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/*
* Copyright 2017 - 2022 Anton Tananaev (anton@traccar.org)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.traccar.database;
import javax.naming.Context;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.directory.Attribute;
import javax.naming.directory.InitialDirContext;
import javax.naming.directory.SearchControls;
import javax.naming.directory.SearchResult;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.traccar.config.Config;
import org.traccar.config.Keys;
import org.traccar.model.User;
import java.util.Hashtable;
public class LdapProvider {
private static final Logger LOGGER = LoggerFactory.getLogger(LdapProvider.class);
private final String url;
private final String searchBase;
private final String idAttribute;
private final String nameAttribute;
private final String mailAttribute;
private final String searchFilter;
private final String adminFilter;
private final String serviceUser;
private final String servicePassword;
public LdapProvider(Config config) {
url = config.getString(Keys.LDAP_URL);
searchBase = config.getString(Keys.LDAP_BASE);
idAttribute = config.getString(Keys.LDAP_ID_ATTRIBUTE);
nameAttribute = config.getString(Keys.LDAP_NAME_ATTRIBUTE);
mailAttribute = config.getString(Keys.LDAP_MAIN_ATTRIBUTE);
if (config.hasKey(Keys.LDAP_SEARCH_FILTER)) {
searchFilter = config.getString(Keys.LDAP_SEARCH_FILTER);
} else {
searchFilter = "(" + idAttribute + "=:login)";
}
if (config.hasKey(Keys.LDAP_ADMIN_FILTER)) {
adminFilter = config.getString(Keys.LDAP_ADMIN_FILTER);
} else {
String adminGroup = config.getString(Keys.LDAP_ADMIN_GROUP);
if (adminGroup != null) {
adminFilter = "(&(" + idAttribute + "=:login)(memberOf=" + adminGroup + "))";
} else {
adminFilter = null;
}
}
serviceUser = config.getString(Keys.LDAP_USER);
servicePassword = config.getString(Keys.LDAP_PASSWORD);
}
private InitialDirContext auth(String accountName, String password) throws NamingException {
Hashtable<String, String> env = new Hashtable<>();
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.PROVIDER_URL, url);
env.put(Context.SECURITY_AUTHENTICATION, "simple");
env.put(Context.SECURITY_PRINCIPAL, accountName);
env.put(Context.SECURITY_CREDENTIALS, password);
return new InitialDirContext(env);
}
private boolean isAdmin(String accountName) {
if (this.adminFilter != null) {
try {
InitialDirContext context = initContext();
String searchString = adminFilter.replace(":login", encodeForLdap(accountName));
SearchControls searchControls = new SearchControls();
searchControls.setSearchScope(SearchControls.SUBTREE_SCOPE);
NamingEnumeration<SearchResult> results = context.search(searchBase, searchString, searchControls);
if (results.hasMoreElements()) {
results.nextElement();
if (results.hasMoreElements()) {
LOGGER.warn("Matched multiple users for the accountName: " + accountName);
return false;
}
return true;
}
} catch (NamingException e) {
return false;
}
}
return false;
}
public InitialDirContext initContext() throws NamingException {
return auth(serviceUser, servicePassword);
}
private SearchResult lookupUser(String accountName) throws NamingException {
InitialDirContext context = initContext();
String searchString = searchFilter.replace(":login", encodeForLdap(accountName));
SearchControls searchControls = new SearchControls();
String[] attributeFilter = {idAttribute, nameAttribute, mailAttribute};
searchControls.setReturningAttributes(attributeFilter);
searchControls.setSearchScope(SearchControls.SUBTREE_SCOPE);
NamingEnumeration<SearchResult> results = context.search(searchBase, searchString, searchControls);
SearchResult searchResult = null;
if (results.hasMoreElements()) {
searchResult = results.nextElement();
if (results.hasMoreElements()) {
LOGGER.warn("Matched multiple users for the accountName: " + accountName);
return null;
}
}
return searchResult;
}
public User getUser(String accountName) {
SearchResult ldapUser;
User user = new User();
try {
ldapUser = lookupUser(accountName);
if (ldapUser != null) {
Attribute attribute = ldapUser.getAttributes().get(idAttribute);
if (attribute != null) {
user.setLogin((String) attribute.get());
} else {
user.setLogin(accountName);
}
attribute = ldapUser.getAttributes().get(nameAttribute);
if (attribute != null) {
user.setName((String) attribute.get());
} else {
user.setName(accountName);
}
attribute = ldapUser.getAttributes().get(mailAttribute);
if (attribute != null) {
user.setEmail((String) attribute.get());
} else {
user.setEmail(accountName);
}
}
user.setAdministrator(isAdmin(accountName));
} catch (NamingException e) {
user.setLogin(accountName);
user.setName(accountName);
user.setEmail(accountName);
LOGGER.warn("User lookup error", e);
}
return user;
}
public boolean login(String username, String password) {
try {
SearchResult ldapUser = lookupUser(username);
if (ldapUser != null) {
auth(ldapUser.getNameInNamespace(), password).close();
return true;
}
} catch (NamingException e) {
return false;
}
return false;
}
public String encodeForLdap(String input) {
if (input == null) {
return null;
}
StringBuilder sb = new StringBuilder();
for (int i = 0; i < input.length(); i++) {
char c = input.charAt(i);
switch (c) {
case '\\':
sb.append("\\5c");
break;
case '*':
sb.append("\\2a");
break;
case '(':
sb.append("\\28");
break;
case ')':
sb.append("\\29");
break;
case '\0':
sb.append("\\00");
break;
default:
sb.append(c);
}
}
return sb.toString();
}
}
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