| /* |
| * 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.zookeeper; |
| |
| import javax.security.auth.callback.Callback; |
| import javax.security.auth.callback.CallbackHandler; |
| import javax.security.auth.callback.NameCallback; |
| import javax.security.auth.callback.PasswordCallback; |
| import javax.security.auth.callback.UnsupportedCallbackException; |
| import javax.security.sasl.AuthorizeCallback; |
| import javax.security.sasl.RealmCallback; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * This is used by the SASL mechanisms to get further information to complete |
| * the authentication. For example, a SASL mechanism might use this callback |
| * handler to do verification operation. The CallbackHandler interface here |
| * refers to javax.security.auth.callback.CallbackHandler. It should not be |
| * confused with ZooKeeper packet callbacks like |
| * org.apache.zookeeper.server.auth.SaslServerCallbackHandler. |
| */ |
| public class SaslClientCallbackHandler implements CallbackHandler { |
| |
| private String password = null; |
| private static final Logger LOG = LoggerFactory.getLogger(SaslClientCallbackHandler.class); |
| private final String entity; |
| public SaslClientCallbackHandler(String password, String client) { |
| this.password = password; |
| this.entity = client; |
| } |
| |
| public void handle(Callback[] callbacks) throws UnsupportedCallbackException { |
| for (Callback callback : callbacks) { |
| if (callback instanceof NameCallback) { |
| NameCallback nc = (NameCallback) callback; |
| nc.setName(nc.getDefaultName()); |
| } else { |
| if (callback instanceof PasswordCallback) { |
| PasswordCallback pc = (PasswordCallback) callback; |
| if (password != null) { |
| pc.setPassword(this.password.toCharArray()); |
| } else { |
| LOG.warn( |
| "Could not login: the {} is being asked for a password, but the ZooKeeper {}" |
| + " code does not currently support obtaining a password from the user." |
| + " Make sure that the {} is configured to use a ticket cache (using" |
| + " the JAAS configuration setting 'useTicketCache=true)' and restart the {}. If" |
| + " you still get this message after that, the TGT in the ticket cache has expired and must" |
| + " be manually refreshed. To do so, first determine if you are using a password or a" |
| + " keytab. If the former, run kinit in a Unix shell in the environment of the user who" |
| + " is running this Zookeeper {} using the command" |
| + " 'kinit <princ>' (where <princ> is the name of the {}'s Kerberos principal)." |
| + " If the latter, do" |
| + " 'kinit -k -t <keytab> <princ>' (where <princ> is the name of the Kerberos principal, and" |
| + " <keytab> is the location of the keytab file). After manually refreshing your cache," |
| + " restart this {}. If you continue to see this message after manually refreshing" |
| + " your cache, ensure that your KDC host's clock is in sync with this host's clock.", |
| entity, |
| entity, |
| entity, |
| entity, |
| entity, |
| entity, |
| entity); |
| } |
| } else { |
| if (callback instanceof RealmCallback) { |
| RealmCallback rc = (RealmCallback) callback; |
| rc.setText(rc.getDefaultText()); |
| } else { |
| if (callback instanceof AuthorizeCallback) { |
| AuthorizeCallback ac = (AuthorizeCallback) callback; |
| String authid = ac.getAuthenticationID(); |
| String authzid = ac.getAuthorizationID(); |
| if (authid.equals(authzid)) { |
| ac.setAuthorized(true); |
| } else { |
| ac.setAuthorized(false); |
| } |
| if (ac.isAuthorized()) { |
| ac.setAuthorizedID(authzid); |
| } |
| } else { |
| throw new UnsupportedCallbackException( |
| callback, |
| "Unrecognized SASL " + entity + "Callback"); |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| } |