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4d846d260e
The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch up to that fact and revert to their recommended match of BSD-2-Clause. Discussed with: pfg MFC After: 3 days Sponsored by: Netflix
59 lines
2.1 KiB
C
59 lines
2.1 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2021 The FreeBSD Foundation
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*
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* This software was developed by Ararat River Consulting, LLC under
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* sponsorship from the FreeBSD Foundation.
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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
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. 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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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* 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 AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* 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
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef __CRYPTO_CURVE25519_H__
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#define __CRYPTO_CURVE25519_H__
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#include <sys/libkern.h>
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#define CURVE25519_KEY_SIZE 32
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bool curve25519(uint8_t *public, const uint8_t *secret,
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const uint8_t *basepoint);
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bool curve25519_generate_public(uint8_t *public,
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const uint8_t *secret);
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static __inline void
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curve25519_clamp_secret(uint8_t *secret)
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{
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secret[0] &= 248;
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secret[31] &= 127;
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secret[31] |= 64;
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}
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static __inline void
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curve25519_generate_secret(uint8_t *secret)
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{
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arc4random_buf(secret, CURVE25519_KEY_SIZE);
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curve25519_clamp_secret(secret);
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}
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#endif /* __CRYPTO_CURVE25519_H__ */
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