kafka KerberosClientCallbackHandler 源码
kafka KerberosClientCallbackHandler 代码
文件路径:/clients/src/main/java/org/apache/kafka/common/security/kerberos/KerberosClientCallbackHandler.java
/*
* 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.kafka.common.security.kerberos;
import org.apache.kafka.common.config.SaslConfigs;
import org.apache.kafka.common.security.auth.AuthenticateCallbackHandler;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.NameCallback;
import javax.security.auth.callback.PasswordCallback;
import javax.security.auth.callback.UnsupportedCallbackException;
import javax.security.auth.login.AppConfigurationEntry;
import javax.security.sasl.AuthorizeCallback;
import javax.security.sasl.RealmCallback;
import java.util.List;
import java.util.Map;
/**
* Callback handler for SASL/GSSAPI clients.
*/
public class KerberosClientCallbackHandler implements AuthenticateCallbackHandler {
@Override
public void configure(Map<String, ?> configs, String saslMechanism, List<AppConfigurationEntry> jaasConfigEntries) {
if (!saslMechanism.equals(SaslConfigs.GSSAPI_MECHANISM))
throw new IllegalStateException("Kerberos callback handler should only be used with GSSAPI");
}
@Override
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) {
String errorMessage = "Could not login: the client is being asked for a password, but the Kafka" +
" client code does not currently support obtaining a password from the user.";
errorMessage += " Make sure -Djava.security.auth.login.config property passed to JVM and" +
" the client is configured to use a ticket cache (using" +
" the JAAS configuration setting 'useTicketCache=true)'. Make sure you are using" +
" FQDN of the Kafka broker you are trying to connect to.";
throw new UnsupportedCallbackException(callback, errorMessage);
} 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();
ac.setAuthorized(authId.equals(authzId));
if (ac.isAuthorized())
ac.setAuthorizedID(authzId);
} else {
throw new UnsupportedCallbackException(callback, "Unrecognized SASL ClientCallback");
}
}
}
@Override
public void close() {
}
}
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