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 int X509_LOOKUP_set_method_data(X509_LOOKUP *ctx, void *data)
 122 {
 123     ctx->method_data = data;
 124     return 1;
 125 }
 126
 127 void *X509_LOOKUP_get_method_data(const X509_LOOKUP *ctx)
 128 {
 129     return ctx->method_data;
 130 }
 131
 132 X509_STORE *X509_LOOKUP_get_store(const X509_LOOKUP *ctx)
 133 {
 134     return ctx->store_ctx;
 135 }
 136
 137
 138 static int x509_object_cmp(const X509_OBJECT *const *a,
 139                            const X509_OBJECT *const *b)
 140 {
 141     int ret;
 142
 143     ret = ((*a)->type - (*b)->type);
 144     if (ret)
 145         return ret;
 146     switch ((*a)->type) {
 147     case X509_LU_X509:
 148         ret = X509_subject_name_cmp((*a)->data.x509, (*b)->data.x509);
 149         break;
 150     case X509_LU_CRL:
 151         ret = X509_CRL_cmp((*a)->data.crl, (*b)->data.crl);
 152         break;
 153     case X509_LU_NONE:
 154         /* abort(); */
 155         return 0;
 156     }
 157     return ret;
 158 }
 159
 160 X509_STORE *X509_STORE_new(void)
 161 {
 162     X509_STORE *ret = OPENSSL_zalloc(sizeof(*ret));
 163
 164     if (ret == NULL) {
 165         X509err(X509_F_X509_STORE_NEW, ERR_R_MALLOC_FAILURE);
 166         return NULL;
 167     }
 168     if ((ret->objs = sk_X509_OBJECT_new(x509_object_cmp)) == NULL) {
 169         X509err(X509_F_X509_STORE_NEW, ERR_R_MALLOC_FAILURE);
 170         goto err;
 171     }
 172     ret->cache = 1;
 173     if ((ret->get_cert_methods = sk_X509_LOOKUP_new_null()) == NULL) {
 174         X509err(X509_F_X509_STORE_NEW, ERR_R_MALLOC_FAILURE);
 175         goto err;
 176     }
 177
 178     if ((ret->param = X509_VERIFY_PARAM_new()) == NULL) {
 179         X509err(X509_F_X509_STORE_NEW, ERR_R_MALLOC_FAILURE);
 180         goto err;
 181     }
 182     if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509_STORE, ret, &ret->ex_data)) {
 183         X509err(X509_F_X509_STORE_NEW, ERR_R_MALLOC_FAILURE);
 184         goto err;
 185     }
 186
 187     ret->lock = CRYPTO_THREAD_lock_new();
 188     if (ret->lock == NULL) {
 189         X509err(X509_F_X509_STORE_NEW, ERR_R_MALLOC_FAILURE);
 190         goto err;
 191     }
 192
 193     ret->references = 1;
 194     return ret;
 195
 196 err:
 197     X509_VERIFY_PARAM_free(ret->param);
 198     sk_X509_OBJECT_free(ret->objs);
 199     sk_X509_LOOKUP_free(ret->get_cert_methods);
 200     OPENSSL_free(ret);
 201     return NULL;
 202 }
 203
 204 void X509_STORE_free(X509_STORE *vfy)
 205 {
 206     int i;
 207     STACK_OF(X509_LOOKUP) *sk;
 208     X509_LOOKUP *lu;
 209
 210     if (vfy == NULL)
 211         return;
 212     CRYPTO_DOWN_REF(&vfy->references, &i, vfy->lock);
 213     REF_PRINT_COUNT("X509_STORE", vfy);
 214     if (i > 0)
 215         return;
 216     REF_ASSERT_ISNT(i < 0);
 217
 218     sk = vfy->get_cert_methods;
 219     for (i = 0; i < sk_X509_LOOKUP_num(sk); i++) {
 220         lu = sk_X509_LOOKUP_value(sk, i);
 221         X509_LOOKUP_shutdown(lu);
 222         X509_LOOKUP_free(lu);
 223     }
 224     sk_X509_LOOKUP_free(sk);
 225     sk_X509_OBJECT_pop_free(vfy->objs, X509_OBJECT_free);
 226
 227     CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509_STORE, vfy, &vfy->ex_data);
 228     X509_VERIFY_PARAM_free(vfy->param);
 229     CRYPTO_THREAD_lock_free(vfy->lock);
 230     OPENSSL_free(vfy);
 231 }
 232
 233 int X509_STORE_up_ref(X509_STORE *vfy)
 234 {
 235     int i;
 236
 237     if (CRYPTO_UP_REF(&vfy->references, &i, vfy->lock) <= 0)
 238         return 0;
 239
 240     REF_PRINT_COUNT("X509_STORE", a);
 241     REF_ASSERT_ISNT(i < 2);
 242     return ((i > 1) ? 1 : 0);
 243 }
 244
 245 X509_LOOKUP *X509_STORE_add_lookup(X509_STORE *v, X509_LOOKUP_METHOD *m)
 246 {
 247     int i;
 248     STACK_OF(X509_LOOKUP) *sk;
 249     X509_LOOKUP *lu;
 250
 251     sk = v->get_cert_methods;
 252     for (i = 0; i < sk_X509_LOOKUP_num(sk); i++) {
 253         lu = sk_X509_LOOKUP_value(sk, i);
 254         if (m == lu->method) {
 255             return lu;
 256         }
 257     }
 258     /* a new one */
 259     lu = X509_LOOKUP_new(m);
 260     if (lu == NULL) {
 261         X509err(X509_F_X509_STORE_ADD_LOOKUP, ERR_R_MALLOC_FAILURE);
 262         return NULL;
 263     }
 264
 265     lu->store_ctx = v;
 266     if (sk_X509_LOOKUP_push(v->get_cert_methods, lu))
 267         return lu;
 268     /* malloc failed */
 269     X509err(X509_F_X509_STORE_ADD_LOOKUP, ERR_R_MALLOC_FAILURE);
 270     X509_LOOKUP_free(lu);
 271     return NULL;
 272 }
 273
 274 X509_OBJECT *X509_STORE_CTX_get_obj_by_subject(X509_STORE_CTX *vs,
 275                                                X509_LOOKUP_TYPE type,
 276                                                X509_NAME *name)
 277 {
 278     X509_OBJECT *ret = X509_OBJECT_new();
 279
 280     if (ret == NULL)
 281         return NULL;
 282     if (!X509_STORE_CTX_get_by_subject(vs, type, name, ret)) {
 283         X509_OBJECT_free(ret);
 284         return NULL;
 285     }
 286     return ret;
 287 }
 288
 289 int X509_STORE_CTX_get_by_subject(X509_STORE_CTX *vs, X509_LOOKUP_TYPE type,
 290                                   X509_NAME *name, 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     if (ctx == NULL)
 298         return 0;
 299
 300     CRYPTO_THREAD_write_lock(ctx->lock);
 301     tmp = X509_OBJECT_retrieve_by_subject(ctx->objs, type, name);
 302     CRYPTO_THREAD_unlock(ctx->lock);
 303
 304     if (tmp == NULL || type == X509_LU_CRL) {
 305         for (i = 0; i < sk_X509_LOOKUP_num(ctx->get_cert_methods); i++) {
 306             lu = sk_X509_LOOKUP_value(ctx->get_cert_methods, i);
 307             j = X509_LOOKUP_by_subject(lu, type, name, &stmp);
 308             if (j) {
 309                 tmp = &stmp;
 310                 break;
 311             }
 312         }
 313         if (tmp == NULL)
 314             return 0;
 315     }
 316
 317     ret->type = tmp->type;
 318     ret->data.ptr = tmp->data.ptr;
 319
 320     X509_OBJECT_up_ref_count(ret);
 321
 322     return 1;
 323 }
 324
 325 static int x509_store_add(X509_STORE *ctx, void *x, int crl) {
 326     X509_OBJECT *obj;
 327     int ret = 0, added = 0;
 328
 329     if (x == NULL)
 330         return 0;
 331     obj = X509_OBJECT_new();
 332     if (obj == NULL)
 333         return 0;
 334
 335     if (crl) {
 336         obj->type = X509_LU_CRL;
 337         obj->data.crl = (X509_CRL *)x;
 338     } else {
 339         obj->type = X509_LU_X509;
 340         obj->data.x509 = (X509 *)x;
 341     }
 342     X509_OBJECT_up_ref_count(obj);
 343
 344     CRYPTO_THREAD_write_lock(ctx->lock);
 345
 346     if (X509_OBJECT_retrieve_match(ctx->objs, obj)) {
 347         ret = 1;
 348     } else {
 349         added = sk_X509_OBJECT_push(ctx->objs, obj);
 350         ret = added != 0;
 351     }
 352
 353     CRYPTO_THREAD_unlock(ctx->lock);
 354
 355     if (added == 0)             /* obj not pushed */
 356         X509_OBJECT_free(obj);
 357
 358     return ret;
 359 }
 360
 361 int X509_STORE_add_cert(X509_STORE *ctx, X509 *x)
 362 {
 363     if (!x509_store_add(ctx, x, 0)) {
 364         X509err(X509_F_X509_STORE_ADD_CERT, ERR_R_MALLOC_FAILURE);
 365         return 0;
 366     }
 367     return 1;
 368 }
 369
 370 int X509_STORE_add_crl(X509_STORE *ctx, X509_CRL *x)
 371 {
 372     if (!x509_store_add(ctx, x, 1)) {
 373         X509err(X509_F_X509_STORE_ADD_CRL, ERR_R_MALLOC_FAILURE);
 374         return 0;
 375     }
 376     return 1;
 377 }
 378
 379 int X509_OBJECT_up_ref_count(X509_OBJECT *a)
 380 {
 381     switch (a->type) {
 382     case X509_LU_NONE:
 383         break;
 384     case X509_LU_X509:
 385         return X509_up_ref(a->data.x509);
 386     case X509_LU_CRL:
 387         return X509_CRL_up_ref(a->data.crl);
 388     }
 389     return 1;
 390 }
 391
 392 X509 *X509_OBJECT_get0_X509(const X509_OBJECT *a)
 393 {
 394     if (a == NULL || a->type != X509_LU_X509)
 395         return NULL;
 396     return a->data.x509;
 397 }
 398
 399 X509_CRL *X509_OBJECT_get0_X509_CRL(X509_OBJECT *a)
 400 {
 401     if (a == NULL || a->type != X509_LU_CRL)
 402         return NULL;
 403     return a->data.crl;
 404 }
 405
 406 X509_LOOKUP_TYPE X509_OBJECT_get_type(const X509_OBJECT *a)
 407 {
 408     return a->type;
 409 }
 410
 411 X509_OBJECT *X509_OBJECT_new(void)
 412 {
 413     X509_OBJECT *ret = OPENSSL_zalloc(sizeof(*ret));
 414
 415     if (ret == NULL) {
 416         X509err(X509_F_X509_OBJECT_NEW, ERR_R_MALLOC_FAILURE);
 417         return NULL;
 418     }
 419     ret->type = X509_LU_NONE;
 420     return ret;
 421 }
 422
 423 static void x509_object_free_internal(X509_OBJECT *a)
 424 {
 425     if (a == NULL)
 426         return;
 427     switch (a->type) {
 428     case X509_LU_NONE:
 429         break;
 430     case X509_LU_X509:
 431         X509_free(a->data.x509);
 432         break;
 433     case X509_LU_CRL:
 434         X509_CRL_free(a->data.crl);
 435         break;
 436     }
 437 }
 438
 439 int X509_OBJECT_set1_X509(X509_OBJECT *a, X509 *obj)
 440 {
 441     if (a == NULL || !X509_up_ref(obj))
 442         return 0;
 443
 444     x509_object_free_internal(a);
 445     a->type = X509_LU_X509;
 446     a->data.x509 = obj;
 447     return 1;
 448 }
 449
 450 int X509_OBJECT_set1_X509_CRL(X509_OBJECT *a, X509_CRL *obj)
 451 {
 452     if (a == NULL || !X509_CRL_up_ref(obj))
 453         return 0;
 454
 455     x509_object_free_internal(a);
 456     a->type = X509_LU_CRL;
 457     a->data.crl = obj;
 458     return 1;
 459 }
 460
 461 void X509_OBJECT_free(X509_OBJECT *a)
 462 {
 463     x509_object_free_internal(a);
 464     OPENSSL_free(a);
 465 }
 466
 467 static int x509_object_idx_cnt(STACK_OF(X509_OBJECT) *h, X509_LOOKUP_TYPE type,
 468                                X509_NAME *name, int *pnmatch)
 469 {
 470     X509_OBJECT stmp;
 471     X509 x509_s;
 472     X509_CRL crl_s;
 473     int idx;
 474
 475     stmp.type = type;
 476     switch (type) {
 477     case X509_LU_X509:
 478         stmp.data.x509 = &x509_s;
 479         x509_s.cert_info.subject = name;
 480         break;
 481     case X509_LU_CRL:
 482         stmp.data.crl = &crl_s;
 483         crl_s.crl.issuer = name;
 484         break;
 485     case X509_LU_NONE:
 486         /* abort(); */
 487         return -1;
 488     }
 489
 490     idx = sk_X509_OBJECT_find(h, &stmp);
 491     if (idx >= 0 && pnmatch) {
 492         int tidx;
 493         const X509_OBJECT *tobj, *pstmp;
 494         *pnmatch = 1;
 495         pstmp = &stmp;
 496         for (tidx = idx + 1; tidx < sk_X509_OBJECT_num(h); tidx++) {
 497             tobj = sk_X509_OBJECT_value(h, tidx);
 498             if (x509_object_cmp(&tobj, &pstmp))
 499                 break;
 500             (*pnmatch)++;
 501         }
 502     }
 503     return idx;
 504 }
 505
 506 int X509_OBJECT_idx_by_subject(STACK_OF(X509_OBJECT) *h, X509_LOOKUP_TYPE type,
 507                                X509_NAME *name)
 508 {
 509     return x509_object_idx_cnt(h, type, name, NULL);
 510 }
 511
 512 X509_OBJECT *X509_OBJECT_retrieve_by_subject(STACK_OF(X509_OBJECT) *h,
 513                                              X509_LOOKUP_TYPE type,
 514                                              X509_NAME *name)
 515 {
 516     int idx;
 517     idx = X509_OBJECT_idx_by_subject(h, type, name);
 518     if (idx == -1)
 519         return NULL;
 520     return sk_X509_OBJECT_value(h, idx);
 521 }
 522
 523 STACK_OF(X509_OBJECT) *X509_STORE_get0_objects(X509_STORE *v)
 524 {
 525     return v->objs;
 526 }
 527
 528 STACK_OF(X509) *X509_STORE_CTX_get1_certs(X509_STORE_CTX *ctx, X509_NAME *nm)
 529 {
 530     int i, idx, cnt;
 531     STACK_OF(X509) *sk = NULL;
 532     X509 *x;
 533     X509_OBJECT *obj;
 534
 535     if (ctx->ctx == NULL)
 536         return NULL;
 537
 538     CRYPTO_THREAD_write_lock(ctx->ctx->lock);
 539     idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_X509, nm, &cnt);
 540     if (idx < 0) {
 541         /*
 542          * Nothing found in cache: do lookup to possibly add new objects to
 543          * cache
 544          */
 545         X509_OBJECT *xobj = X509_OBJECT_new();
 546
 547         CRYPTO_THREAD_unlock(ctx->ctx->lock);
 548         if (xobj == NULL)
 549             return NULL;
 550         if (!X509_STORE_CTX_get_by_subject(ctx, X509_LU_X509, nm, xobj)) {
 551             X509_OBJECT_free(xobj);
 552             return NULL;
 553         }
 554         X509_OBJECT_free(xobj);
 555         CRYPTO_THREAD_write_lock(ctx->ctx->lock);
 556         idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_X509, nm, &cnt);
 557         if (idx < 0) {
 558             CRYPTO_THREAD_unlock(ctx->ctx->lock);
 559             return NULL;
 560         }
 561     }
 562
 563     sk = sk_X509_new_null();
 564     for (i = 0; i < cnt; i++, idx++) {
 565         obj = sk_X509_OBJECT_value(ctx->ctx->objs, idx);
 566         x = obj->data.x509;
 567         X509_up_ref(x);
 568         if (!sk_X509_push(sk, x)) {
 569             CRYPTO_THREAD_unlock(ctx->ctx->lock);
 570             X509_free(x);
 571             sk_X509_pop_free(sk, X509_free);
 572             return NULL;
 573         }
 574     }
 575     CRYPTO_THREAD_unlock(ctx->ctx->lock);
 576     return sk;
 577 }
 578
 579 STACK_OF(X509_CRL) *X509_STORE_CTX_get1_crls(X509_STORE_CTX *ctx, X509_NAME *nm)
 580 {
 581     int i, idx, cnt;
 582     STACK_OF(X509_CRL) *sk = sk_X509_CRL_new_null();
 583     X509_CRL *x;
 584     X509_OBJECT *obj, *xobj = X509_OBJECT_new();
 585
 586     /* Always do lookup to possibly add new CRLs to cache */
 587     if (sk == NULL
 588             || xobj == NULL
 589             || ctx->ctx == NULL
 590             || !X509_STORE_CTX_get_by_subject(ctx, X509_LU_CRL, nm, xobj)) {
 591         X509_OBJECT_free(xobj);
 592         sk_X509_CRL_free(sk);
 593         return NULL;
 594     }
 595     X509_OBJECT_free(xobj);
 596     CRYPTO_THREAD_write_lock(ctx->ctx->lock);
 597     idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_CRL, nm, &cnt);
 598     if (idx < 0) {
 599         CRYPTO_THREAD_unlock(ctx->ctx->lock);
 600         sk_X509_CRL_free(sk);
 601         return NULL;
 602     }
 603
 604     for (i = 0; i < cnt; i++, idx++) {
 605         obj = sk_X509_OBJECT_value(ctx->ctx->objs, idx);
 606         x = obj->data.crl;
 607         X509_CRL_up_ref(x);
 608         if (!sk_X509_CRL_push(sk, x)) {
 609             CRYPTO_THREAD_unlock(ctx->ctx->lock);
 610             X509_CRL_free(x);
 611             sk_X509_CRL_pop_free(sk, X509_CRL_free);
 612             return NULL;
 613         }
 614     }
 615     CRYPTO_THREAD_unlock(ctx->ctx->lock);
 616     return sk;
 617 }
 618
 619 X509_OBJECT *X509_OBJECT_retrieve_match(STACK_OF(X509_OBJECT) *h,
 620                                         X509_OBJECT *x)
 621 {
 622     int idx, i;
 623     X509_OBJECT *obj;
 624     idx = sk_X509_OBJECT_find(h, x);
 625     if (idx == -1)
 626         return NULL;
 627     if ((x->type != X509_LU_X509) && (x->type != X509_LU_CRL))
 628         return sk_X509_OBJECT_value(h, idx);
 629     for (i = idx; i < sk_X509_OBJECT_num(h); i++) {
 630         obj = sk_X509_OBJECT_value(h, i);
 631         if (x509_object_cmp
 632             ((const X509_OBJECT **)&obj, (const X509_OBJECT **)&x))
 633             return NULL;
 634         if (x->type == X509_LU_X509) {
 635             if (!X509_cmp(obj->data.x509, x->data.x509))
 636                 return obj;
 637         } else if (x->type == X509_LU_CRL) {
 638             if (!X509_CRL_match(obj->data.crl, x->data.crl))
 639                 return obj;
 640         } else
 641             return obj;
 642     }
 643     return NULL;
 644 }
 645
 646 /*-
 647  * Try to get issuer certificate from store. Due to limitations
 648  * of the API this can only retrieve a single certificate matching
 649  * a given subject name. However it will fill the cache with all
 650  * matching certificates, so we can examine the cache for all
 651  * matches.
 652  *
 653  * Return values are:
 654  *  1 lookup successful.
 655  *  0 certificate not found.
 656  * -1 some other error.
 657  */
 658 int X509_STORE_CTX_get1_issuer(X509 **issuer, X509_STORE_CTX *ctx, X509 *x)
 659 {
 660     X509_NAME *xn;
 661     X509_OBJECT *obj = X509_OBJECT_new(), *pobj = NULL;
 662     int i, ok, idx, ret;
 663
 664     if (obj == NULL)
 665         return -1;
 666     *issuer = NULL;
 667     xn = X509_get_issuer_name(x);
 668     ok = X509_STORE_CTX_get_by_subject(ctx, X509_LU_X509, xn, obj);
 669     if (ok != 1) {
 670         X509_OBJECT_free(obj);
 671         return 0;
 672     }
 673     /* If certificate matches all OK */
 674     if (ctx->check_issued(ctx, x, obj->data.x509)) {
 675         if (x509_check_cert_time(ctx, obj->data.x509, -1)) {
 676             *issuer = obj->data.x509;
 677             X509_up_ref(*issuer);
 678             X509_OBJECT_free(obj);
 679             return 1;
 680         }
 681     }
 682     X509_OBJECT_free(obj);
 683
 684     if (ctx->ctx == NULL)
 685         return 0;
 686
 687     /* Else find index of first cert accepted by 'check_issued' */
 688     ret = 0;
 689     CRYPTO_THREAD_write_lock(ctx->ctx->lock);
 690     idx = X509_OBJECT_idx_by_subject(ctx->ctx->objs, X509_LU_X509, xn);
 691     if (idx != -1) {            /* should be true as we've had at least one
 692                                  * match */
 693         /* Look through all matching certs for suitable issuer */
 694         for (i = idx; i < sk_X509_OBJECT_num(ctx->ctx->objs); i++) {
 695             pobj = sk_X509_OBJECT_value(ctx->ctx->objs, i);
 696             /* See if we've run past the matches */
 697             if (pobj->type != X509_LU_X509)
 698                 break;
 699             if (X509_NAME_cmp(xn, X509_get_subject_name(pobj->data.x509)))
 700                 break;
 701             if (ctx->check_issued(ctx, x, pobj->data.x509)) {
 702                 *issuer = pobj->data.x509;
 703                 ret = 1;
 704                 /*
 705                  * If times check, exit with match,
 706                  * otherwise keep looking. Leave last
 707                  * match in issuer so we return nearest
 708                  * match if no certificate time is OK.
 709                  */
 710
 711                 if (x509_check_cert_time(ctx, *issuer, -1))
 712                     break;
 713             }
 714         }
 715     }
 716     CRYPTO_THREAD_unlock(ctx->ctx->lock);
 717     if (*issuer)
 718         X509_up_ref(*issuer);
 719     return ret;
 720 }
 721
 722 int X509_STORE_set_flags(X509_STORE *ctx, unsigned long flags)
 723 {
 724     return X509_VERIFY_PARAM_set_flags(ctx->param, flags);
 725 }
 726
 727 int X509_STORE_set_depth(X509_STORE *ctx, int depth)
 728 {
 729     X509_VERIFY_PARAM_set_depth(ctx->param, depth);
 730     return 1;
 731 }
 732
 733 int X509_STORE_set_purpose(X509_STORE *ctx, int purpose)
 734 {
 735     return X509_VERIFY_PARAM_set_purpose(ctx->param, purpose);
 736 }
 737
 738 int X509_STORE_set_trust(X509_STORE *ctx, int trust)
 739 {
 740     return X509_VERIFY_PARAM_set_trust(ctx->param, trust);
 741 }
 742
 743 int X509_STORE_set1_param(X509_STORE *ctx, X509_VERIFY_PARAM *param)
 744 {
 745     return X509_VERIFY_PARAM_set1(ctx->param, param);
 746 }
 747
 748 X509_VERIFY_PARAM *X509_STORE_get0_param(X509_STORE *ctx)
 749 {
 750     return ctx->param;
 751 }
 752
 753 void X509_STORE_set_verify(X509_STORE *ctx, X509_STORE_CTX_verify_fn verify)
 754 {
 755     ctx->verify = verify;
 756 }
 757
 758 X509_STORE_CTX_verify_fn X509_STORE_get_verify(X509_STORE *ctx)
 759 {
 760     return ctx->verify;
 761 }
 762
 763 void X509_STORE_set_verify_cb(X509_STORE *ctx,
 764                               X509_STORE_CTX_verify_cb verify_cb)
 765 {
 766     ctx->verify_cb = verify_cb;
 767 }
 768
 769 X509_STORE_CTX_verify_cb X509_STORE_get_verify_cb(X509_STORE *ctx)
 770 {
 771     return ctx->verify_cb;
 772 }
 773
 774 void X509_STORE_set_get_issuer(X509_STORE *ctx,
 775                                X509_STORE_CTX_get_issuer_fn get_issuer)
 776 {
 777     ctx->get_issuer = get_issuer;
 778 }
 779
 780 X509_STORE_CTX_get_issuer_fn X509_STORE_get_get_issuer(X509_STORE *ctx)
 781 {
 782     return ctx->get_issuer;
 783 }
 784
 785 void X509_STORE_set_check_issued(X509_STORE *ctx,
 786                                  X509_STORE_CTX_check_issued_fn check_issued)
 787 {
 788     ctx->check_issued = check_issued;
 789 }
 790
 791 X509_STORE_CTX_check_issued_fn X509_STORE_get_check_issued(X509_STORE *ctx)
 792 {
 793     return ctx->check_issued;
 794 }
 795
 796 void X509_STORE_set_check_revocation(X509_STORE *ctx,
 797                                      X509_STORE_CTX_check_revocation_fn check_revocation)
 798 {
 799     ctx->check_revocation = check_revocation;
 800 }
 801
 802 X509_STORE_CTX_check_revocation_fn X509_STORE_get_check_revocation(X509_STORE *ctx)
 803 {
 804     return ctx->check_revocation;
 805 }
 806
 807 void X509_STORE_set_get_crl(X509_STORE *ctx,
 808                             X509_STORE_CTX_get_crl_fn get_crl)
 809 {
 810     ctx->get_crl = get_crl;
 811 }
 812
 813 X509_STORE_CTX_get_crl_fn X509_STORE_get_get_crl(X509_STORE *ctx)
 814 {
 815     return ctx->get_crl;
 816 }
 817
 818 void X509_STORE_set_check_crl(X509_STORE *ctx,
 819                               X509_STORE_CTX_check_crl_fn check_crl)
 820 {
 821     ctx->check_crl = check_crl;
 822 }
 823
 824 X509_STORE_CTX_check_crl_fn X509_STORE_get_check_crl(X509_STORE *ctx)
 825 {
 826     return ctx->check_crl;
 827 }
 828
 829 void X509_STORE_set_cert_crl(X509_STORE *ctx,
 830                              X509_STORE_CTX_cert_crl_fn cert_crl)
 831 {
 832     ctx->cert_crl = cert_crl;
 833 }
 834
 835 X509_STORE_CTX_cert_crl_fn X509_STORE_get_cert_crl(X509_STORE *ctx)
 836 {
 837     return ctx->cert_crl;
 838 }
 839
 840 void X509_STORE_set_check_policy(X509_STORE *ctx,
 841                                  X509_STORE_CTX_check_policy_fn check_policy)
 842 {
 843     ctx->check_policy = check_policy;
 844 }
 845
 846 X509_STORE_CTX_check_policy_fn X509_STORE_get_check_policy(X509_STORE *ctx)
 847 {
 848     return ctx->check_policy;
 849 }
 850
 851 void X509_STORE_set_lookup_certs(X509_STORE *ctx,
 852                                  X509_STORE_CTX_lookup_certs_fn lookup_certs)
 853 {
 854     ctx->lookup_certs = lookup_certs;
 855 }
 856
 857 X509_STORE_CTX_lookup_certs_fn X509_STORE_get_lookup_certs(X509_STORE *ctx)
 858 {
 859     return ctx->lookup_certs;
 860 }
 861
 862 void X509_STORE_set_lookup_crls(X509_STORE *ctx,
 863                                 X509_STORE_CTX_lookup_crls_fn lookup_crls)
 864 {
 865     ctx->lookup_crls = lookup_crls;
 866 }
 867
 868 X509_STORE_CTX_lookup_crls_fn X509_STORE_get_lookup_crls(X509_STORE *ctx)
 869 {
 870     return ctx->lookup_crls;
 871 }
 872
 873 void X509_STORE_set_cleanup(X509_STORE *ctx,
 874                             X509_STORE_CTX_cleanup_fn ctx_cleanup)
 875 {
 876     ctx->cleanup = ctx_cleanup;
 877 }
 878
 879 X509_STORE_CTX_cleanup_fn X509_STORE_get_cleanup(X509_STORE *ctx)
 880 {
 881     return ctx->cleanup;
 882 }
 883
 884 int X509_STORE_set_ex_data(X509_STORE *ctx, int idx, void *data)
 885 {
 886     return CRYPTO_set_ex_data(&ctx->ex_data, idx, data);
 887 }
 888
 889 void *X509_STORE_get_ex_data(X509_STORE *ctx, int idx)
 890 {
 891     return CRYPTO_get_ex_data(&ctx->ex_data, idx);
 892 }
 893
 894 X509_STORE *X509_STORE_CTX_get0_store(X509_STORE_CTX *ctx)
 895 {
 896     return ctx->ctx;
 897 }