93 lines
3 KiB
PHP
93 lines
3 KiB
PHP
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<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_InfoCard
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* @subpackage Zend_InfoCard_Xml
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id: Abstract.php 16214 2009-06-21 19:34:03Z thomas $
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*/
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/**
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* Zend_InfoCard_Xml_Element
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*/
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require_once 'Zend/InfoCard/Xml/Element.php';
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/**
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* Zend_InfoCard_Xml_KeyInfo
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*/
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require_once 'Zend/InfoCard/Xml/KeyInfo.php';
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/**
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* An abstract class representing a generic EncryptedData XML block. This class is extended
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* into a specific type of EncryptedData XML block (i.e. XmlEnc) as necessary
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*
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* @category Zend
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* @package Zend_InfoCard
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* @subpackage Zend_InfoCard_Xml
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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abstract class Zend_InfoCard_Xml_EncryptedData_Abstract extends Zend_InfoCard_Xml_Element
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{
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/**
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* Returns the KeyInfo Block
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*
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* @return Zend_InfoCard_Xml_KeyInfo_Abstract
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*/
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public function getKeyInfo()
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{
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return Zend_InfoCard_Xml_KeyInfo::getInstance($this->KeyInfo[0]);
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}
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/**
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* Return the Encryption method used to encrypt the assertion document
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* (the symmetric cipher)
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*
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* @throws Zend_InfoCard_Xml_Exception
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* @return string The URI of the Symmetric Encryption Method used
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*/
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public function getEncryptionMethod()
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{
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/**
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* @todo This is pretty hacky unless we can always be confident that the first
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* EncryptionMethod block is the correct one (the AES or compariable symetric algorithm)..
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* the second is the PK method if provided.
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*/
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list($encryption_method) = $this->xpath("//enc:EncryptionMethod");
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if(!($encryption_method instanceof Zend_InfoCard_Xml_Element)) {
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throw new Zend_InfoCard_Xml_Exception("Unable to find the enc:EncryptionMethod symmetric encryption block");
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}
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$dom = self::convertToDOM($encryption_method);
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if(!$dom->hasAttribute('Algorithm')) {
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throw new Zend_InfoCard_Xml_Exception("Unable to determine the encryption algorithm in the Symmetric enc:EncryptionMethod XML block");
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}
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return $dom->getAttribute('Algorithm');
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}
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/**
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* Returns the value of the encrypted block
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*
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* @return string the value of the encrypted CipherValue block
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*/
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abstract function getCipherValue();
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}
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