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<?php
/**
* SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
namespace OC\Files\ObjectStore;
use Aws\ClientResolver;
use Aws\Credentials\CredentialProvider;
use Aws\Credentials\Credentials;
use Aws\Exception\CredentialsException;
use Aws\S3\Exception\S3Exception;
use Aws\S3\S3Client;
use GuzzleHttp\Promise\Create;
use GuzzleHttp\Promise\RejectedPromise;
use OCP\ICertificateManager;
use OCP\Server;
use Psr\Log\LoggerInterface;
trait S3ConnectionTrait {
use S3ConfigTrait;
protected string $id;
protected bool $test;
protected ?S3Client $connection = null;
protected function parseParams($params) {
if (empty($params['bucket'])) {
throw new \Exception('Bucket has to be configured.');
}
$this->id = 'amazon::' . $params['bucket'];
$this->test = isset($params['test']);
$this->bucket = $params['bucket'];
// Default to 5 like the S3 SDK does
$this->concurrency = $params['concurrency'] ?? 5;
$this->proxy = $params['proxy'] ?? false;
$this->timeout = $params['timeout'] ?? 15;
$this->storageClass = !empty($params['storageClass']) ? $params['storageClass'] : 'STANDARD';
$this->uploadPartSize = $params['uploadPartSize'] ?? 524288000;
$this->putSizeLimit = $params['putSizeLimit'] ?? 104857600;
$this->copySizeLimit = $params['copySizeLimit'] ?? 5242880000;
$this->useMultipartCopy = (bool)($params['useMultipartCopy'] ?? true);
$params['region'] = empty($params['region']) ? 'eu-west-1' : $params['region'];
$params['hostname'] = empty($params['hostname']) ? 's3.' . $params['region'] . '.amazonaws.com' : $params['hostname'];
$params['s3-accelerate'] = $params['hostname'] === 's3-accelerate.amazonaws.com' || $params['hostname'] === 's3-accelerate.dualstack.amazonaws.com';
if (!isset($params['port']) || $params['port'] === '') {
$params['port'] = (isset($params['use_ssl']) && $params['use_ssl'] === false) ? 80 : 443;
}
$params['verify_bucket_exists'] = $params['verify_bucket_exists'] ?? true;
if ($params['s3-accelerate']) {
$params['verify_bucket_exists'] = false;
}
$this->params = $params;
}
public function getBucket() {
return $this->bucket;
}
public function getProxy() {
return $this->proxy;
}
/**
* Returns the connection
*
* @return S3Client connected client
* @throws \Exception if connection could not be made
*/
public function getConnection() {
if ($this->connection !== null) {
return $this->connection;
}
$scheme = (isset($this->params['use_ssl']) && $this->params['use_ssl'] === false) ? 'http' : 'https';
$base_url = $scheme . '://' . $this->params['hostname'] . ':' . $this->params['port'] . '/';
// Adding explicit credential provider to the beginning chain.
// Including default credential provider (skipping AWS shared config files).
$provider = CredentialProvider::memoize(
CredentialProvider::chain(
$this->paramCredentialProvider(),
CredentialProvider::defaultProvider(['use_aws_shared_config_files' => false])
)
);
$options = [
'version' => $this->params['version'] ?? 'latest',
'credentials' => $provider,
'endpoint' => $base_url,
'region' => $this->params['region'],
'use_path_style_endpoint' => isset($this->params['use_path_style']) ? $this->params['use_path_style'] : false,
'signature_provider' => \Aws\or_chain([self::class, 'legacySignatureProvider'], ClientResolver::_default_signature_provider()),
'csm' => false,
'use_arn_region' => false,
'http' => [
'verify' => $this->getCertificateBundlePath(),
// Timeout for the connection to S3 server, not for the request.
'connect_timeout' => 5
],
'use_aws_shared_config_files' => false,
];
if ($this->params['s3-accelerate']) {
$options['use_accelerate_endpoint'] = true;
} else {
$options['endpoint'] = $base_url;
}
if ($this->getProxy()) {
$options['http']['proxy'] = $this->getProxy();
}
if (isset($this->params['legacy_auth']) && $this->params['legacy_auth']) {
$options['signature_version'] = 'v2';
}
$this->connection = new S3Client($options);
try {
$logger = Server::get(LoggerInterface::class);
if (!$this->connection::isBucketDnsCompatible($this->bucket)) {
$logger->debug('Bucket "' . $this->bucket . '" This bucket name is not dns compatible, it may contain invalid characters.',
['app' => 'objectstore']);
}
if ($this->params['verify_bucket_exists'] && !$this->connection->doesBucketExist($this->bucket)) {
try {
$logger->info('Bucket "' . $this->bucket . '" does not exist - creating it.', ['app' => 'objectstore']);
if (!$this->connection::isBucketDnsCompatible($this->bucket)) {
throw new \Exception('The bucket will not be created because the name is not dns compatible, please correct it: ' . $this->bucket);
}
$this->connection->createBucket(['Bucket' => $this->bucket]);
$this->testTimeout();
} catch (S3Exception $e) {
$logger->debug('Invalid remote storage.', [
'exception' => $e,
'app' => 'objectstore',
]);
if ($e->getAwsErrorCode() !== 'BucketAlreadyOwnedByYou') {
throw new \Exception('Creation of bucket "' . $this->bucket . '" failed. ' . $e->getMessage());
}
}
}
// google cloud's s3 compatibility doesn't like the EncodingType parameter
if (strpos($base_url, 'storage.googleapis.com')) {
$this->connection->getHandlerList()->remove('s3.auto_encode');
}
} catch (S3Exception $e) {
throw new \Exception('S3 service is unable to handle request: ' . $e->getMessage());
}
return $this->connection;
}
/**
* when running the tests wait to let the buckets catch up
*/
private function testTimeout() {
if ($this->test) {
sleep($this->timeout);
}
}
public static function legacySignatureProvider($version, $service, $region) {
switch ($version) {
case 'v2':
case 's3':
return new S3Signature();
default:
return null;
}
}
/**
* This function creates a credential provider based on user parameter file
*/
protected function paramCredentialProvider(): callable {
return function () {
$key = empty($this->params['key']) ? null : $this->params['key'];
$secret = empty($this->params['secret']) ? null : $this->params['secret'];
if ($key && $secret) {
return Create::promiseFor(
new Credentials($key, $secret)
);
}
$msg = 'Could not find parameters set for credentials in config file.';
return new RejectedPromise(new CredentialsException($msg));
};
}
protected function getCertificateBundlePath(): ?string {
if ((int)($this->params['use_nextcloud_bundle'] ?? '0')) {
// since we store the certificate bundles on the primary storage, we can't get the bundle while setting up the primary storage
if (!isset($this->params['primary_storage'])) {
/** @var ICertificateManager $certManager */
$certManager = Server::get(ICertificateManager::class);
return $certManager->getAbsoluteBundlePath();
} else {
return \OC::$SERVERROOT . '/resources/config/ca-bundle.crt';
}
} else {
return null;
}
}
protected function getSSECKey(): ?string {
if (isset($this->params['sse_c_key'])) {
return $this->params['sse_c_key'];
}
return null;
}
protected function getSSECParameters(bool $copy = false): array {
$key = $this->getSSECKey();
if ($key === null) {
return [];
}
$rawKey = base64_decode($key);
if ($copy) {
return [
'CopySourceSSECustomerAlgorithm' => 'AES256',
'CopySourceSSECustomerKey' => $rawKey,
'CopySourceSSECustomerKeyMD5' => md5($rawKey, true)
];
}
return [
'SSECustomerAlgorithm' => 'AES256',
'SSECustomerKey' => $rawKey,
'SSECustomerKeyMD5' => md5($rawKey, true)
];
}
}
|
