linux-sgx-trts-modified/common/inc/internal/sgx_tcrypto_internal.h

/*
 * 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
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 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
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 *     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
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 */

#ifndef _SGX_TCRYPTO_INTERNAL_H_
#define _SGX_TCRYPTO_INTERNAL_H_

#include "sgx_tcrypto.h"

typedef struct _sgx_ec256_dh_shared512_t
{
    uint8_t x[SGX_ECP256_KEY_SIZE];
    uint8_t y[SGX_ECP256_KEY_SIZE];
} sgx_ec256_dh_shared512_t;

#ifdef __cplusplus
extern "C" {
#endif

   /* Computes 512-bit DH shared key based on private B key (local) and remote public Ga Key 
    * Parameters:
    *   Return: sgx_status_t - SGX_SUCCESS or failure as defined in sgx_error.h
    *   Inputs: sgx_ecc_state_handle_t ecc_handle - Handle to the ECC crypto system
    *           sgx_ec256_private_t *p_private_b - Pointer to the local private key
    *           sgx_ec256_public_t *p_public_ga - Pointer to the remote public key
    *   Output: sgx_ec256_dh_shared512_t *p_shared_key - Pointer to the 512-bit shared DH key
    */
    sgx_status_t SGXAPI sgx_ecc256_compute_shared_dhkey512(sgx_ec256_private_t *p_private_b, 
                                                    sgx_ec256_public_t *p_public_ga,  
                                                    sgx_ec256_dh_shared512_t *p_shared_key, 
                                                    sgx_ecc_state_handle_t ecc_handle);

#ifdef __cplusplus
}
#endif

#endif