crypto/ct/ct_x509v3.c

   1 /*
   2  * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (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_local.h"
  15
  16 DEFINE_STACK_OF(SCT)
  17
  18 static char *i2s_poison(const X509V3_EXT_METHOD *method, void *val)
  19 {
  20     return OPENSSL_strdup("NULL");
  21 }
  22
  23 static void *s2i_poison(const X509V3_EXT_METHOD *method, X509V3_CTX *ctx, const char *str)
  24 {
  25    return ASN1_NULL_new();
  26 }
  27
  28 static int i2r_SCT_LIST(X509V3_EXT_METHOD *method, STACK_OF(SCT) *sct_list,
  29                  BIO *out, int indent)
  30 {
  31     SCT_LIST_print(sct_list, out, indent, "\n", NULL);
  32     return 1;
  33 }
  34
  35 static int set_sct_list_source(STACK_OF(SCT) *s, sct_source_t source)
  36 {
  37     if (s != NULL) {
  38         int i;
  39
  40         for (i = 0; i < sk_SCT_num(s); i++) {
  41             int res = SCT_set_source(sk_SCT_value(s, i), source);
  42
  43             if (res != 1) {
  44                 return 0;
  45             }
  46         }
  47     }
  48     return 1;
  49 }
  50
  51 static STACK_OF(SCT) *x509_ext_d2i_SCT_LIST(STACK_OF(SCT) **a,
  52                                             const unsigned char **pp,
  53                                             long len)
  54 {
  55      STACK_OF(SCT) *s = d2i_SCT_LIST(a, pp, len);
  56
  57      if (set_sct_list_source(s, SCT_SOURCE_X509V3_EXTENSION) != 1) {
  58          SCT_LIST_free(s);
  59          *a = NULL;
  60          return NULL;
  61      }
  62      return s;
  63 }
  64
  65 static STACK_OF(SCT) *ocsp_ext_d2i_SCT_LIST(STACK_OF(SCT) **a,
  66                                             const unsigned char **pp,
  67                                             long len)
  68 {
  69     STACK_OF(SCT) *s = d2i_SCT_LIST(a, pp, len);
  70
  71     if (set_sct_list_source(s, SCT_SOURCE_OCSP_STAPLED_RESPONSE) != 1) {
  72         SCT_LIST_free(s);
  73         *a = NULL;
  74         return NULL;
  75     }
  76     return s;
  77 }
  78
  79 /* Handlers for X509v3/OCSP Certificate Transparency extensions */
  80 const X509V3_EXT_METHOD v3_ct_scts[3] = {
  81     /* X509v3 extension in certificates that contains SCTs */
  82     { NID_ct_precert_scts, 0, NULL,
  83     NULL, (X509V3_EXT_FREE)SCT_LIST_free,
  84     (X509V3_EXT_D2I)x509_ext_d2i_SCT_LIST, (X509V3_EXT_I2D)i2d_SCT_LIST,
  85     NULL, NULL,
  86     NULL, NULL,
  87     (X509V3_EXT_I2R)i2r_SCT_LIST, NULL,
  88     NULL },
  89
  90     /* X509v3 extension to mark a certificate as a pre-certificate */
  91     { NID_ct_precert_poison, 0, ASN1_ITEM_ref(ASN1_NULL),
  92     NULL, NULL, NULL, NULL,
  93     i2s_poison, s2i_poison,
  94     NULL, NULL,
  95     NULL, NULL,
  96     NULL },
  97
  98     /* OCSP extension that contains SCTs */
  99     { NID_ct_cert_scts, 0, NULL,
 100     0, (X509V3_EXT_FREE)SCT_LIST_free,
 101     (X509V3_EXT_D2I)ocsp_ext_d2i_SCT_LIST, (X509V3_EXT_I2D)i2d_SCT_LIST,
 102     NULL, NULL,
 103     NULL, NULL,
 104     (X509V3_EXT_I2R)i2r_SCT_LIST, NULL,
 105     NULL },
 106 };