View Javadoc
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  package org.apache.commons.compress.archivers.zip;
20  
21  /**
22   * PKCS#7 Encryption Recipient Certificate List (0x0019).
23   *
24   * <p>
25   * This field MAY contain information about each of the certificates used in encryption processing and it can be used to identify who is allowed to decrypt
26   * encrypted files. This field should only appear in the archive extra data record. This field is not required and serves only to aid archive modifications by
27   * preserving public encryption key data. Individual security requirements may dictate that this data be omitted to deter information exposure.
28   * </p>
29   *
30   * <p>
31   * Note: all fields stored in Intel low-byte/high-byte order.
32   * </p>
33   *
34   * <pre>
35   *          Value     Size     Description
36   *          -----     ----     -----------
37   * (CStore) 0x0019    2 bytes  Tag for this "extra" block type
38   *          TSize     2 bytes  Size of the store data
39   *          Version   2 bytes  Format version number - must 0x0001 at this time
40   *          CStore    (var)    PKCS#7 data blob
41   * </pre>
42   *
43   * <p>
44   * <b>See the section describing the Strong Encryption Specification for details. Refer to the section in this document entitled "Incorporating PKWARE
45   * Proprietary Technology into Your Product" for more information.</b>
46   * </p>
47   *
48   * @NotThreadSafe
49   * @since 1.11
50   */
51  public class X0019_EncryptionRecipientCertificateList extends PKWareExtraHeader {
52  
53      static final ZipShort HEADER_ID = new ZipShort(0x0019);
54  
55      public X0019_EncryptionRecipientCertificateList() {
56          super(HEADER_ID);
57      }
58  
59  }