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Update keccak.cpp

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SChernykh 2022-05-11 16:13:00 +02:00
parent 710e55422a
commit 516c382fe4
1 changed files with 23 additions and 56 deletions
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79
src/keccak.cpp
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@ -48,7 +48,7 @@ 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];
#define X(i) { \
#define THETA(i) { \
const uint64_t t = bc[(i + 4) % 5] ^ ROTL64(bc[(i + 1) % 5], 1); \
st[i + 0 ] ^= t; \
st[i + 5] ^= t; \
@ -57,9 +57,11 @@ NOINLINE void keccakf(uint64_t* st)
st[i + 20] ^= t; \
}
X(0); X(1); X(2); X(3); X(4);
#undef X
THETA(0);
THETA(1);
THETA(2);
THETA(3);
THETA(4);
// Rho Pi
const uint64_t t = st[1];
@ -89,60 +91,25 @@ NOINLINE void keccakf(uint64_t* st)
st[10] = ROTL64(t, 1);
// Chi
// unrolled loop, where only last iteration is different
int j = 0;
bc[0] = st[j + 0];
bc[1] = st[j + 1];
#define CHI(j) { \
const uint64_t st0 = st[j ]; \
const uint64_t st1 = st[j + 1]; \
const uint64_t st2 = st[j + 2]; \
const uint64_t st3 = st[j + 3]; \
const uint64_t st4 = st[j + 4]; \
st[j ] ^= ~st1 & st2; \
st[j + 1] ^= ~st2 & st3; \
st[j + 2] ^= ~st3 & st4; \
st[j + 3] ^= ~st4 & st0; \
st[j + 4] ^= ~st0 & st1; \
}
st[j + 0] ^= (~st[j + 1]) & st[j + 2];
st[j + 1] ^= (~st[j + 2]) & st[j + 3];
st[j + 2] ^= (~st[j + 3]) & st[j + 4];
st[j + 3] ^= (~st[j + 4]) & bc[0];
st[j + 4] ^= (~bc[0]) & bc[1];
CHI( 0);
CHI( 5);
CHI(10);
CHI(15);
CHI(20);
j = 5;
bc[0] = st[j + 0];
bc[1] = st[j + 1];
st[j + 0] ^= (~st[j + 1]) & st[j + 2];
st[j + 1] ^= (~st[j + 2]) & st[j + 3];
st[j + 2] ^= (~st[j + 3]) & st[j + 4];
st[j + 3] ^= (~st[j + 4]) & bc[0];
st[j + 4] ^= (~bc[0]) & bc[1];
j = 10;
bc[0] = st[j + 0];
bc[1] = st[j + 1];
st[j + 0] ^= (~st[j + 1]) & st[j + 2];
st[j + 1] ^= (~st[j + 2]) & st[j + 3];
st[j + 2] ^= (~st[j + 3]) & st[j + 4];
st[j + 3] ^= (~st[j + 4]) & bc[0];
st[j + 4] ^= (~bc[0]) & bc[1];
j = 15;
bc[0] = st[j + 0];
bc[1] = st[j + 1];
st[j + 0] ^= (~st[j + 1]) & st[j + 2];
st[j + 1] ^= (~st[j + 2]) & st[j + 3];
st[j + 2] ^= (~st[j + 3]) & st[j + 4];
st[j + 3] ^= (~st[j + 4]) & bc[0];
st[j + 4] ^= (~bc[0]) & bc[1];
j = 20;
bc[0] = st[j + 0];
bc[1] = st[j + 1];
bc[2] = st[j + 2];
bc[3] = st[j + 3];
bc[4] = st[j + 4];
st[j + 0] ^= (~bc[1]) & bc[2];
st[j + 1] ^= (~bc[2]) & bc[3];
st[j + 2] ^= (~bc[3]) & bc[4];
st[j + 3] ^= (~bc[4]) & bc[0];
st[j + 4] ^= (~bc[0]) & bc[1];
// Iota
st[0] ^= keccakf_rndc[round];
}