GroupPolicyHelper

1.0.1

Get-GphGpExtensions.ps1

                                #requires -Version 1.0

function Get-GphGpExtensions {

  <#

      .SYNOPSIS

      Gets all installed Group Policy Extensions from the Registry

      .DESCRIPTION

      All Group Policy Extensions must be registered in the Registry. Get-GPExtension retrieves them from

      HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\GPExtensions and shows them in their 

      processing-order. It can also show the Configuration-Settings of the Extensions by using the Parameter 

      -Showregkeys. 

      .EXAMPLE

      Get-GPExtensions -ShowRegKeys

      Gets all Extension and their Settings

  #>

  [CmdletBinding()]

  param(

    # Get all Registry-Settings for the Extension

    [switch]$ShowRegKeys

  )

  # Unnamed Extension have no name set in the registry. 

  $UnnamedExtensions = @{

    '{35378EAC-683F-11D2-A89A-00C04FBBCFA2}' = 'Registry Settings'

    '{4D2F9B6F-1E52-4711-A382-6A8B1A003DE6}' = 'TS Workspace'

    '{F312195E-3D9D-447A-A3F5-08DFFA24735E}' = 'Device Guard'

    '{FC491EF1-C4AA-4CE1-B329-414B101DB823}' = 'Device Guard'

  }

    $gpExtensionsPath = 'Registry::Hkey_local_machine\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\GPExtensions'

    $SpalteDefault = @{ Name='Extension Name'

                        expression= { if ( $_.'(Default)' ) { $_.'(Default)'} Else { $UnnamedExtensions.($_.PSChildName) } } }

    $SpalteGUID = @{ Name='GUID'

                     expression = { $_.PSChildName }}

    $SelectParam = @{ Property=$SpalteGUID,$SpalteDefault,'ProcessGroupPolicy','DllName' }

    $Extensions = 'Guid',

             'Extension Name',

             'DllName',

             'ProcessGroupPolicy',

             'ProcessGroupPolicyEx',

             'GenerateGroupPolicy',

             'EnableAsynchronousProcessing',

             'ExtensionEventSource',

             'MaxNoGPOListChangesInterval',

             'NoBackgroundPolicy',

             'NoGPOListChanges',

             'NoMachinePolicy',

             'NoSlowLink',

             'NotifyLinkTransition',

             'NoUserPolicy',

             'PerUserLocalSettings',

             'RequiresSuccessfulRegistry'

    If ( $ShowRegKeys ) { 1 | Select-Object -Property $Extensions }

    Get-ChildItem -Path $gpExtensionsPath | ForEach-Object { 

       $Regkeys = $_ | Get-ItemProperty  

       If ( $ShowRegKeys )

       {

            $RegKeys | Select-Object -Property $SpalteGuid,$SpalteDefault,*

       }

       Else 

       {

         if ( $regkeys )

                { $RegKeys | Select-Object @SelectParam }

         Else {$_ | Select-Object @SelectParam }

       }

    }

}