202 lines
17 KiB
C
202 lines
17 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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#ifndef NRF_CRYPTO_ECDH_H__
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#define NRF_CRYPTO_ECDH_H__
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/** @addtogroup nrf_crypto
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* @{
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* @addtogroup nrf_crypto_ecdh Elliptic Curve Diffie-Hellman (ECDH)
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* @{
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* @brief Provides elliptic curve cryptography functions for Diffie-Hellman shared secret exchange.
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*
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* @addtogroup nrf_crypto_ecdh_secp160r1 Definitions specific to secp160r1 (NIST 160-bit)
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* @addtogroup nrf_crypto_ecdh_secp160r2 Definitions specific to secp160r2 (NIST 160-bit)
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* @addtogroup nrf_crypto_ecdh_secp192r1 Definitions specific to secp192r1 (NIST 192-bit)
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* @addtogroup nrf_crypto_ecdh_secp224r1 Definitions specific to secp224r1 (NIST 224-bit)
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* @addtogroup nrf_crypto_ecdh_secp256r1 Definitions specific to secp256r1 (NIST 256-bit)
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* @addtogroup nrf_crypto_ecdh_secp384r1 Definitions specific to secp384r1 (NIST 384-bit)
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* @addtogroup nrf_crypto_ecdh_secp521r1 Definitions specific to secp521r1 (NIST 521-bit)
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* @addtogroup nrf_crypto_ecdh_secp160k1 Definitions specific to secp160k1 (Koblitz 160-bit)
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* @addtogroup nrf_crypto_ecdh_secp192k1 Definitions specific to secp192k1 (Koblitz 192-bit)
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* @addtogroup nrf_crypto_ecdh_secp224k1 Definitions specific to secp224k1 (Koblitz 224-bit)
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* @addtogroup nrf_crypto_ecdh_secp256k1 Definitions specific to secp256k1 (Koblitz 256-bit)
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* @addtogroup nrf_crypto_ecdh_bp256r1 Definitions specific to bp256r1 (Brainpool 256-bit)
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* @addtogroup nrf_crypto_ecdh_bp384r1 Definitions specific to bp384r1 (Brainpool 384-bit)
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* @addtogroup nrf_crypto_ecdh_bp512r1 Definitions specific to bp512r1 (Brainpool 512-bit)
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* @addtogroup nrf_crypto_ecdh_curve25519 Definitions specific to Curve25519
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*/
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#include <stdint.h>
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#include <stddef.h>
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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_ecdh_shared.h"
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#include "nrf_crypto_ecdh_backend.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define NRF_CRYPTO_ECDH_SECP160R1_SHARED_SECRET_SIZE (160 / 8) /**< @brief Number of bytes in a shared secret using secp160r1 (NIST 160-bit). @ingroup nrf_crypto_ecdh_secp160r1 */
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#define NRF_CRYPTO_ECDH_SECP160R2_SHARED_SECRET_SIZE (160 / 8) /**< @brief Number of bytes in a shared secret using secp160r2 (NIST 160-bit). @ingroup nrf_crypto_ecdh_secp160r2 */
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#define NRF_CRYPTO_ECDH_SECP192R1_SHARED_SECRET_SIZE (192 / 8) /**< @brief Number of bytes in a shared secret using secp192r1 (NIST 192-bit). @ingroup nrf_crypto_ecdh_secp192r1 */
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#define NRF_CRYPTO_ECDH_SECP224R1_SHARED_SECRET_SIZE (224 / 8) /**< @brief Number of bytes in a shared secret using secp224r1 (NIST 224-bit). @ingroup nrf_crypto_ecdh_secp224r1 */
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#define NRF_CRYPTO_ECDH_SECP256R1_SHARED_SECRET_SIZE (256 / 8) /**< @brief Number of bytes in a shared secret using secp256r1 (NIST 256-bit). @ingroup nrf_crypto_ecdh_secp256r1 */
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#define NRF_CRYPTO_ECDH_SECP384R1_SHARED_SECRET_SIZE (384 / 8) /**< @brief Number of bytes in a shared secret using secp384r1 (NIST 384-bit). @ingroup nrf_crypto_ecdh_secp384r1 */
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#define NRF_CRYPTO_ECDH_SECP521R1_SHARED_SECRET_SIZE (528 / 8) /**< @brief Number of bytes in a shared secret using secp521r1 (NIST 521-bit). @ingroup nrf_crypto_ecdh_secp521r1 */
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#define NRF_CRYPTO_ECDH_SECP160K1_SHARED_SECRET_SIZE (160 / 8) /**< @brief Number of bytes in a shared secret using secp160k1 (Koblitz 160-bit). @ingroup nrf_crypto_ecdh_secp160k1 */
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#define NRF_CRYPTO_ECDH_SECP192K1_SHARED_SECRET_SIZE (192 / 8) /**< @brief Number of bytes in a shared secret using secp192k1 (Koblitz 192-bit). @ingroup nrf_crypto_ecdh_secp192k1 */
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#define NRF_CRYPTO_ECDH_SECP224K1_SHARED_SECRET_SIZE (224 / 8) /**< @brief Number of bytes in a shared secret using secp224k1 (Koblitz 224-bit). @ingroup nrf_crypto_ecdh_secp224k1 */
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#define NRF_CRYPTO_ECDH_SECP256K1_SHARED_SECRET_SIZE (256 / 8) /**< @brief Number of bytes in a shared secret using secp256k1 (Koblitz 256-bit). @ingroup nrf_crypto_ecdh_secp256k1 */
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#define NRF_CRYPTO_ECDH_BP256R1_SHARED_SECRET_SIZE (256 / 8) /**< @brief Number of bytes in a shared secret using bp256r1 (Brainpool 256-bit). @ingroup nrf_crypto_ecdh_bp256r1 */
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#define NRF_CRYPTO_ECDH_BP384R1_SHARED_SECRET_SIZE (384 / 8) /**< @brief Number of bytes in a shared secret using bp384r1 (Brainpool 384-bit). @ingroup nrf_crypto_ecdh_bp384r1 */
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#define NRF_CRYPTO_ECDH_BP512R1_SHARED_SECRET_SIZE (512 / 8) /**< @brief Number of bytes in a shared secret using bp512r1 (Brainpool 512-bit). @ingroup nrf_crypto_ecdh_bp512r1 */
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#define NRF_CRYPTO_ECDH_CURVE25519_SHARED_SECRET_SIZE (256 / 8) /**< @brief Number of bytes in a shared secret using Curve25519. @ingroup nrf_crypto_ecdh_curve25519 */
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#define NRF_CRYPTO_ECDH_SHARED_SECRET_MAX_SIZE NRF_CRYPTO_ECC_RAW_PRIVATE_KEY_MAX_SIZE /**< @brief Maximum size of a shared secret in bytes for all enabled curves. */
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typedef nrf_crypto_backend_secp160r1_ecdh_context_t nrf_crypto_ecdh_secp160r1_context_t; /**< @brief Context used to store temporary data during computing ECDH for curve secp160r1 (NIST 160-bit). @ingroup nrf_crypto_ecdh_secp160r1 */
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typedef nrf_crypto_backend_secp160r2_ecdh_context_t nrf_crypto_ecdh_secp160r2_context_t; /**< @brief Context used to store temporary data during computing ECDH for curve secp160r2 (NIST 160-bit). @ingroup nrf_crypto_ecdh_secp160r2 */
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typedef nrf_crypto_backend_secp192r1_ecdh_context_t nrf_crypto_ecdh_secp192r1_context_t; /**< @brief Context used to store temporary data during computing ECDH for curve secp192r1 (NIST 192-bit). @ingroup nrf_crypto_ecdh_secp192r1 */
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typedef nrf_crypto_backend_secp224r1_ecdh_context_t nrf_crypto_ecdh_secp224r1_context_t; /**< @brief Context used to store temporary data during computing ECDH for curve secp224r1 (NIST 224-bit). @ingroup nrf_crypto_ecdh_secp224r1 */
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typedef nrf_crypto_backend_secp256r1_ecdh_context_t nrf_crypto_ecdh_secp256r1_context_t; /**< @brief Context used to store temporary data during computing ECDH for curve secp256r1 (NIST 256-bit). @ingroup nrf_crypto_ecdh_secp256r1 */
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typedef nrf_crypto_backend_secp384r1_ecdh_context_t nrf_crypto_ecdh_secp384r1_context_t; /**< @brief Context used to store temporary data during computing ECDH for curve secp384r1 (NIST 384-bit). @ingroup nrf_crypto_ecdh_secp384r1 */
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typedef nrf_crypto_backend_secp521r1_ecdh_context_t nrf_crypto_ecdh_secp521r1_context_t; /**< @brief Context used to store temporary data during computing ECDH for curve secp521r1 (NIST 521-bit). @ingroup nrf_crypto_ecdh_secp521r1 */
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typedef nrf_crypto_backend_secp160k1_ecdh_context_t nrf_crypto_ecdh_secp160k1_context_t; /**< @brief Context used to store temporary data during computing ECDH for curve secp160k1 (Koblitz 160-bit). @ingroup nrf_crypto_ecdh_secp160k1 */
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typedef nrf_crypto_backend_secp192k1_ecdh_context_t nrf_crypto_ecdh_secp192k1_context_t; /**< @brief Context used to store temporary data during computing ECDH for curve secp192k1 (Koblitz 192-bit). @ingroup nrf_crypto_ecdh_secp192k1 */
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typedef nrf_crypto_backend_secp224k1_ecdh_context_t nrf_crypto_ecdh_secp224k1_context_t; /**< @brief Context used to store temporary data during computing ECDH for curve secp224k1 (Koblitz 224-bit). @ingroup nrf_crypto_ecdh_secp224k1 */
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typedef nrf_crypto_backend_secp256k1_ecdh_context_t nrf_crypto_ecdh_secp256k1_context_t; /**< @brief Context used to store temporary data during computing ECDH for curve secp256k1 (Koblitz 256-bit). @ingroup nrf_crypto_ecdh_secp256k1 */
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typedef nrf_crypto_backend_bp256r1_ecdh_context_t nrf_crypto_ecdh_bp256r1_context_t; /**< @brief Context used to store temporary data during computing ECDH for curve bp256r1 (Brainpool 256-bit). @ingroup nrf_crypto_ecdh_bp256r1 */
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typedef nrf_crypto_backend_bp384r1_ecdh_context_t nrf_crypto_ecdh_bp384r1_context_t; /**< @brief Context used to store temporary data during computing ECDH for curve bp384r1 (Brainpool 384-bit). @ingroup nrf_crypto_ecdh_bp384r1 */
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typedef nrf_crypto_backend_bp512r1_ecdh_context_t nrf_crypto_ecdh_bp512r1_context_t; /**< @brief Context used to store temporary data during computing ECDH for curve bp512r1 (Brainpool 512-bit). @ingroup nrf_crypto_ecdh_bp512r1 */
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typedef nrf_crypto_backend_curve25519_ecdh_context_t nrf_crypto_ecdh_curve25519_context_t; /**< @brief Context used to store temporary data during computing ECDH for curve Curve25519. @ingroup nrf_crypto_ecdh_curve25519 */
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typedef uint8_t nrf_crypto_ecdh_secp160r1_shared_secret_t
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[NRF_CRYPTO_ECDH_SECP160R1_SHARED_SECRET_SIZE]; /**< @brief Array type of a shared secret for curve secp160r1 (NIST 160-bit). @ingroup nrf_crypto_ecdh_secp160r1 */
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typedef uint8_t nrf_crypto_ecdh_secp160r2_shared_secret_t
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[NRF_CRYPTO_ECDH_SECP160R2_SHARED_SECRET_SIZE]; /**< @brief Array type of a shared secret for curve secp160r2 (NIST 160-bit). @ingroup nrf_crypto_ecdh_secp160r2 */
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typedef uint8_t nrf_crypto_ecdh_secp192r1_shared_secret_t
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[NRF_CRYPTO_ECDH_SECP192R1_SHARED_SECRET_SIZE]; /**< @brief Array type of a shared secret for curve secp192r1 (NIST 192-bit). @ingroup nrf_crypto_ecdh_secp192r1 */
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typedef uint8_t nrf_crypto_ecdh_secp224r1_shared_secret_t
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[NRF_CRYPTO_ECDH_SECP224R1_SHARED_SECRET_SIZE]; /**< @brief Array type of a shared secret for curve secp224r1 (NIST 224-bit). @ingroup nrf_crypto_ecdh_secp224r1 */
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typedef uint8_t nrf_crypto_ecdh_secp256r1_shared_secret_t
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[NRF_CRYPTO_ECDH_SECP256R1_SHARED_SECRET_SIZE]; /**< @brief Array type of a shared secret for curve secp256r1 (NIST 256-bit). @ingroup nrf_crypto_ecdh_secp256r1 */
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typedef uint8_t nrf_crypto_ecdh_secp384r1_shared_secret_t
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[NRF_CRYPTO_ECDH_SECP384R1_SHARED_SECRET_SIZE]; /**< @brief Array type of a shared secret for curve secp384r1 (NIST 384-bit). @ingroup nrf_crypto_ecdh_secp384r1 */
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typedef uint8_t nrf_crypto_ecdh_secp521r1_shared_secret_t
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[NRF_CRYPTO_ECDH_SECP521R1_SHARED_SECRET_SIZE]; /**< @brief Array type of a shared secret for curve secp521r1 (NIST 521-bit). @ingroup nrf_crypto_ecdh_secp521r1 */
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typedef uint8_t nrf_crypto_ecdh_secp160k1_shared_secret_t
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[NRF_CRYPTO_ECDH_SECP160K1_SHARED_SECRET_SIZE]; /**< @brief Array type of a shared secret for curve secp160k1 (Koblitz 160-bit). @ingroup nrf_crypto_ecdh_secp160k1 */
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typedef uint8_t nrf_crypto_ecdh_secp192k1_shared_secret_t
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[NRF_CRYPTO_ECDH_SECP192K1_SHARED_SECRET_SIZE]; /**< @brief Array type of a shared secret for curve secp192k1 (Koblitz 192-bit). @ingroup nrf_crypto_ecdh_secp192k1 */
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typedef uint8_t nrf_crypto_ecdh_secp224k1_shared_secret_t
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[NRF_CRYPTO_ECDH_SECP224K1_SHARED_SECRET_SIZE]; /**< @brief Array type of a shared secret for curve secp224k1 (Koblitz 224-bit). @ingroup nrf_crypto_ecdh_secp224k1 */
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typedef uint8_t nrf_crypto_ecdh_secp256k1_shared_secret_t
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[NRF_CRYPTO_ECDH_SECP256K1_SHARED_SECRET_SIZE]; /**< @brief Array type of a shared secret for curve secp256k1 (Koblitz 256-bit). @ingroup nrf_crypto_ecdh_secp256k1 */
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typedef uint8_t nrf_crypto_ecdh_bp256r1_shared_secret_t
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[NRF_CRYPTO_ECDH_BP256R1_SHARED_SECRET_SIZE]; /**< @brief Array type of a shared secret for curve bp256r1 (Brainpool 256-bit). @ingroup nrf_crypto_ecdh_bp256r1 */
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typedef uint8_t nrf_crypto_ecdh_bp384r1_shared_secret_t
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[NRF_CRYPTO_ECDH_BP384R1_SHARED_SECRET_SIZE]; /**< @brief Array type of a shared secret for curve bp384r1 (Brainpool 384-bit). @ingroup nrf_crypto_ecdh_bp384r1 */
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typedef uint8_t nrf_crypto_ecdh_bp512r1_shared_secret_t
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[NRF_CRYPTO_ECDH_BP512R1_SHARED_SECRET_SIZE]; /**< @brief Array type of a shared secret for curve bp512r1 (Brainpool 512-bit). @ingroup nrf_crypto_ecdh_bp512r1 */
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typedef uint8_t nrf_crypto_ecdh_curve25519_shared_secret_t
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[NRF_CRYPTO_ECDH_CURVE25519_SHARED_SECRET_SIZE]; /**< @brief Array type of a shared secret for curve Curve25519. @ingroup nrf_crypto_ecdh_curve25519 */
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typedef uint8_t nrf_crypto_ecdh_shared_secret_t
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[NRF_CRYPTO_ECDH_SHARED_SECRET_MAX_SIZE]; /**< @brief Array type of a shared secret for any of the enabled curves. */
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/** @brief Union holding a context for ECDH computation.
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*/
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typedef union
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{
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nrf_crypto_ecdh_secp160r1_context_t context_secp160r1; /**< @brief Occupies space for secp160r1 (NIST 160-bit). */
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nrf_crypto_ecdh_secp160r2_context_t context_secp160r2; /**< @brief Occupies space for secp160r2 (NIST 160-bit). */
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nrf_crypto_ecdh_secp192r1_context_t context_secp192r1; /**< @brief Occupies space for secp192r1 (NIST 192-bit). */
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nrf_crypto_ecdh_secp224r1_context_t context_secp224r1; /**< @brief Occupies space for secp224r1 (NIST 224-bit). */
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nrf_crypto_ecdh_secp256r1_context_t context_secp256r1; /**< @brief Occupies space for secp256r1 (NIST 256-bit). */
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nrf_crypto_ecdh_secp384r1_context_t context_secp384r1; /**< @brief Occupies space for secp384r1 (NIST 384-bit). */
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nrf_crypto_ecdh_secp521r1_context_t context_secp521r1; /**< @brief Occupies space for secp521r1 (NIST 521-bit). */
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nrf_crypto_ecdh_secp160k1_context_t context_secp160k1; /**< @brief Occupies space for secp160k1 (Koblitz 160-bit). */
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nrf_crypto_ecdh_secp192k1_context_t context_secp192k1; /**< @brief Occupies space for secp192k1 (Koblitz 192-bit). */
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nrf_crypto_ecdh_secp224k1_context_t context_secp224k1; /**< @brief Occupies space for secp224k1 (Koblitz 224-bit). */
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nrf_crypto_ecdh_secp256k1_context_t context_secp256k1; /**< @brief Occupies space for secp256k1 (Koblitz 256-bit). */
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nrf_crypto_ecdh_bp256r1_context_t context_bp256r1; /**< @brief Occupies space for bp256r1 (Brainpool 256-bit). */
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nrf_crypto_ecdh_bp384r1_context_t context_bp384r1; /**< @brief Occupies space for bp384r1 (Brainpool 384-bit). */
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nrf_crypto_ecdh_bp512r1_context_t context_bp512r1; /**< @brief Occupies space for bp512r1 (Brainpool 512-bit). */
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nrf_crypto_ecdh_curve25519_context_t context_curve25519; /**< @brief Occupies space for Curve25519. */
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} nrf_crypto_ecdh_context_t;
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/** @brief Computes shared secret using ECC Diffie-Hellman.
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*
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* @param[in] p_context Pointer to temporary structure holding context information.
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* If it is NULL, necessary data will be allocated with
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* @ref NRF_CRYPTO_ALLOC and freed at the end of the function.
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* @param[in] p_private_key Pointer to structure holding a private key.
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* @param[in] p_public_key Pointer to structure holding a public key received from the other party.
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* @param[out] p_shared_secret Pointer to buffer where shared secret will be put.
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* @param[in,out] p_shared_secret_size Maximum number of bytes that @p p_shared_secret buffer can hold on input
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* and the actual number of bytes used by the data on output.
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* Actual size for selected curve is defined by
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* the preprocessor definitions, e.g.
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* @ref NRF_CRYPTO_ECDH_SECP256R1_SHARED_SECRET_SIZE.
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*/
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ret_code_t nrf_crypto_ecdh_compute(
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nrf_crypto_ecdh_context_t * p_context,
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nrf_crypto_ecc_private_key_t const * p_private_key,
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nrf_crypto_ecc_public_key_t const * p_public_key,
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uint8_t * p_shared_secret,
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size_t * p_shared_secret_size);
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#ifdef __cplusplus
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}
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#endif
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/** @}
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* @}
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*/
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#endif // NRF_CRYPTO_ECDH_H__
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