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<?php |
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declare(strict_types=1); |
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namespace SAML2; |
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use RobRichards\XMLSecLibs\XMLSecEnc; |
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use RobRichards\XMLSecLibs\XMLSecurityKey; |
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/** |
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* Class handling encrypted assertions. |
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* |
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* @package SimpleSAMLphp |
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*/ |
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class EncryptedAssertion |
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{ |
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/** |
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* The current encrypted assertion. |
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* |
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* @var \DOMElement |
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*/ |
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private $encryptedData; |
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/** |
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* @var bool |
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*/ |
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protected $wasSignedAtConstruction = false; |
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/** |
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* Constructor for SAML 2 encrypted assertions. |
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* |
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* @param \DOMElement|null $xml The encrypted assertion XML element. |
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* @throws \Exception |
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*/ |
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public function __construct(\DOMElement $xml = null) |
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{ |
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if ($xml === null) { |
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return; |
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} |
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/** @var \DOMElement[] $data */ |
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$data = Utils::xpQuery($xml, './xenc:EncryptedData'); |
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if (empty($data)) { |
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throw new \Exception('Missing encrypted data in <saml:EncryptedAssertion>.'); |
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} elseif (count($data) > 1) { |
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throw new \Exception('More than one encrypted data element in <saml:EncryptedAssertion>.'); |
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} |
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$this->encryptedData = $data[0]; |
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} |
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/** |
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* @return bool |
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*/ |
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public function wasSignedAtConstruction() |
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{ |
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return $this->wasSignedAtConstruction; |
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} |
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/** |
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* Set the assertion. |
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* |
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* @param \SAML2\Assertion $assertion The assertion. |
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* @param XMLSecurityKey $key The key we should use to encrypt the assertion. |
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* @throws \Exception |
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* @return void |
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*/ |
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public function setAssertion(Assertion $assertion, XMLSecurityKey $key) |
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{ |
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$xml = $assertion->toXML(); |
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Utils::getContainer()->debugMessage($xml, 'encrypt'); |
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$enc = new XMLSecEnc(); |
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$enc->setNode($xml); |
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$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 = $key; |
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break; |
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case XMLSecurityKey::RSA_1_5: |
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case XMLSecurityKey::RSA_OAEP_MGF1P: |
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$symmetricKey = new XMLSecurityKey(XMLSecurityKey::AES128_CBC); |
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$symmetricKey->generateSessionKey(); |
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$enc->encryptKey($key, $symmetricKey); |
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break; |
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default: |
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throw new \Exception('Unknown key type for encryption: '.$key->type); |
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} |
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/** @var \DOMElement encryptedData */ |
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$this->encryptedData = $enc->encryptNode($symmetricKey); |
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} |
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/** |
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* Retrieve the assertion. |
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* |
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* @param XMLSecurityKey $inputKey The key we should use to decrypt the assertion. |
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* @param array $blacklist Blacklisted decryption algorithms. |
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* @return \SAML2\Assertion The decrypted assertion. |
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*/ |
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public function getAssertion(XMLSecurityKey $inputKey, array $blacklist = []) : Assertion |
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{ |
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$assertionXML = Utils::decryptElement($this->encryptedData, $inputKey, $blacklist); |
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Utils::getContainer()->debugMessage($assertionXML, 'decrypt'); |
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return new Assertion($assertionXML); |
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} |
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/** |
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* Convert this encrypted assertion to an XML element. |
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* |
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* @param \DOMNode|null $parentElement The DOM node the assertion should be created in. |
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* @return \DOMElement This encrypted assertion. |
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*/ |
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public function toXML(\DOMNode $parentElement = null) : \DOMElement |
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{ |
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if ($parentElement === null) { |
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$document = DOMDocumentFactory::create(); |
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$parentElement = $document; |
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} else { |
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$document = $parentElement->ownerDocument; |
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} |
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$root = $document->createElementNS(Constants::NS_SAML, 'saml:'.'EncryptedAssertion'); |
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$parentElement->appendChild($root); |
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$root->appendChild($document->importNode($this->encryptedData, true)); |
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return $root; |
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} |
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} |
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simplesamlphp /
saml2
