In this branch, we integrate our tweaked implementation of the crystals post-quantum algorithms in the Go implementation of Wireguard following the Fujioka contruction. Please refer to our blog-post for more information.

We are currently working on overriding the wg(8) commands to allow the users to input Kyber keys. For now, the key pair and the peers' key must be given within a configuration file when starting the interface, using the -c or --config_file flag followed by the .conf file. We included examples of such file (see peer0.conf) to showcase the accepted format and required fields.

This requires an installation of go ≥ 1.13.

$ git clone https://github.com/kudelskisecurity/pq-wireguard
$ cd pq-wireguard
$ go build

Most Linux kernel WireGuard users are used to adding an interface with ip link add wg0 type wireguard. With wireguard-go, instead simply run:

$ ./wireguard -c peerX.conf wg0

This will create an interface and fork into the background. To remove the interface, use the usual ip link del wg0, or if your system does not support removing interfaces directly, you may instead remove the control socket via rm -f /var/run/wireguard/wg0.sock, which will result in wireguard-go shutting down.

To run wireguard-go without forking to the background, pass -f or --foreground:

$ ./wireguard -f -c peerX.conf wg0

When an interface is running, you may use the usual ip(8) and ifconfig(8) commands ip addr add X.X.X.X/X dev wg0 and ip link set wg0 up. See the original wireguard-go README for more details

To run with more logging you may set the environment variable LOG_LEVEL=debug.

The public and private keys can be generated and printed using the --keygen flag.

$ ./wireguard --keygen

The IP address to use as endpoint can be extracted using the ip addr command. The port to be used can be randomly assigned among the free ports. The protocol version is set to 1, the booleans replace_allowed_ips and replace_peers are set to true.

You can watch below the video of two peers being configured side-by-side.

https://drive.google.com/file/d/1kjXPb9SclK9umB4hkgHnJSDSagKoxhQX/view?usp=sharing

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