385 lines
13 KiB
C
385 lines
13 KiB
C
/**
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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 "nrf_crypto_error.h"
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#include "mbedtls_backend_aes_aead.h"
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#if NRF_MODULE_ENABLED(NRF_CRYPTO_MBEDTLS_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 union
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{
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nrf_crypto_aead_internal_context_t header; /**< Common header for context. */
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#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_MBEDTLS_AES_CCM)
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nrf_crypto_backend_aes_ccm_context_t ccm;
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#endif
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#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_MBEDTLS_AES_GCM)
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nrf_crypto_backend_aes_gcm_context_t gcm;
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#endif
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} nrf_crypto_backend_mbedtls_aes_aead_context_t;
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static ret_code_t result_get(int 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 0:
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ret_val = NRF_SUCCESS;
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break;
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case MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA:
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ret_val = NRF_ERROR_CRYPTO_INPUT_LENGTH;
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break;
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case MBEDTLS_ERR_CIPHER_ALLOC_FAILED:
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ret_val = NRF_ERROR_CRYPTO_ALLOC_FAILED;
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break;
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case MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE:
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ret_val = NRF_ERROR_CRYPTO_FEATURE_UNAVAILABLE;
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break;
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#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_MBEDTLS_AES_CCM)
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case MBEDTLS_ERR_CCM_BAD_INPUT:
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ret_val = NRF_ERROR_CRYPTO_INVALID_PARAM;
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break;
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case MBEDTLS_ERR_CCM_AUTH_FAILED:
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ret_val = NRF_ERROR_CRYPTO_AEAD_INVALID_MAC;
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break;
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#endif
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#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_MBEDTLS_AES_GCM)
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case MBEDTLS_ERR_GCM_BAD_INPUT:
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ret_val = NRF_ERROR_CRYPTO_INVALID_PARAM;
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break;
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case MBEDTLS_ERR_GCM_AUTH_FAILED:
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ret_val = NRF_ERROR_CRYPTO_AEAD_INVALID_MAC;
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break;
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#endif
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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_mbedtls_init(void * const p_context, uint8_t * p_key)
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{
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int result;
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ret_code_t ret_val;
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nrf_crypto_backend_mbedtls_aes_aead_context_t * p_ctx =
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(nrf_crypto_backend_mbedtls_aes_aead_context_t *)p_context;
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if ((p_ctx->header.p_info->key_size != NRF_CRYPTO_KEY_SIZE_128) &&
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(p_ctx->header.p_info->key_size != NRF_CRYPTO_KEY_SIZE_192) &&
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(p_ctx->header.p_info->key_size != NRF_CRYPTO_KEY_SIZE_256))
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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_MBEDTLS_AES_CCM)
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case NRF_CRYPTO_AEAD_MODE_AES_CCM:
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mbedtls_ccm_init(&p_ctx->ccm.context);
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result = mbedtls_ccm_setkey(&p_ctx->ccm.context,
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MBEDTLS_CIPHER_ID_AES,
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p_key,
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p_ctx->header.p_info->key_size);
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break;
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#endif
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#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_MBEDTLS_AES_GCM)
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case NRF_CRYPTO_AEAD_MODE_AES_GCM:
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mbedtls_gcm_init(&p_ctx->gcm.context);
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result = mbedtls_gcm_setkey(&p_ctx->gcm.context,
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MBEDTLS_CIPHER_ID_AES,
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p_key,
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p_ctx->header.p_info->key_size);
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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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if (result != 0)
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{
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ret_val = result_get(result);
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return ret_val;
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}
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return NRF_SUCCESS;
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}
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static ret_code_t backend_mbedtls_uninit(void * const p_context)
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{
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nrf_crypto_backend_mbedtls_aes_aead_context_t * p_ctx =
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(nrf_crypto_backend_mbedtls_aes_aead_context_t *)p_context;
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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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#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_MBEDTLS_AES_CCM)
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mbedtls_ccm_free(&p_ctx->ccm.context);
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#endif
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}
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else
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{
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#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_MBEDTLS_AES_GCM)
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mbedtls_gcm_free(&p_ctx->gcm.context);
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#endif
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}
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return NRF_SUCCESS;
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}
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#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_MBEDTLS_AES_CCM)
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static ret_code_t backend_mbedtls_ccm_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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int result;
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ret_code_t ret_val;
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nrf_crypto_backend_mbedtls_aes_aead_context_t * p_ctx =
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(nrf_crypto_backend_mbedtls_aes_aead_context_t *)p_context;
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/* CCM mode allows following MAC sizes: [4, 6, 8, 10, 12, 14, 16] */
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if ((mac_size < NRF_CRYPTO_AES_CCM_MAC_MIN) || (mac_size > NRF_CRYPTO_AES_CCM_MAC_MAX) ||
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((mac_size & 0x01) != 0))
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{
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return NRF_ERROR_CRYPTO_AEAD_MAC_SIZE;
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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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return NRF_ERROR_CRYPTO_AEAD_NONCE_SIZE;
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}
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if (operation == NRF_CRYPTO_ENCRYPT)
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{
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result = mbedtls_ccm_encrypt_and_tag(&p_ctx->ccm.context,
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data_in_size,
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p_nonce,
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nonce_size,
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p_adata,
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adata_size,
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p_data_in,
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p_data_out,
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p_mac,
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(size_t)mac_size);
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}
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else if (operation == NRF_CRYPTO_DECRYPT)
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{
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result = mbedtls_ccm_auth_decrypt(&p_ctx->ccm.context,
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data_in_size,
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p_nonce,
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nonce_size,
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p_adata,
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adata_size,
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p_data_in,
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p_data_out,
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p_mac,
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(size_t)mac_size);
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}
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else
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{
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return NRF_ERROR_CRYPTO_INVALID_PARAM;
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}
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ret_val = result_get(result);
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return ret_val;
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}
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#endif
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#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_MBEDTLS_AES_GCM)
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static ret_code_t backend_mbedtls_gcm_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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int result;
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ret_code_t ret_val;
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nrf_crypto_backend_mbedtls_aes_aead_context_t * p_ctx =
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(nrf_crypto_backend_mbedtls_aes_aead_context_t *)p_context;
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/* GCM allows following MAC size: [4 ... 16] */
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if ((mac_size < NRF_CRYPTO_AES_GCM_MAC_MIN) || (mac_size > NRF_CRYPTO_AES_GCM_MAC_MAX))
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{
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return NRF_ERROR_CRYPTO_AEAD_MAC_SIZE;
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}
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if (operation == NRF_CRYPTO_ENCRYPT)
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{
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result = mbedtls_gcm_crypt_and_tag(&p_ctx->gcm.context,
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MBEDTLS_GCM_ENCRYPT,
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data_in_size,
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p_nonce,
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nonce_size,
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p_adata,
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adata_size,
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p_data_in,
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p_data_out,
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(size_t)mac_size,
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p_mac);
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ret_val = result_get(result);
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}
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else if (operation == NRF_CRYPTO_DECRYPT)
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{
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result = mbedtls_gcm_auth_decrypt(&p_ctx->gcm.context,
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data_in_size,
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p_nonce,
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nonce_size,
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p_adata,
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adata_size,
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p_mac,
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(size_t)mac_size,
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p_data_in,
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p_data_out);
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ret_val = result_get(result);
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}
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else
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{
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return NRF_ERROR_CRYPTO_INVALID_PARAM;
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}
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return ret_val;
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}
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#endif
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#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_MBEDTLS_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_mbedtls_init,
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.uninit_fn = backend_mbedtls_uninit,
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.crypt_fn = backend_mbedtls_ccm_crypt
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};
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nrf_crypto_aead_info_t const g_nrf_crypto_aes_ccm_192_info =
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{
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.key_size = NRF_CRYPTO_KEY_SIZE_192,
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.mode = NRF_CRYPTO_AEAD_MODE_AES_CCM,
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.init_fn = backend_mbedtls_init,
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.uninit_fn = backend_mbedtls_uninit,
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.crypt_fn = backend_mbedtls_ccm_crypt
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};
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nrf_crypto_aead_info_t const g_nrf_crypto_aes_ccm_256_info =
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{
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.key_size = NRF_CRYPTO_KEY_SIZE_256,
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.mode = NRF_CRYPTO_AEAD_MODE_AES_CCM,
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.init_fn = backend_mbedtls_init,
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.uninit_fn = backend_mbedtls_uninit,
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.crypt_fn = backend_mbedtls_ccm_crypt
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};
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#endif
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#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_MBEDTLS_AES_GCM)
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nrf_crypto_aead_info_t const g_nrf_crypto_aes_gcm_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_GCM,
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.init_fn = backend_mbedtls_init,
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.uninit_fn = backend_mbedtls_uninit,
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.crypt_fn = backend_mbedtls_gcm_crypt
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};
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nrf_crypto_aead_info_t const g_nrf_crypto_aes_gcm_192_info =
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{
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.key_size = NRF_CRYPTO_KEY_SIZE_192,
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.mode = NRF_CRYPTO_AEAD_MODE_AES_GCM,
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.init_fn = backend_mbedtls_init,
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.uninit_fn = backend_mbedtls_uninit,
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.crypt_fn = backend_mbedtls_gcm_crypt
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};
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nrf_crypto_aead_info_t const g_nrf_crypto_aes_gcm_256_info =
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{
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.key_size = NRF_CRYPTO_KEY_SIZE_256,
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.mode = NRF_CRYPTO_AEAD_MODE_AES_GCM,
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.init_fn = backend_mbedtls_init,
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.uninit_fn = backend_mbedtls_uninit,
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.crypt_fn = backend_mbedtls_gcm_crypt
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};
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#endif
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#endif // MODULE_ENABLED(NRF_CRYPTO_MBEDTLS_AES_AEAD)
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#endif // MODULE_ENABLED(NRF_CRYPTO)
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