public void DecryptServer()
{
Form1.UpdateBlinkingText("Stage Five Decoding");
List <byte[]> packets = new List <byte[]>();
int k = 0;
int t = 0;
int lnk = 0;
byte[] d1 = ConvertDictionary(this.ServerConversation);
while (t < d1.Length)
{
//Form1.WriteLine(string.Format("DEBUG: t = {0} and D1.Length = {1}.", t, d1.Length));
lnk = BitConverter.ToInt32(d1, t);
lnk += 4;
byte[] bx = new byte[lnk];
Array.Copy(d1, t + 4, bx, 0, lnk);
t += lnk + 4;
if (k == 0)
{
uc = new cryption(bx);
uc.decript(bx, 0x19);
}
else
{
uc.data = bx;
uc.decript();
}
// Get the length -4
Int32 length = uc.data.Length - 4;
byte[] p_len = BitConverter.GetBytes(length);
byte[] fullPacket = new byte[p_len.Length + uc.data.Length];
Array.Copy(p_len, fullPacket, p_len.Length);
Array.Copy(uc.data, 0, fullPacket, 4, uc.data.Length);
// We have the decoded packets now, so we need to put them back in order
// that way i can see how the client answers.
packets.Add(fullPacket);
WritePaket(fullPacket, PacketOrigin.Server);
//rt_op.AppendText(FormatBytes(fullPacket));//.Text += FormatBytes(fullPacket);//(uc.data) + "\n";//ByteArrayToHexString(uc.data) + "\n";
//rt_op.SelectionColor = Color.Red;
//rt_op.AppendText(NiceHexOutput(fullPacket));
k++;
}
//BuildServerDecodeDic(packets);
Form1.UpdateBlinkingText("Completed");
Form1.BlinkLabel(false);
}
public void DecodePacket(byte[] packet, PacketOrigin origin)
{
int p_len = 0;
int crc = 0;
if (origin == PacketOrigin.Client)
{
if (this.ClientPacketsParsed == 0)
{
this.ClientKey = Tools.GlobalFunctions.GetKeyFromKnownPacketID(packet, 14);
byte[] toXor = Tools.GlobalFunctions.GetPortionsToXOR(packet, out p_len, out crc, true);
byte[] xored = Xor.decrypt(toXor, this.ClientKey);
byte[] len = BitConverter.GetBytes(p_len);
byte[] full = new byte[len.Length + toXor.Length + 8];
Array.Copy(len, full, len.Length);
Array.Copy(BitConverter.GetBytes(14), 0, full, 4, BitConverter.GetBytes(14).Length);
Array.Copy(xored, 0, full, 8, xored.Length);
WritePaket(full, PacketOrigin.Client);
}
else if (this.ClientKey != null)
{
byte[] toXor = Tools.GlobalFunctions.GetPortionsToXOR(packet, out p_len, out crc);
byte[] len = BitConverter.GetBytes(p_len);
byte[] xor = Xor.decrypt(toXor, this.ClientKey);
byte[] full = new byte[len.Length + toXor.Length + 4];
Array.Copy(len, full, len.Length);
Array.Copy(xor, 0, full, 4, xor.Length);
WritePaket(full, PacketOrigin.Client);
//WritePaket(packet, origin);
}
this.ClientPacketsParsed++;
}
else if (origin == PacketOrigin.Server)
{
if (this.ServerPacketsParsed == 1)
{
byte[] p1 = new byte[32];
// Get the last 32 bytes
Array.Copy(packet, (packet.Length - 32), p1, 0, p1.Length);
// This is our server decode packet
//int k = 0;
int t = 0;
int lnk = 0;
#region While
while (t < p1.Length)
{
lnk = BitConverter.ToInt32(p1, t);
lnk += 4;
bx = new byte[lnk];
Array.Copy(p1, t + 4, bx, 0, lnk);
t += lnk + 4;
//if (k == 0)
//{
this.uc = new cryption(bx);
uc.decript(bx, 0x19);
//}
//else
// {
// }
// Get the length -4
Int32 length = uc.data.Length - 4;
byte[] p_len2 = BitConverter.GetBytes(length);
byte[] fullPacket = new byte[p_len2.Length + uc.data.Length];
Array.Copy(p_len2, fullPacket, p_len2.Length);
Array.Copy(uc.data, 0, fullPacket, 4, uc.data.Length);
WritePaket(fullPacket, PacketOrigin.Server);
//rt_op.AppendText(FormatBytes(fullPacket));//.Text += FormatBytes(fullPacket);//(uc.data) + "\n";//ByteArrayToHexString(uc.data) + "\n";
//rt_op.SelectionColor = Color.Red;
//rt_op.AppendText(NiceHexOutput(fullPacket));
}
#endregion
}
else if (this.ServerPacketsParsed >= 2)
{
//this.uc.data = packet;
// remove first 4
byte[] data = new byte[packet.Length - 4];
Array.Copy(packet, 4, data, 0, data.Length);
//int pos = this.uc.data.Length;
//Array.Resize(ref this.uc.data, this.uc.data.Length + packet.Length);
//Array.Copy(packet, 0, this.uc.data, pos, packet.Length);
//this.uc.data = packet;
this.uc.decript(data);
//Form1.WriteLine(string.Format("Length of this packet divisible by 4 ? {0}", packet.Length % 4 == 0));
WritePaket(this.uc.data, PacketOrigin.Server);
}
this.ServerPacketsParsed++;
}
}
