Rust

Google Authenticator Algorithm

See more Encryption Examples

Example code implementing the Google Authenticator algorithm. Rust

// 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.

let secret_base32 = "JBSWY3DPEHPK3PXP".to_string();

// Do the following to calculate the 6-digit decimal Google authenticator token for a base32 secret,
// given the current system date/time.
let crypt = chilkat::Crypt2::new();
let otp = crypt.totp(&secret_base32, "base32", "0", "", 30, 6, -1, "sha1").unwrap_or_default();

println!("6-digit decimal token = {}", otp);