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app.js
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app.js
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//------------------------------
// Initialize
//------------------------------
const express = require("express");
const bodyParser = require("body-parser");
const bcrypt = require("bcrypt");
const cors = require("cors");
const crypto = require("crypto");
const cryptoRandomString = require("crypto-random-string");
const cookieParser = require('cookie-parser');
const cookieSession = require('cookie-session');
const keygrip = require("keygrip");
const fs = require("fs");
const jwt = require("jsonwebtoken");
const ms = require("ms");
const mongoose = require("mongoose");
const nodemailer = require("nodemailer");
const NodeRSA = require("node-rsa");
const uid = require("uid");
const pug = require("pug");
const path = require("path");
const { oneOf, body, query, validationResult } = require("express-validator");
const Config = require("./config/config.json");
const PUBLIC_KEY = fs.readFileSync(__dirname + '/config' + '/public.key');
const PRIVATE_KEY = fs.readFileSync(__dirname + '/config' + '/private.key');
const HOST = Config.Host;
const DB_HOST = Config.DB_Host;
const DB_NAME = Config.DB_Name;
const PORT = Config.Port;
const HOUR_MS = 360000;
const DAY_MS = (1000 * 60 * 60 * 24);
const MAX_REFRESH_TOKEN_LIFE_TIME = (DAY_MS * 7);
const REFRESH_TOKEN_RANDOM_LENGTH = Config.RefreshTokenRandomLength;
const CLIENT_WHITELIST = Config.ClientWhiteList;
let User;
let UserSchema;
let CodeChallenge;
let CodeChallengeSchema;
let Client;
let ClientSchema;
let RefreshToken;
let RefreshTokenSchema;
mongoose.connect(DB_HOST, {
useCreateIndex: true,
useNewUrlParser: true,
useUnifiedTopology: true,
useFindAndModify: false,
dbName: DB_NAME
});
let db = mongoose.connection;
db.on('error', console.error.bind(console, 'connection error:'));
db.once('open', () => {
console.log("Connected to database...");
UserSchema = new mongoose.Schema({
username: String,
fullname: String,
hash: String,
joinDate: String,
verifyHash: String,
isVerified: Boolean
});
CodeChallengeSchema = new mongoose.Schema({
userID: mongoose.Types.ObjectId,
hash: String,
hashMethod: String,
expireDate: Date
});
ClientSchema = new mongoose.Schema({
name: String,
secretKey: String,
publicKey: String
});
RefreshTokenSchema = new mongoose.Schema({
userID: mongoose.Types.ObjectId,
clientID: mongoose.Types.ObjectId,
signature: String,
expireDate: Date
});
User = mongoose.model('User', UserSchema);
CodeChallenge = mongoose.model('CodeChallenge', CodeChallengeSchema);
Client = mongoose.model('Client', ClientSchema);
RefreshToken = mongoose.model('RefreshToken', RefreshTokenSchema);
});
// Keep removing an expire code code challenge in DB
setInterval(() => {
let now = Date.now();
CodeChallenge.deleteMany(
{
expireDate: { $lt: now }
}, (err) => {
if (err)
console.log(err)
});
}, HOUR_MS);
// Keep removing an expire refresh token
setInterval(() => {
let now = Date.now();
Client.deleteMany(
{
expireDate: { $lt: now }
}, (err) => {
if (err)
console.log(err)
});
}, DAY_MS);
/*
function generateKeyPair() {
const key = new NodeRSA({b: 512});
key.generateKeyPair(512);
let public = key.exportKey("pkcs1-public");
let private = key.exportKey("pkcs1-private");
let encrpyted = key.encryptPrivate("iO3quoYg265hlzq30E8RelQc0LOKle4R0yk6CMbgeHgGNcm_mR", "base64", "utf8");
const fs = require('fs');
fs.writeFile('gameserverPublic.pem', public, function (err) {
});
fs.writeFile('gameserverPrivate.pem', private, function (err) {
});
fs.writeFile('gameserverSecret.pem', encrpyted, function (err) {
});
}
*/
// generateKeyPair();
//header for resource reqeust (authen)
//Authorization: Bearer eyJhbGciOiJIUzI1NiIXVCJ9TJV...r7E20RMHrHDcEfxjoYZgeFONFh7HgQ
const EMAIL = Config.Email;
const SUBJECT = {
verify_account: "Shooting Game : Verify your account",
reset_password: "Shooting Game : Reset your password"
}
const transporter = nodemailer.createTransport({
service: "gmail",
auth: {
user: EMAIL,
pass: Config.EmailPassword
}
});
let app = express();
app.use(cors({ origin: true }));
app.use(bodyParser.urlencoded({ extended: true }))
app.use(bodyParser.json())
app.use(express.static("public"))
app.use(cookieParser());
app.use(cookieSession({
name: 'session',
keys: Config.CookieKeyList
}));
//Test <--- replace with DB
let users = [];
//------------------------------
// Request Handler
//------------------------------
//TODO : access token good practice
// {
// "iss": "https://YOUR_DOMAIN/", //<--- who sign this token
// "sub": "auth0|123456",
// "aud": [
// "my-api-identifier", //<-- resource provider
// "https://YOUR_DOMAIN/userinfo" //<-- website, which end point to allow <-- in game (which resource provider end point to allow)
// ],
// "azp": "YOUR_CLIENT_ID", //<--- client id that request
// "exp": 1489179954, //<-- libray handl for us
// "iat": 1489143954, //<-- libray handl for us
// "scope": "openid profile email address phone read:appointments" //<-- read:profile(game client) <--- write:progress (seperate document with _id link (user))
// }
function generateAccessToken(info, lifeTime) {
let payload = {
uid: uid(12),
iss: HOST,
sub: info.sub,
name: info.name,
scope: info.scope || "read"
};
let resultExpire = lifeTime || "1h";
let access_token = jwt.sign(payload, PRIVATE_KEY, { algorithm: "RS256", expiresIn: resultExpire });
let result = {
access_token: access_token,
expires_in: ms(resultExpire)
}
return result;
}
function generateRefreshToken(userID) {
const randomString = cryptoRandomString({length: REFRESH_TOKEN_RANDOM_LENGTH});
const secret = (userID + "." + randomString);
const key = new NodeRSA({b: 512});
key.importKey(PUBLIC_KEY);
key.importKey(PRIVATE_KEY);
key.setOptions({encryptionScheme: 'pkcs1'});
const signature = key.encryptPrivate(secret, "base64", "utf8");
return signature;
}
function generateIDToken(userID, callback, lifeTime) {
User.findById({ _id: userID }, (err, doc) => {
if (err) {
callback(err);
}
let info = {
iss: HOST,
sub: doc._id,
name: doc.fullname,
email: doc.username,
isVerified: doc.isVerified
};
let resultExpire = lifeTime || "10m";
let token = jwt.sign(info, PRIVATE_KEY, { algorithm: "RS256", expiresIn: resultExpire });
callback(err, token);
});
}
function decryptRefreshToken(token) {
try {
const key = new NodeRSA({b: 512});
key.importKey(PUBLIC_KEY);
key.importKey(PRIVATE_KEY);
key.setOptions({encryptionScheme: 'pkcs1'});
const secret = key.decryptPublic(token, "utf8");
return secret;
}
catch (err) {
return undefined;
}
}
function addRefreshToken(token, clientID, userID, callback) {
let userObjectID = mongoose.Types.ObjectId(userID);
let clientObjectID = mongoose.Types.ObjectId(clientID);
try {
let info = {
userID: userObjectID,
clientID: clientObjectID,
signature: token,
expireDate: new Date(Date.now() + MAX_REFRESH_TOKEN_LIFE_TIME)
}
let newToken = new RefreshToken(info);
newToken.save(err => {
if (err) {
throw err;
}
callback(err, token);
});
}
catch (err) {
console.log(err);
callback(err, undefined);
}
}
function updateRefreshToken(token, oldToken, clientID, userID, callback) {
let userObjectID = mongoose.Types.ObjectId(userID);
let clientObjectID = mongoose.Types.ObjectId(clientID);
let NOW = new Date();
try {
RefreshToken.findOneAndUpdate({
userID: userObjectID,
clientID: clientObjectID,
signature: oldToken,
expireDate: {
$gte : NOW
}
},
{
$set: {
signature: token
}
},
{
new: true,
rawResult: true
}, (err, res) => {
if (err) {
callback(err, undefined);
}
else if (res.lastErrorObject.n <= 0) {
callback(err, undefined);
}
else {
callback(err, token);
}
});
}
catch (err) {
console.log(err);
callback(err, undefined);
}
}
function removeRefreshToken(token, clientID, userID, callback) {
let userObjectID = mongoose.Types.ObjectId(userID);
let clientObjectID = mongoose.Types.ObjectId(clientID);
try {
RefreshToken.deleteMany({
userID: userObjectID,
clientID: clientObjectID,
signature: token,
}, (err, result) => {
if (err) {
throw err;
}
callback(err, result);
});
}
catch (err) {
console.log(err);
callback(err, undefined);
}
}
function rotateRefreshToken(client_id, oldToken, userID, callback) {
const newRefreshToken = generateRefreshToken(userID);
try {
updateRefreshToken(newRefreshToken, oldToken, client_id, userID, (err, saveToken) => {
if (err) {
callback(err, undefined);
}
else if (saveToken == undefined) {
callback(err, undefined);
}
else {
callback(err, saveToken);
}
});
}
catch (err) {
console.log(err);
callback(err, undefined);
}
}
function handleTokenRequest(req, res) {
switch (req.body.grant_type)
{
case "password":
handleGrantTypeOfPassword(req, res);
break
case "authorization_code":
handleGrantTypeOfAuthorizationCode(req, res);
break;
case "client_credentials":
handleGrantTypeOfClientCredential(req, res);
break;
case "refresh_token":
handleGrantTypeOfRefreshToken(req, res);
break;
default:
throw "Error..";
}
}
function handleGrantTypeOfPassword(req, res) {
let query = User.where({ username: req.body.username.toLowerCase() });
query.findOne((err, user) => {
if (err || user == undefined) {
res.status(404).send();
return;
}
bcrypt.compare(req.body.password, user.hash, (err, same) => {
if (err) {
res.status(404).send();
return;
}
if (same) {
try {
let info = {
sub: user._id,
name: user.fullname,
roles: "user",
scope: req.body.scope || "read"
}
let generateResult = generateAccessToken(info);
let access_token = generateResult.access_token;
let expires_in = generateResult.expires_in;
let refresh_token = generateRefreshToken(user._id);
addRefreshToken(refresh_token, req.body.client_id, user._id, (err, token) => {
if (err) {
throw err;
}
let result = {
auth: true,
token_type: "bearer",
access_token: access_token,
refresh_token: refresh_token,
scope: info.scope,
expires_in: expires_in
};
res.header("Cache-Control", "no-store");
res.header("Pragma", "no-cache");
res.status(200).json(result);
});
}
catch (err) {
console.log(err);
res.status(401).send({ auth: false, message: 'Failed to authenticate token.' });
}
}
else {
res.status(401).send({ auth: false, message: 'Failed to authenticate token.' });
}
});
});
}
function handleGrantTypeOfAuthorizationCode(req, res) {
jwt.verify(req.body.code, PUBLIC_KEY, (err, payload) => {
if (err) {
res.status(401).send({ auth: false, message: 'Failed to authenticate token.' });
return;
}
let code_challenge_method = "sha256";
let attemptCodeVerifierHash = crypto.createHash(code_challenge_method).update(req.body.code_verifier).digest("hex").toString();
let query = CodeChallenge.where({
userID: payload.sub,
hash: attemptCodeVerifierHash
});
query.findOneAndRemove((err, storeHash) => {
if (err || storeHash == undefined) {
res.status(401).send({ auth: false, message: 'Failed to authenticate token.' });
return;
}
try {
let info = {
sub: storeHash.userID,
name: payload.name,
roles: "user",
scope: req.body.scope || "read"
}
let generateResult = generateAccessToken(info, "1h");
let access_token = generateResult.access_token;
let expires_in = generateResult.expires_in;
let refresh_token = generateRefreshToken(storeHash.userID);
let result = {
token_type: "bearer",
refresh_token: refresh_token,
scope: info.scope,
expires_in: expires_in
}
addRefreshToken(refresh_token, req.body.client_id, storeHash.userID, (err, token) => {
if (err) {
console.log(err);
throw err;
}
result.auth = true;
result.access_token = access_token;
if (req.body.response_type == "id_token") {
generateIDToken(storeHash.userID, (err, token) => {
if (err) {
result.id_token = undefined;
}
else {
result.id_token = token;
}
res.header("Cache-Control", "no-store");
res.header("Pragma", "no-cache");
res.status(200).json(result);
});
}
else {
res.header("Cache-Control", "no-store");
res.header("Pragma", "no-cache");
res.status(200).json(result);
}
});
}
catch (err) {
console.log(err);
res.status(401).send({ auth: false, message: 'Failed to authenticate token.' });
}
});
});
}
function handleGrantTypeOfClientCredential(req, res) {
try {
let isValidSignature = isClientCredentialValid(req.body.client_id, req.body.client_secret);
if (isValidSignature == false) {
throw "Invalidate client secret key of client id : " + req.body.client_id;
}
let info = {
iss: HOST,
sub: req.body.client_id,
roles: "user",
scope: req.body.scope || "read",
}
let generateResult = generateAccessToken(info, "12h");
let access_token = generateResult.access_token;
let expires_in = generateResult.expires_in;
let result = {
auth: true,
token_type: "bearer",
access_token: access_token,
expires_in: expires_in,
scope: info.scope
};
res.header("Cache-Control", "no-store");
res.header("Pragma", "no-cache");
res.status(200).json(result);
}
catch (err) {
console.log(err);
res.status(403).json({ auth: false });
}
}
function handleGrantTypeOfRefreshToken(req, res) {
try {
if (req.body.client_secret) {
let isValidSignature = isClientCredentialValid(req.body.client_id, req.body.client_secret);
if (isValidSignature == false) {
throw "Invalidate client secret key of client id : " + req.body.client_id;
}
}
let secret = decryptRefreshToken(req.body.refresh_token);
if (secret == undefined) {
let message = "Invalid refresh token request has been push to this server...\n" + "Signature : " + req.body.refresh_token + "\nClient id: " + req.body.client_id;
throw message;
}
let userID = secret.split(".")[0];
rotateRefreshToken(req.body.client_id, req.body.refresh_token, userID, (err, token) => {
if (err || token == undefined) {
console.log(err);
res.status(403).send();
return;
}
let refresh_token = token;
let info = {
iss: HOST,
sub: req.body.user_id,
roles: "user",
scope: req.body.scope || "read",
}
let generateResult = generateAccessToken(info, "1h");
let access_token = generateResult.access_token;
let expires_in = generateResult.expires_in;
let result = {
auth: true,
token_type: "bearer",
access_token: access_token,
expires_in: expires_in,
refresh_token: refresh_token,
scope: info.scope
};
res.header("Cache-Control", "no-store");
res.header("Pragma", "no-cache");
res.status(200).json(result);
});
}
catch (err) {
console.log(err);
res.status(403).send();
}
}
function sendVerificationEmail(info, callback) {
let verifyToken = jwt.sign({
id: info.id,
hash: info.hash
}, PRIVATE_KEY, { algorithm: "RS256", expiresIn: "10m" });
let urlToVerifyAccount = HOST + "/user/verify?id=" + info.id +
"&hash=" + info.hash +
"&token=" + verifyToken;
if (info.redirect_uri) {
urlToVerifyAccount += "&redirect_uri=" + info.redirect_uri;
}
let html = "<b>Your account : " + info.username + "</b>" +
'<p>Click <a href="' + urlToVerifyAccount + '">here</a> to verify account.</p>';
let mailOptions = {
from: EMAIL,
to: info.username,
subject: SUBJECT.verify_account,
html: html
};
transporter.sendMail(mailOptions, (err, mailInfo) => {
callback(err, mailInfo);
});
}
function isClientCredentialValid(clientID, clientSignature) {
Client.findById({ _id: clientID }, (err, doc) => {
try {
if (err)
throw err;
const key = new NodeRSA({b: 512});
if (doc.publicKey == null || undefined)
return false;
key.importKey(doc.publicKey, "pkcs1-public");
key.setOptions({encryptionScheme: 'pkcs1'});
const secret = key.decryptPublic(clientSignature, "utf8");
const isValid = (doc.secretKey == secret);
return isValid;
}
catch (err) {
console.log(err);
return false;
}
});
}
//Login page (OAuth2.0 Authorization code flow)
app.get("/auth",
[
query("response_type").equals("code"),
query("client_id").isIn(CLIENT_WHITELIST),
query("code_challenge").exists(),
query("code_challenge_method").exists(),
query("state").exists(),
query("redirect_uri").exists(),
],
(req, res) => {
try {
validationResult(req).throw();
res.sendFile(path.join(__dirname + "/index.html"));
}
catch (error) {
res.status(400).send();
}
});
app.post("/auth",
[
body("username").isEmail(),
body("password").exists(),
body("redirect_uri").exists(),
body("code_challenge").exists(),
body("code_challenge_method").exists(),
body("state").exists()
],
(req, res) => {
try {
validationResult(req).throw();
let query = User.where({ username: req.body.username.toLowerCase() });
query.findOne((err, user) => {
if (err || user == undefined) {
res.status(401).send();
return;
}
bcrypt.compare(req.body.password, user.hash, (err, same) => {
if (err || !same) {
res.status(401).send();
return;
}
let newCodeChallenge = new CodeChallenge({
userID: user._id,
hash: req.body.code_challenge,
hashMethod: req.body.code_challenge_method,
expireDate: new Date(Date.now() + 60000)
});
newCodeChallenge.save((err) => {
if (err) {
console.log(err);
res.status(500).send();
return;
}
let authCode = jwt.sign({
sub: user._id,
iss: user.fullname,
}, PRIVATE_KEY, { algorithm: "RS256", expiresIn: "1m" });
let info = {
code: authCode,
state: req.body.state,
redirect_uri: req.body.redirect_uri,
};
res.status(200).json(info);
});
});
});
}
catch (error) {
console.log(error);
res.status(400).send();
}
});
//Register page
app.get("/signup", [
query("redirect_uri").optional()
],
(req, res) => {
req.session.redirect_uri = req.query.redirect_uri;
res.sendFile(path.join(__dirname + "/register.html"));
});
//Register new user
app.post("/signup", [
body("username").isEmail(),
body("password").isLength({ min: 5 }),
body("fullname").exists(),
body("redirect_uri").optional()
], (req, res) => {
try {
validationResult(req).throw();
let query = User.where({ username: req.body.username.toLowerCase() });
query.findOne((err, user) => {
if (err || user != undefined) {
res.status(409).send();
return;
}
bcrypt.genSalt(12, (err, salt) => {
if (err) {
throw 409;
}
else {
let info = {
username: req.body.username.toLowerCase(),
fullname: req.body.fullname,
joinDate: new Date().toISOString(),
verifyHash: uid(64),
isVerified: false
}
bcrypt.hash(req.body.password, salt, (err, hash) => {
if (err) {
throw 409;
}
else {
info.hash = hash;
let newUser = new User(info)
newUser.save((err) => {
if (err)
res.status(500).send();
res.status(201).send();
let verifyEmailInfo = {
id: newUser._id,
username: newUser.username,
hash: newUser.verifyHash,
}
if (req.body.redirect_uri) {
verifyEmailInfo.redirect_uri = req.body.redirect_uri;
}
else {
verifyEmailInfo.redirect_uri = req.session.redirect_uri;
}
sendVerificationEmail(verifyEmailInfo, (err, mailInfo) => {
if (err)
console.log(err);
});
});
}
});
}
});
});
}
catch (error) {
res.status(400).send();
}
});
//Sent a new verify account endpoint
app.post("/user/verify/new", [
body("username").isEmail(),
body("redirect_uri").optional()
],
(req, res) => {
try {
validationResult(req).throw();
let query = User.where({ username: req.body.username.toLowerCase() });
query.findOne((err, user) => {
if (err || user == undefined) {
res.status(404).send();
return;
}
if (user.isVerified) {
res.status(204).send();
return;
}
user.verifyHash = uid(64)
user.save((err) => {
if (err) {
res.status(500).send();
return;
}
res.status(200).send();
let verifyEmailInfo = {
id: user._id,
username: user.username,
hash: user.verifyHash,
redirect_uri: req.body.redirect_uri
}
sendVerificationEmail(verifyEmailInfo, (err, mailInfo) => {
if (err)
console.log(err);
});
});
});
}
catch (error) {
res.status(400).send();
}
});
//Verify Account (checks with verify token)
app.get("/user/verify", [
query("id").exists(),
query("hash").exists(),
query("token").exists(),
query("redirect").optional()
],
(req, res) => {
try {
validationResult(req).throw();
jwt.verify(req.query.token, PUBLIC_KEY, (err, payload) => {
let notValid = (err) || (payload.id != req.query.id) | (payload.hash != req.query.hash);
if (notValid) {
res.status(401).send();
return;
}
User.findById(req.query.id, (err, user) => {
if (err || user == undefined) {
res.status(404).send();
return;
}
user.verifyHash = undefined;
user.isVerified = true;
user.save((err) => {
if (err) {
res.status(500).send();
return;
}
if (req.query.redirect_uri) {
res.redirect(req.query.redirect_uri);
}
else {
res.status(200).send();
}
});
});
});
}
catch (error) {
res.status(400).send();
}
});
//TODO
//Forget password -> sent password reset url to email (along with short live token)
app.post("/user/forgetpassword", [
body("username").isEmail(),
body("redirect_uri").isURL()
], (req, res) => {
try {
validationResult(req).throw();
//TODO
//sent valid url along with token to specify email
//if account not found -> invalid 404
let isFound = users.find(element => element.username == req.body.email);
if (isFound) {
let token = jwt.sign({
userID: 0, //get from db
hash: uid(64)
}, PRIVATE_KEY, { algorithm: "RS256", expiresIn: "10m" })