| /* |
| * 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.oauthbearer.internals; |
| |
| import java.util.Map; |
| import java.util.Set; |
| |
| import javax.security.auth.Subject; |
| import javax.security.auth.login.Configuration; |
| import javax.security.auth.login.LoginContext; |
| import javax.security.auth.login.LoginException; |
| |
| import org.apache.kafka.common.config.SaslConfigs; |
| import org.apache.kafka.common.security.auth.AuthenticateCallbackHandler; |
| import org.apache.kafka.common.security.auth.Login; |
| import org.apache.kafka.common.security.oauthbearer.OAuthBearerLoginModule; |
| import org.apache.kafka.common.security.oauthbearer.OAuthBearerToken; |
| import org.apache.kafka.common.security.oauthbearer.internals.expiring.ExpiringCredential; |
| import org.apache.kafka.common.security.oauthbearer.internals.expiring.ExpiringCredentialRefreshConfig; |
| import org.apache.kafka.common.security.oauthbearer.internals.expiring.ExpiringCredentialRefreshingLogin; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * This class is responsible for refreshing logins for both Kafka client and |
| * server when the credential is an OAuth 2 bearer token communicated over |
| * SASL/OAUTHBEARER. An OAuth 2 bearer token has a limited lifetime, and an |
| * instance of this class periodically refreshes it so that the client can |
| * create new connections to brokers on an ongoing basis. |
| * <p> |
| * This class does not need to be explicitly set via the |
| * {@code sasl.login.class} client configuration property or the |
| * {@code listener.name.sasl_[plaintext|ssl].oauthbearer.sasl.login.class} |
| * broker configuration property when the SASL mechanism is OAUTHBEARER; it is |
| * automatically set by default in that case. |
| * <p> |
| * The parameters that impact how the refresh algorithm operates are specified |
| * as part of the producer/consumer/broker configuration and are as follows. See |
| * the documentation for these properties elsewhere for details. |
| * <table> |
| * <tr> |
| * <th>Producer/Consumer/Broker Configuration Property</th> |
| * </tr> |
| * <tr> |
| * <td>{@code sasl.login.refresh.window.factor}</td> |
| * </tr> |
| * <tr> |
| * <td>{@code sasl.login.refresh.window.jitter}</td> |
| * </tr> |
| * <tr> |
| * <td>{@code sasl.login.refresh.min.period.seconds}</td> |
| * </tr> |
| * <tr> |
| * <td>{@code sasl.login.refresh.min.buffer.seconds}</td> |
| * </tr> |
| * </table> |
| * |
| * @see OAuthBearerLoginModule |
| * @see SaslConfigs#SASL_LOGIN_REFRESH_WINDOW_FACTOR_DOC |
| * @see SaslConfigs#SASL_LOGIN_REFRESH_WINDOW_JITTER_DOC |
| * @see SaslConfigs#SASL_LOGIN_REFRESH_MIN_PERIOD_SECONDS_DOC |
| * @see SaslConfigs#SASL_LOGIN_REFRESH_BUFFER_SECONDS_DOC |
| */ |
| public class OAuthBearerRefreshingLogin implements Login { |
| private static final Logger log = LoggerFactory.getLogger(OAuthBearerRefreshingLogin.class); |
| private ExpiringCredentialRefreshingLogin expiringCredentialRefreshingLogin = null; |
| |
| @Override |
| public void configure(Map<String, ?> configs, String contextName, Configuration configuration, |
| AuthenticateCallbackHandler loginCallbackHandler) { |
| /* |
| * Specify this class as the one to synchronize on so that only one OAuth 2 |
| * Bearer Token is refreshed at a given time. Specify null if we don't mind |
| * multiple simultaneously refreshes. Refreshes happen on the order of minutes |
| * rather than seconds or milliseconds, and there are typically minutes of |
| * lifetime remaining when the refresh occurs, so serializing them seems |
| * reasonable. |
| */ |
| Class<OAuthBearerRefreshingLogin> classToSynchronizeOnPriorToRefresh = OAuthBearerRefreshingLogin.class; |
| expiringCredentialRefreshingLogin = new ExpiringCredentialRefreshingLogin(contextName, configuration, |
| new ExpiringCredentialRefreshConfig(configs, true), loginCallbackHandler, |
| classToSynchronizeOnPriorToRefresh) { |
| @Override |
| public ExpiringCredential expiringCredential() { |
| Set<OAuthBearerToken> privateCredentialTokens = expiringCredentialRefreshingLogin.subject() |
| .getPrivateCredentials(OAuthBearerToken.class); |
| if (privateCredentialTokens.isEmpty()) |
| return null; |
| final OAuthBearerToken token = privateCredentialTokens.iterator().next(); |
| if (log.isDebugEnabled()) |
| log.debug("Found expiring credential with principal '{}'.", token.principalName()); |
| return new ExpiringCredential() { |
| @Override |
| public String principalName() { |
| return token.principalName(); |
| } |
| |
| @Override |
| public Long startTimeMs() { |
| return token.startTimeMs(); |
| } |
| |
| @Override |
| public long expireTimeMs() { |
| return token.lifetimeMs(); |
| } |
| |
| @Override |
| public Long absoluteLastRefreshTimeMs() { |
| return null; |
| } |
| }; |
| } |
| }; |
| } |
| |
| @Override |
| public void close() { |
| if (expiringCredentialRefreshingLogin != null) |
| expiringCredentialRefreshingLogin.close(); |
| } |
| |
| @Override |
| public Subject subject() { |
| return expiringCredentialRefreshingLogin != null ? expiringCredentialRefreshingLogin.subject() : null; |
| } |
| |
| @Override |
| public String serviceName() { |
| return expiringCredentialRefreshingLogin != null ? expiringCredentialRefreshingLogin.serviceName() : null; |
| } |
| |
| @Override |
| public synchronized LoginContext login() throws LoginException { |
| if (expiringCredentialRefreshingLogin != null) |
| return expiringCredentialRefreshingLogin.login(); |
| throw new LoginException("Login was not configured properly"); |
| } |
| } |