WDACConfig

0.3.8

XMLOps/Remove-UnreferencedFileRuleRefs.psm1

                                function Remove-UnreferencedFileRuleRefs {

    <#

    .SYNOPSIS

        Removes <FileRuleRef> elements from the <FileRulesRef> node of each Signing Scenario that are not referenced by any <Allow> element in the <FileRules> node

    .PARAMETER xmlFilePath

        The path to the XML file to be modified

    .INPUTS

        System.IO.FileInfo

    .OUTPUTS

        System.Void

    #>

    [CmdletBinding()]

    [OutputType([System.Void])]

    param (

        [Parameter(Mandatory = $true)][System.IO.FileInfo]$XmlFilePath

    )

    Begin {

        # Importing the $PSDefaultParameterValues to the current session, prior to everything else

        . "$ModuleRootPath\CoreExt\PSDefaultParameterValues.ps1"

        # Load the XML file

        [System.Xml.XmlDocument]$XmlContent = Get-Content $XmlFilePath

    }

    Process {

        # Define the namespace to use with the namespace manager

        [System.Xml.XmlNamespaceManager]$NsManager = New-Object -TypeName System.Xml.XmlNamespaceManager -ArgumentList $XmlContent.NameTable

        $NsManager.AddNamespace('def', 'urn:schemas-microsoft-com:sipolicy')

        # Find all Allow elements and store their IDs

        $AllowedIds = $XmlContent.SelectNodes('//def:Allow', $NsManager) | ForEach-Object -Process { $_.ID }

        # Find all FileRuleRef elements

        $fileRuleRefs = $XmlContent.SelectNodes('//def:FileRuleRef', $NsManager)

        foreach ($fileRuleRef in $fileRuleRefs) {

            # Check if the RuleID attribute is not in the list of allowed IDs

            if ($AllowedIds -notcontains $fileRuleRef.RuleID) {

                # Remove the FileRuleRef element if it's not referenced

                [System.Void]$fileRuleRef.ParentNode.RemoveChild($fileRuleRef)

            }

        }

    }

    End {

        # Save the modified XML back to the file or to a new file

        $XmlContent.Save($XmlFilePath)

    }

}

Export-ModuleMember -Function 'Remove-UnreferencedFileRuleRefs'

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