archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-08-27 14:54:52 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

8246129: ZIP entries created for DOS epoch include local timezone metadata

Browse source 
Reviewed-by: lancea
This commit is contained in:
Claes Redestad 2020-06-10 20:53:04 +02:00
parent e47b2bc8c3
commit 99136026b8
3 changed files with 170 additions and 23 deletions
Download patch file Download diff file Expand all files Collapse all files

27
src/java.base/share/classes/java/util/zip/ZipUtils.java
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2013, 2019, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2013, 2020, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -131,14 +131,8 @@ class ZipUtils {
/**
* Converts Java time to DOS time.
*/
private static long javaToDosTime(long time) {
Instant instant = Instant.ofEpochMilli(time);
LocalDateTime ldt = LocalDateTime.ofInstant(
instant, ZoneId.systemDefault());
private static long javaToDosTime(LocalDateTime ldt) {
int year = ldt.getYear() - 1980;
if (year < 0) {
return (1 << 21) | (1 << 16);
}
return (year << 25 |
ldt.getMonthValue() << 21 |
ldt.getDayOfMonth() << 16 |
@ -154,14 +148,17 @@ class ZipUtils {
* @param time milliseconds since epoch
* @return DOS time with 2s remainder encoded into upper half
*/
public static long javaToExtendedDosTime(long time) {
if (time < 0) {
return ZipEntry.DOSTIME_BEFORE_1980;
static long javaToExtendedDosTime(long time) {
LocalDateTime ldt = javaEpochToLocalDateTime(time);
if (ldt.getYear() >= 1980) {
return javaToDosTime(ldt) + ((time % 2000) << 32);
}
long dostime = javaToDosTime(time);
return (dostime != ZipEntry.DOSTIME_BEFORE_1980)
? dostime + ((time % 2000) << 32)
: ZipEntry.DOSTIME_BEFORE_1980;
return ZipEntry.DOSTIME_BEFORE_1980;
}
static LocalDateTime javaEpochToLocalDateTime(long time) {
Instant instant = Instant.ofEpochMilli(time);
return LocalDateTime.ofInstant(instant, ZoneId.systemDefault());
}
/**