If I understand it correctly, it's to use fido2 without firefox or other browser. I support any spread of this and am looking forward to (having the time) to read it

But Linux already supports FIDO2 without Firefox, I use fido2 with sudo, LUKS and ssh keys (gpg as well, but it uses a custom agent). But maybe those use their own custom implementation of the fido protocol?

Didn't really look this up tbh, it just works right now.

sudo, LUKS, and OpenSSH each dynamically link and use Yubico's `libfido2`. That supports FIDO2 well on Linux.

Meaning this is an alternative to yubico libfido2, gotcha. Thanks.

Looks like a DBus API for FIDO2, so it would let any browser or non-browser app to authenticate via FIDO2. It looks pretty neat!

Ah that makes sense!

So it's a way to allow stuff to communicate with fido2 capable devices without having any dependency other than this and dbus, nice

As far as I can tell, it's a library that implements CTAP2 (which it erroneously refers to as webauthn).

This appears to be an alternative to Yubico's `libfido2`. It is software which OTHER software on your computer can use to connect to a FIDO2 authenticator over Bluetooth, USB, etc.

The primary benefit is that Firefox wants Rust-language code for FIDO2 support, so hopefully this library will (eventually) fill that gap and get Firefox-on-Linux to proper FIDO2 Webauthn support.

Hmmm but Firefox on Linux already supports FIDO2, I can login to github and gitlab just fine with the existing implementation.

I bet you're using U2F/FIDO1. Or, more precisely, I bet you're not using CTAP2.

An easy test is to set a PIN on your authenticator, which is an operation that is supported in CTAP2 and unsupported in CTAP1. Does Firefox prompt you for a PIN when you go to authenticate? If no, you're using CTAP1.

My token has a global pin which when o unlock, I can authorise any request with a simple click. But for ssh keys I do have a pin for each one. The websites I've tried never requested for a pin when setting up.

Also LUKS does use FIDO2 https://www.freedesktop.org/software/systemd/man/systemd-cry...

Firefox (only talking about Firefox here) does not use CTAP2, to the best of my knowledge. What you think is "FIDO2" is likely actually U2F/CTAP1. Backwards compatibility with that protocol is part of the FIDO2 spec, but it doesn't enable no-username-provided authentication. LUKS uses libfido2, which supports CTAP2 (and most of CTAP2.1).