WDACConfig

0.3.8

XMLOps/Remove-OrphanAllowedSignersAndCiSigners_IDBased.psm1

                                Function Remove-OrphanAllowedSignersAndCiSigners_IDBased {

    <#

    .SYNOPSIS

        Removes elements with invalid SignerIds from the CiSigners and AllowedSigners nodes in a CI policy XML file

        These are elements with SignerIds that are not found in any <Signer> in the <Signers> node

    .PARAMETER Path

        The path to the CI policy XML file

    .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

        # Create an XmlNamespaceManager for namespace resolution

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

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

        # Get the list of valid signer IDs from the Signers node

        [System.String[]]$ValidSignerIds = $Xml.SelectNodes('//ns:Signers/ns:Signer', $NsManager) | ForEach-Object -Process { $_.ID }

        Function Remove-InvalidSignerIds {

            <#

        .SYNOPSIS

            Removes nodes with invalid SignerIds from the given XmlNodeList

        .INPUTS

            System.Xml.XmlNodeList

        .OUTPUTS

            System.Void

        .PARAMETER NodeList

            The XmlNodeList to remove invalid SignerIds from

        #>

            Param (

                [Parameter(Mandatory = $true)][System.Xml.XmlNodeList]$NodeList

            )

            foreach ($Node in $NodeList) {

                if ($ValidSignerIds -notcontains $Node.SignerId) {

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

                }

            }

        }

    }

    Process {

        # Get CiSigners and AllowedSigners nodes

        [System.Xml.XmlNodeList]$CiSigners = $Xml.SelectNodes('//ns:CiSigners/ns:CiSigner', $NsManager)

        [System.Xml.XmlNodeList]$AllowedSigners12 = $Xml.SelectNodes('//ns:SigningScenarios/ns:SigningScenario[@Value="12"]/ns:ProductSigners/ns:AllowedSigners/ns:AllowedSigner', $NsManager)

        [System.Xml.XmlNodeList]$AllowedSigners131 = $Xml.SelectNodes('//ns:SigningScenarios/ns:SigningScenario[@Value="131"]/ns:ProductSigners/ns:AllowedSigners/ns:AllowedSigner', $NsManager)

        # Remove invalid signer IDs from CiSigners and AllowedSigners

        Remove-InvalidSignerIds $CiSigners

        Remove-InvalidSignerIds $AllowedSigners12

        Remove-InvalidSignerIds $AllowedSigners131

    }

    End {

        # Save the changes to the XML file

        $Xml.Save($Path)

    }

}

Export-ModuleMember -Function 'Remove-OrphanAllowedSignersAndCiSigners_IDBased'

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