simpleSamlPHP isAuthenticated always returning false

Question

I just started developing with simplesamlPHP. I installed simpleSamlPhp and I followed the steps given in https://simplesamlphp.org/docs/development/simplesamlphp-sp-api to integrate my php application with simpleSAMLPhp and I am using the simpleSaml APIs given in the document.

Below is the code:

require_once('/var/simplesamlphp/lib/_autoload.php');
$auth = new \SimpleSAML\Auth\Simple('default-sp');
if($auth->isAuthenticated()){
  $attributes = $auth->getAttributes();
}else{
  echo "Not authenticated";
  $auth->requireAuth();
}

$auth->isAuthenticated() is always returning false. Do I need to do anything else? or am I missing something?

Answer 1

Before calling isAuthenticated(), you need to call requireAuth(). The idea is that you request authentication against an entity and later on you are able to check if the user is authenticated or not.

require_once('/var/simplesamlphp/lib/_autoload.php');
$auth = new \SimpleSAML\Auth\Simple('default-sp');
$auth->requireAuth();
if($auth->isAuthenticated()){
   $attributes = $auth->getAttributes();
}else{
   echo "Not authenticated";
}