/* SPDX-License-Identifier: BSD-3-Clause */ /* $OpenBSD: siphash.h,v 1.5 2015/02/20 11:51:03 tedu Exp $ */ /*- * Copyright (c) 2013 Andre Oppermann <[email protected]> * 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 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. The name of the author may not be used to endorse or promote * products derived from this software without specific prior written * permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR 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. * * $FreeBSD$ */ /* * SipHash is a family of pseudorandom functions (a.k.a. keyed hash functions) * optimized for speed on short messages returning a 64bit hash/digest value. * * The number of rounds is defined during the initialization: * SipHash24_Init() for the fast and resonable strong version * SipHash48_Init() for the strong version (half as fast) * * struct SIPHASH_CTX ctx; * SipHash24_Init(&ctx); * SipHash_SetKey(&ctx, "16bytes long key"); * SipHash_Update(&ctx, pointer_to_string, length_of_string); * SipHash_Final(output, &ctx); */ #ifndef _SIPHASH_H_ #define _SIPHASH_H_ #include <linux/types.h> #define SIPHASH_BLOCK_LENGTH … #define SIPHASH_KEY_LENGTH … #define SIPHASH_DIGEST_LENGTH … SIPHASH_CTX; SIPHASH_KEY; void SipHash_Init(SIPHASH_CTX *, const SIPHASH_KEY *); void SipHash_Update(SIPHASH_CTX *, int, int, const void *, size_t); u64 SipHash_End(SIPHASH_CTX *, int, int); void SipHash_Final(void *, SIPHASH_CTX *, int, int); u64 SipHash(const SIPHASH_KEY *, int, int, const void *, size_t); #define SipHash24_Init(_c, _k) … #define SipHash24_Update(_c, _p, _l) … #define SipHash24_End(_d) … #define SipHash24_Final(_d, _c) … #define SipHash24(_k, _p, _l) … #define SipHash48_Init(_c, _k) … #define SipHash48_Update(_c, _p, _l) … #define SipHash48_End(_d) … #define SipHash48_Final(_d, _c) … #define SipHash48(_k, _p, _l) … #endif /* _SIPHASH_H_ */
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