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