text: /*
   * Written by Rob Stradling (rob@comodo.com) and Stephen Henson
   * (steve@openssl.org) for the OpenSSL project 2014.
   */
  /* ====================================================================
   * Copyright (c) 2014 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).
   *
   */
  
  #ifndef OPENSSL_NO_CT
  
  # include <limits.h>
  # include "internal/cryptlib.h"
  # include "../../ssl/ssl_locl.h"
  # include "internal/ct_int.h"
  
  SCT *SCT_new(void)
  {
      SCT *sct = OPENSSL_zalloc(sizeof(SCT));
      if (sct == NULL) {
          CTerr(CT_F_SCT_NEW, ERR_R_MALLOC_FAILURE);
          return NULL;
      }
      sct->entry_type = UNSET_ENTRY;
      sct->version = UNSET_VERSION;
      return sct;
  }
  
  void SCT_free(SCT *sct)
  {
      if (sct) {
          OPENSSL_free(sct->log_id);
          OPENSSL_free(sct->ext);
          OPENSSL_free(sct->sig);
          OPENSSL_free(sct->sct);
          OPENSSL_free(sct);
      }
  }
  
  int SCT_set_version(SCT *sct, sct_version_t version)
  {
      if (version != SCT_V1) {
          CTerr(CT_F_SCT_SET_VERSION, CT_R_UNSUPPORTED_VERSION);
          return 0;
      }
      sct->version = version;
      return 1;
  }
  
  int SCT_set_log_entry_type(SCT *sct, log_entry_type_t entry_type)
  {
      if (entry_type != X509_ENTRY && entry_type != PRECERT_ENTRY) {
          CTerr(CT_F_SCT_SET_LOG_ENTRY_TYPE, CT_R_UNSUPPORTED_ENTRY_TYPE);
          return 0;
      }
      sct->entry_type = entry_type;
      return 1;
  }
  
  int SCT_set0_log_id(SCT *sct, unsigned char *log_id, size_t log_id_len)
  {
      /* Currently only SHA-256 allowed so length must be SCT_V1_HASHLEN */
      if (log_id_len != SCT_V1_HASHLEN) {
          CTerr(CT_F_SCT_SET0_LOG_ID, CT_R_INVALID_LOG_ID_LENGTH);
          return 0;
      }
      OPENSSL_free(sct->log_id);
      sct->log_id = log_id;
      sct->log_id_len = log_id_len;
      return 1;
  }
  
  void SCT_set_timestamp(SCT *sct, uint64_t timestamp)
  {
      sct->timestamp = timestamp;
  }
  
  int SCT_set_signature_nid(SCT *sct, int nid)
  {
    switch (nid) {
      case NID_sha256WithRSAEncryption:
          sct->hash_alg = TLSEXT_hash_sha256;
          sct->sig_alg = TLSEXT_signature_rsa;
          return 1;
      case NID_ecdsa_with_SHA256:
          sct->hash_alg = TLSEXT_hash_sha256;
          sct->sig_alg = TLSEXT_signature_ecdsa;
          return 1;
      default:
          CTerr(CT_F_SCT_SET_SIGNATURE_NID, CT_R_UNRECOGNIZED_SIGNATURE_NID);
          return 0;
      }
  }
  
  void SCT_set0_extensions(SCT *sct, unsigned char *ext, size_t ext_len)
  {
      OPENSSL_free(sct->ext);
      sct->ext = ext;
      sct->ext_len = ext_len;
  }
  
  void SCT_set0_signature(SCT *sct, unsigned char *sig, size_t sig_len)
  {
      OPENSSL_free(sct->sig);
      sct->sig = sig;
      sct->sig_len = sig_len;
  }
  
  sct_version_t SCT_get_version(const SCT *sct)
  {
      return sct->version;
  }
  
  log_entry_type_t SCT_get_log_entry_type(const SCT *sct)
  {
      return sct->entry_type;
  }
  
  size_t SCT_get0_log_id(const SCT *sct, unsigned char **log_id)
  {
      *log_id = sct->log_id;
      return sct->log_id_len;
  }
  
  uint64_t SCT_get_timestamp(const SCT *sct)
  {
      return sct->timestamp;
  }
  
  int SCT_get_signature_nid(const SCT *sct)
  {
      if (sct->version == SCT_V1) {
          if (sct->hash_alg == TLSEXT_hash_sha256) {
              switch (sct->sig_alg) {
              case TLSEXT_signature_ecdsa:
                  return NID_ecdsa_with_SHA256;
              case TLSEXT_signature_rsa:
                  return NID_sha256WithRSAEncryption;
              default:
                  return NID_undef;
              }
          }
      }
      return NID_undef;
  }
  
  size_t SCT_get0_extensions(const SCT *sct, unsigned char **ext)
  {
      *ext = sct->ext;
      return sct->ext_len;
  }
  
  size_t SCT_get0_signature(const SCT *sct, unsigned char **sig)
  {
      *sig = sct->sig;
      return sct->sig_len;
  }
  
  #endif
  