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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_Cipher
* @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: Rsa.php 16214 2009-06-21 19:34:03Z thomas $
*/
/**
* Zend_InfoCard_Cipher_Pki_Adapter_Abstract
*/
require_once 'Zend/InfoCard/Cipher/Pki/Adapter/Abstract.php';
/**
* Zend_InfoCard_Cipher_Pki_Rsa_Interface
*/
require_once 'Zend/InfoCard/Cipher/Pki/Rsa/Interface.php';
/**
* RSA Public Key Encryption Cipher Object for the InfoCard component. Relies on OpenSSL
* to implement the RSA algorithm
*
* @category Zend
* @package Zend_InfoCard
* @subpackage Zend_InfoCard_Cipher
* @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_Cipher_Pki_Adapter_Rsa
extends Zend_InfoCard_Cipher_Pki_Adapter_Abstract
implements Zend_InfoCard_Cipher_Pki_Rsa_Interface
{
/**
* Object Constructor
*
* @param integer $padding The type of Padding to use
*/
public function __construct($padding = Zend_InfoCard_Cipher_Pki_Adapter_Abstract::NO_PADDING)
{
// Can't test this..
// @codeCoverageIgnoreStart
if(!extension_loaded('openssl')) {
require_once 'Zend/InfoCard/Cipher/Exception.php';
throw new Zend_InfoCard_Cipher_Exception("Use of this PKI RSA Adapter requires the openssl extension loaded");
}
// @codeCoverageIgnoreEnd
$this->setPadding($padding);
}
/**
* Decrypts RSA encrypted data using the given private key
*
* @throws Zend_InfoCard_Cipher_Exception
* @param string $encryptedData The encrypted data in binary format
* @param string $privateKey The private key in binary format
* @param string $password The private key passphrase
* @param integer $padding The padding to use during decryption (of not provided object value will be used)
* @return string The decrypted data
*/
public function decrypt($encryptedData, $privateKey, $password = null, $padding = null)
{
$private_key = openssl_pkey_get_private(array($privateKey, $password));
if(!$private_key) {
require_once 'Zend/InfoCard/Cipher/Exception.php';
throw new Zend_InfoCard_Cipher_Exception("Failed to load private key");
}
if($padding !== null) {
try {
$this->setPadding($padding);
} catch(Exception $e) {
openssl_free_key($private_key);
throw $e;
}
}
switch($this->getPadding()) {
case self::NO_PADDING:
$openssl_padding = OPENSSL_NO_PADDING;
break;
case self::OAEP_PADDING:
$openssl_padding = OPENSSL_PKCS1_OAEP_PADDING;
break;
}
$result = openssl_private_decrypt($encryptedData, $decryptedData, $private_key, $openssl_padding);
openssl_free_key($private_key);
if(!$result) {
require_once 'Zend/InfoCard/Cipher/Exception.php';
throw new Zend_InfoCard_Cipher_Exception("Unable to Decrypt Value using provided private key");
}
if($this->getPadding() == self::NO_PADDING) {
$decryptedData = substr($decryptedData, 2);
$start = strpos($decryptedData, 0) + 1;
$decryptedData = substr($decryptedData, $start);
}
return $decryptedData;
}
}
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