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| author | Jeff Garzik <jeff@garzik.org> | 2011-03-02 22:03:11 -0500 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2011-03-02 22:03:11 -0500 |
| commit | ef91bd59e2befdb4be7321593fe8dc8f1250080e (patch) | |
| tree | 0fc601c99457a13ef3f2c77b4b4ab86891bfdb03 | |
| parent | a27e69aec53806df3534ddb6e7e22165dbfb2f5b (diff) | |
sha256_4way: skip last 3 rounds.
Pointed out by several people, including Raulo.
| -rw-r--r-- | sha256_4way.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sha256_4way.c b/sha256_4way.c index 2c5afd8..742682f 100644 --- a/sha256_4way.c +++ b/sha256_4way.c @@ -452,12 +452,16 @@ static void DoubleBlockSHA256(const void* pin, void* pad, const void *pre, unsig SHA256ROUND(f, g, h, a, b, c, d, e, 59, w11); w12 = add4(SIGMA1_256(w10), w5, SIGMA0_256(w13), w12); SHA256ROUND(e, f, g, h, a, b, c, d, 60, w12); + + /* Skip last 3-rounds; not necessary for H==0 */ +#if 0 w13 = add4(SIGMA1_256(w11), w6, SIGMA0_256(w14), w13); SHA256ROUND(d, e, f, g, h, a, b, c, 61, w13); w14 = add4(SIGMA1_256(w12), w7, SIGMA0_256(w15), w14); SHA256ROUND(c, d, e, f, g, h, a, b, 62, w14); w15 = add4(SIGMA1_256(w13), w8, SIGMA0_256(w0), w15); SHA256ROUND(b, c, d, e, f, g, h, a, 63, w15); +#endif /* store resulsts directly in thash */ #define store_2(x,i) \ |