PowerShell Password Generator

New-Password.ps1

<#
    .Synopsis
    Generate one or more random passwords, from 7 to 64 characters in length.

    .Description
    Passwords are generated using an equal distribution of upper and lower case letters, numbers, space, and special
    characters found on the number row.
    
    .Parameter Length
    Specifies the length of the generated password(s).
    - Default: 16
    - Minimum: 7
    - Maximum 64
    
    .Parameter Count
    Specifies how many passwords to generate.
    - Default: 1
    - Miniumum: 1
    - Maximum: Int32 max value
#>
param(
    [ValidateRange(7, 64)]
    [int]$Length = 16,
    [ValidateRange(1, [int32]::MaxValue)]
    [int]$Count = 1
)
foreach ($pw in (1..$Count)) {

    $Lowercase = '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'
    $Uppercase = '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'
    $Numbers = '1', '2', '3', '4', '5', '6', '7', '8', '9', '0'
    $SpecialCharacters = ' ', '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '-', '_', '=', '+'
    $PasswordArray = @()

    $TempLength = $Length
    while ($TempLength % 4 -ne 0) { $TempLength++ }

    do { $PasswordArray += Get-Random $Uppercase }
    until ($PasswordArray.count -eq $TempLength / 4)

    do { $PasswordArray += Get-Random $Lowercase }
    until ($PasswordArray.count -eq ($TempLength / 4) * 2)

    do { $PasswordArray += Get-Random $Numbers }
    until ($PasswordArray.count -eq ($TempLength / 4) * 3)

    do { $PasswordArray += Get-Random $SpecialCharacters }
    until ($PasswordArray.count -eq ($TempLength / 4) * 4)

    $Password = (Get-Random $PasswordArray -Count $Length) -join ''
    Write-Output -InputObject "$($Password)"
}