150 lines
3.6 KiB
JavaScript
150 lines
3.6 KiB
JavaScript
"use strict";
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const log = require("../../log");
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const Helper = require("../../helper");
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// Forked ldapjs for 2 reasons:
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// 1. Removed bunyan https://github.com/joyent/node-ldapjs/pull/399
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// 2. Remove dtrace-provider dependency
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const ldap = require("thelounge-ldapjs-non-maintained-fork");
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function ldapAuthCommon(user, bindDN, password, callback) {
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const config = Helper.config;
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const 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(false);
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});
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ldapclient.bind(bindDN, password, function(err) {
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ldapclient.unbind();
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if (err) {
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log.error(`LDAP bind failed: ${err}`);
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callback(false);
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} else {
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callback(true);
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}
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});
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}
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function simpleLdapAuth(user, password, callback) {
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if (!user || !password) {
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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(user, bindDN, password, callback);
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}
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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(user, password, callback) {
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if (!user || !password) {
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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 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(false);
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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.warn(`LDAP 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(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(result) {
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ldapclient.unbind();
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if (!found) {
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log.warn(`LDAP Search did not find anything for: ${userDN} (${result.status})`);
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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 ldapAuth(manager, client, user, password, callback) {
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// TODO: Enable the use of starttls() as an alternative to ldaps
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// TODO: move this out of here and get rid of `manager` and `client` in
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// auth plugin API
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function callbackWrapper(valid) {
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if (valid && !client) {
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manager.addUser(user, null, true);
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}
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callback(valid);
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}
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let auth;
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if ("baseDN" in Helper.config.ldap) {
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auth = simpleLdapAuth;
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} else {
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auth = advancedLdapAuth;
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}
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return auth(user, password, callbackWrapper);
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}
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function isLdapEnabled() {
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return !Helper.config.public && Helper.config.ldap.enable;
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}
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module.exports = {
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auth: ldapAuth,
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isEnabled: isLdapEnabled,
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};
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