public string GetLoginBase64(int userId)
{
string privateKey = Encoding.UTF8.GetString(Resources.privatekey);
RSAParameters p = RSAHelper.ConvertFromPemPrivateKey(privateKey);
string start = "01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00";
string end = "010101010101010101010101010101010101010101010101010101010101010155914510010403030101";
string id = start + userId.ToString("X8") + end;
int l = id.Length;
byte[] bufId = (new BigInteger(id, 16)).getBytes();
byte[] mm = DataTranslate.HexStringToByte(id);
byte[] bufCode = RSAHelper.RsaDecrypt(mm, p.D, p.Modulus);
string base64 = Convert.ToBase64String(bufCode);
return(base64);
}