PowerShell User Authentication Function Example Code

　　 I encountered user verification in my recent work, which requires verifying whether a user is legitimate based on username and password. I found this code on a foreign website and am sharing it with everyone here. If you also need user verification, you can directly copy and use it. If there is no place to use it now, you can also save it for future reference.

Function Test-UserCredential {
   [CmdletBinding()] [OutputType([System.Boolean])]
   param(
     [Parameter(Mandatory=$true)] [ValidateNotNullOrEmpty()]
     [System.String] $Username,
     [Parameter(Mandatory=$true)] [ValidateNotNullOrEmpty()]
     [System.String] $Password,
     [Parameter()]
     [Switch] $Domain
   )
   Begin {
     $assembly = [system.reflection.assembly]::LoadWithPartialName('System.DirectoryServices.AccountManagement')
   }
   Process {
     try {
       $system = Get-WmiObject -Class Win32_ComputerSystem
       if ($Domain) {
         if (0, 2 -contains $system.DomainRole) {
           throw 'This computer is not a member of a domain.'
         }
           $principalContext = New-Object -TypeName System.DirectoryServices.AccountManagement.PrincipalContext 'Domain', $system.Domain
         }
       }
         $principalContext = New-Object -TypeName System.DirectoryServices.AccountManagement.PrincipalContext 'Machine', $env:COMPUTERNAME
       }
       return $principalContext.ValidateCredentials($Username, $Password)
     }
     catch {
       throw 'Failed to test user credentials. The error was: "{0}".' -f $_
     }
   }
}

It is very simple and convenient to use: Test-UserCredential "Username" "Password" "User Domain", the third parameter "User Domain" is an optional parameter, and the return type is boolean.

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