# nginx 1.20.x

load_module modules/ngx_http_brotli_static_module.so;

user nginx;
worker_processes auto;
worker_rlimit_nofile 16384;
pid /run/nginx.pid;

events {
    worker_connections 4096;
}

http {
    include mime.types;
    default_type application/octet-stream;

    charset utf-8;

    sendfile on;
    sendfile_max_chunk 512k;
    tcp_nopush on;
    keepalive_timeout 3m;
    server_tokens off;
    msie_padding off;

    client_max_body_size 1k;
    client_body_buffer_size 1k;
    client_header_buffer_size 1k;
    large_client_header_buffers 4 4k;
    http2_recv_buffer_size 128k;

    client_body_timeout 30s;
    client_header_timeout 30s;
    send_timeout 30s;

    http2_max_concurrent_streams 32;
    limit_conn_status 429;
    limit_conn_zone $binary_remote_addr zone=addr:10m;
    limit_conn addr 256;

    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256;
    ssl_prefer_server_ciphers on;
    ssl_conf_command Options PrioritizeChaCha;

    ssl_certificate /etc/letsencrypt/live/grapheneos.org/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/grapheneos.org/privkey.pem;

    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 1d;
    # maintained by nginx-rotate-session-ticket-keys in ramfs
    ssl_session_ticket_key session-ticket-keys/4.key;
    ssl_session_ticket_key session-ticket-keys/3.key;
    ssl_session_ticket_key session-ticket-keys/2.key;
    ssl_session_ticket_key session-ticket-keys/1.key;
    ssl_buffer_size 4k;

    ssl_trusted_certificate /etc/letsencrypt/live/grapheneos.org/chain.pem;
    ssl_stapling on;
    ssl_stapling_verify on;
    # maintained by certbot-ocsp-fetcher
    ssl_stapling_file ocsp-cache/grapheneos.org.der;

    log_format main '$remote_addr - $remote_user [$time_local] '
                    '"$request_method $scheme://$host$request_uri $server_protocol" $status $body_bytes_sent '
                    '"$http_referer" "$http_user_agent"';
    access_log /var/log/nginx/access.log main buffer=64k flush=1m;
    error_log /var/log/nginx/error.log;
    log_not_found off;

    gzip_proxied any;
    gzip_vary on;

    if_modified_since before;

    map $http_cookie $preload_resources {
        "~*__Host-preload=1" "";
        default "</main.css>; rel=preload; as=style, </fonts/roboto-v20-regular-latin.woff2>; rel=preload; as=font; crossorigin, </fonts/roboto-v20-bold-latin.woff2>; rel=preload; as=font; crossorigin, </mask-icon.svg>; rel=preload; as=image";
    }

    server {
        listen 80 backlog=4096;
        listen [::]:80 backlog=4096;
        server_name grapheneos.org www.grapheneos.org grapheneos.app www.grapheneos.app grapheneos.com www.grapheneos.com grapheneos.info www.grapheneos.info grapheneos.ovh www.grapheneos.ovh grapheneos.page www.grapheneos.page vanadium.app www.vanadium.app;

        root /var/empty;

        # use $host to set up HSTS for redirect domains
        return 301 https://$host$request_uri;
    }

    server {
        listen 443 ssl http2 backlog=4096;
        listen [::]:443 ssl http2 backlog=4096;
        server_name www.grapheneos.org grapheneos.app www.grapheneos.app grapheneos.com www.grapheneos.com grapheneos.info www.grapheneos.info grapheneos.ovh www.grapheneos.ovh grapheneos.page www.grapheneos.page;

        root /var/empty;

        include snippets/security-headers.conf;
        add_header Cross-Origin-Resource-Policy "same-origin" always;

        return 301 https://grapheneos.org$request_uri;
    }

    server {
        listen 443 ssl http2;
        listen [::]:443 ssl http2;
        server_name vanadium.app www.vanadium.app;

        root /var/empty;

        include snippets/security-headers.conf;
        add_header Cross-Origin-Resource-Policy "same-origin" always;

        return 302 https://github.com/GrapheneOS/Vanadium;
    }

    server {
        listen 443 ssl http2;
        listen [::]:443 ssl http2;
        server_name grapheneos.org;

        root /srv/grapheneos.org;
        error_page 403 =404 /404;
        error_page 404 /404;

        open_file_cache max=2048 inactive=1d;
        open_file_cache_valid 1d;

        include snippets/security-headers.conf;
        add_header Cross-Origin-Resource-Policy "same-origin" always;
        gzip_static on;
        brotli_static on;

        if ($request_uri ~ ^/(.*)\.html$) {
            return 301 /$1;
        }

        if ($request_uri ~ (.*)//(.*)) {
            return 301 $1/$2;
        }

        if ($request_uri ~ ^(.*)/index$) {
            return 301 $1/;
        }

        # https://www.twipu.com/GrapheneOS doesn't handle links with fragments properly
        if ($request_uri ~ "^/(.*)%3Ca%20href=$") {
            return 301 /$1;
        }

        location = /security.txt {
            return 301 /.well-known/security.txt;
        }

        location = /pdfviewer_privacy_policy {
            return 301 /pdfviewer-privacy-policy;
        }

        location = /bitcoin_address.png {
            return 301 /bitcoin-donation.png;
        }

        location = /bitcoin-address.png {
            return 301 /bitcoin-donation.png;
        }

        # mangled backlinks to /install
        location = /installMinimal {
            return 301 /install/;
        }

        # mangled backlink to /faq
        location = /fa {
            return 301 /faq;
        }

        # mangled backlinks to /usage#updates
        location = /updates {
            return 301 /usage#updates;
        }

        # broken link (now fixed) on https://noagendaphone.com/ with UTF-8 replacement character
        location = /%EF%BF%BC {
            return 301 /;
        }

        location = /web-install {
            return 301 /install/web;
        }

        location = /install-web {
            return 301 /install/web;
        }

        location = /cli/install {
            return 301 /install/cli;
        }

        location = /web/install {
            return 301 /install/web;
        }

        location = /LICENSE {
            return 301 /LICENSE.txt;
        }

        location = /generate_204 {
            return 301 /faq#default-connections;
        }

        location = /404 {
            internal;
            include snippets/security-headers.conf;
            add_header Cross-Origin-Resource-Policy "same-origin" always;
            include snippets/preload.conf;
            try_files $uri.html =404;
        }

        location = /favicon.ico {
            if ($http_accept ~ "image/svg\+xml") {
                rewrite ^ /favicon.svg last;
            }
            include snippets/security-headers.conf;
            # avoid breaking image hotlinking such as https://github.com/TryGhost/Ghost/issues/12880
            add_header Cross-Origin-Resource-Policy "cross-origin" always;
            add_header Cache-Control "public, max-age=604800";
        }

        location = /favicon.svg {
            include snippets/security-headers.conf;
            # avoid breaking image hotlinking such as https://github.com/TryGhost/Ghost/issues/12880
            add_header Cross-Origin-Resource-Policy "cross-origin" always;
            add_header Cache-Control "public, max-age=604800";
        }

        location = /mask-icon.svg {
            include snippets/security-headers.conf;
            add_header Cross-Origin-Resource-Policy "same-origin" always;
            add_header Cache-Control "public, max-age=31536000, immutable";
        }

        location = /.well-known/matrix/client {
            add_header Access-Control-Allow-Origin "*";
            default_type application/json;
        }

        location = /.well-known/matrix/server {
            default_type application/json;
        }

        location ^~ /fonts/ {
            include snippets/security-headers.conf;
            add_header Cross-Origin-Resource-Policy "same-origin" always;
            add_header Cache-Control "public, max-age=31536000, immutable";
            gzip_static off;
            brotli_static off;
        }

        location ~ "\.webmanifest$" {
            include snippets/security-headers.conf;
            add_header Cross-Origin-Resource-Policy "same-origin" always;
            add_header Cache-Control "public, max-age=604800";
        }

        location ~ "\.(css|js|map|mjs)$" {
            include snippets/security-headers.conf;
            add_header Cross-Origin-Resource-Policy "same-origin" always;
            add_header Cache-Control "public, max-age=31536000, immutable";
        }

        location ~ "\.png$" {
            include snippets/security-headers.conf;
            # avoid breaking image hotlinking such as https://github.com/TryGhost/Ghost/issues/12880
            add_header Cross-Origin-Resource-Policy "cross-origin" always;
            add_header Cache-Control "public, max-age=31536000";
            gzip_static off;
            brotli_static off;
        }

        location ~ "\.(atom|pdf)$" {
            include snippets/security-headers.conf;
            # Chromium PDF range requests use wrong origin: https://bugs.chromium.org/p/chromium/issues/detail?id=1074261
            # Thunderbird uses wrong origin for feeds: https://bugzilla.mozilla.org/show_bug.cgi?id=1698755
            add_header Cross-Origin-Resource-Policy "cross-origin" always;
            add_header Cache-Control "public, max-age=1800";
        }

        location ~ "\.(json|txt|xml)$" {
            include snippets/security-headers.conf;
            add_header Cross-Origin-Resource-Policy "same-origin" always;
            add_header Cache-Control "public, max-age=1800";
        }

        location ~ "\.(br|gz)$" {
            internal;
        }

        location ~ "/$" {
            include snippets/security-headers.conf;
            add_header Cross-Origin-Resource-Policy "same-origin" always;
            add_header Cache-Control "public, no-cache";
            include snippets/preload.conf;
            try_files ${uri}index.html @noslash;
        }

        # redirect /path/ to /path if /path.html exists
        location @noslash {
            rewrite ^(.*)/$ $1;
            if (-f $request_filename.html) {
                rewrite ^(.*) $1 permanent;
            }
            return 404;
        }

        location = /install/web {
            include snippets/security-headers-base.conf;
            add_header Content-Security-Policy "default-src 'none'; child-src 'self'; connect-src 'self' https://releases.grapheneos.org/; font-src 'self'; img-src 'self'; manifest-src 'self'; script-src 'self'; style-src 'self'; form-action 'none'; frame-ancestors 'none'; block-all-mixed-content; base-uri 'none'" always;
            add_header Permissions-Policy "accelerometer=(), ambient-light-sensor=(), autoplay=(), battery=(), camera=(), clipboard-read=(), clipboard-write=(), display-capture=(), document-domain=(), encrypted-media=(), fullscreen=(), geolocation=(), gyroscope=(), hid=(), interest-cohort=(), magnetometer=(), microphone=(), midi=(), payment=(), picture-in-picture=(), publickey-credentials-get=(), screen-wake-lock=(), serial=(), sync-xhr=(), xr-spatial-tracking=()" always;
            add_header Cross-Origin-Resource-Policy "same-origin" always;
            add_header Cache-Control "public, no-cache";
            include snippets/preload.conf;
            try_files $uri.html =404;
        }

        location / {
            include snippets/security-headers.conf;
            add_header Cross-Origin-Resource-Policy "same-origin" always;
            add_header Cache-Control "public, no-cache";
            include snippets/preload.conf;
            try_files $uri.html $uri/ =404;
        }
    }

    server {
        listen 80;
        listen [::]:80;
        server_name mta-sts.grapheneos.org mta-sts.mail.grapheneos.org mta-sts.grapheneos.app mta-sts.grapheneos.com mta-sts.grapheneos.info mta-sts.grapheneos.ovh mta-sts.grapheneos.page mta-sts.vanadium.app;

        root /var/empty;

        return 301 https://$host$request_uri;
    }

    server {
        listen 443 ssl http2;
        listen [::]:443 ssl http2;
        server_name mta-sts.grapheneos.org mta-sts.mail.grapheneos.org mta-sts.grapheneos.app mta-sts.grapheneos.com mta-sts.grapheneos.info mta-sts.grapheneos.ovh mta-sts.grapheneos.page mta-sts.vanadium.app;

        root /srv/mta-sts;

        include snippets/security-headers.conf;
        add_header Cross-Origin-Resource-Policy "same-origin" always;

        location = / {
            return 301 https://grapheneos.org/articles/grapheneos-servers;
        }

        location = /.well-known/mta-sts.txt {}

        location / {
            return 404;
        }
    }

    server {
        listen 127.0.0.1:81;
        listen [::1]:81;

        location /nginx_status {
            stub_status;
            access_log off;
        }
    }
}