Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 323 insertions, 0 deletions

diff --git a/package/source/zipapi/XUnbufferedStream.cxx b/package/source/zipapi/XUnbufferedStream.cxx
new file mode 100644
index 000000000..56f864a2d
--- /dev/null
+++ b/package/source/zipapi/XUnbufferedStream.cxx
@@ -0,0 +1,323 @@
+/* -*- 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 .
+ */
+
+#include <com/sun/star/packages/zip/ZipConstants.hpp>
+#include <com/sun/star/packages/zip/ZipIOException.hpp>
+#include <com/sun/star/xml/crypto/CipherID.hpp>
+
+#include "XUnbufferedStream.hxx"
+#include <EncryptionData.hxx>
+#include <ZipFile.hxx>
+#include <EncryptedDataHeader.hxx>
+#include <algorithm>
+#include <string.h>
+
+#include <osl/diagnose.h>
+#include <osl/mutex.hxx>
+#include <tools/diagnose_ex.h>
+
+using namespace ::com::sun::star;
+using namespace com::sun::star::packages::zip::ZipConstants;
+using namespace com::sun::star::io;
+using namespace com::sun::star::uno;
+using com::sun::star::packages::zip::ZipIOException;
+
+XUnbufferedStream::XUnbufferedStream(
+                      const uno::Reference< uno::XComponentContext >& xContext,
+                      const rtl::Reference< comphelper::RefCountedMutex >& aMutexHolder,
+                      ZipEntry const & rEntry,
+                      Reference < XInputStream > const & xNewZipStream,
+                      const ::rtl::Reference< EncryptionData >& rData,
+                      sal_Int8 nStreamMode,
+                      bool bIsEncrypted,
+                      const OUString& aMediaType,
+                      bool bRecoveryMode )
+: maMutexHolder( aMutexHolder )
+, mxZipStream ( xNewZipStream )
+, mxZipSeek ( xNewZipStream, UNO_QUERY )
+, maEntry ( rEntry )
+, mnBlockSize( 1 )
+, maInflater ( true )
+, mbRawStream ( nStreamMode == UNBUFF_STREAM_RAW || nStreamMode == UNBUFF_STREAM_WRAPPEDRAW )
+, mbWrappedRaw ( nStreamMode == UNBUFF_STREAM_WRAPPEDRAW )
+, mnHeaderToRead ( 0 )
+, mnZipCurrent ( 0 )
+, mnZipEnd ( 0 )
+, mnZipSize ( 0 )
+, mnMyCurrent ( 0 )
+, mbCheckCRC(!bRecoveryMode)
+{
+    mnZipCurrent = maEntry.nOffset;
+    if ( mbRawStream )
+    {
+        mnZipSize = maEntry.nMethod == DEFLATED ? maEntry.nCompressedSize : maEntry.nSize;
+        mnZipEnd = maEntry.nOffset + mnZipSize;
+    }
+    else
+    {
+        mnZipSize = maEntry.nSize;
+        mnZipEnd = maEntry.nMethod == DEFLATED ? maEntry.nOffset + maEntry.nCompressedSize : maEntry.nOffset + maEntry.nSize;
+    }
+
+    if (mnZipSize < 0)
+        throw ZipIOException("The stream seems to be broken!");
+
+    bool bHaveEncryptData = rData.is() && rData->m_aInitVector.hasElements() &&
+        ((rData->m_aSalt.hasElements() && rData->m_nIterationCount != 0)
+         ||
+         rData->m_aKey.hasElements());
+    bool bMustDecrypt = nStreamMode == UNBUFF_STREAM_DATA && bHaveEncryptData && bIsEncrypted;
+
+    if ( bMustDecrypt )
+    {
+        m_xCipherContext = ZipFile::StaticGetCipher( xContext, rData, false );
+        mnBlockSize = ( rData->m_nEncAlg == xml::crypto::CipherID::AES_CBC_W3C_PADDING ? 16 : 1 );
+    }
+
+    if ( !(bHaveEncryptData && mbWrappedRaw && bIsEncrypted) )
+        return;
+
+    // if we have the data needed to decrypt it, but didn't want it decrypted (or
+    // we couldn't decrypt it due to wrong password), then we prepend this
+    // data to the stream
+
+    // Make a buffer big enough to hold both the header and the data itself
+    maHeader.realloc  ( n_ConstHeaderSize +
+                        rData->m_aInitVector.getLength() +
+                        rData->m_aSalt.getLength() +
+                        rData->m_aDigest.getLength() +
+                        aMediaType.getLength() * sizeof( sal_Unicode ) );
+    sal_Int8 * pHeader = maHeader.getArray();
+    ZipFile::StaticFillHeader( rData, rEntry.nSize, aMediaType, pHeader );
+    mnHeaderToRead = static_cast < sal_Int16 > ( maHeader.getLength() );
+    mnZipSize += mnHeaderToRead;
+}
+
+// allows to read package raw stream
+XUnbufferedStream::XUnbufferedStream(
+                    const rtl::Reference< comphelper::RefCountedMutex >& aMutexHolder,
+                    const Reference < XInputStream >& xRawStream,
+                    const ::rtl::Reference< EncryptionData >& rData )
+: maMutexHolder( aMutexHolder )
+, mxZipStream ( xRawStream )
+, mxZipSeek ( xRawStream, UNO_QUERY )
+, mnBlockSize( 1 )
+, maInflater ( true )
+, mbRawStream ( false )
+, mbWrappedRaw ( false )
+, mnHeaderToRead ( 0 )
+, mnZipCurrent ( 0 )
+, mnZipEnd ( 0 )
+, mnZipSize ( 0 )
+, mnMyCurrent ( 0 )
+, mbCheckCRC( false )
+{
+    // for this scenario maEntry is not set !!!
+    OSL_ENSURE( mxZipSeek.is(), "The stream must be seekable!" );
+
+    // skip raw header, it must be already parsed to rData
+    mnZipCurrent = n_ConstHeaderSize + rData->m_aInitVector.getLength() +
+                            rData->m_aSalt.getLength() + rData->m_aDigest.getLength();
+
+    try {
+        if ( mxZipSeek.is() )
+            mnZipSize = mxZipSeek->getLength();
+    } catch( const Exception& )
+    {
+        // in case of problem the size will stay set to 0
+        TOOLS_WARN_EXCEPTION("package", "ignoring");
+    }
+
+    mnZipEnd = mnZipCurrent + mnZipSize;
+
+    // the raw data will not be decrypted, no need for the cipher
+    // m_xCipherContext = ZipFile::StaticGetCipher( xContext, rData, false );
+}
+
+XUnbufferedStream::~XUnbufferedStream()
+{
+}
+
+sal_Int32 SAL_CALL XUnbufferedStream::readBytes( Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )
+{
+    ::osl::MutexGuard aGuard( maMutexHolder->GetMutex() );
+
+    sal_Int32 nRequestedBytes = nBytesToRead;
+    OSL_ENSURE( !mnHeaderToRead || mbWrappedRaw, "Only encrypted raw stream can be provided with header!" );
+    if ( mnMyCurrent + nRequestedBytes > mnZipSize + maHeader.getLength() )
+        nRequestedBytes = static_cast < sal_Int32 > ( mnZipSize + maHeader.getLength() - mnMyCurrent );
+
+    sal_Int32 nTotal = 0;
+    aData.realloc ( nRequestedBytes );
+    if ( nRequestedBytes )
+    {
+        sal_Int32 nRead = 0;
+        sal_Int32 nLastRead = 0;
+        if ( mbRawStream )
+        {
+            sal_Int64 nDiff = mnZipEnd - mnZipCurrent;
+
+            if ( mbWrappedRaw && mnHeaderToRead )
+            {
+                sal_Int16 nHeadRead = static_cast< sal_Int16 >(( nRequestedBytes > mnHeaderToRead ?
+                                                                                 mnHeaderToRead : nRequestedBytes ));
+                memcpy ( aData.getArray(), maHeader.getConstArray() + maHeader.getLength() - mnHeaderToRead, nHeadRead );
+                mnHeaderToRead = mnHeaderToRead - nHeadRead;
+
+                if ( nHeadRead < nRequestedBytes )
+                {
+                    sal_Int32 nToRead = nRequestedBytes - nHeadRead;
+                    nToRead = ( nDiff < nToRead ) ? sal::static_int_cast< sal_Int32 >( nDiff ) : nToRead;
+
+                    Sequence< sal_Int8 > aPureData( nToRead );
+                    mxZipSeek->seek ( mnZipCurrent );
+                    nRead = mxZipStream->readBytes ( aPureData, nToRead );
+                    mnZipCurrent += nRead;
+
+                    aPureData.realloc( nRead );
+                    if ( mbCheckCRC )
+                        maCRC.update( aPureData );
+
+                    aData.realloc( nHeadRead + nRead );
+
+                    const sal_Int8* pPureBuffer = aPureData.getConstArray();
+                    sal_Int8* pBuffer = aData.getArray();
+                    for ( sal_Int32 nInd = 0; nInd < nRead; nInd++ )
+                        pBuffer[ nHeadRead + nInd ] = pPureBuffer[ nInd ];
+                }
+
+                nRead += nHeadRead;
+            }
+            else
+            {
+                mxZipSeek->seek ( mnZipCurrent );
+
+                nRead = mxZipStream->readBytes (
+                                        aData,
+                                        std::min<sal_Int64>(nDiff, nRequestedBytes) );
+
+                mnZipCurrent += nRead;
+
+                aData.realloc( nRead );
+                if ( mbWrappedRaw && mbCheckCRC )
+                    maCRC.update( aData );
+            }
+        }
+        else
+        {
+            for (;;)
+            {
+                nLastRead = maInflater.doInflateSegment( aData, nRead, aData.getLength() - nRead );
+                if ( 0 != nLastRead && ( nRead + nLastRead == nRequestedBytes || mnZipCurrent >= mnZipEnd ) )
+                    break;
+                nRead += nLastRead;
+                if ( nRead > nRequestedBytes )
+                    throw RuntimeException(
+                        "Should not be possible to read more than requested!" );
+
+                if ( maInflater.finished() || maInflater.getLastInflateError() )
+                    throw ZipIOException("The stream seems to be broken!" );
+
+                if ( maInflater.needsDictionary() )
+                    throw ZipIOException("Dictionaries are not supported!" );
+
+                sal_Int32 nDiff = static_cast< sal_Int32 >( mnZipEnd - mnZipCurrent );
+                if ( nDiff <= 0 )
+                {
+                    throw ZipIOException("The stream seems to be broken!" );
+                }
+
+                mxZipSeek->seek ( mnZipCurrent );
+
+                sal_Int32 nToRead = std::max( nRequestedBytes, static_cast< sal_Int32 >( 8192 ) );
+                if ( mnBlockSize > 1 )
+                    nToRead = nToRead + mnBlockSize - nToRead % mnBlockSize;
+                nToRead = std::min( nDiff, nToRead );
+
+                sal_Int32 nZipRead = mxZipStream->readBytes( maCompBuffer, nToRead );
+                if ( nZipRead < nToRead )
+                    throw ZipIOException("No expected data!" );
+
+                mnZipCurrent += nZipRead;
+                // maCompBuffer now has the data, check if we need to decrypt
+                // before passing to the Inflater
+                if ( m_xCipherContext.is() )
+                {
+                    if ( mbCheckCRC )
+                        maCRC.update( maCompBuffer );
+
+                    maCompBuffer = m_xCipherContext->convertWithCipherContext( maCompBuffer );
+                    if ( mnZipCurrent == mnZipEnd )
+                    {
+                        uno::Sequence< sal_Int8 > aSuffix = m_xCipherContext->finalizeCipherContextAndDispose();
+                        if ( aSuffix.hasElements() )
+                        {
+                            sal_Int32 nOldLen = maCompBuffer.getLength();
+                            maCompBuffer.realloc( nOldLen + aSuffix.getLength() );
+                            memcpy( maCompBuffer.getArray() + nOldLen, aSuffix.getConstArray(), aSuffix.getLength() );
+                        }
+                    }
+                }
+                maInflater.setInput ( maCompBuffer );
+
+            }
+        }
+
+        mnMyCurrent += nRead + nLastRead;
+        nTotal = nRead + nLastRead;
+        if ( nTotal < nRequestedBytes)
+            aData.realloc ( nTotal );
+
+        if ( mbCheckCRC && ( !mbRawStream || mbWrappedRaw ) )
+        {
+            if ( !m_xCipherContext.is() && !mbWrappedRaw )
+                maCRC.update( aData );
+
+            if ( mnZipSize + maHeader.getLength() == mnMyCurrent && maCRC.getValue() != maEntry.nCrc )
+                throw ZipIOException("The stream seems to be broken!" );
+        }
+    }
+
+    return nTotal;
+}
+
+sal_Int32 SAL_CALL XUnbufferedStream::readSomeBytes( Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead )
+{
+    return readBytes ( aData, nMaxBytesToRead );
+}
+void SAL_CALL XUnbufferedStream::skipBytes( sal_Int32 nBytesToSkip )
+{
+    if ( nBytesToSkip )
+    {
+        Sequence < sal_Int8 > aSequence ( nBytesToSkip );
+        readBytes ( aSequence, nBytesToSkip );
+    }
+}
+
+sal_Int32 SAL_CALL XUnbufferedStream::available(  )
+{
+    //available size must include the prepended header in case of wrapped raw stream
+    return static_cast< sal_Int32 > ( std::min< sal_Int64 >( SAL_MAX_INT32, (mnZipSize + mnHeaderToRead - mnMyCurrent) ) );
+}
+
+void SAL_CALL XUnbufferedStream::closeInput(  )
+{
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */