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[fbreader] Handle slightly broken zip files

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Only DEFLATED entries can have EXT descriptor, ignore this flag
for STORED entries.
This commit is contained in:
Slava Monich 2015-08-21 13:42:45 +03:00
parent 36a1bcad0c
commit ba402d79ff
2 changed files with 9 additions and 1 deletions
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4
fbreader/fbreader/zlibrary/core/src/filesystem/zip/ZLZipHeader.cpp
View file

@ -1,5 +1,6 @@
/*
* Copyright (C) 2004-2010 Geometer Plus <contact@geometerplus.com>
* Copyright (C) 2015 Slava Monich <slava.monich@jolla.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -63,7 +64,8 @@ void ZLZipHeader::skipEntry(ZLInputStream &stream, ZLZipHeader &header) {
default:
break;
case SignatureLocalFile:
if (header.Flags & 0x08) {
// Only DEFLATED entries can have EXT descriptor
if (header.CompressionMethod != ZLZipHeader::MethodStored && (header.Flags & 0x08)) {
stream.seek(header.ExtraLength, false);
ZLZDecompressor decompressor((size_t)-1);
size_t size;

6
fbreader/fbreader/zlibrary/core/src/filesystem/zip/ZLZipHeader.h
View file

@ -1,5 +1,6 @@
/*
* Copyright (C) 2004-2010 Geometer Plus <contact@geometerplus.com>
* Copyright (C) 2015 Slava Monich <slava.monich@jolla.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -26,6 +27,11 @@ struct ZLZipHeader {
static const unsigned long SignatureLocalFile;
static const unsigned long SignatureData;
enum {
MethodStored = 0,
MethodDeflated = 8
};
unsigned long Signature;
unsigned short Version;
unsigned short Flags;