    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}