Check the existence of a session (Nginx)

Question

I have two sessions in PHP:

$_SESSION["session"]["key"] = md5 ($token . $userAgent . $ip);
$_SESSION["session"]["timeout"] = time ();

Just want to check that sessions with nginx, tried this code without success:

location / {
    if ($request_filename ~* "index.php") {
        break;
    }

    if ($http_cookie ~* "session") {
        break;
    }

    rewrite ^.+$ https://localhost/index.php last;
}

Any clues ?

Thanks.

Answer 1

a cookie just holds the Session ID, an id is always created upon session_start(); so if your calling that within your script the user will always have a session id.

your best bet is too add a second cookie:

setcookie('session_key',md5 ($token . $userAgent . $ip));

then within nginx:

if ($http_cookie ~* "session_key")
{
    break;
}

to check if that cookie is set.

If the hash is sensitive then do this:

setcookie('session_key_active','1');

Then in Nginx:

if ($http_cookie ~* "session_key_active")
{
    break;
}

But this is still vulnerable , always check server side values match!