private void UpdateClient()
{
while (Client.DataAvailable)
{
var packet = ClientStream.ReadPacket(Craft.Net.PacketDirection.Serverbound);
Log.LogPacket(packet, true);
if (packet is EncryptionKeyResponsePacket)
{
if (!FinializeClientEncryption((EncryptionKeyResponsePacket)packet))
{
if (ConnectionClosed != null)
{
ConnectionClosed(this, null);
}
Worker.Abort();
return;
}
}
else
{
var eventArgs = new IncomingPacketEventArgs(packet, true);
if (IncomingPacket != null)
{
IncomingPacket(this, eventArgs);
}
lock (Server)
{
if (!eventArgs.Handled)
{
ServerStream.WritePacket(packet, Craft.Net.PacketDirection.Serverbound);
}
// We use a BufferedStream to make sure packets get sent in one piece, rather than
// a field at a time. Flushing it here sends the assembled packet.
Server.Flush();
}
if (packet is DisconnectPacket)
{
Console.WriteLine("Client disconnected: " + ((DisconnectPacket)packet).Reason);
if (ConnectionClosed != null)
{
ConnectionClosed(this, null);
}
Worker.Abort();
}
}
}
}
private bool FinializeClientEncryption(EncryptionKeyResponsePacket encryptionKeyResponsePacket)
{
// Here, we need to prepare everything to enable client<->proxy
// encryption, but we can't turn it on quite yet.
if (Settings.AuthenticateClients)
{
// Do authentication
// Create a hash for session verification
AsnKeyBuilder.AsnMessage encodedKey = AsnKeyBuilder.PublicKeyToX509(ServerKey);
byte[] shaData = Encoding.UTF8.GetBytes(ClientAuthenticationHash)
.Concat(ClientSharedKey)
.Concat(encodedKey.GetBytes()).ToArray();
string hash = Cryptography.JavaHexDigest(shaData);
var client = new WebClient();
var result = client.DownloadString(string.Format("http://session.minecraft.net/game/checkserver.jsp?user={0}&serverId={1}",
PlayerName, hash));
if (result != "YES")
{
Log.Write("Failed to authenticate " + PlayerName + "!");
ServerStream.WritePacket(new DisconnectPacket("Failed to authenticate!"), Craft.Net.PacketDirection.Serverbound);
ClientStream.WritePacket(new DisconnectPacket("Failed to authenticate!"), Craft.Net.PacketDirection.Clientbound);
Server.Flush();
Client.Flush();
return(false);
}
}
// Send unencrypted response
ServerStream.WritePacket(ServerEncryptionResponse, Craft.Net.PacketDirection.Serverbound);
Server.Flush();
// We wait for the server to respond, then set up encryption
// for both sides of the connection.
ServerStream.BaseStream = new AesStream(Server, ServerSharedKey);
return(true);
}