internal/functions/Get-ADIdentifierType.ps1
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function Get-ADIdentifierType { <# .SYNOPSIS Returns the type of the identifier string offered. .DESCRIPTION Returns the type of the identifier string offered. Can differentiate between distinguished names, objectGuid or SID. Will not perform any network calls to validate results. .PARAMETER Name The name to resolve .EXAMPLE PS C:\> Get-ADIdentifierType -Name '92469e61-8005-4c6d-b17c-478118f66c20' Validates that the specified string is a GUID. #> [OutputType([string])] [CmdletBinding()] param ( [Parameter(Mandatory = $true)] [string] $Name ) if ($Name -match '^(\{{0,1}([0-9a-fA-F]){8}-([0-9a-fA-F]){4}-([0-9a-fA-F]){4}-([0-9a-fA-F]){4}-([0-9a-fA-F]){12}\}{0,1})$') { return 'Guid' } if ($Name -like "*=*") { return 'DN' } if ($Name -match '^S-1-5-21-\d{7}-\d{9}-\d{9}-\d+$') { return 'SID' } return "Unknown" } |