WDACConfig

0.3.8

XMLOps/Clear-CiPolicy_Semantic.psm1

                                Function Clear-CiPolicy_Semantic {

    <#

    .SYNOPSIS

        Clears the CI Policy XML file from all nodes except the base nodes

        According to the CI Schema

        It clears any XML file to make it usable as a template for MDE AH CI Policy

    .PARAMETER Path

        The path to the XML file to be processed

    .INPUTS

        System.IO.FileInfo

    .OUTPUTS

        System.Void

    #>

    [CmdletBinding()]

    [OutputType([System.Void])]

    param (

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

    )

    Begin {

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

        . "$ModuleRootPath\CoreExt\PSDefaultParameterValues.ps1"

        # Load the XML file

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

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

        $Ns.AddNamespace('ns', 'urn:schemas-microsoft-com:sipolicy')

    }

    Process {

        # Defining the Nodes to keep and clear, according to the CI Schema

        $NodesToClear = [ordered]@{

            EKUs                                                  = [System.Xml.XmlElement]$Xml.SelectSingleNode('//ns:EKUs', $Ns)

            FileRules                                             = [System.Xml.XmlElement]$Xml.SelectSingleNode('//ns:FileRules', $Ns)

            Signers                                               = [System.Xml.XmlElement]$Xml.SelectSingleNode('//ns:Signers', $Ns)

            UMCI_ProductSigners_Node                              = [System.Xml.XmlElement]$Xml.SelectSingleNode('//ns:SigningScenarios/ns:SigningScenario[@Value="12"]/ns:ProductSigners', $Ns)

            KMCI_ProductSigners_Node                              = [System.Xml.XmlElement]$Xml.SelectSingleNode('//ns:SigningScenarios/ns:SigningScenario[@Value="131"]/ns:ProductSigners', $Ns)

            UMCI_SigningScenario_ProductSigners_FileRulesRef_Node = [System.Xml.XmlElement]$Xml.SelectSingleNode('//ns:SigningScenarios/ns:SigningScenario[@Value="12"]/ns:ProductSigners/ns:FileRulesRef', $Ns)

            KMCI_SigningScenario_ProductSigners_FileRulesRef_Node = [System.Xml.XmlElement]$Xml.SelectSingleNode('//ns:SigningScenarios/ns:SigningScenario[@Value="131"]/ns:ProductSigners/ns:FileRulesRef', $Ns)

            UpdatePolicySignersNode                               = [System.Xml.XmlElement]$Xml.SelectSingleNode('//ns:UpdatePolicySigners', $Ns)

            CiSignersNode                                         = [System.Xml.XmlElement]$Xml.SelectSingleNode('//ns:CiSigners', $Ns)

        }

        foreach ($MainNode in $NodesToClear.Keys) {

            # Get the current node

            [System.Xml.XmlElement]$CurrentNode = $NodesToClear[$MainNode]

            if ($Null -ne $CurrentNode) {

                # Remove all child nodes

                while ($CurrentNode.HasChildNodes) {

                    [System.Void]$CurrentNode.RemoveChild($CurrentNode.FirstChild)

                }

                # Set the node to self close

                $CurrentNode.IsEmpty = $true

            }

        }

    }

    End {

        # Save the modified XML back to the file

        $Xml.Save($Path)

    }

}

Export-ModuleMember -Function 'Clear-CiPolicy_Semantic'

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