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Limit ChronoField values to their range

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See gh-19595
This commit is contained in:
Dmytro Nosan
2020-01-09 14:03:40 +02:00
committed by Madhura Bhave
parent faa38c946f
commit 9bc68b9877
1 changed files with 18 additions and 6 deletions
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24
spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/jar/CentralDirectoryFileHeader.java
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@@ -1,5 +1,5 @@
/*
* Copyright 2012-2019 the original author or authors.
* Copyright 2012-2020 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -17,8 +17,11 @@
package org.springframework.boot.loader.jar;
import java.io.IOException;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.temporal.ChronoField;
import java.time.temporal.ChronoUnit;
import java.time.temporal.ValueRange;
import org.springframework.boot.loader.data.RandomAccessData;
@@ -124,10 +127,14 @@ final class CentralDirectoryFileHeader implements FileHeader {
* @return the date and time as milliseconds since the epoch
*/
private long decodeMsDosFormatDateTime(long datetime) {
LocalDateTime localDateTime = LocalDateTime.of((int) (((datetime >> 25) & 0x7f) + 1980),
(int) ((datetime >> 21) & 0x0f), (int) ((datetime >> 16) & 0x1f), (int) ((datetime >> 11) & 0x1f),
(int) ((datetime >> 5) & 0x3f), (int) ((datetime << 1) & 0x3e));
return localDateTime.toEpochSecond(ZoneId.systemDefault().getRules().getOffset(localDateTime)) * 1000;
int year = getChronoValue(((datetime >> 25) & 0x7f) + 1980, ChronoField.YEAR);
int month = getChronoValue((datetime >> 21) & 0x0f, ChronoField.MONTH_OF_YEAR);
int day = getChronoValue((datetime >> 16) & 0x1f, ChronoField.DAY_OF_MONTH);
int hour = getChronoValue((datetime >> 11) & 0x1f, ChronoField.HOUR_OF_DAY);
int minute = getChronoValue((datetime >> 5) & 0x3f, ChronoField.MINUTE_OF_HOUR);
int second = getChronoValue((datetime << 1) & 0x3e, ChronoField.SECOND_OF_MINUTE);
return ZonedDateTime.of(year, month, day, hour, minute, second, 0, ZoneId.systemDefault()).toInstant()
.truncatedTo(ChronoUnit.SECONDS).toEpochMilli();
}
public long getCrc() {
@@ -172,4 +179,9 @@ final class CentralDirectoryFileHeader implements FileHeader {
return fileHeader;
}
private static int getChronoValue(long value, ChronoField field) {
ValueRange range = field.range();
return Math.toIntExact(Math.min(Math.max(value, range.getMinimum()), range.getMaximum()));
}
}