ZF2 - init or something that is called in every module controller - authentication

Question

I have a Module called "Backend" and in this module I want to check for valid authentication on all pages except the backend_login page. How do I do this? I tried to add it to the onBootstrap in the Backend/Module.php , but it turns out that is called in my other modules as well... which is of course not what I want.
So how do I do this?
Thanks in advance!

Answer 1

To get clear information about zf2 authentication you can follow:
ZF2 authentication
adapter auth
database table auth
LDAP auth
digest auth....These all are different methods here is an example of database table auth:
in every controller's action, where you need user auth something should like this:
use Zend\Authentication\Result;
use Zend\Authentication\AuthenticationService;
use Zend\Authentication\Adapter\AdapterInterface;
use Zend\Db\Adapter\Adapter as DbAdapter;
use Zend\Authentication\Adapter\DbTable as AuthAdapter;
public function login($credential)
{
$bcrypt = new Bcrypt();
$user = new User();
$auth = new AuthenticationService();
$user->exchangeArray($credential);
$password = $user->password;
$data = $this->getUserTable()->selectUser($user->username);
if (!$data){
$message = 'Username or password is not correct!';
}
elseif($auth->getIdentity() == $user->username){
$message = 'You have already logged in';
}
elseif($bcrypt->verify($password, $data->password)){
$sm = $this->getServiceLocator();
$dbAdapter = $sm->get('Zend\Db\Adapter\Adapter');
$authAdapter = new AuthAdapter(
$dbAdapter,
'user',
'username',
'password'
);
$authAdapter -> setIdentity($user->username) -> setCredential($data->password);
$result = $auth->authenticate($authAdapter);
$message = "Login succesfull.Welcome ".$result->getIdentity();
} else {
$message = 'Username or password is not correct';
}
return new ViewModel(array("message" =>$message));
}
Like this in every action you can check whether it is authenticated or not
if($auth -> hasIdentity()){
//your stuff
}
else{
//redirected to your login route;
}

Answer 2

I had once a similar problem and figured it out within my Module.php in the onBootstrap() function. Try this, it worked for me:
class Module {
// white list to access with being non-authenticated
//the list may contain action names, controller names as well as route names
protected $whitelist = array('login');
//....
public function onBootstrap($e){
$app = $e->getApplication();
$em = $app->getEventManager();
$sm = $app->getServiceManager();
$list = $this->whitelist;
$auth = new AuthenticationService();
$em->attach(MvcEvent::EVENT_ROUTE, function($e) use ($list, $auth) {
$match = $e->getRouteMatch();
// No route match, this is a 404
if (!$match instanceof RouteMatch) {
return;
}
// Route is whitelisted
$action = $match->getParam('action');
if (in_array($action, $list) ) {
return;
}
// User is authenticated
if ($auth->hasIdentity()){
return;
}
// the user isn't authenticated
// redirect to the user login page, as an example
$router = $e->getRouter();
$url = $router->assemble(array(
'controller' => 'auth',
'action'=>'login'
), array(
'name' => 'route_name',
));
$response = $e->getResponse();
$response->getHeaders()->addHeaderLine('Location', $url);
$response->setStatusCode(302);
return $response;
}, -100);
}
}
Or you may see bjyauthorize.