Struct Otp

pub struct Otp<G: ToBytes> { /* private fields */ }

One-time passcodes.

See Hotp and Totp.

Implementations

impl Otp<Counter>

pub fn new(key: String, initial_count: u64, length: u32) -> Self

Get a HOTP generator with the given key, initial count, and which generates passcodes of length.

impl Otp<Time>

pub fn new(key: String, t0: Instant, window: u64, length: u32) -> Self

Get a TOTP generator.

Repeated calls to Self::get will return the same passcode when in the same window.

pub fn new_with_now( key: String, t0: Instant, step: u64, digits: u32, now: Box<dyn Fn() -> Instant>, ) -> Self

Get a TOTP generator with a custom function to provide the “now” value.

See Self::new.

impl<G: ToBytes> Otp<G>

pub fn get(&mut self) -> OtpResult<u32>

Generate a one-time passcode