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<?php |
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/** |
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* WebHemi. |
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* |
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* PHP version 7.1 |
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* |
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* @copyright 2012 - 2018 Gixx-web (http://www.gixx-web.com) |
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* @license https://opensource.org/licenses/MIT The MIT License (MIT) |
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* |
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* @link http://www.gixx-web.com |
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*/ |
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declare(strict_types = 1); |
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namespace WebHemi\Middleware\Security; |
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use Generator; |
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use RecursiveArrayIterator; |
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use RecursiveIteratorIterator; |
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use RuntimeException; |
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use WebHemi\CSRF\ServiceInterface as CSRFInterface; |
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use WebHemi\Http\ResponseInterface; |
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use WebHemi\Http\ServerRequestInterface; |
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use WebHemi\Middleware\MiddlewareInterface; |
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/** |
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* Class CSRFMiddleware. |
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*/ |
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class CSRFMiddleware implements MiddlewareInterface |
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{ |
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/** |
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* @var CSRFInterface |
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*/ |
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private $csrfAdapter; |
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/** |
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* AclMiddleware constructor. |
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* |
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* @param CSRFInterface $csrfAdapter |
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*/ |
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public function __construct(CSRFInterface $csrfAdapter) |
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{ |
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$this->csrfAdapter = $csrfAdapter; |
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} |
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/** |
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* A middleware is a callable. It can do whatever is appropriate with the Request and Response objects. |
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* The only hard requirement is that a middleware MUST return an instance of \Psr\Http\Message\ResponseInterface. |
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* Each middleware SHOULD invoke the next middleware and pass it Request and Response objects as arguments. |
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* |
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* @param ServerRequestInterface $request |
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* @param ResponseInterface $response |
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* @throws RuntimeException |
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* @return void |
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*/ |
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public function __invoke(ServerRequestInterface&$request, ResponseInterface&$response) : void |
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{ |
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// Get requests will not harm |
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if ($request->getMethod() == 'GET') { |
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return; |
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} |
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$csrfToken = ''; |
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foreach ($this->recursiveFind($request->getParsedBody(), CSRFInterface::SESSION_KEY) as $value) { |
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$csrfToken = $value; |
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break; |
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} |
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if (empty($csrfToken)) { |
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throw new RuntimeException('CSRF token is missing from the request', 405); |
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} |
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$tokenTTL = $request->isXmlHttpRequest() ? null : CSRFInterface::SESSION_TTL_IN_SECONDS; |
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$allowMultipleUse = $request->isXmlHttpRequest(); |
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$result = $this->csrfAdapter->verify($csrfToken, $tokenTTL, $allowMultipleUse); |
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if (!$result) { |
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throw new RuntimeException('The provided CSRF token is not valid or outdated.', 403); |
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} |
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} |
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/** |
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* @param array $haystack |
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* @param $needle |
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* @return Generator |
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*/ |
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protected function recursiveFind(array $haystack, $needle) |
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{ |
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$iterator = new RecursiveArrayIterator($haystack); |
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$recursive = new RecursiveIteratorIterator( |
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$iterator, |
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RecursiveIteratorIterator::SELF_FIRST |
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); |
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foreach ($recursive as $key => $value) { |
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if ($key === $needle) { |
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yield $value; |
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} |
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} |
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} |
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} |
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Gixx /
WebHemi
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