NTLMChallenge


1   /*
2    * Copyright (C) 2006 Alfresco, Inc.
3    *
4    * Licensed under the Mozilla Public License version 1.1
5    * with a permitted attribution clause. You may obtain a
6    * copy of the License at
7    *
8    *   http://www.alfresco.org/legal/license.txt
9    *
10   * Unless required by applicable law or agreed to in writing,
11   * software distributed under the License is distributed on an
12   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
13   * either express or implied. See the License for the specific
14   * language governing permissions and limitations under the
15   * License.
16   */
17  package org.alfresco.repo.security.authentication.ntlm;
18  
19  import org.alfresco.filesys.util.HexDump;
20  
21  /**
22   * Contains the NTLM challenge bytes.
23   * 
24   * @author GKSpencer
25   */
26  public class NTLMChallenge
27  {
28      // Challenge bytes
29      
30      private byte[] m_challenge;
31      
32      /**
33       * Class constructor
34       * 
35       * @param chbyts byte[]
36       */
37      protected NTLMChallenge(byte[] chbyts)
38      {
39          m_challenge = chbyts;
40      }
41      
42      /**
43       * Return the challenge bytes
44       * 
45       * @return byte[]
46       */
47      public final byte[] getBytes()
48      {
49          return m_challenge;
50      }
51      
52      /**
53       * Check for object equality
54       * 
55       * @param obj Object
56       * @return boolean
57       */
58      public boolean equals(Object   obj)
59      {
60          if ( obj instanceof NTLMChallenge)
61          {
62              NTLMChallenge ntlmCh = (NTLMChallenge) obj;
63              
64              // Check if both challenges are null
65              
66              if ( getBytes() == null && ntlmCh.getBytes() == null)
67                  return true;
68              
69              // Check if both challenges are the same length
70              
71              if ( getBytes() != null && ntlmCh.getBytes() != null &&
72                      getBytes().length == ntlmCh.getBytes().length)
73              {
74                  // Check if challenages are the same value
75                  
76                  byte[] ntlmBytes = ntlmCh.getBytes();
77                  
78                  for ( int i = 0; i < m_challenge.length; i++)
79                      if ( m_challenge[i] != ntlmBytes[i])
80                          return false;
81              }
82              else
83                  return false;
84          }
85          
86          // Not the same type
87          
88          return false;
89      }
90      
91      /**
92       * Return the challenge as a string
93       * 
94       * @return String
95       */
96      public String   toString()
97      {
98          StringBuilder   str = new StringBuilder  ();
99          
100         str.append("[");
101         str.append(HexDump.hexString(getBytes(), " "));
102         str.append("]");
103         
104         return str.toString();
105     }
106 }
107
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