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using System.ComponentModel;
using System.Diagnostics;
using System.Reflection;
using Agent.Windows.Security;
using Windows.Win32;
using Windows.Win32.NetworkManagement.WindowsFilteringPlatform;
namespace Agent.Windows.Diagnostics;
public sealed record WindowsPlatformCheckResult(
bool PlatformSupported,
bool ApplicationProfileAvailable,
bool BfeEngineOpen,
bool HelperAvailable,
bool HelperVersionCompatible,
int? ErrorCode,
string? ErrorOperation)
{
public bool Success => PlatformSupported && ApplicationProfileAvailable && BfeEngineOpen && HelperAvailable && HelperVersionCompatible;
}
public static class WindowsPlatformCheck
{
public static WindowsPlatformCheckResult Run(string helperPath)
{
bool platform = OperatingSystem.IsWindowsVersionAtLeast(10, 0, 26100);
bool profile = false;
bool bfe = false;
bool helper = File.Exists(helperPath);
bool version = false;
try
{
_ = AppContainerProfile.DeriveFixed();
profile = true;
using FwpmEngineClose0SafeHandle engine = OpenBfeReadOnly();
bfe = true;
if (helper)
{
Version? current = Assembly.GetEntryAssembly()?.GetName().Version;
string candidate = FileVersionInfo.GetVersionInfo(helperPath).FileVersion ?? "";
version = current is not null && HasSameReleaseIdentity(current, candidate);
}
return new(platform, profile, bfe, helper, version, null, null);
}
catch (Win32Exception ex) { return new(platform, profile, bfe, helper, version, ex.NativeErrorCode, ex.Message); }
catch (Exception ex) when (ex is UnauthorizedAccessException or InvalidOperationException or IOException)
{ return new(platform, profile, bfe, helper, version, ex.HResult, ex.Message); }
}
internal static bool HasSameReleaseIdentity(Version current, string candidate)
{
if (!Version.TryParse(candidate, out Version? parsed)) return false;
return current.Major == parsed.Major && current.Minor == parsed.Minor && current.Build == parsed.Build;
}
private static FwpmEngineClose0SafeHandle OpenBfeReadOnly()
{
uint result = PInvoke.FwpmEngineOpen0(10, null, null, out FwpmEngineClose0SafeHandle engine);
if (result != 0) throw new Win32Exception(unchecked((int)result), $"FwpmEngineOpen0 failed with WFP/Win32 error 0x{result:X8}.");
return engine;
}
}
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