public static bool CheckECP(byte[] msg, BigInteger S, BigInteger N, BigInteger E)
{
BigInteger temp = BigInteger.ModPow(S, E, N);
HashMd5 hash = new HashMd5();
msg = hash.ComputeHash(msg);
BigInteger M = BigInteger.Abs(HashMd5.HashToBig(msg));
return(M == temp);
}
public static BigInteger ComputeS(byte[] msg, BigInteger D, BigInteger N)
{
HashMd5 hash = new HashMd5();
msg = hash.ComputeHash(msg);
BigInteger M = BigInteger.Abs(HashMd5.HashToBig(msg));
BigInteger S = BigInteger.ModPow(M, D, N);
return(S);
}