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Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/crypto/backend/cifra/cifra_backend_aes_aead.c')
| -rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/crypto/backend/cifra/cifra_backend_aes_aead.c | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/crypto/backend/cifra/cifra_backend_aes_aead.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/crypto/backend/cifra/cifra_backend_aes_aead.c new file mode 100644 index 0000000..23b3cb6 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/crypto/backend/cifra/cifra_backend_aes_aead.c @@ -0,0 +1,205 @@ +/** + * 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) + +#include <stdbool.h> +#include "cifra_backend_aes_aead.h" + +#if NRF_MODULE_ENABLED(NRF_CRYPTO_CIFRA_AES_AEAD) + +/**@internal @brief Type declaration of a template matching all possible context sizes + * for this backend. + */ +typedef struct +{ + nrf_crypto_aead_internal_context_t header; /**< Common header for context. */ + cf_aes_context context; +} nrf_crypto_backend_cifra_aes_aead_context_t; + + +static ret_code_t result_get(int error) +{ + switch (error) + { + case 0: + return NRF_SUCCESS; + + case 1: + return NRF_ERROR_CRYPTO_AEAD_INVALID_MAC; + + default: + return NRF_ERROR_CRYPTO_INTERNAL; + } +} + +static ret_code_t backend_cifra_init(void * const p_context, uint8_t * p_key) +{ + nrf_crypto_backend_cifra_aes_aead_context_t * p_ctx = + (nrf_crypto_backend_cifra_aes_aead_context_t *)p_context; + + if ((p_ctx->header.p_info->key_size != NRF_CRYPTO_KEY_SIZE_128) && + (p_ctx->header.p_info->key_size != NRF_CRYPTO_KEY_SIZE_192) && + (p_ctx->header.p_info->key_size != NRF_CRYPTO_KEY_SIZE_256)) + { + return NRF_ERROR_CRYPTO_KEY_SIZE; + } + + VERIFY_TRUE((p_ctx->header.p_info->mode == NRF_CRYPTO_AEAD_MODE_AES_EAX), + NRF_ERROR_CRYPTO_FEATURE_UNAVAILABLE); + + cf_aes_init(&p_ctx->context, + p_key, + (p_ctx->header.p_info->key_size)>>3); // >>3: changes bits to bytes + + return NRF_SUCCESS; +} + + +static ret_code_t backend_cifra_uninit(void * const p_context) +{ + nrf_crypto_backend_cifra_aes_aead_context_t * p_ctx = + (nrf_crypto_backend_cifra_aes_aead_context_t *)p_context; + + cf_aes_finish(&p_ctx->context); + + return NRF_SUCCESS; +} + +static ret_code_t backend_cifra_crypt(void * const p_context, + nrf_crypto_operation_t operation, + uint8_t * p_nonce, + uint8_t nonce_size, + uint8_t * p_adata, + size_t adata_size, + uint8_t * p_data_in, + size_t data_in_size, + uint8_t * p_data_out, + uint8_t * p_mac, + uint8_t mac_size) +{ + + int result; + ret_code_t ret_val; + + nrf_crypto_backend_cifra_aes_aead_context_t * p_ctx = + (nrf_crypto_backend_cifra_aes_aead_context_t *)p_context; + + ret_val = NRF_SUCCESS; + + /* EAX mode allows following mac size: [1 ... 16] */ + if ((mac_size < 1) || (mac_size > NRF_CRYPTO_AES_BLOCK_SIZE)) + { + return NRF_ERROR_CRYPTO_AEAD_MAC_SIZE; + } + + if (operation == NRF_CRYPTO_ENCRYPT) + { + cf_eax_encrypt(&cf_aes, + &p_ctx->context, + p_data_in, + data_in_size, + p_adata, + adata_size, + p_nonce, + (size_t)nonce_size, + p_data_out, + p_mac, + mac_size); + } + else if (operation == NRF_CRYPTO_DECRYPT) + { + result = cf_eax_decrypt(&cf_aes, + &p_ctx->context, + p_data_in, + data_in_size, + p_adata, + adata_size, + p_nonce, + (size_t)nonce_size, + p_mac, + mac_size, + p_data_out); + ret_val = result_get(result); + } + else + { + return NRF_ERROR_CRYPTO_INVALID_PARAM; + } + + return ret_val; +} + +#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_CIFRA_AES_EAX) +nrf_crypto_aead_info_t const g_nrf_crypto_aes_eax_128_info = +{ + .key_size = NRF_CRYPTO_KEY_SIZE_128, + .mode = NRF_CRYPTO_AEAD_MODE_AES_EAX, + + .init_fn = backend_cifra_init, + .uninit_fn = backend_cifra_uninit, + .crypt_fn = backend_cifra_crypt +}; + +nrf_crypto_aead_info_t const g_nrf_crypto_aes_eax_192_info = +{ + .key_size = NRF_CRYPTO_KEY_SIZE_192, + .mode = NRF_CRYPTO_AEAD_MODE_AES_EAX, + + .init_fn = backend_cifra_init, + .uninit_fn = backend_cifra_uninit, + .crypt_fn = backend_cifra_crypt +}; + +nrf_crypto_aead_info_t const g_nrf_crypto_aes_eax_256_info = +{ + .key_size = NRF_CRYPTO_KEY_SIZE_256, + .mode = NRF_CRYPTO_AEAD_MODE_AES_EAX, + + .init_fn = backend_cifra_init, + .uninit_fn = backend_cifra_uninit, + .crypt_fn = backend_cifra_crypt +}; +#endif + +#endif // MODULE_ENABLED(NRF_CRYPTO_AES_CCM_BACKEND_MBEDTLS) +#endif // MODULE_ENABLED(NRF_CRYPTO) |