src/auth.js

   1 'use strict';
   2
   3 var passport = require('passport'),
   4     path = require('path'),
   5     safe = require('safetydance'),
   6     bcrypt = require('bcryptjs'),
   7     uuid = require('uuid/v4'),
   8     redis = require('redis'),
   9     BearerStrategy = require('passport-http-bearer').Strategy,
  10     LdapStrategy = require('passport-ldapjs').Strategy,
  11     HttpError = require('connect-lastmile').HttpError,
  12     HttpSuccess = require('connect-lastmile').HttpSuccess;
  13
  14 var LOCAL_AUTH_FILE = path.resolve(process.env.LOCAL_AUTH_FILE || './.users.json');
  15
  16 var tokenStore = {
  17     data: {},
  18     get: function (token, callback) {
  19         callback(tokenStore.data[token] ? null : 'not found', tokenStore.data[token]);
  20     },
  21     set: function (token, data, callback) {
  22         tokenStore.data[token] = data;
  23         callback(null);
  24     },
  25     del: function (token, callback) {
  26         delete tokenStore.data[token];
  27         callback(null);
  28     }
  29 };
  30
  31 if (process.env.REDIS_URL) {
  32     console.log('Enable redis token store');
  33
  34     var redisClient = redis.createClient(process.env.REDIS_URL);
  35
  36     if (process.env.REDIS_PASSWORD) {
  37         console.log('Using redis auth');
  38         redisClient.auth(process.env.REDIS_PASSWORD);
  39     }
  40
  41     // overwrite the tokenStore api
  42     tokenStore.get = function (token, callback) {
  43         redisClient.get(token, function (error, result) {
  44             callback(error || null, safe.JSON.parse(result));
  45         });
  46     };
  47     tokenStore.set = function (token, data, callback) {
  48         redisClient.set(token, JSON.stringify(data), callback);
  49     };
  50     tokenStore.del = redisClient.del.bind(redisClient);
  51 } else {
  52     console.log('Use in-memory token store');
  53 }
  54
  55 function issueAccessToken() {
  56     return function (req, res, next) {
  57         var accessToken = uuid();
  58
  59         tokenStore.set(accessToken, req.user, function (error) {
  60             if (error) return next(new HttpError(500, error));
  61             next(new HttpSuccess(201, { accessToken: accessToken, user: req.user }));
  62         });
  63     };
  64 }
  65
  66 passport.serializeUser(function (user, done) {
  67     console.log('serializeUser', user);
  68     done(null, user.uid);
  69 });
  70
  71 passport.deserializeUser(function (id, done) {
  72     console.log('deserializeUser', id);
  73     done(null, { uid: id });
  74 });
  75
  76 var LDAP_URL = process.env.LDAP_URL;
  77 var LDAP_USERS_BASE_DN = process.env.LDAP_USERS_BASE_DN;
  78
  79 if (LDAP_URL && LDAP_USERS_BASE_DN) {
  80     console.log('Enable ldap auth');
  81
  82     exports.login = [ passport.authenticate('ldap'), issueAccessToken() ];
  83 } else {
  84     console.log('Use local user file:', LOCAL_AUTH_FILE);
  85
  86     exports.login = [
  87         function (req, res, next) {
  88             var users = safe.JSON.parse(safe.fs.readFileSync(LOCAL_AUTH_FILE));
  89             if (!users) return res.send(401);
  90             if (!users[req.body.username]) return res.send(401);
  91
  92             bcrypt.compare(req.body.password, users[req.body.username].passwordHash, function (error, valid) {
  93                 if (error || !valid) return res.send(401);
  94
  95                 req.user = {
  96                     username: req.body.username
  97                 };
  98
  99                 next();
 100             });
 101         },
 102         issueAccessToken()
 103     ];
 104 }
 105
 106 var opts = {
 107     server: {
 108         url: LDAP_URL,
 109     },
 110     base: LDAP_USERS_BASE_DN,
 111     search: {
 112         filter: '(|(username={{username}})(mail={{username}}))',
 113         attributes: ['displayname', 'username', 'mail', 'uid'],
 114         scope: 'sub'
 115     },
 116     uidTag: 'cn',
 117     usernameField: 'username',
 118     passwordField: 'password',
 119 };
 120
 121 passport.use(new LdapStrategy(opts, function (profile, done) {
 122     done(null, profile);
 123 }));
 124
 125 exports.verify = passport.authenticate('bearer', { session: false });
 126
 127 passport.use(new BearerStrategy(function (token, done) {
 128     tokenStore.get(token, function (error, result) {
 129         if (error) {
 130             console.error(error);
 131             return done(null, false);
 132         }
 133
 134         done(null, result, { accessToken: token });
 135     });
 136 }));
 137
 138 exports.logout = function (req, res, next) {
 139     tokenStore.del(req.authInfo.accessToken, function (error) {
 140         if (error) console.error(error);
 141
 142         next(new HttpSuccess(200, {}));
 143     });
 144 };
 145
 146 exports.getProfile = function (req, res, next) {
 147     next(new HttpSuccess(200, { username: req.user.username }));
 148 };