Cookie Encryption -- a little help needed
Posted: Sun Jun 18, 2006 10:52 pm
Hi
I am trying to encrypt cookie using mcrypt rijindael 256. I am able to encrypt the cookie
but im not able to decrypt and retrieve values after the encryption. Here is the code
Any help would be very much appreciated
Thanks in advance
I am trying to encrypt cookie using mcrypt rijindael 256. I am able to encrypt the cookie
but im not able to decrypt and retrieve values after the encryption. Here is the code
Code: Select all
<?php
class securedata
{
private
$key,
$iv;
public function __construct()
{
$this->key = 'Four score and twenty years ago';
$this->iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB), MCRYPT_RAND);
}
public function encrypt($STR)
{
return mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $this->key, $STR, MCRYPT_MODE_CBC, $this->iv);
}
public function decrypt($STR)
{
return mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $this->key, $STR, MCRYPT_MODE_CBC, $this->iv);
}
}
$secure = new securedata;
?>Code: Select all
<?php
require_once "securedata_inc.php";
if (!isset($_COOKIE['EMITES'])) {
$expiry = time()+600; $path = '/';
$cookieset['sid'] = md5(uniqid(rand(), true));
$cookieset['user'] = 'Guest';
$cookieset['logintime'] = time();
$cookieset['ip'] = $_SERVER['REMOTE_ADDR'];
$cookieset['useragent'] = $_SERVER['HTTP_USER_AGENT'];
// Set the cookie
setcookie('EMITES', $secure->encrypt(serialize($cookieset)), $expiry, $path);
echo "<p>Cookie placed: ";
} else {
$cookie = unserialize(stripslashes($secure->decrypt($_COOKIE['EMITES'])));
echo '<p>Unserialized cookie:</p><pre>';
print_r($cookie);
echo '</pre>';
echo "<p>Session ID: {$cookie['sid']}</p>";
echo "<p>Login Time: {$cookie['logintime']}</p>";
}
?>Thanks in advance