<?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_Crypt

 * @subpackage Rsa

 * @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: Private.php 22662 2010-07-24 17:37:36Z mabe $

 */

/**

 * @see Zend_Crypt_Rsa_Key

 */

require_once 'Zend/Crypt/Rsa/Key.php';

/**

 * @category   Zend

 * @package    Zend_Crypt

 * @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_Crypt_Rsa_Key_Private extends Zend_Crypt_Rsa_Key

{

    protected $_publicKey = null;

    public function __construct($pemString, $passPhrase = null)

    {

        $this->_pemString = $pemString;

        $this->_parse($passPhrase);

    }

    /**

     * @param string $passPhrase

     * @throws Zend_Crypt_Exception

     */

    protected function _parse($passPhrase)

    {

        $result = openssl_get_privatekey($this->_pemString, $passPhrase);

        if (!$result) {

            /**

             * @see Zend_Crypt_Exception

             */

            require_once 'Zend/Crypt/Exception.php';

            throw new Zend_Crypt_Exception('Unable to load private key');

        }

        $this->_opensslKeyResource = $result;

        $this->_details = openssl_pkey_get_details($this->_opensslKeyResource);

    }

    public function getPublicKey()

    {

        if ($this->_publicKey === null) {

            /**

             * @see Zend_Crypt_Rsa_Key_Public

             */

            require_once 'Zend/Crypt/Rsa/Key/Public.php';

            $this->_publicKey = new Zend_Crypt_Rsa_Key_Public($this->_details['key']);

        }

        return $this->_publicKey;

    }

}