user www-data;
worker_processes  1;

error_log  stderr;

pid        /run/nginx/nginx.pid;


# Nginx requires this section, even if no options
events {
}

# Note that a lot of these settings come from the OWASP Secure
# Configuration guide for nginx
# https://www.owasp.org/index.php/SCG_WS_nginx
# and the OWASP Secure Headers project
# https://www.owasp.org/index.php/OWASP_Secure_Headers_Project
# and the mozilla security guidelines
# https://wiki.mozilla.org/Security/Server_Side_TLS

http {
    include       mime.types;

    # For certain locations, only allow one connection per IP
    limit_conn_zone $binary_remote_addr zone=addr:10m;

    # Default log format
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    # Comment out to enable access log in /var/log/nginx/
    access_log  off;

    client_body_timeout   30;
    client_header_timeout 10;
    keepalive_timeout     5 5;
    send_timeout          30;

    # Do not return nginx version to clients
    server_tokens  off;

    client_max_body_size 100k;
    client_body_buffer_size  100K;
    client_header_buffer_size 1k;
    large_client_header_buffers 4 8k;

    # redirect all http traffic to https
    server {
        listen 80 default_server;
        listen [::]:80 default_server;
        server_name _;
        return 301 https://$host$request_uri;
    }

    server {
        listen       443 ssl;
        server_name  127.0.0.1;

        ssl                  on;
        ssl_certificate      @CERTPATH@/cert.pem;
        ssl_certificate_key  @CERTPATH@/cert.pem;
        ssl_session_timeout  5m;
        ssl_protocols  TLSv1.2;
        ssl_ciphers "ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256";
        ssl_prefer_server_ciphers   on;

        add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload";

        location / {
                # This location lets us serve the static pre-compressed webui
                # content (rooted at /usr/share/www). Also if the URI points to
                # something else (that is unmatched by other locations), we
                # fallback to the rest server. This approach is based on the
                # guide at https://docs.nginx.com/nginx/admin-guide/web-server/serving-static-content.
                root /usr/share/www;
                # For clients that support gzip encoding, serve them
                # pre-compressed gzip content. For clients that don't,
                # uncompress on the BMC. The module gunzip requires
                # gzip_static to be set to 'always'; gzip_static is the
                # module that serves compressed content for clients that
                # support gzip.
                gunzip on;
                gzip_static always;
                try_files $uri $uri/ @rest_server;

                add_header X-Frame-Options deny;
                add_header X-XSS-Protection "1; mode=block";
                add_header X-Content-Type-Options nosniff;
                add_header Content-Security-Policy "frame-ancestors 'none'; default-src 'self' wss: 'unsafe-eval' 'unsafe-inline'";
                add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload";
                add_header Cache-Control "no-store,no-cache";
                add_header Pragma "no-cache";
                add_header Expires 0;
        }
        location @rest_server {
                # Use 127.0.0.1 instead of localhost since nginx will
                # first use ipv6 address of ::1 which the upstream server
                # is not listening on. This generates an error msg to
                # the journal. Nginx then uses the 127.0.0.1 and everything
                # works fine but want to avoid the error msg to the log.
                proxy_pass http://127.0.0.1:8081;

                # WebSocket support
                proxy_http_version 1.1;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection "upgrade";
                proxy_set_header X-Forwarded-For $remote_addr;
        }
        location ~ (/org/openbmc/control/flash/bmc/action/update|/upload/image|/download/dump) {
                 # Marked as 33MB to allow for firmware image updating and dump
                 # downloads
                 client_max_body_size 33M;

                 # Only 1 connection at a time here from an IP
                 limit_conn addr 1;

                 proxy_pass http://127.0.0.1:8081;
        }
        location /redfish {
                proxy_pass http://127.0.0.1:8082;
                proxy_http_version 1.1;
        }

        include /etc/nginx/sites-enabled/443_*.conf;
    }
}