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<?php |
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namespace League\OAuth2\Server; |
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use Exception; |
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use Lcobucci\JWT\Signer\Keychain; |
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use Lcobucci\JWT\Signer\Rsa\Sha256; |
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use Lcobucci\JWT\Token; |
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use Lcobucci\JWT\ValidationData; |
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use League\OAuth2\Server\CryptKey; |
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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\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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use Lcobucci\JWT\Parser; |
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use League\OAuth2\Server\ResponseTypes\IntrospectionResponse; |
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class Introspector |
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{ |
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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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private $privateKey; |
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/** |
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* @var Parser |
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*/ |
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private $parser; |
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/** |
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* New Introspector instance. |
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* |
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* @param AccessTokenRepositoryInterface $accessTokenRepository |
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* @param CryptKey $privateKey |
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* @param Parser $parser |
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*/ |
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public function __construct( |
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AccessTokenRepositoryInterface $accessTokenRepository, |
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CryptKey $privateKey, |
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Parser $parser |
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) |
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{ |
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$this->accessTokenRepository = $accessTokenRepository; |
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$this->privateKey = $privateKey; |
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$this->parser = $parser; |
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} |
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/** |
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* Return an introspection response. |
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* |
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* @param ServerRequestInterface $request |
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* |
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* @return IntrospectionResponse |
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*/ |
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public function respondToIntrospectionRequest(ServerRequestInterface $request) |
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{ |
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$jwt = $request->getParsedBody()['token'] ?? null; |
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try { |
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$token = $this->parser->parse($jwt); |
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$this->verifyToken($token); |
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$this->checkIfTokenIsExpired($token); |
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$this->checkIfTokenIsRevoked($token); |
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return $this->createActiveResponse($token); |
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} |
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catch(Exception $ex) { |
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return $this->createInactiveResponse(); |
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} |
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} |
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/** |
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* Validate the JWT token. |
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* |
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* @param Token $token |
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* |
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* @throws OAuthServerException |
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*/ |
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private function verifyToken(Token $token) |
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{ |
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$keychain = new Keychain(); |
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$key = $keychain->getPrivateKey($this->privateKey->getKeyPath(), $this->privateKey->getPassPhrase()); |
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if (!$token->verify(new Sha256, $key)) { |
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throw OAuthServerException::accessDenied('Access token could not be verified'); |
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} |
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} |
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/** |
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* Ensure access token hasn't expired |
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* |
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* @param Token $token |
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* |
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* @throws OAuthServerException |
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*/ |
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private function checkIfTokenIsExpired(Token $token) |
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{ |
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$data = new ValidationData(time()); |
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if (!$token->validate($data)) { |
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throw OAuthServerException::accessDenied('Access token is invalid'); |
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} |
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} |
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/** |
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* Check if the given access token is revoked. |
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* |
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* @param Token $token |
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* |
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* @throws OAuthServerException |
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*/ |
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private function checkIfTokenIsRevoked(Token $token) |
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{ |
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if ($this->accessTokenRepository->isAccessTokenRevoked($token->getClaim('jti'))) { |
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throw OAuthServerException::accessDenied('Access token has been revoked'); |
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} |
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} |
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/** |
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* Create active introspection response. |
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* |
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* @param Token $token |
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* |
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* @return IntrospectionResponse |
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*/ |
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private function createActiveResponse(Token $token) |
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{ |
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$response = new IntrospectionResponse(); |
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$response->setIntrospectionData( |
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[ |
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'active' => true, |
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'token_type' => 'access_token', |
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'scope' => $token->getClaim('scopes', ''), |
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'client_id' => $token->getClaim('aud'), |
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'exp' => $token->getClaim('exp'), |
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'iat' => $token->getClaim('iat'), |
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'sub' => $token->getClaim('sub'), |
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'jti' => $token->getClaim('jti'), |
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] |
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); |
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return $response; |
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} |
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/** |
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* Create inactive introspection response |
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* |
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* @return IntrospectionResponse |
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*/ |
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private function createInactiveResponse() |
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{ |
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$response = new IntrospectionResponse(); |
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$response->setIntrospectionData( |
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[ |
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'active' => false, |
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] |
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); |
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return $response; |
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} |
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} |
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thephpleague /
oauth2-server
