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xiaozhengsheng
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/**
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* Copyright (c) 2018 - 2020, Nordic Semiconductor ASA
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "sdk_common.h"
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#include <drivers/nrfx_common.h>
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#if NRF_MODULE_ENABLED(NRF_CRYPTO)
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#include <stdbool.h>
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#include "crys_aesccm_error.h"
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#include "cc310_backend_aes_aead.h"
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#include "cc310_backend_mutex.h"
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#include "cc310_backend_shared.h"
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#if NRF_MODULE_ENABLED(NRF_CRYPTO_CC310_AES_AEAD)
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/**@internal @brief Type declaration of a template suiting all possible context sizes
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* for this backend.
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*/
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typedef struct
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{
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nrf_crypto_aead_internal_context_t header; /**< Common header for context. */
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CRYS_AESCCM_UserContext_t context;
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uint8_t key[16]; /**< Only supported key size by CC310 is 128 bit */
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} nrf_crypto_backend_cc310_aes_aead_context_t;
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static ret_code_t result_get(CRYSError_t error)
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{
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ret_code_t ret_val;
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switch (error)
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{
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case CRYS_OK:
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ret_val = NRF_SUCCESS;
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break;
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case CRYS_AESCCM_INVALID_USER_CONTEXT_POINTER_ERROR:
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ret_val = NRF_ERROR_CRYPTO_CONTEXT_NULL;
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break;
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case CRYS_AESCCM_ILLEGAL_KEY_SIZE_ERROR:
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ret_val = NRF_ERROR_CRYPTO_KEY_SIZE;
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break;
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case CRYS_AESCCM_ILLEGAL_TAG_SIZE_ERROR:
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ret_val = NRF_ERROR_CRYPTO_AEAD_MAC_SIZE;
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break;
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case CRYS_AESCCM_ILLEGAL_NONCE_SIZE_ERROR:
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ret_val = NRF_ERROR_CRYPTO_AEAD_NONCE_SIZE;
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break;
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case CRYS_AESCCM_ILLEGAL_PARAMETER_SIZE_ERROR:
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case CRYS_AESCCM_DATA_IN_SIZE_ILLEGAL:
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ret_val = NRF_ERROR_CRYPTO_INPUT_LENGTH;
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break;
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case CRYS_AESCCM_INVALID_KEY_POINTER_ERROR:
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case CRYS_AESCCM_ILLEGAL_PARAMETER_PTR_ERROR:
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case CRYS_AESCCM_DATA_IN_POINTER_INVALID_ERROR:
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ret_val = NRF_ERROR_CRYPTO_INPUT_NULL;
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break;
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case CRYS_AESCCM_IS_NOT_SUPPORTED:
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case CRYS_AESCCM_INVALID_ENCRYPT_MODE_ERROR:
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ret_val = NRF_ERROR_CRYPTO_FEATURE_UNAVAILABLE;
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break;
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case CRYS_AESCCM_DATA_OUT_SIZE_INVALID_ERROR:
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ret_val = NRF_ERROR_CRYPTO_OUTPUT_LENGTH;
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break;
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case CRYS_AESCCM_DATA_OUT_POINTER_INVALID_ERROR:
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ret_val = NRF_ERROR_CRYPTO_OUTPUT_NULL;
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break;
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case CRYS_AESCCM_ILLEGAL_PARAMETER_ERROR:
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ret_val = NRF_ERROR_CRYPTO_INVALID_PARAM;
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break;
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case CRYS_AESCCM_CCM_MAC_INVALID_ERROR:
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ret_val = NRF_ERROR_CRYPTO_AEAD_INVALID_MAC;
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break;
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case CRYS_AESCCM_CTX_SIZES_ERROR:
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default:
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ret_val = NRF_ERROR_CRYPTO_INTERNAL;
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break;
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}
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return ret_val;
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}
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static ret_code_t backend_cc310_init(void * const p_context, uint8_t * p_key)
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{
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ret_code_t ret_val;
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nrf_crypto_backend_cc310_aes_aead_context_t * p_ctx =
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(nrf_crypto_backend_cc310_aes_aead_context_t *)p_context;
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if (!nrfx_is_in_ram(p_ctx))
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{
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return NRF_ERROR_CRYPTO_INPUT_LOCATION;
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}
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if (p_ctx->header.p_info->key_size != NRF_CRYPTO_KEY_SIZE_128)
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{
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return NRF_ERROR_CRYPTO_KEY_SIZE;
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}
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switch (p_ctx->header.p_info->mode)
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{
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#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_CC310_AES_CCM)
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case NRF_CRYPTO_AEAD_MODE_AES_CCM:
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ret_val = NRF_SUCCESS;
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break;
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#endif
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#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_CC310_AES_CCM_STAR)
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case NRF_CRYPTO_AEAD_MODE_AES_CCM_STAR:
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ret_val = NRF_SUCCESS;
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break;
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#endif
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default:
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return NRF_ERROR_CRYPTO_FEATURE_UNAVAILABLE;
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}
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memcpy(p_ctx->key, p_key, sizeof(p_ctx->key));
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return ret_val;
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}
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static ret_code_t backend_cc310_uninit(void * const p_context)
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{
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nrf_crypto_backend_cc310_aes_aead_context_t * p_ctx =
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(nrf_crypto_backend_cc310_aes_aead_context_t *)p_context;
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memset(&p_ctx->context, 0, sizeof(CRYS_AESCCM_UserContext_t));
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return NRF_SUCCESS;
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}
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static ret_code_t backend_cc310_crypt(void * const p_context,
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nrf_crypto_operation_t operation,
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uint8_t * p_nonce,
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uint8_t nonce_size,
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uint8_t * p_adata,
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size_t adata_size,
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uint8_t * p_data_in,
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size_t data_in_size,
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uint8_t * p_data_out,
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uint8_t * p_mac,
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uint8_t mac_size)
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{
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uint32_t mode;
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CRYSError_t result;
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ret_code_t ret_val;
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bool mutex_locked;
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SaSiAesEncryptMode_t operation_cc310;
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CRYS_AESCCM_Mac_Res_t mac_buffer;
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nrf_crypto_backend_cc310_aes_aead_context_t * p_ctx =
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(nrf_crypto_backend_cc310_aes_aead_context_t *)p_context;
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mutex_locked = cc310_backend_mutex_trylock();
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VERIFY_TRUE(mutex_locked, NRF_ERROR_CRYPTO_BUSY);
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if (!nrfx_is_in_ram(p_adata) && (adata_size > 0))
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{
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ret_val = NRF_ERROR_CRYPTO_INPUT_LOCATION;
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goto exit;
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}
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/* CC310 supports: CCM & CCM*, where nonce_size must be > 0, so p_nonce must always
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point to RAM. */
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if (!nrfx_is_in_ram(p_nonce) ||
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!nrfx_is_in_ram(p_data_in) ||
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!nrfx_is_in_ram(p_data_out) ||
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!nrfx_is_in_ram(p_mac))
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{
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ret_val = NRF_ERROR_CRYPTO_INPUT_LOCATION;
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goto exit;
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}
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if (operation == NRF_CRYPTO_DECRYPT)
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{
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operation_cc310 = SASI_AES_DECRYPT;
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}
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else if (operation == NRF_CRYPTO_ENCRYPT)
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{
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operation_cc310 = SASI_AES_ENCRYPT;
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}
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else
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{
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ret_val = NRF_ERROR_CRYPTO_INVALID_PARAM;
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goto exit;
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}
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if (p_ctx->header.p_info->mode == NRF_CRYPTO_AEAD_MODE_AES_CCM)
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{
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mode = CRYS_AESCCM_MODE_CCM;
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/* Allowed MAC size in CCM mode: [4, 6, 8, 10, 12, 14, 16] */
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if ((mac_size < NRF_CRYPTO_AES_CCM_MAC_MIN) ||
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(mac_size > NRF_CRYPTO_AES_CCM_MAC_MAX) ||
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((mac_size & 0x01) != 0))
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{
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ret_val = NRF_ERROR_CRYPTO_AEAD_MAC_SIZE;
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goto exit;
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}
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if ((nonce_size < NRF_CRYPTO_AES_CCM_NONCE_SIZE_MIN) ||
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(nonce_size > NRF_CRYPTO_AES_CCM_NONCE_SIZE_MAX))
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{
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ret_val = NRF_ERROR_CRYPTO_AEAD_NONCE_SIZE;
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goto exit;
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}
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}
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else
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{
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mode = CRYS_AESCCM_MODE_STAR;
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/* Allowed MAC size in CCM* mode: [0, 4, 8, 16] */
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if ((mac_size | NRF_CRYPTO_AES_CCM_STAR_MAC_BITMASK) != NRF_CRYPTO_AES_CCM_STAR_MAC_BITMASK)
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{
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ret_val = NRF_ERROR_CRYPTO_AEAD_MAC_SIZE;
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goto exit;
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}
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/* Allowed nonce size in CCM* mode: [13] */
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if (nonce_size != NRF_CRYPTO_AES_CCM_STAR_NONCE_SIZE)
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{
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ret_val = NRF_ERROR_CRYPTO_AEAD_NONCE_SIZE;
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goto exit;
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}
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}
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result = CC_AESCCM_Init(&p_ctx->context,
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operation_cc310,
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p_ctx->key,
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CRYS_AES_Key128BitSize, // the only allowed key size for CC310
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(uint32_t)adata_size,
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(uint32_t)data_in_size,
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p_nonce,
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nonce_size,
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mac_size,
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mode);
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ret_val = result_get(result);
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if (ret_val != NRF_SUCCESS)
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{
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goto exit;
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}
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if ((adata_size > 0) && (p_adata != NULL))
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{
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result = CRYS_AESCCM_BlockAdata(&p_ctx->context,
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p_adata,
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(uint32_t)adata_size);
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ret_val = result_get(result);
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if (ret_val != NRF_SUCCESS)
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{
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goto exit;
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}
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}
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/* CC310 backend always needs 16 bytes buffer for MAC calculation. */
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memcpy(mac_buffer, p_mac, mac_size);
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result = CRYS_AESCCM_Finish(&p_ctx->context,
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p_data_in,
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(uint32_t)data_in_size,
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p_data_out,
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mac_buffer,
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&mac_size);
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ret_val = result_get(result);
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if (ret_val == NRF_SUCCESS)
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{
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memcpy(p_mac, mac_buffer, mac_size);
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}
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exit:
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cc310_backend_mutex_unlock();
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return ret_val;
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}
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#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_CC310_AES_CCM)
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nrf_crypto_aead_info_t const g_nrf_crypto_aes_ccm_128_info =
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{
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.key_size = NRF_CRYPTO_KEY_SIZE_128,
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.mode = NRF_CRYPTO_AEAD_MODE_AES_CCM,
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.init_fn = backend_cc310_init,
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.uninit_fn = backend_cc310_uninit,
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.crypt_fn = backend_cc310_crypt
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};
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#endif
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#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_CC310_AES_CCM_STAR)
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nrf_crypto_aead_info_t const g_nrf_crypto_aes_ccm_star_128_info =
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{
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.key_size = NRF_CRYPTO_KEY_SIZE_128,
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.mode = NRF_CRYPTO_AEAD_MODE_AES_CCM_STAR,
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.init_fn = backend_cc310_init,
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.uninit_fn = backend_cc310_uninit,
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.crypt_fn = backend_cc310_crypt
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};
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#endif
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#endif // NRF_MODULE_ENABLED(NRF_CRYPTO_CC310_AES_AEAD)
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#endif // NRF_MODULE_ENABLED(NRF_CRYPTO)
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