public byte[] Compress(byte[] buffer)
{
byte[] compressed = compressor.Compress(buffer);
Serializer serializer = new Serializer();
serializer.Write((short)compressed.Length);
serializer.Write((short)buffer.Length);
serializer.Write(compressed);
return serializer.GetBytes();
}
public static byte[] ToBytes(uint[] uints)
{
Serializer serializer = new Serializer();
serializer.Write(uints[0]);
serializer.Write(uints[1]);
serializer.Write(uints[2]);
serializer.Write(uints[3]);
serializer.Write(uints[4]);
return serializer.GetBytes();
}
public byte[] Serialize(ISession session, IMessage message)
{
// serialize the data into a bytestream
Serializer serializer = new Serializer();
message.Serialize(serializer);
// postprocessing...
byte[] compressed = this.compressor.Compress(serializer.GetBytes());
byte[] encrypted = this.encryptor.Encrypt(compressed);
return encrypted;
}
public IEnumerable<IMessage> Deserialize(ISession session, byte[] data)
{
Deserializer deserializer = new Deserializer(data);
while (deserializer.BaseStream.Position < deserializer.BaseStream.Length)
{
byte header = deserializer.ReadByte();
byte length = deserializer.ReadByte();
switch (length)
{
case 0x05: // Version
deserializer.BaseStream.Position += 2;
/*this.clientVersion = */deserializer.ReadUInt32();
deserializer.BaseStream.Position += 56; // Probably wrong offset
break;
case 0x42: // PublicKey
byte[] publicKey = deserializer.ReadBytes(64);
byte[] sharedKey = DiffieHellman.GenerateSharedKey(publicKey, Keys.PrivateKey, Keys.Prime);
byte[] randomBytes = CryptoUtils.GetRandomBytes();
byte[] hashedRandomBytes = CryptoUtils.Hash(randomBytes);
byte[] xoredRandomBytes = CryptoUtils.XOR(randomBytes, sharedKey);
this.key = hashedRandomBytes;
Serializer serializer = new Serializer();
serializer.Write((byte)0x01); // RC4Seed Header
serializer.Write((byte)0x16); // RC4Seed Length
serializer.Write(xoredRandomBytes); // xored RC4Key
session.Send(serializer.GetBytes());
session.State = prepareNewState();
break;
default:
Console.WriteLine("Unhandled packet, header: {0}, length: {1}", header, length);
break;
}
}
// mock up, since we return the byte-encoded messages directly
return new IMessage[] {};
}
