512 lines
26 KiB
C#
512 lines
26 KiB
C#
using Lidgren.Network;
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using Microsoft.Xna.Framework;
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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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namespace Barotrauma.Networking
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{
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class UnauthenticatedClient
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{
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public readonly NetConnection Connection;
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public readonly ulong SteamID;
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public Facepunch.Steamworks.ServerAuth.Status? SteamAuthStatus = null;
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public readonly int Nonce;
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public int FailedAttempts;
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public float AuthTimer;
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public UnauthenticatedClient(NetConnection connection, int nonce, ulong steamID = 0)
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{
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Connection = connection;
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SteamID = steamID;
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Nonce = nonce;
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AuthTimer = 10.0f;
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FailedAttempts = 0;
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}
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}
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partial class GameServer : NetworkMember
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{
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private Int32 ownerKey = 0;
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List<UnauthenticatedClient> unauthenticatedClients = new List<UnauthenticatedClient>();
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private void ReadClientSteamAuthRequest(NetIncomingMessage inc, NetConnection senderConnection, out ulong clientSteamID)
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{
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clientSteamID = 0;
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if (!Steam.SteamManager.USE_STEAM)
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{
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DebugConsole.Log("Received a Steam auth request from " + senderConnection.RemoteEndPoint + ". Steam authentication not required, handling auth normally.");
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//not using steam, handle auth normally
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HandleClientAuthRequest(senderConnection, 0);
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return;
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}
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if (senderConnection == OwnerConnection)
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{
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//the client is the owner of the server, no need for authentication
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//(it would fail with a "duplicate request" error anyway)
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HandleClientAuthRequest(senderConnection, 0);
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return;
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}
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clientSteamID = inc.ReadUInt64();
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int authTicketLength = inc.ReadInt32();
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inc.ReadBytes(authTicketLength, out byte[] authTicketData);
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DebugConsole.Log("Received a Steam auth request");
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DebugConsole.Log(" Steam ID: "+ clientSteamID);
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DebugConsole.Log(" Auth ticket length: " + authTicketLength);
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DebugConsole.Log(" Auth ticket data: " +
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((authTicketData == null) ? "null" : ToolBox.LimitString(string.Concat(authTicketData.Select(b => b.ToString("X2"))), 16)));
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if (senderConnection != OwnerConnection &&
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serverSettings.BanList.IsBanned(senderConnection.RemoteEndPoint.Address, clientSteamID))
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{
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return;
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}
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ulong steamID = clientSteamID;
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if (unauthenticatedClients.Any(uc => uc.Connection == inc.SenderConnection))
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{
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var steamAuthedClient = unauthenticatedClients.Find(uc =>
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uc.Connection == inc.SenderConnection &&
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uc.SteamID == steamID &&
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uc.SteamAuthStatus == Facepunch.Steamworks.ServerAuth.Status.OK);
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if (steamAuthedClient != null)
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{
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DebugConsole.Log("Client already authenticated, sending AUTH_RESPONSE again...");
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HandleClientAuthRequest(inc.SenderConnection, steamID);
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}
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DebugConsole.Log("Steam authentication already pending...");
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return;
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}
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if (authTicketData == null)
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{
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DebugConsole.Log("Invalid request");
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return;
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}
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unauthenticatedClients.RemoveAll(uc => uc.Connection == senderConnection);
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int nonce = CryptoRandom.Instance.Next();
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var unauthClient = new UnauthenticatedClient(senderConnection, nonce, clientSteamID)
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{
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AuthTimer = 20
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};
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unauthenticatedClients.Add(unauthClient);
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if (!Steam.SteamManager.StartAuthSession(authTicketData, clientSteamID))
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{
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unauthenticatedClients.Remove(unauthClient);
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if (GameMain.Config.RequireSteamAuthentication)
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{
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unauthClient.Connection.Disconnect(DisconnectReason.SteamAuthenticationFailed.ToString());
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Log("Disconnected unauthenticated client (Steam ID: " + steamID + "). Steam authentication failed.", ServerLog.MessageType.ServerMessage);
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}
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else
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{
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DebugConsole.Log("Steam authentication failed, skipping to basic auth...");
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HandleClientAuthRequest(senderConnection);
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return;
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}
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}
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return;
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}
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public void OnAuthChange(ulong steamID, ulong ownerID, Facepunch.Steamworks.ServerAuth.Status status)
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{
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DebugConsole.Log("************ OnAuthChange");
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DebugConsole.Log(" Steam ID: " + steamID);
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DebugConsole.Log(" Owner ID: " + ownerID);
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DebugConsole.Log(" Status: " + status);
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UnauthenticatedClient unauthClient = unauthenticatedClients.Find(uc => uc.SteamID == ownerID);
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if (unauthClient != null)
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{
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unauthClient.SteamAuthStatus = status;
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switch (status)
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{
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case Facepunch.Steamworks.ServerAuth.Status.OK:
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////steam authentication done, check password next
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Log("Successfully authenticated client via Steam (Steam ID: " + steamID + ").", ServerLog.MessageType.ServerMessage);
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HandleClientAuthRequest(unauthClient.Connection, unauthClient.SteamID);
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break;
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default:
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unauthenticatedClients.Remove(unauthClient);
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if (GameMain.Config.RequireSteamAuthentication)
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{
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Log("Disconnected unauthenticated client (Steam ID: " + steamID + "). Steam authentication failed, (" + status + ").", ServerLog.MessageType.ServerMessage);
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unauthClient.Connection.Disconnect(DisconnectReason.SteamAuthenticationFailed.ToString() + "/ (" + status.ToString() + ")");
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}
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else
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{
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DebugConsole.Log("Steam authentication failed (" + status.ToString() + "), skipping to basic auth...");
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HandleClientAuthRequest(unauthClient.Connection);
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return;
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}
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break;
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}
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return;
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}
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else
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{
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DebugConsole.Log(" No unauthenticated clients found with the Steam ID " + steamID);
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}
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//kick connected client if status becomes invalid (e.g. VAC banned, not connected to steam)
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/*if (status != Facepunch.Steamworks.ServerAuth.Status.OK && GameMain.Config.RequireSteamAuthentication)
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{
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var connectedClient = connectedClients.Find(c => c.SteamID == ownerID);
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if (connectedClient != null)
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{
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Log("Disconnecting client " + connectedClient.Name + " (Steam ID: " + steamID + "). Steam authentication no longer valid (" + status + ").", ServerLog.MessageType.ServerMessage);
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KickClient(connectedClient, $"DisconnectMessage.SteamAuthNoLongerValid~[status]={status.ToString()}");
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}
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}*/
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}
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private bool IsServerOwner(NetIncomingMessage inc, NetConnection senderConnection)
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{
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string address = senderConnection.RemoteEndPoint.Address.MapToIPv4().ToString();
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int incKey = inc.ReadInt32();
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if (ownerKey == 0)
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{
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return false; //ownership key has been destroyed or has never existed
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}
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if (address.ToString() != "127.0.0.1")
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{
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return false; //not localhost
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}
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if (incKey != ownerKey)
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{
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return false; //incorrect owner key, how did this even happen
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}
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return true;
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}
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private void HandleOwnership(NetIncomingMessage inc, NetConnection senderConnection)
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{
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DebugConsole.Log("HandleOwnership (" + senderConnection.RemoteEndPoint.Address + ")");
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if (IsServerOwner(inc, senderConnection))
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{
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ownerKey = 0; //destroy owner key so nobody else can take ownership of the server
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OwnerConnection = senderConnection;
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DebugConsole.NewMessage("Successfully set up server owner", Color.Lime);
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}
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}
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private void HandleClientAuthRequest(NetConnection connection, ulong steamID = 0)
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{
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DebugConsole.Log("HandleClientAuthRequest (steamID " + steamID + ")");
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if (GameMain.Config.RequireSteamAuthentication && connection != OwnerConnection && steamID == 0)
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{
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DebugConsole.Log("Disconnecting " + connection.RemoteEndPoint + ", Steam authentication required.");
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connection.Disconnect(DisconnectReason.SteamAuthenticationRequired.ToString());
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return;
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}
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//client wants to know if server requires password
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if (ConnectedClients.Find(c => c.Connection == connection) != null)
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{
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//this client has already been authenticated
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return;
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}
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UnauthenticatedClient unauthClient = unauthenticatedClients.Find(uc => uc.Connection == connection);
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if (unauthClient == null)
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{
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DebugConsole.Log("Unauthed client, generating a nonce...");
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//new client, generate nonce and add to unauth queue
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if (ConnectedClients.Count >= serverSettings.MaxPlayers)
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{
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//server is full, can't allow new connection
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connection.Disconnect(DisconnectReason.ServerFull.ToString());
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if (steamID > 0) { Steam.SteamManager.StopAuthSession(steamID); }
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return;
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}
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int nonce = CryptoRandom.Instance.Next();
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unauthClient = new UnauthenticatedClient(connection, nonce, steamID);
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unauthenticatedClients.Add(unauthClient);
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}
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unauthClient.AuthTimer = 10.0f;
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//if the client is already in the queue, getting another unauth request means that our response was lost; resend
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NetOutgoingMessage nonceMsg = server.CreateMessage();
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nonceMsg.Write((byte)ServerPacketHeader.AUTH_RESPONSE);
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if (serverSettings.HasPassword && connection != OwnerConnection)
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{
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nonceMsg.Write(true); //true = password
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nonceMsg.Write((Int32)unauthClient.Nonce); //here's nonce, encrypt with this
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}
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else
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{
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nonceMsg.Write(false); //false = no password
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}
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CompressOutgoingMessage(nonceMsg);
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DebugConsole.Log("Sending auth response...");
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server.SendMessage(nonceMsg, connection, NetDeliveryMethod.Unreliable);
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}
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private void ClientInitRequest(NetIncomingMessage inc)
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{
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DebugConsole.Log("Received client init request");
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if (ConnectedClients.Find(c => c.Connection == inc.SenderConnection) != null)
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{
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//this client was already authenticated
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//another init request means they didn't get any update packets yet
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DebugConsole.Log("Client already connected, ignoring...");
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return;
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}
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UnauthenticatedClient unauthClient = unauthenticatedClients.Find(uc => uc.Connection == inc.SenderConnection);
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if (unauthClient == null)
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{
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//client did not ask for nonce first, can't authorize
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inc.SenderConnection.Disconnect(DisconnectReason.AuthenticationRequired.ToString());
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if (unauthClient.SteamID > 0) { Steam.SteamManager.StopAuthSession(unauthClient.SteamID); }
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return;
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}
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if (serverSettings.HasPassword && inc.SenderConnection != OwnerConnection)
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{
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//decrypt message and compare password
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string clPw = inc.ReadString();
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if (!serverSettings.IsPasswordCorrect(clPw, unauthClient.Nonce))
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{
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unauthClient.FailedAttempts++;
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if (unauthClient.FailedAttempts > 3)
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{
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//disconnect and ban after too many failed attempts
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serverSettings.BanList.BanPlayer("Unnamed", unauthClient.Connection.RemoteEndPoint.Address, "DisconnectMessage.TooManyFailedLogins", duration: null);
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DisconnectUnauthClient(inc, unauthClient, DisconnectReason.TooManyFailedLogins, "");
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Log(inc.SenderConnection.RemoteEndPoint.Address.ToString() + " has been banned from the server (too many wrong passwords)", ServerLog.MessageType.Error);
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DebugConsole.NewMessage(inc.SenderConnection.RemoteEndPoint.Address.ToString() + " has been banned from the server (too many wrong passwords)", Color.Red);
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return;
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}
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else
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{
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//not disconnecting the player here, because they'll still use the same connection and nonce if they try logging in again
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NetOutgoingMessage reject = server.CreateMessage();
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reject.Write((byte)ServerPacketHeader.AUTH_FAILURE);
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reject.Write("Wrong password! You have " + Convert.ToString(4 - unauthClient.FailedAttempts) + " more attempts before you're banned from the server.");
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Log(inc.SenderConnection.RemoteEndPoint.Address.ToString() + " failed to join the server (incorrect password)", ServerLog.MessageType.Error);
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DebugConsole.NewMessage(inc.SenderConnection.RemoteEndPoint.Address.ToString() + " failed to join the server (incorrect password)", Color.Red);
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CompressOutgoingMessage(reject);
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server.SendMessage(reject, unauthClient.Connection, NetDeliveryMethod.Unreliable);
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unauthClient.AuthTimer = 10.0f;
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return;
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}
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}
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}
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string clVersion = inc.ReadString();
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UInt16 contentPackageCount = inc.ReadUInt16();
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List<string> contentPackageNames = new List<string>();
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List<string> contentPackageHashes = new List<string>();
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for (int i = 0; i < contentPackageCount; i++)
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{
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string packageName = inc.ReadString();
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string packageHash = inc.ReadString();
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contentPackageNames.Add(packageName);
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contentPackageHashes.Add(packageHash);
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if (contentPackageCount == 0)
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{
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DebugConsole.Log("Client is using content package " +
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(packageName ?? "null") + " (" + (packageHash ?? "null" + ")"));
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}
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}
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if (contentPackageCount == 0)
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{
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DebugConsole.Log("Client did not list any content packages.");
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}
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string clName = Client.SanitizeName(inc.ReadString());
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if (string.IsNullOrWhiteSpace(clName))
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{
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DisconnectUnauthClient(inc, unauthClient, DisconnectReason.NoName, "");
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Log(inc.SenderConnection.RemoteEndPoint.Address.ToString() + " couldn't join the server (no name given)", ServerLog.MessageType.Error);
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DebugConsole.NewMessage(inc.SenderConnection.RemoteEndPoint.Address.ToString() + " couldn't join the server (no name given)", Color.Red);
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return;
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}
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if (clVersion != GameMain.Version.ToString())
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{
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DisconnectUnauthClient(inc, unauthClient, DisconnectReason.InvalidVersion,
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$"DisconnectMessage.InvalidVersion~[version]={GameMain.Version.ToString()}~[clientversion]={clVersion}");
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Log(clName + " (" + inc.SenderConnection.RemoteEndPoint.Address.ToString() + ") couldn't join the server (wrong game version)", ServerLog.MessageType.Error);
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DebugConsole.NewMessage(clName + " (" + inc.SenderConnection.RemoteEndPoint.Address.ToString() + ") couldn't join the server (wrong game version)", Color.Red);
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return;
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}
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//check if the client is missing any of the content packages the server requires
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List<ContentPackage> missingPackages = new List<ContentPackage>();
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foreach (ContentPackage contentPackage in GameMain.SelectedPackages)
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{
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if (!contentPackage.HasMultiplayerIncompatibleContent) continue;
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bool packageFound = false;
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for (int i = 0; i < contentPackageCount; i++)
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{
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if (contentPackageNames[i] == contentPackage.Name && contentPackageHashes[i] == contentPackage.MD5hash.Hash)
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{
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packageFound = true;
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break;
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}
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}
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if (!packageFound) missingPackages.Add(contentPackage);
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}
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if (missingPackages.Count == 1)
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{
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DisconnectUnauthClient(inc, unauthClient, DisconnectReason.MissingContentPackage, $"DisconnectMessage.MissingContentPackage~[missingcontentpackage]={GetPackageStr(missingPackages[0])}");
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Log(clName + " (" + inc.SenderConnection.RemoteEndPoint.Address.ToString() + ") couldn't join the server (missing content package " + GetPackageStr(missingPackages[0]) + ")", ServerLog.MessageType.Error);
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return;
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}
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else if (missingPackages.Count > 1)
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{
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List<string> packageStrs = new List<string>();
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missingPackages.ForEach(cp => packageStrs.Add(GetPackageStr(cp)));
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DisconnectUnauthClient(inc, unauthClient, DisconnectReason.MissingContentPackage, $"DisconnectMessage.MissingContentPackages~[missingcontentpackages]={string.Join(", ", packageStrs)}");
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Log(clName + " (" + inc.SenderConnection.RemoteEndPoint.Address.ToString() + ") couldn't join the server (missing content packages " + string.Join(", ", packageStrs) + ")", ServerLog.MessageType.Error);
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return;
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}
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string GetPackageStr(ContentPackage contentPackage)
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{
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return "\"" + contentPackage.Name + "\" (hash " + contentPackage.MD5hash.ShortHash + ")";
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}
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//check if the client is using any contentpackages that are not compatible with the server
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List<Pair<string, string>> incompatiblePackages = new List<Pair<string, string>>();
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for (int i = 0; i < contentPackageNames.Count; i++)
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{
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if (!GameMain.Config.SelectedContentPackages.Any(cp => cp.Name == contentPackageNames[i] && cp.MD5hash.Hash == contentPackageHashes[i]))
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{
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incompatiblePackages.Add(new Pair<string, string>(contentPackageNames[i], contentPackageHashes[i]));
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}
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}
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if (incompatiblePackages.Count == 1)
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{
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DisconnectUnauthClient(inc, unauthClient, DisconnectReason.IncompatibleContentPackage,
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$"DisconnectMessage.IncompatibleContentPackage~[incompatiblecontentpackage]={GetPackageStr2(incompatiblePackages[0])}");
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Log(clName + " (" + inc.SenderConnection.RemoteEndPoint.Address.ToString() + ") couldn't join the server (incompatible content package " + GetPackageStr2(incompatiblePackages[0]) + ")", ServerLog.MessageType.Error);
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return;
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}
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else if (incompatiblePackages.Count > 1)
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{
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List<string> packageStrs = new List<string>();
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incompatiblePackages.ForEach(cp => packageStrs.Add(GetPackageStr2(cp)));
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DisconnectUnauthClient(inc, unauthClient, DisconnectReason.IncompatibleContentPackage,
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$"DisconnectMessage.IncompatibleContentPackages~[incompatiblecontentpackages]={string.Join(", ", packageStrs)}");
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Log(clName + " (" + inc.SenderConnection.RemoteEndPoint.Address.ToString() + ") couldn't join the server (incompatible content packages " + string.Join(", ", packageStrs) + ")", ServerLog.MessageType.Error);
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return;
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}
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string GetPackageStr2(Pair<string, string> nameAndHash)
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{
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return "\"" + nameAndHash.First + "\" (hash " + Md5Hash.GetShortHash(nameAndHash.Second) + ")";
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}
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if (!serverSettings.Whitelist.IsWhiteListed(clName, inc.SenderConnection.RemoteEndPoint.Address))
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{
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DisconnectUnauthClient(inc, unauthClient, DisconnectReason.NotOnWhitelist, "");
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Log(clName + " (" + inc.SenderConnection.RemoteEndPoint.Address.ToString() + ") couldn't join the server (not in whitelist)", ServerLog.MessageType.Error);
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DebugConsole.NewMessage(clName + " (" + inc.SenderConnection.RemoteEndPoint.Address.ToString() + ") couldn't join the server (not in whitelist)", Color.Red);
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return;
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}
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if (!Client.IsValidName(clName, this))
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{
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DisconnectUnauthClient(inc, unauthClient, DisconnectReason.InvalidName, "");
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Log(clName + " (" + inc.SenderConnection.RemoteEndPoint.Address.ToString() + ") couldn't join the server (invalid name)", ServerLog.MessageType.Error);
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DebugConsole.NewMessage(clName + " (" + inc.SenderConnection.RemoteEndPoint.Address.ToString() + ") couldn't join the server (invalid name)", Color.Red);
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return;
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}
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if (inc.SenderConnection != OwnerConnection && Homoglyphs.Compare(clName.ToLower(),Name.ToLower()))
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{
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DisconnectUnauthClient(inc, unauthClient, DisconnectReason.NameTaken, "");
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Log(clName + " (" + inc.SenderConnection.RemoteEndPoint.Address.ToString() + ") couldn't join the server (name taken by the server)", ServerLog.MessageType.Error);
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DebugConsole.NewMessage(clName + " (" + inc.SenderConnection.RemoteEndPoint.Address.ToString() + ") couldn't join the server (name taken by the server)", Color.Red);
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return;
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}
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Client nameTaken = ConnectedClients.Find(c => Homoglyphs.Compare(c.Name.ToLower(), clName.ToLower()));
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if (nameTaken != null)
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{
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if (nameTaken.Connection.RemoteEndPoint.Address.ToString() == inc.SenderEndPoint.Address.ToString())
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{
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//both name and IP address match, replace this player's connection
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nameTaken.Connection.Disconnect(DisconnectReason.SessionTaken.ToString());
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nameTaken.Connection = unauthClient.Connection;
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nameTaken.InitClientSync(); //reinitialize sync ids because this is a new connection
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unauthenticatedClients.Remove(unauthClient);
|
|
unauthClient = null;
|
|
return;
|
|
}
|
|
else
|
|
{
|
|
//can't authorize this client
|
|
DisconnectUnauthClient(inc, unauthClient, DisconnectReason.NameTaken, "");
|
|
Log(clName + " (" + inc.SenderConnection.RemoteEndPoint.Address.ToString() + ") couldn't join the server (name already taken)", ServerLog.MessageType.Error);
|
|
DebugConsole.NewMessage(clName + " (" + inc.SenderConnection.RemoteEndPoint.Address.ToString() + ") couldn't join the server (name already taken)", Color.Red);
|
|
return;
|
|
}
|
|
}
|
|
|
|
//new client
|
|
Client newClient = new Client(clName, GetNewClientID());
|
|
newClient.InitClientSync();
|
|
newClient.Connection = unauthClient.Connection;
|
|
newClient.SteamID = unauthClient.SteamID;
|
|
unauthenticatedClients.Remove(unauthClient);
|
|
unauthClient = null;
|
|
ConnectedClients.Add(newClient);
|
|
LastClientListUpdateID++;
|
|
|
|
if (newClient.Connection == OwnerConnection)
|
|
{
|
|
newClient.GivePermission(ClientPermissions.All);
|
|
newClient.PermittedConsoleCommands.AddRange(DebugConsole.Commands);
|
|
|
|
GameMain.Server.UpdateClientPermissions(newClient);
|
|
GameMain.Server.SendConsoleMessage("Granted all permissions to " + newClient.Name + ".", newClient);
|
|
}
|
|
|
|
GameMain.Server.SendChatMessage($"ServerMessage.JoinedServer~[client]={clName}", ChatMessageType.Server, null);
|
|
|
|
var savedPermissions = serverSettings.ClientPermissions.Find(cp =>
|
|
cp.SteamID > 0 ?
|
|
cp.SteamID == newClient.SteamID :
|
|
newClient.IPMatches(cp.IP));
|
|
|
|
if (savedPermissions != null)
|
|
{
|
|
newClient.SetPermissions(savedPermissions.Permissions, savedPermissions.PermittedCommands);
|
|
}
|
|
else
|
|
{
|
|
newClient.SetPermissions(ClientPermissions.None, new List<DebugConsole.Command>());
|
|
}
|
|
}
|
|
|
|
private void DisconnectUnauthClient(NetIncomingMessage inc, UnauthenticatedClient unauthClient, DisconnectReason reason, string message)
|
|
{
|
|
inc.SenderConnection.Disconnect(reason.ToString() + "/ " + TextManager.GetServerMessage(message));
|
|
if (unauthClient.SteamID > 0) { Steam.SteamManager.StopAuthSession(unauthClient.SteamID); }
|
|
if (unauthClient != null)
|
|
{
|
|
unauthenticatedClients.Remove(unauthClient);
|
|
}
|
|
}
|
|
}
|
|
}
|