public static Encryption CreateClientLogin(LoginEncryptionType type, uint seed, uint key1, uint key2)
{
IEncryptor encryptor;
IDecryptor decryptor;
switch (type)
{
case LoginEncryptionType.None:
NoEncryption encryption = new NoEncryption();
encryptor = encryption;
decryptor = encryption;
break;
case LoginEncryptionType.Old:
case LoginEncryptionType.Rare:
throw new Exception("Unsupported login encryption.");
case LoginEncryptionType.New:
encryptor = new LoginEncryption(seed, key1, key2);
decryptor = new NoEncryption();
break;
default:
throw new Exception("Internal error.");
}
return new Encryption(encryptor, decryptor);
}
public static Encryption CreateClientLogin(LoginEncryptionType type, uint seed, uint key1, uint key2)
{
IEncryptor encryptor;
IDecryptor decryptor;
switch (type)
{
case LoginEncryptionType.None:
NoEncryption encryption = new NoEncryption();
encryptor = encryption;
decryptor = encryption;
break;
case LoginEncryptionType.Old:
case LoginEncryptionType.Rare:
throw new Exception("Unsupported login encryption.");
case LoginEncryptionType.New:
encryptor = new LoginEncryption(seed, key1, key2);
decryptor = new NoEncryption();
break;
default:
throw new Exception("Internal error.");
}
return(new Encryption(encryptor, decryptor));
}
public static EncryptionVersion FromLogin(LoginEncryptionType login)
{
switch (login)
{
case LoginEncryptionType.None:
return(new EncryptionVersion());
case LoginEncryptionType.Old:
return(new EncryptionVersion(1, 25, 35));
case LoginEncryptionType.Rare:
return(new EncryptionVersion(1, 25, 36));
case LoginEncryptionType.New:
return(new EncryptionVersion(1, 25, 37));
default:
throw new Exception("Internal error.");
}
}
protected override bool OnClientMessage(byte[] data)
{
switch (phase)
{
case Phase.Seed:
if (data.Length != 4)
{
throw new SocketException("Error while initializing LoginSocket. Invalid seed lenght.", this, data);
}
// Seed comes in little endian and encryption alghortm expects it in little endian, so i keep it as it is.
Seed = ByteConverter.LittleEndian.ToUInt32(data, 0);
CommunicationManager.LoginSeed = Seed;
SendToServer(data);
phase = Phase.Keys;
return(true);
case Phase.Keys:
if (data.Length != 62)
{
throw new SocketException("Error while initializing LoginSocket. Invalid login packet lenght.", this, data);
}
// Detect and create client encryption
uint key1;
uint key2;
LoginEncryptionType clientEnc = GetClientEncryption(data, out key1, out key2);
ClientEncryption = Encryption.CreateServerLogin(clientEnc, Seed, key1, key2);
// Read and create server encryption
uint serverKey1;
uint serverKey2;
LoginEncryptionType serverEnc;
int v = Int32.Parse(Core.LaunchData.ServerEncryption);
switch (v)
{
case 0:
serverKey1 = 0;
serverKey2 = 0;
serverEnc = LoginEncryptionType.None;
Trace.WriteLine("Using no server encryption.", "Communication");
break;
case 1:
serverKey1 = key1;
serverKey2 = key2;
serverEnc = clientEnc;
Trace.WriteLine(String.Format("Server key1: {1} key2: {2}", Seed.ToString("X"), serverKey1.ToString("X"), serverKey2.ToString("X")), "Communication");
break;
default:
try {
serverKey1 = UInt32.Parse(Core.LaunchData.ServerKey1, System.Globalization.NumberStyles.HexNumber);
serverKey2 = UInt32.Parse(Core.LaunchData.ServerKey2, System.Globalization.NumberStyles.HexNumber);
serverEnc = LoginEncryptionType.New;
}
catch (Exception e) {
throw new Exception("Error parsing server login keys.", e);
}
Trace.WriteLine(String.Format("Server key1: {1} key2: {2}", Seed.ToString("X"), serverKey1.ToString("X"), serverKey2.ToString("X")), "Communication");
break;
}
ServerEncryption = Encryption.CreateClientLogin(serverEnc, Seed, serverKey1, serverKey2);
byte[] decrypted = ClientEncryption.Decrypt(data);
// Save used account and password. They will be used to detect game encryprion.
CommunicationManager.Username = ByteConverter.BigEndian.ToAsciiString(decrypted, 1, 30);
CommunicationManager.Password = ByteConverter.BigEndian.ToAsciiString(decrypted, 31, 30);
SendToServer(decrypted);
// Zero password for security reasons
for (int i = 31; i < 61; i++)
{
decrypted[i] = 0;
}
Core.OnClientMessage(decrypted, CallbackResult.Sent);
phase = Phase.Normal;
return(true);
}
return(base.OnClientMessage(data));
}
