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Fixed permissions for "Fix Video Sync"

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This commit is contained in:
Yoshi Askharoun
2021-05-26 11:32:53 -05:00
parent 454bc8f07f
commit 415f9c1b45
3 changed files with 108 additions and 11 deletions
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ZuneModCore/Mods/VideoSyncMod.cs
+34 -11
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@@ -2,7 +2,10 @@
using System;
using System.Collections.Generic;
using System.IO;
using System.Security.AccessControl;
using System.Security.Principal;
using System.Threading.Tasks;
using ZuneModCore.Win32;
namespace ZuneModCore.Mods
{
@@ -21,34 +24,54 @@ namespace ZuneModCore.Mods
public override AbstractUIElementGroup? OptionsUI => null;
#pragma warning disable CA1416 // Validate platform compatibility
public override Task<string?> Apply()
{
// Make a backup of the file
File.Copy(WMVCORE_PATH, Path.Combine(StorageDirectory, "WMVCORE.original.dll"), true);
// Get the working WMVCORE.dll
string sourcePath = Path.Combine(
Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location)!, "Resources\\WMVCORE.dll");
// Get the original WMVCORE.dll
FileInfo wmvDllInfo = new(WMVCORE_PATH);
try
{
// Make a backup of the file
File.Copy(WMVCORE_PATH, Path.Combine(StorageDirectory, "WMVCORE.original.dll"), true);
// Activate necessary admin privileges to make changes without NTFS perms
TokenManipulator.AddPrivilege("SeRestorePrivilege"); // Necessary to set Owner Permissions
TokenManipulator.AddPrivilege("SeBackupPrivilege"); // Necessary to bypass Traverse Checking
TokenManipulator.AddPrivilege("SeTakeOwnershipPrivilege"); // Necessary to override FilePermissions
// NOTE: This is quite dangerous to do blindly, so let's not do this
// Kill processes that are using WMVCORE.dll
//foreach (System.Diagnostics.Process proc in FileUtil.WhoIsLocking(WMVCORE_PATH))
//{
// proc.Kill();
//}
// Get access control
FileSecurity security = wmvDllInfo.GetAccessControl();
SecurityIdentifier? cu = WindowsIdentity.GetCurrent().User;
if (cu == null)
return Task.FromResult<string?>("Failed to set permissions on WMVCORE.dll, current user was null");
// Get the working WMVCORE.dll
string sourcePath = Path.Combine(
Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location)!, "Resources\\WMVCORE.dll");
// Set owner to current user
security.SetOwner(cu);
security.SetAccessRule(new FileSystemAccessRule(cu, FileSystemRights.Modify, AccessControlType.Allow));
// Update the Access Control on the original WMVCORE.dll
wmvDllInfo.SetAccessControl(security);
// Copy the pre-Anniversary Update WMVCORE.dll
File.Copy(sourcePath, WMVCORE_PATH, true);
return Task.FromResult<string?>(null);
}
catch (IOException)
{
return Task.FromResult<string?>($"Unable to replace '{wmvDllInfo.FullName}'. Verify that Zune and Windows Media Player are not running and try again.");
}
catch (Exception ex)
{
return Task.FromResult(ex.Message)!;
}
}
#pragma warning restore CA1416 // Validate platform compatibility
public override Task<string?> Reset()
{