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      1 /*
      2  * Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved.
      3  *
      4  * Licensed under the OpenSSL license (the "License").  You may not use
      5  * this file except in compliance with the License.  You can obtain a copy
      6  * in the file LICENSE in the source distribution or at
      7  * https://www.openssl.org/source/license.html
      8  */
      9 
     10 #ifndef OSSL_INTERNAL_DANE_H
     11 #define OSSL_INTERNAL_DANE_H
     12 
     13 #include <openssl/safestack.h>
     14 
     15 /*-
     16  * Certificate usages:
     17  * https://tools.ietf.org/html/rfc6698#section-2.1.1
     18  */
     19 #define DANETLS_USAGE_PKIX_TA   0
     20 #define DANETLS_USAGE_PKIX_EE   1
     21 #define DANETLS_USAGE_DANE_TA   2
     22 #define DANETLS_USAGE_DANE_EE   3
     23 #define DANETLS_USAGE_LAST      DANETLS_USAGE_DANE_EE
     24 
     25 /*-
     26  * Selectors:
     27  * https://tools.ietf.org/html/rfc6698#section-2.1.2
     28  */
     29 #define DANETLS_SELECTOR_CERT   0
     30 #define DANETLS_SELECTOR_SPKI   1
     31 #define DANETLS_SELECTOR_LAST   DANETLS_SELECTOR_SPKI
     32 
     33 /*-
     34  * Matching types:
     35  * https://tools.ietf.org/html/rfc6698#section-2.1.3
     36  */
     37 #define DANETLS_MATCHING_FULL   0
     38 #define DANETLS_MATCHING_2256   1
     39 #define DANETLS_MATCHING_2512   2
     40 #define DANETLS_MATCHING_LAST   DANETLS_MATCHING_2512
     41 
     42 typedef struct danetls_record_st {
     43     uint8_t usage;
     44     uint8_t selector;
     45     uint8_t mtype;
     46     unsigned char *data;
     47     size_t dlen;
     48     EVP_PKEY *spki;
     49 } danetls_record;
     50 
     51 DEFINE_STACK_OF(danetls_record)
     52 
     53 /*
     54  * Shared DANE context
     55  */
     56 struct dane_ctx_st {
     57     const EVP_MD  **mdevp;      /* mtype -> digest */
     58     uint8_t        *mdord;      /* mtype -> preference */
     59     uint8_t         mdmax;      /* highest supported mtype */
     60     unsigned long   flags;      /* feature bitmask */
     61 };
     62 
     63 /*
     64  * Per connection DANE state
     65  */
     66 struct ssl_dane_st {
     67     struct dane_ctx_st *dctx;
     68     STACK_OF(danetls_record) *trecs;
     69     STACK_OF(X509) *certs;      /* DANE-TA(2) Cert(0) Full(0) certs */
     70     danetls_record *mtlsa;      /* Matching TLSA record */
     71     X509           *mcert;      /* DANE matched cert */
     72     uint32_t        umask;      /* Usages present */
     73     int             mdpth;      /* Depth of matched cert */
     74     int             pdpth;      /* Depth of PKIX trust */
     75     unsigned long   flags;      /* feature bitmask */
     76 };
     77 
     78 #define DANETLS_ENABLED(dane)  \
     79     ((dane) != NULL && sk_danetls_record_num((dane)->trecs) > 0)
     80 
     81 #define DANETLS_USAGE_BIT(u)   (((uint32_t)1) << u)
     82 
     83 #define DANETLS_PKIX_TA_MASK (DANETLS_USAGE_BIT(DANETLS_USAGE_PKIX_TA))
     84 #define DANETLS_PKIX_EE_MASK (DANETLS_USAGE_BIT(DANETLS_USAGE_PKIX_EE))
     85 #define DANETLS_DANE_TA_MASK (DANETLS_USAGE_BIT(DANETLS_USAGE_DANE_TA))
     86 #define DANETLS_DANE_EE_MASK (DANETLS_USAGE_BIT(DANETLS_USAGE_DANE_EE))
     87 
     88 #define DANETLS_PKIX_MASK (DANETLS_PKIX_TA_MASK | DANETLS_PKIX_EE_MASK)
     89 #define DANETLS_DANE_MASK (DANETLS_DANE_TA_MASK | DANETLS_DANE_EE_MASK)
     90 #define DANETLS_TA_MASK (DANETLS_PKIX_TA_MASK | DANETLS_DANE_TA_MASK)
     91 #define DANETLS_EE_MASK (DANETLS_PKIX_EE_MASK | DANETLS_DANE_EE_MASK)
     92 
     93 #define DANETLS_HAS_PKIX(dane) ((dane) && ((dane)->umask & DANETLS_PKIX_MASK))
     94 #define DANETLS_HAS_DANE(dane) ((dane) && ((dane)->umask & DANETLS_DANE_MASK))
     95 #define DANETLS_HAS_TA(dane)   ((dane) && ((dane)->umask & DANETLS_TA_MASK))
     96 #define DANETLS_HAS_EE(dane)   ((dane) && ((dane)->umask & DANETLS_EE_MASK))
     97 
     98 #define DANETLS_HAS_PKIX_TA(dane) ((dane)&&((dane)->umask & DANETLS_PKIX_TA_MASK))
     99 #define DANETLS_HAS_PKIX_EE(dane) ((dane)&&((dane)->umask & DANETLS_PKIX_EE_MASK))
    100 #define DANETLS_HAS_DANE_TA(dane) ((dane)&&((dane)->umask & DANETLS_DANE_TA_MASK))
    101 #define DANETLS_HAS_DANE_EE(dane) ((dane)&&((dane)->umask & DANETLS_DANE_EE_MASK))
    102 
    103 #endif /* OSSL_INTERNAL_DANE_H */
    104