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<?php |
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declare(strict_types=1); |
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namespace lepiaf\SapientBundle\EventSubscriber; |
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use lepiaf\SapientBundle\Exception\VerifySignatureException; |
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use lepiaf\SapientBundle\Service\PublicKeyGetter; |
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use ParagonIE\ConstantTime\Base64UrlSafe; |
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use ParagonIE\Sapient\CryptographyKeys\SigningPublicKey; |
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use ParagonIE\Sapient\Sapient; |
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use Symfony\Bridge\PsrHttpMessage\Factory\DiactorosFactory; |
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use Symfony\Component\EventDispatcher\EventSubscriberInterface; |
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use Symfony\Component\HttpFoundation\Request; |
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use Symfony\Component\HttpKernel\Event\GetResponseEvent; |
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use Symfony\Component\HttpKernel\KernelEvents; |
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class VerifyRequestSubscriber implements EventSubscriberInterface |
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{ |
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/** |
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* @var PublicKeyGetter |
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*/ |
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private $publicKeyGetter; |
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/** |
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* @var Sapient |
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*/ |
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private $sapient; |
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/** |
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* @var DiactorosFactory |
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*/ |
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private $diactorosFactory; |
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public function __construct(DiactorosFactory $diactorosFactory, Sapient $sapient, PublicKeyGetter $publicKeyGetter) |
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{ |
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$this->diactorosFactory = $diactorosFactory; |
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$this->sapient = $sapient; |
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$this->publicKeyGetter = $publicKeyGetter; |
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} |
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public static function getSubscribedEvents() |
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{ |
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return [ |
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KernelEvents::REQUEST => ['verifyRequest', -110], |
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]; |
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} |
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public function verifyRequest(GetResponseEvent $event): void |
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{ |
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$publicKey = $this->getVerifyingKey($event->getRequest()); |
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$psrRequest = $this->diactorosFactory->createRequest($event->getRequest()); |
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try { |
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$this->sapient->verifySignedRequest( |
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$psrRequest, |
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new SigningPublicKey(Base64UrlSafe::decode($publicKey)) |
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); |
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} catch (\SodiumException $sodiumException) { |
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throw new VerifySignatureException('Cannot verify signature in request.'); |
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} |
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} |
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private function getVerifyingKey(Request $request): string |
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{ |
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$psrRequest = $this->diactorosFactory->createRequest($request); |
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return $this->publicKeyGetter->getVerifyingKeyFromRequest($psrRequest); |
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} |
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} |
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lepiaf /
sapient-bundle
