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<?php |
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namespace Core\Modules; |
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use Core\Container; |
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use Core\JsonException; |
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/** |
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* Class Csrf |
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* @package Core |
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*/ |
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class Csrf extends Module |
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{ |
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/** |
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* our session object |
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* @var \Core\Dependency\Session |
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*/ |
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private $session; |
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/** |
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* On construct, we immediately set the CSRF token |
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* |
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* Csrf constructor. |
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* @param Container $container |
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* |
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*/ |
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public function __construct(Container $container) |
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{ |
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parent::__construct($container); |
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$this->session = $this->container->getSession(); |
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//Setting up csrf token security for all calls |
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$this->setCsrf(); |
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} |
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/** |
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* We set our CSRF token if none is already set |
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* |
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*/ |
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public function setCsrf(): void |
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{ |
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if (!$this->session->isParamSet('csrf_token')) { |
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try { |
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$rand = random_bytes(32); |
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$hash = bin2hex($rand); |
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$this->session->set('csrf_token', $hash); |
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} catch (\Exception $e) { |
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echo 'Random generator not present on server: ' . $e->getMessage(); |
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} |
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} |
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} |
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/** |
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* Gets the Csrf stored in the session |
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* @return mixed |
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*/ |
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public function getCsrfKey() |
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{ |
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return $this->session->get('csrf_token'); |
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} |
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/** |
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* Checks if the csrf_token passed in the header via JSON is the same as the token stored in the session |
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* |
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* @throws JsonException |
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*/ |
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public function checkJsonCsrf(): void |
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{ |
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$this->container->getResponse()->setHeaderContentType('json'); |
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$headers = $this->container->getRequest()->getHeaders(); |
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if (!isset($headers['csrf_token'])) { |
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throw new JsonException('No CSRF token.'); |
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} |
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if ($headers['csrf_token'] !== $this->getCsrfKey()) { |
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throw new JsonException('Wrong CSRF token.'); |
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} |
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} |
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} |
Starbugstone /
blogoc
