001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 * http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.apache.commons.compress.archivers.zip;
020
021/**
022 * PKCS#7 Encryption Recipient Certificate List (0x0019).
023 *
024 * <p>
025 * 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
026 * 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
027 * preserving public encryption key data. Individual security requirements may dictate that this data be omitted to deter information exposure.
028 * </p>
029 *
030 * <p>
031 * Note: all fields stored in Intel low-byte/high-byte order.
032 * </p>
033 *
034 * <pre>
035 *          Value     Size     Description
036 *          -----     ----     -----------
037 * (CStore) 0x0019    2 bytes  Tag for this "extra" block type
038 *          TSize     2 bytes  Size of the store data
039 *          Version   2 bytes  Format version number - must 0x0001 at this time
040 *          CStore    (var)    PKCS#7 data blob
041 * </pre>
042 *
043 * <p>
044 * <b>See the section describing the Strong Encryption Specification for details. Refer to the section in this document entitled "Incorporating PKWARE
045 * Proprietary Technology into Your Product" for more information.</b>
046 * </p>
047 *
048 * @NotThreadSafe
049 * @since 1.11
050 */
051public class X0019_EncryptionRecipientCertificateList extends PKWareExtraHeader {
052
053    static final ZipShort HEADER_ID = new ZipShort(0x0019);
054
055    public X0019_EncryptionRecipientCertificateList() {
056        super(HEADER_ID);
057    }
058
059}