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(Classic ASP) Google Authenticator AlgorithmExample code implementing the Google Authenticator algorithm.
<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> </head> <body> <% ' 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. ' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Crypt2") set crypt = Server.CreateObject("Chilkat.Crypt2") otp = crypt.Totp(secretBase32,"base32","0","",30,6,-1,"sha1") Response.Write "<pre>" & Server.HTMLEncode( "6-digit decimal token = " & otp) & "</pre>" %> </body> </html> |
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