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 70static 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 88X509_VERIFY_PARAM *X509_VERIFY_PARAM_new(void) 89 { 90 X509_VERIFY_PARAM *param; 91 param = OPENSSL_malloc(sizeof(X509_VERIFY_PARAM)); 92 if (!param) 93 return NULL; 94 memset(param, 0, sizeof(X509_VERIFY_PARAM)); 95 x509_verify_param_zero(param); 96 return param; 97 } 98 99void X509_VERIFY_PARAM_free(X509_VERIFY_PARAM *param) 100 { 101 x509_verify_param_zero(param); 102 OPENSSL_free(param); 103 } 104 105/* This function determines how parameters are "inherited" from one structure 106 * to another. There are several different ways this can happen. 107 * 108 * 1. If a child structure needs to have its values initialized from a parent 109 * they are simply copied across. For example SSL_CTX copied to SSL. 110 * 2. If the structure should take on values only if they are currently unset. 111 * For example the values in an SSL structure will take appropriate value 112 * for SSL servers or clients but only if the application has not set new 113 * ones. 114 * 115 * The "inh_flags" field determines how this function behaves. 116 * 117 * Normally any values which are set in the default are not copied from the 118 * destination and verify flags are ORed together. 119 * 120 * If X509_VP_FLAG_DEFAULT is set then anything set in the source is copied 121 * to the destination. Effectively the values in "to" become default values 122 * which will be used only if nothing new is set in "from". 123 * 124 * If X509_VP_FLAG_OVERWRITE is set then all value are copied across whether 125 * they are set or not. Flags is still Ored though. 126 * 127 * If X509_VP_FLAG_RESET_FLAGS is set then the flags value is copied instead 128 * of ORed. 129 * 130 * If X509_VP_FLAG_LOCKED is set then no values are copied. 131 * 132 * If X509_VP_FLAG_ONCE is set then the current inh_flags setting is zeroed 133 * after the next call. 134 */ 135 136/* Macro to test if a field should be copied from src to dest */ 137 138#define test_x509_verify_param_copy(field, def) \ 139 (to_overwrite || \ 140 ((src->field != def) && (to_default || (dest->field == def)))) 141 142/* Macro to test and copy a field if necessary */ 143 144#define x509_verify_param_copy(field, def) \ 145 if (test_x509_verify_param_copy(field, def)) \ 146 dest->field = src->field 147 148 149int X509_VERIFY_PARAM_inherit(X509_VERIFY_PARAM *dest, 150 const X509_VERIFY_PARAM *src) 151 { 152 unsigned long inh_flags; 153 int to_default, to_overwrite; 154 if (!src) 155 return 1; 156 inh_flags = dest->inh_flags | src->inh_flags; 157 158 if (inh_flags & X509_VP_FLAG_ONCE) 159 dest->inh_flags = 0; 160 161 if (inh_flags & X509_VP_FLAG_LOCKED) 162 return 1; 163 164 if (inh_flags & X509_VP_FLAG_DEFAULT) 165 to_default = 1; 166 else 167 to_default = 0; 168 169 if (inh_flags & X509_VP_FLAG_OVERWRITE) 170 to_overwrite = 1; 171 else 172 to_overwrite = 0; 173 174 x509_verify_param_copy(purpose, 0); 175 x509_verify_param_copy(trust, 0); 176 x509_verify_param_copy(depth, -1); 177 178 /* If overwrite or check time not set, copy across */ 179 180 if (to_overwrite || !(dest->flags & X509_V_FLAG_USE_CHECK_TIME)) 181 { 182 dest->check_time = src->check_time; 183 dest->flags &= ~X509_V_FLAG_USE_CHECK_TIME; 184 /* Don't need to copy flag: that is done below */ 185 } 186 187 if (inh_flags & X509_VP_FLAG_RESET_FLAGS) 188 dest->flags = 0; 189 190 dest->flags |= src->flags; 191 192 if (test_x509_verify_param_copy(policies, NULL)) 193 { 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, unsigned long flags) 231 { 232 param->flags &= ~flags; 233 return 1; 234 } 235 236unsigned long X509_VERIFY_PARAM_get_flags(X509_VERIFY_PARAM *param) 237 { 238 return param->flags; 239 } 240 241int X509_VERIFY_PARAM_set_purpose(X509_VERIFY_PARAM *param, int purpose) 242 { 243 return X509_PURPOSE_set(¶m->purpose, purpose); 244 } 245 246int X509_VERIFY_PARAM_set_trust(X509_VERIFY_PARAM *param, int trust) 247 { 248 return X509_TRUST_set(¶m->trust, trust); 249 } 250 251void X509_VERIFY_PARAM_set_depth(X509_VERIFY_PARAM *param, int depth) 252 { 253 param->depth = depth; 254 } 255 256void X509_VERIFY_PARAM_set_time(X509_VERIFY_PARAM *param, time_t t) 257 { 258 param->check_time = t; 259 param->flags |= X509_V_FLAG_USE_CHECK_TIME; 260 } 261 262int X509_VERIFY_PARAM_add0_policy(X509_VERIFY_PARAM *param, ASN1_OBJECT *policy) 263 { 264 if (!param->policies) 265 { 266 param->policies = sk_ASN1_OBJECT_new_null(); 267 if (!param->policies) 268 return 0; 269 } 270 if (!sk_ASN1_OBJECT_push(param->policies, policy)) 271 return 0; 272 return 1; 273 } 274 275int X509_VERIFY_PARAM_set1_policies(X509_VERIFY_PARAM *param, 276 STACK_OF(ASN1_OBJECT) *policies) 277 { 278 int i; 279 ASN1_OBJECT *oid, *doid; 280 if (!param) 281 return 0; 282 if (param->policies) 283 sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free); 284 285 if (!policies) 286 { 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 { 297 oid = sk_ASN1_OBJECT_value(policies, i); 298 doid = OBJ_dup(oid); 299 if (!doid) 300 return 0; 301 if (!sk_ASN1_OBJECT_push(param->policies, doid)) 302 { 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/* Default verify parameters: these are used for various 317 * applications and can be overridden by the user specified table. 318 * NB: the 'name' field *must* be in alphabetical order because it 319 * 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 374static STACK_OF(X509_VERIFY_PARAM) *param_table = NULL; 375 376static int table_cmp(const X509_VERIFY_PARAM *a, const X509_VERIFY_PARAM *b) 377 378 { 379 return strcmp(a->name, b->name); 380 } 381 382DECLARE_OBJ_BSEARCH_CMP_FN(X509_VERIFY_PARAM, X509_VERIFY_PARAM, 383 table); 384IMPLEMENT_OBJ_BSEARCH_CMP_FN(X509_VERIFY_PARAM, X509_VERIFY_PARAM, 385 table); 386 387static int param_cmp(const X509_VERIFY_PARAM * const *a, 388 const X509_VERIFY_PARAM * const *b) 389 { 390 return strcmp((*a)->name, (*b)->name); 391 } 392 393int X509_VERIFY_PARAM_add0_table(X509_VERIFY_PARAM *param) 394 { 395 int idx; 396 X509_VERIFY_PARAM *ptmp; 397 if (!param_table) 398 { 399 param_table = sk_X509_VERIFY_PARAM_new(param_cmp); 400 if (!param_table) 401 return 0; 402 } 403 else 404 { 405 idx = sk_X509_VERIFY_PARAM_find(param_table, param); 406 if (idx != -1) 407 { 408 ptmp = sk_X509_VERIFY_PARAM_value(param_table, idx); 409 X509_VERIFY_PARAM_free(ptmp); 410 (void)sk_X509_VERIFY_PARAM_delete(param_table, idx); 411 } 412 } 413 if (!sk_X509_VERIFY_PARAM_push(param_table, param)) 414 return 0; 415 return 1; 416 } 417 418const X509_VERIFY_PARAM *X509_VERIFY_PARAM_lookup(const char *name) 419 { 420 int idx; 421 X509_VERIFY_PARAM pm; 422 423 pm.name = (char *)name; 424 if (param_table) 425 { 426 idx = sk_X509_VERIFY_PARAM_find(param_table, &pm); 427 if (idx != -1) 428 return sk_X509_VERIFY_PARAM_value(param_table, idx); 429 } 430 return OBJ_bsearch_table(&pm, default_table, 431 sizeof(default_table)/sizeof(X509_VERIFY_PARAM)); 432 } 433 434void X509_VERIFY_PARAM_table_cleanup(void) 435 { 436 if (param_table) 437 sk_X509_VERIFY_PARAM_pop_free(param_table, 438 X509_VERIFY_PARAM_free); 439 param_table = NULL; 440 } 441