<?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_Oauth

 * @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: Rsa.php 20217 2010-01-12 16:01:57Z matthew $

 */

/** Zend_Oauth_Signature_SignatureAbstract */

require_once 'Zend/Oauth/Signature/SignatureAbstract.php';

/** Zend_Crypt_Rsa */

require_once 'Zend/Crypt/Rsa.php';

/**

 * @category   Zend

 * @package    Zend_Oauth

 * @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_Oauth_Signature_Rsa extends Zend_Oauth_Signature_SignatureAbstract

{

    /**

     * Sign a request

     * 

     * @param  array $params 

     * @param  null|string $method 

     * @param  null|string $url 

     * @return string

     */

    public function sign(array $params, $method = null, $url = null) 

    {

        $rsa = new Zend_Crypt_Rsa;

        $rsa->setHashAlgorithm($this->_hashAlgorithm);

        $sign = $rsa->sign(

            $this->_getBaseSignatureString($params, $method, $url),

            $this->_key,

            Zend_Crypt_Rsa::BASE64

        );

        return $sign;

    }

    /**

     * Assemble encryption key

     * 

     * @return string

     */

    protected function _assembleKey()

    {

        return $this->_consumerSecret;

    }

}