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 66static int policy_data_cmp(const X509_POLICY_DATA *const *a, 67 const X509_POLICY_DATA *const *b); 68static 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 75static 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 123static 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 if (ext_any) 213 ASN1_INTEGER_free(ext_any); 214 215 return 1; 216 217} 218 219void policy_cache_free(X509_POLICY_CACHE *cache) 220{ 221 if (!cache) 222 return; 223 if (cache->anyPolicy) 224 policy_data_free(cache->anyPolicy); 225 if (cache->data) 226 sk_X509_POLICY_DATA_pop_free(cache->data, policy_data_free); 227 OPENSSL_free(cache); 228} 229 230const X509_POLICY_CACHE *policy_cache_set(X509 *x) 231{ 232 233 if (x->policy_cache == NULL) { 234 CRYPTO_w_lock(CRYPTO_LOCK_X509); 235 policy_cache_new(x); 236 CRYPTO_w_unlock(CRYPTO_LOCK_X509); 237 } 238 239 return x->policy_cache; 240 241} 242 243X509_POLICY_DATA *policy_cache_find_data(const X509_POLICY_CACHE *cache, 244 const ASN1_OBJECT *id) 245{ 246 int idx; 247 X509_POLICY_DATA tmp; 248 tmp.valid_policy = (ASN1_OBJECT *)id; 249 idx = sk_X509_POLICY_DATA_find(cache->data, &tmp); 250 if (idx == -1) 251 return NULL; 252 return sk_X509_POLICY_DATA_value(cache->data, idx); 253} 254 255static int policy_data_cmp(const X509_POLICY_DATA *const *a, 256 const X509_POLICY_DATA *const *b) 257{ 258 return OBJ_cmp((*a)->valid_policy, (*b)->valid_policy); 259} 260 261static int policy_cache_set_int(long *out, ASN1_INTEGER *value) 262{ 263 if (value == NULL) 264 return 1; 265 if (value->type == V_ASN1_NEG_INTEGER) 266 return 0; 267 *out = ASN1_INTEGER_get(value); 268 return 1; 269} 270