/**
 * 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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 */

#include "sdk_common.h"
#if NRF_MODULE_ENABLED(NRF_CRYPTO) && \
    NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_NRF_HW_RNG) && \
    !NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_NRF_HW_RNG_MBEDTLS_CTR_DRBG)

#include "nrf_crypto_rng.h"
#include "nrf_drv_rng.h"


ret_code_t nrf_crypto_rng_backend_init(void * const p_context,
                                       void * const p_temp_buffer)
{
    ret_code_t ret_val;
    
    UNUSED_PARAMETER(p_context);
    UNUSED_PARAMETER(p_temp_buffer);

    ret_val = nrf_drv_rng_init(NULL);

    return ret_val;
}


ret_code_t nrf_crypto_rng_backend_uninit(void * const p_context)
{
    UNUSED_PARAMETER(p_context);
    
    nrf_drv_rng_uninit();

    return NRF_SUCCESS;
}


ret_code_t nrf_crypto_rng_backend_vector_generate(void      * const p_context,
                                                  uint8_t   * const p_target,
                                                  size_t            size,
                                                  bool              use_mutex)
{
    UNUSED_PARAMETER(use_mutex);
    UNUSED_PARAMETER(p_context);

    nrf_drv_rng_block_rand(p_target, size);

    return NRF_SUCCESS;
}


ret_code_t nrf_crypto_rng_backend_reseed(void   * const p_context,
                                         void         * p_temp_buffer,
                                         uint8_t      * p_input_data,
                                         size_t         size)
{
    UNUSED_PARAMETER(p_context);
    UNUSED_PARAMETER(p_temp_buffer);
    UNUSED_PARAMETER(p_input_data);
    UNUSED_PARAMETER(size);
    
    return NRF_ERROR_CRYPTO_FEATURE_UNAVAILABLE;
}

#endif //NRF_MODULE_ENABLED(NRF_CRYPTO) && NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_NRF_HW_RNG) && !NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_NRF_HW_RNG_MBEDTLS_CTR_DRBG)
