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8226530: ZipFile reads wrong entry size from ZIP64 entries

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Reviewed-by: bpb, clanger, shade
This commit is contained in:
Lance Andersen 2019-08-07 14:04:10 -04:00
parent 2b164a34ad
commit 5233e25c4c
4 changed files with 180 additions and 16 deletions
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41
src/java.base/share/classes/java/util/zip/ZipEntry.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 1995, 2017, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1995, 2019, 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
@ -522,7 +522,7 @@ class ZipEntry implements ZipConstants, Cloneable {
* @see #getExtra()
*/
public void setExtra(byte[] extra) {
setExtra0(extra, false);
setExtra0(extra, false, true);
}
/**
@ -532,8 +532,11 @@ class ZipEntry implements ZipConstants, Cloneable {
* 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) {
void setExtra0(byte[] extra, boolean doZIP64, boolean isLOC) {
if (extra != null) {
if (extra.length > 0xFFFF) {
throw new IllegalArgumentException("invalid extra field length");
@ -550,15 +553,29 @@ class ZipEntry implements ZipConstants, Cloneable {
switch (tag) {
case EXTID_ZIP64:
if (doZIP64) {
// 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);
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;