/** * Copyright (c) 2018 - 2018, 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" #if NRF_MODULE_ENABLED(NRF_CRYPTO) && NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_CC310_BL) #include "nrf.h" #include "cc310_bl_backend_hash.h" #include "cc310_bl_backend_shared.h" #include "cc310_backend_mutex.h" #include "cc310_backend_shared.h" #include "nrf_cc310_bl_hash_sha256.h" #include "crys_hash_error.h" #include "nrf_crypto_init.h" #include "nrf_crypto_types.h" #include "nrf_crypto_error.h" #include "nrf_crypto_shared.h" #include "nrf_crypto_hash_shared.h" #include "sdk_macros.h" #include "nrf_log.h" #include "nrf_assert.h" #include #if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_CC310_BL_HASH_SHA256) #if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_CC310_BL_HASH_AUTOMATIC_RAM_BUFFER) __ALIGN(4) static uint8_t m_hash_buffer[NRF_CRYPTO_BACKEND_CC310_BL_HASH_AUTOMATIC_RAM_BUFFER_SIZE]; #endif // NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_CC310_BL_HASH_AUTOMATIC_RAM_BUFFER) static ret_code_t hash_result_get(CRYSError_t error) { ret_code_t ret_val; switch (error) { case CRYS_OK: ret_val = NRF_SUCCESS; break; case CRYS_HASH_INVALID_USER_CONTEXT_POINTER_ERROR: ret_val = NRF_ERROR_CRYPTO_CONTEXT_NULL; break; case CRYS_HASH_ILLEGAL_OPERATION_MODE_ERROR: ret_val = NRF_ERROR_CRYPTO_FEATURE_UNAVAILABLE; break; case CRYS_HASH_USER_CONTEXT_CORRUPTED_ERROR: ret_val = NRF_ERROR_CRYPTO_CONTEXT_NOT_INITIALIZED; break; // May be added to specialized errors for hash. case CRYS_HASH_LAST_BLOCK_ALREADY_PROCESSED_ERROR: ret_val = NRF_ERROR_CRYPTO_INTERNAL; break; case CRYS_HASH_IS_NOT_SUPPORTED: ret_val = NRF_ERROR_CRYPTO_FEATURE_UNAVAILABLE; break; default: ret_val = NRF_ERROR_CRYPTO_INTERNAL; break; } return ret_val; } static ret_code_t cc310_bl_backend_hash_sha256_init(void * const p_context) { uint32_t ret_val; CRYSError_t crys_error; // Limited parameter testing on this level. // This has been done on upper level. nrf_cc310_bl_hash_context_sha256_t * const p_backend_context = &(((nrf_crypto_backend_hash_sha256_context_t *)p_context)->context); crys_error = nrf_cc310_bl_hash_sha256_init(p_backend_context); ret_val = hash_result_get(crys_error); return ret_val; } static uint32_t cc310_bl_backend_hash_sha256_update(void * const p_context, uint8_t const * p_data, size_t size) { ret_code_t ret_val; CRYSError_t crys_error; uint32_t cur_size; uint32_t size_left; uint8_t * p_cur; bool mutex_locked; // Limited parameter testing on this level. // This has been done on upper level. nrf_cc310_bl_hash_context_sha256_t * const p_backend_context = &(((nrf_crypto_backend_hash_sha256_context_t *)p_context)->context); p_cur = (uint8_t *)p_data; size_left = size; mutex_locked = cc310_backend_mutex_trylock(); VERIFY_TRUE(mutex_locked, NRF_ERROR_CRYPTO_BUSY); cc310_bl_backend_enable(); #if defined (NRF_CRYPTO_BACKEND_CC310_BL_HASH_AUTOMATIC_RAM_BUFFER_ENABLED) && (NRF_CRYPTO_BACKEND_CC310_BL_HASH_AUTOMATIC_RAM_BUFFER_ENABLED == 1) do { // Copy a block from FLASH to RAM for use in CC310 cur_size = (size_left > NRF_CRYPTO_BACKEND_CC310_BL_HASH_AUTOMATIC_RAM_BUFFER_SIZE) ? NRF_CRYPTO_BACKEND_CC310_BL_HASH_AUTOMATIC_RAM_BUFFER_SIZE : size_left; // Copy from FLASH to ram memcpy(m_hash_buffer, p_cur, cur_size); // Update the hash with current input. crys_error = nrf_cc310_bl_hash_sha256_update(p_backend_context, m_hash_buffer, cur_size); size_left -= cur_size; p_cur += cur_size; } while(crys_error == SASI_OK && size_left > 0); #elif defined(NRF_CRYPTO_BACKEND_CC310_BL_HASH_AUTOMATIC_RAM_BUFFER_ENABLED) && (NRF_CRYPTO_BACKEND_CC310_BL_HASH_AUTOMATIC_RAM_BUFFER_ENABLED == 0) // Verify that the data is in RAM (required for CC310 hashing) VERIFY_TRUE(nrfx_is_in_ram(p_data), NRF_ERROR_CRYPTO_INPUT_LOCATION); do { // Get the largest block that can sent to the CC310 through DMA cur_size = (size_left > CC310_MAX_LENGTH_DMA_OPERATIONS) ? CC310_MAX_LENGTH_DMA_OPERATIONS : size_left; crys_error = nrf_cc310_bl_hash_sha256_update(p_backend_context, p_cur, cur_size); size_left -= cur_size; p_cur += cur_size; } while(crys_error == SASI_OK && size_left > 0); #else UNUSED_PARAMETER(p_backend_context); UNUSED_PARAMETER(cur_size); UNUSED_PARAMETER(size_left); UNUSED_PARAMETER(p_cur); #warning NRF_CRYPTO_BACKEND_CC310_BL_HASH_AUTOMATIC_RAM_BUFFER_ENABLED define not found in sdk_config.h (Is the sdk_config.h valid?). #endif cc310_bl_backend_disable(); cc310_backend_mutex_unlock(); ret_val = hash_result_get(crys_error); return ret_val; } static uint32_t cc310_bl_backend_hash_sha256_finalize(void * const p_context, uint8_t * p_digest, size_t * const p_digest_size) { ret_code_t ret_val; CRYSError_t crys_error; bool mutex_locked; // Limited parameter testing on this level. // This has been done on upper level. nrf_cc310_bl_hash_context_sha256_t * const p_backend_context = &(((nrf_crypto_backend_hash_sha256_context_t * )p_context)->context); nrf_cc310_bl_hash_digest_sha256_t * p_int_digest = (nrf_cc310_bl_hash_digest_sha256_t *)p_digest; if (NRF_CRYPTO_HASH_SIZE_SHA256 > *p_digest_size) { return NRF_ERROR_CRYPTO_OUTPUT_LENGTH; } mutex_locked = cc310_backend_mutex_trylock(); VERIFY_TRUE(mutex_locked, NRF_ERROR_CRYPTO_BUSY); cc310_bl_backend_enable(); // Do the hash finalize calculation crys_error = nrf_cc310_bl_hash_sha256_finalize(p_backend_context, p_int_digest); cc310_bl_backend_disable(); cc310_backend_mutex_unlock(); ret_val = hash_result_get(crys_error); if (ret_val == NRF_SUCCESS) { *p_digest_size = NRF_CRYPTO_HASH_SIZE_SHA256; } #if defined(NRF_CRYPTO_BACKEND_CC310_BL_HASH_LITTLE_ENDIAN_DIGEST_ENABLED) && (NRF_CRYPTO_BACKEND_CC310_BL_HASH_LITTLE_ENDIAN_DIGEST_ENABLED == 1) nrf_crypto_internal_swap_endian_in_place(p_digest, NRF_CRYPTO_HASH_SIZE_SHA256); #elif defined(NRF_CRYPTO_BACKEND_CC310_BL_HASH_LITTLE_ENDIAN_DIGEST_ENABLED) && (NRF_CRYPTO_BACKEND_CC310_BL_HASH_LITTLE_ENDIAN_DIGEST_ENABLED == 0) // Do nothing #else #warning NRF_CRYPTO_BACKEND_CC310_BL_HASH_LITTLE_ENDIAN_DIGEST_ENABLED define not found in sdk_config.h (Is the sdk_config.h valid?). #endif return ret_val; } const nrf_crypto_hash_info_t g_nrf_crypto_hash_sha256_info = { .init_fn = cc310_bl_backend_hash_sha256_init, .update_fn = cc310_bl_backend_hash_sha256_update, .finalize_fn = cc310_bl_backend_hash_sha256_finalize, .digest_size = NRF_CRYPTO_HASH_SIZE_SHA256, .hash_mode = NRF_CRYPTO_HASH_MODE_SHA256 }; #endif // NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_CC310_BL_HASH_SHA256) #endif // NRF_MODULE_ENABLED(NRF_CRYPTO) && #if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_CC310_BL)