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test: siphash24 - verify internal state and composability

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Verify the state of the hash-function according to the reference paper,
also verify that we can decompose the input and hash the chunks one
by one and still get the same result.
This commit is contained in:
Tom Gundersen 2015-10-04 00:24:23 +02:00
parent 7c57f504c9
commit 1283d70417
1 changed files with 32 additions and 1 deletions
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33
src/test/test-siphash24.c
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@ -26,15 +26,17 @@
/* see https://131002.net/siphash/siphash.pdf, Appendix A */
int main(int argc, char *argv[]) {
struct siphash state = {};
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};
uint64_t out = 0;
unsigned k;
unsigned i, j, k;
usec_t ts;
siphash24((uint8_t *)&out, in, sizeof(in), key);
assert_se(out == 0xa129ca6149be45e5);
assert_se(out == 0xa129ca6149be45e5ULL);
@ -44,4 +46,33 @@ int main(int argc, char *argv[]) {
ts = now(CLOCK_MONOTONIC) - ts;
log_info("%llu iterations per second", (ITERATIONS * USEC_PER_SEC) / ts);
/* verify the internal state as given in the above paper */
siphash_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, sizeof(in), &state);
assert_se(state.v0 == 0x4a017198de0a59e0);
assert_se(state.v1 == 0x0d52f6f62a4f59a4);
assert_se(state.v2 == 0x634cb3577b01fd3d);
assert_se(state.v3 == 0xa5224d6f55c7d9c8);
assert_se(siphash24_finalize(&state) == 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 < sizeof(in); i++) {
for (j = i; j < sizeof(in); j++) {
siphash_init(&state, key);
siphash24_compress(in, i, &state);
siphash24_compress(&in[i], j - i, &state);
siphash24_compress(&in[j], sizeof(in) - j, &state);
assert_se(siphash24_finalize(&state) == 0xa129ca6149be45e5);
}
}
}