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							- /**
 
-  * 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
 
-  * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
 
-  * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
 
-  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 
-  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 
-  * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 
-  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 
-  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 
-  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-  *
 
-  */
 
- #include "sdk_common.h"
 
- #include "sdk_config.h"
 
- #if NRF_MODULE_ENABLED(NRF_CRYPTO) && NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_MBEDTLS)
 
- #include <string.h>
 
- #include <stdint.h>
 
- #include "nrf_crypto_init.h"
 
- #include "nrf_crypto_mem.h"
 
- /*lint -save -e????*/
 
- #include "mbedtls/platform.h"
 
- /*lint -restore*/
 
- #if NRF_CRYPTO_ALLOC_ON_STACK
 
- #error "MBED TLS backend does not support memory allocation on stack. Use different allocator."
 
- #endif
 
- /** @internal @brief Function to use NRF_CRYPTO_ALLOC for MBED TLS memory allocation.
 
-  */
 
- static void * mbedtls_backend_calloc(size_t count, size_t size)
 
- {
 
-     size_t total_size = count * size;
 
-     void * p_data = NRF_CRYPTO_ALLOC(total_size);
 
-     if (p_data != NULL)
 
-     {
 
-         memset(p_data, 0, total_size);
 
-     }
 
-     return p_data;
 
- }
 
- /** @internal @brief Function to use NRF_CRYPTO_FREE for MBED TLS memory deallocation.
 
-  */
 
- static void mbedtls_backend_free(void * p_data)
 
- {
 
-     NRF_CRYPTO_FREE(p_data);
 
- }
 
- /** @internal @brief Function to initialize MBED TLS backend - setup memory management for.
 
-  */
 
- static ret_code_t mbedtls_backend_init(void)
 
- {
 
-     (void)mbedtls_platform_set_calloc_free(mbedtls_backend_calloc, mbedtls_backend_free);
 
-     return NRF_SUCCESS;
 
- }
 
- /** @internal @brief Function to uninitialize MBED TLS backend - currently no implementation is required.
 
-  */
 
- static ret_code_t mbedtls_backend_uninit(void)
 
- {
 
-     // Empty implementation
 
-     return NRF_SUCCESS;
 
- }
 
- CRYPTO_BACKEND_REGISTER(nrf_crypto_backend_info_t const mbedtls_backend) =
 
- {
 
-     .init_fn    = mbedtls_backend_init,
 
-     .uninit_fn  = mbedtls_backend_uninit,
 
- };
 
- #endif // NRF_MODULE_ENABLED(NRF_CRYPTO) && NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_MBEDTLS)
 
 
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