This project emulates a U2F HID device and proxies the data to paired U2F Bluetooth devices. We believe it works since all the Google/U2F provided tests pass for the HID layer. However, this code does not implement a full U2F token. Therefore, we can't guarantee that it works with your specific Bluetooth U2F token. If it doesn't, please let us know!

Getting Started

Build and Install the Code

$ mkdir build
$ cd build
$ meson --prefix=/usr ..
$ ninja install

Enable the Daemon

$ sudo systemctl enable --now u2fhid2bt.service

How it Works

1. First, we register with Bluez to say that we are interested in Bluetooth Low Energy GATT devices with the U2F GATT Service.

2. When such a device appears, we create an emulated HID U2F device. All packets sent to this emulated device are proxied to the Bluetooth device. This makes it seem like the Bluetooth device is actually plugged into USB.

3. Applications which work with USB U2F devices should transparently work with Bluetooth U2F devices.

License

This project is licensed under the Apache License, Version 2.0.