nextcloud / server

apps/files_external/lib/config.php

Indentation +383 added lines, -383 removed lines

@@ -58,387 +58,387 @@
  * Class to configure mount.json globally and for users
  */
 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;
-
-	/** @var Application */
-	public static $app;
-
-	/**
-	 * @param string $class
-	 * @param array $definition
-	 * @return bool
-	 * @deprecated 8.2.0 use \OCA\Files_External\Service\BackendService::registerBackend()
-	 */
-	public static function registerBackend($class, $definition) {
-		$backendService = self::$app->getContainer()->query(BackendService::class);
-		$auth = self::$app->getContainer()->query(Builtin::class);
-
-		$backendService->registerBackend(new LegacyBackend($class, $definition, $auth));
-
-		return true;
-	}
-
-	/**
-	 * Returns the mount points for the given user.
-	 * The mount point is relative to the data directory.
-	 *
-	 * @param string $uid user
-	 * @return array of mount point string as key, mountpoint config as value
-	 *
-	 * @deprecated 8.2.0 use UserGlobalStoragesService::getStorages() and UserStoragesService::getStorages()
-	 */
-	public static function getAbsoluteMountPoints($uid) {
-		$mountPoints = array();
-
-		$userGlobalStoragesService = self::$app->getContainer()->query(UserGlobalStoragesService::class);
-		$userStoragesService = self::$app->getContainer()->query(UserStoragesService::class);
-		$user = self::$app->getContainer()->query(IUserManager::class)->get($uid);
-
-		$userGlobalStoragesService->setUser($user);
-		$userStoragesService->setUser($user);
-
-		foreach ($userGlobalStoragesService->getStorages() as $storage) {
-			/** @var \OCA\Files_External\Lib\StorageConfig $storage */
-			$mountPoint = '/'.$uid.'/files'.$storage->getMountPoint();
-			$mountEntry = self::prepareMountPointEntry($storage, false);
-			foreach ($mountEntry['options'] as &$option) {
-				$option = self::substitutePlaceholdersInConfig($option, $uid);
-			}
-			$mountPoints[$mountPoint] = $mountEntry;
-		}
-
-		foreach ($userStoragesService->getStorages() as $storage) {
-			$mountPoint = '/'.$uid.'/files'.$storage->getMountPoint();
-			$mountEntry = self::prepareMountPointEntry($storage, true);
-			foreach ($mountEntry['options'] as &$option) {
-				$option = self::substitutePlaceholdersInConfig($option, $uid);
-			}
-			$mountPoints[$mountPoint] = $mountEntry;
-		}
-
-		$userGlobalStoragesService->resetUser();
-		$userStoragesService->resetUser();
-
-		return $mountPoints;
-	}
-
-	/**
-	 * Get the system mount points
-	 *
-	 * @return array
-	 *
-	 * @deprecated 8.2.0 use GlobalStoragesService::getStorages()
-	 */
-	public static function getSystemMountPoints() {
-		$mountPoints = [];
-		$service = self::$app->getContainer()->query(GlobalStoragesService::class);
-
-		foreach ($service->getStorages() as $storage) {
-			$mountPoints[] = self::prepareMountPointEntry($storage, false);
-		}
-
-		return $mountPoints;
-	}
-
-	/**
-	 * Get the personal mount points of the current user
-	 *
-	 * @return array
-	 *
-	 * @deprecated 8.2.0 use UserStoragesService::getStorages()
-	 */
-	public static function getPersonalMountPoints() {
-		$mountPoints = [];
-		$service = self::$app->getContainer()->query(UserStoragesService::class);
-
-		foreach ($service->getStorages() as $storage) {
-			$mountPoints[] = self::prepareMountPointEntry($storage, true);
-		}
-
-		return $mountPoints;
-	}
-
-	/**
-	 * Convert a StorageConfig to the legacy mountPoints array format
-	 * There's a lot of extra information in here, to satisfy all of the legacy functions
-	 *
-	 * @param StorageConfig $storage
-	 * @param bool $isPersonal
-	 * @return array
-	 */
-	private static function prepareMountPointEntry(StorageConfig $storage, $isPersonal) {
-		$mountEntry = [];
-
-		$mountEntry['mountpoint'] = substr($storage->getMountPoint(), 1); // remove leading slash
-		$mountEntry['class'] = $storage->getBackend()->getIdentifier();
-		$mountEntry['backend'] = $storage->getBackend()->getText();
-		$mountEntry['authMechanism'] = $storage->getAuthMechanism()->getIdentifier();
-		$mountEntry['personal'] = $isPersonal;
-		$mountEntry['options'] = self::decryptPasswords($storage->getBackendOptions());
-		$mountEntry['mountOptions'] = $storage->getMountOptions();
-		$mountEntry['priority'] = $storage->getPriority();
-		$mountEntry['applicable'] = [
-			'groups' => $storage->getApplicableGroups(),
-			'users' => $storage->getApplicableUsers(),
-		];
-		// if mountpoint is applicable to all users the old API expects ['all']
-		if (empty($mountEntry['applicable']['groups']) && empty($mountEntry['applicable']['users'])) {
-			$mountEntry['applicable']['users'] = ['all'];
-		}
-
-		$mountEntry['id'] = $storage->getId();
-
-		return $mountEntry;
-	}
-
-	/**
-	 * fill in the correct values for $user
-	 *
-	 * @param string $user user value
-	 * @param string|array $input
-	 * @return string
-	 * @deprecated use self::substitutePlaceholdersInConfig($input)
-	 */
-	public static function setUserVars($user, $input) {
-		$handler = self::$app->getContainer()->query(UserPlaceholderHandler::class);
-		return $handler->handle($input);
-	}
-
-	/**
-	 * @param mixed $input
-	 * @param string|null $userId
-	 * @return mixed
-	 * @throws \OCP\AppFramework\QueryException
-	 * @since 16.0.0
-	 */
-	public static function substitutePlaceholdersInConfig($input, string $userId = null) {
-		/** @var BackendService $backendService */
-		$backendService = self::$app->getContainer()->query(BackendService::class);
-		/** @var IConfigHandler[] $handlers */
-		$handlers = $backendService->getConfigHandlers();
-		foreach ($handlers as $handler) {
-			if ($handler instanceof UserContext && $userId !== null) {
-				$handler->setUserId($userId);
-			}
-			$input = $handler->handle($input);
-		}
-		return $input;
-	}
-
-	/**
-	 * Test connecting using the given backend configuration
-	 *
-	 * @param string $class backend class name
-	 * @param array $options backend configuration options
-	 * @param boolean $isPersonal
-	 * @return int see self::STATUS_*
-	 * @throws Exception
-	 */
-	public static function getBackendStatus($class, $options, $isPersonal, $testOnly = true) {
-		if (self::$skipTest) {
-			return StorageNotAvailableException::STATUS_SUCCESS;
-		}
-		foreach ($options as $key => &$option) {
-			if($key === 'password') {
-				// no replacements in passwords
-				continue;
-			}
-			$option = self::substitutePlaceholdersInConfig($option);
-		}
-		if (class_exists($class)) {
-			try {
-				/** @var \OC\Files\Storage\Common $storage */
-				$storage = new $class($options);
-
-				try {
-					$result = $storage->test($isPersonal, $testOnly);
-					$storage->setAvailability($result);
-					if ($result) {
-						return StorageNotAvailableException::STATUS_SUCCESS;
-					}
-				} catch (\Exception $e) {
-					$storage->setAvailability(false);
-					throw $e;
-				}
-			} catch (Exception $exception) {
-				\OC::$server->getLogger()->logException($exception, ['app' => 'files_external']);
-				throw $exception;
-			}
-		}
-		return StorageNotAvailableException::STATUS_ERROR;
-	}
-
-	/**
-	 * Read the mount points in the config file into an array
-	 *
-	 * @param string|null $user If not null, personal for $user, otherwise system
-	 * @return array
-	 */
-	public static function readData($user = null) {
-		if (isset($user)) {
-			$jsonFile = \OC::$server->getUserManager()->get($user)->getHome() . '/mount.json';
-		} else {
-			$config = \OC::$server->getConfig();
-			$datadir = $config->getSystemValue('datadirectory', \OC::$SERVERROOT . '/data/');
-			$jsonFile = $config->getSystemValue('mount_file', $datadir . '/mount.json');
-		}
-		if (is_file($jsonFile)) {
-			$mountPoints = json_decode(file_get_contents($jsonFile), true);
-			if (is_array($mountPoints)) {
-				return $mountPoints;
-			}
-		}
-		return array();
-	}
-
-	/**
-	 * Get backend dependency message
-	 * TODO: move into AppFramework along with templates
-	 *
-	 * @param Backend[] $backends
-	 * @return string
-	 */
-	public static function dependencyMessage($backends) {
-		$l = \OC::$server->getL10N('files_external');
-		$message = '';
-		$dependencyGroups = [];
-
-		foreach ($backends as $backend) {
-			foreach ($backend->checkDependencies() as $dependency) {
-				if ($message = $dependency->getMessage()) {
-					$message .= '<p>' . $message . '</p>';
-				} else {
-					$dependencyGroups[$dependency->getDependency()][] = $backend;
-				}
-			}
-		}
-
-		foreach ($dependencyGroups as $module => $dependants) {
-			$backends = implode(', ', array_map(function($backend) {
-				return '"' . $backend->getText() . '"';
-			}, $dependants));
-			$message .= '<p>' . OC_Mount_Config::getSingleDependencyMessage($l, $module, $backends) . '</p>';
-		}
-
-		return $message;
-	}
-
-	/**
-	 * Returns a dependency missing message
-	 *
-	 * @param \OCP\IL10N $l
-	 * @param string $module
-	 * @param string $backend
-	 * @return string
-	 */
-	private static function getSingleDependencyMessage(\OCP\IL10N $l, $module, $backend) {
-		switch (strtolower($module)) {
-			case 'curl':
-				return (string)$l->t('The cURL support in PHP is not enabled or installed. Mounting of %s is not possible. Please ask your system administrator to install it.', [$backend]);
-			case 'ftp':
-				return (string)$l->t('The FTP support in PHP is not enabled or installed. Mounting of %s is not possible. Please ask your system administrator to install it.', [$backend]);
-			default:
-				return (string)$l->t('"%1$s" is not installed. Mounting of %2$s is not possible. Please ask your system administrator to install it.', [$module, $backend]);
-		}
-	}
-
-	/**
-	 * Encrypt passwords in the given config options
-	 *
-	 * @param array $options mount options
-	 * @return array updated options
-	 */
-	public static function encryptPasswords($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 $options mount options
-	 * @return array updated options
-	 */
-	public static function decryptPasswords($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();
-		$iv = \OC::$server->getSecureRandom()->generate(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);
-	}
-
-	/**
-	 * Returns the encryption cipher
-	 *
-	 * @return AES
-	 */
-	private static function getCipher() {
-		$cipher = new AES(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.
-	 *
-	 * @param array $config
-	 * @return string
-	 */
-	public static function makeConfigHash($config) {
-		$data = json_encode(
-			array(
-				'c' => $config['backend'],
-				'a' => $config['authMechanism'],
-				'm' => $config['mountpoint'],
-				'o' => $config['options'],
-				'p' => isset($config['priority']) ? $config['priority'] : -1,
-				'mo' => isset($config['mountOptions']) ? $config['mountOptions'] : [],
-			)
-		);
-		return hash('md5', $data);
-	}
+    // 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;
+
+    /** @var Application */
+    public static $app;
+
+    /**
+     * @param string $class
+     * @param array $definition
+     * @return bool
+     * @deprecated 8.2.0 use \OCA\Files_External\Service\BackendService::registerBackend()
+     */
+    public static function registerBackend($class, $definition) {
+        $backendService = self::$app->getContainer()->query(BackendService::class);
+        $auth = self::$app->getContainer()->query(Builtin::class);
+
+        $backendService->registerBackend(new LegacyBackend($class, $definition, $auth));
+
+        return true;
+    }
+
+    /**
+     * Returns the mount points for the given user.
+     * The mount point is relative to the data directory.
+     *
+     * @param string $uid user
+     * @return array of mount point string as key, mountpoint config as value
+     *
+     * @deprecated 8.2.0 use UserGlobalStoragesService::getStorages() and UserStoragesService::getStorages()
+     */
+    public static function getAbsoluteMountPoints($uid) {
+        $mountPoints = array();
+
+        $userGlobalStoragesService = self::$app->getContainer()->query(UserGlobalStoragesService::class);
+        $userStoragesService = self::$app->getContainer()->query(UserStoragesService::class);
+        $user = self::$app->getContainer()->query(IUserManager::class)->get($uid);
+
+        $userGlobalStoragesService->setUser($user);
+        $userStoragesService->setUser($user);
+
+        foreach ($userGlobalStoragesService->getStorages() as $storage) {
+            /** @var \OCA\Files_External\Lib\StorageConfig $storage */
+            $mountPoint = '/'.$uid.'/files'.$storage->getMountPoint();
+            $mountEntry = self::prepareMountPointEntry($storage, false);
+            foreach ($mountEntry['options'] as &$option) {
+                $option = self::substitutePlaceholdersInConfig($option, $uid);
+            }
+            $mountPoints[$mountPoint] = $mountEntry;
+        }
+
+        foreach ($userStoragesService->getStorages() as $storage) {
+            $mountPoint = '/'.$uid.'/files'.$storage->getMountPoint();
+            $mountEntry = self::prepareMountPointEntry($storage, true);
+            foreach ($mountEntry['options'] as &$option) {
+                $option = self::substitutePlaceholdersInConfig($option, $uid);
+            }
+            $mountPoints[$mountPoint] = $mountEntry;
+        }
+
+        $userGlobalStoragesService->resetUser();
+        $userStoragesService->resetUser();
+
+        return $mountPoints;
+    }
+
+    /**
+     * Get the system mount points
+     *
+     * @return array
+     *
+     * @deprecated 8.2.0 use GlobalStoragesService::getStorages()
+     */
+    public static function getSystemMountPoints() {
+        $mountPoints = [];
+        $service = self::$app->getContainer()->query(GlobalStoragesService::class);
+
+        foreach ($service->getStorages() as $storage) {
+            $mountPoints[] = self::prepareMountPointEntry($storage, false);
+        }
+
+        return $mountPoints;
+    }
+
+    /**
+     * Get the personal mount points of the current user
+     *
+     * @return array
+     *
+     * @deprecated 8.2.0 use UserStoragesService::getStorages()
+     */
+    public static function getPersonalMountPoints() {
+        $mountPoints = [];
+        $service = self::$app->getContainer()->query(UserStoragesService::class);
+
+        foreach ($service->getStorages() as $storage) {
+            $mountPoints[] = self::prepareMountPointEntry($storage, true);
+        }
+
+        return $mountPoints;
+    }
+
+    /**
+     * Convert a StorageConfig to the legacy mountPoints array format
+     * There's a lot of extra information in here, to satisfy all of the legacy functions
+     *
+     * @param StorageConfig $storage
+     * @param bool $isPersonal
+     * @return array
+     */
+    private static function prepareMountPointEntry(StorageConfig $storage, $isPersonal) {
+        $mountEntry = [];
+
+        $mountEntry['mountpoint'] = substr($storage->getMountPoint(), 1); // remove leading slash
+        $mountEntry['class'] = $storage->getBackend()->getIdentifier();
+        $mountEntry['backend'] = $storage->getBackend()->getText();
+        $mountEntry['authMechanism'] = $storage->getAuthMechanism()->getIdentifier();
+        $mountEntry['personal'] = $isPersonal;
+        $mountEntry['options'] = self::decryptPasswords($storage->getBackendOptions());
+        $mountEntry['mountOptions'] = $storage->getMountOptions();
+        $mountEntry['priority'] = $storage->getPriority();
+        $mountEntry['applicable'] = [
+            'groups' => $storage->getApplicableGroups(),
+            'users' => $storage->getApplicableUsers(),
+        ];
+        // if mountpoint is applicable to all users the old API expects ['all']
+        if (empty($mountEntry['applicable']['groups']) && empty($mountEntry['applicable']['users'])) {
+            $mountEntry['applicable']['users'] = ['all'];
+        }
+
+        $mountEntry['id'] = $storage->getId();
+
+        return $mountEntry;
+    }
+
+    /**
+     * fill in the correct values for $user
+     *
+     * @param string $user user value
+     * @param string|array $input
+     * @return string
+     * @deprecated use self::substitutePlaceholdersInConfig($input)
+     */
+    public static function setUserVars($user, $input) {
+        $handler = self::$app->getContainer()->query(UserPlaceholderHandler::class);
+        return $handler->handle($input);
+    }
+
+    /**
+     * @param mixed $input
+     * @param string|null $userId
+     * @return mixed
+     * @throws \OCP\AppFramework\QueryException
+     * @since 16.0.0
+     */
+    public static function substitutePlaceholdersInConfig($input, string $userId = null) {
+        /** @var BackendService $backendService */
+        $backendService = self::$app->getContainer()->query(BackendService::class);
+        /** @var IConfigHandler[] $handlers */
+        $handlers = $backendService->getConfigHandlers();
+        foreach ($handlers as $handler) {
+            if ($handler instanceof UserContext && $userId !== null) {
+                $handler->setUserId($userId);
+            }
+            $input = $handler->handle($input);
+        }
+        return $input;
+    }
+
+    /**
+     * Test connecting using the given backend configuration
+     *
+     * @param string $class backend class name
+     * @param array $options backend configuration options
+     * @param boolean $isPersonal
+     * @return int see self::STATUS_*
+     * @throws Exception
+     */
+    public static function getBackendStatus($class, $options, $isPersonal, $testOnly = true) {
+        if (self::$skipTest) {
+            return StorageNotAvailableException::STATUS_SUCCESS;
+        }
+        foreach ($options as $key => &$option) {
+            if($key === 'password') {
+                // no replacements in passwords
+                continue;
+            }
+            $option = self::substitutePlaceholdersInConfig($option);
+        }
+        if (class_exists($class)) {
+            try {
+                /** @var \OC\Files\Storage\Common $storage */
+                $storage = new $class($options);
+
+                try {
+                    $result = $storage->test($isPersonal, $testOnly);
+                    $storage->setAvailability($result);
+                    if ($result) {
+                        return StorageNotAvailableException::STATUS_SUCCESS;
+                    }
+                } catch (\Exception $e) {
+                    $storage->setAvailability(false);
+                    throw $e;
+                }
+            } catch (Exception $exception) {
+                \OC::$server->getLogger()->logException($exception, ['app' => 'files_external']);
+                throw $exception;
+            }
+        }
+        return StorageNotAvailableException::STATUS_ERROR;
+    }
+
+    /**
+     * Read the mount points in the config file into an array
+     *
+     * @param string|null $user If not null, personal for $user, otherwise system
+     * @return array
+     */
+    public static function readData($user = null) {
+        if (isset($user)) {
+            $jsonFile = \OC::$server->getUserManager()->get($user)->getHome() . '/mount.json';
+        } else {
+            $config = \OC::$server->getConfig();
+            $datadir = $config->getSystemValue('datadirectory', \OC::$SERVERROOT . '/data/');
+            $jsonFile = $config->getSystemValue('mount_file', $datadir . '/mount.json');
+        }
+        if (is_file($jsonFile)) {
+            $mountPoints = json_decode(file_get_contents($jsonFile), true);
+            if (is_array($mountPoints)) {
+                return $mountPoints;
+            }
+        }
+        return array();
+    }
+
+    /**
+     * Get backend dependency message
+     * TODO: move into AppFramework along with templates
+     *
+     * @param Backend[] $backends
+     * @return string
+     */
+    public static function dependencyMessage($backends) {
+        $l = \OC::$server->getL10N('files_external');
+        $message = '';
+        $dependencyGroups = [];
+
+        foreach ($backends as $backend) {
+            foreach ($backend->checkDependencies() as $dependency) {
+                if ($message = $dependency->getMessage()) {
+                    $message .= '<p>' . $message . '</p>';
+                } else {
+                    $dependencyGroups[$dependency->getDependency()][] = $backend;
+                }
+            }
+        }
+
+        foreach ($dependencyGroups as $module => $dependants) {
+            $backends = implode(', ', array_map(function($backend) {
+                return '"' . $backend->getText() . '"';
+            }, $dependants));
+            $message .= '<p>' . OC_Mount_Config::getSingleDependencyMessage($l, $module, $backends) . '</p>';
+        }
+
+        return $message;
+    }
+
+    /**
+     * Returns a dependency missing message
+     *
+     * @param \OCP\IL10N $l
+     * @param string $module
+     * @param string $backend
+     * @return string
+     */
+    private static function getSingleDependencyMessage(\OCP\IL10N $l, $module, $backend) {
+        switch (strtolower($module)) {
+            case 'curl':
+                return (string)$l->t('The cURL support in PHP is not enabled or installed. Mounting of %s is not possible. Please ask your system administrator to install it.', [$backend]);
+            case 'ftp':
+                return (string)$l->t('The FTP support in PHP is not enabled or installed. Mounting of %s is not possible. Please ask your system administrator to install it.', [$backend]);
+            default:
+                return (string)$l->t('"%1$s" is not installed. Mounting of %2$s is not possible. Please ask your system administrator to install it.', [$module, $backend]);
+        }
+    }
+
+    /**
+     * Encrypt passwords in the given config options
+     *
+     * @param array $options mount options
+     * @return array updated options
+     */
+    public static function encryptPasswords($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 $options mount options
+     * @return array updated options
+     */
+    public static function decryptPasswords($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();
+        $iv = \OC::$server->getSecureRandom()->generate(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);
+    }
+
+    /**
+     * Returns the encryption cipher
+     *
+     * @return AES
+     */
+    private static function getCipher() {
+        $cipher = new AES(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.
+     *
+     * @param array $config
+     * @return string
+     */
+    public static function makeConfigHash($config) {
+        $data = json_encode(
+            array(
+                'c' => $config['backend'],
+                'a' => $config['authMechanism'],
+                'm' => $config['mountpoint'],
+                'o' => $config['options'],
+                'p' => isset($config['priority']) ? $config['priority'] : -1,
+                'mo' => isset($config['mountOptions']) ? $config['mountOptions'] : [],
+            )
+        );
+        return hash('md5', $data);
+    }
 }

Spacing +11 added lines, -11 removed lines

@@ -247,7 +247,7 @@ 
 			return StorageNotAvailableException::STATUS_SUCCESS;
 		}
 		foreach ($options as $key => &$option) {
-			if($key === 'password') {
+			if ($key === 'password') {
 				// no replacements in passwords
 				continue;
 			}
@@ -284,11 +284,11 @@ 
 	 */
 	public static function readData($user = null) {
 		if (isset($user)) {
-			$jsonFile = \OC::$server->getUserManager()->get($user)->getHome() . '/mount.json';
+			$jsonFile = \OC::$server->getUserManager()->get($user)->getHome().'/mount.json';
 		} else {
 			$config = \OC::$server->getConfig();
-			$datadir = $config->getSystemValue('datadirectory', \OC::$SERVERROOT . '/data/');
-			$jsonFile = $config->getSystemValue('mount_file', $datadir . '/mount.json');
+			$datadir = $config->getSystemValue('datadirectory', \OC::$SERVERROOT.'/data/');
+			$jsonFile = $config->getSystemValue('mount_file', $datadir.'/mount.json');
 		}
 		if (is_file($jsonFile)) {
 			$mountPoints = json_decode(file_get_contents($jsonFile), true);
@@ -314,7 +314,7 @@ 
 		foreach ($backends as $backend) {
 			foreach ($backend->checkDependencies() as $dependency) {
 				if ($message = $dependency->getMessage()) {
-					$message .= '<p>' . $message . '</p>';
+					$message .= '<p>'.$message.'</p>';
 				} else {
 					$dependencyGroups[$dependency->getDependency()][] = $backend;
 				}
@@ -323,9 +323,9 @@ 
 
 		foreach ($dependencyGroups as $module => $dependants) {
 			$backends = implode(', ', array_map(function($backend) {
-				return '"' . $backend->getText() . '"';
+				return '"'.$backend->getText().'"';
 			}, $dependants));
-			$message .= '<p>' . OC_Mount_Config::getSingleDependencyMessage($l, $module, $backends) . '</p>';
+			$message .= '<p>'.OC_Mount_Config::getSingleDependencyMessage($l, $module, $backends).'</p>';
 		}
 
 		return $message;
@@ -342,11 +342,11 @@ 
 	private static function getSingleDependencyMessage(\OCP\IL10N $l, $module, $backend) {
 		switch (strtolower($module)) {
 			case 'curl':
-				return (string)$l->t('The cURL support in PHP is not enabled or installed. Mounting of %s is not possible. Please ask your system administrator to install it.', [$backend]);
+				return (string) $l->t('The cURL support in PHP is not enabled or installed. Mounting of %s is not possible. Please ask your system administrator to install it.', [$backend]);
 			case 'ftp':
-				return (string)$l->t('The FTP support in PHP is not enabled or installed. Mounting of %s is not possible. Please ask your system administrator to install it.', [$backend]);
+				return (string) $l->t('The FTP support in PHP is not enabled or installed. Mounting of %s is not possible. Please ask your system administrator to install it.', [$backend]);
 			default:
-				return (string)$l->t('"%1$s" is not installed. Mounting of %2$s is not possible. Please ask your system administrator to install it.', [$module, $backend]);
+				return (string) $l->t('"%1$s" is not installed. Mounting of %2$s is not possible. Please ask your system administrator to install it.', [$module, $backend]);
 		}
 	}
 
@@ -391,7 +391,7 @@ 
 		$cipher = self::getCipher();
 		$iv = \OC::$server->getSecureRandom()->generate(16);
 		$cipher->setIV($iv);
-		return base64_encode($iv . $cipher->encrypt($password));
+		return base64_encode($iv.$cipher->encrypt($password));
 	}
 
 	/**