x509_lu.c revision 160815
1/* crypto/x509/x509_lu.c */ 2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@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@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@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@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 65X509_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 85void 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 94int 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 103int 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 112int 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 122int 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 131int 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 140int 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 148int 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 157static 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 178X509_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 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509_STORE, ret, &ret->ex_data); 202 ret->references=1; 203 return ret; 204 } 205 206static void cleanup(X509_OBJECT *a) 207 { 208 if (a->type == X509_LU_X509) 209 { 210 X509_free(a->data.x509); 211 } 212 else if (a->type == X509_LU_CRL) 213 { 214 X509_CRL_free(a->data.crl); 215 } 216 else 217 { 218 /* abort(); */ 219 } 220 221 OPENSSL_free(a); 222 } 223 224void X509_STORE_free(X509_STORE *vfy) 225 { 226 int i; 227 STACK_OF(X509_LOOKUP) *sk; 228 X509_LOOKUP *lu; 229 230 if (vfy == NULL) 231 return; 232 233 sk=vfy->get_cert_methods; 234 for (i=0; i<sk_X509_LOOKUP_num(sk); i++) 235 { 236 lu=sk_X509_LOOKUP_value(sk,i); 237 X509_LOOKUP_shutdown(lu); 238 X509_LOOKUP_free(lu); 239 } 240 sk_X509_LOOKUP_free(sk); 241 sk_X509_OBJECT_pop_free(vfy->objs, cleanup); 242 243 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509_STORE, vfy, &vfy->ex_data); 244 if (vfy->param) 245 X509_VERIFY_PARAM_free(vfy->param); 246 OPENSSL_free(vfy); 247 } 248 249X509_LOOKUP *X509_STORE_add_lookup(X509_STORE *v, X509_LOOKUP_METHOD *m) 250 { 251 int i; 252 STACK_OF(X509_LOOKUP) *sk; 253 X509_LOOKUP *lu; 254 255 sk=v->get_cert_methods; 256 for (i=0; i<sk_X509_LOOKUP_num(sk); i++) 257 { 258 lu=sk_X509_LOOKUP_value(sk,i); 259 if (m == lu->method) 260 { 261 return lu; 262 } 263 } 264 /* a new one */ 265 lu=X509_LOOKUP_new(m); 266 if (lu == NULL) 267 return NULL; 268 else 269 { 270 lu->store_ctx=v; 271 if (sk_X509_LOOKUP_push(v->get_cert_methods,lu)) 272 return lu; 273 else 274 { 275 X509_LOOKUP_free(lu); 276 return NULL; 277 } 278 } 279 } 280 281int X509_STORE_get_by_subject(X509_STORE_CTX *vs, int type, X509_NAME *name, 282 X509_OBJECT *ret) 283 { 284 X509_STORE *ctx=vs->ctx; 285 X509_LOOKUP *lu; 286 X509_OBJECT stmp,*tmp; 287 int i,j; 288 289 tmp=X509_OBJECT_retrieve_by_subject(ctx->objs,type,name); 290 291 if (tmp == NULL) 292 { 293 for (i=vs->current_method; i<sk_X509_LOOKUP_num(ctx->get_cert_methods); i++) 294 { 295 lu=sk_X509_LOOKUP_value(ctx->get_cert_methods,i); 296 j=X509_LOOKUP_by_subject(lu,type,name,&stmp); 297 if (j < 0) 298 { 299 vs->current_method=j; 300 return j; 301 } 302 else if (j) 303 { 304 tmp= &stmp; 305 break; 306 } 307 } 308 vs->current_method=0; 309 if (tmp == NULL) 310 return 0; 311 } 312 313/* if (ret->data.ptr != NULL) 314 X509_OBJECT_free_contents(ret); */ 315 316 ret->type=tmp->type; 317 ret->data.ptr=tmp->data.ptr; 318 319 X509_OBJECT_up_ref_count(ret); 320 321 return 1; 322 } 323 324int X509_STORE_add_cert(X509_STORE *ctx, X509 *x) 325 { 326 X509_OBJECT *obj; 327 int ret=1; 328 329 if (x == NULL) return 0; 330 obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT)); 331 if (obj == NULL) 332 { 333 X509err(X509_F_X509_STORE_ADD_CERT,ERR_R_MALLOC_FAILURE); 334 return 0; 335 } 336 obj->type=X509_LU_X509; 337 obj->data.x509=x; 338 339 CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE); 340 341 X509_OBJECT_up_ref_count(obj); 342 343 344 if (X509_OBJECT_retrieve_match(ctx->objs, obj)) 345 { 346 X509_OBJECT_free_contents(obj); 347 OPENSSL_free(obj); 348 X509err(X509_F_X509_STORE_ADD_CERT,X509_R_CERT_ALREADY_IN_HASH_TABLE); 349 ret=0; 350 } 351 else sk_X509_OBJECT_push(ctx->objs, obj); 352 353 CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE); 354 355 return ret; 356 } 357 358int X509_STORE_add_crl(X509_STORE *ctx, X509_CRL *x) 359 { 360 X509_OBJECT *obj; 361 int ret=1; 362 363 if (x == NULL) return 0; 364 obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT)); 365 if (obj == NULL) 366 { 367 X509err(X509_F_X509_STORE_ADD_CRL,ERR_R_MALLOC_FAILURE); 368 return 0; 369 } 370 obj->type=X509_LU_CRL; 371 obj->data.crl=x; 372 373 CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE); 374 375 X509_OBJECT_up_ref_count(obj); 376 377 if (X509_OBJECT_retrieve_match(ctx->objs, obj)) 378 { 379 X509_OBJECT_free_contents(obj); 380 OPENSSL_free(obj); 381 X509err(X509_F_X509_STORE_ADD_CRL,X509_R_CERT_ALREADY_IN_HASH_TABLE); 382 ret=0; 383 } 384 else sk_X509_OBJECT_push(ctx->objs, obj); 385 386 CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE); 387 388 return ret; 389 } 390 391void X509_OBJECT_up_ref_count(X509_OBJECT *a) 392 { 393 switch (a->type) 394 { 395 case X509_LU_X509: 396 CRYPTO_add(&a->data.x509->references,1,CRYPTO_LOCK_X509); 397 break; 398 case X509_LU_CRL: 399 CRYPTO_add(&a->data.crl->references,1,CRYPTO_LOCK_X509_CRL); 400 break; 401 } 402 } 403 404void X509_OBJECT_free_contents(X509_OBJECT *a) 405 { 406 switch (a->type) 407 { 408 case X509_LU_X509: 409 X509_free(a->data.x509); 410 break; 411 case X509_LU_CRL: 412 X509_CRL_free(a->data.crl); 413 break; 414 } 415 } 416 417int X509_OBJECT_idx_by_subject(STACK_OF(X509_OBJECT) *h, int type, 418 X509_NAME *name) 419 { 420 X509_OBJECT stmp; 421 X509 x509_s; 422 X509_CINF cinf_s; 423 X509_CRL crl_s; 424 X509_CRL_INFO crl_info_s; 425 426 stmp.type=type; 427 switch (type) 428 { 429 case X509_LU_X509: 430 stmp.data.x509= &x509_s; 431 x509_s.cert_info= &cinf_s; 432 cinf_s.subject=name; 433 break; 434 case X509_LU_CRL: 435 stmp.data.crl= &crl_s; 436 crl_s.crl= &crl_info_s; 437 crl_info_s.issuer=name; 438 break; 439 default: 440 /* abort(); */ 441 return -1; 442 } 443 444 return sk_X509_OBJECT_find(h,&stmp); 445 } 446 447X509_OBJECT *X509_OBJECT_retrieve_by_subject(STACK_OF(X509_OBJECT) *h, int type, 448 X509_NAME *name) 449{ 450 int idx; 451 idx = X509_OBJECT_idx_by_subject(h, type, name); 452 if (idx==-1) return NULL; 453 return sk_X509_OBJECT_value(h, idx); 454} 455 456X509_OBJECT *X509_OBJECT_retrieve_match(STACK_OF(X509_OBJECT) *h, X509_OBJECT *x) 457{ 458 int idx, i; 459 X509_OBJECT *obj; 460 idx = sk_X509_OBJECT_find(h, x); 461 if (idx == -1) return NULL; 462 if (x->type != X509_LU_X509) return sk_X509_OBJECT_value(h, idx); 463 for (i = idx; i < sk_X509_OBJECT_num(h); i++) 464 { 465 obj = sk_X509_OBJECT_value(h, i); 466 if (x509_object_cmp((const X509_OBJECT **)&obj, (const X509_OBJECT **)&x)) 467 return NULL; 468 if ((x->type != X509_LU_X509) || !X509_cmp(obj->data.x509, x->data.x509)) 469 return obj; 470 } 471 return NULL; 472} 473 474 475/* Try to get issuer certificate from store. Due to limitations 476 * of the API this can only retrieve a single certificate matching 477 * a given subject name. However it will fill the cache with all 478 * matching certificates, so we can examine the cache for all 479 * matches. 480 * 481 * Return values are: 482 * 1 lookup successful. 483 * 0 certificate not found. 484 * -1 some other error. 485 */ 486 487 488int X509_STORE_CTX_get1_issuer(X509 **issuer, X509_STORE_CTX *ctx, X509 *x) 489{ 490 X509_NAME *xn; 491 X509_OBJECT obj, *pobj; 492 int i, ok, idx; 493 xn=X509_get_issuer_name(x); 494 ok=X509_STORE_get_by_subject(ctx,X509_LU_X509,xn,&obj); 495 if (ok != X509_LU_X509) 496 { 497 if (ok == X509_LU_RETRY) 498 { 499 X509_OBJECT_free_contents(&obj); 500 X509err(X509_F_X509_STORE_CTX_GET1_ISSUER,X509_R_SHOULD_RETRY); 501 return -1; 502 } 503 else if (ok != X509_LU_FAIL) 504 { 505 X509_OBJECT_free_contents(&obj); 506 /* not good :-(, break anyway */ 507 return -1; 508 } 509 return 0; 510 } 511 /* If certificate matches all OK */ 512 if (ctx->check_issued(ctx, x, obj.data.x509)) 513 { 514 *issuer = obj.data.x509; 515 return 1; 516 } 517 X509_OBJECT_free_contents(&obj); 518 /* Else find index of first matching cert */ 519 idx = X509_OBJECT_idx_by_subject(ctx->ctx->objs, X509_LU_X509, xn); 520 /* This shouldn't normally happen since we already have one match */ 521 if (idx == -1) return 0; 522 523 /* Look through all matching certificates for a suitable issuer */ 524 for (i = idx; i < sk_X509_OBJECT_num(ctx->ctx->objs); i++) 525 { 526 pobj = sk_X509_OBJECT_value(ctx->ctx->objs, i); 527 /* See if we've ran out of matches */ 528 if (pobj->type != X509_LU_X509) return 0; 529 if (X509_NAME_cmp(xn, X509_get_subject_name(pobj->data.x509))) return 0; 530 if (ctx->check_issued(ctx, x, pobj->data.x509)) 531 { 532 *issuer = pobj->data.x509; 533 X509_OBJECT_up_ref_count(pobj); 534 return 1; 535 } 536 } 537 return 0; 538} 539 540int X509_STORE_set_flags(X509_STORE *ctx, unsigned long flags) 541 { 542 return X509_VERIFY_PARAM_set_flags(ctx->param, flags); 543 } 544 545int X509_STORE_set_depth(X509_STORE *ctx, int depth) 546 { 547 X509_VERIFY_PARAM_set_depth(ctx->param, depth); 548 return 1; 549 } 550 551int X509_STORE_set_purpose(X509_STORE *ctx, int purpose) 552 { 553 return X509_VERIFY_PARAM_set_purpose(ctx->param, purpose); 554 } 555 556int X509_STORE_set_trust(X509_STORE *ctx, int trust) 557 { 558 return X509_VERIFY_PARAM_set_trust(ctx->param, trust); 559 } 560 561int X509_STORE_set1_param(X509_STORE *ctx, X509_VERIFY_PARAM *param) 562 { 563 return X509_VERIFY_PARAM_set1(ctx->param, param); 564 } 565 566IMPLEMENT_STACK_OF(X509_LOOKUP) 567IMPLEMENT_STACK_OF(X509_OBJECT) 568