SharedKeyAuthScheme.php
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<?php
/**
* LICENSE: Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* PHP version 5
*
* @category Microsoft
* @package WindowsAzure\Common\Internal\Authentication
* @author Azure PHP SDK <azurephpsdk@microsoft.com>
* @copyright 2012 Microsoft Corporation
* @license http://www.apache.org/licenses/LICENSE-2.0 Apache License 2.0
* @link https://github.com/windowsazure/azure-sdk-for-php
*/
namespace WindowsAzure\Common\Internal\Authentication;
use WindowsAzure\Common\Internal\Authentication\StorageAuthScheme;
use WindowsAzure\Common\Internal\Resources;
use WindowsAzure\Common\Internal\Utilities;
/**
* Provides shared key authentication scheme for blob and queue. For more info
* check: http://msdn.microsoft.com/en-us/library/windowsazure/dd179428.aspx
*
* @category Microsoft
* @package WindowsAzure\Common\Internal\Authentication
* @author Azure PHP SDK <azurephpsdk@microsoft.com>
* @copyright 2012 Microsoft Corporation
* @license http://www.apache.org/licenses/LICENSE-2.0 Apache License 2.0
* @version Release: 0.4.1_2015-03
* @link https://github.com/windowsazure/azure-sdk-for-php
*/
class SharedKeyAuthScheme extends StorageAuthScheme
{
protected $includedHeaders;
/**
* Constructor.
*
* @param string $accountName storage account name.
* @param string $accountKey storage account primary or secondary key.
*
* @return
* WindowsAzure\Common\Internal\Authentication\SharedKeyAuthScheme
*/
public function __construct($accountName, $accountKey)
{
parent::__construct($accountName, $accountKey);
$this->includedHeaders = array();
$this->includedHeaders[] = Resources::CONTENT_ENCODING;
$this->includedHeaders[] = Resources::CONTENT_LANGUAGE;
$this->includedHeaders[] = Resources::CONTENT_LENGTH;
$this->includedHeaders[] = Resources::CONTENT_MD5;
$this->includedHeaders[] = Resources::CONTENT_TYPE;
$this->includedHeaders[] = Resources::DATE;
$this->includedHeaders[] = Resources::IF_MODIFIED_SINCE;
$this->includedHeaders[] = Resources::IF_MATCH;
$this->includedHeaders[] = Resources::IF_NONE_MATCH;
$this->includedHeaders[] = Resources::IF_UNMODIFIED_SINCE;
$this->includedHeaders[] = Resources::RANGE;
}
/**
* Computes the authorization signature for blob and queue shared key.
*
* @param array $headers request headers.
* @param string $url reuqest url.
* @param array $queryParams query variables.
* @param string $httpMethod request http method.
*
* @see Blob and Queue Services (Shared Key Authentication) at
* http://msdn.microsoft.com/en-us/library/windowsazure/dd179428.aspx
*
* @return string
*/
protected function computeSignature($headers, $url, $queryParams, $httpMethod)
{
$canonicalizedHeaders = parent::computeCanonicalizedHeaders($headers);
$canonicalizedResource = parent::computeCanonicalizedResource(
$url, $queryParams
);
$stringToSign = array();
$stringToSign[] = strtoupper($httpMethod);
foreach ($this->includedHeaders as $header) {
$stringToSign[] = Utilities::tryGetValue($headers, $header);
}
if (count($canonicalizedHeaders) > 0) {
$stringToSign[] = implode("\n", $canonicalizedHeaders);
}
$stringToSign[] = $canonicalizedResource;
$stringToSign = implode("\n", $stringToSign);
return $stringToSign;
}
/**
* Returns authorization header to be included in the request.
*
* @param array $headers request headers.
* @param string $url reuqest url.
* @param array $queryParams query variables.
* @param string $httpMethod request http method.
*
* @see Specifying the Authorization Header section at
* http://msdn.microsoft.com/en-us/library/windowsazure/dd179428.aspx
*
* @return string
*/
public function getAuthorizationHeader($headers, $url, $queryParams, $httpMethod)
{
$signature = $this->computeSignature(
$headers, $url, $queryParams, $httpMethod
);
return 'SharedKey ' . $this->accountName . ':' . base64_encode(
hash_hmac('sha256', $signature, base64_decode($this->accountKey), true)
);
}
}