GPOZaurr/Public/Get-GPOZaurrPermission.ps1

function Get-GPOZaurrPermission {
    [cmdletBinding(DefaultParameterSetName = 'GPO' )]
    param(
        [Parameter(ParameterSetName = 'GPOName')]
        [string] $GPOName,

        [Parameter(ParameterSetName = 'GPOGUID')]
        [alias('GUID', 'GPOID')][string] $GPOGuid,

        [string[]] $Principal,
        [validateset('DistinguishedName', 'Name', 'Sid')][string] $PrincipalType = 'Sid',

        [validateSet('Unknown', 'NotWellKnown', 'NotWellKnownAdministrative', 'NotAdministrative', 'Administrative', 'All')][string[]] $Type = 'All',

        [switch] $SkipWellKnown,
        [switch] $SkipAdministrative,
        [switch] $ResolveAccounts,

        [switch] $IncludeOwner,
        [Microsoft.GroupPolicy.GPPermissionType[]] $IncludePermissionType,
        [Microsoft.GroupPolicy.GPPermissionType[]] $ExcludePermissionType,
        [switch] $IncludeGPOObject,

        [alias('ForestName')][string] $Forest,
        [string[]] $ExcludeDomains,
        [alias('Domain', 'Domains')][string[]] $IncludeDomains,
        [System.Collections.IDictionary] $ExtendedForestInformation
    )
    Begin {
        $ForestInformation = Get-WinADForestDetails -Forest $Forest -IncludeDomains $IncludeDomains -ExcludeDomains $ExcludeDomains -ExtendedForestInformation $ExtendedForestInformation
        $ADAdministrativeGroups = Get-ADADministrativeGroups -Type DomainAdmins, EnterpriseAdmins -Forest $Forest -IncludeDomains $IncludeDomains -ExcludeDomains $ExcludeDomains -ExtendedForestInformation $ExtendedForestInformation
        if ($Type -eq 'Unknown') {
            if ($SkipAdministrative -or $SkipWellKnown) {
                Write-Warning "Get-GPOZaurrPermission - Using SkipAdministrative or SkipWellKnown while looking for Unknown doesn't make sense as only Unknown will be displayed."
            }
        }
        if ($ResolveAccounts) {
            $Accounts = @{ }
            foreach ($Domain in $ForestInformation.Domains) {
                $QueryServer = $ForestInformation['QueryServers'][$Domain]['HostName'][0]
                $DomainInformation = Get-ADDomain -Server $QueryServer
                $Users = Get-ADUser -Filter * -Server $QueryServer -Properties PasswordLastSet, LastLogonDate, UserPrincipalName
                foreach ($User in $Users) {
                    $U = -join ($DomainInformation.NetBIOSName, '\', $User.SamAccountName)
                    $Accounts[$U] = $User
                }
                $Groups = Get-ADGroup -Filter * -Server $QueryServer
                foreach ($Group in $Groups) {
                    $G = -join ($DomainInformation.NetBIOSName, '\', $Group.SamAccountName)
                    $Accounts[$G] = $Group
                }
            }
        }
    }
    Process {
        foreach ($Domain in $ForestInformation.Domains) {
            $QueryServer = $ForestInformation['QueryServers'][$Domain]['HostName'][0]
            if ($GPOName) {
                $getGPOSplat = @{
                    Name        = $GPOName
                    Domain      = $Domain
                    Server      = $QueryServer
                    ErrorAction = 'SilentlyContinue'
                }
            } elseif ($GPOGuid) {
                $getGPOSplat = @{
                    Guid        = $GPOGuid
                    Domain      = $Domain
                    Server      = $QueryServer
                    ErrorAction = 'SilentlyContinue'
                }
            } else {
                $getGPOSplat = @{
                    All         = $true
                    Domain      = $Domain
                    Server      = $QueryServer
                    ErrorAction = 'SilentlyContinue'
                }
            }
            Get-GPO @getGPOSplat | ForEach-Object -Process {
                $getPrivPermissionSplat = @{
                    Principal              = $Principal
                    PrincipalType          = $PrincipalType
                    Accounts               = $Accounts
                    Type                   = $Type
                    GPO                    = $_
                    SkipWellKnown          = $SkipWellKnown.IsPresent
                    SkipAdministrative     = $SkipAdministrative.IsPresent
                    IncludeOwner           = $IncludeOwner.IsPresent
                    IncludeGPOObject       = $IncludeGPOObject.IsPresent
                    IncludePermissionType  = $IncludePermissionType
                    ExcludePermissionType  = $ExcludePermissionType
                    ADAdministrativeGroups = $ADAdministrativeGroups
                }
                Get-PrivPermission @getPrivPermissionSplat
            }
        }
    }
    End {

    }
}