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Optimized keccak

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SChernykh 2022-03-24 12:52:57 +01:00
parent 0c2b7d6010
commit cdc3206ee8
1 changed files with 12 additions and 8 deletions
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20
src/keccak.cpp
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@ -48,17 +48,21 @@ NOINLINE void keccakf(uint64_t* st)
bc[3] = st[3] ^ st[8] ^ st[13] ^ st[18] ^ st[23];
bc[4] = st[4] ^ st[9] ^ st[14] ^ st[19] ^ st[24];
for (int i = 0; i < 5; ++i) {
uint64_t t = bc[(i + 4) % 5] ^ ROTL64(bc[(i + 1) % 5], 1);
st[i + 0 ] ^= t;
st[i + 5] ^= t;
st[i + 10] ^= t;
st[i + 15] ^= t;
st[i + 20] ^= t;
#define X(i) { \
const uint64_t t = bc[(i + 4) % 5] ^ ROTL64(bc[(i + 1) % 5], 1); \
st[i + 0 ] ^= t; \
st[i + 5] ^= t; \
st[i + 10] ^= t; \
st[i + 15] ^= t; \
st[i + 20] ^= t; \
}
X(0); X(1); X(2); X(3); X(4);
#undef X
// Rho Pi
uint64_t t = st[1];
const uint64_t t = st[1];
st[ 1] = ROTL64(st[ 6], 44);
st[ 6] = ROTL64(st[ 9], 20);
st[ 9] = ROTL64(st[22], 61);