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'use strict';
var passport = require('passport'),
path = require('path'),
safe = require('safetydance'),
fs = require('fs'),
bcrypt = require('bcryptjs'),
uuid = require('uuid/v4'),
BearerStrategy = require('passport-http-bearer').Strategy,
ldapjs = require('ldapjs'),
HttpError = require('connect-lastmile').HttpError,
HttpSuccess = require('connect-lastmile').HttpSuccess,
webdavErrors = require('webdav-server').v2.Errors;
const LDAP_URL = process.env.LDAP_URL;
const LDAP_USERS_BASE_DN = process.env.LDAP_USERS_BASE_DN;
const LOCAL_AUTH_FILE = path.resolve(process.env.LOCAL_AUTH_FILE || './.users.json');
const TOKENSTORE_FILE = path.resolve(process.env.TOKENSTORE_FILE || './.tokens.json');
const AUTH_METHOD = (LDAP_URL && LDAP_USERS_BASE_DN) ? 'ldap' : 'local';
if (AUTH_METHOD === 'ldap') {
console.log('Use ldap auth');
} else {
console.log(`Use local auth file ${LOCAL_AUTH_FILE}`);
}
var tokenStore = {
data: {},
save: function () {
try {
fs.writeFileSync(TOKENSTORE_FILE, JSON.stringify(tokenStore.data), 'utf-8');
} catch (e) {
console.error(`Unable to save tokenstore file at ${TOKENSTORE_FILE}`, e);
}
},
get: function (token, callback) {
callback(tokenStore.data[token] ? null : 'not found', tokenStore.data[token]);
},
set: function (token, data, callback) {
tokenStore.data[token] = data;
tokenStore.save();
callback(null);
},
del: function (token, callback) {
delete tokenStore.data[token];
tokenStore.save();
callback(null);
}
};
// load token store data if any
try {
console.log(`Using tokenstore file: ${TOKENSTORE_FILE}`);
tokenStore.data = JSON.parse(fs.readFileSync(TOKENSTORE_FILE, 'utf-8'));
} catch (e) {
// start with empty token store
}
function issueAccessToken() {
return function (req, res, next) {
var accessToken = uuid();
tokenStore.set(accessToken, req.user, function (error) {
if (error) return next(new HttpError(500, error));
next(new HttpSuccess(201, { accessToken: accessToken, user: req.user }));
});
};
}
passport.serializeUser(function (user, done) {
console.log('serializeUser', user);
done(null, user.uid);
});
passport.deserializeUser(function (id, done) {
console.log('deserializeUser', id);
done(null, { uid: id });
});
function verifyUser(username, password, callback) {
if (AUTH_METHOD === 'ldap') {
var ldapClient = ldapjs.createClient({ url: process.env.LDAP_URL });
ldapClient.on('error', function (error) {
console.error('LDAP error', error);
});
ldapClient.bind(process.env.LDAP_BIND_DN, process.env.LDAP_BIND_PASSWORD, function (error) {
if (error) return callback(error);
var filter = `(|(uid=${username})(mail=${username})(username=${username})(sAMAccountName=${username}))`;
ldapClient.search(process.env.LDAP_USERS_BASE_DN, { filter: filter }, function (error, result) {
if (error) return callback(error);
var items = [];
result.on('searchEntry', function(entry) { items.push(entry.object); });
result.on('error', callback);
result.on('end', function (result) {
if (result.status !== 0 || items.length === 0) return callback('Invalid credentials');
// pick the first found
var user = items[0];
ldapClient.bind(user.dn, password, function (error) {
if (error) return callback('Invalid credentials');
callback(null, { username: username });
});
});
});
});
} else {
var users = safe.JSON.parse(safe.fs.readFileSync(LOCAL_AUTH_FILE));
if (!users || !users[username]) return callback('Invalid credentials');
bcrypt.compare(password, users[username].passwordHash, function (error, valid) {
if (error || !valid) return callback('Invalid credentials');
callback(null, { username: username });
});
}
}
exports.login = [
function (req, res, next) {
verifyUser(req.body.username, req.body.password, function (error, user) {
if (error) return next(new HttpError(401, 'Invalid credentials'));
req.user = user;
next();
});
},
issueAccessToken()
];
exports.verify = passport.authenticate('bearer', { session: false });
passport.use(new BearerStrategy(function (token, done) {
tokenStore.get(token, function (error, result) {
if (error) {
console.error(error);
return done(null, false);
}
done(null, result, { accessToken: token });
});
}));
exports.logout = function (req, res, next) {
tokenStore.del(req.authInfo.accessToken, function (error) {
if (error) console.error(error);
next(new HttpSuccess(200, {}));
});
};
exports.getProfile = function (req, res, next) {
next(new HttpSuccess(200, { username: req.user.username }));
};
// webdav usermanager
exports.WebdavUserManager = WebdavUserManager;
// This implements the required interface only for the Basic Authentication for webdav-server
function WebdavUserManager() {};
WebdavUserManager.prototype.getDefaultUser = function (callback) {
// this is only a dummy user, since we always require authentication
var user = {
username: 'DefaultUser',
password: null,
isAdministrator: false,
isDefaultUser: true,
uid: 'DefaultUser'
};
callback(user);
};
WebdavUserManager.prototype.getUserByNamePassword = function (username, password, callback) {
verifyUser(username, password, function (error, user) {
if (error) return callback(webdavErrors.UserNotFound);
callback(null, {
username: user.username,
isAdministrator: true,
isDefaultUser: false,
uid: user.username
});
});
};
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