https://commons.apache.org/proper/commons-compress/: Apache Commons Compress software defines an API for working with compression and archive formats. These include: bzip2, gzip, pack200, lzma, xz, Snappy, traditional Unix Compress, DEFLATE, DEFLATE64, LZ4, Brotli, Zstandard and ar, cpio, jar, tar, zip, dump, 7z, arj. (The Apache Software Foundation)
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  • Christian Kohlschütte
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  • Simon Spero
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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.commons.compress.archivers.zip;


PKCS#7 Encryption Recipient Certificate List (0x0019).

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 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 preserving public encryption key data. Individual security
requirements may dictate that this data be omitted to deter information
exposure.


Note: all fields stored in Intel low-byte/high-byte order.


         Value     Size     Description
         -----     ----     -----------
(CStore) 0x0019    2 bytes  Tag for this "extra" block type
         TSize     2 bytes  Size of the store data
         Version   2 bytes  Format version number - must 0x0001 at this time
         CStore    (var)    PKCS#7 data blob



See the section describing the Strong Encryption Specification for
details. Refer to the section in this document entitled
"Incorporating PKWARE Proprietary Technology into Your Product" for more
information.


@NotThreadSafe
Since:1.11
/**
 * PKCS#7 Encryption Recipient Certificate List (0x0019).
 *
 * <p>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 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 preserving public encryption key data. Individual security
 * requirements may dictate that this data be omitted to deter information
 * exposure.</p>
 *
 * <p>Note: all fields stored in Intel low-byte/high-byte order.</p>
 *
 * <pre>
 *          Value     Size     Description
 *          -----     ----     -----------
 * (CStore) 0x0019    2 bytes  Tag for this "extra" block type
 *          TSize     2 bytes  Size of the store data
 *          Version   2 bytes  Format version number - must 0x0001 at this time
 *          CStore    (var)    PKCS#7 data blob
 * </pre>
 *
 * <p><b>See the section describing the Strong Encryption Specification for
 * details. Refer to the section in this document entitled
 * "Incorporating PKWARE Proprietary Technology into Your Product" for more
 * information.</b></p>
 *
 * @NotThreadSafe
 * @since 1.11
 */
public class X0019_EncryptionRecipientCertificateList extends PKWareExtraHeader {

    public X0019_EncryptionRecipientCertificateList() {
        super(new ZipShort(0x0019));
    }

}