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-rw-r--r--src/basic/siphash24.c93
-rw-r--r--src/basic/siphash24.h12
2 files changed, 57 insertions, 48 deletions
diff --git a/src/basic/siphash24.c b/src/basic/siphash24.c
index 48ab8c23b8..10fc56da69 100644
--- a/src/basic/siphash24.c
+++ b/src/basic/siphash24.c
@@ -56,34 +56,37 @@ void siphash24_init(struct siphash *state, const uint8_t k[16]) {
k0 = unaligned_read_le64(k);
k1 = unaligned_read_le64(k + 8);
- /* "somepseudorandomlygeneratedbytes" */
- state->v0 = 0x736f6d6570736575ULL ^ k0;
- state->v1 = 0x646f72616e646f6dULL ^ k1;
- state->v2 = 0x6c7967656e657261ULL ^ k0;
- state->v3 = 0x7465646279746573ULL ^ k1;
- state->padding = 0;
- state->inlen = 0;
+ *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) {
- uint64_t m;
+
const uint8_t *in = _in;
const uint8_t *end = in + inlen;
- unsigned left = state->inlen & 7;
+ size_t left = state->inlen & 7;
+ uint64_t m;
assert(in);
assert(state);
- /* update total length */
+ /* Update total length */
state->inlen += inlen;
- /* if padding exists, fill it out */
+ /* If padding exists, fill it out */
if (left > 0) {
- for ( ; in < end && left < 8; in ++, left ++ )
- state->padding |= ( ( uint64_t )*in ) << (left * 8);
+ 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 */
+ /* We did not have enough input to fill out the padding completely */
return;
#ifdef DEBUG
@@ -93,6 +96,7 @@ void siphash24_compress(const void *_in, size_t inlen, struct siphash *state) {
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);
@@ -101,9 +105,9 @@ void siphash24_compress(const void *_in, size_t inlen, struct siphash *state) {
state->padding = 0;
}
- end -= ( state->inlen % sizeof (uint64_t) );
+ end -= (state->inlen % sizeof(uint64_t));
- for ( ; in < end; in += 8 ) {
+ 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);
@@ -119,38 +123,41 @@ void siphash24_compress(const void *_in, size_t inlen, struct siphash *state) {
}
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]); break;
-
- case 0: break;
+ 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;
- b = state->padding | (( ( uint64_t )state->inlen ) << 56);
+ 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) 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);
@@ -172,12 +179,14 @@ uint64_t siphash24_finalize(struct siphash *state) {
return state->v0 ^ state->v1 ^ state->v2 ^ state->v3;
}
-/* SipHash-2-4 */
-uint64_t siphash24(const void *_in, size_t inlen, const uint8_t k[16]) {
+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);
+ siphash24_compress(in, inlen, &state);
return siphash24_finalize(&state);
}
diff --git a/src/basic/siphash24.h b/src/basic/siphash24.h
index 0e072eba36..ba4f7d01b6 100644
--- a/src/basic/siphash24.h
+++ b/src/basic/siphash24.h
@@ -4,12 +4,12 @@
#include <sys/types.h>
struct siphash {
- uint64_t v0;
- uint64_t v1;
- uint64_t v2;
- uint64_t v3;
- uint64_t padding;
- size_t inlen;
+ uint64_t v0;
+ uint64_t v1;
+ uint64_t v2;
+ uint64_t v3;
+ uint64_t padding;
+ size_t inlen;
};
void siphash24_init(struct siphash *state, const uint8_t k[16]);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-14 22:14:24 +0000