public DllContext(string filePath, bool runHash = true)
{
DLLPath = filePath;
if (!File.Exists(DLLPath))
{
Console.WriteLine($"{DLLPath}: File does not exist");
return;
}
FileName = Path.GetFileName(filePath);
// Compute and store the file hash
if (runHash)
{
using (var cryptoProvider = new SHA1CryptoServiceProvider())
{
SHA1Hash = BitConverter.ToString(cryptoProvider.ComputeHash(File.ReadAllBytes(filePath))).Replace("-", "");
}
}
// Get the module's exports
DllExports = UnmanagedUtility.GetExports(DLLPath);
if (DllExports.Count == 0)
{
Console.WriteLine($"{DLLPath}: No exports, possibly an invalid DLL");
return;
}
// Try to load the library into our process space
dllHandle = UnmanagedUtility.LoadLibrary(filePath);
if (dllHandle == IntPtr.Zero)
{
Console.WriteLine($"{DLLPath}: LoadLibrary failed");
return;
}
// Try to load addresses of all known exports
dllAddressMappings = new Dictionary <string, IntPtr>();
foreach (string knownExport in ExportDefinition.KnownExportedFunctions)
{
if (DllExports.Contains(knownExport))
{
dllAddressMappings.Add(knownExport, UnmanagedUtility.GetProcAddress(dllHandle, knownExport));
}
else
{
dllAddressMappings.Add(knownExport, IntPtr.Zero);
}
}
// Set capabilities
KeyGenerationCapability = DllExports.Contains("GenerateKeyEx") || DllExports.Contains("GenerateKeyExOpt");
ModeSpecified = DllExports.Contains("GetKeyLength") && DllExports.Contains("GetSeedLength") && DllExports.Contains("GetConfiguredAccessTypes");
// Store additional metadata
FileDescription = FileVersionInfo.GetVersionInfo(DLLPath).FileDescription;
LoadAdditionalDataFromDllCalls();
}
public static void DumpExportsToConsole(string modulePath)
{
List <string> exports = UnmanagedUtility.GetExports(modulePath);
Console.WriteLine($"Retrieving exports for {modulePath}");
foreach (string s in exports)
{
Console.WriteLine($"{modulePath}: {s}");
}
Console.WriteLine($"End of {modulePath} exports.");
}
private void MainForm_Load(object sender, EventArgs e)
{
UnmanagedUtility.SendMessage(txtChallenge.Handle, UnmanagedUtility.EM_SETCUEBANNER, 0, "Enter seed data here");
if (!Directory.Exists(Program.GetLibraryPath()))
{
Directory.CreateDirectory(Program.GetLibraryPath());
MessageBox.Show("A library folder to contain DLL files was not found, so an empty folder has been created for you.\r\nThis application requires DLL files that match your ECU to operate.", "Notice");
}
LoadLibraryMetadata();
TryRefreshKey();
}
/*
* Diagnostics function to enumerate all DLLs and get unique exported functions so that the signatures can be built
*
* This is what I have so far:
*
* GenerateKeyExOpt
* GetECUName
* GetConfiguredAccessTypes
* GetSeedLength
* GetKeyLength
* GenerateKeyEx
*
* GetComment
*
* VectorCompressInit
* VectorCompress
* VectorCompressExit
*/
public static void DumpUniqueExportsToConsole(string breakOnSpecificFunction = "")
{
HashSet <string> uniqueExports = new HashSet <string>();
foreach (string filePath in Program.GetLibraryFiles())
{
List <string> exportsForFile = UnmanagedUtility.GetExports(filePath);
foreach (string exportName in exportsForFile)
{
if (exportName == breakOnSpecificFunction)
{
Console.WriteLine($"BREAK: {breakOnSpecificFunction} for {Path.GetFileName(filePath)}");
Console.ReadLine();
}
uniqueExports.Add(exportName);
}
Console.WriteLine(filePath);
}
foreach (string uniqueExportName in uniqueExports)
{
Console.WriteLine(uniqueExportName);
}
}
private void LibrarySelector_Load(object sender, EventArgs e)
{
UnmanagedUtility.SendMessage(txtFilter.Handle, UnmanagedUtility.EM_SETCUEBANNER, 0, "Filter library by file name or ECU name..");
EnableDoubleBuffer(dgvResponse, true);
DrawDatagrid();
}
public void UnloadLibrary()
{
// WARNING: the instance will no longer be able to access native functions after this is called
// This is a workaround if many DLLs have to be enumerated for their metadata -- Windows has a limit on the number of DLLs that can be loaded simultaneously
UnmanagedUtility.FreeLibrary(dllHandle);
}
