/*
* 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.scram;
import java.io.IOException;
import java.util.Map;
import javax.security.auth.Subject;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.NameCallback;
import javax.security.auth.callback.UnsupportedCallbackException;
import org.apache.kafka.common.network.Mode;
import org.apache.kafka.common.security.auth.AuthCallbackHandler;
import org.apache.kafka.common.security.authenticator.CredentialCache;
public class ScramServerCallbackHandler implements AuthCallbackHandler {
private final CredentialCache.Cache<ScramCredential> credentialCache;
public ScramServerCallbackHandler(CredentialCache.Cache<ScramCredential> credentialCache) {
this.credentialCache = credentialCache;
}
@Override
public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
String username = null;
for (Callback callback : callbacks) {
if (callback instanceof NameCallback)
username = ((NameCallback) callback).getDefaultName();
else if (callback instanceof ScramCredentialCallback)
((ScramCredentialCallback) callback).scramCredential(credentialCache.get(username));
else
throw new UnsupportedCallbackException(callback);
}
}
@Override
public void configure(Map<String, ?> configs, Mode mode, Subject subject, String saslMechanism) {
}
@Override
public void close() {
}
}