163 lines
6.8 KiB
C
163 lines
6.8 KiB
C
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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 "nrf_crypto_error.h"
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#include "nrf_crypto_ecc.h"
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#include "nrf_crypto_eddsa.h"
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#include "nrf_crypto_mem.h"
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#include "app_util.h"
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#include "sdk_macros.h"
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#if NRF_CRYPTO_ECC_ENABLED && NRF_CRYPTO_ECC_ED25519_ENABLED
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ret_code_t nrf_crypto_eddsa_sign(nrf_crypto_eddsa_sign_context_t * p_context,
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nrf_crypto_ecc_private_key_t const * p_private_key,
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uint8_t const * p_message,
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size_t message_size,
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uint8_t * p_signature,
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size_t * p_signature_size)
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{
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ret_code_t result = NRF_SUCCESS;
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void * p_allocated_context = NULL;
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// Get pointer to header
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nrf_crypto_internal_ecc_key_header_t const * p_private_key_header =
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(nrf_crypto_internal_ecc_key_header_t const *)p_private_key;
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// Verify parameters (zero-length message is valid per RFC 8032)
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if (message_size > 0)
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{
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VERIFY_TRUE(p_message != NULL, NRF_ERROR_CRYPTO_INPUT_NULL);
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}
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result = nrf_crypto_internal_ecc_key_input_check(
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p_private_key_header,
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NRF_CRYPTO_INTERNAL_ECC_PRIVATE_KEY_INIT_VALUE);
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VERIFY_SUCCESS(result);
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result = nrf_crypto_internal_ecc_raw_output_prepare(p_signature,
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p_signature_size,
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NRF_CRYPTO_EDDSA_ED25519_SIGNATURE_SIZE);
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VERIFY_SUCCESS(result);
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// Allocate context if not provided
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if (p_context == NULL && NRF_CRYPTO_BACKEND_ED25519_SIGN_CONTEXT_SIZE > 0)
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{
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p_allocated_context = NRF_CRYPTO_ALLOC(NRF_CRYPTO_BACKEND_ED25519_SIGN_CONTEXT_SIZE);
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VERIFY_TRUE(p_allocated_context != NULL, NRF_ERROR_CRYPTO_ALLOC_FAILED);
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p_context = p_allocated_context;
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}
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// Execute backend implementation
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result = nrf_crypto_backend_ed25519_sign(p_context,
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p_private_key,
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p_message,
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message_size,
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p_signature);
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// Deallocate context if allocated
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if (p_allocated_context != NULL)
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{
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NRF_CRYPTO_FREE(p_allocated_context);
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}
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return result;
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}
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ret_code_t nrf_crypto_eddsa_verify(nrf_crypto_eddsa_verify_context_t * p_context,
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nrf_crypto_ecc_public_key_t const * p_public_key,
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uint8_t const * p_message,
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size_t message_size,
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uint8_t const * p_signature,
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size_t signature_size)
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{
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ret_code_t result = NRF_SUCCESS;
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void * p_allocated_context = NULL;
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// Get pointer to header
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nrf_crypto_internal_ecc_key_header_t const * p_public_key_header =
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(nrf_crypto_internal_ecc_key_header_t const *)p_public_key;
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// Verify parameters (zero-length message is valid per RFC 8032)
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if (message_size > 0)
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{
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VERIFY_TRUE(p_message != NULL, NRF_ERROR_CRYPTO_INPUT_NULL);
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}
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result = nrf_crypto_internal_ecc_key_input_check(
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p_public_key_header,
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NRF_CRYPTO_INTERNAL_ECC_PUBLIC_KEY_INIT_VALUE);
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VERIFY_SUCCESS(result);
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result = nrf_crypto_internal_ecc_raw_input_check(p_signature,
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signature_size,
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NRF_CRYPTO_EDDSA_ED25519_SIGNATURE_SIZE);
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VERIFY_SUCCESS(result);
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// Allocate context if not provided
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if (p_context == NULL && NRF_CRYPTO_BACKEND_ED25519_VERIFY_CONTEXT_SIZE > 0)
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{
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p_allocated_context = NRF_CRYPTO_ALLOC(NRF_CRYPTO_BACKEND_ED25519_VERIFY_CONTEXT_SIZE);
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VERIFY_TRUE(p_allocated_context != NULL, NRF_ERROR_CRYPTO_ALLOC_FAILED);
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p_context = p_allocated_context;
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}
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// Execute backend implementation
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result = nrf_crypto_backend_ed25519_verify(p_context,
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p_public_key,
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p_message,
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message_size,
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p_signature);
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// Deallocate context if allocated
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if (p_allocated_context != NULL)
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{
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NRF_CRYPTO_FREE(p_allocated_context);
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}
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return result;
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}
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#endif // NRF_CRYPTO_ECC_ENABLED && NRF_CRYPTO_ECC_ED25519_ENABLED
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