/*** This file is part of systemd. Copyright 2015 Tom Gundersen systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include "siphash24.h" #include "util.h" #define ITERATIONS 10000000ULL static void do_test(const uint8_t *in, size_t len, const uint8_t *key) { struct siphash state = {}; uint64_t out; unsigned i, j; out = siphash24(in, len, key); assert_se(out == 0xa129ca6149be45e5); /* verify the internal state as given in the above paper */ siphash24_init(&state, key); assert_se(state.v0 == 0x7469686173716475); assert_se(state.v1 == 0x6b617f6d656e6665); assert_se(state.v2 == 0x6b7f62616d677361); assert_se(state.v3 == 0x7b6b696e727e6c7b); siphash24_compress(in, len, &state); assert_se(state.v0 == 0x4a017198de0a59e0); assert_se(state.v1 == 0x0d52f6f62a4f59a4); assert_se(state.v2 == 0x634cb3577b01fd3d); assert_se(state.v3 == 0xa5224d6f55c7d9c8); out = siphash24_finalize(&state); assert_se(out == 0xa129ca6149be45e5); assert_se(state.v0 == 0xf6bcd53893fecff1); assert_se(state.v1 == 0x54b9964c7ea0d937); assert_se(state.v2 == 0x1b38329c099bb55a); assert_se(state.v3 == 0x1814bb89ad7be679); /* verify that decomposing the input in three chunks gives the same result */ for (i = 0; i < len; i++) { for (j = i; j < len; j++) { siphash24_init(&state, key); siphash24_compress(in, i, &state); siphash24_compress(&in[i], j - i, &state); siphash24_compress(&in[j], len - j, &state); out = siphash24_finalize(&state); assert_se(out == 0xa129ca6149be45e5); } } } static void test_short_hashes(void) { const uint8_t one[] = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16 }; const uint8_t key[16] = { 0x22, 0x24, 0x41, 0x22, 0x55, 0x77, 0x88, 0x07, 0x23, 0x09, 0x23, 0x14, 0x0c, 0x33, 0x0e, 0x0f}; uint8_t two[sizeof one] = {}; struct siphash state1 = {}, state2 = {}; unsigned i, j; siphash24_init(&state1, key); siphash24_init(&state2, key); /* hashing 1, 2, 3, 4, 5, ..., 16 bytes, with the byte after the buffer different */ for (i = 1; i <= sizeof one; i++) { siphash24_compress(one, i, &state1); two[i-1] = one[i-1]; siphash24_compress(two, i, &state2); assert_se(memcmp(&state1, &state2, sizeof state1) == 0); } /* hashing n and 1, n and 2, n and 3, ..., n-1 and 1, n-2 and 2, ... */ for (i = sizeof one; i > 0; i--) { zero(two); for (j = 1; j <= sizeof one; j++) { siphash24_compress(one, i, &state1); siphash24_compress(one, j, &state1); siphash24_compress(one, i, &state2); two[j-1] = one[j-1]; siphash24_compress(two, j, &state2); assert_se(memcmp(&state1, &state2, sizeof state1) == 0); } } } /* see https://131002.net/siphash/siphash.pdf, Appendix A */ int main(int argc, char *argv[]) { const uint8_t in[15] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e }; const uint8_t key[16] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f}; uint8_t in_buf[20]; /* Test with same input but different alignments. */ memcpy(in_buf, in, sizeof(in)); do_test(in_buf, sizeof(in), key); memcpy(in_buf + 1, in, sizeof(in)); do_test(in_buf + 1, sizeof(in), key); memcpy(in_buf + 2, in, sizeof(in)); do_test(in_buf + 2, sizeof(in), key); memcpy(in_buf + 4, in, sizeof(in)); do_test(in_buf + 4, sizeof(in), key); test_short_hashes(); }