public void Symbol_BigValue_Test()
{
// secp256k1 prime
BigInteger prime = BigInteger.Parse("115792089237316195423570985008687907853269984665640564039457584007908834671663");
Random rnd = new Random();
byte[] ba = new byte[32];
rnd.NextBytes(ba);
BigInteger n = ba.ToBigInt(true, true);
BigInteger ls = BigInteger.ModPow(n, (prime - 1) / 2, prime);
int expected = (ls == prime - 1) ? -1 : (int)ls;
int actual = Legendre.Symbol(n, prime);
Assert.Equal(expected, actual);
}
public void Symbol_ExceptionTest()
{
Assert.Throws <ArithmeticException>(() => Legendre.Symbol(2, 1));
}
public void SymbolTest(BigInteger n, BigInteger p, int expected)
{
int actual = Legendre.Symbol(n, p);
Assert.Equal(expected, actual);
}