nextcloud/apps/files_external/3rdparty/aws-sdk-php/Aws/Common/Signature/SignatureV3.php

103 lines
3.4 KiB
PHP

<?php
/**
* Copyright 2010-2013 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file 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.
*/
namespace Aws\Common\Signature;
use Aws\Common\Credentials\CredentialsInterface;
use Aws\Common\Enum\DateFormat;
use Guzzle\Http\Message\RequestInterface;
use Guzzle\Http\Message\EntityEnclosingRequestInterface;
/**
* Implementation of Signature Version 3
* @link http://docs.amazonwebservices.com/amazonswf/latest/developerguide/HMACAuth-swf.html
*/
class SignatureV3 extends AbstractSignature
{
/**
* Get an array of headers to be signed
*
* @param RequestInterface $request Request to get headers from
*
* @return array
*/
protected function getHeadersToSign(RequestInterface $request)
{
$headers = array();
foreach ($request->getHeaders()->toArray() as $k => $v) {
$k = strtolower($k);
if ($k == 'host' || strpos($k, 'x-amz-') !== false) {
$headers[$k] = implode(',', $v);
}
}
// Sort the headers alphabetically and add them to the string to sign
ksort($headers);
return $headers;
}
/**
* {@inheritdoc}
*/
public function signRequest(RequestInterface $request, CredentialsInterface $credentials)
{
// Refresh the cached timestamp
$this->getTimestamp(true);
// Add default headers
$request->setHeader('x-amz-date', $this->getDateTime(DateFormat::RFC1123));
// Add the security token if one is present
if ($credentials->getSecurityToken()) {
$request->setHeader('x-amz-security-token', $credentials->getSecurityToken());
}
// Grab the path and ensure that it is absolute
$path = '/' . ltrim($request->getUrl(true)->normalizePath()->getPath(), '/');
// Begin building the string to sign
$sign = $request->getMethod() . "\n"
. "{$path}\n"
. $this->getCanonicalizedQueryString($request) . "\n";
// Get all of the headers that must be signed (host and x-amz-*)
$headers = $this->getHeadersToSign($request);
foreach ($headers as $key => $value) {
$sign .= $key . ':' . $value . "\n";
}
$sign .= "\n";
// Add the body of the request if a body is present
if ($request instanceof EntityEnclosingRequestInterface) {
$sign .= (string) $request->getBody();
}
// Add the string to sign to the request for debugging purposes
$request->getParams()->set('aws.string_to_sign', $sign);
$signature = base64_encode(hash_hmac('sha256',
hash('sha256', $sign, true), $credentials->getSecretKey(), true));
// Add the authorization header to the request
$request->setHeader('x-amzn-authorization', sprintf('AWS3 AWSAccessKeyId=%s,Algorithm=HmacSHA256,SignedHeaders=%s,Signature=%s',
$credentials->getAccessKeyId(),
implode(';', array_keys($headers)),
$signature));
}
}