(PowerShell) Google Authenticator Algorithm
Example code implementing the Google Authenticator algorithm.
Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"
# 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.
$secretBase32 = "JBSWY3DPEHPK3PXP"
# Do the following to calculate the 6-digit decimal Google authenticator token for a base32 secret,
# given the current system date/time.
$crypt = New-Object Chilkat.Crypt2
$otp = $crypt.Totp($secretBase32,"base32","0","",30,6,-1,"sha1")
$("6-digit decimal token = " + $otp)
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