x509_vpm.c revision 296465
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 param->inh_flags = 0; 79 param->flags = 0; 80 param->depth = -1; 81 if (param->policies) { 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/*- 103 * This function determines how parameters are "inherited" from one structure 104 * to another. There are several different ways this can happen. 105 * 106 * 1. If a child structure needs to have its values initialized from a parent 107 * they are simply copied across. For example SSL_CTX copied to SSL. 108 * 2. If the structure should take on values only if they are currently unset. 109 * For example the values in an SSL structure will take appropriate value 110 * for SSL servers or clients but only if the application has not set new 111 * ones. 112 * 113 * The "inh_flags" field determines how this function behaves. 114 * 115 * Normally any values which are set in the default are not copied from the 116 * destination and verify flags are ORed together. 117 * 118 * If X509_VP_FLAG_DEFAULT is set then anything set in the source is copied 119 * to the destination. Effectively the values in "to" become default values 120 * which will be used only if nothing new is set in "from". 121 * 122 * If X509_VP_FLAG_OVERWRITE is set then all value are copied across whether 123 * they are set or not. Flags is still Ored though. 124 * 125 * If X509_VP_FLAG_RESET_FLAGS is set then the flags value is copied instead 126 * of ORed. 127 * 128 * If X509_VP_FLAG_LOCKED is set then no values are copied. 129 * 130 * If X509_VP_FLAG_ONCE is set then the current inh_flags setting is zeroed 131 * after the next call. 132 */ 133 134/* Macro to test if a field should be copied from src to dest */ 135 136#define test_x509_verify_param_copy(field, def) \ 137 (to_overwrite || \ 138 ((src->field != def) && (to_default || (dest->field == def)))) 139 140/* Macro to test and copy a field if necessary */ 141 142#define x509_verify_param_copy(field, def) \ 143 if (test_x509_verify_param_copy(field, def)) \ 144 dest->field = src->field 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 dest->check_time = src->check_time; 179 dest->flags &= ~X509_V_FLAG_USE_CHECK_TIME; 180 /* Don't need to copy flag: that is done below */ 181 } 182 183 if (inh_flags & X509_VP_FLAG_RESET_FLAGS) 184 dest->flags = 0; 185 186 dest->flags |= src->flags; 187 188 if (test_x509_verify_param_copy(policies, NULL)) { 189 if (!X509_VERIFY_PARAM_set1_policies(dest, src->policies)) 190 return 0; 191 } 192 193 return 1; 194} 195 196int X509_VERIFY_PARAM_set1(X509_VERIFY_PARAM *to, 197 const X509_VERIFY_PARAM *from) 198{ 199 unsigned long save_flags = to->inh_flags; 200 int ret; 201 to->inh_flags |= X509_VP_FLAG_DEFAULT; 202 ret = X509_VERIFY_PARAM_inherit(to, from); 203 to->inh_flags = save_flags; 204 return ret; 205} 206 207int X509_VERIFY_PARAM_set1_name(X509_VERIFY_PARAM *param, const char *name) 208{ 209 if (param->name) 210 OPENSSL_free(param->name); 211 param->name = BUF_strdup(name); 212 if (param->name) 213 return 1; 214 return 0; 215} 216 217int X509_VERIFY_PARAM_set_flags(X509_VERIFY_PARAM *param, unsigned long flags) 218{ 219 param->flags |= flags; 220 if (flags & X509_V_FLAG_POLICY_MASK) 221 param->flags |= X509_V_FLAG_POLICY_CHECK; 222 return 1; 223} 224 225int X509_VERIFY_PARAM_clear_flags(X509_VERIFY_PARAM *param, 226 unsigned long flags) 227{ 228 param->flags &= ~flags; 229 return 1; 230} 231 232unsigned long X509_VERIFY_PARAM_get_flags(X509_VERIFY_PARAM *param) 233{ 234 return param->flags; 235} 236 237int X509_VERIFY_PARAM_set_purpose(X509_VERIFY_PARAM *param, int purpose) 238{ 239 return X509_PURPOSE_set(¶m->purpose, purpose); 240} 241 242int X509_VERIFY_PARAM_set_trust(X509_VERIFY_PARAM *param, int trust) 243{ 244 return X509_TRUST_set(¶m->trust, trust); 245} 246 247void X509_VERIFY_PARAM_set_depth(X509_VERIFY_PARAM *param, int depth) 248{ 249 param->depth = depth; 250} 251 252void X509_VERIFY_PARAM_set_time(X509_VERIFY_PARAM *param, time_t t) 253{ 254 param->check_time = t; 255 param->flags |= X509_V_FLAG_USE_CHECK_TIME; 256} 257 258int X509_VERIFY_PARAM_add0_policy(X509_VERIFY_PARAM *param, 259 ASN1_OBJECT *policy) 260{ 261 if (!param->policies) { 262 param->policies = sk_ASN1_OBJECT_new_null(); 263 if (!param->policies) 264 return 0; 265 } 266 if (!sk_ASN1_OBJECT_push(param->policies, policy)) 267 return 0; 268 return 1; 269} 270 271int X509_VERIFY_PARAM_set1_policies(X509_VERIFY_PARAM *param, 272 STACK_OF(ASN1_OBJECT) *policies) 273{ 274 int i; 275 ASN1_OBJECT *oid, *doid; 276 if (!param) 277 return 0; 278 if (param->policies) 279 sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free); 280 281 if (!policies) { 282 param->policies = NULL; 283 return 1; 284 } 285 286 param->policies = sk_ASN1_OBJECT_new_null(); 287 if (!param->policies) 288 return 0; 289 290 for (i = 0; i < sk_ASN1_OBJECT_num(policies); i++) { 291 oid = sk_ASN1_OBJECT_value(policies, i); 292 doid = OBJ_dup(oid); 293 if (!doid) 294 return 0; 295 if (!sk_ASN1_OBJECT_push(param->policies, doid)) { 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/* 310 * Default verify parameters: these are used for various applications and can 311 * be overridden by the user specified table. NB: the 'name' field *must* be 312 * in alphabetical order because it 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 */ 323 100, /* depth */ 324 NULL /* policies */ 325 }, 326 { 327 "pkcs7", /* S/MIME signing 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 "smime_sign", /* S/MIME signing parameters */ 338 0, /* Check time */ 339 0, /* internal flags */ 340 0, /* flags */ 341 X509_PURPOSE_SMIME_SIGN, /* purpose */ 342 X509_TRUST_EMAIL, /* trust */ 343 -1, /* depth */ 344 NULL /* policies */ 345 }, 346 { 347 "ssl_client", /* SSL/TLS client parameters */ 348 0, /* Check time */ 349 0, /* internal flags */ 350 0, /* flags */ 351 X509_PURPOSE_SSL_CLIENT, /* purpose */ 352 X509_TRUST_SSL_CLIENT, /* trust */ 353 -1, /* depth */ 354 NULL /* policies */ 355 }, 356 { 357 "ssl_server", /* SSL/TLS server parameters */ 358 0, /* Check time */ 359 0, /* internal flags */ 360 0, /* flags */ 361 X509_PURPOSE_SSL_SERVER, /* purpose */ 362 X509_TRUST_SSL_SERVER, /* trust */ 363 -1, /* depth */ 364 NULL /* policies */ 365 } 366}; 367 368static STACK_OF(X509_VERIFY_PARAM) *param_table = NULL; 369 370static int table_cmp(const void *pa, const void *pb) 371{ 372 const X509_VERIFY_PARAM *a = pa, *b = pb; 373 return strcmp(a->name, b->name); 374} 375 376static int param_cmp(const X509_VERIFY_PARAM *const *a, 377 const X509_VERIFY_PARAM *const *b) 378{ 379 return strcmp((*a)->name, (*b)->name); 380} 381 382int X509_VERIFY_PARAM_add0_table(X509_VERIFY_PARAM *param) 383{ 384 int idx; 385 X509_VERIFY_PARAM *ptmp; 386 if (!param_table) { 387 param_table = sk_X509_VERIFY_PARAM_new(param_cmp); 388 if (!param_table) 389 return 0; 390 } else { 391 idx = sk_X509_VERIFY_PARAM_find(param_table, param); 392 if (idx != -1) { 393 ptmp = sk_X509_VERIFY_PARAM_value(param_table, idx); 394 X509_VERIFY_PARAM_free(ptmp); 395 (void)sk_X509_VERIFY_PARAM_delete(param_table, idx); 396 } 397 } 398 if (!sk_X509_VERIFY_PARAM_push(param_table, param)) 399 return 0; 400 return 1; 401} 402 403const X509_VERIFY_PARAM *X509_VERIFY_PARAM_lookup(const char *name) 404{ 405 int idx; 406 X509_VERIFY_PARAM pm; 407 pm.name = (char *)name; 408 if (param_table) { 409 idx = sk_X509_VERIFY_PARAM_find(param_table, &pm); 410 if (idx != -1) 411 return sk_X509_VERIFY_PARAM_value(param_table, idx); 412 } 413 return (const X509_VERIFY_PARAM *)OBJ_bsearch((char *)&pm, 414 (char *)&default_table, 415 sizeof(default_table) / 416 sizeof(X509_VERIFY_PARAM), 417 sizeof(X509_VERIFY_PARAM), 418 table_cmp); 419} 420 421void X509_VERIFY_PARAM_table_cleanup(void) 422{ 423 if (param_table) 424 sk_X509_VERIFY_PARAM_pop_free(param_table, X509_VERIFY_PARAM_free); 425 param_table = NULL; 426} 427