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<?php
namespace OCA\Files_Sharing;
class Helper {
public static function registerHooks() {
\OCP\Util::connectHook('OC_Filesystem', 'setup', '\OC\Files\Storage\Shared', 'setup');
\OCP\Util::connectHook('OC_Filesystem', 'setup', '\OCA\Files_Sharing\External\Manager', 'setup');
\OCP\Util::connectHook('OC_Filesystem', 'post_write', '\OC\Files\Cache\Shared_Updater', 'writeHook');
\OCP\Util::connectHook('OC_Filesystem', 'post_delete', '\OC\Files\Cache\Shared_Updater', 'postDeleteHook');
\OCP\Util::connectHook('OC_Filesystem', 'delete', '\OC\Files\Cache\Shared_Updater', 'deleteHook');
\OCP\Util::connectHook('OC_Filesystem', 'post_rename', '\OC\Files\Cache\Shared_Updater', 'renameHook');
\OCP\Util::connectHook('OC_Appconfig', 'post_set_value', '\OCA\Files\Share\Maintainer', 'configChangeHook');
\OCP\Util::connectHook('OCP\Share', 'post_shared', '\OC\Files\Cache\Shared_Updater', 'postShareHook');
\OCP\Util::connectHook('OCP\Share', 'post_unshare', '\OC\Files\Cache\Shared_Updater', 'postUnshareHook');
\OCP\Util::connectHook('OCP\Share', 'post_unshareFromSelf', '\OC\Files\Cache\Shared_Updater', 'postUnshareFromSelfHook');
\OCP\Util::connectHook('OC_User', 'post_deleteUser', '\OCA\Files_Sharing\Hooks', 'deleteUser');
}
/**
* Sets up the filesystem and user for public sharing
* @param string $token string share token
* @param string $relativePath optional path relative to the share
* @param string $password optional password
*/
public static function setupFromToken($token, $relativePath = null, $password = null) {
\OC_User::setIncognitoMode(true);
$linkItem = \OCP\Share::getShareByToken($token, !$password);
if($linkItem === false || ($linkItem['item_type'] !== 'file' && $linkItem['item_type'] !== 'folder')) {
\OC_Response::setStatus(404);
\OC_Log::write('core-preview', 'Passed token parameter is not valid', \OC_Log::DEBUG);
exit;
}
if(!isset($linkItem['uid_owner']) || !isset($linkItem['file_source'])) {
\OC_Response::setStatus(500);
\OC_Log::write('core-preview', 'Passed token seems to be valid, but it does not contain all necessary information . ("' . $token . '")', \OC_Log::WARN);
exit;
}
$rootLinkItem = \OCP\Share::resolveReShare($linkItem);
$path = null;
if (isset($rootLinkItem['uid_owner'])) {
\OCP\JSON::checkUserExists($rootLinkItem['uid_owner']);
\OC_Util::tearDownFS();
\OC_Util::setupFS($rootLinkItem['uid_owner']);
$path = \OC\Files\Filesystem::getPath($linkItem['file_source']);
}
if ($path === null) {
\OCP\Util::writeLog('share', 'could not resolve linkItem', \OCP\Util::DEBUG);
\OC_Response::setStatus(404);
\OCP\JSON::error(array('success' => false));
exit();
}
if (!isset($linkItem['item_type'])) {
\OCP\Util::writeLog('share', 'No item type set for share id: ' . $linkItem['id'], \OCP\Util::ERROR);
\OC_Response::setStatus(404);
\OCP\JSON::error(array('success' => false));
exit();
}
if (isset($linkItem['share_with']) && (int)$linkItem['share_type'] === \OCP\Share::SHARE_TYPE_LINK) {
if (!self::authenticate($linkItem, $password)) {
\OC_Response::setStatus(403);
\OCP\JSON::error(array('success' => false));
exit();
}
}
$basePath = $path;
if ($relativePath !== null && \OC\Files\Filesystem::isReadable($basePath . $relativePath)) {
$path .= \OC\Files\Filesystem::normalizePath($relativePath);
}
return array(
'linkItem' => $linkItem,
'basePath' => $basePath,
'realPath' => $path
);
}
/**
* Authenticate link item with the given password
* or with the session if no password was given.
* @param array $linkItem link item array
* @param string $password optional password
*
* @return boolean true if authorized, false otherwise
*/
public static function authenticate($linkItem, $password = null) {
if ($password !== null) {
if ($linkItem['share_type'] == \OCP\Share::SHARE_TYPE_LINK) {
// Check Password
$newHash = '';
if(\OC::$server->getHasher()->verify($password, $linkItem['share_with'], $newHash)) {
// Save item id in session for future requests
\OC::$server->getSession()->set('public_link_authenticated', $linkItem['id']);
/**
* FIXME: Migrate old hashes to new hash format
* Due to the fact that there is no reasonable functionality to update the password
* of an existing share no migration is yet performed there.
* The only possibility is to update the existing share which will result in a new
* share ID and is a major hack.
*
* In the future the migration should be performed once there is a proper method
* to update the share's password. (for example `$share->updatePassword($password)`
*
* @link https://github.com/owncloud/core/issues/10671
*/
if(!empty($newHash)) {
}
} else {
return false;
}
} else {
\OCP\Util::writeLog('share', 'Unknown share type '.$linkItem['share_type']
.' for share id '.$linkItem['id'], \OCP\Util::ERROR);
return false;
}
}
else {
// not authenticated ?
if ( ! \OC::$server->getSession()->exists('public_link_authenticated')
|| \OC::$server->getSession()->get('public_link_authenticated') !== $linkItem['id']) {
return false;
}
}
return true;
}
public static function getSharesFromItem($target) {
$result = array();
$owner = \OC\Files\Filesystem::getOwner($target);
\OC\Files\Filesystem::initMountPoints($owner);
$info = \OC\Files\Filesystem::getFileInfo($target);
$ownerView = new \OC\Files\View('/'.$owner.'/files');
if ( $owner != \OCP\User::getUser() ) {
$path = $ownerView->getPath($info['fileid']);
} else {
$path = $target;
}
$ids = array();
while ($path !== dirname($path)) {
$info = $ownerView->getFileInfo($path);
if ($info instanceof \OC\Files\FileInfo) {
$ids[] = $info['fileid'];
} else {
\OCP\Util::writeLog('sharing', 'No fileinfo available for: ' . $path, \OCP\Util::WARN);
}
$path = dirname($path);
}
if (!empty($ids)) {
$idList = array_chunk($ids, 99, true);
foreach ($idList as $subList) {
$statement = "SELECT `share_with`, `share_type`, `file_target` FROM `*PREFIX*share` WHERE `file_source` IN (" . implode(',', $subList) . ") AND `share_type` IN (0, 1, 2)";
$query = \OCP\DB::prepare($statement);
$r = $query->execute();
$result = array_merge($result, $r->fetchAll());
}
}
return $result;
}
public static function getUidAndFilename($filename) {
$uid = \OC\Files\Filesystem::getOwner($filename);
\OC\Files\Filesystem::initMountPoints($uid);
if ( $uid != \OCP\User::getUser() ) {
$info = \OC\Files\Filesystem::getFileInfo($filename);
$ownerView = new \OC\Files\View('/'.$uid.'/files');
$filename = $ownerView->getPath($info['fileid']);
}
return array($uid, $filename);
}
/**
* Format a path to be relative to the /user/files/ directory
* @param string $path the absolute path
* @return string e.g. turns '/admin/files/test.txt' into 'test.txt'
*/
public static function stripUserFilesPath($path) {
$trimmed = ltrim($path, '/');
$split = explode('/', $trimmed);
// it is not a file relative to data/user/files
if (count($split) < 3 || $split[1] !== 'files') {
return false;
}
$sliced = array_slice($split, 2);
$relPath = implode('/', $sliced);
return $relPath;
}
/**
* check if file name already exists and generate unique target
*
* @param string $path
* @param array $excludeList
* @param \OC\Files\View $view
* @return string $path
*/
public static function generateUniqueTarget($path, $excludeList, $view) {
$pathinfo = pathinfo($path);
$ext = (isset($pathinfo['extension'])) ? '.'.$pathinfo['extension'] : '';
$name = $pathinfo['filename'];
$dir = $pathinfo['dirname'];
$i = 2;
while ($view->file_exists($path) || in_array($path, $excludeList)) {
$path = \OC\Files\Filesystem::normalizePath($dir . '/' . $name . ' ('.$i.')' . $ext);
$i++;
}
return $path;
}
/**
* allow users from other ownCloud instances to mount public links share by this instance
* @return bool
*/
public static function isOutgoingServer2serverShareEnabled() {
$appConfig = \OC::$server->getAppConfig();
$result = $appConfig->getValue('files_sharing', 'outgoing_server2server_share_enabled', 'yes');
return ($result === 'yes') ? true : false;
}
/**
* allow user to mount public links from onther ownClouds
* @return bool
*/
public static function isIncomingServer2serverShareEnabled() {
$appConfig = \OC::$server->getAppConfig();
$result = $appConfig->getValue('files_sharing', 'incoming_server2server_share_enabled', 'yes');
return ($result === 'yes') ? true : false;
}
/**
* get default share folder
*
* @return string
*/
public static function getShareFolder() {
$shareFolder = \OC::$server->getConfig()->getSystemValue('share_folder', '/');
return \OC\Files\Filesystem::normalizePath($shareFolder);
}
/**
* set default share folder
*
* @param string $shareFolder
*/
public static function setShareFolder($shareFolder) {
\OC::$server->getConfig()->setSystemValue('share_folder', $shareFolder);
}
}
|
