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483 lines
15 KiB
483 lines
15 KiB
const passport = require('passport')
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const passportJWT = require('passport-jwt')
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const _ = require('lodash')
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const jwt = require('jsonwebtoken')
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const ms = require('ms')
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const { DateTime } = require('luxon')
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const Promise = require('bluebird')
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const crypto = Promise.promisifyAll(require('crypto'))
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const pem2jwk = require('pem-jwk').pem2jwk
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const securityHelper = require('../helpers/security')
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/* global WIKI */
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module.exports = {
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strategies: {},
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guest: {
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cacheExpiration: DateTime.utc().minus({ days: 1 })
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},
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groups: {},
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validApiKeys: [],
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revocationList: require('./cache').init(),
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/**
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* Initialize the authentication module
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*/
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init() {
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this.passport = passport
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passport.serializeUser((user, done) => {
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done(null, user.id)
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})
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passport.deserializeUser(async (id, done) => {
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try {
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const user = await WIKI.models.users.query().findById(id).withGraphFetched('groups').modifyGraph('groups', builder => {
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builder.select('groups.id', 'permissions')
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})
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if (user) {
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done(null, user)
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} else {
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done(new Error(WIKI.lang.t('auth:errors:usernotfound')), null)
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}
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} catch (err) {
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done(err, null)
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}
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})
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this.reloadGroups()
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this.reloadApiKeys()
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return this
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},
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/**
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* Load authentication strategies
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*/
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async activateStrategies () {
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try {
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// Unload any active strategies
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WIKI.auth.strategies = {}
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const currentStrategies = _.keys(passport._strategies)
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_.pull(currentStrategies, 'session')
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_.forEach(currentStrategies, stg => { passport.unuse(stg) })
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// Load JWT
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passport.use('jwt', new passportJWT.Strategy({
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jwtFromRequest: securityHelper.extractJWT,
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secretOrKey: WIKI.config.certs.public,
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audience: WIKI.config.auth.audience,
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issuer: 'urn:wiki.js',
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algorithms: ['RS256']
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}, (jwtPayload, cb) => {
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cb(null, jwtPayload)
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}))
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// Load enabled strategies
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const enabledStrategies = await WIKI.models.authentication.getStrategies()
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for (let idx in enabledStrategies) {
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const stg = enabledStrategies[idx]
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try {
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const strategy = require(`../modules/authentication/${stg.strategyKey}/authentication.js`)
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stg.config.callbackURL = `${WIKI.config.host}/login/${stg.key}/callback`
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stg.config.key = stg.key;
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strategy.init(passport, stg.config)
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strategy.config = stg.config
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WIKI.auth.strategies[stg.key] = {
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...strategy,
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...stg
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}
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WIKI.logger.info(`Authentication Strategy ${stg.displayName}: [ OK ]`)
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} catch (err) {
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WIKI.logger.error(`Authentication Strategy ${stg.displayName} (${stg.key}): [ FAILED ]`)
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WIKI.logger.error(err)
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}
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}
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} catch (err) {
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WIKI.logger.error(`Failed to initialize Authentication Strategies: [ ERROR ]`)
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WIKI.logger.error(err)
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}
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},
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/**
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* Authenticate current request
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*
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* @param {Express Request} req
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* @param {Express Response} res
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* @param {Express Next Callback} next
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*/
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authenticate (req, res, next) {
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WIKI.auth.passport.authenticate('jwt', {session: false}, async (err, user, info) => {
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if (err) { return next() }
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let mustRevalidate = false
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// Expired but still valid within N days, just renew
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if (info instanceof Error && info.name === 'TokenExpiredError') {
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const expiredDate = (info.expiredAt instanceof Date) ? info.expiredAt.toISOString() : info.expiredAt
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if (DateTime.utc().minus(ms(WIKI.config.auth.tokenRenewal)) < DateTime.fromISO(expiredDate)) {
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mustRevalidate = true
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}
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}
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// Check if user / group is in revocation list
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if (user && !user.api && !mustRevalidate) {
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const uRevalidate = WIKI.auth.revocationList.get(`u${_.toString(user.id)}`)
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if (uRevalidate && user.iat < uRevalidate) {
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mustRevalidate = true
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} else if (DateTime.fromSeconds(user.iat) <= WIKI.startedAt) { // Prevent new / restarted instance from allowing revoked tokens
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mustRevalidate = true
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} else {
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for (const gid of user.groups) {
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const gRevalidate = WIKI.auth.revocationList.get(`g${_.toString(gid)}`)
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if (gRevalidate && user.iat < gRevalidate) {
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mustRevalidate = true
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break
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}
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}
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}
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}
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// Revalidate and renew token
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if (mustRevalidate) {
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const jwtPayload = jwt.decode(securityHelper.extractJWT(req))
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try {
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const newToken = await WIKI.models.users.refreshToken(jwtPayload.id)
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user = newToken.user
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user.permissions = user.getGlobalPermissions()
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user.groups = user.getGroups()
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req.user = user
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// Try headers, otherwise cookies for response
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if (req.get('content-type') === 'application/json') {
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res.set('new-jwt', newToken.token)
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} else {
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res.cookie('jwt', newToken.token, { expires: DateTime.utc().plus({ days: 365 }).toJSDate() })
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}
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} catch (errc) {
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WIKI.logger.warn(errc)
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return next()
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}
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}
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// JWT is NOT valid, set as guest
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if (!user) {
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if (WIKI.auth.guest.cacheExpiration <= DateTime.utc()) {
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WIKI.auth.guest = await WIKI.models.users.getGuestUser()
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WIKI.auth.guest.cacheExpiration = DateTime.utc().plus({ minutes: 1 })
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}
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req.user = WIKI.auth.guest
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return next()
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}
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// Process API tokens
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if (_.has(user, 'api')) {
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if (!WIKI.config.api.isEnabled) {
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return next(new Error('API is disabled. You must enable it from the Administration Area first.'))
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} else if (_.includes(WIKI.auth.validApiKeys, user.api)) {
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req.user = {
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id: 1,
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email: 'api@localhost',
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name: 'API',
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pictureUrl: null,
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timezone: 'America/New_York',
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localeCode: 'en',
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permissions: _.get(WIKI.auth.groups, `${user.grp}.permissions`, []),
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groups: [user.grp],
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getGlobalPermissions () {
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return req.user.permissions
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},
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getGroups () {
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return req.user.groups
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}
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}
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return next()
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} else {
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return next(new Error('API Key is invalid or was revoked.'))
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}
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}
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// JWT is valid
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req.logIn(user, { session: false }, (errc) => {
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if (errc) { return next(errc) }
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next()
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})
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})(req, res, next)
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},
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/**
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* Check if user has access to resource
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*
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* @param {User} user
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* @param {Array<String>} permissions
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* @param {String|Boolean} path
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*/
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checkAccess(user, permissions = [], page = false) {
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const userPermissions = user.permissions ? user.permissions : user.getGlobalPermissions()
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// System Admin
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if (_.includes(userPermissions, 'manage:system')) {
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return true
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}
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// Check Global Permissions
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if (_.intersection(userPermissions, permissions).length < 1) {
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return false
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}
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// Skip if no page rule to check
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if (!page) {
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return true
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}
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// Check Page Rules
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if (user.groups) {
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let checkState = {
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deny: false,
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match: false,
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specificity: ''
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}
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user.groups.forEach(grp => {
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const grpId = _.isObject(grp) ? _.get(grp, 'id', 0) : grp
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_.get(WIKI.auth.groups, `${grpId}.pageRules`, []).forEach(rule => {
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if (rule.locales && rule.locales.length > 0) {
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if (!rule.locales.includes(page.locale)) { return }
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}
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if (_.intersection(rule.roles, permissions).length > 0) {
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switch (rule.match) {
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case 'START':
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if (_.startsWith(`/${page.path}`, `/${rule.path}`)) {
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checkState = this._applyPageRuleSpecificity({ rule, checkState, higherPriority: ['END', 'REGEX', 'EXACT', 'TAG'] })
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}
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break
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case 'END':
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if (_.endsWith(page.path, rule.path)) {
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checkState = this._applyPageRuleSpecificity({ rule, checkState, higherPriority: ['REGEX', 'EXACT', 'TAG'] })
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}
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break
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case 'REGEX':
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const reg = new RegExp(rule.path)
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if (reg.test(page.path)) {
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checkState = this._applyPageRuleSpecificity({ rule, checkState, higherPriority: ['EXACT', 'TAG'] })
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}
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break
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case 'TAG':
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_.get(page, 'tags', []).forEach(tag => {
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if (tag.tag === rule.path) {
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checkState = this._applyPageRuleSpecificity({
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rule,
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checkState,
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higherPriority: ['EXACT']
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})
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}
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})
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break
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case 'EXACT':
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if (`/${page.path}` === `/${rule.path}`) {
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checkState = this._applyPageRuleSpecificity({ rule, checkState, higherPriority: [] })
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}
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break
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}
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}
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})
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})
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return (checkState.match && !checkState.deny)
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}
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return false
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},
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/**
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* Check for exclusive permissions (contain any X permission(s) but not any Y permission(s))
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*
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* @param {User} user
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* @param {Array<String>} includePermissions
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* @param {Array<String>} excludePermissions
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*/
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checkExclusiveAccess(user, includePermissions = [], excludePermissions = []) {
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const userPermissions = user.permissions ? user.permissions : user.getGlobalPermissions()
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// Check Inclusion Permissions
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if (_.intersection(userPermissions, includePermissions).length < 1) {
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return false
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}
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// Check Exclusion Permissions
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if (_.intersection(userPermissions, excludePermissions).length > 0) {
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return false
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}
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return true
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},
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/**
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* Check and apply Page Rule specificity
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*
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* @access private
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*/
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_applyPageRuleSpecificity ({ rule, checkState, higherPriority = [] }) {
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if (rule.path.length === checkState.specificity.length) {
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// Do not override higher priority rules
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if (_.includes(higherPriority, checkState.match)) {
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return checkState
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}
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// Do not override a previous DENY rule with same match
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if (rule.match === checkState.match && checkState.deny && !rule.deny) {
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return checkState
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}
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} else if (rule.path.length < checkState.specificity.length) {
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// Do not override higher specificity rules
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return checkState
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}
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return {
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deny: rule.deny,
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match: rule.match,
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specificity: rule.path
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}
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},
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/**
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* Reload Groups from DB
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*/
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async reloadGroups () {
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const groupsArray = await WIKI.models.groups.query()
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this.groups = _.keyBy(groupsArray, 'id')
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WIKI.auth.guest.cacheExpiration = DateTime.utc().minus({ days: 1 })
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},
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/**
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* Reload valid API Keys from DB
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*/
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async reloadApiKeys () {
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const keys = await WIKI.models.apiKeys.query().select('id').where('isRevoked', false).andWhere('expiration', '>', DateTime.utc().toISO())
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this.validApiKeys = _.map(keys, 'id')
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},
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/**
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* Generate New Authentication Public / Private Key Certificates
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*/
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async regenerateCertificates () {
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WIKI.logger.info('Regenerating certificates...')
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_.set(WIKI.config, 'sessionSecret', (await crypto.randomBytesAsync(32)).toString('hex'))
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const certs = crypto.generateKeyPairSync('rsa', {
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modulusLength: 2048,
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publicKeyEncoding: {
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type: 'pkcs1',
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format: 'pem'
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},
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privateKeyEncoding: {
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type: 'pkcs1',
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format: 'pem',
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cipher: 'aes-256-cbc',
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passphrase: WIKI.config.sessionSecret
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}
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})
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_.set(WIKI.config, 'certs', {
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jwk: pem2jwk(certs.publicKey),
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public: certs.publicKey,
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private: certs.privateKey
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})
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await WIKI.configSvc.saveToDb([
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'certs',
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'sessionSecret'
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])
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await WIKI.auth.activateStrategies()
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WIKI.events.outbound.emit('reloadAuthStrategies')
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WIKI.logger.info('Regenerated certificates: [ COMPLETED ]')
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},
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/**
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* Reset Guest User
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*/
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async resetGuestUser() {
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WIKI.logger.info('Resetting guest account...')
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const guestGroup = await WIKI.models.groups.query().where('id', 2).first()
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await WIKI.models.users.query().delete().where({
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providerKey: 'local',
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email: 'guest@example.com'
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}).orWhere('id', 2)
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const guestUser = await WIKI.models.users.query().insert({
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id: 2,
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provider: 'local',
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email: 'guest@example.com',
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name: 'Guest',
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password: '',
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locale: 'en',
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defaultEditor: 'markdown',
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tfaIsActive: false,
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isSystem: true,
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isActive: true,
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isVerified: true
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})
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await guestUser.$relatedQuery('groups').relate(guestGroup.id)
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WIKI.logger.info('Guest user has been reset: [ COMPLETED ]')
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},
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/**
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* Subscribe to HA propagation events
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*/
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subscribeToEvents() {
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WIKI.events.inbound.on('reloadGroups', () => {
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WIKI.auth.reloadGroups()
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})
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WIKI.events.inbound.on('reloadApiKeys', () => {
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WIKI.auth.reloadApiKeys()
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})
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WIKI.events.inbound.on('reloadAuthStrategies', () => {
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WIKI.auth.activateStrategies()
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})
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WIKI.events.inbound.on('addAuthRevoke', (args) => {
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WIKI.auth.revokeUserTokens(args)
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})
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},
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/**
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* Get all user permissions for a specific page
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*/
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getEffectivePermissions (req, page) {
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return {
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comments: {
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read: WIKI.config.features.featurePageComments ? WIKI.auth.checkAccess(req.user, ['read:comments'], page) : false,
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write: WIKI.config.features.featurePageComments ? WIKI.auth.checkAccess(req.user, ['write:comments'], page) : false,
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manage: WIKI.config.features.featurePageComments ? WIKI.auth.checkAccess(req.user, ['manage:comments'], page) : false
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},
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history: {
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read: WIKI.auth.checkAccess(req.user, ['read:history'], page)
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},
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source: {
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read: WIKI.auth.checkAccess(req.user, ['read:source'], page)
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},
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pages: {
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read: WIKI.auth.checkAccess(req.user, ['read:pages'], page),
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write: WIKI.auth.checkAccess(req.user, ['write:pages'], page),
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manage: WIKI.auth.checkAccess(req.user, ['manage:pages'], page),
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delete: WIKI.auth.checkAccess(req.user, ['delete:pages'], page),
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script: WIKI.auth.checkAccess(req.user, ['write:scripts'], page),
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style: WIKI.auth.checkAccess(req.user, ['write:styles'], page)
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},
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system: {
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manage: WIKI.auth.checkAccess(req.user, ['manage:system'], page)
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}
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}
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},
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/**
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* Add user / group ID to JWT revocation list, forcing all requests to be validated against the latest permissions
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*/
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revokeUserTokens ({ id, kind = 'u' }) {
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WIKI.auth.revocationList.set(`${kind}${_.toString(id)}`, Math.round(DateTime.utc().minus({ seconds: 5 }).toSeconds()), Math.ceil(ms(WIKI.config.auth.tokenExpiration) / 1000))
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}
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}
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