summaryrefslogtreecommitdiffstats
path: root/sdext/source/pdfimport/pdfparse/pdfentries.cxx
diff options
context:
space:
mode:
Diffstat (limited to 'sdext/source/pdfimport/pdfparse/pdfentries.cxx')
-rw-r--r--sdext/source/pdfimport/pdfparse/pdfentries.cxx1461
1 files changed, 1461 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: */