diff options
Diffstat (limited to 'sdext/source/pdfimport/pdfparse/pdfentries.cxx')
| -rw-r--r-- | sdext/source/pdfimport/pdfparse/pdfentries.cxx | 1487 |
1 files changed, 1487 insertions, 0 deletions
diff --git a/sdext/source/pdfimport/pdfparse/pdfentries.cxx b/sdext/source/pdfimport/pdfparse/pdfentries.cxx new file mode 100644 index 000000000000..c286b44fe329 --- /dev/null +++ b/sdext/source/pdfimport/pdfparse/pdfentries.cxx @@ -0,0 +1,1487 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2000, 2010 Oracle and/or its affiliates. + * + * OpenOffice.org - a multi-platform office productivity suite + * + * This file is part of OpenOffice.org. + * + * OpenOffice.org is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 3 + * only, as published by the Free Software Foundation. + * + * OpenOffice.org 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 version 3 for more details + * (a copy is included in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU Lesser General Public License + * version 3 along with OpenOffice.org. If not, see + * <http://www.openoffice.org/license.html> + * for a copy of the LGPLv3 License. + * + ************************************************************************/ + +// MARKER(update_precomp.py): autogen include statement, do not remove +#include "precompiled_sdext.hxx" + +#include <pdfparse.hxx> + +#include <rtl/strbuf.hxx> +#include <rtl/ustring.hxx> +#include <rtl/ustrbuf.hxx> +#include <rtl/alloc.h> +#include <rtl/digest.h> +#include <rtl/cipher.h> +#include <rtl/memory.h> +#ifdef SYSTEM_ZLIB +#include "zlib.h" +#else +#include <zlib/zlib.h> +#endif + +#include <math.h> +#include <map> + +#include <stdio.h> + +using ::rtl::OUString; +using ::rtl::OString; +using ::rtl::OStringHash; +using ::rtl::OStringBuffer; + + +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; + } + + EmitImplData( const PDFContainer* pTopContainer ) : + m_pObjectContainer( pTopContainer ), + m_nDecryptObject( 0 ), + m_nDecryptGeneration( 0 ) + {} + ~EmitImplData() {} + bool 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); + return pFile ? pFile->decrypt( pInBuffer, nLen, pOutBuffer, nObject, nGeneration ) : false; + } + + 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 ), + m_pImplData( NULL ) +{ + if( pTop ) + m_pImplData = new EmitImplData( pTop ); +} + +EmitContext::~EmitContext() +{ + delete m_pImplData; +} + +PDFEntry::~PDFEntry() +{ +} + +EmitImplData* PDFEntry::getEmitData( EmitContext& rContext ) const +{ + return rContext.m_pImplData; +} + +void PDFEntry::setEmitData( EmitContext& rContext, EmitImplData* pNewEmitData ) const +{ + if( rContext.m_pImplData && rContext.m_pImplData != pNewEmitData ) + delete rContext.m_pImplData; + rContext.m_pImplData = 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 sal_Char* pStr = m_aName.getStr(); + unsigned int nLen = m_aName.getLength(); + for( unsigned int i = 0; i < nLen; i++ ) + { + if( pStr[i] == '#' && i < nLen - 3 ) + { + sal_Char rResult = 0; + i++; + if( pStr[i] >= '0' && pStr[i] <= '9' ) + rResult = sal_Char( pStr[i]-'0' ) << 4; + else if( pStr[i] >= 'a' && pStr[i] <= 'f' ) + rResult = sal_Char( pStr[i]-'a' + 10 ) << 4; + else if( pStr[i] >= 'A' && pStr[i] <= 'F' ) + rResult = sal_Char( pStr[i]-'A' + 10 ) << 4; + i++; + if( pStr[i] >= '0' && pStr[i] <= '9' ) + rResult |= sal_Char( pStr[i]-'0' ); + else if( pStr[i] >= 'a' && pStr[i] <= 'f' ) + rResult |= sal_Char( pStr[i]-'a' + 10 ); + else if( pStr[i] >= 'A' && pStr[i] <= 'F' ) + rResult |= sal_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( (sal_uInt8*)aFiltered.getStr(), aFiltered.getLength(), + (sal_uInt8*)aFiltered.getStr(), + pEData->m_nDecryptObject, pEData->m_nDecryptGeneration ); + // check for string or hex string + const sal_Char* pStr = aFiltered.getStr(); + if( aFiltered.getLength() > 1 && + ( (pStr[0] == sal_Char(0xff) && pStr[1] == sal_Char(0xfe)) || + (pStr[0] == sal_Char(0xfe) && pStr[1] == sal_Char(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 sal_Char* pStr = m_aString.getStr(); + if( *pStr == '(' ) + { + const sal_Char* pRun = pStr+1; + while( pRun - pStr < nLen-1 ) + { + if( *pRun == '\\' ) + { + pRun++; + if( pRun - pStr < nLen ) + { + sal_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 sal_Char* pRun = pStr+1; + while( *pRun != '>' && pRun - pStr < nLen ) + { + sal_Char rResult = 0; + if( *pRun >= '0' && *pRun <= '9' ) + rResult = sal_Char( *pRun-'0' ) << 4; + else if( *pRun >= 'a' && *pRun <= 'f' ) + rResult = sal_Char( *pRun-'a' + 10 ) << 4; + else if( *pRun >= 'A' && *pRun <= 'F' ) + rResult = sal_Char( *pRun-'A' + 10 ) << 4; + pRun++; + if( *pRun != '>' && pRun - pStr < nLen ) + { + if( *pRun >= '0' && *pRun <= '9' ) + rResult |= sal_Char( *pRun-'0' ); + else if( *pRun >= 'a' && *pRun <= 'f' ) + rResult |= sal_Char( *pRun-'a' + 10 ); + else if( *pRun >= 'A' && *pRun <= 'F' ) + rResult |= sal_Char( *pRun-'A' + 10 ); + } + pRun++; + aBuf.append( rResult ); + } + } + + return aBuf.makeStringAndClear(); +} + +PDFNumber::~PDFNumber() +{ +} + +bool PDFNumber::emit( EmitContext& rWriteContext ) const +{ + rtl::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 = (sal_Int64)fValue; + fValue -= (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, (double)nPrecision ); + nFrac = (sal_Int64)fValue; + } + if( bNeg && ( nInt || nFrac ) ) + aBuf.append( '-' ); + aBuf.append( nInt ); + if( nFrac ) + { + int i; + aBuf.append( '.' ); + sal_Int64 nBound = (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 +{ + OStringBuffer aBuf( 16 ); + aBuf.append( ' ' ); + aBuf.append( sal_Int32( m_nNumber ) ); + aBuf.append( ' ' ); + aBuf.append( sal_Int32( m_nGeneration ) ); + aBuf.append( " R", 2 ); + return rWriteContext.write( aBuf.getStr(), aBuf.getLength() ); +} + +PDFEntry* PDFObjectRef::clone() const +{ + return new PDFObjectRef( m_nNumber, m_nGeneration ); +} + +PDFContainer::~PDFContainer() +{ + int nEle = m_aSubElements.size(); + for( int i = 0; i < nEle; i++ ) + delete m_aSubElements[i]; +} + +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]); + if (pName && pName->m_aName.equalsL(RTL_CONSTASCII_STRINGPARAM("Encrypt"))) + { + i++; + continue; + } + } + if( ! m_aSubElements[i]->emit( rWriteContext ) ) + return false; + } + return true; +} + +void PDFContainer::cloneSubElements( std::vector<PDFEntry*>& rNewSubElements ) const +{ + int nEle = m_aSubElements.size(); + for( int i = 0; i < nEle; i++ ) + rNewSubElements.push_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]); + if( pObject && + pObject->m_nNumber == nNumber && + pObject->m_nGeneration == nGeneration ) + { + return pObject; + } + } + return NULL; +} + +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, PDFEntry* pValue ) +{ + if( ! pValue ) + eraseValue( rName ); + + boost::unordered_map<OString,PDFEntry*,OStringHash>::iterator it = m_aMap.find( rName ); + if( it == m_aMap.end() ) + { + // new name/value, pair, append it + m_aSubElements.push_back( new PDFName( rName ) ); + m_aSubElements.push_back( pValue ); + } + else + { + unsigned int nSub = m_aSubElements.size(); + for( unsigned int i = 0; i < nSub; i++ ) + if( m_aSubElements[i] == it->second ) + m_aSubElements[i] = pValue; + delete it->second; + } + m_aMap[ rName ] = pValue; +} + +void PDFDict::eraseValue( const OString& rName ) +{ + unsigned int nEle = m_aSubElements.size(); + for( unsigned int i = 0; i < nEle; i++ ) + { + PDFName* pName = dynamic_cast<PDFName*>(m_aSubElements[i]); + if( pName && pName->m_aName.equals( rName ) ) + { + for( unsigned int j = i+1; j < nEle; j++ ) + { + if( dynamic_cast<PDFComment*>(m_aSubElements[j]) == NULL ) + { + // free name and value + delete m_aSubElements[j]; + delete m_aSubElements[i]; + // remove 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 = NULL; + for( unsigned int i = 0; i < nEle; i++ ) + { + if( dynamic_cast<PDFComment*>(m_aSubElements[i]) == NULL ) + { + if( pName ) + { + m_aMap[ pName->m_aName ] = m_aSubElements[i]; + pName = NULL; + } + else if( (pName = dynamic_cast<PDFName*>(m_aSubElements[i])) == NULL ) + return m_aSubElements[i]; + } + } + 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, NULL ); +} + +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 + boost::unordered_map<OString,PDFEntry*,OStringHash>::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 && ! pNum; i++ ) + { + PDFObject* pObj = dynamic_cast<PDFObject*>(pContainer->m_aSubElements[i]); + 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( char** ppStream, 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; + *ppStream = static_cast<char*>(rtl_allocateMemory( nOuterStreamLen )); + if( ! ppStream ) + { + *pBytes = 0; + return false; + } + unsigned int nRead = rContext.readOrigBytes( m_pStream->m_nBeginOffset, nOuterStreamLen, *ppStream ); + if( nRead != nOuterStreamLen ) + { + rtl_freeMemory( *ppStream ); + *ppStream = NULL; + *pBytes = 0; + return false; + } + // is there a filter entry ? + boost::unordered_map<OString,PDFEntry*,OStringHash>::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()); + } + } + + // is the (first) filter FlateDecode ? + if (pFilter && pFilter->m_aName.equalsL(RTL_CONSTASCII_STRINGPARAM("FlateDecode"))) + { + bIsDeflated = true; + } + } + // prepare compressed data section + char* pStream = *ppStream; + 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 != *ppStream ) + rtl_moveMemory( *ppStream, pStream, *pBytes ); + if( rContext.m_bDecrypt ) + { + EmitImplData* pEData = getEmitData( rContext ); + pEData->decrypt( reinterpret_cast<const sal_uInt8*>(*ppStream), + *pBytes, + reinterpret_cast<sal_uInt8*>(*ppStream), + m_nNumber, + m_nGeneration + ); // decrypt inplace + } + } + else + *ppStream = NULL, *pBytes = 0; + return bIsDeflated; +} + +static void unzipToBuffer( const char* pBegin, unsigned int nLen, + sal_uInt8** pOutBuf, sal_uInt32* pOutLen ) +{ + z_stream aZStr; + aZStr.next_in = (Bytef*)pBegin; + aZStr.avail_in = nLen; + aZStr.zalloc = ( alloc_func )0; + aZStr.zfree = ( free_func )0; + aZStr.opaque = ( voidpf )0; + inflateInit(&aZStr); + + const unsigned int buf_increment_size = 16384; + + *pOutBuf = (sal_uInt8*)rtl_reallocateMemory( *pOutBuf, buf_increment_size ); + aZStr.next_out = (Bytef*)*pOutBuf; + aZStr.avail_out = buf_increment_size; + int err = Z_OK; + *pOutLen = buf_increment_size; + 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; + *pOutBuf = (sal_uInt8*)rtl_reallocateMemory( *pOutBuf, nNewAlloc ); + aZStr.next_out = (Bytef*)(*pOutBuf + *pOutLen); + aZStr.avail_out = buf_increment_size; + *pOutLen = nNewAlloc; + } + } + } + if( err == Z_STREAM_END ) + { + if( aZStr.avail_out > 0 ) + *pOutLen -= aZStr.avail_out;; + } + inflateEnd(&aZStr); + if( err < Z_OK ) + { + rtl_freeMemory( *pOutBuf ); + *pOutBuf = NULL; + *pOutLen = 0; + } +} + +bool PDFObject::writeStream( EmitContext& rWriteContext, const PDFFile* pParsedFile ) const +{ + bool bSuccess = false; + if( m_pStream ) + { + char* pStream = NULL; + unsigned int nBytes = 0; + if( getDeflatedStream( &pStream, &nBytes, pParsedFile, rWriteContext ) && nBytes && rWriteContext.m_bDeflate ) + { + sal_uInt8* pOutBytes = NULL; + sal_uInt32 nOutBytes = 0; + unzipToBuffer( pStream, nBytes, &pOutBytes, &nOutBytes ); + rWriteContext.write( pOutBytes, nOutBytes ); + rtl_freeMemory( pOutBytes ); + } + else if( pStream && nBytes ) + rWriteContext.write( pStream, nBytes ); + rtl_freeMemory( pStream ); + } + return bSuccess; +} + +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() ); + + OStringBuffer aBuf( 32 ); + aBuf.append( sal_Int32( m_nNumber ) ); + aBuf.append( ' ' ); + aBuf.append( sal_Int32( m_nGeneration ) ); + aBuf.append( " 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 ) + { + char* pStream = NULL; + unsigned int nBytes = 0; + bool bDeflate = getDeflatedStream( &pStream, &nBytes, pEData->m_pObjectContainer, rWriteContext ); + if( pStream && nBytes ) + { + // unzip the stream + sal_uInt8* pOutBytes = NULL; + sal_uInt32 nOutBytes = 0; + if( bDeflate && rWriteContext.m_bDeflate ) + unzipToBuffer( pStream, nBytes, &pOutBytes, &nOutBytes ); + else + { + // nothing to deflate, but decryption has happened + pOutBytes = (sal_uInt8*)pStream; + nOutBytes = (sal_uInt32)nBytes; + } + + if( nOutBytes ) + { + // clone this object + PDFObject* pClone = static_cast<PDFObject*>(clone()); + // set length in the dictionary to new stream length + PDFNumber* pNewLen = new PDFNumber( double(nOutBytes) ); + pClone->m_pStream->m_pDict->insertValue( "Length", pNewLen ); + + if( bDeflate && rWriteContext.m_bDeflate ) + { + // delete flatedecode filter + boost::unordered_map<OString,PDFEntry*,OStringHash>::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.equalsL(RTL_CONSTASCII_STRINGPARAM("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()); + if (pFilter && pFilter->m_aName.equalsL(RTL_CONSTASCII_STRINGPARAM("FlateDecode"))) + { + delete pFilter; + 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] != pClone->m_pStream ) + bRet = pClone->m_aSubElements[i]->emit( rWriteContext ); + } + delete pClone; + // write stream + if( bRet ) + rWriteContext.write( "stream\n", 7 ); + if( bRet ) + bRet = rWriteContext.write( pOutBytes, nOutBytes ); + if( bRet ) + bRet = rWriteContext.write( "\nendstream\nendobj\n", 18 ); + rtl_freeMemory( pStream ); + if( pOutBytes != (sal_uInt8*)pStream ) + rtl_freeMemory( pOutBytes ); + if( pEData ) + pEData->setDecryptObject( 0, 0 ); + return bRet; + } + if( pOutBytes != (sal_uInt8*)pStream ) + rtl_freeMemory( pOutBytes ); + } + rtl_freeMemory( pStream ); + } + + 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] == m_pObject ) + pNewOb->m_pObject = pNewOb->m_aSubElements[i]; + else if( m_aSubElements[i] == m_pStream && pNewOb->m_pObject ) + { + pNewOb->m_pStream = dynamic_cast<PDFStream*>(pNewOb->m_aSubElements[i]); + PDFDict* pNewDict = dynamic_cast<PDFDict*>(pNewOb->m_pObject); + if( pNewDict ) + 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::valueOf( sal_Int64(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::valueOf( sal_Int32(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; + rtl::OString aOffset( rtl::OString::valueOf( sal_Int32(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] == m_pDict ) + { + pNewTr->m_pDict = dynamic_cast<PDFDict*>(pNewTr->m_aSubElements[i]); + 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; + rtlDigest m_aDigest; + + 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( NULL ), + m_aDigest( NULL ) + { + rtl_zeroMemory( m_aOEntry, sizeof( m_aOEntry ) ); + rtl_zeroMemory( m_aUEntry, sizeof( m_aUEntry ) ); + rtl_zeroMemory( m_aDecryptionKey, sizeof( m_aDecryptionKey ) ); + } + + ~PDFFileImplData() + { + if( m_aCipher ) + rtl_cipher_destroyARCFOUR( m_aCipher ); + if( m_aDigest ) + rtl_digest_destroyMD5( m_aDigest ); + } +}; +} + +PDFFile::~PDFFile() +{ + if( m_pData ) + delete m_pData; +} + +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); + + sal_uInt8 aSum[ENCRYPTION_KEY_LEN]; + rtl_digest_updateMD5( m_pData->m_aDigest, m_pData->m_aDecryptionKey, i ); + rtl_digest_getMD5( m_pData->m_aDigest, aSum, sizeof( aSum ) ); + + if( i > 16 ) + i = 16; + + rtlCipherError aErr = rtl_cipher_initARCFOUR( m_pData->m_aCipher, + rtl_Cipher_DirectionDecode, + aSum, i, + NULL, 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; +} + +static 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, sal_Char* pBuffer ) +{ + int nLen = rStr.getLength(); + if( nLen > 32 ) + nLen = 32; + const sal_Char* pStr = rStr.getStr(); + rtl_copyMemory( 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* pData, bool bComputeO ) +{ + // see PDF reference 1.4 Algorithm 3.2 + // encrypt pad string + sal_Char aPadPwd[ENCRYPTION_BUF_LEN]; + pad_or_truncate_to_32( rPwd, aPadPwd ); + rtl_digest_updateMD5( pData->m_aDigest, aPadPwd, sizeof( aPadPwd ) ); + if( ! bComputeO ) + { + rtl_digest_updateMD5( pData->m_aDigest, 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); + rtl_digest_updateMD5( pData->m_aDigest, aPEntry, sizeof(aPEntry) ); + rtl_digest_updateMD5( pData->m_aDigest, pData->m_aDocID.getStr(), pData->m_aDocID.getLength() ); + } + sal_uInt8 nSum[RTL_DIGEST_LENGTH_MD5]; + rtl_digest_getMD5( pData->m_aDigest, nSum, sizeof(nSum) ); + if( pData->m_nStandardRevision == 3 ) + { + for( int i = 0; i < 50; i++ ) + { + rtl_digest_updateMD5( pData->m_aDigest, nSum, sizeof(nSum) ); + rtl_digest_getMD5( pData->m_aDigest, nSum, sizeof(nSum) ); + } + } + sal_uInt32 nLen = pData->m_nKeyLength; + if( nLen > RTL_DIGEST_LENGTH_MD5 ) + nLen = RTL_DIGEST_LENGTH_MD5; + rtl_copyMemory( pOutKey, nSum, 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_uInt8 nEncryptedEntry[ENCRYPTION_BUF_LEN]; + rtl_zeroMemory( nEncryptedEntry, sizeof(nEncryptedEntry) ); + sal_uInt32 nKeyLen = password_to_key( rPwd, aKey, pData, false ); + // save (at this time potential) decryption key for later use + rtl_copyMemory( pData->m_aDecryptionKey, aKey, nKeyLen ); + if( pData->m_nStandardRevision == 2 ) + { + // see PDF reference 1.4 Algorithm 3.4 + // encrypt pad string + rtl_cipher_initARCFOUR( pData->m_aCipher, rtl_Cipher_DirectionEncode, + aKey, nKeyLen, + NULL, 0 ); + rtl_cipher_encodeARCFOUR( pData->m_aCipher, nPadString, sizeof( nPadString ), + nEncryptedEntry, sizeof( nEncryptedEntry ) ); + bValid = (rtl_compareMemory( nEncryptedEntry, pData->m_aUEntry, 32 ) == 0); + } + else if( pData->m_nStandardRevision == 3 ) + { + // see PDF reference 1.4 Algorithm 3.5 + rtl_digest_updateMD5( pData->m_aDigest, nPadString, sizeof( nPadString ) ); + rtl_digest_updateMD5( pData->m_aDigest, pData->m_aDocID.getStr(), pData->m_aDocID.getLength() ); + rtl_digest_getMD5( pData->m_aDigest, nEncryptedEntry, sizeof(nEncryptedEntry) ); + rtl_cipher_initARCFOUR( pData->m_aCipher, rtl_Cipher_DirectionEncode, + aKey, sizeof(aKey), NULL, 0 ); + rtl_cipher_encodeARCFOUR( pData->m_aCipher, + nEncryptedEntry, 16, + nEncryptedEntry, 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( sal_uInt32 j = 0; j < sizeof(aTempKey); j++ ) + aTempKey[j] = static_cast<sal_uInt8>( aKey[j] ^ i ); + + rtl_cipher_initARCFOUR( pData->m_aCipher, rtl_Cipher_DirectionEncode, + aTempKey, sizeof(aTempKey), NULL, 0 ); + rtl_cipher_encodeARCFOUR( pData->m_aCipher, + nEncryptedEntry, 16, + nEncryptedEntry, 16 ); // encrypt in place + } + bValid = (rtl_compareMemory( nEncryptedEntry, pData->m_aUEntry, 16 ) == 0); + } + return bValid; +} + +bool PDFFile::setupDecryptionData( const OString& rPwd ) const +{ + if( !impl_getData()->m_bIsEncrypted ) + return rPwd.getLength() == 0; + + // check if we can handle this encryption at all + if( ! m_pData->m_bStandardHandler || + m_pData->m_nAlgoVersion < 1 || + m_pData->m_nAlgoVersion > 2 || + m_pData->m_nStandardRevision < 2 || + m_pData->m_nStandardRevision > 3 ) + return false; + + if( ! m_pData->m_aCipher ) + m_pData->m_aCipher = rtl_cipher_createARCFOUR(rtl_Cipher_ModeStream); + if( ! m_pData->m_aDigest ) + m_pData->m_aDigest = rtl_digest_createMD5(); + + // first try user password + bool bValid = check_user_password( rPwd, m_pData ); + + 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]; + rtl_zeroMemory( nPwd, sizeof(nPwd) ); + sal_uInt32 nKeyLen = password_to_key( rPwd, aKey, m_pData, true ); + if( m_pData->m_nStandardRevision == 2 ) + { + rtl_cipher_initARCFOUR( m_pData->m_aCipher, rtl_Cipher_DirectionDecode, + aKey, nKeyLen, NULL, 0 ); + rtl_cipher_decodeARCFOUR( m_pData->m_aCipher, + m_pData->m_aOEntry, 32, + nPwd, 32 ); + } + else if( m_pData->m_nStandardRevision == 3 ) + { + rtl_copyMemory( nPwd, m_pData->m_aOEntry, 32 ); + for( int i = 19; i >= 0; i-- ) + { + sal_uInt8 nTempKey[ENCRYPTION_KEY_LEN]; + for( unsigned int j = 0; j < sizeof(nTempKey); j++ ) + nTempKey[j] = sal_uInt8(aKey[j] ^ i); + rtl_cipher_initARCFOUR( m_pData->m_aCipher, rtl_Cipher_DirectionDecode, + nTempKey, nKeyLen, NULL, 0 ); + rtl_cipher_decodeARCFOUR( m_pData->m_aCipher, + nPwd, 32, + nPwd, 32 ); // decrypt inplace + } + } + bValid = check_user_password( OString( (sal_Char*)nPwd, 32 ), m_pData ); + } + + return bValid; +} + +rtl::OUString PDFFile::getDecryptionKey() const +{ + rtl::OUStringBuffer aBuf( ENCRYPTION_KEY_LEN * 2 ); + if( impl_getData()->m_bIsEncrypted ) + { + for( sal_uInt32 i = 0; i < m_pData->m_nKeyLength; i++ ) + { + static const sal_Unicode pHexTab[16] = { '0', '1', '2', '3', '4', '5', '6', '7', + '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' }; + aBuf.append( pHexTab[(m_pData->m_aDecryptionKey[i] >> 4) & 0x0f] ); + aBuf.append( pHexTab[(m_pData->m_aDecryptionKey[i] & 0x0f)] ); + } + + } + return aBuf.makeStringAndClear(); +} + +PDFFileImplData* PDFFile::impl_getData() const +{ + if( m_pData ) + return m_pData; + m_pData = 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]); + 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.size() > 0 ) + { + PDFString* pStr = dynamic_cast<PDFString*>(pArr->m_aSubElements[0]); + if( pStr ) + m_pData->m_aDocID = pStr->getFilteredString(); + #if OSL_DEBUG_LEVEL > 1 + fprintf( stderr, "DocId is <" ); + for( int i = 0; i < m_pData->m_aDocID.getLength(); i++ ) + fprintf( stderr, "%.2x", (unsigned int)sal_uInt8(m_pData->m_aDocID.getStr()[i]) ); + fprintf( stderr, ">\n" ); + #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().equalsAsciiL( RTL_CONSTASCII_STRINGPARAM( "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 ) + rtl_copyMemory( m_pData->m_aOEntry, aEnt.getStr(), 32 ); + #if OSL_DEBUG_LEVEL > 1 + else + { + fprintf( stderr, "O entry has length %d, should be 32 <", (int)aEnt.getLength() ); + for( int i = 0; i < aEnt.getLength(); i++ ) + fprintf( stderr, " %.2X", (unsigned int)sal_uInt8(aEnt.getStr()[i]) ); + fprintf( stderr, ">\n" ); + } + #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 ) + rtl_copyMemory( m_pData->m_aUEntry, aEnt.getStr(), 32 ); + #if OSL_DEBUG_LEVEL > 1 + else + { + fprintf( stderr, "U entry has length %d, should be 32 <", (int)aEnt.getLength() ); + for( int i = 0; i < aEnt.getLength(); i++ ) + fprintf( stderr, " %.2X", (unsigned int)sal_uInt8(aEnt.getStr()[i]) ); + fprintf( stderr, ">\n" ); + } + #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)); + #if OSL_DEBUG_LEVEL > 1 + fprintf( stderr, "p entry is %p\n", (void*)m_pData->m_nPEntry ); + #endif + } + #if OSL_DEBUG_LEVEL > 1 + fprintf( stderr, "Encryption dict: sec handler: %s, version = %d, revision = %d, key length = %d\n", + pFilter ? OUStringToOString( pFilter->getFilteredName(), RTL_TEXTENCODING_UTF8 ).getStr() : "<unknown>", + (int)m_pData->m_nAlgoVersion, (int)m_pData->m_nStandardRevision, (int)m_pData->m_nKeyLength ); + #endif + break; + } + } + } + } + } + + return m_pData; +} + +bool PDFFile::emit( EmitContext& rWriteContext ) const +{ + setEmitData( rWriteContext, new EmitImplData( this ) ); + + OStringBuffer aBuf( 32 ); + aBuf.append( "%PDF-" ); + aBuf.append( sal_Int32( m_nMajor ) ); + aBuf.append( '.' ); + aBuf.append( sal_Int32( m_nMinor ) ); + aBuf.append( "\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: */ |