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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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