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      1 /*	$NetBSD: hx_locl.h,v 1.2 2017/01/28 21:31:48 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2004 - 2016 Kungliga Tekniska Hgskolan
      5  * (Royal Institute of Technology, Stockholm, Sweden).
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  *
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  *
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * 3. Neither the name of the Institute nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 /* Id */
     37 
     38 #include <config.h>
     39 
     40 #include <stdio.h>
     41 #include <stdlib.h>
     42 #include <ctype.h>
     43 #include <errno.h>
     44 #ifdef HAVE_STRINGS_H
     45 #include <strings.h>
     46 #endif
     47 #include <assert.h>
     48 #include <stdarg.h>
     49 #include <err.h>
     50 #include <limits.h>
     51 
     52 #include <krb5/roken.h>
     53 
     54 #include <krb5/getarg.h>
     55 #include <krb5/base64.h>
     56 #include <krb5/hex.h>
     57 #include <krb5/com_err.h>
     58 #include <krb5/parse_units.h>
     59 #include <krb5/parse_bytes.h>
     60 
     61 #include <krb5/krb5-types.h>
     62 
     63 #include <krb5/rfc2459_asn1.h>
     64 #include <krb5/cms_asn1.h>
     65 #include <krb5/pkcs8_asn1.h>
     66 #include <krb5/pkcs9_asn1.h>
     67 #include <krb5/pkcs12_asn1.h>
     68 #include <krb5/ocsp_asn1.h>
     69 #include <krb5/pkcs10_asn1.h>
     70 #include <krb5/asn1_err.h>
     71 #include <krb5/pkinit_asn1.h>
     72 
     73 #include <krb5/der.h>
     74 
     75 /*
     76  * We use OpenSSL for EC, but to do this we need to disable cross-references
     77  * between OpenSSL and hcrypto bn.h and such.  Source files that use OpenSSL EC
     78  * must define HEIM_NO_CRYPTO_HDRS before including this file.
     79  */
     80 
     81 #define HC_DEPRECATED_CRYPTO
     82 #ifndef HEIM_NO_CRYPTO_HDRS
     83 #include "crypto-headers.h"
     84 #endif
     85 
     86 struct hx509_keyset_ops;
     87 struct hx509_collector;
     88 struct hx509_generate_private_context;
     89 typedef struct hx509_path hx509_path;
     90 
     91 #include <krb5/heimbase.h>
     92 
     93 #include <krb5/hx509.h>
     94 
     95 typedef void (*_hx509_cert_release_func)(struct hx509_cert_data *, void *);
     96 
     97 
     98 #include "sel.h"
     99 
    100 #include <hx509-private.h>
    101 #include <krb5/hx509_err.h>
    102 
    103 struct hx509_peer_info {
    104     hx509_cert cert;
    105     AlgorithmIdentifier *val;
    106     size_t len;
    107 };
    108 
    109 #define HX509_CERTS_FIND_SERIALNUMBER		1
    110 #define HX509_CERTS_FIND_ISSUER			2
    111 #define HX509_CERTS_FIND_SUBJECT		4
    112 #define HX509_CERTS_FIND_ISSUER_KEY_ID		8
    113 #define HX509_CERTS_FIND_SUBJECT_KEY_ID		16
    114 
    115 struct hx509_name_data {
    116     Name der_name;
    117 };
    118 
    119 struct hx509_path {
    120     size_t len;
    121     hx509_cert *val;
    122 };
    123 
    124 struct hx509_query_data {
    125     int match;
    126 #define HX509_QUERY_FIND_ISSUER_CERT		0x000001
    127 #define HX509_QUERY_MATCH_SERIALNUMBER		0x000002
    128 #define HX509_QUERY_MATCH_ISSUER_NAME		0x000004
    129 #define HX509_QUERY_MATCH_SUBJECT_NAME		0x000008
    130 #define HX509_QUERY_MATCH_SUBJECT_KEY_ID	0x000010
    131 #define HX509_QUERY_MATCH_ISSUER_ID		0x000020
    132 #define HX509_QUERY_PRIVATE_KEY			0x000040
    133 #define HX509_QUERY_KU_ENCIPHERMENT		0x000080
    134 #define HX509_QUERY_KU_DIGITALSIGNATURE		0x000100
    135 #define HX509_QUERY_KU_KEYCERTSIGN		0x000200
    136 #define HX509_QUERY_KU_CRLSIGN			0x000400
    137 #define HX509_QUERY_KU_NONREPUDIATION		0x000800
    138 #define HX509_QUERY_KU_KEYAGREEMENT		0x001000
    139 #define HX509_QUERY_KU_DATAENCIPHERMENT		0x002000
    140 #define HX509_QUERY_ANCHOR			0x004000
    141 #define HX509_QUERY_MATCH_CERTIFICATE		0x008000
    142 #define HX509_QUERY_MATCH_LOCAL_KEY_ID		0x010000
    143 #define HX509_QUERY_NO_MATCH_PATH		0x020000
    144 #define HX509_QUERY_MATCH_FRIENDLY_NAME		0x040000
    145 #define HX509_QUERY_MATCH_FUNCTION		0x080000
    146 #define HX509_QUERY_MATCH_KEY_HASH_SHA1		0x100000
    147 #define HX509_QUERY_MATCH_TIME			0x200000
    148 #define HX509_QUERY_MATCH_EKU			0x400000
    149 #define HX509_QUERY_MATCH_EXPR			0x800000
    150 #define HX509_QUERY_MASK			0xffffff
    151     Certificate *subject;
    152     Certificate *certificate;
    153     heim_integer *serial;
    154     heim_octet_string *subject_id;
    155     heim_octet_string *local_key_id;
    156     Name *issuer_name;
    157     Name *subject_name;
    158     hx509_path *path;
    159     char *friendlyname;
    160     int (*cmp_func)(hx509_context, hx509_cert, void *);
    161     void *cmp_func_ctx;
    162     heim_octet_string *keyhash_sha1;
    163     time_t timenow;
    164     heim_oid *eku;
    165     struct hx_expr *expr;
    166 };
    167 
    168 struct hx509_keyset_ops {
    169     const char *name;
    170     int flags;
    171     int (*init)(hx509_context, hx509_certs, void **,
    172 		int, const char *, hx509_lock);
    173     int (*store)(hx509_context, hx509_certs, void *, int, hx509_lock);
    174     int (*free)(hx509_certs, void *);
    175     int (*add)(hx509_context, hx509_certs, void *, hx509_cert);
    176     int (*query)(hx509_context, hx509_certs, void *,
    177 		 const hx509_query *, hx509_cert *);
    178     int (*iter_start)(hx509_context, hx509_certs, void *, void **);
    179     int (*iter)(hx509_context, hx509_certs, void *, void *, hx509_cert *);
    180     int (*iter_end)(hx509_context, hx509_certs, void *, void *);
    181     int (*printinfo)(hx509_context, hx509_certs,
    182 		     void *, int (*)(void *, const char *), void *);
    183     int (*getkeys)(hx509_context, hx509_certs, void *, hx509_private_key **);
    184     int (*addkey)(hx509_context, hx509_certs, void *, hx509_private_key);
    185 };
    186 
    187 struct _hx509_password {
    188     size_t len;
    189     char **val;
    190 };
    191 
    192 extern hx509_lock _hx509_empty_lock;
    193 
    194 struct hx509_context_data {
    195     struct hx509_keyset_ops **ks_ops;
    196     int ks_num_ops;
    197     int flags;
    198 #define HX509_CTX_VERIFY_MISSING_OK	1
    199     int ocsp_time_diff;
    200 #define HX509_DEFAULT_OCSP_TIME_DIFF	(5*60)
    201     heim_error_t error;
    202     struct et_list *et_list;
    203     char *querystat;
    204     hx509_certs default_trust_anchors;
    205 };
    206 
    207 /* _hx509_calculate_path flag field */
    208 #define HX509_CALCULATE_PATH_NO_ANCHOR 1
    209 
    210 /* environment */
    211 struct hx509_env_data {
    212     enum { env_string, env_list } type;
    213     char *name;
    214     struct hx509_env_data *next;
    215     union {
    216 	char *string;
    217 	struct hx509_env_data *list;
    218     } u;
    219 };
    220 
    221 
    222 extern const AlgorithmIdentifier * _hx509_crypto_default_sig_alg;
    223 extern const AlgorithmIdentifier * _hx509_crypto_default_digest_alg;
    224 extern const AlgorithmIdentifier * _hx509_crypto_default_secret_alg;
    225 
    226 /*
    227  * Private bits from crypto.c, so crypto-ec.c can also see them.
    228  *
    229  * This is part of the use-OpenSSL-for-EC hack.
    230  */
    231 
    232 struct hx509_crypto;
    233 
    234 struct signature_alg;
    235 
    236 struct hx509_generate_private_context {
    237     const heim_oid *key_oid;
    238     int isCA;
    239     unsigned long num_bits;
    240 };
    241 
    242 struct hx509_private_key_ops {
    243     const char *pemtype;
    244     const heim_oid *key_oid;
    245     int (*available)(const hx509_private_key,
    246 		     const AlgorithmIdentifier *);
    247     int (*get_spki)(hx509_context,
    248 		    const hx509_private_key,
    249 		    SubjectPublicKeyInfo *);
    250     int (*export)(hx509_context context,
    251 		  const hx509_private_key,
    252 		  hx509_key_format_t,
    253 		  heim_octet_string *);
    254     int (*import)(hx509_context, const AlgorithmIdentifier *,
    255 		  const void *, size_t, hx509_key_format_t,
    256 		  hx509_private_key);
    257     int (*generate_private_key)(hx509_context,
    258 				struct hx509_generate_private_context *,
    259 				hx509_private_key);
    260     BIGNUM *(*get_internal)(hx509_context, hx509_private_key, const char *);
    261 };
    262 
    263 struct hx509_private_key {
    264     unsigned int ref;
    265     const struct signature_alg *md;
    266     const heim_oid *signature_alg;
    267     union {
    268 	RSA *rsa;
    269 	void *keydata;
    270         void *ecdsa; /* EC_KEY */
    271     } private_key;
    272     hx509_private_key_ops *ops;
    273 };
    274 
    275 /*
    276  *
    277  */
    278 
    279 struct signature_alg {
    280     const char *name;
    281     const heim_oid *sig_oid;
    282     const AlgorithmIdentifier *sig_alg;
    283     const heim_oid *key_oid;
    284     const AlgorithmIdentifier *digest_alg;
    285     int flags;
    286 #define PROVIDE_CONF	0x1
    287 #define REQUIRE_SIGNER	0x2
    288 #define SELF_SIGNED_OK	0x4
    289 #define WEAK_SIG_ALG	0x8
    290 
    291 #define SIG_DIGEST	0x100
    292 #define SIG_PUBLIC_SIG	0x200
    293 #define SIG_SECRET	0x400
    294 
    295 #define RA_RSA_USES_DIGEST_INFO 0x1000000
    296 
    297     time_t best_before; /* refuse signature made after best before date */
    298     const EVP_MD *(*evp_md)(void);
    299     int (*verify_signature)(hx509_context context,
    300 			    const struct signature_alg *,
    301 			    const Certificate *,
    302 			    const AlgorithmIdentifier *,
    303 			    const heim_octet_string *,
    304 			    const heim_octet_string *);
    305     int (*create_signature)(hx509_context,
    306 			    const struct signature_alg *,
    307 			    const hx509_private_key,
    308 			    const AlgorithmIdentifier *,
    309 			    const heim_octet_string *,
    310 			    AlgorithmIdentifier *,
    311 			    heim_octet_string *);
    312     int digest_size;
    313 };
    314 
    315 /*
    316  * Configurable options
    317  */
    318 
    319 #ifdef __APPLE__
    320 #define HX509_DEFAULT_ANCHORS "KEYCHAIN:system-anchors"
    321 #endif
    322