src/auth.js

   1 'use strict';
   2
   3 var path = require('path'),
   4     safe = require('safetydance'),
   5     fs = require('fs'),
   6     bcrypt = require('bcryptjs'),
   7     uuid = require('uuid/v4'),
   8     ldapjs = require('ldapjs'),
   9     HttpError = require('connect-lastmile').HttpError,
  10     HttpSuccess = require('connect-lastmile').HttpSuccess,
  11     webdavErrors = require('webdav-server').v2.Errors;
  12
  13 const LDAP_URL = process.env.CLOUDRON_LDAP_URL;
  14 const LDAP_USERS_BASE_DN = process.env.CLOUDRON_LDAP_USERS_BASE_DN;
  15 const LOCAL_AUTH_FILE = path.resolve(process.env.LOCAL_AUTH_FILE || './.users.json');
  16 const TOKENSTORE_FILE = path.resolve(process.env.TOKENSTORE_FILE || './.tokens.json');
  17 const AUTH_METHOD = (LDAP_URL && LDAP_USERS_BASE_DN) ? 'ldap' : 'local';
  18 const LOGIN_TOKEN_PREFIX = 'login-';
  19 const API_TOKEN_PREFIX = 'api-';
  20
  21 if (AUTH_METHOD === 'ldap') {
  22     console.log('Using ldap auth');
  23 } else {
  24     console.log(`Using local auth file at: ${LOCAL_AUTH_FILE}`);
  25 }
  26
  27 var gConfig = {};
  28
  29 var tokenStore = {
  30     data: {},
  31     save: function () {
  32         try {
  33             fs.writeFileSync(TOKENSTORE_FILE, JSON.stringify(tokenStore.data), 'utf-8');
  34         } catch (e) {
  35             console.error(`Unable to save tokenstore file at ${TOKENSTORE_FILE}`, e);
  36         }
  37     },
  38     get: function (token, callback) {
  39         callback(tokenStore.data[token] ? null : 'not found', tokenStore.data[token]);
  40     },
  41     getApiTokens: function (callback) {
  42         callback(null, Object.keys(tokenStore.data).filter(function (t) { return t.indexOf(API_TOKEN_PREFIX) === 0; }))
  43     },
  44     set: function (token, user, callback) {
  45         tokenStore.data[token] = user;
  46         tokenStore.save();
  47         callback(null);
  48     },
  49     del: function (token, callback) {
  50         delete tokenStore.data[token];
  51         tokenStore.save();
  52         callback(null);
  53     }
  54 };
  55
  56 // load token store data if any
  57 try {
  58     console.log(`Using tokenstore file at: ${TOKENSTORE_FILE}`);
  59     tokenStore.data = JSON.parse(fs.readFileSync(TOKENSTORE_FILE, 'utf-8'));
  60 } catch (e) {
  61     // start with empty token store
  62 }
  63
  64 function verifyUser(username, password, callback) {
  65     if (AUTH_METHOD === 'ldap') {
  66         var ldapClient = ldapjs.createClient({ url: process.env.CLOUDRON_LDAP_URL });
  67         ldapClient.on('error', function (error) {
  68             console.error('LDAP error', error);
  69         });
  70
  71         ldapClient.bind(process.env.CLOUDRON_LDAP_BIND_DN, process.env.CLOUDRON_LDAP_BIND_PASSWORD, function (error) {
  72             if (error) return callback(error);
  73
  74             var filter = `(|(uid=${username})(mail=${username})(username=${username})(sAMAccountName=${username}))`;
  75             ldapClient.search(process.env.CLOUDRON_LDAP_USERS_BASE_DN, { filter: filter }, function (error, result) {
  76                 if (error) return callback(error);
  77
  78                 var items = [];
  79
  80                 result.on('searchEntry', function(entry) { items.push(entry.object); });
  81                 result.on('error', callback);
  82                 result.on('end', function (result) {
  83                     if (result.status !== 0 || items.length === 0) return callback('Invalid credentials');
  84
  85                     // pick the first found
  86                     var user = items[0];
  87
  88                     ldapClient.bind(user.dn, password, function (error) {
  89                         if (error) return callback('Invalid credentials');
  90
  91                         callback(null, { username: username });
  92                     });
  93                 });
  94             });
  95         });
  96     } else {
  97         var users = safe.JSON.parse(safe.fs.readFileSync(LOCAL_AUTH_FILE));
  98         if (!users || !users[username]) return callback('Invalid credentials');
  99
 100         bcrypt.compare(password, users[username].passwordHash, function (error, valid) {
 101             if (error || !valid) return callback('Invalid credentials');
 102
 103             callback(null, { username: username });
 104         });
 105     }
 106 }
 107
 108 exports.init = function (config) {
 109     gConfig = config;
 110 };
 111
 112 exports.login = function (req, res, next) {
 113     verifyUser(req.body.username, req.body.password, function (error, user) {
 114         if (error) return next(new HttpError(401, 'Invalid credentials'));
 115
 116         var accessToken = LOGIN_TOKEN_PREFIX + uuid();
 117
 118         tokenStore.set(accessToken, user, function (error) {
 119             if (error) return next(new HttpError(500, error));
 120
 121             next(new HttpSuccess(201, { accessToken: accessToken, user: user }));
 122         });
 123     });
 124 };
 125
 126 exports.verify = function (req, res, next) {
 127     var accessToken = req.query.access_token || req.body.accessToken;
 128
 129     tokenStore.get(accessToken, function (error, user) {
 130         if (error) return next(new HttpError(401, 'Invalid Access Token'));
 131
 132         req.user = user;
 133
 134         next();
 135     });
 136
 137 };
 138
 139 exports.verifyIfNeeded = function (req, res, next) {
 140     if (!gConfig.folderListingEnabled) return exports.verify(req, res, next);
 141     next();
 142 };
 143
 144 exports.logout = function (req, res, next) {
 145     var accessToken = req.query.access_token || req.body.accessToken;
 146
 147     tokenStore.del(accessToken, function (error) {
 148         if (error) console.error(error);
 149
 150         next(new HttpSuccess(200, {}));
 151     });
 152 };
 153
 154 exports.getProfile = function (req, res, next) {
 155     next(new HttpSuccess(200, { username: req.user.username }));
 156 };
 157
 158 exports.getTokens = function (req, res, next) {
 159     tokenStore.getApiTokens(function (error, result) {
 160         if (error) return next(new HttpError(500, error));
 161
 162         next(new HttpSuccess(200, { accessTokens: result }));
 163     });
 164 };
 165
 166 exports.createToken = function (req, res, next) {
 167     var accessToken = API_TOKEN_PREFIX + uuid();
 168
 169     tokenStore.set(accessToken, req.user, function (error) {
 170         if (error) return next(new HttpError(500, error));
 171
 172         next(new HttpSuccess(201, { accessToken: accessToken }));
 173     });
 174 };
 175
 176 exports.delToken = function (req, res, next) {
 177     tokenStore.del(req.params.token, function (error) {
 178         if (error) console.error(error);
 179
 180         next(new HttpSuccess(200, {}));
 181     });
 182 };
 183
 184 // webdav usermanager
 185 exports.WebdavUserManager = WebdavUserManager;
 186
 187 // This implements the required interface only for the Basic Authentication for webdav-server
 188 function WebdavUserManager() {};
 189
 190 WebdavUserManager.prototype.getDefaultUser = function (callback) {
 191     // this is only a dummy user, since we always require authentication
 192     var user = {
 193         username: 'DefaultUser',
 194         password: null,
 195         isAdministrator: false,
 196         isDefaultUser: true,
 197         uid: 'DefaultUser'
 198     };
 199
 200     callback(user);
 201 };
 202
 203 WebdavUserManager.prototype.getUserByNamePassword = function (username, password, callback) {
 204     verifyUser(username, password, function (error, user) {
 205         if (error) return callback(webdavErrors.UserNotFound);
 206
 207         callback(null, {
 208             username: user.username,
 209             isAdministrator: true,
 210             isDefaultUser: false,
 211             uid: user.username
 212         });
 213     });
 214 };