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         i=CRYPTO_add(&vfy->references,-1,CRYPTO_LOCK_X509_STORE);
 242 #ifdef REF_PRINT
 243         REF_PRINT("X509_STORE",vfy);
 244 #endif
 245         if (i > 0) return;
 246 #ifdef REF_CHECK
 247         if (i < 0)
 248                 {
 249                 fprintf(stderr,"X509_STORE_free, bad reference count\n");
 250                 abort(); /* ok */
 251                 }
 252 #endif
 253
 254         sk=vfy->get_cert_methods;
 255         for (i=0; i<sk_X509_LOOKUP_num(sk); i++)
 256                 {
 257                 lu=sk_X509_LOOKUP_value(sk,i);
 258                 X509_LOOKUP_shutdown(lu);
 259                 X509_LOOKUP_free(lu);
 260                 }
 261         sk_X509_LOOKUP_free(sk);
 262         sk_X509_OBJECT_pop_free(vfy->objs, cleanup);
 263
 264         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509_STORE, vfy, &vfy->ex_data);
 265         if (vfy->param)
 266                 X509_VERIFY_PARAM_free(vfy->param);
 267         OPENSSL_free(vfy);
 268         }
 269
 270 X509_LOOKUP *X509_STORE_add_lookup(X509_STORE *v, X509_LOOKUP_METHOD *m)
 271         {
 272         int i;
 273         STACK_OF(X509_LOOKUP) *sk;
 274         X509_LOOKUP *lu;
 275
 276         sk=v->get_cert_methods;
 277         for (i=0; i<sk_X509_LOOKUP_num(sk); i++)
 278                 {
 279                 lu=sk_X509_LOOKUP_value(sk,i);
 280                 if (m == lu->method)
 281                         {
 282                         return lu;
 283                         }
 284                 }
 285         /* a new one */
 286         lu=X509_LOOKUP_new(m);
 287         if (lu == NULL)
 288                 return NULL;
 289         else
 290                 {
 291                 lu->store_ctx=v;
 292                 if (sk_X509_LOOKUP_push(v->get_cert_methods,lu))
 293                         return lu;
 294                 else
 295                         {
 296                         X509_LOOKUP_free(lu);
 297                         return NULL;
 298                         }
 299                 }
 300         }
 301
 302 int X509_STORE_get_by_subject(X509_STORE_CTX *vs, int type, X509_NAME *name,
 303              X509_OBJECT *ret)
 304         {
 305         X509_STORE *ctx=vs->ctx;
 306         X509_LOOKUP *lu;
 307         X509_OBJECT stmp,*tmp;
 308         int i,j;
 309
 310         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 311         tmp=X509_OBJECT_retrieve_by_subject(ctx->objs,type,name);
 312         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 313
 314         if (tmp == NULL || type == X509_LU_CRL)
 315                 {
 316                 for (i=vs->current_method; i<sk_X509_LOOKUP_num(ctx->get_cert_methods); i++)
 317                         {
 318                         lu=sk_X509_LOOKUP_value(ctx->get_cert_methods,i);
 319                         j=X509_LOOKUP_by_subject(lu,type,name,&stmp);
 320                         if (j < 0)
 321                                 {
 322                                 vs->current_method=j;
 323                                 return j;
 324                                 }
 325                         else if (j)
 326                                 {
 327                                 tmp= &stmp;
 328                                 break;
 329                                 }
 330                         }
 331                 vs->current_method=0;
 332                 if (tmp == NULL)
 333                         return 0;
 334                 }
 335
 336 /*      if (ret->data.ptr != NULL)
 337                 X509_OBJECT_free_contents(ret); */
 338
 339         ret->type=tmp->type;
 340         ret->data.ptr=tmp->data.ptr;
 341
 342         X509_OBJECT_up_ref_count(ret);
 343
 344         return 1;
 345         }
 346
 347 int X509_STORE_add_cert(X509_STORE *ctx, X509 *x)
 348         {
 349         X509_OBJECT *obj;
 350         int ret=1;
 351
 352         if (x == NULL) return 0;
 353         obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));
 354         if (obj == NULL)
 355                 {
 356                 X509err(X509_F_X509_STORE_ADD_CERT,ERR_R_MALLOC_FAILURE);
 357                 return 0;
 358                 }
 359         obj->type=X509_LU_X509;
 360         obj->data.x509=x;
 361
 362         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 363
 364         X509_OBJECT_up_ref_count(obj);
 365
 366         if (X509_OBJECT_retrieve_match(ctx->objs, obj))
 367                 {
 368                 X509_OBJECT_free_contents(obj);
 369                 OPENSSL_free(obj);
 370                 X509err(X509_F_X509_STORE_ADD_CERT,X509_R_CERT_ALREADY_IN_HASH_TABLE);
 371                 ret=0;
 372                 }
 373         else sk_X509_OBJECT_push(ctx->objs, obj);
 374
 375         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 376
 377         return ret;
 378         }
 379
 380 int X509_STORE_add_crl(X509_STORE *ctx, X509_CRL *x)
 381         {
 382         X509_OBJECT *obj;
 383         int ret=1;
 384
 385         if (x == NULL) return 0;
 386         obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));
 387         if (obj == NULL)
 388                 {
 389                 X509err(X509_F_X509_STORE_ADD_CRL,ERR_R_MALLOC_FAILURE);
 390                 return 0;
 391                 }
 392         obj->type=X509_LU_CRL;
 393         obj->data.crl=x;
 394
 395         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 396
 397         X509_OBJECT_up_ref_count(obj);
 398
 399         if (X509_OBJECT_retrieve_match(ctx->objs, obj))
 400                 {
 401                 X509_OBJECT_free_contents(obj);
 402                 OPENSSL_free(obj);
 403                 X509err(X509_F_X509_STORE_ADD_CRL,X509_R_CERT_ALREADY_IN_HASH_TABLE);
 404                 ret=0;
 405                 }
 406         else sk_X509_OBJECT_push(ctx->objs, obj);
 407
 408         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 409
 410         return ret;
 411         }
 412
 413 void X509_OBJECT_up_ref_count(X509_OBJECT *a)
 414         {
 415         switch (a->type)
 416                 {
 417         case X509_LU_X509:
 418                 CRYPTO_add(&a->data.x509->references,1,CRYPTO_LOCK_X509);
 419                 break;
 420         case X509_LU_CRL:
 421                 CRYPTO_add(&a->data.crl->references,1,CRYPTO_LOCK_X509_CRL);
 422                 break;
 423                 }
 424         }
 425
 426 void X509_OBJECT_free_contents(X509_OBJECT *a)
 427         {
 428         switch (a->type)
 429                 {
 430         case X509_LU_X509:
 431                 X509_free(a->data.x509);
 432                 break;
 433         case X509_LU_CRL:
 434                 X509_CRL_free(a->data.crl);
 435                 break;
 436                 }
 437         }
 438
 439 static int x509_object_idx_cnt(STACK_OF(X509_OBJECT) *h, int type,
 440              X509_NAME *name, int *pnmatch)
 441         {
 442         X509_OBJECT stmp;
 443         X509 x509_s;
 444         X509_CINF cinf_s;
 445         X509_CRL crl_s;
 446         X509_CRL_INFO crl_info_s;
 447         int idx;
 448
 449         stmp.type=type;
 450         switch (type)
 451                 {
 452         case X509_LU_X509:
 453                 stmp.data.x509= &x509_s;
 454                 x509_s.cert_info= &cinf_s;
 455                 cinf_s.subject=name;
 456                 break;
 457         case X509_LU_CRL:
 458                 stmp.data.crl= &crl_s;
 459                 crl_s.crl= &crl_info_s;
 460                 crl_info_s.issuer=name;
 461                 break;
 462         default:
 463                 /* abort(); */
 464                 return -1;
 465                 }
 466
 467         idx = sk_X509_OBJECT_find(h,&stmp);
 468         if (idx >= 0 && pnmatch)
 469                 {
 470                 int tidx;
 471                 const X509_OBJECT *tobj, *pstmp;
 472                 *pnmatch = 1;
 473                 pstmp = &stmp;
 474                 for (tidx = idx + 1; tidx < sk_X509_OBJECT_num(h); tidx++)
 475                         {
 476                         tobj = sk_X509_OBJECT_value(h, tidx);
 477                         if (x509_object_cmp(&tobj, &pstmp))
 478                                 break;
 479                         (*pnmatch)++;
 480                         }
 481                 }
 482         return idx;
 483         }
 484
 485
 486 int X509_OBJECT_idx_by_subject(STACK_OF(X509_OBJECT) *h, int type,
 487              X509_NAME *name)
 488         {
 489         return x509_object_idx_cnt(h, type, name, NULL);
 490         }
 491
 492 X509_OBJECT *X509_OBJECT_retrieve_by_subject(STACK_OF(X509_OBJECT) *h, int type,
 493              X509_NAME *name)
 494         {
 495         int idx;
 496         idx = X509_OBJECT_idx_by_subject(h, type, name);
 497         if (idx==-1) return NULL;
 498         return sk_X509_OBJECT_value(h, idx);
 499         }
 500
 501 STACK_OF(X509)* X509_STORE_get1_certs(X509_STORE_CTX *ctx, X509_NAME *nm)
 502         {
 503         int i, idx, cnt;
 504         STACK_OF(X509) *sk;
 505         X509 *x;
 506         X509_OBJECT *obj;
 507         sk = sk_X509_new_null();
 508         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 509         idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_X509, nm, &cnt);
 510         if (idx < 0)
 511                 {
 512                 /* Nothing found in cache: do lookup to possibly add new
 513                  * objects to cache
 514                  */
 515                 X509_OBJECT xobj;
 516                 CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 517                 if (!X509_STORE_get_by_subject(ctx, X509_LU_X509, nm, &xobj))
 518                         {
 519                         sk_X509_free(sk);
 520                         return NULL;
 521                         }
 522                 X509_OBJECT_free_contents(&xobj);
 523                 CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 524                 idx = x509_object_idx_cnt(ctx->ctx->objs,X509_LU_X509,nm, &cnt);
 525                 if (idx < 0)
 526                         {
 527                         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 528                         sk_X509_free(sk);
 529                         return NULL;
 530                         }
 531                 }
 532         for (i = 0; i < cnt; i++, idx++)
 533                 {
 534                 obj = sk_X509_OBJECT_value(ctx->ctx->objs, idx);
 535                 x = obj->data.x509;
 536                 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
 537                 if (!sk_X509_push(sk, x))
 538                         {
 539                         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 540                         X509_free(x);
 541                         sk_X509_pop_free(sk, X509_free);
 542                         return NULL;
 543                         }
 544                 }
 545         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 546         return sk;
 547
 548         }
 549
 550 STACK_OF(X509_CRL)* X509_STORE_get1_crls(X509_STORE_CTX *ctx, X509_NAME *nm)
 551         {
 552         int i, idx, cnt;
 553         STACK_OF(X509_CRL) *sk;
 554         X509_CRL *x;
 555         X509_OBJECT *obj, xobj;
 556         sk = sk_X509_CRL_new_null();
 557         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 558         /* Check cache first */
 559         idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_CRL, nm, &cnt);
 560
 561         /* Always do lookup to possibly add new CRLs to cache
 562          */
 563         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 564         if (!X509_STORE_get_by_subject(ctx, X509_LU_CRL, nm, &xobj))
 565                 {
 566                 sk_X509_CRL_free(sk);
 567                 return NULL;
 568                 }
 569         X509_OBJECT_free_contents(&xobj);
 570         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 571         idx = x509_object_idx_cnt(ctx->ctx->objs,X509_LU_CRL, nm, &cnt);
 572         if (idx < 0)
 573                 {
 574                 CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 575                 sk_X509_CRL_free(sk);
 576                 return NULL;
 577                 }
 578
 579         for (i = 0; i < cnt; i++, idx++)
 580                 {
 581                 obj = sk_X509_OBJECT_value(ctx->ctx->objs, idx);
 582                 x = obj->data.crl;
 583                 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509_CRL);
 584                 if (!sk_X509_CRL_push(sk, x))
 585                         {
 586                         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 587                         X509_CRL_free(x);
 588                         sk_X509_CRL_pop_free(sk, X509_CRL_free);
 589                         return NULL;
 590                         }
 591                 }
 592         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 593         return sk;
 594         }
 595
 596 X509_OBJECT *X509_OBJECT_retrieve_match(STACK_OF(X509_OBJECT) *h, X509_OBJECT *x)
 597         {
 598         int idx, i;
 599         X509_OBJECT *obj;
 600         idx = sk_X509_OBJECT_find(h, x);
 601         if (idx == -1) return NULL;
 602         if ((x->type != X509_LU_X509) && (x->type != X509_LU_CRL))
 603                 return sk_X509_OBJECT_value(h, idx);
 604         for (i = idx; i < sk_X509_OBJECT_num(h); i++)
 605                 {
 606                 obj = sk_X509_OBJECT_value(h, i);
 607                 if (x509_object_cmp((const X509_OBJECT **)&obj, (const X509_OBJECT **)&x))
 608                         return NULL;
 609                 if (x->type == X509_LU_X509)
 610                         {
 611                         if (!X509_cmp(obj->data.x509, x->data.x509))
 612                                 return obj;
 613                         }
 614                 else if (x->type == X509_LU_CRL)
 615                         {
 616                         if (!X509_CRL_match(obj->data.crl, x->data.crl))
 617                                 return obj;
 618                         }
 619                 else
 620                         return obj;
 621                 }
 622         return NULL;
 623         }
 624
 625
 626 /* Try to get issuer certificate from store. Due to limitations
 627  * of the API this can only retrieve a single certificate matching
 628  * a given subject name. However it will fill the cache with all
 629  * matching certificates, so we can examine the cache for all
 630  * matches.
 631  *
 632  * Return values are:
 633  *  1 lookup successful.
 634  *  0 certificate not found.
 635  * -1 some other error.
 636  */
 637 int X509_STORE_CTX_get1_issuer(X509 **issuer, X509_STORE_CTX *ctx, X509 *x)
 638         {
 639         X509_NAME *xn;
 640         X509_OBJECT obj, *pobj;
 641         int i, ok, idx, ret;
 642         xn=X509_get_issuer_name(x);
 643         ok=X509_STORE_get_by_subject(ctx,X509_LU_X509,xn,&obj);
 644         if (ok != X509_LU_X509)
 645                 {
 646                 if (ok == X509_LU_RETRY)
 647                         {
 648                         X509_OBJECT_free_contents(&obj);
 649                         X509err(X509_F_X509_STORE_CTX_GET1_ISSUER,X509_R_SHOULD_RETRY);
 650                         return -1;
 651                         }
 652                 else if (ok != X509_LU_FAIL)
 653                         {
 654                         X509_OBJECT_free_contents(&obj);
 655                         /* not good :-(, break anyway */
 656                         return -1;
 657                         }
 658                 return 0;
 659                 }
 660         /* If certificate matches all OK */
 661         if (ctx->check_issued(ctx, x, obj.data.x509))
 662                 {
 663                 *issuer = obj.data.x509;
 664                 return 1;
 665                 }
 666         X509_OBJECT_free_contents(&obj);
 667
 668         /* Else find index of first cert accepted by 'check_issued' */
 669         ret = 0;
 670         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 671         idx = X509_OBJECT_idx_by_subject(ctx->ctx->objs, X509_LU_X509, xn);
 672         if (idx != -1) /* should be true as we've had at least one match */
 673                 {
 674                 /* Look through all matching certs for suitable issuer */
 675                 for (i = idx; i < sk_X509_OBJECT_num(ctx->ctx->objs); i++)
 676                         {
 677                         pobj = sk_X509_OBJECT_value(ctx->ctx->objs, i);
 678                         /* See if we've run past the matches */
 679                         if (pobj->type != X509_LU_X509)
 680                                 break;
 681                         if (X509_NAME_cmp(xn, X509_get_subject_name(pobj->data.x509)))
 682                                 break;
 683                         if (ctx->check_issued(ctx, x, pobj->data.x509))
 684                                 {
 685                                 *issuer = pobj->data.x509;
 686                                 X509_OBJECT_up_ref_count(pobj);
 687                                 ret = 1;
 688                                 break;
 689                                 }
 690                         }
 691                 }
 692         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 693         return ret;
 694         }
 695
 696 int X509_STORE_set_flags(X509_STORE *ctx, unsigned long flags)
 697         {
 698         return X509_VERIFY_PARAM_set_flags(ctx->param, flags);
 699         }
 700
 701 int X509_STORE_set_depth(X509_STORE *ctx, int depth)
 702         {
 703         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
 704         return 1;
 705         }
 706
 707 int X509_STORE_set_purpose(X509_STORE *ctx, int purpose)
 708         {
 709         return X509_VERIFY_PARAM_set_purpose(ctx->param, purpose);
 710         }
 711
 712 int X509_STORE_set_trust(X509_STORE *ctx, int trust)
 713         {
 714         return X509_VERIFY_PARAM_set_trust(ctx->param, trust);
 715         }
 716
 717 int X509_STORE_set1_param(X509_STORE *ctx, X509_VERIFY_PARAM *param)
 718         {
 719         return X509_VERIFY_PARAM_set1(ctx->param, param);
 720         }
 721
 722 void X509_STORE_set_verify_cb(X509_STORE *ctx,
 723                                   int (*verify_cb)(int, X509_STORE_CTX *))
 724         {
 725         ctx->verify_cb = verify_cb;
 726         }
 727
 728 IMPLEMENT_STACK_OF(X509_LOOKUP)
 729 IMPLEMENT_STACK_OF(X509_OBJECT)