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<?php |
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/** |
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* abstract strategy for checking auth against parts of the request |
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*/ |
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namespace Graviton\SecurityBundle\Authentication\Strategies; |
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use Symfony\Component\HttpFoundation\HeaderBag; |
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use Symfony\Component\HttpFoundation\ParameterBag; |
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use Symfony\Component\HttpFoundation\Response; |
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use Symfony\Component\HttpKernel\Exception\HttpException; |
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/** |
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* Class AbstractHttpStrategy |
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* |
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* @author List of contributors <https://github.com/libgraviton/graviton/graphs/contributors> |
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* @license http://opensource.org/licenses/gpl-license.php GNU Public License |
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* @link http://swisscom.ch |
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*/ |
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abstract class AbstractHttpStrategy implements StrategyInterface |
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{ |
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/** |
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* Extracts information from the a request header field. |
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* |
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* @param ParameterBag|HeaderBag $header object representation of the request header. |
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* @param string $fieldname Name of the field to be read. |
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* |
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* @return string |
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*/ |
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protected function extractFieldInfo($header, $fieldname) |
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{ |
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if ($header instanceof ParameterBag || $header instanceof HeaderBag) { |
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$this->validateField($header, $fieldname); |
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return $header->get($fieldname, ''); |
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} |
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throw new \InvalidArgumentException('Provided request information are not valid.'); |
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} |
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/** |
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* Verifies that the provided header has the expected/mandatory fields. |
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* |
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* @param ParameterBag|HeaderBag $header object representation of the request header. |
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* @param string $fieldName Name of the header field to be validated. |
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* |
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* @return void |
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* @throws \Symfony\Component\HttpKernel\Exception\HttpException |
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*/ |
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protected function validateField($header, $fieldName) |
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{ |
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$passed = $header->has($fieldName); |
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// return without exception so we can return a dummy user |
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if (true === $passed) { |
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// get rid of anything not a valid character |
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$authInfo = filter_var($header->get($fieldName), FILTER_SANITIZE_STRING); |
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// get rid of whitespaces |
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$patterns = array("\r\n", "\n", "\r", "\s", "\t"); |
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$authInfo = str_replace($patterns, "", trim($authInfo)); |
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// get rid of control characters |
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if (empty($authInfo) || $authInfo !== preg_replace('#[[:cntrl:]]#i', '', $authInfo)) { |
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throw new HttpException( |
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Response::HTTP_NETWORK_AUTHENTICATION_REQUIRED, |
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'Mandatory header field (' . $fieldName . ') not provided or invalid.' |
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); |
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} |
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} |
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} |
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/** |
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* Decider to stop other strategies running after from being considered. |
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* |
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* @return boolean |
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*/ |
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public function stopPropagation() { |
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return true; |
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} |
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} |
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libgraviton /
graviton
