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<?php declare(strict_types=1); |
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/** |
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* This file is part of the daikon-cqrs/security-interop project. |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Daikon\Security\Middleware; |
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use Daikon\Config\ConfigProviderInterface; |
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use Firebase\JWT\JWT; |
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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\MiddlewareInterface; |
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use Psr\Http\Server\RequestHandlerInterface; |
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use UnexpectedValueException; |
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final class JwtDecoder implements MiddlewareInterface |
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{ |
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public const DEFAULT_ATTR_JWT = '__Host-_jwt'; |
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public const DEFAULT_ATTR_XSRF = '__Host-_xsrf'; |
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public const DEFAULT_HEADER_XSRF = 'X-XSRF-TOKEN'; |
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private ConfigProviderInterface $config; |
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public function __construct(ConfigProviderInterface $config) |
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{ |
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$this->config = $config; |
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} |
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public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface |
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{ |
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$authConfig = $this->config->get('project.authentication', []); |
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$jwtAttribute = $authConfig['jwt']['attribute'] ?? self::DEFAULT_ATTR_JWT; |
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$xsrfAttribute = $authConfig['xsrf']['attribute'] ?? self::DEFAULT_ATTR_XSRF; |
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$xsrfHeader = $authConfig['xsrf']['header'] ?? self::DEFAULT_HEADER_XSRF; |
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$cookieParams = $request->getCookieParams(); |
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$encodedJwt = $cookieParams[$jwtAttribute] ?? $this->parseAuthHeader($request->getHeaderLine('Authorization')); |
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$xsrfToken = $cookieParams[$xsrfAttribute] ?? $request->getHeaderLine($xsrfHeader); |
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$decodedJwt = null; |
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if ($encodedJwt) { |
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$decodedJwt = $this->decodeJwt($encodedJwt); |
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} |
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return $handler->handle( |
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$request->withAttribute($jwtAttribute, $decodedJwt)->withAttribute($xsrfAttribute, $xsrfToken) |
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); |
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} |
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private function decodeJwt(string $jwt): ?object |
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{ |
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$secretKey = $this->config->get('project.authentication.jwt.secret', 'daikon'); |
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try { |
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return JWT::decode($jwt, $secretKey, ['HS256']); |
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} catch (UnexpectedValueException $error) { |
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return null; |
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} |
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} |
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private function parseAuthHeader(string $header): ?string |
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{ |
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return preg_match('/^Bearer\s+(?<token>[a-z0-9\._-]+)$/i', $header, $matches) |
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? $matches['token'] |
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: null; |
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} |
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} |
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daikon-cqrs /
security-interop
