/**
 * 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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 * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 */

#ifndef NRF_CRYPTO_ECDSA_SHARED_H__
#define NRF_CRYPTO_ECDSA_SHARED_H__

#include <stdint.h>

#include "nordic_common.h"
#include "nrf_crypto_ecc.h"


#ifdef __cplusplus
extern "C" {
#endif


/** @internal @brief Function pointer for backend implementation of ECDSA sign.
 *
 * @note All parameters provided to the backend are vefified in frontend. Verification includes
 * checking of NULL pointers, buffer size, initialization values. Front end also take full care of
 * common ECC key hearder @ref nrf_crypto_internal_ecc_key_header_t.
 *
 * @param[in]  p_context       Pointer to context.
 * @param[in]  p_private_key   Pointer to private key.
 * @param[in]  p_data          Pointer to data to sign. Data can be a message or a hash. It depends
 *                             on which version of signing functions is pointed by this function
 *                             pointer.
 * @param[in]  data_size       Size of @p p_data.
 * @param[out] p_signature     Pointer where to put generated signature.
 */
typedef ret_code_t (*nrf_crypto_backend_ecdsa_sign_fn_t)(
    void          * p_context,
    void    const * p_private_key,
    uint8_t const * p_data,
    size_t          data_size,
    uint8_t       * p_signature);


/** @internal @brief Function pointer for backend implementation of ECDSA verify.
 *
 * @note All parameters provided to the backend are vefified in frontend. Verification includes
 * checking of NULL pointers, buffer size, initialization values. Front end also take full care of
 * common ECC key hearder @ref nrf_crypto_internal_ecc_key_header_t.
 *
 * @param[in]  p_context       Pointer to context.
 * @param[in]  p_public_key    Pointer to public key.
 * @param[in]  p_data          Pointer to data to verify. Data can be a message or a hash. It depends
 *                             on which version of signing functions is pointed by this function
 *                             pointer.
 * @param[in]  data_size       Size of @p p_data.
 * @param[in]  p_signature     Pointer to signature to verify.
 */
typedef ret_code_t (*nrf_crypto_backend_ecdsa_verify_fn_t)(
    void          * p_context,
    void    const * p_public_key,
    uint8_t const * p_data,
    size_t          data_size,
    uint8_t const * p_signature);


#ifdef __cplusplus
}
#endif

#endif // NRF_CRYPTO_ECDSA_SHARED_H__
