crypto/x509v3/pcy_cache.c

   1 /* pcy_cache.c */
   2 /*
   3  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   4  * 2004.
   5  */
   6 /* ====================================================================
   7  * Copyright (c) 2004 The OpenSSL Project.  All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  *
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in
  18  *    the documentation and/or other materials provided with the
  19  *    distribution.
  20  *
  21  * 3. All advertising materials mentioning features or use of this
  22  *    software must display the following acknowledgment:
  23  *    "This product includes software developed by the OpenSSL Project
  24  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  25  *
  26  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  27  *    endorse or promote products derived from this software without
  28  *    prior written permission. For written permission, please contact
  29  *    licensing@OpenSSL.org.
  30  *
  31  * 5. Products derived from this software may not be called "OpenSSL"
  32  *    nor may "OpenSSL" appear in their names without prior written
  33  *    permission of the OpenSSL Project.
  34  *
  35  * 6. Redistributions of any form whatsoever must retain the following
  36  *    acknowledgment:
  37  *    "This product includes software developed by the OpenSSL Project
  38  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  41  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  43  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  44  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  45  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  46  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  47  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  49  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  50  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  51  * OF THE POSSIBILITY OF SUCH DAMAGE.
  52  * ====================================================================
  53  *
  54  * This product includes cryptographic software written by Eric Young
  55  * (eay@cryptsoft.com).  This product includes software written by Tim
  56  * Hudson (tjh@cryptsoft.com).
  57  *
  58  */
  59
  60 #include "cryptlib.h"
  61 #include <openssl/x509.h>
  62 #include <openssl/x509v3.h>
  63
  64 #include "pcy_int.h"
  65
  66 static int policy_data_cmp(const X509_POLICY_DATA *const *a,
  67                            const X509_POLICY_DATA *const *b);
  68 static int policy_cache_set_int(long *out, ASN1_INTEGER *value);
  69
  70 /*
  71  * Set cache entry according to CertificatePolicies extension. Note: this
  72  * destroys the passed CERTIFICATEPOLICIES structure.
  73  */
  74
  75 static int policy_cache_create(X509 *x,
  76                                CERTIFICATEPOLICIES *policies, int crit)
  77 {
  78     int i;
  79     int ret = 0;
  80     X509_POLICY_CACHE *cache = x->policy_cache;
  81     X509_POLICY_DATA *data = NULL;
  82     POLICYINFO *policy;
  83     if (sk_POLICYINFO_num(policies) == 0)
  84         goto bad_policy;
  85     cache->data = sk_X509_POLICY_DATA_new(policy_data_cmp);
  86     if (!cache->data)
  87         goto bad_policy;
  88     for (i = 0; i < sk_POLICYINFO_num(policies); i++) {
  89         policy = sk_POLICYINFO_value(policies, i);
  90         data = policy_data_new(policy, NULL, crit);
  91         if (!data)
  92             goto bad_policy;
  93         /*
  94          * Duplicate policy OIDs are illegal: reject if matches found.
  95          */
  96         if (OBJ_obj2nid(data->valid_policy) == NID_any_policy) {
  97             if (cache->anyPolicy) {
  98                 ret = -1;
  99                 goto bad_policy;
 100             }
 101             cache->anyPolicy = data;
 102         } else if (sk_X509_POLICY_DATA_find(cache->data, data) != -1) {
 103             ret = -1;
 104             goto bad_policy;
 105         } else if (!sk_X509_POLICY_DATA_push(cache->data, data))
 106             goto bad_policy;
 107         data = NULL;
 108     }
 109     ret = 1;
 110  bad_policy:
 111     if (ret == -1)
 112         x->ex_flags |= EXFLAG_INVALID_POLICY;
 113     if (data)
 114         policy_data_free(data);
 115     sk_POLICYINFO_pop_free(policies, POLICYINFO_free);
 116     if (ret <= 0) {
 117         sk_X509_POLICY_DATA_pop_free(cache->data, policy_data_free);
 118         cache->data = NULL;
 119     }
 120     return ret;
 121 }
 122
 123 static int policy_cache_new(X509 *x)
 124 {
 125     X509_POLICY_CACHE *cache;
 126     ASN1_INTEGER *ext_any = NULL;
 127     POLICY_CONSTRAINTS *ext_pcons = NULL;
 128     CERTIFICATEPOLICIES *ext_cpols = NULL;
 129     POLICY_MAPPINGS *ext_pmaps = NULL;
 130     int i;
 131     cache = OPENSSL_malloc(sizeof(X509_POLICY_CACHE));
 132     if (!cache)
 133         return 0;
 134     cache->anyPolicy = NULL;
 135     cache->data = NULL;
 136     cache->any_skip = -1;
 137     cache->explicit_skip = -1;
 138     cache->map_skip = -1;
 139
 140     x->policy_cache = cache;
 141
 142     /*
 143      * Handle requireExplicitPolicy *first*. Need to process this even if we
 144      * don't have any policies.
 145      */
 146     ext_pcons = X509_get_ext_d2i(x, NID_policy_constraints, &i, NULL);
 147
 148     if (!ext_pcons) {
 149         if (i != -1)
 150             goto bad_cache;
 151     } else {
 152         if (!ext_pcons->requireExplicitPolicy
 153             && !ext_pcons->inhibitPolicyMapping)
 154             goto bad_cache;
 155         if (!policy_cache_set_int(&cache->explicit_skip,
 156                                   ext_pcons->requireExplicitPolicy))
 157             goto bad_cache;
 158         if (!policy_cache_set_int(&cache->map_skip,
 159                                   ext_pcons->inhibitPolicyMapping))
 160             goto bad_cache;
 161     }
 162
 163     /* Process CertificatePolicies */
 164
 165     ext_cpols = X509_get_ext_d2i(x, NID_certificate_policies, &i, NULL);
 166     /*
 167      * If no CertificatePolicies extension or problem decoding then there is
 168      * no point continuing because the valid policies will be NULL.
 169      */
 170     if (!ext_cpols) {
 171         /* If not absent some problem with extension */
 172         if (i != -1)
 173             goto bad_cache;
 174         return 1;
 175     }
 176
 177     i = policy_cache_create(x, ext_cpols, i);
 178
 179     /* NB: ext_cpols freed by policy_cache_set_policies */
 180
 181     if (i <= 0)
 182         return i;
 183
 184     ext_pmaps = X509_get_ext_d2i(x, NID_policy_mappings, &i, NULL);
 185
 186     if (!ext_pmaps) {
 187         /* If not absent some problem with extension */
 188         if (i != -1)
 189             goto bad_cache;
 190     } else {
 191         i = policy_cache_set_mapping(x, ext_pmaps);
 192         if (i <= 0)
 193             goto bad_cache;
 194     }
 195
 196     ext_any = X509_get_ext_d2i(x, NID_inhibit_any_policy, &i, NULL);
 197
 198     if (!ext_any) {
 199         if (i != -1)
 200             goto bad_cache;
 201     } else if (!policy_cache_set_int(&cache->any_skip, ext_any))
 202         goto bad_cache;
 203
 204     if (0) {
 205  bad_cache:
 206         x->ex_flags |= EXFLAG_INVALID_POLICY;
 207     }
 208
 209     if (ext_pcons)
 210         POLICY_CONSTRAINTS_free(ext_pcons);
 211
 212     ASN1_INTEGER_free(ext_any);
 213
 214     return 1;
 215
 216 }
 217
 218 void policy_cache_free(X509_POLICY_CACHE *cache)
 219 {
 220     if (!cache)
 221         return;
 222     if (cache->anyPolicy)
 223         policy_data_free(cache->anyPolicy);
 224     if (cache->data)
 225         sk_X509_POLICY_DATA_pop_free(cache->data, policy_data_free);
 226     OPENSSL_free(cache);
 227 }
 228
 229 const X509_POLICY_CACHE *policy_cache_set(X509 *x)
 230 {
 231
 232     if (x->policy_cache == NULL) {
 233         CRYPTO_w_lock(CRYPTO_LOCK_X509);
 234         policy_cache_new(x);
 235         CRYPTO_w_unlock(CRYPTO_LOCK_X509);
 236     }
 237
 238     return x->policy_cache;
 239
 240 }
 241
 242 X509_POLICY_DATA *policy_cache_find_data(const X509_POLICY_CACHE *cache,
 243                                          const ASN1_OBJECT *id)
 244 {
 245     int idx;
 246     X509_POLICY_DATA tmp;
 247     tmp.valid_policy = (ASN1_OBJECT *)id;
 248     idx = sk_X509_POLICY_DATA_find(cache->data, &tmp);
 249     if (idx == -1)
 250         return NULL;
 251     return sk_X509_POLICY_DATA_value(cache->data, idx);
 252 }
 253
 254 static int policy_data_cmp(const X509_POLICY_DATA *const *a,
 255                            const X509_POLICY_DATA *const *b)
 256 {
 257     return OBJ_cmp((*a)->valid_policy, (*b)->valid_policy);
 258 }
 259
 260 static int policy_cache_set_int(long *out, ASN1_INTEGER *value)
 261 {
 262     if (value == NULL)
 263         return 1;
 264     if (value->type == V_ASN1_NEG_INTEGER)
 265         return 0;
 266     *out = ASN1_INTEGER_get(value);
 267     return 1;
 268 }