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| author | JP Aumasson <jpa@pm.me> | 2021-01-19 18:52:52 +0100 |
|---|---|---|
| committer | JP Aumasson <jpa@pm.me> | 2021-01-19 18:52:52 +0100 |
| commit | 030cb8c42ca081ba2e0d5386ec6a2b08b264e991 (patch) | |
| tree | 2f6fa8a895da69d6a6dd42918dec84a63d7294f3 /siphash.h | |
| parent | Merge pull request #30 from veorq/notahash (diff) | |
| download | siphash-030cb8c42ca081ba2e0d5386ec6a2b08b264e991.tar.gz siphash-030cb8c42ca081ba2e0d5386ec6a2b08b264e991.tar.xz | |
header
Diffstat (limited to 'siphash.h')
| -rw-r--r-- | siphash.h | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/siphash.h b/siphash.h new file mode 100644 index 0000000..82feae0 --- /dev/null +++ b/siphash.h @@ -0,0 +1,80 @@ +/* + SipHash reference C implementation + + Copyright (c) 2012-2021 Jean-Philippe Aumasson + <jeanphilippe.aumasson@gmail.com> + Copyright (c) 2012-2014 Daniel J. Bernstein <djb@cr.yp.to> + + To the extent possible under law, the author(s) have dedicated all copyright + and related and neighboring rights to this software to the public domain + worldwide. This software is distributed without any warranty. + + You should have received a copy of the CC0 Public Domain Dedication along + with + this software. If not, see + <http://creativecommons.org/publicdomain/zero/1.0/>. + */ +#include <assert.h> +#include <inttypes.h> +#include <stdint.h> +#include <stdio.h> +#include <string.h> + +/* default: SipHash-2-4 */ +#ifndef cROUNDS + #define cROUNDS 2 +#endif +#ifndef dROUNDS + #define dROUNDS 4 +#endif + +#define ROTL(x, b) (uint64_t)(((x) << (b)) | ((x) >> (64 - (b)))) + +#define U32TO8_LE(p, v) \ + (p)[0] = (uint8_t)((v)); \ + (p)[1] = (uint8_t)((v) >> 8); \ + (p)[2] = (uint8_t)((v) >> 16); \ + (p)[3] = (uint8_t)((v) >> 24); + +#define U64TO8_LE(p, v) \ + U32TO8_LE((p), (uint32_t)((v))); \ + U32TO8_LE((p) + 4, (uint32_t)((v) >> 32)); + +#define U8TO64_LE(p) \ + (((uint64_t)((p)[0])) | ((uint64_t)((p)[1]) << 8) | \ + ((uint64_t)((p)[2]) << 16) | ((uint64_t)((p)[3]) << 24) | \ + ((uint64_t)((p)[4]) << 32) | ((uint64_t)((p)[5]) << 40) | \ + ((uint64_t)((p)[6]) << 48) | ((uint64_t)((p)[7]) << 56)) + +#define SIPROUND \ + do { \ + v0 += v1; \ + v1 = ROTL(v1, 13); \ + v1 ^= v0; \ + v0 = ROTL(v0, 32); \ + v2 += v3; \ + v3 = ROTL(v3, 16); \ + v3 ^= v2; \ + v0 += v3; \ + v3 = ROTL(v3, 21); \ + v3 ^= v0; \ + v2 += v1; \ + v1 = ROTL(v1, 17); \ + v1 ^= v2; \ + v2 = ROTL(v2, 32); \ + } while (0) + +#ifdef DEBUG +#define TRACE \ + do { \ + printf("(%3zu) v0 %016"PRIx64"\n", inlen, v0); \ + printf("(%3zu) v1 %016"PRIx64"\n", inlen, v1); \ + printf("(%3zu) v2 %016"PRIx64"\n", inlen, v2); \ + printf("(%3zu) v3 %016"PRIx64"\n", inlen, v3); \ + } while (0) +#else +#define TRACE +#endif + +int siphash(const uint8_t *in, const size_t inlen, const uint8_t *k, + uint8_t *out, const size_t outlen); |