text: /* crypto/x509/x509_lu.c */
  /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   * All rights reserved.
   *
   * This package is an SSL implementation written
   * by Eric Young (eay@cryptsoft.com).
   * The implementation was written so as to conform with Netscapes SSL.
   *
   * This library is free for commercial and non-commercial use as long as
   * the following conditions are aheared to.  The following conditions
   * apply to all code found in this distribution, be it the RC4, RSA,
   * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
   * included with this distribution is covered by the same copyright terms
   * except that the holder is Tim Hudson (tjh@cryptsoft.com).
   *
   * Copyright remains Eric Young's, and as such any Copyright notices in
   * the code are not to be removed.
   * If this package is used in a product, Eric Young should be given attribution
   * as the author of the parts of the library used.
   * This can be in the form of a textual message at program startup or
   * in documentation (online or textual) provided with the package.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. All advertising materials mentioning features or use of this software
   *    must display the following acknowledgement:
   *    "This product includes cryptographic software written by
   *     Eric Young (eay@cryptsoft.com)"
   *    The word 'cryptographic' can be left out if the rouines from the library
   *    being used are not cryptographic related :-).
   * 4. If you include any Windows specific code (or a derivative thereof) from
   *    the apps directory (application code) you must include an acknowledgement:
   *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
   *
   * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   *
   * The licence and distribution terms for any publically available version or
   * derivative of this code cannot be changed.  i.e. this code cannot simply be
   * copied and put under another distribution licence
   * [including the GNU Public Licence.]
   */
  
  #include <stdio.h>
  #include "cryptlib.h"
  #include <openssl/lhash.h>
  #include <openssl/x509.h>
  #include <openssl/x509v3.h>
  
  X509_LOOKUP *X509_LOOKUP_new(X509_LOOKUP_METHOD *method)
  {
      X509_LOOKUP *ret;
  
      ret = (X509_LOOKUP *)OPENSSL_malloc(sizeof(X509_LOOKUP));
      if (ret == NULL)
          return NULL;
  
      ret->init = 0;
      ret->skip = 0;
      ret->method = method;
      ret->method_data = NULL;
      ret->store_ctx = NULL;
      if ((method->new_item != NULL) && !method->new_item(ret)) {
          OPENSSL_free(ret);
          return NULL;
      }
      return ret;
  }
  
  void X509_LOOKUP_free(X509_LOOKUP *ctx)
  {
      if (ctx == NULL)
          return;
      if ((ctx->method != NULL) && (ctx->method->free != NULL))
          (*ctx->method->free) (ctx);
      OPENSSL_free(ctx);
  }
  
  int X509_LOOKUP_init(X509_LOOKUP *ctx)
  {
      if (ctx->method == NULL)
          return 0;
      if (ctx->method->init != NULL)
          return ctx->method->init(ctx);
      else
          return 1;
  }
  
  int X509_LOOKUP_shutdown(X509_LOOKUP *ctx)
  {
      if (ctx->method == NULL)
          return 0;
      if (ctx->method->shutdown != NULL)
          return ctx->method->shutdown(ctx);
      else
          return 1;
  }
  
  int X509_LOOKUP_ctrl(X509_LOOKUP *ctx, int cmd, const char *argc, long argl,
                       char **ret)
  {
      if (ctx->method == NULL)
          return -1;
      if (ctx->method->ctrl != NULL)
          return ctx->method->ctrl(ctx, cmd, argc, argl, ret);
      else
          return 1;
  }
  
  int X509_LOOKUP_by_subject(X509_LOOKUP *ctx, int type, X509_NAME *name,
                             X509_OBJECT *ret)
  {
      if ((ctx->method == NULL) || (ctx->method->get_by_subject == NULL))
          return X509_LU_FAIL;
      if (ctx->skip)
          return 0;
      return ctx->method->get_by_subject(ctx, type, name, ret);
  }
  
  int X509_LOOKUP_by_issuer_serial(X509_LOOKUP *ctx, int type, X509_NAME *name,
                                   ASN1_INTEGER *serial, X509_OBJECT *ret)
  {
      if ((ctx->method == NULL) || (ctx->method->get_by_issuer_serial == NULL))
          return X509_LU_FAIL;
      return ctx->method->get_by_issuer_serial(ctx, type, name, serial, ret);
  }
  
  int X509_LOOKUP_by_fingerprint(X509_LOOKUP *ctx, int type,
                                 unsigned char *bytes, int len,
                                 X509_OBJECT *ret)
  {
      if ((ctx->method == NULL) || (ctx->method->get_by_fingerprint == NULL))
          return X509_LU_FAIL;
      return ctx->method->get_by_fingerprint(ctx, type, bytes, len, ret);
  }
  
  int X509_LOOKUP_by_alias(X509_LOOKUP *ctx, int type, char *str, int len,
                           X509_OBJECT *ret)
  {
      if ((ctx->method == NULL) || (ctx->method->get_by_alias == NULL))
          return X509_LU_FAIL;
      return ctx->method->get_by_alias(ctx, type, str, len, ret);
  }
  
  static int x509_object_cmp(const X509_OBJECT *const *a,
                             const X509_OBJECT *const *b)
  {
      int ret;
  
      ret = ((*a)->type - (*b)->type);
      if (ret)
          return ret;
      switch ((*a)->type) {
      case X509_LU_X509:
          ret = X509_subject_name_cmp((*a)->data.x509, (*b)->data.x509);
          break;
      case X509_LU_CRL:
          ret = X509_CRL_cmp((*a)->data.crl, (*b)->data.crl);
          break;
      default:
          /* abort(); */
          return 0;
      }
      return ret;
  }
  
  X509_STORE *X509_STORE_new(void)
  {
      X509_STORE *ret;
  
      if ((ret = (X509_STORE *)OPENSSL_malloc(sizeof(X509_STORE))) == NULL)
          return NULL;
      if ((ret->objs = sk_X509_OBJECT_new(x509_object_cmp)) == NULL)
          goto err0;
      ret->cache = 1;
      if ((ret->get_cert_methods = sk_X509_LOOKUP_new_null()) == NULL)
          goto err1;
      ret->verify = 0;
      ret->verify_cb = 0;
  
      if ((ret->param = X509_VERIFY_PARAM_new()) == NULL)
          goto err2;
  
      ret->get_issuer = 0;
      ret->check_issued = 0;
      ret->check_revocation = 0;
      ret->get_crl = 0;
      ret->check_crl = 0;
      ret->cert_crl = 0;
      ret->lookup_certs = 0;
      ret->lookup_crls = 0;
      ret->cleanup = 0;
  
      if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509_STORE, ret, &ret->ex_data))
         goto err3;
  
      ret->references = 1;
      return ret;
  
   err3:
      X509_VERIFY_PARAM_free(ret->param);
   err2:
      sk_X509_LOOKUP_free(ret->get_cert_methods);
   err1:
      sk_X509_OBJECT_free(ret->objs);
   err0:
      OPENSSL_free(ret);
      return NULL;
  }
  
  static void cleanup(X509_OBJECT *a)
  {
      if (!a)
          return;
      if (a->type == X509_LU_X509) {
          X509_free(a->data.x509);
      } else if (a->type == X509_LU_CRL) {
          X509_CRL_free(a->data.crl);
      } else {
          /* abort(); */
      }
  
      OPENSSL_free(a);
  }
  
  void X509_STORE_free(X509_STORE *vfy)
  {
      int i;
      STACK_OF(X509_LOOKUP) *sk;
      X509_LOOKUP *lu;
  
      if (vfy == NULL)
          return;
  
      i = CRYPTO_add(&vfy->references, -1, CRYPTO_LOCK_X509_STORE);
  #ifdef REF_PRINT
      REF_PRINT("X509_STORE", vfy);
  #endif
      if (i > 0)
          return;
  #ifdef REF_CHECK
      if (i < 0) {
          fprintf(stderr, "X509_STORE_free, bad reference count\n");
          abort();                /* ok */
      }
  #endif
  
      sk = vfy->get_cert_methods;
      for (i = 0; i < sk_X509_LOOKUP_num(sk); i++) {
          lu = sk_X509_LOOKUP_value(sk, i);
          X509_LOOKUP_shutdown(lu);
          X509_LOOKUP_free(lu);
      }
      sk_X509_LOOKUP_free(sk);
      sk_X509_OBJECT_pop_free(vfy->objs, cleanup);
  
      CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509_STORE, vfy, &vfy->ex_data);
      if (vfy->param)
          X509_VERIFY_PARAM_free(vfy->param);
      OPENSSL_free(vfy);
  }
  
  X509_LOOKUP *X509_STORE_add_lookup(X509_STORE *v, X509_LOOKUP_METHOD *m)
  {
      int i;
      STACK_OF(X509_LOOKUP) *sk;
      X509_LOOKUP *lu;
  
      sk = v->get_cert_methods;
      for (i = 0; i < sk_X509_LOOKUP_num(sk); i++) {
          lu = sk_X509_LOOKUP_value(sk, i);
          if (m == lu->method) {
              return lu;
          }
      }
      /* a new one */
      lu = X509_LOOKUP_new(m);
      if (lu == NULL)
          return NULL;
      else {
          lu->store_ctx = v;
          if (sk_X509_LOOKUP_push(v->get_cert_methods, lu))
              return lu;
          else {
              X509_LOOKUP_free(lu);
              return NULL;
          }
      }
  }
  
  int X509_STORE_get_by_subject(X509_STORE_CTX *vs, int type, X509_NAME *name,
                                X509_OBJECT *ret)
  {
      X509_STORE *ctx = vs->ctx;
      X509_LOOKUP *lu;
      X509_OBJECT stmp, *tmp;
      int i, j;
  
      CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
      tmp = X509_OBJECT_retrieve_by_subject(ctx->objs, type, name);
      CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
  
      if (tmp == NULL || type == X509_LU_CRL) {
          for (i = vs->current_method;
               i < sk_X509_LOOKUP_num(ctx->get_cert_methods); i++) {
              lu = sk_X509_LOOKUP_value(ctx->get_cert_methods, i);
              j = X509_LOOKUP_by_subject(lu, type, name, &stmp);
              if (j < 0) {
                  vs->current_method = j;
                  return j;
              } else if (j) {
                  tmp = &stmp;
                  break;
              }
          }
          vs->current_method = 0;
          if (tmp == NULL)
              return 0;
      }
  
  /*- if (ret->data.ptr != NULL)
              X509_OBJECT_free_contents(ret); */
  
      ret->type = tmp->type;
      ret->data.ptr = tmp->data.ptr;
  
      X509_OBJECT_up_ref_count(ret);
  
      return 1;
  }
  
  int X509_STORE_add_cert(X509_STORE *ctx, X509 *x)
  {
      X509_OBJECT *obj;
      int ret = 1;
  
      if (x == NULL)
          return 0;
      obj = (X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));
      if (obj == NULL) {
          X509err(X509_F_X509_STORE_ADD_CERT, ERR_R_MALLOC_FAILURE);
          return 0;
      }
      obj->type = X509_LU_X509;
      obj->data.x509 = x;
  
      CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
  
      X509_OBJECT_up_ref_count(obj);
  
      if (X509_OBJECT_retrieve_match(ctx->objs, obj)) {
          X509_OBJECT_free_contents(obj);
          OPENSSL_free(obj);
          X509err(X509_F_X509_STORE_ADD_CERT,
                  X509_R_CERT_ALREADY_IN_HASH_TABLE);
          ret = 0;
      } else if (!sk_X509_OBJECT_push(ctx->objs, obj)) {
          X509_OBJECT_free_contents(obj);
          OPENSSL_free(obj);
          X509err(X509_F_X509_STORE_ADD_CERT, ERR_R_MALLOC_FAILURE);
          ret = 0;
      }
  
      CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
  
      return ret;
  }
  
  int X509_STORE_add_crl(X509_STORE *ctx, X509_CRL *x)
  {
      X509_OBJECT *obj;
      int ret = 1;
  
      if (x == NULL)
          return 0;
      obj = (X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));
      if (obj == NULL) {
          X509err(X509_F_X509_STORE_ADD_CRL, ERR_R_MALLOC_FAILURE);
          return 0;
      }
      obj->type = X509_LU_CRL;
      obj->data.crl = x;
  
      CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
  
      X509_OBJECT_up_ref_count(obj);
  
      if (X509_OBJECT_retrieve_match(ctx->objs, obj)) {
          X509_OBJECT_free_contents(obj);
          OPENSSL_free(obj);
          X509err(X509_F_X509_STORE_ADD_CRL, X509_R_CERT_ALREADY_IN_HASH_TABLE);
          ret = 0;
      } else if (!sk_X509_OBJECT_push(ctx->objs, obj)) {
          X509_OBJECT_free_contents(obj);
          OPENSSL_free(obj);
          X509err(X509_F_X509_STORE_ADD_CRL, ERR_R_MALLOC_FAILURE);
          ret = 0;
      }
  
      CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
  
      return ret;
  }
  
  void X509_OBJECT_up_ref_count(X509_OBJECT *a)
  {
      switch (a->type) {
      case X509_LU_X509:
          CRYPTO_add(&a->data.x509->references, 1, CRYPTO_LOCK_X509);
          break;
      case X509_LU_CRL:
          CRYPTO_add(&a->data.crl->references, 1, CRYPTO_LOCK_X509_CRL);
          break;
      }
  }
  
  void X509_OBJECT_free_contents(X509_OBJECT *a)
  {
      switch (a->type) {
      case X509_LU_X509:
          X509_free(a->data.x509);
          break;
      case X509_LU_CRL:
          X509_CRL_free(a->data.crl);
          break;
      }
  }
  
  static int x509_object_idx_cnt(STACK_OF(X509_OBJECT) *h, int type,
                                 X509_NAME *name, int *pnmatch)
  {
      X509_OBJECT stmp;
      X509 x509_s;
      X509_CINF cinf_s;
      X509_CRL crl_s;
      X509_CRL_INFO crl_info_s;
      int idx;
  
      stmp.type = type;
      switch (type) {
      case X509_LU_X509:
          stmp.data.x509 = &x509_s;
          x509_s.cert_info = &cinf_s;
          cinf_s.subject = name;
          break;
      case X509_LU_CRL:
          stmp.data.crl = &crl_s;
          crl_s.crl = &crl_info_s;
          crl_info_s.issuer = name;
          break;
      default:
          /* abort(); */
          return -1;
      }
  
      idx = sk_X509_OBJECT_find(h, &stmp);
      if (idx >= 0 && pnmatch) {
          int tidx;
          const X509_OBJECT *tobj, *pstmp;
          *pnmatch = 1;
          pstmp = &stmp;
          for (tidx = idx + 1; tidx < sk_X509_OBJECT_num(h); tidx++) {
              tobj = sk_X509_OBJECT_value(h, tidx);
              if (x509_object_cmp(&tobj, &pstmp))
                  break;
              (*pnmatch)++;
          }
      }
      return idx;
  }
  
  int X509_OBJECT_idx_by_subject(STACK_OF(X509_OBJECT) *h, int type,
                                 X509_NAME *name)
  {
      return x509_object_idx_cnt(h, type, name, NULL);
  }
  
  X509_OBJECT *X509_OBJECT_retrieve_by_subject(STACK_OF(X509_OBJECT) *h,
                                               int type, X509_NAME *name)
  {
      int idx;
      idx = X509_OBJECT_idx_by_subject(h, type, name);
      if (idx == -1)
          return NULL;
      return sk_X509_OBJECT_value(h, idx);
  }
  
  STACK_OF(X509) *X509_STORE_get1_certs(X509_STORE_CTX *ctx, X509_NAME *nm)
  {
      int i, idx, cnt;
      STACK_OF(X509) *sk;
      X509 *x;
      X509_OBJECT *obj;
      sk = sk_X509_new_null();
      CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
      idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_X509, nm, &cnt);
      if (idx < 0) {
          /*
           * Nothing found in cache: do lookup to possibly add new objects to
           * cache
           */
          X509_OBJECT xobj;
          CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
          if (!X509_STORE_get_by_subject(ctx, X509_LU_X509, nm, &xobj)) {
              sk_X509_free(sk);
              return NULL;
          }
          X509_OBJECT_free_contents(&xobj);
          CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
          idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_X509, nm, &cnt);
          if (idx < 0) {
              CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
              sk_X509_free(sk);
              return NULL;
          }
      }
      for (i = 0; i < cnt; i++, idx++) {
          obj = sk_X509_OBJECT_value(ctx->ctx->objs, idx);
          x = obj->data.x509;
          CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
          if (!sk_X509_push(sk, x)) {
              CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
              X509_free(x);
              sk_X509_pop_free(sk, X509_free);
              return NULL;
          }
      }
      CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
      return sk;
  
  }
  
  STACK_OF(X509_CRL) *X509_STORE_get1_crls(X509_STORE_CTX *ctx, X509_NAME *nm)
  {
      int i, idx, cnt;
      STACK_OF(X509_CRL) *sk;
      X509_CRL *x;
      X509_OBJECT *obj, xobj;
      sk = sk_X509_CRL_new_null();
      CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
  
      /*
       * Always do lookup to possibly add new CRLs to cache
       */
      CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
      if (!X509_STORE_get_by_subject(ctx, X509_LU_CRL, nm, &xobj)) {
          sk_X509_CRL_free(sk);
          return NULL;
      }
      X509_OBJECT_free_contents(&xobj);
      CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
      idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_CRL, nm, &cnt);
      if (idx < 0) {
          CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
          sk_X509_CRL_free(sk);
          return NULL;
      }
  
      for (i = 0; i < cnt; i++, idx++) {
          obj = sk_X509_OBJECT_value(ctx->ctx->objs, idx);
          x = obj->data.crl;
          CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509_CRL);
          if (!sk_X509_CRL_push(sk, x)) {
              CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
              X509_CRL_free(x);
              sk_X509_CRL_pop_free(sk, X509_CRL_free);
              return NULL;
          }
      }
      CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
      return sk;
  }
  
  X509_OBJECT *X509_OBJECT_retrieve_match(STACK_OF(X509_OBJECT) *h,
                                          X509_OBJECT *x)
  {
      int idx, i;
      X509_OBJECT *obj;
      idx = sk_X509_OBJECT_find(h, x);
      if (idx == -1)
          return NULL;
      if ((x->type != X509_LU_X509) && (x->type != X509_LU_CRL))
          return sk_X509_OBJECT_value(h, idx);
      for (i = idx; i < sk_X509_OBJECT_num(h); i++) {
          obj = sk_X509_OBJECT_value(h, i);
          if (x509_object_cmp
              ((const X509_OBJECT **)&obj, (const X509_OBJECT **)&x))
              return NULL;
          if (x->type == X509_LU_X509) {
              if (!X509_cmp(obj->data.x509, x->data.x509))
                  return obj;
          } else if (x->type == X509_LU_CRL) {
              if (!X509_CRL_match(obj->data.crl, x->data.crl))
                  return obj;
          } else
              return obj;
      }
      return NULL;
  }
  
  /*-
   * Try to get issuer certificate from store. Due to limitations
   * of the API this can only retrieve a single certificate matching
   * a given subject name. However it will fill the cache with all
   * matching certificates, so we can examine the cache for all
   * matches.
   *
   * Return values are:
   *  1 lookup successful.
   *  0 certificate not found.
   * -1 some other error.
   */
  int X509_STORE_CTX_get1_issuer(X509 **issuer, X509_STORE_CTX *ctx, X509 *x)
  {
      X509_NAME *xn;
      X509_OBJECT obj, *pobj;
      int i, ok, idx, ret;
      xn = X509_get_issuer_name(x);
      ok = X509_STORE_get_by_subject(ctx, X509_LU_X509, xn, &obj);
      if (ok != X509_LU_X509) {
          if (ok == X509_LU_RETRY) {
              X509_OBJECT_free_contents(&obj);
              X509err(X509_F_X509_STORE_CTX_GET1_ISSUER, X509_R_SHOULD_RETRY);
              return -1;
          } else if (ok != X509_LU_FAIL) {
              X509_OBJECT_free_contents(&obj);
              /* not good :-(, break anyway */
              return -1;
          }
          return 0;
      }
      /* If certificate matches all OK */
      if (ctx->check_issued(ctx, x, obj.data.x509)) {
          *issuer = obj.data.x509;
          return 1;
      }
      X509_OBJECT_free_contents(&obj);
  
      /* Else find index of first cert accepted by 'check_issued' */
      ret = 0;
      CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
      idx = X509_OBJECT_idx_by_subject(ctx->ctx->objs, X509_LU_X509, xn);
      if (idx != -1) {            /* should be true as we've had at least one
                                   * match */
          /* Look through all matching certs for suitable issuer */
          for (i = idx; i < sk_X509_OBJECT_num(ctx->ctx->objs); i++) {
              pobj = sk_X509_OBJECT_value(ctx->ctx->objs, i);
              /* See if we've run past the matches */
              if (pobj->type != X509_LU_X509)
                  break;
              if (X509_NAME_cmp(xn, X509_get_subject_name(pobj->data.x509)))
                  break;
              if (ctx->check_issued(ctx, x, pobj->data.x509)) {
                  *issuer = pobj->data.x509;
                  X509_OBJECT_up_ref_count(pobj);
                  ret = 1;
                  break;
              }
          }
      }
      CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
      return ret;
  }
  
  int X509_STORE_set_flags(X509_STORE *ctx, unsigned long flags)
  {
      return X509_VERIFY_PARAM_set_flags(ctx->param, flags);
  }
  
  int X509_STORE_set_depth(X509_STORE *ctx, int depth)
  {
      X509_VERIFY_PARAM_set_depth(ctx->param, depth);
      return 1;
  }
  
  int X509_STORE_set_purpose(X509_STORE *ctx, int purpose)
  {
      return X509_VERIFY_PARAM_set_purpose(ctx->param, purpose);
  }
  
  int X509_STORE_set_trust(X509_STORE *ctx, int trust)
  {
      return X509_VERIFY_PARAM_set_trust(ctx->param, trust);
  }
  
  int X509_STORE_set1_param(X509_STORE *ctx, X509_VERIFY_PARAM *param)
  {
      return X509_VERIFY_PARAM_set1(ctx->param, param);
  }
  
  void X509_STORE_set_verify_cb(X509_STORE *ctx,
                                int (*verify_cb) (int, X509_STORE_CTX *))
  {
      ctx->verify_cb = verify_cb;
  }
  
  void X509_STORE_set_lookup_crls_cb(X509_STORE *ctx,
                                     STACK_OF(X509_CRL) *(*cb) (X509_STORE_CTX
                                                                *ctx,
                                                                X509_NAME *nm))
  {
      ctx->lookup_crls = cb;
  }
  
  X509_STORE *X509_STORE_CTX_get0_store(X509_STORE_CTX *ctx)
  {
      return ctx->ctx;
  }
  
  IMPLEMENT_STACK_OF(X509_LOOKUP)
  
  IMPLEMENT_STACK_OF(X509_OBJECT)
  