/**
* Copyright JS Foundation and other contributors, http://js.foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
/**
* @mixin @node-red/editor-api_auth
*/
var passport = require("passport");
var oauth2orize = require("oauth2orize");
var strategies = require("./strategies");
var Tokens = require("./tokens");
var Users = require("./users");
var permissions = require("./permissions");
var theme = require("../editor/theme");
var settings = null;
var log = require("@node-red/util").log; // TODO: separate module
passport.use(strategies.bearerStrategy.BearerStrategy);
passport.use(strategies.clientPasswordStrategy.ClientPasswordStrategy);
passport.use(strategies.anonymousStrategy);
passport.use(strategies.tokensStrategy);
var server = oauth2orize.createServer();
server.exchange(oauth2orize.exchange.password(strategies.passwordTokenExchange));
function init(_settings,storage) {
settings = _settings;
if (settings.adminAuth) {
var mergedAdminAuth = Object.assign({}, settings.adminAuth, settings.adminAuth.module);
Users.init(mergedAdminAuth);
Tokens.init(mergedAdminAuth,storage);
}
}
/**
* Returns an Express middleware function that ensures the user making a request
* has the necessary permission.
*
* @param {String} permission - the permission required for the request, such as `flows.write`
* @return {Function} - an Express middleware
* @memberof @node-red/editor-api_auth
*/
function needsPermission(permission) {
return function(req,res,next) {
if (settings && settings.adminAuth) {
return passport.authenticate(['bearer','tokens','anon'],{ session: false })(req,res,function() {
if (!req.user) {
return next();
}
if (permissions.hasPermission(req.authInfo.scope,permission)) {
return next();
}
log.audit({event: "permission.fail", permissions: permission},req);
return res.status(401).end();
});
} else {
next();
}
}
}
function ensureClientSecret(req,res,next) {
if (!req.body.client_secret) {
req.body.client_secret = 'not_available';
}
next();
}
function authenticateClient(req,res,next) {
return passport.authenticate(['oauth2-client-password'], {session: false})(req,res,next);
}
function getToken(req,res,next) {
return server.token()(req,res,next);
}
async function login(req,res) {
var response = {};
if (settings.adminAuth) {
var mergedAdminAuth = Object.assign({}, settings.adminAuth, settings.adminAuth.module);
if (mergedAdminAuth.type === "credentials") {
response = {
"type":"credentials",
"prompts":[{id:"username",type:"text",label:"user.username"},{id:"password",type:"password",label:"user.password"}]
}
} else if (mergedAdminAuth.type === "strategy") {
var urlPrefix = (settings.httpAdminRoot||"").replace(/\/$/,"");
if (urlPrefix.length > 0) {
urlPrefix += "/";
}
response = {
"type":"strategy"
}
if (mergedAdminAuth.strategy.autoLogin) {
response.autoLogin = true
response.loginRedirect = urlPrefix + "auth/strategy"
}
response.prompts = [
{type:"button",label:mergedAdminAuth.strategy.label, url: urlPrefix + "auth/strategy"}
]
if (mergedAdminAuth.strategy.icon) {
response.prompts[0].icon = mergedAdminAuth.strategy.icon;
}
if (mergedAdminAuth.strategy.image) {
response.prompts[0].image = theme.serveFile('/login/',mergedAdminAuth.strategy.image);
}
}
let themeContext = await theme.context();
if (themeContext.login && themeContext.login.image) {
response.image = themeContext.login.image;
}
}
res.json(response);
}
function revoke(req,res) {
var token = req.body.token;
// TODO: audit log
Tokens.revoke(token).then(function() {
log.audit({event: "auth.login.revoke"},req);
if (settings.editorTheme && settings.editorTheme.logout && settings.editorTheme.logout.redirect) {
res.json({redirect:settings.editorTheme.logout.redirect});
} else {
res.status(200).end();
}
});
}
function completeVerify(profile,done) {
Users.authenticate(profile).then(function(user) {
if (user) {
Tokens.create(user.username,"node-red-editor",user.permissions).then(function(tokens) {
log.audit({event: "auth.login",user,username:user.username,scope:user.permissions});
user.tokens = tokens;
done(null,user);
});
} else {
log.audit({event: "auth.login.fail.oauth",username:typeof profile === "string"?profile:profile.username});
done(null,false);
}
});
}
function genericStrategy(adminApp,strategy) {
var crypto = require("crypto")
var session = require('express-session')
var MemoryStore = require('memorystore')(session)
adminApp.use(session({
// As the session is only used across the life-span of an auth
// hand-shake, we can use a instance specific random string
secret: crypto.randomBytes(20).toString('hex'),
resave: false,
saveUninitialized: false,
store: new MemoryStore({
checkPeriod: 86400000 // prune expired entries every 24h
})
}));
//TODO: all passport references ought to be in ./auth
adminApp.use(passport.initialize());
adminApp.use(passport.session());
var options = strategy.options;
var verify = function() {
var originalDone = arguments[arguments.length-1];
if (options.verify) {
var args = Array.from(arguments);
args[args.length-1] = function(err,profile) {
if (err) {
return originalDone(err);
} else {
return completeVerify(profile,originalDone);
}
};
options.verify.apply(this,args);
} else {
var profile = arguments[arguments.length - 2];
return completeVerify(profile,originalDone);
}
};
// Give our callback the same arity as the original one from options
if (options.verify) {
Object.defineProperty(verify, "length", { value: options.verify.length })
}
passport.use(new strategy.strategy(options, verify));
adminApp.get('/auth/strategy',
passport.authenticate(strategy.name, {session:false,
failureMessage: true,
failureRedirect: settings.httpAdminRoot
}),
completeGenerateStrategyAuth,
handleStrategyError
);
var callbackMethodFunc = adminApp.get;
if (/^post$/i.test(options.callbackMethod)) {
callbackMethodFunc = adminApp.post;
}
callbackMethodFunc.call(adminApp,'/auth/strategy/callback',
passport.authenticate(strategy.name, {
session:false,
failureMessage: true,
failureRedirect: settings.httpAdminRoot
}),
completeGenerateStrategyAuth,
handleStrategyError
);
}
function completeGenerateStrategyAuth(req,res) {
var tokens = req.user.tokens;
delete req.user.tokens;
// Successful authentication, redirect home.
res.redirect(settings.httpAdminRoot + '?access_token='+tokens.accessToken);
}
function handleStrategyError(err, req, res, next) {
if (res.headersSent) {
return next(err)
}
log.audit({event: "auth.login.fail.oauth",error:err.toString()});
res.redirect(settings.httpAdminRoot + '?session_message='+err.toString());
}
module.exports = {
init: init,
needsPermission: needsPermission,
ensureClientSecret: ensureClientSecret,
authenticateClient: authenticateClient,
getToken: getToken,
errorHandler: function(err,req,res,next) {
//TODO: audit log statment
//console.log(err.stack);
//log.log({level:"audit",type:"auth",msg:err.toString()});
return server.errorHandler()(err,req,res,next);
},
login: login,
revoke: revoke,
genericStrategy: genericStrategy
}