/**
 * Copyright (c) 2018 - 2020, Nordic Semiconductor ASA
 *
 * 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, except as embedded into a Nordic
 *    Semiconductor ASA integrated circuit in a product or a software update for
 *    such product, 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. Neither the name of Nordic Semiconductor ASA nor the names of its
 *    contributors may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * 4. This software, with or without modification, must only be used with a
 *    Nordic Semiconductor ASA integrated circuit.
 *
 * 5. Any software provided in binary form under this license must not be reverse
 *    engineered, decompiled, modified and/or disassembled.
 *
 * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 */

#ifndef OBERON_BACKEND_ECDH_H__
#define OBERON_BACKEND_ECDH_H__

#include "sdk_config.h"
#include "nordic_common.h"

#if NRF_MODULE_ENABLED(NRF_CRYPTO) && NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON)

#include <stdint.h>
#include "nrf_crypto_ecc.h"
#include "nrf_crypto_ecdh_shared.h"


#ifdef __cplusplus
extern "C" {
#endif


#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_SECP256R1)


/** @internal See @ref nrf_crypto_backend_ecdh_compute_fn_t.
 */
ret_code_t nrf_crypto_backend_secp256r1_ecdh_compute(
    void       * p_context,
    void const * p_private_key,
    void const * p_public_key,
    uint8_t    * p_shared_secret);

// Context in not used in OBERON backend
typedef uint32_t nrf_crypto_backend_secp256r1_ecdh_context_t;
#define NRF_CRYPTO_BACKEND_SECP256R1_ECDH_CONTEXT_SIZE 0

#endif // NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_SECP256R1)

#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_CURVE25519)

/** @internal See @ref nrf_crypto_backend_ecdh_compute_fn_t.
 */
ret_code_t nrf_crypto_backend_curve25519_ecdh_compute(
    void       * p_context,
    void const * p_private_key,
    void const * p_public_key,
    uint8_t    * p_shared_secret);

// Context in not used in OBERON backend
typedef uint32_t nrf_crypto_backend_curve25519_ecdh_context_t;
#define NRF_CRYPTO_BACKEND_CURVE25519_ECDH_CONTEXT_SIZE 0

#endif // NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_CURVE25519)

#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_ED25519)

// ECDH is not possible for Ed25519
#define nrf_crypto_backend_ed25519_ecdh_compute NULL
typedef uint32_t nrf_crypto_backend_ed25519_ecdh_context_t;
#define NRF_CRYPTO_BACKEND_ED25519_ECDH_CONTEXT_SIZE 0

#endif // NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_ED25519)


#ifdef __cplusplus
}
#endif

#endif // NRF_MODULE_ENABLED(NRF_CRYPTO) && NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON)

#endif // OBERON_BACKEND_ECDH_H__
