crypto/x509/x509_lu.c

   1 /*
   2  * Copyright 1995-2022 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (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 "crypto/x509.h"
  15 #include <openssl/x509v3.h>
  16 #include "x509_local.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         ERR_raise(ERR_LIB_X509, 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_ex(X509_LOOKUP *ctx, int cmd, const char *argc, long argl,
  75                         char **ret, OSSL_LIB_CTX *libctx, const char *propq)
  76 {
  77     if (ctx->method == NULL)
  78         return -1;
  79     if (ctx->method->ctrl_ex != NULL)
  80         return ctx->method->ctrl_ex(ctx, cmd, argc, argl, ret, libctx, propq);
  81     if (ctx->method->ctrl != NULL)
  82         return ctx->method->ctrl(ctx, cmd, argc, argl, ret);
  83     return 1;
  84 }
  85
  86 int X509_LOOKUP_ctrl(X509_LOOKUP *ctx, int cmd, const char *argc, long argl,
  87                      char **ret)
  88 {
  89     return X509_LOOKUP_ctrl_ex(ctx, cmd, argc, argl, ret, NULL, NULL);
  90 }
  91
  92 int X509_LOOKUP_by_subject_ex(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
  93                               const X509_NAME *name, X509_OBJECT *ret,
  94                               OSSL_LIB_CTX *libctx, const char *propq)
  95 {
  96     if (ctx->skip
  97         || ctx->method == NULL
  98         || (ctx->method->get_by_subject == NULL
  99             && ctx->method->get_by_subject_ex == NULL))
 100         return 0;
 101     if (ctx->method->get_by_subject_ex != NULL)
 102         return ctx->method->get_by_subject_ex(ctx, type, name, ret, libctx,
 103                                               propq);
 104     else
 105         return ctx->method->get_by_subject(ctx, type, name, ret);
 106 }
 107
 108 int X509_LOOKUP_by_subject(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
 109                            const X509_NAME *name, X509_OBJECT *ret)
 110 {
 111     return X509_LOOKUP_by_subject_ex(ctx, type, name, ret, NULL, NULL);
 112 }
 113
 114 int X509_LOOKUP_by_issuer_serial(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
 115                                  const X509_NAME *name,
 116                                  const ASN1_INTEGER *serial,
 117                                  X509_OBJECT *ret)
 118 {
 119     if ((ctx->method == NULL) || (ctx->method->get_by_issuer_serial == NULL))
 120         return 0;
 121     return ctx->method->get_by_issuer_serial(ctx, type, name, serial, ret);
 122 }
 123
 124 int X509_LOOKUP_by_fingerprint(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
 125                                const unsigned char *bytes, int len,
 126                                X509_OBJECT *ret)
 127 {
 128     if ((ctx->method == NULL) || (ctx->method->get_by_fingerprint == NULL))
 129         return 0;
 130     return ctx->method->get_by_fingerprint(ctx, type, bytes, len, ret);
 131 }
 132
 133 int X509_LOOKUP_by_alias(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
 134                          const char *str, int len, X509_OBJECT *ret)
 135 {
 136     if ((ctx->method == NULL) || (ctx->method->get_by_alias == NULL))
 137         return 0;
 138     return ctx->method->get_by_alias(ctx, type, str, len, ret);
 139 }
 140
 141 int X509_LOOKUP_set_method_data(X509_LOOKUP *ctx, void *data)
 142 {
 143     ctx->method_data = data;
 144     return 1;
 145 }
 146
 147 void *X509_LOOKUP_get_method_data(const X509_LOOKUP *ctx)
 148 {
 149     return ctx->method_data;
 150 }
 151
 152 X509_STORE *X509_LOOKUP_get_store(const X509_LOOKUP *ctx)
 153 {
 154     return ctx->store_ctx;
 155 }
 156
 157
 158 static int x509_object_cmp(const X509_OBJECT *const *a,
 159                            const X509_OBJECT *const *b)
 160 {
 161     int ret;
 162
 163     ret = ((*a)->type - (*b)->type);
 164     if (ret)
 165         return ret;
 166     switch ((*a)->type) {
 167     case X509_LU_X509:
 168         ret = X509_subject_name_cmp((*a)->data.x509, (*b)->data.x509);
 169         break;
 170     case X509_LU_CRL:
 171         ret = X509_CRL_cmp((*a)->data.crl, (*b)->data.crl);
 172         break;
 173     case X509_LU_NONE:
 174         /* abort(); */
 175         return 0;
 176     }
 177     return ret;
 178 }
 179
 180 X509_STORE *X509_STORE_new(void)
 181 {
 182     X509_STORE *ret = OPENSSL_zalloc(sizeof(*ret));
 183
 184     if (ret == NULL) {
 185         ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
 186         return NULL;
 187     }
 188     if ((ret->objs = sk_X509_OBJECT_new(x509_object_cmp)) == NULL) {
 189         ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
 190         goto err;
 191     }
 192     ret->cache = 1;
 193     if ((ret->get_cert_methods = sk_X509_LOOKUP_new_null()) == NULL) {
 194         ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
 195         goto err;
 196     }
 197
 198     if ((ret->param = X509_VERIFY_PARAM_new()) == NULL) {
 199         ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
 200         goto err;
 201     }
 202     if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509_STORE, ret, &ret->ex_data)) {
 203         ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
 204         goto err;
 205     }
 206
 207     ret->lock = CRYPTO_THREAD_lock_new();
 208     if (ret->lock == NULL) {
 209         ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
 210         goto err;
 211     }
 212     ret->references = 1;
 213     return ret;
 214
 215 err:
 216     X509_VERIFY_PARAM_free(ret->param);
 217     sk_X509_OBJECT_free(ret->objs);
 218     sk_X509_LOOKUP_free(ret->get_cert_methods);
 219     OPENSSL_free(ret);
 220     return NULL;
 221 }
 222
 223 void X509_STORE_free(X509_STORE *vfy)
 224 {
 225     int i;
 226     STACK_OF(X509_LOOKUP) *sk;
 227     X509_LOOKUP *lu;
 228
 229     if (vfy == NULL)
 230         return;
 231     CRYPTO_DOWN_REF(&vfy->references, &i, vfy->lock);
 232     REF_PRINT_COUNT("X509_STORE", vfy);
 233     if (i > 0)
 234         return;
 235     REF_ASSERT_ISNT(i < 0);
 236
 237     sk = vfy->get_cert_methods;
 238     for (i = 0; i < sk_X509_LOOKUP_num(sk); i++) {
 239         lu = sk_X509_LOOKUP_value(sk, i);
 240         X509_LOOKUP_shutdown(lu);
 241         X509_LOOKUP_free(lu);
 242     }
 243     sk_X509_LOOKUP_free(sk);
 244     sk_X509_OBJECT_pop_free(vfy->objs, X509_OBJECT_free);
 245
 246     CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509_STORE, vfy, &vfy->ex_data);
 247     X509_VERIFY_PARAM_free(vfy->param);
 248     CRYPTO_THREAD_lock_free(vfy->lock);
 249     OPENSSL_free(vfy);
 250 }
 251
 252 int X509_STORE_up_ref(X509_STORE *vfy)
 253 {
 254     int i;
 255
 256     if (CRYPTO_UP_REF(&vfy->references, &i, vfy->lock) <= 0)
 257         return 0;
 258
 259     REF_PRINT_COUNT("X509_STORE", vfy);
 260     REF_ASSERT_ISNT(i < 2);
 261     return ((i > 1) ? 1 : 0);
 262 }
 263
 264 X509_LOOKUP *X509_STORE_add_lookup(X509_STORE *v, X509_LOOKUP_METHOD *m)
 265 {
 266     int i;
 267     STACK_OF(X509_LOOKUP) *sk;
 268     X509_LOOKUP *lu;
 269
 270     sk = v->get_cert_methods;
 271     for (i = 0; i < sk_X509_LOOKUP_num(sk); i++) {
 272         lu = sk_X509_LOOKUP_value(sk, i);
 273         if (m == lu->method) {
 274             return lu;
 275         }
 276     }
 277     /* a new one */
 278     lu = X509_LOOKUP_new(m);
 279     if (lu == NULL) {
 280         ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
 281         return NULL;
 282     }
 283
 284     lu->store_ctx = v;
 285     if (sk_X509_LOOKUP_push(v->get_cert_methods, lu))
 286         return lu;
 287     /* malloc failed */
 288     ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
 289     X509_LOOKUP_free(lu);
 290     return NULL;
 291 }
 292
 293 X509_OBJECT *X509_STORE_CTX_get_obj_by_subject(X509_STORE_CTX *vs,
 294                                                X509_LOOKUP_TYPE type,
 295                                                const X509_NAME *name)
 296 {
 297     X509_OBJECT *ret = X509_OBJECT_new();
 298
 299     if (ret == NULL)
 300         return NULL;
 301     if (!X509_STORE_CTX_get_by_subject(vs, type, name, ret)) {
 302         X509_OBJECT_free(ret);
 303         return NULL;
 304     }
 305     return ret;
 306 }
 307
 308 /* Also fill the cache with all matching certificates */
 309 int X509_STORE_CTX_get_by_subject(const X509_STORE_CTX *vs,
 310                                   X509_LOOKUP_TYPE type,
 311                                   const X509_NAME *name, X509_OBJECT *ret)
 312 {
 313     X509_STORE *store = vs->store;
 314     X509_LOOKUP *lu;
 315     X509_OBJECT stmp, *tmp;
 316     int i, j;
 317
 318     if (store == NULL)
 319         return 0;
 320
 321     stmp.type = X509_LU_NONE;
 322     stmp.data.ptr = NULL;
 323
 324     if (!X509_STORE_lock(store))
 325         return 0;
 326
 327     tmp = X509_OBJECT_retrieve_by_subject(store->objs, type, name);
 328     X509_STORE_unlock(store);
 329
 330     if (tmp == NULL || type == X509_LU_CRL) {
 331         for (i = 0; i < sk_X509_LOOKUP_num(store->get_cert_methods); i++) {
 332             lu = sk_X509_LOOKUP_value(store->get_cert_methods, i);
 333             j = X509_LOOKUP_by_subject_ex(lu, type, name, &stmp, vs->libctx,
 334                                           vs->propq);
 335             if (j) {
 336                 tmp = &stmp;
 337                 break;
 338             }
 339         }
 340         if (tmp == NULL)
 341             return 0;
 342     }
 343
 344     if (!X509_OBJECT_up_ref_count(tmp))
 345         return 0;
 346
 347     ret->type = tmp->type;
 348     ret->data.ptr = tmp->data.ptr;
 349
 350     return 1;
 351 }
 352
 353 static int x509_store_add(X509_STORE *store, void *x, int crl) {
 354     X509_OBJECT *obj;
 355     int ret = 0, added = 0;
 356
 357     if (x == NULL)
 358         return 0;
 359     obj = X509_OBJECT_new();
 360     if (obj == NULL)
 361         return 0;
 362
 363     if (crl) {
 364         obj->type = X509_LU_CRL;
 365         obj->data.crl = (X509_CRL *)x;
 366     } else {
 367         obj->type = X509_LU_X509;
 368         obj->data.x509 = (X509 *)x;
 369     }
 370     if (!X509_OBJECT_up_ref_count(obj)) {
 371         obj->type = X509_LU_NONE;
 372         X509_OBJECT_free(obj);
 373         return 0;
 374     }
 375
 376     if (!X509_STORE_lock(store)) {
 377         obj->type = X509_LU_NONE;
 378         X509_OBJECT_free(obj);
 379         return 0;
 380     }
 381
 382     if (X509_OBJECT_retrieve_match(store->objs, obj)) {
 383         ret = 1;
 384     } else {
 385         added = sk_X509_OBJECT_push(store->objs, obj);
 386         ret = added != 0;
 387     }
 388     X509_STORE_unlock(store);
 389
 390     if (added == 0)             /* obj not pushed */
 391         X509_OBJECT_free(obj);
 392
 393     return ret;
 394 }
 395
 396 int X509_STORE_add_cert(X509_STORE *ctx, X509 *x)
 397 {
 398     if (!x509_store_add(ctx, x, 0)) {
 399         ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
 400         return 0;
 401     }
 402     return 1;
 403 }
 404
 405 int X509_STORE_add_crl(X509_STORE *ctx, X509_CRL *x)
 406 {
 407     if (!x509_store_add(ctx, x, 1)) {
 408         ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
 409         return 0;
 410     }
 411     return 1;
 412 }
 413
 414 int X509_OBJECT_up_ref_count(X509_OBJECT *a)
 415 {
 416     switch (a->type) {
 417     case X509_LU_NONE:
 418         break;
 419     case X509_LU_X509:
 420         return X509_up_ref(a->data.x509);
 421     case X509_LU_CRL:
 422         return X509_CRL_up_ref(a->data.crl);
 423     }
 424     return 1;
 425 }
 426
 427 X509 *X509_OBJECT_get0_X509(const X509_OBJECT *a)
 428 {
 429     if (a == NULL || a->type != X509_LU_X509)
 430         return NULL;
 431     return a->data.x509;
 432 }
 433
 434 X509_CRL *X509_OBJECT_get0_X509_CRL(const X509_OBJECT *a)
 435 {
 436     if (a == NULL || a->type != X509_LU_CRL)
 437         return NULL;
 438     return a->data.crl;
 439 }
 440
 441 X509_LOOKUP_TYPE X509_OBJECT_get_type(const X509_OBJECT *a)
 442 {
 443     return a->type;
 444 }
 445
 446 X509_OBJECT *X509_OBJECT_new(void)
 447 {
 448     X509_OBJECT *ret = OPENSSL_zalloc(sizeof(*ret));
 449
 450     if (ret == NULL) {
 451         ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
 452         return NULL;
 453     }
 454     ret->type = X509_LU_NONE;
 455     return ret;
 456 }
 457
 458 static void x509_object_free_internal(X509_OBJECT *a)
 459 {
 460     if (a == NULL)
 461         return;
 462     switch (a->type) {
 463     case X509_LU_NONE:
 464         break;
 465     case X509_LU_X509:
 466         X509_free(a->data.x509);
 467         break;
 468     case X509_LU_CRL:
 469         X509_CRL_free(a->data.crl);
 470         break;
 471     }
 472 }
 473
 474 int X509_OBJECT_set1_X509(X509_OBJECT *a, X509 *obj)
 475 {
 476     if (a == NULL || !X509_up_ref(obj))
 477         return 0;
 478
 479     x509_object_free_internal(a);
 480     a->type = X509_LU_X509;
 481     a->data.x509 = obj;
 482     return 1;
 483 }
 484
 485 int X509_OBJECT_set1_X509_CRL(X509_OBJECT *a, X509_CRL *obj)
 486 {
 487     if (a == NULL || !X509_CRL_up_ref(obj))
 488         return 0;
 489
 490     x509_object_free_internal(a);
 491     a->type = X509_LU_CRL;
 492     a->data.crl = obj;
 493     return 1;
 494 }
 495
 496 void X509_OBJECT_free(X509_OBJECT *a)
 497 {
 498     x509_object_free_internal(a);
 499     OPENSSL_free(a);
 500 }
 501
 502 static int x509_object_idx_cnt(STACK_OF(X509_OBJECT) *h, X509_LOOKUP_TYPE type,
 503                                const X509_NAME *name, int *pnmatch)
 504 {
 505     X509_OBJECT stmp;
 506     X509 x509_s;
 507     X509_CRL crl_s;
 508     int idx;
 509
 510     stmp.type = type;
 511     switch (type) {
 512     case X509_LU_X509:
 513         stmp.data.x509 = &x509_s;
 514         x509_s.cert_info.subject = (X509_NAME *)name; /* won't modify it */
 515         break;
 516     case X509_LU_CRL:
 517         stmp.data.crl = &crl_s;
 518         crl_s.crl.issuer = (X509_NAME *)name; /* won't modify it */
 519         break;
 520     case X509_LU_NONE:
 521         /* abort(); */
 522         return -1;
 523     }
 524
 525     idx = sk_X509_OBJECT_find_all(h, &stmp, pnmatch);
 526     return idx;
 527 }
 528
 529 int X509_OBJECT_idx_by_subject(STACK_OF(X509_OBJECT) *h, X509_LOOKUP_TYPE type,
 530                                const X509_NAME *name)
 531 {
 532     return x509_object_idx_cnt(h, type, name, NULL);
 533 }
 534
 535 X509_OBJECT *X509_OBJECT_retrieve_by_subject(STACK_OF(X509_OBJECT) *h,
 536                                              X509_LOOKUP_TYPE type,
 537                                              const X509_NAME *name)
 538 {
 539     int idx;
 540     idx = X509_OBJECT_idx_by_subject(h, type, name);
 541     if (idx == -1)
 542         return NULL;
 543     return sk_X509_OBJECT_value(h, idx);
 544 }
 545
 546 STACK_OF(X509_OBJECT) *X509_STORE_get0_objects(const X509_STORE *v)
 547 {
 548     return v->objs;
 549 }
 550
 551 STACK_OF(X509) *X509_STORE_get1_all_certs(X509_STORE *store)
 552 {
 553     STACK_OF(X509) *sk;
 554     STACK_OF(X509_OBJECT) *objs;
 555     int i;
 556
 557     if (store == NULL) {
 558         ERR_raise(ERR_LIB_X509, ERR_R_PASSED_NULL_PARAMETER);
 559         return NULL;
 560     }
 561     if ((sk = sk_X509_new_null()) == NULL)
 562         return NULL;
 563     if (!X509_STORE_lock(store))
 564         goto out_free;
 565
 566     objs = X509_STORE_get0_objects(store);
 567     for (i = 0; i < sk_X509_OBJECT_num(objs); i++) {
 568         X509 *cert = X509_OBJECT_get0_X509(sk_X509_OBJECT_value(objs, i));
 569
 570         if (cert != NULL
 571             && !X509_add_cert(sk, cert, X509_ADD_FLAG_UP_REF))
 572             goto err;
 573     }
 574     X509_STORE_unlock(store);
 575     return sk;
 576
 577  err:
 578     X509_STORE_unlock(store);
 579  out_free:
 580     OSSL_STACK_OF_X509_free(sk);
 581     return NULL;
 582 }
 583
 584 STACK_OF(X509) *X509_STORE_CTX_get1_certs(X509_STORE_CTX *ctx,
 585                                           const X509_NAME *nm)
 586 {
 587     int i, idx, cnt;
 588     STACK_OF(X509) *sk = NULL;
 589     X509 *x;
 590     X509_OBJECT *obj;
 591     X509_STORE *store = ctx->store;
 592
 593     if (store == NULL)
 594         return NULL;
 595
 596     if (!X509_STORE_lock(store))
 597         return NULL;
 598
 599     idx = x509_object_idx_cnt(store->objs, X509_LU_X509, nm, &cnt);
 600     if (idx < 0) {
 601         /*
 602          * Nothing found in cache: do lookup to possibly add new objects to
 603          * cache
 604          */
 605         X509_OBJECT *xobj = X509_OBJECT_new();
 606
 607         X509_STORE_unlock(store);
 608
 609         if (xobj == NULL)
 610             return NULL;
 611         if (!X509_STORE_CTX_get_by_subject(ctx, X509_LU_X509, nm, xobj)) {
 612             X509_OBJECT_free(xobj);
 613             return NULL;
 614         }
 615         X509_OBJECT_free(xobj);
 616         if (!X509_STORE_lock(store))
 617             return NULL;
 618         idx = x509_object_idx_cnt(store->objs, X509_LU_X509, nm, &cnt);
 619         if (idx < 0) {
 620             X509_STORE_unlock(store);
 621             return NULL;
 622         }
 623     }
 624
 625     sk = sk_X509_new_null();
 626     for (i = 0; i < cnt; i++, idx++) {
 627         obj = sk_X509_OBJECT_value(store->objs, idx);
 628         x = obj->data.x509;
 629         if (!X509_add_cert(sk, x, X509_ADD_FLAG_UP_REF)) {
 630             X509_STORE_unlock(store);
 631             OSSL_STACK_OF_X509_free(sk);
 632             return NULL;
 633         }
 634     }
 635     X509_STORE_unlock(store);
 636     return sk;
 637 }
 638
 639 STACK_OF(X509_CRL) *X509_STORE_CTX_get1_crls(const X509_STORE_CTX *ctx,
 640                                              const X509_NAME *nm)
 641 {
 642     int i, idx, cnt;
 643     STACK_OF(X509_CRL) *sk = sk_X509_CRL_new_null();
 644     X509_CRL *x;
 645     X509_OBJECT *obj, *xobj = X509_OBJECT_new();
 646     X509_STORE *store = ctx->store;
 647
 648     /* Always do lookup to possibly add new CRLs to cache */
 649     if (sk == NULL
 650             || xobj == NULL
 651             || store == NULL
 652             || !X509_STORE_CTX_get_by_subject(ctx, X509_LU_CRL, nm, xobj)) {
 653         X509_OBJECT_free(xobj);
 654         sk_X509_CRL_free(sk);
 655         return NULL;
 656     }
 657     X509_OBJECT_free(xobj);
 658     if (!X509_STORE_lock(store)) {
 659         sk_X509_CRL_free(sk);
 660         return NULL;
 661     }
 662     idx = x509_object_idx_cnt(store->objs, X509_LU_CRL, nm, &cnt);
 663     if (idx < 0) {
 664         X509_STORE_unlock(store);
 665         sk_X509_CRL_free(sk);
 666         return NULL;
 667     }
 668
 669     for (i = 0; i < cnt; i++, idx++) {
 670         obj = sk_X509_OBJECT_value(store->objs, idx);
 671         x = obj->data.crl;
 672         if (!X509_CRL_up_ref(x)) {
 673             X509_STORE_unlock(store);
 674             sk_X509_CRL_pop_free(sk, X509_CRL_free);
 675             return NULL;
 676         }
 677         if (!sk_X509_CRL_push(sk, x)) {
 678             X509_STORE_unlock(store);
 679             X509_CRL_free(x);
 680             sk_X509_CRL_pop_free(sk, X509_CRL_free);
 681             return NULL;
 682         }
 683     }
 684     X509_STORE_unlock(store);
 685     return sk;
 686 }
 687
 688 X509_OBJECT *X509_OBJECT_retrieve_match(STACK_OF(X509_OBJECT) *h,
 689                                         X509_OBJECT *x)
 690 {
 691     int idx, i, num;
 692     X509_OBJECT *obj;
 693
 694     idx = sk_X509_OBJECT_find(h, x);
 695     if (idx < 0)
 696         return NULL;
 697     if ((x->type != X509_LU_X509) && (x->type != X509_LU_CRL))
 698         return sk_X509_OBJECT_value(h, idx);
 699     for (i = idx, num = sk_X509_OBJECT_num(h); i < num; i++) {
 700         obj = sk_X509_OBJECT_value(h, i);
 701         if (x509_object_cmp((const X509_OBJECT **)&obj,
 702                             (const X509_OBJECT **)&x))
 703             return NULL;
 704         if (x->type == X509_LU_X509) {
 705             if (!X509_cmp(obj->data.x509, x->data.x509))
 706                 return obj;
 707         } else if (x->type == X509_LU_CRL) {
 708             if (X509_CRL_match(obj->data.crl, x->data.crl) == 0)
 709                 return obj;
 710         } else
 711             return obj;
 712     }
 713     return NULL;
 714 }
 715
 716 /*-
 717  * Try to get issuer cert from |ctx->store| matching the subject name of |x|.
 718  * Prefer the first non-expired one, else take the most recently expired one.
 719  *
 720  * Return values are:
 721  *  1 lookup successful.
 722  *  0 certificate not found.
 723  * -1 some other error.
 724  */
 725 int X509_STORE_CTX_get1_issuer(X509 **issuer, X509_STORE_CTX *ctx, X509 *x)
 726 {
 727     const X509_NAME *xn;
 728     X509_OBJECT *obj = X509_OBJECT_new(), *pobj = NULL;
 729     X509_STORE *store = ctx->store;
 730     int i, ok, idx, ret, nmatch = 0;
 731
 732     if (obj == NULL)
 733         return -1;
 734     *issuer = NULL;
 735     xn = X509_get_issuer_name(x);
 736     ok = X509_STORE_CTX_get_by_subject(ctx, X509_LU_X509, xn, obj);
 737     if (ok != 1) {
 738         X509_OBJECT_free(obj);
 739         return 0;
 740     }
 741     /* If certificate matches and is currently valid all OK */
 742     if (ctx->check_issued(ctx, x, obj->data.x509)) {
 743         if (ossl_x509_check_cert_time(ctx, obj->data.x509, -1)) {
 744             *issuer = obj->data.x509;
 745             /* |*issuer| has taken over the cert reference from |obj| */
 746             obj->type = X509_LU_NONE;
 747             X509_OBJECT_free(obj);
 748             return 1;
 749         }
 750     }
 751     X509_OBJECT_free(obj);
 752
 753     /*
 754      * Due to limitations of the API this can only retrieve a single cert.
 755      * However it will fill the cache with all matching certificates,
 756      * so we can examine the cache for all matches.
 757      */
 758     if (store == NULL)
 759         return 0;
 760
 761     /* Find index of first currently valid cert accepted by 'check_issued' */
 762     ret = 0;
 763     if (!X509_STORE_lock(store))
 764         return 0;
 765
 766     idx = x509_object_idx_cnt(store->objs, X509_LU_X509, xn, &nmatch);
 767     if (idx != -1) { /* should be true as we've had at least one match */
 768         /* Look through all matching certs for suitable issuer */
 769         for (i = idx; i < idx + nmatch; i++) {
 770             pobj = sk_X509_OBJECT_value(store->objs, i);
 771             /* See if we've run past the matches */
 772             if (pobj->type != X509_LU_X509)
 773                 break;
 774             if (ctx->check_issued(ctx, x, pobj->data.x509)) {
 775                 ret = 1;
 776                 /* If times check fine, exit with match, else keep looking. */
 777                 if (ossl_x509_check_cert_time(ctx, pobj->data.x509, -1)) {
 778                     *issuer = pobj->data.x509;
 779                     break;
 780                 }
 781                 /*
 782                  * Leave the so far most recently expired match in *issuer
 783                  * so we return nearest match if no certificate time is OK.
 784                  */
 785                 if (*issuer == NULL
 786                     || ASN1_TIME_compare(X509_get0_notAfter(pobj->data.x509),
 787                                          X509_get0_notAfter(*issuer)) > 0)
 788                     *issuer = pobj->data.x509;
 789             }
 790         }
 791     }
 792     if (*issuer != NULL && !X509_up_ref(*issuer)) {
 793         *issuer = NULL;
 794         ret = -1;
 795     }
 796     X509_STORE_unlock(store);
 797     return ret;
 798 }
 799
 800 int X509_STORE_set_flags(X509_STORE *ctx, unsigned long flags)
 801 {
 802     return X509_VERIFY_PARAM_set_flags(ctx->param, flags);
 803 }
 804
 805 int X509_STORE_set_depth(X509_STORE *ctx, int depth)
 806 {
 807     X509_VERIFY_PARAM_set_depth(ctx->param, depth);
 808     return 1;
 809 }
 810
 811 int X509_STORE_set_purpose(X509_STORE *ctx, int purpose)
 812 {
 813     return X509_VERIFY_PARAM_set_purpose(ctx->param, purpose);
 814 }
 815
 816 int X509_STORE_set_trust(X509_STORE *ctx, int trust)
 817 {
 818     return X509_VERIFY_PARAM_set_trust(ctx->param, trust);
 819 }
 820
 821 int X509_STORE_set1_param(X509_STORE *ctx, const X509_VERIFY_PARAM *param)
 822 {
 823     return X509_VERIFY_PARAM_set1(ctx->param, param);
 824 }
 825
 826 X509_VERIFY_PARAM *X509_STORE_get0_param(const X509_STORE *ctx)
 827 {
 828     return ctx->param;
 829 }
 830
 831 void X509_STORE_set_verify(X509_STORE *ctx, X509_STORE_CTX_verify_fn verify)
 832 {
 833     ctx->verify = verify;
 834 }
 835
 836 X509_STORE_CTX_verify_fn X509_STORE_get_verify(const X509_STORE *ctx)
 837 {
 838     return ctx->verify;
 839 }
 840
 841 void X509_STORE_set_verify_cb(X509_STORE *ctx,
 842                               X509_STORE_CTX_verify_cb verify_cb)
 843 {
 844     ctx->verify_cb = verify_cb;
 845 }
 846
 847 X509_STORE_CTX_verify_cb X509_STORE_get_verify_cb(const X509_STORE *ctx)
 848 {
 849     return ctx->verify_cb;
 850 }
 851
 852 void X509_STORE_set_get_issuer(X509_STORE *ctx,
 853                                X509_STORE_CTX_get_issuer_fn get_issuer)
 854 {
 855     ctx->get_issuer = get_issuer;
 856 }
 857
 858 X509_STORE_CTX_get_issuer_fn X509_STORE_get_get_issuer(const X509_STORE *ctx)
 859 {
 860     return ctx->get_issuer;
 861 }
 862
 863 void X509_STORE_set_check_issued(X509_STORE *ctx,
 864                                  X509_STORE_CTX_check_issued_fn check_issued)
 865 {
 866     ctx->check_issued = check_issued;
 867 }
 868
 869 X509_STORE_CTX_check_issued_fn X509_STORE_get_check_issued(const X509_STORE *ctx)
 870 {
 871     return ctx->check_issued;
 872 }
 873
 874 void X509_STORE_set_check_revocation(X509_STORE *ctx,
 875                                      X509_STORE_CTX_check_revocation_fn check_revocation)
 876 {
 877     ctx->check_revocation = check_revocation;
 878 }
 879
 880 X509_STORE_CTX_check_revocation_fn X509_STORE_get_check_revocation(const X509_STORE *ctx)
 881 {
 882     return ctx->check_revocation;
 883 }
 884
 885 void X509_STORE_set_get_crl(X509_STORE *ctx,
 886                             X509_STORE_CTX_get_crl_fn get_crl)
 887 {
 888     ctx->get_crl = get_crl;
 889 }
 890
 891 X509_STORE_CTX_get_crl_fn X509_STORE_get_get_crl(const X509_STORE *ctx)
 892 {
 893     return ctx->get_crl;
 894 }
 895
 896 void X509_STORE_set_check_crl(X509_STORE *ctx,
 897                               X509_STORE_CTX_check_crl_fn check_crl)
 898 {
 899     ctx->check_crl = check_crl;
 900 }
 901
 902 X509_STORE_CTX_check_crl_fn X509_STORE_get_check_crl(const X509_STORE *ctx)
 903 {
 904     return ctx->check_crl;
 905 }
 906
 907 void X509_STORE_set_cert_crl(X509_STORE *ctx,
 908                              X509_STORE_CTX_cert_crl_fn cert_crl)
 909 {
 910     ctx->cert_crl = cert_crl;
 911 }
 912
 913 X509_STORE_CTX_cert_crl_fn X509_STORE_get_cert_crl(const X509_STORE *ctx)
 914 {
 915     return ctx->cert_crl;
 916 }
 917
 918 void X509_STORE_set_check_policy(X509_STORE *ctx,
 919                                  X509_STORE_CTX_check_policy_fn check_policy)
 920 {
 921     ctx->check_policy = check_policy;
 922 }
 923
 924 X509_STORE_CTX_check_policy_fn X509_STORE_get_check_policy(const X509_STORE *ctx)
 925 {
 926     return ctx->check_policy;
 927 }
 928
 929 void X509_STORE_set_lookup_certs(X509_STORE *ctx,
 930                                  X509_STORE_CTX_lookup_certs_fn lookup_certs)
 931 {
 932     ctx->lookup_certs = lookup_certs;
 933 }
 934
 935 X509_STORE_CTX_lookup_certs_fn X509_STORE_get_lookup_certs(const X509_STORE *ctx)
 936 {
 937     return ctx->lookup_certs;
 938 }
 939
 940 void X509_STORE_set_lookup_crls(X509_STORE *ctx,
 941                                 X509_STORE_CTX_lookup_crls_fn lookup_crls)
 942 {
 943     ctx->lookup_crls = lookup_crls;
 944 }
 945
 946 X509_STORE_CTX_lookup_crls_fn X509_STORE_get_lookup_crls(const X509_STORE *ctx)
 947 {
 948     return ctx->lookup_crls;
 949 }
 950
 951 void X509_STORE_set_cleanup(X509_STORE *ctx,
 952                             X509_STORE_CTX_cleanup_fn ctx_cleanup)
 953 {
 954     ctx->cleanup = ctx_cleanup;
 955 }
 956
 957 X509_STORE_CTX_cleanup_fn X509_STORE_get_cleanup(const X509_STORE *ctx)
 958 {
 959     return ctx->cleanup;
 960 }
 961
 962 int X509_STORE_set_ex_data(X509_STORE *ctx, int idx, void *data)
 963 {
 964     return CRYPTO_set_ex_data(&ctx->ex_data, idx, data);
 965 }
 966
 967 void *X509_STORE_get_ex_data(const X509_STORE *ctx, int idx)
 968 {
 969     return CRYPTO_get_ex_data(&ctx->ex_data, idx);
 970 }
 971
 972 X509_STORE *X509_STORE_CTX_get0_store(const X509_STORE_CTX *ctx)
 973 {
 974     return ctx->store;
 975 }