x509_vpm.c revision 296341
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 if (param == NULL) 104 return; 105 x509_verify_param_zero(param); 106 OPENSSL_free(param); 107} 108 109/*- 110 * This function determines how parameters are "inherited" from one structure 111 * to another. There are several different ways this can happen. 112 * 113 * 1. If a child structure needs to have its values initialized from a parent 114 * they are simply copied across. For example SSL_CTX copied to SSL. 115 * 2. If the structure should take on values only if they are currently unset. 116 * For example the values in an SSL structure will take appropriate value 117 * for SSL servers or clients but only if the application has not set new 118 * ones. 119 * 120 * The "inh_flags" field determines how this function behaves. 121 * 122 * Normally any values which are set in the default are not copied from the 123 * destination and verify flags are ORed together. 124 * 125 * If X509_VP_FLAG_DEFAULT is set then anything set in the source is copied 126 * to the destination. Effectively the values in "to" become default values 127 * which will be used only if nothing new is set in "from". 128 * 129 * If X509_VP_FLAG_OVERWRITE is set then all value are copied across whether 130 * they are set or not. Flags is still Ored though. 131 * 132 * If X509_VP_FLAG_RESET_FLAGS is set then the flags value is copied instead 133 * of ORed. 134 * 135 * If X509_VP_FLAG_LOCKED is set then no values are copied. 136 * 137 * If X509_VP_FLAG_ONCE is set then the current inh_flags setting is zeroed 138 * after the next call. 139 */ 140 141/* Macro to test if a field should be copied from src to dest */ 142 143#define test_x509_verify_param_copy(field, def) \ 144 (to_overwrite || \ 145 ((src->field != def) && (to_default || (dest->field == def)))) 146 147/* Macro to test and copy a field if necessary */ 148 149#define x509_verify_param_copy(field, def) \ 150 if (test_x509_verify_param_copy(field, def)) \ 151 dest->field = src->field 152 153int X509_VERIFY_PARAM_inherit(X509_VERIFY_PARAM *dest, 154 const X509_VERIFY_PARAM *src) 155{ 156 unsigned long inh_flags; 157 int to_default, to_overwrite; 158 if (!src) 159 return 1; 160 inh_flags = dest->inh_flags | src->inh_flags; 161 162 if (inh_flags & X509_VP_FLAG_ONCE) 163 dest->inh_flags = 0; 164 165 if (inh_flags & X509_VP_FLAG_LOCKED) 166 return 1; 167 168 if (inh_flags & X509_VP_FLAG_DEFAULT) 169 to_default = 1; 170 else 171 to_default = 0; 172 173 if (inh_flags & X509_VP_FLAG_OVERWRITE) 174 to_overwrite = 1; 175 else 176 to_overwrite = 0; 177 178 x509_verify_param_copy(purpose, 0); 179 x509_verify_param_copy(trust, 0); 180 x509_verify_param_copy(depth, -1); 181 182 /* If overwrite or check time not set, copy across */ 183 184 if (to_overwrite || !(dest->flags & X509_V_FLAG_USE_CHECK_TIME)) { 185 dest->check_time = src->check_time; 186 dest->flags &= ~X509_V_FLAG_USE_CHECK_TIME; 187 /* Don't need to copy flag: that is done below */ 188 } 189 190 if (inh_flags & X509_VP_FLAG_RESET_FLAGS) 191 dest->flags = 0; 192 193 dest->flags |= src->flags; 194 195 if (test_x509_verify_param_copy(policies, NULL)) { 196 if (!X509_VERIFY_PARAM_set1_policies(dest, src->policies)) 197 return 0; 198 } 199 200 return 1; 201} 202 203int X509_VERIFY_PARAM_set1(X509_VERIFY_PARAM *to, 204 const X509_VERIFY_PARAM *from) 205{ 206 unsigned long save_flags = to->inh_flags; 207 int ret; 208 to->inh_flags |= X509_VP_FLAG_DEFAULT; 209 ret = X509_VERIFY_PARAM_inherit(to, from); 210 to->inh_flags = save_flags; 211 return ret; 212} 213 214int X509_VERIFY_PARAM_set1_name(X509_VERIFY_PARAM *param, const char *name) 215{ 216 if (param->name) 217 OPENSSL_free(param->name); 218 param->name = BUF_strdup(name); 219 if (param->name) 220 return 1; 221 return 0; 222} 223 224int X509_VERIFY_PARAM_set_flags(X509_VERIFY_PARAM *param, unsigned long flags) 225{ 226 param->flags |= flags; 227 if (flags & X509_V_FLAG_POLICY_MASK) 228 param->flags |= X509_V_FLAG_POLICY_CHECK; 229 return 1; 230} 231 232int X509_VERIFY_PARAM_clear_flags(X509_VERIFY_PARAM *param, 233 unsigned long flags) 234{ 235 param->flags &= ~flags; 236 return 1; 237} 238 239unsigned long X509_VERIFY_PARAM_get_flags(X509_VERIFY_PARAM *param) 240{ 241 return param->flags; 242} 243 244int X509_VERIFY_PARAM_set_purpose(X509_VERIFY_PARAM *param, int purpose) 245{ 246 return X509_PURPOSE_set(¶m->purpose, purpose); 247} 248 249int X509_VERIFY_PARAM_set_trust(X509_VERIFY_PARAM *param, int trust) 250{ 251 return X509_TRUST_set(¶m->trust, trust); 252} 253 254void X509_VERIFY_PARAM_set_depth(X509_VERIFY_PARAM *param, int depth) 255{ 256 param->depth = depth; 257} 258 259void X509_VERIFY_PARAM_set_time(X509_VERIFY_PARAM *param, time_t t) 260{ 261 param->check_time = t; 262 param->flags |= X509_V_FLAG_USE_CHECK_TIME; 263} 264 265int X509_VERIFY_PARAM_add0_policy(X509_VERIFY_PARAM *param, 266 ASN1_OBJECT *policy) 267{ 268 if (!param->policies) { 269 param->policies = sk_ASN1_OBJECT_new_null(); 270 if (!param->policies) 271 return 0; 272 } 273 if (!sk_ASN1_OBJECT_push(param->policies, policy)) 274 return 0; 275 return 1; 276} 277 278int X509_VERIFY_PARAM_set1_policies(X509_VERIFY_PARAM *param, 279 STACK_OF(ASN1_OBJECT) *policies) 280{ 281 int i; 282 ASN1_OBJECT *oid, *doid; 283 if (!param) 284 return 0; 285 if (param->policies) 286 sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free); 287 288 if (!policies) { 289 param->policies = NULL; 290 return 1; 291 } 292 293 param->policies = sk_ASN1_OBJECT_new_null(); 294 if (!param->policies) 295 return 0; 296 297 for (i = 0; i < sk_ASN1_OBJECT_num(policies); i++) { 298 oid = sk_ASN1_OBJECT_value(policies, i); 299 doid = OBJ_dup(oid); 300 if (!doid) 301 return 0; 302 if (!sk_ASN1_OBJECT_push(param->policies, doid)) { 303 ASN1_OBJECT_free(doid); 304 return 0; 305 } 306 } 307 param->flags |= X509_V_FLAG_POLICY_CHECK; 308 return 1; 309} 310 311int X509_VERIFY_PARAM_get_depth(const X509_VERIFY_PARAM *param) 312{ 313 return param->depth; 314} 315 316/* 317 * Default verify parameters: these are used for various applications and can 318 * be overridden by the user specified table. NB: the 'name' field *must* be 319 * in alphabetical order because it will be searched using OBJ_search. 320 */ 321 322static const X509_VERIFY_PARAM default_table[] = { 323 { 324 "default", /* X509 default parameters */ 325 0, /* Check time */ 326 0, /* internal flags */ 327 0, /* flags */ 328 0, /* purpose */ 329 0, /* trust */ 330 100, /* depth */ 331 NULL /* policies */ 332 }, 333 { 334 "pkcs7", /* S/MIME sign parameters */ 335 0, /* Check time */ 336 0, /* internal flags */ 337 0, /* flags */ 338 X509_PURPOSE_SMIME_SIGN, /* purpose */ 339 X509_TRUST_EMAIL, /* trust */ 340 -1, /* depth */ 341 NULL /* policies */ 342 }, 343 { 344 "smime_sign", /* S/MIME sign parameters */ 345 0, /* Check time */ 346 0, /* internal flags */ 347 0, /* flags */ 348 X509_PURPOSE_SMIME_SIGN, /* purpose */ 349 X509_TRUST_EMAIL, /* trust */ 350 -1, /* depth */ 351 NULL /* policies */ 352 }, 353 { 354 "ssl_client", /* SSL/TLS client parameters */ 355 0, /* Check time */ 356 0, /* internal flags */ 357 0, /* flags */ 358 X509_PURPOSE_SSL_CLIENT, /* purpose */ 359 X509_TRUST_SSL_CLIENT, /* trust */ 360 -1, /* depth */ 361 NULL /* policies */ 362 }, 363 { 364 "ssl_server", /* SSL/TLS server parameters */ 365 0, /* Check time */ 366 0, /* internal flags */ 367 0, /* flags */ 368 X509_PURPOSE_SSL_SERVER, /* purpose */ 369 X509_TRUST_SSL_SERVER, /* trust */ 370 -1, /* depth */ 371 NULL /* policies */ 372 } 373}; 374 375static STACK_OF(X509_VERIFY_PARAM) *param_table = NULL; 376 377static int table_cmp(const X509_VERIFY_PARAM *a, const X509_VERIFY_PARAM *b) 378{ 379 return strcmp(a->name, b->name); 380} 381 382DECLARE_OBJ_BSEARCH_CMP_FN(X509_VERIFY_PARAM, X509_VERIFY_PARAM, table); 383IMPLEMENT_OBJ_BSEARCH_CMP_FN(X509_VERIFY_PARAM, X509_VERIFY_PARAM, table); 384 385static 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 391int X509_VERIFY_PARAM_add0_table(X509_VERIFY_PARAM *param) 392{ 393 int idx; 394 X509_VERIFY_PARAM *ptmp; 395 if (!param_table) { 396 param_table = sk_X509_VERIFY_PARAM_new(param_cmp); 397 if (!param_table) 398 return 0; 399 } else { 400 idx = sk_X509_VERIFY_PARAM_find(param_table, param); 401 if (idx != -1) { 402 ptmp = sk_X509_VERIFY_PARAM_value(param_table, idx); 403 X509_VERIFY_PARAM_free(ptmp); 404 (void)sk_X509_VERIFY_PARAM_delete(param_table, idx); 405 } 406 } 407 if (!sk_X509_VERIFY_PARAM_push(param_table, param)) 408 return 0; 409 return 1; 410} 411 412const X509_VERIFY_PARAM *X509_VERIFY_PARAM_lookup(const char *name) 413{ 414 int idx; 415 X509_VERIFY_PARAM pm; 416 417 pm.name = (char *)name; 418 if (param_table) { 419 idx = sk_X509_VERIFY_PARAM_find(param_table, &pm); 420 if (idx != -1) 421 return sk_X509_VERIFY_PARAM_value(param_table, idx); 422 } 423 return OBJ_bsearch_table(&pm, default_table, 424 sizeof(default_table) / 425 sizeof(X509_VERIFY_PARAM)); 426} 427 428void X509_VERIFY_PARAM_table_cleanup(void) 429{ 430 if (param_table) 431 sk_X509_VERIFY_PARAM_pop_free(param_table, X509_VERIFY_PARAM_free); 432 param_table = NULL; 433} 434