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sha3: cache ctx->bytes_queued

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function                                             old     new   delta
sha3_hash                                            171     155     -16

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2013-01-15 22:19:24 +01:00
parent 8fb3ab528e
commit 970aa6b5bd
1 changed files with 11 additions and 11 deletions
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22
libbb/hash_md5_sha.c
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@ -977,8 +977,6 @@ static const uint8_t KECCAK_PI_LANE[25] = {
14, 22, 9, 6, 1
};
#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 };*/
@ -1074,8 +1072,6 @@ static void KeccakF(uint64_t *state)
}
}
#undef ARCH_IS_64BIT
void FAST_FUNC sha3_begin(sha3_ctx_t *ctx)
{
memset(ctx, 0, sizeof(*ctx));
@ -1084,16 +1080,17 @@ void FAST_FUNC sha3_begin(sha3_ctx_t *ctx)
void FAST_FUNC sha3_hash(sha3_ctx_t *ctx, const void *buf, size_t bytes)
{
const uint8_t *data = buf;
unsigned bytes_queued = ctx->bytes_queued;
/* If already data in queue, continue queuing first */
while (bytes != 0 && ctx->bytes_queued != 0) {
while (bytes != 0 && bytes_queued != 0) {
uint8_t *buffer = (uint8_t*)ctx->state;
buffer[ctx->bytes_queued] ^= *data++;
buffer[bytes_queued] ^= *data++;
bytes--;
ctx->bytes_queued++;
if (ctx->bytes_queued == KECCAK_IBLK_BYTES) {
bytes_queued++;
if (bytes_queued == KECCAK_IBLK_BYTES) {
KeccakF(ctx->state);
ctx->bytes_queued = 0;
bytes_queued = 0;
}
}
@ -1113,16 +1110,19 @@ void FAST_FUNC sha3_hash(sha3_ctx_t *ctx, const void *buf, size_t bytes)
} while (--count);
KeccakF(ctx->state);
bytes -= KECCAK_IBLK_BYTES;
}
/* Queue remaining data bytes */
while (bytes != 0) {
uint8_t *buffer = (uint8_t*)ctx->state;
buffer[ctx->bytes_queued] ^= *data++;
ctx->bytes_queued++;
buffer[bytes_queued] ^= *data++;
bytes_queued++;
bytes--;
}
ctx->bytes_queued = bytes_queued;
}
void FAST_FUNC sha3_end(sha3_ctx_t *ctx, uint8_t *hashval)