remoteCommands added plugin and master API endpoint for executing things

.gitignore

@@ -34,6 +34,7 @@ Factorio*
 database/items.db
 config.json
 package-lock.json
+secret-api-token.txt
 mod_cache.json
 static/pictures/spritesheet.js
 static/pictures/spritesheet.png
@@ -44,4 +45,5 @@ static/external
 sharedPlugins/*
 !sharedPlugins/inventoryImports/
 !sharedPlugins/UPSdisplay/
-!sharedPlugins/remoteMap/
+!sharedPlugins/remoteMap/
+!sharedPlugins/remoteCommands/

client.js

@@ -445,7 +445,7 @@ function instanceManagement() {
 			global.subscribedFiles = {};
 		}
 		if(pluginConfig.binary == "nodePackage"){
-			// require index.js.main() of plugin and execute it as a function
+			// require index.js.main() of plugin and execute it as a class
 			let pluginClass = require("./sharedPlugins/" + pluginDirectories[I] + "/index.js");
 			plugins[I] = new pluginClass(combinedConfig, function(data){
 				if(data.toString('utf8')[0] != "/") {
@@ -453,6 +453,8 @@ function instanceManagement() {
 				} else {
 					messageInterface(data.toString('utf8'));
 				}
+			}, { // extra functions to pass in object. Should have done it like this from the start, but won't break backwards compat.
+				socket, // socket.io connection to master (and ES6 destructuring, yay)
 			});
 			if(pluginConfig.scriptOutputFileSubscription && typeof pluginConfig.scriptOutputFileSubscription == "string"){
 				if(global.subscribedFiles[pluginConfig.scriptOutputFileSubscription]) {

config.json

@@ -8,6 +8,10 @@
 	"__comment2": "IP the master web server runs at, can be ignored on the master system",
 	"masterIP": "localhost",
 	"masterPort": 8080,
+	"masterAuthToken": "",
+	
+	"__commentAuthSecret": "This is a long random string generated by keyboard mashing. Please mash you own string for security.",
+	"masterAuthSecret": "anfeåpvunuennuusnvzunsrevunåzeufnewnufasiojfåqwoiuajknwkjfdabewfkjadfnewåfundjkcvnewmfqewrmn123",
 	
 	"__comment3": "Your factorio.com username for factorio MP services, also username will be admin",
 	"username": "",
@@ -30,5 +34,6 @@
 		"entriesPerSecond": 0.01666666667
 	},
 	"logItemTransfers": false,
-	"uploadModsToMaster": true
+	"uploadModsToMaster": true,
+	"allowRemoteCommandExecution": false
 }

master.js

@@ -36,13 +36,15 @@ const averagedTimeSeries = require("averaged-timeseries");
 const deepmerge = require("deepmerge");
 const path = require("path");
 const fs = require("fs");
-var nedb = require("nedb");
+const nedb = require("nedb");
+const jwt = require('jsonwebtoken');
+const bcrypt = require('bcryptjs');
 
-var express = require("express");
-var ejs = require("ejs");
+const express = require("express");
+const ejs = require("ejs");
 // Required for express post requests
-var bodyParser = require("body-parser");
-var fileUpload = require('express-fileupload');
+const bodyParser = require("body-parser");
+const fileUpload = require('express-fileupload');
 var app = express();
 
 app.use(bodyParser.json());
@@ -685,6 +687,43 @@ app.post("/api/getTimelineStats", function(req,res) {
 	}
 });
 /**
+POST endpoint for running commands on slaves.
+Requires x-access-token header to be set. Find you api token in secret-api-token.txt on the master (after running it once)
+
+@memberof clusterioMaster
+@instance
+@alias api/runCommand
+@param {object} JSON {instanceID:19412312, command:"/c game.print('hello')"}
+@returns {object} Status {auth: bool, message: "Informative error"}
+*/
+// write an auth token to file
+fs.writeFileSync("secret-api-token.txt", jwt.sign({ id: "api" }, config.masterAuthSecret, {
+	expiresIn: 86400*365 // expires in 1 year
+}));
+app.post("/api/runCommand", (req,res) => {
+	var token = req.headers['x-access-token'];
+	if(!token) return res.status(401).send({ auth: false, message: 'No token provided.' });
+	
+	jwt.verify(token, config.masterAuthSecret, function(err, decoded) {
+		if(err) return res.status(500).send({ auth: false, message: 'Failed to authenticate token.' });
+		
+		// validate request.body
+		let body = req.body;
+		if(body.instanceID
+		&& Object.keys(wsSlaves).includes(body.instanceID)
+		&& body.command
+		&& typeof body.command == "string"
+		&& body.command[0] == "/"){
+			// execute command
+			wsSlaves[body.instanceID].runCommand(body.command, data => {
+				res.status(200).send({auth: true, message: "success", data});
+			});
+		} else {
+			res.status(400).send({auth: true, message: "Error: invalid request.body"});
+		}
+	});
+});
+/**
 GET endpoint. Returns factorio's base locale as a JSON object.
 
 @memberof clusterioMaster
@@ -792,6 +831,19 @@ class wsSlave {
 				});
 			}
 		});
+		// handle command return values
+		this.commandsWaitingForReturn = {};
+		this.socket.on("runCommandReturnValue", resp => {
+			if(resp.commandID && resp.body && this.commandsWaitingForReturn[resp.commandID] && this.commandsWaitingForReturn[resp.commandID].callback && typeof this.commandsWaitingForReturn[resp.commandID].callback == "function"){
+				this.commandsWaitingForReturn[resp.commandID].callback(resp.body);
+				delete this.commandsWaitingForReturn[resp.commandID];
+			}
+		});
+	}
+	runCommand(command, callback){
+		let commandID = Math.random().toString();
+		this.socket.emit("runCommand", {command, commandID});
+		this.commandsWaitingForReturn[commandID] = {callback, timestamp: Date.now()};
 	}
 }
 io.on('connection', function (socket) {

package.json

@@ -21,6 +21,7 @@
     "app-root-path": "^2.0.1",
     "as-table": "^1.0.31",
     "averaged-timeseries": "^1.4.0",
+    "bcryptjs": "^2.4.3",
     "body-parser": "^1.18.2",
     "codecov": "^2.3.1",
     "deepmerge": "^1.5.2",
@@ -33,6 +34,7 @@
     "hash-files": "^1.1.1",
     "html5-validator": "^1.0.7",
     "ini": "^1.3.5",
+    "jsonwebtoken": "^8.2.1",
     "leveldown": "^1.9.0",
     "linvodb3": "^3.25.1",
     "luamin": "^1.0.4",

sharedPlugins/remoteCommands/config.js

@@ -0,0 +1,14 @@
+/*
+	Config for clusterio remote command plugin.
+	Allows you to execute commands on slaves with a web API.
+	
+	Careful, may allow for RCE vulnerabilities.
+*/
+var modInfo = require("./info.json");
+module.exports = {
+	// Name of package. For display somewhere I guess.
+	name: "remoteCommands",
+	version: "1.0.0",
+	binary: "nodePackage",
+	description: "Config for clusterio remote command plugin. Allows you to execute commands on slaves with a web API.",
+}

sharedPlugins/remoteCommands/index.js

@@ -0,0 +1,23 @@
+module.exports.main = class remoteCommands {
+	constructor(mergedConfig, messageInterface, extras){
+		console.log = messageInterface;
+		this.messageInterface = messageInterface;
+		this.config = mergedConfig;
+		this.socket = extras.socket;
+		
+		if(this.config.allowRemoteCommandExecution){
+			this.socket.on("runCommand", data => {
+				let {commandID} = data;
+				this.messageInterface(data.command);
+				if(commandID){
+					this.socket.emit("runCommandReturnValue", {
+						commandID,
+						body: {
+							info: "Command was sent to factorio",
+						},
+					});
+				}
+			});
+		}
+	}
+}