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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_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: SignatureAbstract.php 20217 2010-01-12 16:01:57Z matthew $
*/
/** Zend_Oauth_Http_Utility */
require_once 'Zend/Oauth/Http/Utility.php';
/** Zend_Uri_Http */
require_once 'Zend/Uri/Http.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
*/
abstract class Zend_Oauth_Signature_SignatureAbstract
{
/**
* Hash algorithm to use when generating signature
* @var string
*/
protected $_hashAlgorithm = null;
/**
* Key to use when signing
* @var string
*/
protected $_key = null;
/**
* Consumer secret
* @var string
*/
protected $_consumerSecret = null;
/**
* Token secret
* @var string
*/
protected $_tokenSecret = '';
/**
* Constructor
*
* @param string $consumerSecret
* @param null|string $tokenSecret
* @param null|string $hashAlgo
* @return void
*/
public function __construct($consumerSecret, $tokenSecret = null, $hashAlgo = null)
{
$this->_consumerSecret = $consumerSecret;
if (isset($tokenSecret)) {
$this->_tokenSecret = $tokenSecret;
}
$this->_key = $this->_assembleKey();
if (isset($hashAlgo)) {
$this->_hashAlgorithm = $hashAlgo;
}
}
/**
* Sign a request
*
* @param array $params
* @param null|string $method
* @param null|string $url
* @return string
*/
public abstract function sign(array $params, $method = null, $url = null);
/**
* Normalize the base signature URL
*
* @param string $url
* @return string
*/
public function normaliseBaseSignatureUrl($url)
{
$uri = Zend_Uri_Http::fromString($url);
if ($uri->getScheme() == 'http' && $uri->getPort() == '80') {
$uri->setPort('');
} elseif ($uri->getScheme() == 'https' && $uri->getPort() == '443') {
$uri->setPort('');
}
$uri->setQuery('');
$uri->setFragment('');
$uri->setHost(strtolower($uri->getHost()));
return $uri->getUri(true);
}
/**
* Assemble key from consumer and token secrets
*
* @return string
*/
protected function _assembleKey()
{
$parts = array($this->_consumerSecret);
if (!is_null($this->_tokenSecret)) {
$parts[] = $this->_tokenSecret;
}
foreach ($parts as $key => $secret) {
$parts[$key] = Zend_Oauth_Http_Utility::urlEncode($secret);
}
return implode('&', $parts);
}
/**
* Get base signature string
*
* @param array $params
* @param null|string $method
* @param null|string $url
* @return string
*/
protected function _getBaseSignatureString(array $params, $method = null, $url = null)
{
$encodedParams = array();
foreach ($params as $key => $value) {
$encodedParams[Zend_Oauth_Http_Utility::urlEncode($key)] =
Zend_Oauth_Http_Utility::urlEncode($value);
}
$baseStrings = array();
if (isset($method)) {
$baseStrings[] = strtoupper($method);
}
if (isset($url)) {
// should normalise later
$baseStrings[] = Zend_Oauth_Http_Utility::urlEncode(
$this->normaliseBaseSignatureUrl($url)
);
}
if (isset($encodedParams['oauth_signature'])) {
unset($encodedParams['oauth_signature']);
}
$baseStrings[] = Zend_Oauth_Http_Utility::urlEncode(
$this->_toByteValueOrderedQueryString($encodedParams)
);
return implode('&', $baseStrings);
}
/**
* Transform an array to a byte value ordered query string
*
* @param array $params
* @return string
*/
protected function _toByteValueOrderedQueryString(array $params)
{
$return = array();
uksort($params, 'strnatcmp');
foreach ($params as $key => $value) {
if (is_array($value)) {
natsort($value);
foreach ($value as $keyduplicate) {
$return[] = $key . '=' . $keyduplicate;
}
} else {
$return[] = $key . '=' . $value;
}
}
return implode('&', $return);
}
}
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