Functions/Convert-ROT13.ps1
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Function Convert-ROT13 { <# .SYNOPSIS Shifts letters in string by 13 positions. .DESCRIPTION Shifts letters in string by 13 positions. 'A' becomes 'N' and so on. .PARAMETER String A simple string or array of strings that you want Convert-ROT13 run against. .NOTES Link: https://en.wikipedia.org/wiki/ROT13 .EXAMPLE Convert-ROT13 -String 'Hello World!' Would return Uryyb Jbeyq! .EXAMPLE Convert-ROT13 -String 'Uryyb Jbeyq!' Would return Hello World! .EXAMPLE Convert-ROT13 -String 'This is a secret' Would return Guvf vf n frperg .EXAMPLE Convert-ROT13 -String 'one', 'two' -verbose Would return VERBOSE: String is [one|two] VERBOSE: Current line is [one] bar VERBOSE: Current line is [two] gjb .INPUTS [string[]] .OUTPUTS [string[]] .LINK https://en.wikipedia.org/wiki/ROT13 #> #region Parameter [CmdletBinding(ConfirmImpact='None')] Param( [Parameter(Position = 0, HelpMessage='Please enter text to obfuscate', Mandatory, ValueFromPipeLine)] [Alias('Text')] [String[]] $String ) #endregion Parameter begin { $Alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz' $Cipher = 'NOPQRSTUVWXYZABCDEFGHIJKLMnopqrstuvwxyzabcdefghijklm' Write-Verbose -Message "Starting $($MyInvocation.MyCommand)" } process { Write-Verbose -Message "String is [$((($String | findstr.exe /r ".") -split "`n") -join '|')]" Foreach ($Line in $String) { Write-Verbose -Message "Current line is [$($Line)]" [string] $NewString = '' foreach ($Char in $Line.ToCharArray()) { if ( $Char -cmatch '[A-Za-z]' ) { $NewString += $Cipher.Chars($Alphabet.IndexOf($Char)) } else { $NewString += $Char } } Write-Output -InputObject $NewString } } end { Write-Verbose -Message "Ending $($MyInvocation.MyCommand)" } } # endfunction Convert-ROT13 |