IsUserValid_1.ps1

# -- Get the full script here : https://github.com/VimalShekar/PowerShell/blob/master/CheckIsUserValid.ps1

# This is used by some of the functions below
$logonUserSignature =
@'
[DllImport( "advapi32.dll" )]
public static extern bool LogonUser( String lpszUserName,
                                     String lpszDomain,
                                     String lpszPassword,
                                     int dwLogonType,
                                     int dwLogonProvider,
                                     ref IntPtr phToken );
'@



$closeHandleSignature =
@'
[DllImport( "kernel32.dll", CharSet = CharSet.Auto )]
public static extern bool CloseHandle( IntPtr handle );
'@

$revertToSelfSignature = 
@'
[DllImport("advapi32.dll", SetLastError = true)]
public static extern bool RevertToSelf();
'@

$AdvApi32 = Add-Type -MemberDefinition $logonUserSignature -Name "AdvApi32" -Namespace "PsInvoke.NativeMethods" -PassThru
$Kernel32 = Add-Type -MemberDefinition $closeHandleSignature -Name "Kernel32" -Namespace "PsInvoke.NativeMethods" -PassThru
$AdvApi32_2  = Add-Type -MemberDefinition $revertToSelfSignature -Name "AdvApi32_2" -Namespace "PsInvoke.NativeMethods" -PassThru
[Reflection.Assembly]::LoadWithPartialName("System.Security")



function IsLocalUserNamePasswordValid()
{
    param(
    [String]$UserName,
    [String]$Password
	  )
	
  	$Logon32ProviderDefault = 0
	$Logon32LogonInteractive = 2
	$tokenHandle = [IntPtr]::Zero       
	$success = $false    
	$DomainName = $null

	#Attempt a logon using this credential
	$success = $AdvApi32::LogonUser($UserName, $DomainName, $Password, $Logon32LogonInteractive, $Logon32ProviderDefault, [Ref] $tokenHandle)            
  	return $success
}

function IsDomainUserNamePasswordValid()
{
    param(
    [String]$UserName,
	  [String]$Password,
	  [String]$DomainName
	  )
	
  	$Logon32ProviderDefault = 0
	$Logon32LogonInteractive = 2
	$tokenHandle = [IntPtr]::Zero       
	$success = $false    	

	#Attempt a logon using this credential
	$success = $AdvApi32::LogonUser($UserName, $DomainName, $Password, $Logon32LogonInteractive, $Logon32ProviderDefault, [Ref] $tokenHandle)            
  	return $success
}


#Example Usage:
#IsLocalUserNamePasswordValid -UserName TestLocalUser1 -Password Test@Pass1
#IsDomainUserNamePasswordValid -UserName TestDomUser1 -Password Test@Pass1 -DomainName testdom.local