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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *     http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.accumulo.core.util.shell.commands;
18  
19  import java.io.IOException;
20  import java.util.Map;
21  import java.util.Set;
22  
23  import org.apache.accumulo.core.client.AccumuloException;
24  import org.apache.accumulo.core.client.AccumuloSecurityException;
25  import org.apache.accumulo.core.util.shell.Shell;
26  import org.apache.accumulo.core.util.shell.Shell.Command;
27  import org.apache.accumulo.core.util.shell.Token;
28  import org.apache.commons.cli.CommandLine;
29  
30  public class AuthenticateCommand extends Command {
31    @Override
32    public int execute(final String fullCommand, final CommandLine cl, final Shell shellState) throws AccumuloException, AccumuloSecurityException, IOException {
33      final String user = cl.getArgs()[0];
34      final String p = shellState.readMaskedLine("Enter current password for '" + user + "': ", '*');
35      if (p == null) {
36        shellState.getReader().printNewline();
37        return 0;
38      } // user canceled
39      final byte[] password = p.getBytes();
40      final boolean valid = shellState.getConnector().securityOperations().authenticateUser(user, password);
41      shellState.getReader().printString((valid ? "V" : "Not v") + "alid\n");
42      return 0;
43    }
44    
45    @Override
46    public String description() {
47      return "verifies a user's credentials";
48    }
49    
50    @Override
51    public String usage() {
52      return getName() + " <username>";
53    }
54    
55    @Override
56    public void registerCompletion(final Token root, final Map<Command.CompletionSet,Set<String>> completionSet) {
57      registerCompletionForUsers(root, completionSet);
58    }
59    
60    @Override
61    public int numArgs() {
62      return 1;
63    }
64  }