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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) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: SecurityTokenReference.php 16214 2009-06-21 19:34:03Z thomas $
*/
/**
* Zend_InfoCard_Xml_Element
*/
require_once 'Zend/InfoCard/Xml/Element.php';
/**
* Represents a SecurityTokenReference XML block
*
* @category Zend
* @package Zend_InfoCard
* @subpackage Zend_InfoCard_Xml
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_InfoCard_Xml_SecurityTokenReference extends Zend_InfoCard_Xml_Element
{
/**
* Base64 Binary Encoding URI
*/
const ENCODING_BASE64BIN = 'http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-message-security-1.0#Base64Binary';
/**
* Return an instance of the object based on the input XML
*
* @param string $xmlData The SecurityTokenReference XML Block
* @return Zend_InfoCard_Xml_SecurityTokenReference
* @throws Zend_InfoCard_Xml_Exception
*/
static public function getInstance($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($sxe->getName() != "SecurityTokenReference") {
throw new Zend_InfoCard_Xml_Exception("Invalid XML Block provided for SecurityTokenReference");
}
return simplexml_load_string($strXmlData, "Zend_InfoCard_Xml_SecurityTokenReference");
}
/**
* Return the Key Identifier XML Object
*
* @return Zend_InfoCard_Xml_Element
* @throws Zend_InfoCard_Xml_Exception
*/
protected function _getKeyIdentifier()
{
$this->registerXPathNamespace('o', 'http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd');
list($keyident) = $this->xpath('//o:KeyIdentifier');
if(!($keyident instanceof Zend_InfoCard_Xml_Element)) {
throw new Zend_InfoCard_Xml_Exception("Failed to retrieve Key Identifier");
}
return $keyident;
}
/**
* Return the Key URI identifying the thumbprint type used
*
* @return string The thumbprint type URI
* @throws Zend_InfoCard_Xml_Exception
*/
public function getKeyThumbprintType()
{
$keyident = $this->_getKeyIdentifier();
$dom = self::convertToDOM($keyident);
if(!$dom->hasAttribute('ValueType')) {
throw new Zend_InfoCard_Xml_Exception("Key Identifier did not provide a type for the value");
}
return $dom->getAttribute('ValueType');
}
/**
* Return the thumbprint encoding type used as a URI
*
* @return string the URI of the thumbprint encoding used
* @throws Zend_InfoCard_Xml_Exception
*/
public function getKeyThumbprintEncodingType()
{
$keyident = $this->_getKeyIdentifier();
$dom = self::convertToDOM($keyident);
if(!$dom->hasAttribute('EncodingType')) {
throw new Zend_InfoCard_Xml_Exception("Unable to determine the encoding type for the key identifier");
}
return $dom->getAttribute('EncodingType');
}
/**
* Get the key reference data used to identify the public key
*
* @param bool $decode if true, will return a decoded version of the key
* @return string the key reference thumbprint, either in binary or encoded form
* @throws Zend_InfoCard_Xml_Exception
*/
public function getKeyReference($decode = true)
{
$keyIdentifier = $this->_getKeyIdentifier();
$dom = self::convertToDOM($keyIdentifier);
$encoded = $dom->nodeValue;
if(empty($encoded)) {
throw new Zend_InfoCard_Xml_Exception("Could not find the Key Reference Encoded Value");
}
if($decode) {
$decoded = "";
switch($this->getKeyThumbprintEncodingType()) {
case self::ENCODING_BASE64BIN:
if(version_compare(PHP_VERSION, "5.2.0", ">=")) {
$decoded = base64_decode($encoded, true);
} else {
$decoded = base64_decode($encoded);
}
break;
default:
throw new Zend_InfoCard_Xml_Exception("Unknown Key Reference Encoding Type: {$this->getKeyThumbprintEncodingType()}");
}
if(!$decoded || empty($decoded)) {
throw new Zend_InfoCard_Xml_Exception("Failed to decode key reference");
}
return $decoded;
}
return $encoded;
}
}
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