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<?php
namespace Model;
use Core\Request;
use SimpleValidator\Validator;
use SimpleValidator\Validators;
use Gregwar\Captcha\CaptchaBuilder;
/**
* Authentication model
*
* @package model
* @author Frederic Guillot
*/
class Authentication extends Base
{
/**
* Load automatically an authentication backend
*
* @access public
* @param string $name Backend class name
* @return mixed
*/
public function backend($name)
{
if (! isset($this->container[$name])) {
$class = '\Auth\\'.ucfirst($name);
$this->container[$name] = new $class($this->container);
}
return $this->container[$name];
}
/**
* Check if the current user is authenticated
*
* @access public
* @return bool
*/
public function isAuthenticated()
{
// If the user is already logged it's ok
if ($this->userSession->isLogged()) {
// Check if the user session match an existing user
if (! $this->user->exists($this->userSession->getId())) {
$this->backend('rememberMe')->destroy($this->userSession->getId());
$this->session->close();
return false;
}
return true;
}
// We try first with the RememberMe cookie
if ($this->backend('rememberMe')->authenticate()) {
return true;
}
// Then with the ReverseProxy authentication
if (REVERSE_PROXY_AUTH && $this->backend('reverseProxy')->authenticate()) {
return true;
}
return false;
}
/**
* Authenticate a user by different methods
*
* @access public
* @param string $username Username
* @param string $password Password
* @return boolean
*/
public function authenticate($username, $password)
{
if ($this->user->isLocked($username)) {
$this->container['logger']->error('Account locked: '.$username);
return false;
}
else if ($this->backend('database')->authenticate($username, $password)) {
$this->user->resetFailedLogin($username);
return true;
}
else if (LDAP_AUTH && $this->backend('ldap')->authenticate($username, $password)) {
$this->user->resetFailedLogin($username);
return true;
}
$this->handleFailedLogin($username);
return false;
}
/**
* Return true if the captcha must be shown
*
* @access public
* @param string $username
* @return boolean
*/
public function hasCaptcha($username)
{
return $this->user->getFailedLogin($username) >= BRUTEFORCE_CAPTCHA;
}
/**
* Handle failed login
*
* @access public
* @param string $username
*/
public function handleFailedLogin($username)
{
$this->user->incrementFailedLogin($username);
if ($this->user->getFailedLogin($username) >= BRUTEFORCE_LOCKDOWN) {
$this->container['logger']->critical('Locking account: '.$username);
$this->user->lock($username, BRUTEFORCE_LOCKDOWN_DURATION);
}
}
/**
* Validate user login form
*
* @access public
* @param array $values Form values
* @return array $valid, $errors [0] = Success or not, [1] = List of errors
*/
public function validateForm(array $values)
{
list($result, $errors) = $this->validateFormCredentials($values);
if ($result) {
if ($this->validateFormCaptcha($values) && $this->authenticate($values['username'], $values['password'])) {
$this->createRememberMeSession($values);
}
else {
$result = false;
$errors['login'] = t('Bad username or password');
}
}
return array($result, $errors);
}
/**
* Validate credentials syntax
*
* @access public
* @param array $values Form values
* @return array $valid, $errors [0] = Success or not, [1] = List of errors
*/
public function validateFormCredentials(array $values)
{
$v = new Validator($values, array(
new Validators\Required('username', t('The username is required')),
new Validators\MaxLength('username', t('The maximum length is %d characters', 50), 50),
new Validators\Required('password', t('The password is required')),
));
return array(
$v->execute(),
$v->getErrors(),
);
}
/**
* Validate captcha
*
* @access public
* @param array $values Form values
* @return boolean
*/
public function validateFormCaptcha(array $values)
{
if ($this->hasCaptcha($values['username'])) {
$builder = new CaptchaBuilder;
$builder->setPhrase($this->session['captcha']);
return $builder->testPhrase(isset($values['captcha']) ? $values['captcha'] : '');
}
return true;
}
/**
* Create remember me session if necessary
*
* @access private
* @param array $values Form values
*/
private function createRememberMeSession(array $values)
{
if (! empty($values['remember_me'])) {
$credentials = $this->backend('rememberMe')
->create($this->userSession->getId(), Request::getIpAddress(), Request::getUserAgent());
$this->backend('rememberMe')->writeCookie($credentials['token'], $credentials['sequence'], $credentials['expiration']);
}
}
}
|
