A software U2F Universal 2nd Factor implementation using threshold signatures.

The implementation uses a server side and a client side to create a valid U2F signature using threshold signatures. It uses Gotham-city for the server and client sides. The client side emulates a USB communication and runs as a software daemon.

The project is heavily inspired and based on rust-u2f, with the addition of TSS functionality.

Install rust (tested with version: rustc 1.40.0-nightly (084beb83e 2019-09-27))

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
rustup install nightly-2019-09-28-x86_64-unknown-linux-gnu
rustup defualt nightly-2019-09-28-x86_64-unknown-linux-gnu

Install dependencies

sudo yum install make
sudo yum -y update glibc
sudo yum install gmp
sudo yum install gmp-devel
sudo yum install openssl
sudo yum install openssl-devel
sudo yum install clang
sudo yum install systemd-devel
sudo yum install dbus-devel
sudo yum install selinux-policy-devel
sudo yum install rpm-build

cd linux
cargo build
make install

Change the storage from keyring to file

vim ~/.config/rustu2f/config.json

Change SecretService to File

Install node required for local server

sudo dnf module install nodejs:10

Build server

cd local-server
cargo build

Once all the dependencies are installed, run the client and server side on two different terminals.

cd local-server
cargo build
./target/debug/local-server

cd linux
cargo build
./target/debug/softu2f-user-daemon

Test u2f-core functionality

cd u2f-core
cargo test

Visit Yubikey demo and see how it works.