public static IEnumerable <Message> ParseIncoming(byte[] data, Blowfish blowfishContext = null)
{
for (int pos = 0; pos < data.Length;)
{
if (pos + 6 > data.Length)
{
throw new Exception("Incomplete Header received!");
}
int packetSize = data[pos + 2] + 256 * data[pos + 1] + 256 * 256 * data[pos + 0];
MessageType type = (MessageType)(data[pos + 3] >> 6);
MessageCode code = (MessageCode)(data[pos + 4]);
byte numA = (byte)(data[pos + 5] >> 4);
byte numB = (byte)(data[pos + 5] & 0x0F);
if (pos + packetSize > data.Length)
{
throw new Exception("Incomplete message body received!");
}
var argLen = packetSize - 6;
byte[] msgData = new byte[argLen];
if (argLen != 0)
{
Array.Copy(data, pos + 6, msgData, 0, argLen);
switch (type)
{
case MessageType.GSMessage:
XorCrypt.Decrypt(msgData);
break;
case MessageType.GSEncryptMessage:
if (blowfishContext == null)
{
throw new Exception("Received BF encrypted message, but no key available!");
}
blowfishContext.DecipherPadded(ref msgData);
break;
case MessageType.GameMessage:
throw new NotImplementedException("GameMessage received, WAT DO?");
}
}
yield return(new Message(type, code, DNodeList.Parse(msgData), numA, numB));
pos += packetSize;
}
yield break;
}
public byte[] Serialize(Blowfish blowfishContext = null)
{
var msgData = Data.Serialize();
if (msgData.Length > 0)
{
switch (Type)
{
case MessageType.GSMessage:
XorCrypt.Encrypt(msgData);
break;
case MessageType.GSEncryptMessage:
if (blowfishContext == null)
{
throw new Exception("Missing blowfish key!");
}
blowfishContext.EncipherPadded(ref msgData);
break;
case MessageType.GameMessage:
throw new NotImplementedException("Sending clGameMessage, WAT DO?");
}
}
var msgLen = msgData.Length + 6;
var message = new byte[msgLen];
message[0] = (byte)(msgLen >> 16);
message[1] = (byte)(msgLen >> 8);
message[2] = (byte)msgLen;
message[3] = (byte)((int)Type << 6);
message[4] = (byte)Code;
message[5] = (byte)(NumA << 4 | (NumB & 0x0F));
Array.Copy(msgData, 0, message, 6, msgData.Length);
return(message);
}
