Hello!
BN_mod_inverse has a lines such as:
if (sign < 0)
{
if (!BN_sub(Y,n,Y)) goto err;
}
This is incorrect call of BN_sub(BIGNUM *r, const BIGNUM *a, const
BIGNUM *b), because BN_sub change first parameter r during arithmetic
operations and suppose r and b are different objects.
I think those lines of code must be look like this:
if (sign < 0)
{
if (!BN_sub(R,n,Y)) goto err;
if (BN_copy(Y,R) == NULL) goto err;
}
--
Eugene.
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