nextcloud/apps/files_sharing/lib/External/Manager.php

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<?php
/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Bjoern Schiessle <bjoern@schiessle.org>
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* @author Björn Schießle <bjoern@schiessle.org>
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
* @author Daniel Hansson <daniel@techandme.se>
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* @author Joas Schilling <coding@schilljs.com>
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* @author Jörn Friedrich Dreyer <jfd@butonic.de>
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* @author Lukas Reschke <lukas@statuscode.ch>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Robin Appelman <robin@icewind.nl>
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* @author Roeland Jago Douma <roeland@famdouma.nl>
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* @author Stefan Weil <sw@weilnetz.de>
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*
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OCA\Files_Sharing\External;
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use OC\Files\Filesystem;
use OCA\FederatedFileSharing\Events\FederatedShareAddedEvent;
use OCA\Files_Sharing\Helper;
use OCP\EventDispatcher\IEventDispatcher;
use OCP\Federation\ICloudFederationFactory;
use OCP\Federation\ICloudFederationProviderManager;
use OCP\Files;
use OCP\Files\Storage\IStorageFactory;
use OCP\Http\Client\IClientService;
use OCP\IDBConnection;
use OCP\IGroupManager;
use OCP\IUserManager;
use OCP\Notification\IManager;
use OCP\OCS\IDiscoveryService;
use OCP\Share;
use OCP\Share\IShare;
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class Manager {
public const STORAGE = '\OCA\Files_Sharing\External\Storage';
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/** @var string|null */
private $uid;
/** @var IDBConnection */
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private $connection;
/** @var \OC\Files\Mount\Manager */
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private $mountManager;
/** @var IStorageFactory */
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private $storageLoader;
/** @var IClientService */
private $clientService;
/** @var IManager */
private $notificationManager;
/** @var IDiscoveryService */
private $discoveryService;
/** @var ICloudFederationProviderManager */
private $cloudFederationProviderManager;
/** @var ICloudFederationFactory */
private $cloudFederationFactory;
/** @var IGroupManager */
private $groupManager;
/** @var IUserManager */
private $userManager;
/** @var IEventDispatcher */
private $eventDispatcher;
public function __construct(IDBConnection $connection,
\OC\Files\Mount\Manager $mountManager,
IStorageFactory $storageLoader,
IClientService $clientService,
IManager $notificationManager,
IDiscoveryService $discoveryService,
ICloudFederationProviderManager $cloudFederationProviderManager,
ICloudFederationFactory $cloudFederationFactory,
IGroupManager $groupManager,
IUserManager $userManager,
?string $uid,
IEventDispatcher $eventDispatcher) {
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$this->connection = $connection;
$this->mountManager = $mountManager;
$this->storageLoader = $storageLoader;
$this->clientService = $clientService;
$this->uid = $uid;
$this->notificationManager = $notificationManager;
$this->discoveryService = $discoveryService;
$this->cloudFederationProviderManager = $cloudFederationProviderManager;
$this->cloudFederationFactory = $cloudFederationFactory;
$this->groupManager = $groupManager;
$this->userManager = $userManager;
$this->eventDispatcher = $eventDispatcher;
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}
/**
* add new server-to-server share
*
* @param string $remote
* @param string $token
* @param string $password
* @param string $name
* @param string $owner
* @param int $shareType
* @param boolean $accepted
* @param string $user
* @param int $remoteId
* @param int $parent
* @return Mount|null
* @throws \Doctrine\DBAL\DBALException
*/
public function addShare($remote, $token, $password, $name, $owner, $shareType, $accepted=false, $user = null, $remoteId = -1, $parent = -1) {
$user = $user ? $user : $this->uid;
$accepted = $accepted ? IShare::STATUS_ACCEPTED : IShare::STATUS_PENDING;
$name = Filesystem::normalizePath('/' . $name);
if ($accepted !== IShare::STATUS_ACCEPTED) {
// To avoid conflicts with the mount point generation later,
// we only use a temporary mount point name here. The real
// mount point name will be generated when accepting the share,
// using the original share item name.
$tmpMountPointName = '{{TemporaryMountPointName#' . $name . '}}';
$mountPoint = $tmpMountPointName;
$hash = md5($tmpMountPointName);
$data = [
'remote' => $remote,
'share_token' => $token,
'password' => $password,
'name' => $name,
'owner' => $owner,
'user' => $user,
'mountpoint' => $mountPoint,
'mountpoint_hash' => $hash,
'accepted' => $accepted,
'remote_id' => $remoteId,
'share_type' => $shareType,
];
$i = 1;
while (!$this->connection->insertIfNotExist('*PREFIX*share_external', $data, ['user', 'mountpoint_hash'])) {
// The external share already exists for the user
$data['mountpoint'] = $tmpMountPointName . '-' . $i;
$data['mountpoint_hash'] = md5($data['mountpoint']);
$i++;
}
return null;
}
$mountPoint = Files::buildNotExistingFileName('/', $name);
$mountPoint = Filesystem::normalizePath('/' . $mountPoint);
$hash = md5($mountPoint);
$this->writeShareToDb($remote, $token, $password, $name, $owner, $user, $mountPoint, $hash, $accepted, $remoteId, $parent, $shareType);
$options = [
'remote' => $remote,
'token' => $token,
'password' => $password,
'mountpoint' => $mountPoint,
'owner' => $owner
];
return $this->mountShare($options);
}
/**
* write remote share to the database
*
* @param $remote
* @param $token
* @param $password
* @param $name
* @param $owner
* @param $user
* @param $mountPoint
* @param $hash
* @param $accepted
* @param $remoteId
* @param $parent
* @param $shareType
* @return bool
*/
private function writeShareToDb($remote, $token, $password, $name, $owner, $user, $mountPoint, $hash, $accepted, $remoteId, $parent, $shareType) {
$query = $this->connection->prepare('
INSERT INTO `*PREFIX*share_external`
(`remote`, `share_token`, `password`, `name`, `owner`, `user`, `mountpoint`, `mountpoint_hash`, `accepted`, `remote_id`, `parent`, `share_type`)
VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
');
return $query->execute([$remote, $token, $password, $name, $owner, $user, $mountPoint, $hash, $accepted, $remoteId, $parent, $shareType]);
}
/**
* get share
*
* @param int $id share id
* @return mixed share of false
*/
public function getShare($id) {
$getShare = $this->connection->prepare('
SELECT `id`, `remote`, `remote_id`, `share_token`, `name`, `owner`, `user`, `mountpoint`, `accepted`, `parent`, `share_type`, `password`, `mountpoint_hash`
FROM `*PREFIX*share_external`
WHERE `id` = ?');
$result = $getShare->execute([$id]);
$share = $result ? $getShare->fetch() : [];
$validShare = is_array($share) && isset($share['share_type']) && isset($share['user']);
// check if the user is allowed to access it
if ($validShare && (int)$share['share_type'] === IShare::TYPE_USER && $share['user'] === $this->uid) {
return $share;
} elseif ($validShare && (int)$share['share_type'] === IShare::TYPE_GROUP) {
$user = $this->userManager->get($this->uid);
if ($this->groupManager->get($share['user'])->inGroup($user)) {
return $share;
}
}
return false;
}
/**
* accept server-to-server share
*
* @param int $id
* @return bool True if the share could be accepted, false otherwise
*/
public function acceptShare($id) {
$share = $this->getShare($id);
$result = false;
if ($share) {
\OC_Util::setupFS($this->uid);
$shareFolder = Helper::getShareFolder();
$mountPoint = Files::buildNotExistingFileName($shareFolder, $share['name']);
$mountPoint = Filesystem::normalizePath($mountPoint);
$hash = md5($mountPoint);
$userShareAccepted = false;
if ((int)$share['share_type'] === IShare::TYPE_USER) {
$acceptShare = $this->connection->prepare('
UPDATE `*PREFIX*share_external`
SET `accepted` = ?,
`mountpoint` = ?,
`mountpoint_hash` = ?
WHERE `id` = ? AND `user` = ?');
$userShareAccepted = $acceptShare->execute([1, $mountPoint, $hash, $id, $this->uid]);
} else {
$result = $this->writeShareToDb(
$share['remote'],
$share['share_token'],
$share['password'],
$share['name'],
$share['owner'],
$this->uid,
$mountPoint, $hash, 1,
$share['remote_id'],
$id,
$share['share_type']);
}
if ($userShareAccepted === true) {
$this->sendFeedbackToRemote($share['remote'], $share['share_token'], $share['remote_id'], 'accept');
$event = new FederatedShareAddedEvent($share['remote']);
$this->eventDispatcher->dispatchTyped($event);
$result = true;
}
}
// Make sure the user has no notification for something that does not exist anymore.
$this->processNotification($id);
return $result;
}
/**
* decline server-to-server share
*
* @param int $id
* @return bool True if the share could be declined, false otherwise
*/
public function declineShare($id) {
$share = $this->getShare($id);
$result = false;
if ($share && (int)$share['share_type'] === IShare::TYPE_USER) {
$removeShare = $this->connection->prepare('
DELETE FROM `*PREFIX*share_external` WHERE `id` = ? AND `user` = ?');
$removeShare->execute([$id, $this->uid]);
$this->sendFeedbackToRemote($share['remote'], $share['share_token'], $share['remote_id'], 'decline');
$this->processNotification($id);
$result = true;
} elseif ($share && (int)$share['share_type'] === IShare::TYPE_GROUP) {
$result = $this->writeShareToDb(
$share['remote'],
$share['share_token'],
$share['password'],
$share['name'],
$share['owner'],
$this->uid,
$share['mountpoint'],
$share['mountpoint_hash'],
0,
$share['remote_id'],
$id,
$share['share_type']);
$this->processNotification($id);
}
return $result;
}
/**
* @param int $remoteShare
*/
public function processNotification($remoteShare) {
$filter = $this->notificationManager->createNotification();
$filter->setApp('files_sharing')
->setUser($this->uid)
->setObject('remote_share', (int) $remoteShare);
$this->notificationManager->markProcessed($filter);
}
/**
* inform remote server whether server-to-server share was accepted/declined
*
* @param string $remote
* @param string $token
* @param int $remoteId Share id on the remote host
* @param string $feedback
* @return boolean
*/
private function sendFeedbackToRemote($remote, $token, $remoteId, $feedback) {
$result = $this->tryOCMEndPoint($remote, $token, $remoteId, $feedback);
if ($result === true) {
return true;
}
$federationEndpoints = $this->discoveryService->discover($remote, 'FEDERATED_SHARING');
$endpoint = isset($federationEndpoints['share']) ? $federationEndpoints['share'] : '/ocs/v2.php/cloud/shares';
$url = rtrim($remote, '/') . $endpoint . '/' . $remoteId . '/' . $feedback . '?format=' . Share::RESPONSE_FORMAT;
$fields = ['token' => $token];
$client = $this->clientService->newClient();
try {
$response = $client->post(
$url,
[
'body' => $fields,
'connect_timeout' => 10,
]
);
} catch (\Exception $e) {
return false;
}
$status = json_decode($response->getBody(), true);
return ($status['ocs']['meta']['statuscode'] === 100 || $status['ocs']['meta']['statuscode'] === 200);
}
/**
* try send accept message to ocm end-point
*
* @param string $remoteDomain
* @param string $token
* @param $remoteId id of the share
* @param string $feedback
* @return bool
*/
protected function tryOCMEndPoint($remoteDomain, $token, $remoteId, $feedback) {
switch ($feedback) {
case 'accept':
$notification = $this->cloudFederationFactory->getCloudFederationNotification();
$notification->setMessage(
'SHARE_ACCEPTED',
'file',
$remoteId,
[
'sharedSecret' => $token,
'message' => 'Recipient accept the share'
]
);
return $this->cloudFederationProviderManager->sendNotification($remoteDomain, $notification);
case 'decline':
$notification = $this->cloudFederationFactory->getCloudFederationNotification();
$notification->setMessage(
'SHARE_DECLINED',
'file',
$remoteId,
[
'sharedSecret' => $token,
'message' => 'Recipient declined the share'
]
);
return $this->cloudFederationProviderManager->sendNotification($remoteDomain, $notification);
}
return false;
}
/**
* remove '/user/files' from the path and trailing slashes
*
* @param string $path
* @return string
*/
protected function stripPath($path) {
$prefix = '/' . $this->uid . '/files';
return rtrim(substr($path, strlen($prefix)), '/');
}
public function getMount($data) {
$data['manager'] = $this;
$mountPoint = '/' . $this->uid . '/files' . $data['mountpoint'];
$data['mountpoint'] = $mountPoint;
$data['certificateManager'] = \OC::$server->getCertificateManager($this->uid);
return new Mount(self::STORAGE, $mountPoint, $data, $this, $this->storageLoader);
}
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/**
* @param array $data
* @return Mount
*/
protected function mountShare($data) {
$mount = $this->getMount($data);
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$this->mountManager->addMount($mount);
return $mount;
}
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/**
* @return \OC\Files\Mount\Manager
*/
public function getMountManager() {
return $this->mountManager;
}
/**
* @param string $source
* @param string $target
* @return bool
*/
public function setMountPoint($source, $target) {
$source = $this->stripPath($source);
$target = $this->stripPath($target);
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$sourceHash = md5($source);
$targetHash = md5($target);
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$query = $this->connection->prepare('
UPDATE `*PREFIX*share_external`
SET `mountpoint` = ?, `mountpoint_hash` = ?
WHERE `mountpoint_hash` = ?
AND `user` = ?
');
$result = (bool)$query->execute([$target, $targetHash, $sourceHash, $this->uid]);
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return $result;
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}
public function removeShare($mountPoint) {
$mountPointObj = $this->mountManager->find($mountPoint);
$id = $mountPointObj->getStorage()->getCache()->getId('');
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$mountPoint = $this->stripPath($mountPoint);
$hash = md5($mountPoint);
$getShare = $this->connection->prepare('
SELECT `remote`, `share_token`, `remote_id`, `share_type`, `id`
FROM `*PREFIX*share_external`
WHERE `mountpoint_hash` = ? AND `user` = ?');
$result = $getShare->execute([$hash, $this->uid]);
$share = $getShare->fetch();
$getShare->closeCursor();
if ($result && $share !== false && (int)$share['share_type'] === IShare::TYPE_USER) {
try {
$this->sendFeedbackToRemote($share['remote'], $share['share_token'], $share['remote_id'], 'decline');
} catch (\Throwable $e) {
// if we fail to notify the remote (probably cause the remote is down)
// we still want the share to be gone to prevent undeletable remotes
}
$query = $this->connection->prepare('
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DELETE FROM `*PREFIX*share_external`
WHERE `id` = ?
');
$result = (bool)$query->execute([(int)$share['id']]);
} elseif ($result && (int)$share['share_type'] === IShare::TYPE_GROUP) {
$query = $this->connection->prepare('
UPDATE `*PREFIX*share_external`
SET `accepted` = ?
WHERE `id` = ?');
$result = (bool)$query->execute([0, (int)$share['id']]);
}
if ($result) {
$this->removeReShares($id);
}
return $result;
}
/**
* remove re-shares from share table and mapping in the federated_reshares table
*
* @param $mountPointId
*/
protected function removeReShares($mountPointId) {
$selectQuery = $this->connection->getQueryBuilder();
$query = $this->connection->getQueryBuilder();
$selectQuery->select('id')->from('share')
->where($selectQuery->expr()->eq('file_source', $query->createNamedParameter($mountPointId)));
$select = $selectQuery->getSQL();
$query->delete('federated_reshares')
->where($query->expr()->in('share_id', $query->createFunction('(' . $select . ')')));
$query->execute();
$deleteReShares = $this->connection->getQueryBuilder();
$deleteReShares->delete('share')
->where($deleteReShares->expr()->eq('file_source', $deleteReShares->createNamedParameter($mountPointId)));
$deleteReShares->execute();
}
/**
* remove all shares for user $uid if the user was deleted
*
* @param string $uid
* @return bool
*/
public function removeUserShares($uid) {
$getShare = $this->connection->prepare('
SELECT `remote`, `share_token`, `remote_id`
FROM `*PREFIX*share_external`
WHERE `user` = ?');
$result = $getShare->execute([$uid]);
if ($result) {
$shares = $getShare->fetchAll();
foreach ($shares as $share) {
$this->sendFeedbackToRemote($share['remote'], $share['share_token'], $share['remote_id'], 'decline');
}
}
$query = $this->connection->prepare('
DELETE FROM `*PREFIX*share_external`
WHERE `user` = ?
');
return (bool)$query->execute([$uid]);
}
/**
* return a list of shares which are not yet accepted by the user
*
* @return array list of open server-to-server shares
*/
public function getOpenShares() {
return $this->getShares(false);
}
/**
* return a list of shares which are accepted by the user
*
* @return array list of accepted server-to-server shares
*/
public function getAcceptedShares() {
return $this->getShares(true);
}
/**
* return a list of shares for the user
*
* @param bool|null $accepted True for accepted only,
* false for not accepted,
* null for all shares of the user
* @return array list of open server-to-server shares
*/
private function getShares($accepted) {
$user = $this->userManager->get($this->uid);
$groups = $this->groupManager->getUserGroups($user);
$userGroups = [];
foreach ($groups as $group) {
$userGroups[] = $group->getGID();
}
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$query = 'SELECT `id`, `remote`, `remote_id`, `share_token`, `name`, `owner`, `user`, `mountpoint`, `accepted`
FROM `*PREFIX*share_external`
WHERE (`user` = ? OR `user` IN (?))';
$parameters = [$this->uid, implode(',',$userGroups)];
if (!is_null($accepted)) {
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$query .= ' AND `accepted` = ?';
$parameters[] = (int) $accepted;
}
$query .= ' ORDER BY `id` ASC';
$shares = $this->connection->prepare($query);
$result = $shares->execute($parameters);
return $result ? $shares->fetchAll() : [];
}
}