diff options
Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/crypto/nrf_crypto_hmac.c')
| -rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/crypto/nrf_crypto_hmac.c | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/crypto/nrf_crypto_hmac.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/crypto/nrf_crypto_hmac.c new file mode 100644 index 0000000..4bd1546 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/crypto/nrf_crypto_hmac.c @@ -0,0 +1,203 @@ +/** + * 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 "stddef.h" +#include "nrf_log.h" +#include "nrf_crypto_hmac.h" +#include "nrf_crypto_hmac_shared.h" +#include "nrf_crypto_error.h" +#include "nrf_crypto_init.h" +#include "nrf_crypto_mem.h" +#include "nrf_crypto_shared.h" + +#if NRF_MODULE_ENABLED(NRF_CRYPTO_HMAC) + +// Magic word that is set when initializing the context and checked by functions that use it. +#define NRF_CRYPTO_HMAC_INIT_MAGIC_VALUE 0xBADEBA11 + + +static ret_code_t verify_context_valid(nrf_crypto_hmac_internal_context_t * const p_context) +{ + if (p_context == NULL) + { + return NRF_ERROR_CRYPTO_CONTEXT_NULL; + } + else if (p_context->init_value != NRF_CRYPTO_HMAC_INIT_MAGIC_VALUE) + { + return NRF_ERROR_CRYPTO_CONTEXT_NOT_INITIALIZED; + } + else + { + return NRF_SUCCESS; + } +} + + +ret_code_t nrf_crypto_hmac_init(nrf_crypto_hmac_context_t * const p_context, + nrf_crypto_hmac_info_t const * p_info, + uint8_t const * p_key, + size_t key_size) +{ + ret_code_t err_code; + nrf_crypto_hmac_internal_context_t * p_ctx = (nrf_crypto_hmac_internal_context_t *)p_context; + + VERIFY_TRUE(nrf_crypto_is_initialized(), NRF_ERROR_CRYPTO_NOT_INITIALIZED); + + // Validate input + VERIFY_TRUE(p_ctx != NULL, NRF_ERROR_CRYPTO_CONTEXT_NULL); + VERIFY_TRUE(p_info != NULL, NRF_ERROR_CRYPTO_INPUT_NULL); + VERIFY_TRUE(p_key != NULL, NRF_ERROR_CRYPTO_INPUT_NULL); + VERIFY_TRUE(key_size > 0, NRF_ERROR_CRYPTO_INPUT_LENGTH); + + // Initialize generic part of the context + p_ctx->p_info = p_info; + + // Do backend specific initialization by calling the backend init function pointed + // to in the configuration struct in the context (nrf_crypto_hmac_config_t) + err_code = p_ctx->p_info->init_fn(p_context, p_key, key_size); + if (err_code == NRF_SUCCESS) + { + p_ctx->init_value = NRF_CRYPTO_HMAC_INIT_MAGIC_VALUE; + } + + return err_code; +} + + +ret_code_t nrf_crypto_hmac_update(nrf_crypto_hmac_context_t * const p_context, + uint8_t const * p_data, + size_t data_size) +{ + ret_code_t err_code; + + // The context header by definition has to be the first element of the context struct. + nrf_crypto_hmac_internal_context_t * p_ctx = (nrf_crypto_hmac_internal_context_t *)p_context; + + // Validate input + err_code = verify_context_valid(p_ctx); + VERIFY_SUCCESS(err_code); + VERIFY_TRUE(p_data != NULL, NRF_ERROR_CRYPTO_INPUT_NULL); + VERIFY_TRUE(data_size > 0, NRF_ERROR_CRYPTO_INPUT_LENGTH); + + // Call backend specific update function (pointed to by config struct in context) + err_code = p_ctx->p_info->update_fn(p_context, p_data, data_size); + + return err_code; +} + + +ret_code_t nrf_crypto_hmac_finalize(nrf_crypto_hmac_context_t * const p_context, + uint8_t * p_digest, + size_t * const p_digest_size) +{ + ret_code_t err_code; + + // The context header by definition has to be the first element of the context struct. + nrf_crypto_hmac_internal_context_t * p_ctx = (nrf_crypto_hmac_internal_context_t *)p_context; + + // Validate input + err_code = verify_context_valid(p_ctx); + VERIFY_SUCCESS(err_code); + VERIFY_TRUE(p_digest != NULL, NRF_ERROR_CRYPTO_OUTPUT_NULL); + VERIFY_TRUE(*p_digest_size >= p_ctx->p_info->digest_size, NRF_ERROR_CRYPTO_OUTPUT_LENGTH); + + // Call backend specific finish function (pointed to by config struct in context) + err_code = p_ctx->p_info->finalize_fn(p_context, p_digest, p_digest_size); + + return err_code; +} + + +ret_code_t nrf_crypto_hmac_calculate(nrf_crypto_hmac_context_t * const p_context, + nrf_crypto_hmac_info_t const * p_info, + uint8_t * p_digest, + size_t * const p_digest_size, + uint8_t const * p_key, + size_t key_size, + uint8_t const * p_data, + size_t data_size) +{ + ret_code_t err_code; + nrf_crypto_hmac_context_t * p_ctx; + void * p_allocated_context = NULL; + + // Validate input. Only validate input parameters that are used locally, others are validated + // in the init, update and/or finalize functions. + VERIFY_TRUE(p_info != NULL, NRF_ERROR_CRYPTO_INPUT_NULL); + + // Allocate context if needed (not provided by the user). + if (p_context == NULL) + { + p_allocated_context = NRF_CRYPTO_ALLOC(p_info->context_size); + if (p_allocated_context == NULL) + { + return NRF_ERROR_CRYPTO_ALLOC_FAILED; + } + p_ctx = (nrf_crypto_hmac_context_t *)p_allocated_context; + } + else + { + p_ctx = (nrf_crypto_hmac_context_t *)p_context; + } + + // Perform integrated HMAC calculation by caling the frontend functions defined in this file + err_code = nrf_crypto_hmac_init(p_ctx, p_info, p_key, key_size); + NRF_CRYPTO_VERIFY_SUCCESS_DEALLOCATE(err_code, p_allocated_context); + + err_code = nrf_crypto_hmac_update(p_ctx, p_data, data_size); + NRF_CRYPTO_VERIFY_SUCCESS_DEALLOCATE(err_code, p_allocated_context); + + err_code = nrf_crypto_hmac_finalize(p_ctx, p_digest, p_digest_size); + NRF_CRYPTO_VERIFY_SUCCESS_DEALLOCATE(err_code, p_allocated_context); + + // Free context if allocated internally + if (p_allocated_context != NULL) + { + NRF_CRYPTO_FREE(p_allocated_context); + } + + return err_code; +} + +#endif // NRF_MODULE_ENABLED(NRF_CRYPTO_HMAC) +#endif // NRF_MODULE_ENABLED(NRF_CRYPTO) |