(PowerBuilder) Google Authenticator Algorithm

Example code implementing the Google Authenticator algorithm.

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

integer li_rc
string ls_SecretBase32
oleobject loo_Crypt
string ls_Otp

// 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.

ls_SecretBase32 = "JBSWY3DPEHPK3PXP"

// Do the following to calculate the 6-digit decimal Google authenticator token for a base32 secret,
// given the current system date/time.
loo_Crypt = create oleobject
// Use "Chilkat_9_5_0.Crypt2" for versions of Chilkat < 10.0.0
li_rc = loo_Crypt.ConnectToNewObject("Chilkat.Crypt2")
if li_rc < 0 then
    destroy loo_Crypt
    MessageBox("Error","Connecting to COM object failed")
    return
end if
ls_Otp = loo_Crypt.Totp(ls_SecretBase32,"base32","0","",30,6,-1,"sha1")

Write-Debug "6-digit decimal token = " + ls_Otp


destroy loo_Crypt