crypto/openssl-0.9/crypto/x509v3/pcy_cache.c

   1 /* pcy_cache.c */
   2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
   3  * project 2004.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2004 The OpenSSL Project.  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
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 #include "cryptlib.h"
  60 #include <openssl/x509.h>
  61 #include <openssl/x509v3.h>
  62
  63 #include "pcy_int.h"
  64
  65 static int policy_data_cmp(const X509_POLICY_DATA * const *a,
  66                                 const X509_POLICY_DATA * const *b);
  67 static int policy_cache_set_int(long *out, ASN1_INTEGER *value);
  68
  69 /* Set cache entry according to CertificatePolicies extension.
  70  * Note: this destroys the passed CERTIFICATEPOLICIES structure.
  71  */
  72
  73 static int policy_cache_create(X509 *x,
  74                         CERTIFICATEPOLICIES *policies, int crit)
  75         {
  76         int i;
  77         int ret = 0;
  78         X509_POLICY_CACHE *cache = x->policy_cache;
  79         X509_POLICY_DATA *data = NULL;
  80         POLICYINFO *policy;
  81         if (sk_POLICYINFO_num(policies) == 0)
  82                 goto bad_policy;
  83         cache->data = sk_X509_POLICY_DATA_new(policy_data_cmp);
  84         if (!cache->data)
  85                 goto bad_policy;
  86         for (i = 0; i < sk_POLICYINFO_num(policies); i++)
  87                 {
  88                 policy = sk_POLICYINFO_value(policies, i);
  89                 data = policy_data_new(policy, NULL, crit);
  90                 if (!data)
  91                         goto bad_policy;
  92                 /* Duplicate policy OIDs are illegal: reject if matches
  93                  * found.
  94                  */
  95                 if (OBJ_obj2nid(data->valid_policy) == NID_any_policy)
  96                         {
  97                         if (cache->anyPolicy)
  98                                 {
  99                                 ret = -1;
 100                                 goto bad_policy;
 101                                 }
 102                         cache->anyPolicy = data;
 103                         }
 104                 else if (sk_X509_POLICY_DATA_find(cache->data, data) != -1)
 105                         {
 106                         ret = -1;
 107                         goto bad_policy;
 108                         }
 109                 else if (!sk_X509_POLICY_DATA_push(cache->data, data))
 110                         goto bad_policy;
 111                 data = NULL;
 112                 }
 113         ret = 1;
 114         bad_policy:
 115         if (ret == -1)
 116                 x->ex_flags |= EXFLAG_INVALID_POLICY;
 117         if (data)
 118                 policy_data_free(data);
 119         sk_POLICYINFO_pop_free(policies, POLICYINFO_free);
 120         if (ret <= 0)
 121                 {
 122                 sk_X509_POLICY_DATA_pop_free(cache->data, policy_data_free);
 123                 cache->data = NULL;
 124                 }
 125         return ret;
 126         }
 127
 128
 129 static int policy_cache_new(X509 *x)
 130         {
 131         X509_POLICY_CACHE *cache;
 132         ASN1_INTEGER *ext_any = NULL;
 133         POLICY_CONSTRAINTS *ext_pcons = NULL;
 134         CERTIFICATEPOLICIES *ext_cpols = NULL;
 135         POLICY_MAPPINGS *ext_pmaps = NULL;
 136         int i;
 137         cache = OPENSSL_malloc(sizeof(X509_POLICY_CACHE));
 138         if (!cache)
 139                 return 0;
 140         cache->anyPolicy = NULL;
 141         cache->data = NULL;
 142         cache->maps = NULL;
 143         cache->any_skip = -1;
 144         cache->explicit_skip = -1;
 145         cache->map_skip = -1;
 146
 147         x->policy_cache = cache;
 148
 149         /* Handle requireExplicitPolicy *first*. Need to process this
 150          * even if we don't have any policies.
 151          */
 152         ext_pcons = X509_get_ext_d2i(x, NID_policy_constraints, &i, NULL);
 153
 154         if (!ext_pcons)
 155                 {
 156                 if (i != -1)
 157                         goto bad_cache;
 158                 }
 159         else
 160                 {
 161                 if (!ext_pcons->requireExplicitPolicy
 162                         && !ext_pcons->inhibitPolicyMapping)
 163                         goto bad_cache;
 164                 if (!policy_cache_set_int(&cache->explicit_skip,
 165                         ext_pcons->requireExplicitPolicy))
 166                         goto bad_cache;
 167                 if (!policy_cache_set_int(&cache->map_skip,
 168                         ext_pcons->inhibitPolicyMapping))
 169                         goto bad_cache;
 170                 }
 171
 172         /* Process CertificatePolicies */
 173
 174         ext_cpols = X509_get_ext_d2i(x, NID_certificate_policies, &i, NULL);
 175         /* If no CertificatePolicies extension or problem decoding then
 176          * there is no point continuing because the valid policies will be
 177          * NULL.
 178          */
 179         if (!ext_cpols)
 180                 {
 181                 /* If not absent some problem with extension */
 182                 if (i != -1)
 183                         goto bad_cache;
 184                 return 1;
 185                 }
 186
 187         i = policy_cache_create(x, ext_cpols, i);
 188
 189         /* NB: ext_cpols freed by policy_cache_set_policies */
 190
 191         if (i <= 0)
 192                 return i;
 193
 194         ext_pmaps = X509_get_ext_d2i(x, NID_policy_mappings, &i, NULL);
 195
 196         if (!ext_pmaps)
 197                 {
 198                 /* If not absent some problem with extension */
 199                 if (i != -1)
 200                         goto bad_cache;
 201                 }
 202         else
 203                 {
 204                 i = policy_cache_set_mapping(x, ext_pmaps);
 205                 if (i <= 0)
 206                         goto bad_cache;
 207                 }
 208
 209         ext_any = X509_get_ext_d2i(x, NID_inhibit_any_policy, &i, NULL);
 210
 211         if (!ext_any)
 212                 {
 213                 if (i != -1)
 214                         goto bad_cache;
 215                 }
 216         else if (!policy_cache_set_int(&cache->any_skip, ext_any))
 217                         goto bad_cache;
 218
 219         if (0)
 220                 {
 221                 bad_cache:
 222                 x->ex_flags |= EXFLAG_INVALID_POLICY;
 223                 }
 224
 225         if(ext_pcons)
 226                 POLICY_CONSTRAINTS_free(ext_pcons);
 227
 228         if (ext_any)
 229                 ASN1_INTEGER_free(ext_any);
 230
 231         return 1;
 232
 233
 234 }
 235
 236 void policy_cache_free(X509_POLICY_CACHE *cache)
 237         {
 238         if (!cache)
 239                 return;
 240         if (cache->anyPolicy)
 241                 policy_data_free(cache->anyPolicy);
 242         if (cache->data)
 243                 sk_X509_POLICY_DATA_pop_free(cache->data, policy_data_free);
 244         OPENSSL_free(cache);
 245         }
 246
 247 const X509_POLICY_CACHE *policy_cache_set(X509 *x)
 248         {
 249
 250         if (x->policy_cache == NULL)
 251                 {
 252                 CRYPTO_w_lock(CRYPTO_LOCK_X509);
 253                         policy_cache_new(x);
 254                 CRYPTO_w_unlock(CRYPTO_LOCK_X509);
 255                 }
 256
 257         return x->policy_cache;
 258
 259         }
 260
 261 X509_POLICY_DATA *policy_cache_find_data(const X509_POLICY_CACHE *cache,
 262                                                 const ASN1_OBJECT *id)
 263         {
 264         int idx;
 265         X509_POLICY_DATA tmp;
 266         tmp.valid_policy = (ASN1_OBJECT *)id;
 267         idx = sk_X509_POLICY_DATA_find(cache->data, &tmp);
 268         if (idx == -1)
 269                 return NULL;
 270         return sk_X509_POLICY_DATA_value(cache->data, idx);
 271         }
 272
 273 static int policy_data_cmp(const X509_POLICY_DATA * const *a,
 274                                 const X509_POLICY_DATA * const *b)
 275         {
 276         return OBJ_cmp((*a)->valid_policy, (*b)->valid_policy);
 277         }
 278
 279 static int policy_cache_set_int(long *out, ASN1_INTEGER *value)
 280         {
 281         if (value == NULL)
 282                 return 1;
 283         if (value->type == V_ASN1_NEG_INTEGER)
 284                 return 0;
 285         *out = ASN1_INTEGER_get(value);
 286         return 1;
 287         }