diff options
Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/crypto/backend/micro_ecc/micro_ecc_backend_ecdsa.c')
-rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/crypto/backend/micro_ecc/micro_ecc_backend_ecdsa.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/crypto/backend/micro_ecc/micro_ecc_backend_ecdsa.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/crypto/backend/micro_ecc/micro_ecc_backend_ecdsa.c new file mode 100644 index 0000000..f72e6dc --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/crypto/backend/micro_ecc/micro_ecc_backend_ecdsa.c @@ -0,0 +1,166 @@ +/** + * 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_config.h" +#include "nordic_common.h" + +#if NRF_MODULE_ENABLED(NRF_CRYPTO) && NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_MICRO_ECC) + +#include <stdint.h> +#include <stdbool.h> +#include <string.h> + +#include "nrf_crypto_ecc.h" +#include "nrf_crypto_ecdsa.h" +#include "nrf_crypto_shared.h" +#include "nrf_crypto_mem.h" +#include "micro_ecc_backend_ecc.h" +#include "micro_ecc_backend_shared.h" +#include "uECC.h" + + +ret_code_t nrf_crypto_backend_micro_ecc_sign( + void * p_context, + void const * p_private_key, + uint8_t const * p_data, + size_t data_size, + uint8_t * p_signature) +{ + int result; + + nrf_crypto_backend_micro_ecc_common_key_t const * p_prv = + (nrf_crypto_backend_micro_ecc_common_key_t const *)p_private_key; + + uECC_Curve p_micro_ecc_curve = nrf_crypto_backend_micro_ecc_curve_get(p_prv); + +#if ECC_BACKEND_SWAP_BYTES + + nrf_crypto_ecc_curve_info_t const * p_info = p_prv->header.p_info; + + size_t hash_size = MIN(data_size, p_info->raw_private_key_size); + uint8_t hash_le[NRF_CRYPTO_ECC_RAW_PRIVATE_KEY_MAX_SIZE]; + + nrf_crypto_internal_swap_endian(hash_le, p_data, hash_size); + + uECC_set_rng(nrf_crypto_backend_micro_ecc_rng_callback); + + result = uECC_sign((uint8_t const *)(&p_prv->key[0]), + hash_le, + hash_size, + p_signature, + p_micro_ecc_curve); + + nrf_crypto_internal_double_swap_endian_in_place(p_signature, p_info->raw_private_key_size); + +#else + + uECC_set_rng(nrf_crypto_backend_micro_ecc_rng_callback); + + result = uECC_sign((uint8_t const *)(&p_prv->key[0]), + p_data, + data_size, + p_signature, + p_micro_ecc_curve); + +#endif + + if (result == 0) + { + return NRF_ERROR_CRYPTO_INTERNAL; + } + return NRF_SUCCESS; +} + + +ret_code_t nrf_crypto_backend_micro_ecc_verify( + void * p_context, + void const * p_public_key, + uint8_t const * p_data, + size_t data_size, + uint8_t const * p_signature) +{ + int result; + + nrf_crypto_backend_micro_ecc_common_key_t const * p_pub = + (nrf_crypto_backend_micro_ecc_common_key_t const *)p_public_key; + + uECC_Curve p_micro_ecc_curve = nrf_crypto_backend_micro_ecc_curve_get(p_pub); + +#if ECC_BACKEND_SWAP_BYTES + + nrf_crypto_ecc_curve_info_t const * p_info = p_pub->header.p_info; + + size_t hash_size = MIN(data_size, p_info->raw_private_key_size); + uint8_t hash_le [NRF_CRYPTO_ECC_RAW_PRIVATE_KEY_MAX_SIZE]; + uint8_t signature_le[NRF_CRYPTO_ECDSA_SIGNATURE_MAX_SIZE]; + + nrf_crypto_internal_swap_endian(hash_le, p_data, hash_size); + + nrf_crypto_internal_double_swap_endian(signature_le, + p_signature, + p_info->raw_private_key_size); + + result = uECC_verify((uint8_t const *)(&p_pub->key[0]), + hash_le, + hash_size, + signature_le, + p_micro_ecc_curve); + +#else + + result = uECC_verify((uint8_t const *)(&p_pub->key[0]), + p_data, + data_size, + p_signature, + p_micro_ecc_curve); + +#endif + + if (result == 0) + { + return NRF_ERROR_CRYPTO_ECDSA_INVALID_SIGNATURE; + } + + return NRF_SUCCESS; +} + + +#endif // NRF_MODULE_ENABLED(NRF_CRYPTO) && NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_MICRO_ECC) + |