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<?php |
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namespace SAML2\XML\md; |
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use SAML2\Constants; |
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use SAML2\Utils; |
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use SAML2\XML\Chunk; |
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use SAML2\XML\ds\KeyInfo; |
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/** |
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* Class representing a KeyDescriptor element. |
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* |
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* @package SimpleSAMLphp |
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*/ |
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class KeyDescriptor |
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{ |
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/** |
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* What this key can be used for. |
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* |
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* 'encryption', 'signing' or null. |
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* |
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* @var string|null |
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*/ |
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public $use; |
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/** |
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* The KeyInfo for this key. |
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* |
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* @var \SAML2\XML\ds\KeyInfo |
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*/ |
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public $KeyInfo; |
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/** |
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* Supported EncryptionMethods. |
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* |
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* Array of \SAML2\XML\Chunk objects. |
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* |
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* @var \SAML2\XML\Chunk[] |
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*/ |
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public $EncryptionMethod = array(); |
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/** |
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* Initialize an KeyDescriptor. |
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* |
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* @param \DOMElement|null $xml The XML element we should load. |
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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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if ($xml->hasAttribute('use')) { |
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$this->use = $xml->getAttribute('use'); |
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} |
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$keyInfo = Utils::xpQuery($xml, './ds:KeyInfo'); |
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if (count($keyInfo) > 1) { |
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throw new \Exception('More than one ds:KeyInfo in the KeyDescriptor.'); |
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} elseif (empty($keyInfo)) { |
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throw new \Exception('No ds:KeyInfo in the KeyDescriptor.'); |
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} |
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$this->KeyInfo = new KeyInfo($keyInfo[0]); |
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foreach (Utils::xpQuery($xml, './saml_metadata:EncryptionMethod') as $em) { |
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$this->EncryptionMethod[] = new Chunk($em); |
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} |
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} |
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/** |
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* Convert this KeyDescriptor to XML. |
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* |
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* @param \DOMElement $parent The element we should append this KeyDescriptor to. |
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* @return \DOMElement |
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*/ |
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public function toXML(\DOMElement $parent) |
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{ |
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assert(is_null($this->use) || is_string($this->use)); |
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assert($this->KeyInfo instanceof KeyInfo); |
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assert(is_array($this->EncryptionMethod)); |
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$doc = $parent->ownerDocument; |
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$e = $doc->createElementNS(Constants::NS_MD, 'md:KeyDescriptor'); |
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$parent->appendChild($e); |
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if (isset($this->use)) { |
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$e->setAttribute('use', $this->use); |
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} |
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$this->KeyInfo->toXML($e); |
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foreach ($this->EncryptionMethod as $em) { |
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$em->toXML($e); |
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} |
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return $e; |
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} |
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} |
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simplesamlphp /
saml2
