diff options
Diffstat (limited to 'freebsd/sys/crypto/siphash/siphash.h')
| -rw-r--r-- | freebsd/sys/crypto/siphash/siphash.h | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/freebsd/sys/crypto/siphash/siphash.h b/freebsd/sys/crypto/siphash/siphash.h new file mode 100644 index 00000000..8bbda4f3 --- /dev/null +++ b/freebsd/sys/crypto/siphash/siphash.h @@ -0,0 +1,83 @@ +/*- + * Copyright (c) 2013 Andre Oppermann <andre@FreeBSD.org> + * 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_ + +#define SIPHASH_BLOCK_LENGTH 8 +#define SIPHASH_KEY_LENGTH 16 +#define SIPHASH_DIGEST_LENGTH 8 + +typedef struct _SIPHASH_CTX { + uint64_t v[4]; + union { + uint64_t b64; + uint8_t b8[8]; + } buf; + uint64_t bytes; + uint8_t buflen; + uint8_t rounds_compr; + uint8_t rounds_final; + uint8_t initialized; +} SIPHASH_CTX; + + +#define SipHash24_Init(x) SipHash_InitX((x), 2, 4) +#define SipHash48_Init(x) SipHash_InitX((x), 4, 8) +void SipHash_InitX(SIPHASH_CTX *, int, int); +void SipHash_SetKey(SIPHASH_CTX *, const uint8_t[static SIPHASH_KEY_LENGTH]); +void SipHash_Update(SIPHASH_CTX *, const void *, size_t); +void SipHash_Final(uint8_t[static SIPHASH_DIGEST_LENGTH], SIPHASH_CTX *); +uint64_t SipHash_End(SIPHASH_CTX *); + +#define SipHash24(x, y, z, i) SipHashX((x), 2, 4, (y), (z), (i)); +#define SipHash48(x, y, z, i) SipHashX((x), 4, 8, (y), (z), (i)); +uint64_t SipHashX(SIPHASH_CTX *, int, int, const uint8_t[static SIPHASH_KEY_LENGTH], const void *, + size_t); + +int SipHash24_TestVectors(void); + +#endif /* _SIPHASH_H_ */ |