/** * 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 #include #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)