Requirements

Dependency	Version
rustup	1.50.0
openssl	1.1.1

Setup

Step 1: Generate an X25519 key pair

openssl genpkey -algorithm x25519 -out x25519_private_key.pem
openssl pkey -in x25519_private_key.pem -pubout -out x25519_public_key.pem

Make sure you're pointing to the right openssl installation (e.g. macOS provides an old default implementation that doesn't have the X25519 algorithm).

Step 2: Generate an SSL certificate

apt install certbot // Only if you don't have certbot installed already
certbot certonly

Follow the instructions on-screen and then copy (don't move) the generated certificate and private key to the session-open-group folder (you'll need to rename them to tls_private_key.pem and tls_certificate respectively as well).

Just want to run locally?

Open src/main.rs and replace the following lines:

warp::serve(routes)
    .tls()
    .cert_path("tls_certificate.pem")
    .key_path("tls_private_key.pem")
    .run(([0, 0, 0, 0], 443))
    .await;

by:

warp::serve(routes)
    .run(([127, 0, 0, 1], 8080))
    .await;

Step 3: Build the project

cargo build

The Linux Rust installer assumes that you already have a C linker installed. If this is not the case you'll see error: linker 'cc' not found. To fix this, run:

apt update
sudo apt install build-essential

Step 4: Run it

cargo run --release