crypto/x509/x509_lu.c

   1 /*
   2  * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include "internal/cryptlib.h"
  12 #include "internal/refcount.h"
  13 #include <openssl/x509.h>
  14 #include "internal/x509_int.h"
  15 #include <openssl/x509v3.h>
  16 #include "x509_lcl.h"
  17
  18 X509_LOOKUP *X509_LOOKUP_new(X509_LOOKUP_METHOD *method)
  19 {
  20     X509_LOOKUP *ret = OPENSSL_zalloc(sizeof(*ret));
  21
  22     if (ret == NULL) {
  23         X509err(X509_F_X509_LOOKUP_NEW, ERR_R_MALLOC_FAILURE);
  24         return NULL;
  25     }
  26
  27     ret->method = method;
  28     if (method->new_item != NULL && method->new_item(ret) == 0) {
  29         OPENSSL_free(ret);
  30         return NULL;
  31     }
  32     return ret;
  33 }
  34
  35 void X509_LOOKUP_free(X509_LOOKUP *ctx)
  36 {
  37     if (ctx == NULL)
  38         return;
  39     if ((ctx->method != NULL) && (ctx->method->free != NULL))
  40         (*ctx->method->free) (ctx);
  41     OPENSSL_free(ctx);
  42 }
  43
  44 int X509_STORE_lock(X509_STORE *s)
  45 {
  46     return CRYPTO_THREAD_write_lock(s->lock);
  47 }
  48
  49 int X509_STORE_unlock(X509_STORE *s)
  50 {
  51     return CRYPTO_THREAD_unlock(s->lock);
  52 }
  53
  54 int X509_LOOKUP_init(X509_LOOKUP *ctx)
  55 {
  56     if (ctx->method == NULL)
  57         return 0;
  58     if (ctx->method->init != NULL)
  59         return ctx->method->init(ctx);
  60     else
  61         return 1;
  62 }
  63
  64 int X509_LOOKUP_shutdown(X509_LOOKUP *ctx)
  65 {
  66     if (ctx->method == NULL)
  67         return 0;
  68     if (ctx->method->shutdown != NULL)
  69         return ctx->method->shutdown(ctx);
  70     else
  71         return 1;
  72 }
  73
  74 int X509_LOOKUP_ctrl(X509_LOOKUP *ctx, int cmd, const char *argc, long argl,
  75                      char **ret)
  76 {
  77     if (ctx->method == NULL)
  78         return -1;
  79     if (ctx->method->ctrl != NULL)
  80         return ctx->method->ctrl(ctx, cmd, argc, argl, ret);
  81     else
  82         return 1;
  83 }
  84
  85 int X509_LOOKUP_by_subject(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
  86                            X509_NAME *name, X509_OBJECT *ret)
  87 {
  88     if ((ctx->method == NULL) || (ctx->method->get_by_subject == NULL))
  89         return 0;
  90     if (ctx->skip)
  91         return 0;
  92     return ctx->method->get_by_subject(ctx, type, name, ret);
  93 }
  94
  95 int X509_LOOKUP_by_issuer_serial(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
  96                                  X509_NAME *name, ASN1_INTEGER *serial,
  97                                  X509_OBJECT *ret)
  98 {
  99     if ((ctx->method == NULL) || (ctx->method->get_by_issuer_serial == NULL))
 100         return 0;
 101     return ctx->method->get_by_issuer_serial(ctx, type, name, serial, ret);
 102 }
 103
 104 int X509_LOOKUP_by_fingerprint(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
 105                                const unsigned char *bytes, int len,
 106                                X509_OBJECT *ret)
 107 {
 108     if ((ctx->method == NULL) || (ctx->method->get_by_fingerprint == NULL))
 109         return 0;
 110     return ctx->method->get_by_fingerprint(ctx, type, bytes, len, ret);
 111 }
 112
 113 int X509_LOOKUP_by_alias(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
 114                          const char *str, int len, X509_OBJECT *ret)
 115 {
 116     if ((ctx->method == NULL) || (ctx->method->get_by_alias == NULL))
 117         return 0;
 118     return ctx->method->get_by_alias(ctx, type, str, len, ret);
 119 }
 120
 121 static int x509_object_cmp(const X509_OBJECT *const *a,
 122                            const X509_OBJECT *const *b)
 123 {
 124     int ret;
 125
 126     ret = ((*a)->type - (*b)->type);
 127     if (ret)
 128         return ret;
 129     switch ((*a)->type) {
 130     case X509_LU_X509:
 131         ret = X509_subject_name_cmp((*a)->data.x509, (*b)->data.x509);
 132         break;
 133     case X509_LU_CRL:
 134         ret = X509_CRL_cmp((*a)->data.crl, (*b)->data.crl);
 135         break;
 136     case X509_LU_NONE:
 137         /* abort(); */
 138         return 0;
 139     }
 140     return ret;
 141 }
 142
 143 X509_STORE *X509_STORE_new(void)
 144 {
 145     X509_STORE *ret = OPENSSL_zalloc(sizeof(*ret));
 146
 147     if (ret == NULL) {
 148         X509err(X509_F_X509_STORE_NEW, ERR_R_MALLOC_FAILURE);
 149         return NULL;
 150     }
 151     if ((ret->objs = sk_X509_OBJECT_new(x509_object_cmp)) == NULL) {
 152         X509err(X509_F_X509_STORE_NEW, ERR_R_MALLOC_FAILURE);
 153         goto err;
 154     }
 155     ret->cache = 1;
 156     if ((ret->get_cert_methods = sk_X509_LOOKUP_new_null()) == NULL) {
 157         X509err(X509_F_X509_STORE_NEW, ERR_R_MALLOC_FAILURE);
 158         goto err;
 159     }
 160
 161     if ((ret->param = X509_VERIFY_PARAM_new()) == NULL) {
 162         X509err(X509_F_X509_STORE_NEW, ERR_R_MALLOC_FAILURE);
 163         goto err;
 164     }
 165     if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509_STORE, ret, &ret->ex_data)) {
 166         X509err(X509_F_X509_STORE_NEW, ERR_R_MALLOC_FAILURE);
 167         goto err;
 168     }
 169
 170     ret->lock = CRYPTO_THREAD_lock_new();
 171     if (ret->lock == NULL) {
 172         X509err(X509_F_X509_STORE_NEW, ERR_R_MALLOC_FAILURE);
 173         goto err;
 174     }
 175
 176     ret->references = 1;
 177     return ret;
 178
 179 err:
 180     X509_VERIFY_PARAM_free(ret->param);
 181     sk_X509_OBJECT_free(ret->objs);
 182     sk_X509_LOOKUP_free(ret->get_cert_methods);
 183     OPENSSL_free(ret);
 184     return NULL;
 185 }
 186
 187 void X509_STORE_free(X509_STORE *vfy)
 188 {
 189     int i;
 190     STACK_OF(X509_LOOKUP) *sk;
 191     X509_LOOKUP *lu;
 192
 193     if (vfy == NULL)
 194         return;
 195     CRYPTO_DOWN_REF(&vfy->references, &i, vfy->lock);
 196     REF_PRINT_COUNT("X509_STORE", vfy);
 197     if (i > 0)
 198         return;
 199     REF_ASSERT_ISNT(i < 0);
 200
 201     sk = vfy->get_cert_methods;
 202     for (i = 0; i < sk_X509_LOOKUP_num(sk); i++) {
 203         lu = sk_X509_LOOKUP_value(sk, i);
 204         X509_LOOKUP_shutdown(lu);
 205         X509_LOOKUP_free(lu);
 206     }
 207     sk_X509_LOOKUP_free(sk);
 208     sk_X509_OBJECT_pop_free(vfy->objs, X509_OBJECT_free);
 209
 210     CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509_STORE, vfy, &vfy->ex_data);
 211     X509_VERIFY_PARAM_free(vfy->param);
 212     CRYPTO_THREAD_lock_free(vfy->lock);
 213     OPENSSL_free(vfy);
 214 }
 215
 216 int X509_STORE_up_ref(X509_STORE *vfy)
 217 {
 218     int i;
 219
 220     if (CRYPTO_UP_REF(&vfy->references, &i, vfy->lock) <= 0)
 221         return 0;
 222
 223     REF_PRINT_COUNT("X509_STORE", a);
 224     REF_ASSERT_ISNT(i < 2);
 225     return ((i > 1) ? 1 : 0);
 226 }
 227
 228 X509_LOOKUP *X509_STORE_add_lookup(X509_STORE *v, X509_LOOKUP_METHOD *m)
 229 {
 230     int i;
 231     STACK_OF(X509_LOOKUP) *sk;
 232     X509_LOOKUP *lu;
 233
 234     sk = v->get_cert_methods;
 235     for (i = 0; i < sk_X509_LOOKUP_num(sk); i++) {
 236         lu = sk_X509_LOOKUP_value(sk, i);
 237         if (m == lu->method) {
 238             return lu;
 239         }
 240     }
 241     /* a new one */
 242     lu = X509_LOOKUP_new(m);
 243     if (lu == NULL) {
 244         X509err(X509_F_X509_STORE_ADD_LOOKUP, ERR_R_MALLOC_FAILURE);
 245         return NULL;
 246     }
 247
 248     lu->store_ctx = v;
 249     if (sk_X509_LOOKUP_push(v->get_cert_methods, lu))
 250         return lu;
 251     /* malloc failed */
 252     X509err(X509_F_X509_STORE_ADD_LOOKUP, ERR_R_MALLOC_FAILURE);
 253     X509_LOOKUP_free(lu);
 254     return NULL;
 255 }
 256
 257 X509_OBJECT *X509_STORE_CTX_get_obj_by_subject(X509_STORE_CTX *vs,
 258                                                X509_LOOKUP_TYPE type,
 259                                                X509_NAME *name)
 260 {
 261     X509_OBJECT *ret = X509_OBJECT_new();
 262
 263     if (ret == NULL)
 264         return NULL;
 265     if (!X509_STORE_CTX_get_by_subject(vs, type, name, ret)) {
 266         X509_OBJECT_free(ret);
 267         return NULL;
 268     }
 269     return ret;
 270 }
 271
 272 int X509_STORE_CTX_get_by_subject(X509_STORE_CTX *vs, X509_LOOKUP_TYPE type,
 273                                   X509_NAME *name, X509_OBJECT *ret)
 274 {
 275     X509_STORE *ctx = vs->ctx;
 276     X509_LOOKUP *lu;
 277     X509_OBJECT stmp, *tmp;
 278     int i, j;
 279
 280     if (ctx == NULL)
 281         return 0;
 282
 283     CRYPTO_THREAD_write_lock(ctx->lock);
 284     tmp = X509_OBJECT_retrieve_by_subject(ctx->objs, type, name);
 285     CRYPTO_THREAD_unlock(ctx->lock);
 286
 287     if (tmp == NULL || type == X509_LU_CRL) {
 288         for (i = 0; i < sk_X509_LOOKUP_num(ctx->get_cert_methods); i++) {
 289             lu = sk_X509_LOOKUP_value(ctx->get_cert_methods, i);
 290             j = X509_LOOKUP_by_subject(lu, type, name, &stmp);
 291             if (j) {
 292                 tmp = &stmp;
 293                 break;
 294             }
 295         }
 296         if (tmp == NULL)
 297             return 0;
 298     }
 299
 300     ret->type = tmp->type;
 301     ret->data.ptr = tmp->data.ptr;
 302
 303     X509_OBJECT_up_ref_count(ret);
 304
 305     return 1;
 306 }
 307
 308 static int x509_store_add(X509_STORE *ctx, void *x, int crl) {
 309     X509_OBJECT *obj;
 310     int ret = 0, added = 0;
 311
 312     if (x == NULL)
 313         return 0;
 314     obj = X509_OBJECT_new();
 315     if (obj == NULL)
 316         return 0;
 317
 318     if (crl) {
 319         obj->type = X509_LU_CRL;
 320         obj->data.crl = (X509_CRL *)x;
 321     } else {
 322         obj->type = X509_LU_X509;
 323         obj->data.x509 = (X509 *)x;
 324     }
 325     X509_OBJECT_up_ref_count(obj);
 326
 327     CRYPTO_THREAD_write_lock(ctx->lock);
 328
 329     if (X509_OBJECT_retrieve_match(ctx->objs, obj)) {
 330         ret = 1;
 331     } else {
 332         added = sk_X509_OBJECT_push(ctx->objs, obj);
 333         ret = added != 0;
 334     }
 335
 336     CRYPTO_THREAD_unlock(ctx->lock);
 337
 338     if (added == 0)             /* obj not pushed */
 339         X509_OBJECT_free(obj);
 340
 341     return ret;
 342 }
 343
 344 int X509_STORE_add_cert(X509_STORE *ctx, X509 *x)
 345 {
 346     if (!x509_store_add(ctx, x, 0)) {
 347         X509err(X509_F_X509_STORE_ADD_CERT, ERR_R_MALLOC_FAILURE);
 348         return 0;
 349     }
 350     return 1;
 351 }
 352
 353 int X509_STORE_add_crl(X509_STORE *ctx, X509_CRL *x)
 354 {
 355     if (!x509_store_add(ctx, x, 1)) {
 356         X509err(X509_F_X509_STORE_ADD_CRL, ERR_R_MALLOC_FAILURE);
 357         return 0;
 358     }
 359     return 1;
 360 }
 361
 362 int X509_OBJECT_up_ref_count(X509_OBJECT *a)
 363 {
 364     switch (a->type) {
 365     case X509_LU_NONE:
 366         break;
 367     case X509_LU_X509:
 368         return X509_up_ref(a->data.x509);
 369     case X509_LU_CRL:
 370         return X509_CRL_up_ref(a->data.crl);
 371     }
 372     return 1;
 373 }
 374
 375 X509 *X509_OBJECT_get0_X509(const X509_OBJECT *a)
 376 {
 377     if (a == NULL || a->type != X509_LU_X509)
 378         return NULL;
 379     return a->data.x509;
 380 }
 381
 382 X509_CRL *X509_OBJECT_get0_X509_CRL(X509_OBJECT *a)
 383 {
 384     if (a == NULL || a->type != X509_LU_CRL)
 385         return NULL;
 386     return a->data.crl;
 387 }
 388
 389 X509_LOOKUP_TYPE X509_OBJECT_get_type(const X509_OBJECT *a)
 390 {
 391     return a->type;
 392 }
 393
 394 X509_OBJECT *X509_OBJECT_new()
 395 {
 396     X509_OBJECT *ret = OPENSSL_zalloc(sizeof(*ret));
 397
 398     if (ret == NULL) {
 399         X509err(X509_F_X509_OBJECT_NEW, ERR_R_MALLOC_FAILURE);
 400         return NULL;
 401     }
 402     ret->type = X509_LU_NONE;
 403     return ret;
 404 }
 405
 406
 407 void X509_OBJECT_free(X509_OBJECT *a)
 408 {
 409     if (a == NULL)
 410         return;
 411     switch (a->type) {
 412     case X509_LU_NONE:
 413         break;
 414     case X509_LU_X509:
 415         X509_free(a->data.x509);
 416         break;
 417     case X509_LU_CRL:
 418         X509_CRL_free(a->data.crl);
 419         break;
 420     }
 421     OPENSSL_free(a);
 422 }
 423
 424 static int x509_object_idx_cnt(STACK_OF(X509_OBJECT) *h, X509_LOOKUP_TYPE type,
 425                                X509_NAME *name, int *pnmatch)
 426 {
 427     X509_OBJECT stmp;
 428     X509 x509_s;
 429     X509_CRL crl_s;
 430     int idx;
 431
 432     stmp.type = type;
 433     switch (type) {
 434     case X509_LU_X509:
 435         stmp.data.x509 = &x509_s;
 436         x509_s.cert_info.subject = name;
 437         break;
 438     case X509_LU_CRL:
 439         stmp.data.crl = &crl_s;
 440         crl_s.crl.issuer = name;
 441         break;
 442     case X509_LU_NONE:
 443         /* abort(); */
 444         return -1;
 445     }
 446
 447     idx = sk_X509_OBJECT_find(h, &stmp);
 448     if (idx >= 0 && pnmatch) {
 449         int tidx;
 450         const X509_OBJECT *tobj, *pstmp;
 451         *pnmatch = 1;
 452         pstmp = &stmp;
 453         for (tidx = idx + 1; tidx < sk_X509_OBJECT_num(h); tidx++) {
 454             tobj = sk_X509_OBJECT_value(h, tidx);
 455             if (x509_object_cmp(&tobj, &pstmp))
 456                 break;
 457             (*pnmatch)++;
 458         }
 459     }
 460     return idx;
 461 }
 462
 463 int X509_OBJECT_idx_by_subject(STACK_OF(X509_OBJECT) *h, X509_LOOKUP_TYPE type,
 464                                X509_NAME *name)
 465 {
 466     return x509_object_idx_cnt(h, type, name, NULL);
 467 }
 468
 469 X509_OBJECT *X509_OBJECT_retrieve_by_subject(STACK_OF(X509_OBJECT) *h,
 470                                              X509_LOOKUP_TYPE type,
 471                                              X509_NAME *name)
 472 {
 473     int idx;
 474     idx = X509_OBJECT_idx_by_subject(h, type, name);
 475     if (idx == -1)
 476         return NULL;
 477     return sk_X509_OBJECT_value(h, idx);
 478 }
 479
 480 STACK_OF(X509_OBJECT) *X509_STORE_get0_objects(X509_STORE *v)
 481 {
 482     return v->objs;
 483 }
 484
 485 STACK_OF(X509) *X509_STORE_CTX_get1_certs(X509_STORE_CTX *ctx, X509_NAME *nm)
 486 {
 487     int i, idx, cnt;
 488     STACK_OF(X509) *sk = NULL;
 489     X509 *x;
 490     X509_OBJECT *obj;
 491
 492     if (ctx->ctx == NULL)
 493         return NULL;
 494
 495     CRYPTO_THREAD_write_lock(ctx->ctx->lock);
 496     idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_X509, nm, &cnt);
 497     if (idx < 0) {
 498         /*
 499          * Nothing found in cache: do lookup to possibly add new objects to
 500          * cache
 501          */
 502         X509_OBJECT *xobj = X509_OBJECT_new();
 503
 504         CRYPTO_THREAD_unlock(ctx->ctx->lock);
 505         if (xobj == NULL)
 506             return NULL;
 507         if (!X509_STORE_CTX_get_by_subject(ctx, X509_LU_X509, nm, xobj)) {
 508             X509_OBJECT_free(xobj);
 509             return NULL;
 510         }
 511         X509_OBJECT_free(xobj);
 512         CRYPTO_THREAD_write_lock(ctx->ctx->lock);
 513         idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_X509, nm, &cnt);
 514         if (idx < 0) {
 515             CRYPTO_THREAD_unlock(ctx->ctx->lock);
 516             return NULL;
 517         }
 518     }
 519
 520     sk = sk_X509_new_null();
 521     for (i = 0; i < cnt; i++, idx++) {
 522         obj = sk_X509_OBJECT_value(ctx->ctx->objs, idx);
 523         x = obj->data.x509;
 524         X509_up_ref(x);
 525         if (!sk_X509_push(sk, x)) {
 526             CRYPTO_THREAD_unlock(ctx->ctx->lock);
 527             X509_free(x);
 528             sk_X509_pop_free(sk, X509_free);
 529             return NULL;
 530         }
 531     }
 532     CRYPTO_THREAD_unlock(ctx->ctx->lock);
 533     return sk;
 534 }
 535
 536 STACK_OF(X509_CRL) *X509_STORE_CTX_get1_crls(X509_STORE_CTX *ctx, X509_NAME *nm)
 537 {
 538     int i, idx, cnt;
 539     STACK_OF(X509_CRL) *sk = sk_X509_CRL_new_null();
 540     X509_CRL *x;
 541     X509_OBJECT *obj, *xobj = X509_OBJECT_new();
 542
 543     /* Always do lookup to possibly add new CRLs to cache */
 544     if (sk == NULL
 545             || xobj == NULL
 546             || ctx->ctx == NULL
 547             || !X509_STORE_CTX_get_by_subject(ctx, X509_LU_CRL, nm, xobj)) {
 548         X509_OBJECT_free(xobj);
 549         sk_X509_CRL_free(sk);
 550         return NULL;
 551     }
 552     X509_OBJECT_free(xobj);
 553     CRYPTO_THREAD_write_lock(ctx->ctx->lock);
 554     idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_CRL, nm, &cnt);
 555     if (idx < 0) {
 556         CRYPTO_THREAD_unlock(ctx->ctx->lock);
 557         sk_X509_CRL_free(sk);
 558         return NULL;
 559     }
 560
 561     for (i = 0; i < cnt; i++, idx++) {
 562         obj = sk_X509_OBJECT_value(ctx->ctx->objs, idx);
 563         x = obj->data.crl;
 564         X509_CRL_up_ref(x);
 565         if (!sk_X509_CRL_push(sk, x)) {
 566             CRYPTO_THREAD_unlock(ctx->ctx->lock);
 567             X509_CRL_free(x);
 568             sk_X509_CRL_pop_free(sk, X509_CRL_free);
 569             return NULL;
 570         }
 571     }
 572     CRYPTO_THREAD_unlock(ctx->ctx->lock);
 573     return sk;
 574 }
 575
 576 X509_OBJECT *X509_OBJECT_retrieve_match(STACK_OF(X509_OBJECT) *h,
 577                                         X509_OBJECT *x)
 578 {
 579     int idx, i;
 580     X509_OBJECT *obj;
 581     idx = sk_X509_OBJECT_find(h, x);
 582     if (idx == -1)
 583         return NULL;
 584     if ((x->type != X509_LU_X509) && (x->type != X509_LU_CRL))
 585         return sk_X509_OBJECT_value(h, idx);
 586     for (i = idx; i < sk_X509_OBJECT_num(h); i++) {
 587         obj = sk_X509_OBJECT_value(h, i);
 588         if (x509_object_cmp
 589             ((const X509_OBJECT **)&obj, (const X509_OBJECT **)&x))
 590             return NULL;
 591         if (x->type == X509_LU_X509) {
 592             if (!X509_cmp(obj->data.x509, x->data.x509))
 593                 return obj;
 594         } else if (x->type == X509_LU_CRL) {
 595             if (!X509_CRL_match(obj->data.crl, x->data.crl))
 596                 return obj;
 597         } else
 598             return obj;
 599     }
 600     return NULL;
 601 }
 602
 603 /*-
 604  * Try to get issuer certificate from store. Due to limitations
 605  * of the API this can only retrieve a single certificate matching
 606  * a given subject name. However it will fill the cache with all
 607  * matching certificates, so we can examine the cache for all
 608  * matches.
 609  *
 610  * Return values are:
 611  *  1 lookup successful.
 612  *  0 certificate not found.
 613  * -1 some other error.
 614  */
 615 int X509_STORE_CTX_get1_issuer(X509 **issuer, X509_STORE_CTX *ctx, X509 *x)
 616 {
 617     X509_NAME *xn;
 618     X509_OBJECT *obj = X509_OBJECT_new(), *pobj = NULL;
 619     int i, ok, idx, ret;
 620
 621     if (obj == NULL)
 622         return -1;
 623     *issuer = NULL;
 624     xn = X509_get_issuer_name(x);
 625     ok = X509_STORE_CTX_get_by_subject(ctx, X509_LU_X509, xn, obj);
 626     if (ok != 1) {
 627         X509_OBJECT_free(obj);
 628         return 0;
 629     }
 630     /* If certificate matches all OK */
 631     if (ctx->check_issued(ctx, x, obj->data.x509)) {
 632         if (x509_check_cert_time(ctx, obj->data.x509, -1)) {
 633             *issuer = obj->data.x509;
 634             X509_up_ref(*issuer);
 635             X509_OBJECT_free(obj);
 636             return 1;
 637         }
 638     }
 639     X509_OBJECT_free(obj);
 640
 641     if (ctx->ctx == NULL)
 642         return 0;
 643
 644     /* Else find index of first cert accepted by 'check_issued' */
 645     ret = 0;
 646     CRYPTO_THREAD_write_lock(ctx->ctx->lock);
 647     idx = X509_OBJECT_idx_by_subject(ctx->ctx->objs, X509_LU_X509, xn);
 648     if (idx != -1) {            /* should be true as we've had at least one
 649                                  * match */
 650         /* Look through all matching certs for suitable issuer */
 651         for (i = idx; i < sk_X509_OBJECT_num(ctx->ctx->objs); i++) {
 652             pobj = sk_X509_OBJECT_value(ctx->ctx->objs, i);
 653             /* See if we've run past the matches */
 654             if (pobj->type != X509_LU_X509)
 655                 break;
 656             if (X509_NAME_cmp(xn, X509_get_subject_name(pobj->data.x509)))
 657                 break;
 658             if (ctx->check_issued(ctx, x, pobj->data.x509)) {
 659                 *issuer = pobj->data.x509;
 660                 ret = 1;
 661                 /*
 662                  * If times check, exit with match,
 663                  * otherwise keep looking. Leave last
 664                  * match in issuer so we return nearest
 665                  * match if no certificate time is OK.
 666                  */
 667
 668                 if (x509_check_cert_time(ctx, *issuer, -1))
 669                     break;
 670             }
 671         }
 672     }
 673     CRYPTO_THREAD_unlock(ctx->ctx->lock);
 674     if (*issuer)
 675         X509_up_ref(*issuer);
 676     return ret;
 677 }
 678
 679 int X509_STORE_set_flags(X509_STORE *ctx, unsigned long flags)
 680 {
 681     return X509_VERIFY_PARAM_set_flags(ctx->param, flags);
 682 }
 683
 684 int X509_STORE_set_depth(X509_STORE *ctx, int depth)
 685 {
 686     X509_VERIFY_PARAM_set_depth(ctx->param, depth);
 687     return 1;
 688 }
 689
 690 int X509_STORE_set_purpose(X509_STORE *ctx, int purpose)
 691 {
 692     return X509_VERIFY_PARAM_set_purpose(ctx->param, purpose);
 693 }
 694
 695 int X509_STORE_set_trust(X509_STORE *ctx, int trust)
 696 {
 697     return X509_VERIFY_PARAM_set_trust(ctx->param, trust);
 698 }
 699
 700 int X509_STORE_set1_param(X509_STORE *ctx, X509_VERIFY_PARAM *param)
 701 {
 702     return X509_VERIFY_PARAM_set1(ctx->param, param);
 703 }
 704
 705 X509_VERIFY_PARAM *X509_STORE_get0_param(X509_STORE *ctx)
 706 {
 707     return ctx->param;
 708 }
 709
 710 void X509_STORE_set_verify(X509_STORE *ctx, X509_STORE_CTX_verify_fn verify)
 711 {
 712     ctx->verify = verify;
 713 }
 714
 715 X509_STORE_CTX_verify_fn X509_STORE_get_verify(X509_STORE *ctx)
 716 {
 717     return ctx->verify;
 718 }
 719
 720 void X509_STORE_set_verify_cb(X509_STORE *ctx,
 721                               X509_STORE_CTX_verify_cb verify_cb)
 722 {
 723     ctx->verify_cb = verify_cb;
 724 }
 725
 726 X509_STORE_CTX_verify_cb X509_STORE_get_verify_cb(X509_STORE *ctx)
 727 {
 728     return ctx->verify_cb;
 729 }
 730
 731 void X509_STORE_set_get_issuer(X509_STORE *ctx,
 732                                X509_STORE_CTX_get_issuer_fn get_issuer)
 733 {
 734     ctx->get_issuer = get_issuer;
 735 }
 736
 737 X509_STORE_CTX_get_issuer_fn X509_STORE_get_get_issuer(X509_STORE *ctx)
 738 {
 739     return ctx->get_issuer;
 740 }
 741
 742 void X509_STORE_set_check_issued(X509_STORE *ctx,
 743                                  X509_STORE_CTX_check_issued_fn check_issued)
 744 {
 745     ctx->check_issued = check_issued;
 746 }
 747
 748 X509_STORE_CTX_check_issued_fn X509_STORE_get_check_issued(X509_STORE *ctx)
 749 {
 750     return ctx->check_issued;
 751 }
 752
 753 void X509_STORE_set_check_revocation(X509_STORE *ctx,
 754                                      X509_STORE_CTX_check_revocation_fn check_revocation)
 755 {
 756     ctx->check_revocation = check_revocation;
 757 }
 758
 759 X509_STORE_CTX_check_revocation_fn X509_STORE_get_check_revocation(X509_STORE *ctx)
 760 {
 761     return ctx->check_revocation;
 762 }
 763
 764 void X509_STORE_set_get_crl(X509_STORE *ctx,
 765                             X509_STORE_CTX_get_crl_fn get_crl)
 766 {
 767     ctx->get_crl = get_crl;
 768 }
 769
 770 X509_STORE_CTX_get_crl_fn X509_STORE_get_get_crl(X509_STORE *ctx)
 771 {
 772     return ctx->get_crl;
 773 }
 774
 775 void X509_STORE_set_check_crl(X509_STORE *ctx,
 776                               X509_STORE_CTX_check_crl_fn check_crl)
 777 {
 778     ctx->check_crl = check_crl;
 779 }
 780
 781 X509_STORE_CTX_check_crl_fn X509_STORE_get_check_crl(X509_STORE *ctx)
 782 {
 783     return ctx->check_crl;
 784 }
 785
 786 void X509_STORE_set_cert_crl(X509_STORE *ctx,
 787                              X509_STORE_CTX_cert_crl_fn cert_crl)
 788 {
 789     ctx->cert_crl = cert_crl;
 790 }
 791
 792 X509_STORE_CTX_cert_crl_fn X509_STORE_get_cert_crl(X509_STORE *ctx)
 793 {
 794     return ctx->cert_crl;
 795 }
 796
 797 void X509_STORE_set_check_policy(X509_STORE *ctx,
 798                                  X509_STORE_CTX_check_policy_fn check_policy)
 799 {
 800     ctx->check_policy = check_policy;
 801 }
 802
 803 X509_STORE_CTX_check_policy_fn X509_STORE_get_check_policy(X509_STORE *ctx)
 804 {
 805     return ctx->check_policy;
 806 }
 807
 808 void X509_STORE_set_lookup_certs(X509_STORE *ctx,
 809                                  X509_STORE_CTX_lookup_certs_fn lookup_certs)
 810 {
 811     ctx->lookup_certs = lookup_certs;
 812 }
 813
 814 X509_STORE_CTX_lookup_certs_fn X509_STORE_get_lookup_certs(X509_STORE *ctx)
 815 {
 816     return ctx->lookup_certs;
 817 }
 818
 819 void X509_STORE_set_lookup_crls(X509_STORE *ctx,
 820                                 X509_STORE_CTX_lookup_crls_fn lookup_crls)
 821 {
 822     ctx->lookup_crls = lookup_crls;
 823 }
 824
 825 X509_STORE_CTX_lookup_crls_fn X509_STORE_get_lookup_crls(X509_STORE *ctx)
 826 {
 827     return ctx->lookup_crls;
 828 }
 829
 830 void X509_STORE_set_cleanup(X509_STORE *ctx,
 831                             X509_STORE_CTX_cleanup_fn ctx_cleanup)
 832 {
 833     ctx->cleanup = ctx_cleanup;
 834 }
 835
 836 X509_STORE_CTX_cleanup_fn X509_STORE_get_cleanup(X509_STORE *ctx)
 837 {
 838     return ctx->cleanup;
 839 }
 840
 841 int X509_STORE_set_ex_data(X509_STORE *ctx, int idx, void *data)
 842 {
 843     return CRYPTO_set_ex_data(&ctx->ex_data, idx, data);
 844 }
 845
 846 void *X509_STORE_get_ex_data(X509_STORE *ctx, int idx)
 847 {
 848     return CRYPTO_get_ex_data(&ctx->ex_data, idx);
 849 }
 850
 851 X509_STORE *X509_STORE_CTX_get0_store(X509_STORE_CTX *ctx)
 852 {
 853     return ctx->ctx;
 854 }