//public Packet(byte[] data)
// : this()
//{
// ParseData(ref data);
//}
public Packet(BinaryReader reader, PacketEncryptor packetEncryptor)
: this()
{
var header = reader.ReadBytes(HEADER_SIZE);
var packetBody = default(byte[]);
var xorKey = new byte[4];
Array.Copy(header, xorKey, xorKey.Length);
XorBytes(xorKey, ref header);
var encrypted = false;
var packetType = PacketType.Request;
using (var headerStream = new MemoryStream(header))
using (var headerReader = new BinaryReader(headerStream))
{
// Move to the encryption flags
headerReader.BaseStream.Seek(ENC_LENGTH, SeekOrigin.Begin);
var encFlags = headerReader.ReadDword();
var bytesToRead = headerReader.ReadDword() - 8;
packetType = headerReader.ReadPacketType();
packetBody = reader.ReadBytes((int)bytesToRead);
encrypted = encFlags == PacketEncryptor.ENC_AES256;
}
XorBytes(xorKey, ref packetBody);
if (encrypted)
{
packetBody = packetEncryptor.AesDecrypt(packetBody);
}
ParseData(packetType, ref packetBody);
}
public byte[] ToRaw(byte[] sessionGuid, PacketEncryptor packetEncryptor = null)
{
var packetData = default(byte[]);
packetEncryptor = packetEncryptor ?? PacketEncryptor.Blank;
using (var packetStream = new MemoryStream())
using (var writer = new BinaryWriter(packetStream))
{
var tlvData = default(byte[]);
using (var tlvStream = new MemoryStream())
using (var tlvWriter = new BinaryWriter(tlvStream))
{
foreach (var tlv in this.Tlvs.Values.AsEnumerable().Flatten())
{
tlv.ToRaw(tlvWriter);
}
tlvData = packetEncryptor.Encrypt(tlvStream.ToArray());
}
// Write a zero XOR key, which gets filled in later.
writer.WriteDword(0u);
writer.Write(sessionGuid);
writer.WriteDword(packetEncryptor.Flags);
writer.WriteDword((UInt32)tlvData.Length + 8u);
writer.WritePacketType(this.type);
writer.Write(tlvData);
packetData = packetStream.ToArray();
}
var xorKey = GenerateXorKey();
XorBytes(xorKey, ref packetData);
return(packetData);
}
public Packet(BinaryReader reader, PacketEncryptor packetEncryptor = null)
: this()
{
packetEncryptor = packetEncryptor ?? PacketEncryptor.Blank;
var header = reader.ReadBytes(HEADER_SIZE);
var packetBody = default(byte[]);
var xorKey = new byte[4];
Array.Copy(header, xorKey, xorKey.Length);
header.Xor(xorKey);
var encrypted = false;
var packetType = PacketType.Request;
using (var headerStream = new MemoryStream(header))
using (var headerReader = new BinaryReader(headerStream))
{
// Move to the encryption flags
headerReader.BaseStream.Seek(ENC_LENGTH, SeekOrigin.Begin);
var encFlags = headerReader.ReadDword();
var bytesToRead = headerReader.ReadDword() - 8;
packetType = headerReader.ReadPacketType();
packetBody = reader.ReadBytes((int)bytesToRead);
encrypted = encFlags == PacketEncryptor.ENC_AES256;
}
packetBody.Xor(xorKey);
if (encrypted)
{
// TODO: if we don't have a packet encryptor, then we should probably
// bail out.
packetBody = packetEncryptor.AesDecrypt(packetBody);
}
ParseData(packetType, ref packetBody);
}
public byte[] ToRaw(Guid sessionGuid, PacketEncryptor packetEncryptor = null)
{
return(this.ToRaw(sessionGuid.ToByteArray(), packetEncryptor));
}
