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}