111 lines
4.0 KiB
C
111 lines
4.0 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_config.h"
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#include "nordic_common.h"
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#if NRF_MODULE_ENABLED(NRF_CRYPTO) && NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OPTIGA)
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#include <string.h>
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#include "nrf_crypto_ecc_shared.h"
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#include "nrf_crypto_ecdh_shared.h"
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#include "nrf_crypto_shared.h"
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#include "nrf_crypto_ecdh.h"
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#include "optiga_backend_ecc.h"
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/*lint -save -e????*/
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#include "optiga/optiga_crypt.h"
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/*lint -restore*/
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ret_code_t nrf_crypto_backend_optiga_ecdh_compute(
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void * p_context,
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void const * p_private_key,
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void const * p_public_key,
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uint8_t * p_shared_secret)
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{
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optiga_lib_status_t res = OPTIGA_LIB_ERROR;
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// Prepare public key
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nrf_crypto_backend_secp256r1_public_key_t * p_pub =
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(nrf_crypto_backend_secp256r1_public_key_t *) p_public_key;
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if (p_pub->oid != NRF_CRYPTO_INFINEON_PUBKEY_HOST_OID)
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{
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// OPTIGA requires the peer' public key to be host-supplied
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return NRF_ERROR_CRYPTO_INTERNAL;
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}
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// magic OID for pubkey from host
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public_key_from_host_t pub_key = {
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.public_key = p_pub->raw_pubkey,
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.length = 64+4, // public key + DER BITSTRING header
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.curve = OPTIGA_ECC_NIST_P_256
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};
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// Prepare private key
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nrf_crypto_backend_secp256r1_private_key_t * p_priv =
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(nrf_crypto_backend_secp256r1_private_key_t *) p_private_key;
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optiga_key_id_t priv_oid = p_priv->oid;
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if (priv_oid == NRF_CRYPTO_INFINEON_PRIVKEY_HOST_OID)
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{
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// OPTIGA Trust X can only compute ECDH with private key from inside OPTIGA
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return NRF_ERROR_CRYPTO_INTERNAL;
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}
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res = optiga_crypt_ecdh(
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priv_oid, // private key OID
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&pub_key, // peer public key details
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true, // true: export shared secret to host
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p_shared_secret // resulting shared secret
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);
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if (res != OPTIGA_LIB_SUCCESS)
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{
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// error in the optiga library
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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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#endif // NRF_MODULE_ENABLED(NRF_CRYPTO) && NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OPTIGA)
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