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path: root/package/source/zippackage/ZipPackageStream.cxx
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/*************************************************************************
 *
 *  $RCSfile: ZipPackageStream.cxx,v $
 *
 *  $Revision: 1.35 $
 *
 *  last change: $Author: hr $ $Date: 2004-02-02 19:21:54 $
 *
 *  The Contents of this file are made available subject to the terms of
 *  either of the following licenses
 *
 *         - GNU Lesser General Public License Version 2.1
 *         - Sun Industry Standards Source License Version 1.1
 *
 *  Sun Microsystems Inc., October, 2000
 *
 *  GNU Lesser General Public License Version 2.1
 *  =============================================
 *  Copyright 2000 by Sun Microsystems, Inc.
 *  901 San Antonio Road, Palo Alto, CA 94303, USA
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License version 2.1, as published by the Free Software Foundation.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *  MA  02111-1307  USA
 *
 *
 *  Sun Industry Standards Source License Version 1.1
 *  =================================================
 *  The contents of this file are subject to the Sun Industry Standards
 *  Source License Version 1.1 (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.openoffice.org/license.html.
 *
 *  Software provided under this License is provided on an "AS IS" basis,
 *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
 *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
 *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
 *  See the License for the specific provisions governing your rights and
 *  obligations concerning the Software.
 *
 *  The Initial Developer of the Original Code is: Sun Microsystems, Inc.
 *
 *  Copyright: 2000 by Sun Microsystems, Inc.
 *
 *  All Rights Reserved.
 *
 *  Contributor(s): Martin Gallwey (gallwey@sun.com)
 *
 *
 ************************************************************************/

#ifndef _COM_SUN_STAR_PACKAGES_ZIP_ZIPCONSTANTS_HPP_
#include <com/sun/star/packages/zip/ZipConstants.hpp>
#endif

#ifndef _COM_SUN_STAR_PACKAGES_ZIP_ZIPIOEXCEPTION_HPP_
#include <com/sun/star/packages/zip/ZipIOException.hpp>
#endif

#ifndef _COM_SUN_STAR_IO_XSEEKABLE_HPP_
#include <com/sun/star/io/XSeekable.hpp>
#endif


#ifndef _ZIP_PACKAGE_STREAM_HXX
#include <ZipPackageStream.hxx>
#endif
#ifndef _ZIP_PACKAGE_HXX
#include <ZipPackage.hxx>
#endif
#ifndef _ZIP_FILE_HXX
#include <ZipFile.hxx>
#endif
#ifndef _ENCRYPTED_DATA_HEADER_HXX_
#include <EncryptedDataHeader.hxx>
#endif

#ifndef _VOS_DIAGNOSE_H_
#include <vos/diagnose.hxx>
#endif

using namespace com::sun::star::packages::zip::ZipConstants;
using namespace com::sun::star::packages::zip;
using namespace com::sun::star::uno;
using namespace com::sun::star::lang;
using namespace com::sun::star;
using namespace cppu;
using namespace rtl;

Sequence < sal_Int8 > ZipPackageStream::aImplementationId = Sequence < sal_Int8 > ();

ZipPackageStream::ZipPackageStream (ZipPackage & rNewPackage )
: rZipPackage(rNewPackage)
, bToBeCompressed ( sal_True )
, bToBeEncrypted ( sal_False )
, bIsEncrypted ( sal_False )
, bHaveOwnKey ( sal_False )
, xEncryptionData ( )
, m_nStreamMode( PACKAGE_STREAM_NOTSET )
, m_nMagicalHackSize( 0 )
, m_nMagicalHackPos( 0 )
{
    SetFolder ( sal_False );
    aEntry.nVersion     = -1;
    aEntry.nFlag        = 0;
    aEntry.nMethod      = -1;
    aEntry.nTime        = -1;
    aEntry.nCrc         = -1;
    aEntry.nCompressedSize  = -1;
    aEntry.nSize        = -1;
    aEntry.nOffset      = -1;
    aEntry.nNameLen     = -1;
    aEntry.nExtraLen    = -1;

    if ( !aImplementationId.getLength() )
        {
            aImplementationId = getImplementationId();
        }
}

ZipPackageStream::~ZipPackageStream( void )
{
}

void ZipPackageStream::setZipEntry( const ZipEntry &rInEntry)
{
    aEntry.nVersion = rInEntry.nVersion;
    aEntry.nFlag = rInEntry.nFlag;
    aEntry.nMethod = rInEntry.nMethod;
    aEntry.nTime = rInEntry.nTime;
    aEntry.nCrc = rInEntry.nCrc;
    aEntry.nCompressedSize = rInEntry.nCompressedSize;
    aEntry.nSize = rInEntry.nSize;
    aEntry.nOffset = rInEntry.nOffset;
    aEntry.sName = rInEntry.sName;
    aEntry.nNameLen = rInEntry.nNameLen;
    aEntry.nExtraLen = rInEntry.nExtraLen;
}

sal_Bool ZipPackageStream::ParsePackageRawStream()
{
    OSL_ENSURE( xStream.is(), "A stream must be provided!\n" );

    if ( !xStream.is() )
        return sal_False;

    sal_Bool bOk = sal_False;

    vos::ORef < EncryptionData > xTempEncrData;
    sal_Int32 nMagHackSize = 0;
    Sequence < sal_Int8 > aHeader ( 4 );

    if ( xStream->readBytes ( aHeader, 4 ) == 4 )
    {
        const sal_Int8 *pHeader = aHeader.getConstArray();
        sal_uInt32 nHeader = ( pHeader [0] & 0xFF )       |
                             ( pHeader [1] & 0xFF ) << 8  |
                             ( pHeader [2] & 0xFF ) << 16 |
                             ( pHeader [3] & 0xFF ) << 24;
        if ( nHeader == n_ConstHeader )
        {
            // this is one of our god-awful, but extremely devious hacks, everyone cheer
            xTempEncrData = new EncryptionData;

            ::rtl::OUString aMediaType;
            if ( ZipFile::StaticFillData ( xTempEncrData, nMagHackSize, aMediaType, xStream ) )
            {
                // We'll want to skip the data we've just read, so calculate how much we just read
                // and remember it
                m_nMagicalHackPos = n_ConstHeaderSize + xTempEncrData->aSalt.getLength()
                                                    + xTempEncrData->aInitVector.getLength()
                                                    + xTempEncrData->aDigest.getLength()
                                                    + aMediaType.getLength() * sizeof( sal_Unicode );
                m_nMagicalHackSize = nMagHackSize;
                sMediaType = aMediaType;

                bOk = sal_True;
            }
        }
    }

    if ( !bOk )
    {
        // the provided stream is not a raw stream
        return sal_False;
    }

    xEncryptionData = xTempEncrData;
    SetIsEncrypted ( sal_True );
    // it's already compressed and encrypted
    bToBeEncrypted = bToBeCompressed = sal_False;

    return sal_True;
}

void ZipPackageStream::SetPackageMember( sal_Bool bNewValue )
{
    if ( bNewValue )
    {
        m_nStreamMode = PACKAGE_STREAM_PACKAGEMEMBER;
        m_nMagicalHackPos = 0;
        m_nMagicalHackSize = 0;
    }
    else if ( m_nStreamMode == PACKAGE_STREAM_PACKAGEMEMBER )
        m_nStreamMode = PACKAGE_STREAM_NOTSET; // must be reset
}

// XActiveDataSink
void SAL_CALL ZipPackageStream::setInputStream( const Reference< io::XInputStream >& aStream )
        throw(RuntimeException)
{
    // TODO: wrap the stream in case it is not seekable
    // The package component requires that every stream either be FROM a package or it must support XSeekable!
    Reference< io::XSeekable > xSeek( aStream, UNO_QUERY );
    if ( !xSeek.is() )
        throw RuntimeException( OUString::createFromAscii( "The stream must support XSeekable!" ),
                                Reference< XInterface >() );

    xStream = aStream;
    SetPackageMember ( sal_False );
    aEntry.nTime = -1;
    m_nStreamMode = PACKAGE_STREAM_DETECT;
}

Reference< io::XInputStream > SAL_CALL ZipPackageStream::getRawData()
        throw(RuntimeException)
{
    if (IsPackageMember())
    {
        try
        {
            if ( !xEncryptionData.isEmpty() && !bHaveOwnKey )
                xEncryptionData->aKey = rZipPackage.getEncryptionKey();
            return rZipPackage.getZipFile().getRawData( aEntry, xEncryptionData, bIsEncrypted );
        }
        catch (ZipException &)//rException)
        {
            VOS_ENSURE( 0, "ZipException thrown");//rException.Message);
            return Reference < io::XInputStream > ();
        }
    }
    else
        return xStream;
}

Reference< io::XInputStream > SAL_CALL ZipPackageStream::getInputStream(  )
        throw(RuntimeException)
{
    if (IsPackageMember())
    {
        try
        {
            if ( !xEncryptionData.isEmpty() && !bHaveOwnKey )
                xEncryptionData->aKey = rZipPackage.getEncryptionKey();
            return rZipPackage.getZipFile().getInputStream( aEntry, xEncryptionData, bIsEncrypted );
        }
        catch (ZipException &)//rException)
        {
            VOS_ENSURE( 0,"ZipException thrown");//rException.Message);
            return Reference < io::XInputStream > ();
        }
    }
    else
        return xStream;
}

// XDataSinkEncrSupport
//--------------------------------------------------------------------------
Reference< io::XInputStream > SAL_CALL ZipPackageStream::getDataStream()
        throw ( packages::WrongPasswordException,
                io::IOException,
                RuntimeException )
{
    // There is no stream attached to this object
    if ( m_nStreamMode == PACKAGE_STREAM_NOTSET )
        return Reference< io::XInputStream >();

    // this method can not be used together with old approach
    if ( m_nStreamMode == PACKAGE_STREAM_DETECT )
        throw packages::zip::ZipIOException(); // TODO

    if ( !xEncryptionData.isEmpty() && !bHaveOwnKey )
        xEncryptionData->aKey = rZipPackage.getEncryptionKey();

    if (IsPackageMember())
        return rZipPackage.getZipFile().getDataStream( aEntry, xEncryptionData, bIsEncrypted );
    else if ( m_nStreamMode == PACKAGE_STREAM_RAW )
        return ZipFile::StaticGetDataFromRawStream( xStream, xEncryptionData );
    else
    {
        Reference< io::XSeekable > xSeek( xStream, UNO_QUERY );
        if ( !xSeek.is() )
            throw RuntimeException( OUString::createFromAscii( "The stream must support XSeekable!" ),
                                    Reference< XInterface >() );

        xSeek->seek( 0 );
        return xStream;
    }
}

//--------------------------------------------------------------------------
Reference< io::XInputStream > SAL_CALL ZipPackageStream::getRawStream()
        throw ( packages::NoEncryptionException,
                io::IOException,
                uno::RuntimeException )
{
    // There is no stream attached to this object
    if ( m_nStreamMode == PACKAGE_STREAM_NOTSET )
        return Reference< io::XInputStream >();

    // this method can not be used together with old approach
    if ( m_nStreamMode == PACKAGE_STREAM_DETECT )
        throw packages::zip::ZipIOException(); // TODO

    if (IsPackageMember())
    {
        if ( !bIsEncrypted || xEncryptionData.isEmpty() )
            throw packages::NoEncryptionException(); // TODO

        return rZipPackage.getZipFile().getWrappedRawStream( aEntry, xEncryptionData, sMediaType );
    }
    else if ( m_nStreamMode == PACKAGE_STREAM_RAW )
        return xStream;
    else
        throw packages::NoEncryptionException(); // TODO
}

//--------------------------------------------------------------------------
void SAL_CALL ZipPackageStream::setDataStream( const Reference< io::XInputStream >& aStream )
        throw ( io::IOException,
                RuntimeException )
{
    setInputStream( aStream );
    m_nStreamMode = PACKAGE_STREAM_DATA;
}

//--------------------------------------------------------------------------
void SAL_CALL ZipPackageStream::setRawStream( const Reference< io::XInputStream >& aStream )
        throw ( packages::EncryptionNotAllowedException,
                packages::NoRawFormatException,
                io::IOException,
                RuntimeException)
{
    // TODO: wrap the stream in case it is not seekable
    // The package component requires that every stream either be FROM a package or it must support XSeekable!
    Reference< io::XSeekable > xSeek( aStream, UNO_QUERY );
    if ( !xSeek.is() )
        throw RuntimeException( OUString::createFromAscii( "The stream must support XSeekable!" ),
                                Reference< XInterface >() );

    xSeek->seek( 0 );
    Reference< io::XInputStream > xOldStream = xStream;
    xStream = aStream;
    if ( !ParsePackageRawStream() )
    {
        xStream = xOldStream;
        throw packages::NoRawFormatException();
    }

    SetPackageMember ( sal_False );
    aEntry.nTime = -1;
    m_nStreamMode = PACKAGE_STREAM_RAW;
}


// XUnoTunnel

sal_Int64 SAL_CALL ZipPackageStream::getSomething( const Sequence< sal_Int8 >& aIdentifier )
    throw(RuntimeException)
{
    sal_Int64 nMe = 0;
    if ( aIdentifier.getLength() == 16 &&
         0 == rtl_compareMemory( static_getImplementationId().getConstArray(), aIdentifier.getConstArray(), 16 ) )
        nMe = reinterpret_cast < sal_Int64 > ( this );
    return nMe;
}

// XPropertySet
void SAL_CALL ZipPackageStream::setPropertyValue( const OUString& aPropertyName, const Any& aValue )
        throw(beans::UnknownPropertyException, beans::PropertyVetoException, IllegalArgumentException, WrappedTargetException, RuntimeException)
{
    if (aPropertyName.equalsAsciiL(RTL_CONSTASCII_STRINGPARAM("MediaType")))
    {
        if ( aValue >>= sMediaType )
        {
            if (sMediaType.getLength() > 0)
            {
                if ( sMediaType.indexOf (OUString( RTL_CONSTASCII_USTRINGPARAM ( "text" ) ) ) != -1
                 || sMediaType.equals( OUString( RTL_CONSTASCII_USTRINGPARAM ( "application/vnd.sun.star.oleobject" ) ) ) )
                    bToBeCompressed = sal_True;
                else
                    bToBeCompressed = sal_False;
            }
        }
        else
            throw IllegalArgumentException( OUString::createFromAscii( "MediaType must be a string!\n" ),
                                            Reference< XInterface >(),
                                            2 );

    }
    else if (aPropertyName.equalsAsciiL(RTL_CONSTASCII_STRINGPARAM("Size") ) )
    {
        if ( !( aValue >>= aEntry.nSize ) )
            throw IllegalArgumentException( OUString::createFromAscii( "Wrong type for Size property!\n" ),
                                            Reference< XInterface >(),
                                            2 );
    }
    else if (aPropertyName.equalsAsciiL(RTL_CONSTASCII_STRINGPARAM("Encrypted") ) )
    {
        sal_Bool bEnc = sal_False;
        if ( aValue >>= bEnc )
        {
            // In case of new raw stream, the stream must not be encrypted on storing
            if ( bEnc && m_nStreamMode == PACKAGE_STREAM_RAW )
                throw IllegalArgumentException( OUString::createFromAscii( "Raw stream can not be encrypted on storing" ),
                                                Reference< XInterface >(),
                                                2 );

            bToBeEncrypted = bEnc;
            if ( bToBeEncrypted && xEncryptionData.isEmpty())
                xEncryptionData = new EncryptionData;
        }
        else
            throw IllegalArgumentException( OUString::createFromAscii( "Wrong type for Encrypted property!\n" ),
                                            Reference< XInterface >(),
                                            2 );

    }
    else if (aPropertyName.equalsAsciiL(RTL_CONSTASCII_STRINGPARAM("EncryptionKey") ) )
    {
        Sequence < sal_Int8 > aNewKey;

        if ( !( aValue >>= aNewKey ) )
        {
            OUString sTempString;
            if ( ( aValue >>= sTempString ) )
            {
                sal_Int32 nNameLength = sTempString.getLength();
                Sequence < sal_Int8 > aSequence ( nNameLength );
                sal_Int8 *pArray = aSequence.getArray();
                const sal_Unicode *pChar = sTempString.getStr();
                for ( sal_Int16 i = 0; i < nNameLength; i++)
                    pArray[i] = static_cast < const sal_Int8 > (pChar[i]);
                aNewKey = aSequence;
            }
            else
                throw IllegalArgumentException( OUString::createFromAscii( "Wrong type for EncryptionKey property!\n" ),
                                                Reference< XInterface >(),
                                                2 );
        }

        if ( aNewKey.getLength() )
        {
            if ( xEncryptionData.isEmpty())
                xEncryptionData = new EncryptionData;

            xEncryptionData->aKey = aNewKey;
            // In case of new raw stream, the stream must not be encrypted on storing
            bHaveOwnKey = sal_True;
            if ( m_nStreamMode != PACKAGE_STREAM_RAW )
                bToBeEncrypted = sal_True;
        }
        else
            bHaveOwnKey = sal_False;
    }
#if SUPD>617
    else if (aPropertyName.equalsAsciiL ( RTL_CONSTASCII_STRINGPARAM ( "Compressed" ) ) )
#else
    else if (aPropertyName.equalsAsciiL ( RTL_CONSTASCII_STRINGPARAM ( "Compress" ) ) )
#endif
    {
        sal_Bool bCompr = sal_False;

        if ( aValue >>= bCompr )
        {
            // In case of new raw stream, the stream must not be encrypted on storing
            if ( bCompr && m_nStreamMode == PACKAGE_STREAM_RAW )
                throw IllegalArgumentException( OUString::createFromAscii( "Raw stream can not be encrypted on storing" ),
                                                Reference< XInterface >(),
                                                2 );

            bToBeCompressed = bCompr;
        }
        else
            throw IllegalArgumentException( OUString::createFromAscii( "Wrong type for Compressed property!\n" ),
                                            Reference< XInterface >(),
                                            2 );
    }
    else
        throw beans::UnknownPropertyException();
}

Any SAL_CALL ZipPackageStream::getPropertyValue( const OUString& PropertyName )
        throw(beans::UnknownPropertyException, WrappedTargetException, RuntimeException)
{
    Any aAny;
    if (PropertyName.equalsAsciiL( RTL_CONSTASCII_STRINGPARAM( "MediaType" ) ) )
    {
        aAny <<= sMediaType;
        return aAny;
    }
    else if (PropertyName.equalsAsciiL( RTL_CONSTASCII_STRINGPARAM ( "Size" ) ) )
    {
        aAny <<= aEntry.nSize;
        return aAny;
    }
    else if (PropertyName.equalsAsciiL( RTL_CONSTASCII_STRINGPARAM ( "Encrypted" ) ) )
    {
        aAny <<= ( m_nStreamMode == PACKAGE_STREAM_RAW ) ? sal_True : bToBeEncrypted;
        return aAny;
    }
    else if (PropertyName.equalsAsciiL( RTL_CONSTASCII_STRINGPARAM ( "Compressed" ) ) )
    {
        aAny <<= bToBeCompressed;
        return aAny;
    }
    else if (PropertyName.equalsAsciiL( RTL_CONSTASCII_STRINGPARAM( "EncryptionKey" ) ) )
    {
        aAny <<= xEncryptionData.isEmpty () ? Sequence < sal_Int8 > () : xEncryptionData->aKey;
        return aAny;
    }
    else
        throw beans::UnknownPropertyException();
}

void ZipPackageStream::setSize (const sal_Int32 nNewSize)
{
    if (aEntry.nCompressedSize != nNewSize )
        aEntry.nMethod = DEFLATED;
    aEntry.nSize = nNewSize;
}
OUString ZipPackageStream::getImplementationName()
    throw (RuntimeException)
{
    return OUString ( RTL_CONSTASCII_USTRINGPARAM ( "ZipPackageStream" ) );
}

Sequence< OUString > ZipPackageStream::getSupportedServiceNames()
    throw (RuntimeException)
{
    Sequence< OUString > aNames(1);
    aNames[0] = OUString( RTL_CONSTASCII_USTRINGPARAM ( "com.sun.star.packages.PackageStream" ) );
    return aNames;
}
sal_Bool SAL_CALL ZipPackageStream::supportsService( OUString const & rServiceName )
    throw (RuntimeException)
{
    return rServiceName == getSupportedServiceNames()[0];
}