1 /* crypto/x509/x509_lu.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh (at) cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay (at) cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh (at) cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59 #include <stdio.h> 60 #include "cryptlib.h" 61 #include <openssl/lhash.h> 62 #include <openssl/x509.h> 63 #include <openssl/x509v3.h> 64 65 X509_LOOKUP *X509_LOOKUP_new(X509_LOOKUP_METHOD *method) 66 { 67 X509_LOOKUP *ret; 68 69 ret=(X509_LOOKUP *)OPENSSL_malloc(sizeof(X509_LOOKUP)); 70 if (ret == NULL) return NULL; 71 72 ret->init=0; 73 ret->skip=0; 74 ret->method=method; 75 ret->method_data=NULL; 76 ret->store_ctx=NULL; 77 if ((method->new_item != NULL) && !method->new_item(ret)) 78 { 79 OPENSSL_free(ret); 80 return NULL; 81 } 82 return ret; 83 } 84 85 void X509_LOOKUP_free(X509_LOOKUP *ctx) 86 { 87 if (ctx == NULL) return; 88 if ( (ctx->method != NULL) && 89 (ctx->method->free != NULL)) 90 ctx->method->free(ctx); 91 OPENSSL_free(ctx); 92 } 93 94 int X509_LOOKUP_init(X509_LOOKUP *ctx) 95 { 96 if (ctx->method == NULL) return 0; 97 if (ctx->method->init != NULL) 98 return ctx->method->init(ctx); 99 else 100 return 1; 101 } 102 103 int X509_LOOKUP_shutdown(X509_LOOKUP *ctx) 104 { 105 if (ctx->method == NULL) return 0; 106 if (ctx->method->shutdown != NULL) 107 return ctx->method->shutdown(ctx); 108 else 109 return 1; 110 } 111 112 int X509_LOOKUP_ctrl(X509_LOOKUP *ctx, int cmd, const char *argc, long argl, 113 char **ret) 114 { 115 if (ctx->method == NULL) return -1; 116 if (ctx->method->ctrl != NULL) 117 return ctx->method->ctrl(ctx,cmd,argc,argl,ret); 118 else 119 return 1; 120 } 121 122 int X509_LOOKUP_by_subject(X509_LOOKUP *ctx, int type, X509_NAME *name, 123 X509_OBJECT *ret) 124 { 125 if ((ctx->method == NULL) || (ctx->method->get_by_subject == NULL)) 126 return X509_LU_FAIL; 127 if (ctx->skip) return 0; 128 return ctx->method->get_by_subject(ctx,type,name,ret); 129 } 130 131 int X509_LOOKUP_by_issuer_serial(X509_LOOKUP *ctx, int type, X509_NAME *name, 132 ASN1_INTEGER *serial, X509_OBJECT *ret) 133 { 134 if ((ctx->method == NULL) || 135 (ctx->method->get_by_issuer_serial == NULL)) 136 return X509_LU_FAIL; 137 return ctx->method->get_by_issuer_serial(ctx,type,name,serial,ret); 138 } 139 140 int X509_LOOKUP_by_fingerprint(X509_LOOKUP *ctx, int type, 141 unsigned char *bytes, int len, X509_OBJECT *ret) 142 { 143 if ((ctx->method == NULL) || (ctx->method->get_by_fingerprint == NULL)) 144 return X509_LU_FAIL; 145 return ctx->method->get_by_fingerprint(ctx,type,bytes,len,ret); 146 } 147 148 int X509_LOOKUP_by_alias(X509_LOOKUP *ctx, int type, char *str, int len, 149 X509_OBJECT *ret) 150 { 151 if ((ctx->method == NULL) || (ctx->method->get_by_alias == NULL)) 152 return X509_LU_FAIL; 153 return ctx->method->get_by_alias(ctx,type,str,len,ret); 154 } 155 156 157 static int x509_object_cmp(const X509_OBJECT * const *a, const X509_OBJECT * const *b) 158 { 159 int ret; 160 161 ret=((*a)->type - (*b)->type); 162 if (ret) return ret; 163 switch ((*a)->type) 164 { 165 case X509_LU_X509: 166 ret=X509_subject_name_cmp((*a)->data.x509,(*b)->data.x509); 167 break; 168 case X509_LU_CRL: 169 ret=X509_CRL_cmp((*a)->data.crl,(*b)->data.crl); 170 break; 171 default: 172 /* abort(); */ 173 return 0; 174 } 175 return ret; 176 } 177 178 X509_STORE *X509_STORE_new(void) 179 { 180 X509_STORE *ret; 181 182 if ((ret=(X509_STORE *)OPENSSL_malloc(sizeof(X509_STORE))) == NULL) 183 return NULL; 184 ret->objs = sk_X509_OBJECT_new(x509_object_cmp); 185 ret->cache=1; 186 ret->get_cert_methods=sk_X509_LOOKUP_new_null(); 187 ret->verify=0; 188 ret->verify_cb=0; 189 190 if ((ret->param = X509_VERIFY_PARAM_new()) == NULL) 191 return NULL; 192 193 ret->get_issuer = 0; 194 ret->check_issued = 0; 195 ret->check_revocation = 0; 196 ret->get_crl = 0; 197 ret->check_crl = 0; 198 ret->cert_crl = 0; 199 ret->cleanup = 0; 200 201 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509_STORE, ret, &ret->ex_data)) 202 { 203 sk_X509_OBJECT_free(ret->objs); 204 OPENSSL_free(ret); 205 return NULL; 206 } 207 208 ret->references=1; 209 return ret; 210 } 211 212 static void cleanup(X509_OBJECT *a) 213 { 214 if (a->type == X509_LU_X509) 215 { 216 X509_free(a->data.x509); 217 } 218 else if (a->type == X509_LU_CRL) 219 { 220 X509_CRL_free(a->data.crl); 221 } 222 else 223 { 224 /* abort(); */ 225 } 226 227 OPENSSL_free(a); 228 } 229 230 void X509_STORE_free(X509_STORE *vfy) 231 { 232 int i; 233 STACK_OF(X509_LOOKUP) *sk; 234 X509_LOOKUP *lu; 235 236 if (vfy == NULL) 237 return; 238 239 sk=vfy->get_cert_methods; 240 for (i=0; i<sk_X509_LOOKUP_num(sk); i++) 241 { 242 lu=sk_X509_LOOKUP_value(sk,i); 243 X509_LOOKUP_shutdown(lu); 244 X509_LOOKUP_free(lu); 245 } 246 sk_X509_LOOKUP_free(sk); 247 sk_X509_OBJECT_pop_free(vfy->objs, cleanup); 248 249 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509_STORE, vfy, &vfy->ex_data); 250 if (vfy->param) 251 X509_VERIFY_PARAM_free(vfy->param); 252 OPENSSL_free(vfy); 253 } 254 255 X509_LOOKUP *X509_STORE_add_lookup(X509_STORE *v, X509_LOOKUP_METHOD *m) 256 { 257 int i; 258 STACK_OF(X509_LOOKUP) *sk; 259 X509_LOOKUP *lu; 260 261 sk=v->get_cert_methods; 262 for (i=0; i<sk_X509_LOOKUP_num(sk); i++) 263 { 264 lu=sk_X509_LOOKUP_value(sk,i); 265 if (m == lu->method) 266 { 267 return lu; 268 } 269 } 270 /* a new one */ 271 lu=X509_LOOKUP_new(m); 272 if (lu == NULL) 273 return NULL; 274 else 275 { 276 lu->store_ctx=v; 277 if (sk_X509_LOOKUP_push(v->get_cert_methods,lu)) 278 return lu; 279 else 280 { 281 X509_LOOKUP_free(lu); 282 return NULL; 283 } 284 } 285 } 286 287 int X509_STORE_get_by_subject(X509_STORE_CTX *vs, int type, X509_NAME *name, 288 X509_OBJECT *ret) 289 { 290 X509_STORE *ctx=vs->ctx; 291 X509_LOOKUP *lu; 292 X509_OBJECT stmp,*tmp; 293 int i,j; 294 295 CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE); 296 tmp=X509_OBJECT_retrieve_by_subject(ctx->objs,type,name); 297 CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE); 298 299 if (tmp == NULL) 300 { 301 for (i=vs->current_method; i<sk_X509_LOOKUP_num(ctx->get_cert_methods); i++) 302 { 303 lu=sk_X509_LOOKUP_value(ctx->get_cert_methods,i); 304 j=X509_LOOKUP_by_subject(lu,type,name,&stmp); 305 if (j < 0) 306 { 307 vs->current_method=j; 308 return j; 309 } 310 else if (j) 311 { 312 tmp= &stmp; 313 break; 314 } 315 } 316 vs->current_method=0; 317 if (tmp == NULL) 318 return 0; 319 } 320 321 /* if (ret->data.ptr != NULL) 322 X509_OBJECT_free_contents(ret); */ 323 324 ret->type=tmp->type; 325 ret->data.ptr=tmp->data.ptr; 326 327 X509_OBJECT_up_ref_count(ret); 328 329 return 1; 330 } 331 332 int X509_STORE_add_cert(X509_STORE *ctx, X509 *x) 333 { 334 X509_OBJECT *obj; 335 int ret=1; 336 337 if (x == NULL) return 0; 338 obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT)); 339 if (obj == NULL) 340 { 341 X509err(X509_F_X509_STORE_ADD_CERT,ERR_R_MALLOC_FAILURE); 342 return 0; 343 } 344 obj->type=X509_LU_X509; 345 obj->data.x509=x; 346 347 CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE); 348 349 X509_OBJECT_up_ref_count(obj); 350 351 if (X509_OBJECT_retrieve_match(ctx->objs, obj)) 352 { 353 X509_OBJECT_free_contents(obj); 354 OPENSSL_free(obj); 355 X509err(X509_F_X509_STORE_ADD_CERT,X509_R_CERT_ALREADY_IN_HASH_TABLE); 356 ret=0; 357 } 358 else sk_X509_OBJECT_push(ctx->objs, obj); 359 360 CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE); 361 362 return ret; 363 } 364 365 int X509_STORE_add_crl(X509_STORE *ctx, X509_CRL *x) 366 { 367 X509_OBJECT *obj; 368 int ret=1; 369 370 if (x == NULL) return 0; 371 obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT)); 372 if (obj == NULL) 373 { 374 X509err(X509_F_X509_STORE_ADD_CRL,ERR_R_MALLOC_FAILURE); 375 return 0; 376 } 377 obj->type=X509_LU_CRL; 378 obj->data.crl=x; 379 380 CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE); 381 382 X509_OBJECT_up_ref_count(obj); 383 384 if (X509_OBJECT_retrieve_match(ctx->objs, obj)) 385 { 386 X509_OBJECT_free_contents(obj); 387 OPENSSL_free(obj); 388 X509err(X509_F_X509_STORE_ADD_CRL,X509_R_CERT_ALREADY_IN_HASH_TABLE); 389 ret=0; 390 } 391 else sk_X509_OBJECT_push(ctx->objs, obj); 392 393 CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE); 394 395 return ret; 396 } 397 398 void X509_OBJECT_up_ref_count(X509_OBJECT *a) 399 { 400 switch (a->type) 401 { 402 case X509_LU_X509: 403 CRYPTO_add(&a->data.x509->references,1,CRYPTO_LOCK_X509); 404 break; 405 case X509_LU_CRL: 406 CRYPTO_add(&a->data.crl->references,1,CRYPTO_LOCK_X509_CRL); 407 break; 408 } 409 } 410 411 void X509_OBJECT_free_contents(X509_OBJECT *a) 412 { 413 switch (a->type) 414 { 415 case X509_LU_X509: 416 X509_free(a->data.x509); 417 break; 418 case X509_LU_CRL: 419 X509_CRL_free(a->data.crl); 420 break; 421 } 422 } 423 424 int X509_OBJECT_idx_by_subject(STACK_OF(X509_OBJECT) *h, int type, 425 X509_NAME *name) 426 { 427 X509_OBJECT stmp; 428 X509 x509_s; 429 X509_CINF cinf_s; 430 X509_CRL crl_s; 431 X509_CRL_INFO crl_info_s; 432 433 stmp.type=type; 434 switch (type) 435 { 436 case X509_LU_X509: 437 stmp.data.x509= &x509_s; 438 x509_s.cert_info= &cinf_s; 439 cinf_s.subject=name; 440 break; 441 case X509_LU_CRL: 442 stmp.data.crl= &crl_s; 443 crl_s.crl= &crl_info_s; 444 crl_info_s.issuer=name; 445 break; 446 default: 447 /* abort(); */ 448 return -1; 449 } 450 451 return sk_X509_OBJECT_find(h,&stmp); 452 } 453 454 X509_OBJECT *X509_OBJECT_retrieve_by_subject(STACK_OF(X509_OBJECT) *h, int type, 455 X509_NAME *name) 456 { 457 int idx; 458 idx = X509_OBJECT_idx_by_subject(h, type, name); 459 if (idx==-1) return NULL; 460 return sk_X509_OBJECT_value(h, idx); 461 } 462 463 X509_OBJECT *X509_OBJECT_retrieve_match(STACK_OF(X509_OBJECT) *h, X509_OBJECT *x) 464 { 465 int idx, i; 466 X509_OBJECT *obj; 467 idx = sk_X509_OBJECT_find(h, x); 468 if (idx == -1) return NULL; 469 if (x->type != X509_LU_X509) return sk_X509_OBJECT_value(h, idx); 470 for (i = idx; i < sk_X509_OBJECT_num(h); i++) 471 { 472 obj = sk_X509_OBJECT_value(h, i); 473 if (x509_object_cmp((const X509_OBJECT **)&obj, (const X509_OBJECT **)&x)) 474 return NULL; 475 if ((x->type != X509_LU_X509) || !X509_cmp(obj->data.x509, x->data.x509)) 476 return obj; 477 } 478 return NULL; 479 } 480 481 482 /* Try to get issuer certificate from store. Due to limitations 483 * of the API this can only retrieve a single certificate matching 484 * a given subject name. However it will fill the cache with all 485 * matching certificates, so we can examine the cache for all 486 * matches. 487 * 488 * Return values are: 489 * 1 lookup successful. 490 * 0 certificate not found. 491 * -1 some other error. 492 */ 493 int X509_STORE_CTX_get1_issuer(X509 **issuer, X509_STORE_CTX *ctx, X509 *x) 494 { 495 X509_NAME *xn; 496 X509_OBJECT obj, *pobj; 497 int i, ok, idx, ret; 498 xn=X509_get_issuer_name(x); 499 ok=X509_STORE_get_by_subject(ctx,X509_LU_X509,xn,&obj); 500 if (ok != X509_LU_X509) 501 { 502 if (ok == X509_LU_RETRY) 503 { 504 X509_OBJECT_free_contents(&obj); 505 X509err(X509_F_X509_STORE_CTX_GET1_ISSUER,X509_R_SHOULD_RETRY); 506 return -1; 507 } 508 else if (ok != X509_LU_FAIL) 509 { 510 X509_OBJECT_free_contents(&obj); 511 /* not good :-(, break anyway */ 512 return -1; 513 } 514 return 0; 515 } 516 /* If certificate matches all OK */ 517 if (ctx->check_issued(ctx, x, obj.data.x509)) 518 { 519 *issuer = obj.data.x509; 520 return 1; 521 } 522 X509_OBJECT_free_contents(&obj); 523 524 /* Else find index of first cert accepted by 'check_issued' */ 525 ret = 0; 526 CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE); 527 idx = X509_OBJECT_idx_by_subject(ctx->ctx->objs, X509_LU_X509, xn); 528 if (idx != -1) /* should be true as we've had at least one match */ 529 { 530 /* Look through all matching certs for suitable issuer */ 531 for (i = idx; i < sk_X509_OBJECT_num(ctx->ctx->objs); i++) 532 { 533 pobj = sk_X509_OBJECT_value(ctx->ctx->objs, i); 534 /* See if we've run past the matches */ 535 if (pobj->type != X509_LU_X509) 536 break; 537 if (X509_NAME_cmp(xn, X509_get_subject_name(pobj->data.x509))) 538 break; 539 if (ctx->check_issued(ctx, x, pobj->data.x509)) 540 { 541 *issuer = pobj->data.x509; 542 X509_OBJECT_up_ref_count(pobj); 543 ret = 1; 544 break; 545 } 546 } 547 } 548 CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE); 549 return ret; 550 } 551 552 int X509_STORE_set_flags(X509_STORE *ctx, unsigned long flags) 553 { 554 return X509_VERIFY_PARAM_set_flags(ctx->param, flags); 555 } 556 557 int X509_STORE_set_depth(X509_STORE *ctx, int depth) 558 { 559 X509_VERIFY_PARAM_set_depth(ctx->param, depth); 560 return 1; 561 } 562 563 int X509_STORE_set_purpose(X509_STORE *ctx, int purpose) 564 { 565 return X509_VERIFY_PARAM_set_purpose(ctx->param, purpose); 566 } 567 568 int X509_STORE_set_trust(X509_STORE *ctx, int trust) 569 { 570 return X509_VERIFY_PARAM_set_trust(ctx->param, trust); 571 } 572 573 int X509_STORE_set1_param(X509_STORE *ctx, X509_VERIFY_PARAM *param) 574 { 575 return X509_VERIFY_PARAM_set1(ctx->param, param); 576 } 577 578 IMPLEMENT_STACK_OF(X509_LOOKUP) 579 IMPLEMENT_STACK_OF(X509_OBJECT) 580
