AmongUsMods/EndlessHostRoles
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EndlessHostRoles/Modules/EAC.cs
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using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using AmongUs.GameOptions;
using AmongUs.QuickChat;
using BepInEx.Unity.IL2CPP.Utils.Collections;
using HarmonyLib;
using Hazel;
using InnerNet;
using UnityEngine;
using static EHR.Translator;
namespace EHR;
internal static class EAC
{
public static int DeNum;
public static readonly Dictionary<byte, Stopwatch> TimeSinceLastTaskCompletion = [];
public static void WarnHost(int denum = 1)
{
DeNum += denum;
if (ErrorText.Instance)
{
ErrorText.Instance.CheatDetected = DeNum > 3;
ErrorText.Instance.SBDetected = DeNum > 10;
if (ErrorText.Instance.CheatDetected)
ErrorText.Instance.AddError(ErrorText.Instance.SBDetected ? ErrorCode.SBDetected : ErrorCode.CheatDetected);
else
ErrorText.Instance.Clear();
}
}
public static bool ReceiveRpc(PlayerControl pc, byte callId, MessageReader reader)
{
if (!AmongUsClient.Instance.AmHost) return false;
if (pc == null || reader == null) return false;
MessageReader sr = MessageReader.Get(reader);
bool gameStarted = AmongUsClient.Instance.GameState is InnerNetClient.GameStates.Started or InnerNetClient.GameStates.Ended;
try
{
var rpc = (RpcCalls)callId;
switch (rpc)
{
case RpcCalls.CheckName:
{
if (!GameStates.IsLobby)
{
WarnHost();
Report(pc, "CheckName out of Lobby");
HandleCheat(pc, "CheckName out of Lobby");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] CheckName out of lobby, rejected", "EAC");
sr.Recycle();
return true;
}
break;
}
case RpcCalls.SendChat when !pc.IsNonHostModdedClient():
{
string text = sr.ReadString();
if (text.Contains('░') ||
text.Contains('▄') ||
text.Contains('█') ||
text.Contains('▌') ||
text.Contains('▒') ||
text.Contains("习近平") ||
(!pc.IsModdedClient() && text.Length > 100))
{
Report(pc, "Illegal messages");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] sent an illegal message, which has been rejected", "EAC");
sr.Recycle();
return true;
}
break;
}
case RpcCalls.ReportDeadBody:
{
byte targetId = sr.ReadByte();
if (GameStates.IsMeeting && MeetingHud.Instance.state != MeetingHud.VoteStates.Animating && !pc.IsHost())
{
WarnHost();
Report(pc, "Report dead body in meeting");
HandleCheat(pc, "Report dead body in meeting");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] attempted to report a body in a meeting, rejected", "EAC");
sr.Recycle();
return true;
}
if (!GameStates.IsInGame)
{
WarnHost();
Report(pc, "Try to Report body out of game B");
sr.Recycle();
return true;
}
if (GameManager.Instance.TryCast<HideAndSeekManager>())
{
WarnHost();
Report(pc, "Try to Report body in Hide and Seek");
HandleCheat(pc, "Try to Report body in Hide and Seek");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] attempted to report a body in Hide and Seek, rejected", "EAC");
sr.Recycle();
return true;
}
if (targetId != byte.MaxValue)
{
bool bodyExists = Object.FindObjectsOfType<DeadBody>().Any(deadBody => deadBody.ParentId == targetId);
if (!bodyExists && targetId != pc.PlayerId && (!MeetingHud.Instance || MeetingHud.Instance.state != MeetingHud.VoteStates.Animating))
{
Logger.Warn($"Player [{pc.OwnerId}:{pc.GetRealName()}] attempted to report a body that does't exist D", "EAC");
sr.Recycle();
return true;
}
}
break;
}
case RpcCalls.SendQuickChat:
{
var quickChatPhraseType = (QuickChatPhraseType)sr.ReadByte();
switch (quickChatPhraseType)
{
case QuickChatPhraseType.Empty:
{
HandleCheat(pc, "Empty message in quick chat");
sr.Recycle();
return true;
}
case QuickChatPhraseType.PlayerId:
{
byte playerID = sr.ReadByte();
if (playerID == 255)
{
HandleCheat(pc, "Sending invalid player in quick chat");
sr.Recycle();
return true;
}
if (GameStates.InGame && GameData.Instance.GetPlayerById(playerID) == null)
{
HandleCheat(pc, "Sending non existing player in quick chat");
sr.Recycle();
return true;
}
break;
}
}
if (quickChatPhraseType != QuickChatPhraseType.ComplexPhrase) break;
sr.ReadUInt16();
int num = sr.ReadByte();
switch (num)
{
case 0:
{
HandleCheat(pc, "Complex phrase without arguments");
sr.Recycle();
return true;
}
case > 3:
{
HandleCheat(pc, "Trying to crash or lag other players");
sr.Recycle();
return true;
}
}
break;
}
case RpcCalls.CheckColor when !pc.IsNonHostModdedClient():
{
if (!GameStates.IsLobby)
{
WarnHost();
Report(pc, "CheckColor out of Lobby");
HandleCheat(pc, "CheckColor out of Lobby");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] check color out of lobby, rejected", "EAC");
sr.Recycle();
return true;
}
byte colorId = sr.ReadByte();
if (colorId > 17)
{
WarnHost();
Report(pc, "Invalid color");
HandleCheat(pc, "Invalid color");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] sent invalid color {colorId}, rejected", "EAC");
sr.Recycle();
return true;
}
break;
}
case RpcCalls.SetColor when !pc.IsModdedClient() && (!Options.PlayerCanSetColor.GetBool() || !GameStates.IsLobby):
{
WarnHost();
Report(pc, "Directly SetColor");
HandleCheat(pc, "Directly SetColor");
Logger.Fatal($"Directly SetColor【{pc.OwnerId}:{pc.GetRealName()}】has been rejected", "EAC");
sr.Recycle();
return true;
}
case RpcCalls.CheckMurder:
{
if (GameStates.IsLobby)
{
WarnHost();
Report(pc, "CheckMurder in Lobby");
HandleCheat(pc, "CheckMurder in Lobby");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] Illegal check kill, rejected", "EAC");
sr.Recycle();
return true;
}
break;
}
case RpcCalls.MurderPlayer:
{
var target = sr.ReadNetObject<PlayerControl>();
var resultFlags = (MurderResultFlags)sr.ReadInt32();
if (GameStates.IsInTask && !resultFlags.HasFlag(MurderResultFlags.FailedError) && !resultFlags.HasFlag(MurderResultFlags.FailedProtected) && target && !target.Data.IsDead)
LateTask.New(target.RpcRevive, 0.1f, log: false);
Report(pc, "Directly Murder Player");
HandleCheat(pc, "Directly Murder Player");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] directly killed, rejected", "EAC");
sr.Recycle();
return true;
}
case RpcCalls.CheckShapeshift:
{
var target = sr.ReadNetObject<PlayerControl>();
bool animate = sr.ReadBoolean();
if (!gameStarted)
{
WarnHost();
Report(pc, "Using shift button in lobby");
HandleCheat(pc, "Using shift button in lobby");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] sent CheckShapeshift in lobby, rejected", "EAC");
sr.Recycle();
return true;
}
if (target != null && target != pc && !animate)
{
WarnHost();
Report(pc, "No shapeshift animation");
HandleCheat(pc, "No shapeshift animation");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] sent CheckShapeshift with no animation, rejected", "EAC");
sr.Recycle();
return true;
}
if (pc.shapeshiftTargetPlayerId != -1 && target != null && target != pc)
{
WarnHost();
Report(pc, "Shapeshifting while shapeshifted");
HandleCheat(pc, "Shapeshifting while shapeshifted");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] sent CheckShapeshift while shapeshifted, rejected", "EAC");
sr.Recycle();
return true;
}
if (((MeetingHud.Instance && MeetingHud.Instance.state != MeetingHud.VoteStates.Animating) || ExileController.Instance) && target != pc && !(Options.UseMeetingShapeshift.GetBool() && (GuessManager.Data.ContainsKey(pc.PlayerId) || pc.UsesMeetingShapeshift())))
{
WarnHost();
Report(pc, "Trying to shift during meeting");
sr.Recycle();
return true;
}
break;
}
case RpcCalls.Shapeshift when !pc.IsNonHostModdedClient():
{
Report(pc, "Directly Shapeshift");
MessageWriter swriter = AmongUsClient.Instance.StartRpcImmediately(pc.NetId, (byte)RpcCalls.Shapeshift, SendOption.Reliable);
swriter.WriteNetObject(pc);
swriter.Write(false);
AmongUsClient.Instance.FinishRpcImmediately(swriter);
HandleCheat(pc, "Directly Shapeshift");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] directly transformed, rejected", "EAC");
sr.Recycle();
return true;
}
case RpcCalls.StartVanish:
case RpcCalls.StartAppear:
{
string sreason = "Direct Specter RPCs " + rpc;
Report(pc, sreason);
MessageWriter swriter = AmongUsClient.Instance.StartRpcImmediately(pc.NetId, (byte)RpcCalls.StartAppear, SendOption.Reliable);
swriter.Write(false);
AmongUsClient.Instance.FinishRpcImmediately(swriter);
HandleCheat(pc, sreason);
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()} {sreason}, rejected", "EAC");
sr.Recycle();
return true;
}
case RpcCalls.CompleteTask:
{
if (!gameStarted)
{
WarnHost();
Report(pc, "CompleteTask Rpc in lobby");
HandleCheat(pc, "CompleteTask Rpc in lobby");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] sent CompleteTask RPC in lobby, rejected", "EAC");
sr.Recycle();
return true;
}
if (TimeSinceLastTaskCompletion.TryGetValue(pc.PlayerId, out Stopwatch timer) && timer.ElapsedMilliseconds < 100)
{
WarnHost();
Report(pc, "Auto complete tasks");
HandleCheat(pc, "Auto complete tasks");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] sent CompleteTask RPC too fast, rejected", "EAC");
sr.Recycle();
return true;
}
if ((MeetingHud.Instance && MeetingHud.Instance.state != MeetingHud.VoteStates.Animating && !ReportDeadBodyPatch.MeetingStarted) || ExileController.Instance)
{
WarnHost();
Report(pc, "Doing task during meeting");
sr.Recycle();
return true;
}
TimeSinceLastTaskCompletion[pc.PlayerId] = Stopwatch.StartNew();
break;
}
case RpcCalls.SetStartCounter:
{
if (GameStates.InGame)
{
WarnHost();
Report(pc, "SetStartCounter mid game");
HandleCheat(pc, "SetStartCounter Rpc mid game");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] sent SetStartCounter RPC in game, rejected", "EAC");
sr.Recycle();
return true;
}
sr.ReadPackedInt32();
sbyte startCounter = sr.ReadSByte();
if (startCounter != -1)
{
WarnHost();
Report(pc, "Invalid SetStartCounter");
HandleCheat(pc, "Invalid SetStartCounter Rpc");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] sent invalid SetStartCounter RPC, rejected", "EAC");
sr.Recycle();
return true;
}
break;
}
case RpcCalls.CheckVanish:
{
if (!gameStarted)
{
WarnHost();
Report(pc, "Using vanish button in lobby");
HandleCheat(pc, "Using vanish button in lobby");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] sent CheckVanish in lobby, rejected", "EAC");
sr.Recycle();
return true;
}
if ((MeetingHud.Instance && MeetingHud.Instance.state != MeetingHud.VoteStates.Animating) || ExileController.Instance)
{
WarnHost();
Report(pc, "Trying to vanish during meeting");
sr.Recycle();
return true;
}
break;
}
case RpcCalls.CheckAppear:
{
if (!gameStarted)
{
WarnHost();
Report(pc, "Using appear button in lobby");
HandleCheat(pc, "Using appear button in lobby");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] tried to appear in lobby, rejected", "EAC");
sr.Recycle();
return true;
}
if ((MeetingHud.Instance && MeetingHud.Instance.state != MeetingHud.VoteStates.Animating) || ExileController.Instance)
{
WarnHost();
Report(pc, "Trying to appear during meeting");
sr.Recycle();
return true;
}
break;
}
case RpcCalls.PlayAnimation:
{
if (!gameStarted)
{
WarnHost();
Report(pc, "PlayAnimation Rpc in lobby");
HandleCheat(pc, "PlayAnimation Rpc in lobby");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] sent PlayAnimation RPC in lobby, rejected", "EAC");
sr.Recycle();
return true;
}
if (!GameManager.Instance.LogicOptions.GetVisualTasks())
{
WarnHost();
Report(pc, "PlayAnimation Rpc with visuals off");
HandleCheat(pc, "PlayAnimation Rpc with visuals off");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] sent PlayAnimation RPC with visuals off, rejected", "EAC");
sr.Recycle();
return true;
}
if ((MeetingHud.Instance && MeetingHud.Instance.state != MeetingHud.VoteStates.Animating) || ExileController.Instance)
{
WarnHost();
Report(pc, "PlayAnimation Rpc during meeting");
sr.Recycle();
return true;
}
break;
}
case RpcCalls.Exiled:
case RpcCalls.SetName:
case RpcCalls.StartMeeting:
case RpcCalls.SendChatNote:
case RpcCalls.SetRole:
case RpcCalls.ProtectPlayer:
case RpcCalls.UseZipline:
case RpcCalls.TriggerSpores:
case RpcCalls.RejectShapeshift:
{
if (!pc.IsModdedClient())
{
WarnHost();
Report(pc, "Invalid Rpc");
HandleCheat(pc, "Invalid Rpc");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] sent invalid RPC {rpc}, rejected", "EAC");
}
sr.Recycle();
return true;
}
case RpcCalls.SetScanner:
{
if (!GameManager.Instance.LogicOptions.GetVisualTasks())
{
WarnHost();
Report(pc, "SetScanner Rpc with visuals off");
HandleCheat(pc, "SetScanner Rpc with visuals off");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] sent SetScanner RPC with visuals off, rejected", "EAC");
sr.Recycle();
return true;
}
if (!sr.ReadBoolean()) break;
if (!gameStarted)
{
WarnHost();
Report(pc, "SetScanner Rpc in lobby");
HandleCheat(pc, "SetScanner Rpc in lobby");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] sent SetScanner RPC in lobby, rejected", "EAC");
sr.Recycle();
return true;
}
if ((MeetingHud.Instance && MeetingHud.Instance.state != MeetingHud.VoteStates.Animating) || ExileController.Instance)
{
WarnHost();
Report(pc, "SetScanner Rpc during meeting");
sr.Recycle();
return true;
}
if (pc.IsImpostor())
{
WarnHost();
Report(pc, "SetScanner Rpc as impostor");
sr.Recycle();
return true;
}
if (pc.myTasks.ToArray().All(x => x.TaskType != TaskTypes.SubmitScan))
{
WarnHost();
Report(pc, "SetScanner Rpc without Submit Scan task");
sr.Recycle();
return true;
}
break;
}
case RpcCalls.UsePlatform:
{
if (!gameStarted)
{
WarnHost();
Report(pc, "Using platform in lobby");
HandleCheat(pc, "Using platform in lobby");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] tried to use platform in lobby, rejected", "EAC");
sr.Recycle();
return true;
}
if (GameManager.Instance.LogicOptions.MapId != 4 && !SubmergedCompatibility.IsSubmerged())
{
WarnHost();
Report(pc, "Using platform on wrong map");
HandleCheat(pc, "Using platform on wrong map");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] tried to use platform on a map that does not have platforms, rejected", "EAC");
sr.Recycle();
return true;
}
if (GameManager.Instance.TryCast<HideAndSeekManager>())
{
WarnHost();
Report(pc, "Using platform in hide n seek");
HandleCheat(pc, "Using platform in hide n seek");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] tried to use platform in hide n seek, rejected", "EAC");
sr.Recycle();
return true;
}
if ((MeetingHud.Instance && MeetingHud.Instance.state != MeetingHud.VoteStates.Animating) || ExileController.Instance)
{
WarnHost();
Report(pc, "Using platform during meeting");
sr.Recycle();
return true;
}
break;
}
case RpcCalls.CheckProtect:
{
var target = sr.ReadNetObject<PlayerControl>();
if (!gameStarted)
{
WarnHost();
Report(pc, "Using protect button in lobby");
HandleCheat(pc, "Using protect button in lobby");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] tried to protect in lobby, rejected", "EAC");
sr.Recycle();
return true;
}
if (target != null && target == pc)
{
WarnHost();
Report(pc, "Using protect button on self");
sr.Recycle();
return true;
}
if (target == null) break;
if ((MeetingHud.Instance && MeetingHud.Instance.state != MeetingHud.VoteStates.Animating) || ExileController.Instance)
{
WarnHost();
Report(pc, "Trying to protect during meeting");
sr.Recycle();
return true;
}
break;
}
case RpcCalls.CheckZipline:
{
if (!gameStarted)
{
WarnHost();
Report(pc, "Using zipline in lobby");
HandleCheat(pc, "Using zipline in lobby");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] tried to use zipline in lobby, rejected", "EAC");
sr.Recycle();
return true;
}
if (GameManager.Instance.LogicOptions.MapId < 5)
{
WarnHost();
Report(pc, "Using zipline on wrong map");
HandleCheat(pc, "Using zipline on wrong map");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] tried to use zipline on a map that does not have ziplines, rejected", "EAC");
sr.Recycle();
return true;
}
if ((MeetingHud.Instance && MeetingHud.Instance.state != MeetingHud.VoteStates.Animating) || ExileController.Instance)
{
WarnHost();
Report(pc, "Using zipline during meeting");
sr.Recycle();
return true;
}
break;
}
case RpcCalls.CheckSpore:
{
if (!gameStarted)
{
WarnHost();
Report(pc, "Triggering spore in lobby");
HandleCheat(pc, "Triggering spore in lobby");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] tried to trigger spore in lobby, rejected", "EAC");
sr.Recycle();
return true;
}
if (GameManager.Instance.LogicOptions.MapId < 5)
{
WarnHost();
Report(pc, "Triggering spore on wrong map");
HandleCheat(pc, "Triggering spore on wrong map");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] tried to trigger spore on a map that does not have spores, rejected", "EAC");
sr.Recycle();
return true;
}
if ((MeetingHud.Instance && MeetingHud.Instance.state != MeetingHud.VoteStates.Animating) || ExileController.Instance)
{
WarnHost();
Report(pc, "Triggering spore during meeting");
sr.Recycle();
return true;
}
break;
}
}
switch (callId)
{
case 101: // Aum Chat
{
try
{
string firstString = sr.ReadString();
string secondString = sr.ReadString();
sr.ReadInt32();
bool flag = string.IsNullOrWhiteSpace(firstString) && string.IsNullOrWhiteSpace(secondString);
if (!flag)
{
Report(pc, "Aum Chat RPC");
HandleCheat(pc, "Aum Chat RPC");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] sent AUM chat, rejected", "EAC");
sr.Recycle();
return true;
}
}
catch { }
break;
}
case unchecked((byte)42069): // 85 AUM
{
try
{
byte aumid = sr.ReadByte();
if (aumid == pc.PlayerId)
{
Report(pc, "AUM RPC (Hack)");
HandleCheat(pc, "AUM RPC (Hack)");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] sent AUM RPC, rejected", "EAC");
sr.Recycle();
return true;
}
}
catch { }
break;
}
case unchecked((byte)420): // 164 Sicko
{
if (sr.BytesRemaining == 0)
{
Report(pc, "Sicko RPC (Hack against host-only mods, like EHR)");
HandleCheat(pc, "Sicko RPC (Hack against host-only mods, like EHR)");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] sent Sicko RPC, rejected", "EAC");
sr.Recycle();
return true;
}
break;
}
case 119:
{
try
{
string firstString = sr.ReadString();
string secondString = sr.ReadString();
sr.ReadInt32();
bool flag = string.IsNullOrWhiteSpace(firstString) && string.IsNullOrWhiteSpace(secondString);
if (!flag)
{
HandleCheat(pc, "KN Chat");
sr.Recycle();
return true;
}
}
catch { }
break;
}
case 250:
{
if (sr.BytesRemaining == 0)
{
HandleCheat(pc, "KN");
sr.Recycle();
return true;
}
break;
}
case 7 when !pc.IsNonHostModdedClient():
case 8 when !pc.IsNonHostModdedClient():
{
if (!GameStates.IsLobby)
{
WarnHost();
Report(pc, "Illegal setting of color");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] illegally set the color, rejected", "EAC");
sr.Recycle();
return true;
}
break;
}
case 5 when !pc.IsNonHostModdedClient():
{
sr.ReadString();
if (GameStates.IsInGame)
{
WarnHost();
Report(pc, "Illegal setting of game name");
Logger.Fatal($"Illegal modification of the game name of the player [{pc.OwnerId}:{pc.GetRealName()}] has been rejected", "EAC");
sr.Recycle();
return true;
}
break;
}
case 47:
{
if (GameStates.IsLobby)
{
WarnHost();
Report(pc, "Illegal Killing");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] illegally killed, rejected", "EAC");
sr.Recycle();
return true;
}
break;
}
case 38 when !pc.IsNonHostModdedClient():
{
if (GameStates.IsInGame)
{
WarnHost();
Report(pc, "Set level in game");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] changed the level in the game, which has been rejected", "EAC");
sr.Recycle();
return true;
}
break;
}
case 39 when !pc.IsNonHostModdedClient():
case 40 when !pc.IsNonHostModdedClient():
case 41 when !pc.IsNonHostModdedClient():
case 42 when !pc.IsNonHostModdedClient():
case 43 when !pc.IsNonHostModdedClient():
{
if (GameStates.IsInGame)
{
WarnHost();
Report(pc, "Change skin in game");
Logger.Fatal($"Player [{pc.OwnerId}:{pc.GetRealName()}] changed skin in the game, rejected", "EAC");
sr.Recycle();
return true;
}
break;
}
}
}
catch (Exception e) { Logger.Exception(e, "EAC"); }
finally { sr.Recycle(); }
WarnHost(-1);
return false;
}
public static bool PlayerPhysicsRpcCheck(PlayerPhysics __instance, byte callId, MessageReader reader) // Credit: NikoCat233
{
if (!AmongUsClient.Instance.AmHost) return false;
var rpcType = (RpcCalls)callId;
MessageReader subReader = MessageReader.Get(reader);
bool gameStarted = AmongUsClient.Instance.GameState is InnerNetClient.GameStates.Started or InnerNetClient.GameStates.Ended;
try
{
PlayerControl player = __instance.myPlayer;
if (!player)
{
Logger.Warn("Received Physics RPC without a player", "EAC_PlayerPhysics");
subReader.Recycle();
return true;
}
if (GameStates.IsLobby && rpcType is not RpcCalls.Pet and not RpcCalls.CancelPet)
{
WarnHost();
Report(player, $"Physics {rpcType} in lobby (can be spoofed by others)");
HandleCheat(player, $"Physics {rpcType} in lobby (can be spoofed by others)");
Logger.Fatal($"【{player.OwnerId}:{player.GetRealName()}】 attempted to {rpcType} in lobby.", "EAC_physics");
subReader.Recycle();
return true;
}
switch (rpcType)
{
case RpcCalls.EnterVent:
case RpcCalls.ExitVent:
{
if (!gameStarted)
{
WarnHost();
Report(player, "Venting in lobby");
HandleCheat(player, "Venting in lobby");
Logger.Fatal($"【{player.OwnerId}:{player.GetRealName()}】 attempted to vent in lobby.", "EAC_physics");
subReader.Recycle();
return true;
}
if ((MeetingHud.Instance && MeetingHud.Instance.state != MeetingHud.VoteStates.Animating) || ExileController.Instance)
{
WarnHost();
Report(player, "Venting during meeting");
HandleCheat(player, "Venting during meeting");
Logger.Fatal($"【{player.OwnerId}:{player.GetRealName()}】 attempted to vent during a meeting.", "EAC_physics");
subReader.Recycle();
return true;
}
int ventid = subReader.ReadPackedInt32();
if (!HasVent(ventid))
{
if (AmongUsClient.Instance.AmHost)
{
WarnHost();
Report(player, "Vent null vent (can be spoofed by others)");
HandleCheat(player, "Vent null vent (can be spoofed by others)");
Logger.Fatal($"【{player.OwnerId}:{player.GetRealName()}】 attempted to enter an unexisting vent. {ventid}", "EAC_physics");
}
else
{
// Not sure whether host will send null vent to a player huh
Logger.Warn($"【{player.OwnerId}:{player.GetRealName()}】 attempted to enter an unexisting vent. {ventid}", "EAC_physics");
if (rpcType is RpcCalls.ExitVent)
{
player.Visible = true;
player.inVent = false;
player.moveable = true;
player.NetTransform.SetPaused(false);
}
}
subReader.Recycle();
return true;
}
break;
}
case RpcCalls.BootFromVent:
{
// BootFromVent can only be sent by host
WarnHost();
Report(player, "Got boot from vent from clients, can be spoofed");
HandleCheat(player, "Got boot from vent from clients, can be spoofed");
Logger.Fatal($"【{player.OwnerId}:{player.GetRealName()}】 sent boot from vent, can be spoofed.", "EAC_physics");
break;
}
case RpcCalls.ClimbLadder:
{
if (!gameStarted)
{
WarnHost();
Report(player, "Climbing ladder in lobby");
HandleCheat(player, "Climbing ladder in lobby");
Logger.Fatal($"【{player.OwnerId}:{player.GetRealName()}】 attempted to climb a ladder in lobby.", "EAC_physics");
subReader.Recycle();
return true;
}
if (GameManager.Instance.LogicOptions.MapId < 4)
{
WarnHost();
Report(player, "Climbing ladder on wrong map");
HandleCheat(player, "Climbing ladder on wrong map");
Logger.Fatal($"【{player.OwnerId}:{player.GetRealName()}】 attempted to climb a ladder on a map that does not have ladders.", "EAC_physics");
subReader.Recycle();
return true;
}
if ((MeetingHud.Instance && MeetingHud.Instance.state != MeetingHud.VoteStates.Animating) || ExileController.Instance)
{
WarnHost();
Report(player, "Climbing ladder during meeting");
subReader.Recycle();
return true;
}
int ladderId = subReader.ReadPackedInt32();
if (!HasLadder(ladderId))
{
if (AmongUsClient.Instance.AmHost)
{
WarnHost();
Report(player, "climb null ladder (can be spoofed by others)");
HandleCheat(player, "climb null ladder (can be spoofed by others)");
Logger.Fatal($"【{player.OwnerId}:{player.GetRealName()}】 attempted to climb an unexisting ladder.", "EAC_physics");
}
subReader.Recycle();
return true;
}
if (player.AmOwner)
{
Logger.Fatal("Got climb ladder for myself, this is impossible", "EAC_physics");
subReader.Recycle();
return true;
}
break;
}
case RpcCalls.Pet:
{
if (player.AmOwner)
{
Logger.Fatal("Got pet pet for myself, this is impossible", "EAC_physics");
subReader.Recycle();
return true;
}
goto case RpcCalls.CancelPet;
}
case RpcCalls.CancelPet:
{
if (player.inVent)
{
WarnHost();
Report(player, "Petting in vent");
subReader.Recycle();
return true;
}
if ((MeetingHud.Instance && MeetingHud.Instance.state != MeetingHud.VoteStates.Animating) || ExileController.Instance)
{
WarnHost();
Report(player, "Petting during meeting");
subReader.Recycle();
return true;
}
break;
}
}
}
finally { subReader.Recycle(); }
return false;
bool HasLadder(int ladderId) => ShipStatus.Instance.Ladders.Any(l => l.Id == ladderId);
bool HasVent(int ventId) => ShipStatus.Instance.AllVents.Any(v => v.Id == ventId);
}
internal static void Report(PlayerControl pc, string reason)
{
var msg = $"{pc.OwnerId}|{pc.FriendCode}|{pc.Data.PlayerName}|{pc.GetClient().GetHashedPuid()}|{reason}";
//Cloud.SendData(msg);
Logger.Fatal($"EAC report: {msg}", "EAC Cloud");
if (Options.CheatResponses.GetInt() != 4) Logger.SendInGame(string.Format(GetString("Message.NoticeByEAC"), $"{pc.Data?.PlayerName} | {pc.GetClient().GetHashedPuid()}", reason), Color.red);
}
public static bool ReceiveInvalidRpc(PlayerControl pc, byte callId)
{
switch (callId)
{
case unchecked((byte)42069):
{
Report(pc, "AUM");
HandleCheat(pc, GetString("EAC.CheatDetected.EAC"));
break;
}
}
return true;
}
private static void HandleCheat(PlayerControl pc, string text)
{
switch (Options.CheatResponses.GetInt())
{
case 0:
{
if (pc.IsTrusted()) break;
AmongUsClient.Instance.KickPlayer(pc.OwnerId, true);
string msg0 = string.Format(GetString("Message.BannedByEAC"), pc.Data?.PlayerName, text);
Logger.Warn(msg0, "EAC");
Logger.SendInGame(msg0, Color.yellow);
break;
}
case 1:
{
if (pc.IsTrusted()) break;
AmongUsClient.Instance.KickPlayer(pc.OwnerId, false);
string msg1 = string.Format(GetString("Message.KickedByEAC"), pc.Data?.PlayerName, text);
Logger.Warn(msg1, "EAC");
Logger.SendInGame(msg1, Color.yellow);
break;
}
case 2:
{
Utils.SendMessage(string.Format(GetString("Message.NoticeByEAC"), pc?.Data?.PlayerName, text), PlayerControl.LocalPlayer.PlayerId, CustomRoles.Impostor.ColoredTextByRole(GetString("MessageFromEAC")));
break;
}
case 3:
{
(
from player in Main.EnumeratePlayerControls()
where player.PlayerId != pc?.Data?.PlayerId
let message = string.Format(GetString("Message.NoticeByEAC"), pc?.Data?.PlayerName, text)
let title = CustomRoles.Impostor.ColoredTextByRole(GetString("MessageFromEAC"))
select new Message(message, player.PlayerId, title)
).SendMultipleMessages(MessageImportance.Low);
break;
}
case 5:
{
if (pc.IsTrusted()) break;
string hashedPuid = pc.GetClient().GetHashedPuid();
if (!BanManager.TempBanWhiteList.Contains(hashedPuid)) BanManager.TempBanWhiteList.Add(hashedPuid);
AmongUsClient.Instance.KickPlayer(pc.OwnerId, true);
string msg2 = string.Format(GetString("Message.TempBannedByEAC"), pc.Data?.PlayerName, text);
Logger.Warn(msg2, "EAC");
Logger.SendInGame(msg2, Color.yellow);
break;
}
}
}
internal static bool CheckInvalidSabotage(SystemTypes systemType, PlayerControl player, byte amount)
{
if (player.IsModdedClient() || !AmongUsClient.Instance.AmHost) return false;
if (GameStates.IsMeeting && MeetingHud.Instance.state is MeetingHud.VoteStates.Voted or MeetingHud.VoteStates.NotVoted or MeetingHud.VoteStates.Discussion or MeetingHud.VoteStates.Proceeding)
{
WarnHost();
Report(player, "Bad Sabotage D : In Meeting");
HandleCheat(player, "Bad Sabotage D : In Meeting");
Logger.Fatal($"Player [{player.OwnerId}:{player.GetRealName()}] Bad Sabotage D, rejected", "EAC");
return true;
}
byte mapid = Main.NormalOptions.MapId;
switch (systemType)
{
case SystemTypes.LifeSupp:
{
if (mapid != 0 && mapid != 1 && mapid != 3 && !SubmergedCompatibility.IsSubmerged()) goto Cheat;
if (amount != 64 && amount != 65 && !SubmergedCompatibility.IsSubmerged()) goto Cheat;
break;
}
case SystemTypes.Comms:
{
switch (amount)
{
case 0:
{
if (mapid is 1 or 5) goto Cheat;
break;
}
case 64:
case 65:
case 32:
case 33:
case 16:
case 17:
{
if (mapid is not (1 or 5)) goto Cheat;
break;
}
default: { goto Cheat; }
}
break;
}
case SystemTypes.Electrical:
{
if (mapid == 5) goto Cheat;
if (amount >= 5) goto Cheat;
break;
}
case SystemTypes.Laboratory:
{
if (mapid != 2) goto Cheat;
if (amount is not (64 or 65 or 32 or 33)) goto Cheat;
break;
}
case SystemTypes.Reactor:
{
if (mapid is 2 or 4) goto Cheat;
if (amount is not (64 or 65 or 32 or 33)) goto Cheat;
break;
}
case SystemTypes.HeliSabotage:
{
if (mapid != 4) goto Cheat;
if (amount is not (64 or 65 or 16 or 17 or 32 or 33)) goto Cheat;
break;
}
case SystemTypes.MushroomMixupSabotage: { goto Cheat; }
}
return false;
Cheat:
WarnHost();
Report(player, "Bad Sabotage C : Hack send RPC");
HandleCheat(player, "Bad Sabotage C");
Logger.Fatal($"Player [{player.OwnerId}:{player.GetRealName()}] Bad Sabotage C, rejected", "EAC");
return true;
}
}
// https://github.com/0xDrMoe/TownofHost-Enhanced/blob/main/Patches/InnerNetClientPatch.cs
internal enum GameDataTag : byte
{
DataFlag = 1,
RpcFlag = 2,
SpawnFlag = 4,
DespawnFlag = 5,
SceneChangeFlag = 6,
ReadyFlag = 7,
ChangeSettingsFlag = 8,
ConsoleDeclareClientPlatformFlag = 205,
PS4RoomRequest = 206,
XboxDeclareXuid = 207
}
[HarmonyPatch(typeof(InnerNetClient), nameof(InnerNetClient.HandleGameDataInner))]
internal static class GameDataHandlerPatch
{
public static bool Prepare()
{
// Disable EAC on Android.
return !OperatingSystem.IsAndroid();
}
private static IEnumerator EmptyCoroutine() // fixes errors if we return false
{
yield break;
}
public static bool Prefix(InnerNetClient __instance, MessageReader reader, int msgNum, ref Il2CppSystem.Collections.IEnumerator __result)
{
var tag = (GameDataTag)reader.Tag;
switch (tag)
{
case GameDataTag.DataFlag:
{
uint netId = reader.ReadPackedUInt32();
if (__instance.allObjects.allObjectsFast.TryGetValue(netId, out InnerNetObject obj))
{
if (obj.AmOwner)
{
Logger.Warn($"Received DataFlag for object {netId.ToString()} {obj.name} that we own.", "GameDataHandlerPatch");
EAC.WarnHost();
__result = EmptyCoroutine().WrapToIl2Cpp();
return false;
}
if (AmongUsClient.Instance.AmHost)
{
if (obj == MeetingHud.Instance)
{
Logger.Warn($"Received DataFlag for MeetingHud {netId.ToString()} that we own.", "GameDataHandlerPatch");
EAC.WarnHost();
__result = EmptyCoroutine().WrapToIl2Cpp();
return false;
}
if (obj == VoteBanSystem.Instance)
{
Logger.Warn($"Received DataFlag for VoteBanSystem {netId.ToString()} that we own.", "GameDataHandlerPatch");
EAC.WarnHost();
__result = EmptyCoroutine().WrapToIl2Cpp();
return false;
}
if (obj is NetworkedPlayerInfo)
{
Logger.Warn($"Received DataFlag for NetworkedPlayerInfo {netId.ToString()} that we own.", "GameDataHandlerPatch");
EAC.WarnHost();
__result = EmptyCoroutine().WrapToIl2Cpp();
return false;
}
}
}
break;
}
case GameDataTag.RpcFlag:
case GameDataTag.SpawnFlag:
case GameDataTag.DespawnFlag:
break;
case GameDataTag.SceneChangeFlag:
{
// Sender is only allowed to change his own scene.
int clientId = reader.ReadPackedInt32();
string scene = reader.ReadString();
ClientData client = Utils.GetClientById(clientId);
if (client == null)
{
Logger.Warn($"Received SceneChangeFlag for unknown client {clientId}.", "GameDataHandlerPatch");
__result = EmptyCoroutine().WrapToIl2Cpp();
return false;
}
if (string.IsNullOrWhiteSpace(scene))
{
Logger.Warn($"Client {client.PlayerName} ({client.Id}) tried to send SceneChangeFlag with null scene.", "GameDataHandlerPatch");
EAC.WarnHost();
__result = EmptyCoroutine().WrapToIl2Cpp();
return false;
}
if (scene.ToLower() == "tutorial")
{
Logger.Warn($"Client {client.PlayerName} ({client.Id}) tried to send SceneChangeFlag to Tutorial.", "GameDataHandlerPatch");
EAC.WarnHost(100);
if (GameStates.IsOnlineGame && AmongUsClient.Instance.AmHost) Utils.ErrorEnd("SceneChange Tutorial Hack");
__result = EmptyCoroutine().WrapToIl2Cpp();
return false;
}
if (GameStates.IsInGame)
{
Logger.Warn($"Client {client.PlayerName} ({client.Id}) tried to send SceneChangeFlag during mid of game.", "GameDataHandlerPatch");
__result = EmptyCoroutine().WrapToIl2Cpp();
return false;
}
break;
}
case GameDataTag.ReadyFlag:
{
int clientId = reader.ReadPackedInt32();
ClientData client = Utils.GetClientById(clientId);
if (client == null)
{
Logger.Warn($"Received ReadyFlag for unknown client {clientId}.", "GameDataHandlerPatch");
EAC.WarnHost();
__result = EmptyCoroutine().WrapToIl2Cpp();
return false;
}
if (AmongUsClient.Instance.AmHost)
{
if (!StartGameHostPatchEAC.IsStartingAsHost)
{
Logger.Warn($"Received ReadyFlag while game is started from {clientId}.", "GameDataHandlerPatch");
EAC.WarnHost();
__result = EmptyCoroutine().WrapToIl2Cpp();
return false;
}
}
break;
}
case GameDataTag.ConsoleDeclareClientPlatformFlag:
break;
}
return true;
}
}
[HarmonyPatch(typeof(AmongUsClient), nameof(AmongUsClient.CoStartGameHost))]
internal static class StartGameHostPatchEAC
{
public static bool IsStartingAsHost;
public static void Prefix()
{
if (LobbyBehaviour.Instance != null) IsStartingAsHost = true;
}
public static void Postfix()
{
if (ShipStatus.Instance != null) IsStartingAsHost = false;
}
}
//[HarmonyPatch(typeof(PlayerControl), nameof(PlayerControl.FixedUpdate))]
internal static class CheckInvalidMovementPatch
{
private static readonly Dictionary<byte, long> LastCheck = [];
public static readonly Dictionary<byte, Vector2> LastPosition = [];
public static readonly HashSet<byte> ExemptedPlayers = [];
public static void Postfix(PlayerControl __instance)
{
if (!AmongUsClient.Instance.AmHost || !GameStates.IsInTask || ExileController.Instance || !Options.EnableMovementChecking.GetBool() || Main.HasJustStarted || !Main.IntroDestroyed || MeetingStates.FirstMeeting || Main.RealOptionsData.GetFloat(FloatOptionNames.PlayerSpeedMod) >= 1.9f || AmongUsClient.Instance.Ping >= 300 || Options.CurrentGameMode == CustomGameMode.NaturalDisasters || Utils.GetRegionName() is not ("EU" or "NA" or "AS") || !__instance || __instance.PlayerId >= 254 || !__instance.IsAlive() || __instance.inVent) return;
Vector2 pos = __instance.Pos();
long now = Utils.TimeStamp;
if (!LastPosition.TryGetValue(__instance.PlayerId, out Vector2 lastPosition))
{
SetCurrentData();
return;
}
if (LastCheck.TryGetValue(__instance.PlayerId, out long lastCheck) && lastCheck == now) return;
SetCurrentData();
if (!FastVector2.DistanceWithinRange(lastPosition, pos, 10f) && PhysicsHelpers.AnythingBetween(__instance.Collider, lastPosition, pos, Constants.ShipOnlyMask, false))
{
if (ExemptedPlayers.Remove(__instance.PlayerId)) return;
EAC.WarnHost();
EAC.Report(__instance, "This player is moving too fast, possibly using a speed hack.");
}
return;
void SetCurrentData()
{
LastPosition[__instance.PlayerId] = pos;
LastCheck[__instance.PlayerId] = now;
}
}
}
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