crypto/x509/x509_lu.c

   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
  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         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509_STORE, ret, &ret->ex_data);
 202         ret->references=1;
 203         return ret;
 204         }
 205
 206 static 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
 224 void 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
 249 X509_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
 281 int 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
 324 int 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
 358 int 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
 391 void 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
 404 void 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
 417 static int x509_object_idx_cnt(STACK_OF(X509_OBJECT) *h, int type,
 418              X509_NAME *name, int *pnmatch)
 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         int idx;
 426
 427         stmp.type=type;
 428         switch (type)
 429                 {
 430         case X509_LU_X509:
 431                 stmp.data.x509= &x509_s;
 432                 x509_s.cert_info= &cinf_s;
 433                 cinf_s.subject=name;
 434                 break;
 435         case X509_LU_CRL:
 436                 stmp.data.crl= &crl_s;
 437                 crl_s.crl= &crl_info_s;
 438                 crl_info_s.issuer=name;
 439                 break;
 440         default:
 441                 /* abort(); */
 442                 return -1;
 443                 }
 444
 445         idx = sk_X509_OBJECT_find(h,&stmp);
 446         if (idx >= 0 && pnmatch)
 447                 {
 448                 int tidx;
 449                 const X509_OBJECT *tobj, *pstmp;
 450                 *pnmatch = 1;
 451                 pstmp = &stmp;
 452                 for (tidx = idx + 1; tidx < sk_X509_OBJECT_num(h); tidx++)
 453                         {
 454                         tobj = sk_X509_OBJECT_value(h, tidx);
 455                         if (!x509_object_cmp(&tobj, &pstmp))
 456                                 break;
 457                         *pnmatch++;
 458                         }
 459                 }
 460         return idx;
 461         }
 462
 463
 464 int X509_OBJECT_idx_by_subject(STACK_OF(X509_OBJECT) *h, int type,
 465              X509_NAME *name)
 466         {
 467         return x509_object_idx_cnt(h, type, name, NULL);
 468         }
 469
 470 X509_OBJECT *X509_OBJECT_retrieve_by_subject(STACK_OF(X509_OBJECT) *h, int type,
 471              X509_NAME *name)
 472 {
 473         int idx;
 474         idx = X509_OBJECT_idx_by_subject(h, type, name);
 475         if (idx==-1) return NULL;
 476         return sk_X509_OBJECT_value(h, idx);
 477 }
 478
 479 STACK_OF(X509)* X509_STORE_get_certs(X509_STORE *st, X509_NAME *nm)
 480         {
 481         int i, idx, cnt;
 482         STACK_OF(X509) *sk;
 483         X509 *x;
 484         X509_OBJECT *obj;
 485         sk = sk_X509_new_null();
 486         CRYPTO_r_lock(CRYPTO_LOCK_X509_STORE);
 487         idx = x509_object_idx_cnt(st->objs, X509_LU_X509, nm, &cnt);
 488         if (idx < 0)
 489                 {
 490                 CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
 491                 sk_X509_free(sk);
 492                 return NULL;
 493                 }
 494         for (i = 0; i < cnt; i++, idx++)
 495                 {
 496                 obj = sk_X509_OBJECT_value(st->objs, i);
 497                 x = obj->data.x509;
 498                 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
 499                 if (!sk_X509_push(sk, x))
 500                         {
 501                         CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
 502                         X509_free(x);
 503                         sk_X509_pop_free(sk, X509_free);
 504                         return NULL;
 505                         }
 506                 }
 507         CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
 508         return sk;
 509
 510         }
 511
 512 STACK_OF(X509_CRL)* X509_STORE_get_crls(X509_STORE *st, X509_NAME *nm)
 513         {
 514         int i, idx, cnt;
 515         STACK_OF(X509_CRL) *sk;
 516         X509_CRL *x;
 517         X509_OBJECT *obj;
 518         sk = sk_X509_CRL_new_null();
 519         CRYPTO_r_lock(CRYPTO_LOCK_X509_STORE);
 520         idx = x509_object_idx_cnt(st->objs, X509_LU_CRL, nm, &cnt);
 521         if (idx < 0)
 522                 {
 523                 CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
 524                 sk_X509_CRL_free(sk);
 525                 return NULL;
 526                 }
 527         for (i = 0; i < cnt; i++, idx++)
 528                 {
 529                 obj = sk_X509_OBJECT_value(st->objs, i);
 530                 x = obj->data.crl;
 531                 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509_CRL);
 532                 if (!sk_X509_CRL_push(sk, x))
 533                         {
 534                         CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
 535                         X509_CRL_free(x);
 536                         sk_X509_CRL_pop_free(sk, X509_CRL_free);
 537                         return NULL;
 538                         }
 539                 }
 540         CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
 541         return sk;
 542
 543         }
 544
 545 X509_OBJECT *X509_OBJECT_retrieve_match(STACK_OF(X509_OBJECT) *h, X509_OBJECT *x)
 546 {
 547         int idx, i;
 548         X509_OBJECT *obj;
 549         idx = sk_X509_OBJECT_find(h, x);
 550         if (idx == -1) return NULL;
 551         if ((x->type != X509_LU_X509) && (x->type != X509_LU_CRL))
 552                 return sk_X509_OBJECT_value(h, idx);
 553         for (i = idx; i < sk_X509_OBJECT_num(h); i++)
 554                 {
 555                 obj = sk_X509_OBJECT_value(h, i);
 556                 if (x509_object_cmp((const X509_OBJECT **)&obj, (const X509_OBJECT **)&x))
 557                         return NULL;
 558                 if (x->type == X509_LU_X509)
 559                         {
 560                         if (!X509_cmp(obj->data.x509, x->data.x509))
 561                                 return obj;
 562                         }
 563                 else if (x->type == X509_LU_CRL)
 564                         {
 565                         if (!X509_CRL_match(obj->data.crl, x->data.crl))
 566                                 return obj;
 567                         }
 568                 else
 569                         return obj;
 570                 }
 571         return NULL;
 572 }
 573
 574
 575 /* Try to get issuer certificate from store. Due to limitations
 576  * of the API this can only retrieve a single certificate matching
 577  * a given subject name. However it will fill the cache with all
 578  * matching certificates, so we can examine the cache for all
 579  * matches.
 580  *
 581  * Return values are:
 582  *  1 lookup successful.
 583  *  0 certificate not found.
 584  * -1 some other error.
 585  */
 586
 587
 588 int X509_STORE_CTX_get1_issuer(X509 **issuer, X509_STORE_CTX *ctx, X509 *x)
 589 {
 590         X509_NAME *xn;
 591         X509_OBJECT obj, *pobj;
 592         int i, ok, idx;
 593         xn=X509_get_issuer_name(x);
 594         ok=X509_STORE_get_by_subject(ctx,X509_LU_X509,xn,&obj);
 595         if (ok != X509_LU_X509)
 596                 {
 597                 if (ok == X509_LU_RETRY)
 598                         {
 599                         X509_OBJECT_free_contents(&obj);
 600                         X509err(X509_F_X509_STORE_CTX_GET1_ISSUER,X509_R_SHOULD_RETRY);
 601                         return -1;
 602                         }
 603                 else if (ok != X509_LU_FAIL)
 604                         {
 605                         X509_OBJECT_free_contents(&obj);
 606                         /* not good :-(, break anyway */
 607                         return -1;
 608                         }
 609                 return 0;
 610                 }
 611         /* If certificate matches all OK */
 612         if (ctx->check_issued(ctx, x, obj.data.x509))
 613                 {
 614                 *issuer = obj.data.x509;
 615                 return 1;
 616                 }
 617         X509_OBJECT_free_contents(&obj);
 618         /* Else find index of first matching cert */
 619         idx = X509_OBJECT_idx_by_subject(ctx->ctx->objs, X509_LU_X509, xn);
 620         /* This shouldn't normally happen since we already have one match */
 621         if (idx == -1) return 0;
 622
 623         /* Look through all matching certificates for a suitable issuer */
 624         for (i = idx; i < sk_X509_OBJECT_num(ctx->ctx->objs); i++)
 625                 {
 626                 pobj = sk_X509_OBJECT_value(ctx->ctx->objs, i);
 627                 /* See if we've ran out of matches */
 628                 if (pobj->type != X509_LU_X509) return 0;
 629                 if (X509_NAME_cmp(xn, X509_get_subject_name(pobj->data.x509))) return 0;
 630                 if (ctx->check_issued(ctx, x, pobj->data.x509))
 631                         {
 632                         *issuer = pobj->data.x509;
 633                         X509_OBJECT_up_ref_count(pobj);
 634                         return 1;
 635                         }
 636                 }
 637         return 0;
 638 }
 639
 640 int X509_STORE_set_flags(X509_STORE *ctx, unsigned long flags)
 641         {
 642         return X509_VERIFY_PARAM_set_flags(ctx->param, flags);
 643         }
 644
 645 int X509_STORE_set_depth(X509_STORE *ctx, int depth)
 646         {
 647         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
 648         return 1;
 649         }
 650
 651 int X509_STORE_set_purpose(X509_STORE *ctx, int purpose)
 652         {
 653         return X509_VERIFY_PARAM_set_purpose(ctx->param, purpose);
 654         }
 655
 656 int X509_STORE_set_trust(X509_STORE *ctx, int trust)
 657         {
 658         return X509_VERIFY_PARAM_set_trust(ctx->param, trust);
 659         }
 660
 661 int X509_STORE_set1_param(X509_STORE *ctx, X509_VERIFY_PARAM *param)
 662         {
 663         return X509_VERIFY_PARAM_set1(ctx->param, param);
 664         }
 665
 666 IMPLEMENT_STACK_OF(X509_LOOKUP)
 667 IMPLEMENT_STACK_OF(X509_OBJECT)