# partly generated 2022-01-08, Mozilla Guideline v5.6, nginx 1.17.7, OpenSSL 1.1.1k, intermediate configuration
# https://ssl-config.mozilla.org/#server=nginx&version=1.17.7&config=intermediate&openssl=1.1.1k&guideline=5.6
server {
    # Listen on a custom port for the proxy protocol.
    listen [::]:8443 ssl http2 proxy_protocol;
    # Make use of the ngx_http_realip_module to set the $remote_addr and
    # $remote_port to the client address and client port, when using proxy
    # protocol.
    # First set our proxy protocol proxy as trusted.
    set_real_ip_from 2a00:14b0:4200:3000:125::1;
    # Then tell the realip_module to get the addreses from the proxy protocol
    # header.
    real_ip_header proxy_protocol;

    server_name acmedns.hamburg.ccc.de;

    root /ansible_docker_compose/configs/html/;

    ssl_certificate /etc/letsencrypt/live/acmedns.hamburg.ccc.de/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/acmedns.hamburg.ccc.de/privkey.pem;
    # verify chain of trust of OCSP response using Root CA and Intermediate certs
    ssl_trusted_certificate /etc/letsencrypt/live/acmedns.hamburg.ccc.de/chain.pem;

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

    proxy_set_header Host $host;
    proxy_set_header X-Forwarded-Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Port 443;
    # This is https in any case.
    proxy_set_header X-Forwarded-Proto https;
    # Hide the X-Forwarded header.
    proxy_hide_header X-Forwarded;
    # Assume we are the only Reverse Proxy (well using Proxy Protocol, but that
    # is transparent).
    # Also provide "_hidden" for by, since it's not relevant.
    proxy_set_header Forwarded "for=$remote_addr;proto=https;host=$host;by=_hidden";
    proxy_buffer_size 8k; # needed for oauth2-proxy to work correctly
    port_in_redirect off;

    location /oauth2/ {
        proxy_pass       http://127.0.0.1:4180;
        proxy_set_header Host                    $host;
        proxy_set_header X-Real-IP               $remote_addr;
        proxy_set_header X-Auth-Request-Redirect $request_uri;
        # or, if you are handling multiple domains:
        # proxy_set_header X-Auth-Request-Redirect $scheme://$host$request_uri;
    }

    location = /oauth2/auth {
        proxy_pass       http://127.0.0.1:4180;
        proxy_set_header Host             $host;
        proxy_set_header X-Real-IP        $remote_addr;
        proxy_set_header X-Forwarded-Uri  $request_uri;
        # nginx auth_request includes headers but not body
        proxy_set_header Content-Length   "";
        proxy_pass_request_body           off;
    }

    location = / {
        auth_request /oauth2/auth;
        error_page 401 = @oauth2_signin;

        index index.html;
    }

    location = /register {
        auth_request /oauth2/auth;
        error_page 401 = @oauth2_signin;

        proxy_pass http://127.0.0.1:8080/register;
    }

    location = /update { # no auth by proxy required
        proxy_pass http://127.0.0.1:8080/update;
    }

    location = /health { # no auth by proxy required
        proxy_pass http://127.0.0.1:8080/health;
    }

    location @oauth2_signin {
        return 302 /oauth2/sign_in?rd=$scheme://$host$request_uri;
    }
}