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POToken does not work
 

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  1. POToken does not work
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    <p>I want to use a token to secure my pages which are loaded via an AJAX-request (the basic idea is to prevent direct access of that page). So far so good.</p> <p>The problem is that both tokens do not match. It doesn't work.</p> <p>To create my token I use this function:</p> <pre><code>function generateFormToken($form) { $token = md5(uniqid(microtime(), true)); $_SESSION[$form.'_token'] = $token; return $token; } </code></pre> <p>To verify them I use this function:</p> <pre><code>function verifyFormToken($form) { if (!isset($_SESSION[$form.'_token'])) { return false; } if(!isset($_POST['token'])) { return false; } if ($_SESSION[$form.'_token'] !== $_POST['token']) { return false; } return true; } </code></pre> <p>In my form contact_form.php I create my token:</p> <pre><code>$newToken = generateFormToken('contactForm'); </code></pre> <p>Then I put that generated token into a hidden field:</p> <pre><code>&lt;input type="hidden" name="token" value="&lt;?php echo $newToken; ?&gt;" /&gt; </code></pre> <p>In my header of my website I start a session:</p> <pre><code>if (session_id() === '') { session_start(); } </code></pre> <p>The reason why I'm checking if there's already another session is because on my index.php-page there's a cookie set (without the check I get a PHP-error message saying that there's already a session):</p> <pre><code>if (isset($_COOKIE['ava_lastpage'])) { $prev_page = secure($_COOKIE['ava_lastpage']); } // Set current page if (!isset($_GET['task']) || (isset($_GET['task']) &amp;&amp; $_GET['task'] != 'register' &amp;&amp; $_GET['task'] != 'validate' &amp;&amp; $_GET['task'] != 'login' &amp;&amp; !isset($_GET['status']) || isset($_GET['status']) &amp;&amp; $_GET['status'] != 'reg_complete')) { setcookie('ava_lastpage', curPageUrl(), time()+60*60*24*100, '/'); } </code></pre> <p>This is my AJAX-request (contact.php is the file that shall be protected via a token):</p> <pre><code>$.ajax({ type:'POST', url: '&lt;?php echo $setting['site_url'] .'/';?&gt;includes/misc/contact.php', data:$('#contactForm').serialize(), }); </code></pre> <p>In my file contact.php I try to validate the token (which doesn't work):</p> <pre><code>if (verifyFormToken('contactForm')) { bla bla bla... </code></pre> <p>Please - any help?</p> <p>Update: The functions mentioned above can be found here:<a href="http://css-tricks.com/serious-form-security/" rel="nofollow">Serious Form Security</a></p>
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    1. USdrpelz
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    1. COStart with all the basic debug stuff. 1) check the error_log 2) `print_r($_SESSION); print_r($_POST);` 3) Open FireBug and check the AJAX request request/response headers to see what the cookies are doing.
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    2. COThanks! I'll check it out!
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    3. COOn my page contact.php I do not have access to my token of the superglobal $_SESSION. There's nothing...
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      1. USdrpelz
 

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