private static IntPtr FindProxyDllInfo(SafeLibraryHandle lib, Guid clsid)
{
try
{
GetProxyDllInfo get_proxy_dllinfo = lib.GetFunctionPointer <GetProxyDllInfo>();
IntPtr pInfo;
IntPtr pId;
get_proxy_dllinfo(out pInfo, out pId);
return(pInfo);
}
catch (Win32Exception)
{
}
IntPtr psfactory = IntPtr.Zero;
try
{
DllGetClassObject dll_get_class_object = lib.GetFunctionPointer <DllGetClassObject>();
Guid IID_IPSFactoryBuffer = COMInterfaceEntry.IID_IPSFactoryBuffer;
int hr = dll_get_class_object(ref clsid, ref IID_IPSFactoryBuffer, out psfactory);
if (hr != 0)
{
throw new Win32Exception(hr);
}
// The PSFactoryBuffer object seems to be structured like on Win10 at least.
// VTABLE*
// Reference Count
// ProxyFileInfo*
IntPtr pInfo = Marshal.ReadIntPtr(psfactory, 2 * IntPtr.Size);
// TODO: Should add better checks here,
// for example VTable should be in COMBASE and the pointer should be in the
// server DLL's rdata section. But this is probably good enough for now.
using (SafeLibraryHandle module = COMUtilities.SafeGetModuleHandle(pInfo))
{
if (module == null || lib.DangerousGetHandle() != module.DangerousGetHandle())
{
return(IntPtr.Zero);
}
}
return(pInfo);
}
catch (Win32Exception)
{
return(IntPtr.Zero);
}
finally
{
if (psfactory != IntPtr.Zero)
{
Marshal.Release(psfactory);
}
}
}
private void btnOK_Click(object sender, EventArgs e)
{
bool valid_dll = false;
try
{
using (SafeLibraryHandle lib = COMUtilities.SafeLoadLibrary(textBoxDbgHelp.Text))
{
if (lib.GetFunctionPointer("SymInitializeW") != IntPtr.Zero)
{
valid_dll = true;
}
}
}
catch (Win32Exception)
{
}
if (!valid_dll)
{
MessageBox.Show(this, "Invalid DBGHELP.DLL file", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
if (Environment.Is64BitProcess)
{
Properties.Settings.Default.DbgHelpPath64 = textBoxDbgHelp.Text;
}
else
{
Properties.Settings.Default.DbgHelpPath32 = textBoxDbgHelp.Text;
}
Properties.Settings.Default.SymbolPath = textBoxSymbolPath.Text;
Properties.Settings.Default.SymbolsConfigured = true;
try
{
Properties.Settings.Default.Save();
}
catch (Exception ex)
{
Program.ShowError(this, ex);
}
DialogResult = DialogResult.OK;
Close();
}
private void GetFunc <T>(ref T f) where T : class
{
f = _dbghelp_lib.GetFunctionPointer <T>();
}