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<?php |
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/* |
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* This file is part of the LightSAML-Core package. |
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* |
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* (c) Milos Tomic <[email protected]> |
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* |
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* This source file is subject to the MIT license that is bundled |
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* with this source code in the file LICENSE. |
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*/ |
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namespace LightSaml\Model\Assertion; |
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use LightSaml\Model\Context\DeserializationContext; |
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use LightSaml\Model\Context\SerializationContext; |
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use LightSaml\Error\LightSamlException; |
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use LightSaml\Model\AbstractSamlModel; |
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use RobRichards\XMLSecLibs\XMLSecurityKey; |
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use RobRichards\XMLSecLibs\XMLSecEnc; |
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abstract class EncryptedElementWriter extends EncryptedElement |
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{ |
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/** @var \DOMElement */ |
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protected $encryptedElement; |
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/** @var string */ |
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protected $blockEncryptionAlgorithm = XMLSecurityKey::AES128_CBC; |
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/** @var string */ |
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protected $keyTransportEncryption = XMLSecurityKey::RSA_1_5; |
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/** |
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* @param string $blockEncryptionAlgorithm |
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* @param string $keyTransportEncryption |
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*/ |
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public function __construct($blockEncryptionAlgorithm = XMLSecurityKey::AES128_CBC, $keyTransportEncryption = XMLSecurityKey::RSA_1_5) |
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{ |
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$this->blockEncryptionAlgorithm = $blockEncryptionAlgorithm; |
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$this->keyTransportEncryption = $keyTransportEncryption; |
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} |
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/** |
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* @param AbstractSamlModel $object |
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* @param XMLSecurityKey $key |
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* |
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* @return SerializationContext |
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*/ |
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public function encrypt(AbstractSamlModel $object, XMLSecurityKey $key) |
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{ |
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$oldKey = $key; |
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$key = new XMLSecurityKey($this->keyTransportEncryption, ['type' => 'public']); |
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$key->loadKey($oldKey->key); |
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$serializationContext = new SerializationContext(); |
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$object->serialize($serializationContext->getDocument(), $serializationContext); |
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$enc = new XMLSecEnc(); |
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$enc->setNode($serializationContext->getDocument()->firstChild); |
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$enc->type = XMLSecEnc::Element; |
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switch ($key->type) { |
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case XMLSecurityKey::TRIPLEDES_CBC: |
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case XMLSecurityKey::AES128_CBC: |
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case XMLSecurityKey::AES192_CBC: |
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case XMLSecurityKey::AES256_CBC: |
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$symmetricKey = $key; |
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break; |
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case XMLSecurityKey::RSA_1_5: |
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case XMLSecurityKey::RSA_SHA1: |
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case XMLSecurityKey::RSA_SHA256: |
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case XMLSecurityKey::RSA_SHA384: |
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case XMLSecurityKey::RSA_SHA512: |
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case XMLSecurityKey::RSA_OAEP_MGF1P: |
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$symmetricKey = new XMLSecurityKey($this->blockEncryptionAlgorithm); |
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$symmetricKey->generateSessionKey(); |
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$enc->encryptKey($key, $symmetricKey); |
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break; |
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default: |
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throw new LightSamlException(sprintf('Unknown key type for encryption: "%s"', $key->type)); |
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} |
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$this->encryptedElement = $enc->encryptNode($symmetricKey); |
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return $serializationContext; |
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} |
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/** |
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* @param \DOMNode $parent |
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* @param SerializationContext $context |
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* |
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* @return \DOMElement |
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*/ |
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abstract protected function createRootElement(\DOMNode $parent, SerializationContext $context); |
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/** |
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* @param \DOMNode $parent |
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* @param SerializationContext $context |
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* |
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* @return void |
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*/ |
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public function serialize(\DOMNode $parent, SerializationContext $context) |
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{ |
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if (null === $this->encryptedElement) { |
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throw new LightSamlException('Encrypted element missing'); |
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} |
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$root = $this->createRootElement($parent, $context); |
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$root->appendChild($context->getDocument()->importNode($this->encryptedElement, true)); |
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} |
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/** |
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* @param \DOMNode $node |
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* @param DeserializationContext $context |
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*/ |
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public function deserialize(\DOMNode $node, DeserializationContext $context) |
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{ |
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throw new \LogicException('EncryptedElementWriter can not be used for deserialization'); |
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} |
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} |
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thephplab /
lightsaml
