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Exploit constants in SHA-256d

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pooler 2012-03-30 00:40:41 +02:00
parent 8c19b40b24
commit d4dddcb113
2 changed files with 1103 additions and 87 deletions
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1158
sha2-x64.S
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32
sha2.c
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@ -216,23 +216,30 @@ static inline void sha256d_ms(uint32_t *hash, uint32_t *W,
const uint32_t *midstate, const uint32_t *prehash)
{
uint32_t S[64];
uint32_t E[14];
uint32_t t0, t1;
int i;
memcpy(E, W + 18, sizeof(E));
S[18] = W[18];
S[19] = W[19];
S[20] = W[20];
S[22] = W[22];
S[23] = W[23];
S[24] = W[24];
S[30] = W[30];
S[31] = W[31];
W[18] += s0(W[3]);
W[19] += W[3];
W[20] += s1(W[18]);
W[21] += s1(W[19]);
W[21] = s1(W[19]);
W[22] += s1(W[20]);
W[23] += s1(W[21]);
W[24] += s1(W[22]);
W[25] += s1(W[23]) + W[18];
W[26] += s1(W[24]) + W[19];
W[27] += s1(W[25]) + W[20];
W[28] += s1(W[26]) + W[21];
W[29] += s1(W[27]) + W[22];
W[25] = s1(W[23]) + W[18];
W[26] = s1(W[24]) + W[19];
W[27] = s1(W[25]) + W[20];
W[28] = s1(W[26]) + W[21];
W[29] = s1(W[27]) + W[22];
W[30] += s1(W[28]) + W[23];
W[31] += s1(W[29]) + W[24];
for (i = 32; i < 64; i += 2) {
@ -307,7 +314,14 @@ static inline void sha256d_ms(uint32_t *hash, uint32_t *W,
for (i = 0; i < 8; i++)
S[i] += midstate[i];
memcpy(W + 18, E, sizeof(E));
W[18] = S[18];
W[19] = S[19];
W[20] = S[20];
W[22] = S[22];
W[23] = S[23];
W[24] = S[24];
W[30] = S[30];
W[31] = S[31];
memcpy(S + 8, sha256d_hash1 + 8, 32);
S[16] = s1(sha256d_hash1[14]) + sha256d_hash1[ 9] + s0(S[ 1]) + S[ 0];