crypto/ct/ct_x509v3.c

   1 /*
   2  * Copyright 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 #ifdef OPENSSL_NO_CT
  11 # error "CT is disabled"
  12 #endif
  13
  14 #include "ct_locl.h"
  15
  16 static char *i2s_poison(const X509V3_EXT_METHOD *method, void *val)
  17 {
  18     return OPENSSL_strdup("NULL");
  19 }
  20
  21 static void *s2i_poison(const X509V3_EXT_METHOD *method, X509V3_CTX *ctx, const char *str)
  22 {
  23    return ASN1_NULL_new();
  24 }
  25
  26 static int i2r_SCT_LIST(X509V3_EXT_METHOD *method, STACK_OF(SCT) *sct_list,
  27                  BIO *out, int indent)
  28 {
  29     SCT_LIST_print(sct_list, out, indent, "\n", NULL);
  30     return 1;
  31 }
  32
  33 static int set_sct_list_source(STACK_OF(SCT) *s, sct_source_t source) {
  34     if (s != NULL) {
  35         for (size_t i = 0; i < sk_SCT_num(s); i++) {
  36             int res = SCT_set_source(
  37                 sk_SCT_value(s, i), SCT_SOURCE_X509V3_EXTENSION);
  38             if (res != 1) {
  39                 return 0;
  40             }
  41         }
  42     }
  43     return 1;
  44 }
  45
  46 static STACK_OF(SCT) *x509_ext_d2i_SCT_LIST(STACK_OF(SCT) **a,
  47                                             const unsigned char **pp,
  48                                             long len) {
  49      STACK_OF(SCT) *s = d2i_SCT_LIST(a, pp, len);
  50      if (set_sct_list_source(s, SCT_SOURCE_X509V3_EXTENSION) != 1) {
  51          SCT_LIST_free(s);
  52          *a = NULL;
  53          return NULL;
  54      }
  55      return s;
  56 }
  57
  58 static STACK_OF(SCT) *ocsp_ext_d2i_SCT_LIST(STACK_OF(SCT) **a,
  59                                             const unsigned char **pp,
  60                                             long len) {
  61     STACK_OF(SCT) *s = d2i_SCT_LIST(a, pp, len);
  62     if (set_sct_list_source(s, SCT_SOURCE_OCSP_STAPLED_RESPONSE) != 1) {
  63         SCT_LIST_free(s);
  64         *a = NULL;
  65         return NULL;
  66     }
  67     return s;
  68 }
  69
  70 /* Handlers for X509v3/OCSP Certificate Transparency extensions */
  71 const X509V3_EXT_METHOD v3_ct_scts[3] = {
  72     /* X509v3 extension in certificates that contains SCTs */
  73     { NID_ct_precert_scts, 0, NULL,
  74     NULL, (X509V3_EXT_FREE)SCT_LIST_free,
  75     (X509V3_EXT_D2I)x509_ext_d2i_SCT_LIST, (X509V3_EXT_I2D)i2d_SCT_LIST,
  76     NULL, NULL,
  77     NULL, NULL,
  78     (X509V3_EXT_I2R)i2r_SCT_LIST, NULL,
  79     NULL },
  80
  81     /* X509v3 extension to mark a certificate as a pre-certificate */
  82     { NID_ct_precert_poison, 0, ASN1_ITEM_ref(ASN1_NULL),
  83     NULL, NULL, NULL, NULL,
  84     i2s_poison, s2i_poison,
  85     NULL, NULL,
  86     NULL, NULL,
  87     NULL },
  88
  89     /* OCSP extension that contains SCTs */
  90     { NID_ct_cert_scts, 0, NULL,
  91     0, (X509V3_EXT_FREE)SCT_LIST_free,
  92     (X509V3_EXT_D2I)ocsp_ext_d2i_SCT_LIST, (X509V3_EXT_I2D)i2d_SCT_LIST,
  93     NULL, NULL,
  94     NULL, NULL,
  95     (X509V3_EXT_I2R)i2r_SCT_LIST, NULL,
  96     NULL },
  97 };