rsotp - The Rust One-Time Password Library

rsotp is a Rust library for generating and verifying one-time passwords. It can be used to implement two-factor (2FA) or multi-factor (MFA) authentication methods in anywhere that requires users to log in.

Open MFA standards are defined in RFC 4226 (HOTP: An HMAC-Based One-Time Password Algorithm) and in RFC 6238 (TOTP: Time-Based One-Time Password Algorithm). rsotp implements server-side support for both of these standards.

rsotp was inspired by PyOTP.