text: /*
   * Copyright (C) 2011-2016 Intel Corporation. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   *   * Redistributions of source code must retain the above copyright
   *     notice, this list of conditions and the following disclaimer.
   *   * 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.
   *   * Neither the name of Intel Corporation nor the names of its
   *     contributors may be used to endorse or promote products derived
   *     from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "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 COPYRIGHT
   * OWNER 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.
   *
   */
  
  #ifndef _ECP_H
  #define _ECP_H
  
  #include <stdint.h>
  #include <stdlib.h>
  #include <stdbool.h>
  
  #include "remote_attestation_result.h"
  
  #include "sgx_urts.h"
  #include "sgx_tcrypto.h"
  
  
  #ifndef SAMPLE_FEBITSIZE
      #define SAMPLE_FEBITSIZE                    256
  #endif
  
  #define SAMPLE_ECP_KEY_SIZE                     (SAMPLE_FEBITSIZE/8)
  
  typedef struct sample_ec_priv_t
  {
      uint8_t r[SAMPLE_ECP_KEY_SIZE];
  } sample_ec_priv_t;
  
  typedef struct sample_ec_dh_shared_t
  {
      uint8_t s[SAMPLE_ECP_KEY_SIZE];
  }sample_ec_dh_shared_t;
  
  typedef uint8_t sample_ec_key_128bit_t[16];
  
  #define SAMPLE_EC_MAC_SIZE 16
  
  #ifdef  __cplusplus
  extern "C" {
  #endif
  
  
  #ifndef _ERRNO_T_DEFINED
  #define _ERRNO_T_DEFINED
  typedef int errno_t;
  #endif
  errno_t memcpy_s(void *dest, size_t numberOfElements, const void *src,
                   size_t count);
  
  
  #ifdef SUPPLIED_KEY_DERIVATION
  
  typedef enum _sample_derive_key_type_t
  {
      SAMPLE_DERIVE_KEY_SMK_SK = 0,
      SAMPLE_DERIVE_KEY_MK_VK,
  } sample_derive_key_type_t;
  
  bool derive_key(
      const sample_ec_dh_shared_t *p_shared_key,
      uint8_t key_id,
      sample_ec_key_128bit_t *first_derived_key,
      sample_ec_key_128bit_t *second_derived_key);
  
  #else
  
  typedef enum _sample_derive_key_type_t
  {
      SAMPLE_DERIVE_KEY_SMK = 0,
      SAMPLE_DERIVE_KEY_SK,
      SAMPLE_DERIVE_KEY_MK,
      SAMPLE_DERIVE_KEY_VK,
  } sample_derive_key_type_t;
  
  bool derive_key(
      const sample_ec_dh_shared_t *p_shared_key,
      uint8_t key_id,
      sample_ec_key_128bit_t *derived_key);
  
  #endif
  
  bool verify_cmac128(
      sample_ec_key_128bit_t mac_key,
      const uint8_t *p_data_buf,
      uint32_t buf_size,
      const uint8_t *p_mac_buf);
  #ifdef  __cplusplus
  }
  #endif
  
  #endif
  
  