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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"
- #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 <drivers/nrfx_common.h>
- #if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_CC310_BL_HASH_SHA256)
- #if defined(NRF_CRYPTO_BACKEND_CC310_BL_HASH_LITTLE_ENDIAN_DIGEST_ENABLED)
- #error The configuration NRF_CRYPTO_BACKEND_CC310_BL_HASH_LITTLE_ENDIAN_DIGEST_ENABLED was removed in SDK 15.1.0. Please see release notes for details on removing this error message.
- #endif // defined(NRF_CRYPTO_BACKEND_CC310_BL_HASH_LITTLE_ENDIAN_DIGEST_ENABLED)
- #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;
- }
- 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)
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