diff options
Diffstat (limited to 'sdext/source/pdfimport/pdfparse')
| -rw-r--r-- | sdext/source/pdfimport/pdfparse/pdfentries.cxx | 1461 | ||||
| -rw-r--r-- | sdext/source/pdfimport/pdfparse/pdfparse.cxx | 701 |
2 files changed, 2162 insertions, 0 deletions
diff --git a/sdext/source/pdfimport/pdfparse/pdfentries.cxx b/sdext/source/pdfimport/pdfparse/pdfentries.cxx new file mode 100644 index 000000000..6fba80f70 --- /dev/null +++ b/sdext/source/pdfimport/pdfparse/pdfentries.cxx @@ -0,0 +1,1461 @@ +/* -*- 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 <pdfparse.hxx> + +#include <comphelper/hash.hxx> + +#include <rtl/strbuf.hxx> +#include <rtl/ustring.hxx> +#include <rtl/ustrbuf.hxx> +#include <rtl/digest.h> +#include <rtl/cipher.h> +#include <sal/log.hxx> + +#include <zlib.h> + +#include <math.h> +#include <map> + +#include <string.h> + + +namespace pdfparse +{ + +struct EmitImplData +{ + // xref table: maps object number to a pair of (generation, buffer offset) + typedef std::map< unsigned int, std::pair< unsigned int, unsigned int > > XRefTable; + XRefTable m_aXRefTable; + // container of all indirect objects (usually a PDFFile*) + const PDFContainer* m_pObjectContainer; + unsigned int m_nDecryptObject; + unsigned int m_nDecryptGeneration; + + // returns true if the xref table was updated + bool insertXref( unsigned int nObject, unsigned int nGeneration, unsigned int nOffset ) + { + XRefTable::iterator it = m_aXRefTable.find( nObject ); + if( it == m_aXRefTable.end() ) + { + // new entry + m_aXRefTable[ nObject ] = std::pair<unsigned int, unsigned int>(nGeneration,nOffset); + return true; + } + // update old entry, if generation number is higher + if( it->second.first < nGeneration ) + { + it->second = std::pair<unsigned int, unsigned int>(nGeneration,nOffset); + return true; + } + return false; + } + + explicit EmitImplData( const PDFContainer* pTopContainer ) : + m_pObjectContainer( pTopContainer ), + m_nDecryptObject( 0 ), + m_nDecryptGeneration( 0 ) + {} + void decrypt( const sal_uInt8* pInBuffer, sal_uInt32 nLen, sal_uInt8* pOutBuffer, + unsigned int nObject, unsigned int nGeneration ) const + { + const PDFFile* pFile = dynamic_cast<const PDFFile*>(m_pObjectContainer); + pFile && pFile->decrypt( pInBuffer, nLen, pOutBuffer, nObject, nGeneration ); + } + + void setDecryptObject( unsigned int nObject, unsigned int nGeneration ) + { + m_nDecryptObject = nObject; + m_nDecryptGeneration = nGeneration; + } +}; + +} + +using namespace pdfparse; + +EmitContext::EmitContext( const PDFContainer* pTop ) : + m_bDeflate( false ), + m_bDecrypt( false ) +{ + if( pTop ) + m_pImplData.reset( new EmitImplData( pTop ) ); +} + +EmitContext::~EmitContext() +{ +} + +PDFEntry::~PDFEntry() +{ +} + +EmitImplData* PDFEntry::getEmitData( EmitContext const & rContext ) +{ + return rContext.m_pImplData.get(); +} + +void PDFEntry::setEmitData( EmitContext& rContext, EmitImplData* pNewEmitData ) +{ + if( rContext.m_pImplData && rContext.m_pImplData.get() != pNewEmitData ) + rContext.m_pImplData.reset(); + rContext.m_pImplData.reset( pNewEmitData ); +} + +PDFValue::~PDFValue() +{ +} + +PDFComment::~PDFComment() +{ +} + +bool PDFComment::emit( EmitContext& rWriteContext ) const +{ + return rWriteContext.write( m_aComment.getStr(), m_aComment.getLength() ); +} + +PDFEntry* PDFComment::clone() const +{ + return new PDFComment( m_aComment ); +} + +PDFName::~PDFName() +{ +} + +bool PDFName::emit( EmitContext& rWriteContext ) const +{ + if( ! rWriteContext.write( " /", 2 ) ) + return false; + return rWriteContext.write( m_aName.getStr(), m_aName.getLength() ); +} + +PDFEntry* PDFName::clone() const +{ + return new PDFName( m_aName ); +} + +OUString PDFName::getFilteredName() const +{ + OStringBuffer aFilter( m_aName.getLength() ); + const char* pStr = m_aName.getStr(); + unsigned int nLen = m_aName.getLength(); + for( unsigned int i = 0; i < nLen; i++ ) + { + if( (i < nLen - 3) && pStr[i] == '#' ) + { + char rResult = 0; + i++; + if( pStr[i] >= '0' && pStr[i] <= '9' ) + rResult = char( pStr[i]-'0' ) << 4; + else if( pStr[i] >= 'a' && pStr[i] <= 'f' ) + rResult = char( pStr[i]-'a' + 10 ) << 4; + else if( pStr[i] >= 'A' && pStr[i] <= 'F' ) + rResult = char( pStr[i]-'A' + 10 ) << 4; + i++; + if( pStr[i] >= '0' && pStr[i] <= '9' ) + rResult |= char( pStr[i]-'0' ); + else if( pStr[i] >= 'a' && pStr[i] <= 'f' ) + rResult |= char( pStr[i]-'a' + 10 ); + else if( pStr[i] >= 'A' && pStr[i] <= 'F' ) + rResult |= char( pStr[i]-'A' + 10 ); + aFilter.append( rResult ); + } + else + aFilter.append( pStr[i] ); + } + return OStringToOUString( aFilter.makeStringAndClear(), RTL_TEXTENCODING_UTF8 ); +} + +PDFString::~PDFString() +{ +} + +bool PDFString::emit( EmitContext& rWriteContext ) const +{ + if( ! rWriteContext.write( " ", 1 ) ) + return false; + EmitImplData* pEData = getEmitData( rWriteContext ); + if( rWriteContext.m_bDecrypt && pEData && pEData->m_nDecryptObject ) + { + OString aFiltered( getFilteredString() ); + // decrypt inplace (evil since OString is supposed to be const + // however in this case we know that getFilteredString returned a singular string instance + pEData->decrypt( reinterpret_cast<sal_uInt8 const *>(aFiltered.getStr()), aFiltered.getLength(), + reinterpret_cast<sal_uInt8 *>(const_cast<char *>(aFiltered.getStr())), + pEData->m_nDecryptObject, pEData->m_nDecryptGeneration ); + // check for string or hex string + const char* pStr = aFiltered.getStr(); + if( aFiltered.getLength() > 1 && + ( (static_cast<unsigned char>(pStr[0]) == 0xff && static_cast<unsigned char>(pStr[1]) == 0xfe) || + (static_cast<unsigned char>(pStr[0]) == 0xfe && static_cast<unsigned char>(pStr[1]) == 0xff) ) ) + { + static const char pHexTab[16] = { '0', '1', '2', '3', '4', '5', '6', '7', + '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' }; + if( ! rWriteContext.write( "<", 1 ) ) + return false; + for( sal_Int32 i = 0; i < aFiltered.getLength(); i++ ) + { + if( ! rWriteContext.write( pHexTab + ((sal_uInt32(pStr[i]) >> 4) & 0x0f), 1 ) ) + return false; + if( ! rWriteContext.write( pHexTab + (sal_uInt32(pStr[i]) & 0x0f), 1 ) ) + return false; + } + if( ! rWriteContext.write( ">", 1 ) ) + return false; + } + else + { + if( ! rWriteContext.write( "(", 1 ) ) + return false; + if( ! rWriteContext.write( aFiltered.getStr(), aFiltered.getLength() ) ) + return false; + if( ! rWriteContext.write( ")", 1 ) ) + return false; + } + return true; + } + return rWriteContext.write( m_aString.getStr(), m_aString.getLength() ); +} + +PDFEntry* PDFString::clone() const +{ + return new PDFString( m_aString ); +} + +OString PDFString::getFilteredString() const +{ + int nLen = m_aString.getLength(); + OStringBuffer aBuf( nLen ); + + const char* pStr = m_aString.getStr(); + if( *pStr == '(' ) + { + const char* pRun = pStr+1; + while( pRun - pStr < nLen-1 ) + { + if( *pRun == '\\' ) + { + pRun++; + if( pRun - pStr < nLen ) + { + char aEsc = 0; + if( *pRun == 'n' ) + aEsc = '\n'; + else if( *pRun == 'r' ) + aEsc = '\r'; + else if( *pRun == 't' ) + aEsc = '\t'; + else if( *pRun == 'b' ) + aEsc = '\b'; + else if( *pRun == 'f' ) + aEsc = '\f'; + else if( *pRun == '(' ) + aEsc = '('; + else if( *pRun == ')' ) + aEsc = ')'; + else if( *pRun == '\\' ) + aEsc = '\\'; + else if( *pRun == '\n' ) + { + pRun++; + continue; + } + else if( *pRun == '\r' ) + { + pRun++; + if( *pRun == '\n' ) + pRun++; + continue; + } + else + { + int i = 0; + while( i++ < 3 && *pRun >= '0' && *pRun <= '7' ) + aEsc = 8*aEsc + (*pRun++ - '0'); + // move pointer back to last character of octal sequence + pRun--; + } + aBuf.append( aEsc ); + } + } + else + aBuf.append( *pRun ); + // move pointer to next character + pRun++; + } + } + else if( *pStr == '<' ) + { + const char* pRun = pStr+1; + while( *pRun != '>' && pRun - pStr < nLen ) + { + char rResult = 0; + if( *pRun >= '0' && *pRun <= '9' ) + rResult = char( ( *pRun-'0' ) << 4 ); + else if( *pRun >= 'a' && *pRun <= 'f' ) + rResult = char( ( *pRun-'a' + 10 ) << 4 ); + else if( *pRun >= 'A' && *pRun <= 'F' ) + rResult = char( ( *pRun-'A' + 10 ) << 4 ); + pRun++; + if( *pRun != '>' && pRun - pStr < nLen ) + { + if( *pRun >= '0' && *pRun <= '9' ) + rResult |= char( *pRun-'0' ); + else if( *pRun >= 'a' && *pRun <= 'f' ) + rResult |= char( *pRun-'a' + 10 ); + else if( *pRun >= 'A' && *pRun <= 'F' ) + rResult |= char( *pRun-'A' + 10 ); + } + pRun++; + aBuf.append( rResult ); + } + } + + return aBuf.makeStringAndClear(); +} + +PDFNumber::~PDFNumber() +{ +} + +bool PDFNumber::emit( EmitContext& rWriteContext ) const +{ + OStringBuffer aBuf( 32 ); + aBuf.append( ' ' ); + + double fValue = m_fValue; + bool bNeg = false; + int nPrecision = 5; + if( fValue < 0.0 ) + { + bNeg = true; + fValue=-fValue; + } + + sal_Int64 nInt = static_cast<sal_Int64>(fValue); + fValue -= static_cast<double>(nInt); + // optimizing hardware may lead to a value of 1.0 after the subtraction + if( fValue == 1.0 || log10( 1.0-fValue ) <= -nPrecision ) + { + nInt++; + fValue = 0.0; + } + sal_Int64 nFrac = 0; + if( fValue ) + { + fValue *= pow( 10.0, static_cast<double>(nPrecision) ); + nFrac = static_cast<sal_Int64>(fValue); + } + if( bNeg && ( nInt || nFrac ) ) + aBuf.append( '-' ); + aBuf.append( nInt ); + if( nFrac ) + { + int i; + aBuf.append( '.' ); + sal_Int64 nBound = static_cast<sal_Int64>(pow( 10.0, nPrecision - 1.0 )+0.5); + for ( i = 0; ( i < nPrecision ) && nFrac; i++ ) + { + sal_Int64 nNumb = nFrac / nBound; + nFrac -= nNumb * nBound; + aBuf.append( nNumb ); + nBound /= 10; + } + } + + return rWriteContext.write( aBuf.getStr(), aBuf.getLength() ); +} + +PDFEntry* PDFNumber::clone() const +{ + return new PDFNumber( m_fValue ); +} + + +PDFBool::~PDFBool() +{ +} + +bool PDFBool::emit( EmitContext& rWriteContext ) const +{ + return m_bValue ? rWriteContext.write( " true", 5 ) : rWriteContext.write( " false", 6 ); +} + +PDFEntry* PDFBool::clone() const +{ + return new PDFBool( m_bValue ); +} + +PDFNull::~PDFNull() +{ +} + +bool PDFNull::emit( EmitContext& rWriteContext ) const +{ + return rWriteContext.write( " null", 5 ); +} + +PDFEntry* PDFNull::clone() const +{ + return new PDFNull(); +} + + +PDFObjectRef::~PDFObjectRef() +{ +} + +bool PDFObjectRef::emit( EmitContext& rWriteContext ) const +{ + OString aBuf = + " " + + OString::number( sal_Int32( m_nNumber ) ) + + " " + + OString::number( sal_Int32( m_nGeneration ) ) + + " R"; + return rWriteContext.write( aBuf.getStr(), aBuf.getLength() ); +} + +PDFEntry* PDFObjectRef::clone() const +{ + return new PDFObjectRef( m_nNumber, m_nGeneration ); +} + +PDFContainer::~PDFContainer() +{ +} + +bool PDFContainer::emitSubElements( EmitContext& rWriteContext ) const +{ + int nEle = m_aSubElements.size(); + for( int i = 0; i < nEle; i++ ) + { + if( rWriteContext.m_bDecrypt ) + { + const PDFName* pName = dynamic_cast<PDFName*>(m_aSubElements[i].get()); + if (pName && pName->m_aName == "Encrypt") + { + i++; + continue; + } + } + if( ! m_aSubElements[i]->emit( rWriteContext ) ) + return false; + } + return true; +} + +void PDFContainer::cloneSubElements( std::vector<std::unique_ptr<PDFEntry>>& rNewSubElements ) const +{ + int nEle = m_aSubElements.size(); + for( int i = 0; i < nEle; i++ ) + rNewSubElements.emplace_back( m_aSubElements[i]->clone() ); +} + +PDFObject* PDFContainer::findObject( unsigned int nNumber, unsigned int nGeneration ) const +{ + unsigned int nEle = m_aSubElements.size(); + for( unsigned int i = 0; i < nEle; i++ ) + { + PDFObject* pObject = dynamic_cast<PDFObject*>(m_aSubElements[i].get()); + if( pObject && + pObject->m_nNumber == nNumber && + pObject->m_nGeneration == nGeneration ) + { + return pObject; + } + } + return nullptr; +} + +PDFArray::~PDFArray() +{ +} + +bool PDFArray::emit( EmitContext& rWriteContext ) const +{ + if( ! rWriteContext.write( "[", 1 ) ) + return false; + if( ! emitSubElements( rWriteContext ) ) + return false; + return rWriteContext.write( "]", 1 ); +} + +PDFEntry* PDFArray::clone() const +{ + PDFArray* pNewAr = new PDFArray(); + cloneSubElements( pNewAr->m_aSubElements ); + return pNewAr; +} + +PDFDict::~PDFDict() +{ +} + +bool PDFDict::emit( EmitContext& rWriteContext ) const +{ + if( ! rWriteContext.write( "<<\n", 3 ) ) + return false; + if( ! emitSubElements( rWriteContext ) ) + return false; + return rWriteContext.write( "\n>>\n", 4 ); +} + +void PDFDict::insertValue( const OString& rName, std::unique_ptr<PDFEntry> pValue ) +{ + if( ! pValue ) + eraseValue( rName ); + + PDFEntry* pValueTmp = nullptr; + std::unordered_map<OString,PDFEntry*>::iterator it = m_aMap.find( rName ); + if( it == m_aMap.end() ) + { + // new name/value, pair, append it + m_aSubElements.emplace_back(std::make_unique<PDFName>(rName)); + m_aSubElements.emplace_back( std::move(pValue) ); + pValueTmp = m_aSubElements.back().get(); + } + else + { + unsigned int nSub = m_aSubElements.size(); + for( unsigned int i = 0; i < nSub; i++ ) + if( m_aSubElements[i].get() == it->second ) + { + m_aSubElements[i] = std::move(pValue); + pValueTmp = m_aSubElements[i].get(); + break; + } + } + assert(pValueTmp); + m_aMap[ rName ] = pValueTmp; +} + +void PDFDict::eraseValue( std::string_view rName ) +{ + unsigned int nEle = m_aSubElements.size(); + for( unsigned int i = 0; i < nEle; i++ ) + { + PDFName* pName = dynamic_cast<PDFName*>(m_aSubElements[i].get()); + if( pName && pName->m_aName == rName ) + { + for( unsigned int j = i+1; j < nEle; j++ ) + { + if( dynamic_cast<PDFComment*>(m_aSubElements[j].get()) == nullptr ) + { + // remove and free subelements from vector + m_aSubElements.erase( m_aSubElements.begin()+j ); + m_aSubElements.erase( m_aSubElements.begin()+i ); + buildMap(); + return; + } + } + } + } +} + +PDFEntry* PDFDict::buildMap() +{ + // clear map + m_aMap.clear(); + // build map + unsigned int nEle = m_aSubElements.size(); + PDFName* pName = nullptr; + for( unsigned int i = 0; i < nEle; i++ ) + { + if( dynamic_cast<PDFComment*>(m_aSubElements[i].get()) == nullptr ) + { + if( pName ) + { + m_aMap[ pName->m_aName ] = m_aSubElements[i].get(); + pName = nullptr; + } + else if( (pName = dynamic_cast<PDFName*>(m_aSubElements[i].get())) == nullptr ) + return m_aSubElements[i].get(); + } + } + return pName; +} + +PDFEntry* PDFDict::clone() const +{ + PDFDict* pNewDict = new PDFDict(); + cloneSubElements( pNewDict->m_aSubElements ); + pNewDict->buildMap(); + return pNewDict; +} + +PDFStream::~PDFStream() +{ +} + +bool PDFStream::emit( EmitContext& rWriteContext ) const +{ + return rWriteContext.copyOrigBytes( m_nBeginOffset, m_nEndOffset-m_nBeginOffset ); +} + +PDFEntry* PDFStream::clone() const +{ + return new PDFStream( m_nBeginOffset, m_nEndOffset, nullptr ); +} + +unsigned int PDFStream::getDictLength( const PDFContainer* pContainer ) const +{ + if( ! m_pDict ) + return 0; + // find /Length entry, can either be a direct or indirect number object + std::unordered_map<OString,PDFEntry*>::const_iterator it = + m_pDict->m_aMap.find( "Length" ); + if( it == m_pDict->m_aMap.end() ) + return 0; + PDFNumber* pNum = dynamic_cast<PDFNumber*>(it->second); + if( ! pNum && pContainer ) + { + PDFObjectRef* pRef = dynamic_cast<PDFObjectRef*>(it->second); + if( pRef ) + { + int nEle = pContainer->m_aSubElements.size(); + for (int i = 0; i < nEle; i++) + { + PDFObject* pObj = dynamic_cast<PDFObject*>(pContainer->m_aSubElements[i].get()); + if( pObj && + pObj->m_nNumber == pRef->m_nNumber && + pObj->m_nGeneration == pRef->m_nGeneration ) + { + if( pObj->m_pObject ) + pNum = dynamic_cast<PDFNumber*>(pObj->m_pObject); + break; + } + } + } + } + return pNum ? static_cast<unsigned int>(pNum->m_fValue) : 0; +} + +PDFObject::~PDFObject() +{ +} + +bool PDFObject::getDeflatedStream( std::unique_ptr<char[]>& rpStream, unsigned int* pBytes, const PDFContainer* pObjectContainer, EmitContext& rContext ) const +{ + bool bIsDeflated = false; + if( m_pStream && m_pStream->m_pDict && + m_pStream->m_nEndOffset > m_pStream->m_nBeginOffset+15 + ) + { + unsigned int nOuterStreamLen = m_pStream->m_nEndOffset - m_pStream->m_nBeginOffset; + rpStream.reset(new char[ nOuterStreamLen ]); + unsigned int nRead = rContext.readOrigBytes( m_pStream->m_nBeginOffset, nOuterStreamLen, rpStream.get() ); + if( nRead != nOuterStreamLen ) + { + rpStream.reset(); + *pBytes = 0; + return false; + } + // is there a filter entry ? + std::unordered_map<OString,PDFEntry*>::const_iterator it = + m_pStream->m_pDict->m_aMap.find( "Filter" ); + if( it != m_pStream->m_pDict->m_aMap.end() ) + { + PDFName* pFilter = dynamic_cast<PDFName*>(it->second); + if( ! pFilter ) + { + PDFArray* pArray = dynamic_cast<PDFArray*>(it->second); + if( pArray && ! pArray->m_aSubElements.empty() ) + { + pFilter = dynamic_cast<PDFName*>(pArray->m_aSubElements.front().get()); + } + } + + // is the (first) filter FlateDecode ? + if (pFilter && pFilter->m_aName == "FlateDecode") + { + bIsDeflated = true; + } + } + // prepare compressed data section + char* pStream = rpStream.get(); + if( pStream[0] == 's' ) + pStream += 6; // skip "stream" + // skip line end after "stream" + while( *pStream == '\r' || *pStream == '\n' ) + pStream++; + // get the compressed length + *pBytes = m_pStream->getDictLength( pObjectContainer ); + if( pStream != rpStream.get() ) + memmove( rpStream.get(), pStream, *pBytes ); + if( rContext.m_bDecrypt ) + { + EmitImplData* pEData = getEmitData( rContext ); + pEData->decrypt( reinterpret_cast<const sal_uInt8*>(rpStream.get()), + *pBytes, + reinterpret_cast<sal_uInt8*>(rpStream.get()), + m_nNumber, + m_nGeneration + ); // decrypt inplace + } + } + else + { + *pBytes = 0; + } + return bIsDeflated; +} + +static void unzipToBuffer( char* pBegin, unsigned int nLen, + sal_uInt8** pOutBuf, sal_uInt32* pOutLen ) +{ + z_stream aZStr; + aZStr.next_in = reinterpret_cast<Bytef *>(pBegin); + aZStr.avail_in = nLen; + aZStr.total_out = aZStr.total_in = 0; + aZStr.zalloc = nullptr; + aZStr.zfree = nullptr; + aZStr.opaque = nullptr; + + int err = inflateInit(&aZStr); + + const unsigned int buf_increment_size = 16384; + + if (auto p = static_cast<sal_uInt8*>(std::realloc(*pOutBuf, buf_increment_size))) + { + *pOutBuf = p; + aZStr.next_out = reinterpret_cast<Bytef*>(*pOutBuf); + aZStr.avail_out = buf_increment_size; + *pOutLen = buf_increment_size; + } + else + err = Z_MEM_ERROR; + while( err != Z_STREAM_END && err >= Z_OK && aZStr.avail_in ) + { + err = inflate( &aZStr, Z_NO_FLUSH ); + if( aZStr.avail_out == 0 ) + { + if( err != Z_STREAM_END ) + { + const int nNewAlloc = *pOutLen + buf_increment_size; + if (auto p = static_cast<sal_uInt8*>(std::realloc(*pOutBuf, nNewAlloc))) + { + *pOutBuf = p; + aZStr.next_out = reinterpret_cast<Bytef*>(*pOutBuf + *pOutLen); + aZStr.avail_out = buf_increment_size; + *pOutLen = nNewAlloc; + } + else + err = Z_MEM_ERROR; + } + } + } + if( err == Z_STREAM_END ) + { + if( aZStr.avail_out > 0 ) + *pOutLen -= aZStr.avail_out; + } + inflateEnd(&aZStr); + if( err < Z_OK ) + { + std::free( *pOutBuf ); + *pOutBuf = nullptr; + *pOutLen = 0; + } +} + +void PDFObject::writeStream( EmitContext& rWriteContext, const PDFFile* pParsedFile ) const +{ + if( !m_pStream ) + return; + + std::unique_ptr<char[]> pStream; + unsigned int nBytes = 0; + if( getDeflatedStream( pStream, &nBytes, pParsedFile, rWriteContext ) && nBytes && rWriteContext.m_bDeflate ) + { + sal_uInt8* pOutBytes = nullptr; + sal_uInt32 nOutBytes = 0; + unzipToBuffer( pStream.get(), nBytes, &pOutBytes, &nOutBytes ); + rWriteContext.write( pOutBytes, nOutBytes ); + std::free( pOutBytes ); + } + else if( pStream && nBytes ) + rWriteContext.write( pStream.get(), nBytes ); +} + +bool PDFObject::emit( EmitContext& rWriteContext ) const +{ + if( ! rWriteContext.write( "\n", 1 ) ) + return false; + + EmitImplData* pEData = getEmitData( rWriteContext ); + if( pEData ) + pEData->insertXref( m_nNumber, m_nGeneration, rWriteContext.getCurPos() ); + + OString aBuf = + OString::number( sal_Int32( m_nNumber ) ) + + " " + + OString::number( sal_Int32( m_nGeneration ) ) + + " obj\n"; + if( ! rWriteContext.write( aBuf.getStr(), aBuf.getLength() ) ) + return false; + + if( pEData ) + pEData->setDecryptObject( m_nNumber, m_nGeneration ); + if( (rWriteContext.m_bDeflate || rWriteContext.m_bDecrypt) && pEData ) + { + std::unique_ptr<char[]> pStream; + unsigned int nBytes = 0; + bool bDeflate = getDeflatedStream( pStream, &nBytes, pEData->m_pObjectContainer, rWriteContext ); + if( pStream && nBytes ) + { + // unzip the stream + sal_uInt8* pOutBytes = nullptr; + sal_uInt32 nOutBytes = 0; + if( bDeflate && rWriteContext.m_bDeflate ) + unzipToBuffer( pStream.get(), nBytes, &pOutBytes, &nOutBytes ); + else + { + // nothing to deflate, but decryption has happened + pOutBytes = reinterpret_cast<sal_uInt8*>(pStream.get()); + nOutBytes = static_cast<sal_uInt32>(nBytes); + } + + if( nOutBytes ) + { + // clone this object + std::unique_ptr<PDFObject> pClone(static_cast<PDFObject*>(clone())); + // set length in the dictionary to new stream length + std::unique_ptr<PDFNumber> pNewLen(new PDFNumber( double(nOutBytes) )); + pClone->m_pStream->m_pDict->insertValue( "Length", std::move(pNewLen) ); + + if( bDeflate && rWriteContext.m_bDeflate ) + { + // delete flatedecode filter + std::unordered_map<OString,PDFEntry*>::const_iterator it = + pClone->m_pStream->m_pDict->m_aMap.find( "Filter" ); + if( it != pClone->m_pStream->m_pDict->m_aMap.end() ) + { + PDFName* pFilter = dynamic_cast<PDFName*>(it->second); + if (pFilter && pFilter->m_aName == "FlateDecode") + pClone->m_pStream->m_pDict->eraseValue( "Filter" ); + else + { + PDFArray* pArray = dynamic_cast<PDFArray*>(it->second); + if( pArray && ! pArray->m_aSubElements.empty() ) + { + pFilter = dynamic_cast<PDFName*>(pArray->m_aSubElements.front().get()); + if (pFilter && pFilter->m_aName == "FlateDecode") + { + pArray->m_aSubElements.erase( pArray->m_aSubElements.begin() ); + } + } + } + } + } + + // write sub elements except stream + bool bRet = true; + unsigned int nEle = pClone->m_aSubElements.size(); + for( unsigned int i = 0; i < nEle && bRet; i++ ) + { + if( pClone->m_aSubElements[i].get() != pClone->m_pStream ) + bRet = pClone->m_aSubElements[i]->emit( rWriteContext ); + } + pClone.reset(); + // write stream + if( bRet ) + bRet = rWriteContext.write("stream\n", 7) + && rWriteContext.write(pOutBytes, nOutBytes) + && rWriteContext.write("\nendstream\nendobj\n", 18); + if( pOutBytes != reinterpret_cast<sal_uInt8*>(pStream.get()) ) + std::free( pOutBytes ); + pEData->setDecryptObject( 0, 0 ); + return bRet; + } + if( pOutBytes != reinterpret_cast<sal_uInt8*>(pStream.get()) ) + std::free( pOutBytes ); + } + } + + bool bRet = emitSubElements( rWriteContext ) && + rWriteContext.write( "\nendobj\n", 8 ); + if( pEData ) + pEData->setDecryptObject( 0, 0 ); + return bRet; +} + +PDFEntry* PDFObject::clone() const +{ + PDFObject* pNewOb = new PDFObject( m_nNumber, m_nGeneration ); + cloneSubElements( pNewOb->m_aSubElements ); + unsigned int nEle = m_aSubElements.size(); + for( unsigned int i = 0; i < nEle; i++ ) + { + if( m_aSubElements[i].get() == m_pObject ) + pNewOb->m_pObject = pNewOb->m_aSubElements[i].get(); + else if( m_aSubElements[i].get() == m_pStream && pNewOb->m_pObject ) + { + pNewOb->m_pStream = dynamic_cast<PDFStream*>(pNewOb->m_aSubElements[i].get()); + PDFDict* pNewDict = dynamic_cast<PDFDict*>(pNewOb->m_pObject); + if (pNewDict && pNewOb->m_pStream) + pNewOb->m_pStream->m_pDict = pNewDict; + } + } + return pNewOb; +} + +PDFTrailer::~PDFTrailer() +{ +} + +bool PDFTrailer::emit( EmitContext& rWriteContext ) const +{ + // get xref offset + unsigned int nXRefPos = rWriteContext.getCurPos(); + // begin xref section, object 0 is always free + if( ! rWriteContext.write( "xref\r\n" + "0 1\r\n" + "0000000000 65535 f\r\n", 31 ) ) + return false; + // check if we are emitting a complete PDF file + EmitImplData* pEData = getEmitData( rWriteContext ); + if( pEData ) + { + // emit object xrefs + const EmitImplData::XRefTable& rXRefs = pEData->m_aXRefTable; + EmitImplData::XRefTable::const_iterator section_begin, section_end; + section_begin = rXRefs.begin(); + while( section_begin != rXRefs.end() ) + { + // find end of continuous object numbers + section_end = section_begin; + unsigned int nLast = section_begin->first; + while( (++section_end) != rXRefs.end() && + section_end->first == nLast+1 ) + nLast = section_end->first; + // write first object number and number of following entries + OStringBuffer aBuf( 21 ); + aBuf.append( sal_Int32( section_begin->first ) ); + aBuf.append( ' ' ); + aBuf.append( sal_Int32(nLast - section_begin->first + 1) ); + aBuf.append( "\r\n" ); + if( ! rWriteContext.write( aBuf.getStr(), aBuf.getLength() ) ) + return false; + while( section_begin != section_end ) + { + // write 20 char entry of form + // 0000offset 00gen n\r\n + aBuf.setLength( 0 ); + OString aOffset( OString::number( section_begin->second.second ) ); + int nPad = 10 - aOffset.getLength(); + for( int i = 0; i < nPad; i++ ) + aBuf.append( '0' ); + aBuf.append( aOffset ); + aBuf.append( ' ' ); + OString aGeneration( OString::number( section_begin->second.first ) ); + nPad = 5 - aGeneration.getLength(); + for( int i = 0; i < nPad; i++ ) + aBuf.append( '0' ); + aBuf.append( aGeneration ); + aBuf.append( " n\r\n" ); + if( ! rWriteContext.write( aBuf.getStr(), 20 ) ) + return false; + ++section_begin; + } + } + } + if( ! rWriteContext.write( "trailer\n", 8 ) ) + return false; + if( ! emitSubElements( rWriteContext ) ) + return false; + if( ! rWriteContext.write( "startxref\n", 10 ) ) + return false; + OString aOffset( OString::number( nXRefPos ) ); + if( ! rWriteContext.write( aOffset.getStr(), aOffset.getLength() ) ) + return false; + return rWriteContext.write( "\n%%EOF\n", 7 ); +} + +PDFEntry* PDFTrailer::clone() const +{ + PDFTrailer* pNewTr = new PDFTrailer(); + cloneSubElements( pNewTr->m_aSubElements ); + unsigned int nEle = m_aSubElements.size(); + for( unsigned int i = 0; i < nEle; i++ ) + { + if( m_aSubElements[i].get() == m_pDict ) + { + pNewTr->m_pDict = dynamic_cast<PDFDict*>(pNewTr->m_aSubElements[i].get()); + break; + } + } + return pNewTr; +} + +#define ENCRYPTION_KEY_LEN 16 +#define ENCRYPTION_BUF_LEN 32 + +namespace pdfparse { +struct PDFFileImplData +{ + bool m_bIsEncrypted; + bool m_bStandardHandler; + sal_uInt32 m_nAlgoVersion; + sal_uInt32 m_nStandardRevision; + sal_uInt32 m_nKeyLength; + sal_uInt8 m_aOEntry[32] = {}; + sal_uInt8 m_aUEntry[32] = {}; + sal_uInt32 m_nPEntry; + OString m_aDocID; + rtlCipher m_aCipher; + + sal_uInt8 m_aDecryptionKey[ENCRYPTION_KEY_LEN+5] = {}; // maximum handled key length + + PDFFileImplData() : + m_bIsEncrypted( false ), + m_bStandardHandler( false ), + m_nAlgoVersion( 0 ), + m_nStandardRevision( 0 ), + m_nKeyLength( 0 ), + m_nPEntry( 0 ), + m_aCipher( nullptr ) + { + } + + ~PDFFileImplData() + { + if( m_aCipher ) + rtl_cipher_destroyARCFOUR( m_aCipher ); + } +}; +} + +PDFFile::PDFFile() + : m_nMajor( 0 ), m_nMinor( 0 ) +{ +} + +PDFFile::~PDFFile() +{ +} + +bool PDFFile::isEncrypted() const +{ + return impl_getData()->m_bIsEncrypted; +} + +bool PDFFile::decrypt( const sal_uInt8* pInBuffer, sal_uInt32 nLen, sal_uInt8* pOutBuffer, + unsigned int nObject, unsigned int nGeneration ) const +{ + if( ! isEncrypted() ) + return false; + + if( ! m_pData->m_aCipher ) + m_pData->m_aCipher = rtl_cipher_createARCFOUR( rtl_Cipher_ModeStream ); + + // modify encryption key + sal_uInt32 i = m_pData->m_nKeyLength; + m_pData->m_aDecryptionKey[i++] = sal_uInt8(nObject&0xff); + m_pData->m_aDecryptionKey[i++] = sal_uInt8((nObject>>8)&0xff); + m_pData->m_aDecryptionKey[i++] = sal_uInt8((nObject>>16)&0xff); + m_pData->m_aDecryptionKey[i++] = sal_uInt8(nGeneration&0xff); + m_pData->m_aDecryptionKey[i++] = sal_uInt8((nGeneration>>8)&0xff); + + ::std::vector<unsigned char> const aSum(::comphelper::Hash::calculateHash( + m_pData->m_aDecryptionKey, i, ::comphelper::HashType::MD5)); + + if( i > 16 ) + i = 16; + + rtlCipherError aErr = rtl_cipher_initARCFOUR( m_pData->m_aCipher, + rtl_Cipher_DirectionDecode, + aSum.data(), i, + nullptr, 0 ); + if( aErr == rtl_Cipher_E_None ) + aErr = rtl_cipher_decodeARCFOUR( m_pData->m_aCipher, + pInBuffer, nLen, + pOutBuffer, nLen ); + return aErr == rtl_Cipher_E_None; +} + +const sal_uInt8 nPadString[32] = +{ + 0x28, 0xBF, 0x4E, 0x5E, 0x4E, 0x75, 0x8A, 0x41, 0x64, 0x00, 0x4E, 0x56, 0xFF, 0xFA, 0x01, 0x08, + 0x2E, 0x2E, 0x00, 0xB6, 0xD0, 0x68, 0x3E, 0x80, 0x2F, 0x0C, 0xA9, 0xFE, 0x64, 0x53, 0x69, 0x7A +}; + +static void pad_or_truncate_to_32( const OString& rStr, char* pBuffer ) +{ + int nLen = rStr.getLength(); + if( nLen > 32 ) + nLen = 32; + const char* pStr = rStr.getStr(); + memcpy( pBuffer, pStr, nLen ); + int i = 0; + while( nLen < 32 ) + pBuffer[nLen++] = nPadString[i++]; +} + +// pass at least pData->m_nKeyLength bytes in +static sal_uInt32 password_to_key( const OString& rPwd, sal_uInt8* pOutKey, PDFFileImplData const * pData, bool bComputeO ) +{ + // see PDF reference 1.4 Algorithm 3.2 + // encrypt pad string + char aPadPwd[ENCRYPTION_BUF_LEN]; + pad_or_truncate_to_32( rPwd, aPadPwd ); + ::comphelper::Hash aDigest(::comphelper::HashType::MD5); + aDigest.update(reinterpret_cast<unsigned char const*>(aPadPwd), sizeof(aPadPwd)); + if( ! bComputeO ) + { + aDigest.update(pData->m_aOEntry, 32); + sal_uInt8 aPEntry[4]; + aPEntry[0] = static_cast<sal_uInt8>(pData->m_nPEntry & 0xff); + aPEntry[1] = static_cast<sal_uInt8>((pData->m_nPEntry >> 8 ) & 0xff); + aPEntry[2] = static_cast<sal_uInt8>((pData->m_nPEntry >> 16) & 0xff); + aPEntry[3] = static_cast<sal_uInt8>((pData->m_nPEntry >> 24) & 0xff); + aDigest.update(aPEntry, sizeof(aPEntry)); + aDigest.update(reinterpret_cast<unsigned char const*>(pData->m_aDocID.getStr()), pData->m_aDocID.getLength()); + } + ::std::vector<unsigned char> nSum(aDigest.finalize()); + if( pData->m_nStandardRevision == 3 ) + { + for( int i = 0; i < 50; i++ ) + { + nSum = ::comphelper::Hash::calculateHash(nSum.data(), nSum.size(), + ::comphelper::HashType::MD5); + } + } + sal_uInt32 nLen = pData->m_nKeyLength; + if( nLen > RTL_DIGEST_LENGTH_MD5 ) + nLen = RTL_DIGEST_LENGTH_MD5; + memcpy( pOutKey, nSum.data(), nLen ); + return nLen; +} + +static bool check_user_password( const OString& rPwd, PDFFileImplData* pData ) +{ + // see PDF reference 1.4 Algorithm 3.6 + bool bValid = false; + sal_uInt8 aKey[ENCRYPTION_KEY_LEN]; + sal_uInt32 nKeyLen = password_to_key( rPwd, aKey, pData, false ); + // save (at this time potential) decryption key for later use + memcpy( pData->m_aDecryptionKey, aKey, nKeyLen ); + if( pData->m_nStandardRevision == 2 ) + { + sal_uInt8 nEncryptedEntry[ENCRYPTION_BUF_LEN] = {}; + // see PDF reference 1.4 Algorithm 3.4 + // encrypt pad string + if (rtl_cipher_initARCFOUR( pData->m_aCipher, rtl_Cipher_DirectionEncode, + aKey, nKeyLen, + nullptr, 0 ) + != rtl_Cipher_E_None) + { + return false; //TODO: differentiate "failed to decrypt" from "wrong password" + } + rtl_cipher_encodeARCFOUR( pData->m_aCipher, nPadString, sizeof( nPadString ), + nEncryptedEntry, sizeof( nEncryptedEntry ) ); + bValid = (memcmp( nEncryptedEntry, pData->m_aUEntry, 32 ) == 0); + } + else if( pData->m_nStandardRevision == 3 ) + { + // see PDF reference 1.4 Algorithm 3.5 + ::comphelper::Hash aDigest(::comphelper::HashType::MD5); + aDigest.update(nPadString, sizeof(nPadString)); + aDigest.update(reinterpret_cast<unsigned char const*>(pData->m_aDocID.getStr()), pData->m_aDocID.getLength()); + ::std::vector<unsigned char> nEncryptedEntry(aDigest.finalize()); + if (rtl_cipher_initARCFOUR( pData->m_aCipher, rtl_Cipher_DirectionEncode, + aKey, sizeof(aKey), nullptr, 0 ) + != rtl_Cipher_E_None) + { + return false; //TODO: differentiate "failed to decrypt" from "wrong password" + } + rtl_cipher_encodeARCFOUR( pData->m_aCipher, + nEncryptedEntry.data(), 16, + nEncryptedEntry.data(), 16 ); // encrypt in place + for( int i = 1; i <= 19; i++ ) // do it 19 times, start with 1 + { + sal_uInt8 aTempKey[ENCRYPTION_KEY_LEN]; + for( size_t j = 0; j < sizeof(aTempKey); j++ ) + aTempKey[j] = static_cast<sal_uInt8>( aKey[j] ^ i ); + + if (rtl_cipher_initARCFOUR( pData->m_aCipher, rtl_Cipher_DirectionEncode, + aTempKey, sizeof(aTempKey), nullptr, 0 ) + != rtl_Cipher_E_None) + { + return false; //TODO: differentiate "failed to decrypt" from "wrong password" + } + rtl_cipher_encodeARCFOUR( pData->m_aCipher, + nEncryptedEntry.data(), 16, + nEncryptedEntry.data(), 16 ); // encrypt in place + } + bValid = (memcmp( nEncryptedEntry.data(), pData->m_aUEntry, 16 ) == 0); + } + return bValid; +} + +bool PDFFile::usesSupportedEncryptionFormat() const +{ + return m_pData->m_bStandardHandler && + m_pData->m_nAlgoVersion >= 1 && + m_pData->m_nAlgoVersion <= 2 && + m_pData->m_nStandardRevision >= 2 && + m_pData->m_nStandardRevision <= 3; +} + +bool PDFFile::setupDecryptionData( const OString& rPwd ) const +{ + if( !impl_getData()->m_bIsEncrypted ) + return rPwd.isEmpty(); + + // check if we can handle this encryption at all + if( ! usesSupportedEncryptionFormat() ) + return false; + + if( ! m_pData->m_aCipher ) + m_pData->m_aCipher = rtl_cipher_createARCFOUR(rtl_Cipher_ModeStream); + + // first try user password + bool bValid = check_user_password( rPwd, m_pData.get() ); + + if( ! bValid ) + { + // try owner password + // see PDF reference 1.4 Algorithm 3.7 + sal_uInt8 aKey[ENCRYPTION_KEY_LEN]; + sal_uInt8 nPwd[ENCRYPTION_BUF_LEN] = {}; + sal_uInt32 nKeyLen = password_to_key( rPwd, aKey, m_pData.get(), true ); + if( m_pData->m_nStandardRevision == 2 ) + { + if (rtl_cipher_initARCFOUR( m_pData->m_aCipher, rtl_Cipher_DirectionDecode, + aKey, nKeyLen, nullptr, 0 ) + != rtl_Cipher_E_None) + { + return false; //TODO: differentiate "failed to decrypt" from "wrong password" + } + rtl_cipher_decodeARCFOUR( m_pData->m_aCipher, + m_pData->m_aOEntry, 32, + nPwd, 32 ); + } + else if( m_pData->m_nStandardRevision == 3 ) + { + memcpy( nPwd, m_pData->m_aOEntry, 32 ); + for( int i = 19; i >= 0; i-- ) + { + sal_uInt8 nTempKey[ENCRYPTION_KEY_LEN]; + for( size_t j = 0; j < sizeof(nTempKey); j++ ) + nTempKey[j] = sal_uInt8(aKey[j] ^ i); + if (rtl_cipher_initARCFOUR( m_pData->m_aCipher, rtl_Cipher_DirectionDecode, + nTempKey, nKeyLen, nullptr, 0 ) + != rtl_Cipher_E_None) + { + return false; //TODO: differentiate "failed to decrypt" from "wrong password" + } + rtl_cipher_decodeARCFOUR( m_pData->m_aCipher, + nPwd, 32, + nPwd, 32 ); // decrypt inplace + } + } + bValid = check_user_password( OString( reinterpret_cast<char*>(nPwd), 32 ), m_pData.get() ); + } + + return bValid; +} + +PDFFileImplData* PDFFile::impl_getData() const +{ + if( m_pData ) + return m_pData.get(); + m_pData.reset( new PDFFileImplData ); + // check for encryption dict in a trailer + unsigned int nElements = m_aSubElements.size(); + while( nElements-- > 0 ) + { + PDFTrailer* pTrailer = dynamic_cast<PDFTrailer*>(m_aSubElements[nElements].get()); + if( pTrailer && pTrailer->m_pDict ) + { + // search doc id + PDFDict::Map::iterator doc_id = pTrailer->m_pDict->m_aMap.find( "ID" ); + if( doc_id != pTrailer->m_pDict->m_aMap.end() ) + { + PDFArray* pArr = dynamic_cast<PDFArray*>(doc_id->second); + if( pArr && !pArr->m_aSubElements.empty() ) + { + PDFString* pStr = dynamic_cast<PDFString*>(pArr->m_aSubElements[0].get()); + if( pStr ) + m_pData->m_aDocID = pStr->getFilteredString(); +#if OSL_DEBUG_LEVEL > 0 + OUStringBuffer aTmp; + for( int i = 0; i < m_pData->m_aDocID.getLength(); i++ ) + aTmp.append(static_cast<sal_Int32>(sal_uInt8(m_pData->m_aDocID[i])), 16); + SAL_INFO("sdext.pdfimport.pdfparse", "DocId is <" << aTmp.makeStringAndClear() << ">"); +#endif + } + } + // search Encrypt entry + PDFDict::Map::iterator enc = + pTrailer->m_pDict->m_aMap.find( "Encrypt" ); + if( enc != pTrailer->m_pDict->m_aMap.end() ) + { + PDFDict* pDict = dynamic_cast<PDFDict*>(enc->second); + if( ! pDict ) + { + PDFObjectRef* pRef = dynamic_cast<PDFObjectRef*>(enc->second); + if( pRef ) + { + PDFObject* pObj = findObject( pRef ); + if( pObj && pObj->m_pObject ) + pDict = dynamic_cast<PDFDict*>(pObj->m_pObject); + } + } + if( pDict ) + { + PDFDict::Map::iterator filter = pDict->m_aMap.find( "Filter" ); + PDFDict::Map::iterator version = pDict->m_aMap.find( "V" ); + PDFDict::Map::iterator len = pDict->m_aMap.find( "Length" ); + PDFDict::Map::iterator o_ent = pDict->m_aMap.find( "O" ); + PDFDict::Map::iterator u_ent = pDict->m_aMap.find( "U" ); + PDFDict::Map::iterator r_ent = pDict->m_aMap.find( "R" ); + PDFDict::Map::iterator p_ent = pDict->m_aMap.find( "P" ); + if( filter != pDict->m_aMap.end() ) + { + m_pData->m_bIsEncrypted = true; + m_pData->m_nKeyLength = 5; + if( version != pDict->m_aMap.end() ) + { + PDFNumber* pNum = dynamic_cast<PDFNumber*>(version->second); + if( pNum ) + m_pData->m_nAlgoVersion = static_cast<sal_uInt32>(pNum->m_fValue); + } + if( m_pData->m_nAlgoVersion >= 3 ) + m_pData->m_nKeyLength = 16; + if( len != pDict->m_aMap.end() ) + { + PDFNumber* pNum = dynamic_cast<PDFNumber*>(len->second); + if( pNum ) + m_pData->m_nKeyLength = static_cast<sal_uInt32>(pNum->m_fValue) / 8; + } + PDFName* pFilter = dynamic_cast<PDFName*>(filter->second); + if( pFilter && pFilter->getFilteredName() == "Standard" ) + m_pData->m_bStandardHandler = true; + if( o_ent != pDict->m_aMap.end() ) + { + PDFString* pString = dynamic_cast<PDFString*>(o_ent->second); + if( pString ) + { + OString aEnt = pString->getFilteredString(); + if( aEnt.getLength() == 32 ) + memcpy( m_pData->m_aOEntry, aEnt.getStr(), 32 ); +#if OSL_DEBUG_LEVEL > 0 + else + { + OUStringBuffer aTmp; + for( int i = 0; i < aEnt.getLength(); i++ ) + aTmp.append(" " + OUString::number(sal_uInt8(aEnt[i]), 16)); + SAL_WARN("sdext.pdfimport.pdfparse", + "O entry has length " << static_cast<int>(aEnt.getLength()) << ", should be 32 <" << aTmp.makeStringAndClear() << ">" ); + } +#endif + } + } + if( u_ent != pDict->m_aMap.end() ) + { + PDFString* pString = dynamic_cast<PDFString*>(u_ent->second); + if( pString ) + { + OString aEnt = pString->getFilteredString(); + if( aEnt.getLength() == 32 ) + memcpy( m_pData->m_aUEntry, aEnt.getStr(), 32 ); +#if OSL_DEBUG_LEVEL > 0 + else + { + OUStringBuffer aTmp; + for( int i = 0; i < aEnt.getLength(); i++ ) + aTmp.append(" " + OUString::number(sal_uInt8(aEnt[i]), 16)); + SAL_WARN("sdext.pdfimport.pdfparse", + "U entry has length " << static_cast<int>(aEnt.getLength()) << ", should be 32 <" << aTmp.makeStringAndClear() << ">" ); + } +#endif + } + } + if( r_ent != pDict->m_aMap.end() ) + { + PDFNumber* pNum = dynamic_cast<PDFNumber*>(r_ent->second); + if( pNum ) + m_pData->m_nStandardRevision = static_cast<sal_uInt32>(pNum->m_fValue); + } + if( p_ent != pDict->m_aMap.end() ) + { + PDFNumber* pNum = dynamic_cast<PDFNumber*>(p_ent->second); + if( pNum ) + m_pData->m_nPEntry = static_cast<sal_uInt32>(static_cast<sal_Int32>(pNum->m_fValue)); + SAL_INFO("sdext.pdfimport.pdfparse", "p entry is " << m_pData->m_nPEntry ); + } + + SAL_INFO("sdext.pdfimport.pdfparse", "Encryption dict: sec handler: " << (pFilter ? pFilter->getFilteredName() : OUString("<unknown>")) << ", version = " << static_cast<int>(m_pData->m_nAlgoVersion) << ", revision = " << static_cast<int>(m_pData->m_nStandardRevision) << ", key length = " << m_pData->m_nKeyLength ); + break; + } + } + } + } + } + + return m_pData.get(); +} + +bool PDFFile::emit( EmitContext& rWriteContext ) const +{ + setEmitData( rWriteContext, new EmitImplData( this ) ); + + OString aBuf = + "%PDF-" + + OString::number( sal_Int32( m_nMajor ) ) + + "." + + OString::number( sal_Int32( m_nMinor ) ) + + "\n"; + if( ! rWriteContext.write( aBuf.getStr(), aBuf.getLength() ) ) + return false; + return emitSubElements( rWriteContext ); +} + +PDFEntry* PDFFile::clone() const +{ + PDFFile* pNewFl = new PDFFile(); + pNewFl->m_nMajor = m_nMajor; + pNewFl->m_nMinor = m_nMinor; + cloneSubElements( pNewFl->m_aSubElements ); + return pNewFl; +} + +PDFPart::~PDFPart() +{ +} + +bool PDFPart::emit( EmitContext& rWriteContext ) const +{ + return emitSubElements( rWriteContext ); +} + +PDFEntry* PDFPart::clone() const +{ + PDFPart* pNewPt = new PDFPart(); + cloneSubElements( pNewPt->m_aSubElements ); + return pNewPt; +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ diff --git a/sdext/source/pdfimport/pdfparse/pdfparse.cxx b/sdext/source/pdfimport/pdfparse/pdfparse.cxx new file mode 100644 index 000000000..bbdb51c5a --- /dev/null +++ b/sdext/source/pdfimport/pdfparse/pdfparse.cxx @@ -0,0 +1,701 @@ +/* -*- 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 <pdfparse.hxx> + +// boost using obsolete stuff +#if defined(_MSC_VER) +#pragma warning(push) +#pragma warning(disable:4996) +#pragma warning(disable:4503) +#endif + +// workaround windows compiler: do not include multi_pass.hpp +#include <boost/spirit/include/classic_core.hpp> +#include <boost/spirit/include/classic_utility.hpp> +#include <boost/spirit/include/classic_error_handling.hpp> +#include <boost/spirit/include/classic_file_iterator.hpp> +#include <boost/bind/bind.hpp> + +#include <string.h> + +#include <o3tl/safeint.hxx> +#include <rtl/strbuf.hxx> +#include <rtl/ustrbuf.hxx> +#include <sal/log.hxx> + +// disable warnings again because someone along the line has enabled them +// (we have included boost headers, what did you expect?) +#if defined(_MSC_VER) +#pragma warning(push) +#pragma warning(disable:4996) +#pragma warning(disable:4503) +#endif + + +using namespace boost::spirit::classic; +using namespace pdfparse; + +namespace { + +class StringEmitContext : public EmitContext +{ + OStringBuffer m_aBuf; + public: + StringEmitContext() : m_aBuf(256) {} + + virtual bool write( const void* pBuf, unsigned int nLen ) noexcept override + { + m_aBuf.append( static_cast<const char*>(pBuf), nLen ); + return true; + } + virtual unsigned int getCurPos() noexcept override { return m_aBuf.getLength(); } + virtual bool copyOrigBytes( unsigned int nOrigOffset, unsigned int nLen ) noexcept override + { return (nOrigOffset+nLen < o3tl::make_unsigned(m_aBuf.getLength()) ) && + write( m_aBuf.getStr() + nOrigOffset, nLen ); } + virtual unsigned int readOrigBytes( unsigned int nOrigOffset, unsigned int nLen, void* pBuf ) noexcept override + { + if( nOrigOffset+nLen < o3tl::make_unsigned(m_aBuf.getLength()) ) + { + memcpy( pBuf, m_aBuf.getStr()+nOrigOffset, nLen ); + return nLen; + } + return 0; + } + + OString getString() { return m_aBuf.makeStringAndClear(); } +}; + +template< class iteratorT > +class PDFGrammar : public grammar< PDFGrammar<iteratorT> > +{ +public: + + explicit PDFGrammar( const iteratorT& first ) + : m_fDouble( 0.0 ), m_aGlobalBegin( first ) {} + ~PDFGrammar() + { + if( !m_aObjectStack.empty() ) + delete m_aObjectStack.front(); + } + + double m_fDouble; + std::vector< unsigned int > m_aUIntStack; + std::vector< PDFEntry* > m_aObjectStack; + OString m_aErrorString; + iteratorT m_aGlobalBegin; + +public: + struct pdf_string_parser + { + typedef nil_t result_t; + template <typename ScannerT> + std::ptrdiff_t + operator()(ScannerT const& scan, result_t&) const + { + std::ptrdiff_t len = 0; + + int nBraceLevel = 0; + while( ! scan.at_end() ) + { + char c = *scan; + if( c == ')' ) + { + nBraceLevel--; + if( nBraceLevel < 0 ) + break; + } + else if( c == '(' ) + nBraceLevel++; + else if( c == '\\' ) // ignore escaped braces + { + ++len; + ++scan.first; // tdf#63054: avoid skipping spaces + if( scan.first == scan.last ) // tdf#63054: avoid skipping spaces + break; + } + ++len; + ++scan; + } + return scan.at_end() ? -1 : len; + } + }; + + template< typename ScannerT > + struct definition + { + explicit definition( const PDFGrammar<iteratorT>& rSelf ) + { + using namespace boost::placeholders; + + PDFGrammar<iteratorT>* pSelf = const_cast< PDFGrammar<iteratorT>* >( &rSelf ); + + // workaround workshop compiler: comment_p doesn't work + // comment = comment_p("%")[boost::bind(&PDFGrammar::pushComment, pSelf, _1, _2 )]; + comment = lexeme_d[ (ch_p('%') >> *(~ch_p('\r') & ~ch_p('\n')) >> eol_p)[boost::bind(&PDFGrammar::pushComment, pSelf, _1, _2 )] ]; + + boolean = (str_p("true") | str_p("false"))[boost::bind(&PDFGrammar::pushBool, pSelf, _1, _2)]; + + // workaround workshop compiler: confix_p doesn't work + //stream = confix_p( "stream", *anychar_p, "endstream" )[boost::bind(&PDFGrammar::emitStream, pSelf, _1, _2 )]; + stream = (str_p("stream") >> *(anychar_p - str_p("endstream")) >> str_p("endstream"))[boost::bind(&PDFGrammar::emitStream, pSelf, _1, _2 )]; + + name = lexeme_d[ + ch_p('/') + >> (*(anychar_p-chset_p("\t\n\f\r ()<>[]{}/%")-ch_p('\0'))) + [boost::bind(&PDFGrammar::pushName, pSelf, _1, _2)] ]; + + // workaround workshop compiler: confix_p doesn't work + //stringtype = ( confix_p("(",*anychar_p, ")") | + // confix_p("<",*xdigit_p, ">") ) + // [boost::bind(&PDFGrammar::pushString,pSelf, _1, _2)]; + + stringtype = ( ( ch_p('(') >> functor_parser<pdf_string_parser>() >> ch_p(')') ) | + ( ch_p('<') >> *xdigit_p >> ch_p('>') ) ) + [boost::bind(&PDFGrammar::pushString,pSelf, _1, _2)]; + + null_object = str_p( "null" )[boost::bind(&PDFGrammar::pushNull, pSelf, _1, _2)]; + + #ifdef USE_ASSIGN_ACTOR + objectref = ( uint_p[push_back_a(pSelf->m_aUIntStack)] + >> uint_p[push_back_a(pSelf->m_aUIntStack)] + >> ch_p('R') + >> eps_p + )[boost::bind(&PDFGrammar::pushObjectRef, pSelf, _1, _2)]; + #else + objectref = ( uint_p[boost::bind(&PDFGrammar::push_back_action_uint, pSelf, _1)] + >> uint_p[boost::bind(&PDFGrammar::push_back_action_uint, pSelf, _1)] + >> ch_p('R') + >> eps_p + )[boost::bind(&PDFGrammar::pushObjectRef, pSelf, _1, _2)]; + #endif + + #ifdef USE_ASSIGN_ACTOR + simple_type = objectref | name | + ( real_p[assign_a(pSelf->m_fDouble)] >> eps_p ) + [boost::bind(&PDFGrammar::pushDouble, pSelf, _1, _2)] + | stringtype | boolean | null_object; + #else + simple_type = objectref | name | + ( real_p[boost::bind(&PDFGrammar::assign_action_double, pSelf, _1)] >> eps_p ) + [boost::bind(&PDFGrammar::pushDouble, pSelf, _1, _2)] + | stringtype | boolean | null_object; + #endif + + dict_begin = str_p( "<<" )[boost::bind(&PDFGrammar::beginDict, pSelf, _1, _2)]; + dict_end = str_p( ">>" )[boost::bind(&PDFGrammar::endDict, pSelf, _1, _2)]; + + array_begin = str_p("[")[boost::bind(&PDFGrammar::beginArray,pSelf, _1, _2)]; + array_end = str_p("]")[boost::bind(&PDFGrammar::endArray,pSelf, _1, _2)]; + + #ifdef USE_ASSIGN_ACTOR + object_begin= uint_p[push_back_a(pSelf->m_aUIntStack)] + >> uint_p[push_back_a(pSelf->m_aUIntStack)] + >> str_p("obj" )[boost::bind(&PDFGrammar::beginObject, pSelf, _1, _2)]; + #else + object_begin= uint_p[boost::bind(&PDFGrammar::push_back_action_uint, pSelf, _1)] + >> uint_p[boost::bind(&PDFGrammar::push_back_action_uint, pSelf, _1)] + >> str_p("obj" )[boost::bind(&PDFGrammar::beginObject, pSelf, _1, _2)]; + #endif + object_end = str_p( "endobj" )[boost::bind(&PDFGrammar::endObject, pSelf, _1, _2)]; + + xref = str_p( "xref" ) >> uint_p >> uint_p + >> lexeme_d[ + +( repeat_p(10)[digit_p] + >> blank_p + >> repeat_p(5)[digit_p] + >> blank_p + >> ( ch_p('n') | ch_p('f') ) + >> repeat_p(2)[space_p] + ) ]; + + dict_element= dict_begin | comment | simple_type + | array_begin | array_end | dict_end; + + object = object_begin + >> *dict_element + >> !stream + >> object_end; + + trailer = str_p( "trailer" )[boost::bind(&PDFGrammar::beginTrailer,pSelf,_1,_2)] + >> *dict_element + >> str_p("startxref") + >> uint_p + >> str_p("%%EOF")[boost::bind(&PDFGrammar::endTrailer,pSelf,_1,_2)]; + + #ifdef USE_ASSIGN_ACTOR + pdfrule = ! (lexeme_d[ + str_p( "%PDF-" ) + >> uint_p[push_back_a(pSelf->m_aUIntStack)] + >> ch_p('.') + >> uint_p[push_back_a(pSelf->m_aUIntStack)] + >> *((~ch_p('\r') & ~ch_p('\n'))) + >> eol_p + ])[boost::bind(&PDFGrammar::haveFile,pSelf, _1, _2)] + >> *( comment | object | ( xref >> trailer ) ); + #else + pdfrule = ! (lexeme_d[ + str_p( "%PDF-" ) + >> uint_p[boost::bind(&PDFGrammar::push_back_action_uint, pSelf, _1)] + >> ch_p('.') + >> uint_p[boost::bind(&PDFGrammar::push_back_action_uint, pSelf, _1)] + >> *(~ch_p('\r') & ~ch_p('\n')) + >> eol_p + ])[boost::bind(&PDFGrammar::haveFile,pSelf, _1, _2)] + >> *( comment | object | ( xref >> trailer ) ); + #endif + } + rule< ScannerT > comment, stream, boolean, name, stringtype, null_object, simple_type, + objectref, array, value, dict_element, dict_begin, dict_end, + array_begin, array_end, object, object_begin, object_end, + xref, trailer, pdfrule; + + const rule< ScannerT >& start() const { return pdfrule; } + }; + + #ifndef USE_ASSIGN_ACTOR + void push_back_action_uint( unsigned int i ) + { + m_aUIntStack.push_back( i ); + } + void assign_action_double( double d ) + { + m_fDouble = d; + } + #endif + + static void parseError( const char* pMessage, iteratorT pLocation ) + { + throw_( pLocation, pMessage ); + } + + OString iteratorToString( iteratorT first, iteratorT last ) const + { + OStringBuffer aStr( 32 ); + while( first != last ) + { + aStr.append( *first ); + ++first; + } + return aStr.makeStringAndClear(); + } + + void haveFile( iteratorT pBegin, SAL_UNUSED_PARAMETER iteratorT /*pEnd*/ ) + { + if( m_aObjectStack.empty() ) + { + PDFFile* pFile = new PDFFile(); + pFile->m_nMinor = m_aUIntStack.back(); + m_aUIntStack.pop_back(); + pFile->m_nMajor = m_aUIntStack.back(); + m_aUIntStack.pop_back(); + m_aObjectStack.push_back( pFile ); + } + else + parseError( "found file header in unusual place", pBegin ); + } + + void pushComment( iteratorT first, iteratorT last ) + { + // add a comment to the current stack element + PDFComment* pComment = + new PDFComment(iteratorToString(first,last)); + if( m_aObjectStack.empty() ) + m_aObjectStack.push_back( new PDFPart() ); + PDFContainer* pContainer = dynamic_cast<PDFContainer*>(m_aObjectStack.back()); + if( pContainer == nullptr ) + parseError( "comment without container", first ); + pContainer->m_aSubElements.emplace_back( pComment ); + } + + void insertNewValue( std::unique_ptr<PDFEntry> pNewValue, iteratorT pPos ) + { + PDFContainer* pContainer = nullptr; + const char* pMsg = nullptr; + if( ! m_aObjectStack.empty() ) + { + pContainer = dynamic_cast<PDFContainer*>(m_aObjectStack.back()); + if (pContainer) + { + if( dynamic_cast<PDFDict*>(pContainer) == nullptr && + dynamic_cast<PDFArray*>(pContainer) == nullptr ) + { + PDFObject* pObj = dynamic_cast<PDFObject*>(pContainer); + if( pObj ) + { + if( pObj->m_pObject == nullptr ) + pObj->m_pObject = pNewValue.get(); + else + { + pMsg = "second value for object"; + pContainer = nullptr; + } + } + else if( dynamic_cast<PDFDict*>(pNewValue.get()) ) + { + PDFTrailer* pTrailer = dynamic_cast<PDFTrailer*>(pContainer); + if( pTrailer ) + { + if( pTrailer->m_pDict == nullptr ) + pTrailer->m_pDict = dynamic_cast<PDFDict*>(pNewValue.get()); + else + pContainer = nullptr; + } + else + pContainer = nullptr; + } + else + pContainer = nullptr; + } + } + } + if( pContainer ) + pContainer->m_aSubElements.emplace_back( std::move(pNewValue) ); + else + { + if( ! pMsg ) + { + if( dynamic_cast<PDFContainer*>(pNewValue.get()) ) + pMsg = "array without container"; + else + pMsg = "value without container"; + } + parseError( pMsg, pPos ); + } + } + + void pushName( iteratorT first, iteratorT last ) + { + insertNewValue( std::make_unique<PDFName>(iteratorToString(first,last)), first ); + } + + void pushDouble( iteratorT first, SAL_UNUSED_PARAMETER iteratorT /*last*/ ) + { + insertNewValue( std::make_unique<PDFNumber>(m_fDouble), first ); + } + + void pushString( iteratorT first, iteratorT last ) + { + insertNewValue( std::make_unique<PDFString>(iteratorToString(first,last)), first ); + } + + void pushBool( iteratorT first, iteratorT last ) + { + insertNewValue( std::make_unique<PDFBool>( last-first == 4 ), first ); + } + + void pushNull( iteratorT first, SAL_UNUSED_PARAMETER iteratorT ) + { + insertNewValue( std::make_unique<PDFNull>(), first ); + } + + + void beginObject( iteratorT first, SAL_UNUSED_PARAMETER iteratorT /*last*/ ) + { + if( m_aObjectStack.empty() ) + m_aObjectStack.push_back( new PDFPart() ); + + unsigned int nGeneration = m_aUIntStack.back(); + m_aUIntStack.pop_back(); + unsigned int nObject = m_aUIntStack.back(); + m_aUIntStack.pop_back(); + + PDFObject* pObj = new PDFObject( nObject, nGeneration ); + pObj->m_nOffset = first - m_aGlobalBegin; + + PDFContainer* pContainer = dynamic_cast<PDFContainer*>(m_aObjectStack.back()); + if( pContainer && + ( dynamic_cast<PDFFile*>(pContainer) || + dynamic_cast<PDFPart*>(pContainer) ) ) + { + pContainer->m_aSubElements.emplace_back( pObj ); + m_aObjectStack.push_back( pObj ); + } + else + parseError( "object in wrong place", first ); + } + + void endObject( iteratorT first, SAL_UNUSED_PARAMETER iteratorT ) + { + if( m_aObjectStack.empty() ) + parseError( "endobj without obj", first ); + else if( dynamic_cast<PDFObject*>(m_aObjectStack.back()) == nullptr ) + parseError( "spurious endobj", first ); + else + m_aObjectStack.pop_back(); + } + + void pushObjectRef( iteratorT first, SAL_UNUSED_PARAMETER iteratorT ) + { + unsigned int nGeneration = m_aUIntStack.back(); + m_aUIntStack.pop_back(); + unsigned int nObject = m_aUIntStack.back(); + m_aUIntStack.pop_back(); + insertNewValue( std::make_unique<PDFObjectRef>(nObject,nGeneration), first ); + } + + void beginDict( iteratorT first, SAL_UNUSED_PARAMETER iteratorT ) + { + PDFDict* pDict = new PDFDict(); + pDict->m_nOffset = first - m_aGlobalBegin; + + insertNewValue( std::unique_ptr<PDFEntry>(pDict), first ); + // will not come here if insertion fails (exception) + m_aObjectStack.push_back( pDict ); + } + void endDict( iteratorT first, SAL_UNUSED_PARAMETER iteratorT ) + { + PDFDict* pDict = nullptr; + if( m_aObjectStack.empty() ) + parseError( "dictionary end without begin", first ); + else if( (pDict = dynamic_cast<PDFDict*>(m_aObjectStack.back())) == nullptr ) + parseError( "spurious dictionary end", first ); + else + m_aObjectStack.pop_back(); + + PDFEntry* pOffender = pDict->buildMap(); + if( pOffender ) + { + StringEmitContext aCtx; + aCtx.write( "offending dictionary element: ", 30 ); + pOffender->emit( aCtx ); + m_aErrorString = aCtx.getString(); + parseError( m_aErrorString.getStr(), first ); + } + } + + void beginArray( iteratorT first, SAL_UNUSED_PARAMETER iteratorT ) + { + PDFArray* pArray = new PDFArray(); + pArray->m_nOffset = first - m_aGlobalBegin; + + insertNewValue( std::unique_ptr<PDFEntry>(pArray), first ); + // will not come here if insertion fails (exception) + m_aObjectStack.push_back( pArray ); + } + + void endArray( iteratorT first, SAL_UNUSED_PARAMETER iteratorT ) + { + if( m_aObjectStack.empty() ) + parseError( "array end without begin", first ); + else if( dynamic_cast<PDFArray*>(m_aObjectStack.back()) == nullptr ) + parseError( "spurious array end", first ); + else + m_aObjectStack.pop_back(); + } + + void emitStream( iteratorT first, iteratorT last ) + { + if( m_aObjectStack.empty() ) + parseError( "stream without object", first ); + PDFObject* pObj = dynamic_cast<PDFObject*>(m_aObjectStack.back()); + if( pObj && pObj->m_pObject ) + { + if( pObj->m_pStream ) + parseError( "multiple streams in object", first ); + + PDFDict* pDict = dynamic_cast<PDFDict*>(pObj->m_pObject); + if( pDict ) + { + PDFStream* pStream = new PDFStream( first - m_aGlobalBegin, last - m_aGlobalBegin, pDict ); + + pObj->m_pStream = pStream; + pObj->m_aSubElements.emplace_back( pStream ); + } + } + else + parseError( "stream without object", first ); + } + + void beginTrailer( iteratorT first, SAL_UNUSED_PARAMETER iteratorT ) + { + if( m_aObjectStack.empty() ) + m_aObjectStack.push_back( new PDFPart() ); + + PDFTrailer* pTrailer = new PDFTrailer(); + pTrailer->m_nOffset = first - m_aGlobalBegin; + + PDFContainer* pContainer = dynamic_cast<PDFContainer*>(m_aObjectStack.back()); + if( pContainer && + ( dynamic_cast<PDFFile*>(pContainer) || + dynamic_cast<PDFPart*>(pContainer) ) ) + { + pContainer->m_aSubElements.emplace_back( pTrailer ); + m_aObjectStack.push_back( pTrailer ); + } + else + parseError( "trailer in wrong place", first ); + } + + void endTrailer( iteratorT first, SAL_UNUSED_PARAMETER iteratorT ) + { + if( m_aObjectStack.empty() ) + parseError( "%%EOF without trailer", first ); + else if( dynamic_cast<PDFTrailer*>(m_aObjectStack.back()) == nullptr ) + parseError( "spurious %%EOF", first ); + else + m_aObjectStack.pop_back(); + } +}; + +} + +#ifdef _WIN32 +std::unique_ptr<PDFEntry> PDFReader::read( const char* pBuffer, unsigned int nLen ) +{ + PDFGrammar<const char*> aGrammar( pBuffer ); + + try + { +#if OSL_DEBUG_LEVEL > 0 + boost::spirit::classic::parse_info<const char*> aInfo = +#endif + boost::spirit::classic::parse( pBuffer, + pBuffer+nLen, + aGrammar, + boost::spirit::classic::space_p ); +#if OSL_DEBUG_LEVEL > 0 + SAL_INFO("sdext.pdfimport.pdfparse", "parseinfo: stop = " << aInfo.stop << " (buff=" << pBuffer << ", offset = " << aInfo.stop - pBuffer << "), hit = " << (aInfo.hit ? OUString("true") : OUString("false")) << ", full = " << (aInfo.full ? OUString("true") : OUString("false")) << ", length = " << static_cast<int>(aInfo.length) ); +#endif + } + catch( const parser_error<const char*, const char*>& rError ) + { +#if OSL_DEBUG_LEVEL > 0 + OString aTmp; + unsigned int nElem = aGrammar.m_aObjectStack.size(); + for( unsigned int i = 0; i < nElem; i++ ) + aTmp += OString::Concat(" ") + typeid( *(aGrammar.m_aObjectStack[i]) ).name(); + + SAL_WARN("sdext.pdfimport.pdfparse", "parse error: " << rError.descriptor << " at buffer pos " << rError.where - pBuffer << ", object stack: " << aTmp); +#else + (void)rError; +#endif + } + + std::unique_ptr<PDFEntry> pRet; + unsigned int nEntries = aGrammar.m_aObjectStack.size(); + if( nEntries == 1 ) + { + pRet.reset(aGrammar.m_aObjectStack.back()); + aGrammar.m_aObjectStack.pop_back(); + } +#if OSL_DEBUG_LEVEL > 0 + else if( nEntries > 1 ) + SAL_WARN("sdext.pdfimport.pdfparse", "error got " << nEntries << " stack objects in parse" ); +#endif + + return pRet; +} +#endif + +std::unique_ptr<PDFEntry> PDFReader::read( const char* pFileName ) +{ +#ifdef _WIN32 + /* #i106583# + since converting to boost 1.39 file_iterator does not work anymore on all Windows systems + C++ stdlib istream_iterator does not allow "-" apparently + using spirit 2.0 doesn't work in our environment with the MSC + + So for the time being bite the bullet and read the whole file. + FIXME: give Spirit 2.x another try when we upgrade boost again. + */ + std::unique_ptr<PDFEntry> pRet; + FILE* fp = fopen( pFileName, "rb" ); + if( fp ) + { + fseek( fp, 0, SEEK_END ); + unsigned int nLen = static_cast<unsigned int>(ftell( fp )); + fseek( fp, 0, SEEK_SET ); + char* pBuf = static_cast<char*>(std::malloc( nLen )); + if( pBuf ) + { + fread( pBuf, 1, nLen, fp ); + pRet = read( pBuf, nLen ); + std::free( pBuf ); + } + fclose( fp ); + } + return pRet; +#else + file_iterator<> file_start( pFileName ); + if( ! file_start ) + return nullptr; + file_iterator<> file_end = file_start.make_end(); + PDFGrammar< file_iterator<> > aGrammar( file_start ); + + try + { +#if OSL_DEBUG_LEVEL > 0 + boost::spirit::classic::parse_info< file_iterator<> > aInfo = +#endif + boost::spirit::classic::parse( file_start, + file_end, + aGrammar, + boost::spirit::classic::space_p ); +#if OSL_DEBUG_LEVEL > 0 + SAL_INFO("sdext.pdfimport.pdfparse", "parseinfo: stop at offset = " << aInfo.stop - file_start << ", hit = " << (aInfo.hit ? "true" : "false") << ", full = " << (aInfo.full ? "true" : "false") << ", length = " << aInfo.length); +#endif + } + catch( const parser_error< const char*, file_iterator<> >& rError ) + { + SAL_WARN("sdext.pdfimport.pdfparse", "parse error: " << rError.descriptor << " at buffer pos " << rError.where - file_start); +#if OSL_DEBUG_LEVEL > 0 + OUStringBuffer aTmp; + unsigned int nElem = aGrammar.m_aObjectStack.size(); + for( unsigned int i = 0; i < nElem; i++ ) + { + aTmp.append(" "); + aTmp.appendAscii(typeid( *(aGrammar.m_aObjectStack[i]) ).name()); + } + SAL_WARN("sdext.pdfimport.pdfparse", "parse error object stack: " << aTmp.makeStringAndClear()); +#endif + } + + std::unique_ptr<PDFEntry> pRet; + unsigned int nEntries = aGrammar.m_aObjectStack.size(); + if( nEntries == 1 ) + { + pRet.reset(aGrammar.m_aObjectStack.back()); + aGrammar.m_aObjectStack.pop_back(); + } +#if OSL_DEBUG_LEVEL > 0 + else if( nEntries > 1 ) + { + SAL_WARN("sdext.pdfimport.pdfparse", "error got " << nEntries << " stack objects in parse"); + for( unsigned int i = 0; i < nEntries; i++ ) + { + SAL_WARN("sdext.pdfimport.pdfparse", typeid(*aGrammar.m_aObjectStack[i]).name()); + PDFObject* pObj = dynamic_cast<PDFObject*>(aGrammar.m_aObjectStack[i]); + if( pObj ) + SAL_WARN("sdext.pdfimport.pdfparse", " -> object " << pObj->m_nNumber << " generation " << pObj->m_nGeneration); + else + SAL_WARN("sdext.pdfimport.pdfparse", "(type " << typeid(*aGrammar.m_aObjectStack[i]).name() << ")"); + } + } +#endif + return pRet; +#endif // WIN32 +} + +#if defined(_MSC_VER) +#pragma warning(pop) +#endif + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |