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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: EncryptedKey.php 20096 2010-01-06 02:05:09Z bkarwin $
*/
/**
* Zend_InfoCard_Xml_Element
*/
require_once 'Zend/InfoCard/Xml/Element.php';
/**
* Zend_InfoCard_Xml_EncryptedKey
*/
require_once 'Zend/InfoCard/Xml/EncryptedKey.php';
/**
* Zend_InfoCard_Xml_KeyInfo_Interface
*/
require_once 'Zend/InfoCard/Xml/KeyInfo/Interface.php';
/**
* An object representing an Xml EncryptedKEy block
*
* @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
*/
class Zend_InfoCard_Xml_EncryptedKey
extends Zend_InfoCard_Xml_Element
implements Zend_InfoCard_Xml_KeyInfo_Interface
{
/**
* Return an instance of the object based on input XML Data
*
* @throws Zend_InfoCard_Xml_Exception
* @param string $xmlData The EncryptedKey XML Block
* @return Zend_InfoCard_Xml_EncryptedKey
*/
static public function getInstance($xmlData)
{
if($xmlData instanceof Zend_InfoCard_Xml_Element) {
$strXmlData = $xmlData->asXML();
} else if (is_string($xmlData)) {
$strXmlData = $xmlData;
} else {
throw new Zend_InfoCard_Xml_Exception("Invalid Data provided to create instance");
}
$sxe = simplexml_load_string($strXmlData);
if($sxe->getName() != "EncryptedKey") {
throw new Zend_InfoCard_Xml_Exception("Invalid XML Block provided for EncryptedKey");
}
return simplexml_load_string($strXmlData, "Zend_InfoCard_Xml_EncryptedKey");
}
/**
* Returns the Encyption Method Algorithm URI of the block
*
* @throws Zend_InfoCard_Xml_Exception
* @return string the Encryption method algorithm URI
*/
public function getEncryptionMethod()
{
$this->registerXPathNamespace('e', 'http://www.w3.org/2001/04/xmlenc#');
list($encryption_method) = $this->xpath("//e:EncryptionMethod");
if(!($encryption_method instanceof Zend_InfoCard_Xml_Element)) {
throw new Zend_InfoCard_Xml_Exception("Unable to find the e:EncryptionMethod KeyInfo 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 Digest Method Algorithm URI used
*
* @throws Zend_InfoCard_Xml_Exception
* @return string the Digest Method Algorithm URI
*/
public function getDigestMethod()
{
$this->registerXPathNamespace('e', 'http://www.w3.org/2001/04/xmlenc#');
list($encryption_method) = $this->xpath("//e:EncryptionMethod");
if(!($encryption_method instanceof Zend_InfoCard_Xml_Element)) {
throw new Zend_InfoCard_Xml_Exception("Unable to find the e:EncryptionMethod KeyInfo encryption block");
}
if(!($encryption_method->DigestMethod instanceof Zend_InfoCard_Xml_Element)) {
throw new Zend_InfoCard_Xml_Exception("Unable to find the DigestMethod block");
}
$dom = self::convertToDOM($encryption_method->DigestMethod);
if(!$dom->hasAttribute('Algorithm')) {
throw new Zend_InfoCard_Xml_Exception("Unable to determine the digest algorithm for the symmetric Keyinfo");
}
return $dom->getAttribute('Algorithm');
}
/**
* Returns the KeyInfo block object
*
* @throws Zend_InfoCard_Xml_Exception
* @return Zend_InfoCard_Xml_KeyInfo_Abstract
*/
public function getKeyInfo()
{
if(isset($this->KeyInfo)) {
return Zend_InfoCard_Xml_KeyInfo::getInstance($this->KeyInfo);
}
throw new Zend_InfoCard_Xml_Exception("Unable to locate a KeyInfo block");
}
/**
* Return the encrypted value of the block in base64 format
*
* @throws Zend_InfoCard_Xml_Exception
* @return string The Value of the CipherValue block in base64 format
*/
public function getCipherValue()
{
$this->registerXPathNamespace('e', 'http://www.w3.org/2001/04/xmlenc#');
list($cipherdata) = $this->xpath("//e:CipherData");
if(!($cipherdata instanceof Zend_InfoCard_Xml_Element)) {
throw new Zend_InfoCard_Xml_Exception("Unable to find the e:CipherData block");
}
$cipherdata->registerXPathNameSpace('enc', 'http://www.w3.org/2001/04/xmlenc#');
list($ciphervalue) = $cipherdata->xpath("//enc:CipherValue");
if(!($ciphervalue instanceof Zend_InfoCard_Xml_Element)) {
throw new Zend_InfoCard_Xml_Exception("Unable to fidn the enc:CipherValue block");
}
return (string)$ciphervalue;
}
}
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