PowerShell script to generate a random password of specified length and complexity.

generate-password.ps1

#Stupid test script to generate a random, possibly complex password.
param
(
	[Parameter(Mandatory=$true)]
		[int]$Length,
	[Parameter(Mandatory=$false)]
		[switch]$Complexity
)

function MakePassword
{
	param
	(
		$IsComplex,
		$Length
	)
	
	#Define the array of possible options.
	#Note that index 61 is the cut-off for non-complex passwords!
	$characterArray = @("a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", `
		"l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", `
		"z", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", `
		"N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "1", `
		"2", "3", "4", "5", "6", "7", "8", "9", "0", "~", "!", "@", "#", "$", `
		"%", "^", "&", "*", "(", ")", "-", "_", "+", "=", "[", "]", "{", "}", `
		"|", "\", ":", ";", "<", ",", ">", ".", "?", "/")
	
	#Create an array to house the final password value.
	$passwordValue = ""
	$counter = 0
	if($IsComplex) {
		$ceiling = $characterArray.Length
	} else {
		$ceiling = 61
	}
	
	#Loop through and pick a character.
	for($i = 0; $i -lt $Length; $i++)
	{
		#Make a random number.
		$index = Get-Random -Minimum 0 -Maximum $ceiling
		$currentValue = $characterArray[$index]
		
		#Put that into the array.
		$passwordValue += $currentValue
	}
	
	#Write the password to the screen.
	Write-Output $passwordValue -
}

#Call the function.
MakePassword -IsComplex $Complexity -Length $Length