Make new LDAP options backward compatible
Also draft some kind of plugin system for auth, although it essentially consists in writing a function and there is no mechanism to automatically fallback from one auth to another
This commit is contained in:
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19710b90c0
commit
cfa6db10c7
@ -371,15 +371,22 @@ module.exports = {
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// 3. Lounge tries to connect a second time, but this time using the user's
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// DN and password. Auth is validated iff this connection is successful.
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//
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// The search query takes a couple of parameters:
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// - A base DN. Only children nodes of this DN will be likely to be returned
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// - A search scope (see LDAP documentation)
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// - The query itself, build as (&(<primaryKey>=<username>) <filter>)
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// The search query takes a couple of parameters in `searchDN`:
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// - a base DN `searchDN/base`. Only children nodes of this DN will be likely
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// to be returned;
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// - a search scope `searchDN/scope` (see LDAP documentation);
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// - the query itself, build as (&(<primaryKey>=<username>) <filter>)
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// where <username> is the user name provided in the log in request,
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// <primaryKey> is provided by the config and <fitler> is a filtering complement
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// also given in the config, to filter for instance only for nodes of type
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// inetOrgPerson, or whatever LDAP search allows.
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//
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// Alternatively, you can specify the `bindDN` parameter. This will make the lounge
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// ignore searchDN options and assume that the user DN is always:
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// <bindDN>,<primaryKey>=<username>
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// where <username> is the user name provided in the log in request, and <bindDN>
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// and <primaryKey> are provided by the config.
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//
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ldap: {
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//
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// Enable LDAP user authentication
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@ -399,33 +406,23 @@ module.exports = {
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//
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// LDAP connection tls options (only used if scheme is ldaps://)
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//
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// @type object (see nodejs' tls.connect() options)
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// @type object (see nodejs' tls.connect() options)
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// @default {}
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//
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// Example:
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// You can use this option in order to force the use of IPv6:
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// {
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// host: 'my::ip::v6'
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// servername: 'ldaps://example.com'
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// host: 'my::ip::v6',
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// servername: 'example.com'
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// }
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tlsOptions: {},
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//
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// LDAP searching bind DN
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// This bind DN is used to query the server for the DN of the user.
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// This is supposed to be a system user that has access in read only to
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// the DNs of the people that are allowed to log in.
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// LDAP base dn, alternative to searchDN
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//
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// @type string
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//
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rootDN: "cn=thelounge,ou=system-users,dc=example,dc=com",
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//
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// Password of the lounge LDAP system user
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//
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// @type string
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//
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rootPassword: "1234",
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// baseDN: "ou=accounts,dc=example,dc=com",
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//
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// LDAP primary key
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@ -436,27 +433,55 @@ module.exports = {
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primaryKey: "uid",
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//
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// LDAP filter
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// LDAP search dn settings. This defines the procedure by which the
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// lounge first look for user DN before authenticating her.
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// Ignored if baseDN is specified
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//
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// @type string
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// @default "uid"
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// @type object
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//
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filter: "(objectClass=inetOrgPerson)(memberOf=ou=accounts,dc=example,dc=com)",
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searchDN: {
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//
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// LDAP search base (search only within this node)
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//
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// @type string
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//
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base: "dc=example,dc=com",
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//
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// LDAP searching bind DN
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// This bind DN is used to query the server for the DN of the user.
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// This is supposed to be a system user that has access in read only to
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// the DNs of the people that are allowed to log in.
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//
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// @type string
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//
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rootDN: "cn=thelounge,ou=system-users,dc=example,dc=com",
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//
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// LDAP search scope
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//
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// @type string
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// @default "sub"
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//
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scope: "sub"
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//
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// Password of the lounge LDAP system user
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//
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// @type string
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//
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rootPassword: "1234",
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//
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// LDAP filter
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//
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// @type string
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// @default "uid"
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//
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filter: "(objectClass=inetOrgPerson)(memberOf=ou=accounts,dc=example,dc=com)",
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//
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// LDAP search base (search only within this node)
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//
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// @type string
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//
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base: "dc=example,dc=com",
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//
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// LDAP search scope
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//
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// @type string
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// @default "sub"
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//
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scope: "sub"
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}
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},
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// Extra debugging
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29
src/plugins/auth/_ldapCommon.js
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29
src/plugins/auth/_ldapCommon.js
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@ -0,0 +1,29 @@
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"use strict";
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const Helper = require("../../helper");
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const ldap = require("ldapjs");
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function ldapAuthCommon(manager, client, user, bindDN, password, callback) {
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const config = Helper.config;
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let ldapclient = ldap.createClient({
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url: config.ldap.url,
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tlsOptions: config.ldap.tlsOptions
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});
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ldapclient.on("error", function(err) {
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log.error("Unable to connect to LDAP server", err);
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callback(!err);
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});
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ldapclient.bind(bindDN, password, function(err) {
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if (!err && !client) {
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manager.addUser(user, null);
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}
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ldapclient.unbind();
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callback(!err);
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});
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}
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module.exports = ldapAuthCommon;
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72
src/plugins/auth/advancedLdap.js
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72
src/plugins/auth/advancedLdap.js
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@ -0,0 +1,72 @@
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"use strict";
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const Helper = require("../../helper");
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const ldap = require("ldapjs");
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const _ldapAuthCommon = require("./_ldapCommon");
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/**
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* LDAP auth using initial DN search (see config comment for ldap.searchDN)
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*/
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function advancedLdapAuth(manager, client, user, password, callback) {
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if (!user) {
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return callback(false);
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}
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const config = Helper.config;
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const userDN = user.replace(/([,\\/#+<>;"= ])/g, "\\$1");
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let ldapclient = ldap.createClient({
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url: config.ldap.url,
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tlsOptions: config.ldap.tlsOptions
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});
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const base = config.ldap.searchDN.base;
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const searchOptions = {
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scope: config.ldap.searchDN.scope,
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filter: "(&(" + config.ldap.primaryKey + "=" + userDN + ")" + config.ldap.searchDN.filter + ")",
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attributes: ["dn"]
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};
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ldapclient.on("error", function(err) {
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log.error("Unable to connect to LDAP server", err);
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callback(!err);
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});
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ldapclient.bind(config.ldap.searchDN.rootDN, config.ldap.searchDN.rootPassword, function(err) {
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if (err) {
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log.error("Invalid LDAP root credentials");
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ldapclient.unbind();
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callback(false);
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} else {
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ldapclient.search(base, searchOptions, function(err2, res) {
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if (err2) {
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log.warning("User not found: ", userDN);
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ldapclient.unbind();
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callback(false);
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} else {
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let found = false;
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res.on("searchEntry", function(entry) {
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found = true;
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const bindDN = entry.objectName;
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log.info("Auth against LDAP ", config.ldap.url, " with found bindDN ", bindDN);
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ldapclient.unbind();
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_ldapAuthCommon(manager, client, user, bindDN, password, callback);
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});
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res.on("error", function(err3) {
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log.error("LDAP error: ", err3);
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callback(false);
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});
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res.on("end", function() {
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if (!found) {
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callback(false);
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}
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});
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}
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});
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}
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});
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}
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module.exports = advancedLdapAuth;
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src/plugins/auth/ldap.js
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21
src/plugins/auth/ldap.js
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@ -0,0 +1,21 @@
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"use strict";
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const Helper = require("../../helper");
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const _ldapAuthCommon = require("./_ldapCommon");
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function ldapAuth(manager, client, user, password, callback) {
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if (!user) {
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return callback(false);
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}
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const config = Helper.config;
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const userDN = user.replace(/([,\\/#+<>;"= ])/g, "\\$1");
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const bindDN = config.ldap.primaryKey + "=" + userDN + "," + config.ldap.baseDN;
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log.info("Auth against LDAP ", config.ldap.url, " with provided bindDN ", bindDN);
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_ldapAuthCommon(manager, client, user, bindDN, password, callback);
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}
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module.exports = ldapAuth;
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38
src/plugins/auth/local.js
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38
src/plugins/auth/local.js
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@ -0,0 +1,38 @@
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"use strict";
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const Helper = require("../../helper");
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const colors = require("colors/safe");
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function localAuth(manager, client, user, password, callback) {
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// If no user is found, or if the client has not provided a password,
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// fail the authentication straight away
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if (!client || !password) {
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return callback(false);
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}
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// If this user has no password set, fail the authentication
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if (!client.config.password) {
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log.error(`User ${colors.bold(user)} with no local password set tried to sign in. (Probably a LDAP user)`);
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return callback(false);
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}
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Helper.password
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.compare(password, client.config.password)
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.then((matching) => {
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if (matching && Helper.password.requiresUpdate(client.config.password)) {
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const hash = Helper.password.hash(password);
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client.setPassword(hash, (success) => {
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if (success) {
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log.info(`User ${colors.bold(client.name)} logged in and their hashed password has been updated to match new security requirements`);
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}
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});
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}
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callback(matching);
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}).catch((error) => {
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log.error(`Error while checking users password. Error: ${error}`);
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});
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}
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module.exports = localAuth;
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src/server.js
117
src/server.js
@ -11,7 +11,9 @@ var path = require("path");
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var io = require("socket.io");
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var dns = require("dns");
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var Helper = require("./helper");
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var ldap = require("ldapjs");
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var ldapAuth = require("./plugins/auth/ldap");
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var advancedLdapAuth = require("./plugins/auth/advancedLdap");
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var localAuth = require("./plugins/auth/local");
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var colors = require("colors/safe");
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const net = require("net");
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const Identification = require("./identification");
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@ -372,109 +374,6 @@ function initializeClient(socket, client, generateToken, token) {
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}
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}
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function localAuth(client, user, password, callback) {
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// If no user is found, or if the client has not provided a password,
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// fail the authentication straight away
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if (!client || !password) {
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return callback(false);
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}
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// If this user has no password set, fail the authentication
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if (!client.config.password) {
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log.error(`User ${colors.bold(user)} with no local password set tried to sign in. (Probably a LDAP user)`);
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return callback(false);
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}
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Helper.password
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.compare(password, client.config.password)
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.then((matching) => {
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if (matching && Helper.password.requiresUpdate(client.config.password)) {
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const hash = Helper.password.hash(password);
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client.setPassword(hash, (success) => {
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if (success) {
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log.info(`User ${colors.bold(client.name)} logged in and their hashed password has been updated to match new security requirements`);
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}
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});
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}
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callback(matching);
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}).catch((error) => {
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log.error(`Error while checking users password. Error: ${error}`);
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});
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}
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function ldapAuth(client, user, password, callback) {
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if (!user) {
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return callback(false);
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}
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var config = Helper.config;
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var userDN = user.replace(/([,\\/#+<>;"= ])/g, "\\$1");
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var ldapclient = ldap.createClient({
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url: config.ldap.url,
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tlsOptions: config.ldap.tlsOptions
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});
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var base = config.ldap.base;
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var searchOptions = {
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scope: config.ldap.scope,
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filter: "(&(" + config.ldap.primaryKey + "=" + userDN + ")" + config.ldap.filter + ")",
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attributes: ["dn"]
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};
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ldapclient.on("error", function(err) {
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log.error("Unable to connect to LDAP server", err);
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callback(!err);
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});
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ldapclient.bind(config.ldap.rootDN, config.ldap.rootPassword, function(err) {
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if (err) {
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log.error("Invalid LDAP root credentials");
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ldapclient.unbind();
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callback(false);
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} else {
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ldapclient.search(base, searchOptions, function(err2, res) {
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if (err2) {
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log.warning("User not found: ", userDN);
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ldapclient.unbind();
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callback(false);
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} else {
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var found = false;
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res.on("searchEntry", function(entry) {
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found = true;
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var bindDN = entry.objectName;
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log.info("Auth against LDAP ", config.ldap.url, " with bindDN ", bindDN);
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ldapclient.unbind();
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var ldapclient2 = ldap.createClient({
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url: config.ldap.url,
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tlsOptions: config.ldap.tlsOptions
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});
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ldapclient2.bind(bindDN, password, function(err3) {
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if (!err3 && !client) {
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if (!manager.addUser(user, null)) {
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log.error("Unable to create new user", user);
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}
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}
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ldapclient2.unbind();
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callback(!err3);
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});
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});
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res.on("error", function(err3) {
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log.error("LDAP error: ", err3);
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callback(false);
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});
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res.on("end", function() {
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if (!found) {
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callback(false);
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}
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});
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}
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});
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}
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});
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}
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function performAuthentication(data) {
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const socket = this;
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let client;
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@ -538,11 +437,17 @@ function performAuthentication(data) {
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}
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// Perform password checking
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let auth = function() {};
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if (!Helper.config.public && Helper.config.ldap.enable) {
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ldapAuth(client, data.user, data.password, authCallback);
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if ("baseDN" in Helper.config.ldap) {
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auth = ldapAuth;
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} else {
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auth = advancedLdapAuth;
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}
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} else {
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localAuth(client, data.user, data.password, authCallback);
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auth = localAuth;
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}
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auth(manager, client, data.user, data.password, authCallback);
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}
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function reverseDnsLookup(ip, callback) {
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