(state)->v2 += (state)->v1; (state)->v1=ROTL((state)->v1,17); (state)->v1 ^= (state)->v2; (state)->v2=ROTL((state)->v2,32); \
} while(0)
-struct siphash {
- u64 v0;
- u64 v1;
- u64 v2;
- u64 v3;
- u64 padding;
- size_t inlen;
-};
-
-static void siphash_init(struct siphash *state, const uint8_t k[16]) {
+void siphash_init(struct siphash *state, const uint8_t k[16]) {
u64 k0, k1;
k0 = U8TO64_LE( k );
state->inlen = 0;
}
-static void siphash24_compress(const void *_in, size_t inlen, struct siphash *state) {
+void siphash24_compress(const void *_in, size_t inlen, struct siphash *state) {
u64 m;
const u8 *in = _in;
- const u8 *end = in + inlen - ( inlen % sizeof( u64 ) );
- const int left = inlen & 7;
+ const u8 *end = in + inlen;
+ int left = state->inlen & 7;
- state->inlen = inlen;
+ /* update total length */
+ state->inlen += inlen;
- for ( ; in != end; in += 8 )
+ /* if padding exists, fill it out */
+ if (left > 0) {
+ for ( ; in < end && left < 8; in ++, left ++ )
+ state->padding |= ( ( u64 )*in ) << (left * 8);
+
+ if (in == end && left < 8)
+ /* we did not have enough input to fill out the padding completely */
+ return;
+
+#ifdef DEBUG
+ printf( "(%3d) v0 %08x %08x\n", ( int )state->inlen, ( u32 )( state->v0 >> 32 ), ( u32 )state->v0 );
+ printf( "(%3d) v1 %08x %08x\n", ( int )state->inlen, ( u32 )( state->v1 >> 32 ), ( u32 )state->v1 );
+ printf( "(%3d) v2 %08x %08x\n", ( int )state->inlen, ( u32 )( state->v2 >> 32 ), ( u32 )state->v2 );
+ printf( "(%3d) v3 %08x %08x\n", ( int )state->inlen, ( u32 )( state->v3 >> 32 ), ( u32 )state->v3 );
+ printf( "(%3d) compress padding %08x %08x\n", ( int )state->inlen, ( u32 )( state->padding >> 32 ), ( u32 )state->padding );
+#endif
+ state->v3 ^= state->padding;
+ SIPROUND(state);
+ SIPROUND(state);
+ state->v0 ^= state->padding;
+
+ state->padding = 0;
+ }
+
+ end -= ( state->inlen % sizeof (u64) );
+
+ for ( ; in < end; in += 8 )
{
m = U8TO64_LE( in );
#ifdef DEBUG
state->v0 ^= m;
}
+ left = state->inlen & 7;
+
switch( left )
{
case 7: state->padding |= ( ( u64 )in[ 6] ) << 48;
}
}
-static u64 siphash24_finalize(struct siphash *state) {
+uint64_t siphash24_finalize(struct siphash *state) {
u64 b;
b = state->padding | (( ( u64 )state->inlen ) << 56);