WDACConfig

0.3.8

XMLOps/Remove-DuplicateFileAttrib_IDBased.psm1

                                Function Remove-DuplicateFileAttrib_IDBased {

    <#

        .SYNOPSIS

            Takes a path to an XML file and removes duplicate FileAttrib elements from the <FileRules> node

            and duplicate FileRuleRef elements from the <ProductSigners> node under each <SigningScenarios> node

            and duplicate FileAttribRef elements from the <Signer> node under each <Signers> node.

            The criteria for removing duplicates is the ID attribute of the FileAttrib elements and the RuleID attribute of the FileRuleRef elements

        .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 {

        # Load the XML file

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

        # Define namespace manager

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

        $NsMgr.AddNamespace('sip', 'urn:schemas-microsoft-com:sipolicy')

    }

    Process {

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

        . "$ModuleRootPath\CoreExt\PSDefaultParameterValues.ps1"

        # Get all FileAttrib elements

        [System.Xml.XmlNodeList]$FileAttribs = $Xml.SelectNodes('//sip:FileRules/sip:FileAttrib', $NsMgr)

        # Track seen FileAttrib IDs

        [System.Collections.Hashtable]$SeenFileAttribIDs = @{}

        # Loop through each FileAttrib element

        foreach ($FileAttrib in $FileAttribs) {

            [System.String]$FileAttribID = $FileAttrib.ID

            # Check if the FileAttrib ID has been seen before

            if ($SeenFileAttribIDs.ContainsKey($FileAttribID)) {

                Write-Verbose -Message "Remove-DuplicateFileAttrib: Removed duplicate FileAttrib with ID: $FileAttribID"

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

            }

            else {

                # If not seen before, add to seen FileAttrib IDs

                $SeenFileAttribIDs[$FileAttribID] = $true

            }

        }

        # Get all ProductSigners under SigningScenarios

        [System.Xml.XmlNodeList]$SigningScenarios = $Xml.SelectNodes('//sip:SigningScenarios/sip:SigningScenario', $NsMgr)

        # Loop through each SigningScenario

        foreach ($Scenario in $SigningScenarios) {

            # Track seen FileRuleRef IDs

            [System.Collections.Hashtable]$SeenFileRuleRefIDs = @{}

            # Get all FileRuleRef elements under ProductSigners

            $FileRuleRefs = $Scenario.ProductSigners.FileRulesRef.FileRuleRef

            # Loop through each FileRuleRef element

            foreach ($FileRuleRef in $FileRuleRefs) {

                [System.String]$FileRuleRefID = $FileRuleRef.RuleID

                # Check if the FileRuleRef ID has been seen before

                if ($SeenFileRuleRefIDs.ContainsKey($FileRuleRefID)) {

                    Write-Verbose -Message "Remove-DuplicateFileAttrib: Removed duplicate FileRuleRef with ID: $FileRuleRefID"

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

                }

                else {

                    # If not seen before, add to seen FileRuleRef IDs

                    $SeenFileRuleRefIDs[$FileRuleRefID] = $true

                }

            }

        }

        # Get all Signers

        [System.Xml.XmlNodeList]$Signers = $Xml.SelectNodes('//sip:Signers/sip:Signer', $NsMgr)

        # Loop through each Signer

        foreach ($Signer in $Signers) {

            # Get all FileAttribRef elements under the Signer

            [System.Xml.XmlElement[]]$FileAttribRefs = $Signer.ChildNodes | Where-Object -FilterScript { $_.Name -eq 'FileAttribRef' }

            # Track seen FileAttribRef IDs

            [System.Collections.Hashtable]$SeenFileAttribRefIDs = @{}

            # Loop through each FileAttribRef element

            foreach ($FileAttribRef in $FileAttribRefs) {

                [System.String]$FileAttribRefID = $FileAttribRef.RuleID

                # Check if the FileAttribRef ID has been seen before

                if ($SeenFileAttribRefIDs.ContainsKey($FileAttribRefID)) {

                    Write-Verbose -Message "Remove-DuplicateFileAttrib: Removed duplicate FileAttribRef with ID: $FileAttribRefID"

                    [System.Void]$Signer.RemoveChild($FileAttribRef)

                }

                else {

                    # If not seen before, add to seen FileAttribRef IDs

                    $SeenFileAttribRefIDs[$FileAttribRefID] = $true

                }

            }

        }

    }

    End {

        # Save the modified XML

        $Xml.Save($XmlFilePath)

    }

}

Export-ModuleMember -Function 'Remove-DuplicateFileAttrib_IDBased'

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