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<?php |
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declare(strict_types=1); |
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/* |
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* The MIT License (MIT) |
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* |
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* Copyright (c) 2014-2018 Spomky-Labs |
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* |
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* This software may be modified and distributed under the terms |
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* of the MIT license. See the LICENSE file for details. |
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*/ |
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namespace OAuth2Framework\Component\Server\MetadataEndpoint; |
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use Http\Message\ResponseFactory; |
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use Interop\Http\Server\RequestHandlerInterface; |
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use Interop\Http\Server\MiddlewareInterface; |
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use Jose\Component\Core\Converter\StandardConverter; |
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use Jose\Component\Core\JWK; |
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use Jose\Component\Signature\JWSBuilder; |
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use Jose\Component\Signature\Serializer\CompactSerializer; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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final class MetadataEndpoint implements MiddlewareInterface |
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{ |
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/** |
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* @var ResponseFactory |
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*/ |
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private $responseFactory; |
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/** |
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* @var Metadata |
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*/ |
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private $metadata; |
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/** |
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* @var null|JWK |
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*/ |
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private $signatureKey = null; |
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/** |
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* @var null|string |
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*/ |
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private $signatureAlgorithm = null; |
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/** |
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* @var null|JWSBuilder |
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*/ |
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private $jwsBuilder = null; |
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/** |
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* MetadataEndpoint constructor. |
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* |
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* @param ResponseFactory $responseFactory |
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* @param Metadata $metadata |
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*/ |
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public function __construct(ResponseFactory $responseFactory, Metadata $metadata) |
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{ |
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$this->responseFactory = $responseFactory; |
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$this->metadata = $metadata; |
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} |
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/** |
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* @param JWSBuilder $jwsBuilder |
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* @param JWK $signatureKey |
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* @param string $signatureAlgorithm |
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*/ |
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public function enableSignature(JWSBuilder $jwsBuilder, string $signatureAlgorithm, JWK $signatureKey) |
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{ |
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$this->jwsBuilder = $jwsBuilder; |
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$this->signatureKey = $signatureKey; |
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$this->signatureAlgorithm = $signatureAlgorithm; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface |
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{ |
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$data = $this->metadata->jsonSerialize(); |
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if (null !== $this->jwsBuilder) { |
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$data['signed_metadata'] = $this->sign($data); |
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} |
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$response = $this->responseFactory->createResponse(); |
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$response->getBody()->write(json_encode($data, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES)); |
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$response = $response->withHeader('Content-Type', 'application/json; charset=UTF-8'); |
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return $response; |
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} |
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/** |
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* @param array $metadata |
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* |
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* @return string |
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*/ |
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private function sign(array $metadata): string |
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{ |
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$jsonConverter = new StandardConverter(); |
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$header = [ |
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'alg' => $this->signatureAlgorithm, |
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]; |
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$jws = $this->jwsBuilder |
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->create() |
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->withPayload($jsonConverter->encode($metadata)) |
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->addSignature($this->signatureKey, $header) |
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->build(); |
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$serializer = new CompactSerializer($jsonConverter); |
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$assertion = $serializer->serialize($jws, 0); |
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return $assertion; |
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} |
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} |
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OAuth2-Framework /
oauth2-framework
