password restoration

4 years ago · 810af90c67
12 changed files with 717 additions and 37 deletions
--- a/package-lock.json
+++ b/package-lock.json
@ -119,11 +119,26 @@
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@ -1568,6 +2110,11 @@
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+      "resolved": "https://registry.npmjs.org/with-callback/-/with-callback-1.0.2.tgz",
+      "integrity": "sha1-oJYpuakgAo1yFAT7Q1vc/1yRvCE="
+    },
    "wkx": {
      "version": "0.5.0",
      "resolved": "https://registry.npmjs.org/wkx/-/wkx-0.5.0.tgz",
@ -1576,11 +2123,21 @@
        "@types/node": "*"
      }
    },
+    "word-wrap": {
+      "version": "1.2.3",
+      "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.3.tgz",
+      "integrity": "sha512-Hz/mrNwitNRh/HUAtM/VT/5VH+ygD6DV7mYKZAtHOrbs8U7lvPS6xf7EJKMF0uW1KJCl0H701g3ZGus+muE5vQ=="
+    },
    "wrappy": {
      "version": "1.0.2",
      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
    },
+    "xregexp": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/xregexp/-/xregexp-2.0.0.tgz",
+      "integrity": "sha1-UqY+VsoLhKfzpfPWGHLxJq16WUM="
+    },
    "yallist": {
      "version": "4.0.0",
      "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
--- a/package.json
+++ b/package.json
@ -14,6 +14,7 @@
    "fastify": "^3.22.0",
    "fastify-formbody": "^5.1.0",
    "fastify-multipart": "^5.0.2",
+    "mailgun-js": "^0.22.0",
    "sequelize": "^6.7.0",
    "sqlite3": "^5.0.2"
  }
--- a/src/config/database.config.js
+++ b/src/config/database.config.js
--- a/src/config/email.config.js
+++ b/src/config/email.config.js
@ -0,0 +1,11 @@
+
+export const MailgunAccount = {
+	apiKey: '0f5cb2ebb348c88c708f1b9f7e20c385-e5da0167-1b06a230',
+	publicApiKey: 'pubkey-933b975a7865e74f365bbd6e0bce889d',
+	host: 'api.eu.mailgun.net',
+	domain: '7winds.nikky.dev'
+};
+
+export const EmailConfig = {
+	from: "Jun Kuroshio <noreply@7winds.nikky.dev>"
+}
--- a/src/index.js
+++ b/src/index.js
@ -2,7 +2,7 @@ import Fastify from 'fastify'
 import formBodyPlugin from 'fastify-formbody';
 import fastifyMultipart from 'fastify-multipart';
 import Sequelize from 'sequelize';
-import { DatabaseConfig } from './config/database.js';
+import { DatabaseConfig } from './config/database.config.js';
 import UserEntity from './model/user.model.js';
 import AuthController from './route/auth.controller.js';
 import UserController from './route/user.controller.js';
@ -36,7 +36,7 @@ async function WebApp(){
 (async () => {
 	//initialize
 	const step = async (func, name) => {
-		let start = Date.now();
+		const start = Date.now();
 		const msg = await func();
 		console.log(`[${name}] (${(Date.now() - start)} ms) ${msg || ''}`);
 	};
--- a/src/logic/email.js
+++ b/src/logic/email.js
@ -0,0 +1,30 @@
+import { EmailConfig, MailgunAccount } from "../config/email.config.js";
+import Mailgun from "mailgun-js";
+import { RestorePasswordEmail } from "../misc/email-templates.js";
+
+const mailgun = Mailgun(MailgunAccount);
+
+function sendMail(opts){
+	return new Promise((resolve, reject) => {
+		try{
+			mailgun.messages().send(opts, (error, body) => {
+				resolve(!error);
+			});
+		}catch(error){
+			reject(error);
+		}
+	});
+}
+
+export async function sendRestorationLink(user, app){
+	const template = RestorePasswordEmail({
+		username: user.username,
+		url: app.hostname+'/'+user.restoreCode
+	});
+	return await sendMail({
+		from: EmailConfig.from,
+		to: user.email,
+		subject: template.subject,
+		text: template.text
+	});
+}
--- a/src/logic/security.js
+++ b/src/logic/security.js
@ -22,24 +22,34 @@ export function doesPasswordMatch(paswd, hash){
 	return bcrypt.compareSync(paswd, hash);
 }

+//-- password restore --
+
+const hours = 60*60*1000;
+export const restoreValidity = 12 * hours;
+export const restoreAttempts = 8;
+
+export function generateRestoreCode(){
+	return crypto.randomBytes(16).toString('hex');
+}
+
 //-- access tokens --

 const days = 24*60*60*1000;
 export const tokenLifetime = 90 * days;
 export const tokenReissue  = 60 * days;

-export async function reissueToken(user, Users){
+export async function reissueToken(user){
 	const token = generateToken();
 	const tokenExpiry = newTokenExpiry();
-	await Users.update({token, tokenExpiry}, {where: {id: user.id}});
+	await user.update({token, tokenExpiry});
 	return token;
 }

 export function generateToken(){
 	return (
-		crypto.randomBytes(16).toString('hex')
-		+ ((++tokenTempCounter).toString(16))+'g'
-		+ (Date.now().toString(16))
+		crypto.randomBytes(14).toString('hex')
+		+ ((++tokenTempCounter).toString(16).slice(-4))+'g'
+		+           (Date.now().toString(16).slice(-5))
 	);
 }
 let tokenTempCounter = 0;
--- a/src/logic/common.js
+++ b/src/logic/common.js
@ -19,3 +19,16 @@ export function reverseString(str){
 export function randomElement(arr){
    return arr[Math.floor(Math.random()*arr.length)];
 }
+
+export function notYet(date){
+    if(!date) return false;
+    return (new Date() <= date);
+}
+
+// export class CacheTable{
+
+//     constructor(){
+//         this.data = {};
+//     }
+
+// }
--- a/src/misc/email-templates.js
+++ b/src/misc/email-templates.js
@ -0,0 +1,11 @@
+
+export const RestorePasswordEmail = ({username, url}) => ({
+	subject: `Account recovery`,
+	text: `
+		Hello, ${username}.
+		We received a request to reset your password.
+		Follow the link below to proceed:
+		${url}
+		If you didn't request this change, ignore this email.
+	`
+});
--- a/src/model/user.model.js
+++ b/src/model/user.model.js
@ -11,10 +11,10 @@ const UserEntity = ({db}) => (
 		role:     Sequelize.TEXT,
 		firstIp:     Sequelize.TEXT,
 		bannedUntil: Sequelize.DATE,
-		banReason:   Sequelize.TEXT
+		banReason:   Sequelize.TEXT,
 		
-		// emailed_last:         { type: Sequelize.DATE,    defaultValue: null },
-		// visited_times:        { type: Sequelize.INTEGER, defaultValue: 0    }
+		restoreCode:   Sequelize.TEXT,
+		restoreExpiry: Sequelize.DATE
 	})
 );

--- a/src/route/auth.controller.js
+++ b/src/route/auth.controller.js
@ -1,6 +1,7 @@
-import { checkStringParam, errorOut, randomElement, reverseString } from '../logic/common.js';
+import { checkStringParam, errorOut, notYet, randomElement, reverseString } from '../logic/utils.js';
 import { Animals } from '../misc/animals.js';
-import { reissueToken, generateToken, newTokenExpiry, hashPassword, doesPasswordMatch } from '../logic/security.js';
+import { reissueToken, generateToken, newTokenExpiry, hashPassword, doesPasswordMatch, isEndpointAllowedForBannedUsers, isEndpointProtected, generateRestoreCode, restoreValidity, restoreAttempts } from '../logic/security.js';
+import { sendRestorationLink } from '../logic/email.js';

 /**
 * @param {Object} props
@ -14,16 +15,14 @@ function AuthController({app, db}){
 	{ //validate token header and put .user in every request
 		app.decorateRequest('user', null);
 		app.addHook('preHandler', async (request, reply) => {
-			const unprotectedUrl = (request.url.substring(0, 6) == '/auth/') || (request.url === '/');
-
-			if(!unprotectedUrl){				
+			if(isEndpointProtected(request.url)){				
 				const token = request.headers.authorization;
 				//todo:  local cache
 				
 				const user = await Users.findOne({where: {token}});
-				const tokenNotExpired = user && (new Date() <= user.tokenExpiry);
-				const userNotBanned = true;
-				if(tokenNotExpired && userNotBanned){
+				const tokenNotExpired = notYet(user?.tokenExpiry);
+				const userNotBanned = (!notYet(user?.bannedUntil)) || isEndpointAllowedForBannedUsers(request.url);
+				if(user && tokenNotExpired && userNotBanned){
 					request.user = user;
 				}else{
 					errorOut(reply, 'Unauthorized', 401);
@ -38,8 +37,8 @@ function AuthController({app, db}){
 		//todo:  spam check

 		{ //form validation
-			if(!isValidEmail(email))       return errorOut(reply, 'auth.bad_email');
-			if(!isValidPassword(paswd))    return errorOut(reply, 'auth.bad_paswd');
+			if(!isValidEmail(email))    return errorOut(reply, 'auth.bad_email');
+			if(!isValidPassword(paswd)) return errorOut(reply, 'auth.bad_paswd');
 		}
 		const fixedEmail = fixEmail(email);
 		const user = await Users.findOne({where: {email: fixedEmail}});
@ -47,7 +46,7 @@ function AuthController({app, db}){
 		if(user && doesPasswordMatch(reverseString(paswd), user.paswd)){
 			let token = user.token;
 			if(new Date() > user.tokenExpiry){
-				token = await reissueToken(user, Users);
+				token = await reissueToken(user);
 			}
 			return {token};
 		}else{
@ -93,6 +92,54 @@ function AuthController({app, db}){
 		return {token: newUser.token};
 	});

+	app.post('/auth/restore/request', async (request, reply) => {
+		const {email} = request.body || {};
+		
+		if(!isValidEmail(email)) return errorOut(reply, 'auth.bad_email');
+		const fixedEmail = fixEmail(email);
+
+		const user = await Users.findOne({where: {email: fixedEmail}});
+		if(!user) return errorOut(reply, 'restore.not_found');
+		if(user.restoreExpiry && notYet(user.restoreExpiry)){
+			return errorOut(reply, 'restore.already_sent');
+		}
+
+		const restoreCode = generateRestoreCode();
+		const restoreExpiry = new Date(Date.now() + restoreValidity);
+		await user.update({restoreCode, restoreExpiry});
+		const success = await sendRestorationLink(user, app);
+		return {success, lifetime: restoreValidity};
+	});
+
+	app.post('/auth/restore/apply', async (request, reply) => {
+		const {email, code, newpaswd} = request.body || {};
+		const changeRequested = (newpaswd != null);
+
+		if(!isValidEmail(email)) return errorOut(reply, 'auth.bad_email');
+		if(changeRequested && (!isValidPassword(newpaswd))){
+			return errorOut(reply, 'auth.bad_paswd');
+		}
+		const fixedEmail = fixEmail(email);
+
+		const user = await Users.findOne({where: {email: fixedEmail}});
+		if(!user) return errorOut(reply, 'restore.not_found');
+		if((!notYet(user.restoreExpiry)) || (!user.restoreCode)){
+			return errorOut(reply, 'restore.expired');
+		}
+
+		if(user.restoreCode != code){
+			const restoreExpiry = user.restoreExpiry - (restoreValidity / restoreAttempts);
+			await user.update({restoreExpiry});
+			return errorOut(reply, 'restore.wrong_code');
+		}
+
+		if(changeRequested){
+			const hash = hashPassword(reverseString(newpaswd));
+			await user.update({paswd: hash, restoreCode: null, restoreExpiry: null});
+		}
+		return '👌';
+	});
+
 }

 function fixEmail(email){
@ -107,7 +154,7 @@ function fixUsername(username){
 		return username.replace(profanities, '💩').replace(badSymbols, '');
 	}else{
 		const nick = randomElement(Animals);
-		const tag = Date.now().toString(10).slice(-4);
+		const tag = Date.now().toString().slice(-4);
 		return `Little ${nick} #${tag}`;
 	}
 }
--- a/src/route/user.controller.js
+++ b/src/route/user.controller.js
@ -12,7 +12,7 @@ function UserController({app, db}){
 	app.get('/users/me', async (request, reply) => {
 		const {user} = request;
 		const needsReissue = ((user.tokenExpiry - new Date()) < (tokenLifetime - tokenReissue));
-		let newToken = needsReissue ? await reissueToken(user, Users) : null;
+		let newToken = needsReissue ? await reissueToken(user) : null;
 		
 		return {
 			username: user.username,