Public/Get-RandomString.ps1
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<# # Example creates something like # VrmpwjSjKEADWe+rv4CF+KrZ Get-RandomString -length 24 Get-RandomString -length 10 RMUyX+s40r Get-RandomString -length 32 -ExcludeSpecialChars -ExcludeNumbers -ExcludeLowerCase EQUETZHJSZFEDSXDPYXHENURRVJSYZXS Get-RandomString -length 32 -ExcludeSpecialChars -ExcludeNumbers -ExcludeLowerCase -ExcludeUpperCase -AllowedCharacters @("a","b","c","*") ccbcbb*c*acabcccbbccacbc*a***baa #> Function Get-RandomString() { <# .SYNOPSIS Create a random string with a defined length. You can include/exclude different character sets and characters. .DESCRIPTION Apteco PS Modules - Create a random string The random string will automatically be created with a mixture of numbers "0", "1", "2", "3", "4", "5", "6", "8", "9" lowercase "a", "b", "c", "d", "e", "f", "g", "h", "j", "k", "m", "n", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z" uppercase "A", "B", "C", "D", "E", "F", "G", "H", "J", "K", "M", "N", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z" and special characters "*", "#", "=", "-", "+", "|", "~" You can exclude the different sets individually like with -ExcludeSpecialChars With the parameter -AllowedCharacters you can define an array with only valid characters, so only they will be used to create the random string. .PARAMETER Length Amount of characters you want to get as final string .PARAMETER AllowedCharacters Additionally allowed characters - if you want to only have those characters, do it like Get-RandomString -length 32 -ExcludeSpecialChars -ExcludeNumbers -ExcludeLowerCase -ExcludeUpperCase -AllowedCharacters @("a","b","c","*") .PARAMETER ExcludeNumbers Exclude numbers from the final string .PARAMETER ExcludeLowerCase Exclude lower characters from the final string .PARAMETER ExcludeUpperCase Exclude UPPER characters from the final string .PARAMETER ExcludeSpecialChars Exclude special characters from the final string .EXAMPLE Get-RandomString -length 24 .EXAMPLE Get-RandomString -length 32 -ExcludeSpecialChars -ExcludeNumbers -ExcludeLowerCase .EXAMPLE Get-RandomString -length 32 -AllowedCharacters @("a","b","c","*") .EXAMPLE Get-RandomString -length 32 -ExcludeSpecialChars -ExcludeNumbers -ExcludeLowerCase -ExcludeUpperCase -AllowedCharacters @("a","b","c","*") .EXAMPLE 10,20 | Get-RandomString .EXAMPLE 1..10 | Get-RandomString .EXAMPLE 1..10 | % { Get-RandomString -length 20 } .INPUTS int .OUTPUTS String .NOTES Author: florian.von.bracht@apteco.de #> [cmdletbinding()] param( [Parameter(Mandatory=$true,ValueFromPipeline=$true)][int]$Length ,[Parameter(Mandatory=$false)][String[]]$AllowedCharacters = [String]@() ,[Parameter(Mandatory=$false)][Switch]$ExcludeNumbers = $false ,[Parameter(Mandatory=$false)][Switch]$ExcludeLowerCase = $false ,[Parameter(Mandatory=$false)][Switch]$ExcludeUpperCase = $false ,[Parameter(Mandatory=$false)][Switch]$ExcludeSpecialChars = $false ) begin { # Add characters to use $chars = [Array]@() $chars += $AllowedCharacters If ( $ExcludeNumbers -eq $false ) { $chars += @("0", "1", "2", "3", "4", "5", "6", "8", "9") } If ( $ExcludeLowerCase -eq $false ) { $chars += @("a", "b", "c", "d", "e", "f", "g", "h", "j", "k", "m", "n", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z") } If ( $ExcludeUpperCase -eq $false ) { $chars += @("A", "B", "C", "D", "E", "F", "G", "H", "J", "K", "M", "N", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z") } If ( $ExcludeSpecialChars -eq $false ) { $chars += @("*", "#","=","-","+","|","~") } If ( $chars.Count -eq 0 ) { Write-Warning -Message "No characters left for Generation of RandomString" } # Create a new random variable #$random = [Random]::new() # this is now declared in the module } process { # Put the string together $stringBuilder = [System.Text.StringBuilder]::new($Length) for ($i = 0; $i -lt $Length; $i++) { [void]$stringBuilder.Append( $chars[$Script:rnd.Next($chars.Length)] ) } #return return $stringBuilder.ToString() } } |