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         tmp=X509_OBJECT_retrieve_by_subject(ctx->objs,type,name);
 298
 299         if (tmp == NULL || type == X509_LU_CRL)
 300                 {
 301                 for (i=vs->current_method; i<sk_X509_LOOKUP_num(ctx->get_cert_methods); i++)
 302                         {
 303                         lu=sk_X509_LOOKUP_value(ctx->get_cert_methods,i);
 304                         j=X509_LOOKUP_by_subject(lu,type,name,&stmp);
 305                         if (j < 0)
 306                                 {
 307                                 vs->current_method=j;
 308                                 return j;
 309                                 }
 310                         else if (j)
 311                                 {
 312                                 tmp= &stmp;
 313                                 break;
 314                                 }
 315                         }
 316                 vs->current_method=0;
 317                 if (tmp == NULL)
 318                         return 0;
 319                 }
 320
 321 /*      if (ret->data.ptr != NULL)
 322                 X509_OBJECT_free_contents(ret); */
 323
 324         ret->type=tmp->type;
 325         ret->data.ptr=tmp->data.ptr;
 326
 327         X509_OBJECT_up_ref_count(ret);
 328
 329         return 1;
 330         }
 331
 332 int X509_STORE_add_cert(X509_STORE *ctx, X509 *x)
 333         {
 334         X509_OBJECT *obj;
 335         int ret=1;
 336
 337         if (x == NULL) return 0;
 338         obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));
 339         if (obj == NULL)
 340                 {
 341                 X509err(X509_F_X509_STORE_ADD_CERT,ERR_R_MALLOC_FAILURE);
 342                 return 0;
 343                 }
 344         obj->type=X509_LU_X509;
 345         obj->data.x509=x;
 346
 347         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 348
 349         X509_OBJECT_up_ref_count(obj);
 350
 351
 352         if (X509_OBJECT_retrieve_match(ctx->objs, obj))
 353                 {
 354                 X509_OBJECT_free_contents(obj);
 355                 OPENSSL_free(obj);
 356                 X509err(X509_F_X509_STORE_ADD_CERT,X509_R_CERT_ALREADY_IN_HASH_TABLE);
 357                 ret=0;
 358                 }
 359         else sk_X509_OBJECT_push(ctx->objs, obj);
 360
 361         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 362
 363         return ret;
 364         }
 365
 366 int X509_STORE_add_crl(X509_STORE *ctx, X509_CRL *x)
 367         {
 368         X509_OBJECT *obj;
 369         int ret=1;
 370
 371         if (x == NULL) return 0;
 372         obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));
 373         if (obj == NULL)
 374                 {
 375                 X509err(X509_F_X509_STORE_ADD_CRL,ERR_R_MALLOC_FAILURE);
 376                 return 0;
 377                 }
 378         obj->type=X509_LU_CRL;
 379         obj->data.crl=x;
 380
 381         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 382
 383         X509_OBJECT_up_ref_count(obj);
 384
 385         if (X509_OBJECT_retrieve_match(ctx->objs, obj))
 386                 {
 387                 X509_OBJECT_free_contents(obj);
 388                 OPENSSL_free(obj);
 389                 X509err(X509_F_X509_STORE_ADD_CRL,X509_R_CERT_ALREADY_IN_HASH_TABLE);
 390                 ret=0;
 391                 }
 392         else sk_X509_OBJECT_push(ctx->objs, obj);
 393
 394         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 395
 396         return ret;
 397         }
 398
 399 void X509_OBJECT_up_ref_count(X509_OBJECT *a)
 400         {
 401         switch (a->type)
 402                 {
 403         case X509_LU_X509:
 404                 CRYPTO_add(&a->data.x509->references,1,CRYPTO_LOCK_X509);
 405                 break;
 406         case X509_LU_CRL:
 407                 CRYPTO_add(&a->data.crl->references,1,CRYPTO_LOCK_X509_CRL);
 408                 break;
 409                 }
 410         }
 411
 412 void X509_OBJECT_free_contents(X509_OBJECT *a)
 413         {
 414         switch (a->type)
 415                 {
 416         case X509_LU_X509:
 417                 X509_free(a->data.x509);
 418                 break;
 419         case X509_LU_CRL:
 420                 X509_CRL_free(a->data.crl);
 421                 break;
 422                 }
 423         }
 424
 425 static int x509_object_idx_cnt(STACK_OF(X509_OBJECT) *h, int type,
 426              X509_NAME *name, int *pnmatch)
 427         {
 428         X509_OBJECT stmp;
 429         X509 x509_s;
 430         X509_CINF cinf_s;
 431         X509_CRL crl_s;
 432         X509_CRL_INFO crl_info_s;
 433         int idx;
 434
 435         stmp.type=type;
 436         switch (type)
 437                 {
 438         case X509_LU_X509:
 439                 stmp.data.x509= &x509_s;
 440                 x509_s.cert_info= &cinf_s;
 441                 cinf_s.subject=name;
 442                 break;
 443         case X509_LU_CRL:
 444                 stmp.data.crl= &crl_s;
 445                 crl_s.crl= &crl_info_s;
 446                 crl_info_s.issuer=name;
 447                 break;
 448         default:
 449                 /* abort(); */
 450                 return -1;
 451                 }
 452
 453         idx = sk_X509_OBJECT_find(h,&stmp);
 454         if (idx >= 0 && pnmatch)
 455                 {
 456                 int tidx;
 457                 const X509_OBJECT *tobj, *pstmp;
 458                 *pnmatch = 1;
 459                 pstmp = &stmp;
 460                 for (tidx = idx + 1; tidx < sk_X509_OBJECT_num(h); tidx++)
 461                         {
 462                         tobj = sk_X509_OBJECT_value(h, tidx);
 463                         if (x509_object_cmp(&tobj, &pstmp))
 464                                 break;
 465                         (*pnmatch)++;
 466                         }
 467                 }
 468         return idx;
 469         }
 470
 471
 472 int X509_OBJECT_idx_by_subject(STACK_OF(X509_OBJECT) *h, int type,
 473              X509_NAME *name)
 474         {
 475         return x509_object_idx_cnt(h, type, name, NULL);
 476         }
 477
 478 X509_OBJECT *X509_OBJECT_retrieve_by_subject(STACK_OF(X509_OBJECT) *h, int type,
 479              X509_NAME *name)
 480 {
 481         int idx;
 482         idx = X509_OBJECT_idx_by_subject(h, type, name);
 483         if (idx==-1) return NULL;
 484         return sk_X509_OBJECT_value(h, idx);
 485 }
 486
 487 STACK_OF(X509)* X509_STORE_get1_certs(X509_STORE_CTX *ctx, X509_NAME *nm)
 488         {
 489         int i, idx, cnt;
 490         STACK_OF(X509) *sk;
 491         X509 *x;
 492         X509_OBJECT *obj;
 493         sk = sk_X509_new_null();
 494         CRYPTO_r_lock(CRYPTO_LOCK_X509_STORE);
 495         idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_X509, nm, &cnt);
 496         if (idx < 0)
 497                 {
 498                 /* Nothing found in cache: do lookup to possibly add new
 499                  * objects to cache
 500                  */
 501                 X509_OBJECT xobj;
 502                 CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
 503                 if (!X509_STORE_get_by_subject(ctx, X509_LU_X509, nm, &xobj))
 504                         {
 505                         sk_X509_free(sk);
 506                         return NULL;
 507                         }
 508                 X509_OBJECT_free_contents(&xobj);
 509                 CRYPTO_r_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                         CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
 514                         sk_X509_free(sk);
 515                         return NULL;
 516                         }
 517                 }
 518         for (i = 0; i < cnt; i++, idx++)
 519                 {
 520                 obj = sk_X509_OBJECT_value(ctx->ctx->objs, idx);
 521                 x = obj->data.x509;
 522                 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
 523                 if (!sk_X509_push(sk, x))
 524                         {
 525                         CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
 526                         X509_free(x);
 527                         sk_X509_pop_free(sk, X509_free);
 528                         return NULL;
 529                         }
 530                 }
 531         CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
 532         return sk;
 533
 534         }
 535
 536 STACK_OF(X509_CRL)* X509_STORE_get1_crls(X509_STORE_CTX *ctx, X509_NAME *nm)
 537         {
 538         int i, idx, cnt;
 539         STACK_OF(X509_CRL) *sk;
 540         X509_CRL *x;
 541         X509_OBJECT *obj, xobj;
 542         sk = sk_X509_CRL_new_null();
 543         CRYPTO_r_lock(CRYPTO_LOCK_X509_STORE);
 544         /* Check cache first */
 545         idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_CRL, nm, &cnt);
 546
 547         /* Always do lookup to possibly add new CRLs to cache
 548          */
 549         CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
 550         if (!X509_STORE_get_by_subject(ctx, X509_LU_CRL, nm, &xobj))
 551                 {
 552                 sk_X509_CRL_free(sk);
 553                 return NULL;
 554                 }
 555         X509_OBJECT_free_contents(&xobj);
 556         CRYPTO_r_lock(CRYPTO_LOCK_X509_STORE);
 557         idx = x509_object_idx_cnt(ctx->ctx->objs,X509_LU_CRL, nm, &cnt);
 558         if (idx < 0)
 559                 {
 560                 CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
 561                 sk_X509_CRL_free(sk);
 562                 return NULL;
 563                 }
 564
 565         for (i = 0; i < cnt; i++, idx++)
 566                 {
 567                 obj = sk_X509_OBJECT_value(ctx->ctx->objs, idx);
 568                 x = obj->data.crl;
 569                 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509_CRL);
 570                 if (!sk_X509_CRL_push(sk, x))
 571                         {
 572                         CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
 573                         X509_CRL_free(x);
 574                         sk_X509_CRL_pop_free(sk, X509_CRL_free);
 575                         return NULL;
 576                         }
 577                 }
 578         CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
 579         return sk;
 580
 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
 625
 626 int X509_STORE_CTX_get1_issuer(X509 **issuer, X509_STORE_CTX *ctx, X509 *x)
 627 {
 628         X509_NAME *xn;
 629         X509_OBJECT obj, *pobj;
 630         int i, ok, idx;
 631         xn=X509_get_issuer_name(x);
 632         ok=X509_STORE_get_by_subject(ctx,X509_LU_X509,xn,&obj);
 633         if (ok != X509_LU_X509)
 634                 {
 635                 if (ok == X509_LU_RETRY)
 636                         {
 637                         X509_OBJECT_free_contents(&obj);
 638                         X509err(X509_F_X509_STORE_CTX_GET1_ISSUER,X509_R_SHOULD_RETRY);
 639                         return -1;
 640                         }
 641                 else if (ok != X509_LU_FAIL)
 642                         {
 643                         X509_OBJECT_free_contents(&obj);
 644                         /* not good :-(, break anyway */
 645                         return -1;
 646                         }
 647                 return 0;
 648                 }
 649         /* If certificate matches all OK */
 650         if (ctx->check_issued(ctx, x, obj.data.x509))
 651                 {
 652                 *issuer = obj.data.x509;
 653                 return 1;
 654                 }
 655         X509_OBJECT_free_contents(&obj);
 656         /* Else find index of first matching cert */
 657         idx = X509_OBJECT_idx_by_subject(ctx->ctx->objs, X509_LU_X509, xn);
 658         /* This shouldn't normally happen since we already have one match */
 659         if (idx == -1) return 0;
 660
 661         /* Look through all matching certificates for a 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 ran out of matches */
 666                 if (pobj->type != X509_LU_X509) return 0;
 667                 if (X509_NAME_cmp(xn, X509_get_subject_name(pobj->data.x509))) return 0;
 668                 if (ctx->check_issued(ctx, x, pobj->data.x509))
 669                         {
 670                         *issuer = pobj->data.x509;
 671                         X509_OBJECT_up_ref_count(pobj);
 672                         return 1;
 673                         }
 674                 }
 675         return 0;
 676 }
 677
 678 int X509_STORE_set_flags(X509_STORE *ctx, unsigned long flags)
 679         {
 680         return X509_VERIFY_PARAM_set_flags(ctx->param, flags);
 681         }
 682
 683 int X509_STORE_set_depth(X509_STORE *ctx, int depth)
 684         {
 685         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
 686         return 1;
 687         }
 688
 689 int X509_STORE_set_purpose(X509_STORE *ctx, int purpose)
 690         {
 691         return X509_VERIFY_PARAM_set_purpose(ctx->param, purpose);
 692         }
 693
 694 int X509_STORE_set_trust(X509_STORE *ctx, int trust)
 695         {
 696         return X509_VERIFY_PARAM_set_trust(ctx->param, trust);
 697         }
 698
 699 int X509_STORE_set1_param(X509_STORE *ctx, X509_VERIFY_PARAM *param)
 700         {
 701         return X509_VERIFY_PARAM_set1(ctx->param, param);
 702         }
 703
 704 void X509_STORE_set_verify_cb(X509_STORE *ctx,
 705                                   int (*verify_cb)(int, X509_STORE_CTX *))
 706         {
 707         ctx->verify_cb = verify_cb;
 708         }
 709
 710 IMPLEMENT_STACK_OF(X509_LOOKUP)
 711 IMPLEMENT_STACK_OF(X509_OBJECT)