WDACConfig

0.3.8

XMLOps/New-PublisherLevelRules.psm1

                                Function New-PublisherLevelRules {

    <#

    .SYNOPSIS

        Creates new Publisher level rules in an XML file

        Each rules includes the Signers, AllowedSigners, and CiSigners (depending on kernel/user mode)

    .PARAMETER PublisherSigners

        The PublisherSigners to be used for creating the rules, they are the output of the Build-SignerAndHashObjects function

    .PARAMETER XmlFilePath

        The path to the XML file to be modified

    .INPUTS

        PSCustomObject[]

        System.IO.FileInfo

    .OUTPUTS

        System.Void

    #>

    [CmdletBinding()]

    [OutputType([System.Void])]

    Param (

        [Parameter(Mandatory = $true)][PSCustomObject[]]$PublisherSigners,

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

    )

    Begin {

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

        . "$ModuleRootPath\CoreExt\PSDefaultParameterValues.ps1"

        Write-Verbose -Message "New-PublisherLevelRules: There are $($PublisherSigners.Count) Publisher Signers to be added to the XML file"

        # Load the XML file

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

        # Define the namespace manager

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

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

        # Find the Signers Node

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

        # Find the ProductSigners Nodes

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

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

        # Find the CiSigners Node

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

    }

    Process {

        foreach ($PublisherData in $PublisherSigners) {

            #Region Creating Signers

            # Create signer for each certificate details in the PublisherSigners

            # Some files are signed by multiple signers

            foreach ($SignerData in $PublisherData.CertificateDetails) {

                [System.String]$Guid = [System.Guid]::NewGuid().ToString().replace('-', '').ToUpper()

                [System.String]$SignerID = "ID_SIGNER_B_$Guid"

                # Create the new Signer element

                [System.Xml.XmlElement]$NewSignerNode = $Xml.CreateElement('Signer', $SignersNode.NamespaceURI)

                $NewSignerNode.SetAttribute('ID', $SignerID)

                $NewSignerNode.SetAttribute('Name', $SignerData.IntermediateCertName)

                # Create the CertRoot element and add it to the Signer element

                [System.Xml.XmlElement]$CertRootNode = $Xml.CreateElement('CertRoot', $SignersNode.NamespaceURI)

                $CertRootNode.SetAttribute('Type', 'TBS')

                $CertRootNode.SetAttribute('Value', $SignerData.IntermediateCertTBS)

                [System.Void]$NewSignerNode.AppendChild($CertRootNode)

                # Create the CertPublisher element and add it to the Signer element

                [System.Xml.XmlElement]$CertPublisherNode = $Xml.CreateElement('CertPublisher', $SignersNode.NamespaceURI)

                $CertPublisherNode.SetAttribute('Value', $SignerData.LeafCertName)

                [System.Void]$NewSignerNode.AppendChild($CertPublisherNode)

                # Add the new Signer element to the Signers node

                [System.Void]$SignersNode.AppendChild($NewSignerNode)

                #Region Adding signer to the Signer Scenario and CiSigners

                # For User-Mode files

                if ($PublisherData.SiSigningScenario -eq '1') {

                    # Check if AllowedSigners node exists, if not, create it

                    $UMCI_Temp_AllowedSignersNode = $UMCI_ProductSigners_Node.SelectSingleNode('ns:AllowedSigners', $Ns)

                    if ($Null -eq $UMCI_Temp_AllowedSignersNode) {

                        [System.Xml.XmlElement]$UMCI_Temp_AllowedSignersNode = $Xml.CreateElement('AllowedSigners', $Ns.LookupNamespace('ns'))

                        [System.Void]$UMCI_ProductSigners_Node.AppendChild($UMCI_Temp_AllowedSignersNode)

                    }

                    # Create Allowed Signers inside the <AllowedSigners> -> <ProductSigners> -> <SigningScenario Value="12">

                    [System.Xml.XmlElement]$NewUMCIAllowedSignerNode = $Xml.CreateElement('AllowedSigner', $UMCI_Temp_AllowedSignersNode.NamespaceURI)

                    $NewUMCIAllowedSignerNode.SetAttribute('SignerId', $SignerID)

                    [System.Void]$UMCI_Temp_AllowedSignersNode.AppendChild($NewUMCIAllowedSignerNode)

                    # Create a CI Signer for the User Mode Signer

                    [System.Xml.XmlElement]$NewCiSignerNode = $Xml.CreateElement('CiSigner', $CiSignersNode.NamespaceURI)

                    $NewCiSignerNode.SetAttribute('SignerId', $SignerID)

                    [System.Void]$CiSignersNode.AppendChild($NewCiSignerNode)

                }

                # For Kernel-Mode files

                elseif ($PublisherData.SiSigningScenario -eq '0') {

                    # Check if AllowedSigners node exists, if not, create it

                    $KMCI_Temp_AllowedSignersNode = $KMCI_ProductSigners_Node.SelectSingleNode('ns:AllowedSigners', $Ns)

                    if ($Null -eq $KMCI_Temp_AllowedSignersNode) {

                        [System.Xml.XmlElement]$KMCI_Temp_AllowedSignersNode = $Xml.CreateElement('AllowedSigners', $Ns.LookupNamespace('ns'))

                        [System.Void]$KMCI_ProductSigners_Node.AppendChild($KMCI_Temp_AllowedSignersNode)

                    }

                    # Create Allowed Signers inside the <AllowedSigners> -> <ProductSigners> -> <SigningScenario Value="131">

                    [System.Xml.XmlElement]$NewKMCIAllowedSignerNode = $Xml.CreateElement('AllowedSigner', $KMCI_Temp_AllowedSignersNode.NamespaceURI)

                    $NewKMCIAllowedSignerNode.SetAttribute('SignerId', $SignerID)

                    [System.Void]$KMCI_Temp_AllowedSignersNode.AppendChild($NewKMCIAllowedSignerNode)

                    # Kernel-Mode signers don't need CI Signers

                }

                #Endregion Adding signer to the Signer Scenario and CiSigners

            }

            #Endregion Creating Signers

        }

    }

    End {

        # Save the modified XML back to the file

        $Xml.Save($XmlFilePath)

    }

}

Export-ModuleMember -Function 'New-PublisherLevelRules'

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