118 lines
3.8 KiB
PHP
118 lines
3.8 KiB
PHP
<?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_Cipher
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* @copyright Copyright (c) 2005-2008 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: Rsa.php 9094 2008-03-30 18:36:55Z thomas $
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*/
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/**
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* Zend_InfoCard_Cipher_Pki_Adapter_Abstract
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*/
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require_once 'Zend/InfoCard/Cipher/Pki/Adapter/Abstract.php';
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/**
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* Zend_InfoCard_Cipher_Pki_Rsa_Interface
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*/
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require_once 'Zend/InfoCard/Cipher/Pki/Rsa/Interface.php';
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/**
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* RSA Public Key Encryption Cipher Object for the InfoCard component. Relies on OpenSSL
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* to implement the RSA algorithm
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*
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* @category Zend
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* @package Zend_InfoCard
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* @subpackage Zend_InfoCard_Cipher
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* @copyright Copyright (c) 2005-2008 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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class Zend_InfoCard_Cipher_Pki_Adapter_Rsa
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extends Zend_InfoCard_Cipher_Pki_Adapter_Abstract
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implements Zend_InfoCard_Cipher_Pki_Rsa_Interface
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{
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/**
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* Object Constructor
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*
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* @param integer $padding The type of Padding to use
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*/
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public function __construct($padding = Zend_InfoCard_Cipher_Pki_Adapter_Abstract::NO_PADDING)
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{
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// Can't test this..
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// @codeCoverageIgnoreStart
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if(!extension_loaded('openssl')) {
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throw new Zend_InfoCard_Cipher_Exception("Use of this PKI RSA Adapter requires the openssl extension loaded");
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}
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// @codeCoverageIgnoreEnd
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$this->setPadding($padding);
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}
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/**
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* Decrypts RSA encrypted data using the given private key
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*
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* @throws Zend_InfoCard_Cipher_Exception
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* @param string $encryptedData The encrypted data in binary format
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* @param string $privateKey The private key in binary format
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* @param string $password The private key passphrase
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* @param integer $padding The padding to use during decryption (of not provided object value will be used)
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* @return string The decrypted data
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*/
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public function decrypt($encryptedData, $privateKey, $password = null, $padding = null)
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{
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$private_key = openssl_pkey_get_private(array($privateKey, $password));
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if(!$private_key) {
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throw new Zend_InfoCard_Cipher_Exception("Failed to load private key");
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}
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if(!is_null($padding)) {
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try {
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$this->setPadding($padding);
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} catch(Exception $e) {
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openssl_free_key($private_key);
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throw $e;
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}
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}
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switch($this->getPadding()) {
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case self::NO_PADDING:
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$openssl_padding = OPENSSL_NO_PADDING;
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break;
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case self::OAEP_PADDING:
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$openssl_padding = OPENSSL_PKCS1_OAEP_PADDING;
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break;
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}
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$result = openssl_private_decrypt($encryptedData, $decryptedData, $private_key, $openssl_padding);
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openssl_free_key($private_key);
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if(!$result) {
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throw new Zend_InfoCard_Cipher_Exception("Unable to Decrypt Value using provided private key");
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}
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if($this->getPadding() == self::NO_PADDING) {
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$decryptedData = substr($decryptedData, 2);
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$start = strpos($decryptedData, 0) + 1;
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$decryptedData = substr($decryptedData, $start);
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}
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return $decryptedData;
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}
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}
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