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| author | Denys Vlasenko <vda.linux@googlemail.com> | 2013-01-15 16:27:39 +0100 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2013-01-15 16:27:39 +0100 |
| commit | ac4100e103ca2b4e6e782c5814b1f43cef58c00b (patch) | |
| tree | e247d858cc0684f41f953d8eb87d6fcd4e9a610d | |
| parent | a55df2793660941f42589182537d02ce54eaed66 (diff) | |
| download | busybox-ac4100e103ca2b4e6e782c5814b1f43cef58c00b.tar.gz | |
sha3: code shrink
function old new delta
KeccakF 1053 1078 +25
KeccakF_RoundConstants 192 48 -144
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| -rw-r--r-- | libbb/hash_md5_sha.c | 62 |
1 files changed, 36 insertions, 26 deletions
diff --git a/libbb/hash_md5_sha.c b/libbb/hash_md5_sha.c index a0eec7789..4cd2244a1 100644 --- a/libbb/hash_md5_sha.c +++ b/libbb/hash_md5_sha.c @@ -933,32 +933,40 @@ enum { cKeccakNumberOfRounds = 24, }; -static const uint64_t KeccakF_RoundConstants[cKeccakNumberOfRounds] = { - 0x0000000000000001ULL, - 0x0000000000008082ULL, - 0x800000000000808aULL, - 0x8000000080008000ULL, - 0x000000000000808bULL, - 0x0000000080000001ULL, - 0x8000000080008081ULL, - 0x8000000000008009ULL, - 0x000000000000008aULL, - 0x0000000000000088ULL, - 0x0000000080008009ULL, - 0x000000008000000aULL, - 0x000000008000808bULL, - 0x800000000000008bULL, - 0x8000000000008089ULL, - 0x8000000000008003ULL, - 0x8000000000008002ULL, - 0x8000000000000080ULL, - 0x000000000000800aULL, - 0x800000008000000aULL, - 0x8000000080008081ULL, - 0x8000000000008080ULL, - 0x0000000080000001ULL, - 0x8000000080008008ULL +/* Elements should be 64-bit, but top half is always zero or 0x80000000. + * It is encoded as a separate word below. + * Same is true for 31th bits. + */ +static const uint16_t KeccakF_RoundConstants[cKeccakNumberOfRounds] = { + 0x0001UL, + 0x8082UL, + 0x808aUL, + 0x8000UL, + 0x808bUL, + 0x0001UL, + 0x8081UL, + 0x8009UL, + 0x008aUL, + 0x0088UL, + 0x8009UL, + 0x000aUL, + 0x808bUL, + 0x008bUL, + 0x8089UL, + 0x8003UL, + 0x8002UL, + 0x0080UL, + 0x800aUL, + 0x000aUL, + 0x8081UL, + 0x8080UL, + 0x0001UL, + 0x8008UL }; +/* 0th first - 0011 0011 0000 0111 1101 1101: */ +#define KeccakF_RoundConstantBit63 ((uint32_t)(0x3307dd00)) +/* 0th first - 0001 0110 0011 1000 0001 1011: */ +#define KeccakF_RoundConstantBit31 ((uint32_t)(0x16381b00)) static const uint8_t KeccakF_RotationConstants[25] = { 1, 3, 6, 10, 15, 21, 28, 36, 45, 55, 2, 14, 27, 41, 56, 8, 25, 43, 62, @@ -1075,7 +1083,9 @@ static void KeccakF(uint64_t *state) } /* Iota */ - state[0] ^= KeccakF_RoundConstants[round]; + state[0] ^= KeccakF_RoundConstants[round] + | (uint32_t)((KeccakF_RoundConstantBit31 << round) & 0x80000000) + | (uint64_t)((KeccakF_RoundConstantBit63 << round) & 0x80000000) << 32; } if (BB_BIG_ENDIAN) { |