Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* pcy_cache.c */ |
| 2 | /* Written by Dr Stephen N Henson (steve@openssl.org) 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->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 | |
| 235 | void 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 | |
| 246 | const 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 | |
| 260 | X509_POLICY_DATA *policy_cache_find_data(const X509_POLICY_CACHE *cache, |
| 261 | const ASN1_OBJECT *id) |
| 262 | { |
| 263 | int idx; |
| 264 | X509_POLICY_DATA tmp; |
| 265 | tmp.valid_policy = (ASN1_OBJECT *)id; |
| 266 | idx = sk_X509_POLICY_DATA_find(cache->data, &tmp); |
| 267 | if (idx == -1) |
| 268 | return NULL; |
| 269 | return sk_X509_POLICY_DATA_value(cache->data, idx); |
| 270 | } |
| 271 | |
| 272 | static int policy_data_cmp(const X509_POLICY_DATA * const *a, |
| 273 | const X509_POLICY_DATA * const *b) |
| 274 | { |
| 275 | return OBJ_cmp((*a)->valid_policy, (*b)->valid_policy); |
| 276 | } |
| 277 | |
| 278 | static 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 | } |