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bug fixes for secp256k1

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NIIBE Yutaka
2014-02-21 17:24:19 +09:00
parent 2accc339e2
commit ede98fbe7e
7 changed files with 26 additions and 3 deletions
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7
src/ecc.c
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@@ -140,11 +140,10 @@ FUNC(compute_kG) (ac *X, const bn256 *K)
for (i = 31; i >= 0; i--)
{
FUNC(jpc_double) (Q, Q);
FUNC(jpc_add_ac_signed) (Q, Q, &precomputed_KG[index[i]&0x0f],
index[i] >> 7);
FUNC(jpc_add_ac_signed) (Q, Q, &precomputed_2E_KG[index[i+32]&0x0f],
index[i+32] >> 7);
FUNC(jpc_add_ac_signed) (Q, Q, &precomputed_KG[index[i]&0x0f],
index[i] >> 7);
}
dst = k_is_even ? Q : tmp;
@@ -170,8 +169,10 @@ point_is_on_the_curve (const ac *P)
MFNC(sqr) (s, P->x);
MFNC(mul) (s, s, P->x);
#ifdef COEFFICIENT_A_IS_ZERO
MFNC(mul) (t, coefficient_a, P->x);
MFNC(add) (s, s, t);
#endif
MFNC(add) (s, s, coefficient_b);
MFNC(sqr) (t, P->y);