BUGFIX: clashing pending signups fixed

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "auth-server",
-  "version": "1.7.4",
+  "version": "1.7.7",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "auth-server",
-      "version": "1.7.4",
+      "version": "1.7.7",
       "license": "ISC",
       "dependencies": {
         "bcryptjs": "^2.4.3",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "auth-server",
-  "version": "1.7.4",
+  "version": "1.7.7",
   "description": "An API centric auth server. Uses Sequelize and mariaDB by default.",
   "main": "server/server.js",
   "scripts": {

server/auth/signup.js

@@ -19,6 +19,13 @@ const route = async (req, res) => {
 		return res.status(401).send(validateErr);
 	}
 
+	//script throttle
+	const throttle = await checkThrottle(req.body.email);
+	if (throttle) {
+		console.warn(`Spam attack detected: ${req.body.email} (${req.body.username})`);
+		return res.status(401).send(throttle);
+	}
+
 	//generate the password hash
 	const hash = await bcrypt.hash(req.body.password, await bcrypt.genSalt(11));
 
@@ -94,8 +101,41 @@ const validateDetails = async (body) => {
 	return null;
 };
 
+const checkThrottle = async (email) => {
+	//check email delay
+	const prev = await pendingSignups.findOne({
+		where: {
+			email: email,
+		}
+	});
+
+	const DateOffset = ( offset ) => { //Thanks, SO!
+		return new Date( +new Date + offset );
+	}
+
+	if (!!prev && prev.updatedAt > DateOffset( -5000 )) {
+		return "An unknown error occurred";
+	}
+
+	return null;
+}
+
 const registerPendingSignup = async (body, hash, token) => {
-	const record = await pendingSignups.upsert({
+	//BUGFIX: delete existing pending signups that clash
+	await pendingSignups.destroy({
+		where: {
+			email: body.email
+		}
+	});
+
+	await pendingSignups.destroy({
+		where: {
+			username: body.username
+		}
+	});
+
+	//record it
+	const record = await pendingSignups.create({
 		email: body.email,
 		username: body.username,
 		hash: hash,

server/database/models/banned-ip-addresses.js

@@ -0,0 +1,15 @@
+const Sequelize = require('sequelize');
+const sequelize = require('..');
+
+module.exports = sequelize.define('bannedIPAddresses', {
+	content: {
+		type: 'varchar(320)',
+		unique: true
+	},
+
+	expiry: {
+		type: 'DATETIME',
+		allowNull: true,
+		defaultValue: null
+	},
+});

server/database/models/index.js

@@ -2,5 +2,6 @@ module.exports = {
 	tokens: require('./tokens'),
 	accounts: require('./accounts'),
 	pendingSignups: require('./pending-signups'),
-	recovery: require('./recovery')
+	recovery: require('./recovery'),
+	bannedIPAddresses: require("./banned-ip-addresses"),
 };

server/server.js

@@ -23,6 +23,9 @@ app.use(cookieParser());
 //database connection
 const database = require('./database');
 
+//ip-based management
+app.use(require('./utilities/banned-up-addresses-middleware'));
+
 //access the admin
 app.use('/admin', require('./admin'));
 

server/utilities/banned-up-addresses-middleware.js

@@ -0,0 +1,25 @@
+const { Op } = require("sequelize");
+const { bannedIPAddresses } = require('../database/models');
+
+//middleware to manage banned IP addresses
+module.exports = async (req, res, next) => {
+	const address = req.header('x-forwarded-for') || req.socket.remoteAddress;
+
+	const record = await bannedIPAddresses.findOne({
+		where: {
+			content: address,
+
+			expiry: {
+				[Op.gt]: Date.now()
+			}
+		}
+	});
+
+	if (!!record) {
+		return res.status(403).send("IP address banned");
+	}
+
+	console.log(`IP      ${address}`);
+
+	return next();
+};