001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hdfs.security.token.block;
019
020import java.io.IOException;
021import java.util.EnumSet;
022import java.util.HashMap;
023import java.util.Map;
024
025import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
026import org.apache.hadoop.hdfs.security.token.block.BlockTokenSecretManager.AccessMode;
027import org.apache.hadoop.security.token.SecretManager;
028import org.apache.hadoop.security.token.Token;
029
030/**
031 * Manages a {@link BlockTokenSecretManager} per block pool. Routes the requests
032 * given a block pool Id to corresponding {@link BlockTokenSecretManager}
033 */
034public class BlockPoolTokenSecretManager extends
035    SecretManager<BlockTokenIdentifier> {
036  
037  private final Map<String, BlockTokenSecretManager> map = 
038    new HashMap<String, BlockTokenSecretManager>();
039
040  /**
041   * Add a block pool Id and corresponding {@link BlockTokenSecretManager} to map
042   * @param bpid block pool Id
043   * @param secretMgr {@link BlockTokenSecretManager}
044   */
045  public synchronized void addBlockPool(String bpid,
046      BlockTokenSecretManager secretMgr) {
047    map.put(bpid, secretMgr);
048  }
049
050  synchronized BlockTokenSecretManager get(String bpid) {
051    BlockTokenSecretManager secretMgr = map.get(bpid);
052    if (secretMgr == null) {
053      throw new IllegalArgumentException("Block pool " + bpid
054          + " is not found");
055    }
056    return secretMgr;
057  }
058  
059  public synchronized boolean isBlockPoolRegistered(String bpid) {
060    return map.containsKey(bpid);
061  }
062
063  /** Return an empty BlockTokenIdentifer */
064  @Override
065  public BlockTokenIdentifier createIdentifier() {
066    return new BlockTokenIdentifier();
067  }
068
069  @Override
070  public byte[] createPassword(BlockTokenIdentifier identifier) {
071    return get(identifier.getBlockPoolId()).createPassword(identifier);
072  }
073
074  @Override
075  public byte[] retrievePassword(BlockTokenIdentifier identifier)
076      throws InvalidToken {
077    return get(identifier.getBlockPoolId()).retrievePassword(identifier);
078  }
079
080  /**
081   * See {@link BlockTokenSecretManager#checkAccess(BlockTokenIdentifier, 
082   *                String, ExtendedBlock, AccessMode)}
083   */
084  public void checkAccess(BlockTokenIdentifier id, String userId,
085      ExtendedBlock block, AccessMode mode) throws InvalidToken {
086    get(block.getBlockPoolId()).checkAccess(id, userId, block, mode);
087  }
088
089  /**
090   * See {@link BlockTokenSecretManager#checkAccess(Token, String, 
091   *                ExtendedBlock, AccessMode)}
092   */
093  public void checkAccess(Token<BlockTokenIdentifier> token,
094      String userId, ExtendedBlock block, AccessMode mode) throws InvalidToken {
095    get(block.getBlockPoolId()).checkAccess(token, userId, block, mode);
096  }
097
098  /**
099   * See {@link BlockTokenSecretManager#setKeys(ExportedBlockKeys)}
100   */
101  public void setKeys(String bpid, ExportedBlockKeys exportedKeys)
102      throws IOException {
103    get(bpid).setKeys(exportedKeys);
104  }
105
106  /**
107   * See {@link BlockTokenSecretManager#generateToken(ExtendedBlock, EnumSet)}
108   */
109  public Token<BlockTokenIdentifier> generateToken(ExtendedBlock b,
110      EnumSet<AccessMode> of) throws IOException {
111    return get(b.getBlockPoolId()).generateToken(b, of);
112  }
113}