parts/GenerateRandomPassword.ps1
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<#
.SYNOPSIS Generate a random password. .NOTES Original: https://gist.github.com/indented-automation/2093bd088d59b362ec2a5b81a14ba84e #> param ( [parameter(ValueFromPipeline)] [ValidateRange(8, 255)] [int] $Length = 8, [string[]] $CharacterSet = ('abcdefghjkmnpqrstuvwxyz','ABCDEFGHJKMNPQRSTUVWXYZ','23456789','!$%&.#;'), [int[]] $CharacterSetCount = (@(1) * $CharacterSet.Count) ) begin { $bytes = [Byte[]]::new(4) $randomGenerator = [System.Security.Cryptography.RandomNumberGenerator]::Create() $randomGenerator.GetBytes($bytes) $seed = [System.BitConverter]::ToInt32($bytes, 0) $random = [Random]::new($seed) $allCharacterSets = [String]::Concat($CharacterSet) } process { $requiredCharLength = 0 foreach ($i in $CharacterSetCount) { $requiredCharLength += $i } if ($requiredCharLength -gt $Length) { throw "The sum of characters specified by CharacterSetCount is higher than the desired password length" } $password = [Char[]]::new($Length) $index = 0 for ($i = 0; $i -lt $CharacterSet.Count; $i++) { for ($j = 0; $j -lt $CharacterSetCount[$i]; $j++) { $password[$index++] = $CharacterSet[$i][$random.Next($CharacterSet[$i].Length)] } } for ($i = $index; $i -lt $Length; $i++) { $password[$index++] = $allCharacterSets[$random.Next($allCharacterSets.Length)] } # Fisher-Yates shuffle for ($i = $Length; $i -gt 0; $i--) { $n = $i - 1 $m = $random.Next($i) $j = $password[$m] $password[$m] = $password[$n] $password[$n] = $j } [string]::new($password) } |