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131 lines
5.4 KiB
131 lines
5.4 KiB
/* ecc_dh.h - TinyCrypt interface to EC-DH implementation */ |
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/* |
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* Copyright (c) 2014, Kenneth MacKay |
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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 |
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* modification, are permitted provided that the following conditions are met: |
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* |
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* * 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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* * Redistributions in binary form must reproduce the above copyright notice, |
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* this list of conditions and the following disclaimer in the documentation |
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* and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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 |
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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/* Copyright (C) 2017 by Intel Corporation, All Rights Reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: |
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* |
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* - Redistributions of source code must retain the above copyright notice, |
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* this list of conditions and the following disclaimer. |
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* |
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* - Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* - Neither the name of Intel Corporation nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER 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 |
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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/** |
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* @file |
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* @brief -- Interface to EC-DH implementation. |
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* |
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* Overview: This software is an implementation of EC-DH. This implementation |
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* uses curve NIST p-256. |
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* |
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* Security: The curve NIST p-256 provides approximately 128 bits of security. |
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*/ |
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#ifndef __TC_ECC_DH_H__ |
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#define __TC_ECC_DH_H__ |
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#include <tinycrypt/ecc.h> |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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/** |
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* @brief Create a public/private key pair. |
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* @return returns TC_CRYPTO_SUCCESS (1) if the key pair was generated successfully |
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* returns TC_CRYPTO_FAIL (0) if error while generating key pair |
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* |
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* @param p_public_key OUT -- Will be filled in with the public key. Must be at |
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* least 2 * the curve size (in bytes) long. For curve secp256r1, p_public_key |
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* must be 64 bytes long. |
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* @param p_private_key OUT -- Will be filled in with the private key. Must be as |
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* long as the curve order (for secp256r1, p_private_key must be 32 bytes long). |
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* |
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* @note side-channel countermeasure: algorithm strengthened against timing |
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* attack. |
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* @warning A cryptographically-secure PRNG function must be set (using |
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* uECC_set_rng()) before calling uECC_make_key(). |
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*/ |
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int uECC_make_key(uint8_t *p_public_key, uint8_t *p_private_key, uECC_Curve curve); |
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#ifdef ENABLE_TESTS |
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/** |
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* @brief Create a public/private key pair given a specific d. |
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* |
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* @note THIS FUNCTION SHOULD BE CALLED ONLY FOR TEST PURPOSES. Refer to |
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* uECC_make_key() function for real applications. |
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*/ |
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int uECC_make_key_with_d(uint8_t *p_public_key, uint8_t *p_private_key, |
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unsigned int *d, uECC_Curve curve); |
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#endif |
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/** |
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* @brief Compute a shared secret given your secret key and someone else's |
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* public key. |
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* @return returns TC_CRYPTO_SUCCESS (1) if the shared secret was computed successfully |
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* returns TC_CRYPTO_FAIL (0) otherwise |
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* |
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* @param p_secret OUT -- Will be filled in with the shared secret value. Must be |
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* the same size as the curve size (for curve secp256r1, secret must be 32 bytes |
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* long. |
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* @param p_public_key IN -- The public key of the remote party. |
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* @param p_private_key IN -- Your private key. |
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* |
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* @warning It is recommended to use the output of uECC_shared_secret() as the |
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* input of a recommended Key Derivation Function (see NIST SP 800-108) in |
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* order to produce a cryptographically secure symmetric key. |
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*/ |
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int uECC_shared_secret(const uint8_t *p_public_key, const uint8_t *p_private_key, |
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uint8_t *p_secret, uECC_Curve curve); |
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#ifdef __cplusplus |
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} |
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#endif |
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#endif /* __TC_ECC_DH_H__ */
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