private static uint WinVerifyTrust(string fileName)
{
var wintrust_action_generic_verify_v2 = new Guid("{00AAC56B-CD44-11d0-8CC2-00C04FC295EE}");
uint result;
using (var fileInfo = new WINTRUST_FILE_INFO(fileName, Guid.Empty))
using (var guidPtr = new UnmanagedPointer(
Marshal.AllocHGlobal(Marshal.SizeOf(typeof(Guid))),
AllocMethod.HGlobal)
)
using (var wvtDataPtr = new UnmanagedPointer(
Marshal.AllocHGlobal(Marshal.SizeOf(typeof(WINTRUST_DATA))),
AllocMethod.HGlobal)
)
{
var data = new WINTRUST_DATA(fileInfo);
IntPtr pGuid = guidPtr;
IntPtr pData = wvtDataPtr;
Marshal.StructureToPtr(wintrust_action_generic_verify_v2, pGuid, true);
Marshal.StructureToPtr(data, pData, true);
result = WinVerifyTrust(IntPtr.Zero, pGuid, pData);
}
return(result);
}
public void Dispose()
{
if (dwUnionChoice == UnionChoice.File)
{
var info = new WINTRUST_FILE_INFO();
Marshal.PtrToStructure(pInfoStruct, info);
info.Dispose();
Marshal.DestroyStructure(pInfoStruct, typeof(WINTRUST_FILE_INFO));
}
Marshal.FreeHGlobal(pInfoStruct);
}
public WINTRUST_DATA(WINTRUST_FILE_INFO fileInfo)
{
cbStruct = (uint)Marshal.SizeOf(typeof(WINTRUST_DATA));
pInfoStruct = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(WINTRUST_FILE_INFO)));
Marshal.StructureToPtr(fileInfo, pInfoStruct, false);
dwUnionChoice = UnionChoice.File;
pPolicyCallbackData = IntPtr.Zero;
pSIPCallbackData = IntPtr.Zero;
dwUIChoice = UiChoice.NoUI;
fdwRevocationChecks = RevocationCheckFlags.None;
dwStateAction = StateAction.Ignore;
hWVTStateData = IntPtr.Zero;
pwszURLReference = IntPtr.Zero;
dwProvFlags = TrustProviderFlags.Safer;
dwUIContext = UIContext.Execute;
}