# SPDX-FileCopyrightText: 2023 XWiki CryptPad Team <contact@cryptpad.org> and contributors
#
# SPDX-License-Identifier: AGPL-3.0-or-later

#   This file is included strictly as an example of how Nginx can be configured
#   to work with CryptPad. This example WILL NOT WORK AS IS. For best results,
#   compare the sections of this configuration file against a working CryptPad
#   installation (http server by the Nodejs process). If you are using CryptPad
#   in production and require professional support please contact sales@cryptpad.fr

server {
    listen 443 ssl;
    listen [::]:443 ssl;
    http2 on;

    # Let's Encrypt webroot
    include letsencrypt-webroot;

    # CryptPad serves static assets over these two domains.
    # `your-main-domain` is what users will enter in their address bar.
    # Privileged computation such as key management is handled in this scope
    # UI content is loaded via the `your-sandbox-domain`.
    # "Content Security Policy" headers prevent content loaded via the sandbox
    # from accessing privileged information.
    # This setup allows to take advantage of CryptPad's sandboxing techniques.
    # In the event of an XSS vulnerability in CryptPad's front-end code
    # this will limit the amount of information accessible to attackers.
    server_name your-main-domain.com your-sandbox-domain.com;

    # You'll need to Set the path to your certificates and keys here
    # IMPORTANT: this config is intended to serve assets for at least two domains
    # (your main domain and your sandbox domain). As such, you'll need to generate a single SSL certificate
    # that includes both domains in order for things to work as expected.
    ssl_certificate /etc/ssl/lets-encrypt/your-main-domain.com/cert;
    ssl_certificate_key /etc/ssl/lets-encrypt/your-main-domain.com/key;

    # diffie-hellman parameters are used to negotiate keys for your session
    # generate strong parameters using the following command
    ssl_dhparam /etc/nginx/dhparam.pem; # openssl dhparam -out /etc/nginx/dhparam.pem 4096

    # Speeds things up a little bit when resuming a session
    ssl_session_timeout 1d;
    ssl_session_cache shared:MozSSL:10m;
    ssl_session_tickets off;

    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;
    ssl_prefer_server_ciphers off;

    # HSTS (ngx_http_headers_module is required) (63072000 seconds)
    add_header Strict-Transport-Security "max-age=63072000; includeSubDomains" always;

    # OCSP stapling
    ssl_stapling on;
    ssl_stapling_verify on;

    # verify chain of trust of OCSP response using Root CA and Intermediate certs
    ssl_trusted_certificate /etc/ssl/certs/ca-certificates.crt;

    # replace with the IP address of your resolver
    resolver 8.8.8.8 8.8.4.4 1.1.1.1 1.0.0.1 9.9.9.9 149.112.112.112 208.67.222.222 208.67.220.220;

    location / {
        proxy_pass            http://localhost:3000;
        proxy_set_header      X-Real-IP $remote_addr;
        proxy_set_header      Host $host;
        proxy_set_header      X-Forwarded-For $proxy_add_x_forwarded_for;
        client_max_body_size  150m;

        proxy_http_version    1.1;
        proxy_set_header      Upgrade $http_upgrade;
        proxy_set_header      Connection upgrade;
    }
}