757 lines
27 KiB
Java
757 lines
27 KiB
Java
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/*
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* Copyright (C) 2014 The Android Open Source Project
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* Copyright (c) 1995, 2020, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package java.util.zip;
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import static java.util.zip.ZipUtils.*;
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import java.nio.charset.StandardCharsets;
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import java.nio.file.attribute.FileTime;
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import java.util.Objects;
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import java.util.concurrent.TimeUnit;
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import java.time.LocalDateTime;
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import java.time.ZonedDateTime;
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import java.time.ZoneId;
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import static java.util.zip.ZipConstants64.*;
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/**
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* This class is used to represent a ZIP file entry.
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*
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* @author David Connelly
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* @since 1.1
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*/
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public class ZipEntry implements ZipConstants, Cloneable {
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String name; // entry name
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long xdostime = -1; // last modification time (in extended DOS time,
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// where milliseconds lost in conversion might
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// be encoded into the upper half)
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FileTime mtime; // last modification time, from extra field data
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FileTime atime; // last access time, from extra field data
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FileTime ctime; // creation time, from extra field data
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long crc = -1; // crc-32 of entry data
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long size = -1; // uncompressed size of entry data
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long csize = -1; // compressed size of entry data
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boolean csizeSet = false; // Only true if csize was explicitely set by
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// a call to setCompressedSize()
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int method = -1; // compression method
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int flag = 0; // general purpose flag
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byte[] extra; // optional extra field data for entry
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String comment; // optional comment string for entry
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int extraAttributes = -1; // e.g. POSIX permissions, sym links.
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// Android-added: Add dataOffset for internal use.
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// Used by android.util.jar.StrictJarFile from frameworks.
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long dataOffset;
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/**
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* Compression method for uncompressed entries.
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*/
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public static final int STORED = 0;
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/**
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* Compression method for compressed (deflated) entries.
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*/
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public static final int DEFLATED = 8;
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/**
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* DOS time constant for representing timestamps before 1980.
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*/
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static final long DOSTIME_BEFORE_1980 = (1 << 21) | (1 << 16);
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/**
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* Approximately 128 years, in milliseconds (ignoring leap years etc).
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*
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* This establish an approximate high-bound value for DOS times in
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* milliseconds since epoch, used to enable an efficient but
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* sufficient bounds check to avoid generating extended last modified
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* time entries.
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*
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* Calculating the exact number is locale dependent, would require loading
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* TimeZone data eagerly, and would make little practical sense. Since DOS
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* times theoretically go to 2107 - with compatibility not guaranteed
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* after 2099 - setting this to a time that is before but near 2099
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* should be sufficient.
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* @hide
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*/
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// Android-changed: Make UPPER_DOSTIME_BOUND public hidden for testing purposes.
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public static final long UPPER_DOSTIME_BOUND =
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128L * 365 * 24 * 60 * 60 * 1000;
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// Android-added: New constructor for use by StrictJarFile native code.
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/** @hide */
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public ZipEntry(String name, String comment, long crc, long compressedSize,
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long size, int compressionMethod, int xdostime, byte[] extra,
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long dataOffset) {
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this.name = name;
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this.comment = comment;
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this.crc = crc;
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this.csize = compressedSize;
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this.size = size;
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this.method = compressionMethod;
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this.xdostime = xdostime;
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this.dataOffset = dataOffset;
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this.setExtra0(extra, false, false);
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}
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/**
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* Creates a new zip entry with the specified name.
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*
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* @param name
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* The entry name
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*
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* @throws NullPointerException if the entry name is null
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* @throws IllegalArgumentException if the entry name is longer than
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* 0xFFFF bytes
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*/
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public ZipEntry(String name) {
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Objects.requireNonNull(name, "name");
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// Android-changed: Explicitly use UTF_8 instead of the default charset.
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// if (name.length() > 0xFFFF) {
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// throw new IllegalArgumentException("entry name too long");
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// }
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if (name.getBytes(StandardCharsets.UTF_8).length > 0xffff) {
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throw new IllegalArgumentException(name + " too long: " +
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name.getBytes(StandardCharsets.UTF_8).length);
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}
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this.name = name;
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}
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/**
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* Creates a new zip entry with fields taken from the specified
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* zip entry.
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*
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* @param e
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* A zip Entry object
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*
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* @throws NullPointerException if the entry object is null
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*/
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public ZipEntry(ZipEntry e) {
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Objects.requireNonNull(e, "entry");
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name = e.name;
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xdostime = e.xdostime;
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mtime = e.mtime;
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atime = e.atime;
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ctime = e.ctime;
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crc = e.crc;
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size = e.size;
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csize = e.csize;
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csizeSet = e.csizeSet;
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method = e.method;
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flag = e.flag;
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extra = e.extra;
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comment = e.comment;
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extraAttributes = e.extraAttributes;
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// Android-added: Add dataOffset for internal use.
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dataOffset = e.dataOffset;
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}
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/**
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* Creates a new un-initialized zip entry
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*/
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ZipEntry() {}
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// BEGIN Android-added: Add dataOffset for internal use.
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/** @hide */
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public long getDataOffset() {
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return dataOffset;
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}
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// END Android-added: Add dataOffset for internal use.
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/**
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* Returns the name of the entry.
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* @return the name of the entry
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*/
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public String getName() {
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return name;
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}
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/**
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* Sets the last modification time of the entry.
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*
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* <p> If the entry is output to a ZIP file or ZIP file formatted
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* output stream the last modification time set by this method will
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* be stored into the {@code date and time fields} of the zip file
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* entry and encoded in standard {@code MS-DOS date and time format}.
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* The {@link java.util.TimeZone#getDefault() default TimeZone} is
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* used to convert the epoch time to the MS-DOS data and time.
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*
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* @param time
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* The last modification time of the entry in milliseconds
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* since the epoch
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*
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* @see #getTime()
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* @see #getLastModifiedTime()
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*/
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public void setTime(long time) {
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this.xdostime = javaToExtendedDosTime(time);
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// Avoid setting the mtime field if time is in the valid
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// range for a DOS time
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if (this.xdostime != DOSTIME_BEFORE_1980 && time <= UPPER_DOSTIME_BOUND) {
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this.mtime = null;
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} else {
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int localYear = javaEpochToLocalDateTime(time).getYear();
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if (localYear >= 1980 && localYear <= 2099) {
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this.mtime = null;
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} else {
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this.mtime = FileTime.from(time, TimeUnit.MILLISECONDS);
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}
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}
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}
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/**
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* Returns the last modification time of the entry.
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*
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* <p> If the entry is read from a ZIP file or ZIP file formatted
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* input stream, this is the last modification time from the {@code
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* date and time fields} of the zip file entry. The
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* {@link java.util.TimeZone#getDefault() default TimeZone} is used
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* to convert the standard MS-DOS formatted date and time to the
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* epoch time.
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*
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* @return The last modification time of the entry in milliseconds
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* since the epoch, or -1 if not specified
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*
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* @see #setTime(long)
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* @see #setLastModifiedTime(FileTime)
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*/
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public long getTime() {
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if (mtime != null) {
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return mtime.toMillis();
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}
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return (xdostime != -1) ? extendedDosToJavaTime(xdostime) : -1;
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}
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/**
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* Sets the last modification time of the entry in local date-time.
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*
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* <p> If the entry is output to a ZIP file or ZIP file formatted
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* output stream the last modification time set by this method will
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* be stored into the {@code date and time fields} of the zip file
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* entry and encoded in standard {@code MS-DOS date and time format}.
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* If the date-time set is out of the range of the standard {@code
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* MS-DOS date and time format}, the time will also be stored into
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* zip file entry's extended timestamp fields in {@code optional
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* extra data} in UTC time. The {@link java.time.ZoneId#systemDefault()
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* system default TimeZone} is used to convert the local date-time
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* to UTC time.
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*
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* <p> {@code LocalDateTime} uses a precision of nanoseconds, whereas
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* this class uses a precision of milliseconds. The conversion will
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* truncate any excess precision information as though the amount in
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* nanoseconds was subject to integer division by one million.
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*
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* @param time
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* The last modification time of the entry in local date-time
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*
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* @see #getTimeLocal()
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* @since 9
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*/
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public void setTimeLocal(LocalDateTime time) {
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int year = time.getYear() - 1980;
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if (year < 0) {
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this.xdostime = DOSTIME_BEFORE_1980;
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} else {
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this.xdostime = ((year << 25 |
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time.getMonthValue() << 21 |
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time.getDayOfMonth() << 16 |
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time.getHour() << 11 |
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time.getMinute() << 5 |
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time.getSecond() >> 1) & 0xffffffffL)
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+ ((long)(((time.getSecond() & 0x1) * 1000) +
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time.getNano() / 1000_000) << 32);
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}
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if (xdostime != DOSTIME_BEFORE_1980 && year <= 0x7f) {
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this.mtime = null;
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} else {
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this.mtime = FileTime.from(
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ZonedDateTime.of(time, ZoneId.systemDefault()).toInstant());
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}
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}
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/**
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* Returns the last modification time of the entry in local date-time.
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*
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* <p> If the entry is read from a ZIP file or ZIP file formatted
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* input stream, this is the last modification time from the zip
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* file entry's {@code optional extra data} if the extended timestamp
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* fields are present. Otherwise, the last modification time is read
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* from entry's standard MS-DOS formatted {@code date and time fields}.
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*
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* <p> The {@link java.time.ZoneId#systemDefault() system default TimeZone}
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* is used to convert the UTC time to local date-time.
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*
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* @return The last modification time of the entry in local date-time
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*
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* @see #setTimeLocal(LocalDateTime)
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* @since 9
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*/
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public LocalDateTime getTimeLocal() {
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if (mtime != null) {
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return LocalDateTime.ofInstant(mtime.toInstant(), ZoneId.systemDefault());
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}
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int ms = (int)(xdostime >> 32);
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return LocalDateTime.of((int)(((xdostime >> 25) & 0x7f) + 1980),
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(int)((xdostime >> 21) & 0x0f),
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(int)((xdostime >> 16) & 0x1f),
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(int)((xdostime >> 11) & 0x1f),
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(int)((xdostime >> 5) & 0x3f),
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(int)((xdostime << 1) & 0x3e) + ms / 1000,
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(ms % 1000) * 1000_000);
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}
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/**
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* Sets the last modification time of the entry.
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*
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* <p> When output to a ZIP file or ZIP file formatted output stream
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* the last modification time set by this method will be stored into
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* zip file entry's {@code date and time fields} in {@code standard
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* MS-DOS date and time format}), and the extended timestamp fields
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* in {@code optional extra data} in UTC time.
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*
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* @param time
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* The last modification time of the entry
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* @return This zip entry
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*
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* @throws NullPointerException if the {@code time} is null
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*
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* @see #getLastModifiedTime()
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* @since 1.8
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*/
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public ZipEntry setLastModifiedTime(FileTime time) {
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this.mtime = Objects.requireNonNull(time, "lastModifiedTime");
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this.xdostime = javaToExtendedDosTime(time.to(TimeUnit.MILLISECONDS));
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return this;
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}
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/**
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* Returns the last modification time of the entry.
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*
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* <p> If the entry is read from a ZIP file or ZIP file formatted
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* input stream, this is the last modification time from the zip
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* file entry's {@code optional extra data} if the extended timestamp
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* fields are present. Otherwise the last modification time is read
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* from the entry's {@code date and time fields}, the {@link
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* java.util.TimeZone#getDefault() default TimeZone} is used to convert
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* the standard MS-DOS formatted date and time to the epoch time.
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*
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* @return The last modification time of the entry, null if not specified
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*
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* @see #setLastModifiedTime(FileTime)
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|
* @since 1.8
|
||
|
|
*/
|
||
|
|
public FileTime getLastModifiedTime() {
|
||
|
|
if (mtime != null)
|
||
|
|
return mtime;
|
||
|
|
if (xdostime == -1)
|
||
|
|
return null;
|
||
|
|
return FileTime.from(getTime(), TimeUnit.MILLISECONDS);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Sets the last access time of the entry.
|
||
|
|
*
|
||
|
|
* <p> If set, the last access time will be stored into the extended
|
||
|
|
* timestamp fields of entry's {@code optional extra data}, when output
|
||
|
|
* to a ZIP file or ZIP file formatted stream.
|
||
|
|
*
|
||
|
|
* @param time
|
||
|
|
* The last access time of the entry
|
||
|
|
* @return This zip entry
|
||
|
|
*
|
||
|
|
* @throws NullPointerException if the {@code time} is null
|
||
|
|
*
|
||
|
|
* @see #getLastAccessTime()
|
||
|
|
* @since 1.8
|
||
|
|
*/
|
||
|
|
public ZipEntry setLastAccessTime(FileTime time) {
|
||
|
|
this.atime = Objects.requireNonNull(time, "lastAccessTime");
|
||
|
|
return this;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the last access time of the entry.
|
||
|
|
*
|
||
|
|
* <p> The last access time is from the extended timestamp fields
|
||
|
|
* of entry's {@code optional extra data} when read from a ZIP file
|
||
|
|
* or ZIP file formatted stream.
|
||
|
|
*
|
||
|
|
* @return The last access time of the entry, null if not specified
|
||
|
|
* @see #setLastAccessTime(FileTime)
|
||
|
|
* @since 1.8
|
||
|
|
*/
|
||
|
|
public FileTime getLastAccessTime() {
|
||
|
|
return atime;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Sets the creation time of the entry.
|
||
|
|
*
|
||
|
|
* <p> If set, the creation time will be stored into the extended
|
||
|
|
* timestamp fields of entry's {@code optional extra data}, when
|
||
|
|
* output to a ZIP file or ZIP file formatted stream.
|
||
|
|
*
|
||
|
|
* @param time
|
||
|
|
* The creation time of the entry
|
||
|
|
* @return This zip entry
|
||
|
|
*
|
||
|
|
* @throws NullPointerException if the {@code time} is null
|
||
|
|
*
|
||
|
|
* @see #getCreationTime()
|
||
|
|
* @since 1.8
|
||
|
|
*/
|
||
|
|
public ZipEntry setCreationTime(FileTime time) {
|
||
|
|
this.ctime = Objects.requireNonNull(time, "creationTime");
|
||
|
|
return this;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the creation time of the entry.
|
||
|
|
*
|
||
|
|
* <p> The creation time is from the extended timestamp fields of
|
||
|
|
* entry's {@code optional extra data} when read from a ZIP file
|
||
|
|
* or ZIP file formatted stream.
|
||
|
|
*
|
||
|
|
* @return the creation time of the entry, null if not specified
|
||
|
|
* @see #setCreationTime(FileTime)
|
||
|
|
* @since 1.8
|
||
|
|
*/
|
||
|
|
public FileTime getCreationTime() {
|
||
|
|
return ctime;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Sets the uncompressed size of the entry data.
|
||
|
|
*
|
||
|
|
* @param size the uncompressed size in bytes
|
||
|
|
*
|
||
|
|
* @throws IllegalArgumentException if the specified size is less
|
||
|
|
* than 0, is greater than 0xFFFFFFFF when
|
||
|
|
* <a href="package-summary.html#zip64">ZIP64 format</a> is not supported,
|
||
|
|
* or is less than 0 when ZIP64 is supported
|
||
|
|
* @see #getSize()
|
||
|
|
*/
|
||
|
|
public void setSize(long size) {
|
||
|
|
if (size < 0) {
|
||
|
|
throw new IllegalArgumentException("invalid entry size");
|
||
|
|
}
|
||
|
|
this.size = size;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the uncompressed size of the entry data.
|
||
|
|
*
|
||
|
|
* @return the uncompressed size of the entry data, or -1 if not known
|
||
|
|
* @see #setSize(long)
|
||
|
|
*/
|
||
|
|
public long getSize() {
|
||
|
|
return size;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the size of the compressed entry data.
|
||
|
|
*
|
||
|
|
* <p> In the case of a stored entry, the compressed size will be the same
|
||
|
|
* as the uncompressed size of the entry.
|
||
|
|
*
|
||
|
|
* @return the size of the compressed entry data, or -1 if not known
|
||
|
|
* @see #setCompressedSize(long)
|
||
|
|
*/
|
||
|
|
public long getCompressedSize() {
|
||
|
|
return csize;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Sets the size of the compressed entry data.
|
||
|
|
*
|
||
|
|
* @param csize the compressed size to set
|
||
|
|
*
|
||
|
|
* @see #getCompressedSize()
|
||
|
|
*/
|
||
|
|
public void setCompressedSize(long csize) {
|
||
|
|
this.csize = csize;
|
||
|
|
this.csizeSet = true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Sets the CRC-32 checksum of the uncompressed entry data.
|
||
|
|
*
|
||
|
|
* @param crc the CRC-32 value
|
||
|
|
*
|
||
|
|
* @throws IllegalArgumentException if the specified CRC-32 value is
|
||
|
|
* less than 0 or greater than 0xFFFFFFFF
|
||
|
|
* @see #getCrc()
|
||
|
|
*/
|
||
|
|
public void setCrc(long crc) {
|
||
|
|
if (crc < 0 || crc > 0xFFFFFFFFL) {
|
||
|
|
throw new IllegalArgumentException("invalid entry crc-32");
|
||
|
|
}
|
||
|
|
this.crc = crc;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the CRC-32 checksum of the uncompressed entry data.
|
||
|
|
*
|
||
|
|
* @return the CRC-32 checksum of the uncompressed entry data, or -1 if
|
||
|
|
* not known
|
||
|
|
*
|
||
|
|
* @see #setCrc(long)
|
||
|
|
*/
|
||
|
|
public long getCrc() {
|
||
|
|
return crc;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Sets the compression method for the entry.
|
||
|
|
*
|
||
|
|
* @param method the compression method, either STORED or DEFLATED
|
||
|
|
*
|
||
|
|
* @throws IllegalArgumentException if the specified compression
|
||
|
|
* method is invalid
|
||
|
|
* @see #getMethod()
|
||
|
|
*/
|
||
|
|
public void setMethod(int method) {
|
||
|
|
if (method != STORED && method != DEFLATED) {
|
||
|
|
throw new IllegalArgumentException("invalid compression method");
|
||
|
|
}
|
||
|
|
this.method = method;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the compression method of the entry.
|
||
|
|
*
|
||
|
|
* @return the compression method of the entry, or -1 if not specified
|
||
|
|
* @see #setMethod(int)
|
||
|
|
*/
|
||
|
|
public int getMethod() {
|
||
|
|
return method;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Sets the optional extra field data for the entry.
|
||
|
|
*
|
||
|
|
* <p> Invoking this method may change this entry's last modification
|
||
|
|
* time, last access time and creation time, if the {@code extra} field
|
||
|
|
* data includes the extensible timestamp fields, such as {@code NTFS tag
|
||
|
|
* 0x0001} or {@code Info-ZIP Extended Timestamp}, as specified in
|
||
|
|
* <a href="http://www.info-zip.org/doc/appnote-19970311-iz.zip">Info-ZIP
|
||
|
|
* Application Note 970311</a>.
|
||
|
|
*
|
||
|
|
* @param extra
|
||
|
|
* The extra field data bytes
|
||
|
|
*
|
||
|
|
* @throws IllegalArgumentException if the length of the specified
|
||
|
|
* extra field data is greater than 0xFFFF bytes
|
||
|
|
*
|
||
|
|
* @see #getExtra()
|
||
|
|
*/
|
||
|
|
public void setExtra(byte[] extra) {
|
||
|
|
setExtra0(extra, false, true);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Sets the optional extra field data for the entry.
|
||
|
|
*
|
||
|
|
* @param extra
|
||
|
|
* the extra field data bytes
|
||
|
|
* @param doZIP64
|
||
|
|
* if true, set size and csize from ZIP64 fields if present
|
||
|
|
* @param isLOC
|
||
|
|
* true if setting the extra field for a LOC, false if for
|
||
|
|
* a CEN
|
||
|
|
*/
|
||
|
|
void setExtra0(byte[] extra, boolean doZIP64, boolean isLOC) {
|
||
|
|
if (extra != null) {
|
||
|
|
if (extra.length > 0xFFFF) {
|
||
|
|
throw new IllegalArgumentException("invalid extra field length");
|
||
|
|
}
|
||
|
|
// extra fields are in "HeaderID(2)DataSize(2)Data... format
|
||
|
|
int off = 0;
|
||
|
|
int len = extra.length;
|
||
|
|
while (off + 4 < len) {
|
||
|
|
int tag = get16(extra, off);
|
||
|
|
int sz = get16(extra, off + 2);
|
||
|
|
off += 4;
|
||
|
|
if (off + sz > len) // invalid data
|
||
|
|
break;
|
||
|
|
switch (tag) {
|
||
|
|
case EXTID_ZIP64:
|
||
|
|
if (doZIP64) {
|
||
|
|
if (isLOC) {
|
||
|
|
// LOC extra zip64 entry MUST include BOTH original
|
||
|
|
// and compressed file size fields.
|
||
|
|
// If invalid zip64 extra fields, simply skip. Even
|
||
|
|
// it's rare, it's possible the entry size happens to
|
||
|
|
// be the magic value and it "accidently" has some
|
||
|
|
// bytes in extra match the id.
|
||
|
|
if (sz >= 16) {
|
||
|
|
size = get64(extra, off);
|
||
|
|
csize = get64(extra, off + 8);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
// CEN extra zip64
|
||
|
|
if (size == ZIP64_MAGICVAL) {
|
||
|
|
if (off + 8 > len) // invalid zip64 extra
|
||
|
|
break; // fields, just skip
|
||
|
|
size = get64(extra, off);
|
||
|
|
}
|
||
|
|
if (csize == ZIP64_MAGICVAL) {
|
||
|
|
if (off + 16 > len) // invalid zip64 extra
|
||
|
|
break; // fields, just skip
|
||
|
|
csize = get64(extra, off + 8);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case EXTID_NTFS:
|
||
|
|
if (sz < 32) // reserved 4 bytes + tag 2 bytes + size 2 bytes
|
||
|
|
break; // m[a|c]time 24 bytes
|
||
|
|
int pos = off + 4; // reserved 4 bytes
|
||
|
|
if (get16(extra, pos) != 0x0001 || get16(extra, pos + 2) != 24)
|
||
|
|
break;
|
||
|
|
long wtime = get64(extra, pos + 4);
|
||
|
|
if (wtime != WINDOWS_TIME_NOT_AVAILABLE) {
|
||
|
|
mtime = winTimeToFileTime(wtime);
|
||
|
|
}
|
||
|
|
wtime = get64(extra, pos + 12);
|
||
|
|
if (wtime != WINDOWS_TIME_NOT_AVAILABLE) {
|
||
|
|
atime = winTimeToFileTime(wtime);
|
||
|
|
}
|
||
|
|
wtime = get64(extra, pos + 20);
|
||
|
|
if (wtime != WINDOWS_TIME_NOT_AVAILABLE) {
|
||
|
|
ctime = winTimeToFileTime(wtime);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case EXTID_EXTT:
|
||
|
|
int flag = Byte.toUnsignedInt(extra[off]);
|
||
|
|
int sz0 = 1;
|
||
|
|
// The CEN-header extra field contains the modification
|
||
|
|
// time only, or no timestamp at all. 'sz' is used to
|
||
|
|
// flag its presence or absence. But if mtime is present
|
||
|
|
// in LOC it must be present in CEN as well.
|
||
|
|
if ((flag & 0x1) != 0 && (sz0 + 4) <= sz) {
|
||
|
|
mtime = unixTimeToFileTime(get32S(extra, off + sz0));
|
||
|
|
sz0 += 4;
|
||
|
|
}
|
||
|
|
if ((flag & 0x2) != 0 && (sz0 + 4) <= sz) {
|
||
|
|
atime = unixTimeToFileTime(get32S(extra, off + sz0));
|
||
|
|
sz0 += 4;
|
||
|
|
}
|
||
|
|
if ((flag & 0x4) != 0 && (sz0 + 4) <= sz) {
|
||
|
|
ctime = unixTimeToFileTime(get32S(extra, off + sz0));
|
||
|
|
sz0 += 4;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
}
|
||
|
|
off += sz;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
this.extra = extra;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the extra field data for the entry.
|
||
|
|
*
|
||
|
|
* @return the extra field data for the entry, or null if none
|
||
|
|
*
|
||
|
|
* @see #setExtra(byte[])
|
||
|
|
*/
|
||
|
|
public byte[] getExtra() {
|
||
|
|
return extra;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Sets the optional comment string for the entry.
|
||
|
|
*
|
||
|
|
* <p>ZIP entry comments have maximum length of 0xffff. If the length of the
|
||
|
|
* specified comment string is greater than 0xFFFF bytes after encoding, only
|
||
|
|
* the first 0xFFFF bytes are output to the ZIP file entry.
|
||
|
|
*
|
||
|
|
* @param comment the comment string
|
||
|
|
*
|
||
|
|
* @see #getComment()
|
||
|
|
*/
|
||
|
|
public void setComment(String comment) {
|
||
|
|
// BEGIN Android-added: Explicitly use UTF_8 instead of the default charset.
|
||
|
|
if (comment != null && comment.getBytes(StandardCharsets.UTF_8).length > 0xffff) {
|
||
|
|
throw new IllegalArgumentException(comment + " too long: " +
|
||
|
|
comment.getBytes(StandardCharsets.UTF_8).length);
|
||
|
|
}
|
||
|
|
// END Android-added: Explicitly use UTF_8 instead of the default charset.
|
||
|
|
|
||
|
|
this.comment = comment;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the comment string for the entry.
|
||
|
|
*
|
||
|
|
* @return the comment string for the entry, or null if none
|
||
|
|
*
|
||
|
|
* @see #setComment(String)
|
||
|
|
*/
|
||
|
|
public String getComment() {
|
||
|
|
return comment;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns true if this is a directory entry. A directory entry is
|
||
|
|
* defined to be one whose name ends with a '/'.
|
||
|
|
* @return true if this is a directory entry
|
||
|
|
*/
|
||
|
|
public boolean isDirectory() {
|
||
|
|
return name.endsWith("/");
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns a string representation of the ZIP entry.
|
||
|
|
*/
|
||
|
|
public String toString() {
|
||
|
|
return getName();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the hash code value for this entry.
|
||
|
|
*/
|
||
|
|
public int hashCode() {
|
||
|
|
return name.hashCode();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns a copy of this entry.
|
||
|
|
*/
|
||
|
|
public Object clone() {
|
||
|
|
try {
|
||
|
|
ZipEntry e = (ZipEntry)super.clone();
|
||
|
|
e.extra = (extra == null) ? null : extra.clone();
|
||
|
|
return e;
|
||
|
|
} catch (CloneNotSupportedException e) {
|
||
|
|
// This should never happen, since we are Cloneable
|
||
|
|
throw new InternalError(e);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|