| /** |
| * 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.storm.messaging.netty; |
| |
| import java.io.IOException; |
| import java.security.Principal; |
| import java.security.PrivilegedActionException; |
| import java.security.PrivilegedExceptionAction; |
| import java.util.Map; |
| import java.util.TreeMap; |
| import javax.security.auth.Subject; |
| import javax.security.auth.callback.Callback; |
| import javax.security.auth.callback.CallbackHandler; |
| import javax.security.auth.callback.UnsupportedCallbackException; |
| import javax.security.auth.kerberos.KerberosTicket; |
| import javax.security.auth.login.Configuration; |
| import javax.security.auth.login.LoginException; |
| import javax.security.sasl.Sasl; |
| import javax.security.sasl.SaslClient; |
| import javax.security.sasl.SaslException; |
| import org.apache.storm.security.auth.ClientAuthUtils; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Implements SASL logic for storm worker client processes. |
| */ |
| public class KerberosSaslNettyClient { |
| |
| private static final Logger LOG = LoggerFactory |
| .getLogger(KerberosSaslNettyClient.class); |
| |
| /** |
| * Used to respond to server's counterpart, SaslServer with SASL tokens represented as byte arrays. |
| */ |
| private SaslClient saslClient; |
| private Subject subject; |
| private String jaasSection; |
| |
| /** |
| * Create a KerberosSaslNettyClient for authentication with servers. |
| */ |
| public KerberosSaslNettyClient(Map<String, Object> topoConf, String jaasSection, String host) { |
| LOG.debug("KerberosSaslNettyClient: Creating SASL {} client to authenticate to server ", |
| SaslUtils.KERBEROS); |
| |
| LOG.info("Creating Kerberos Client."); |
| |
| Configuration loginConf; |
| try { |
| loginConf = ClientAuthUtils.getConfiguration(topoConf); |
| } catch (Throwable t) { |
| LOG.error("Failed to get loginConf: ", t); |
| throw t; |
| } |
| LOG.debug("KerberosSaslNettyClient: authmethod {}", SaslUtils.KERBEROS); |
| |
| SaslClientCallbackHandler ch = new SaslClientCallbackHandler(); |
| |
| subject = null; |
| try { |
| LOG.debug("Setting Configuration to login_config: {}", loginConf); |
| //specify a configuration object to be used |
| Configuration.setConfiguration(loginConf); |
| //now login |
| LOG.debug("Trying to login."); |
| Login login = new Login(jaasSection, ch); |
| subject = login.getSubject(); |
| LOG.debug("Got Subject: {}", subject.toString()); |
| } catch (LoginException ex) { |
| LOG.error("Client failed to login in principal:" + ex, ex); |
| throw new RuntimeException(ex); |
| } |
| |
| //check the credential of our principal |
| if (subject.getPrivateCredentials(KerberosTicket.class).isEmpty()) { |
| LOG.error("Failed to verify user principal."); |
| throw new RuntimeException("Fail to verify user principal with section \"" |
| + jaasSection |
| + "\" in login configuration file " |
| + loginConf); |
| } |
| |
| String serviceName = null; |
| try { |
| serviceName = ClientAuthUtils.get(loginConf, jaasSection, "serviceName"); |
| } catch (IOException e) { |
| LOG.error("Failed to get service name.", e); |
| throw new RuntimeException(e); |
| } |
| |
| try { |
| Principal principal = (Principal) subject.getPrincipals().toArray()[0]; |
| final String fPrincipalName = principal.getName(); |
| final String fHost = host; |
| final String fServiceName = serviceName; |
| final CallbackHandler fch = ch; |
| LOG.debug("Kerberos Client with principal: {}, host: {}", fPrincipalName, fHost); |
| saslClient = Subject.doAs(subject, new PrivilegedExceptionAction<SaslClient>() { |
| @Override |
| public SaslClient run() { |
| try { |
| Map<String, String> props = new TreeMap<String, String>(); |
| props.put(Sasl.QOP, "auth"); |
| props.put(Sasl.SERVER_AUTH, "false"); |
| return Sasl.createSaslClient( |
| new String[]{ SaslUtils.KERBEROS }, |
| fPrincipalName, |
| fServiceName, |
| fHost, |
| props, fch); |
| } catch (Exception e) { |
| LOG.error("Subject failed to create sasl client.", e); |
| return null; |
| } |
| } |
| }); |
| LOG.info("Got Client: {}", saslClient); |
| |
| } catch (PrivilegedActionException e) { |
| LOG.error("KerberosSaslNettyClient: Could not create Sasl Netty Client."); |
| throw new RuntimeException(e); |
| } |
| } |
| |
| public boolean isComplete() { |
| return saslClient.isComplete(); |
| } |
| |
| /** |
| * Respond to server's SASL token. |
| * |
| * @param saslTokenMessage contains server's SASL token |
| * @return client's response SASL token |
| */ |
| public byte[] saslResponse(SaslMessageToken saslTokenMessage) { |
| try { |
| final SaslMessageToken fSaslTokenMessage = saslTokenMessage; |
| byte[] retval = Subject.doAs(subject, new PrivilegedExceptionAction<byte[]>() { |
| @Override |
| public byte[] run() { |
| try { |
| byte[] retval = saslClient.evaluateChallenge(fSaslTokenMessage |
| .getSaslToken()); |
| return retval; |
| } catch (SaslException e) { |
| LOG.error("saslResponse: Failed to respond to SASL server's token:", |
| e); |
| throw new RuntimeException(e); |
| } |
| } |
| }); |
| return retval; |
| } catch (PrivilegedActionException e) { |
| LOG.error("Failed to generate response for token: ", e); |
| throw new RuntimeException(e); |
| } |
| } |
| |
| /** |
| * Implementation of javax.security.auth.callback.CallbackHandler that works with Storm topology tokens. |
| */ |
| private static class SaslClientCallbackHandler implements CallbackHandler { |
| |
| /** |
| * Implementation used to respond to SASL tokens from server. |
| * |
| * @param callbacks objects that indicate what credential information the server's SaslServer requires from the client. |
| */ |
| @Override |
| public void handle(Callback[] callbacks) throws UnsupportedCallbackException { |
| for (Callback callback : callbacks) { |
| LOG.info("Kerberos Client Callback Handler got callback: {}", callback.getClass()); |
| } |
| } |
| } |
| |
| } |