143 lines
5.4 KiB
C
143 lines
5.4 KiB
C
/**
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* Copyright (c) 2018 - 2020, Nordic Semiconductor ASA
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef NRF_CRYPTO_RNG_SHARED_H__
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#define NRF_CRYPTO_RNG_SHARED_H__
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/** @file
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*
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* @defgroup nrf_crypto_rng_shared Types shared between all @ref nrf_crypto_rng backends.
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* @{
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* @ingroup nrf_crypto_rng
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*
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* @brief Types shared between all @ref nrf_crypto_rng backends.
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*
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* @details These types should not be used directly by the application.
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*/
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#include "sdk_common.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define NRF_CRYPTO_RNG_CONTEXT_INIT_MAGIC_VALUE (0x4d616961)
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/**
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* @internal @brief Common header for each RNG backend context.
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*
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* @details This is an internal type that should not be used directly.
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*/
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typedef struct
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{
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uint32_t init_value; //!< Contains NRF_CRYPTO_RNG_CONTEXT_INIT_MAGIC_VALUE if initialized.
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} nrf_crypto_rng_internal_context_t;
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/**
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* @internal @brief Function for initializing the RNG backend.
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*
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* @note The backend function should never be called directly.
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* Use @ref nrf_crypto_rng_init instead.
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*
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* @param[in,out] p_context Pointer to context structure.
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* @param[in,out] p_temp_buffer Temporary buffer needed during initialization of the backend.
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* @param[in] use_mutex Use mutex to prevent simultanious usage of backend resources.
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*/
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ret_code_t nrf_crypto_rng_backend_init(void * const p_context,
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void * const p_temp_buffer);
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/**
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* @internal @brief Function for uninitializing the RNG backend.
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*
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* @note The backend function should never be called directly.
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* Use @ref nrf_crypto_rng_uninit instead.
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*
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* @param[in,out] p_context Pointer to context structure.
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* @param[in] use_mutex Use mutex to prevent simultanious usage of backend resources.
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*/
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ret_code_t nrf_crypto_rng_backend_uninit(void * const p_context);
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/**
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* @internal @brief Function for retrieving a random vector from the RNG backend.
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*
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* @note The backend function should never be called directly.
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* Use @ref nrf_crypto_rng_vector_generate instead.
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*
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* @param[in,out] p_context Pointer to context structure.
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* @param[out] p_target Buffer to hold the random generated data.
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* @param[in] size Length (in bytes) to generate random data for.
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* @param[in] use_mutex Use mutex to prevent simultanious usage of backend resources.
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*/
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ret_code_t nrf_crypto_rng_backend_vector_generate(void * const p_context,
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uint8_t * const p_target,
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size_t size,
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bool use_mutex);
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/**
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* @internal @brief This function is used for reseeding the RNG with additional entropy.
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*
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* @note The backend function should never be called directly.
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* Use @ref nrf_crypto_rng_reseed instead.
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*
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* @param[in,out] p_context Pointer to context structure.
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* @param[in,out] p_temp_buffer Temporary buffer needed during initialization of the backend.
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* @param[in] p_input_data Input data used to increase the entropy.
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* @param[in] size Length of input data.
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*/
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ret_code_t nrf_crypto_rng_backend_reseed(void * const p_context,
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void * p_temp_buffer,
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uint8_t * p_input_data,
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size_t size);
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#ifdef __cplusplus
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}
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#endif
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/**@} */
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#endif // NRF_CRYPTO_RNG_SHARED_H__
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