| /* |
| * 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.internals; |
| |
| import java.util.List; |
| import java.util.Map; |
| |
| import javax.security.auth.callback.Callback; |
| import javax.security.auth.callback.NameCallback; |
| import javax.security.auth.callback.UnsupportedCallbackException; |
| import javax.security.auth.login.AppConfigurationEntry; |
| |
| import org.apache.kafka.common.security.auth.AuthenticateCallbackHandler; |
| import org.apache.kafka.common.security.authenticator.CredentialCache; |
| import org.apache.kafka.common.security.scram.ScramCredential; |
| import org.apache.kafka.common.security.scram.ScramCredentialCallback; |
| import org.apache.kafka.common.security.token.delegation.TokenInformation; |
| import org.apache.kafka.common.security.token.delegation.internals.DelegationTokenCache; |
| import org.apache.kafka.common.security.token.delegation.internals.DelegationTokenCredentialCallback; |
| |
| public class ScramServerCallbackHandler implements AuthenticateCallbackHandler { |
| |
| private final CredentialCache.Cache<ScramCredential> credentialCache; |
| private final DelegationTokenCache tokenCache; |
| private String saslMechanism; |
| |
| public ScramServerCallbackHandler(CredentialCache.Cache<ScramCredential> credentialCache, |
| DelegationTokenCache tokenCache) { |
| this.credentialCache = credentialCache; |
| this.tokenCache = tokenCache; |
| } |
| |
| @Override |
| public void configure(Map<String, ?> configs, String mechanism, List<AppConfigurationEntry> jaasConfigEntries) { |
| this.saslMechanism = mechanism; |
| } |
| |
| @Override |
| public void handle(Callback[] callbacks) throws UnsupportedCallbackException { |
| String username = null; |
| for (Callback callback : callbacks) { |
| if (callback instanceof NameCallback) |
| username = ((NameCallback) callback).getDefaultName(); |
| else if (callback instanceof DelegationTokenCredentialCallback) { |
| DelegationTokenCredentialCallback tokenCallback = (DelegationTokenCredentialCallback) callback; |
| tokenCallback.scramCredential(tokenCache.credential(saslMechanism, username)); |
| tokenCallback.tokenOwner(tokenCache.owner(username)); |
| TokenInformation tokenInfo = tokenCache.token(username); |
| if (tokenInfo != null) |
| tokenCallback.tokenExpiryTimestamp(tokenInfo.expiryTimestamp()); |
| } else if (callback instanceof ScramCredentialCallback) { |
| ScramCredentialCallback sc = (ScramCredentialCallback) callback; |
| sc.scramCredential(credentialCache.get(username)); |
| } else |
| throw new UnsupportedCallbackException(callback); |
| } |
| } |
| |
| @Override |
| public void close() { |
| } |
| } |