public string Decrypt(string encrypted_str)
{
Twofish fish = new Twofish();
fish.Mode = CipherMode.ECB;
byte[] plainText = {};
//create Twofish Decryptor from our twofish instance
ICryptoTransform decrypt = fish.CreateDecryptor(key, plainText);
System.IO.MemoryStream msD = new System.IO.MemoryStream();
//create crypto stream set to read and do a Twofish decryption transform on incoming bytes
CryptoStream cryptostreamDecr = new CryptoStream(msD, decrypt, CryptoStreamMode.Write);
byte[] bytOut = GetBytes(encrypted_str);
//write out Twofish encrypted stream
cryptostreamDecr.Write(bytOut, 0, bytOut.Length);
cryptostreamDecr.Close();
byte[] bytOutD = msD.GetBuffer();
return GetString(bytOutD);
}
public byte[] Decrypt(byte[] file)
{
Twofish fish = new Twofish();
fish.Mode = CipherMode.ECB;
byte[] dummy = { };
//create Twofish Decryptor from our twofish instance
ICryptoTransform decrypt = fish.CreateDecryptor(key, dummy);
System.IO.MemoryStream msD = new System.IO.MemoryStream();
//create crypto stream set to read and do a Twofish decryption transform on incoming bytes
CryptoStream cryptostreamDecr = new CryptoStream(msD, decrypt, CryptoStreamMode.Write);
//write out Twofish encrypted stream
cryptostreamDecr.Write(file, 0, file.Length);
cryptostreamDecr.Close();
byte[] buf = msD.GetBuffer();
// TODO: It might be pretty dangerous to cut on the size of the input buffer
// because of the padding some bytes might be added. However these bytes will
// be only zeros (External.Twofish uses Padding.Zero) so zeros should be OK.
Array.Resize(ref buf, file.Length);
// We can not remove any other padding bytes because we can not distinuish between
// bytes added by the crypto algo and bytes belonging to the original unecrtypted file.
return buf;
}
public MxoTwofish()
{
tf = new Twofish();
tf.Mode = CipherMode.CBC;
tf.KeySize = 128;
tf.BlockSize = 128;
}
static void Main(string[] args)
{
Twofish fish = new Twofish();
fish.Mode = CipherMode.ECB;
System.IO.MemoryStream ms = new System.IO.MemoryStream();
byte[] Key = {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16};
byte[] dummy = {};
//create Twofish Encryptor from this instance
ICryptoTransform encrypt = fish.CreateEncryptor(Key, dummy); // we use the plainText as the IV as in ECB mode the IV is not used
//Create Crypto Stream that transforms file stream using twofish encryption
CryptoStream cryptostream = new CryptoStream(ms, encrypt, CryptoStreamMode.Write);
byte[] plainText = GetBytes("Some string to encrypt");
//write out Twofish encrypted stream
cryptostream.Write(plainText, 0, plainText.Length);
cryptostream.Close();
byte[] bytOut = ms.ToArray();
System.Console.WriteLine( "Encrypted string: " + GetString( bytOut ) );
//create Twofish Decryptor from our twofish instance
ICryptoTransform decrypt = fish.CreateDecryptor(Key, plainText);
System.IO.MemoryStream msD = new System.IO.MemoryStream();
//create crypto stream set to read and do a Twofish decryption transform on incoming bytes
CryptoStream cryptostreamDecr = new CryptoStream(msD, decrypt, CryptoStreamMode.Write);
//write out Twofish encrypted stream
cryptostreamDecr.Write(bytOut, 0, bytOut.Length);
cryptostreamDecr.Close();
byte[] bytOutD = msD.GetBuffer();
System.Console.WriteLine("Decrypted string: " + GetString(bytOutD));
}
public ShadowPlugin(ProxyFrame frame)
{
fish = new Twofish();
fish.Mode = CipherMode.ECB;
ms = new System.IO.MemoryStream();
formthread = new Thread(new ThreadStart(delegate()
{
form = new ShadowForm1(this);
Application.Run(form);
}));
formthread.SetApartmentState(ApartmentState.STA);
formthread.Start();
this.frame = frame;
this.proxy = frame.proxy;
this.proxy.AddDelegate(PacketType.ScriptDialogReply, Direction.Outgoing, new PacketDelegate(OutDialogFromViewer));
this.proxy.AddDelegate(PacketType.ChatFromViewer, Direction.Outgoing, new PacketDelegate(OutChatFromViewerHandler));
this.proxy.AddDelegate(PacketType.ImprovedInstantMessage, Direction.Incoming, new PacketDelegate(RecivedIM));
this.proxy.AddDelegate(PacketType.ImprovedInstantMessage, Direction.Outgoing, new PacketDelegate(SendingIM));
this.proxy.AddDelegate(PacketType.ChatFromSimulator, Direction.Incoming, new PacketDelegate(InChatFromServerHandler));
}
public string Encrypt(string str)
{
Twofish fish = new Twofish();
fish.Mode = CipherMode.ECB;
System.IO.MemoryStream ms = new System.IO.MemoryStream();
byte[] dummy = { };
//create Twofish Encryptor from this instance
ICryptoTransform encrypt = fish.CreateEncryptor(key, dummy); // we use the plainText as the IV as in ECB mode the IV is not used
//Create Crypto Stream that transforms file stream using twofish encryption
CryptoStream cryptostream = new CryptoStream(ms, encrypt, CryptoStreamMode.Write);
byte[] plainText = GetBytes(str);
//write out Twofish encrypted stream
cryptostream.Write(plainText, 0, plainText.Length);
cryptostream.Close();
byte[] bytOut = ms.ToArray();
return GetString(bytOut);
}
public string shadow_encrypt(string plainText)
{
fish = new Twofish();
fish.Mode = CipherMode.ECB;
ms = new System.IO.MemoryStream();
//form.log("we were guna send the IM with " + plainText);
byte [] plainBytes = Utils.StringToBytes(plainText);
ICryptoTransform encode = new ToBase64Transform();
ICryptoTransform encrypt = fish.CreateEncryptor(form.getKey(),plainBytes);
CryptoStream cryptostream = new CryptoStream(new CryptoStream(ms,encode,CryptoStreamMode.Write),encrypt,CryptoStreamMode.Write);
cryptostream.Write(plainBytes,0,plainBytes.Length);
cryptostream.Close();
byte[] bytOut = ms.ToArray();
form.log("We encrypted "+plainText+" to "+Utils.BytesToString(bytOut),Color.DarkRed);
return Utils.BytesToString(bytOut);
}
public string shadow_decrypt(string encyptedText)
{
fish = new Twofish();
fish.Mode = CipherMode.ECB;
ms = new System.IO.MemoryStream();
//form.log("we were sent the IM with " + encyptedText);
byte[] encyptedBytes = Utils.StringToBytes(encyptedText);
ICryptoTransform decode = new FromBase64Transform();
//create DES Decryptor from our des instance
ICryptoTransform decrypt = fish.CreateDecryptor(form.getKey(), encyptedBytes);
System.IO.MemoryStream msD = new System.IO.MemoryStream();
CryptoStream cryptostreamDecode = new CryptoStream(new CryptoStream(msD,decrypt,CryptoStreamMode.Write),decode,CryptoStreamMode.Write);
cryptostreamDecode.Write(encyptedBytes, 0, encyptedBytes.Length);
cryptostreamDecode.Close();
byte[] bytOutD = msD.ToArray(); // we should now have our plain text back
form.log("We decrypted "+encyptedText+" to " + Utils.BytesToString(bytOutD),Color.Red);
return ""+this.indicator+""+Utils.BytesToString(bytOutD);
}
