public static void ReceiveClientSettings(Player player, GameStream stream)
{
string locale = stream.ReadString();
byte viewDistance = stream.ReadByte();
ChatMode chatMode = (ChatMode)(int)stream.ReadVarInt().Value;
bool colors = stream.ReadBoolean();
byte skinParts = stream.ReadByte();
VarInt mainHand = stream.ReadVarInt();
player.Locale = locale;
player.ViewDistance = viewDistance;
player.ChatMode = chatMode;
player.ColorsEnabled = colors;
foreach (SkinPart part in SkinParts)
{
if (skinParts.IsBitSet(part))
{
player.DisplayedSkinParts.Add(part);
}
}
player.MainHand.Value = mainHand;
SendPlayerSlot(player, stream, player.Slot);
// TODO - Declare Recipes
// TODO - Set Tags
// TODO - Set Entity Statuses
}
public void Receive(ref MinecraftClient client, GameStream stream)
{
VarInt secretLength = stream.ReadVarInt();
byte[] sharedSecret = stream.ReadByteArray((int)secretLength.Value);
VarInt tokenLength = stream.ReadVarInt();
byte[] verifyToken = stream.ReadByteArray((int)tokenLength.Value);
var decryptedToken = Protocol.CryptoProvider.Decrypt(verifyToken, false);
for (int i = 0; i < decryptedToken.Length; i++)
{
if (decryptedToken[i] != client.VerifyToken[i])
{
client.Disconnect("Unable to authenticate");
return;
}
}
client.SharedToken = Protocol.CryptoProvider.Decrypt(sharedSecret, false);
AsnKeyBuilder.AsnMessage encodedKey = AsnKeyBuilder.PublicKeyToX509(Protocol.Key);
byte[] shaData = Encoding.UTF8.GetBytes(Protocol.ServerID)
.Concat(client.SharedToken)
.Concat(encodedKey.GetBytes()).ToArray();
string hash = Cryptography.JavaHexDigest(shaData);
WebClient webClient = new();
StreamReader webReader = new(webClient.OpenRead(
new Uri(string.Format(SessionChecker, client.Player.Username, hash))
));
string response = webReader.ReadToEnd();
webReader.Close();
JToken json = JToken.Parse(response);
if (string.IsNullOrEmpty(response))
{
client.Disconnect("Failed to verify username");
return;
}
client.Stream = new(new AesStream(client.Stream.BaseStream, client.SharedToken));
string?uuid = json["id"] !.Value <string>();
if (uuid != client.Player.UniqueId.toString().Remove('-'))
{
client.Disconnect("Failed to verify UniqueID");
return;
}
client.EncryptionPassed = true;
new LoginSuccess(true).Send(ref client, client.Stream);
}
public static void ReceiveEncryptionResponse(Player player, GameStream stream)
{
VarInt secretLength = stream.ReadVarInt();
byte[] sharedSecret = stream.ReadByteArray((int)secretLength.Value);
VarInt tokenLength = stream.ReadVarInt();
byte[] verifyToken = stream.ReadByteArray((int)tokenLength.Value);
var decryptedToken = Server.CryptoServerProvider.Decrypt(verifyToken, false);
for (int i = 0; i < decryptedToken.Length; i++)
{
if (decryptedToken[i] != player.Stream.VerifyToken[i])
{
Disconnect(player, stream, "Unable to authenticate");
}
}
player.SharedToken = Server.CryptoServerProvider.Decrypt(sharedSecret, false);
AsnKeyBuilder.AsnMessage encodedKey = AsnKeyBuilder.PublicKeyToX509(Server.ServerKey);
byte[] shaData = Encoding.UTF8.GetBytes(Server.ID)
.Concat(player.SharedToken)
.Concat(encodedKey.GetBytes()).ToArray();
string hash = Cryptography.JavaHexDigest(shaData);
WebClient webCLient = new WebClient();
StreamReader webReader = new StreamReader(webCLient.OpenRead(
new Uri(string.Format(SessionChecker, player.Username, hash))
));
string response = webReader.ReadToEnd();
webReader.Close();
JToken json = JToken.Parse(response);
if (string.IsNullOrEmpty(response))
{
Disconnect(player, stream, "Failed to verify username");
}
player.Stream = new GameStream(new AesStream(player.Stream.BaseStream, player.SharedToken));
player.UUID = json["id"].Value <string>();
player.EncryptionEnabled = true;
SendSuccess(player, player.Stream);
}
public void Receive(ref MinecraftClient client, GameStream stream)
{
VarInt protocolVersion = stream.ReadVarInt();
string serverAddress = stream.ReadString();
ushort port = stream.ReadShort();
VarInt nextState = stream.ReadVarInt();
if (nextState == 1)
{
client.State = ConnectionState.Status;
}
else if (nextState == 2)
{
client.State = ConnectionState.Login;
}
else
{
throw new Exception("Invalid Next State - Handshake");
}
}
private static void Run()
{
IPAddress ip = IPAddress.Parse("0.0.0.0");
int port = 25565;
TcpListener server = new TcpListener(ip, port);
Logger.Write("Starting the server on " + ip + ":" + port);
try
{
server.Start();
Logger.Write("Now accepting connections.");
while (true)
{
if (!server.Pending())
{
continue;
}
Thread tmpThread = new Thread(() =>
{
Player client = new Player(server.AcceptTcpClient());
using (NetworkStream ns = client.Client.GetStream())
{
GameStream stream = new GameStream(ns)
{
State = SessionState.Handshaking
};
using (StreamReader sr = new StreamReader(stream))
{
while (true)
{
// Read packets here and transport them to their appropiate places
VarInt length = stream.ReadVarInt();
MemoryStream ms = new MemoryStream(stream.ReadByteArray((int)length.Value));
Protocol.Receive(client, new GameStream(ms));
}
}
}
});
tmpThread.Start();
}
}
catch (Exception e)
{
Logger.Write("Error!");
Logger.Write(e.ToString());
}
}
public static void ReceiveHandshake(Player client, GameStream stream)
{
VarInt protocolVersion = stream.ReadVarInt();
string serverAddress = stream.ReadString();
ushort port = stream.ReadShort();
VarInt next = stream.ReadVarInt();
if (!CheckHandshakeInfo(protocolVersion, serverAddress, port, next))
{
return;
}
switch ((int)next.Value)
{
case 1: // Status
client.State = SessionState.Status;
StatusPackets.SendStatus(client, stream);
break;
case 2: // Login
client.State = SessionState.Login;
break;
}
}
