/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.isis.security.ldap.authentication;
import java.util.ArrayList;
import java.util.Hashtable;
import java.util.List;
import javax.naming.AuthenticationException;
import javax.naming.Context;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.directory.DirContext;
import javax.naming.directory.InitialDirContext;
import javax.naming.directory.SearchControls;
import javax.naming.directory.SearchResult;
import org.apache.log4j.Logger;
import org.apache.isis.core.commons.config.IsisConfiguration;
import org.apache.isis.core.commons.ensure.Assert;
import org.apache.isis.core.commons.exceptions.IsisException;
import org.apache.isis.core.runtime.authentication.AuthenticationRequest;
import org.apache.isis.core.runtime.authentication.AuthenticationRequestPassword;
import org.apache.isis.core.runtime.authentication.standard.AuthenticatorAbstract;
public class LdapAuthenticator extends AuthenticatorAbstract {
private static final Logger LOG = Logger.getLogger(LdapAuthenticator.class);
private final String ldapProvider;
private final String ldapDn;
public LdapAuthenticator(final IsisConfiguration configuration) {
super(configuration);
ldapProvider = getConfiguration().getString(LdapAuthenticationConstants.SERVER_KEY);
ldapDn = getConfiguration().getString(LdapAuthenticationConstants.LDAPDN_KEY);
}
@Override
public final boolean canAuthenticate(final Class<? extends AuthenticationRequest> authenticationRequestClass) {
return AuthenticationRequestPassword.class.isAssignableFrom(authenticationRequestClass);
}
private void setRoles(final DirContext authContext, final AuthenticationRequest request, final String username) throws NamingException {
final List<String> roles = new ArrayList<String>();
final SearchControls controls = new SearchControls();
controls.setSearchScope(SearchControls.SUBTREE_SCOPE);
controls.setReturningAttributes(new String[] { "cn" });
final String name = "uid=" + username + ", " + ldapDn;
final NamingEnumeration<SearchResult> answer = authContext.search(name, LdapAuthenticationConstants.FILTER, controls);
while (answer.hasMore()) {
final SearchResult result = answer.nextElement();
final String roleName = (String) result.getAttributes().get("cn").get(0);
roles.add(roleName);
LOG.debug("Adding role: " + roleName);
}
request.setRoles(roles);
}
@Override
public boolean isValid(final AuthenticationRequest request) {
final AuthenticationRequestPassword passwordRequest = (AuthenticationRequestPassword) request;
final String username = passwordRequest.getName();
Assert.assertNotNull(username);
if (username.equals("")) {
LOG.debug("empty username");
return false; // failed authentication
}
final String password = passwordRequest.getPassword();
Assert.assertNotNull(password);
final Hashtable<String, String> env = new Hashtable<String, String>(4);
env.put(Context.INITIAL_CONTEXT_FACTORY, LdapAuthenticationConstants.SERVER_DEFAULT);
env.put(Context.PROVIDER_URL, ldapProvider);
env.put(Context.SECURITY_PRINCIPAL, "uid=" + username + ", " + ldapDn);
env.put(Context.SECURITY_CREDENTIALS, password);
DirContext authContext = null;
try {
authContext = new InitialDirContext(env);
setRoles(authContext, request, username);
return true;
} catch (final AuthenticationException e) {
return false;
} catch (final NamingException e) {
throw new IsisException("Failed to authenticate using LDAP", e);
} finally {
try {
if (authContext != null) {
authContext.close();
}
} catch (final NamingException e) {
throw new IsisException("Failed to authenticate using LDAP", e);
}
}
}
}