1/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL 2 * project 2004. 3 */ 4/* ==================================================================== 5 * Copyright (c) 2004 The OpenSSL Project. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the 17 * distribution. 18 * 19 * 3. All advertising materials mentioning features or use of this 20 * software must display the following acknowledgment: 21 * "This product includes software developed by the OpenSSL Project 22 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 23 * 24 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 25 * endorse or promote products derived from this software without 26 * prior written permission. For written permission, please contact 27 * licensing@OpenSSL.org. 28 * 29 * 5. Products derived from this software may not be called "OpenSSL" 30 * nor may "OpenSSL" appear in their names without prior written 31 * permission of the OpenSSL Project. 32 * 33 * 6. Redistributions of any form whatsoever must retain the following 34 * acknowledgment: 35 * "This product includes software developed by the OpenSSL Project 36 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 37 * 38 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 39 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 41 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 42 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 43 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 44 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 45 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 47 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 48 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 49 * OF THE POSSIBILITY OF SUCH DAMAGE. 50 * ==================================================================== 51 * 52 * This product includes cryptographic software written by Eric Young 53 * (eay@cryptsoft.com). This product includes software written by Tim 54 * Hudson (tjh@cryptsoft.com). */ 55 56#include <openssl/mem.h> 57#include <openssl/obj.h> 58#include <openssl/thread.h> 59#include <openssl/x509.h> 60#include <openssl/x509v3.h> 61 62#include "pcy_int.h" 63 64 65static int policy_data_cmp(const X509_POLICY_DATA **a, 66 const X509_POLICY_DATA **b); 67static 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 73static int policy_cache_create(X509 *x, 74 CERTIFICATEPOLICIES *policies, int crit) 75 { 76 size_t 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, NULL, data)) 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 129static 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->any_skip = -1; 143 cache->explicit_skip = -1; 144 cache->map_skip = -1; 145 146 x->policy_cache = cache; 147 148 /* Handle requireExplicitPolicy *first*. Need to process this 149 * even if we don't have any policies. 150 */ 151 ext_pcons = X509_get_ext_d2i(x, NID_policy_constraints, &i, NULL); 152 153 if (!ext_pcons) 154 { 155 if (i != -1) 156 goto bad_cache; 157 } 158 else 159 { 160 if (!ext_pcons->requireExplicitPolicy 161 && !ext_pcons->inhibitPolicyMapping) 162 goto bad_cache; 163 if (!policy_cache_set_int(&cache->explicit_skip, 164 ext_pcons->requireExplicitPolicy)) 165 goto bad_cache; 166 if (!policy_cache_set_int(&cache->map_skip, 167 ext_pcons->inhibitPolicyMapping)) 168 goto bad_cache; 169 } 170 171 /* Process CertificatePolicies */ 172 173 ext_cpols = X509_get_ext_d2i(x, NID_certificate_policies, &i, NULL); 174 /* If no CertificatePolicies extension or problem decoding then 175 * there is no point continuing because the valid policies will be 176 * NULL. 177 */ 178 if (!ext_cpols) 179 { 180 /* If not absent some problem with extension */ 181 if (i != -1) 182 goto bad_cache; 183 return 1; 184 } 185 186 i = policy_cache_create(x, ext_cpols, i); 187 188 /* NB: ext_cpols freed by policy_cache_set_policies */ 189 190 if (i <= 0) 191 return i; 192 193 ext_pmaps = X509_get_ext_d2i(x, NID_policy_mappings, &i, NULL); 194 195 if (!ext_pmaps) 196 { 197 /* If not absent some problem with extension */ 198 if (i != -1) 199 goto bad_cache; 200 } 201 else 202 { 203 i = policy_cache_set_mapping(x, ext_pmaps); 204 if (i <= 0) 205 goto bad_cache; 206 } 207 208 ext_any = X509_get_ext_d2i(x, NID_inhibit_any_policy, &i, NULL); 209 210 if (!ext_any) 211 { 212 if (i != -1) 213 goto bad_cache; 214 } 215 else if (!policy_cache_set_int(&cache->any_skip, ext_any)) 216 goto bad_cache; 217 218 if (0) 219 { 220 bad_cache: 221 x->ex_flags |= EXFLAG_INVALID_POLICY; 222 } 223 224 if(ext_pcons) 225 POLICY_CONSTRAINTS_free(ext_pcons); 226 227 if (ext_any) 228 ASN1_INTEGER_free(ext_any); 229 230 return 1; 231 232 233} 234 235void policy_cache_free(X509_POLICY_CACHE *cache) 236 { 237 if (!cache) 238 return; 239 if (cache->anyPolicy) 240 policy_data_free(cache->anyPolicy); 241 if (cache->data) 242 sk_X509_POLICY_DATA_pop_free(cache->data, policy_data_free); 243 OPENSSL_free(cache); 244 } 245 246const X509_POLICY_CACHE *policy_cache_set(X509 *x) 247 { 248 249 if (x->policy_cache == NULL) 250 { 251 CRYPTO_w_lock(CRYPTO_LOCK_X509); 252 policy_cache_new(x); 253 CRYPTO_w_unlock(CRYPTO_LOCK_X509); 254 } 255 256 return x->policy_cache; 257 258 } 259 260X509_POLICY_DATA *policy_cache_find_data(const X509_POLICY_CACHE *cache, 261 const ASN1_OBJECT *id) 262 { 263 size_t idx; 264 X509_POLICY_DATA tmp; 265 266 tmp.valid_policy = (ASN1_OBJECT *)id; 267 if (!sk_X509_POLICY_DATA_find(cache->data, &idx, &tmp)) 268 return NULL; 269 return sk_X509_POLICY_DATA_value(cache->data, idx); 270 } 271 272static int policy_data_cmp(const X509_POLICY_DATA **a, 273 const X509_POLICY_DATA **b) 274 { 275 return OBJ_cmp((*a)->valid_policy, (*b)->valid_policy); 276 } 277 278static int policy_cache_set_int(long *out, ASN1_INTEGER *value) 279 { 280 if (value == NULL) 281 return 1; 282 if (value->type == V_ASN1_NEG_INTEGER) 283 return 0; 284 *out = ASN1_INTEGER_get(value); 285 return 1; 286 } 287