This .NET library allows two factor authentication using either HOTP or TOTP.
A NuGet package is available at https://www.nuget.org/packages/Albireo.Otp/
This project is licensed under the MIT license, you can find a copy of the license in the LICENSE.txt file.
- Microsoft Visual Studio 2013
- Code Contracts
The Otp class has been adapted from Nathan Adams' OTPNet project and it has been re-licensed under the MIT license with permission from the author. Its full copyright chain is listed below.
- Copyright © 2011 Mark Percival https://github.com/mdp/rotp
- Copyright © 2011 Le Lag https://github.com/lelag/otphp
- Copyright © 2012 Nathan Adams https://github.com/nadams810/otpnet
- Copyright © 2014 Albireo https://github.com/kappa7194/otp
The tests vectors for the HOTP implementations are taken from RFC 4226's Appendix D.
The tests vectors for the TOTP implementations are taken from RFC 6238's Appendix B.