From cbbd92cde6a3c1103ab71fe5c453ec8e017bfb7d Mon Sep 17 00:00:00 2001
From: h3xds1nz <gamingshard@protonmail.com>
Date: Thu, 24 Oct 2024 10:59:12 +0200
Subject: [PATCH] Remove AssemblyFilter dead code as APTCA is not supported
 (#9863)

---
 .../MS/Internal/AppModel/AssemblyFilter.cs    | 115 ------------------
 .../PresentationFramework.csproj              |   1 -
 2 files changed, 116 deletions(-)
 delete mode 100644 src/Microsoft.DotNet.Wpf/src/PresentationFramework/MS/Internal/AppModel/AssemblyFilter.cs

diff --git a/src/Microsoft.DotNet.Wpf/src/PresentationFramework/MS/Internal/AppModel/AssemblyFilter.cs b/src/Microsoft.DotNet.Wpf/src/PresentationFramework/MS/Internal/AppModel/AssemblyFilter.cs
deleted file mode 100644
index 32c57d08da6..00000000000
--- a/src/Microsoft.DotNet.Wpf/src/PresentationFramework/MS/Internal/AppModel/AssemblyFilter.cs
+++ /dev/null
@@ -1,115 +0,0 @@
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-// See the LICENSE file in the project root for more information.
-
-// 
-// Description:
-//              This class is used to filter assemblies as they are loaded into an application domain.
-//              The intent is to bring the AppDomain down in the case that one of these is on a disallowed list
-//              similar to the kill bit for Activex
-//
-
-using System;
-using System.Windows;
-using MS.Internal.PresentationFramework;
-using System.Collections.Generic;
-using MS.Win32;
-using Microsoft.Win32;
-using System.Security;
-using System.Reflection;
-using System.Text;
-using MS.Internal.AppModel;
-using MS.Internal;
-using System.Windows.Resources;
-using System.Diagnostics;
-using System.Runtime.InteropServices;
-
-
-namespace MS.Internal
-{
-    internal class AssemblyFilter
-    {
-        static AssemblyFilter()
-        {
-            _disallowedListExtracted = false;
-            _assemblyList = new System.Collections.Generic.List<string>();
-        }
-
-        internal void FilterCallback(Object sender, AssemblyLoadEventArgs args)
-        {
-            /* This method no longer applies to .NET Core and should be removed. */
-        }
-
-        //appends assembly name with file version to generate a unique entry for the assembly lookup process
-        private string AssemblyNameWithFileVersion(Assembly a)
-        {
-            FileVersionInfo fileVersionInfo;
-            StringBuilder sb = new StringBuilder(a.FullName);
-
-            fileVersionInfo = FileVersionInfo.GetVersionInfo(a.Location);
-            if (fileVersionInfo != null && fileVersionInfo.ProductVersion != null)
-            {
-                sb.Append(FILEVERSION_STRING + fileVersionInfo.ProductVersion);
-            }
-            return ((sb.ToString()).ToLower(System.Globalization.CultureInfo.InvariantCulture)).Trim();
-        }
-
-        private bool AssemblyOnDisallowedList(String assemblyToCheck)
-        {
-            bool retVal = false;
-            // if the list disallowed list is not populated populate it once
-            if (_disallowedListExtracted == false)
-            {
-                // hit the registry one time and read 
-                ExtractDisallowedRegistryList();
-                _disallowedListExtracted = true;
-            }
-            if (_assemblyList.Contains(assemblyToCheck))
-            {
-                retVal = true;
-            }
-            return retVal;
-        }
-
-        private void ExtractDisallowedRegistryList()
-        {
-            string[] disallowedAssemblies;
-            RegistryKey featureKey;
-
-            // open the key and read the value
-            featureKey = Registry.LocalMachine.OpenSubKey(KILL_BIT_REGISTRY_LOCATION);
-            if (featureKey != null)
-            {
-                // Enumerate through all keys and populate dictionary
-                disallowedAssemblies = featureKey.GetSubKeyNames();
-                // iterate over this list and for each extract the APTCA_FLAG value and set it in the 
-                // dictionary
-                foreach (string assemblyName in disallowedAssemblies)
-                {
-                    featureKey = Registry.LocalMachine.OpenSubKey($@"{KILL_BIT_REGISTRY_LOCATION}\{assemblyName}");
-                    object keyValue = featureKey.GetValue(SUBKEY_VALUE);
-                    // if there exists a value and it is 1 add to hash table
-                    if ((keyValue != null) && (int)(keyValue) == 1)
-                    {
-                        if (!_assemblyList.Contains(assemblyName))
-                        {
-                            _assemblyList.Add(assemblyName.ToLower(System.Globalization.CultureInfo.InvariantCulture).Trim());
-                        }
-                    }
-                }
-            }
-        }
-
-        static System.Collections.Generic.List<string> _assemblyList;
-
-        static bool _disallowedListExtracted;
-
-        static readonly object _lock = new object();
-
-        private const string FILEVERSION_STRING = @", FileVersion=";
-        // This is the location in the registry where all the keys are stored
-        private const string KILL_BIT_REGISTRY_HIVE = @"HKEY_LOCAL_MACHINE\";
-        private const string KILL_BIT_REGISTRY_LOCATION = @"Software\Microsoft\.NetFramework\policy\APTCA";
-        private const string SUBKEY_VALUE = @"APTCA_FLAG";
-    }
-}
diff --git a/src/Microsoft.DotNet.Wpf/src/PresentationFramework/PresentationFramework.csproj b/src/Microsoft.DotNet.Wpf/src/PresentationFramework/PresentationFramework.csproj
index 28168bbd37b..e89b7dccd99 100644
--- a/src/Microsoft.DotNet.Wpf/src/PresentationFramework/PresentationFramework.csproj
+++ b/src/Microsoft.DotNet.Wpf/src/PresentationFramework/PresentationFramework.csproj
@@ -106,7 +106,6 @@
     <Compile Include="MS\Internal\Annotations\XmlElementCollection.cs" />
     <Compile Include="MS\Internal\AppModel\AppModelKnownContentFactory.cs" />
     <Compile Include="MS\Internal\AppModel\AppSecurityManager.cs" />
-    <Compile Include="MS\Internal\AppModel\AssemblyFilter.cs" />
     <Compile Include="MS\Internal\AppModel\BamlStream.cs" />
     <Compile Include="MS\Internal\AppModel\ComGuids.cs" />
     <Compile Include="MS\Internal\AppModel\ContentFilePart.cs" />