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<?php |
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/** |
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* Nucleus - XMPP Library for PHP |
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* |
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* Copyright (C) 2016, Some rights reserved. |
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* |
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* @author Kacper "Kadet" Donat <[email protected]> |
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* |
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* Contact with author: |
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* Xmpp: [email protected] |
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* E-mail: [email protected] |
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* |
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* From Kadet with love. |
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*/ |
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namespace Kadet\Xmpp\Component; |
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use Kadet\Xmpp\Exception\Protocol\TlsException; |
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use Kadet\Xmpp\Network\SecureStream; |
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use Kadet\Xmpp\Stream\Features; |
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use Kadet\Xmpp\Utils\filter as with; |
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use Kadet\Xmpp\Xml\XmlElement; |
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use Kadet\Xmpp\XmppClient; |
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class TlsEnabler extends Component |
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{ |
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public function init() |
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{ |
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$this->_client->on('features', function (Features $features) { |
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return !$this->startTls($features); |
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}, null, 10); |
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$this->_client->on('element', function (XmlElement $element) { |
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return $this->handleTls($element); |
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}, with\element\xmlns(Features\StartTls::XMLNS)); |
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} |
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public function startTls(Features $features) |
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{ |
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if ($features->startTls) { |
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if ($this->_client->getDecorated() instanceof SecureStream) { |
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$this->_client->write(new Features\StartTls()); |
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return true; // Stop processing |
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} elseif ($features->startTls->required) { |
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throw new TlsException('Encryption is not available, but server requires it.'); |
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} |
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$this->_client->getLogger()->warning('Server offers TLS encryption, but stream is not capable of it.'); |
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} |
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return false; |
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} |
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private function handleTls(XmlElement $response) |
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{ |
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if ($response->localName !== 'proceed') { |
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throw new TlsException('TLS negotiation failed.'); // XMPP does not provide any useful information why it happened |
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} |
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// this function is called only by event, which can be only fired after instanceof check |
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/** @noinspection PhpUndefinedMethodInspection */ |
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$this->_client->getDecorated()->encrypt(STREAM_CRYPTO_METHOD_TLS_CLIENT); |
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$this->_client->restart(); |
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$this->_client->state = 'secured'; |
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} |
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} |
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kadet1090 /
nucleus
