Struct libotp::TOTP

pub struct TOTP { /* fields omitted */ }

Provides Time based One Time Passwords.

References

• This object implements utilities for RFC6328.

Methods

impl TOTP

fn new(secret: HOTP, time_step: u64, start_time: u64) -> TOTP

Creates a new TOTP instance.

Arguments

• secret - HOTP secret to use for TOTP generation.
• time_step - The time frame to allow every password, in seconds. RFC6238 recommends 30 seconds.
• start_time - Configurable T0 for OTP.

fn get_otp(&self, digits: u32, offset: i32) -> u32

Generates a time based OTP.

Arguments

• digits - Desired OTP length, should be at least 6.
• offset - Should be 0 for current time frame, -1 for previous, 1 for next, etc...

fn validate(&self, digits: u32, guess: u32, buffer: u32) -> bool

Validates the given OTP.

Arguments

• digits - The amount of digits set for the OTP.
• guess - The user provided guess to validate.
• buffer - Amount of OTPs to check before and after the current one (0=Only current, 1=Previous+Now+Next OTP, etc...)