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sha256_4way: skip last 3 rounds.

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Pointed out by several people, including Raulo.
This commit is contained in:
Jeff Garzik 2011-03-02 22:03:11 -05:00 committed by Jeff Garzik
parent a27e69aec5
commit ef91bd59e2
1 changed files with 4 additions and 0 deletions
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sha256_4way.c
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@ -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) \