' and '-post' switches. '-post' is only used if '-t' is
   4989        specified and the ENGINE is successfully initialised. The syntax for
   4990        the individual commands are colon-separated, for example;
   4991 	 openssl engine chil -pre FORK_CHECK:0 -pre SO_PATH:/lib/test.so
   4992      [Geoff]
   4994   *) New dynamic control command support for ENGINEs. ENGINEs can now
   4995      declare their own commands (numbers), names (strings), descriptions,
   4996      and input types for run-time discovery by calling applications. A
   4997      subset of these commands are implicitly classed as "executable"
   4998      depending on their input type, and only these can be invoked through
   4999      the new string-based API function ENGINE_ctrl_cmd_string(). (Eg. this
   5000      can be based on user input, config files, etc). The distinction is
   5001      that "executable" commands cannot return anything other than a boolean
   5002      result and can only support numeric or string input, whereas some
   5003      discoverable commands may only be for direct use through
   5004      ENGINE_ctrl(), eg. supporting the exchange of binary data, function
   5005      pointers, or other custom uses. The "executable" commands are to
   5006      support parameterisations of ENGINE behaviour that can be
   5007      unambiguously defined by ENGINEs and used consistently across any
   5008      OpenSSL-based application. Commands have been added to all the
   5009      existing hardware-supporting ENGINEs, noticeably "SO_PATH" to allow
   5010      control over shared-library paths without source code alterations.
   5011      [Geoff]
   5013   *) Changed all ENGINE implementations to dynamically allocate their
   5014      ENGINEs rather than declaring them statically. Apart from this being
   5015      necessary with the removal of the ENGINE_FLAGS_MALLOCED distinction,
   5016      this also allows the implementations to compile without using the
   5017      internal engine_int.h header.
   5018      [Geoff]
   5020   *) Minor adjustment to "rand" code. RAND_get_rand_method() now returns a
   5021      'const' value. Any code that should be able to modify a RAND_METHOD
   5022      should already have non-const pointers to it (ie. they should only
   5023      modify their own ones).
   5024      [Geoff]
   5026   *) Made a variety of little tweaks to the ENGINE code.
   5027      - "atalla" and "ubsec" string definitions were moved from header files
   5028        to C code. "nuron" string definitions were placed in variables
   5029        rather than hard-coded - allowing parameterisation of these values
   5030        later on via ctrl() commands.
   5031      - Removed unused "#if 0"'d code.
   5032      - Fixed engine list iteration code so it uses ENGINE_free() to release
   5033        structural references.
   5034      - Constified the RAND_METHOD element of ENGINE structures.
   5035      - Constified various get/set functions as appropriate and added
   5036        missing functions (including a catch-all ENGINE_cpy that duplicates
   5037        all ENGINE values onto a new ENGINE except reference counts/state).
   5038      - Removed NULL parameter checks in get/set functions. Setting a method
   5039        or function to NULL is a way of cancelling out a previously set
   5040        value.  Passing a NULL ENGINE parameter is just plain stupid anyway
   5041        and doesn't justify the extra error symbols and code.
   5042      - Deprecate the ENGINE_FLAGS_MALLOCED define and move the area for
   5043        flags from engine_int.h to engine.h.
   5044      - Changed prototypes for ENGINE handler functions (init(), finish(),
   5045        ctrl(), key-load functions, etc) to take an (ENGINE*) parameter.
   5046      [Geoff]
   5048   *) Implement binary inversion algorithm for BN_mod_inverse in addition
   5049      to the algorithm using long division.  The binary algorithm can be
   5050      used only if the modulus is odd.  On 32-bit systems, it is faster
   5051      only for relatively small moduli (roughly 20-30% for 128-bit moduli,
   5052      roughly 5-15% for 256-bit moduli), so we use it only for moduli
   5053      up to 450 bits.  In 64-bit environments, the binary algorithm
   5054      appears to be advantageous for much longer moduli; here we use it
   5055      for moduli up to 2048 bits.
   5056      [Bodo Moeller]
   5058   *) Rewrite CHOICE field setting in ASN1_item_ex_d2i(). The old code
   5059      could not support the combine flag in choice fields.
   5060      [Steve Henson]
   5062   *) Add a 'copy_extensions' option to the 'ca' utility. This copies
   5063      extensions from a certificate request to the certificate.
   5064      [Steve Henson]
   5066   *) Allow multiple 'certopt' and 'nameopt' options to be separated
   5067      by commas. Add 'namopt' and 'certopt' options to the 'ca' config
   5068      file: this allows the display of the certificate about to be
   5069      signed to be customised, to allow certain fields to be included
   5070      or excluded and extension details. The old system didn't display
   5071      multicharacter strings properly, omitted fields not in the policy
   5072      and couldn't display additional details such as extensions.
   5073      [Steve Henson]
   5075   *) Function EC_POINTs_mul for multiple scalar multiplication
   5076      of an arbitrary number of elliptic curve points
   5077           \sum scalars[i]*points[i],
   5078      optionally including the generator defined for the EC_GROUP:
   5079           scalar*generator +  \sum scalars[i]*points[i].
   5081      EC_POINT_mul is a simple wrapper function for the typical case
   5082      that the point list has just one item (besides the optional
   5083      generator).
   5084      [Bodo Moeller]
   5086   *) First EC_METHODs for curves over GF(p):
   5088      EC_GFp_simple_method() uses the basic BN_mod_mul and BN_mod_sqr
   5089      operations and provides various method functions that can also
   5090      operate with faster implementations of modular arithmetic.     
   5092      EC_GFp_mont_method() reuses most functions that are part of
   5093      EC_GFp_simple_method, but uses Montgomery arithmetic.
   5095      [Bodo Moeller; point addition and point doubling
   5096      implementation directly derived from source code provided by
   5097      Lenka Fibikova <fibikova (a] exp-math.uni-essen.de>]
   5099   *) Framework for elliptic curves (crypto/ec/ec.h, crypto/ec/ec_lcl.h,
   5100      crypto/ec/ec_lib.c):
   5102      Curves are EC_GROUP objects (with an optional group generator)
   5103      based on EC_METHODs that are built into the library.
   5105      Points are EC_POINT objects based on EC_GROUP objects.
   5107      Most of the framework would be able to handle curves over arbitrary
   5108      finite fields, but as there are no obvious types for fields other
   5109      than GF(p), some functions are limited to that for now.
   5110      [Bodo Moeller]
   5112   *) Add the -HTTP option to s_server.  It is similar to -WWW, but requires
   5113      that the file contains a complete HTTP response.
   5114      [Richard Levitte]
   5116   *) Add the ec directory to mkdef.pl and mkfiles.pl. In mkdef.pl
   5117      change the def and num file printf format specifier from "%-40sXXX"
   5118      to "%-39s XXX". The latter will always guarantee a space after the
   5119      field while the former will cause them to run together if the field
   5120      is 40 of more characters long.
   5121      [Steve Henson]
   5123   *) Constify the cipher and digest 'method' functions and structures
   5124      and modify related functions to take constant EVP_MD and EVP_CIPHER
   5125      pointers.
   5126      [Steve Henson]
   5128   *) Hide BN_CTX structure details in bn_lcl.h instead of publishing them
   5129      in <openssl/bn.h>.  Also further increase BN_CTX_NUM to 32.
   5130      [Bodo Moeller]
   5132   *) Modify EVP_Digest*() routines so they now return values. Although the
   5133      internal software routines can never fail additional hardware versions
   5134      might.
   5135      [Steve Henson]
   5137   *) Clean up crypto/err/err.h and change some error codes to avoid conflicts:
   5139      Previously ERR_R_FATAL was too small and coincided with ERR_LIB_PKCS7
   5140      (= ERR_R_PKCS7_LIB); it is now 64 instead of 32.
   5142      ASN1 error codes
   5143           ERR_R_NESTED_ASN1_ERROR
   5144           ...
   5145           ERR_R_MISSING_ASN1_EOS
   5146      were 4 .. 9, conflicting with
   5147           ERR_LIB_RSA (= ERR_R_RSA_LIB)
   5148           ...
   5149           ERR_LIB_PEM (= ERR_R_PEM_LIB).
   5150      They are now 58 .. 63 (i.e., just below ERR_R_FATAL).
   5152      Add new error code 'ERR_R_INTERNAL_ERROR'.
   5153      [Bodo Moeller]
   5155   *) Don't overuse locks in crypto/err/err.c: For data retrieval, CRYPTO_r_lock
   5156      suffices.
   5157      [Bodo Moeller]
   5159   *) New option '-subj arg' for 'openssl req' and 'openssl ca'.  This
   5160      sets the subject name for a new request or supersedes the
   5161      subject name in a given request. Formats that can be parsed are
   5162           'CN=Some Name, OU=myOU, C=IT'
   5163      and
   5164           'CN=Some Name/OU=myOU/C=IT'.
   5166      Add options '-batch' and '-verbose' to 'openssl req'.
   5167      [Massimiliano Pala <madwolf (a] hackmasters.net>]
   5169   *) Introduce the possibility to access global variables through
   5170      functions on platform were that's the best way to handle exporting
   5171      global variables in shared libraries.  To enable this functionality,
   5172      one must configure with "EXPORT_VAR_AS_FN" or defined the C macro
   5173      "OPENSSL_EXPORT_VAR_AS_FUNCTION" in crypto/opensslconf.h (the latter
   5174      is normally done by Configure or something similar).
   5176      To implement a global variable, use the macro OPENSSL_IMPLEMENT_GLOBAL
   5177      in the source file (foo.c) like this:
   5179 	OPENSSL_IMPLEMENT_GLOBAL(int,foo)=1;
   5180 	OPENSSL_IMPLEMENT_GLOBAL(double,bar);
   5182      To declare a global variable, use the macros OPENSSL_DECLARE_GLOBAL
   5183      and OPENSSL_GLOBAL_REF in the header file (foo.h) like this:
   5185 	OPENSSL_DECLARE_GLOBAL(int,foo);
   5186 	#define foo OPENSSL_GLOBAL_REF(foo)
   5187 	OPENSSL_DECLARE_GLOBAL(double,bar);
   5188 	#define bar OPENSSL_GLOBAL_REF(bar)
   5190      The #defines are very important, and therefore so is including the
   5191      header file everywhere where the defined globals are used.
   5193      The macro OPENSSL_EXPORT_VAR_AS_FUNCTION also affects the definition
   5194      of ASN.1 items, but that structure is a bit different.
   5196      The largest change is in util/mkdef.pl which has been enhanced with
   5197      better and easier to understand logic to choose which symbols should
   5198      go into the Windows .def files as well as a number of fixes and code
   5199      cleanup (among others, algorithm keywords are now sorted
   5200      lexicographically to avoid constant rewrites).
   5201      [Richard Levitte]
   5203   *) In BN_div() keep a copy of the sign of 'num' before writing the
   5204      result to 'rm' because if rm==num the value will be overwritten
   5205      and produce the wrong result if 'num' is negative: this caused
   5206      problems with BN_mod() and BN_nnmod().
   5207      [Steve Henson]
   5209   *) Function OCSP_request_verify(). This checks the signature on an
   5210      OCSP request and verifies the signer certificate. The signer
   5211      certificate is just checked for a generic purpose and OCSP request
   5212      trust settings.
   5213      [Steve Henson]
   5215   *) Add OCSP_check_validity() function to check the validity of OCSP
   5216      responses. OCSP responses are prepared in real time and may only
   5217      be a few seconds old. Simply checking that the current time lies
   5218      between thisUpdate and nextUpdate max reject otherwise valid responses
   5219      caused by either OCSP responder or client clock inaccuracy. Instead
   5220      we allow thisUpdate and nextUpdate to fall within a certain period of
   5221      the current time. The age of the response can also optionally be
   5222      checked. Two new options -validity_period and -status_age added to
   5223      ocsp utility.
   5224      [Steve Henson]
   5226   *) If signature or public key algorithm is unrecognized print out its
   5227      OID rather that just UNKNOWN.
   5228      [Steve Henson]
   5230   *) Change OCSP_cert_to_id() to tolerate a NULL subject certificate and
   5231      OCSP_cert_id_new() a NULL serialNumber. This allows a partial certificate
   5232      ID to be generated from the issuer certificate alone which can then be
   5233      passed to OCSP_id_issuer_cmp().
   5234      [Steve Henson]
   5236   *) New compilation option ASN1_ITEM_FUNCTIONS. This causes the new
   5237      ASN1 modules to export functions returning ASN1_ITEM pointers
   5238      instead of the ASN1_ITEM structures themselves. This adds several
   5239      new macros which allow the underlying ASN1 function/structure to
   5240      be accessed transparently. As a result code should not use ASN1_ITEM
   5241      references directly (such as &X509_it) but instead use the relevant
   5242      macros (such as ASN1_ITEM_rptr(X509)). This option is to allow
   5243      use of the new ASN1 code on platforms where exporting structures
   5244      is problematical (for example in shared libraries) but exporting
   5245      functions returning pointers to structures is not.
   5246      [Steve Henson]
   5248   *) Add support for overriding the generation of SSL/TLS session IDs.
   5249      These callbacks can be registered either in an SSL_CTX or per SSL.
   5250      The purpose of this is to allow applications to control, if they wish,
   5251      the arbitrary values chosen for use as session IDs, particularly as it
   5252      can be useful for session caching in multiple-server environments. A
   5253      command-line switch for testing this (and any client code that wishes
   5254      to use such a feature) has been added to "s_server".
   5255      [Geoff Thorpe, Lutz Jaenicke]
   5257   *) Modify mkdef.pl to recognise and parse preprocessor conditionals
   5258      of the form '#if defined(...) || defined(...) || ...' and
   5259      '#if !defined(...) && !defined(...) && ...'.  This also avoids
   5260      the growing number of special cases it was previously handling.
   5261      [Richard Levitte]
   5263   *) Make all configuration macros available for application by making
   5264      sure they are available in opensslconf.h, by giving them names starting
   5265      with "OPENSSL_" to avoid conflicts with other packages and by making
   5266      sure e_os2.h will cover all platform-specific cases together with
   5267      opensslconf.h.
   5268      Additionally, it is now possible to define configuration/platform-
   5269      specific names (called "system identities").  In the C code, these
   5270      are prefixed with "OPENSSL_SYSNAME_".  e_os2.h will create another
   5271      macro with the name beginning with "OPENSSL_SYS_", which is determined
   5272      from "OPENSSL_SYSNAME_*" or compiler-specific macros depending on
   5273      what is available.
   5274      [Richard Levitte]
   5276   *) New option -set_serial to 'req' and 'x509' this allows the serial
   5277      number to use to be specified on the command line. Previously self
   5278      signed certificates were hard coded with serial number 0 and the 
   5279      CA options of 'x509' had to use a serial number in a file which was
   5280      auto incremented.
   5281      [Steve Henson]
   5283   *) New options to 'ca' utility to support V2 CRL entry extensions.
   5284      Currently CRL reason, invalidity date and hold instruction are
   5285      supported. Add new CRL extensions to V3 code and some new objects.
   5286      [Steve Henson]
   5288   *) New function EVP_CIPHER_CTX_set_padding() this is used to
   5289      disable standard block padding (aka PKCS#5 padding) in the EVP
   5290      API, which was previously mandatory. This means that the data is
   5291      not padded in any way and so the total length much be a multiple
   5292      of the block size, otherwise an error occurs.
   5293      [Steve Henson]
   5295   *) Initial (incomplete) OCSP SSL support.
   5296      [Steve Henson]
   5298   *) New function OCSP_parse_url(). This splits up a URL into its host,
   5299      port and path components: primarily to parse OCSP URLs. New -url
   5300      option to ocsp utility.
   5301      [Steve Henson]
   5303   *) New nonce behavior. The return value of OCSP_check_nonce() now 
   5304      reflects the various checks performed. Applications can decide
   5305      whether to tolerate certain situations such as an absent nonce
   5306      in a response when one was present in a request: the ocsp application
   5307      just prints out a warning. New function OCSP_add1_basic_nonce()
   5308      this is to allow responders to include a nonce in a response even if
   5309      the request is nonce-less.
   5310      [Steve Henson]
   5312   *) Disable stdin buffering in load_cert (apps/apps.c) so that no certs are
   5313      skipped when using openssl x509 multiple times on a single input file,
   5314      e.g. "(openssl x509 -out cert1; openssl x509 -out cert2) <certs".
   5315      [Bodo Moeller]
   5317   *) Make ASN1_UTCTIME_set_string() and ASN1_GENERALIZEDTIME_set_string()
   5318      set string type: to handle setting ASN1_TIME structures. Fix ca
   5319      utility to correctly initialize revocation date of CRLs.
   5320      [Steve Henson]
   5322   *) New option SSL_OP_CIPHER_SERVER_PREFERENCE allows the server to override
   5323      the clients preferred ciphersuites and rather use its own preferences.
   5324      Should help to work around M$ SGC (Server Gated Cryptography) bug in
   5325      Internet Explorer by ensuring unchanged hash method during stepup.
   5326      (Also replaces the broken/deactivated SSL_OP_NON_EXPORT_FIRST option.)
   5327      [Lutz Jaenicke]
   5329   *) Make mkdef.pl recognise all DECLARE_ASN1 macros, change rijndael
   5330      to aes and add a new 'exist' option to print out symbols that don't
   5331      appear to exist.
   5332      [Steve Henson]
   5334   *) Additional options to ocsp utility to allow flags to be set and
   5335      additional certificates supplied.
   5336      [Steve Henson]
   5338   *) Add the option -VAfile to 'openssl ocsp', so the user can give the
   5339      OCSP client a number of certificate to only verify the response
   5340      signature against.
   5341      [Richard Levitte]
   5343   *) Update Rijndael code to version 3.0 and change EVP AES ciphers to
   5344      handle the new API. Currently only ECB, CBC modes supported. Add new
   5345      AES OIDs.
   5347      Add TLS AES ciphersuites as described in RFC3268, "Advanced
   5348      Encryption Standard (AES) Ciphersuites for Transport Layer
   5349      Security (TLS)".  (In beta versions of OpenSSL 0.9.7, these were
   5350      not enabled by default and were not part of the "ALL" ciphersuite
   5351      alias because they were not yet official; they could be
   5352      explicitly requested by specifying the "AESdraft" ciphersuite
   5353      group alias.  In the final release of OpenSSL 0.9.7, the group
   5354      alias is called "AES" and is part of "ALL".)
   5355      [Ben Laurie, Steve  Henson, Bodo Moeller]
   5357   *) New function OCSP_copy_nonce() to copy nonce value (if present) from
   5358      request to response.
   5359      [Steve Henson]
   5361   *) Functions for OCSP responders. OCSP_request_onereq_count(),
   5362      OCSP_request_onereq_get0(), OCSP_onereq_get0_id() and OCSP_id_get0_info()
   5363      extract information from a certificate request. OCSP_response_create()
   5364      creates a response and optionally adds a basic response structure.
   5365      OCSP_basic_add1_status() adds a complete single response to a basic
   5366      response and returns the OCSP_SINGLERESP structure just added (to allow
   5367      extensions to be included for example). OCSP_basic_add1_cert() adds a
   5368      certificate to a basic response and OCSP_basic_sign() signs a basic
   5369      response with various flags. New helper functions ASN1_TIME_check()
   5370      (checks validity of ASN1_TIME structure) and ASN1_TIME_to_generalizedtime()
   5371      (converts ASN1_TIME to GeneralizedTime).
   5372      [Steve Henson]
   5374   *) Various new functions. EVP_Digest() combines EVP_Digest{Init,Update,Final}()
   5375      in a single operation. X509_get0_pubkey_bitstr() extracts the public_key
   5376      structure from a certificate. X509_pubkey_digest() digests the public_key
   5377      contents: this is used in various key identifiers. 
   5378      [Steve Henson]
   5380   *) Make sk_sort() tolerate a NULL argument.
   5381      [Steve Henson reported by Massimiliano Pala <madwolf (a] comune.modena.it>]
   5383   *) New OCSP verify flag OCSP_TRUSTOTHER. When set the "other" certificates
   5384      passed by the function are trusted implicitly. If any of them signed the
   5385      response then it is assumed to be valid and is not verified.
   5386      [Steve Henson]
   5388   *) In PKCS7_set_type() initialise content_type in PKCS7_ENC_CONTENT
   5389      to data. This was previously part of the PKCS7 ASN1 code. This
   5390      was causing problems with OpenSSL created PKCS#12 and PKCS#7 structures.
   5391      [Steve Henson, reported by Kenneth R. Robinette
   5392 				<support (a] securenetterm.com>]
   5394   *) Add CRYPTO_push_info() and CRYPTO_pop_info() calls to new ASN1
   5395      routines: without these tracing memory leaks is very painful.
   5396      Fix leaks in PKCS12 and PKCS7 routines.
   5397      [Steve Henson]
   5399   *) Make X509_time_adj() cope with the new behaviour of ASN1_TIME_new().
   5400      Previously it initialised the 'type' argument to V_ASN1_UTCTIME which
   5401      effectively meant GeneralizedTime would never be used. Now it
   5402      is initialised to -1 but X509_time_adj() now has to check the value
   5403      and use ASN1_TIME_set() if the value is not V_ASN1_UTCTIME or
   5404      V_ASN1_GENERALIZEDTIME, without this it always uses GeneralizedTime.
   5405      [Steve Henson, reported by Kenneth R. Robinette
   5406 				<support (a] securenetterm.com>]
   5408   *) Fixes to BN_to_ASN1_INTEGER when bn is zero. This would previously
   5409      result in a zero length in the ASN1_INTEGER structure which was
   5410      not consistent with the structure when d2i_ASN1_INTEGER() was used
   5411      and would cause ASN1_INTEGER_cmp() to fail. Enhance s2i_ASN1_INTEGER()
   5412      to cope with hex and negative integers. Fix bug in i2a_ASN1_INTEGER()
   5413      where it did not print out a minus for negative ASN1_INTEGER.
   5414      [Steve Henson]
   5416   *) Add summary printout to ocsp utility. The various functions which
   5417      convert status values to strings have been renamed to:
   5418      OCSP_response_status_str(), OCSP_cert_status_str() and
   5419      OCSP_crl_reason_str() and are no longer static. New options
   5420      to verify nonce values and to disable verification. OCSP response
   5421      printout format cleaned up.
   5422      [Steve Henson]
   5424   *) Add additional OCSP certificate checks. These are those specified
   5425      in RFC2560. This consists of two separate checks: the CA of the
   5426      certificate being checked must either be the OCSP signer certificate
   5427      or the issuer of the OCSP signer certificate. In the latter case the
   5428      OCSP signer certificate must contain the OCSP signing extended key
   5429      usage. This check is performed by attempting to match the OCSP
   5430      signer or the OCSP signer CA to the issuerNameHash and issuerKeyHash
   5431      in the OCSP_CERTID structures of the response.
   5432      [Steve Henson]
   5434   *) Initial OCSP certificate verification added to OCSP_basic_verify()
   5435      and related routines. This uses the standard OpenSSL certificate
   5436      verify routines to perform initial checks (just CA validity) and
   5437      to obtain the certificate chain. Then additional checks will be
   5438      performed on the chain. Currently the root CA is checked to see
   5439      if it is explicitly trusted for OCSP signing. This is used to set
   5440      a root CA as a global signing root: that is any certificate that
   5441      chains to that CA is an acceptable OCSP signing certificate.
   5442      [Steve Henson]
   5444   *) New '-extfile ...' option to 'openssl ca' for reading X.509v3
   5445      extensions from a separate configuration file.
   5446      As when reading extensions from the main configuration file,
   5447      the '-extensions ...' option may be used for specifying the
   5448      section to use.
   5449      [Massimiliano Pala <madwolf (a] comune.modena.it>]
   5451   *) New OCSP utility. Allows OCSP requests to be generated or
   5452      read. The request can be sent to a responder and the output
   5453      parsed, outputed or printed in text form. Not complete yet:
   5454      still needs to check the OCSP response validity.
   5455      [Steve Henson]
   5457   *) New subcommands for 'openssl ca':
   5458      'openssl ca -status <serial>' prints the status of the cert with
   5459      the given serial number (according to the index file).
   5460      'openssl ca -updatedb' updates the expiry status of certificates
   5461      in the index file.
   5462      [Massimiliano Pala <madwolf (a] comune.modena.it>]
   5464   *) New '-newreq-nodes' command option to CA.pl.  This is like
   5465      '-newreq', but calls 'openssl req' with the '-nodes' option
   5466      so that the resulting key is not encrypted.
   5467      [Damien Miller <djm (a] mindrot.org>]
   5469   *) New configuration for the GNU Hurd.
   5470      [Jonathan Bartlett <johnnyb (a] wolfram.com> via Richard Levitte]
   5472   *) Initial code to implement OCSP basic response verify. This
   5473      is currently incomplete. Currently just finds the signer's
   5474      certificate and verifies the signature on the response.
   5475      [Steve Henson]
   5477   *) New SSLeay_version code SSLEAY_DIR to determine the compiled-in
   5478      value of OPENSSLDIR.  This is available via the new '-d' option
   5479      to 'openssl version', and is also included in 'openssl version -a'.
   5480      [Bodo Moeller]
   5482   *) Allowing defining memory allocation callbacks that will be given
   5483      file name and line number information in additional arguments
   5484      (a const char* and an int).  The basic functionality remains, as
   5485      well as the original possibility to just replace malloc(),
   5486      realloc() and free() by functions that do not know about these
   5487      additional arguments.  To register and find out the current
   5488      settings for extended allocation functions, the following
   5489      functions are provided:
   5491 	CRYPTO_set_mem_ex_functions
   5492 	CRYPTO_set_locked_mem_ex_functions
   5493 	CRYPTO_get_mem_ex_functions
   5494 	CRYPTO_get_locked_mem_ex_functions
   5496      These work the same way as CRYPTO_set_mem_functions and friends.
   5497      CRYPTO_get_[locked_]mem_functions now writes 0 where such an
   5498      extended allocation function is enabled.
   5499      Similarly, CRYPTO_get_[locked_]mem_ex_functions writes 0 where
   5500      a conventional allocation function is enabled.
   5501      [Richard Levitte, Bodo Moeller]
   5503   *) Finish off removing the remaining LHASH function pointer casts.
   5504      There should no longer be any prototype-casting required when using
   5505      the LHASH abstraction, and any casts that remain are "bugs". See
   5506      the callback types and macros at the head of lhash.h for details
   5507      (and "OBJ_cleanup" in crypto/objects/obj_dat.c as an example).
   5508      [Geoff Thorpe]
   5510   *) Add automatic query of EGD sockets in RAND_poll() for the unix variant.
   5511      If /dev/[u]random devices are not available or do not return enough
   5512      entropy, EGD style sockets (served by EGD or PRNGD) will automatically
   5513      be queried.
   5514      The locations /var/run/egd-pool, /dev/egd-pool, /etc/egd-pool, and
   5515      /etc/entropy will be queried once each in this sequence, quering stops
   5516      when enough entropy was collected without querying more sockets.
   5517      [Lutz Jaenicke]
   5519   *) Change the Unix RAND_poll() variant to be able to poll several
   5520      random devices, as specified by DEVRANDOM, until a sufficient amount
   5521      of data has been collected.   We spend at most 10 ms on each file
   5522      (select timeout) and read in non-blocking mode.  DEVRANDOM now
   5523      defaults to the list "/dev/urandom", "/dev/random", "/dev/srandom"
   5524      (previously it was just the string "/dev/urandom"), so on typical
   5525      platforms the 10 ms delay will never occur.
   5526      Also separate out the Unix variant to its own file, rand_unix.c.
   5527      For VMS, there's a currently-empty rand_vms.c.
   5528      [Richard Levitte]
   5530   *) Move OCSP client related routines to ocsp_cl.c. These
   5531      provide utility functions which an application needing
   5532      to issue a request to an OCSP responder and analyse the
   5533      response will typically need: as opposed to those which an
   5534      OCSP responder itself would need which will be added later.
   5536      OCSP_request_sign() signs an OCSP request with an API similar
   5537      to PKCS7_sign(). OCSP_response_status() returns status of OCSP
   5538      response. OCSP_response_get1_basic() extracts basic response
   5539      from response. OCSP_resp_find_status(): finds and extracts status
   5540      information from an OCSP_CERTID structure (which will be created
   5541      when the request structure is built). These are built from lower
   5542      level functions which work on OCSP_SINGLERESP structures but
   5543      wont normally be used unless the application wishes to examine
   5544      extensions in the OCSP response for example.
   5546      Replace nonce routines with a pair of functions.
   5547      OCSP_request_add1_nonce() adds a nonce value and optionally
   5548      generates a random value. OCSP_check_nonce() checks the
   5549      validity of the nonce in an OCSP response.
   5550      [Steve Henson]
   5552   *) Change function OCSP_request_add() to OCSP_request_add0_id().
   5553      This doesn't copy the supplied OCSP_CERTID and avoids the
   5554      need to free up the newly created id. Change return type
   5555      to OCSP_ONEREQ to return the internal OCSP_ONEREQ structure.
   5556      This can then be used to add extensions to the request.
   5557      Deleted OCSP_request_new(), since most of its functionality
   5558      is now in OCSP_REQUEST_new() (and the case insensitive name
   5559      clash) apart from the ability to set the request name which
   5560      will be added elsewhere.
   5561      [Steve Henson]
   5563   *) Update OCSP API. Remove obsolete extensions argument from
   5564      various functions. Extensions are now handled using the new
   5565      OCSP extension code. New simple OCSP HTTP function which 
   5566      can be used to send requests and parse the response.
   5567      [Steve Henson]
   5569   *) Fix the PKCS#7 (S/MIME) code to work with new ASN1. Two new
   5570      ASN1_ITEM structures help with sign and verify. PKCS7_ATTR_SIGN
   5571      uses the special reorder version of SET OF to sort the attributes
   5572      and reorder them to match the encoded order. This resolves a long
   5573      standing problem: a verify on a PKCS7 structure just after signing
   5574      it used to fail because the attribute order did not match the
   5575      encoded order. PKCS7_ATTR_VERIFY does not reorder the attributes:
   5576      it uses the received order. This is necessary to tolerate some broken
   5577      software that does not order SET OF. This is handled by encoding
   5578      as a SEQUENCE OF but using implicit tagging (with UNIVERSAL class)
   5579      to produce the required SET OF.
   5580      [Steve Henson]
   5582   *) Have mk1mf.pl generate the macros OPENSSL_BUILD_SHLIBCRYPTO and
   5583      OPENSSL_BUILD_SHLIBSSL and use them appropriately in the header
   5584      files to get correct declarations of the ASN.1 item variables.
   5585      [Richard Levitte]
   5587   *) Rewrite of PKCS#12 code to use new ASN1 functionality. Replace many
   5588      PKCS#12 macros with real functions. Fix two unrelated ASN1 bugs:
   5589      asn1_check_tlen() would sometimes attempt to use 'ctx' when it was
   5590      NULL and ASN1_TYPE was not dereferenced properly in asn1_ex_c2i().
   5591      New ASN1 macro: DECLARE_ASN1_ITEM() which just declares the relevant
   5592      ASN1_ITEM and no wrapper functions.
   5593      [Steve Henson]
   5595   *) New functions or ASN1_item_d2i_fp() and ASN1_item_d2i_bio(). These
   5596      replace the old function pointer based I/O routines. Change most of
   5597      the *_d2i_bio() and *_d2i_fp() functions to use these.
   5598      [Steve Henson]
   5600   *) Enhance mkdef.pl to be more accepting about spacing in C preprocessor
   5601      lines, recognice more "algorithms" that can be deselected, and make
   5602      it complain about algorithm deselection that isn't recognised.
   5603      [Richard Levitte]
   5605   *) New ASN1 functions to handle dup, sign, verify, digest, pack and
   5606      unpack operations in terms of ASN1_ITEM. Modify existing wrappers
   5607      to use new functions. Add NO_ASN1_OLD which can be set to remove
   5608      some old style ASN1 functions: this can be used to determine if old
   5609      code will still work when these eventually go away.
   5610      [Steve Henson]
   5612   *) New extension functions for OCSP structures, these follow the
   5613      same conventions as certificates and CRLs.
   5614      [Steve Henson]
   5616   *) New function X509V3_add1_i2d(). This automatically encodes and
   5617      adds an extension. Its behaviour can be customised with various
   5618      flags to append, replace or delete. Various wrappers added for
   5619      certifcates and CRLs.
   5620      [Steve Henson]
   5622   *) Fix to avoid calling the underlying ASN1 print routine when
   5623      an extension cannot be parsed. Correct a typo in the
   5624      OCSP_SERVICELOC extension. Tidy up print OCSP format.
   5625      [Steve Henson]
   5627   *) Make mkdef.pl parse some of the ASN1 macros and add apropriate
   5628      entries for variables.
   5629      [Steve Henson]
   5631   *) Add functionality to apps/openssl.c for detecting locking
   5632      problems: As the program is single-threaded, all we have
   5633      to do is register a locking callback using an array for
   5634      storing which locks are currently held by the program.
   5635      [Bodo Moeller]
   5637   *) Use a lock around the call to CRYPTO_get_ex_new_index() in
   5638      SSL_get_ex_data_X509_STORE_idx(), which is used in
   5639      ssl_verify_cert_chain() and thus can be called at any time
   5640      during TLS/SSL handshakes so that thread-safety is essential.
   5641      Unfortunately, the ex_data design is not at all suited
   5642      for multi-threaded use, so it probably should be abolished.
   5643      [Bodo Moeller]
   5645   *) Added Broadcom "ubsec" ENGINE to OpenSSL.
   5646      [Broadcom, tweaked and integrated by Geoff Thorpe]
   5648   *) Move common extension printing code to new function
   5649      X509V3_print_extensions(). Reorganise OCSP print routines and
   5650      implement some needed OCSP ASN1 functions. Add OCSP extensions.
   5651      [Steve Henson]
   5653   *) New function X509_signature_print() to remove duplication in some
   5654      print routines.
   5655      [Steve Henson]
   5657   *) Add a special meaning when SET OF and SEQUENCE OF flags are both
   5658      set (this was treated exactly the same as SET OF previously). This
   5659      is used to reorder the STACK representing the structure to match the
   5660      encoding. This will be used to get round a problem where a PKCS7
   5661      structure which was signed could not be verified because the STACK
   5662      order did not reflect the encoded order.
   5663      [Steve Henson]
   5665   *) Reimplement the OCSP ASN1 module using the new code.
   5666      [Steve Henson]
   5668   *) Update the X509V3 code to permit the use of an ASN1_ITEM structure
   5669      for its ASN1 operations. The old style function pointers still exist
   5670      for now but they will eventually go away.
   5671      [Steve Henson]
   5673   *) Merge in replacement ASN1 code from the ASN1 branch. This almost
   5674      completely replaces the old ASN1 functionality with a table driven
   5675      encoder and decoder which interprets an ASN1_ITEM structure describing
   5676      the ASN1 module. Compatibility with the existing ASN1 API (i2d,d2i) is
   5677      largely maintained. Almost all of the old asn1_mac.h macro based ASN1
   5678      has also been converted to the new form.
   5679      [Steve Henson]
   5681   *) Change BN_mod_exp_recp so that negative moduli are tolerated
   5682      (the sign is ignored).  Similarly, ignore the sign in BN_MONT_CTX_set
   5683      so that BN_mod_exp_mont and BN_mod_exp_mont_word work
   5684      for negative moduli.
   5685      [Bodo Moeller]
   5687   *) Fix BN_uadd and BN_usub: Always return non-negative results instead
   5688      of not touching the result's sign bit.
   5689      [Bodo Moeller]
   5691   *) BN_div bugfix: If the result is 0, the sign (res->neg) must not be
   5692      set.
   5693      [Bodo Moeller]
   5695   *) Changed the LHASH code to use prototypes for callbacks, and created
   5696      macros to declare and implement thin (optionally static) functions
   5697      that provide type-safety and avoid function pointer casting for the
   5698      type-specific callbacks.
   5699      [Geoff Thorpe]
   5701   *) Added Kerberos Cipher Suites to be used with TLS, as written in
   5702      RFC 2712.
   5703      [Veers Staats <staatsvr (a] asc.hpc.mil>,
   5704       Jeffrey Altman <jaltman (a] columbia.edu>, via Richard Levitte]
   5706   *) Reformat the FAQ so the different questions and answers can be divided
   5707      in sections depending on the subject.
   5708      [Richard Levitte]
   5710   *) Have the zlib compression code load ZLIB.DLL dynamically under
   5711      Windows.
   5712      [Richard Levitte]
   5714   *) New function BN_mod_sqrt for computing square roots modulo a prime
   5715      (using the probabilistic Tonelli-Shanks algorithm unless
   5716      p == 3 (mod 4)  or  p == 5 (mod 8),  which are cases that can
   5717      be handled deterministically).
   5718      [Lenka Fibikova <fibikova (a] exp-math.uni-essen.de>, Bodo Moeller]
   5720   *) Make BN_mod_inverse faster by explicitly handling small quotients
   5721      in the Euclid loop. (Speed gain about 20% for small moduli [256 or
   5722      512 bits], about 30% for larger ones [1024 or 2048 bits].)
   5723      [Bodo Moeller]
   5725   *) New function BN_kronecker.
   5726      [Bodo Moeller]
   5728   *) Fix BN_gcd so that it works on negative inputs; the result is
   5729      positive unless both parameters are zero.
   5730      Previously something reasonably close to an infinite loop was
   5731      possible because numbers could be growing instead of shrinking
   5732      in the implementation of Euclid's algorithm.
   5733      [Bodo Moeller]
   5735   *) Fix BN_is_word() and BN_is_one() macros to take into account the
   5736      sign of the number in question.
   5738      Fix BN_is_word(a,w) to work correctly for w == 0.
   5740      The old BN_is_word(a,w) macro is now called BN_abs_is_word(a,w)
   5741      because its test if the absolute value of 'a' equals 'w'.
   5742      Note that BN_abs_is_word does *not* handle w == 0 reliably;
   5743      it exists mostly for use in the implementations of BN_is_zero(),
   5744      BN_is_one(), and BN_is_word().
   5745      [Bodo Moeller]
   5747   *) New function BN_swap.
   5748      [Bodo Moeller]
   5750   *) Use BN_nnmod instead of BN_mod in crypto/bn/bn_exp.c so that
   5751      the exponentiation functions are more likely to produce reasonable
   5752      results on negative inputs.
   5753      [Bodo Moeller]
   5755   *) Change BN_mod_mul so that the result is always non-negative.
   5756      Previously, it could be negative if one of the factors was negative;
   5757      I don't think anyone really wanted that behaviour.
   5758      [Bodo Moeller]
   5760   *) Move BN_mod_... functions into new file crypto/bn/bn_mod.c
   5761      (except for exponentiation, which stays in crypto/bn/bn_exp.c,
   5762      and BN_mod_mul_reciprocal, which stays in crypto/bn/bn_recp.c)
   5763      and add new functions:
   5765           BN_nnmod
   5766           BN_mod_sqr
   5767           BN_mod_add
   5768           BN_mod_add_quick
   5769           BN_mod_sub
   5770           BN_mod_sub_quick
   5771           BN_mod_lshift1
   5772           BN_mod_lshift1_quick
   5773           BN_mod_lshift
   5774           BN_mod_lshift_quick
   5776      These functions always generate non-negative results.
   5778      BN_nnmod otherwise is like BN_mod (if BN_mod computes a remainder  r
   5779      such that  |m| < r < 0,  BN_nnmod will output  rem + |m|  instead).
   5781      BN_mod_XXX_quick(r, a, [b,] m) generates the same result as
   5782      BN_mod_XXX(r, a, [b,] m, ctx), but requires that  a  [and  b]
   5783      be reduced modulo  m.
   5784      [Lenka Fibikova <fibikova (a] exp-math.uni-essen.de>, Bodo Moeller]
   5786 #if 0
   5787      The following entry accidentily appeared in the CHANGES file
   5788      distributed with OpenSSL 0.9.7.  The modifications described in
   5789      it do *not* apply to OpenSSL 0.9.7.
   5791   *) Remove a few calls to bn_wexpand() in BN_sqr() (the one in there
   5792      was actually never needed) and in BN_mul().  The removal in BN_mul()
   5793      required a small change in bn_mul_part_recursive() and the addition
   5794      of the functions bn_cmp_part_words(), bn_sub_part_words() and
   5795      bn_add_part_words(), which do the same thing as bn_cmp_words(),
   5796      bn_sub_words() and bn_add_words() except they take arrays with
   5797      differing sizes.
   5798      [Richard Levitte]
   5799 #endif
   5801   *) In 'openssl passwd', verify passwords read from the terminal
   5802      unless the '-salt' option is used (which usually means that
   5803      verification would just waste user's time since the resulting
   5804      hash is going to be compared with some given password hash)
   5805      or the new '-noverify' option is used.
   5807      This is an incompatible change, but it does not affect
   5808      non-interactive use of 'openssl passwd' (passwords on the command
   5809      line, '-stdin' option, '-in ...' option) and thus should not
   5810      cause any problems.
   5811      [Bodo Moeller]
   5813   *) Remove all references to RSAref, since there's no more need for it.
   5814      [Richard Levitte]
   5816   *) Make DSO load along a path given through an environment variable
   5817      (SHLIB_PATH) with shl_load().
   5818      [Richard Levitte]
   5820   *) Constify the ENGINE code as a result of BIGNUM constification.
   5821      Also constify the RSA code and most things related to it.  In a
   5822      few places, most notable in the depth of the ASN.1 code, ugly
   5823      casts back to non-const were required (to be solved at a later
   5824      time)
   5825      [Richard Levitte]
   5827   *) Make it so the openssl application has all engines loaded by default.
   5828      [Richard Levitte]
   5830   *) Constify the BIGNUM routines a little more.
   5831      [Richard Levitte]
   5833   *) Add the following functions:
   5835 	ENGINE_load_cswift()
   5836 	ENGINE_load_chil()
   5837 	ENGINE_load_atalla()
   5838 	ENGINE_load_nuron()
   5839 	ENGINE_load_builtin_engines()
   5841      That way, an application can itself choose if external engines that
   5842      are built-in in OpenSSL shall ever be used or not.  The benefit is
   5843      that applications won't have to be linked with libdl or other dso
   5844      libraries unless it's really needed.
   5846      Changed 'openssl engine' to load all engines on demand.
   5847      Changed the engine header files to avoid the duplication of some
   5848      declarations (they differed!).
   5849      [Richard Levitte]
   5851   *) 'openssl engine' can now list capabilities.
   5852      [Richard Levitte]
   5854   *) Better error reporting in 'openssl engine'.
   5855      [Richard Levitte]
   5857   *) Never call load_dh_param(NULL) in s_server.
   5858      [Bodo Moeller]
   5860   *) Add engine application.  It can currently list engines by name and
   5861      identity, and test if they are actually available.
   5862      [Richard Levitte]
   5864   *) Improve RPM specification file by forcing symbolic linking and making
   5865      sure the installed documentation is also owned by root.root.
   5866      [Damien Miller <djm (a] mindrot.org>]
   5868   *) Give the OpenSSL applications more possibilities to make use of
   5869      keys (public as well as private) handled by engines.
   5870      [Richard Levitte]
   5872   *) Add OCSP code that comes from CertCo.
   5873      [Richard Levitte]
   5875   *) Add VMS support for the Rijndael code.
   5876      [Richard Levitte]
   5878   *) Added untested support for Nuron crypto accelerator.
   5879      [Ben Laurie]
   5881   *) Add support for external cryptographic devices.  This code was
   5882      previously distributed separately as the "engine" branch.
   5883      [Geoff Thorpe, Richard Levitte]
   5885   *) Rework the filename-translation in the DSO code. It is now possible to
   5886      have far greater control over how a "name" is turned into a filename
   5887      depending on the operating environment and any oddities about the
   5888      different shared library filenames on each system.
   5889      [Geoff Thorpe]
   5891   *) Support threads on FreeBSD-elf in Configure.
   5892      [Richard Levitte]
   5894   *) Fix for SHA1 assembly problem with MASM: it produces
   5895      warnings about corrupt line number information when assembling
   5896      with debugging information. This is caused by the overlapping
   5897      of two sections.
   5898      [Bernd Matthes <mainbug (a] celocom.de>, Steve Henson]
   5900   *) NCONF changes.
   5901      NCONF_get_number() has no error checking at all.  As a replacement,
   5902      NCONF_get_number_e() is defined (_e for "error checking") and is
   5903      promoted strongly.  The old NCONF_get_number is kept around for
   5904      binary backward compatibility.
   5905      Make it possible for methods to load from something other than a BIO,
   5906      by providing a function pointer that is given a name instead of a BIO.
   5907      For example, this could be used to load configuration data from an
   5908      LDAP server.
   5909      [Richard Levitte]
   5911   *) Fix for non blocking accept BIOs. Added new I/O special reason
   5912      BIO_RR_ACCEPT to cover this case. Previously use of accept BIOs
   5913      with non blocking I/O was not possible because no retry code was
   5914      implemented. Also added new SSL code SSL_WANT_ACCEPT to cover
   5915      this case.
   5916      [Steve Henson]
   5918   *) Added the beginnings of Rijndael support.
   5919      [Ben Laurie]
   5921   *) Fix for bug in DirectoryString mask setting. Add support for
   5922      X509_NAME_print_ex() in 'req' and X509_print_ex() function
   5923      to allow certificate printing to more controllable, additional
   5924      'certopt' option to 'x509' to allow new printing options to be
   5925      set.
   5926      [Steve Henson]
   5928   *) Clean old EAY MD5 hack from e_os.h.
   5929      [Richard Levitte]
   5931  Changes between 0.9.6l and 0.9.6m  [17 Mar 2004]
   5933   *) Fix null-pointer assignment in do_change_cipher_spec() revealed
   5934      by using the Codenomicon TLS Test Tool (CVE-2004-0079)
   5935      [Joe Orton, Steve Henson]
   5937  Changes between 0.9.6k and 0.9.6l  [04 Nov 2003]
   5939   *) Fix additional bug revealed by the NISCC test suite:
   5941      Stop bug triggering large recursion when presented with
   5942      certain ASN.1 tags (CVE-2003-0851)
   5943      [Steve Henson]
   5945  Changes between 0.9.6j and 0.9.6k  [30 Sep 2003]
   5947   *) Fix various bugs revealed by running the NISCC test suite:
   5949      Stop out of bounds reads in the ASN1 code when presented with
   5950      invalid tags (CVE-2003-0543 and CVE-2003-0544).
   5952      If verify callback ignores invalid public key errors don't try to check
   5953      certificate signature with the NULL public key.
   5955      [Steve Henson]
   5957   *) In ssl3_accept() (ssl/s3_srvr.c) only accept a client certificate
   5958      if the server requested one: as stated in TLS 1.0 and SSL 3.0
   5959      specifications.
   5960      [Steve Henson]
   5962   *) In ssl3_get_client_hello() (ssl/s3_srvr.c), tolerate additional
   5963      extra data after the compression methods not only for TLS 1.0
   5964      but also for SSL 3.0 (as required by the specification).
   5965      [Bodo Moeller; problem pointed out by Matthias Loepfe]
   5967   *) Change X509_certificate_type() to mark the key as exported/exportable
   5968      when it's 512 *bits* long, not 512 bytes.
   5969      [Richard Levitte]
   5971  Changes between 0.9.6i and 0.9.6j  [10 Apr 2003]
   5973   *) Countermeasure against the Klima-Pokorny-Rosa extension of
   5974      Bleichbacher's attack on PKCS #1 v1.5 padding: treat
   5975      a protocol version number mismatch like a decryption error
   5976      in ssl3_get_client_key_exchange (ssl/s3_srvr.c).
   5977      [Bodo Moeller]
   5979   *) Turn on RSA blinding by default in the default implementation
   5980      to avoid a timing attack. Applications that don't want it can call
   5981      RSA_blinding_off() or use the new flag RSA_FLAG_NO_BLINDING.
   5982      They would be ill-advised to do so in most cases.
   5983      [Ben Laurie, Steve Henson, Geoff Thorpe, Bodo Moeller]
   5985   *) Change RSA blinding code so that it works when the PRNG is not
   5986      seeded (in this case, the secret RSA exponent is abused as
   5987      an unpredictable seed -- if it is not unpredictable, there
   5988      is no point in blinding anyway).  Make RSA blinding thread-safe
   5989      by remembering the creator's thread ID in rsa->blinding and
   5990      having all other threads use local one-time blinding factors
   5991      (this requires more computation than sharing rsa->blinding, but
   5992      avoids excessive locking; and if an RSA object is not shared
   5993      between threads, blinding will still be very fast).
   5994      [Bodo Moeller]
   5996  Changes between 0.9.6h and 0.9.6i  [19 Feb 2003]
   5998   *) In ssl3_get_record (ssl/s3_pkt.c), minimize information leaked
   5999      via timing by performing a MAC computation even if incorrrect
   6000      block cipher padding has been found.  This is a countermeasure
   6001      against active attacks where the attacker has to distinguish
   6002      between bad padding and a MAC verification error. (CVE-2003-0078)
   6004      [Bodo Moeller; problem pointed out by Brice Canvel (EPFL),
   6005      Alain Hiltgen (UBS), Serge Vaudenay (EPFL), and
   6006      Martin Vuagnoux (EPFL, Ilion)]
   6008  Changes between 0.9.6g and 0.9.6h  [5 Dec 2002]
   6010   *) New function OPENSSL_cleanse(), which is used to cleanse a section of
   6011      memory from it's contents.  This is done with a counter that will
   6012      place alternating values in each byte.  This can be used to solve
   6013      two issues: 1) the removal of calls to memset() by highly optimizing
   6014      compilers, and 2) cleansing with other values than 0, since those can
   6015      be read through on certain media, for example a swap space on disk.
   6016      [Geoff Thorpe]
   6018   *) Bugfix: client side session caching did not work with external caching,
   6019      because the session->cipher setting was not restored when reloading
   6020      from the external cache. This problem was masked, when
   6021      SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG (part of SSL_OP_ALL) was set.
   6022      (Found by Steve Haslam <steve (a] araqnid.ddts.net>.)
   6023      [Lutz Jaenicke]
   6025   *) Fix client_certificate (ssl/s2_clnt.c): The permissible total
   6026      length of the REQUEST-CERTIFICATE message is 18 .. 34, not 17 .. 33.
   6027      [Zeev Lieber <zeev-l (a] yahoo.com>]
   6029   *) Undo an undocumented change introduced in 0.9.6e which caused
   6030      repeated calls to OpenSSL_add_all_ciphers() and 
   6031      OpenSSL_add_all_digests() to be ignored, even after calling
   6032      EVP_cleanup().
   6033      [Richard Levitte]
   6035   *) Change the default configuration reader to deal with last line not
   6036      being properly terminated.
   6037      [Richard Levitte]
   6039   *) Change X509_NAME_cmp() so it applies the special rules on handling
   6040      DN values that are of type PrintableString, as well as RDNs of type
   6041      emailAddress where the value has the type ia5String.
   6042      [stefank (a] valicert.com via Richard Levitte]
   6044   *) Add a SSL_SESS_CACHE_NO_INTERNAL_STORE flag to take over half
   6045      the job SSL_SESS_CACHE_NO_INTERNAL_LOOKUP was inconsistently
   6046      doing, define a new flag (SSL_SESS_CACHE_NO_INTERNAL) to be
   6047      the bitwise-OR of the two for use by the majority of applications
   6048      wanting this behaviour, and update the docs. The documented
   6049      behaviour and actual behaviour were inconsistent and had been
   6050      changing anyway, so this is more a bug-fix than a behavioural
   6051      change.
   6052      [Geoff Thorpe, diagnosed by Nadav Har'El]
   6054   *) Don't impose a 16-byte length minimum on session IDs in ssl/s3_clnt.c
   6055      (the SSL 3.0 and TLS 1.0 specifications allow any length up to 32 bytes).
   6056      [Bodo Moeller]
   6058   *) Fix initialization code race conditions in
   6059         SSLv23_method(),  SSLv23_client_method(),   SSLv23_server_method(),
   6060         SSLv2_method(),   SSLv2_client_method(),    SSLv2_server_method(),
   6061         SSLv3_method(),   SSLv3_client_method(),    SSLv3_server_method(),
   6062         TLSv1_method(),   TLSv1_client_method(),    TLSv1_server_method(),
   6063         ssl2_get_cipher_by_char(),
   6064         ssl3_get_cipher_by_char().
   6065      [Patrick McCormick <patrick (a] tellme.com>, Bodo Moeller]
   6067   *) Reorder cleanup sequence in SSL_CTX_free(): only remove the ex_data after
   6068      the cached sessions are flushed, as the remove_cb() might use ex_data
   6069      contents. Bug found by Sam Varshavchik <mrsam (a] courier-mta.com>
   6070      (see [openssl.org #212]).
   6071      [Geoff Thorpe, Lutz Jaenicke]
   6073   *) Fix typo in OBJ_txt2obj which incorrectly passed the content
   6074      length, instead of the encoding length to d2i_ASN1_OBJECT.
   6075      [Steve Henson]
   6077  Changes between 0.9.6f and 0.9.6g  [9 Aug 2002]
   6079   *) [In 0.9.6g-engine release:]
   6080      Fix crypto/engine/vendor_defns/cswift.h for WIN32 (use '_stdcall').
   6081      [Lynn Gazis <lgazis (a] rainbow.com>]
   6083  Changes between 0.9.6e and 0.9.6f  [8 Aug 2002]
   6085   *) Fix ASN1 checks. Check for overflow by comparing with LONG_MAX
   6086      and get fix the header length calculation.
   6087      [Florian Weimer <Weimer (a] CERT.Uni-Stuttgart.DE>,
   6088 	Alon Kantor <alonk (a] checkpoint.com> (and others),
   6089 	Steve Henson]
   6091   *) Use proper error handling instead of 'assertions' in buffer
   6092      overflow checks added in 0.9.6e.  This prevents DoS (the
   6093      assertions could call abort()).
   6094      [Arne Ansper <arne (a] ats.cyber.ee>, Bodo Moeller]
   6096  Changes between 0.9.6d and 0.9.6e  [30 Jul 2002]
   6098   *) Add various sanity checks to asn1_get_length() to reject
   6099      the ASN1 length bytes if they exceed sizeof(long), will appear
   6100      negative or the content length exceeds the length of the
   6101      supplied buffer.
   6102      [Steve Henson, Adi Stav <stav (a] mercury.co.il>, James Yonan <jim (a] ntlp.com>]
   6104   *) Fix cipher selection routines: ciphers without encryption had no flags
   6105      for the cipher strength set and where therefore not handled correctly
   6106      by the selection routines (PR #130).
   6107      [Lutz Jaenicke]
   6109   *) Fix EVP_dsa_sha macro.
   6110      [Nils Larsch]
   6112   *) New option
   6114      for disabling the SSL 3.0/TLS 1.0 CBC vulnerability countermeasure
   6115      that was added in OpenSSL 0.9.6d.
   6117      As the countermeasure turned out to be incompatible with some
   6118      broken SSL implementations, the new option is part of SSL_OP_ALL.
   6119      SSL_OP_ALL is usually employed when compatibility with weird SSL
   6120      implementations is desired (e.g. '-bugs' option to 's_client' and
   6121      's_server'), so the new option is automatically set in many
   6122      applications.
   6123      [Bodo Moeller]
   6125   *) Changes in security patch:
   6127      Changes marked "(CHATS)" were sponsored by the Defense Advanced
   6128      Research Projects Agency (DARPA) and Air Force Research Laboratory,
   6129      Air Force Materiel Command, USAF, under agreement number
   6130      F30602-01-2-0537.
   6132   *) Add various sanity checks to asn1_get_length() to reject
   6133      the ASN1 length bytes if they exceed sizeof(long), will appear
   6134      negative or the content length exceeds the length of the
   6135      supplied buffer. (CVE-2002-0659)
   6136      [Steve Henson, Adi Stav <stav (a] mercury.co.il>, James Yonan <jim (a] ntlp.com>]
   6138   *) Assertions for various potential buffer overflows, not known to
   6139      happen in practice.
   6140      [Ben Laurie (CHATS)]
   6142   *) Various temporary buffers to hold ASCII versions of integers were
   6143      too small for 64 bit platforms. (CVE-2002-0655)
   6144      [Matthew Byng-Maddick <mbm (a] aldigital.co.uk> and Ben Laurie (CHATS)>
   6146   *) Remote buffer overflow in SSL3 protocol - an attacker could
   6147      supply an oversized session ID to a client. (CVE-2002-0656)
   6148      [Ben Laurie (CHATS)]
   6150   *) Remote buffer overflow in SSL2 protocol - an attacker could
   6151      supply an oversized client master key. (CVE-2002-0656)
   6152      [Ben Laurie (CHATS)]
   6154  Changes between 0.9.6c and 0.9.6d  [9 May 2002]
   6156   *) Fix crypto/asn1/a_sign.c so that 'parameters' is omitted (not
   6157      encoded as NULL) with id-dsa-with-sha1.
   6158      [Nils Larsch <nla (a] trustcenter.de>; problem pointed out by Bodo Moeller]
   6160   *) Check various X509_...() return values in apps/req.c.
   6161      [Nils Larsch <nla (a] trustcenter.de>]
   6163   *) Fix BASE64 decode (EVP_DecodeUpdate) for data with CR/LF ended lines:
   6164      an end-of-file condition would erronously be flagged, when the CRLF
   6165      was just at the end of a processed block. The bug was discovered when
   6166      processing data through a buffering memory BIO handing the data to a
   6167      BASE64-decoding BIO. Bug fund and patch submitted by Pavel Tsekov
   6168      <ptsekov (a] syntrex.com> and Nedelcho Stanev.
   6169      [Lutz Jaenicke]
   6171   *) Implement a countermeasure against a vulnerability recently found
   6172      in CBC ciphersuites in SSL 3.0/TLS 1.0: Send an empty fragment
   6173      before application data chunks to avoid the use of known IVs
   6174      with data potentially chosen by the attacker.
   6175      [Bodo Moeller]
   6177   *) Fix length checks in ssl3_get_client_hello().
   6178      [Bodo Moeller]
   6180   *) TLS/SSL library bugfix: use s->s3->in_read_app_data differently
   6181      to prevent ssl3_read_internal() from incorrectly assuming that
   6182      ssl3_read_bytes() found application data while handshake
   6183      processing was enabled when in fact s->s3->in_read_app_data was
   6184      merely automatically cleared during the initial handshake.
   6185      [Bodo Moeller; problem pointed out by Arne Ansper <arne (a] ats.cyber.ee>]
   6187   *) Fix object definitions for Private and Enterprise: they were not
   6188      recognized in their shortname (=lowercase) representation. Extend
   6189      obj_dat.pl to issue an error when using undefined keywords instead
   6190      of silently ignoring the problem (Svenning Sorensen
   6191      <sss (a] sss.dnsalias.net>).
   6192      [Lutz Jaenicke]
   6194   *) Fix DH_generate_parameters() so that it works for 'non-standard'
   6195      generators, i.e. generators other than 2 and 5.  (Previously, the
   6196      code did not properly initialise the 'add' and 'rem' values to
   6197      BN_generate_prime().)
   6199      In the new general case, we do not insist that 'generator' is
   6200      actually a primitive root: This requirement is rather pointless;
   6201      a generator of the order-q subgroup is just as good, if not
   6202      better.
   6203      [Bodo Moeller]
   6205   *) Map new X509 verification errors to alerts. Discovered and submitted by
   6206      Tom Wu <tom (a] arcot.com>.
   6207      [Lutz Jaenicke]
   6209   *) Fix ssl3_pending() (ssl/s3_lib.c) to prevent SSL_pending() from
   6210      returning non-zero before the data has been completely received
   6211      when using non-blocking I/O.
   6212      [Bodo Moeller; problem pointed out by John Hughes]
   6214   *) Some of the ciphers missed the strength entry (SSL_LOW etc).
   6215      [Ben Laurie, Lutz Jaenicke]
   6217   *) Fix bug in SSL_clear(): bad sessions were not removed (found by
   6218      Yoram Zahavi <YoramZ (a] gilian.com>).
   6219      [Lutz Jaenicke]
   6221   *) Add information about CygWin 1.3 and on, and preserve proper
   6222      configuration for the versions before that.
   6223      [Corinna Vinschen <vinschen (a] redhat.com> and Richard Levitte]
   6225   *) Make removal from session cache (SSL_CTX_remove_session()) more robust:
   6226      check whether we deal with a copy of a session and do not delete from
   6227      the cache in this case. Problem reported by "Izhar Shoshani Levi"
   6228      <izhar (a] checkpoint.com>.
   6229      [Lutz Jaenicke]
   6231   *) Do not store session data into the internal session cache, if it
   6232      is never intended to be looked up (SSL_SESS_CACHE_NO_INTERNAL_LOOKUP
   6233      flag is set). Proposed by Aslam <aslam (a] funk.com>.
   6234      [Lutz Jaenicke]
   6236   *) Have ASN1_BIT_STRING_set_bit() really clear a bit when the requested
   6237      value is 0.
   6238      [Richard Levitte]
   6240   *) [In 0.9.6d-engine release:]
   6241      Fix a crashbug and a logic bug in hwcrhk_load_pubkey().
   6242      [Toomas Kiisk <vix (a] cyber.ee> via Richard Levitte]
   6244   *) Add the configuration target linux-s390x.
   6245      [Neale Ferguson <Neale.Ferguson (a] SoftwareAG-USA.com> via Richard Levitte]
   6247   *) The earlier bugfix for the SSL3_ST_SW_HELLO_REQ_C case of
   6248      ssl3_accept (ssl/s3_srvr.c) incorrectly used a local flag
   6249      variable as an indication that a ClientHello message has been
   6250      received.  As the flag value will be lost between multiple
   6251      invocations of ssl3_accept when using non-blocking I/O, the
   6252      function may not be aware that a handshake has actually taken
   6253      place, thus preventing a new session from being added to the
   6254      session cache.
   6256      To avoid this problem, we now set s->new_session to 2 instead of
   6257      using a local variable.
   6258      [Lutz Jaenicke, Bodo Moeller]
   6260   *) Bugfix: Return -1 from ssl3_get_server_done (ssl3/s3_clnt.c)
   6261      if the SSL_R_LENGTH_MISMATCH error is detected.
   6262      [Geoff Thorpe, Bodo Moeller]
   6264   *) New 'shared_ldflag' column in Configure platform table.
   6265      [Richard Levitte]
   6267   *) Fix EVP_CIPHER_mode macro.
   6268      ["Dan S. Camper" <dan (a] bti.net>]
   6270   *) Fix ssl3_read_bytes (ssl/s3_pkt.c): To ignore messages of unknown
   6271      type, we must throw them away by setting rr->length to 0.
   6272      [D P Chang <dpc (a] qualys.com>]
   6274  Changes between 0.9.6b and 0.9.6c  [21 dec 2001]
   6276   *) Fix BN_rand_range bug pointed out by Dominikus Scherkl
   6277      <Dominikus.Scherkl (a] biodata.com>.  (The previous implementation
   6278      worked incorrectly for those cases where  range = 10..._2  and
   6279      3*range  is two bits longer than  range.)
   6280      [Bodo Moeller]
   6282   *) Only add signing time to PKCS7 structures if it is not already
   6283      present.
   6284      [Steve Henson]
   6286   *) Fix crypto/objects/objects.h: "ld-ce" should be "id-ce",
   6287      OBJ_ld_ce should be OBJ_id_ce.
   6288      Also some ip-pda OIDs in crypto/objects/objects.txt were
   6289      incorrect (cf. RFC 3039).
   6290      [Matt Cooper, Frederic Giudicelli, Bodo Moeller]
   6292   *) Release CRYPTO_LOCK_DYNLOCK when CRYPTO_destroy_dynlockid()
   6293      returns early because it has nothing to do.
   6294      [Andy Schneider <andy.schneider (a] bjss.co.uk>]
   6296   *) [In 0.9.6c-engine release:]
   6297      Fix mutex callback return values in crypto/engine/hw_ncipher.c.
   6298      [Andy Schneider <andy.schneider (a] bjss.co.uk>]
   6300   *) [In 0.9.6c-engine release:]
   6301      Add support for Cryptographic Appliance's keyserver technology.
   6302      (Use engine 'keyclient')
   6303      [Cryptographic Appliances and Geoff Thorpe]
   6305   *) Add a configuration entry for OS/390 Unix.  The C compiler 'c89'
   6306      is called via tools/c89.sh because arguments have to be
   6307      rearranged (all '-L' options must appear before the first object
   6308      modules).
   6309      [Richard Shapiro <rshapiro (a] abinitio.com>]
   6311   *) [In 0.9.6c-engine release:]
   6312      Add support for Broadcom crypto accelerator cards, backported
   6313      from 0.9.7.
   6314      [Broadcom, Nalin Dahyabhai <nalin (a] redhat.com>, Mark Cox]
   6316   *) [In 0.9.6c-engine release:]
   6317      Add support for SureWare crypto accelerator cards from 
   6318      Baltimore Technologies.  (Use engine 'sureware')
   6319      [Baltimore Technologies and Mark Cox]
   6321   *) [In 0.9.6c-engine release:]
   6322      Add support for crypto accelerator cards from Accelerated
   6323      Encryption Processing, www.aep.ie.  (Use engine 'aep')
   6324      [AEP Inc. and Mark Cox]
   6326   *) Add a configuration entry for gcc on UnixWare.
   6327      [Gary Benson <gbenson (a] redhat.com>]
   6329   *) Change ssl/s2_clnt.c and ssl/s2_srvr.c so that received handshake
   6330      messages are stored in a single piece (fixed-length part and
   6331      variable-length part combined) and fix various bugs found on the way.
   6332      [Bodo Moeller]
   6334   *) Disable caching in BIO_gethostbyname(), directly use gethostbyname()
   6335      instead.  BIO_gethostbyname() does not know what timeouts are
   6336      appropriate, so entries would stay in cache even when they have
   6337      become invalid.
   6338      [Bodo Moeller; problem pointed out by Rich Salz <rsalz (a] zolera.com>
   6340   *) Change ssl23_get_client_hello (ssl/s23_srvr.c) behaviour when
   6341      faced with a pathologically small ClientHello fragment that does
   6342      not contain client_version: Instead of aborting with an error,
   6343      simply choose the highest available protocol version (i.e.,
   6344      TLS 1.0 unless it is disabled).  In practice, ClientHello
   6345      messages are never sent like this, but this change gives us
   6346      strictly correct behaviour at least for TLS.
   6347      [Bodo Moeller]
   6349   *) Fix SSL handshake functions and SSL_clear() such that SSL_clear()
   6350      never resets s->method to s->ctx->method when called from within
   6351      one of the SSL handshake functions.
   6352      [Bodo Moeller; problem pointed out by Niko Baric]
   6354   *) In ssl3_get_client_hello (ssl/s3_srvr.c), generate a fatal alert
   6355      (sent using the client's version number) if client_version is
   6356      smaller than the protocol version in use.  Also change
   6357      ssl23_get_client_hello (ssl/s23_srvr.c) to select TLS 1.0 if
   6358      the client demanded SSL 3.0 but only TLS 1.0 is enabled; then
   6359      the client will at least see that alert.
   6360      [Bodo Moeller]
   6362   *) Fix ssl3_get_message (ssl/s3_both.c) to handle message fragmentation
   6363      correctly.
   6364      [Bodo Moeller]
   6366   *) Avoid infinite loop in ssl3_get_message (ssl/s3_both.c) if a
   6367      client receives HelloRequest while in a handshake.
   6368      [Bodo Moeller; bug noticed by Andy Schneider <andy.schneider (a] bjss.co.uk>]
   6370   *) Bugfix in ssl3_accept (ssl/s3_srvr.c): Case SSL3_ST_SW_HELLO_REQ_C
   6371      should end in 'break', not 'goto end' which circuments various
   6372      cleanups done in state SSL_ST_OK.   But session related stuff
   6373      must be disabled for SSL_ST_OK in the case that we just sent a
   6374      HelloRequest.
   6376      Also avoid some overhead by not calling ssl_init_wbio_buffer()
   6377      before just sending a HelloRequest.
   6378      [Bodo Moeller, Eric Rescorla <ekr (a] rtfm.com>]
   6380   *) Fix ssl/s3_enc.c, ssl/t1_enc.c and ssl/s3_pkt.c so that we don't
   6381      reveal whether illegal block cipher padding was found or a MAC
   6382      verification error occured.  (Neither SSLerr() codes nor alerts
   6383      are directly visible to potential attackers, but the information
   6384      may leak via logfiles.)
   6386      Similar changes are not required for the SSL 2.0 implementation
   6387      because the number of padding bytes is sent in clear for SSL 2.0,
   6388      and the extra bytes are just ignored.  However ssl/s2_pkt.c
   6389      failed to verify that the purported number of padding bytes is in
   6390      the legal range.
   6391      [Bodo Moeller]
   6393   *) Add OpenUNIX-8 support including shared libraries
   6394      (Boyd Lynn Gerber <gerberb (a] zenez.com>).
   6395      [Lutz Jaenicke]
   6397   *) Improve RSA_padding_check_PKCS1_OAEP() check again to avoid
   6398      'wristwatch attack' using huge encoding parameters (cf.
   6399      James H. Manger's CRYPTO 2001 paper).  Note that the
   6400      RSA_PKCS1_OAEP_PADDING case of RSA_private_decrypt() does not use
   6401      encoding parameters and hence was not vulnerable.
   6402      [Bodo Moeller]
   6404   *) BN_sqr() bug fix.
   6405      [Ulf Mller, reported by Jim Ellis <jim.ellis (a] cavium.com>]
   6407   *) Rabin-Miller test analyses assume uniformly distributed witnesses,
   6408      so use BN_pseudo_rand_range() instead of using BN_pseudo_rand()
   6409      followed by modular reduction.
   6410      [Bodo Moeller; pointed out by Adam Young <AYoung1 (a] NCSUS.JNJ.COM>]
   6412   *) Add BN_pseudo_rand_range() with obvious functionality: BN_rand_range()
   6413      equivalent based on BN_pseudo_rand() instead of BN_rand().
   6414      [Bodo Moeller]
   6416   *) s3_srvr.c: allow sending of large client certificate lists (> 16 kB).
   6417      This function was broken, as the check for a new client hello message
   6418      to handle SGC did not allow these large messages.
   6419      (Tracked down by "Douglas E. Engert" <deengert (a] anl.gov>.)
   6420      [Lutz Jaenicke]
   6422   *) Add alert descriptions for TLSv1 to SSL_alert_desc_string[_long]().
   6423      [Lutz Jaenicke]
   6425   *) Fix buggy behaviour of BIO_get_num_renegotiates() and BIO_ctrl()
   6426      for BIO_C_GET_WRITE_BUF_SIZE ("Stephen Hinton" <shinton (a] netopia.com>).
   6427      [Lutz Jaenicke]
   6429   *) Rework the configuration and shared library support for Tru64 Unix.
   6430      The configuration part makes use of modern compiler features and
   6431      still retains old compiler behavior for those that run older versions
   6432      of the OS.  The shared library support part includes a variant that
   6433      uses the RPATH feature, and is available through the special
   6434      configuration target "alpha-cc-rpath", which will never be selected
   6435      automatically.
   6436      [Tim Mooney <mooney (a] dogbert.cc.ndsu.NoDak.edu> via Richard Levitte]
   6438   *) In ssl3_get_key_exchange (ssl/s3_clnt.c), call ssl3_get_message()
   6439      with the same message size as in ssl3_get_certificate_request().
   6440      Otherwise, if no ServerKeyExchange message occurs, CertificateRequest
   6441      messages might inadvertently be reject as too long.
   6442      [Petr Lampa <lampa (a] fee.vutbr.cz>]
   6444   *) Enhanced support for IA-64 Unix platforms (well, Linux and HP-UX).
   6445      [Andy Polyakov]
   6447   *) Modified SSL library such that the verify_callback that has been set
   6448      specificly for an SSL object with SSL_set_verify() is actually being
   6449      used. Before the change, a verify_callback set with this function was
   6450      ignored and the verify_callback() set in the SSL_CTX at the time of
   6451      the call was used. New function X509_STORE_CTX_set_verify_cb() introduced
   6452      to allow the necessary settings.
   6453      [Lutz Jaenicke]
   6455   *) Initialize static variable in crypto/dsa/dsa_lib.c and crypto/dh/dh_lib.c
   6456      explicitly to NULL, as at least on Solaris 8 this seems not always to be
   6457      done automatically (in contradiction to the requirements of the C
   6458      standard). This made problems when used from OpenSSH.
   6459      [Lutz Jaenicke]
   6461   *) In OpenSSL 0.9.6a and 0.9.6b, crypto/dh/dh_key.c ignored
   6462      dh->length and always used
   6464           BN_rand_range(priv_key, dh->p).
   6466      BN_rand_range() is not necessary for Diffie-Hellman, and this
   6467      specific range makes Diffie-Hellman unnecessarily inefficient if
   6468      dh->length (recommended exponent length) is much smaller than the
   6469      length of dh->p.  We could use BN_rand_range() if the order of
   6470      the subgroup was stored in the DH structure, but we only have
   6471      dh->length.
   6473      So switch back to
   6475           BN_rand(priv_key, l, ...)
   6477      where 'l' is dh->length if this is defined, or BN_num_bits(dh->p)-1
   6478      otherwise.
   6479      [Bodo Moeller]
   6481   *) In
   6483           RSA_eay_public_encrypt
   6484           RSA_eay_private_decrypt
   6485           RSA_eay_private_encrypt (signing)
   6486           RSA_eay_public_decrypt (signature verification)
   6488      (default implementations for RSA_public_encrypt,
   6489      RSA_private_decrypt, RSA_private_encrypt, RSA_public_decrypt),
   6490      always reject numbers >= n.
   6491      [Bodo Moeller]
   6493   *) In crypto/rand/md_rand.c, use a new short-time lock CRYPTO_LOCK_RAND2
   6494      to synchronize access to 'locking_thread'.  This is necessary on
   6495      systems where access to 'locking_thread' (an 'unsigned long'
   6496      variable) is not atomic.
   6497      [Bodo Moeller]
   6499   *) In crypto/rand/md_rand.c, set 'locking_thread' to current thread's ID
   6500      *before* setting the 'crypto_lock_rand' flag.  The previous code had
   6501      a race condition if 0 is a valid thread ID.
   6502      [Travis Vitek <vitek (a] roguewave.com>]
   6504   *) Add support for shared libraries under Irix.
   6505      [Albert Chin-A-Young <china (a] thewrittenword.com>]
   6507   *) Add configuration option to build on Linux on both big-endian and
   6508      little-endian MIPS.
   6509      [Ralf Baechle <ralf (a] uni-koblenz.de>]
   6511   *) Add the possibility to create shared libraries on HP-UX.
   6512      [Richard Levitte]
   6514  Changes between 0.9.6a and 0.9.6b  [9 Jul 2001]
   6516   *) Change ssleay_rand_bytes (crypto/rand/md_rand.c)
   6517      to avoid a SSLeay/OpenSSL PRNG weakness pointed out by
   6518      Markku-Juhani O. Saarinen <markku-juhani.saarinen (a] nokia.com>:
   6519      PRNG state recovery was possible based on the output of
   6520      one PRNG request appropriately sized to gain knowledge on
   6521      'md' followed by enough consecutive 1-byte PRNG requests
   6522      to traverse all of 'state'.
   6524      1. When updating 'md_local' (the current thread's copy of 'md')
   6525         during PRNG output generation, hash all of the previous
   6526         'md_local' value, not just the half used for PRNG output.
   6528      2. Make the number of bytes from 'state' included into the hash
   6529         independent from the number of PRNG bytes requested.
   6531      The first measure alone would be sufficient to avoid
   6532      Markku-Juhani's attack.  (Actually it had never occurred
   6533      to me that the half of 'md_local' used for chaining was the
   6534      half from which PRNG output bytes were taken -- I had always
   6535      assumed that the secret half would be used.)  The second
   6536      measure makes sure that additional data from 'state' is never
   6537      mixed into 'md_local' in small portions; this heuristically
   6538      further strengthens the PRNG.
   6539      [Bodo Moeller]
   6541   *) Fix crypto/bn/asm/mips3.s.
   6542      [Andy Polyakov]
   6544   *) When only the key is given to "enc", the IV is undefined. Print out
   6545      an error message in this case.
   6546      [Lutz Jaenicke]
   6548   *) Handle special case when X509_NAME is empty in X509 printing routines.
   6549      [Steve Henson]
   6551   *) In dsa_do_verify (crypto/dsa/dsa_ossl.c), verify that r and s are
   6552      positive and less than q.
   6553      [Bodo Moeller]
   6555   *) Don't change *pointer in CRYPTO_add_lock() is add_lock_callback is
   6556      used: it isn't thread safe and the add_lock_callback should handle
   6557      that itself.
   6558      [Paul Rose <Paul.Rose (a] bridge.com>]
   6560   *) Verify that incoming data obeys the block size in
   6561      ssl3_enc (ssl/s3_enc.c) and tls1_enc (ssl/t1_enc.c).
   6562      [Bodo Moeller]
   6564   *) Fix OAEP check.
   6565      [Ulf Mller, Bodo Mller]
   6567   *) The countermeasure against Bleichbacher's attack on PKCS #1 v1.5
   6568      RSA encryption was accidentally removed in s3_srvr.c in OpenSSL 0.9.5
   6569      when fixing the server behaviour for backwards-compatible 'client
   6570      hello' messages.  (Note that the attack is impractical against
   6571      SSL 3.0 and TLS 1.0 anyway because length and version checking
   6572      means that the probability of guessing a valid ciphertext is
   6573      around 2^-40; see section 5 in Bleichenbacher's CRYPTO '98
   6574      paper.)
   6576      Before 0.9.5, the countermeasure (hide the error by generating a
   6577      random 'decryption result') did not work properly because
   6578      ERR_clear_error() was missing, meaning that SSL_get_error() would
   6579      detect the supposedly ignored error.
   6581      Both problems are now fixed.
   6582      [Bodo Moeller]
   6584   *) In crypto/bio/bf_buff.c, increase DEFAULT_BUFFER_SIZE to 4096
   6585      (previously it was 1024).
   6586      [Bodo Moeller]
   6588   *) Fix for compatibility mode trust settings: ignore trust settings
   6589      unless some valid trust or reject settings are present.
   6590      [Steve Henson]
   6592   *) Fix for blowfish EVP: its a variable length cipher.
   6593      [Steve Henson]
   6595   *) Fix various bugs related to DSA S/MIME verification. Handle missing
   6596      parameters in DSA public key structures and return an error in the
   6597      DSA routines if parameters are absent.
   6598      [Steve Henson]
   6600   *) In versions up to 0.9.6, RAND_file_name() resorted to file ".rnd"
   6601      in the current directory if neither $RANDFILE nor $HOME was set.
   6602      RAND_file_name() in 0.9.6a returned NULL in this case.  This has
   6603      caused some confusion to Windows users who haven't defined $HOME.
   6604      Thus RAND_file_name() is changed again: e_os.h can define a
   6605      DEFAULT_HOME, which will be used if $HOME is not set.
   6606      For Windows, we use "C:"; on other platforms, we still require
   6607      environment variables.
   6609   *) Move 'if (!initialized) RAND_poll()' into regions protected by
   6610      CRYPTO_LOCK_RAND.  This is not strictly necessary, but avoids
   6611      having multiple threads call RAND_poll() concurrently.
   6612      [Bodo Moeller]
   6614   *) In crypto/rand/md_rand.c, replace 'add_do_not_lock' flag by a
   6615      combination of a flag and a thread ID variable.
   6616      Otherwise while one thread is in ssleay_rand_bytes (which sets the
   6617      flag), *other* threads can enter ssleay_add_bytes without obeying
   6618      the CRYPTO_LOCK_RAND lock (and may even illegally release the lock
   6619      that they do not hold after the first thread unsets add_do_not_lock).
   6620      [Bodo Moeller]
   6622   *) Change bctest again: '-x' expressions are not available in all
   6623      versions of 'test'.
   6624      [Bodo Moeller]
   6626  Changes between 0.9.6 and 0.9.6a  [5 Apr 2001]
   6628   *) Fix a couple of memory leaks in PKCS7_dataDecode()
   6629      [Steve Henson, reported by Heyun Zheng <hzheng (a] atdsprint.com>]
   6631   *) Change Configure and Makefiles to provide EXE_EXT, which will contain
   6632      the default extension for executables, if any.  Also, make the perl
   6633      scripts that use symlink() to test if it really exists and use "cp"
   6634      if it doesn't.  All this made OpenSSL compilable and installable in
   6635      CygWin.
   6636      [Richard Levitte]
   6638   *) Fix for asn1_GetSequence() for indefinite length constructed data.
   6639      If SEQUENCE is length is indefinite just set c->slen to the total
   6640      amount of data available.
   6641      [Steve Henson, reported by shige (a] FreeBSD.org]
   6642      [This change does not apply to 0.9.7.]
   6644   *) Change bctest to avoid here-documents inside command substitution
   6645      (workaround for FreeBSD /bin/sh bug).
   6646      For compatibility with Ultrix, avoid shell functions (introduced
   6647      in the bctest version that searches along $PATH).
   6648      [Bodo Moeller]
   6650   *) Rename 'des_encrypt' to 'des_encrypt1'.  This avoids the clashes
   6651      with des_encrypt() defined on some operating systems, like Solaris
   6652      and UnixWare.
   6653      [Richard Levitte]
   6655   *) Check the result of RSA-CRT (see D. Boneh, R. DeMillo, R. Lipton:
   6656      On the Importance of Eliminating Errors in Cryptographic
   6657      Computations, J. Cryptology 14 (2001) 2, 101-119,
   6658      http://theory.stanford.edu/~dabo/papers/faults.ps.gz).
   6659      [Ulf Moeller]
   6661   *) MIPS assembler BIGNUM division bug fix. 
   6662      [Andy Polyakov]
   6664   *) Disabled incorrect Alpha assembler code.
   6665      [Richard Levitte]
   6667   *) Fix PKCS#7 decode routines so they correctly update the length
   6668      after reading an EOC for the EXPLICIT tag.
   6669      [Steve Henson]
   6670      [This change does not apply to 0.9.7.]
   6672   *) Fix bug in PKCS#12 key generation routines. This was triggered
   6673      if a 3DES key was generated with a 0 initial byte. Include
   6674      PKCS12_BROKEN_KEYGEN compilation option to retain the old
   6675      (but broken) behaviour.
   6676      [Steve Henson]
   6678   *) Enhance bctest to search for a working bc along $PATH and print
   6679      it when found.
   6680      [Tim Rice <tim (a] multitalents.net> via Richard Levitte]
   6682   *) Fix memory leaks in err.c: free err_data string if necessary;
   6683      don't write to the wrong index in ERR_set_error_data.
   6684      [Bodo Moeller]
   6686   *) Implement ssl23_peek (analogous to ssl23_read), which previously
   6687      did not exist.
   6688      [Bodo Moeller]
   6690   *) Replace rdtsc with _emit statements for VC++ version 5.
   6691      [Jeremy Cooper <jeremy (a] baymoo.org>]
   6693   *) Make it possible to reuse SSLv2 sessions.
   6694      [Richard Levitte]
   6696   *) In copy_email() check for >= 0 as a return value for
   6697      X509_NAME_get_index_by_NID() since 0 is a valid index.
   6698      [Steve Henson reported by Massimiliano Pala <madwolf (a] opensca.org>]
   6700   *) Avoid coredump with unsupported or invalid public keys by checking if
   6701      X509_get_pubkey() fails in PKCS7_verify(). Fix memory leak when
   6702      PKCS7_verify() fails with non detached data.
   6703      [Steve Henson]
   6705   *) Don't use getenv in library functions when run as setuid/setgid.
   6706      New function OPENSSL_issetugid().
   6707      [Ulf Moeller]
   6709   *) Avoid false positives in memory leak detection code (crypto/mem_dbg.c)
   6710      due to incorrect handling of multi-threading:
   6712      1. Fix timing glitch in the MemCheck_off() portion of CRYPTO_mem_ctrl().
   6714      2. Fix logical glitch in is_MemCheck_on() aka CRYPTO_is_mem_check_on().
   6716      3. Count how many times MemCheck_off() has been called so that
   6717         nested use can be treated correctly.  This also avoids 
   6718         inband-signalling in the previous code (which relied on the
   6719         assumption that thread ID 0 is impossible).
   6720      [Bodo Moeller]
   6722   *) Add "-rand" option also to s_client and s_server.
   6723      [Lutz Jaenicke]
   6725   *) Fix CPU detection on Irix 6.x.
   6726      [Kurt Hockenbury <khockenb (a] stevens-tech.edu> and
   6727       "Bruce W. Forsberg" <bruce.forsberg (a] baesystems.com>]
   6729   *) Fix X509_NAME bug which produced incorrect encoding if X509_NAME
   6730      was empty.
   6731      [Steve Henson]
   6732      [This change does not apply to 0.9.7.]
   6734   *) Use the cached encoding of an X509_NAME structure rather than
   6735      copying it. This is apparently the reason for the libsafe "errors"
   6736      but the code is actually correct.
   6737      [Steve Henson]
   6739   *) Add new function BN_rand_range(), and fix DSA_sign_setup() to prevent
   6740      Bleichenbacher's DSA attack.
   6741      Extend BN_[pseudo_]rand: As before, top=1 forces the highest two bits
   6742      to be set and top=0 forces the highest bit to be set; top=-1 is new
   6743      and leaves the highest bit random.
   6744      [Ulf Moeller, Bodo Moeller]
   6746   *) In the NCONF_...-based implementations for CONF_... queries
   6747      (crypto/conf/conf_lib.c), if the input LHASH is NULL, avoid using
   6748      a temporary CONF structure with the data component set to NULL
   6749      (which gives segmentation faults in lh_retrieve).
   6750      Instead, use NULL for the CONF pointer in CONF_get_string and
   6751      CONF_get_number (which may use environment variables) and directly
   6752      return NULL from CONF_get_section.
   6753      [Bodo Moeller]
   6755   *) Fix potential buffer overrun for EBCDIC.
   6756      [Ulf Moeller]
   6758   *) Tolerate nonRepudiation as being valid for S/MIME signing and certSign
   6759      keyUsage if basicConstraints absent for a CA.
   6760      [Steve Henson]
   6762   *) Make SMIME_write_PKCS7() write mail header values with a format that
   6763      is more generally accepted (no spaces before the semicolon), since
   6764      some programs can't parse those values properly otherwise.  Also make
   6765      sure BIO's that break lines after each write do not create invalid
   6766      headers.
   6767      [Richard Levitte]
   6769   *) Make the CRL encoding routines work with empty SEQUENCE OF. The
   6770      macros previously used would not encode an empty SEQUENCE OF
   6771      and break the signature.
   6772      [Steve Henson]
   6773      [This change does not apply to 0.9.7.]
   6775   *) Zero the premaster secret after deriving the master secret in
   6776      DH ciphersuites.
   6777      [Steve Henson]
   6779   *) Add some EVP_add_digest_alias registrations (as found in
   6780      OpenSSL_add_all_digests()) to SSL_library_init()
   6781      aka OpenSSL_add_ssl_algorithms().  This provides improved
   6782      compatibility with peers using X.509 certificates
   6783      with unconventional AlgorithmIdentifier OIDs.
   6784      [Bodo Moeller]
   6786   *) Fix for Irix with NO_ASM.
   6787      ["Bruce W. Forsberg" <bruce.forsberg (a] baesystems.com>]
   6789   *) ./config script fixes.
   6790      [Ulf Moeller, Richard Levitte]
   6792   *) Fix 'openssl passwd -1'.
   6793      [Bodo Moeller]
   6795   *) Change PKCS12_key_gen_asc() so it can cope with non null
   6796      terminated strings whose length is passed in the passlen
   6797      parameter, for example from PEM callbacks. This was done
   6798      by adding an extra length parameter to asc2uni().
   6799      [Steve Henson, reported by <oddissey (a] samsung.co.kr>]
   6801   *) Fix C code generated by 'openssl dsaparam -C': If a BN_bin2bn
   6802      call failed, free the DSA structure.
   6803      [Bodo Moeller]
   6805   *) Fix to uni2asc() to cope with zero length Unicode strings.
   6806      These are present in some PKCS#12 files.
   6807      [Steve Henson]
   6809   *) Increase s2->wbuf allocation by one byte in ssl2_new (ssl/s2_lib.c).
   6810      Otherwise do_ssl_write (ssl/s2_pkt.c) will write beyond buffer limits
   6811      when writing a 32767 byte record.
   6812      [Bodo Moeller; problem reported by Eric Day <eday (a] concentric.net>]
   6814   *) In RSA_eay_public_{en,ed}crypt and RSA_eay_mod_exp (rsa_eay.c),
   6815      obtain lock CRYPTO_LOCK_RSA before setting rsa->_method_mod_{n,p,q}.
   6817      (RSA objects have a reference count access to which is protected
   6818      by CRYPTO_LOCK_RSA [see rsa_lib.c, s3_srvr.c, ssl_cert.c, ssl_rsa.c],
   6819      so they are meant to be shared between threads.)
   6820      [Bodo Moeller, Geoff Thorpe; original patch submitted by
   6821      "Reddie, Steven" <Steven.Reddie (a] ca.com>]
   6823   *) Fix a deadlock in CRYPTO_mem_leaks().
   6824      [Bodo Moeller]
   6826   *) Use better test patterns in bntest.
   6827      [Ulf Mller]
   6829   *) rand_win.c fix for Borland C.
   6830      [Ulf Mller]
   6832   *) BN_rshift bugfix for n == 0.
   6833      [Bodo Moeller]
   6835   *) Add a 'bctest' script that checks for some known 'bc' bugs
   6836      so that 'make test' does not abort just because 'bc' is broken.
   6837      [Bodo Moeller]
   6839   *) Store verify_result within SSL_SESSION also for client side to
   6840      avoid potential security hole. (Re-used sessions on the client side
   6841      always resulted in verify_result==X509_V_OK, not using the original
   6842      result of the server certificate verification.)
   6843      [Lutz Jaenicke]
   6845   *) Fix ssl3_pending: If the record in s->s3->rrec is not of type
   6846      SSL3_RT_APPLICATION_DATA, return 0.
   6847      Similarly, change ssl2_pending to return 0 if SSL_in_init(s) is true.
   6848      [Bodo Moeller]
   6850   *) Fix SSL_peek:
   6851      Both ssl2_peek and ssl3_peek, which were totally broken in earlier
   6852      releases, have been re-implemented by renaming the previous
   6853      implementations of ssl2_read and ssl3_read to ssl2_read_internal
   6854      and ssl3_read_internal, respectively, and adding 'peek' parameters
   6855      to them.  The new ssl[23]_{read,peek} functions are calls to
   6856      ssl[23]_read_internal with the 'peek' flag set appropriately.
   6857      A 'peek' parameter has also been added to ssl3_read_bytes, which
   6858      does the actual work for ssl3_read_internal.
   6859      [Bodo Moeller]
   6861   *) Initialise "ex_data" member of RSA/DSA/DH structures prior to calling
   6862      the method-specific "init()" handler. Also clean up ex_data after
   6863      calling the method-specific "finish()" handler. Previously, this was
   6864      happening the other way round.
   6865      [Geoff Thorpe]
   6867   *) Increase BN_CTX_NUM (the number of BIGNUMs in a BN_CTX) to 16.
   6868      The previous value, 12, was not always sufficient for BN_mod_exp().
   6869      [Bodo Moeller]
   6871   *) Make sure that shared libraries get the internal name engine with
   6872      the full version number and not just 0.  This should mark the
   6873      shared libraries as not backward compatible.  Of course, this should
   6874      be changed again when we can guarantee backward binary compatibility.
   6875      [Richard Levitte]
   6877   *) Fix typo in get_cert_by_subject() in by_dir.c
   6878      [Jean-Marc Desperrier <jean-marc.desperrier (a] certplus.com>]
   6880   *) Rework the system to generate shared libraries:
   6882      - Make note of the expected extension for the shared libraries and
   6883        if there is a need for symbolic links from for example libcrypto.so.0
   6884        to libcrypto.so.0.9.7.  There is extended info in Configure for
   6885        that.
   6887      - Make as few rebuilds of the shared libraries as possible.
   6889      - Still avoid linking the OpenSSL programs with the shared libraries.
   6891      - When installing, install the shared libraries separately from the
   6892        static ones.
   6893      [Richard Levitte]
   6895   *) Fix SSL_CTX_set_read_ahead macro to actually use its argument.
   6897      Copy SSL_CTX's read_ahead flag to SSL object directly in SSL_new
   6898      and not in SSL_clear because the latter is also used by the
   6899      accept/connect functions; previously, the settings made by
   6900      SSL_set_read_ahead would be lost during the handshake.
   6901      [Bodo Moeller; problems reported by Anders Gertz <gertz (a] epact.se>]     
   6903   *) Correct util/mkdef.pl to be selective about disabled algorithms.
   6904      Previously, it would create entries for disableed algorithms no
   6905      matter what.
   6906      [Richard Levitte]
   6908   *) Added several new manual pages for SSL_* function.
   6909      [Lutz Jaenicke]
   6911  Changes between 0.9.5a and 0.9.6  [24 Sep 2000]
   6913   *) In ssl23_get_client_hello, generate an error message when faced
   6914      with an initial SSL 3.0/TLS record that is too small to contain the
   6915      first two bytes of the ClientHello message, i.e. client_version.
   6916      (Note that this is a pathologic case that probably has never happened
   6917      in real life.)  The previous approach was to use the version number
   6918      from the record header as a substitute; but our protocol choice
   6919      should not depend on that one because it is not authenticated
   6920      by the Finished messages.
   6921      [Bodo Moeller]
   6923   *) More robust randomness gathering functions for Windows.
   6924      [Jeffrey Altman <jaltman (a] columbia.edu>]
   6926   *) For compatibility reasons if the flag X509_V_FLAG_ISSUER_CHECK is
   6927      not set then we don't setup the error code for issuer check errors
   6928      to avoid possibly overwriting other errors which the callback does
   6929      handle. If an application does set the flag then we assume it knows
   6930      what it is doing and can handle the new informational codes
   6931      appropriately.
   6932      [Steve Henson]
   6934   *) Fix for a nasty bug in ASN1_TYPE handling. ASN1_TYPE is used for
   6935      a general "ANY" type, as such it should be able to decode anything
   6936      including tagged types. However it didn't check the class so it would
   6937      wrongly interpret tagged types in the same way as their universal
   6938      counterpart and unknown types were just rejected. Changed so that the
   6939      tagged and unknown types are handled in the same way as a SEQUENCE:
   6940      that is the encoding is stored intact. There is also a new type
   6941      "V_ASN1_OTHER" which is used when the class is not universal, in this
   6942      case we have no idea what the actual type is so we just lump them all
   6943      together.
   6944      [Steve Henson]
   6946   *) On VMS, stdout may very well lead to a file that is written to
   6947      in a record-oriented fashion.  That means that every write() will
   6948      write a separate record, which will be read separately by the
   6949      programs trying to read from it.  This can be very confusing.
   6951      The solution is to put a BIO filter in the way that will buffer
   6952      text until a linefeed is reached, and then write everything a
   6953      line at a time, so every record written will be an actual line,
   6954      not chunks of lines and not (usually doesn't happen, but I've
   6955      seen it once) several lines in one record.  BIO_f_linebuffer() is
   6956      the answer.
   6958      Currently, it's a VMS-only method, because that's where it has
   6959      been tested well enough.
   6960      [Richard Levitte]
   6962   *) Remove 'optimized' squaring variant in BN_mod_mul_montgomery,
   6963      it can return incorrect results.
   6964      (Note: The buggy variant was not enabled in OpenSSL 0.9.5a,
   6965      but it was in 0.9.6-beta[12].)
   6966      [Bodo Moeller]
   6968   *) Disable the check for content being present when verifying detached
   6969      signatures in pk7_smime.c. Some versions of Netscape (wrongly)
   6970      include zero length content when signing messages.
   6971      [Steve Henson]
   6973   *) New BIO_shutdown_wr macro, which invokes the BIO_C_SHUTDOWN_WR
   6974      BIO_ctrl (for BIO pairs).
   6975      [Bodo Mller]
   6977   *) Add DSO method for VMS.
   6978      [Richard Levitte]
   6980   *) Bug fix: Montgomery multiplication could produce results with the
   6981      wrong sign.
   6982      [Ulf Mller]
   6984   *) Add RPM specification openssl.spec and modify it to build three
   6985      packages.  The default package contains applications, application
   6986      documentation and run-time libraries.  The devel package contains
   6987      include files, static libraries and function documentation.  The
   6988      doc package contains the contents of the doc directory.  The original
   6989      openssl.spec was provided by Damien Miller <djm (a] mindrot.org>.
   6990      [Richard Levitte]
   6992   *) Add a large number of documentation files for many SSL routines.
   6993      [Lutz Jaenicke <Lutz.Jaenicke (a] aet.TU-Cottbus.DE>]
   6995   *) Add a configuration entry for Sony News 4.
   6996      [NAKAJI Hiroyuki <nakaji (a] tutrp.tut.ac.jp>]
   6998   *) Don't set the two most significant bits to one when generating a
   6999      random number < q in the DSA library.
   7000      [Ulf Mller]
   7002   *) New SSL API mode 'SSL_MODE_AUTO_RETRY'.  This disables the default
   7003      behaviour that SSL_read may result in SSL_ERROR_WANT_READ (even if
   7004      the underlying transport is blocking) if a handshake took place.
   7005      (The default behaviour is needed by applications such as s_client
   7006      and s_server that use select() to determine when to use SSL_read;
   7007      but for applications that know in advance when to expect data, it
   7008      just makes things more complicated.)
   7009      [Bodo Moeller]
   7011   *) Add RAND_egd_bytes(), which gives control over the number of bytes read
   7012      from EGD.
   7013      [Ben Laurie]
   7015   *) Add a few more EBCDIC conditionals that make `req' and `x509'
   7016      work better on such systems.
   7017      [Martin Kraemer <Martin.Kraemer (a] MchP.Siemens.De>]
   7019   *) Add two demo programs for PKCS12_parse() and PKCS12_create().
   7020      Update PKCS12_parse() so it copies the friendlyName and the
   7021      keyid to the certificates aux info.
   7022      [Steve Henson]
   7024   *) Fix bug in PKCS7_verify() which caused an infinite loop
   7025      if there was more than one signature.
   7026      [Sven Uszpelkat <su (a] celocom.de>]
   7028   *) Major change in util/mkdef.pl to include extra information
   7029      about each symbol, as well as presentig variables as well
   7030      as functions.  This change means that there's n more need
   7031      to rebuild the .num files when some algorithms are excluded.
   7032      [Richard Levitte]
   7034   *) Allow the verify time to be set by an application,
   7035      rather than always using the current time.
   7036      [Steve Henson]
   7038   *) Phase 2 verify code reorganisation. The certificate
   7039      verify code now looks up an issuer certificate by a
   7040      number of criteria: subject name, authority key id
   7041      and key usage. It also verifies self signed certificates
   7042      by the same criteria. The main comparison function is
   7043      X509_check_issued() which performs these checks.
   7045      Lot of changes were necessary in order to support this
   7046      without completely rewriting the lookup code.
   7048      Authority and subject key identifier are now cached.
   7050      The LHASH 'certs' is X509_STORE has now been replaced
   7051      by a STACK_OF(X509_OBJECT). This is mainly because an
   7052      LHASH can't store or retrieve multiple objects with
   7053      the same hash value.
   7055      As a result various functions (which were all internal
   7056      use only) have changed to handle the new X509_STORE
   7057      structure. This will break anything that messed round
   7058      with X509_STORE internally.
   7060      The functions X509_STORE_add_cert() now checks for an
   7061      exact match, rather than just subject name.
   7063      The X509_STORE API doesn't directly support the retrieval
   7064      of multiple certificates matching a given criteria, however
   7065      this can be worked round by performing a lookup first
   7066      (which will fill the cache with candidate certificates)
   7067      and then examining the cache for matches. This is probably
   7068      the best we can do without throwing out X509_LOOKUP
   7069      entirely (maybe later...).
   7071      The X509_VERIFY_CTX structure has been enhanced considerably.
   7073      All certificate lookup operations now go via a get_issuer()
   7074      callback. Although this currently uses an X509_STORE it
   7075      can be replaced by custom lookups. This is a simple way
   7076      to bypass the X509_STORE hackery necessary to make this
   7077      work and makes it possible to use more efficient techniques
   7078      in future. A very simple version which uses a simple
   7079      STACK for its trusted certificate store is also provided
   7080      using X509_STORE_CTX_trusted_stack().
   7082      The verify_cb() and verify() callbacks now have equivalents
   7083      in the X509_STORE_CTX structure.
   7085      X509_STORE_CTX also has a 'flags' field which can be used
   7086      to customise the verify behaviour.
   7087      [Steve Henson]
   7089   *) Add new PKCS#7 signing option PKCS7_NOSMIMECAP which 
   7090      excludes S/MIME capabilities.
   7091      [Steve Henson]
   7093   *) When a certificate request is read in keep a copy of the
   7094      original encoding of the signed data and use it when outputing
   7095      again. Signatures then use the original encoding rather than
   7096      a decoded, encoded version which may cause problems if the
   7097      request is improperly encoded.
   7098      [Steve Henson]
   7100   *) For consistency with other BIO_puts implementations, call
   7101      buffer_write(b, ...) directly in buffer_puts instead of calling
   7102      BIO_write(b, ...).
   7104      In BIO_puts, increment b->num_write as in BIO_write.
   7105      [Peter.Sylvester (a] EdelWeb.fr]
   7107   *) Fix BN_mul_word for the case where the word is 0. (We have to use
   7108      BN_zero, we may not return a BIGNUM with an array consisting of
   7109      words set to zero.)
   7110      [Bodo Moeller]
   7112   *) Avoid calling abort() from within the library when problems are
   7113      detected, except if preprocessor symbols have been defined
   7114      (such as REF_CHECK, BN_DEBUG etc.).
   7115      [Bodo Moeller]
   7117   *) New openssl application 'rsautl'. This utility can be
   7118      used for low level RSA operations. DER public key
   7119      BIO/fp routines also added.
   7120      [Steve Henson]
   7122   *) New Configure entry and patches for compiling on QNX 4.
   7123      [Andreas Schneider <andreas (a] ds3.etech.fh-hamburg.de>]
   7125   *) A demo state-machine implementation was sponsored by
   7126      Nuron (http://www.nuron.com/) and is now available in
   7127      demos/state_machine.
   7128      [Ben Laurie]
   7130   *) New options added to the 'dgst' utility for signature
   7131      generation and verification.
   7132      [Steve Henson]
   7134   *) Unrecognized PKCS#7 content types are now handled via a
   7135      catch all ASN1_TYPE structure. This allows unsupported
   7136      types to be stored as a "blob" and an application can
   7137      encode and decode it manually.
   7138      [Steve Henson]
   7140   *) Fix various signed/unsigned issues to make a_strex.c
   7141      compile under VC++.
   7142      [Oscar Jacobsson <oscar.jacobsson (a] celocom.com>]
   7144   *) ASN1 fixes. i2d_ASN1_OBJECT was not returning the correct
   7145      length if passed a buffer. ASN1_INTEGER_to_BN failed
   7146      if passed a NULL BN and its argument was negative.
   7147      [Steve Henson, pointed out by Sven Heiberg <sven (a] tartu.cyber.ee>]
   7149   *) Modification to PKCS#7 encoding routines to output definite
   7150      length encoding. Since currently the whole structures are in
   7151      memory there's not real point in using indefinite length 
   7152      constructed encoding. However if OpenSSL is compiled with
   7153      the flag PKCS7_INDEFINITE_ENCODING the old form is used.
   7154      [Steve Henson]
   7156   *) Added BIO_vprintf() and BIO_vsnprintf().
   7157      [Richard Levitte]
   7159   *) Added more prefixes to parse for in the the strings written
   7160      through a logging bio, to cover all the levels that are available
   7161      through syslog.  The prefixes are now:
   7164 	ALERT, ALR		=>	LOG_ALERT
   7165 	CRIT, CRI		=>	LOG_CRIT
   7166 	ERROR, ERR		=>	LOG_ERR
   7169 	INFO, INF		=>	LOG_INFO
   7170 	DEBUG, DBG		=>	LOG_DEBUG
   7172      and as before, if none of those prefixes are present at the
   7173      beginning of the string, LOG_ERR is chosen.
   7175      On Win32, the LOG_* levels are mapped according to this:
   7181      [Richard Levitte]
   7183   *) Made it possible to reconfigure with just the configuration
   7184      argument "reconf" or "reconfigure".  The command line arguments
   7185      are stored in Makefile.ssl in the variable CONFIGURE_ARGS,
   7186      and are retrieved from there when reconfiguring.
   7187      [Richard Levitte]
   7189   *) MD4 implemented.
   7190      [Assar Westerlund <assar (a] sics.se>, Richard Levitte]
   7192   *) Add the arguments -CAfile and -CApath to the pkcs12 utility.
   7193      [Richard Levitte]
   7195   *) The obj_dat.pl script was messing up the sorting of object
   7196      names. The reason was that it compared the quoted version
   7197      of strings as a result "OCSP" > "OCSP Signing" because
   7198      " > SPACE. Changed script to store unquoted versions of
   7199      names and add quotes on output. It was also omitting some
   7200      names from the lookup table if they were given a default
   7201      value (that is if SN is missing it is given the same
   7202      value as LN and vice versa), these are now added on the
   7203      grounds that if an object has a name we should be able to
   7204      look it up. Finally added warning output when duplicate
   7205      short or long names are found.
   7206      [Steve Henson]
   7208   *) Changes needed for Tandem NSK.
   7209      [Scott Uroff <scott (a] xypro.com>]
   7211   *) Fix SSL 2.0 rollback checking: Due to an off-by-one error in
   7212      RSA_padding_check_SSLv23(), special padding was never detected
   7213      and thus the SSL 3.0/TLS 1.0 countermeasure against protocol
   7214      version rollback attacks was not effective.
   7216      In s23_clnt.c, don't use special rollback-attack detection padding
   7217      (RSA_SSLV23_PADDING) if SSL 2.0 is the only protocol enabled in the
   7218      client; similarly, in s23_srvr.c, don't do the rollback check if
   7219      SSL 2.0 is the only protocol enabled in the server.
   7220      [Bodo Moeller]
   7222   *) Make it possible to get hexdumps of unprintable data with 'openssl
   7223      asn1parse'.  By implication, the functions ASN1_parse_dump() and
   7224      BIO_dump_indent() are added.
   7225      [Richard Levitte]
   7227   *) New functions ASN1_STRING_print_ex() and X509_NAME_print_ex()
   7228      these print out strings and name structures based on various
   7229      flags including RFC2253 support and proper handling of
   7230      multibyte characters. Added options to the 'x509' utility 
   7231      to allow the various flags to be set.
   7232      [Steve Henson]
   7234   *) Various fixes to use ASN1_TIME instead of ASN1_UTCTIME.
   7235      Also change the functions X509_cmp_current_time() and
   7236      X509_gmtime_adj() work with an ASN1_TIME structure,
   7237      this will enable certificates using GeneralizedTime in validity
   7238      dates to be checked.
   7239      [Steve Henson]
   7241   *) Make the NEG_PUBKEY_BUG code (which tolerates invalid
   7242      negative public key encodings) on by default,
   7243      NO_NEG_PUBKEY_BUG can be set to disable it.
   7244      [Steve Henson]
   7246   *) New function c2i_ASN1_OBJECT() which acts on ASN1_OBJECT
   7247      content octets. An i2c_ASN1_OBJECT is unnecessary because
   7248      the encoding can be trivially obtained from the structure.
   7249      [Steve Henson]
   7251   *) crypto/err.c locking bugfix: Use write locks (CRYPTO_w_[un]lock),
   7252      not read locks (CRYPTO_r_[un]lock).
   7253      [Bodo Moeller]
   7255   *) A first attempt at creating official support for shared
   7256      libraries through configuration.  I've kept it so the
   7257      default is static libraries only, and the OpenSSL programs
   7258      are always statically linked for now, but there are
   7259      preparations for dynamic linking in place.
   7260      This has been tested on Linux and Tru64.
   7261      [Richard Levitte]
   7263   *) Randomness polling function for Win9x, as described in:
   7264      Peter Gutmann, Software Generation of Practically Strong
   7265      Random Numbers.
   7266      [Ulf Mller]
   7268   *) Fix so PRNG is seeded in req if using an already existing
   7269      DSA key.
   7270      [Steve Henson]
   7272   *) New options to smime application. -inform and -outform
   7273      allow alternative formats for the S/MIME message including
   7274      PEM and DER. The -content option allows the content to be
   7275      specified separately. This should allow things like Netscape
   7276      form signing output easier to verify.
   7277      [Steve Henson]
   7279   *) Fix the ASN1 encoding of tags using the 'long form'.
   7280      [Steve Henson]
   7282   *) New ASN1 functions, i2c_* and c2i_* for INTEGER and BIT
   7283      STRING types. These convert content octets to and from the
   7284      underlying type. The actual tag and length octets are
   7285      already assumed to have been read in and checked. These
   7286      are needed because all other string types have virtually
   7287      identical handling apart from the tag. By having versions
   7288      of the ASN1 functions that just operate on content octets
   7289      IMPLICIT tagging can be handled properly. It also allows
   7290      the ASN1_ENUMERATED code to be cut down because ASN1_ENUMERATED
   7291      and ASN1_INTEGER are identical apart from the tag.
   7292      [Steve Henson]
   7294   *) Change the handling of OID objects as follows:
   7296      - New object identifiers are inserted in objects.txt, following
   7297        the syntax given in objects.README.
   7298      - objects.pl is used to process obj_mac.num and create a new
   7299        obj_mac.h.
   7300      - obj_dat.pl is used to create a new obj_dat.h, using the data in
   7301        obj_mac.h.
   7303      This is currently kind of a hack, and the perl code in objects.pl
   7304      isn't very elegant, but it works as I intended.  The simplest way
   7305      to check that it worked correctly is to look in obj_dat.h and
   7306      check the array nid_objs and make sure the objects haven't moved
   7307      around (this is important!).  Additions are OK, as well as
   7308      consistent name changes. 
   7309      [Richard Levitte]
   7311   *) Add BSD-style MD5-based passwords to 'openssl passwd' (option '-1').
   7312      [Bodo Moeller]
   7314   *) Addition of the command line parameter '-rand file' to 'openssl req'.
   7315      The given file adds to whatever has already been seeded into the
   7316      random pool through the RANDFILE configuration file option or
   7317      environment variable, or the default random state file.
   7318      [Richard Levitte]
   7320   *) mkstack.pl now sorts each macro group into lexical order.
   7321      Previously the output order depended on the order the files
   7322      appeared in the directory, resulting in needless rewriting
   7323      of safestack.h .
   7324      [Steve Henson]
   7326   *) Patches to make OpenSSL compile under Win32 again. Mostly
   7327      work arounds for the VC++ problem that it treats func() as
   7328      func(void). Also stripped out the parts of mkdef.pl that
   7329      added extra typesafe functions: these no longer exist.
   7330      [Steve Henson]
   7332   *) Reorganisation of the stack code. The macros are now all 
   7333      collected in safestack.h . Each macro is defined in terms of
   7334      a "stack macro" of the form SKM_<name>(type, a, b). The 
   7335      DEBUG_SAFESTACK is now handled in terms of function casts,
   7336      this has the advantage of retaining type safety without the
   7337      use of additional functions. If DEBUG_SAFESTACK is not defined
   7338      then the non typesafe macros are used instead. Also modified the
   7339      mkstack.pl script to handle the new form. Needs testing to see
   7340      if which (if any) compilers it chokes and maybe make DEBUG_SAFESTACK
   7341      the default if no major problems. Similar behaviour for ASN1_SET_OF
   7342      and PKCS12_STACK_OF.
   7343      [Steve Henson]
   7345   *) When some versions of IIS use the 'NET' form of private key the
   7346      key derivation algorithm is different. Normally MD5(password) is
   7347      used as a 128 bit RC4 key. In the modified case
   7348      MD5(MD5(password) + "SGCKEYSALT")  is used insted. Added some
   7349      new functions i2d_RSA_NET(), d2i_RSA_NET() etc which are the same
   7350      as the old Netscape_RSA functions except they have an additional
   7351      'sgckey' parameter which uses the modified algorithm. Also added
   7352      an -sgckey command line option to the rsa utility. Thanks to 
   7353      Adrian Peck <bertie (a] ncipher.com> for posting details of the modified
   7354      algorithm to openssl-dev.
   7355      [Steve Henson]
   7357   *) The evp_local.h macros were using 'c.##kname' which resulted in
   7358      invalid expansion on some systems (SCO 5.0.5 for example).
   7359      Corrected to 'c.kname'.
   7360      [Phillip Porch <root (a] theporch.com>]
   7362   *) New X509_get1_email() and X509_REQ_get1_email() functions that return
   7363      a STACK of email addresses from a certificate or request, these look
   7364      in the subject name and the subject alternative name extensions and 
   7365      omit any duplicate addresses.
   7366      [Steve Henson]
   7368   *) Re-implement BN_mod_exp2_mont using independent (and larger) windows.
   7369      This makes DSA verification about 2 % faster.
   7370      [Bodo Moeller]
   7372   *) Increase maximum window size in BN_mod_exp_... to 6 bits instead of 5
   7373      (meaning that now 2^5 values will be precomputed, which is only 4 KB
   7374      plus overhead for 1024 bit moduli).
   7375      This makes exponentiations about 0.5 % faster for 1024 bit
   7376      exponents (as measured by "openssl speed rsa2048").
   7377      [Bodo Moeller]
   7379   *) Rename memory handling macros to avoid conflicts with other
   7380      software:
   7381           Malloc         =>  OPENSSL_malloc
   7382           Malloc_locked  =>  OPENSSL_malloc_locked
   7383           Realloc        =>  OPENSSL_realloc
   7384           Free           =>  OPENSSL_free
   7385      [Richard Levitte]
   7387   *) New function BN_mod_exp_mont_word for small bases (roughly 15%
   7388      faster than BN_mod_exp_mont, i.e. 7% for a full DH exchange).
   7389      [Bodo Moeller]
   7391   *) CygWin32 support.
   7392      [John Jarvie <jjarvie (a] newsguy.com>]
   7394   *) The type-safe stack code has been rejigged. It is now only compiled
   7395      in when OpenSSL is configured with the DEBUG_SAFESTACK option and
   7396      by default all type-specific stack functions are "#define"d back to
   7397      standard stack functions. This results in more streamlined output
   7398      but retains the type-safety checking possibilities of the original
   7399      approach.
   7400      [Geoff Thorpe]
   7402   *) The STACK code has been cleaned up, and certain type declarations
   7403      that didn't make a lot of sense have been brought in line. This has
   7404      also involved a cleanup of sorts in safestack.h to more correctly
   7405      map type-safe stack functions onto their plain stack counterparts.
   7406      This work has also resulted in a variety of "const"ifications of
   7407      lots of the code, especially "_cmp" operations which should normally
   7408      be prototyped with "const" parameters anyway.
   7409      [Geoff Thorpe]
   7411   *) When generating bytes for the first time in md_rand.c, 'stir the pool'
   7412      by seeding with STATE_SIZE dummy bytes (with zero entropy count).
   7413      (The PRNG state consists of two parts, the large pool 'state' and 'md',
   7414      where all of 'md' is used each time the PRNG is used, but 'state'
   7415      is used only indexed by a cyclic counter. As entropy may not be
   7416      well distributed from the beginning, 'md' is important as a
   7417      chaining variable. However, the output function chains only half
   7418      of 'md', i.e. 80 bits.  ssleay_rand_add, on the other hand, chains
   7419      all of 'md', and seeding with STATE_SIZE dummy bytes will result
   7420      in all of 'state' being rewritten, with the new values depending
   7421      on virtually all of 'md'.  This overcomes the 80 bit limitation.)
   7422      [Bodo Moeller]
   7424   *) In ssl/s2_clnt.c and ssl/s3_clnt.c, call ERR_clear_error() when
   7425      the handshake is continued after ssl_verify_cert_chain();
   7426      otherwise, if SSL_VERIFY_NONE is set, remaining error codes
   7427      can lead to 'unexplainable' connection aborts later.
   7428      [Bodo Moeller; problem tracked down by Lutz Jaenicke]
   7430   *) Major EVP API cipher revision.
   7431      Add hooks for extra EVP features. This allows various cipher
   7432      parameters to be set in the EVP interface. Support added for variable
   7433      key length ciphers via the EVP_CIPHER_CTX_set_key_length() function and
   7434      setting of RC2 and RC5 parameters.
   7436      Modify EVP_OpenInit() and EVP_SealInit() to cope with variable key length
   7437      ciphers.
   7439      Remove lots of duplicated code from the EVP library. For example *every*
   7440      cipher init() function handles the 'iv' in the same way according to the
   7441      cipher mode. They also all do nothing if the 'key' parameter is NULL and
   7442      for CFB and OFB modes they zero ctx->num.
   7444      New functionality allows removal of S/MIME code RC2 hack.
   7446      Most of the routines have the same form and so can be declared in terms
   7447      of macros.
   7449      By shifting this to the top level EVP_CipherInit() it can be removed from
   7450      all individual ciphers. If the cipher wants to handle IVs or keys
   7451      differently it can set the EVP_CIPH_CUSTOM_IV or EVP_CIPH_ALWAYS_CALL_INIT
   7452      flags.
   7454      Change lots of functions like EVP_EncryptUpdate() to now return a
   7455      value: although software versions of the algorithms cannot fail
   7456      any installed hardware versions can.
   7457      [Steve Henson]
   7459   *) Implement SSL_OP_TLS_ROLLBACK_BUG: In ssl3_get_client_key_exchange, if
   7460      this option is set, tolerate broken clients that send the negotiated
   7461      protocol version number instead of the requested protocol version
   7462      number.
   7463      [Bodo Moeller]
   7465   *) Call dh_tmp_cb (set by ..._TMP_DH_CB) with correct 'is_export' flag;
   7466      i.e. non-zero for export ciphersuites, zero otherwise.
   7467      Previous versions had this flag inverted, inconsistent with
   7468      rsa_tmp_cb (..._TMP_RSA_CB).
   7469      [Bodo Moeller; problem reported by Amit Chopra]
   7471   *) Add missing DSA library text string. Work around for some IIS
   7472      key files with invalid SEQUENCE encoding.
   7473      [Steve Henson]
   7475   *) Add a document (doc/standards.txt) that list all kinds of standards
   7476      and so on that are implemented in OpenSSL.
   7477      [Richard Levitte]
   7479   *) Enhance c_rehash script. Old version would mishandle certificates
   7480      with the same subject name hash and wouldn't handle CRLs at all.
   7481      Added -fingerprint option to crl utility, to support new c_rehash
   7482      features.
   7483      [Steve Henson]
   7485   *) Eliminate non-ANSI declarations in crypto.h and stack.h.
   7486      [Ulf Mller]
   7488   *) Fix for SSL server purpose checking. Server checking was
   7489      rejecting certificates which had extended key usage present
   7490      but no ssl client purpose.
   7491      [Steve Henson, reported by Rene Grosser <grosser (a] hisolutions.com>]
   7493   *) Make PKCS#12 code work with no password. The PKCS#12 spec
   7494      is a little unclear about how a blank password is handled.
   7495      Since the password in encoded as a BMPString with terminating
   7496      double NULL a zero length password would end up as just the
   7497      double NULL. However no password at all is different and is
   7498      handled differently in the PKCS#12 key generation code. NS
   7499      treats a blank password as zero length. MSIE treats it as no
   7500      password on export: but it will try both on import. We now do
   7501      the same: PKCS12_parse() tries zero length and no password if
   7502      the password is set to "" or NULL (NULL is now a valid password:
   7503      it wasn't before) as does the pkcs12 application.
   7504      [Steve Henson]
   7506   *) Bugfixes in apps/x509.c: Avoid a memory leak; and don't use
   7507      perror when PEM_read_bio_X509_REQ fails, the error message must
   7508      be obtained from the error queue.
   7509      [Bodo Moeller]
   7511   *) Avoid 'thread_hash' memory leak in crypto/err/err.c by freeing
   7512      it in ERR_remove_state if appropriate, and change ERR_get_state
   7513      accordingly to avoid race conditions (this is necessary because
   7514      thread_hash is no longer constant once set).
   7515      [Bodo Moeller]
   7517   *) Bugfix for linux-elf makefile.one.
   7518      [Ulf Mller]
   7520   *) RSA_get_default_method() will now cause a default
   7521      RSA_METHOD to be chosen if one doesn't exist already.
   7522      Previously this was only set during a call to RSA_new()
   7523      or RSA_new_method(NULL) meaning it was possible for
   7524      RSA_get_default_method() to return NULL.
   7525      [Geoff Thorpe]
   7527   *) Added native name translation to the existing DSO code
   7528      that will convert (if the flag to do so is set) filenames
   7529      that are sufficiently small and have no path information
   7530      into a canonical native form. Eg. "blah" converted to
   7531      "libblah.so" or "blah.dll" etc.
   7532      [Geoff Thorpe]
   7534   *) New function ERR_error_string_n(e, buf, len) which is like
   7535      ERR_error_string(e, buf), but writes at most 'len' bytes
   7536      including the 0 terminator.  For ERR_error_string_n, 'buf'
   7537      may not be NULL.
   7538      [Damien Miller <djm (a] mindrot.org>, Bodo Moeller]
   7540   *) CONF library reworked to become more general.  A new CONF
   7541      configuration file reader "class" is implemented as well as a
   7542      new functions (NCONF_*, for "New CONF") to handle it.  The now
   7543      old CONF_* functions are still there, but are reimplemented to
   7544      work in terms of the new functions.  Also, a set of functions
   7545      to handle the internal storage of the configuration data is
   7546      provided to make it easier to write new configuration file
   7547      reader "classes" (I can definitely see something reading a
   7548      configuration file in XML format, for example), called _CONF_*,
   7549      or "the configuration storage API"...
   7551      The new configuration file reading functions are:
   7553         NCONF_new, NCONF_free, NCONF_load, NCONF_load_fp, NCONF_load_bio,
   7554         NCONF_get_section, NCONF_get_string, NCONF_get_numbre
   7556         NCONF_default, NCONF_WIN32
   7558         NCONF_dump_fp, NCONF_dump_bio
   7560      NCONF_default and NCONF_WIN32 are method (or "class") choosers,
   7561      NCONF_new creates a new CONF object.  This works in the same way
   7562      as other interfaces in OpenSSL, like the BIO interface.
   7563      NCONF_dump_* dump the internal storage of the configuration file,
   7564      which is useful for debugging.  All other functions take the same
   7565      arguments as the old CONF_* functions wth the exception of the
   7566      first that must be a `CONF *' instead of a `LHASH *'.
   7568      To make it easer to use the new classes with the old CONF_* functions,
   7569      the function CONF_set_default_method is provided.
   7570      [Richard Levitte]
   7572   *) Add '-tls1' option to 'openssl ciphers', which was already
   7573      mentioned in the documentation but had not been implemented.
   7574      (This option is not yet really useful because even the additional
   7575      experimental TLS 1.0 ciphers are currently treated as SSL 3.0 ciphers.)
   7576      [Bodo Moeller]
   7578   *) Initial DSO code added into libcrypto for letting OpenSSL (and
   7579      OpenSSL-based applications) load shared libraries and bind to
   7580      them in a portable way.
   7581      [Geoff Thorpe, with contributions from Richard Levitte]
   7583  Changes between 0.9.5 and 0.9.5a  [1 Apr 2000]
   7585   *) Make sure _lrotl and _lrotr are only used with MSVC.
   7587   *) Use lock CRYPTO_LOCK_RAND correctly in ssleay_rand_status
   7588      (the default implementation of RAND_status).
   7590   *) Rename openssl x509 option '-crlext', which was added in 0.9.5,
   7591      to '-clrext' (= clear extensions), as intended and documented.
   7592      [Bodo Moeller; inconsistency pointed out by Michael Attili
   7593      <attili (a] amaxo.com>]
   7595   *) Fix for HMAC. It wasn't zeroing the rest of the block if the key length
   7596      was larger than the MD block size.      
   7597      [Steve Henson, pointed out by Yost William <YostW (a] tce.com>]
   7599   *) Modernise PKCS12_parse() so it uses STACK_OF(X509) for its ca argument
   7600      fix a leak when the ca argument was passed as NULL. Stop X509_PUBKEY_set()
   7601      using the passed key: if the passed key was a private key the result
   7602      of X509_print(), for example, would be to print out all the private key
   7603      components.
   7604      [Steve Henson]
   7606   *) des_quad_cksum() byte order bug fix.
   7607      [Ulf Mller, using the problem description in krb4-0.9.7, where
   7608       the solution is attributed to Derrick J Brashear <shadow (a] DEMENTIA.ORG>]
   7610   *) Fix so V_ASN1_APP_CHOOSE works again: however its use is strongly
   7611      discouraged.
   7612      [Steve Henson, pointed out by Brian Korver <briank (a] cs.stanford.edu>]
   7614   *) For easily testing in shell scripts whether some command
   7615      'openssl XXX' exists, the new pseudo-command 'openssl no-XXX'
   7616      returns with exit code 0 iff no command of the given name is available.
   7617      'no-XXX' is printed in this case, 'XXX' otherwise.  In both cases,
   7618      the output goes to stdout and nothing is printed to stderr.
   7619      Additional arguments are always ignored.
   7621      Since for each cipher there is a command of the same name,
   7622      the 'no-cipher' compilation switches can be tested this way.
   7624      ('openssl no-XXX' is not able to detect pseudo-commands such
   7625      as 'quit', 'list-XXX-commands', or 'no-XXX' itself.)
   7626      [Bodo Moeller]
   7628   *) Update test suite so that 'make test' succeeds in 'no-rsa' configuration.
   7629      [Bodo Moeller]
   7631   *) For SSL_[CTX_]set_tmp_dh, don't create a DH key if SSL_OP_SINGLE_DH_USE
   7632      is set; it will be thrown away anyway because each handshake creates
   7633      its own key.
   7634      ssl_cert_dup, which is used by SSL_new, now copies DH keys in addition
   7635      to parameters -- in previous versions (since OpenSSL 0.9.3) the
   7636      'default key' from SSL_CTX_set_tmp_dh would always be lost, meanining
   7637      you effectivly got SSL_OP_SINGLE_DH_USE when using this macro.
   7638      [Bodo Moeller]
   7640   *) New s_client option -ign_eof: EOF at stdin is ignored, and
   7641      'Q' and 'R' lose their special meanings (quit/renegotiate).
   7642      This is part of what -quiet does; unlike -quiet, -ign_eof
   7643      does not suppress any output.
   7644      [Richard Levitte]
   7646   *) Add compatibility options to the purpose and trust code. The
   7647      purpose X509_PURPOSE_ANY is "any purpose" which automatically
   7648      accepts a certificate or CA, this was the previous behaviour,
   7649      with all the associated security issues.
   7651      X509_TRUST_COMPAT is the old trust behaviour: only and
   7652      automatically trust self signed roots in certificate store. A
   7653      new trust setting X509_TRUST_DEFAULT is used to specify that
   7654      a purpose has no associated trust setting and it should instead
   7655      use the value in the default purpose.
   7656      [Steve Henson]
   7658   *) Fix the PKCS#8 DSA private key code so it decodes keys again
   7659      and fix a memory leak.
   7660      [Steve Henson]
   7662   *) In util/mkerr.pl (which implements 'make errors'), preserve
   7663      reason strings from the previous version of the .c file, as
   7664      the default to have only downcase letters (and digits) in
   7665      automatically generated reasons codes is not always appropriate.
   7666      [Bodo Moeller]
   7668   *) In ERR_load_ERR_strings(), build an ERR_LIB_SYS error reason table
   7669      using strerror.  Previously, ERR_reason_error_string() returned
   7670      library names as reason strings for SYSerr; but SYSerr is a special
   7671      case where small numbers are errno values, not library numbers.
   7672      [Bodo Moeller]
   7674   *) Add '-dsaparam' option to 'openssl dhparam' application.  This
   7675      converts DSA parameters into DH parameters. (When creating parameters,
   7676      DSA_generate_parameters is used.)
   7677      [Bodo Moeller]
   7679   *) Include 'length' (recommended exponent length) in C code generated
   7680      by 'openssl dhparam -C'.
   7681      [Bodo Moeller]
   7683   *) The second argument to set_label in perlasm was already being used
   7684      so couldn't be used as a "file scope" flag. Moved to third argument
   7685      which was free.
   7686      [Steve Henson]
   7688   *) In PEM_ASN1_write_bio and some other functions, use RAND_pseudo_bytes
   7689      instead of RAND_bytes for encryption IVs and salts.
   7690      [Bodo Moeller]
   7692   *) Include RAND_status() into RAND_METHOD instead of implementing
   7693      it only for md_rand.c  Otherwise replacing the PRNG by calling
   7694      RAND_set_rand_method would be impossible.
   7695      [Bodo Moeller]
   7697   *) Don't let DSA_generate_key() enter an infinite loop if the random
   7698      number generation fails.
   7699      [Bodo Moeller]
   7701   *) New 'rand' application for creating pseudo-random output.
   7702      [Bodo Moeller]
   7704   *) Added configuration support for Linux/IA64
   7705      [Rolf Haberrecker <rolf (a] suse.de>]
   7707   *) Assembler module support for Mingw32.
   7708      [Ulf Mller]
   7710   *) Shared library support for HPUX (in shlib/).
   7711      [Lutz Jaenicke <Lutz.Jaenicke (a] aet.TU-Cottbus.DE> and Anonymous]
   7713   *) Shared library support for Solaris gcc.
   7714      [Lutz Behnke <behnke (a] trustcenter.de>]
   7716  Changes between 0.9.4 and 0.9.5  [28 Feb 2000]
   7718   *) PKCS7_encrypt() was adding text MIME headers twice because they
   7719      were added manually and by SMIME_crlf_copy().
   7720      [Steve Henson]
   7722   *) In bntest.c don't call BN_rand with zero bits argument.
   7723      [Steve Henson, pointed out by Andrew W. Gray <agray (a] iconsinc.com>]
   7725   *) BN_mul bugfix: In bn_mul_part_recursion() only the a>a[n] && b>b[n]
   7726      case was implemented. This caused BN_div_recp() to fail occasionally.
   7727      [Ulf Mller]
   7729   *) Add an optional second argument to the set_label() in the perl
   7730      assembly language builder. If this argument exists and is set
   7731      to 1 it signals that the assembler should use a symbol whose 
   7732      scope is the entire file, not just the current function. This
   7733      is needed with MASM which uses the format label:: for this scope.
   7734      [Steve Henson, pointed out by Peter Runestig <peter (a] runestig.com>]
   7736   *) Change the ASN1 types so they are typedefs by default. Before
   7737      almost all types were #define'd to ASN1_STRING which was causing
   7738      STACK_OF() problems: you couldn't declare STACK_OF(ASN1_UTF8STRING)
   7739      for example.
   7740      [Steve Henson]
   7742   *) Change names of new functions to the new get1/get0 naming
   7743      convention: After 'get1', the caller owns a reference count
   7744      and has to call ..._free; 'get0' returns a pointer to some
   7745      data structure without incrementing reference counters.
   7746      (Some of the existing 'get' functions increment a reference
   7747      counter, some don't.)
   7748      Similarly, 'set1' and 'add1' functions increase reference
   7749      counters or duplicate objects.
   7750      [Steve Henson]
   7752   *) Allow for the possibility of temp RSA key generation failure:
   7753      the code used to assume it always worked and crashed on failure.
   7754      [Steve Henson]
   7756   *) Fix potential buffer overrun problem in BIO_printf().
   7757      [Ulf Mller, using public domain code by Patrick Powell; problem
   7758       pointed out by David Sacerdote <das33 (a] cornell.edu>]
   7760   *) Support EGD <http://www.lothar.com/tech/crypto/>.  New functions
   7761      RAND_egd() and RAND_status().  In the command line application,
   7762      the EGD socket can be specified like a seed file using RANDFILE
   7763      or -rand.
   7764      [Ulf Mller]
   7766   *) Allow the string CERTIFICATE to be tolerated in PKCS#7 structures.
   7767      Some CAs (e.g. Verisign) distribute certificates in this form.
   7768      [Steve Henson]
   7770   *) Remove the SSL_ALLOW_ADH compile option and set the default cipher
   7771      list to exclude them. This means that no special compilation option
   7772      is needed to use anonymous DH: it just needs to be included in the
   7773      cipher list.
   7774      [Steve Henson]
   7776   *) Change the EVP_MD_CTX_type macro so its meaning consistent with
   7777      EVP_MD_type. The old functionality is available in a new macro called
   7778      EVP_MD_md(). Change code that uses it and update docs.
   7779      [Steve Henson]
   7781   *) ..._ctrl functions now have corresponding ..._callback_ctrl functions
   7782      where the 'void *' argument is replaced by a function pointer argument.
   7783      Previously 'void *' was abused to point to functions, which works on
   7784      many platforms, but is not correct.  As these functions are usually
   7785      called by macros defined in OpenSSL header files, most source code
   7786      should work without changes.
   7787      [Richard Levitte]
   7789   *) <openssl/opensslconf.h> (which is created by Configure) now contains
   7790      sections with information on -D... compiler switches used for
   7791      compiling the library so that applications can see them.  To enable
   7792      one of these sections, a pre-processor symbol OPENSSL_..._DEFINES
   7793      must be defined.  E.g.,
   7794         #define OPENSSL_ALGORITHM_DEFINES
   7795         #include <openssl/opensslconf.h>
   7796      defines all pertinent NO_<algo> symbols, such as NO_IDEA, NO_RSA, etc.
   7797      [Richard Levitte, Ulf and Bodo Mller]
   7799   *) Bugfix: Tolerate fragmentation and interleaving in the SSL 3/TLS
   7800      record layer.
   7801      [Bodo Moeller]
   7803   *) Change the 'other' type in certificate aux info to a STACK_OF
   7804      X509_ALGOR. Although not an AlgorithmIdentifier as such it has
   7805      the required ASN1 format: arbitrary types determined by an OID.
   7806      [Steve Henson]
   7808   *) Add some PEM_write_X509_REQ_NEW() functions and a command line
   7809      argument to 'req'. This is not because the function is newer or
   7810      better than others it just uses the work 'NEW' in the certificate
   7811      request header lines. Some software needs this.
   7812      [Steve Henson]
   7814   *) Reorganise password command line arguments: now passwords can be
   7815      obtained from various sources. Delete the PEM_cb function and make
   7816      it the default behaviour: i.e. if the callback is NULL and the
   7817      usrdata argument is not NULL interpret it as a null terminated pass
   7818      phrase. If usrdata and the callback are NULL then the pass phrase
   7819      is prompted for as usual.
   7820      [Steve Henson]
   7822   *) Add support for the Compaq Atalla crypto accelerator. If it is installed,
   7823      the support is automatically enabled. The resulting binaries will
   7824      autodetect the card and use it if present.
   7825      [Ben Laurie and Compaq Inc.]
   7827   *) Work around for Netscape hang bug. This sends certificate request
   7828      and server done in one record. Since this is perfectly legal in the
   7829      SSL/TLS protocol it isn't a "bug" option and is on by default. See
   7830      the bugs/SSLv3 entry for more info.
   7831      [Steve Henson]
   7833   *) HP-UX tune-up: new unified configs, HP C compiler bug workaround.
   7834      [Andy Polyakov]
   7836   *) Add -rand argument to smime and pkcs12 applications and read/write
   7837      of seed file.
   7838      [Steve Henson]
   7840   *) New 'passwd' tool for crypt(3) and apr1 password hashes.
   7841      [Bodo Moeller]
   7843   *) Add command line password options to the remaining applications.
   7844      [Steve Henson]
   7846   *) Bug fix for BN_div_recp() for numerators with an even number of
   7847      bits.
   7848      [Ulf Mller]
   7850   *) More tests in bntest.c, and changed test_bn output.
   7851      [Ulf Mller]
   7853   *) ./config recognizes MacOS X now.
   7854      [Andy Polyakov]
   7856   *) Bug fix for BN_div() when the first words of num and divsor are
   7857      equal (it gave wrong results if (rem=(n1-q*d0)&BN_MASK2) < d0).
   7858      [Ulf Mller]
   7860   *) Add support for various broken PKCS#8 formats, and command line
   7861      options to produce them.
   7862      [Steve Henson]
   7864   *) New functions BN_CTX_start(), BN_CTX_get() and BT_CTX_end() to
   7865      get temporary BIGNUMs from a BN_CTX.
   7866      [Ulf Mller]
   7868   *) Correct return values in BN_mod_exp_mont() and BN_mod_exp2_mont()
   7869      for p == 0.
   7870      [Ulf Mller]
   7872   *) Change the SSLeay_add_all_*() functions to OpenSSL_add_all_*() and
   7873      include a #define from the old name to the new. The original intent
   7874      was that statically linked binaries could for example just call
   7875      SSLeay_add_all_ciphers() to just add ciphers to the table and not
   7876      link with digests. This never worked becayse SSLeay_add_all_digests()
   7877      and SSLeay_add_all_ciphers() were in the same source file so calling
   7878      one would link with the other. They are now in separate source files.
   7879      [Steve Henson]
   7881   *) Add a new -notext option to 'ca' and a -pubkey option to 'spkac'.
   7882      [Steve Henson]
   7884   *) Use a less unusual form of the Miller-Rabin primality test (it used
   7885      a binary algorithm for exponentiation integrated into the Miller-Rabin
   7886      loop, our standard modexp algorithms are faster).
   7887      [Bodo Moeller]
   7889   *) Support for the EBCDIC character set completed.
   7890      [Martin Kraemer <Martin.Kraemer (a] Mch.SNI.De>]
   7892   *) Source code cleanups: use const where appropriate, eliminate casts,
   7893      use void * instead of char * in lhash.
   7894      [Ulf Mller] 
   7896   *) Bugfix: ssl3_send_server_key_exchange was not restartable
   7897      (the state was not changed to SSL3_ST_SW_KEY_EXCH_B, and because of
   7898      this the server could overwrite ephemeral keys that the client
   7899      has already seen).
   7900      [Bodo Moeller]
   7902   *) Turn DSA_is_prime into a macro that calls BN_is_prime,
   7903      using 50 iterations of the Rabin-Miller test.
   7905      DSA_generate_parameters now uses BN_is_prime_fasttest (with 50
   7906      iterations of the Rabin-Miller test as required by the appendix
   7907      to FIPS PUB 186[-1]) instead of DSA_is_prime.
   7908      As BN_is_prime_fasttest includes trial division, DSA parameter
   7909      generation becomes much faster.
   7911      This implies a change for the callback functions in DSA_is_prime
   7912      and DSA_generate_parameters: The callback function is called once
   7913      for each positive witness in the Rabin-Miller test, not just
   7914      occasionally in the inner loop; and the parameters to the
   7915      callback function now provide an iteration count for the outer
   7916      loop rather than for the current invocation of the inner loop.
   7917      DSA_generate_parameters additionally can call the callback
   7918      function with an 'iteration count' of -1, meaning that a
   7919      candidate has passed the trial division test (when q is generated 
   7920      from an application-provided seed, trial division is skipped).
   7921      [Bodo Moeller]
   7923   *) New function BN_is_prime_fasttest that optionally does trial
   7924      division before starting the Rabin-Miller test and has
   7925      an additional BN_CTX * argument (whereas BN_is_prime always
   7926      has to allocate at least one BN_CTX).
   7927      'callback(1, -1, cb_arg)' is called when a number has passed the
   7928      trial division stage.
   7929      [Bodo Moeller]
   7931   *) Fix for bug in CRL encoding. The validity dates weren't being handled
   7932      as ASN1_TIME.
   7933      [Steve Henson]
   7935   *) New -pkcs12 option to CA.pl script to write out a PKCS#12 file.
   7936      [Steve Henson]
   7938   *) New function BN_pseudo_rand().
   7939      [Ulf Mller]
   7941   *) Clean up BN_mod_mul_montgomery(): replace the broken (and unreadable)
   7942      bignum version of BN_from_montgomery() with the working code from
   7943      SSLeay 0.9.0 (the word based version is faster anyway), and clean up
   7944      the comments.
   7945      [Ulf Mller]
   7947   *) Avoid a race condition in s2_clnt.c (function get_server_hello) that
   7948      made it impossible to use the same SSL_SESSION data structure in
   7949      SSL2 clients in multiple threads.
   7950      [Bodo Moeller]
   7952   *) The return value of RAND_load_file() no longer counts bytes obtained
   7953      by stat().  RAND_load_file(..., -1) is new and uses the complete file
   7954      to seed the PRNG (previously an explicit byte count was required).
   7955      [Ulf Mller, Bodo Mller]
   7957   *) Clean up CRYPTO_EX_DATA functions, some of these didn't have prototypes
   7958      used (char *) instead of (void *) and had casts all over the place.
   7959      [Steve Henson]
   7961   *) Make BN_generate_prime() return NULL on error if ret!=NULL.
   7962      [Ulf Mller]
   7964   *) Retain source code compatibility for BN_prime_checks macro:
   7965      BN_is_prime(..., BN_prime_checks, ...) now uses
   7966      BN_prime_checks_for_size to determine the appropriate number of
   7967      Rabin-Miller iterations.
   7968      [Ulf Mller]
   7970   *) Diffie-Hellman uses "safe" primes: DH_check() return code renamed to
   7972      (Check if this is true? OpenPGP calls them "strong".)
   7973      [Ulf Mller]
   7975   *) Merge the functionality of "dh" and "gendh" programs into a new program
   7976      "dhparam". The old programs are retained for now but will handle DH keys
   7977      (instead of parameters) in future.
   7978      [Steve Henson]
   7980   *) Make the ciphers, s_server and s_client programs check the return values
   7981      when a new cipher list is set.
   7982      [Steve Henson]
   7984   *) Enhance the SSL/TLS cipher mechanism to correctly handle the TLS 56bit
   7985      ciphers. Before when the 56bit ciphers were enabled the sorting was
   7986      wrong.
   7988      The syntax for the cipher sorting has been extended to support sorting by
   7989      cipher-strength (using the strength_bits hard coded in the tables).
   7990      The new command is "@STRENGTH" (see also doc/apps/ciphers.pod).
   7992      Fix a bug in the cipher-command parser: when supplying a cipher command
   7993      string with an "undefined" symbol (neither command nor alphanumeric
   7994      [A-Za-z0-9], ssl_set_cipher_list used to hang in an endless loop. Now
   7995      an error is flagged.
   7997      Due to the strength-sorting extension, the code of the
   7998      ssl_create_cipher_list() function was completely rearranged. I hope that
   7999      the readability was also increased :-)
   8000      [Lutz Jaenicke <Lutz.Jaenicke (a] aet.TU-Cottbus.DE>]
   8002   *) Minor change to 'x509' utility. The -CAcreateserial option now uses 1
   8003      for the first serial number and places 2 in the serial number file. This
   8004      avoids problems when the root CA is created with serial number zero and
   8005      the first user certificate has the same issuer name and serial number
   8006      as the root CA.
   8007      [Steve Henson]
   8009   *) Fixes to X509_ATTRIBUTE utilities, change the 'req' program so it uses
   8010      the new code. Add documentation for this stuff.
   8011      [Steve Henson]
   8013   *) Changes to X509_ATTRIBUTE utilities. These have been renamed from
   8014      X509_*() to X509at_*() on the grounds that they don't handle X509
   8015      structures and behave in an analagous way to the X509v3 functions:
   8016      they shouldn't be called directly but wrapper functions should be used
   8017      instead.
   8019      So we also now have some wrapper functions that call the X509at functions
   8020      when passed certificate requests. (TO DO: similar things can be done with
   8021      PKCS#7 signed and unsigned attributes, PKCS#12 attributes and a few other
   8022      things. Some of these need some d2i or i2d and print functionality
   8023      because they handle more complex structures.)
   8024      [Steve Henson]
   8026   *) Add missing #ifndefs that caused missing symbols when building libssl
   8027      as a shared library without RSA.  Use #ifndef NO_SSL2 instead of
   8028      NO_RSA in ssl/s2*.c. 
   8029      [Kris Kennaway <kris (a] hub.freebsd.org>, modified by Ulf Mller]
   8031   *) Precautions against using the PRNG uninitialized: RAND_bytes() now
   8032      has a return value which indicates the quality of the random data
   8033      (1 = ok, 0 = not seeded).  Also an error is recorded on the thread's
   8034      error queue. New function RAND_pseudo_bytes() generates output that is
   8035      guaranteed to be unique but not unpredictable. RAND_add is like
   8036      RAND_seed, but takes an extra argument for an entropy estimate
   8037      (RAND_seed always assumes full entropy).
   8038      [Ulf Mller]
   8040   *) Do more iterations of Rabin-Miller probable prime test (specifically,
   8041      3 for 1024-bit primes, 6 for 512-bit primes, 12 for 256-bit primes
   8042      instead of only 2 for all lengths; see BN_prime_checks_for_size definition
   8043      in crypto/bn/bn_prime.c for the complete table).  This guarantees a
   8044      false-positive rate of at most 2^-80 for random input.
   8045      [Bodo Moeller]
   8047   *) Rewrite ssl3_read_n (ssl/s3_pkt.c) avoiding a couple of bugs.
   8048      [Bodo Moeller]
   8050   *) New function X509_CTX_rget_chain() (renamed to X509_CTX_get1_chain
   8051      in the 0.9.5 release), this returns the chain
   8052      from an X509_CTX structure with a dup of the stack and all
   8053      the X509 reference counts upped: so the stack will exist
   8054      after X509_CTX_cleanup() has been called. Modify pkcs12.c
   8055      to use this.
   8057      Also make SSL_SESSION_print() print out the verify return
   8058      code.
   8059      [Steve Henson]
   8061   *) Add manpage for the pkcs12 command. Also change the default
   8062      behaviour so MAC iteration counts are used unless the new
   8063      -nomaciter option is used. This improves file security and
   8064      only older versions of MSIE (4.0 for example) need it.
   8065      [Steve Henson]
   8067   *) Honor the no-xxx Configure options when creating .DEF files.
   8068      [Ulf Mller]
   8070   *) Add PKCS#10 attributes to field table: challengePassword, 
   8071      unstructuredName and unstructuredAddress. These are taken from
   8072      draft PKCS#9 v2.0 but are compatible with v1.2 provided no 
   8073      international characters are used.
   8075      More changes to X509_ATTRIBUTE code: allow the setting of types
   8076      based on strings. Remove the 'loc' parameter when adding
   8077      attributes because these will be a SET OF encoding which is sorted
   8078      in ASN1 order.
   8079      [Steve Henson]
   8081   *) Initial changes to the 'req' utility to allow request generation
   8082      automation. This will allow an application to just generate a template
   8083      file containing all the field values and have req construct the
   8084      request.
   8086      Initial support for X509_ATTRIBUTE handling. Stacks of these are
   8087      used all over the place including certificate requests and PKCS#7
   8088      structures. They are currently handled manually where necessary with
   8089      some primitive wrappers for PKCS#7. The new functions behave in a
   8090      manner analogous to the X509 extension functions: they allow
   8091      attributes to be looked up by NID and added.
   8093      Later something similar to the X509V3 code would be desirable to
   8094      automatically handle the encoding, decoding and printing of the
   8095      more complex types. The string types like challengePassword can
   8096      be handled by the string table functions.
   8098      Also modified the multi byte string table handling. Now there is
   8099      a 'global mask' which masks out certain types. The table itself
   8100      can use the flag STABLE_NO_MASK to ignore the mask setting: this
   8101      is useful when for example there is only one permissible type
   8102      (as in countryName) and using the mask might result in no valid
   8103      types at all.
   8104      [Steve Henson]
   8106   *) Clean up 'Finished' handling, and add functions SSL_get_finished and
   8107      SSL_get_peer_finished to allow applications to obtain the latest
   8108      Finished messages sent to the peer or expected from the peer,
   8109      respectively.  (SSL_get_peer_finished is usually the Finished message
   8110      actually received from the peer, otherwise the protocol will be aborted.)
   8112      As the Finished message are message digests of the complete handshake
   8113      (with a total of 192 bits for TLS 1.0 and more for SSL 3.0), they can
   8114      be used for external authentication procedures when the authentication
   8115      provided by SSL/TLS is not desired or is not enough.
   8116      [Bodo Moeller]
   8118   *) Enhanced support for Alpha Linux is added. Now ./config checks if
   8119      the host supports BWX extension and if Compaq C is present on the
   8120      $PATH. Just exploiting of the BWX extension results in 20-30%
   8121      performance kick for some algorithms, e.g. DES and RC4 to mention
   8122      a couple. Compaq C in turn generates ~20% faster code for MD5 and
   8123      SHA1.
   8124      [Andy Polyakov]
   8126   *) Add support for MS "fast SGC". This is arguably a violation of the
   8127      SSL3/TLS protocol. Netscape SGC does two handshakes: the first with
   8128      weak crypto and after checking the certificate is SGC a second one
   8129      with strong crypto. MS SGC stops the first handshake after receiving
   8130      the server certificate message and sends a second client hello. Since
   8131      a server will typically do all the time consuming operations before
   8132      expecting any further messages from the client (server key exchange
   8133      is the most expensive) there is little difference between the two.
   8135      To get OpenSSL to support MS SGC we have to permit a second client
   8136      hello message after we have sent server done. In addition we have to
   8137      reset the MAC if we do get this second client hello.
   8138      [Steve Henson]
   8140   *) Add a function 'd2i_AutoPrivateKey()' this will automatically decide
   8141      if a DER encoded private key is RSA or DSA traditional format. Changed
   8142      d2i_PrivateKey_bio() to use it. This is only needed for the "traditional"
   8143      format DER encoded private key. Newer code should use PKCS#8 format which
   8144      has the key type encoded in the ASN1 structure. Added DER private key
   8145      support to pkcs8 application.
   8146      [Steve Henson]
   8148   *) SSL 3/TLS 1 servers now don't request certificates when an anonymous
   8149      ciphersuites has been selected (as required by the SSL 3/TLS 1
   8150      specifications).  Exception: When SSL_VERIFY_FAIL_IF_NO_PEER_CERT
   8151      is set, we interpret this as a request to violate the specification
   8152      (the worst that can happen is a handshake failure, and 'correct'
   8153      behaviour would result in a handshake failure anyway).
   8154      [Bodo Moeller]
   8156   *) In SSL_CTX_add_session, take into account that there might be multiple
   8157      SSL_SESSION structures with the same session ID (e.g. when two threads
   8158      concurrently obtain them from an external cache).
   8159      The internal cache can handle only one SSL_SESSION with a given ID,
   8160      so if there's a conflict, we now throw out the old one to achieve
   8161      consistency.
   8162      [Bodo Moeller]
   8164   *) Add OIDs for idea and blowfish in CBC mode. This will allow both
   8165      to be used in PKCS#5 v2.0 and S/MIME.  Also add checking to
   8166      some routines that use cipher OIDs: some ciphers do not have OIDs
   8167      defined and so they cannot be used for S/MIME and PKCS#5 v2.0 for
   8168      example.
   8169      [Steve Henson]
   8171   *) Simplify the trust setting structure and code. Now we just have
   8172      two sequences of OIDs for trusted and rejected settings. These will
   8173      typically have values the same as the extended key usage extension
   8174      and any application specific purposes.
   8176      The trust checking code now has a default behaviour: it will just
   8177      check for an object with the same NID as the passed id. Functions can
   8178      be provided to override either the default behaviour or the behaviour
   8179      for a given id. SSL client, server and email already have functions
   8180      in place for compatibility: they check the NID and also return "trusted"
   8181      if the certificate is self signed.
   8182      [Steve Henson]
   8184   *) Add d2i,i2d bio/fp functions for PrivateKey: these convert the
   8185      traditional format into an EVP_PKEY structure.
   8186      [Steve Henson]
   8188   *) Add a password callback function PEM_cb() which either prompts for
   8189      a password if usr_data is NULL or otherwise assumes it is a null
   8190      terminated password. Allow passwords to be passed on command line
   8191      environment or config files in a few more utilities.
   8192      [Steve Henson]
   8194   *) Add a bunch of DER and PEM functions to handle PKCS#8 format private
   8195      keys. Add some short names for PKCS#8 PBE algorithms and allow them
   8196      to be specified on the command line for the pkcs8 and pkcs12 utilities.
   8197      Update documentation.
   8198      [Steve Henson]
   8200   *) Support for ASN1 "NULL" type. This could be handled before by using
   8201      ASN1_TYPE but there wasn't any function that would try to read a NULL
   8202      and produce an error if it couldn't. For compatibility we also have
   8203      ASN1_NULL_new() and ASN1_NULL_free() functions but these are faked and
   8204      don't allocate anything because they don't need to.
   8205      [Steve Henson]
   8207   *) Initial support for MacOS is now provided. Examine INSTALL.MacOS
   8208      for details.
   8209      [Andy Polyakov, Roy Woods <roy (a] centicsystems.ca>]
   8211   *) Rebuild of the memory allocation routines used by OpenSSL code and
   8212      possibly others as well.  The purpose is to make an interface that
   8213      provide hooks so anyone can build a separate set of allocation and
   8214      deallocation routines to be used by OpenSSL, for example memory
   8215      pool implementations, or something else, which was previously hard
   8216      since Malloc(), Realloc() and Free() were defined as macros having
   8217      the values malloc, realloc and free, respectively (except for Win32
   8218      compilations).  The same is provided for memory debugging code.
   8219      OpenSSL already comes with functionality to find memory leaks, but
   8220      this gives people a chance to debug other memory problems.
   8222      With these changes, a new set of functions and macros have appeared:
   8224        CRYPTO_set_mem_debug_functions()	        [F]
   8225        CRYPTO_get_mem_debug_functions()         [F]
   8226        CRYPTO_dbg_set_options()	                [F]
   8227        CRYPTO_dbg_get_options()                 [F]
   8228        CRYPTO_malloc_debug_init()               [M]
   8230      The memory debug functions are NULL by default, unless the library
   8231      is compiled with CRYPTO_MDEBUG or friends is defined.  If someone
   8232      wants to debug memory anyway, CRYPTO_malloc_debug_init() (which
   8233      gives the standard debugging functions that come with OpenSSL) or
   8234      CRYPTO_set_mem_debug_functions() (tells OpenSSL to use functions
   8235      provided by the library user) must be used.  When the standard
   8236      debugging functions are used, CRYPTO_dbg_set_options can be used to
   8237      request additional information:
   8238      CRYPTO_dbg_set_options(V_CYRPTO_MDEBUG_xxx) corresponds to setting
   8239      the CRYPTO_MDEBUG_xxx macro when compiling the library.   
   8241      Also, things like CRYPTO_set_mem_functions will always give the
   8242      expected result (the new set of functions is used for allocation
   8243      and deallocation) at all times, regardless of platform and compiler
   8244      options.
   8246      To finish it up, some functions that were never use in any other
   8247      way than through macros have a new API and new semantic:
   8249        CRYPTO_dbg_malloc()
   8250        CRYPTO_dbg_realloc()
   8251        CRYPTO_dbg_free()
   8253      All macros of value have retained their old syntax.
   8254      [Richard Levitte and Bodo Moeller]
   8256   *) Some S/MIME fixes. The OID for SMIMECapabilities was wrong, the
   8257      ordering of SMIMECapabilities wasn't in "strength order" and there
   8258      was a missing NULL in the AlgorithmIdentifier for the SHA1 signature
   8259      algorithm.
   8260      [Steve Henson]
   8262   *) Some ASN1 types with illegal zero length encoding (INTEGER,
   8263      ENUMERATED and OBJECT IDENTIFIER) choked the ASN1 routines.
   8264      [Frans Heymans <fheymans (a] isaserver.be>, modified by Steve Henson]
   8266   *) Merge in my S/MIME library for OpenSSL. This provides a simple
   8267      S/MIME API on top of the PKCS#7 code, a MIME parser (with enough
   8268      functionality to handle multipart/signed properly) and a utility
   8269      called 'smime' to call all this stuff. This is based on code I
   8270      originally wrote for Celo who have kindly allowed it to be
   8271      included in OpenSSL.
   8272      [Steve Henson]
   8274   *) Add variants des_set_key_checked and des_set_key_unchecked of
   8275      des_set_key (aka des_key_sched).  Global variable des_check_key
   8276      decides which of these is called by des_set_key; this way
   8277      des_check_key behaves as it always did, but applications and
   8278      the library itself, which was buggy for des_check_key == 1,
   8279      have a cleaner way to pick the version they need.
   8280      [Bodo Moeller]
   8282   *) New function PKCS12_newpass() which changes the password of a
   8283      PKCS12 structure.
   8284      [Steve Henson]
   8286   *) Modify X509_TRUST and X509_PURPOSE so it also uses a static and
   8287      dynamic mix. In both cases the ids can be used as an index into the
   8288      table. Also modified the X509_TRUST_add() and X509_PURPOSE_add()
   8289      functions so they accept a list of the field values and the
   8290      application doesn't need to directly manipulate the X509_TRUST
   8291      structure.
   8292      [Steve Henson]
   8294   *) Modify the ASN1_STRING_TABLE stuff so it also uses bsearch and doesn't
   8295      need initialising.
   8296      [Steve Henson]
   8298   *) Modify the way the V3 extension code looks up extensions. This now
   8299      works in a similar way to the object code: we have some "standard"
   8300      extensions in a static table which is searched with OBJ_bsearch()
   8301      and the application can add dynamic ones if needed. The file
   8302      crypto/x509v3/ext_dat.h now has the info: this file needs to be
   8303      updated whenever a new extension is added to the core code and kept
   8304      in ext_nid order. There is a simple program 'tabtest.c' which checks
   8305      this. New extensions are not added too often so this file can readily
   8306      be maintained manually.
   8308      There are two big advantages in doing things this way. The extensions
   8309      can be looked up immediately and no longer need to be "added" using
   8310      X509V3_add_standard_extensions(): this function now does nothing.
   8311      [Side note: I get *lots* of email saying the extension code doesn't
   8312       work because people forget to call this function]
   8313      Also no dynamic allocation is done unless new extensions are added:
   8314      so if we don't add custom extensions there is no need to call
   8315      X509V3_EXT_cleanup().
   8316      [Steve Henson]
   8318   *) Modify enc utility's salting as follows: make salting the default. Add a
   8319      magic header, so unsalted files fail gracefully instead of just decrypting
   8320      to garbage. This is because not salting is a big security hole, so people
   8321      should be discouraged from doing it.
   8322      [Ben Laurie]
   8324   *) Fixes and enhancements to the 'x509' utility. It allowed a message
   8325      digest to be passed on the command line but it only used this
   8326      parameter when signing a certificate. Modified so all relevant
   8327      operations are affected by the digest parameter including the
   8328      -fingerprint and -x509toreq options. Also -x509toreq choked if a
   8329      DSA key was used because it didn't fix the digest.
   8330      [Steve Henson]
   8332   *) Initial certificate chain verify code. Currently tests the untrusted
   8333      certificates for consistency with the verify purpose (which is set
   8334      when the X509_STORE_CTX structure is set up) and checks the pathlength.
   8336      There is a NO_CHAIN_VERIFY compilation option to keep the old behaviour:
   8337      this is because it will reject chains with invalid extensions whereas
   8338      every previous version of OpenSSL and SSLeay made no checks at all.
   8340      Trust code: checks the root CA for the relevant trust settings. Trust
   8341      settings have an initial value consistent with the verify purpose: e.g.
   8342      if the verify purpose is for SSL client use it expects the CA to be
   8343      trusted for SSL client use. However the default value can be changed to
   8344      permit custom trust settings: one example of this would be to only trust
   8345      certificates from a specific "secure" set of CAs.
   8347      Also added X509_STORE_CTX_new() and X509_STORE_CTX_free() functions
   8348      which should be used for version portability: especially since the
   8349      verify structure is likely to change more often now.
   8351      SSL integration. Add purpose and trust to SSL_CTX and SSL and functions
   8352      to set them. If not set then assume SSL clients will verify SSL servers
   8353      and vice versa.
   8355      Two new options to the verify program: -untrusted allows a set of
   8356      untrusted certificates to be passed in and -purpose which sets the
   8357      intended purpose of the certificate. If a purpose is set then the
   8358      new chain verify code is used to check extension consistency.
   8359      [Steve Henson]
   8361   *) Support for the authority information access extension.
   8362      [Steve Henson]
   8364   *) Modify RSA and DSA PEM read routines to transparently handle
   8365      PKCS#8 format private keys. New *_PUBKEY_* functions that handle
   8366      public keys in a format compatible with certificate
   8367      SubjectPublicKeyInfo structures. Unfortunately there were already
   8368      functions called *_PublicKey_* which used various odd formats so
   8369      these are retained for compatibility: however the DSA variants were
   8370      never in a public release so they have been deleted. Changed dsa/rsa
   8371      utilities to handle the new format: note no releases ever handled public
   8372      keys so we should be OK.
   8374      The primary motivation for this change is to avoid the same fiasco
   8375      that dogs private keys: there are several incompatible private key
   8376      formats some of which are standard and some OpenSSL specific and
   8377      require various evil hacks to allow partial transparent handling and
   8378      even then it doesn't work with DER formats. Given the option anything
   8379      other than PKCS#8 should be dumped: but the other formats have to
   8380      stay in the name of compatibility.
   8382      With public keys and the benefit of hindsight one standard format 
   8383      is used which works with EVP_PKEY, RSA or DSA structures: though
   8384      it clearly returns an error if you try to read the wrong kind of key.
   8386      Added a -pubkey option to the 'x509' utility to output the public key.
   8387      Also rename the EVP_PKEY_get_*() to EVP_PKEY_rget_*()
   8388      (renamed to EVP_PKEY_get1_*() in the OpenSSL 0.9.5 release) and add
   8389      EVP_PKEY_rset_*() functions (renamed to EVP_PKEY_set1_*())
   8390      that do the same as the EVP_PKEY_assign_*() except they up the
   8391      reference count of the added key (they don't "swallow" the
   8392      supplied key).
   8393      [Steve Henson]
   8395   *) Fixes to crypto/x509/by_file.c the code to read in certificates and
   8396      CRLs would fail if the file contained no certificates or no CRLs:
   8397      added a new function to read in both types and return the number
   8398      read: this means that if none are read it will be an error. The
   8399      DER versions of the certificate and CRL reader would always fail
   8400      because it isn't possible to mix certificates and CRLs in DER format
   8401      without choking one or the other routine. Changed this to just read
   8402      a certificate: this is the best we can do. Also modified the code
   8403      in apps/verify.c to take notice of return codes: it was previously
   8404      attempting to read in certificates from NULL pointers and ignoring
   8405      any errors: this is one reason why the cert and CRL reader seemed
   8406      to work. It doesn't check return codes from the default certificate
   8407      routines: these may well fail if the certificates aren't installed.
   8408      [Steve Henson]
   8410   *) Code to support otherName option in GeneralName.
   8411      [Steve Henson]
   8413   *) First update to verify code. Change the verify utility
   8414      so it warns if it is passed a self signed certificate:
   8415      for consistency with the normal behaviour. X509_verify
   8416      has been modified to it will now verify a self signed
   8417      certificate if *exactly* the same certificate appears
   8418      in the store: it was previously impossible to trust a
   8419      single self signed certificate. This means that:
   8420      openssl verify ss.pem
   8421      now gives a warning about a self signed certificate but
   8422      openssl verify -CAfile ss.pem ss.pem
   8423      is OK.
   8424      [Steve Henson]
   8426   *) For servers, store verify_result in SSL_SESSION data structure
   8427      (and add it to external session representation).
   8428      This is needed when client certificate verifications fails,
   8429      but an application-provided verification callback (set by
   8430      SSL_CTX_set_cert_verify_callback) allows accepting the session
   8431      anyway (i.e. leaves x509_store_ctx->error != X509_V_OK
   8432      but returns 1): When the session is reused, we have to set
   8433      ssl->verify_result to the appropriate error code to avoid
   8434      security holes.
   8435      [Bodo Moeller, problem pointed out by Lutz Jaenicke]
   8437   *) Fix a bug in the new PKCS#7 code: it didn't consider the
   8438      case in PKCS7_dataInit() where the signed PKCS7 structure
   8439      didn't contain any existing data because it was being created.
   8440      [Po-Cheng Chen <pocheng (a] nst.com.tw>, slightly modified by Steve Henson]
   8442   *) Add a salt to the key derivation routines in enc.c. This
   8443      forms the first 8 bytes of the encrypted file. Also add a
   8444      -S option to allow a salt to be input on the command line.
   8445      [Steve Henson]
   8447   *) New function X509_cmp(). Oddly enough there wasn't a function
   8448      to compare two certificates. We do this by working out the SHA1
   8449      hash and comparing that. X509_cmp() will be needed by the trust
   8450      code.
   8451      [Steve Henson]
   8453   *) SSL_get1_session() is like SSL_get_session(), but increments
   8454      the reference count in the SSL_SESSION returned.
   8455      [Geoff Thorpe <geoff (a] eu.c2.net>]
   8457   *) Fix for 'req': it was adding a null to request attributes.
   8458      Also change the X509_LOOKUP and X509_INFO code to handle
   8459      certificate auxiliary information.
   8460      [Steve Henson]
   8462   *) Add support for 40 and 64 bit RC2 and RC4 algorithms: document
   8463      the 'enc' command.
   8464      [Steve Henson]
   8466   *) Add the possibility to add extra information to the memory leak
   8467      detecting output, to form tracebacks, showing from where each
   8468      allocation was originated: CRYPTO_push_info("constant string") adds
   8469      the string plus current file name and line number to a per-thread
   8470      stack, CRYPTO_pop_info() does the obvious, CRYPTO_remove_all_info()
   8471      is like calling CYRPTO_pop_info() until the stack is empty.
   8472      Also updated memory leak detection code to be multi-thread-safe.
   8473      [Richard Levitte]
   8475   *) Add options -text and -noout to pkcs7 utility and delete the
   8476      encryption options which never did anything. Update docs.
   8477      [Steve Henson]
   8479   *) Add options to some of the utilities to allow the pass phrase
   8480      to be included on either the command line (not recommended on
   8481      OSes like Unix) or read from the environment. Update the
   8482      manpages and fix a few bugs.
   8483      [Steve Henson]
   8485   *) Add a few manpages for some of the openssl commands.
   8486      [Steve Henson]
   8488   *) Fix the -revoke option in ca. It was freeing up memory twice,
   8489      leaking and not finding already revoked certificates.
   8490      [Steve Henson]
   8492   *) Extensive changes to support certificate auxiliary information.
   8493      This involves the use of X509_CERT_AUX structure and X509_AUX
   8494      functions. An X509_AUX function such as PEM_read_X509_AUX()
   8495      can still read in a certificate file in the usual way but it
   8496      will also read in any additional "auxiliary information". By
   8497      doing things this way a fair degree of compatibility can be
   8498      retained: existing certificates can have this information added
   8499      using the new 'x509' options. 
   8501      Current auxiliary information includes an "alias" and some trust
   8502      settings. The trust settings will ultimately be used in enhanced
   8503      certificate chain verification routines: currently a certificate
   8504      can only be trusted if it is self signed and then it is trusted
   8505      for all purposes.
   8506      [Steve Henson]
   8508   *) Fix assembler for Alpha (tested only on DEC OSF not Linux or *BSD).
   8509      The problem was that one of the replacement routines had not been working
   8510      since SSLeay releases.  For now the offending routine has been replaced
   8511      with non-optimised assembler.  Even so, this now gives around 95%
   8512      performance improvement for 1024 bit RSA signs.
   8513      [Mark Cox]
   8515   *) Hack to fix PKCS#7 decryption when used with some unorthodox RC2 
   8516      handling. Most clients have the effective key size in bits equal to
   8517      the key length in bits: so a 40 bit RC2 key uses a 40 bit (5 byte) key.
   8518      A few however don't do this and instead use the size of the decrypted key
   8519      to determine the RC2 key length and the AlgorithmIdentifier to determine
   8520      the effective key length. In this case the effective key length can still
   8521      be 40 bits but the key length can be 168 bits for example. This is fixed
   8522      by manually forcing an RC2 key into the EVP_PKEY structure because the
   8523      EVP code can't currently handle unusual RC2 key sizes: it always assumes
   8524      the key length and effective key length are equal.
   8525      [Steve Henson]
   8527   *) Add a bunch of functions that should simplify the creation of 
   8528      X509_NAME structures. Now you should be able to do:
   8529      X509_NAME_add_entry_by_txt(nm, "CN", MBSTRING_ASC, "Steve", -1, -1, 0);
   8530      and have it automatically work out the correct field type and fill in
   8531      the structures. The more adventurous can try:
   8532      X509_NAME_add_entry_by_txt(nm, field, MBSTRING_UTF8, str, -1, -1, 0);
   8533      and it will (hopefully) work out the correct multibyte encoding.
   8534      [Steve Henson]
   8536   *) Change the 'req' utility to use the new field handling and multibyte
   8537      copy routines. Before the DN field creation was handled in an ad hoc
   8538      way in req, ca, and x509 which was rather broken and didn't support
   8539      BMPStrings or UTF8Strings. Since some software doesn't implement
   8540      BMPStrings or UTF8Strings yet, they can be enabled using the config file
   8541      using the dirstring_type option. See the new comment in the default
   8542      openssl.cnf for more info.
   8543      [Steve Henson]
   8545   *) Make crypto/rand/md_rand.c more robust:
   8546      - Assure unique random numbers after fork().
   8547      - Make sure that concurrent threads access the global counter and
   8548        md serializably so that we never lose entropy in them
   8549        or use exactly the same state in multiple threads.
   8550        Access to the large state is not always serializable because
   8551        the additional locking could be a performance killer, and
   8552        md should be large enough anyway.
   8553      [Bodo Moeller]
   8555   *) New file apps/app_rand.c with commonly needed functionality
   8556      for handling the random seed file.
   8558      Use the random seed file in some applications that previously did not:
   8559           ca,
   8560           dsaparam -genkey (which also ignored its '-rand' option), 
   8561           s_client,
   8562           s_server,
   8563           x509 (when signing).
   8564      Except on systems with /dev/urandom, it is crucial to have a random
   8565      seed file at least for key creation, DSA signing, and for DH exchanges;
   8566      for RSA signatures we could do without one.
   8568      gendh and gendsa (unlike genrsa) used to read only the first byte
   8569      of each file listed in the '-rand' option.  The function as previously
   8570      found in genrsa is now in app_rand.c and is used by all programs
   8571      that support '-rand'.
   8572      [Bodo Moeller]
   8574   *) In RAND_write_file, use mode 0600 for creating files;
   8575      don't just chmod when it may be too late.
   8576      [Bodo Moeller]
   8578   *) Report an error from X509_STORE_load_locations
   8579      when X509_LOOKUP_load_file or X509_LOOKUP_add_dir failed.
   8580      [Bill Perry]
   8582   *) New function ASN1_mbstring_copy() this copies a string in either
   8583      ASCII, Unicode, Universal (4 bytes per character) or UTF8 format
   8584      into an ASN1_STRING type. A mask of permissible types is passed
   8585      and it chooses the "minimal" type to use or an error if not type
   8586      is suitable.
   8587      [Steve Henson]
   8589   *) Add function equivalents to the various macros in asn1.h. The old
   8590      macros are retained with an M_ prefix. Code inside the library can
   8591      use the M_ macros. External code (including the openssl utility)
   8592      should *NOT* in order to be "shared library friendly".
   8593      [Steve Henson]
   8595   *) Add various functions that can check a certificate's extensions
   8596      to see if it usable for various purposes such as SSL client,
   8597      server or S/MIME and CAs of these types. This is currently 
   8598      VERY EXPERIMENTAL but will ultimately be used for certificate chain
   8599      verification. Also added a -purpose flag to x509 utility to
   8600      print out all the purposes.
   8601      [Steve Henson]
   8603   *) Add a CRYPTO_EX_DATA to X509 certificate structure and associated
   8604      functions.
   8605      [Steve Henson]
   8607   *) New X509V3_{X509,CRL,REVOKED}_get_d2i() functions. These will search
   8608      for, obtain and decode and extension and obtain its critical flag.
   8609      This allows all the necessary extension code to be handled in a
   8610      single function call.
   8611      [Steve Henson]
   8613   *) RC4 tune-up featuring 30-40% performance improvement on most RISC
   8614      platforms. See crypto/rc4/rc4_enc.c for further details.
   8615      [Andy Polyakov]
   8617   *) New -noout option to asn1parse. This causes no output to be produced
   8618      its main use is when combined with -strparse and -out to extract data
   8619      from a file (which may not be in ASN.1 format).
   8620      [Steve Henson]
   8622   *) Fix for pkcs12 program. It was hashing an invalid certificate pointer
   8623      when producing the local key id.
   8624      [Richard Levitte <levitte (a] stacken.kth.se>]
   8626   *) New option -dhparam in s_server. This allows a DH parameter file to be
   8627      stated explicitly. If it is not stated then it tries the first server
   8628      certificate file. The previous behaviour hard coded the filename
   8629      "server.pem".
   8630      [Steve Henson]
   8632   *) Add -pubin and -pubout options to the rsa and dsa commands. These allow
   8633      a public key to be input or output. For example:
   8634      openssl rsa -in key.pem -pubout -out pubkey.pem
   8635      Also added necessary DSA public key functions to handle this.
   8636      [Steve Henson]
   8638   *) Fix so PKCS7_dataVerify() doesn't crash if no certificates are contained
   8639      in the message. This was handled by allowing
   8640      X509_find_by_issuer_and_serial() to tolerate a NULL passed to it.
   8641      [Steve Henson, reported by Sampo Kellomaki <sampo (a] mail.neuronio.pt>]
   8643   *) Fix for bug in d2i_ASN1_bytes(): other ASN1 functions add an extra null
   8644      to the end of the strings whereas this didn't. This would cause problems
   8645      if strings read with d2i_ASN1_bytes() were later modified.
   8646      [Steve Henson, reported by Arne Ansper <arne (a] ats.cyber.ee>]
   8648   *) Fix for base64 decode bug. When a base64 bio reads only one line of
   8649      data and it contains EOF it will end up returning an error. This is
   8650      caused by input 46 bytes long. The cause is due to the way base64
   8651      BIOs find the start of base64 encoded data. They do this by trying a
   8652      trial decode on each line until they find one that works. When they
   8653      do a flag is set and it starts again knowing it can pass all the
   8654      data directly through the decoder. Unfortunately it doesn't reset
   8655      the context it uses. This means that if EOF is reached an attempt
   8656      is made to pass two EOFs through the context and this causes the
   8657      resulting error. This can also cause other problems as well. As is
   8658      usual with these problems it takes *ages* to find and the fix is
   8659      trivial: move one line.
   8660      [Steve Henson, reported by ian (a] uns.ns.ac.yu (Ivan Nejgebauer) ]
   8662   *) Ugly workaround to get s_client and s_server working under Windows. The
   8663      old code wouldn't work because it needed to select() on sockets and the
   8664      tty (for keypresses and to see if data could be written). Win32 only
   8665      supports select() on sockets so we select() with a 1s timeout on the
   8666      sockets and then see if any characters are waiting to be read, if none
   8667      are present then we retry, we also assume we can always write data to
   8668      the tty. This isn't nice because the code then blocks until we've
   8669      received a complete line of data and it is effectively polling the
   8670      keyboard at 1s intervals: however it's quite a bit better than not
   8671      working at all :-) A dedicated Windows application might handle this
   8672      with an event loop for example.
   8673      [Steve Henson]
   8675   *) Enhance RSA_METHOD structure. Now there are two extra methods, rsa_sign
   8676      and rsa_verify. When the RSA_FLAGS_SIGN_VER option is set these functions
   8677      will be called when RSA_sign() and RSA_verify() are used. This is useful
   8678      if rsa_pub_dec() and rsa_priv_enc() equivalents are not available.
   8679      For this to work properly RSA_public_decrypt() and RSA_private_encrypt()
   8680      should *not* be used: RSA_sign() and RSA_verify() must be used instead.
   8681      This necessitated the support of an extra signature type NID_md5_sha1
   8682      for SSL signatures and modifications to the SSL library to use it instead
   8683      of calling RSA_public_decrypt() and RSA_private_encrypt().
   8684      [Steve Henson]
   8686   *) Add new -verify -CAfile and -CApath options to the crl program, these
   8687      will lookup a CRL issuers certificate and verify the signature in a
   8688      similar way to the verify program. Tidy up the crl program so it
   8689      no longer accesses structures directly. Make the ASN1 CRL parsing a bit
   8690      less strict. It will now permit CRL extensions even if it is not
   8691      a V2 CRL: this will allow it to tolerate some broken CRLs.
   8692      [Steve Henson]
   8694   *) Initialize all non-automatic variables each time one of the openssl
   8695      sub-programs is started (this is necessary as they may be started
   8696      multiple times from the "OpenSSL>" prompt).
   8697      [Lennart Bang, Bodo Moeller]
   8699   *) Preliminary compilation option RSA_NULL which disables RSA crypto without
   8700      removing all other RSA functionality (this is what NO_RSA does). This
   8701      is so (for example) those in the US can disable those operations covered
   8702      by the RSA patent while allowing storage and parsing of RSA keys and RSA
   8703      key generation.
   8704      [Steve Henson]
   8706   *) Non-copying interface to BIO pairs.
   8707      (still largely untested)
   8708      [Bodo Moeller]
   8710   *) New function ANS1_tag2str() to convert an ASN1 tag to a descriptive
   8711      ASCII string. This was handled independently in various places before.
   8712      [Steve Henson]
   8714   *) New functions UTF8_getc() and UTF8_putc() that parse and generate
   8715      UTF8 strings a character at a time.
   8716      [Steve Henson]
   8718   *) Use client_version from client hello to select the protocol
   8719      (s23_srvr.c) and for RSA client key exchange verification
   8720      (s3_srvr.c), as required by the SSL 3.0/TLS 1.0 specifications.
   8721      [Bodo Moeller]
   8723   *) Add various utility functions to handle SPKACs, these were previously
   8724      handled by poking round in the structure internals. Added new function
   8725      NETSCAPE_SPKI_print() to print out SPKAC and a new utility 'spkac' to
   8726      print, verify and generate SPKACs. Based on an original idea from
   8727      Massimiliano Pala <madwolf (a] comune.modena.it> but extensively modified.
   8728      [Steve Henson]
   8730   *) RIPEMD160 is operational on all platforms and is back in 'make test'.
   8731      [Andy Polyakov]
   8733   *) Allow the config file extension section to be overwritten on the
   8734      command line. Based on an original idea from Massimiliano Pala
   8735      <madwolf (a] comune.modena.it>. The new option is called -extensions
   8736      and can be applied to ca, req and x509. Also -reqexts to override
   8737      the request extensions in req and -crlexts to override the crl extensions
   8738      in ca.
   8739      [Steve Henson]
   8741   *) Add new feature to the SPKAC handling in ca.  Now you can include
   8742      the same field multiple times by preceding it by "XXXX." for example:
   8743      1.OU="Unit name 1"
   8744      2.OU="Unit name 2"
   8745      this is the same syntax as used in the req config file.
   8746      [Steve Henson]
   8748   *) Allow certificate extensions to be added to certificate requests. These
   8749      are specified in a 'req_extensions' option of the req section of the
   8750      config file. They can be printed out with the -text option to req but
   8751      are otherwise ignored at present.
   8752      [Steve Henson]
   8754   *) Fix a horrible bug in enc_read() in crypto/evp/bio_enc.c: if the first
   8755      data read consists of only the final block it would not decrypted because
   8756      EVP_CipherUpdate() would correctly report zero bytes had been decrypted.
   8757      A misplaced 'break' also meant the decrypted final block might not be
   8758      copied until the next read.
   8759      [Steve Henson]
   8761   *) Initial support for DH_METHOD. Again based on RSA_METHOD. Also added
   8762      a few extra parameters to the DH structure: these will be useful if
   8763      for example we want the value of 'q' or implement X9.42 DH.
   8764      [Steve Henson]
   8766   *) Initial support for DSA_METHOD. This is based on the RSA_METHOD and
   8767      provides hooks that allow the default DSA functions or functions on a
   8768      "per key" basis to be replaced. This allows hardware acceleration and
   8769      hardware key storage to be handled without major modification to the
   8770      library. Also added low level modexp hooks and CRYPTO_EX structure and 
   8771      associated functions.
   8772      [Steve Henson]
   8774   *) Add a new flag to memory BIOs, BIO_FLAG_MEM_RDONLY. This marks the BIO
   8775      as "read only": it can't be written to and the buffer it points to will
   8776      not be freed. Reading from a read only BIO is much more efficient than
   8777      a normal memory BIO. This was added because there are several times when
   8778      an area of memory needs to be read from a BIO. The previous method was
   8779      to create a memory BIO and write the data to it, this results in two
   8780      copies of the data and an O(n^2) reading algorithm. There is a new
   8781      function BIO_new_mem_buf() which creates a read only memory BIO from
   8782      an area of memory. Also modified the PKCS#7 routines to use read only
   8783      memory BIOs.
   8784      [Steve Henson]
   8786   *) Bugfix: ssl23_get_client_hello did not work properly when called in
   8787      state SSL23_ST_SR_CLNT_HELLO_B, i.e. when the first 7 bytes of
   8788      a SSLv2-compatible client hello for SSLv3 or TLSv1 could be read,
   8789      but a retry condition occured while trying to read the rest.
   8790      [Bodo Moeller]
   8792   *) The PKCS7_ENC_CONTENT_new() function was setting the content type as
   8793      NID_pkcs7_encrypted by default: this was wrong since this should almost
   8794      always be NID_pkcs7_data. Also modified the PKCS7_set_type() to handle
   8795      the encrypted data type: this is a more sensible place to put it and it
   8796      allows the PKCS#12 code to be tidied up that duplicated this
   8797      functionality.
   8798      [Steve Henson]
   8800   *) Changed obj_dat.pl script so it takes its input and output files on
   8801      the command line. This should avoid shell escape redirection problems
   8802      under Win32.
   8803      [Steve Henson]
   8805   *) Initial support for certificate extension requests, these are included
   8806      in things like Xenroll certificate requests. Included functions to allow
   8807      extensions to be obtained and added.
   8808      [Steve Henson]
   8810   *) -crlf option to s_client and s_server for sending newlines as
   8811      CRLF (as required by many protocols).
   8812      [Bodo Moeller]
   8814  Changes between 0.9.3a and 0.9.4  [09 Aug 1999]
   8816   *) Install libRSAglue.a when OpenSSL is built with RSAref.
   8817      [Ralf S. Engelschall]
   8819   *) A few more ``#ifndef NO_FP_API / #endif'' pairs for consistency.
   8820      [Andrija Antonijevic <TheAntony2 (a] bigfoot.com>]
   8822   *) Fix -startdate and -enddate (which was missing) arguments to 'ca'
   8823      program.
   8824      [Steve Henson]
   8826   *) New function DSA_dup_DH, which duplicates DSA parameters/keys as
   8827      DH parameters/keys (q is lost during that conversion, but the resulting
   8828      DH parameters contain its length).
   8830      For 1024-bit p, DSA_generate_parameters followed by DSA_dup_DH is
   8831      much faster than DH_generate_parameters (which creates parameters
   8832      where p = 2*q + 1), and also the smaller q makes DH computations
   8833      much more efficient (160-bit exponentiation instead of 1024-bit
   8834      exponentiation); so this provides a convenient way to support DHE
   8835      ciphersuites in SSL/TLS servers (see ssl/ssltest.c).  It is of
   8836      utter importance to use
   8837          SSL_CTX_set_options(s_ctx, SSL_OP_SINGLE_DH_USE);
   8838      or
   8839          SSL_set_options(s_ctx, SSL_OP_SINGLE_DH_USE);
   8840      when such DH parameters are used, because otherwise small subgroup
   8841      attacks may become possible!
   8842      [Bodo Moeller]
   8844   *) Avoid memory leak in i2d_DHparams.
   8845      [Bodo Moeller]
   8847   *) Allow the -k option to be used more than once in the enc program:
   8848      this allows the same encrypted message to be read by multiple recipients.
   8849      [Steve Henson]