54 lines
1.0 KiB
PHP
54 lines
1.0 KiB
PHP
<?php
|
|
|
|
namespace Icinga\Module\Director\Web\Form;
|
|
|
|
class CsrfToken
|
|
{
|
|
/**
|
|
* Check whether the given token is valid
|
|
*
|
|
* @param string $token Token
|
|
*
|
|
* @return bool
|
|
*/
|
|
public static function isValid($token)
|
|
{
|
|
if (strpos($token, '|') === false) {
|
|
return false;
|
|
}
|
|
|
|
list($seed, $token) = explode('|', $elementValue);
|
|
|
|
if (!is_numeric($seed)) {
|
|
return false;
|
|
}
|
|
|
|
return $token === hash('sha256', self::getSessionId() . $seed);
|
|
}
|
|
|
|
/**
|
|
* Create a new token
|
|
*
|
|
* @return string
|
|
*/
|
|
public static function generate()
|
|
{
|
|
$seed = mt_rand();
|
|
list ($seed, $token) = hash('sha256', self::getSessionId() . $seed);
|
|
|
|
return sprintf('%s|%s', $seed, $token);
|
|
}
|
|
|
|
/**
|
|
* Get current session id
|
|
*
|
|
* TODO: we should do this through our App or Session object
|
|
*
|
|
* @return string
|
|
*/
|
|
protected static function getSessionId()
|
|
{
|
|
return session_id();
|
|
}
|
|
}
|