diff options
| author | JP Aumasson <jpa@pm.me> | 2021-01-19 19:07:28 +0100 |
|---|---|---|
| committer | JP Aumasson <jpa@pm.me> | 2021-01-19 19:07:28 +0100 |
| commit | 7786f93448a4191d0413b7e160da420ba1792af1 (patch) | |
| tree | cd1b8210b737781ade345530b51cf9d27c38e9ee /siphash.c | |
| parent | header (diff) | |
| download | siphash-7786f93448a4191d0413b7e160da420ba1792af1.tar.gz siphash-7786f93448a4191d0413b7e160da420ba1792af1.tar.xz | |
fixes
Diffstat (limited to 'siphash.c')
| -rw-r--r-- | siphash.c | 61 |
1 files changed, 61 insertions, 0 deletions
@@ -14,7 +14,68 @@ this software. If not, see <http://creativecommons.org/publicdomain/zero/1.0/>. */ + #include "siphash.h" +#include <assert.h> +#include <stdint.h> +#include <stdio.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, |