release/src/router/openssl/crypto/x509/x509_lu.c

   1 /* crypto/x509/x509_lu.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #include <stdio.h>
  60 #include "cryptlib.h"
  61 #include <openssl/lhash.h>
  62 #include <openssl/x509.h>
  63 #include <openssl/x509v3.h>
  64
  65 X509_LOOKUP *X509_LOOKUP_new(X509_LOOKUP_METHOD *method)
  66 {
  67     X509_LOOKUP *ret;
  68
  69     ret = (X509_LOOKUP *)OPENSSL_malloc(sizeof(X509_LOOKUP));
  70     if (ret == NULL)
  71         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         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)
  88         return;
  89     if ((ctx->method != NULL) && (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)
  97         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)
 107         return 0;
 108     if (ctx->method->shutdown != NULL)
 109         return ctx->method->shutdown(ctx);
 110     else
 111         return 1;
 112 }
 113
 114 int X509_LOOKUP_ctrl(X509_LOOKUP *ctx, int cmd, const char *argc, long argl,
 115                      char **ret)
 116 {
 117     if (ctx->method == NULL)
 118         return -1;
 119     if (ctx->method->ctrl != NULL)
 120         return ctx->method->ctrl(ctx, cmd, argc, argl, ret);
 121     else
 122         return 1;
 123 }
 124
 125 int X509_LOOKUP_by_subject(X509_LOOKUP *ctx, int type, X509_NAME *name,
 126                            X509_OBJECT *ret)
 127 {
 128     if ((ctx->method == NULL) || (ctx->method->get_by_subject == NULL))
 129         return X509_LU_FAIL;
 130     if (ctx->skip)
 131         return 0;
 132     return ctx->method->get_by_subject(ctx, type, name, ret);
 133 }
 134
 135 int X509_LOOKUP_by_issuer_serial(X509_LOOKUP *ctx, int type, X509_NAME *name,
 136                                  ASN1_INTEGER *serial, X509_OBJECT *ret)
 137 {
 138     if ((ctx->method == NULL) || (ctx->method->get_by_issuer_serial == NULL))
 139         return X509_LU_FAIL;
 140     return ctx->method->get_by_issuer_serial(ctx, type, name, serial, ret);
 141 }
 142
 143 int X509_LOOKUP_by_fingerprint(X509_LOOKUP *ctx, int type,
 144                                unsigned char *bytes, int len,
 145                                X509_OBJECT *ret)
 146 {
 147     if ((ctx->method == NULL) || (ctx->method->get_by_fingerprint == NULL))
 148         return X509_LU_FAIL;
 149     return ctx->method->get_by_fingerprint(ctx, type, bytes, len, ret);
 150 }
 151
 152 int X509_LOOKUP_by_alias(X509_LOOKUP *ctx, int type, char *str, int len,
 153                          X509_OBJECT *ret)
 154 {
 155     if ((ctx->method == NULL) || (ctx->method->get_by_alias == NULL))
 156         return X509_LU_FAIL;
 157     return ctx->method->get_by_alias(ctx, type, str, len, ret);
 158 }
 159
 160 static int x509_object_cmp(const X509_OBJECT *const *a,
 161                            const X509_OBJECT *const *b)
 162 {
 163     int ret;
 164
 165     ret = ((*a)->type - (*b)->type);
 166     if (ret)
 167         return ret;
 168     switch ((*a)->type) {
 169     case X509_LU_X509:
 170         ret = X509_subject_name_cmp((*a)->data.x509, (*b)->data.x509);
 171         break;
 172     case X509_LU_CRL:
 173         ret = X509_CRL_cmp((*a)->data.crl, (*b)->data.crl);
 174         break;
 175     default:
 176         /* abort(); */
 177         return 0;
 178     }
 179     return ret;
 180 }
 181
 182 X509_STORE *X509_STORE_new(void)
 183 {
 184     X509_STORE *ret;
 185
 186     if ((ret = (X509_STORE *)OPENSSL_malloc(sizeof(X509_STORE))) == NULL)
 187         return NULL;
 188     ret->objs = sk_X509_OBJECT_new(x509_object_cmp);
 189     ret->cache = 1;
 190     ret->get_cert_methods = sk_X509_LOOKUP_new_null();
 191     ret->verify = 0;
 192     ret->verify_cb = 0;
 193
 194     if ((ret->param = X509_VERIFY_PARAM_new()) == NULL)
 195         return NULL;
 196
 197     ret->get_issuer = 0;
 198     ret->check_issued = 0;
 199     ret->check_revocation = 0;
 200     ret->get_crl = 0;
 201     ret->check_crl = 0;
 202     ret->cert_crl = 0;
 203     ret->lookup_certs = 0;
 204     ret->lookup_crls = 0;
 205     ret->cleanup = 0;
 206
 207     if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509_STORE, ret, &ret->ex_data)) {
 208         sk_X509_OBJECT_free(ret->objs);
 209         OPENSSL_free(ret);
 210         return NULL;
 211     }
 212
 213     ret->references = 1;
 214     return ret;
 215 }
 216
 217 static void cleanup(X509_OBJECT *a)
 218 {
 219     if (a->type == X509_LU_X509) {
 220         X509_free(a->data.x509);
 221     } else if (a->type == X509_LU_CRL) {
 222         X509_CRL_free(a->data.crl);
 223     } else {
 224         /* abort(); */
 225     }
 226
 227     OPENSSL_free(a);
 228 }
 229
 230 void X509_STORE_free(X509_STORE *vfy)
 231 {
 232     int i;
 233     STACK_OF(X509_LOOKUP) *sk;
 234     X509_LOOKUP *lu;
 235
 236     if (vfy == NULL)
 237         return;
 238
 239     sk = vfy->get_cert_methods;
 240     for (i = 0; i < sk_X509_LOOKUP_num(sk); i++) {
 241         lu = sk_X509_LOOKUP_value(sk, i);
 242         X509_LOOKUP_shutdown(lu);
 243         X509_LOOKUP_free(lu);
 244     }
 245     sk_X509_LOOKUP_free(sk);
 246     sk_X509_OBJECT_pop_free(vfy->objs, cleanup);
 247
 248     CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509_STORE, vfy, &vfy->ex_data);
 249     if (vfy->param)
 250         X509_VERIFY_PARAM_free(vfy->param);
 251     OPENSSL_free(vfy);
 252 }
 253
 254 X509_LOOKUP *X509_STORE_add_lookup(X509_STORE *v, X509_LOOKUP_METHOD *m)
 255 {
 256     int i;
 257     STACK_OF(X509_LOOKUP) *sk;
 258     X509_LOOKUP *lu;
 259
 260     sk = v->get_cert_methods;
 261     for (i = 0; i < sk_X509_LOOKUP_num(sk); i++) {
 262         lu = sk_X509_LOOKUP_value(sk, i);
 263         if (m == lu->method) {
 264             return lu;
 265         }
 266     }
 267     /* a new one */
 268     lu = X509_LOOKUP_new(m);
 269     if (lu == NULL)
 270         return NULL;
 271     else {
 272         lu->store_ctx = v;
 273         if (sk_X509_LOOKUP_push(v->get_cert_methods, lu))
 274             return lu;
 275         else {
 276             X509_LOOKUP_free(lu);
 277             return NULL;
 278         }
 279     }
 280 }
 281
 282 int X509_STORE_get_by_subject(X509_STORE_CTX *vs, int type, X509_NAME *name,
 283                               X509_OBJECT *ret)
 284 {
 285     X509_STORE *ctx = vs->ctx;
 286     X509_LOOKUP *lu;
 287     X509_OBJECT stmp, *tmp;
 288     int i, j;
 289
 290     CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 291     tmp = X509_OBJECT_retrieve_by_subject(ctx->objs, type, name);
 292     CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 293
 294     if (tmp == NULL || type == X509_LU_CRL) {
 295         for (i = vs->current_method;
 296              i < sk_X509_LOOKUP_num(ctx->get_cert_methods); i++) {
 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                 vs->current_method = j;
 301                 return j;
 302             } else if (j) {
 303                 tmp = &stmp;
 304                 break;
 305             }
 306         }
 307         vs->current_method = 0;
 308         if (tmp == NULL)
 309             return 0;
 310     }
 311
 312 /*- if (ret->data.ptr != NULL)
 313             X509_OBJECT_free_contents(ret); */
 314
 315     ret->type = tmp->type;
 316     ret->data.ptr = tmp->data.ptr;
 317
 318     X509_OBJECT_up_ref_count(ret);
 319
 320     return 1;
 321 }
 322
 323 int X509_STORE_add_cert(X509_STORE *ctx, X509 *x)
 324 {
 325     X509_OBJECT *obj;
 326     int ret = 1;
 327
 328     if (x == NULL)
 329         return 0;
 330     obj = (X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));
 331     if (obj == NULL) {
 332         X509err(X509_F_X509_STORE_ADD_CERT, ERR_R_MALLOC_FAILURE);
 333         return 0;
 334     }
 335     obj->type = X509_LU_X509;
 336     obj->data.x509 = x;
 337
 338     CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 339
 340     X509_OBJECT_up_ref_count(obj);
 341
 342     if (X509_OBJECT_retrieve_match(ctx->objs, obj)) {
 343         X509_OBJECT_free_contents(obj);
 344         OPENSSL_free(obj);
 345         X509err(X509_F_X509_STORE_ADD_CERT,
 346                 X509_R_CERT_ALREADY_IN_HASH_TABLE);
 347         ret = 0;
 348     } else
 349         sk_X509_OBJECT_push(ctx->objs, obj);
 350
 351     CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 352
 353     return ret;
 354 }
 355
 356 int X509_STORE_add_crl(X509_STORE *ctx, X509_CRL *x)
 357 {
 358     X509_OBJECT *obj;
 359     int ret = 1;
 360
 361     if (x == NULL)
 362         return 0;
 363     obj = (X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));
 364     if (obj == NULL) {
 365         X509err(X509_F_X509_STORE_ADD_CRL, ERR_R_MALLOC_FAILURE);
 366         return 0;
 367     }
 368     obj->type = X509_LU_CRL;
 369     obj->data.crl = x;
 370
 371     CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 372
 373     X509_OBJECT_up_ref_count(obj);
 374
 375     if (X509_OBJECT_retrieve_match(ctx->objs, obj)) {
 376         X509_OBJECT_free_contents(obj);
 377         OPENSSL_free(obj);
 378         X509err(X509_F_X509_STORE_ADD_CRL, X509_R_CERT_ALREADY_IN_HASH_TABLE);
 379         ret = 0;
 380     } else
 381         sk_X509_OBJECT_push(ctx->objs, obj);
 382
 383     CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 384
 385     return ret;
 386 }
 387
 388 void X509_OBJECT_up_ref_count(X509_OBJECT *a)
 389 {
 390     switch (a->type) {
 391     case X509_LU_X509:
 392         CRYPTO_add(&a->data.x509->references, 1, CRYPTO_LOCK_X509);
 393         break;
 394     case X509_LU_CRL:
 395         CRYPTO_add(&a->data.crl->references, 1, CRYPTO_LOCK_X509_CRL);
 396         break;
 397     }
 398 }
 399
 400 void X509_OBJECT_free_contents(X509_OBJECT *a)
 401 {
 402     switch (a->type) {
 403     case X509_LU_X509:
 404         X509_free(a->data.x509);
 405         break;
 406     case X509_LU_CRL:
 407         X509_CRL_free(a->data.crl);
 408         break;
 409     }
 410 }
 411
 412 static int x509_object_idx_cnt(STACK_OF(X509_OBJECT) *h, int type,
 413                                X509_NAME *name, int *pnmatch)
 414 {
 415     X509_OBJECT stmp;
 416     X509 x509_s;
 417     X509_CINF cinf_s;
 418     X509_CRL crl_s;
 419     X509_CRL_INFO crl_info_s;
 420     int idx;
 421
 422     stmp.type = type;
 423     switch (type) {
 424     case X509_LU_X509:
 425         stmp.data.x509 = &x509_s;
 426         x509_s.cert_info = &cinf_s;
 427         cinf_s.subject = name;
 428         break;
 429     case X509_LU_CRL:
 430         stmp.data.crl = &crl_s;
 431         crl_s.crl = &crl_info_s;
 432         crl_info_s.issuer = name;
 433         break;
 434     default:
 435         /* abort(); */
 436         return -1;
 437     }
 438
 439     idx = sk_X509_OBJECT_find(h, &stmp);
 440     if (idx >= 0 && pnmatch) {
 441         int tidx;
 442         const X509_OBJECT *tobj, *pstmp;
 443         *pnmatch = 1;
 444         pstmp = &stmp;
 445         for (tidx = idx + 1; tidx < sk_X509_OBJECT_num(h); tidx++) {
 446             tobj = sk_X509_OBJECT_value(h, tidx);
 447             if (x509_object_cmp(&tobj, &pstmp))
 448                 break;
 449             (*pnmatch)++;
 450         }
 451     }
 452     return idx;
 453 }
 454
 455 int X509_OBJECT_idx_by_subject(STACK_OF(X509_OBJECT) *h, int type,
 456                                X509_NAME *name)
 457 {
 458     return x509_object_idx_cnt(h, type, name, NULL);
 459 }
 460
 461 X509_OBJECT *X509_OBJECT_retrieve_by_subject(STACK_OF(X509_OBJECT) *h,
 462                                              int type, X509_NAME *name)
 463 {
 464     int idx;
 465     idx = X509_OBJECT_idx_by_subject(h, type, name);
 466     if (idx == -1)
 467         return NULL;
 468     return sk_X509_OBJECT_value(h, idx);
 469 }
 470
 471 STACK_OF(X509) *X509_STORE_get1_certs(X509_STORE_CTX *ctx, X509_NAME *nm)
 472 {
 473     int i, idx, cnt;
 474     STACK_OF(X509) *sk;
 475     X509 *x;
 476     X509_OBJECT *obj;
 477     sk = sk_X509_new_null();
 478     CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 479     idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_X509, nm, &cnt);
 480     if (idx < 0) {
 481         /*
 482          * Nothing found in cache: do lookup to possibly add new objects to
 483          * cache
 484          */
 485         X509_OBJECT xobj;
 486         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 487         if (!X509_STORE_get_by_subject(ctx, X509_LU_X509, nm, &xobj)) {
 488             sk_X509_free(sk);
 489             return NULL;
 490         }
 491         X509_OBJECT_free_contents(&xobj);
 492         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 493         idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_X509, nm, &cnt);
 494         if (idx < 0) {
 495             CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 496             sk_X509_free(sk);
 497             return NULL;
 498         }
 499     }
 500     for (i = 0; i < cnt; i++, idx++) {
 501         obj = sk_X509_OBJECT_value(ctx->ctx->objs, idx);
 502         x = obj->data.x509;
 503         CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
 504         if (!sk_X509_push(sk, x)) {
 505             CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 506             X509_free(x);
 507             sk_X509_pop_free(sk, X509_free);
 508             return NULL;
 509         }
 510     }
 511     CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 512     return sk;
 513
 514 }
 515
 516 STACK_OF(X509_CRL) *X509_STORE_get1_crls(X509_STORE_CTX *ctx, X509_NAME *nm)
 517 {
 518     int i, idx, cnt;
 519     STACK_OF(X509_CRL) *sk;
 520     X509_CRL *x;
 521     X509_OBJECT *obj, xobj;
 522     sk = sk_X509_CRL_new_null();
 523     CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 524     /* Check cache first */
 525     idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_CRL, nm, &cnt);
 526
 527     /*
 528      * Always do lookup to possibly add new CRLs to cache
 529      */
 530     CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 531     if (!X509_STORE_get_by_subject(ctx, X509_LU_CRL, nm, &xobj)) {
 532         sk_X509_CRL_free(sk);
 533         return NULL;
 534     }
 535     X509_OBJECT_free_contents(&xobj);
 536     CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 537     idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_CRL, nm, &cnt);
 538     if (idx < 0) {
 539         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 540         sk_X509_CRL_free(sk);
 541         return NULL;
 542     }
 543
 544     for (i = 0; i < cnt; i++, idx++) {
 545         obj = sk_X509_OBJECT_value(ctx->ctx->objs, idx);
 546         x = obj->data.crl;
 547         CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509_CRL);
 548         if (!sk_X509_CRL_push(sk, x)) {
 549             CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 550             X509_CRL_free(x);
 551             sk_X509_CRL_pop_free(sk, X509_CRL_free);
 552             return NULL;
 553         }
 554     }
 555     CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 556     return sk;
 557 }
 558
 559 X509_OBJECT *X509_OBJECT_retrieve_match(STACK_OF(X509_OBJECT) *h,
 560                                         X509_OBJECT *x)
 561 {
 562     int idx, i;
 563     X509_OBJECT *obj;
 564     idx = sk_X509_OBJECT_find(h, x);
 565     if (idx == -1)
 566         return NULL;
 567     if ((x->type != X509_LU_X509) && (x->type != X509_LU_CRL))
 568         return sk_X509_OBJECT_value(h, idx);
 569     for (i = idx; i < sk_X509_OBJECT_num(h); i++) {
 570         obj = sk_X509_OBJECT_value(h, i);
 571         if (x509_object_cmp
 572             ((const X509_OBJECT **)&obj, (const X509_OBJECT **)&x))
 573             return NULL;
 574         if (x->type == X509_LU_X509) {
 575             if (!X509_cmp(obj->data.x509, x->data.x509))
 576                 return obj;
 577         } else if (x->type == X509_LU_CRL) {
 578             if (!X509_CRL_match(obj->data.crl, x->data.crl))
 579                 return obj;
 580         } else
 581             return obj;
 582     }
 583     return NULL;
 584 }
 585
 586 /*-
 587  * Try to get issuer certificate from store. Due to limitations
 588  * of the API this can only retrieve a single certificate matching
 589  * a given subject name. However it will fill the cache with all
 590  * matching certificates, so we can examine the cache for all
 591  * matches.
 592  *
 593  * Return values are:
 594  *  1 lookup successful.
 595  *  0 certificate not found.
 596  * -1 some other error.
 597  */
 598 int X509_STORE_CTX_get1_issuer(X509 **issuer, X509_STORE_CTX *ctx, X509 *x)
 599 {
 600     X509_NAME *xn;
 601     X509_OBJECT obj, *pobj;
 602     int i, ok, idx, ret;
 603     xn = X509_get_issuer_name(x);
 604     ok = X509_STORE_get_by_subject(ctx, X509_LU_X509, xn, &obj);
 605     if (ok != X509_LU_X509) {
 606         if (ok == X509_LU_RETRY) {
 607             X509_OBJECT_free_contents(&obj);
 608             X509err(X509_F_X509_STORE_CTX_GET1_ISSUER, X509_R_SHOULD_RETRY);
 609             return -1;
 610         } else if (ok != X509_LU_FAIL) {
 611             X509_OBJECT_free_contents(&obj);
 612             /* not good :-(, break anyway */
 613             return -1;
 614         }
 615         return 0;
 616     }
 617     /* If certificate matches all OK */
 618     if (ctx->check_issued(ctx, x, obj.data.x509)) {
 619         *issuer = obj.data.x509;
 620         return 1;
 621     }
 622     X509_OBJECT_free_contents(&obj);
 623
 624     /* Else find index of first cert accepted by 'check_issued' */
 625     ret = 0;
 626     CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 627     idx = X509_OBJECT_idx_by_subject(ctx->ctx->objs, X509_LU_X509, xn);
 628     if (idx != -1) {            /* should be true as we've had at least one
 629                                  * match */
 630         /* Look through all matching certs for suitable issuer */
 631         for (i = idx; i < sk_X509_OBJECT_num(ctx->ctx->objs); i++) {
 632             pobj = sk_X509_OBJECT_value(ctx->ctx->objs, i);
 633             /* See if we've run past the matches */
 634             if (pobj->type != X509_LU_X509)
 635                 break;
 636             if (X509_NAME_cmp(xn, X509_get_subject_name(pobj->data.x509)))
 637                 break;
 638             if (ctx->check_issued(ctx, x, pobj->data.x509)) {
 639                 *issuer = pobj->data.x509;
 640                 X509_OBJECT_up_ref_count(pobj);
 641                 ret = 1;
 642                 break;
 643             }
 644         }
 645     }
 646     CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 647     return ret;
 648 }
 649
 650 int X509_STORE_set_flags(X509_STORE *ctx, unsigned long flags)
 651 {
 652     return X509_VERIFY_PARAM_set_flags(ctx->param, flags);
 653 }
 654
 655 int X509_STORE_set_depth(X509_STORE *ctx, int depth)
 656 {
 657     X509_VERIFY_PARAM_set_depth(ctx->param, depth);
 658     return 1;
 659 }
 660
 661 int X509_STORE_set_purpose(X509_STORE *ctx, int purpose)
 662 {
 663     return X509_VERIFY_PARAM_set_purpose(ctx->param, purpose);
 664 }
 665
 666 int X509_STORE_set_trust(X509_STORE *ctx, int trust)
 667 {
 668     return X509_VERIFY_PARAM_set_trust(ctx->param, trust);
 669 }
 670
 671 int X509_STORE_set1_param(X509_STORE *ctx, X509_VERIFY_PARAM *param)
 672 {
 673     return X509_VERIFY_PARAM_set1(ctx->param, param);
 674 }
 675
 676 void X509_STORE_set_verify_cb(X509_STORE *ctx,
 677                               int (*verify_cb) (int, X509_STORE_CTX *))
 678 {
 679     ctx->verify_cb = verify_cb;
 680 }
 681
 682 IMPLEMENT_STACK_OF(X509_LOOKUP)
 683
 684 IMPLEMENT_STACK_OF(X509_OBJECT)