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 * https://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 /**
56 * Constructs a new instance.
57 */
58 public X0019_EncryptionRecipientCertificateList() {
59 super(HEADER_ID);
60 }
61
62 }