x509_vpm.c revision 280304
1/* x509_vpm.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 <stdio.h> 61 62#include "cryptlib.h" 63#include <openssl/crypto.h> 64#include <openssl/lhash.h> 65#include <openssl/buffer.h> 66#include <openssl/x509.h> 67#include <openssl/x509v3.h> 68 69/* X509_VERIFY_PARAM functions */ 70 71static void x509_verify_param_zero(X509_VERIFY_PARAM *param) 72{ 73 if (!param) 74 return; 75 param->name = NULL; 76 param->purpose = 0; 77 param->trust = 0; 78 /* 79 * param->inh_flags = X509_VP_FLAG_DEFAULT; 80 */ 81 param->inh_flags = 0; 82 param->flags = 0; 83 param->depth = -1; 84 if (param->policies) { 85 sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free); 86 param->policies = NULL; 87 } 88} 89 90X509_VERIFY_PARAM *X509_VERIFY_PARAM_new(void) 91{ 92 X509_VERIFY_PARAM *param; 93 param = OPENSSL_malloc(sizeof(X509_VERIFY_PARAM)); 94 if (!param) 95 return NULL; 96 memset(param, 0, sizeof(X509_VERIFY_PARAM)); 97 x509_verify_param_zero(param); 98 return param; 99} 100 101void X509_VERIFY_PARAM_free(X509_VERIFY_PARAM *param) 102{ 103 x509_verify_param_zero(param); 104 OPENSSL_free(param); 105} 106 107/*- 108 * This function determines how parameters are "inherited" from one structure 109 * to another. There are several different ways this can happen. 110 * 111 * 1. If a child structure needs to have its values initialized from a parent 112 * they are simply copied across. For example SSL_CTX copied to SSL. 113 * 2. If the structure should take on values only if they are currently unset. 114 * For example the values in an SSL structure will take appropriate value 115 * for SSL servers or clients but only if the application has not set new 116 * ones. 117 * 118 * The "inh_flags" field determines how this function behaves. 119 * 120 * Normally any values which are set in the default are not copied from the 121 * destination and verify flags are ORed together. 122 * 123 * If X509_VP_FLAG_DEFAULT is set then anything set in the source is copied 124 * to the destination. Effectively the values in "to" become default values 125 * which will be used only if nothing new is set in "from". 126 * 127 * If X509_VP_FLAG_OVERWRITE is set then all value are copied across whether 128 * they are set or not. Flags is still Ored though. 129 * 130 * If X509_VP_FLAG_RESET_FLAGS is set then the flags value is copied instead 131 * of ORed. 132 * 133 * If X509_VP_FLAG_LOCKED is set then no values are copied. 134 * 135 * If X509_VP_FLAG_ONCE is set then the current inh_flags setting is zeroed 136 * after the next call. 137 */ 138 139/* Macro to test if a field should be copied from src to dest */ 140 141#define test_x509_verify_param_copy(field, def) \ 142 (to_overwrite || \ 143 ((src->field != def) && (to_default || (dest->field == def)))) 144 145/* Macro to test and copy a field if necessary */ 146 147#define x509_verify_param_copy(field, def) \ 148 if (test_x509_verify_param_copy(field, def)) \ 149 dest->field = src->field 150 151int X509_VERIFY_PARAM_inherit(X509_VERIFY_PARAM *dest, 152 const X509_VERIFY_PARAM *src) 153{ 154 unsigned long inh_flags; 155 int to_default, to_overwrite; 156 if (!src) 157 return 1; 158 inh_flags = dest->inh_flags | src->inh_flags; 159 160 if (inh_flags & X509_VP_FLAG_ONCE) 161 dest->inh_flags = 0; 162 163 if (inh_flags & X509_VP_FLAG_LOCKED) 164 return 1; 165 166 if (inh_flags & X509_VP_FLAG_DEFAULT) 167 to_default = 1; 168 else 169 to_default = 0; 170 171 if (inh_flags & X509_VP_FLAG_OVERWRITE) 172 to_overwrite = 1; 173 else 174 to_overwrite = 0; 175 176 x509_verify_param_copy(purpose, 0); 177 x509_verify_param_copy(trust, 0); 178 x509_verify_param_copy(depth, -1); 179 180 /* If overwrite or check time not set, copy across */ 181 182 if (to_overwrite || !(dest->flags & X509_V_FLAG_USE_CHECK_TIME)) { 183 dest->check_time = src->check_time; 184 dest->flags &= ~X509_V_FLAG_USE_CHECK_TIME; 185 /* Don't need to copy flag: that is done below */ 186 } 187 188 if (inh_flags & X509_VP_FLAG_RESET_FLAGS) 189 dest->flags = 0; 190 191 dest->flags |= src->flags; 192 193 if (test_x509_verify_param_copy(policies, NULL)) { 194 if (!X509_VERIFY_PARAM_set1_policies(dest, src->policies)) 195 return 0; 196 } 197 198 return 1; 199} 200 201int X509_VERIFY_PARAM_set1(X509_VERIFY_PARAM *to, 202 const X509_VERIFY_PARAM *from) 203{ 204 unsigned long save_flags = to->inh_flags; 205 int ret; 206 to->inh_flags |= X509_VP_FLAG_DEFAULT; 207 ret = X509_VERIFY_PARAM_inherit(to, from); 208 to->inh_flags = save_flags; 209 return ret; 210} 211 212int X509_VERIFY_PARAM_set1_name(X509_VERIFY_PARAM *param, const char *name) 213{ 214 if (param->name) 215 OPENSSL_free(param->name); 216 param->name = BUF_strdup(name); 217 if (param->name) 218 return 1; 219 return 0; 220} 221 222int X509_VERIFY_PARAM_set_flags(X509_VERIFY_PARAM *param, unsigned long flags) 223{ 224 param->flags |= flags; 225 if (flags & X509_V_FLAG_POLICY_MASK) 226 param->flags |= X509_V_FLAG_POLICY_CHECK; 227 return 1; 228} 229 230int X509_VERIFY_PARAM_clear_flags(X509_VERIFY_PARAM *param, 231 unsigned long flags) 232{ 233 param->flags &= ~flags; 234 return 1; 235} 236 237unsigned long X509_VERIFY_PARAM_get_flags(X509_VERIFY_PARAM *param) 238{ 239 return param->flags; 240} 241 242int X509_VERIFY_PARAM_set_purpose(X509_VERIFY_PARAM *param, int purpose) 243{ 244 return X509_PURPOSE_set(¶m->purpose, purpose); 245} 246 247int X509_VERIFY_PARAM_set_trust(X509_VERIFY_PARAM *param, int trust) 248{ 249 return X509_TRUST_set(¶m->trust, trust); 250} 251 252void X509_VERIFY_PARAM_set_depth(X509_VERIFY_PARAM *param, int depth) 253{ 254 param->depth = depth; 255} 256 257void X509_VERIFY_PARAM_set_time(X509_VERIFY_PARAM *param, time_t t) 258{ 259 param->check_time = t; 260 param->flags |= X509_V_FLAG_USE_CHECK_TIME; 261} 262 263int X509_VERIFY_PARAM_add0_policy(X509_VERIFY_PARAM *param, 264 ASN1_OBJECT *policy) 265{ 266 if (!param->policies) { 267 param->policies = sk_ASN1_OBJECT_new_null(); 268 if (!param->policies) 269 return 0; 270 } 271 if (!sk_ASN1_OBJECT_push(param->policies, policy)) 272 return 0; 273 return 1; 274} 275 276int X509_VERIFY_PARAM_set1_policies(X509_VERIFY_PARAM *param, 277 STACK_OF(ASN1_OBJECT) *policies) 278{ 279 int i; 280 ASN1_OBJECT *oid, *doid; 281 if (!param) 282 return 0; 283 if (param->policies) 284 sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free); 285 286 if (!policies) { 287 param->policies = NULL; 288 return 1; 289 } 290 291 param->policies = sk_ASN1_OBJECT_new_null(); 292 if (!param->policies) 293 return 0; 294 295 for (i = 0; i < sk_ASN1_OBJECT_num(policies); i++) { 296 oid = sk_ASN1_OBJECT_value(policies, i); 297 doid = OBJ_dup(oid); 298 if (!doid) 299 return 0; 300 if (!sk_ASN1_OBJECT_push(param->policies, doid)) { 301 ASN1_OBJECT_free(doid); 302 return 0; 303 } 304 } 305 param->flags |= X509_V_FLAG_POLICY_CHECK; 306 return 1; 307} 308 309int X509_VERIFY_PARAM_get_depth(const X509_VERIFY_PARAM *param) 310{ 311 return param->depth; 312} 313 314/* 315 * Default verify parameters: these are used for various applications and can 316 * be overridden by the user specified table. NB: the 'name' field *must* be 317 * in alphabetical order because it will be searched using OBJ_search. 318 */ 319 320static 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 373static STACK_OF(X509_VERIFY_PARAM) *param_table = NULL; 374 375static int table_cmp(const X509_VERIFY_PARAM *a, const X509_VERIFY_PARAM *b) 376{ 377 return strcmp(a->name, b->name); 378} 379 380DECLARE_OBJ_BSEARCH_CMP_FN(X509_VERIFY_PARAM, X509_VERIFY_PARAM, table); 381IMPLEMENT_OBJ_BSEARCH_CMP_FN(X509_VERIFY_PARAM, X509_VERIFY_PARAM, table); 382 383static int param_cmp(const X509_VERIFY_PARAM *const *a, 384 const X509_VERIFY_PARAM *const *b) 385{ 386 return strcmp((*a)->name, (*b)->name); 387} 388 389int X509_VERIFY_PARAM_add0_table(X509_VERIFY_PARAM *param) 390{ 391 int idx; 392 X509_VERIFY_PARAM *ptmp; 393 if (!param_table) { 394 param_table = sk_X509_VERIFY_PARAM_new(param_cmp); 395 if (!param_table) 396 return 0; 397 } else { 398 idx = sk_X509_VERIFY_PARAM_find(param_table, param); 399 if (idx != -1) { 400 ptmp = sk_X509_VERIFY_PARAM_value(param_table, idx); 401 X509_VERIFY_PARAM_free(ptmp); 402 (void)sk_X509_VERIFY_PARAM_delete(param_table, idx); 403 } 404 } 405 if (!sk_X509_VERIFY_PARAM_push(param_table, param)) 406 return 0; 407 return 1; 408} 409 410const X509_VERIFY_PARAM *X509_VERIFY_PARAM_lookup(const char *name) 411{ 412 int idx; 413 X509_VERIFY_PARAM pm; 414 415 pm.name = (char *)name; 416 if (param_table) { 417 idx = sk_X509_VERIFY_PARAM_find(param_table, &pm); 418 if (idx != -1) 419 return sk_X509_VERIFY_PARAM_value(param_table, idx); 420 } 421 return OBJ_bsearch_table(&pm, default_table, 422 sizeof(default_table) / 423 sizeof(X509_VERIFY_PARAM)); 424} 425 426void X509_VERIFY_PARAM_table_cleanup(void) 427{ 428 if (param_table) 429 sk_X509_VERIFY_PARAM_pop_free(param_table, X509_VERIFY_PARAM_free); 430 param_table = NULL; 431} 432