Functions/Test-Identity.ps1
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# Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. function Test-Identity { <# .SYNOPSIS Tests that a name is a valid Windows local or domain user/group. .DESCRIPTION Uses the Windows `LookupAccountName` function to find an identity. If it can't be found, returns `$false`. Otherwise, it returns `$true`. Use the `PassThru` switch to return a `Carbon.Identity` object (instead of `$true` if the identity exists. .LINK Resolve-Identity .LINK Resolve-IdentityName .EXAMPLE Test-Identity -Name 'Administrators Tests that a user or group called `Administrators` exists on the local computer. .EXAMPLE Test-Identity -Name 'CARBON\Testers' Tests that a group called `Testers` exists in the `CARBON` domain. .EXAMPLE Test-Identity -Name 'Tester' -PassThru Tests that a user or group named `Tester` exists and returns a `System.Security.Principal.SecurityIdentifier` object if it does. #> [CmdletBinding()] param( [Parameter(Mandatory=$true)] [string] # The name of the identity to test. $Name, [Switch] # Returns a `Carbon.Identity` object if the identity exists. $PassThru ) Set-StrictMode -Version 'Latest' Use-CallerPreference -Cmdlet $PSCmdlet -Session $ExecutionContext.SessionState $identity = [Carbon.Identity]::FindByName( $Name ) if( -not $identity ) { return $false } if( $PassThru ) { return $identity } return $true } |