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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef INCLUDED_PACKAGE_INC_ZIPFILE_HXX
#define INCLUDED_PACKAGE_INC_ZIPFILE_HXX
#include <com/sun/star/xml/crypto/XCipherContext.hpp>
#include <com/sun/star/xml/crypto/XDigestContext.hpp>
#include <comphelper/refcountedmutex.hxx>
#include <package/Inflater.hxx>
#include <rtl/ref.hxx>
#include "ByteGrabber.hxx"
#include "HashMaps.hxx"
#include "EncryptionData.hxx"
#include <optional>
#include <span>
#include <unordered_set>
class MemoryByteGrabber;
namespace com::sun::star {
namespace uno { class XComponentContext; }
namespace ucb { class XProgressHandler; }
}
namespace rtl
{
template < class T > class Reference;
}
/*
* We impose arbitrary but reasonable limit on ZIP files.
*/
#define ZIP_MAXNAMELEN 512
#define ZIP_MAXENTRIES (0x10000 - 2)
class ZipEnumeration;
class ZipFile
{
public:
enum class Checks { Default, CheckInsensitive, TryCheckInsensitive };
private:
rtl::Reference<comphelper::RefCountedMutex> m_aMutexHolder;
std::unordered_set<OUString> m_EntriesInsensitive;
Checks m_Checks;
EntryHash aEntries;
ByteGrabber aGrabber;
ZipUtils::Inflater aInflater;
css::uno::Reference < css::io::XInputStream > xStream;
const css::uno::Reference < css::uno::XComponentContext > m_xContext;
bool bRecoveryMode;
// aMediaType parameter is used only for raw stream header creation
css::uno::Reference < css::io::XInputStream > createStreamForZipEntry(
const rtl::Reference<comphelper::RefCountedMutex>& aMutexHolder,
ZipEntry const & rEntry,
const ::rtl::Reference < EncryptionData > &rData,
sal_Int8 nStreamMode,
::std::optional<sal_Int64> oDecryptedSize,
const bool bUseBufferedStream = true,
const OUString& aMediaType = OUString() );
css::uno::Reference<css::io::XInputStream> checkValidPassword(
ZipEntry const& rEntry, rtl::Reference<EncryptionData> const& rData,
sal_Int64 nDecryptedSize,
rtl::Reference<comphelper::RefCountedMutex> const& rMutexHolder);
bool checkSizeAndCRC( const ZipEntry& aEntry );
sal_Int32 getCRC( sal_Int64 nOffset, sal_Int64 nSize );
void getSizeAndCRC( sal_Int64 nOffset, sal_Int64 nCompressedSize, sal_Int64 *nSize, sal_Int32 *nCRC );
sal_uInt64 readLOC(ZipEntry &rEntry);
sal_uInt64 readLOC_Impl(ZipEntry &rEntry, std::vector<sal_Int8>& rNameBuffer, std::vector<sal_Int8>& rExtraBuffer);
sal_Int32 readCEN();
std::tuple<sal_Int64, sal_Int64, sal_Int64> findCentralDirectory();
void HandlePK34(std::span<const sal_Int8> data, sal_Int64 dataOffset, sal_Int64 totalSize);
void HandlePK78(std::span<const sal_Int8> data, sal_Int64 dataOffset);
void recover();
static bool readExtraFields(MemoryByteGrabber& aMemGrabber, sal_Int16 nExtraLen,
sal_uInt64& nSize, sal_uInt64& nCompressedSize,
::std::optional<sal_uInt64> & roOffset,
std::string_view const * pCENFilenameToCheck);
public:
ZipFile( rtl::Reference<comphelper::RefCountedMutex> aMutexHolder,
css::uno::Reference < css::io::XInputStream > const &xInput,
css::uno::Reference < css::uno::XComponentContext > xContext,
bool bInitialise,
bool bForceRecover,
Checks checks);
~ZipFile();
EntryHash& GetEntryHash() { return aEntries; }
void setInputStream ( const css::uno::Reference < css::io::XInputStream >& xNewStream );
css::uno::Reference< css::io::XInputStream > getRawData(
ZipEntry& rEntry,
const ::rtl::Reference < EncryptionData > &rData,
::std::optional<sal_Int64> oDecryptedSize,
const rtl::Reference<comphelper::RefCountedMutex>& aMutexHolder,
const bool bUseBufferedStream = true );
static css::uno::Reference< css::xml::crypto::XDigestContext > StaticGetDigestContextForChecksum(
const css::uno::Reference< css::uno::XComponentContext >& xArgContext,
const ::rtl::Reference< EncryptionData >& xEncryptionData );
static css::uno::Reference< css::xml::crypto::XCipherContext > StaticGetCipher(
const css::uno::Reference< css::uno::XComponentContext >& xArgContext,
const ::rtl::Reference< EncryptionData >& xEncryptionData,
bool bEncrypt );
static void StaticFillHeader ( const ::rtl::Reference < EncryptionData > & rData,
sal_Int64 nSize,
const OUString& aMediaType,
sal_Int8 * & pHeader );
static bool StaticFillData ( ::rtl::Reference < BaseEncryptionData > const & rData,
sal_Int32 &rEncAlgorithm,
sal_Int32 &rChecksumAlgorithm,
sal_Int32 &rDerivedKeySize,
sal_Int32 &rStartKeyGenID,
sal_Int32 &rSize,
OUString& aMediaType,
const css::uno::Reference < css::io::XInputStream >& rStream );
static css::uno::Reference< css::io::XInputStream > StaticGetDataFromRawStream(
const rtl::Reference<comphelper::RefCountedMutex>& aMutexHolder,
const css::uno::Reference< css::uno::XComponentContext >& rxContext,
const css::uno::Reference< css::io::XInputStream >& xStream,
const ::rtl::Reference < EncryptionData > &rData );
static bool StaticHasValidPassword (
const css::uno::Reference< css::uno::XComponentContext >& rxContext,
const css::uno::Sequence< sal_Int8 > &aReadBuffer,
const ::rtl::Reference < EncryptionData > &rData );
css::uno::Reference< css::io::XInputStream > getInputStream(
ZipEntry& rEntry,
const ::rtl::Reference < EncryptionData > &rData,
::std::optional<sal_Int64> oDecryptedSize,
const rtl::Reference<comphelper::RefCountedMutex>& aMutexHolder );
css::uno::Reference< css::io::XInputStream > getDataStream(
ZipEntry& rEntry,
const ::rtl::Reference < EncryptionData > &rData,
::std::optional<sal_Int64> oEncryptedSize,
const rtl::Reference<comphelper::RefCountedMutex>& aMutexHolder );
css::uno::Reference< css::io::XInputStream > getWrappedRawStream(
ZipEntry& rEntry,
const ::rtl::Reference < EncryptionData > &rData,
sal_Int64 nDecryptedSize,
const OUString& aMediaType,
const rtl::Reference<comphelper::RefCountedMutex>& aMutexHolder );
ZipEnumeration entries();
};
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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