1 /* x509_vpm.c */ 2 /* Written by Dr Stephen N Henson (steve (at) 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 (at) 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 (at) cryptsoft.com). This product includes software written by Tim 55 * Hudson (tjh (at) 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 } 439
