107 lines
3.6 KiB
C
107 lines
3.6 KiB
C
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/**
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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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#include "sdk_common.h"
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#include "sdk_config.h"
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#if NRF_MODULE_ENABLED(NRF_CRYPTO) && NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_MBEDTLS)
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#include <string.h>
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#include <stdint.h>
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#include "nrf_crypto_init.h"
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#include "nrf_crypto_mem.h"
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/*lint -save -e????*/
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#include "mbedtls/platform.h"
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/*lint -restore*/
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#if NRF_CRYPTO_ALLOC_ON_STACK
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#error "MBED TLS backend does not support memory allocation on stack. Use different allocator."
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#endif
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/** @internal @brief Function to use NRF_CRYPTO_ALLOC for MBED TLS memory allocation.
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*/
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static void * mbedtls_backend_calloc(size_t count, size_t size)
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{
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size_t total_size = count * size;
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void * p_data = NRF_CRYPTO_ALLOC(total_size);
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if (p_data != NULL)
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{
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memset(p_data, 0, total_size);
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}
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return p_data;
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}
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/** @internal @brief Function to use NRF_CRYPTO_FREE for MBED TLS memory deallocation.
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*/
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static void mbedtls_backend_free(void * p_data)
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{
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NRF_CRYPTO_FREE(p_data);
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}
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/** @internal @brief Function to initialize MBED TLS backend - setup memory management for.
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*/
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static ret_code_t mbedtls_backend_init(void)
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{
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(void)mbedtls_platform_set_calloc_free(mbedtls_backend_calloc, mbedtls_backend_free);
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return NRF_SUCCESS;
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}
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/** @internal @brief Function to uninitialize MBED TLS backend - currently no implementation is required.
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*/
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static ret_code_t mbedtls_backend_uninit(void)
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{
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// Empty implementation
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return NRF_SUCCESS;
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}
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CRYPTO_BACKEND_REGISTER(nrf_crypto_backend_info_t const mbedtls_backend) =
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{
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.init_fn = mbedtls_backend_init,
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.uninit_fn = mbedtls_backend_uninit,
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};
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#endif // NRF_MODULE_ENABLED(NRF_CRYPTO) && NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_MBEDTLS)
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