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,
13   *  software distributed under the License is distributed on an
14   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   *  KIND, either express or implied.  See the License for the
16   *  specific language governing permissions and limitations
17   *  under the License. 
18   *  
19   */
20  package org.apache.directory.server.kerberos.shared.crypto.encryption;
21  
22  
23  /**
24   * Helper for determining whether various ciphers are supported by the JRE.  For now
25   * determinations are based solely on JRE vendor.
26   *
27   * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
28   * @version $Rev$, $Date$
29   */
30  public class VendorHelper
31  {
32      private static final String vendor = System.getProperty( "java.vendor" ).toLowerCase();
33  
34  
35      static String getTripleDesAlgorithm()
36      {
37          if ( isIbm() )
38          {
39              return "3DES";
40          }
41          else
42          {
43              return "DESede";
44          }
45      }
46  
47  
48      static boolean isCtsSupported()
49      {
50          return vendor.contains( "sun" );
51      }
52  
53  
54      static boolean isArcFourHmacSupported()
55      {
56          return vendor.contains( "sun" );
57      }
58  
59  
60      static boolean isTripleDesSupported()
61      {
62          return vendor.contains( "sun" );
63      }
64  
65  
66      static boolean isIbm()
67      {
68          return vendor.contains( "ibm" );
69      }
70  }