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