include/internal/dane.h

   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 HEADER_INTERNAL_DANE_H
  11 #define HEADER_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 };
  61
  62 /*
  63  * Per connection DANE state
  64  */
  65 struct ssl_dane_st {
  66     struct dane_ctx_st *dctx;
  67     STACK_OF(danetls_record) *trecs;
  68     STACK_OF(X509) *certs;      /* DANE-TA(2) Cert(0) Full(0) certs */
  69     danetls_record *mtlsa;      /* Matching TLSA record */
  70     X509           *mcert;      /* DANE matched cert */
  71     uint32_t        umask;      /* Usages present */
  72     int             mdpth;      /* Depth of matched cert */
  73     int             pdpth;      /* Depth of PKIX trust */
  74 };
  75
  76 #define DANETLS_ENABLED(dane)  \
  77     ((dane) != NULL && sk_danetls_record_num((dane)->trecs) > 0)
  78
  79 #define DANETLS_USAGE_BIT(u)   (((uint32_t)1) << u)
  80
  81 #define DANETLS_PKIX_TA_MASK (DANETLS_USAGE_BIT(DANETLS_USAGE_PKIX_TA))
  82 #define DANETLS_PKIX_EE_MASK (DANETLS_USAGE_BIT(DANETLS_USAGE_PKIX_EE))
  83 #define DANETLS_DANE_TA_MASK (DANETLS_USAGE_BIT(DANETLS_USAGE_DANE_TA))
  84 #define DANETLS_DANE_EE_MASK (DANETLS_USAGE_BIT(DANETLS_USAGE_DANE_EE))
  85
  86 #define DANETLS_PKIX_MASK (DANETLS_PKIX_TA_MASK | DANETLS_PKIX_EE_MASK)
  87 #define DANETLS_DANE_MASK (DANETLS_DANE_TA_MASK | DANETLS_DANE_EE_MASK)
  88 #define DANETLS_TA_MASK (DANETLS_PKIX_TA_MASK | DANETLS_DANE_TA_MASK)
  89 #define DANETLS_EE_MASK (DANETLS_PKIX_EE_MASK | DANETLS_DANE_EE_MASK)
  90
  91 #define DANETLS_HAS_PKIX(dane) ((dane) && ((dane)->umask & DANETLS_PKIX_MASK))
  92 #define DANETLS_HAS_DANE(dane) ((dane) && ((dane)->umask & DANETLS_DANE_MASK))
  93 #define DANETLS_HAS_TA(dane)   ((dane) && ((dane)->umask & DANETLS_TA_MASK))
  94 #define DANETLS_HAS_EE(dane)   ((dane) && ((dane)->umask & DANETLS_EE_MASK))
  95
  96 #define DANETLS_HAS_PKIX_TA(dane) ((dane)&&((dane)->umask & DANETLS_PKIX_TA_MASK))
  97 #define DANETLS_HAS_PKIX_EE(dane) ((dane)&&((dane)->umask & DANETLS_PKIX_EE_MASK))
  98 #define DANETLS_HAS_DANE_TA(dane) ((dane)&&((dane)->umask & DANETLS_DANE_TA_MASK))
  99 #define DANETLS_HAS_DANE_EE(dane) ((dane)&&((dane)->umask & DANETLS_DANE_EE_MASK))
 100
 101 #endif /* HEADER_INTERNAL_DANE_H */