mirror of
https://github.com/MCCTeam/Minecraft-Console-Client
synced 2025-10-14 21:22:49 +00:00
771 lines
29 KiB
C#
771 lines
29 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Net.Sockets;
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using System.Threading;
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using MinecraftClient.Crypto;
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using MinecraftClient.Proxy;
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using System.Security.Cryptography;
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namespace MinecraftClient.Protocol.Handlers
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{
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/// <summary>
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/// Implementation for Minecraft 1.7.X and 1.8.X Protocols
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/// </summary>
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class Protocol18Handler : IMinecraftCom
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{
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private const int MC18Version = 47;
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private int compression_treshold = 0;
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private bool autocomplete_received = false;
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private string autocomplete_result = "";
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private bool login_phase = true;
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private bool encrypted = false;
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private int protocolversion;
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IMinecraftComHandler handler;
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Thread netRead;
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IAesStream s;
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TcpClient c;
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public Protocol18Handler(TcpClient Client, int ProtocolVersion, IMinecraftComHandler Handler)
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{
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ConsoleIO.SetAutoCompleteEngine(this);
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ChatParser.InitTranslations();
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this.c = Client;
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this.protocolversion = ProtocolVersion;
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this.handler = Handler;
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}
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private Protocol18Handler(TcpClient Client)
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{
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this.c = Client;
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}
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/// <summary>
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/// Separate thread. Network reading loop.
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/// </summary>
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private void Updater()
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{
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try
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{
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do
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{
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Thread.Sleep(100);
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}
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while (Update());
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}
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catch (System.IO.IOException) { }
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catch (SocketException) { }
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catch (ObjectDisposedException) { }
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handler.OnConnectionLost(ChatBot.DisconnectReason.ConnectionLost, "");
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}
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/// <summary>
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/// Read data from the network. Should be called on a separate thread.
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/// </summary>
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/// <returns></returns>
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private bool Update()
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{
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handler.OnUpdate();
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if (c.Client == null || !c.Connected) { return false; }
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try
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{
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while (c.Client.Available > 0)
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{
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int packetID = 0;
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byte[] packetData = new byte[] { };
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readNextPacket(ref packetID, ref packetData);
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handlePacket(packetID, packetData);
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}
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}
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catch (SocketException) { return false; }
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return true;
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}
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/// <summary>
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/// Read the next packet from the network
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/// </summary>
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/// <param name="packetID">will contain packet ID</param>
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/// <param name="packetData">will contain raw packet Data</param>
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private void readNextPacket(ref int packetID, ref byte[] packetData)
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{
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int size = readNextVarIntRAW(); //Packet size
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packetData = readDataRAW(size); //Packet contents
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//Handle packet decompression
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if (protocolversion >= MC18Version
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&& compression_treshold > 0)
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{
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int size_uncompressed = readNextVarInt(ref packetData);
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if (size_uncompressed != 0) // != 0 means compressed, let's decompress
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packetData = ZlibUtils.Decompress(packetData, size_uncompressed);
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}
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packetID = readNextVarInt(ref packetData); //Packet ID
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}
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/// <summary>
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/// Handle the given packet
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/// </summary>
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/// <param name="packetID">Packet ID</param>
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/// <param name="packetData">Packet contents</param>
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/// <returns>TRUE if the packet was processed, FALSE if ignored or unknown</returns>
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private bool handlePacket(int packetID, byte[] packetData)
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{
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if (login_phase)
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{
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switch (packetID) //Packet IDs are different while logging in
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{
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case 0x03:
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if (protocolversion >= MC18Version)
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compression_treshold = readNextVarInt(ref packetData);
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break;
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default:
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return false; //Ignored packet
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}
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}
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else //Regular in-game packets
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{
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switch (packetID)
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{
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case 0x00: //Keep-Alive
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SendPacket(0x00, packetData);
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break;
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case 0x01: //Join game
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SendBrandInfo();
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break;
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case 0x02: //Chat message
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handler.OnTextReceived(ChatParser.ParseText(readNextString(ref packetData)));
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break;
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case 0x38: //Player List update
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if (protocolversion >= MC18Version)
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{
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int action = readNextVarInt(ref packetData);
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int numActions = readNextVarInt(ref packetData);
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for (int i = 0; i < numActions; i++)
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{
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Guid uuid = readNextUUID(ref packetData);
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switch (action)
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{
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case 0x00: //Player Join
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string name = readNextString(ref packetData);
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handler.OnPlayerJoin(uuid, name);
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break;
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case 0x04: //Player Leave
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handler.OnPlayerLeave(uuid);
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break;
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default:
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//Unknown player list item type
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break;
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}
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}
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}
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else //MC 1.7.X does not provide UUID in tab-list updates
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{
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string name = readNextString(ref packetData);
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bool online = readNextBool(ref packetData);
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short ping = readNextShort(ref packetData);
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Guid FakeUUID = new Guid(MD5.Create().ComputeHash(Encoding.UTF8.GetBytes(name)).Take(16).ToArray());
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if (online)
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handler.OnPlayerJoin(FakeUUID, name);
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else handler.OnPlayerLeave(FakeUUID);
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}
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break;
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case 0x3A: //Tab-Complete Result
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int autocomplete_count = readNextVarInt(ref packetData);
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string tab_list = "";
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for (int i = 0; i < autocomplete_count; i++)
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{
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autocomplete_result = readNextString(ref packetData);
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if (autocomplete_result != "")
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tab_list = tab_list + autocomplete_result + " ";
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}
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autocomplete_received = true;
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tab_list = tab_list.Trim();
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if (tab_list.Length > 0)
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ConsoleIO.WriteLineFormatted("§8" + tab_list, false);
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break;
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case 0x40: //Kick Packet
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handler.OnConnectionLost(ChatBot.DisconnectReason.InGameKick, ChatParser.ParseText(readNextString(ref packetData)));
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return false;
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case 0x46: //Network Compression Treshold Info
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if (protocolversion >= MC18Version)
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compression_treshold = readNextVarInt(ref packetData);
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break;
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case 0x48: //Resource Pack Send
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string url = readNextString(ref packetData);
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string hash = readNextString(ref packetData);
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//Send back "accepted" and "successfully loaded" responses for plugins making use of resource pack mandatory
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SendPacket(0x19, concatBytes(getVarInt(hash.Length), Encoding.UTF8.GetBytes(hash), getVarInt(3)));
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SendPacket(0x19, concatBytes(getVarInt(hash.Length), Encoding.UTF8.GetBytes(hash), getVarInt(0)));
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break;
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default:
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return false; //Ignored packet
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}
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}
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return true; //Packet processed
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}
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/// <summary>
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/// Start the updating thread. Should be called after login success.
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/// </summary>
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private void StartUpdating()
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{
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netRead = new Thread(new ThreadStart(Updater));
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netRead.Name = "ProtocolPacketHandler";
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netRead.Start();
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}
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/// <summary>
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/// Disconnect from the server, cancel network reading.
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/// </summary>
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public void Dispose()
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{
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try
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{
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if (netRead != null)
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{
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netRead.Abort();
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c.Close();
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}
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}
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catch { }
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}
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/// <summary>
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/// Read some data directly from the network
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/// </summary>
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/// <param name="offset">Amount of bytes to read</param>
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/// <returns>The data read from the network as an array</returns>
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private byte[] readDataRAW(int offset)
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{
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if (offset > 0)
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{
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try
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{
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byte[] cache = new byte[offset];
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Receive(cache, 0, offset, SocketFlags.None);
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return cache;
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}
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catch (OutOfMemoryException) { }
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}
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return new byte[] { };
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}
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/// <summary>
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/// Read some data from a cache of bytes and remove it from the cache
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/// </summary>
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/// <param name="offset">Amount of bytes to read</param>
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/// <param name="cache">Cache of bytes to read from</param>
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/// <returns>The data read from the cache as an array</returns>
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private static byte[] readData(int offset, ref byte[] cache)
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{
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byte[] result = cache.Take(offset).ToArray();
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cache = cache.Skip(offset).ToArray();
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return result;
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}
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/// <summary>
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/// Read a string from a cache of bytes and remove it from the cache
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/// </summary>
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/// <param name="cache">Cache of bytes to read from</param>
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/// <returns>The string</returns>
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private static string readNextString(ref byte[] cache)
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{
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int length = readNextVarInt(ref cache);
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if (length > 0)
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{
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return Encoding.UTF8.GetString(readData(length, ref cache));
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}
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else return "";
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}
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/// <summary>
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/// Read a boolean from a cache of bytes and remove it from the cache
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/// </summary>
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/// <returns>The boolean value</returns>
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private static bool readNextBool(ref byte[] cache)
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{
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return readData(1, ref cache)[0] != 0x00;
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}
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/// <summary>
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/// Read a short integer from a cache of bytes and remove it from the cache
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/// </summary>
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/// <returns>The short integer value</returns>
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private static short readNextShort(ref byte[] cache)
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{
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byte[] rawValue = readData(2, ref cache);
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Array.Reverse(rawValue); //Endianness
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return BitConverter.ToInt16(rawValue, 0);
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}
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/// <summary>
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/// Read a uuid from a cache of bytes and remove it from the cache
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/// </summary>
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/// <param name="cache">Cache of bytes to read from</param>
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/// <returns>The uuid</returns>
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private static Guid readNextUUID(ref byte[] cache)
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{
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return new Guid(readData(16, ref cache));
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}
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/// <summary>
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/// Read a byte array from a cache of bytes and remove it from the cache
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/// </summary>
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/// <param name="cache">Cache of bytes to read from</param>
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/// <returns>The byte array</returns>
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private byte[] readNextByteArray(ref byte[] cache)
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{
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int len = protocolversion >= MC18Version
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? readNextVarInt(ref cache)
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: readNextShort(ref cache);
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return readData(len, ref cache);
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}
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/// <summary>
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/// Read an integer from the network
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/// </summary>
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/// <returns>The integer</returns>
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private int readNextVarIntRAW()
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{
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int i = 0;
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int j = 0;
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int k = 0;
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byte[] tmp = new byte[1];
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while (true)
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{
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Receive(tmp, 0, 1, SocketFlags.None);
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k = tmp[0];
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i |= (k & 0x7F) << j++ * 7;
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if (j > 5) throw new OverflowException("VarInt too big");
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if ((k & 0x80) != 128) break;
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}
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return i;
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}
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/// <summary>
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/// Read an integer from a cache of bytes and remove it from the cache
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/// </summary>
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/// <param name="cache">Cache of bytes to read from</param>
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/// <returns>The integer</returns>
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private static int readNextVarInt(ref byte[] cache)
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{
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int i = 0;
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int j = 0;
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int k = 0;
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byte[] tmp = new byte[1];
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while (true)
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{
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tmp = readData(1, ref cache);
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k = tmp[0];
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i |= (k & 0x7F) << j++ * 7;
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if (j > 5) throw new OverflowException("VarInt too big");
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if ((k & 0x80) != 128) break;
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}
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return i;
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}
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/// <summary>
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/// Build an integer for sending over the network
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/// </summary>
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/// <param name="paramInt">Integer to encode</param>
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/// <returns>Byte array for this integer</returns>
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private static byte[] getVarInt(int paramInt)
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{
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List<byte> bytes = new List<byte>();
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while ((paramInt & -128) != 0)
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{
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bytes.Add((byte)(paramInt & 127 | 128));
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paramInt = (int)(((uint)paramInt) >> 7);
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}
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bytes.Add((byte)paramInt);
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return bytes.ToArray();
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}
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/// <summary>
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/// Get byte array with length information prepended to it
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/// </summary>
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/// <param name="array">Array to process</param>
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/// <returns>Array ready to send</returns>
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private byte[] getArray(byte[] array)
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{
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if (protocolversion < MC18Version)
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{
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byte[] length = BitConverter.GetBytes((short)array.Length);
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Array.Reverse(length);
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return concatBytes(length, array);
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}
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else return concatBytes(getVarInt(array.Length), array);
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}
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/// <summary>
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/// Easily append several byte arrays
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/// </summary>
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/// <param name="bytes">Bytes to append</param>
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/// <returns>Array containing all the data</returns>
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private static byte[] concatBytes(params byte[][] bytes)
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{
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List<byte> result = new List<byte>();
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foreach (byte[] array in bytes)
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result.AddRange(array);
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return result.ToArray();
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}
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/// <summary>
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/// C-like atoi function for parsing an int from string
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/// </summary>
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/// <param name="str">String to parse</param>
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/// <returns>Int parsed</returns>
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private static int atoi(string str)
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{
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return int.Parse(new string(str.Trim().TakeWhile(char.IsDigit).ToArray()));
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}
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/// <summary>
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/// Network reading method. Read bytes from the socket or encrypted socket.
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/// </summary>
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private void Receive(byte[] buffer, int start, int offset, SocketFlags f)
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{
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int read = 0;
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while (read < offset)
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{
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if (encrypted)
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{
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read += s.Read(buffer, start + read, offset - read);
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}
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else read += c.Client.Receive(buffer, start + read, offset - read, f);
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}
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}
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/// <summary>
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/// Send a packet to the server, compression and encryption will be handled automatically
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/// </summary>
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/// <param name="packetID">packet ID</param>
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/// <param name="packetData">packet Data</param>
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private void SendPacket(int packetID, byte[] packetData)
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{
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//The inner packet
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byte[] the_packet = concatBytes(getVarInt(packetID), packetData);
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if (compression_treshold > 0) //Compression enabled?
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{
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if (the_packet.Length > compression_treshold) //Packet long enough for compressing?
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{
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byte[] uncompressed_length = getVarInt(the_packet.Length);
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byte[] compressed_packet = ZlibUtils.Compress(the_packet);
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byte[] compressed_packet_length = getVarInt(compressed_packet.Length);
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the_packet = concatBytes(compressed_packet_length, compressed_packet);
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}
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else
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{
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byte[] uncompressed_length = getVarInt(0); //Not compressed (short packet)
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the_packet = concatBytes(uncompressed_length, the_packet);
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}
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}
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SendRAW(concatBytes(getVarInt(the_packet.Length), the_packet));
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}
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/// <summary>
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/// Send raw data to the server. Encryption will be handled automatically.
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/// </summary>
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/// <param name="buffer">data to send</param>
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private void SendRAW(byte[] buffer)
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{
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if (encrypted)
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{
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s.Write(buffer, 0, buffer.Length);
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}
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else c.Client.Send(buffer);
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}
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/// <summary>
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/// Do the Minecraft login.
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/// </summary>
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/// <returns>True if login successful</returns>
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public bool Login()
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{
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byte[] protocol_version = getVarInt(protocolversion);
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byte[] server_adress_val = Encoding.UTF8.GetBytes(handler.GetServerHost());
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byte[] server_adress_len = getVarInt(server_adress_val.Length);
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byte[] server_port = BitConverter.GetBytes((ushort)handler.GetServerPort()); Array.Reverse(server_port);
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byte[] next_state = getVarInt(2);
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byte[] handshake_packet = concatBytes(protocol_version, server_adress_len, server_adress_val, server_port, next_state);
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SendPacket(0x00, handshake_packet);
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byte[] username_val = Encoding.UTF8.GetBytes(handler.GetUsername());
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byte[] username_len = getVarInt(username_val.Length);
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byte[] login_packet = concatBytes(username_len, username_val);
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SendPacket(0x00, login_packet);
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int packetID = -1;
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byte[] packetData = new byte[] { };
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while (true)
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{
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readNextPacket(ref packetID, ref packetData);
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if (packetID == 0x00) //Login rejected
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{
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handler.OnConnectionLost(ChatBot.DisconnectReason.LoginRejected, ChatParser.ParseText(readNextString(ref packetData)));
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return false;
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}
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else if (packetID == 0x01) //Encryption request
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{
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string serverID = readNextString(ref packetData);
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byte[] Serverkey = readNextByteArray(ref packetData);
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byte[] token = readNextByteArray(ref packetData);
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return StartEncryption(handler.GetUserUUID(), handler.GetSessionID(), token, serverID, Serverkey);
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}
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else if (packetID == 0x02) //Login successful
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{
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ConsoleIO.WriteLineFormatted("§8Server is in offline mode.");
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login_phase = false;
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StartUpdating();
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return true; //No need to check session or start encryption
|
|
}
|
|
else handlePacket(packetID, packetData);
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Start network encryption. Automatically called by Login() if the server requests encryption.
|
|
/// </summary>
|
|
/// <returns>True if encryption was successful</returns>
|
|
|
|
private bool StartEncryption(string uuid, string sessionID, byte[] token, string serverIDhash, byte[] serverKey)
|
|
{
|
|
System.Security.Cryptography.RSACryptoServiceProvider RSAService = CryptoHandler.DecodeRSAPublicKey(serverKey);
|
|
byte[] secretKey = CryptoHandler.GenerateAESPrivateKey();
|
|
|
|
ConsoleIO.WriteLineFormatted("§8Crypto keys & hash generated.");
|
|
|
|
if (serverIDhash != "-")
|
|
{
|
|
Console.WriteLine("Checking Session...");
|
|
if (!ProtocolHandler.SessionCheck(uuid, sessionID, CryptoHandler.getServerHash(serverIDhash, serverKey, secretKey)))
|
|
{
|
|
handler.OnConnectionLost(ChatBot.DisconnectReason.LoginRejected, "Failed to check session.");
|
|
return false;
|
|
}
|
|
}
|
|
|
|
//Encrypt the data
|
|
byte[] key_enc = getArray(RSAService.Encrypt(secretKey, false));
|
|
byte[] token_enc = getArray(RSAService.Encrypt(token, false));
|
|
|
|
//Encryption Response packet
|
|
SendPacket(0x01, concatBytes(key_enc, token_enc));
|
|
|
|
//Start client-side encryption
|
|
s = CryptoHandler.getAesStream(c.GetStream(), secretKey);
|
|
encrypted = true;
|
|
|
|
//Process the next packet
|
|
int packetID = -1;
|
|
byte[] packetData = new byte[] { };
|
|
while (true)
|
|
{
|
|
readNextPacket(ref packetID, ref packetData);
|
|
if (packetID == 0x00) //Login rejected
|
|
{
|
|
handler.OnConnectionLost(ChatBot.DisconnectReason.LoginRejected, ChatParser.ParseText(readNextString(ref packetData)));
|
|
return false;
|
|
}
|
|
else if (packetID == 0x02) //Login successful
|
|
{
|
|
login_phase = false;
|
|
StartUpdating();
|
|
return true;
|
|
}
|
|
else handlePacket(packetID, packetData);
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Sends information about the client version.
|
|
/// </summary>
|
|
|
|
private void SendBrandInfo()
|
|
{
|
|
byte[] channel = Encoding.UTF8.GetBytes("MC|Brand");
|
|
byte[] channelLen = getVarInt(channel.Length);
|
|
byte[] brand = Encoding.UTF8.GetBytes("Minecraft Console Client v" + Program.Version);
|
|
byte[] brandLen = getVarInt(brand.Length);
|
|
|
|
SendPacket(0x17, concatBytes(channelLen, channel, brandLen, brand));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Send a chat message to the server
|
|
/// </summary>
|
|
/// <param name="message">Message</param>
|
|
/// <returns>True if properly sent</returns>
|
|
|
|
public bool SendChatMessage(string message)
|
|
{
|
|
if (String.IsNullOrEmpty(message))
|
|
return true;
|
|
try
|
|
{
|
|
byte[] message_val = Encoding.UTF8.GetBytes(message);
|
|
byte[] message_len = getVarInt(message_val.Length);
|
|
byte[] message_packet = concatBytes(message_len, message_val);
|
|
SendPacket(0x01, message_packet);
|
|
return true;
|
|
}
|
|
catch (SocketException) { return false; }
|
|
catch (System.IO.IOException) { return false; }
|
|
}
|
|
|
|
/// <summary>
|
|
/// Send a respawn packet to the server
|
|
/// </summary>
|
|
/// <param name="message">Message</param>
|
|
/// <returns>True if properly sent</returns>
|
|
|
|
public bool SendRespawnPacket()
|
|
{
|
|
try
|
|
{
|
|
SendPacket(0x16, new byte[] { 0 });
|
|
return true;
|
|
}
|
|
catch (SocketException) { return false; }
|
|
}
|
|
|
|
/// <summary>
|
|
/// Disconnect from the server
|
|
/// </summary>
|
|
|
|
public void Disconnect()
|
|
{
|
|
try
|
|
{
|
|
c.Close();
|
|
}
|
|
catch (SocketException) { }
|
|
catch (System.IO.IOException) { }
|
|
catch (NullReferenceException) { }
|
|
catch (ObjectDisposedException) { }
|
|
}
|
|
|
|
/// <summary>
|
|
/// Autocomplete text while typing username or command
|
|
/// </summary>
|
|
/// <param name="BehindCursor">Text behind cursor</param>
|
|
/// <returns>Completed text</returns>
|
|
|
|
public string AutoComplete(string BehindCursor)
|
|
{
|
|
if (String.IsNullOrEmpty(BehindCursor))
|
|
return "";
|
|
|
|
byte[] tocomplete_val = Encoding.UTF8.GetBytes(BehindCursor);
|
|
byte[] tocomplete_len = getVarInt(tocomplete_val.Length);
|
|
byte[] has_position = new byte[] { 0x00 };
|
|
byte[] tabcomplete_packet = protocolversion >= MC18Version
|
|
? concatBytes(tocomplete_len, tocomplete_val, has_position)
|
|
: concatBytes(tocomplete_len, tocomplete_val);
|
|
|
|
autocomplete_received = false;
|
|
autocomplete_result = BehindCursor;
|
|
SendPacket(0x14, tabcomplete_packet);
|
|
|
|
int wait_left = 50; //do not wait more than 5 seconds (50 * 100 ms)
|
|
while (wait_left > 0 && !autocomplete_received) { System.Threading.Thread.Sleep(100); wait_left--; }
|
|
return autocomplete_result;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Ping a Minecraft server to get information about the server
|
|
/// </summary>
|
|
/// <returns>True if ping was successful</returns>
|
|
|
|
public static bool doPing(string host, int port, ref int protocolversion)
|
|
{
|
|
string version = "";
|
|
TcpClient tcp = ProxyHandler.newTcpClient(host, port);
|
|
tcp.ReceiveBufferSize = 1024 * 1024;
|
|
|
|
byte[] packet_id = getVarInt(0);
|
|
byte[] protocol_version = getVarInt(4);
|
|
byte[] server_adress_val = Encoding.UTF8.GetBytes(host);
|
|
byte[] server_adress_len = getVarInt(server_adress_val.Length);
|
|
byte[] server_port = BitConverter.GetBytes((ushort)port); Array.Reverse(server_port);
|
|
byte[] next_state = getVarInt(1);
|
|
byte[] packet = concatBytes(packet_id, protocol_version, server_adress_len, server_adress_val, server_port, next_state);
|
|
byte[] tosend = concatBytes(getVarInt(packet.Length), packet);
|
|
|
|
tcp.Client.Send(tosend, SocketFlags.None);
|
|
|
|
byte[] status_request = getVarInt(0);
|
|
byte[] request_packet = concatBytes(getVarInt(status_request.Length), status_request);
|
|
|
|
tcp.Client.Send(request_packet, SocketFlags.None);
|
|
|
|
Protocol18Handler ComTmp = new Protocol18Handler(tcp);
|
|
int packetLength = ComTmp.readNextVarIntRAW();
|
|
if (packetLength > 0) //Read Response length
|
|
{
|
|
byte[] packetData = ComTmp.readDataRAW(packetLength);
|
|
if (readNextVarInt(ref packetData) == 0x00) //Read Packet ID
|
|
{
|
|
string result = readNextString(ref packetData); //Get the Json data
|
|
if (!String.IsNullOrEmpty(result) && result.StartsWith("{") && result.EndsWith("}"))
|
|
{
|
|
Json.JSONData jsonData = Json.ParseJson(result);
|
|
if (jsonData.Type == Json.JSONData.DataType.Object && jsonData.Properties.ContainsKey("version"))
|
|
{
|
|
jsonData = jsonData.Properties["version"];
|
|
|
|
//Retrieve display name of the Minecraft version
|
|
if (jsonData.Properties.ContainsKey("name"))
|
|
version = jsonData.Properties["name"].StringValue;
|
|
|
|
//Retrieve protocol version number for handling this server
|
|
if (jsonData.Properties.ContainsKey("protocol"))
|
|
protocolversion = atoi(jsonData.Properties["protocol"].StringValue);
|
|
|
|
//Automatic fix for BungeeCord 1.8 reporting itself as 1.7...
|
|
if (protocolversion < 47 && version.Split(' ', '/').Contains("1.8"))
|
|
protocolversion = ProtocolHandler.MCVer2ProtocolVersion("1.8.0");
|
|
|
|
ConsoleIO.WriteLineFormatted("§8Server version : " + version + " (protocol v" + protocolversion + ").");
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
}
|