There are 2 repositories under rfc-4226 topic.
:closed_lock_with_key: A PHP library for generating one time passwords according to RFC 4226 (HOTP) and the RFC 6238 (TOTP)
A small and easy-to-use one-time password generator library for Java implementing RFC 4226 (HOTP) and RFC 6238 (TOTP).
Time-Based One-Time Password (TOTP) and HMAC-Based One-Time Password (HOTP) library for Go.
A kotlin implementation of HOTP (RFC-4226) and TOTP (RFC-6238). Supports validation and generation of 2-factor authentication codes, recovery codes and randomly secure secrets.
One-time password PHP implementation of HMAC-based algorithm according to RFC 4226 and RFC 6238 compatible with Google Authenticator.
A Go implementation of RFC 4226 HOTP: An HMAC-Based One-Time Password Algorithm and RFC 6238: TOTP: Time-Based One-Time Password Algorithm
A simple OTP generator written in Swift.
Shell-script (Bash) with functions relevant to 2FA. Compatible with Google Authenticator.
Application and library for time-based one-time passwords as specified by RFC 6238
HMAC-Based One-Time Password Algorithm, as described in RFC 4226
🔐 Tiny & lightweight RFC 4226 & RFC 6238 compliant one-time password (HOTP/TOTP) generation & validation library for Java
An one-time password generation library written in Go, implementing HOTP (RFC-4226) and TOTP (RFC-6238).
A simple and straightforward HOTP and TOTP generation and verification library for .NET.
⚠️⚒️WIP⚒️⚠️ A truely RFC complient HOTP (https://www.rfc-editor.org/rfc/rfc4226) and TOTP (https://www.rfc-editor.org/rfc/) implementation which can be used on the server and client.
!!UNMAINTAINED!! A truely RFC complient HOTP (https://www.rfc-editor.org/rfc/rfc4226) and TOTP (https://www.rfc-editor.org/rfc/rfc6238) implementation which can be used on the server and client.
http://www.das-labor.org/wiki/LaborTageBadge2013
an http/https server configurator with simple user:pass or a shared secret for machine-machine rolling authentication and supporting middlewares
TOTP and HOTP Token for Andriod Devices
Google authenticator (HOTP & TOTP)