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<?php |
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declare(strict_types=1); |
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namespace SimpleSAML\SAML2\Binding; |
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use Exception; |
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use Nyholm\Psr7\Response; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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use SimpleSAML\Assert\Assert; |
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use SimpleSAML\SAML2\Binding; |
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use SimpleSAML\SAML2\Binding\RelayStateTrait; |
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use SimpleSAML\SAML2\Exception\ProtocolViolationException; |
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use SimpleSAML\SAML2\Utils; |
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use SimpleSAML\SAML2\XML\samlp\AbstractMessage; |
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use SimpleSAML\SAML2\XML\samlp\AbstractRequest; |
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use SimpleSAML\SAML2\XML\samlp\MessageFactory; |
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use SimpleSAML\XML\DOMDocumentFactory; |
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use function array_key_exists; |
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use function base64_decode; |
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use function base64_encode; |
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/** |
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* Class which implements the HTTP-POST binding. |
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* |
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* @package simplesamlphp/saml2 |
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*/ |
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class HTTPPost extends Binding implements AsynchronousBindingInterface, RelayStateInterface |
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{ |
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use RelayStateTrait; |
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/** |
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* Send a SAML 2 message using the HTTP-POST binding. |
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* |
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* @param \SimpleSAML\SAML2\XML\samlp\AbstractMessage $message The message we should send. |
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* @return \Psr\Http\Message\ResponseInterface The response |
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*/ |
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public function send(AbstractMessage $message): ResponseInterface |
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{ |
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if ($this->destination === null) { |
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$destination = $message->getDestination(); |
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if ($destination === null) { |
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throw new Exception('Cannot send message, no destination set.'); |
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} |
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} else { |
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$destination = $this->destination; |
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} |
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$relayState = $this->getRelayState(); |
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$msgStr = $message->toXML(); |
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Utils::getContainer()->debugMessage($msgStr, 'out'); |
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$msgStr = $msgStr->ownerDocument?->saveXML($msgStr); |
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$msgStr = base64_encode($msgStr); |
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if ($message instanceof AbstractRequest) { |
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$msgType = 'SAMLRequest'; |
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} else { |
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$msgType = 'SAMLResponse'; |
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} |
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$post = []; |
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$post[$msgType] = $msgStr; |
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if ($relayState !== null) { |
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$post['RelayState'] = $relayState; |
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} |
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$container = Utils::getContainer(); |
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return new Response(303, ['Location' => $container->getPOSTRedirectURL($destination, $post)]); |
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} |
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/** |
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* Receive a SAML 2 message sent using the HTTP-POST binding. |
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* |
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* Throws an exception if it is unable receive the message. |
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* |
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* @param \Psr\Http\Message\ServerRequestInterface $request |
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* @return \SimpleSAML\SAML2\XML\samlp\AbstractMessage The received message. |
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* @throws \Exception |
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*/ |
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public function receive(ServerRequestInterface $request): AbstractMessage |
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{ |
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$query = $request->getParsedBody(); |
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if (array_key_exists('SAMLRequest', $query)) { |
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$msgStr = $query['SAMLRequest']; |
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} elseif (array_key_exists('SAMLResponse', $query)) { |
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$msgStr = $query['SAMLResponse']; |
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} else { |
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throw new Exception('Missing SAMLRequest or SAMLResponse parameter.'); |
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} |
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$msgStr = base64_decode($msgStr, true); |
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$msgStr = DOMDocumentFactory::fromString($msgStr)->saveXML(); |
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$document = DOMDocumentFactory::fromString($msgStr); |
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Utils::getContainer()->debugMessage($document->documentElement, 'in'); |
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$msg = MessageFactory::fromXML($document->documentElement); |
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/** |
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* 3.5.5.2 - SAML Bindings |
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* |
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* If the message is signed, the Destination XML attribute in the root SAML element of the protocol |
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* message MUST contain the URL to which the sender has instructed the user agent to deliver the |
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* message. |
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*/ |
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if ($msg->isSigned()) { |
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Assert::notNull($msg->getDestination(), ProtocolViolationException::class); |
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// Validation of the Destination must be done upstream |
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} |
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if (array_key_exists('RelayState', $query)) { |
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$this->setRelayState($query['RelayState']); |
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} |
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return $msg; |
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} |
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} |
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simplesamlphp /
saml2
