/**
 * 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.hadoop.hdfs.server.common;

import java.io.IOException;
import org.apache.hadoop.security.token.delegation.AbstractDelegationTokenIdentifier;

/**
 * Interface to verify delegation tokens passed through WebHDFS.
 * Implementations are intercepted by JspHelper that pass delegation token
 * for verification.
 */
public interface TokenVerifier<T extends AbstractDelegationTokenIdentifier> {

  /* Verify delegation token passed through WebHDFS
   * Name node, Router implement this for JspHelper to verify token
   */
  void verifyToken(T t, byte[] password) throws IOException;

}