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NIIBE Yutaka
2014-01-21 14:26:31 +09:00
parent 0e7078bacb
commit af66c5fa08
1 changed files with 5 additions and 6 deletions
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11
src/jpc.c
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@@ -113,12 +113,11 @@ jpc_add_ac_signed (jpc *X, const jpc *A, const ac *B, int minus)
else
modp256_mul (b, b, B->y);
if (bn256_cmp (A->x, a) == 0)
if (bn256_cmp (A->y, b) == 0)
{
jpc_double (X, A);
return;
}
if (bn256_cmp (A->x, a) == 0 && bn256_cmp (A->y, b) == 0)
{
jpc_double (X, A);
return;
}
modp256_sub (c, a, A->x);
modp256_sub (d, b, A->y);