# To set up SSL certificates using Let's Encrypt run:
#

#
# Also uncomment URL rewriting and SSL configuration below

# Basic DoS prevention measures
limit_conn addr 10;
client_body_timeout 5s;
client_header_timeout 5s;
limit_req_zone $binary_remote_addr  zone=api:10m rate=30r/m;
limit_conn_zone $binary_remote_addr zone=addr:10m;

# Backend configuration
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-SSL-CERT $ssl_client_cert;
proxy_connect_timeout 600;
proxy_send_timeout 600;
proxy_read_timeout 600;
send_timeout 600;

# Don't buffer any messages
nchan_message_buffer_length 0;

# To use CA-s own certificate for HTTPS
ssl_certificate /var/lib/certidude/{{ common_name }}/signed/{{ common_name }}.pem;
ssl_certificate_key /var/lib/certidude/{{common_name}}/self_key.pem;

# To use Let's Encrypt certificates
#ssl_certificate /etc/letsencrypt/live/{{common_name}}/fullchain.pem;
#ssl_certificate_key /etc/letsencrypt/live/{{common_name}}/privkey.pem;

# Also run the following to set up Let's Encrypt certificates:
#
#   apt install letsencrypt
#   certbot certonly -d {{common_name}} --webroot /var/www/html/

server {
    # Section for serving insecure HTTP, note that this is suitable for
    # OCSP, SCEP, CRL-s etc which is already covered by PKI protection mechanisms.
    # This also solves the chicken-and-egg problem of deploying the certificates

    server_name {{ common_name }};
    listen 80 default_server;

    # Proxy pass to backend
    location /api/ {
        proxy_pass http://127.0.1.1:8080/api/;
        limit_req zone=api burst=5;
    }

    # Path to static files
    root {{static_path}};

    # Path to compiled assets
    location /assets/ {
        alias {{ assets_dir }}/;
    }

    # Rewrite /cgi-bin/pkiclient.exe to /api/scep for SCEP protocol
    location /cgi-bin/pkiclient.exe {
        rewrite /cgi-bin/pkiclient.exe /api/scep/ last;
    }

    {% if not push_server %}
    # Long poll for CSR submission
    location ~ "^/lp/sub/(.*)" {
        nchan_channel_id $1;
        nchan_subscriber longpoll;
    }
    {% endif %}

    # Comment everything below in this server definition if you're using HTTPS

    {% if not push_server %}
    # Event source for web interface
    location ~ "^/ev/sub/(.*)" {
        nchan_channel_id $1;
        nchan_subscriber eventsource;
    }
    {% endif %}

    # Uncomment following to enable HTTPS
    #rewrite ^/$ https://$server_name$request_uri? permanent;
}

server {
    # Section for accessing web interface over HTTPS
    listen 443 ssl http2 default_server;
    server_name {{ common_name }};

    # HSTS header below should make sure web interface will be accessed over HTTPS only
    # once it has been configured
    add_header Strict-Transport-Security "max-age=15768000; includeSubDomains; preload;";

    # Proxy pass to backend
    location /api/ {
        proxy_pass http://127.0.1.1:8080/api/;
        limit_req zone=api burst=5;
    }

    # Path to static files
    root {{static_path}};

    # Path to compiled assets
    location /assets/ {
        alias {{ assets_dir }}/;
    }

    # This is for Let's Encrypt enroll/renewal
    location /.well-known/ {
        alias /var/www/html/.well-known/;
    }

    {% if not push_server %}
    # Event stream for pushing events to web browsers
    location ~ "^/ev/sub/(.*)" {
        nchan_channel_id $1;
        nchan_subscriber eventsource;
    }
    {% endif %}
}


server {
    # Section for certificate authenticated HTTPS clients,
    # for submitting information to CA eg. leases
    # and for delivering scripts to clients

    server_name {{ common_name }};
    listen 8443 ssl http2;

    # Require client authentication with certificate
    ssl_verify_client on;
    ssl_client_certificate /var/lib/certidude/{{ common_name }}/ca_cert.pem;

    # Proxy pass to backend
    location /api/ {
        proxy_pass http://127.0.1.1:8080/api/;
        limit_req zone=api burst=5;
    }

    # Long poll
    location ~ "^/lp/sub/(.*)" {
        nchan_channel_id $1;
        nchan_subscriber longpoll;
    }
}

{% if not push_server %}
server {
    # Allow publishing only from localhost to prevent abuse
    server_name localhost;
    listen 127.0.0.1:80;

    location ~ "^/lp/pub/(.*)" {
        nchan_publisher;
        nchan_channel_id $1;
    }

    location ~ "^/ev/pub/(.*)" {
        nchan_publisher;
        nchan_channel_id $1;
    }
}
{% endif %}