Question

I am trying to get password from user.

If he simply enter nothing [just press the enter key alone], then warning should be thrown.

$NewUserPassword = Read-Host -assecurestring "Please enter New Run time user password"

$NewUserPassword=$NewUserPassword.Trim()
If ( ($NewUserPassword -eq $null) -or ($NewUserPassword -eq "") ){

    Write-Warning "Please enter valid password. Script execution is stopped"
    Exit
}

But script throws error as follows

Method invocation failed because [System.Security.SecureString]
doesn’t contain a method named ‘Trim’.

But if i remove trim() method ,the application still doesn’t throw warning.

What could be the reason? How to get valid password?

Answer 1

You cannot inspect the value of a SecureString instance directly and comparing with a String instance is futile anyway. However, it has a Length property which you can use for checking whether it is empty:

$NewUserPassword = Read-Host -assecurestring "Please enter New Run time user password"
If ($NewUserPassword.Length -eq 0){
    Write-Warning "Please enter valid password. Script execution is stopped"
    Exit
}