diff options
| -rw-r--r-- | src/basic/siphash24.c | 79 |
1 files changed, 43 insertions, 36 deletions
diff --git a/src/basic/siphash24.c b/src/basic/siphash24.c index e7adfe48c8..86d4975ff4 100644 --- a/src/basic/siphash24.c +++ b/src/basic/siphash24.c @@ -72,43 +72,29 @@ static void siphash_init(struct siphash *state, const uint8_t k[16]) { state->v3 = 0x7465646279746573ULL ^ k1; } -static u64 siphash24_finalize(struct siphash *state) { - state->v2 ^= 0xff; - SIPROUND(state); - SIPROUND(state); - SIPROUND(state); - SIPROUND(state); - - return state->v0 ^ state->v1 ^ state->v2 ^ state->v3; -} - -/* SipHash-2-4 */ -void siphash24(uint8_t out[8], const void *_in, size_t inlen, const uint8_t k[16]) -{ - struct siphash state; +static void siphash24_compress(const void *_in, size_t inlen, struct siphash *state) { u64 b; u64 m; const u8 *in = _in; const u8 *end = in + inlen - ( inlen % sizeof( u64 ) ); const int left = inlen & 7; - b = ( ( u64 )inlen ) << 56; - siphash_init(&state, k); + b = ( ( u64 )inlen ) << 56; for ( ; in != end; in += 8 ) { m = U8TO64_LE( in ); #ifdef DEBUG - printf( "(%3d) v0 %08x %08x\n", ( int )inlen, ( u32 )( state.v0 >> 32 ), ( u32 )state.v0 ); - printf( "(%3d) v1 %08x %08x\n", ( int )inlen, ( u32 )( state.v1 >> 32 ), ( u32 )state.v1 ); - printf( "(%3d) v2 %08x %08x\n", ( int )inlen, ( u32 )( state.v2 >> 32 ), ( u32 )state.v2 ); - printf( "(%3d) v3 %08x %08x\n", ( int )inlen, ( u32 )( state.v3 >> 32 ), ( u32 )state.v3 ); + printf( "(%3d) v0 %08x %08x\n", ( int )inlen, ( u32 )( state->v0 >> 32 ), ( u32 )state->v0 ); + printf( "(%3d) v1 %08x %08x\n", ( int )inlen, ( u32 )( state->v1 >> 32 ), ( u32 )state->v1 ); + printf( "(%3d) v2 %08x %08x\n", ( int )inlen, ( u32 )( state->v2 >> 32 ), ( u32 )state->v2 ); + printf( "(%3d) v3 %08x %08x\n", ( int )inlen, ( u32 )( state->v3 >> 32 ), ( u32 )state->v3 ); printf( "(%3d) compress %08x %08x\n", ( int )inlen, ( u32 )( m >> 32 ), ( u32 )m ); #endif - state.v3 ^= m; - SIPROUND(&state); - SIPROUND(&state); - state.v0 ^= m; + state->v3 ^= m; + SIPROUND(state); + SIPROUND(state); + state->v0 ^= m; } switch( left ) @@ -131,22 +117,43 @@ void siphash24(uint8_t out[8], const void *_in, size_t inlen, const uint8_t k[16 } #ifdef DEBUG - printf( "(%3d) v0 %08x %08x\n", ( int )inlen, ( u32 )( state.v0 >> 32 ), ( u32 )state.v0 ); - printf( "(%3d) v1 %08x %08x\n", ( int )inlen, ( u32 )( state.v1 >> 32 ), ( u32 )state.v1 ); - printf( "(%3d) v2 %08x %08x\n", ( int )inlen, ( u32 )( state.v2 >> 32 ), ( u32 )state.v2 ); - printf( "(%3d) v3 %08x %08x\n", ( int )inlen, ( u32 )( state.v3 >> 32 ), ( u32 )state.v3 ); + printf( "(%3d) v0 %08x %08x\n", ( int )inlen, ( u32 )( state->v0 >> 32 ), ( u32 )state->v0 ); + printf( "(%3d) v1 %08x %08x\n", ( int )inlen, ( u32 )( state->v1 >> 32 ), ( u32 )state->v1 ); + printf( "(%3d) v2 %08x %08x\n", ( int )inlen, ( u32 )( state->v2 >> 32 ), ( u32 )state->v2 ); + printf( "(%3d) v3 %08x %08x\n", ( int )inlen, ( u32 )( state->v3 >> 32 ), ( u32 )state->v3 ); printf( "(%3d) padding %08x %08x\n", ( int )inlen, ( u32 )( b >> 32 ), ( u32 )b ); #endif - state.v3 ^= b; - SIPROUND(&state); - SIPROUND(&state); - state.v0 ^= b; + state->v3 ^= b; + SIPROUND(state); + SIPROUND(state); + state->v0 ^= b; #ifdef DEBUG - printf( "(%3d) v0 %08x %08x\n", ( int )inlen, ( u32 )( state.v0 >> 32 ), ( u32 )state.v0 ); - printf( "(%3d) v1 %08x %08x\n", ( int )inlen, ( u32 )( state.v1 >> 32 ), ( u32 )state.v1 ); - printf( "(%3d) v2 %08x %08x\n", ( int )inlen, ( u32 )( state.v2 >> 32 ), ( u32 )state.v2 ); - printf( "(%3d) v3 %08x %08x\n", ( int )inlen, ( u32 )( state.v3 >> 32 ), ( u32 )state.v3 ); + printf( "(%3d) v0 %08x %08x\n", ( int )inlen, ( u32 )( state->v0 >> 32 ), ( u32 )state->v0 ); + printf( "(%3d) v1 %08x %08x\n", ( int )inlen, ( u32 )( state->v1 >> 32 ), ( u32 )state->v1 ); + printf( "(%3d) v2 %08x %08x\n", ( int )inlen, ( u32 )( state->v2 >> 32 ), ( u32 )state->v2 ); + printf( "(%3d) v3 %08x %08x\n", ( int )inlen, ( u32 )( state->v3 >> 32 ), ( u32 )state->v3 ); #endif +} + +static u64 siphash24_finalize(struct siphash *state) { + state->v2 ^= 0xff; + SIPROUND(state); + SIPROUND(state); + SIPROUND(state); + SIPROUND(state); + + return state->v0 ^ state->v1 ^ state->v2 ^ state->v3; +} + +/* SipHash-2-4 */ +void siphash24(uint8_t out[8], const void *_in, size_t inlen, const uint8_t k[16]) +{ + struct siphash state; + u64 b; + + siphash_init(&state, k); + + siphash24_compress(_in, inlen, &state); b = siphash24_finalize(&state); |