231 lines
8.8 KiB
C
231 lines
8.8 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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#if NRF_MODULE_ENABLED(NRF_CRYPTO) && NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_MBEDTLS)
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#include "nrf_log.h"
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#include "nrf_crypto_error.h"
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#include "nrf_crypto_types.h"
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#include "mbedtls_backend_hmac.h"
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#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_MBEDTLS_HMAC_SHA256)
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static ret_code_t mbedtls_backend_hmac_init_sha256(void * const p_context,
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uint8_t const * p_key,
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size_t key_size)
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{
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int err_code;
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nrf_crypto_backend_mbedtls_hmac_sha256_context_t * p_ctx =
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(nrf_crypto_backend_mbedtls_hmac_sha256_context_t *)p_context;
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// Memset context to 0. This is equevalend with a call to mbedtls_md_init().
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memset(p_ctx->md_ctx_buffer, 0, sizeof(p_ctx->md_ctx_buffer));
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memset(p_ctx->hmac_ctx_buffer, 0, sizeof(p_ctx->hmac_ctx_buffer));
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// Set info and context pointers to buffer allocated by user.
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// This is Normally handled by mbedtls_md_setup(), but has to be done here in order
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// to avoid dynamic allocation of memory inside mbed TLS.
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p_ctx->mbedtls_ctx.md_info = mbedtls_md_info_from_type(MBEDTLS_MD_SHA256);
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p_ctx->mbedtls_ctx.md_ctx = p_ctx->md_ctx_buffer;
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p_ctx->mbedtls_ctx.hmac_ctx = p_ctx->hmac_ctx_buffer;
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// Enter key to start
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err_code = mbedtls_md_hmac_starts(&p_ctx->mbedtls_ctx,
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p_key,
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key_size);
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if (err_code != 0)
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{
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NRF_LOG_ERROR("Error in mbedtls_md_hmac_starts: %u", err_code);
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return NRF_ERROR_CRYPTO_INTERNAL;
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}
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return NRF_SUCCESS;
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}
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static ret_code_t mbedtls_backend_hmac_update_sha256(void * const p_context,
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uint8_t const * p_data,
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size_t size)
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{
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int err_code;
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nrf_crypto_backend_mbedtls_hmac_sha256_context_t * p_ctx =
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(nrf_crypto_backend_mbedtls_hmac_sha256_context_t *)p_context;
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err_code = mbedtls_md_hmac_update(&p_ctx->mbedtls_ctx, p_data, size);
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if (err_code != 0)
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{
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NRF_LOG_ERROR("Error in mbedtls_md_hmac_update: %u", err_code);
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return NRF_ERROR_CRYPTO_INTERNAL;
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}
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return NRF_SUCCESS;
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}
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static ret_code_t mbedtls_backend_hmac_finalize_sha256(void * const p_context,
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uint8_t * p_digest,
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size_t * const p_size)
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{
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int err_code;
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nrf_crypto_backend_mbedtls_hmac_sha256_context_t * const p_ctx =
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(nrf_crypto_backend_mbedtls_hmac_sha256_context_t *)p_context;
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// Set the digest length to 0 so that this is used in case of any error.
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*p_size = 0;
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err_code = mbedtls_md_hmac_finish(&p_ctx->mbedtls_ctx, p_digest);
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if (err_code != 0)
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{
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NRF_LOG_ERROR("Error in mbedtls_md_hmac_finish: %u", err_code);
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return NRF_ERROR_CRYPTO_INTERNAL;
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}
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*p_size = p_ctx->header.p_info->digest_size;
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return NRF_SUCCESS;
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}
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// Information structure for HMAC SHA256 using mbed TLS backend.
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const nrf_crypto_hmac_info_t g_nrf_crypto_hmac_sha256_info =
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{
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.init_fn = mbedtls_backend_hmac_init_sha256,
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.update_fn = mbedtls_backend_hmac_update_sha256,
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.finalize_fn = mbedtls_backend_hmac_finalize_sha256,
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.digest_size = NRF_CRYPTO_HASH_SIZE_SHA256,
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.context_size = sizeof(nrf_crypto_backend_hmac_sha256_context_t),
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.type = NRF_CRYPTO_HMAC_SHA256_TYPE
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};
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#endif // NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_MBEDTLS_HMAC_SHA256)
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#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_MBEDTLS_HMAC_SHA512)
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static ret_code_t mbedtls_backend_hmac_init_sha512(void * const p_context,
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uint8_t const * p_key,
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size_t key_size)
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{
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int err_code;
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nrf_crypto_backend_mbedtls_hmac_sha512_context_t * p_ctx =
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(nrf_crypto_backend_mbedtls_hmac_sha512_context_t *)p_context;
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// Memset context to 0. This is equevalend with a call to mbedtls_md_init().
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memset(p_ctx->md_ctx_buffer, 0, sizeof(p_ctx->md_ctx_buffer));
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memset(p_ctx->hmac_ctx_buffer, 0, sizeof(p_ctx->hmac_ctx_buffer));
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// Set info and context pointers to buffer allocated by user.
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// (Normally handled by mbedtls_md_setup())
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p_ctx->mbedtls_ctx.md_info = mbedtls_md_info_from_type(MBEDTLS_MD_SHA512);
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p_ctx->mbedtls_ctx.md_ctx = p_ctx->md_ctx_buffer;
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p_ctx->mbedtls_ctx.hmac_ctx = p_ctx->hmac_ctx_buffer;
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// Enter key to start
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err_code = mbedtls_md_hmac_starts(&p_ctx->mbedtls_ctx, p_key, key_size);
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if (err_code != 0)
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{
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NRF_LOG_ERROR("Error in mbedtls_md_hmac_starts: %u", err_code);
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return NRF_ERROR_CRYPTO_INTERNAL;
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}
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return NRF_SUCCESS;
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}
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static ret_code_t mbedtls_backend_hmac_update_sha512(void * const p_context,
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uint8_t const * p_data,
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size_t size)
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{
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int err_code;
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nrf_crypto_backend_mbedtls_hmac_sha512_context_t * p_ctx =
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(nrf_crypto_backend_mbedtls_hmac_sha512_context_t *)p_context;
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err_code = mbedtls_md_hmac_update(&p_ctx->mbedtls_ctx, p_data, size);
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if (err_code != 0)
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{
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NRF_LOG_ERROR("Error in mbedtls_md_hmac_update: %u", err_code);
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return NRF_ERROR_CRYPTO_INTERNAL;
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}
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return NRF_SUCCESS;
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}
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static ret_code_t mbedtls_backend_hmac_finalize_sha512(void * const p_context,
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uint8_t * p_digest,
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size_t * const p_size)
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{
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int err_code;
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nrf_crypto_backend_mbedtls_hmac_sha512_context_t * p_ctx =
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(nrf_crypto_backend_mbedtls_hmac_sha512_context_t *)p_context;
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// Set the digest length to 0 so that this is used in case of any error.
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*p_size = 0;
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err_code = mbedtls_md_hmac_finish(&p_ctx->mbedtls_ctx, p_digest);
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if (err_code != 0)
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{
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NRF_LOG_ERROR("Error in mbedtls_md_hmac_finish: %u", err_code);
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return NRF_ERROR_CRYPTO_INTERNAL; }
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*p_size = p_ctx->header.p_info->digest_size;
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return NRF_SUCCESS;
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}
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// Information structure for HMAC SHA512 using mbed TLS backend.
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const nrf_crypto_hmac_info_t g_nrf_crypto_hmac_sha512_info =
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{
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.init_fn = mbedtls_backend_hmac_init_sha512,
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.update_fn = mbedtls_backend_hmac_update_sha512,
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.finalize_fn = mbedtls_backend_hmac_finalize_sha512,
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.digest_size = NRF_CRYPTO_HASH_SIZE_SHA512,
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.context_size = sizeof(nrf_crypto_backend_hmac_sha512_context_t),
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.type = NRF_CRYPTO_HMAC_SHA512_TYPE
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};
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#endif // NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_MBEDTLS_HMAC_SHA512)
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#endif // NRF_MODULE_ENABLED(NRF_CRYPTO) && NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_MBEDTLS)
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