|
public ModInverse ( |
||
| modulus | ||
| return | ||
public void Verify(byte[] data, byte[] expecteddata)
{
byte[] first = new byte[data.Length / 2];
byte[] second = new byte[data.Length / 2];
Array.Copy(data, 0, first, 0, first.Length);
Array.Copy(data, first.Length, second, 0, second.Length);
BigInteger r = new BigInteger(first);
BigInteger s = new BigInteger(second);
BigInteger w = s.ModInverse(_q);
BigInteger u1 = (new BigInteger(expecteddata) * w) % _q;
BigInteger u2 = (r * w) % _q;
BigInteger v = ((_g.ModPow(u1, _p) * _y.ModPow(u2, _p)) % _p) % _q;
if (v != r)
throw new VerifyException("Failed to verify");
}
