kafka AuthenticateCallbackHandler 源码

  • 2022-10-20
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kafka AuthenticateCallbackHandler 代码

文件路径:/clients/src/main/java/org/apache/kafka/common/security/auth/AuthenticateCallbackHandler.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.auth;

import java.util.List;
import java.util.Map;

import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.login.AppConfigurationEntry;

/*
 * Callback handler for SASL-based authentication
 */
public interface AuthenticateCallbackHandler extends CallbackHandler {

    /**
     * Configures this callback handler for the specified SASL mechanism.
     *
     * @param configs Key-value pairs containing the parsed configuration options of
     *        the client or broker. Note that these are the Kafka configuration options
     *        and not the JAAS configuration options. JAAS config options may be obtained
     *        from `jaasConfigEntries` for callbacks which obtain some configs from the
     *        JAAS configuration. For configs that may be specified as both Kafka config
     *        as well as JAAS config (e.g. sasl.kerberos.service.name), the configuration
     *        is treated as invalid if conflicting values are provided.
     * @param saslMechanism Negotiated SASL mechanism. For clients, this is the SASL
     *        mechanism configured for the client. For brokers, this is the mechanism
     *        negotiated with the client and is one of the mechanisms enabled on the broker.
     * @param jaasConfigEntries JAAS configuration entries from the JAAS login context.
     *        This list contains a single entry for clients and may contain more than
     *        one entry for brokers if multiple mechanisms are enabled on a listener using
     *        static JAAS configuration where there is no mapping between mechanisms and
     *        login module entries. In this case, callback handlers can use the login module in
     *        `jaasConfigEntries` to identify the entry corresponding to `saslMechanism`.
     *        Alternatively, dynamic JAAS configuration option
     *        {@link org.apache.kafka.common.config.SaslConfigs#SASL_JAAS_CONFIG} may be
     *        configured on brokers with listener and mechanism prefix, in which case
     *        only the configuration entry corresponding to `saslMechanism` will be provided
     *        in `jaasConfigEntries`.
     */
    void configure(Map<String, ?> configs, String saslMechanism, List<AppConfigurationEntry> jaasConfigEntries);

    /**
     * Closes this instance.
     */
    void close();
}

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