ZipFile.hxx

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 *   except in compliance with the License. You may obtain a copy of
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#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"
 
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
{
    rtl::Reference<comphelper::RefCountedMutex> m_aMutexHolder;
 
    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,
            bool bDecrypt,
            const bool bUseBufferedStream = true,
            const OUString& aMediaType = OUString() );
 
    bool hasValidPassword ( ZipEntry const & rEntry, const rtl::Reference < EncryptionData > &rData );
 
    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 );
 
    void readLOC( ZipEntry &rEntry );
    sal_Int32 readCEN();
    sal_Int32 findEND();
    void recover();
    static void readExtraFields(MemoryByteGrabber& aMemGrabber, sal_Int16 nExtraLen,
                                sal_uInt64& nSize, sal_uInt64& nCompressedSize,
                                sal_uInt64* nOffset);
 
public:
 
    ZipFile( rtl::Reference<comphelper::RefCountedMutex> aMutexHolder,
             css::uno::Reference < css::io::XInputStream > const &xInput,
             css::uno::Reference < css::uno::XComponentContext > xContext,
             bool bInitialise );
 
    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 );
 
    ~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,
            bool bDecrypt,
            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,
            bool bDecrypt,
            const rtl::Reference<comphelper::RefCountedMutex>& aMutexHolder );
 
    css::uno::Reference< css::io::XInputStream > getDataStream(
            ZipEntry& rEntry,
            const ::rtl::Reference < EncryptionData > &rData,
            bool bDecrypt,
            const rtl::Reference<comphelper::RefCountedMutex>& aMutexHolder );
 
    css::uno::Reference< css::io::XInputStream > getWrappedRawStream(
            ZipEntry& rEntry,
            const ::rtl::Reference < EncryptionData > &rData,
            const OUString& aMediaType,
            const rtl::Reference<comphelper::RefCountedMutex>& aMutexHolder );
 
    ZipEnumeration entries();
};
 
#endif
 
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