84 lines
1.9 KiB
PHP
84 lines
1.9 KiB
PHP
<?php
|
|
namespace Shaarli;
|
|
|
|
/**
|
|
* Manages the server-side session
|
|
*/
|
|
class SessionManager
|
|
{
|
|
protected $session = [];
|
|
|
|
/**
|
|
* Constructor
|
|
*
|
|
* @param array $session The $_SESSION array (reference)
|
|
* @param ConfigManager $conf ConfigManager instance
|
|
*/
|
|
public function __construct(& $session, $conf)
|
|
{
|
|
$this->session = &$session;
|
|
$this->conf = $conf;
|
|
}
|
|
|
|
/**
|
|
* Generates a session token
|
|
*
|
|
* @return string token
|
|
*/
|
|
public function generateToken()
|
|
{
|
|
$token = sha1(uniqid('', true) .'_'. mt_rand() . $this->conf->get('credentials.salt'));
|
|
$this->session['tokens'][$token] = 1;
|
|
return $token;
|
|
}
|
|
|
|
/**
|
|
* Checks the validity of a session token, and destroys it afterwards
|
|
*
|
|
* @param string $token The token to check
|
|
*
|
|
* @return bool true if the token is valid, else false
|
|
*/
|
|
public function checkToken($token)
|
|
{
|
|
if (! isset($this->session['tokens'][$token])) {
|
|
// the token is wrong, or has already been used
|
|
return false;
|
|
}
|
|
|
|
// destroy the token to prevent future use
|
|
unset($this->session['tokens'][$token]);
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Validate session ID to prevent Full Path Disclosure.
|
|
*
|
|
* See #298.
|
|
* The session ID's format depends on the hash algorithm set in PHP settings
|
|
*
|
|
* @param string $sessionId Session ID
|
|
*
|
|
* @return true if valid, false otherwise.
|
|
*
|
|
* @see http://php.net/manual/en/function.hash-algos.php
|
|
* @see http://php.net/manual/en/session.configuration.php
|
|
*/
|
|
public static function checkId($sessionId)
|
|
{
|
|
if (empty($sessionId)) {
|
|
return false;
|
|
}
|
|
|
|
if (!$sessionId) {
|
|
return false;
|
|
}
|
|
|
|
if (!preg_match('/^[a-zA-Z0-9,-]{2,128}$/', $sessionId)) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
}
|