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<?php |
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declare(strict_types=1); |
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namespace PSR7Csrf; |
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use BadMethodCallException; |
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use InvalidArgumentException; |
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use Lcobucci\JWT\Parser; |
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use Lcobucci\JWT\Signer; |
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use Lcobucci\JWT\ValidationData; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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use Psr\Http\Server\RequestHandlerInterface; |
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use PSR7Csrf\Exception\SessionAttributeNotFoundException; |
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use PSR7Csrf\HttpMethod\IsSafeHttpRequestInterface; |
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use PSR7Csrf\RequestParameter\ExtractCSRFParameterInterface; |
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use PSR7Csrf\Session\ExtractUniqueKeyFromSessionInterface; |
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use PSR7Sessions\Storageless\Session\SessionInterface; |
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final class CSRFCheckerMiddleware implements \Psr\Http\Server\MiddlewareInterface |
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{ |
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/** |
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* @var Signer |
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*/ |
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private $signer; |
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/** |
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* @var Parser |
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*/ |
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private $tokenParser; |
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/** |
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* @var IsSafeHttpRequestInterface |
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*/ |
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private $isSafeHttpRequest; |
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/** |
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* @var ExtractUniqueKeyFromSessionInterface |
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*/ |
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private $extractUniqueKeyFromSession; |
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/** |
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* @var ExtractCSRFParameterInterface |
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*/ |
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private $extractCSRFParameter; |
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/** |
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* @var string |
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*/ |
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private $sessionAttribute; |
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/** |
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* @var ResponseInterface |
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*/ |
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private $faultyResponse; |
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public function __construct( |
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IsSafeHttpRequestInterface $isSafeHttpRequest, |
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ExtractUniqueKeyFromSessionInterface $extractUniqueKeyFromSession, |
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ExtractCSRFParameterInterface $extractCSRFParameter, |
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Parser $tokenParser, |
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Signer $signer, |
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string $sessionAttribute, |
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ResponseInterface $faultyResponse |
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) { |
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$this->isSafeHttpRequest = $isSafeHttpRequest; |
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$this->extractUniqueKeyFromSession = $extractUniqueKeyFromSession; |
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$this->extractCSRFParameter = $extractCSRFParameter; |
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$this->tokenParser = $tokenParser; |
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$this->signer = $signer; |
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$this->sessionAttribute = $sessionAttribute; |
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$this->faultyResponse = $faultyResponse; |
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} |
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2 |
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public function process( |
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ServerRequestInterface $request, |
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RequestHandlerInterface $handler |
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) : ResponseInterface { |
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if ($this->isSafeHttpRequest->__invoke($request)) { |
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return $handler->handle($request); |
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} |
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try { |
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$token = $this->tokenParser->parse($this->extractCSRFParameter->__invoke($request)); |
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if ($token->validate(new ValidationData()) |
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&& $token->verify( |
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$this->signer, |
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$this->extractUniqueKeyFromSession->__invoke($this->getSession($request)) |
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) |
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) { |
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return $handler->handle($request); |
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} |
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} catch (BadMethodCallException $invalidToken) { |
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return $this->faultyResponse; |
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} catch (InvalidArgumentException $invalidToken) { |
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return $this->faultyResponse; |
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} |
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return $this->faultyResponse; |
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} |
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private function getSession(ServerRequestInterface $request) : SessionInterface |
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{ |
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$session = $request->getAttribute($this->sessionAttribute); |
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if (! $session instanceof SessionInterface) { |
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throw SessionAttributeNotFoundException::fromAttributeNameAndRequest($this->sessionAttribute, $request); |
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} |
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return $session; |
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} |
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} |
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Ocramius /
PSR7Csrf
