ProtocolAccessControl


1   /*
2    * Copyright (C) 2005 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.filesys.server.auth.acl;
18  
19  import java.util.StringTokenizer  ;
20  
21  import org.alfresco.filesys.server.SrvSession;
22  import org.alfresco.filesys.server.core.SharedDevice;
23  
24  /**
25   * Protocol Access Control Class
26   * <p>
27   * Allow/disallow access to a share based on the protocol type.
28   */
29  public class ProtocolAccessControl extends AccessControl
30  {
31  
32      // Available protocol type names
33  
34      private static final String  [] _protoTypes = { "SMB", "CIFS", "NFS", "FTP" };
35  
36      // Parsed list of protocol types
37  
38      private String  [] m_checkList;
39  
40      /**
41       * Class constructor
42       * 
43       * @param protList String
44       * @param type String
45       * @param access int
46       */
47      protected ProtocolAccessControl(String   protList, String   type, int access)
48      {
49          super(protList, type, access);
50  
51          // Parse the protocol list
52  
53          m_checkList = listFromString(protList);
54      }
55  
56      /**
57       * Check if the protocol matches the access control protocol list and return the allowed access.
58       * 
59       * @param sess SrvSession
60       * @param share SharedDevice
61       * @param mgr AccessControlManager
62       * @return int
63       */
64      public int allowsAccess(SrvSession sess, SharedDevice share, AccessControlManager mgr)
65      {
66  
67          // Determine the session protocol type
68  
69          String   sessProto = null;
70          String   sessName = sess.getClass().getName();
71  
72          if (sessName.endsWith(".SMBSrvSession"))
73              sessProto = "CIFS";
74          else if (sessName.endsWith(".FTPSrvSession"))
75              sessProto = "FTP";
76          else if (sessName.endsWith(".NFSSrvSession"))
77              sessProto = "NFS";
78  
79          // Check if the session protocol type is in the protocols to be checked
80  
81          if (sessProto != null && indexFromList(sessProto, m_checkList, false) != -1)
82              return getAccess();
83          return Default;
84      }
85  
86      /**
87       * Validate the protocol list
88       * 
89       * @param protList String
90       * @return boolean
91       */
92      public static final boolean validateProtocolList(String   protList)
93      {
94  
95          // Check if the protocol list string is valid
96  
97          if (protList == null || protList.length() == 0)
98              return false;
99  
100         // Split the protocol list and validate each protocol name
101 
102         StringTokenizer   tokens = new StringTokenizer  (protList, ",");
103 
104         while (tokens.hasMoreTokens())
105         {
106 
107             // Get the current protocol name and validate
108 
109             String   name = tokens.nextToken().toUpperCase();
110             if (indexFromList(name, _protoTypes, false) == -1)
111                 return false;
112         }
113 
114         // Protocol list is valid
115 
116         return true;
117     }
118 }
119
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