protected override void Encode(IChannelHandlerContext context, IPacket message, IByteBuffer output)
{
var socket = context.Channel.GetAttribute(AbstractSocket.SocketKey).Get();
var dataLen = (short)message.Length;
var buffer = new byte[dataLen];
Array.Copy(message.Buffer, buffer, dataLen);
if (socket != null)
{
var seqSend = socket.SeqSend;
var rawSeq = (short)((seqSend >> 16) ^ -(95 + 1));
if (socket.EncryptData)
{
dataLen ^= rawSeq;
ShandaCipher.EncryptTransform(buffer);
AESCipher.Transform(buffer, seqSend);
}
output.WriteShortLE(rawSeq);
output.WriteShortLE(dataLen);
output.WriteBytes(buffer);
socket.SeqSend = IGCipher.InnoHash(seqSend, 4, 0);
}
else
{
output.WriteShortLE(dataLen);
output.WriteBytes(buffer);
}
}
public void HashResultIsAccurate()
{
const uint key = 0x100;
var result = IGCipher.InnoHash(key, 4, 0);
Assert.Equal((uint)0x2B1F7777, result);
Assert.NotEqual(key, result);
}
public NettyPacketDecoder(
ITransport transport,
AESCipher aesCipher,
IGCipher igCipher
) : base(NettyPacketState.DecodingHeader)
{
Debug.Assert(transport != null);
Debug.Assert(aesCipher != null);
Debug.Assert(igCipher != null);
_transport = transport;
_aesCipher = aesCipher;
_igCipher = igCipher;
}
public NettyPacketEncoder(
ITransport transport,
AESCipher aesCipher,
IGCipher igCipher
)
{
Debug.Assert(transport != null);
Debug.Assert(aesCipher != null);
Debug.Assert(igCipher != null);
_transport = transport;
_aesCipher = aesCipher;
_igCipher = igCipher;
}
protected override void Encode(IChannelHandlerContext context, Packet message, IByteBuffer output)
{
var socket = context.Channel.GetAttribute(Socket.SocketKey).Get();
if (socket != null)
{
lock (socket.LockSend)
{
var seqSend = socket.SeqSend;
var rawSeq = (short)((seqSend >> 16) ^ -(AESCipher.Version + 1));
var dataLen = (short)message.Length;
var buffer = new byte[dataLen];
Unpooled.CopiedBuffer(message.Buffer).ReadBytes(buffer);
if (socket.EncryptData)
{
dataLen ^= rawSeq;
buffer = ShandaCipher.EncryptTransform(buffer);
buffer = AESCipher.Transform(buffer, seqSend);
}
output.WriteShortLE(rawSeq);
output.WriteShortLE(dataLen);
output.WriteBytes(buffer);
socket.SeqSend = IGCipher.InnoHash(seqSend, 4, 0);
}
}
else
{
var length = message.Length;
var buffer = new byte[length];
message.Buffer.ReadBytes(buffer);
output.WriteShortLE(length);
output.WriteBytes(buffer);
}
}
protected override void Decode(IChannelHandlerContext context, IByteBuffer input, List <object> output)
{
var socket = context.Channel.GetAttribute(Socket.SocketKey).Get();
try
{
switch (State)
{
case PacketState.Header:
if (socket != null)
{
var sequence = input.ReadShortLE();
var length = input.ReadShortLE();
if (socket.EncryptData)
{
length ^= sequence;
}
_sequence = sequence;
_length = length;
}
else
{
_length = input.ReadShortLE();
}
Checkpoint(PacketState.Payload);
return;
case PacketState.Payload:
var buffer = new byte[_length];
input.ReadBytes(buffer);
Checkpoint(PacketState.Header);
if (_length < 0x2)
{
return;
}
if (_length > 0x10000)
{
return;
}
if (socket != null)
{
lock (socket.LockRecv)
{
var seqRecv = socket.SeqRecv;
var version = (short)(seqRecv >> 16) ^ _sequence;
if (!(version == -(AESCipher.Version + 1) ||
version == AESCipher.Version))
{
return;
}
if (socket.EncryptData)
{
buffer = AESCipher.Transform(buffer, seqRecv);
buffer = ShandaCipher.DecryptTransform(buffer);
}
socket.SeqRecv = IGCipher.InnoHash(seqRecv, 4, 0);
}
}
output.Add(new InPacket(Unpooled.CopiedBuffer(buffer)));
return;
}
}
catch (IndexOutOfRangeException)
{
RequestReplay();
}
}
