crypto/openssl/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->lookup_certs = 0;
 200         ret->lookup_crls = 0;
 201         ret->cleanup = 0;
 202
 203         if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509_STORE, ret, &ret->ex_data))
 204                 {
 205                 sk_X509_OBJECT_free(ret->objs);
 206                 OPENSSL_free(ret);
 207                 return NULL;
 208                 }
 209
 210         ret->references=1;
 211         return ret;
 212         }
 213
 214 static void cleanup(X509_OBJECT *a)
 215         {
 216         if (a->type == X509_LU_X509)
 217                 {
 218                 X509_free(a->data.x509);
 219                 }
 220         else if (a->type == X509_LU_CRL)
 221                 {
 222                 X509_CRL_free(a->data.crl);
 223                 }
 224         else
 225                 {
 226                 /* abort(); */
 227                 }
 228
 229         OPENSSL_free(a);
 230         }
 231
 232 void X509_STORE_free(X509_STORE *vfy)
 233         {
 234         int i;
 235         STACK_OF(X509_LOOKUP) *sk;
 236         X509_LOOKUP *lu;
 237
 238         if (vfy == NULL)
 239             return;
 240
 241         sk=vfy->get_cert_methods;
 242         for (i=0; i<sk_X509_LOOKUP_num(sk); i++)
 243                 {
 244                 lu=sk_X509_LOOKUP_value(sk,i);
 245                 X509_LOOKUP_shutdown(lu);
 246                 X509_LOOKUP_free(lu);
 247                 }
 248         sk_X509_LOOKUP_free(sk);
 249         sk_X509_OBJECT_pop_free(vfy->objs, cleanup);
 250
 251         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509_STORE, vfy, &vfy->ex_data);
 252         if (vfy->param)
 253                 X509_VERIFY_PARAM_free(vfy->param);
 254         OPENSSL_free(vfy);
 255         }
 256
 257 X509_LOOKUP *X509_STORE_add_lookup(X509_STORE *v, X509_LOOKUP_METHOD *m)
 258         {
 259         int i;
 260         STACK_OF(X509_LOOKUP) *sk;
 261         X509_LOOKUP *lu;
 262
 263         sk=v->get_cert_methods;
 264         for (i=0; i<sk_X509_LOOKUP_num(sk); i++)
 265                 {
 266                 lu=sk_X509_LOOKUP_value(sk,i);
 267                 if (m == lu->method)
 268                         {
 269                         return lu;
 270                         }
 271                 }
 272         /* a new one */
 273         lu=X509_LOOKUP_new(m);
 274         if (lu == NULL)
 275                 return NULL;
 276         else
 277                 {
 278                 lu->store_ctx=v;
 279                 if (sk_X509_LOOKUP_push(v->get_cert_methods,lu))
 280                         return lu;
 281                 else
 282                         {
 283                         X509_LOOKUP_free(lu);
 284                         return NULL;
 285                         }
 286                 }
 287         }
 288
 289 int X509_STORE_get_by_subject(X509_STORE_CTX *vs, int type, X509_NAME *name,
 290              X509_OBJECT *ret)
 291         {
 292         X509_STORE *ctx=vs->ctx;
 293         X509_LOOKUP *lu;
 294         X509_OBJECT stmp,*tmp;
 295         int i,j;
 296
 297         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 298         tmp=X509_OBJECT_retrieve_by_subject(ctx->objs,type,name);
 299         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 300
 301         if (tmp == NULL || type == X509_LU_CRL)
 302                 {
 303                 for (i=vs->current_method; i<sk_X509_LOOKUP_num(ctx->get_cert_methods); i++)
 304                         {
 305                         lu=sk_X509_LOOKUP_value(ctx->get_cert_methods,i);
 306                         j=X509_LOOKUP_by_subject(lu,type,name,&stmp);
 307                         if (j < 0)
 308                                 {
 309                                 vs->current_method=j;
 310                                 return j;
 311                                 }
 312                         else if (j)
 313                                 {
 314                                 tmp= &stmp;
 315                                 break;
 316                                 }
 317                         }
 318                 vs->current_method=0;
 319                 if (tmp == NULL)
 320                         return 0;
 321                 }
 322
 323 /*      if (ret->data.ptr != NULL)
 324                 X509_OBJECT_free_contents(ret); */
 325
 326         ret->type=tmp->type;
 327         ret->data.ptr=tmp->data.ptr;
 328
 329         X509_OBJECT_up_ref_count(ret);
 330
 331         return 1;
 332         }
 333
 334 int X509_STORE_add_cert(X509_STORE *ctx, X509 *x)
 335         {
 336         X509_OBJECT *obj;
 337         int ret=1;
 338
 339         if (x == NULL) return 0;
 340         obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));
 341         if (obj == NULL)
 342                 {
 343                 X509err(X509_F_X509_STORE_ADD_CERT,ERR_R_MALLOC_FAILURE);
 344                 return 0;
 345                 }
 346         obj->type=X509_LU_X509;
 347         obj->data.x509=x;
 348
 349         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 350
 351         X509_OBJECT_up_ref_count(obj);
 352
 353         if (X509_OBJECT_retrieve_match(ctx->objs, obj))
 354                 {
 355                 X509_OBJECT_free_contents(obj);
 356                 OPENSSL_free(obj);
 357                 X509err(X509_F_X509_STORE_ADD_CERT,X509_R_CERT_ALREADY_IN_HASH_TABLE);
 358                 ret=0;
 359                 }
 360         else sk_X509_OBJECT_push(ctx->objs, obj);
 361
 362         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 363
 364         return ret;
 365         }
 366
 367 int X509_STORE_add_crl(X509_STORE *ctx, X509_CRL *x)
 368         {
 369         X509_OBJECT *obj;
 370         int ret=1;
 371
 372         if (x == NULL) return 0;
 373         obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));
 374         if (obj == NULL)
 375                 {
 376                 X509err(X509_F_X509_STORE_ADD_CRL,ERR_R_MALLOC_FAILURE);
 377                 return 0;
 378                 }
 379         obj->type=X509_LU_CRL;
 380         obj->data.crl=x;
 381
 382         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 383
 384         X509_OBJECT_up_ref_count(obj);
 385
 386         if (X509_OBJECT_retrieve_match(ctx->objs, obj))
 387                 {
 388                 X509_OBJECT_free_contents(obj);
 389                 OPENSSL_free(obj);
 390                 X509err(X509_F_X509_STORE_ADD_CRL,X509_R_CERT_ALREADY_IN_HASH_TABLE);
 391                 ret=0;
 392                 }
 393         else sk_X509_OBJECT_push(ctx->objs, obj);
 394
 395         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 396
 397         return ret;
 398         }
 399
 400 void X509_OBJECT_up_ref_count(X509_OBJECT *a)
 401         {
 402         switch (a->type)
 403                 {
 404         case X509_LU_X509:
 405                 CRYPTO_add(&a->data.x509->references,1,CRYPTO_LOCK_X509);
 406                 break;
 407         case X509_LU_CRL:
 408                 CRYPTO_add(&a->data.crl->references,1,CRYPTO_LOCK_X509_CRL);
 409                 break;
 410                 }
 411         }
 412
 413 void X509_OBJECT_free_contents(X509_OBJECT *a)
 414         {
 415         switch (a->type)
 416                 {
 417         case X509_LU_X509:
 418                 X509_free(a->data.x509);
 419                 break;
 420         case X509_LU_CRL:
 421                 X509_CRL_free(a->data.crl);
 422                 break;
 423                 }
 424         }
 425
 426 static int x509_object_idx_cnt(STACK_OF(X509_OBJECT) *h, int type,
 427              X509_NAME *name, int *pnmatch)
 428         {
 429         X509_OBJECT stmp;
 430         X509 x509_s;
 431         X509_CINF cinf_s;
 432         X509_CRL crl_s;
 433         X509_CRL_INFO crl_info_s;
 434         int idx;
 435
 436         stmp.type=type;
 437         switch (type)
 438                 {
 439         case X509_LU_X509:
 440                 stmp.data.x509= &x509_s;
 441                 x509_s.cert_info= &cinf_s;
 442                 cinf_s.subject=name;
 443                 break;
 444         case X509_LU_CRL:
 445                 stmp.data.crl= &crl_s;
 446                 crl_s.crl= &crl_info_s;
 447                 crl_info_s.issuer=name;
 448                 break;
 449         default:
 450                 /* abort(); */
 451                 return -1;
 452                 }
 453
 454         idx = sk_X509_OBJECT_find(h,&stmp);
 455         if (idx >= 0 && pnmatch)
 456                 {
 457                 int tidx;
 458                 const X509_OBJECT *tobj, *pstmp;
 459                 *pnmatch = 1;
 460                 pstmp = &stmp;
 461                 for (tidx = idx + 1; tidx < sk_X509_OBJECT_num(h); tidx++)
 462                         {
 463                         tobj = sk_X509_OBJECT_value(h, tidx);
 464                         if (x509_object_cmp(&tobj, &pstmp))
 465                                 break;
 466                         (*pnmatch)++;
 467                         }
 468                 }
 469         return idx;
 470         }
 471
 472
 473 int X509_OBJECT_idx_by_subject(STACK_OF(X509_OBJECT) *h, int type,
 474              X509_NAME *name)
 475         {
 476         return x509_object_idx_cnt(h, type, name, NULL);
 477         }
 478
 479 X509_OBJECT *X509_OBJECT_retrieve_by_subject(STACK_OF(X509_OBJECT) *h, int type,
 480              X509_NAME *name)
 481         {
 482         int idx;
 483         idx = X509_OBJECT_idx_by_subject(h, type, name);
 484         if (idx==-1) return NULL;
 485         return sk_X509_OBJECT_value(h, idx);
 486         }
 487
 488 STACK_OF(X509)* X509_STORE_get1_certs(X509_STORE_CTX *ctx, X509_NAME *nm)
 489         {
 490         int i, idx, cnt;
 491         STACK_OF(X509) *sk;
 492         X509 *x;
 493         X509_OBJECT *obj;
 494         sk = sk_X509_new_null();
 495         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 496         idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_X509, nm, &cnt);
 497         if (idx < 0)
 498                 {
 499                 /* Nothing found in cache: do lookup to possibly add new
 500                  * objects to cache
 501                  */
 502                 X509_OBJECT xobj;
 503                 CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 504                 if (!X509_STORE_get_by_subject(ctx, X509_LU_X509, nm, &xobj))
 505                         {
 506                         sk_X509_free(sk);
 507                         return NULL;
 508                         }
 509                 X509_OBJECT_free_contents(&xobj);
 510                 CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 511                 idx = x509_object_idx_cnt(ctx->ctx->objs,X509_LU_X509,nm, &cnt);
 512                 if (idx < 0)
 513                         {
 514                         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 515                         sk_X509_free(sk);
 516                         return NULL;
 517                         }
 518                 }
 519         for (i = 0; i < cnt; i++, idx++)
 520                 {
 521                 obj = sk_X509_OBJECT_value(ctx->ctx->objs, idx);
 522                 x = obj->data.x509;
 523                 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
 524                 if (!sk_X509_push(sk, x))
 525                         {
 526                         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 527                         X509_free(x);
 528                         sk_X509_pop_free(sk, X509_free);
 529                         return NULL;
 530                         }
 531                 }
 532         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 533         return sk;
 534
 535         }
 536
 537 STACK_OF(X509_CRL)* X509_STORE_get1_crls(X509_STORE_CTX *ctx, X509_NAME *nm)
 538         {
 539         int i, idx, cnt;
 540         STACK_OF(X509_CRL) *sk;
 541         X509_CRL *x;
 542         X509_OBJECT *obj, xobj;
 543         sk = sk_X509_CRL_new_null();
 544         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 545         /* Check cache first */
 546         idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_CRL, nm, &cnt);
 547
 548         /* Always do lookup to possibly add new CRLs to cache
 549          */
 550         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 551         if (!X509_STORE_get_by_subject(ctx, X509_LU_CRL, nm, &xobj))
 552                 {
 553                 sk_X509_CRL_free(sk);
 554                 return NULL;
 555                 }
 556         X509_OBJECT_free_contents(&xobj);
 557         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 558         idx = x509_object_idx_cnt(ctx->ctx->objs,X509_LU_CRL, nm, &cnt);
 559         if (idx < 0)
 560                 {
 561                 CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 562                 sk_X509_CRL_free(sk);
 563                 return NULL;
 564                 }
 565
 566         for (i = 0; i < cnt; i++, idx++)
 567                 {
 568                 obj = sk_X509_OBJECT_value(ctx->ctx->objs, idx);
 569                 x = obj->data.crl;
 570                 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509_CRL);
 571                 if (!sk_X509_CRL_push(sk, x))
 572                         {
 573                         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 574                         X509_CRL_free(x);
 575                         sk_X509_CRL_pop_free(sk, X509_CRL_free);
 576                         return NULL;
 577                         }
 578                 }
 579         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 580         return sk;
 581         }
 582
 583 X509_OBJECT *X509_OBJECT_retrieve_match(STACK_OF(X509_OBJECT) *h, X509_OBJECT *x)
 584         {
 585         int idx, i;
 586         X509_OBJECT *obj;
 587         idx = sk_X509_OBJECT_find(h, x);
 588         if (idx == -1) return NULL;
 589         if ((x->type != X509_LU_X509) && (x->type != X509_LU_CRL))
 590                 return sk_X509_OBJECT_value(h, idx);
 591         for (i = idx; i < sk_X509_OBJECT_num(h); i++)
 592                 {
 593                 obj = sk_X509_OBJECT_value(h, i);
 594                 if (x509_object_cmp((const X509_OBJECT **)&obj, (const X509_OBJECT **)&x))
 595                         return NULL;
 596                 if (x->type == X509_LU_X509)
 597                         {
 598                         if (!X509_cmp(obj->data.x509, x->data.x509))
 599                                 return obj;
 600                         }
 601                 else if (x->type == X509_LU_CRL)
 602                         {
 603                         if (!X509_CRL_match(obj->data.crl, x->data.crl))
 604                                 return obj;
 605                         }
 606                 else
 607                         return obj;
 608                 }
 609         return NULL;
 610         }
 611
 612
 613 /* Try to get issuer certificate from store. Due to limitations
 614  * of the API this can only retrieve a single certificate matching
 615  * a given subject name. However it will fill the cache with all
 616  * matching certificates, so we can examine the cache for all
 617  * matches.
 618  *
 619  * Return values are:
 620  *  1 lookup successful.
 621  *  0 certificate not found.
 622  * -1 some other error.
 623  */
 624 int X509_STORE_CTX_get1_issuer(X509 **issuer, X509_STORE_CTX *ctx, X509 *x)
 625         {
 626         X509_NAME *xn;
 627         X509_OBJECT obj, *pobj;
 628         int i, ok, idx, ret;
 629         xn=X509_get_issuer_name(x);
 630         ok=X509_STORE_get_by_subject(ctx,X509_LU_X509,xn,&obj);
 631         if (ok != X509_LU_X509)
 632                 {
 633                 if (ok == X509_LU_RETRY)
 634                         {
 635                         X509_OBJECT_free_contents(&obj);
 636                         X509err(X509_F_X509_STORE_CTX_GET1_ISSUER,X509_R_SHOULD_RETRY);
 637                         return -1;
 638                         }
 639                 else if (ok != X509_LU_FAIL)
 640                         {
 641                         X509_OBJECT_free_contents(&obj);
 642                         /* not good :-(, break anyway */
 643                         return -1;
 644                         }
 645                 return 0;
 646                 }
 647         /* If certificate matches all OK */
 648         if (ctx->check_issued(ctx, x, obj.data.x509))
 649                 {
 650                 *issuer = obj.data.x509;
 651                 return 1;
 652                 }
 653         X509_OBJECT_free_contents(&obj);
 654
 655         /* Else find index of first cert accepted by 'check_issued' */
 656         ret = 0;
 657         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 658         idx = X509_OBJECT_idx_by_subject(ctx->ctx->objs, X509_LU_X509, xn);
 659         if (idx != -1) /* should be true as we've had at least one match */
 660                 {
 661                 /* Look through all matching certs for suitable issuer */
 662                 for (i = idx; i < sk_X509_OBJECT_num(ctx->ctx->objs); i++)
 663                         {
 664                         pobj = sk_X509_OBJECT_value(ctx->ctx->objs, i);
 665                         /* See if we've run past the matches */
 666                         if (pobj->type != X509_LU_X509)
 667                                 break;
 668                         if (X509_NAME_cmp(xn, X509_get_subject_name(pobj->data.x509)))
 669                                 break;
 670                         if (ctx->check_issued(ctx, x, pobj->data.x509))
 671                                 {
 672                                 *issuer = pobj->data.x509;
 673                                 X509_OBJECT_up_ref_count(pobj);
 674                                 ret = 1;
 675                                 break;
 676                                 }
 677                         }
 678                 }
 679         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 680         return ret;
 681         }
 682
 683 int X509_STORE_set_flags(X509_STORE *ctx, unsigned long flags)
 684         {
 685         return X509_VERIFY_PARAM_set_flags(ctx->param, flags);
 686         }
 687
 688 int X509_STORE_set_depth(X509_STORE *ctx, int depth)
 689         {
 690         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
 691         return 1;
 692         }
 693
 694 int X509_STORE_set_purpose(X509_STORE *ctx, int purpose)
 695         {
 696         return X509_VERIFY_PARAM_set_purpose(ctx->param, purpose);
 697         }
 698
 699 int X509_STORE_set_trust(X509_STORE *ctx, int trust)
 700         {
 701         return X509_VERIFY_PARAM_set_trust(ctx->param, trust);
 702         }
 703
 704 int X509_STORE_set1_param(X509_STORE *ctx, X509_VERIFY_PARAM *param)
 705         {
 706         return X509_VERIFY_PARAM_set1(ctx->param, param);
 707         }
 708
 709 void X509_STORE_set_verify_cb(X509_STORE *ctx,
 710                                   int (*verify_cb)(int, X509_STORE_CTX *))
 711         {
 712         ctx->verify_cb = verify_cb;
 713         }
 714
 715 IMPLEMENT_STACK_OF(X509_LOOKUP)
 716 IMPLEMENT_STACK_OF(X509_OBJECT)