public string TripleDesEncrypt(string source, string keystr)
{
byte[] data = Encoding.UTF8.GetBytes(source);
byte[] key = GetByteKey(keystr);
TripleDESCryptoServiceProvider des = new TripleDESCryptoServiceProvider();
des.Padding = PaddingMode.PKCS7;
//Decrypt
Type t = Type.GetType("System.Security.Cryptography.CryptoAPITransformMode");
object obj = t.GetField("Encrypt", BindingFlags.Instance | BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.DeclaredOnly).GetValue(t);
MethodInfo mi = des.GetType().GetMethod("_NewEncryptor", BindingFlags.Instance | BindingFlags.NonPublic);
ICryptoTransform desCrypt = (ICryptoTransform)mi.Invoke(des, new object[] { key, CipherMode.ECB, null, 0, obj });
byte[] result = desCrypt.TransformFinalBlock(data, 0, data.Length);
return BitConverter.ToString(result).Replace("-", "");
}