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-rw-r--r--examples/otp.rs43
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+// Copyright (C) 2020 Robin Krahl <robin.krahl@ireas.org>
+// SPDX-License-Identifier: CC-0
+
+//! Connects to a Nitrokey device, configures an TOTP slot and generates a one-time password from
+//! it.
+
+use std::time;
+
+use nitrokey::{Authenticate, ConfigureOtp, Device, GenerateOtp};
+
+fn main() -> Result<(), nitrokey::Error> {
+ let mut manager = nitrokey::take()?;
+ let device = manager.connect()?;
+
+ // Configure the OTP slot (requires admin PIN)
+ let data = nitrokey::OtpSlotData::new(
+ 1,
+ "test",
+ "3132333435363738393031323334353637383930",
+ nitrokey::OtpMode::SixDigits,
+ );
+ let mut admin = device.authenticate_admin("12345678")?;
+ admin.write_totp_slot(data, 30)?;
+ let mut device = admin.device();
+
+ // Set the time for the OTP generation
+ let time = time::SystemTime::now()
+ .duration_since(time::UNIX_EPOCH)
+ .expect("Invalid system time");
+ device.set_time(time.as_secs(), true)?;
+
+ // Generate a one-time password -- depending on the configuration, we have to set the user PIN
+ let config = device.get_config()?;
+ let otp = if config.user_password {
+ let user = device.authenticate_user("123456")?;
+ user.get_totp_code(1)
+ } else {
+ device.get_totp_code(1)
+ }?;
+ println!("Generated OTP code: {}", otp);
+
+ Ok(())
+}