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<?php |
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/** |
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* @author Alex Bilbie <[email protected]> |
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* @copyright Copyright (c) Alex Bilbie |
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* @license http://mit-license.org/ |
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* |
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* @link https://github.com/thephpleague/oauth2-server |
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*/ |
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namespace League\OAuth2\Server\AuthorizationValidators; |
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use DateTimeZone; |
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use Lcobucci\Clock\SystemClock; |
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use Lcobucci\JWT\Configuration; |
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use Lcobucci\JWT\Signer\Key\InMemory; |
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use Lcobucci\JWT\Signer\Key\LocalFileReference; |
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use Lcobucci\JWT\Signer\Rsa\Sha256; |
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use Lcobucci\JWT\Validation\Constraint\SignedWith; |
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use Lcobucci\JWT\Validation\Constraint\ValidAt; |
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use Lcobucci\JWT\Validation\RequiredConstraintsViolated; |
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use League\OAuth2\Server\CryptKey; |
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use League\OAuth2\Server\CryptTrait; |
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use League\OAuth2\Server\Exception\OAuthServerException; |
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use League\OAuth2\Server\Repositories\AccessTokenRepositoryInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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class BearerTokenValidator implements AuthorizationValidatorInterface |
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{ |
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use CryptTrait; |
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/** |
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* @var AccessTokenRepositoryInterface |
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*/ |
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private $accessTokenRepository; |
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/** |
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* @var CryptKey |
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*/ |
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protected $publicKey; |
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/** |
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* @var Configuration |
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*/ |
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private $jwtConfiguration; |
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/** |
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* @param AccessTokenRepositoryInterface $accessTokenRepository |
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*/ |
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public function __construct(AccessTokenRepositoryInterface $accessTokenRepository) |
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{ |
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$this->accessTokenRepository = $accessTokenRepository; |
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} |
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/** |
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* Set the public key |
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* |
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* @param CryptKey $key |
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*/ |
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public function setPublicKey(CryptKey $key) |
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{ |
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$this->publicKey = $key; |
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$this->initJwtConfiguration(); |
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} |
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/** |
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* Initialise the JWT configuration. |
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*/ |
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private function initJwtConfiguration() |
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{ |
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$this->jwtConfiguration = Configuration::forSymmetricSigner( |
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new Sha256(), |
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InMemory::plainText('') |
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); |
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$this->jwtConfiguration->setValidationConstraints( |
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new ValidAt(new SystemClock(new DateTimeZone(\date_default_timezone_get()))), |
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new SignedWith(new Sha256(), LocalFileReference::file($this->publicKey->getKeyPath())) |
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); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function validateAuthorization(ServerRequestInterface $request) |
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{ |
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if ($request->hasHeader('authorization') === false) { |
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throw OAuthServerException::accessDenied('Missing "Authorization" header'); |
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} |
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$header = $request->getHeader('authorization'); |
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$jwt = \trim((string) \preg_replace('/^(?:\s+)?Bearer\s/', '', $header[0])); |
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try { |
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// Attempt to parse the JWT |
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$token = $this->jwtConfiguration->parser()->parse($jwt); |
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} catch (\Lcobucci\JWT\Exception $exception) { |
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throw OAuthServerException::accessDenied($exception->getMessage(), null, $exception); |
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} |
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try { |
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// Attempt to validate the JWT |
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$constraints = $this->jwtConfiguration->validationConstraints(); |
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$this->jwtConfiguration->validator()->assert($token, ...$constraints); |
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} catch (RequiredConstraintsViolated $exception) { |
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throw OAuthServerException::accessDenied('Access token could not be verified'); |
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} |
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$claims = $token->claims(); |
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// Check if token has been revoked |
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if ($this->accessTokenRepository->isAccessTokenRevoked($claims->get('jti'))) { |
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throw OAuthServerException::accessDenied('Access token has been revoked'); |
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} |
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// Return the request with additional attributes |
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return $request |
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->withAttribute('oauth_access_token_id', $claims->get('jti')) |
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->withAttribute('oauth_client_id', $this->convertSingleRecordAudToString($claims->get('aud'))) |
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->withAttribute('oauth_user_id', $claims->get('sub')) |
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->withAttribute('oauth_scopes', $claims->get('scopes')) |
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->withAttribute('oauth_custom_claims', $this->extractCustomClaims($claims->all())); |
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} |
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/** |
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* Convert single record arrays into strings to ensure backwards compatibility between v4 and v3.x of lcobucci/jwt |
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* |
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* @param mixed $aud |
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* |
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* @return array|string |
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*/ |
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private function convertSingleRecordAudToString($aud) |
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{ |
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return \is_array($aud) && \count($aud) === 1 ? $aud[0] : $aud; |
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} |
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/** |
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* Extract custom claims |
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* |
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* @param array $claims |
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* |
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* @return array |
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*/ |
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private function extractCustomClaims($claims) |
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{ |
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return \array_diff_key($claims, \array_flip(['jti', 'aud', 'sub', 'scopes', 'iat', 'nbf', 'exp'])); |
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} |
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} |
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thephpleague /
oauth2-server
