| /* |
| * 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.drill.exec.rpc.security; |
| |
| import org.apache.drill.common.AutoCloseables; |
| import org.apache.drill.common.map.CaseInsensitiveMap; |
| import org.apache.drill.exec.rpc.security.kerberos.KerberosFactory; |
| import org.apache.drill.exec.rpc.security.plain.PlainFactory; |
| |
| import javax.security.sasl.SaslException; |
| import java.util.Map; |
| import java.util.Set; |
| |
| public class ClientAuthenticatorProvider implements AuthenticatorProvider { |
| private static final org.slf4j.Logger logger = |
| org.slf4j.LoggerFactory.getLogger(ClientAuthenticatorProvider.class); |
| |
| private static final String customFactories = System.getProperty("drill.customAuthFactories"); |
| |
| private static final class Holder { |
| static final ClientAuthenticatorProvider INSTANCE = new ClientAuthenticatorProvider(); |
| |
| // prevent instantiation |
| private Holder() { |
| } |
| } |
| |
| public static ClientAuthenticatorProvider getInstance() { |
| return Holder.INSTANCE; |
| } |
| |
| // Mapping: simple name -> authenticator factory |
| private final Map<String, AuthenticatorFactory> authFactories = CaseInsensitiveMap.newHashMapWithExpectedSize(5); |
| |
| private ClientAuthenticatorProvider() { |
| // factories provided by Drill |
| final KerberosFactory kerberosFactory = new KerberosFactory(); |
| authFactories.put(kerberosFactory.getSimpleName(), kerberosFactory); |
| final PlainFactory plainFactory = new PlainFactory(); |
| authFactories.put(plainFactory.getSimpleName(), plainFactory); |
| |
| // then, custom factories |
| if (customFactories != null) { |
| final String[] factories = customFactories.split(","); |
| for (final String factory : factories) { |
| try { |
| final Class<?> clazz = Class.forName(factory); |
| if (AuthenticatorFactory.class.isAssignableFrom(clazz)) { |
| final AuthenticatorFactory instance = (AuthenticatorFactory) clazz.newInstance(); |
| authFactories.put(instance.getSimpleName(), instance); |
| } |
| } catch (final ReflectiveOperationException e) { |
| logger.error("Failed to create auth factory {}", factory, e); |
| } |
| } |
| } |
| |
| if (logger.isDebugEnabled()) { |
| logger.debug("Configured mechanisms: {}", authFactories.keySet()); |
| } |
| } |
| |
| @Override |
| public AuthenticatorFactory getAuthenticatorFactory(final String name) throws SaslException { |
| final AuthenticatorFactory mechanism = authFactories.get(name); |
| if (mechanism == null) { |
| throw new SaslException(String.format("Unknown mechanism: '%s' Configured mechanisms: %s", |
| name, authFactories.keySet())); |
| } |
| return mechanism; |
| } |
| |
| @Override |
| public Set<String> getAllFactoryNames() { |
| return authFactories.keySet(); |
| } |
| |
| @Override |
| public boolean containsFactory(final String name) { |
| return authFactories.containsKey(name); |
| } |
| |
| @Override |
| public void close() throws Exception { |
| AutoCloseables.close(authFactories.values()); |
| authFactories.clear(); |
| } |
| } |