Visual FoxPro

TOTP Authenticator: Duplicate Results of Online Tools

See more Encryption Examples

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

• https://rootprojects.org/authenticator/
• https://pragmarx.com/playground/google2fa#/

Visual FoxPro

LOCAL loCrypt
LOCAL lcSecretKey

* 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.
* 

loCrypt = CreateObject('Chilkat.Crypt2')

* ---------------------------------------------------------------------------------------------
* 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:
lcSecretKey = "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.
? "Your token is: " + loCrypt.Totp(lcSecretKey,"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:
lcSecretKey = "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.)
? "Your token is: " + loCrypt.Totp(lcSecretKey,"base32","0","",30,6,-1,"sha1")

RELEASE loCrypt