A CSharp implementation of the Time-Based One Time Password (TOTP) algorithm (RFC6238). Works with Google Authenticator.

TOTP, HOTP, HMAC-SHA1 implemented by MATLAB with test vector

Generate otp

Totp util base on rfc6238 for two step authentication

a TOTP library for golang

A simple library to assist with the generation of time-based and HMAC-based one-time passcodes for two-factor authentication.

Utility to provide automatic config generation for cisco any connect with enabled rfc6238 TOTP: Time-Based One-Time Password Algorithm

Simple but Secure Generic OTP, OCRA (RFC6287), TOTP (RFC6238) & HOTP (RFC4226) solution!

🔐 Tiny & lightweight RFC 4226 & RFC 6238 compliant one-time password (HOTP/TOTP) generation & validation library for Java

RFC 6238 TOTP アプリ

A Time-Based (RFC 6238) and HMAC-Based (RFC 4226) One-Time Password Algorithm Implementation in TypeScript. Used by Ordent project I maintain.

Modern .NET library for TOTP (RFC6238)

Cross-platform console C#/.Net implementation to generate one time passwords (TOTP/HOTP) for open authentication defined by standard RFC's (4226, 6238). Compatible with Google/Microsoft Authenticator apps.

Python 3 OTP Implementations

Python-based RFC6238 implementation that supports Steam Authenticator encoding

Go package for HOTP (RFC4226) and TOTP (RFC6238)

⚠️⚒️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.

[Completed] TOTP implemented with RFC2104, RFC3174, RFC4226, RFC6234, RFC6238

!!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.

Node.js One-Time Password