text: /* crypto/ts/ts_verify_ctx.c */
  /*
   * Written by Zoltan Glozik (zglozik@stones.com) for the OpenSSL project
   * 2003.
   */
  /* ====================================================================
   * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
   *
   * 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 above 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 acknowledgment:
   *    "This product includes software developed by the OpenSSL Project
   *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
   *
   * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
   *    endorse or promote products derived from this software without
   *    prior written permission. For written permission, please contact
   *    licensing@OpenSSL.org.
   *
   * 5. Products derived from this software may not be called "OpenSSL"
   *    nor may "OpenSSL" appear in their names without prior written
   *    permission of the OpenSSL Project.
   *
   * 6. Redistributions of any form whatsoever must retain the following
   *    acknowledgment:
   *    "This product includes software developed by the OpenSSL Project
   *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
   *
   * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
   * EXPRESSED 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 OpenSSL PROJECT OR
   * ITS 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.
   * ====================================================================
   *
   * This product includes cryptographic software written by Eric Young
   * (eay@cryptsoft.com).  This product includes software written by Tim
   * Hudson (tjh@cryptsoft.com).
   *
   */
  
  #include "internal/cryptlib.h"
  #include <openssl/objects.h>
  #include <openssl/ts.h>
  #include "ts_lcl.h"
  
  TS_VERIFY_CTX *TS_VERIFY_CTX_new(void)
  {
      TS_VERIFY_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx));
  
      if (ctx == NULL)
          TSerr(TS_F_TS_VERIFY_CTX_NEW, ERR_R_MALLOC_FAILURE);
      return ctx;
  }
  
  void TS_VERIFY_CTX_init(TS_VERIFY_CTX *ctx)
  {
      OPENSSL_assert(ctx != NULL);
      memset(ctx, 0, sizeof(*ctx));
  }
  
  void TS_VERIFY_CTX_free(TS_VERIFY_CTX *ctx)
  {
      if (!ctx)
          return;
  
      TS_VERIFY_CTX_cleanup(ctx);
      OPENSSL_free(ctx);
  }
  
  int TS_VERIFY_CTX_add_flags(TS_VERIFY_CTX *ctx, int f)
  {
      ctx->flags |= f;
      return ctx->flags;
  }
  
  int TS_VERIFY_CTX_set_flags(TS_VERIFY_CTX *ctx, int f)
  {
      ctx->flags = f;
      return ctx->flags;
  }
  
  BIO *TS_VERIFY_CTX_set_data(TS_VERIFY_CTX *ctx, BIO *b)
  {
      ctx->data = b;
      return ctx->data;
  }
  
  X509_STORE *TS_VERIFY_CTX_set_store(TS_VERIFY_CTX *ctx, X509_STORE *s)
  {
      ctx->store = s;
      return ctx->store;
  }
  
  STACK_OF(X509) *TS_VERIFY_CTS_set_certs(TS_VERIFY_CTX *ctx,
                                          STACK_OF(X509) *certs)
  {
      ctx->certs = certs;
      return ctx->certs;
  }
  
  unsigned char *TS_VERIFY_CTX_set_imprint(TS_VERIFY_CTX *ctx,
                                           unsigned char *hexstr, long len)
  {
      ctx->imprint = hexstr;
      ctx->imprint_len = len;
      return ctx->imprint;
  }
  
  void TS_VERIFY_CTX_cleanup(TS_VERIFY_CTX *ctx)
  {
      if (!ctx)
          return;
  
      X509_STORE_free(ctx->store);
      sk_X509_pop_free(ctx->certs, X509_free);
  
      ASN1_OBJECT_free(ctx->policy);
  
      X509_ALGOR_free(ctx->md_alg);
      OPENSSL_free(ctx->imprint);
  
      BIO_free_all(ctx->data);
  
      ASN1_INTEGER_free(ctx->nonce);
  
      GENERAL_NAME_free(ctx->tsa_name);
  
      TS_VERIFY_CTX_init(ctx);
  }
  
  TS_VERIFY_CTX *TS_REQ_to_TS_VERIFY_CTX(TS_REQ *req, TS_VERIFY_CTX *ctx)
  {
      TS_VERIFY_CTX *ret = ctx;
      ASN1_OBJECT *policy;
      TS_MSG_IMPRINT *imprint;
      X509_ALGOR *md_alg;
      ASN1_OCTET_STRING *msg;
      const ASN1_INTEGER *nonce;
  
      OPENSSL_assert(req != NULL);
      if (ret)
          TS_VERIFY_CTX_cleanup(ret);
      else if ((ret = TS_VERIFY_CTX_new()) == NULL)
          return NULL;
  
      ret->flags = TS_VFY_ALL_IMPRINT & ~(TS_VFY_TSA_NAME | TS_VFY_SIGNATURE);
  
      if ((policy = req->policy_id) != NULL) {
          if ((ret->policy = OBJ_dup(policy)) == NULL)
              goto err;
      } else
          ret->flags &= ~TS_VFY_POLICY;
  
      imprint = req->msg_imprint;
      md_alg = imprint->hash_algo;
      if ((ret->md_alg = X509_ALGOR_dup(md_alg)) == NULL)
          goto err;
      msg = imprint->hashed_msg;
      ret->imprint_len = ASN1_STRING_length(msg);
      if ((ret->imprint = OPENSSL_malloc(ret->imprint_len)) == NULL)
          goto err;
      memcpy(ret->imprint, ASN1_STRING_data(msg), ret->imprint_len);
  
      if ((nonce = req->nonce) != NULL) {
          if ((ret->nonce = ASN1_INTEGER_dup(nonce)) == NULL)
              goto err;
      } else
          ret->flags &= ~TS_VFY_NONCE;
  
      return ret;
   err:
      if (ctx)
          TS_VERIFY_CTX_cleanup(ctx);
      else
          TS_VERIFY_CTX_free(ret);
      return NULL;
  }
  