Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* x509_vpm.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 <stdio.h> |
| 60 | |
| 61 | #include "cryptlib.h" |
| 62 | #include <openssl/crypto.h> |
| 63 | #include <openssl/lhash.h> |
| 64 | #include <openssl/buffer.h> |
| 65 | #include <openssl/x509.h> |
| 66 | #include <openssl/x509v3.h> |
| 67 | |
| 68 | /* X509_VERIFY_PARAM functions */ |
| 69 | |
| 70 | static void x509_verify_param_zero(X509_VERIFY_PARAM *param) |
| 71 | { |
| 72 | if (!param) |
| 73 | return; |
| 74 | param->name = NULL; |
| 75 | param->purpose = 0; |
| 76 | param->trust = 0; |
| 77 | /*param->inh_flags = X509_VP_FLAG_DEFAULT;*/ |
| 78 | param->inh_flags = 0; |
| 79 | param->flags = 0; |
| 80 | param->depth = -1; |
| 81 | if (param->policies) |
| 82 | { |
| 83 | sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free); |
| 84 | param->policies = NULL; |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | X509_VERIFY_PARAM *X509_VERIFY_PARAM_new(void) |
| 89 | { |
| 90 | X509_VERIFY_PARAM *param; |
| 91 | param = OPENSSL_malloc(sizeof(X509_VERIFY_PARAM)); |
| 92 | memset(param, 0, sizeof(X509_VERIFY_PARAM)); |
| 93 | x509_verify_param_zero(param); |
| 94 | return param; |
| 95 | } |
| 96 | |
| 97 | void X509_VERIFY_PARAM_free(X509_VERIFY_PARAM *param) |
| 98 | { |
| 99 | x509_verify_param_zero(param); |
| 100 | OPENSSL_free(param); |
| 101 | } |
| 102 | |
| 103 | /* This function determines how parameters are "inherited" from one structure |
| 104 | * to another. There are several different ways this can happen. |
| 105 | * |
| 106 | * 1. If a child structure needs to have its values initialized from a parent |
| 107 | * they are simply copied across. For example SSL_CTX copied to SSL. |
| 108 | * 2. If the structure should take on values only if they are currently unset. |
| 109 | * For example the values in an SSL structure will take appropriate value |
| 110 | * for SSL servers or clients but only if the application has not set new |
| 111 | * ones. |
| 112 | * |
| 113 | * The "inh_flags" field determines how this function behaves. |
| 114 | * |
| 115 | * Normally any values which are set in the default are not copied from the |
| 116 | * destination and verify flags are ORed together. |
| 117 | * |
| 118 | * If X509_VP_FLAG_DEFAULT is set then anything set in the source is copied |
| 119 | * to the destination. Effectively the values in "to" become default values |
| 120 | * which will be used only if nothing new is set in "from". |
| 121 | * |
| 122 | * If X509_VP_FLAG_OVERWRITE is set then all value are copied across whether |
| 123 | * they are set or not. Flags is still Ored though. |
| 124 | * |
| 125 | * If X509_VP_FLAG_RESET_FLAGS is set then the flags value is copied instead |
| 126 | * of ORed. |
| 127 | * |
| 128 | * If X509_VP_FLAG_LOCKED is set then no values are copied. |
| 129 | * |
| 130 | * If X509_VP_FLAG_ONCE is set then the current inh_flags setting is zeroed |
| 131 | * after the next call. |
| 132 | */ |
| 133 | |
| 134 | /* Macro to test if a field should be copied from src to dest */ |
| 135 | |
| 136 | #define test_x509_verify_param_copy(field, def) \ |
| 137 | (to_overwrite || \ |
| 138 | ((src->field != def) && (to_default || (dest->field == def)))) |
| 139 | |
| 140 | /* Macro to test and copy a field if necessary */ |
| 141 | |
| 142 | #define x509_verify_param_copy(field, def) \ |
| 143 | if (test_x509_verify_param_copy(field, def)) \ |
| 144 | dest->field = src->field |
| 145 | |
| 146 | |
| 147 | int X509_VERIFY_PARAM_inherit(X509_VERIFY_PARAM *dest, |
| 148 | const X509_VERIFY_PARAM *src) |
| 149 | { |
| 150 | unsigned long inh_flags; |
| 151 | int to_default, to_overwrite; |
| 152 | if (!src) |
| 153 | return 1; |
| 154 | inh_flags = dest->inh_flags | src->inh_flags; |
| 155 | |
| 156 | if (inh_flags & X509_VP_FLAG_ONCE) |
| 157 | dest->inh_flags = 0; |
| 158 | |
| 159 | if (inh_flags & X509_VP_FLAG_LOCKED) |
| 160 | return 1; |
| 161 | |
| 162 | if (inh_flags & X509_VP_FLAG_DEFAULT) |
| 163 | to_default = 1; |
| 164 | else |
| 165 | to_default = 0; |
| 166 | |
| 167 | if (inh_flags & X509_VP_FLAG_OVERWRITE) |
| 168 | to_overwrite = 1; |
| 169 | else |
| 170 | to_overwrite = 0; |
| 171 | |
| 172 | x509_verify_param_copy(purpose, 0); |
| 173 | x509_verify_param_copy(trust, 0); |
| 174 | x509_verify_param_copy(depth, -1); |
| 175 | |
| 176 | /* If overwrite or check time not set, copy across */ |
| 177 | |
| 178 | if (to_overwrite || !(dest->flags & X509_V_FLAG_USE_CHECK_TIME)) |
| 179 | { |
| 180 | dest->check_time = src->check_time; |
| 181 | dest->flags &= ~X509_V_FLAG_USE_CHECK_TIME; |
| 182 | /* Don't need to copy flag: that is done below */ |
| 183 | } |
| 184 | |
| 185 | if (inh_flags & X509_VP_FLAG_RESET_FLAGS) |
| 186 | dest->flags = 0; |
| 187 | |
| 188 | dest->flags |= src->flags; |
| 189 | |
| 190 | if (test_x509_verify_param_copy(policies, NULL)) |
| 191 | { |
| 192 | if (!X509_VERIFY_PARAM_set1_policies(dest, src->policies)) |
| 193 | return 0; |
| 194 | } |
| 195 | |
| 196 | return 1; |
| 197 | } |
| 198 | |
| 199 | int X509_VERIFY_PARAM_set1(X509_VERIFY_PARAM *to, |
| 200 | const X509_VERIFY_PARAM *from) |
| 201 | { |
| 202 | unsigned long save_flags = to->inh_flags; |
| 203 | int ret; |
| 204 | to->inh_flags |= X509_VP_FLAG_DEFAULT; |
| 205 | ret = X509_VERIFY_PARAM_inherit(to, from); |
| 206 | to->inh_flags = save_flags; |
| 207 | return ret; |
| 208 | } |
| 209 | |
| 210 | int X509_VERIFY_PARAM_set1_name(X509_VERIFY_PARAM *param, const char *name) |
| 211 | { |
| 212 | if (param->name) |
| 213 | OPENSSL_free(param->name); |
| 214 | param->name = BUF_strdup(name); |
| 215 | if (param->name) |
| 216 | return 1; |
| 217 | return 0; |
| 218 | } |
| 219 | |
| 220 | int X509_VERIFY_PARAM_set_flags(X509_VERIFY_PARAM *param, unsigned long flags) |
| 221 | { |
| 222 | param->flags |= flags; |
| 223 | if (flags & X509_V_FLAG_POLICY_MASK) |
| 224 | param->flags |= X509_V_FLAG_POLICY_CHECK; |
| 225 | return 1; |
| 226 | } |
| 227 | |
| 228 | int X509_VERIFY_PARAM_clear_flags(X509_VERIFY_PARAM *param, unsigned long flags) |
| 229 | { |
| 230 | param->flags &= ~flags; |
| 231 | return 1; |
| 232 | } |
| 233 | |
| 234 | unsigned long X509_VERIFY_PARAM_get_flags(X509_VERIFY_PARAM *param) |
| 235 | { |
| 236 | return param->flags; |
| 237 | } |
| 238 | |
| 239 | int X509_VERIFY_PARAM_set_purpose(X509_VERIFY_PARAM *param, int purpose) |
| 240 | { |
| 241 | return X509_PURPOSE_set(¶m->purpose, purpose); |
| 242 | } |
| 243 | |
| 244 | int X509_VERIFY_PARAM_set_trust(X509_VERIFY_PARAM *param, int trust) |
| 245 | { |
| 246 | return X509_TRUST_set(¶m->trust, trust); |
| 247 | } |
| 248 | |
| 249 | void X509_VERIFY_PARAM_set_depth(X509_VERIFY_PARAM *param, int depth) |
| 250 | { |
| 251 | param->depth = depth; |
| 252 | } |
| 253 | |
| 254 | void X509_VERIFY_PARAM_set_time(X509_VERIFY_PARAM *param, time_t t) |
| 255 | { |
| 256 | param->check_time = t; |
| 257 | param->flags |= X509_V_FLAG_USE_CHECK_TIME; |
| 258 | } |
| 259 | |
| 260 | int X509_VERIFY_PARAM_add0_policy(X509_VERIFY_PARAM *param, ASN1_OBJECT *policy) |
| 261 | { |
| 262 | if (!param->policies) |
| 263 | { |
| 264 | param->policies = sk_ASN1_OBJECT_new_null(); |
| 265 | if (!param->policies) |
| 266 | return 0; |
| 267 | } |
| 268 | if (!sk_ASN1_OBJECT_push(param->policies, policy)) |
| 269 | return 0; |
| 270 | return 1; |
| 271 | } |
| 272 | |
| 273 | int X509_VERIFY_PARAM_set1_policies(X509_VERIFY_PARAM *param, |
| 274 | STACK_OF(ASN1_OBJECT) *policies) |
| 275 | { |
| 276 | int i; |
| 277 | ASN1_OBJECT *oid, *doid; |
| 278 | if (!param) |
| 279 | return 0; |
| 280 | if (param->policies) |
| 281 | sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free); |
| 282 | |
| 283 | if (!policies) |
| 284 | { |
| 285 | param->policies = NULL; |
| 286 | return 1; |
| 287 | } |
| 288 | |
| 289 | param->policies = sk_ASN1_OBJECT_new_null(); |
| 290 | if (!param->policies) |
| 291 | return 0; |
| 292 | |
| 293 | for (i = 0; i < sk_ASN1_OBJECT_num(policies); i++) |
| 294 | { |
| 295 | oid = sk_ASN1_OBJECT_value(policies, i); |
| 296 | doid = OBJ_dup(oid); |
| 297 | if (!doid) |
| 298 | return 0; |
| 299 | if (!sk_ASN1_OBJECT_push(param->policies, doid)) |
| 300 | { |
| 301 | ASN1_OBJECT_free(doid); |
| 302 | return 0; |
| 303 | } |
| 304 | } |
| 305 | param->flags |= X509_V_FLAG_POLICY_CHECK; |
| 306 | return 1; |
| 307 | } |
| 308 | |
| 309 | int X509_VERIFY_PARAM_get_depth(const X509_VERIFY_PARAM *param) |
| 310 | { |
| 311 | return param->depth; |
| 312 | } |
| 313 | |
| 314 | /* Default verify parameters: these are used for various |
| 315 | * applications and can be overridden by the user specified table. |
| 316 | * NB: the 'name' field *must* be in alphabetical order because it |
| 317 | * will be searched using OBJ_search. |
| 318 | */ |
| 319 | |
| 320 | static const X509_VERIFY_PARAM default_table[] = { |
| 321 | { |
| 322 | "default", /* X509 default parameters */ |
| 323 | 0, /* Check time */ |
| 324 | 0, /* internal flags */ |
| 325 | 0, /* flags */ |
| 326 | 0, /* purpose */ |
| 327 | 0, /* trust */ |
| 328 | 100, /* depth */ |
| 329 | NULL /* policies */ |
| 330 | }, |
| 331 | { |
| 332 | "pkcs7", /* S/MIME sign parameters */ |
| 333 | 0, /* Check time */ |
| 334 | 0, /* internal flags */ |
| 335 | 0, /* flags */ |
| 336 | X509_PURPOSE_SMIME_SIGN, /* purpose */ |
| 337 | X509_TRUST_EMAIL, /* trust */ |
| 338 | -1, /* depth */ |
| 339 | NULL /* policies */ |
| 340 | }, |
| 341 | { |
| 342 | "smime_sign", /* S/MIME sign parameters */ |
| 343 | 0, /* Check time */ |
| 344 | 0, /* internal flags */ |
| 345 | 0, /* flags */ |
| 346 | X509_PURPOSE_SMIME_SIGN, /* purpose */ |
| 347 | X509_TRUST_EMAIL, /* trust */ |
| 348 | -1, /* depth */ |
| 349 | NULL /* policies */ |
| 350 | }, |
| 351 | { |
| 352 | "ssl_client", /* SSL/TLS client parameters */ |
| 353 | 0, /* Check time */ |
| 354 | 0, /* internal flags */ |
| 355 | 0, /* flags */ |
| 356 | X509_PURPOSE_SSL_CLIENT, /* purpose */ |
| 357 | X509_TRUST_SSL_CLIENT, /* trust */ |
| 358 | -1, /* depth */ |
| 359 | NULL /* policies */ |
| 360 | }, |
| 361 | { |
| 362 | "ssl_server", /* SSL/TLS server parameters */ |
| 363 | 0, /* Check time */ |
| 364 | 0, /* internal flags */ |
| 365 | 0, /* flags */ |
| 366 | X509_PURPOSE_SSL_SERVER, /* purpose */ |
| 367 | X509_TRUST_SSL_SERVER, /* trust */ |
| 368 | -1, /* depth */ |
| 369 | NULL /* policies */ |
| 370 | }}; |
| 371 | |
| 372 | static STACK_OF(X509_VERIFY_PARAM) *param_table = NULL; |
| 373 | |
| 374 | static int table_cmp(const X509_VERIFY_PARAM *a, const X509_VERIFY_PARAM *b) |
| 375 | |
| 376 | { |
| 377 | return strcmp(a->name, b->name); |
| 378 | } |
| 379 | |
| 380 | DECLARE_OBJ_BSEARCH_CMP_FN(X509_VERIFY_PARAM, X509_VERIFY_PARAM, |
| 381 | table); |
| 382 | IMPLEMENT_OBJ_BSEARCH_CMP_FN(X509_VERIFY_PARAM, X509_VERIFY_PARAM, |
| 383 | table); |
| 384 | |
| 385 | static int param_cmp(const X509_VERIFY_PARAM * const *a, |
| 386 | const X509_VERIFY_PARAM * const *b) |
| 387 | { |
| 388 | return strcmp((*a)->name, (*b)->name); |
| 389 | } |
| 390 | |
| 391 | int X509_VERIFY_PARAM_add0_table(X509_VERIFY_PARAM *param) |
| 392 | { |
| 393 | int idx; |
| 394 | X509_VERIFY_PARAM *ptmp; |
| 395 | if (!param_table) |
| 396 | { |
| 397 | param_table = sk_X509_VERIFY_PARAM_new(param_cmp); |
| 398 | if (!param_table) |
| 399 | return 0; |
| 400 | } |
| 401 | else |
| 402 | { |
| 403 | idx = sk_X509_VERIFY_PARAM_find(param_table, param); |
| 404 | if (idx != -1) |
| 405 | { |
| 406 | ptmp = sk_X509_VERIFY_PARAM_value(param_table, idx); |
| 407 | X509_VERIFY_PARAM_free(ptmp); |
| 408 | (void)sk_X509_VERIFY_PARAM_delete(param_table, idx); |
| 409 | } |
| 410 | } |
| 411 | if (!sk_X509_VERIFY_PARAM_push(param_table, param)) |
| 412 | return 0; |
| 413 | return 1; |
| 414 | } |
| 415 | |
| 416 | const X509_VERIFY_PARAM *X509_VERIFY_PARAM_lookup(const char *name) |
| 417 | { |
| 418 | int idx; |
| 419 | X509_VERIFY_PARAM pm; |
| 420 | |
| 421 | pm.name = (char *)name; |
| 422 | if (param_table) |
| 423 | { |
| 424 | idx = sk_X509_VERIFY_PARAM_find(param_table, &pm); |
| 425 | if (idx != -1) |
| 426 | return sk_X509_VERIFY_PARAM_value(param_table, idx); |
| 427 | } |
| 428 | return OBJ_bsearch_table(&pm, default_table, |
| 429 | sizeof(default_table)/sizeof(X509_VERIFY_PARAM)); |
| 430 | } |
| 431 | |
| 432 | void X509_VERIFY_PARAM_table_cleanup(void) |
| 433 | { |
| 434 | if (param_table) |
| 435 | sk_X509_VERIFY_PARAM_pop_free(param_table, |
| 436 | X509_VERIFY_PARAM_free); |
| 437 | param_table = NULL; |
| 438 | } |