diff options
| -rw-r--r-- | libbb/hash_md5_sha.c | 61 |
1 files changed, 18 insertions, 43 deletions
diff --git a/libbb/hash_md5_sha.c b/libbb/hash_md5_sha.c index 7ae0b6385..60f44cc3d 100644 --- a/libbb/hash_md5_sha.c +++ b/libbb/hash_md5_sha.c @@ -977,14 +977,12 @@ static const uint8_t KECCAK_PI_LANE[25] = { 14, 22, 9, 6, 1 }; -static const uint8_t MOD5[10] = { - 0, 1, 2, 3, 4, 0, 1, 2, 3, 4 -}; - #define ARCH_IS_64BIT (sizeof(long) >= sizeof(uint64_t)) static void KeccakF(uint64_t *state) { + /*static const uint8_t MOD5[10] = { 0, 1, 2, 3, 4, 0, 1, 2, 3, 4 };*/ + unsigned x, y; unsigned round; @@ -1009,18 +1007,11 @@ static void KeccakF(uint64_t *state) */ for (x = 0; x < 5; ++x) { uint64_t temp = BC[x + 4] ^ rotl64(BC[x + 1], 1); - if (SHA3_SMALL && !ARCH_IS_64BIT) { - for (y = 0; y <= 20; y += 5) - state[x + y] ^= temp; - } else { - /* On 64-bit, this is also smaller, - * not only faster, than loop */ - state[x] ^= temp; - state[x + 5] ^= temp; - state[x + 10] ^= temp; - state[x + 15] ^= temp; - state[x + 20] ^= temp; - } + state[x] ^= temp; + state[x + 5] ^= temp; + state[x + 10] ^= temp; + state[x + 15] ^= temp; + state[x + 20] ^= temp; } } @@ -1057,33 +1048,17 @@ static void KeccakF(uint64_t *state) /* Chi */ for (y = 0; y <= 20; y += 5) { - if (SHA3_SMALL && !ARCH_IS_64BIT) { - uint64_t BC[5]; - BC[0] = state[y + 0]; - BC[1] = state[y + 1]; - BC[2] = state[y + 2]; - BC[3] = state[y + 3]; - BC[4] = state[y + 4]; - for (x = 0; x < 5; ++x) { - state[y + x] = - BC[x] ^ ((~BC[MOD5[x + 1]]) & - BC[MOD5[x + 2]]); - } - } else { - /* 32-bit x86: +50 bytes code, 10% faster */ - /* 64-bit x86: ~same code size, 30% faster */ - uint64_t BC0, BC1, BC2, BC3, BC4; - BC0 = state[y + 0]; - BC1 = state[y + 1]; - BC2 = state[y + 2]; - state[y + 0] = BC0 ^ ((~BC1) & BC2); - BC3 = state[y + 3]; - state[y + 1] = BC1 ^ ((~BC2) & BC3); - BC4 = state[y + 4]; - state[y + 2] = BC2 ^ ((~BC3) & BC4); - state[y + 3] = BC3 ^ ((~BC4) & BC0); - state[y + 4] = BC4 ^ ((~BC0) & BC1); - } + uint64_t BC0, BC1, BC2, BC3, BC4; + BC0 = state[y + 0]; + BC1 = state[y + 1]; + BC2 = state[y + 2]; + state[y + 0] = BC0 ^ ((~BC1) & BC2); + BC3 = state[y + 3]; + state[y + 1] = BC1 ^ ((~BC2) & BC3); + BC4 = state[y + 4]; + state[y + 2] = BC2 ^ ((~BC3) & BC4); + state[y + 3] = BC3 ^ ((~BC4) & BC0); + state[y + 4] = BC4 ^ ((~BC0) & BC1); } /* Iota */ |