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 = 0; 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 87 X509_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 96 void 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 144 145 146 int 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 } 197 198 int X509_VERIFY_PARAM_set1(X509_VERIFY_PARAM *to, 199 const X509_VERIFY_PARAM *from) 200 { 201 unsigned long save_flags = to->inh_flags; 202 int ret; 203 to->inh_flags |= X509_VP_FLAG_DEFAULT; 204 ret = X509_VERIFY_PARAM_inherit(to, from); 205 to->inh_flags = save_flags; 206 return ret; 207 } 208 209 int X509_VERIFY_PARAM_set1_name(X509_VERIFY_PARAM *param, const char *name) 210 { 211 if (param->name) 212 OPENSSL_free(param->name); 213 param->name = BUF_strdup(name); 214 if (param->name) 215 return 1; 216 return 0; 217 } 218 219 int X509_VERIFY_PARAM_set_flags(X509_VERIFY_PARAM *param, unsigned long flags) 220 { 221 param->flags |= flags; 222 if (flags & X509_V_FLAG_POLICY_MASK) 223 param->flags |= X509_V_FLAG_POLICY_CHECK; 224 return 1; 225 } 226 227 int X509_VERIFY_PARAM_clear_flags(X509_VERIFY_PARAM *param, unsigned long flags) 228 { 229 param->flags &= ~flags; 230 return 1; 231 } 232 233 unsigned long X509_VERIFY_PARAM_get_flags(X509_VERIFY_PARAM *param) 234 { 235 return param->flags; 236 } 237 238 int X509_VERIFY_PARAM_set_purpose(X509_VERIFY_PARAM *param, int purpose) 239 { 240 return X509_PURPOSE_set(¶m->purpose, purpose); 241 } 242 243 int X509_VERIFY_PARAM_set_trust(X509_VERIFY_PARAM *param, int trust) 244 { 245 return X509_TRUST_set(¶m->trust, trust); 246 } 247 248 void X509_VERIFY_PARAM_set_depth(X509_VERIFY_PARAM *param, int depth) 249 { 250 param->depth = depth; 251 } 252 253 void X509_VERIFY_PARAM_set_time(X509_VERIFY_PARAM *param, time_t t) 254 { 255 param->check_time = t; 256 param->flags |= X509_V_FLAG_USE_CHECK_TIME; 257 } 258 259 int X509_VERIFY_PARAM_add0_policy(X509_VERIFY_PARAM *param, ASN1_OBJECT *policy) 260 { 261 if (!param->policies) 262 { 263 param->policies = sk_ASN1_OBJECT_new_null(); 264 if (!param->policies) 265 return 0; 266 } 267 if (!sk_ASN1_OBJECT_push(param->policies, policy)) 268 return 0; 269 return 1; 270 } 271 272 int X509_VERIFY_PARAM_set1_policies(X509_VERIFY_PARAM *param, 273 STACK_OF(ASN1_OBJECT) *policies) 274 { 275 int i; 276 ASN1_OBJECT *oid, *doid; 277 if (!param) 278 return 0; 279 if (param->policies) 280 sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free); 281 282 if (!policies) 283 { 284 param->policies = NULL; 285 return 1; 286 } 287 288 param->policies = sk_ASN1_OBJECT_new_null(); 289 if (!param->policies) 290 return 0; 291 292 for (i = 0; i < sk_ASN1_OBJECT_num(policies); i++) 293 { 294 oid = sk_ASN1_OBJECT_value(policies, i); 295 doid = OBJ_dup(oid); 296 if (!doid) 297 return 0; 298 if (!sk_ASN1_OBJECT_push(param->policies, doid)) 299 { 300 ASN1_OBJECT_free(doid); 301 return 0; 302 } 303 } 304 param->flags |= X509_V_FLAG_POLICY_CHECK; 305 return 1; 306 } 307 308 int X509_VERIFY_PARAM_get_depth(const X509_VERIFY_PARAM *param) 309 { 310 return param->depth; 311 } 312 313 /* Default verify parameters: these are used for various 314 * applications and can be overridden by the user specified table. 315 * NB: the 'name' field *must* be in alphabetical order because it 316 * will be searched using OBJ_search. 317 */ 318 319 static const X509_VERIFY_PARAM default_table[] = { 320 { 321 "default", /* X509 default parameters */ 322 0, /* Check time */ 323 0, /* internal flags */ 324 0, /* flags */ 325 0, /* purpose */ 326 0, /* trust */ 327 100, /* depth */ 328 NULL /* policies */ 329 }, 330 { 331 "pkcs7", /* S/MIME signing parameters */ 332 0, /* Check time */ 333 0, /* internal flags */ 334 0, /* flags */ 335 X509_PURPOSE_SMIME_SIGN, /* purpose */ 336 X509_TRUST_EMAIL, /* trust */ 337 -1, /* depth */ 338 NULL /* policies */ 339 }, 340 { 341 "smime_sign", /* S/MIME signing parameters */ 342 0, /* Check time */ 343 0, /* internal flags */ 344 0, /* flags */ 345 X509_PURPOSE_SMIME_SIGN, /* purpose */ 346 X509_TRUST_EMAIL, /* trust */ 347 -1, /* depth */ 348 NULL /* policies */ 349 }, 350 { 351 "ssl_client", /* SSL/TLS client parameters */ 352 0, /* Check time */ 353 0, /* internal flags */ 354 0, /* flags */ 355 X509_PURPOSE_SSL_CLIENT, /* purpose */ 356 X509_TRUST_SSL_CLIENT, /* trust */ 357 -1, /* depth */ 358 NULL /* policies */ 359 }, 360 { 361 "ssl_server", /* SSL/TLS server parameters */ 362 0, /* Check time */ 363 0, /* internal flags */ 364 0, /* flags */ 365 X509_PURPOSE_SSL_SERVER, /* purpose */ 366 X509_TRUST_SSL_SERVER, /* trust */ 367 -1, /* depth */ 368 NULL /* policies */ 369 }}; 370 371 static STACK_OF(X509_VERIFY_PARAM) *param_table = NULL; 372 373 static int table_cmp(const void *pa, const void *pb) 374 { 375 const X509_VERIFY_PARAM *a = pa, *b = pb; 376 return strcmp(a->name, b->name); 377 } 378 379 static int param_cmp(const X509_VERIFY_PARAM * const *a, 380 const X509_VERIFY_PARAM * const *b) 381 { 382 return strcmp((*a)->name, (*b)->name); 383 } 384 385 int X509_VERIFY_PARAM_add0_table(X509_VERIFY_PARAM *param) 386 { 387 int idx; 388 X509_VERIFY_PARAM *ptmp; 389 if (!param_table) 390 { 391 param_table = sk_X509_VERIFY_PARAM_new(param_cmp); 392 if (!param_table) 393 return 0; 394 } 395 else 396 { 397 idx = sk_X509_VERIFY_PARAM_find(param_table, param); 398 if (idx != -1) 399 { 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 } 409 410 const X509_VERIFY_PARAM *X509_VERIFY_PARAM_lookup(const char *name) 411 { 412 int idx; 413 X509_VERIFY_PARAM pm; 414 pm.name = (char *)name; 415 if (param_table) 416 { 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 (const X509_VERIFY_PARAM *) OBJ_bsearch((char *)&pm, 422 (char *)&default_table, 423 sizeof(default_table)/sizeof(X509_VERIFY_PARAM), 424 sizeof(X509_VERIFY_PARAM), 425 table_cmp); 426 } 427 428 void X509_VERIFY_PARAM_table_cleanup(void) 429 { 430 if (param_table) 431 sk_X509_VERIFY_PARAM_pop_free(param_table, 432 X509_VERIFY_PARAM_free); 433 param_table = NULL; 434 } 435
