    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
    021import java.util.zip.ZipException;
    022
    023/**
    024 * X.509 Certificate ID and Signature for individual file (0x0015).
    025 *
    026 * <p>This field contains the information about which certificate in the PKCS#7
    027 * store was used to sign a particular file. It also contains the signature
    028 * data. This field can appear multiple times, but can only appear once per
    029 * certificate.</p>
    030 *
    031 * <p>Note: all fields stored in Intel low-byte/high-byte order.</p>
    032 *
    033 * <pre>
    034 *         Value     Size     Description
    035 *         -----     ----     -----------
    036 * (CID)   0x0015    2 bytes  Tag for this "extra" block type
    037 *         TSize     2 bytes  Size of data that follows
    038 *         RCount    4 bytes  Number of recipients. (inferred)
    039 *         HashAlg   2 bytes  Hash algorithm identifier. (inferred)
    040 *         TData     TSize    Signature Data
    041 * </pre>
    042 *
    043 * @NotThreadSafe
    044 * @since 1.11
    045 */
    046public class X0015_CertificateIdForFile extends PKWareExtraHeader {
    047
    048    public X0015_CertificateIdForFile() {
    049        super(new ZipShort(0x0015));
    050    }
    051
    052    private int rcount;
    053    private HashAlgorithm hashAlg;
    054
    055    /**
    056     * Get record count.
    057     * @return the record count
    058     */
    059    public int getRecordCount() {
    060        return rcount;
    061    }
    062
    063    /**
    064     * Get hash algorithm.
    065     * @return the hash algorithm
    066     */
    067    public HashAlgorithm getHashAlgorithm() {
    068        return hashAlg;
    069    }
    070
    071    @Override
    072    public void parseFromCentralDirectoryData(final byte[] data, final int offset, final int length)
    073        throws ZipException {
    074        assertMinimalLength(4, length);
    075        super.parseFromCentralDirectoryData(data, offset, length);
    076        this.rcount = ZipShort.getValue(data, offset);
    077        this.hashAlg = HashAlgorithm.getAlgorithmByCode(ZipShort.getValue(data, offset + 2));
    078    }
    079}