(PureBasic) TOTP Authenticator: Duplicate Results of Online Tools

Duplicates the online tool for the Google 2FA Authenticator online tools at

For more information, see https://rootprojects.org/authenticator/

Chilkat PureBasic Module Download

Chilkat PureBasic Module

IncludeFile "CkCrypt2.pb"

Procedure ChilkatExample()

    ; This example requires the Chilkat API to have been previously unlocked.
    ; See Global Unlock Sample for sample code.
    ; 
    ; Note: This example was written on 7-March-2020.  If the online tools have since changed, the instructions provided here may no longer be valid.
    ; 

    crypt.i = CkCrypt2::ckCreate()
    If crypt.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ; ---------------------------------------------------------------------------------------------
    ; To duplicate the results of the Authenticator Test at https://rootprojects.org/authenticator/
    ; do the following:
    ; 1) At the bottom of the screen you will see a URI such as:
    ; 
    ;    otpauth://totp/ACME%20Co:john@example.com?secret=HXDMVJECJJWSRB3HWIZR4IFUGFTMXBOZ&issuer=ACME%20Co&algorithm=SHA1&digits=6&period=30
    ; 
    ;    Use the uppercase secret.  For example:
    secretKey.s = "HXDMVJECJJWSRB3HWIZR4IFUGFTMXBOZ"

    ; 2) DO NOT cick the "Regenerate" button.  The regenerate button will generate a new secret.
    ; 
    ; 3) Run the following code to generate your 6-digit token.  Compare with the token shown in the picture of the iPhone at https://rootprojects.org/authenticator/
    ;      Note: A new token is generated every 30 seconds.  You must generate within the same 30 second interval to get the same result.
    Debug "Your token is: " + CkCrypt2::ckTotp(crypt,secretKey,"base32","0","",30,6,-1,"sha1")

    ; ---------------------------------------------------------------------------------------------
    ; To duplicate the results of the Google2FA Playground at https://pragmarx.com/playground/google2fa#/
    ; do the following:

    ; 1) Copy the 64-byte secret key:
    secretKey = "OR2VQTRVHB2HO2LCGVWXQSCDK5ZHQS2D3THQ6UXO57XIE7ZHOWS6HDPQ622GU747"

    ; 2) Run the same code:
    ;    (Note: The online tool generates a new result every 30 seconds.  You must generate and compare within the same 30-second interval.)
    Debug "Your token is: " + CkCrypt2::ckTotp(crypt,secretKey,"base32","0","",30,6,-1,"sha1")


    CkCrypt2::ckDispose(crypt)


    ProcedureReturn
EndProcedure