1    
2    /* ====================================================================
3     * The Apache Software License, Version 1.1
4     *
5     * Copyright (c) 2002 The Apache Software Foundation.  All rights
6     * reserved.
7     *
8     * Redistribution and use in source and binary forms, with or without
9     * modification, are permitted provided that the following conditions
10    * are met:
11    *
12    * 1. Redistributions of source code must retain the above copyright
13    *    notice, this list of conditions and the following disclaimer.
14    *
15    * 2. Redistributions in binary form must reproduce the above copyright
16    *    notice, this list of conditions and the following disclaimer in
17    *    the documentation and/or other materials provided with the
18    *    distribution.
19    *
20    * 3. The end-user documentation included with the redistribution,
21    *    if any, must include the following acknowledgment:
22    *       "This product includes software developed by the
23    *        Apache Software Foundation (http://www.apache.org/)."
24    *    Alternately, this acknowledgment may appear in the software itself,
25    *    if and wherever such third-party acknowledgments normally appear.
26    *
27    * 4. The names "Apache" and "Apache Software Foundation" and
28    *    "Apache POI" must not be used to endorse or promote products
29    *    derived from this software without prior written permission. For
30    *    written permission, please contact apache@apache.org.
31    *
32    * 5. Products derived from this software may not be called "Apache",
33    *    "Apache POI", nor may "Apache" appear in their name, without
34    *    prior written permission of the Apache Software Foundation.
35    *
36    * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
37    * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
38    * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
39    * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
40    * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41    * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
42    * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
43    * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
44    * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
45    * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
46    * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
47    * SUCH DAMAGE.
48    * ====================================================================
49    *
50    * This software consists of voluntary contributions made by many
51    * individuals on behalf of the Apache Software Foundation.  For more
52    * information on the Apache Software Foundation, please see
53    * <http://www.apache.org/>.
54    */
55   
56   package org.apache.poi.hssf.record;
57   
58   import org.apache.poi.util.LittleEndian;
59   
60   /**
61    * Title:        Protection Revision 4 password Record<P>
62    * Description:  Stores the (2 byte??!!) encrypted password for a shared
63    *               workbook<P>
64    * REFERENCE:  PG 374 Microsoft Excel 97 Developer's Kit (ISBN: 1-57231-498-2)<P>
65    * @author Andrew C. Oliver (acoliver at apache dot org)
66    * @version 2.0-pre
67    */
68   
69   public class PasswordRev4Record
70       extends Record
71   {
72       public final static short sid = 0x1BC;
73       private short             field_1_password;
74   
75       public PasswordRev4Record()
76       {
77       }
78   
79       /**
80        * Constructs a PasswordRev4 (PROT4REVPASS) record and sets its fields appropriately.
81        *
82        * @param id     id must be 0x1bc or an exception will be throw upon validation
83        * @param size  the size of the data area of the record
84        * @param data  data of the record (should not contain sid/len)
85        */
86   
87       public PasswordRev4Record(short id, short size, byte [] data)
88       {
89           super(id, size, data);
90       }
91   
92       /**
93        * Constructs a PasswordRev4 (PROT4REVPASS) record and sets its fields appropriately.
94        *
95        * @param id     id must be 0x1bc or an exception will be throw upon validation
96        * @param size  the size of the data area of the record
97        * @param data  data of the record (should not contain sid/len)
98        * @param offset of the data
99        */
100  
101      public PasswordRev4Record(short id, short size, byte [] data, int offset)
102      {
103          super(id, size, data, offset);
104      }
105  
106      protected void validateSid(short id)
107      {
108          if (id != sid)
109          {
110              throw new RecordFormatException("NOT A PROT4REVPASSWORD RECORD");
111          }
112      }
113  
114      protected void fillFields(byte [] data, short size, int offset)
115      {
116          field_1_password = LittleEndian.getShort(data, 0 + offset);
117      }
118  
119      /**
120       * set the password
121       *
122       * @param pw  representing the password
123       */
124  
125      public void setPassword(short pw)
126      {
127          field_1_password = pw;
128      }
129  
130      /**
131       * get the password
132       *
133       * @return short  representing the password
134       */
135  
136      public short getPassword()
137      {
138          return field_1_password;
139      }
140  
141      public String toString()
142      {
143          StringBuffer buffer = new StringBuffer();
144  
145          buffer.append("[PROT4REVPASSWORD]\n");
146          buffer.append("    .password       = ")
147              .append(Integer.toHexString(getPassword())).append("\n");
148          buffer.append("[/PROT4REVPASSWORD]\n");
149          return buffer.toString();
150      }
151  
152      public int serialize(int offset, byte [] data)
153      {
154          LittleEndian.putShort(data, 0 + offset, sid);
155          LittleEndian.putShort(data, 2 + offset,
156                                (( short ) 0x02));   // 2 bytes (6 total)
157          LittleEndian.putShort(data, 4 + offset, getPassword());
158          return getRecordSize();
159      }
160  
161      public int getRecordSize()
162      {
163          return 6;
164      }
165  
166      public short getSid()
167      {
168          return this.sid;
169      }
170  }
171