(AutoIt) Google Authenticator Algorithm

Example code implementing the Google Authenticator algorithm.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

; This example assumes the Chilkat API to have been previously unlocked.
; See Global Unlock Sample for sample code.

; Generating TOTP Base32 Secret: 
; When you enable 2FA with a TOTP-based authenticator app, Google will provide you with a QR code
; that you can scan using the app. This QR code contains a TOTP base32 secret.
; You can also choose to view and copy the secret manually.

Local $secretBase32 = "JBSWY3DPEHPK3PXP"

; Do the following to calculate the 6-digit decimal Google authenticator token for a base32 secret,
; given the current system date/time.
$oCrypt = ObjCreate("Chilkat.Crypt2")
Local $sOtp = $oCrypt.Totp($secretBase32,"base32","0","",30,6,-1,"sha1")

ConsoleWrite("6-digit decimal token = " & $sOtp & @CRLF)