nextcloud/apps/files_external/lib/config.php

946 lines
31 KiB
PHP

<?php
/**
* @author Bart Visscher <bartv@thisnet.nl>
* @author Bjoern Schiessle <schiessle@owncloud.com>
* @author Frank Karlitschek <frank@owncloud.org>
* @author Joas Schilling <nickvergessen@gmx.de>
* @author Jörn Friedrich Dreyer <jfd@butonic.de>
* @author Lukas Reschke <lukas@owncloud.com>
* @author Michael Gapczynski <gapczynskim@gmail.com>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Philipp Kapfer <philipp.kapfer@gmx.at>
* @author Robin Appelman <icewind@owncloud.com>
* @author Robin McCorkell <rmccorkell@karoshi.org.uk>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Vincent Petry <pvince81@owncloud.com>
*
* @copyright Copyright (c) 2015, ownCloud, Inc.
* @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/>
*
*/
class OC_Mount_Config {
// TODO: make this class non-static and give it a proper namespace
const MOUNT_TYPE_GLOBAL = 'global';
const MOUNT_TYPE_GROUP = 'group';
const MOUNT_TYPE_USER = 'user';
const MOUNT_TYPE_PERSONAL = 'personal';
// whether to skip backend test (for unit tests, as this static class is not mockable)
public static $skipTest = false;
private static $backends = array();
/**
* @param string $class
* @param array $definition
* @return bool
*/
public static function registerBackend($class, $definition) {
if (!isset($definition['backend'])) {
return false;
}
OC_Mount_Config::$backends[$class] = $definition;
return true;
}
/**
* Setup backends
*
* @return array of previously registered backends
*/
public static function setUp($backends = array()) {
$backup = self::$backends;
self::$backends = $backends;
return $backup;
}
/**
* Get details on each of the external storage backends, used for the mount config UI
* If a custom UI is needed, add the key 'custom' and a javascript file with that name will be loaded
* If the configuration parameter should be secret, add a '*' to the beginning of the value
* If the configuration parameter is a boolean, add a '!' to the beginning of the value
* If the configuration parameter is optional, add a '&' to the beginning of the value
* If the configuration parameter is hidden, add a '#' to the beginning of the value
*
* @return array
*/
public static function getBackends() {
$sortFunc = function ($a, $b) {
return strcasecmp($a['backend'], $b['backend']);
};
$backEnds = array();
foreach (OC_Mount_Config::$backends as $class => $backend) {
if (isset($backend['has_dependencies']) and $backend['has_dependencies'] === true) {
if (!method_exists($class, 'checkDependencies')) {
\OCP\Util::writeLog('files_external',
"Backend class $class has dependencies but doesn't provide method checkDependencies()",
\OCP\Util::DEBUG);
continue;
} elseif ($class::checkDependencies() !== true) {
continue;
}
}
$backEnds[$class] = $backend;
}
uasort($backEnds, $sortFunc);
return $backEnds;
}
/**
* Hook that mounts the given user's visible mount points
*
* @param array $data
*/
public static function initMountPointsHook($data) {
self::addStorageIdToConfig(null);
if ($data['user']) {
self::addStorageIdToConfig($data['user']);
$user = \OC::$server->getUserManager()->get($data['user']);
if (!$user) {
\OC_Log::write(
'files_external',
'Cannot init external mount points for non-existant user "' . $data['user'] . '".',
\OC_Log::WARN
);
return;
}
$userView = new \OC\Files\View('/' . $user->getUID() . '/files');
$changePropagator = new \OC\Files\Cache\ChangePropagator($userView);
$etagPropagator = new \OCA\Files_External\EtagPropagator($user, $changePropagator, \OC::$server->getConfig());
$etagPropagator->propagateDirtyMountPoints();
\OCP\Util::connectHook(
\OC\Files\Filesystem::CLASSNAME,
\OC\Files\Filesystem::signal_create_mount,
$etagPropagator, 'updateHook');
\OCP\Util::connectHook(
\OC\Files\Filesystem::CLASSNAME,
\OC\Files\Filesystem::signal_delete_mount,
$etagPropagator, 'updateHook');
}
}
/**
* Returns the mount points for the given user.
* The mount point is relative to the data directory.
*
* @param string $user user
* @return array of mount point string as key, mountpoint config as value
*/
public static function getAbsoluteMountPoints($user) {
$mountPoints = array();
$datadir = \OC_Config::getValue("datadirectory", \OC::$SERVERROOT . "/data");
$mount_file = \OC_Config::getValue("mount_file", $datadir . "/mount.json");
$backends = self::getBackends();
//move config file to it's new position
if (is_file(\OC::$SERVERROOT . '/config/mount.json')) {
rename(\OC::$SERVERROOT . '/config/mount.json', $mount_file);
}
// Load system mount points
$mountConfig = self::readData();
// Global mount points (is this redundant?)
if (isset($mountConfig[self::MOUNT_TYPE_GLOBAL])) {
foreach ($mountConfig[self::MOUNT_TYPE_GLOBAL] as $mountPoint => $options) {
$options['personal'] = false;
$options['options'] = self::decryptPasswords($options['options']);
if (!isset($options['priority'])) {
$options['priority'] = $backends[$options['class']]['priority'];
}
// Override if priority greater
if ((!isset($mountPoints[$mountPoint]))
|| ($options['priority'] >= $mountPoints[$mountPoint]['priority'])
) {
$options['priority_type'] = self::MOUNT_TYPE_GLOBAL;
$options['backend'] = $backends[$options['class']]['backend'];
$mountPoints[$mountPoint] = $options;
}
}
}
// All user mount points
if (isset($mountConfig[self::MOUNT_TYPE_USER]) && isset($mountConfig[self::MOUNT_TYPE_USER]['all'])) {
$mounts = $mountConfig[self::MOUNT_TYPE_USER]['all'];
foreach ($mounts as $mountPoint => $options) {
$mountPoint = self::setUserVars($user, $mountPoint);
foreach ($options as &$option) {
$option = self::setUserVars($user, $option);
}
$options['personal'] = false;
$options['options'] = self::decryptPasswords($options['options']);
if (!isset($options['priority'])) {
$options['priority'] = $backends[$options['class']]['priority'];
}
// Override if priority greater
if ((!isset($mountPoints[$mountPoint]))
|| ($options['priority'] >= $mountPoints[$mountPoint]['priority'])
) {
$options['priority_type'] = self::MOUNT_TYPE_GLOBAL;
$options['backend'] = $backends[$options['class']]['backend'];
$mountPoints[$mountPoint] = $options;
}
}
}
// Group mount points
if (isset($mountConfig[self::MOUNT_TYPE_GROUP])) {
foreach ($mountConfig[self::MOUNT_TYPE_GROUP] as $group => $mounts) {
if (\OC_Group::inGroup($user, $group)) {
foreach ($mounts as $mountPoint => $options) {
$mountPoint = self::setUserVars($user, $mountPoint);
foreach ($options as &$option) {
$option = self::setUserVars($user, $option);
}
$options['personal'] = false;
$options['options'] = self::decryptPasswords($options['options']);
if (!isset($options['priority'])) {
$options['priority'] = $backends[$options['class']]['priority'];
}
// Override if priority greater or if priority type different
if ((!isset($mountPoints[$mountPoint]))
|| ($options['priority'] >= $mountPoints[$mountPoint]['priority'])
|| ($mountPoints[$mountPoint]['priority_type'] !== self::MOUNT_TYPE_GROUP)
) {
$options['priority_type'] = self::MOUNT_TYPE_GROUP;
$options['backend'] = $backends[$options['class']]['backend'];
$mountPoints[$mountPoint] = $options;
}
}
}
}
}
// User mount points
if (isset($mountConfig[self::MOUNT_TYPE_USER])) {
foreach ($mountConfig[self::MOUNT_TYPE_USER] as $mountUser => $mounts) {
if (strtolower($mountUser) === strtolower($user)) {
foreach ($mounts as $mountPoint => $options) {
$mountPoint = self::setUserVars($user, $mountPoint);
foreach ($options as &$option) {
$option = self::setUserVars($user, $option);
}
$options['personal'] = false;
$options['options'] = self::decryptPasswords($options['options']);
if (!isset($options['priority'])) {
$options['priority'] = $backends[$options['class']]['priority'];
}
// Override if priority greater or if priority type different
if ((!isset($mountPoints[$mountPoint]))
|| ($options['priority'] >= $mountPoints[$mountPoint]['priority'])
|| ($mountPoints[$mountPoint]['priority_type'] !== self::MOUNT_TYPE_USER)
) {
$options['priority_type'] = self::MOUNT_TYPE_USER;
$options['backend'] = $backends[$options['class']]['backend'];
$mountPoints[$mountPoint] = $options;
}
}
}
}
}
$personalBackends = self::getPersonalBackends();
// Load personal mount points
$mountConfig = self::readData($user);
if (isset($mountConfig[self::MOUNT_TYPE_USER][$user])) {
foreach ($mountConfig[self::MOUNT_TYPE_USER][$user] as $mountPoint => $options) {
if (isset($personalBackends[$options['class']])) {
$options['personal'] = true;
$options['options'] = self::decryptPasswords($options['options']);
// Always override previous config
$options['priority_type'] = self::MOUNT_TYPE_PERSONAL;
$options['backend'] = $backends[$options['class']]['backend'];
$mountPoints[$mountPoint] = $options;
}
}
}
return $mountPoints;
}
/**
* fill in the correct values for $user
*
* @param string $user
* @param string $input
* @return string
*/
private static function setUserVars($user, $input) {
return str_replace('$user', $user, $input);
}
/**
* Get details on each of the external storage backends, used for the mount config UI
* Some backends are not available as a personal backend, f.e. Local and such that have
* been disabled by the admin.
*
* If a custom UI is needed, add the key 'custom' and a javascript file with that name will be loaded
* If the configuration parameter should be secret, add a '*' to the beginning of the value
* If the configuration parameter is a boolean, add a '!' to the beginning of the value
* If the configuration parameter is optional, add a '&' to the beginning of the value
* If the configuration parameter is hidden, add a '#' to the beginning of the value
*
* @return array
*/
public static function getPersonalBackends() {
// Check whether the user has permissions to add personal storage backends
// return an empty array if this is not the case
if (OCP\Config::getAppValue('files_external', 'allow_user_mounting', 'yes') !== 'yes') {
return array();
}
$backEnds = self::getBackends();
// Remove local storage and other disabled storages
unset($backEnds['\OC\Files\Storage\Local']);
$allowedBackEnds = explode(',', OCP\Config::getAppValue('files_external', 'user_mounting_backends', ''));
foreach ($backEnds as $backend => $null) {
if (!in_array($backend, $allowedBackEnds)) {
unset($backEnds[$backend]);
}
}
return $backEnds;
}
/**
* Get the system mount points
* The returned array is not in the same format as getUserMountPoints()
*
* @return array
*/
public static function getSystemMountPoints() {
$mountPoints = self::readData();
$backends = self::getBackends();
$system = array();
if (isset($mountPoints[self::MOUNT_TYPE_GROUP])) {
foreach ($mountPoints[self::MOUNT_TYPE_GROUP] as $group => $mounts) {
foreach ($mounts as $mountPoint => $mount) {
// Update old classes to new namespace
if (strpos($mount['class'], 'OC_Filestorage_') !== false) {
$mount['class'] = '\OC\Files\Storage\\' . substr($mount['class'], 15);
}
$mount['options'] = self::decryptPasswords($mount['options']);
if (!isset($mount['priority'])) {
$mount['priority'] = $backends[$mount['class']]['priority'];
}
// Remove '/$user/files/' from mount point
$mountPoint = substr($mountPoint, 13);
$config = array(
'class' => $mount['class'],
'mountpoint' => $mountPoint,
'backend' => $backends[$mount['class']]['backend'],
'priority' => $mount['priority'],
'options' => $mount['options'],
'applicable' => array('groups' => array($group), 'users' => array()),
'status' => self::getBackendStatus($mount['class'], $mount['options'], false)
);
$hash = self::makeConfigHash($config);
// If an existing config exists (with same class, mountpoint and options)
if (isset($system[$hash])) {
// add the groups into that config
$system[$hash]['applicable']['groups']
= array_merge($system[$hash]['applicable']['groups'], array($group));
} else {
$system[$hash] = $config;
}
}
}
}
if (isset($mountPoints[self::MOUNT_TYPE_USER])) {
foreach ($mountPoints[self::MOUNT_TYPE_USER] as $user => $mounts) {
foreach ($mounts as $mountPoint => $mount) {
// Update old classes to new namespace
if (strpos($mount['class'], 'OC_Filestorage_') !== false) {
$mount['class'] = '\OC\Files\Storage\\' . substr($mount['class'], 15);
}
$mount['options'] = self::decryptPasswords($mount['options']);
if (!isset($mount['priority'])) {
$mount['priority'] = $backends[$mount['class']]['priority'];
}
// Remove '/$user/files/' from mount point
$mountPoint = substr($mountPoint, 13);
$config = array(
'class' => $mount['class'],
'mountpoint' => $mountPoint,
'backend' => $backends[$mount['class']]['backend'],
'priority' => $mount['priority'],
'options' => $mount['options'],
'applicable' => array('groups' => array(), 'users' => array($user)),
'status' => self::getBackendStatus($mount['class'], $mount['options'], false)
);
$hash = self::makeConfigHash($config);
// If an existing config exists (with same class, mountpoint and options)
if (isset($system[$hash])) {
// add the users into that config
$system[$hash]['applicable']['users']
= array_merge($system[$hash]['applicable']['users'], array($user));
} else {
$system[$hash] = $config;
}
}
}
}
return array_values($system);
}
/**
* Get the personal mount points of the current user
* The returned array is not in the same format as getUserMountPoints()
*
* @return array
*/
public static function getPersonalMountPoints() {
$mountPoints = self::readData(OCP\User::getUser());
$backEnds = self::getBackends();
$uid = OCP\User::getUser();
$personal = array();
if (isset($mountPoints[self::MOUNT_TYPE_USER][$uid])) {
foreach ($mountPoints[self::MOUNT_TYPE_USER][$uid] as $mountPoint => $mount) {
// Update old classes to new namespace
if (strpos($mount['class'], 'OC_Filestorage_') !== false) {
$mount['class'] = '\OC\Files\Storage\\' . substr($mount['class'], 15);
}
$mount['options'] = self::decryptPasswords($mount['options']);
$personal[] = array(
'class' => $mount['class'],
// Remove '/uid/files/' from mount point
'mountpoint' => substr($mountPoint, strlen($uid) + 8),
'backend' => $backEnds[$mount['class']]['backend'],
'options' => $mount['options'],
'status' => self::getBackendStatus($mount['class'], $mount['options'], true)
);
}
}
return $personal;
}
/**
* Test connecting using the given backend configuration
*
* @param string $class backend class name
* @param array $options backend configuration options
* @return bool true if the connection succeeded, false otherwise
*/
private static function getBackendStatus($class, $options, $isPersonal) {
if (self::$skipTest) {
return true;
}
foreach ($options as &$option) {
$option = self::setUserVars(OCP\User::getUser(), $option);
}
if (class_exists($class)) {
try {
$storage = new $class($options);
return $storage->test($isPersonal);
} catch (Exception $exception) {
\OCP\Util::logException('files_external', $exception);
return false;
}
}
return false;
}
/**
* Add a mount point to the filesystem
*
* @param string $mountPoint Mount point
* @param string $class Backend class
* @param array $classOptions Backend parameters for the class
* @param string $mountType MOUNT_TYPE_GROUP | MOUNT_TYPE_USER
* @param string $applicable User or group to apply mount to
* @param bool $isPersonal Personal or system mount point i.e. is this being called from the personal or admin page
* @param int|null $priority Mount point priority, null for default
* @return boolean
*/
public static function addMountPoint($mountPoint,
$class,
$classOptions,
$mountType,
$applicable,
$isPersonal = false,
$priority = null) {
$backends = self::getBackends();
$mountPoint = OC\Files\Filesystem::normalizePath($mountPoint);
$relMountPoint = $mountPoint;
if ($mountPoint === '' || $mountPoint === '/') {
// can't mount at root folder
return false;
}
if (!isset($backends[$class])) {
// invalid backend
return false;
}
if ($isPersonal) {
// Verify that the mount point applies for the current user
// Prevent non-admin users from mounting local storage and other disabled backends
$allowed_backends = self::getPersonalBackends();
if ($applicable != OCP\User::getUser() || !isset($allowed_backends[$class])) {
return false;
}
$mountPoint = '/' . $applicable . '/files/' . ltrim($mountPoint, '/');
} else {
$mountPoint = '/$user/files/' . ltrim($mountPoint, '/');
}
$mount = array($applicable => array(
$mountPoint => array(
'class' => $class,
'options' => self::encryptPasswords($classOptions))
)
);
if (!$isPersonal && !is_null($priority)) {
$mount[$applicable][$mountPoint]['priority'] = $priority;
}
$mountPoints = self::readData($isPersonal ? OCP\User::getUser() : null);
// who else loves multi-dimensional array ?
$isNew = !isset($mountPoints[$mountType]) ||
!isset($mountPoints[$mountType][$applicable]) ||
!isset($mountPoints[$mountType][$applicable][$mountPoint]);
$mountPoints = self::mergeMountPoints($mountPoints, $mount, $mountType);
// Set default priority if none set
if (!isset($mountPoints[$mountType][$applicable][$mountPoint]['priority'])) {
if (isset($backends[$class]['priority'])) {
$mountPoints[$mountType][$applicable][$mountPoint]['priority']
= $backends[$class]['priority'];
} else {
$mountPoints[$mountType][$applicable][$mountPoint]['priority']
= 100;
}
}
self::writeData($isPersonal ? OCP\User::getUser() : null, $mountPoints);
$result = self::getBackendStatus($class, $classOptions, $isPersonal);
if ($result && $isNew) {
\OC_Hook::emit(
\OC\Files\Filesystem::CLASSNAME,
\OC\Files\Filesystem::signal_create_mount,
array(
\OC\Files\Filesystem::signal_param_path => $relMountPoint,
\OC\Files\Filesystem::signal_param_mount_type => $mountType,
\OC\Files\Filesystem::signal_param_users => $applicable,
)
);
}
return $result;
}
/**
*
* @param string $mountPoint Mount point
* @param string $mountType MOUNT_TYPE_GROUP | MOUNT_TYPE_USER
* @param string $applicable User or group to remove mount from
* @param bool $isPersonal Personal or system mount point
* @return bool
*/
public static function removeMountPoint($mountPoint, $mountType, $applicable, $isPersonal = false) {
// Verify that the mount point applies for the current user
$relMountPoints = $mountPoint;
if ($isPersonal) {
if ($applicable != OCP\User::getUser()) {
return false;
}
$mountPoint = '/' . $applicable . '/files/' . ltrim($mountPoint, '/');
} else {
$mountPoint = '/$user/files/' . ltrim($mountPoint, '/');
}
$mountPoint = \OC\Files\Filesystem::normalizePath($mountPoint);
$mountPoints = self::readData($isPersonal ? OCP\User::getUser() : null);
// Remove mount point
unset($mountPoints[$mountType][$applicable][$mountPoint]);
// Unset parent arrays if empty
if (empty($mountPoints[$mountType][$applicable])) {
unset($mountPoints[$mountType][$applicable]);
if (empty($mountPoints[$mountType])) {
unset($mountPoints[$mountType]);
}
}
self::writeData($isPersonal ? OCP\User::getUser() : null, $mountPoints);
\OC_Hook::emit(
\OC\Files\Filesystem::CLASSNAME,
\OC\Files\Filesystem::signal_delete_mount,
array(
\OC\Files\Filesystem::signal_param_path => $relMountPoints,
\OC\Files\Filesystem::signal_param_mount_type => $mountType,
\OC\Files\Filesystem::signal_param_users => $applicable,
)
);
return true;
}
/**
*
* @param string $mountPoint Mount point
* @param string $target The new mount point
* @param string $mountType MOUNT_TYPE_GROUP | MOUNT_TYPE_USER
* @return bool
*/
public static function movePersonalMountPoint($mountPoint, $target, $mountType) {
$mountPoint = rtrim($mountPoint, '/');
$user = OCP\User::getUser();
$mountPoints = self::readData($user);
if (!isset($mountPoints[$mountType][$user][$mountPoint])) {
return false;
}
$mountPoints[$mountType][$user][$target] = $mountPoints[$mountType][$user][$mountPoint];
// Remove old mount point
unset($mountPoints[$mountType][$user][$mountPoint]);
self::writeData($user, $mountPoints);
return true;
}
/**
* Read the mount points in the config file into an array
*
* @param string|null $user If not null, personal for $user, otherwise system
* @return array
*/
private static function readData($user = null) {
$parser = new \OC\ArrayParser();
if (isset($user)) {
$phpFile = OC_User::getHome($user) . '/mount.php';
$jsonFile = OC_User::getHome($user) . '/mount.json';
} else {
$phpFile = OC::$SERVERROOT . '/config/mount.php';
$datadir = \OC_Config::getValue('datadirectory', \OC::$SERVERROOT . '/data/');
$jsonFile = \OC_Config::getValue('mount_file', $datadir . '/mount.json');
}
if (is_file($jsonFile)) {
$mountPoints = json_decode(file_get_contents($jsonFile), true);
if (is_array($mountPoints)) {
return $mountPoints;
}
} elseif (is_file($phpFile)) {
$mountPoints = $parser->parsePHP(file_get_contents($phpFile));
if (is_array($mountPoints)) {
return $mountPoints;
}
}
return array();
}
/**
* Write the mount points to the config file
*
* @param string|null $user If not null, personal for $user, otherwise system
* @param array $data Mount points
*/
private static function writeData($user, $data) {
if (isset($user)) {
$file = OC_User::getHome($user) . '/mount.json';
} else {
$datadir = \OC_Config::getValue('datadirectory', \OC::$SERVERROOT . '/data/');
$file = \OC_Config::getValue('mount_file', $datadir . '/mount.json');
}
foreach ($data as &$applicables) {
foreach ($applicables as &$mountPoints) {
foreach ($mountPoints as &$options) {
self::addStorageId($options);
}
}
}
$content = json_encode($data, JSON_PRETTY_PRINT);
@file_put_contents($file, $content);
@chmod($file, 0640);
}
/**
* check dependencies
*/
public static function checkDependencies() {
$dependencies = array();
foreach (OC_Mount_Config::$backends as $class => $backend) {
if (isset($backend['has_dependencies']) and $backend['has_dependencies'] === true) {
$result = $class::checkDependencies();
if ($result !== true) {
if (!is_array($result)) {
$result = array($result);
}
foreach ($result as $key => $value) {
if (is_numeric($key)) {
OC_Mount_Config::addDependency($dependencies, $value, $backend['backend']);
} else {
OC_Mount_Config::addDependency($dependencies, $key, $backend['backend'], $value);
}
}
}
}
}
if (count($dependencies) > 0) {
return OC_Mount_Config::generateDependencyMessage($dependencies);
}
return '';
}
private static function addDependency(&$dependencies, $module, $backend, $message = null) {
if (!isset($dependencies[$module])) {
$dependencies[$module] = array();
}
if ($message === null) {
$dependencies[$module][] = $backend;
} else {
$dependencies[$module][] = array('backend' => $backend, 'message' => $message);
}
}
private static function generateDependencyMessage($dependencies) {
$l = new \OC_L10N('files_external');
$dependencyMessage = '';
foreach ($dependencies as $module => $backends) {
$dependencyGroup = array();
foreach ($backends as $backend) {
if (is_array($backend)) {
$dependencyMessage .= '<br />' . $l->t('<b>Note:</b> ') . $backend['message'];
} else {
$dependencyGroup[] = $backend;
}
}
$dependencyGroupCount = count($dependencyGroup);
if ($dependencyGroupCount > 0) {
$backends = '';
for ($i = 0; $i < $dependencyGroupCount; $i++) {
if ($i > 0 && $i === $dependencyGroupCount - 1) {
$backends .= ' ' . $l->t('and') . ' ';
} elseif ($i > 0) {
$backends .= ', ';
}
$backends .= '<i>' . $dependencyGroup[$i] . '</i>';
}
$dependencyMessage .= '<br />' . OC_Mount_Config::getSingleDependencyMessage($l, $module, $backends);
}
}
return $dependencyMessage;
}
/**
* Returns a dependency missing message
*
* @param OC_L10N $l
* @param string $module
* @param string $backend
* @return string
*/
private static function getSingleDependencyMessage(OC_L10N $l, $module, $backend) {
switch (strtolower($module)) {
case 'curl':
return $l->t('<b>Note:</b> The cURL support in PHP is not enabled or installed. Mounting of %s is not possible. Please ask your system administrator to install it.', $backend);
case 'ftp':
return $l->t('<b>Note:</b> The FTP support in PHP is not enabled or installed. Mounting of %s is not possible. Please ask your system administrator to install it.', $backend);
default:
return $l->t('<b>Note:</b> "%s" is not installed. Mounting of %s is not possible. Please ask your system administrator to install it.', array($module, $backend));
}
}
/**
* Encrypt passwords in the given config options
*
* @param array $options mount options
* @return array updated options
*/
private static function encryptPasswords($options) {
if (isset($options['password'])) {
$options['password_encrypted'] = self::encryptPassword($options['password']);
// do not unset the password, we want to keep the keys order
// on load... because that's how the UI currently works
$options['password'] = '';
}
return $options;
}
/**
* Decrypt passwords in the given config options
*
* @param array $options mount options
* @return array updated options
*/
private static function decryptPasswords($options) {
// note: legacy options might still have the unencrypted password in the "password" field
if (isset($options['password_encrypted'])) {
$options['password'] = self::decryptPassword($options['password_encrypted']);
unset($options['password_encrypted']);
}
return $options;
}
/**
* Encrypt a single password
*
* @param string $password plain text password
* @return string encrypted password
*/
private static function encryptPassword($password) {
$cipher = self::getCipher();
$iv = \OCP\Util::generateRandomBytes(16);
$cipher->setIV($iv);
return base64_encode($iv . $cipher->encrypt($password));
}
/**
* Decrypts a single password
*
* @param string $encryptedPassword encrypted password
* @return string plain text password
*/
private static function decryptPassword($encryptedPassword) {
$cipher = self::getCipher();
$binaryPassword = base64_decode($encryptedPassword);
$iv = substr($binaryPassword, 0, 16);
$cipher->setIV($iv);
$binaryPassword = substr($binaryPassword, 16);
return $cipher->decrypt($binaryPassword);
}
/**
* Merges mount points
*
* @param array $data Existing mount points
* @param array $mountPoint New mount point
* @param string $mountType
* @return array
*/
private static function mergeMountPoints($data, $mountPoint, $mountType) {
$applicable = key($mountPoint);
$mountPath = key($mountPoint[$applicable]);
if (isset($data[$mountType])) {
if (isset($data[$mountType][$applicable])) {
// Merge priorities
if (isset($data[$mountType][$applicable][$mountPath])
&& isset($data[$mountType][$applicable][$mountPath]['priority'])
&& !isset($mountPoint[$applicable][$mountPath]['priority'])
) {
$mountPoint[$applicable][$mountPath]['priority']
= $data[$mountType][$applicable][$mountPath]['priority'];
}
$data[$mountType][$applicable]
= array_merge($data[$mountType][$applicable], $mountPoint[$applicable]);
} else {
$data[$mountType] = array_merge($data[$mountType], $mountPoint);
}
} else {
$data[$mountType] = $mountPoint;
}
return $data;
}
/**
* Returns the encryption cipher
*/
private static function getCipher() {
if (!class_exists('Crypt_AES', false)) {
include('Crypt/AES.php');
}
$cipher = new Crypt_AES(CRYPT_AES_MODE_CBC);
$cipher->setKey(\OC::$server->getConfig()->getSystemValue('passwordsalt', null));
return $cipher;
}
/**
* Computes a hash based on the given configuration.
* This is mostly used to find out whether configurations
* are the same.
*/
private static function makeConfigHash($config) {
$data = json_encode(
array(
'c' => $config['class'],
'm' => $config['mountpoint'],
'o' => $config['options']
)
);
return hash('md5', $data);
}
/**
* Add storage id to the storage configurations that did not have any.
*
* @param string $user user for which to process storage configs
*/
private static function addStorageIdToConfig($user) {
$config = self::readData($user);
$needUpdate = false;
foreach ($config as &$applicables) {
foreach ($applicables as &$mountPoints) {
foreach ($mountPoints as &$options) {
$needUpdate |= !isset($options['storage_id']);
}
}
}
if ($needUpdate) {
self::writeData($user, $config);
}
}
/**
* Get storage id from the numeric storage id and set
* it into the given options argument. Only do this
* if there was no storage id set yet.
*
* This might also fail if a storage wasn't fully configured yet
* and couldn't be mounted, in which case this will simply return false.
*
* @param array $options storage options
*
* @return bool true if the storage id was added, false otherwise
*/
private static function addStorageId(&$options) {
if (isset($options['storage_id'])) {
return false;
}
$class = $options['class'];
try {
/** @var \OC\Files\Storage\Storage $storage */
$storage = new $class($options['options']);
// TODO: introduce StorageConfigException
} catch (\Exception $e) {
// storage might not be fully configured yet (ex: Dropbox)
// note that storage instances aren't supposed to open any connections
// in the constructor, so this exception is likely to be a config exception
return false;
}
$options['storage_id'] = $storage->getCache()->getNumericStorageId();
return true;
}
}