My experiments implementing the FIDO second factor specifications in C#.

Multiple libraries exists for the client-to-server communication parts but there is no good library to communicate with keys connected locally via USB.

Port of the Google Reference code has initially be done using Sharpen + Sharpen.Runtime.

While the code implements USB communications directly via Win32 APIs for now, I might also experiment with :

• HID API (GitHub) to get some cross-platform compatibility.
• Windows.Devices.HumanInterfaceDevice to get Windows 10 support. (Also to steal their nice API)

Other FIDO U2F Projects in .Net :

• FIDO U2F.Net MIT, Client only
• AspNetIdentity_U2F Apache License, Full port of the official Google code

In other languages :

• Yubico Java server

This repository is my playground, nothing is stable and it isn't intended to be. I'm just playing with low level APIs.