map $ssl_client_s_dn $ssl_client_s_dn_cn {
    default "anonymous";
    ~CN=(?<CN>[^/]+) $CN;
}

server {
    listen 443 ssl;
    server_name gerrit-ci-secure.gerritforge.com;

    ssl_certificate /etc/ssl/certs/cert.crt;
    ssl_certificate_key /etc/ssl/certs/cert.key;

    ssl_session_cache builtin:1000 shared:SSL:10m;
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers HIGH:!aNULL:!eNULL:!EXPORT:!CAMELLIA:!DES:!MD5:!PSK:!RC4;
    ssl_prefer_server_ciphers on;

    ssl_client_certificate /etc/ssl/certs/auth_ca.crt;
    ssl_verify_client on;

    ssl_session_timeout 5m;

    location / {
        sendfile off;
        proxy_http_version 1.1;

        proxy_pass http://jenkins:38080;
        proxy_redirect http://jenkins:38080 https://gerrit-ci.gerritforge.com;

        proxy_set_header Authorization "";
        proxy_set_header X-Forwarded-User $ssl_client_s_dn_cn;

        proxy_set_header 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-Host $host:$server_port;
        proxy_set_header X-Forwarded-Server $host;
        proxy_set_header X-Forwarded-Proto $scheme;

        proxy_max_temp_file_size 0;

        proxy_connect_timeout 90;
        proxy_send_timeout 90;
        proxy_read_timeout 90;

        proxy_buffer_size 4k;
        proxy_buffers 4 32k;
        proxy_busy_buffers_size 64k;
        proxy_temp_file_write_size 64k;

        # Set maximum upload size
        client_max_body_size 10m;
        client_body_buffer_size 128k;

        # Required for new HTTP-based CLI
        proxy_request_buffering off;
    }
}