Do not encrypt empty path

src/backups.js

@@ -325,7 +325,8 @@ function sync(backupConfig, backupId, dataDir, callback) {
 
     syncer.sync(dataDir, function processTask(task, iteratorCallback) {
         debug('sync: processing task: %j', task);
-        const destPath = backupConfig.key ? encryptFilePath(task.path, backupConfig.key) : task.path;
+        // the empty task.path is special to signify the directory
+        const destPath = task.path && backupConfig.key ? encryptFilePath(task.path, backupConfig.key) : task.path;
         const backupFilePath = path.join(getBackupFilePath(backupConfig, backupId, backupConfig.format), destPath);
 
         if (task.operation === 'removedir') {

src/storage/s3.js

@@ -420,7 +420,7 @@ function removeDir(apiConfig, pathPrefix) {
                     }
                 };
 
-                events.emit('progress', `Removing ${objects.length} files from ${objects[0].fullPath} to ${objects[objects.length-1].Key}`);
+                events.emit('progress', `Removing ${objects.length} files from ${objects[0].fullPath} to ${objects[objects.length-1].fullPath}`);
 
                 // deleteObjects does not return error if key is not found
                 s3.deleteObjects(deleteParams, function (error /*, deleteData */) {