1/* x509_vpm.c */ 2/* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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->flags = 0; 79 param->depth = -1; 80 if (param->policies) 81 { 82 sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free); 83 param->policies = NULL; 84 } 85 } 86 87X509_VERIFY_PARAM *X509_VERIFY_PARAM_new(void) 88 { 89 X509_VERIFY_PARAM *param; 90 param = OPENSSL_malloc(sizeof(X509_VERIFY_PARAM)); 91 memset(param, 0, sizeof(X509_VERIFY_PARAM)); 92 x509_verify_param_zero(param); 93 return param; 94 } 95 96void X509_VERIFY_PARAM_free(X509_VERIFY_PARAM *param) 97 { 98 x509_verify_param_zero(param); 99 OPENSSL_free(param); 100 } 101 102/* This function determines how parameters are "inherited" from one structure 103 * to another. There are several different ways this can happen. 104 * 105 * 1. If a child structure needs to have its values initialized from a parent 106 * they are simply copied across. For example SSL_CTX copied to SSL. 107 * 2. If the structure should take on values only if they are currently unset. 108 * For example the values in an SSL structure will take appropriate value 109 * for SSL servers or clients but only if the application has not set new 110 * ones. 111 * 112 * The "inh_flags" field determines how this function behaves. 113 * 114 * Normally any values which are set in the default are not copied from the 115 * destination and verify flags are ORed together. 116 * 117 * If X509_VP_FLAG_DEFAULT is set then anything set in the source is copied 118 * to the destination. Effectively the values in "to" become default values 119 * which will be used only if nothing new is set in "from". 120 * 121 * If X509_VP_FLAG_OVERWRITE is set then all value are copied across whether 122 * they are set or not. Flags is still Ored though. 123 * 124 * If X509_VP_FLAG_RESET_FLAGS is set then the flags value is copied instead 125 * of ORed. 126 * 127 * If X509_VP_FLAG_LOCKED is set then no values are copied. 128 * 129 * If X509_VP_FLAG_ONCE is set then the current inh_flags setting is zeroed 130 * after the next call. 131 */ 132 133/* Macro to test if a field should be copied from src to dest */ 134 135#define test_x509_verify_param_copy(field, def) \ 136 (to_overwrite || \ 137 ((src->field != def) && (to_default || (dest->field == def)))) 138 139/* Macro to test and copy a field if necessary */ 140 141#define x509_verify_param_copy(field, def) \ 142 if (test_x509_verify_param_copy(field, def)) \ 143 dest->field = src->field 144 145 146int X509_VERIFY_PARAM_inherit(X509_VERIFY_PARAM *dest, 147 const X509_VERIFY_PARAM *src) 148 { 149 unsigned long inh_flags; 150 int to_default, to_overwrite; 151 if (!src) 152 return 1; 153 inh_flags = dest->inh_flags | src->inh_flags; 154 155 if (inh_flags & X509_VP_FLAG_ONCE) 156 dest->inh_flags = 0; 157 158 if (inh_flags & X509_VP_FLAG_LOCKED) 159 return 1; 160 161 if (inh_flags & X509_VP_FLAG_DEFAULT) 162 to_default = 1; 163 else 164 to_default = 0; 165 166 if (inh_flags & X509_VP_FLAG_OVERWRITE) 167 to_overwrite = 1; 168 else 169 to_overwrite = 0; 170 171 x509_verify_param_copy(purpose, 0); 172 x509_verify_param_copy(trust, 0); 173 x509_verify_param_copy(depth, -1); 174 175 /* If overwrite or check time not set, copy across */ 176 177 if (to_overwrite || !(dest->flags & X509_V_FLAG_USE_CHECK_TIME)) 178 { 179 dest->check_time = src->check_time; 180 dest->flags &= ~X509_V_FLAG_USE_CHECK_TIME; 181 /* Don't need to copy flag: that is done below */ 182 } 183 184 if (inh_flags & X509_VP_FLAG_RESET_FLAGS) 185 dest->flags = 0; 186 187 dest->flags |= src->flags; 188 189 if (test_x509_verify_param_copy(policies, NULL)) 190 { 191 if (!X509_VERIFY_PARAM_set1_policies(dest, src->policies)) 192 return 0; 193 } 194 195 return 1; 196 } 197 198int X509_VERIFY_PARAM_set1(X509_VERIFY_PARAM *to, 199 const X509_VERIFY_PARAM *from) 200 { 201 to->inh_flags |= X509_VP_FLAG_DEFAULT; 202 return X509_VERIFY_PARAM_inherit(to, from); 203 } 204 205int X509_VERIFY_PARAM_set1_name(X509_VERIFY_PARAM *param, const char *name) 206 { 207 if (param->name) 208 OPENSSL_free(param->name); 209 param->name = BUF_strdup(name); 210 if (param->name) 211 return 1; 212 return 0; 213 } 214 215int X509_VERIFY_PARAM_set_flags(X509_VERIFY_PARAM *param, unsigned long flags) 216 { 217 param->flags |= flags; 218 if (flags & X509_V_FLAG_POLICY_MASK) 219 param->flags |= X509_V_FLAG_POLICY_CHECK; 220 return 1; 221 } 222 223int X509_VERIFY_PARAM_clear_flags(X509_VERIFY_PARAM *param, unsigned long flags) 224 { 225 param->flags &= ~flags; 226 return 1; 227 } 228 229unsigned long X509_VERIFY_PARAM_get_flags(X509_VERIFY_PARAM *param) 230 { 231 return param->flags; 232 } 233 234int X509_VERIFY_PARAM_set_purpose(X509_VERIFY_PARAM *param, int purpose) 235 { 236 return X509_PURPOSE_set(¶m->purpose, purpose); 237 } 238 239int X509_VERIFY_PARAM_set_trust(X509_VERIFY_PARAM *param, int trust) 240 { 241 return X509_TRUST_set(¶m->trust, trust); 242 } 243 244void X509_VERIFY_PARAM_set_depth(X509_VERIFY_PARAM *param, int depth) 245 { 246 param->depth = depth; 247 } 248 249void X509_VERIFY_PARAM_set_time(X509_VERIFY_PARAM *param, time_t t) 250 { 251 param->check_time = t; 252 param->flags |= X509_V_FLAG_USE_CHECK_TIME; 253 } 254 255int X509_VERIFY_PARAM_add0_policy(X509_VERIFY_PARAM *param, ASN1_OBJECT *policy) 256 { 257 if (!param->policies) 258 { 259 param->policies = sk_ASN1_OBJECT_new_null(); 260 if (!param->policies) 261 return 0; 262 } 263 if (!sk_ASN1_OBJECT_push(param->policies, policy)) 264 return 0; 265 return 1; 266 } 267 268int X509_VERIFY_PARAM_set1_policies(X509_VERIFY_PARAM *param, 269 STACK_OF(ASN1_OBJECT) *policies) 270 { 271 int i; 272 ASN1_OBJECT *oid, *doid; 273 if (!param) 274 return 0; 275 if (param->policies) 276 sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free); 277 278 if (!policies) 279 { 280 param->policies = NULL; 281 return 1; 282 } 283 284 param->policies = sk_ASN1_OBJECT_new_null(); 285 if (!param->policies) 286 return 0; 287 288 for (i = 0; i < sk_ASN1_OBJECT_num(policies); i++) 289 { 290 oid = sk_ASN1_OBJECT_value(policies, i); 291 doid = OBJ_dup(oid); 292 if (!doid) 293 return 0; 294 if (!sk_ASN1_OBJECT_push(param->policies, doid)) 295 { 296 ASN1_OBJECT_free(doid); 297 return 0; 298 } 299 } 300 param->flags |= X509_V_FLAG_POLICY_CHECK; 301 return 1; 302 } 303 304int X509_VERIFY_PARAM_get_depth(const X509_VERIFY_PARAM *param) 305 { 306 return param->depth; 307 } 308 309/* Default verify parameters: these are used for various 310 * applications and can be overridden by the user specified table. 311 * NB: the 'name' field *must* be in alphabetical order because it 312 * will be searched using OBJ_search. 313 */ 314 315static const X509_VERIFY_PARAM default_table[] = { 316 { 317 "default", /* X509 default parameters */ 318 0, /* Check time */ 319 0, /* internal flags */ 320 0, /* flags */ 321 0, /* purpose */ 322 0, /* trust */ 323 9, /* depth */ 324 NULL /* policies */ 325 }, 326 { 327 "pkcs7", /* SSL/TLS client parameters */ 328 0, /* Check time */ 329 0, /* internal flags */ 330 0, /* flags */ 331 X509_PURPOSE_SMIME_SIGN, /* purpose */ 332 X509_TRUST_EMAIL, /* trust */ 333 -1, /* depth */ 334 NULL /* policies */ 335 }, 336 { 337 "ssl_client", /* SSL/TLS client parameters */ 338 0, /* Check time */ 339 0, /* internal flags */ 340 0, /* flags */ 341 X509_PURPOSE_SSL_CLIENT, /* purpose */ 342 X509_TRUST_SSL_CLIENT, /* trust */ 343 -1, /* depth */ 344 NULL /* policies */ 345 }, 346 { 347 "ssl_server", /* SSL/TLS server parameters */ 348 0, /* Check time */ 349 0, /* internal flags */ 350 0, /* flags */ 351 X509_PURPOSE_SSL_SERVER, /* purpose */ 352 X509_TRUST_SSL_SERVER, /* trust */ 353 -1, /* depth */ 354 NULL /* policies */ 355 }}; 356 357static STACK_OF(X509_VERIFY_PARAM) *param_table = NULL; 358 359static int table_cmp(const void *pa, const void *pb) 360 { 361 const X509_VERIFY_PARAM *a = pa, *b = pb; 362 return strcmp(a->name, b->name); 363 } 364 365static int param_cmp(const X509_VERIFY_PARAM * const *a, 366 const X509_VERIFY_PARAM * const *b) 367 { 368 return strcmp((*a)->name, (*b)->name); 369 } 370 371int X509_VERIFY_PARAM_add0_table(X509_VERIFY_PARAM *param) 372 { 373 int idx; 374 X509_VERIFY_PARAM *ptmp; 375 if (!param_table) 376 { 377 param_table = sk_X509_VERIFY_PARAM_new(param_cmp); 378 if (!param_table) 379 return 0; 380 } 381 else 382 { 383 idx = sk_X509_VERIFY_PARAM_find(param_table, param); 384 if (idx != -1) 385 { 386 ptmp = sk_X509_VERIFY_PARAM_value(param_table, idx); 387 X509_VERIFY_PARAM_free(ptmp); 388 sk_X509_VERIFY_PARAM_delete(param_table, idx); 389 } 390 } 391 if (!sk_X509_VERIFY_PARAM_push(param_table, param)) 392 return 0; 393 return 1; 394 } 395 396const X509_VERIFY_PARAM *X509_VERIFY_PARAM_lookup(const char *name) 397 { 398 int idx; 399 X509_VERIFY_PARAM pm; 400 pm.name = (char *)name; 401 if (param_table) 402 { 403 idx = sk_X509_VERIFY_PARAM_find(param_table, &pm); 404 if (idx != -1) 405 return sk_X509_VERIFY_PARAM_value(param_table, idx); 406 } 407 return (const X509_VERIFY_PARAM *) OBJ_bsearch((char *)&pm, 408 (char *)&default_table, 409 sizeof(default_table)/sizeof(X509_VERIFY_PARAM), 410 sizeof(X509_VERIFY_PARAM), 411 table_cmp); 412 } 413 414void X509_VERIFY_PARAM_table_cleanup(void) 415 { 416 if (param_table) 417 sk_X509_VERIFY_PARAM_pop_free(param_table, 418 X509_VERIFY_PARAM_free); 419 param_table = NULL; 420 } 421