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 #include "x509_lcl.h"
  65
  66 X509_LOOKUP *X509_LOOKUP_new(X509_LOOKUP_METHOD *method)
  67         {
  68         X509_LOOKUP *ret;
  69
  70         ret=(X509_LOOKUP *)OPENSSL_malloc(sizeof(X509_LOOKUP));
  71         if (ret == NULL) return NULL;
  72
  73         ret->init=0;
  74         ret->skip=0;
  75         ret->method=method;
  76         ret->method_data=NULL;
  77         ret->store_ctx=NULL;
  78         if ((method->new_item != NULL) && !method->new_item(ret))
  79                 {
  80                 OPENSSL_free(ret);
  81                 return NULL;
  82                 }
  83         return ret;
  84         }
  85
  86 void X509_LOOKUP_free(X509_LOOKUP *ctx)
  87         {
  88         if (ctx == NULL) return;
  89         if (    (ctx->method != NULL) &&
  90                 (ctx->method->free != NULL))
  91                 (*ctx->method->free)(ctx);
  92         OPENSSL_free(ctx);
  93         }
  94
  95 int X509_LOOKUP_init(X509_LOOKUP *ctx)
  96         {
  97         if (ctx->method == NULL) return 0;
  98         if (ctx->method->init != NULL)
  99                 return ctx->method->init(ctx);
 100         else
 101                 return 1;
 102         }
 103
 104 int X509_LOOKUP_shutdown(X509_LOOKUP *ctx)
 105         {
 106         if (ctx->method == NULL) return 0;
 107         if (ctx->method->shutdown != NULL)
 108                 return ctx->method->shutdown(ctx);
 109         else
 110                 return 1;
 111         }
 112
 113 int X509_LOOKUP_ctrl(X509_LOOKUP *ctx, int cmd, const char *argc, long argl,
 114              char **ret)
 115         {
 116         if (ctx->method == NULL) return -1;
 117         if (ctx->method->ctrl != NULL)
 118                 return ctx->method->ctrl(ctx,cmd,argc,argl,ret);
 119         else
 120                 return 1;
 121         }
 122
 123 int X509_LOOKUP_by_subject(X509_LOOKUP *ctx, int type, X509_NAME *name,
 124              X509_OBJECT *ret)
 125         {
 126         if ((ctx->method == NULL) || (ctx->method->get_by_subject == NULL))
 127                 return X509_LU_FAIL;
 128         if (ctx->skip) return 0;
 129         return ctx->method->get_by_subject(ctx,type,name,ret);
 130         }
 131
 132 int X509_LOOKUP_by_issuer_serial(X509_LOOKUP *ctx, int type, X509_NAME *name,
 133              ASN1_INTEGER *serial, X509_OBJECT *ret)
 134         {
 135         if ((ctx->method == NULL) ||
 136                 (ctx->method->get_by_issuer_serial == NULL))
 137                 return X509_LU_FAIL;
 138         return ctx->method->get_by_issuer_serial(ctx,type,name,serial,ret);
 139         }
 140
 141 int X509_LOOKUP_by_fingerprint(X509_LOOKUP *ctx, int type,
 142              unsigned char *bytes, int len, X509_OBJECT *ret)
 143         {
 144         if ((ctx->method == NULL) || (ctx->method->get_by_fingerprint == NULL))
 145                 return X509_LU_FAIL;
 146         return ctx->method->get_by_fingerprint(ctx,type,bytes,len,ret);
 147         }
 148
 149 int X509_LOOKUP_by_alias(X509_LOOKUP *ctx, int type, char *str, int len,
 150              X509_OBJECT *ret)
 151         {
 152         if ((ctx->method == NULL) || (ctx->method->get_by_alias == NULL))
 153                 return X509_LU_FAIL;
 154         return ctx->method->get_by_alias(ctx,type,str,len,ret);
 155         }
 156
 157
 158 static int x509_object_cmp(const X509_OBJECT * const *a, const X509_OBJECT * const *b)
 159         {
 160         int ret;
 161
 162         ret=((*a)->type - (*b)->type);
 163         if (ret) return ret;
 164         switch ((*a)->type)
 165                 {
 166         case X509_LU_X509:
 167                 ret=X509_subject_name_cmp((*a)->data.x509,(*b)->data.x509);
 168                 break;
 169         case X509_LU_CRL:
 170                 ret=X509_CRL_cmp((*a)->data.crl,(*b)->data.crl);
 171                 break;
 172         default:
 173                 /* abort(); */
 174                 return 0;
 175                 }
 176         return ret;
 177         }
 178
 179 X509_STORE *X509_STORE_new(void)
 180         {
 181         X509_STORE *ret;
 182
 183         if ((ret=(X509_STORE *)OPENSSL_malloc(sizeof(X509_STORE))) == NULL)
 184                 return NULL;
 185         ret->objs = sk_X509_OBJECT_new(x509_object_cmp);
 186         ret->cache=1;
 187         ret->get_cert_methods=sk_X509_LOOKUP_new_null();
 188         ret->verify=0;
 189         ret->verify_cb=0;
 190
 191         if ((ret->param = X509_VERIFY_PARAM_new()) == NULL)
 192                 return NULL;
 193
 194         ret->get_issuer = 0;
 195         ret->check_issued = 0;
 196         ret->check_revocation = 0;
 197         ret->get_crl = 0;
 198         ret->check_crl = 0;
 199         ret->cert_crl = 0;
 200         ret->lookup_certs = 0;
 201         ret->lookup_crls = 0;
 202         ret->cleanup = 0;
 203
 204         if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509_STORE, ret, &ret->ex_data))
 205                 {
 206                 sk_X509_OBJECT_free(ret->objs);
 207                 OPENSSL_free(ret);
 208                 return NULL;
 209                 }
 210
 211         ret->references=1;
 212         return ret;
 213         }
 214
 215 static void cleanup(X509_OBJECT *a)
 216         {
 217         if (a->type == X509_LU_X509)
 218                 {
 219                 X509_free(a->data.x509);
 220                 }
 221         else if (a->type == X509_LU_CRL)
 222                 {
 223                 X509_CRL_free(a->data.crl);
 224                 }
 225         else
 226                 {
 227                 /* abort(); */
 228                 }
 229
 230         OPENSSL_free(a);
 231         }
 232
 233 void X509_STORE_free(X509_STORE *vfy)
 234         {
 235         int i;
 236         STACK_OF(X509_LOOKUP) *sk;
 237         X509_LOOKUP *lu;
 238
 239         if (vfy == NULL)
 240             return;
 241
 242         i=CRYPTO_add(&vfy->references,-1,CRYPTO_LOCK_X509_STORE);
 243 #ifdef REF_PRINT
 244         REF_PRINT("X509_STORE",vfy);
 245 #endif
 246         if (i > 0) return;
 247 #ifdef REF_CHECK
 248         if (i < 0)
 249                 {
 250                 fprintf(stderr,"X509_STORE_free, bad reference count\n");
 251                 abort(); /* ok */
 252                 }
 253 #endif
 254
 255         sk=vfy->get_cert_methods;
 256         for (i=0; i<sk_X509_LOOKUP_num(sk); i++)
 257                 {
 258                 lu=sk_X509_LOOKUP_value(sk,i);
 259                 X509_LOOKUP_shutdown(lu);
 260                 X509_LOOKUP_free(lu);
 261                 }
 262         sk_X509_LOOKUP_free(sk);
 263         sk_X509_OBJECT_pop_free(vfy->objs, cleanup);
 264
 265         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509_STORE, vfy, &vfy->ex_data);
 266         if (vfy->param)
 267                 X509_VERIFY_PARAM_free(vfy->param);
 268         OPENSSL_free(vfy);
 269         }
 270
 271 X509_LOOKUP *X509_STORE_add_lookup(X509_STORE *v, X509_LOOKUP_METHOD *m)
 272         {
 273         int i;
 274         STACK_OF(X509_LOOKUP) *sk;
 275         X509_LOOKUP *lu;
 276
 277         sk=v->get_cert_methods;
 278         for (i=0; i<sk_X509_LOOKUP_num(sk); i++)
 279                 {
 280                 lu=sk_X509_LOOKUP_value(sk,i);
 281                 if (m == lu->method)
 282                         {
 283                         return lu;
 284                         }
 285                 }
 286         /* a new one */
 287         lu=X509_LOOKUP_new(m);
 288         if (lu == NULL)
 289                 return NULL;
 290         else
 291                 {
 292                 lu->store_ctx=v;
 293                 if (sk_X509_LOOKUP_push(v->get_cert_methods,lu))
 294                         return lu;
 295                 else
 296                         {
 297                         X509_LOOKUP_free(lu);
 298                         return NULL;
 299                         }
 300                 }
 301         }
 302
 303 int X509_STORE_get_by_subject(X509_STORE_CTX *vs, int type, X509_NAME *name,
 304              X509_OBJECT *ret)
 305         {
 306         X509_STORE *ctx=vs->ctx;
 307         X509_LOOKUP *lu;
 308         X509_OBJECT stmp,*tmp;
 309         int i,j;
 310
 311         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 312         tmp=X509_OBJECT_retrieve_by_subject(ctx->objs,type,name);
 313         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 314
 315         if (tmp == NULL || type == X509_LU_CRL)
 316                 {
 317                 for (i=vs->current_method; i<sk_X509_LOOKUP_num(ctx->get_cert_methods); i++)
 318                         {
 319                         lu=sk_X509_LOOKUP_value(ctx->get_cert_methods,i);
 320                         j=X509_LOOKUP_by_subject(lu,type,name,&stmp);
 321                         if (j < 0)
 322                                 {
 323                                 vs->current_method=j;
 324                                 return j;
 325                                 }
 326                         else if (j)
 327                                 {
 328                                 tmp= &stmp;
 329                                 break;
 330                                 }
 331                         }
 332                 vs->current_method=0;
 333                 if (tmp == NULL)
 334                         return 0;
 335                 }
 336
 337 /*-     if (ret->data.ptr != NULL)
 338                 X509_OBJECT_free_contents(ret); */
 339
 340         ret->type=tmp->type;
 341         ret->data.ptr=tmp->data.ptr;
 342
 343         X509_OBJECT_up_ref_count(ret);
 344
 345         return 1;
 346         }
 347
 348 int X509_STORE_add_cert(X509_STORE *ctx, X509 *x)
 349         {
 350         X509_OBJECT *obj;
 351         int ret=1;
 352
 353         if (x == NULL) return 0;
 354         obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));
 355         if (obj == NULL)
 356                 {
 357                 X509err(X509_F_X509_STORE_ADD_CERT,ERR_R_MALLOC_FAILURE);
 358                 return 0;
 359                 }
 360         obj->type=X509_LU_X509;
 361         obj->data.x509=x;
 362
 363         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 364
 365         X509_OBJECT_up_ref_count(obj);
 366
 367         if (X509_OBJECT_retrieve_match(ctx->objs, obj))
 368                 {
 369                 X509_OBJECT_free_contents(obj);
 370                 OPENSSL_free(obj);
 371                 X509err(X509_F_X509_STORE_ADD_CERT,X509_R_CERT_ALREADY_IN_HASH_TABLE);
 372                 ret=0;
 373                 }
 374         else sk_X509_OBJECT_push(ctx->objs, obj);
 375
 376         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 377
 378         return ret;
 379         }
 380
 381 int X509_STORE_add_crl(X509_STORE *ctx, X509_CRL *x)
 382         {
 383         X509_OBJECT *obj;
 384         int ret=1;
 385
 386         if (x == NULL) return 0;
 387         obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));
 388         if (obj == NULL)
 389                 {
 390                 X509err(X509_F_X509_STORE_ADD_CRL,ERR_R_MALLOC_FAILURE);
 391                 return 0;
 392                 }
 393         obj->type=X509_LU_CRL;
 394         obj->data.crl=x;
 395
 396         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 397
 398         X509_OBJECT_up_ref_count(obj);
 399
 400         if (X509_OBJECT_retrieve_match(ctx->objs, obj))
 401                 {
 402                 X509_OBJECT_free_contents(obj);
 403                 OPENSSL_free(obj);
 404                 X509err(X509_F_X509_STORE_ADD_CRL,X509_R_CERT_ALREADY_IN_HASH_TABLE);
 405                 ret=0;
 406                 }
 407         else sk_X509_OBJECT_push(ctx->objs, obj);
 408
 409         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 410
 411         return ret;
 412         }
 413
 414 void X509_OBJECT_up_ref_count(X509_OBJECT *a)
 415         {
 416         switch (a->type)
 417                 {
 418         case X509_LU_X509:
 419                 CRYPTO_add(&a->data.x509->references,1,CRYPTO_LOCK_X509);
 420                 break;
 421         case X509_LU_CRL:
 422                 CRYPTO_add(&a->data.crl->references,1,CRYPTO_LOCK_X509_CRL);
 423                 break;
 424                 }
 425         }
 426
 427 void X509_OBJECT_free_contents(X509_OBJECT *a)
 428         {
 429         switch (a->type)
 430                 {
 431         case X509_LU_X509:
 432                 X509_free(a->data.x509);
 433                 break;
 434         case X509_LU_CRL:
 435                 X509_CRL_free(a->data.crl);
 436                 break;
 437                 }
 438         }
 439
 440 static int x509_object_idx_cnt(STACK_OF(X509_OBJECT) *h, int type,
 441              X509_NAME *name, int *pnmatch)
 442         {
 443         X509_OBJECT stmp;
 444         X509 x509_s;
 445         X509_CINF cinf_s;
 446         X509_CRL crl_s;
 447         X509_CRL_INFO crl_info_s;
 448         int idx;
 449
 450         stmp.type=type;
 451         switch (type)
 452                 {
 453         case X509_LU_X509:
 454                 stmp.data.x509= &x509_s;
 455                 x509_s.cert_info= &cinf_s;
 456                 cinf_s.subject=name;
 457                 break;
 458         case X509_LU_CRL:
 459                 stmp.data.crl= &crl_s;
 460                 crl_s.crl= &crl_info_s;
 461                 crl_info_s.issuer=name;
 462                 break;
 463         default:
 464                 /* abort(); */
 465                 return -1;
 466                 }
 467
 468         idx = sk_X509_OBJECT_find(h,&stmp);
 469         if (idx >= 0 && pnmatch)
 470                 {
 471                 int tidx;
 472                 const X509_OBJECT *tobj, *pstmp;
 473                 *pnmatch = 1;
 474                 pstmp = &stmp;
 475                 for (tidx = idx + 1; tidx < sk_X509_OBJECT_num(h); tidx++)
 476                         {
 477                         tobj = sk_X509_OBJECT_value(h, tidx);
 478                         if (x509_object_cmp(&tobj, &pstmp))
 479                                 break;
 480                         (*pnmatch)++;
 481                         }
 482                 }
 483         return idx;
 484         }
 485
 486
 487 int X509_OBJECT_idx_by_subject(STACK_OF(X509_OBJECT) *h, int type,
 488              X509_NAME *name)
 489         {
 490         return x509_object_idx_cnt(h, type, name, NULL);
 491         }
 492
 493 X509_OBJECT *X509_OBJECT_retrieve_by_subject(STACK_OF(X509_OBJECT) *h, int type,
 494              X509_NAME *name)
 495         {
 496         int idx;
 497         idx = X509_OBJECT_idx_by_subject(h, type, name);
 498         if (idx==-1) return NULL;
 499         return sk_X509_OBJECT_value(h, idx);
 500         }
 501
 502 STACK_OF(X509) *X509_STORE_get1_certs(X509_STORE_CTX *ctx, X509_NAME *nm)
 503         {
 504         int i, idx, cnt;
 505         STACK_OF(X509) *sk;
 506         X509 *x;
 507         X509_OBJECT *obj;
 508         sk = sk_X509_new_null();
 509         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 510         idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_X509, nm, &cnt);
 511         if (idx < 0)
 512                 {
 513                 /* Nothing found in cache: do lookup to possibly add new
 514                  * objects to cache
 515                  */
 516                 X509_OBJECT xobj;
 517                 CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 518                 if (!X509_STORE_get_by_subject(ctx, X509_LU_X509, nm, &xobj))
 519                         {
 520                         sk_X509_free(sk);
 521                         return NULL;
 522                         }
 523                 X509_OBJECT_free_contents(&xobj);
 524                 CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 525                 idx = x509_object_idx_cnt(ctx->ctx->objs,X509_LU_X509,nm, &cnt);
 526                 if (idx < 0)
 527                         {
 528                         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 529                         sk_X509_free(sk);
 530                         return NULL;
 531                         }
 532                 }
 533         for (i = 0; i < cnt; i++, idx++)
 534                 {
 535                 obj = sk_X509_OBJECT_value(ctx->ctx->objs, idx);
 536                 x = obj->data.x509;
 537                 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
 538                 if (!sk_X509_push(sk, x))
 539                         {
 540                         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 541                         X509_free(x);
 542                         sk_X509_pop_free(sk, X509_free);
 543                         return NULL;
 544                         }
 545                 }
 546         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 547         return sk;
 548
 549         }
 550
 551 STACK_OF(X509_CRL) *X509_STORE_get1_crls(X509_STORE_CTX *ctx, X509_NAME *nm)
 552         {
 553         int i, idx, cnt;
 554         STACK_OF(X509_CRL) *sk;
 555         X509_CRL *x;
 556         X509_OBJECT *obj, xobj;
 557         sk = sk_X509_CRL_new_null();
 558         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 559         /* Check cache first */
 560         idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_CRL, nm, &cnt);
 561
 562         /* Always do lookup to possibly add new CRLs to cache
 563          */
 564         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 565         if (!X509_STORE_get_by_subject(ctx, X509_LU_CRL, nm, &xobj))
 566                 {
 567                 sk_X509_CRL_free(sk);
 568                 return NULL;
 569                 }
 570         X509_OBJECT_free_contents(&xobj);
 571         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 572         idx = x509_object_idx_cnt(ctx->ctx->objs,X509_LU_CRL, nm, &cnt);
 573         if (idx < 0)
 574                 {
 575                 CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 576                 sk_X509_CRL_free(sk);
 577                 return NULL;
 578                 }
 579
 580         for (i = 0; i < cnt; i++, idx++)
 581                 {
 582                 obj = sk_X509_OBJECT_value(ctx->ctx->objs, idx);
 583                 x = obj->data.crl;
 584                 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509_CRL);
 585                 if (!sk_X509_CRL_push(sk, x))
 586                         {
 587                         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 588                         X509_CRL_free(x);
 589                         sk_X509_CRL_pop_free(sk, X509_CRL_free);
 590                         return NULL;
 591                         }
 592                 }
 593         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 594         return sk;
 595         }
 596
 597 X509_OBJECT *X509_OBJECT_retrieve_match(STACK_OF(X509_OBJECT) *h, X509_OBJECT *x)
 598         {
 599         int idx, i;
 600         X509_OBJECT *obj;
 601         idx = sk_X509_OBJECT_find(h, x);
 602         if (idx == -1) return NULL;
 603         if ((x->type != X509_LU_X509) && (x->type != X509_LU_CRL))
 604                 return sk_X509_OBJECT_value(h, idx);
 605         for (i = idx; i < sk_X509_OBJECT_num(h); i++)
 606                 {
 607                 obj = sk_X509_OBJECT_value(h, i);
 608                 if (x509_object_cmp((const X509_OBJECT **)&obj, (const X509_OBJECT **)&x))
 609                         return NULL;
 610                 if (x->type == X509_LU_X509)
 611                         {
 612                         if (!X509_cmp(obj->data.x509, x->data.x509))
 613                                 return obj;
 614                         }
 615                 else if (x->type == X509_LU_CRL)
 616                         {
 617                         if (!X509_CRL_match(obj->data.crl, x->data.crl))
 618                                 return obj;
 619                         }
 620                 else
 621                         return obj;
 622                 }
 623         return NULL;
 624         }
 625
 626
 627 /*-
 628  * Try to get issuer certificate from store. Due to limitations
 629  * of the API this can only retrieve a single certificate matching
 630  * a given subject name. However it will fill the cache with all
 631  * matching certificates, so we can examine the cache for all
 632  * matches.
 633  *
 634  * Return values are:
 635  *  1 lookup successful.
 636  *  0 certificate not found.
 637  * -1 some other error.
 638  */
 639 int X509_STORE_CTX_get1_issuer(X509 **issuer, X509_STORE_CTX *ctx, X509 *x)
 640         {
 641         X509_NAME *xn;
 642         X509_OBJECT obj, *pobj;
 643         int i, ok, idx, ret;
 644         *issuer = NULL;
 645         xn=X509_get_issuer_name(x);
 646         ok=X509_STORE_get_by_subject(ctx,X509_LU_X509,xn,&obj);
 647         if (ok != X509_LU_X509)
 648                 {
 649                 if (ok == X509_LU_RETRY)
 650                         {
 651                         X509_OBJECT_free_contents(&obj);
 652                         X509err(X509_F_X509_STORE_CTX_GET1_ISSUER,X509_R_SHOULD_RETRY);
 653                         return -1;
 654                         }
 655                 else if (ok != X509_LU_FAIL)
 656                         {
 657                         X509_OBJECT_free_contents(&obj);
 658                         /* not good :-(, break anyway */
 659                         return -1;
 660                         }
 661                 return 0;
 662                 }
 663         /* If certificate matches all OK */
 664         if (ctx->check_issued(ctx, x, obj.data.x509))
 665                 {
 666                 if (x509_check_cert_time(ctx, obj.data.x509, 1))
 667                         {
 668                         *issuer = obj.data.x509;
 669                         return 1;
 670                         }
 671                 }
 672         X509_OBJECT_free_contents(&obj);
 673
 674         /* Else find index of first cert accepted by 'check_issued' */
 675         ret = 0;
 676         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 677         idx = X509_OBJECT_idx_by_subject(ctx->ctx->objs, X509_LU_X509, xn);
 678         if (idx != -1) /* should be true as we've had at least one match */
 679                 {
 680                 /* Look through all matching certs for suitable issuer */
 681                 for (i = idx; i < sk_X509_OBJECT_num(ctx->ctx->objs); i++)
 682                         {
 683                         pobj = sk_X509_OBJECT_value(ctx->ctx->objs, i);
 684                         /* See if we've run past the matches */
 685                         if (pobj->type != X509_LU_X509)
 686                                 break;
 687                         if (X509_NAME_cmp(xn, X509_get_subject_name(pobj->data.x509)))
 688                                 break;
 689                         if (ctx->check_issued(ctx, x, pobj->data.x509))
 690                                 {
 691                                 *issuer = pobj->data.x509;
 692                                 ret = 1;
 693                                 /*
 694                                  * If times check, exit with match,
 695                                  * otherwise keep looking. Leave last
 696                                  * match in issuer so we return nearest
 697                                  * match if no certificate time is OK.
 698                                  */
 699
 700                                 if (x509_check_cert_time(ctx, *issuer, 1))
 701                                         break;
 702                                 }
 703                         }
 704                 }
 705         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 706         if (*issuer)
 707                 CRYPTO_add(&(*issuer)->references,1,CRYPTO_LOCK_X509);
 708         return ret;
 709         }
 710
 711 int X509_STORE_set_flags(X509_STORE *ctx, unsigned long flags)
 712         {
 713         return X509_VERIFY_PARAM_set_flags(ctx->param, flags);
 714         }
 715
 716 int X509_STORE_set_depth(X509_STORE *ctx, int depth)
 717         {
 718         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
 719         return 1;
 720         }
 721
 722 int X509_STORE_set_purpose(X509_STORE *ctx, int purpose)
 723         {
 724         return X509_VERIFY_PARAM_set_purpose(ctx->param, purpose);
 725         }
 726
 727 int X509_STORE_set_trust(X509_STORE *ctx, int trust)
 728         {
 729         return X509_VERIFY_PARAM_set_trust(ctx->param, trust);
 730         }
 731
 732 int X509_STORE_set1_param(X509_STORE *ctx, X509_VERIFY_PARAM *param)
 733         {
 734         return X509_VERIFY_PARAM_set1(ctx->param, param);
 735         }
 736
 737 void X509_STORE_set_verify_cb(X509_STORE *ctx,
 738                                   int (*verify_cb)(int, X509_STORE_CTX *))
 739         {
 740         ctx->verify_cb = verify_cb;
 741         }
 742
 743 void X509_STORE_set_lookup_crls_cb(X509_STORE *ctx,
 744                 STACK_OF(X509_CRL)* (*cb)(X509_STORE_CTX *ctx, X509_NAME *nm))
 745         {
 746         ctx->lookup_crls = cb;
 747         }
 748
 749 X509_STORE *X509_STORE_CTX_get0_store(X509_STORE_CTX *ctx)
 750         {
 751         return ctx->ctx;
 752         }
 753
 754 IMPLEMENT_STACK_OF(X509_LOOKUP)
 755 IMPLEMENT_STACK_OF(X509_OBJECT)