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1   /**
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *     http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  package org.apache.hadoop.hbase.security.visibility;
19  
20  import java.util.List;
21  
22  import org.apache.commons.logging.Log;
23  import org.apache.commons.logging.LogFactory;
24  import org.apache.hadoop.classification.InterfaceAudience;
25  import org.apache.hadoop.conf.Configuration;
26  import org.apache.hadoop.hbase.security.User;
27  
28  /**
29   * This ScanLabelGenerator enforces a set of predefined authorizations for a
30   * given user, the set defined by the admin using the VisibilityClient admin
31   * interface or the set_auths shell command. Any authorizations requested with
32   * Scan#authorizations will be ignored.
33   */
34  @InterfaceAudience.Private
35  public class EnforcingScanLabelGenerator implements ScanLabelGenerator {
36  
37    private static final Log LOG = LogFactory.getLog(EnforcingScanLabelGenerator.class);
38  
39    private Configuration conf;
40    private VisibilityLabelsManager labelsManager;
41  
42    public EnforcingScanLabelGenerator() {
43      this.labelsManager = VisibilityLabelsManager.get();
44    }
45  
46    @Override
47    public void setConf(Configuration conf) {
48      this.conf = conf;
49    }
50  
51    @Override
52    public Configuration getConf() {
53      return this.conf;
54    }
55  
56    @Override
57    public List<String> getLabels(User user, Authorizations authorizations) {
58      String userName = user.getShortName();
59      if (authorizations != null) {
60        LOG.warn("Dropping authorizations requested by user " + userName + ": " + authorizations);
61      }
62      return this.labelsManager.getAuths(userName);
63    }
64  
65  }