summaryrefslogtreecommitdiff
path: root/src/basic/siphash24.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/basic/siphash24.c')
-rw-r--r--src/basic/siphash24.c193
1 files changed, 0 insertions, 193 deletions
diff --git a/src/basic/siphash24.c b/src/basic/siphash24.c
deleted file mode 100644
index 8c1cdc3db6..0000000000
--- a/src/basic/siphash24.c
+++ /dev/null
@@ -1,193 +0,0 @@
-/*
- SipHash reference C implementation
-
- Written in 2012 by
- Jean-Philippe Aumasson <jeanphilippe.aumasson@gmail.com>
- 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/>.
-
- (Minimal changes made by Lennart Poettering, to make clean for inclusion in systemd)
- (Refactored by Tom Gundersen to split up in several functions and follow systemd
- coding style)
-*/
-
-#include <stdio.h>
-
-#include "macro.h"
-#include "siphash24.h"
-#include "unaligned.h"
-
-static inline uint64_t rotate_left(uint64_t x, uint8_t b) {
- assert(b < 64);
-
- return (x << b) | (x >> (64 - b));
-}
-
-static inline void sipround(struct siphash *state) {
- assert(state);
-
- state->v0 += state->v1;
- state->v1 = rotate_left(state->v1, 13);
- state->v1 ^= state->v0;
- state->v0 = rotate_left(state->v0, 32);
- state->v2 += state->v3;
- state->v3 = rotate_left(state->v3, 16);
- state->v3 ^= state->v2;
- state->v0 += state->v3;
- state->v3 = rotate_left(state->v3, 21);
- state->v3 ^= state->v0;
- state->v2 += state->v1;
- state->v1 = rotate_left(state->v1, 17);
- state->v1 ^= state->v2;
- state->v2 = rotate_left(state->v2, 32);
-}
-
-void siphash24_init(struct siphash *state, const uint8_t k[16]) {
- uint64_t k0, k1;
-
- assert(state);
- assert(k);
-
- k0 = unaligned_read_le64(k);
- k1 = unaligned_read_le64(k + 8);
-
- *state = (struct siphash) {
- /* "somepseudorandomlygeneratedbytes" */
- .v0 = 0x736f6d6570736575ULL ^ k0,
- .v1 = 0x646f72616e646f6dULL ^ k1,
- .v2 = 0x6c7967656e657261ULL ^ k0,
- .v3 = 0x7465646279746573ULL ^ k1,
- .padding = 0,
- .inlen = 0,
- };
-}
-
-void siphash24_compress(const void *_in, size_t inlen, struct siphash *state) {
-
- const uint8_t *in = _in;
- const uint8_t *end = in + inlen;
- size_t left = state->inlen & 7;
- uint64_t m;
-
- assert(in);
- assert(state);
-
- /* Update total length */
- state->inlen += inlen;
-
- /* If padding exists, fill it out */
- if (left > 0) {
- for ( ; in < end && left < 8; in ++, left ++)
- state->padding |= ((uint64_t) *in) << (left * 8);
-
- if (in == end && left < 8)
- /* We did not have enough input to fill out the padding completely */
- return;
-
-#ifdef DEBUG
- printf("(%3zu) v0 %08x %08x\n", state->inlen, (uint32_t) (state->v0 >> 32), (uint32_t) state->v0);
- printf("(%3zu) v1 %08x %08x\n", state->inlen, (uint32_t) (state->v1 >> 32), (uint32_t) state->v1);
- printf("(%3zu) v2 %08x %08x\n", state->inlen, (uint32_t) (state->v2 >> 32), (uint32_t) state->v2);
- printf("(%3zu) v3 %08x %08x\n", state->inlen, (uint32_t) (state->v3 >> 32), (uint32_t) state->v3);
- printf("(%3zu) compress padding %08x %08x\n", state->inlen, (uint32_t) (state->padding >> 32), (uint32_t)state->padding);
-#endif
-
- state->v3 ^= state->padding;
- sipround(state);
- sipround(state);
- state->v0 ^= state->padding;
-
- state->padding = 0;
- }
-
- end -= (state->inlen % sizeof(uint64_t));
-
- for ( ; in < end; in += 8) {
- m = unaligned_read_le64(in);
-#ifdef DEBUG
- printf("(%3zu) v0 %08x %08x\n", state->inlen, (uint32_t) (state->v0 >> 32), (uint32_t) state->v0);
- printf("(%3zu) v1 %08x %08x\n", state->inlen, (uint32_t) (state->v1 >> 32), (uint32_t) state->v1);
- printf("(%3zu) v2 %08x %08x\n", state->inlen, (uint32_t) (state->v2 >> 32), (uint32_t) state->v2);
- printf("(%3zu) v3 %08x %08x\n", state->inlen, (uint32_t) (state->v3 >> 32), (uint32_t) state->v3);
- printf("(%3zu) compress %08x %08x\n", state->inlen, (uint32_t) (m >> 32), (uint32_t) m);
-#endif
- state->v3 ^= m;
- sipround(state);
- sipround(state);
- state->v0 ^= m;
- }
-
- left = state->inlen & 7;
- switch (left) {
- case 7:
- state->padding |= ((uint64_t) in[6]) << 48;
- case 6:
- state->padding |= ((uint64_t) in[5]) << 40;
- case 5:
- state->padding |= ((uint64_t) in[4]) << 32;
- case 4:
- state->padding |= ((uint64_t) in[3]) << 24;
- case 3:
- state->padding |= ((uint64_t) in[2]) << 16;
- case 2:
- state->padding |= ((uint64_t) in[1]) << 8;
- case 1:
- state->padding |= ((uint64_t) in[0]);
- case 0:
- break;
- }
-}
-
-uint64_t siphash24_finalize(struct siphash *state) {
- uint64_t b;
-
- assert(state);
-
- b = state->padding | (((uint64_t) state->inlen) << 56);
-
-#ifdef DEBUG
- printf("(%3zu) v0 %08x %08x\n", state->inlen, (uint32_t) (state->v0 >> 32), (uint32_t) state->v0);
- printf("(%3zu) v1 %08x %08x\n", state->inlen, (uint32_t) (state->v1 >> 32), (uint32_t) state->v1);
- printf("(%3zu) v2 %08x %08x\n", state->inlen, (uint32_t) (state->v2 >> 32), (uint32_t) state->v2);
- printf("(%3zu) v3 %08x %08x\n", state->inlen, (uint32_t) (state->v3 >> 32), (uint32_t) state->v3);
- printf("(%3zu) padding %08x %08x\n", state->inlen, (uint32_t) (state->padding >> 32), (uint32_t) state->padding);
-#endif
-
- state->v3 ^= b;
- sipround(state);
- sipround(state);
- state->v0 ^= b;
-
-#ifdef DEBUG
- printf("(%3zu) v0 %08x %08x\n", state->inlen, (uint32_t) (state->v0 >> 32), (uint32_t) state->v0);
- printf("(%3zu) v1 %08x %08x\n", state->inlen, (uint32_t) (state->v1 >> 32), (uint32_t) state->v1);
- printf("(%3zu) v2 %08x %08x\n", state->inlen, (uint32_t) (state->v2 >> 32), (uint32_t) state->v2);
- printf("(%3zu) v3 %08x %08x\n", state->inlen, (uint32_t) (state->v3 >> 32), (uint32_t) state->v3);
-#endif
- state->v2 ^= 0xff;
-
- sipround(state);
- sipround(state);
- sipround(state);
- sipround(state);
-
- return state->v0 ^ state->v1 ^ state->v2 ^ state->v3;
-}
-
-uint64_t siphash24(const void *in, size_t inlen, const uint8_t k[16]) {
- struct siphash state;
-
- assert(in);
- assert(k);
-
- siphash24_init(&state, k);
- siphash24_compress(in, inlen, &state);
-
- return siphash24_finalize(&state);
-}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-22 07:36:06 +0000