public void RemovePatch()
{
try
{
PurgeFiles();
string[] entryPoint = m_strEntryPoint.Split(new string[] { "::" }, StringSplitOptions.None);
string strTempFile = m_strGameAssemblyPath + Constants.VORTEX_BACKUP_TAG;
File.Copy(m_strGameAssemblyPath, strTempFile, true);
using (AssemblyDefinition unityAssembly = AssemblyDefinition.ReadAssembly(strTempFile, new ReaderParameters {
ReadWrite = true
}))
{
if (!IsInjected(unityAssembly, entryPoint))
{
return;
}
TypeDefinition type = unityAssembly.MainModule.GetType(entryPoint[0]);
if ((type == null) || !type.IsClass)
{
throw new EntryPointNotFoundException("Invalid type");
}
MethodDefinition methodDefinition = type.Methods.FirstOrDefault(meth => meth.Name == entryPoint[1]);
if ((methodDefinition == null) || !methodDefinition.HasBody)
{
throw new EntryPointNotFoundException("Invalid method");
}
var instructions = methodDefinition.Body.Instructions
.Where(instr => instr.OpCode == OpCodes.Call)
.ToArray();
Instruction patcherInstr = instructions.FirstOrDefault(instr =>
instr.Operand.ToString().Contains(Constants.VORTEX_PATCH_METHOD));
methodDefinition.Body.Instructions.Remove(patcherInstr);
unityAssembly.Write(m_strGameAssemblyPath);
}
}
catch (Exception exc)
{
Enums.EErrorCode errorCode = Enums.EErrorCode.UNKNOWN;
Util.RestoreBackup(m_strGameAssemblyPath);
if (exc is FileNotFoundException)
{
errorCode = Enums.EErrorCode.MISSING_FILE;
}
else if (exc is EntryPointNotFoundException)
{
errorCode = Enums.EErrorCode.INVALID_ENTRYPOINT;
}
string strMessage = "Failed to remove patcher.";
string strResponse = JSONResponse.CreateSerializedResponse(strMessage, errorCode, exc);
Console.Error.WriteLine(strResponse);
Environment.Exit((int)(errorCode));
}
}
internal static string CreateSerializedResponse(string message, dynamic code, Exception exc = null)
{
JSONResponse response = new JSONResponse();
response.Message = message;
response.ErrorCode = (int)(code);
response.RaisedException = exc;
return(JsonConvert.SerializeObject(response));
}
internal static void DeleteTemp(string strFilePath)
{
try
{
File.Delete(strFilePath);
}
catch (Exception exc)
{
string strMessage = "Failed to delete temporary file";
string strResponse = JSONResponse.CreateSerializedResponse(strMessage, Enums.EErrorCode.UNKNOWN, exc);
Console.Error.WriteLine(strResponse);
}
}
internal static void ReplaceFile(string strOld, string strNew)
{
try
{
BackupFile(strOld, true);
File.Delete(strOld);
File.Copy(strNew, strOld);
}
catch (Exception exc)
{
RestoreBackup(strOld);
string strMessage = "Failed to replace file";
string strResponse = JSONResponse.CreateSerializedResponse(strMessage, Enums.EErrorCode.FILE_OPERATION_ERROR, exc);
Console.Error.WriteLine(strResponse);
}
}
/// <summary>
/// Certain games distribute modified assemblies which disable
/// reflection and impede modding.
/// </summary>
private void EnableReflection(string strDataPath)
{
string strMscorlib = Path.Combine(strDataPath, Constants.MSCORLIB);
FileVersionInfo fvi = FileVersionInfo.GetVersionInfo(strMscorlib);
string version = fvi.FileVersion;
string strLib = LIB_REPLACEMENTS
.Where(replacement => replacement.Substring(Constants.MSCORLIB.Length + 1, 1) == version.Substring(0, 1))
.SingleOrDefault();
if (null != strLib)
{
try
{
WebClient wc = new WebClient();
Uri uri = new Uri(Constants.GITHUB_LINK + strLib);
wc.DownloadDataAsync(uri, Path.Combine(strDataPath, strLib));
wc.DownloadDataCompleted += (sender, e) =>
{
string strFileName = e.UserState.ToString();
File.WriteAllBytes(strFileName, e.Result);
Util.ReplaceFile(strMscorlib, strFileName);
m_eInjectorState = Enums.EInjectorState.FINISHED;
};
}
catch (Exception exc)
{
m_eInjectorState = Enums.EInjectorState.FINISHED;
string strMessage = "Unhandled mscorlib version.";
Enums.EErrorCode err = Enums.EErrorCode.MISSING_FILE;
string strResponse = JSONResponse.CreateSerializedResponse(strMessage, err, exc);
Console.Error.WriteLine(strResponse);
Environment.Exit((int)(err));
}
}
else
{
m_eInjectorState = Enums.EInjectorState.FINISHED;
string strMessage = "Unhandled mscorlib version.";
Enums.EErrorCode err = Enums.EErrorCode.UNHANDLED_FILE_VERSION;
string strResponse = JSONResponse.CreateSerializedResponse(strMessage, err);
Console.Error.WriteLine(strResponse);
Environment.Exit((int)(err));
}
}
public Injector(string strDataPath, string strEntryPoint)
{
try
{
m_strDataPath = strDataPath;
m_strEntryPoint = strEntryPoint;
m_strGameAssemblyPath = Path.Combine(strDataPath, Constants.UNITY_ASSEMBLY_LIB);
m_strModsDirectory = Path.Combine(strDataPath, Constants.MODS_DIRNAME);
m_resolver = new MissingAssemblyResolver(strDataPath);
}
catch (Exception exc)
{
Enums.EErrorCode errorCode = Enums.EErrorCode.INVALID_ARGUMENT;
string strMessage = "Injector received invalid argument.";
string strResponse = JSONResponse.CreateSerializedResponse(strMessage, errorCode, exc);
Console.Error.WriteLine(strResponse);
Environment.Exit((int)(errorCode));
}
}
public void Inject()
{
m_eInjectorState = Enums.EInjectorState.RUNNING;
string strTempFile = null;
AssemblyDefinition unityAssembly = null;
try
{
// Ensure we have reflection enabled - there's no point
// in continuing if reflection is disabled.
if (!Util.IsReflectionEnabled(m_strDataPath))
{
EnableReflection(m_strDataPath);
}
else
{
m_eInjectorState = Enums.EInjectorState.FINISHED;
}
// Deploy patcher related files.
DeployFiles();
// Start the patching process.
string[] patcherPoints = Constants.VORTEX_PATCH_METHOD.Split(new string[] { "::" }, StringSplitOptions.None);
string[] entryPoint = m_strEntryPoint.Split(new string[] { "::" }, StringSplitOptions.None);
strTempFile = Util.GetTempFile(m_strGameAssemblyPath);
using (unityAssembly = AssemblyDefinition.ReadAssembly(strTempFile,
new ReaderParameters {
ReadWrite = true, AssemblyResolver = m_resolver
}))
{
if (IsInjected(unityAssembly, entryPoint))
{
unityAssembly.Dispose();
Util.DeleteTemp(strTempFile);
return;
}
// Back up the game assembly before we do anything.
Util.BackupFile(m_strGameAssemblyPath);
AssemblyDefinition vrtxPatcher = AssemblyDefinition.ReadAssembly(Path.Combine(m_strDataPath, Constants.VORTEX_LIB));
MethodDefinition patcherMethod = vrtxPatcher.MainModule.GetType(patcherPoints[0]).Methods.First(x => x.Name == patcherPoints[1]);
TypeDefinition type = unityAssembly.MainModule.GetType(entryPoint[0]);
if ((type == null) || !type.IsClass)
{
throw new EntryPointNotFoundException("Invalid entry point");
}
MethodDefinition methodDefinition = type.Methods.FirstOrDefault(meth => meth.Name == entryPoint[1]);
if ((methodDefinition == null) || !methodDefinition.HasBody)
{
throw new EntryPointNotFoundException("Invalid entry point");
}
methodDefinition.Body.GetILProcessor().InsertBefore(methodDefinition.Body.Instructions[0], Instruction.Create(OpCodes.Call, methodDefinition.Module.ImportReference(patcherMethod)));
unityAssembly.Write(m_strGameAssemblyPath);
unityAssembly.Dispose();
Util.DeleteTemp(strTempFile);
}
}
catch (Exception exc)
{
Enums.EErrorCode errorCode = Enums.EErrorCode.UNKNOWN;
if (unityAssembly != null)
{
unityAssembly.Dispose();
}
if (strTempFile != null)
{
Util.DeleteTemp(strTempFile);
}
Util.RestoreBackup(m_strGameAssemblyPath);
if (exc is FileNotFoundException)
{
errorCode = Enums.EErrorCode.MISSING_FILE;
}
else if (exc is EntryPointNotFoundException)
{
errorCode = Enums.EErrorCode.INVALID_ENTRYPOINT;
}
string strMessage = "Failed to inject patcher.";
string strResponse = JSONResponse.CreateSerializedResponse(strMessage, errorCode, exc);
Console.Error.WriteLine(strResponse);
Environment.Exit((int)(errorCode));
}
while (InjectorState != Enums.EInjectorState.FINISHED)
{
// Do nothing.
}
}
static void RunOptions(string [] args)
{
bool removePatch = false;
bool showHelp = false;
// (The -q argument should be used on its own as all other arguments will be ignored)
// string will hold the path to the assembly we want to check for the .NET version.
// if an absolute path is not provided, Vortex will assume that we're looking for Unity's
// default assembly (Assembly-CSharp.dll)
// This is currently used by Vortex to ascertain which .NET version we want to use when
// building VIGO.
string queryNETAssembly = string.Empty;
// (This -a should be used on its own as all other arguments will be ignored)
// string will hold both the path to the assembly we want to load and the
// assembly name reference we want to verify. Value should have the following
// format: "{Assembly_Path}::{Assembly_Name}" e.g. "C:/somePath/assembly.dll::mscorlib"
string queryAssemblyName = string.Empty;
OptionSet options = new OptionSet()
.Add("h", "Shows this message and closes program", h => showHelp = h != null)
.Add("g|extension=", "Path to the game's extension folder", g => m_strExtensionPath = g)
.Add("m|managed=", "Path to the game's managed folder/game assembly", m => m_dataPath = m)
.Add("i|install=", "Path to Harmony Patcher's build folder.", i => m_installPath = i)
.Add("e|entry=", "This game's entry point formatted as: 'Namespace.ClassName::MethodName'", e => m_entryPoint = e)
.Add("x|modsfolder=", "The game's expected mods directory", x => m_modsfolder = x)
.Add("r", "Will remove the harmony patcher", r => removePatch = r != null)
.Add("q|querynet=", "(optional) Query the .NET version of the assembly file we attempt to patch", q => queryNETAssembly = q)
.Add("v", "(optional) Used to decide whether we want to use VIGO or not", v => m_injectVIGO = v != null)
.Add("a|queryassemblyname=", "(optional) Used to check assembly references. Expected format: 'Assembly_Path::Assembly_Name'", a => queryAssemblyName = a);
List <string> extra;
try {
extra = options.Parse(args);
} catch (OptionException) {
showHelp = true;
}
if (showHelp || (args.Length == 0))
{
ShowHelp(options);
return;
}
if (!string.IsNullOrEmpty(queryNETAssembly))
{
const string FRAMEWORK_PREFIX = "FrameworkVersion=";
bool bFoundVersion = false;
string assemblyFile = (queryNETAssembly.EndsWith(".dll"))
? queryNETAssembly : Path.Combine(queryNETAssembly, Constants.UNITY_ASSEMBLY_LIB);
//AssemblyName assemblyName = Util.FindAssemblyRef (assemblyFile, "mscorlib");
AssemblyName assemblyName = null;
if (assemblyName != null)
{
// Found a reference, but surprisingly the local mscorlib assembly itself might have
// a higher version; we need to check the local file.
string localLib = Path.Combine(Path.GetDirectoryName(assemblyFile), "mscorlib.dll");
string version = (File.Exists(localLib))
? System.Diagnostics.FileVersionInfo.GetVersionInfo(localLib).FileVersion
: assemblyName.Version.ToString();
Console.WriteLine($"{FRAMEWORK_PREFIX}{version}");
bFoundVersion = true;
}
// We couldn't find a NET reference - lets see if there's a mscorlib assembly
// next to the game assembly.
string potentialMscorlibFilePath = Path.Combine(Path.GetDirectoryName(assemblyFile), "mscorlib.dll");
if (!bFoundVersion && File.Exists(potentialMscorlibFilePath))
{
string version = System.Diagnostics.FileVersionInfo.GetVersionInfo(potentialMscorlibFilePath).FileVersion;
Console.WriteLine($"{FRAMEWORK_PREFIX}{version}");
bFoundVersion = true;
}
if (!bFoundVersion)
{
// We will have to rely on the assembly's runtime version.
Assembly gameAss = Assembly.ReflectionOnlyLoadFrom(assemblyFile);
Console.WriteLine($"{FRAMEWORK_PREFIX}{gameAss.ImageRuntimeVersion}");
}
// This is a query operation, as mentioned above
// we're not going to patch the game assembly.
return;
}
if (!string.IsNullOrEmpty(queryAssemblyName))
{
string [] parsed = queryAssemblyName.Split(new string [] { "::" }, StringSplitOptions.None);
if (parsed.Length != 2)
{
string strError = JSONResponse.CreateSerializedResponse("Invalid value, please respect format: 'Assembly_Path::Ref_Assembly_Name'", 1);
Console.Error.WriteLine(strError);
return;
}
string assemblyFile = (parsed [0].EndsWith(".dll"))
? parsed [0] : Path.Combine(parsed [0], Constants.UNITY_ASSEMBLY_LIB);
//AssemblyName assemblyName = Util.FindAssemblyRef (assemblyFile, parsed [1]);
AssemblyName assemblyName = null;
if (assemblyName != null)
{
Console.WriteLine($"FoundAssembly={assemblyName.FullName}");
}
// This is a query operation, as mentioned above
// we're not going to patch the game assembly.
return;
}
Run(removePatch);
}
