File Source for SharedKeyLite.php

<?php
/**
* Copyright (c) 2009 - 2011, RealDolmen
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of RealDolmen nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY RealDolmen ''AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL RealDolmen BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* @category Microsoft
* @package Microsoft_WindowsAzure
* @copyright Copyright (c) 2009 - 2011, RealDolmen (http://www.realdolmen.com)
* @license http://phpazure.codeplex.com/license
* @version $Id: SharedKeyCredentials.php 14561 2009-05-07 08:05:12Z unknown $
*/
/**
* @see Microsoft_AutoLoader
*/
require_once dirname(__FILE__) . '/../../AutoLoader.php';
/**
* @category Microsoft
* @package Microsoft_WindowsAzure
* @copyright Copyright (c) 2009 - 2011, RealDolmen (http://www.realdolmen.com)
* @license http://phpazure.codeplex.com/license
*/
class Microsoft_WindowsAzure_Credentials_SharedKeyLite
extends Microsoft_WindowsAzure_Credentials_CredentialsAbstract
{
/**
* Sign request URL with credentials
*
* @param string $requestUrl Request URL
* @param string $resourceType Resource type
* @param string $requiredPermission Required permission
* @return string Signed request URL
*/
public function signRequestUrl(
$requestUrl = '',
$resourceType = Microsoft_WindowsAzure_Storage::RESOURCE_UNKNOWN,
$requiredPermission = Microsoft_WindowsAzure_Credentials_CredentialsAbstract::PERMISSION_READ
) {
return $requestUrl;
}
/**
* Sign request headers with credentials
*
* @param string $httpVerb HTTP verb the request will use
* @param string $path Path for the request
* @param array $query Query arguments for the request (key/value pairs)
* @param array $headers x-ms headers to add
* @param boolean $forTableStorage Is the request for table storage?
* @param string $resourceType Resource type
* @param string $requiredPermission Required permission
* @param mixed $rawData Raw post data
* @return array Array of headers
*/
public function signRequestHeaders(
$httpVerb = Microsoft_Http_Client::GET,
$path = '/',
$query = array(),
$headers = null,
$forTableStorage = false,
$resourceType = Microsoft_WindowsAzure_Storage::RESOURCE_UNKNOWN,
$requiredPermission = Microsoft_WindowsAzure_Credentials_CredentialsAbstract::PERMISSION_READ,
$rawData = null
) {
// Table storage?
if (!$forTableStorage) {
throw new Microsoft_WindowsAzure_Credentials_Exception('The Windows Azure SDK for PHP does not support SharedKeyLite authentication on blob or queue storage. Use SharedKey authentication instead.');
}
// Determine path
if ($this->_usePathStyleUri) {
$path = substr($path, strpos($path, '/'));
}
// Build canonicalized resource string
$canonicalizedResource = '/' . $this->_accountName;
if ($this->_usePathStyleUri) {
$canonicalizedResource .= '/' . $this->_accountName;
}
$canonicalizedResource .= $path;
if (isset($query['comp'])) {
$canonicalizedResource .= '?comp=' . rawurlencode($query['comp']);
}
// Request date
$requestDate = '';
if (isset($headers[Microsoft_WindowsAzure_Credentials_CredentialsAbstract::PREFIX_STORAGE_HEADER . 'date'])) {
$requestDate = $headers[Microsoft_WindowsAzure_Credentials_CredentialsAbstract::PREFIX_STORAGE_HEADER . 'date'];
} else {
$requestDate = gmdate('D, d M Y H:i:s', time()) . ' GMT'; // RFC 1123
}
// Create string to sign
$stringToSign = array();
$stringToSign[] = $requestDate; // Date
$stringToSign[] = $canonicalizedResource; // Canonicalized resource
$stringToSign = implode("\n", $stringToSign);
$signString = base64_encode(hash_hmac('sha256', $stringToSign, $this->_accountKey, true));
// Sign request
$headers[Microsoft_WindowsAzure_Credentials_CredentialsAbstract::PREFIX_STORAGE_HEADER . 'date'] = $requestDate;
$headers['Authorization'] = 'SharedKeyLite ' . $this->_accountName . ':' . $signString;
// Return headers
return $headers;
}
/**
* Prepare query string for signing
*
* @param string $value Original query string
* @return string Query string for signing
*/
protected function _prepareQueryStringForSigning($value)
{
// Check for 'comp='
if (strpos($value, 'comp=') === false) {
// If not found, no query string needed
return '';
} else {
// If found, make sure it is the only parameter being used
if (strlen($value) > 0 && strpos($value, '?') === 0) {
$value = substr($value, 1);
}
// Split parts
$queryParts = explode('&', $value);
foreach ($queryParts as $queryPart) {
if (strpos($queryPart, 'comp=') !== false) {
return '?' . $queryPart;
}
}
// Should never happen...
return '';
}
}
}

Source for file SharedKeyLite.php