Password generator for the command line

[CarlD]

I'm a command-line kind of guy, and I write scripts primarily for myself.  Since many websites nowadays require strong passwords, I thought I'd write a simple password generator in AutoIt. I know that AutoIt mavens have written more elaborate pw generators; I offer mine for what it's worth. The compiled script, GenPass.exe, can be downloaded here. See below for Help text and source. Enjoy!

Updates:

2017-05-06: Default password changed to variable length of 13-22 characters; argument "1" no longer supported

                      When compiled as GenPW.exe, password is sent directly to the clipboard, no message box unless password generation fails.

2017-05-05: Correction to bypass password generation if argument is ?|H|h

2017-05-03: Added special argument 1 to generate a password of variable length (10-18 characters) including two (2) separator characters

2017-05-02: Added option /S to set a (persistent) randomization seed

Help:

GenPass.exe|GenPW.exe -- CLD rev. 2017-05-06
Generate a strong password and save it to the Windows clipboard

Note: GenPW.exe has the same functionality as GenPass.exe, but
      sends the generated password directly to the clipboard.
      No message box is displayed (unless password generation fails).
  
"Strong" means that the password contains random combinations of
alphnumeric characters, including at least one uppercase letter
(A-N,P-Z), one lowercase letter (a-k,m-z), and one number (0-9).
(Generated passwords do not use uppercase O or lowercase l as
these characters are easily confused with the numbers 0 and 1.)

The length of the password is up to you (see Usage, below),
but needless to say, the longer, the stronger.

By default, GenPass generates a strong password of between 13
and 22 characters that includes two of the following separator
characters: $%&()*+,-./:;@[]_. Alternatively, you can supply a
command-line argument in which any number n from 1 to 9 stands
for a random sequence of alphanumeric characters of length
n, and any other character stands for itself. Thus, you can
include fixed words and other characters, such as separators,
in the generated password. Spaces in the argument are converted
to underscores. Here are some examples:

Usage             Sample output
-----             -------------
GenPass           MqU26A*6dS-53r8
GenPass 9         frdhPYDs9
GenPass 58        weoXYHKxDI1uQ
GenPass 5.5       UfA6j.43VBB
GenPass 3-4-3     0I0-6gq4-njc
GenPass 5,3.7     I2FSR,tRZ.fjeIsFy
GenPass 3)5(3     UMf)m8513(CBq
GenPass 3[haha]3  yLa[haha]P3y
GenPass Yes way5  Yes_way1BsUh

Seed Option (/S)
----------------
Adding switch /S to the command-line argument causes GenPass to
set a seed for the random generation of password characters. A
bare /S sets a randomized seed which is written to disk in a file
named GenPass.rnd; this seed is used for all subsequent launches
of GenPass with the bare /S option. Alternatively, you can specify
a seed (range -2^31 to 2^31-1) on the command line with /S [seed].
Here are some examples:

GenPass /S
GenPass /S 33.3333
GenPass 5,5,5 /S
GenPass 5,5,5 /S 33.3333

Note that any subsequent launch of GenPass without the /S option
will cause GenPass.rnd to be deleted.

Source:

expandcollapse popup

#Region ;**** Directives created by AutoIt3Wrapper_GUI ****
#AutoIt3Wrapper_Outfile=GenPass.exe
#AutoIt3Wrapper_UseUpx=y
#EndRegion ;**** Directives created by AutoIt3Wrapper_GUI ****

#cs
GENPASS.AU3 -- AutoIt v3
CLD rev.2017-05-05
------------------
Generate a strong password and save it to the clipboard
>> Command GenPass ? for detailed help <<
-------------------------------------------------------
#ce

#include <Clipboard.au3>
#include <FileConstants.au3>
#include <MsgBoxConstants.au3>
#include <StringConstants.au3>
AutoItSetOption("WinTitleMatchMode", -4)
FileInstall ("d:\path\GenPass.htm", @ScriptDir & "\GenPass.htm", $FC_OVERWRITE)

; Template/Seed
Local $sTemp = ""
Local $bSeed = False, $fSeed=False
If $CmdLine[0] Then
    $sTemp = $CmdLineRaw
    If $CmdLine[$CmdLine[0]] = "/s" Then
        $bSeed = True
        $sTemp = StringTrimRight($sTemp, 2)
        $sTemp = StringStripWS($sTemp, $STR_STRIPTRAILING)
    EndIf
    If $CmdLine[$CmdLine[0] - 1] = "/s" Then
        $bSeed = True
        $fSeed = $CmdLine[$CmdLine[0]]
        $sTemp = StringTrimRight($sTemp, 3 + StringLen($fSeed))
        $sTemp = StringStripWS($sTemp, $STR_STRIPTRAILING)
    EndIf
EndIf
If Not $sTemp Then $sTemp = "8"
If $sTemp = "1" Then
    $aSeps = StringSplit("#$%&()*+,-./:;@[]_", "")
    $sTemp = String(Random(3,6,1)) & $aSeps[Random(1,$aSeps[0],1)] & _
        String(Random(2,4,1)) & $aSeps[Random(1,$aSeps[0],1)] & _
        String(Random(3,6,1))
EndIf
$sFn = @ScriptDir&"\GenPass.rnd"
If $bSeed Then
    If Not $fSeed Then
        If Not FileExists($sFn) Then
            $fSeed = Random(-1.999^31,1.999^31,0)
            $h=FileOpen($sFn,2)
            If $h > -1 Then
                FileWrite($h,$fSeed)
                FileClose($h)
            Else
                Exit MsgBox($MB_ICONWARNING, @ScriptName, "Error opening " & $sFn)
            EndIf
        Else
            $h=FileOpen($sFn)
            If $h > -1 Then
                $fSeed=FileRead($h)
                FileClose($h)
            Else
                Exit MsgBox($MB_ICONWARNING, @ScriptName, "Error opening " & $sFn)
            EndIf
        EndIf
    EndIf
    SRandom($fSeed)
Else
    If FileExists($sFn) Then FileDelete($sFn)
EndIf

; Show help
If StringInStr("?Hh", $sTemp) Then
    If WinExists("[REGEXPTITLE:GenPass.exe:.*]") Then
        WinActivate("[REGEXPTITLE:GenPass.exe:.*]")
    Else
        ShellExecute(@ScriptDir & "\GenPass.htm")
    EndIf
    Exit
EndIf

; Main
$sTemp = StringReplace($sTemp, " ", "_")
$iC = 1
While $iC < 10001
    $sPW = GenPW($sTemp)
    If $sPW Then
        ClipPut($sPW)
        If Not StringInStr (@ScriptName, "GenPW") Then _
            MsgBox($MB_ICONINFORMATION, @ScriptName, $sPW & _
            " saved to clipboard" & @CRLF & @CRLF & _
            @ScriptName & " ? shows detailed help")
        Exit
    Else
        $iC += 1
    EndIf
WEnd
Exit MsgBox($MB_ICONWARNING, @ScriptName, "Password generation failed!")
;-------------------------------

Func GenPw($sTemplate)
    Local $aIn = StringSplit($sTemplate,"")
    Local $sOut = ""
    Local $sABC = _
"0123456789ABCDEFGHIJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz0123456789"
    Local $aAB = StringSplit($sABC, "")
    Local $bUC = 0, $bLC = 0, $bNR = 0
    For $i = 1 To $aIn[0]
        If Int($aIn[$i]) Then
            $iK = $aIn[$i]
            For $j = 1 To $iK
                $iR = Random(1, $aAB[0],1)
                Select
                    Case StringInStr("0123456789", $aAB[$iR])
                        $bNR = 1
                    Case StringInStr("ABCDEFGHIJKLMNPQRSTUVWXYZ", _
                            $aAB[$iR], $STR_CASESENSE)
                        $bUC = 1
                    Case StringInStr("abcdefghijklmnpqrstuvwxyz", _
                            $aAB[$iR], $STR_CASESENSE)
                        $bLC = 1
                EndSelect
                $sOut &= $aAB[$iR]
            Next
        Else
            $sOut &= $aIn[$i]
        EndIf
    Next
    If ($bUC And $bLC And $bNR) Then
        Return $sOut
    Else
        Return 0
    EndIf
EndFunc

 

Edited May 6, 2017 by CarlD
Update

[spudw2k]

Looks pretty neat.  My only criticism is that the password is randomized each time.  It would be nice if there was a "seed" mode that could consistently generate the same password like a hashing function.  I could see both methods being useful (consistent output and random) depending on the use case.  

Without downloading and running the exec, can you share the contents of the GenPass.html file?

[TheDcoder]

If you need a very good password management system, you should try KeePass. It contains everything you expect... if you need something extra, you can always look for plugins

[CarlD]

3 hours ago, spudw2k said:

Without downloading and running the exec, can you share the contents of the GenPass.html file?

Sure, it's the Help text included in my OP.

The idea of a "seed" option is an interesting one. Will look into it. Thanks for your comments.

[CarlD]

Added a seed option (/S), in response to @spudw2k.  Details are in the updated Help text, in the OP.  

Edited May 5, 2017 by CarlD

[CarlD]

9 hours ago, TheDcoder said:

If you need a very good password management system, you should try KeePass. It contains everything you expect... if you need something extra, you can always look for plugins

Thanks for the tip. I've resisted password managers due to cultural/age reasons. As far as I'm concerned, the natural order of things is a monospace green screen font on a black background, and there is (or should be) no such thing as a password. In other words, my excuse is that I'm old. 

[TheDcoder]

2 hours ago, CarlD said:

In other words, my excuse is that I'm old. 

That's a good one

[CarlD]

Update: Special argument 1 generates a strong password of variable length (10-18 characters) that includes two separator characters #$%&()*+,-./:;@[]_ . See the updated Help text in the OP.

 

Edited May 4, 2017 by CarlD

[CarlD]

Update: Default password is now variable length 13-22 characters. Also,  when compiled as GenPW.exe, password is sent directly to the clipboard, no message box unless password generation fails.

Edited May 7, 2017 by CarlD

[Trong]

Please, let's create a program like this:

GUI Script:

Global $nMsg, $hGUI = GUICreate("Password Generator", 456, 243, 192, 124)
GUICtrlCreateLabel("Password Include:", 5, 5, 440, 17, 0x0200, 0x00100000)
Global $sLowercase = GUICtrlCreateCheckbox("abcdefghijkmnopqrstuvwxyz", 8, 24, 209, 17, 0x0C00)
Global $sUppercase = GUICtrlCreateCheckbox("ABCDEFGHIJKLMNPQRSTUVWXYZ", 8, 48, 217, 17, 0x0C00)
Global $sNumber = GUICtrlCreateCheckbox("0123456789", 8, 72, 97, 17, 0x0C00)
Global $sSymboy = GUICtrlCreateCheckbox("~!@#$%^*()_+", 8, 96, 97, 17, 0x0C00)
Global $sOther = GUICtrlCreateCheckbox("Custom Char:", 8, 120, 92, 17, 0x0C00)
Global $pOther = GUICtrlCreateInput("", 112, 120, 137, 21)
GUICtrlCreateLabel("Password Leng:", 16, 152, 92, 17, 0x0200, 0x00100000)
Global $pLenFrom = GUICtrlCreateInput("8", 112, 152, 49, 21)
GUICtrlCreateLabel("to", 176, 152, 21, 17, 0x0200, 0x00100000)
Global $pLenTo = GUICtrlCreateInput("8", 200, 152, 49, 21)
GUICtrlCreateLabel("Password file:", 16, 184, 92, 17, 0x0200, 0x00100000)
Global $pSaveFile = GUICtrlCreateInput(@ScriptDir & "\PasswordLib.txt", 112, 184, 257, 21)
Global $iStatus = GUICtrlCreateLabel("TIP: Select your option and select path file to save your password!", 8, 216, 428, 17, 0x0200, 0x00100000)
Global $bGenerator = GUICtrlCreateButton("Generator All && Save", 256, 32, 193, 145)
Global $bSelectPath = GUICtrlCreateButton("...", 376, 184, 59, 25)
GUISetState(@SW_SHOW)
While 1
    $nMsg = GUIGetMsg()
    Switch $nMsg
        Case -3
            Exit
    EndSwitch
WEnd

[CarlD]

7 hours ago, Trong said:

Please, let's create a program like this:

I've never done GUI scripting, so there would be a learning curve for me. If you'd like to use/improve my code above, feel free. And, of course, there are other GUI options, for example: