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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_InfoCard
* @subpackage Zend_InfoCard_Xml
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Abstract.php 20096 2010-01-06 02:05:09Z bkarwin $
*/
/**
* Zend_InfoCard_Xml_Element
*/
require_once 'Zend/InfoCard/Xml/Element.php';
/**
* Zend_InfoCard_Xml_KeyInfo
*/
require_once 'Zend/InfoCard/Xml/KeyInfo.php';
/**
* An abstract class representing a generic EncryptedData XML block. This class is extended
* into a specific type of EncryptedData XML block (i.e. XmlEnc) as necessary
*
* @category Zend
* @package Zend_InfoCard
* @subpackage Zend_InfoCard_Xml
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
abstract class Zend_InfoCard_Xml_EncryptedData_Abstract extends Zend_InfoCard_Xml_Element
{
/**
* Returns the KeyInfo Block
*
* @return Zend_InfoCard_Xml_KeyInfo_Abstract
*/
public function getKeyInfo()
{
return Zend_InfoCard_Xml_KeyInfo::getInstance($this->KeyInfo[0]);
}
/**
* Return the Encryption method used to encrypt the assertion document
* (the symmetric cipher)
*
* @throws Zend_InfoCard_Xml_Exception
* @return string The URI of the Symmetric Encryption Method used
*/
public function getEncryptionMethod()
{
/**
* @todo This is pretty hacky unless we can always be confident that the first
* EncryptionMethod block is the correct one (the AES or compariable symetric algorithm)..
* the second is the PK method if provided.
*/
list($encryption_method) = $this->xpath("//enc:EncryptionMethod");
if(!($encryption_method instanceof Zend_InfoCard_Xml_Element)) {
throw new Zend_InfoCard_Xml_Exception("Unable to find the enc:EncryptionMethod symmetric encryption block");
}
$dom = self::convertToDOM($encryption_method);
if(!$dom->hasAttribute('Algorithm')) {
throw new Zend_InfoCard_Xml_Exception("Unable to determine the encryption algorithm in the Symmetric enc:EncryptionMethod XML block");
}
return $dom->getAttribute('Algorithm');
}
/**
* Returns the value of the encrypted block
*
* @return string the value of the encrypted CipherValue block
*/
abstract function getCipherValue();
}
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