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<?php |
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/** |
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* CakePHP(tm) : Rapid Development Framework (https://cakephp.org) |
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* Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org) |
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* |
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* Licensed under The MIT License |
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* For full copyright and license information, please see the LICENSE.txt |
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* Redistributions of files must retain the above copyright notice. |
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* |
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* @copyright Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org) |
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* @link https://cakephp.org CakePHP(tm) Project |
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* @since 1.0.0 |
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* @license https://opensource.org/licenses/mit-license.php MIT License |
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*/ |
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namespace Phauthentic\Authentication\Authenticator; |
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use ArrayObject; |
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use Phauthentic\Authentication\Identifier\IdentifierInterface; |
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use Exception; |
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use Firebase\JWT\JWT; |
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use Firebase\JWT\Key; |
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use Psr\Http\Message\ServerRequestInterface; |
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use stdClass; |
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/** |
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* Jwt Authenticator |
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*/ |
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class JwtAuthenticator extends TokenAuthenticator |
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{ |
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/** |
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* Query param |
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* |
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* @var null|string |
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*/ |
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protected ?string $queryParam = 'token'; |
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/** |
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* Header |
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* |
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* @var null|string |
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*/ |
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protected ?string $header = 'Authorization'; |
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/** |
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* Token Prefix |
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* |
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* @var null|string |
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*/ |
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protected ?string $tokenPrefix = 'bearer'; |
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/** |
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* Hashing algorithms |
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* |
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* @var array<int, string> |
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*/ |
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protected array $algorithms = [ |
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'HS256' |
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]; |
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/** |
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* Return payload |
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* |
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* @var bool |
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*/ |
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protected bool $returnPayload = true; |
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/** |
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* Secret key |
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* |
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* @var null|string |
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*/ |
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protected ?string $secretKey; |
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/** |
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* Payload data. |
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* |
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* @var object|null |
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*/ |
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protected ?object $payload = null; |
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/** |
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* {@inheritDoc} |
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*/ |
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public function __construct(IdentifierInterface $identifier, string $secretKey) |
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{ |
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parent::__construct($identifier); |
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$this->secretKey = $secretKey; |
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} |
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/** |
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* Sets algorithms to use |
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* |
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* @param array<int, string> $algorithms List of algorithms |
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* @return $this |
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*/ |
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public function setAlgorithms(array $algorithms): self |
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{ |
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$this->algorithms = $algorithms; |
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return $this; |
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} |
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/** |
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* Sets return payload. |
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* |
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* @param bool $return Return payload. |
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* @return $this |
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*/ |
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public function setReturnPayload(bool $return): self |
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{ |
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$this->returnPayload = $return; |
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return $this; |
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} |
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/** |
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* Sets secret key. |
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* |
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* @param string $key Secret key. |
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* @return $this |
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*/ |
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public function setSecretKey(string $key): self |
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{ |
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$this->secretKey = $key; |
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return $this; |
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} |
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/** |
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* Authenticates the identity based on a JWT token contained in a request. |
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* |
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* @link https://jwt.io/ |
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* @param \Psr\Http\Message\ServerRequestInterface $request The request that contains login information. |
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* @return \Phauthentic\Authentication\Authenticator\ResultInterface |
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*/ |
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public function authenticate(ServerRequestInterface $request): ResultInterface |
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{ |
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try { |
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$result = $this->getPayload($request); |
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} catch (Exception $e) { |
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return new Result( |
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null, |
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Result::FAILURE_CREDENTIALS_INVALID, |
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[ |
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'message' => $e->getMessage(), |
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'exception' => $e |
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] |
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); |
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} |
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if (!($result instanceof stdClass)) { |
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return new Result(null, Result::FAILURE_CREDENTIALS_INVALID); |
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} |
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$result = json_decode((string)json_encode($result), true); |
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$key = IdentifierInterface::CREDENTIAL_JWT_SUBJECT; |
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if (empty($result[$key])) { |
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return new Result(null, Result::FAILURE_CREDENTIALS_MISSING); |
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} |
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if ($this->returnPayload) { |
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$user = new ArrayObject($result); |
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return new Result($user, Result::SUCCESS); |
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} |
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$user = $this->identifier->identify([ |
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$key => $result[$key] |
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]); |
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if (empty($user)) { |
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return new Result(null, Result::FAILURE_IDENTITY_NOT_FOUND, $this->identifier->getErrors()); |
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} |
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return new Result($user, Result::SUCCESS); |
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} |
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/** |
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* Get payload data. |
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* |
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* @param \Psr\Http\Message\ServerRequestInterface|null $request Request to get authentication information from. |
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* @return object|null Payload object on success, null on failure |
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*/ |
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public function getPayload(ServerRequestInterface $request = null) |
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{ |
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if (!$request) { |
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return $this->payload; |
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} |
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$payload = null; |
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$token = $this->getToken($request); |
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if ($token !== null) { |
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$payload = $this->decodeToken($token); |
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} |
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$this->payload = $payload; |
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return $this->payload; |
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} |
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/** |
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* Decode JWT token. |
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* |
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* @param string $token JWT token to decode. |
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* @return object|null The JWT's payload as a PHP object, null on failure. |
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*/ |
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protected function decodeToken($token) |
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{ |
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return JWT::decode( |
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$token, |
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new Key((string)$this->secretKey, $this->algorithms[0]) |
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); |
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} |
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} |
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