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ep_ldapauth.js
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ep_ldapauth.js
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// Copyright 2013 Andrew Grimberg <tykeal@bardicgrove.org>
//
// @License GPL-2.0 <http://spdx.org/licenses/GPL-2.0>
//var LdapAuth = require('ldapauth');
var MyLdapAuth = require('./lib/MyLdapAuth.js');
var util = require('util');
var ERR = require('async-stacktrace');
var settings = require('ep_etherpad-lite/node/utils/Settings');
var authorManager = require('ep_etherpad-lite/node/db/AuthorManager');
function ldapauthSetUsername(token, username) {
console.debug('ep_ldapauth.ldapauthSetUsername: getting authorid for token %s', token);
authorManager.getAuthor4Token(token, function(err, author) {
if (ERR(err)) {
console.debug('ep_ldapauth.ldapauthSetUsername: could not get authorid for token %s', token);
} else {
console.debug('ep_ldapauth.ldapauthSetUsername: have authorid %s, setting username to "%s"', author, username);
authorManager.setAuthorName(author, username);
}
});
return;
}
exports.authenticate = function(hook_name, context, cb) {
console.debug('ep_ldapauth.authenticate');
// If auth headers are present use them to authenticate
if (context.req.headers.authorization && context.req.headers.authorization.search('Basic ') === 0) {
var userpass = new Buffer(context.req.headers.authorization.split(' ')[1], 'base64').toString().split(":");
var username = userpass.shift();
var password = userpass.join(':');
var express_sid = context.req.sessionID;
var authenticateLDAP = new MyLdapAuth({
url: settings.users.ldapauth.url,
adminDn: settings.users.ldapauth.searchDN,
adminPassword: settings.users.ldapauth.searchPWD,
searchBase: settings.users.ldapauth.accountBase,
searchFilter: settings.users.ldapauth.accountPattern,
cache: true
});
// Attempt to authenticate the user
authenticateLDAP.authenticate(username, password, function(err, user) {
if (err) {
console.error('ep_ldapauth.authenticate: LDAP auth error: %s', err);
authenticateLDAP.close(function (err) {
if (err) {
console.error('ep_ldapauth.authenticate: LDAP close error: %s', err);
}
});
authenticateLDAP = null;
return cb([false]);
}
// User authenticated, save off some information needed for authorization
context.req.session.user = { username: username };
if ('displayNameAttribute' in settings.users.ldapauth && settings.users.ldapauth.displayNameAttribute in user) {
context.req.session.user['displayName']=user[settings.users.ldapauth.displayNameAttribute];
}
else if ('cn' in user) {
context.req.session.user['displayName']=user.cn;
}
if (settings.users.ldapauth.groupAttributeIsDN) {
context.req.session.user.userDN = user.dn;
}
settings.globalUserName = username;
console.debug('ep_ldapauth.authenticate: deferring setting of username [%s] to CLIENT_READY for express_sid = %s', username, express_sid);
authenticateLDAP.close(function (err) {
if (err) {
console.error('ep_ldapauth.authenticate: LDAP close error: %s', err);
}
});
authenticateLDAP = null;
console.debug('ep_ldapauth.authenticate: successful authentication');
return cb([true]);
});
} else {
console.debug('ep_ldapauth.authenticate: failed authentication no auth headers');
return cb([false]);
}
};
exports.authorize = function(hook_name, context, cb) {
console.debug('ep_ldapauth.authorize');
if(settings.users.ldapauth.anonymousReadonly &&
/^\/(p\/r\..{16}|locales.json|static|javascripts|pluginfw|favicon.ico)/.test(context.resource)) {
console.debug('ep_ldapauth.authorize.anonymous: authorizing static path %s', context.resource);
return cb([true]);
}
userDN = null;
if (typeof(context.req.session.user) !== 'undefined' &&
typeof(context.req.session.user.username) !== 'undefined') {
username = context.req.session.user.username;
if (typeof(context.req.session.user.userDN !== 'undefined')) {
userDN = context.req.session.user.userDN;
}
} else {
console.debug('ep_ldapauth.authorize: no username in user object');
return cb([false]);
}
if (/^\/(static|javascripts|pluginfw|favicon.ico|api)/.test(context.resource)) {
console.debug('ep_ldapauth.authorize: authorizing static path %s', context.resource);
return cb([true]);
} else if (context.resource.match(/^\/admin/)) {
console.debug('ep_ldapauth.authorize: attempting to authorize along administrative path %s', context.resource);
var authorizeLDAP = new MyLdapAuth({
url: settings.users.ldapauth.url,
adminDn: settings.users.ldapauth.searchDN,
adminPassword: settings.users.ldapauth.searchPWD,
searchBase: settings.users.ldapauth.accountBase,
searchFilter: settings.users.ldapauth.accountPattern,
groupSearchBase: settings.users.ldapauth.groupSearchBase,
groupAttribute: settings.users.ldapauth.groupAttribute,
groupAttributeIsDN: settings.users.ldapauth.groupAttributeIsDN,
searchScope: settings.users.ldapauth.searchScope,
groupSearch: settings.users.ldapauth.groupSearch,
cache: true
});
authorizeLDAP.groupsearch(username, userDN, function(err, groups) {
if (err) {
console.error('ep_ldapauth.authorize: LDAP groupsearch error: %s', err);
authorizeLDAP.close(function (err) {
if (err) {
console.error('ep_ldapauth.authorize: LDAP close error: %s', err);
}
});
authorizeLDAP = null;
return cb([false]);
}
// We've recieved back group(s) that the user matches
// Given our current auth scheme (only checking on admin) we'll auth
if (groups) {
context.req.session.user.is_admin = true;
authorizeLDAP.close(function (err) {
if (err) {
console.error('ep_ldapauth.authorize: LDAP close error: %s', err);
}
});
authorizeLDAP = null;
console.debug('ep_ldapauth.authorize: successful authorization');
return cb([true]);
} else {
context.req.session.user.is_admin = false;
authorizeLDAP.close(function (err) {
if (err) {
console.error('ep_ldapauth.authorize: LDAP close error: %s', err);
}
});
authorizeLDAP = null;
console.debug('ep_ldapauth.authorize: failed authorization');
return cb([false]);
}
});
} else {
console.debug('ep_ldapauth.authorize: passing authorize along for path %s', context.resource);
return cb([false]);
}
};
exports.handleMessage = function(hook_name, context, cb) {
console.debug("ep_ldapauth.handleMessage");
if ( context.message.type == "CLIENT_READY" ) {
if (!context.message.token) {
console.debug('ep_ldapauth.handleMessage: intercepted CLIENT_READY message has no token!');
} else {
var client_id = context.client.id;
if ('user' in context.client.manager.handshaken[client_id].session) {
var displayName = context.client.manager.handshaken[client_id].session.user.displayName;
if(settings.users.ldapauth.anonymousReadonly && !displayName) displayName = 'guest';
console.debug('ep_ldapauth.handleMessage: intercepted CLIENT_READY message for client_id = %s, setting username for token %s to %s', client_id, context.message.token, displayName);
ldapauthSetUsername(context.message.token, displayName);
}
else {
console.debug('ep_ldapauth.handleMessage: intercepted CLIENT_READY but user does have displayName !');
}
}
} else if ( context.message.type == "COLLABROOM" && context.message.data.type == "USERINFO_UPDATE" ) {
console.debug('ep_ldapauth.handleMessage: intercepted USERINFO_UPDATE and dropping it!');
return cb([null]);
}
return cb([context.message]);
};
// vim: sw=2 ts=2 sts=2 et ai