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+/* -*- 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 <stdio.h>
+#include <string_view>
+
+#include <sal/main.h>
+#include <osl/file.h>
+#include <osl/thread.h>
+#include <rtl/alloc.h>
+#include <rtl/ustring.hxx>
+#include <rtl/strbuf.hxx>
+#include <o3tl/string_view.hxx>
+
+#include <pdfparse.hxx>
+
+using namespace pdfparse;
+
+
+static void printHelp( const char* pExe )
+{
+ fprintf( stdout,
+ "USAGE: %s [-h,--help]\n"
+ " %s [-pw, --password <password>] <inputfile> [<outputfile>]\n"
+ " %s <-a, --extract-add-streams> [-pw, --password <password>] <inputfile> [<outputfile>]\n"
+ " %s <-f, --extract-fonts> [-pw, --password <password>] <inputfile> [<outputfile>]\n"
+ " %s <-o, --extract-objects> <o0>[:<g0>][,<o1>[:g1][,...]] [-pw, --password <password>] <inputfile> [<outputfile>]\n"
+ " -h, --help: show help\n"
+ " -a, --extract-add-streams: extracts additional streams to outputfile_object\n"
+ " and prints the mimetype found to stdout\n"
+ " -f, --extract-fonts: extracts fonts (currently only type1 and truetype are supported\n"
+ " -o, --extract-objects: extracts object streams, the syntax of the argument is comma separated\n"
+ " object numbers, where object number and generation number are separated by \':\'\n"
+ " an omitted generation number defaults to 0\n"
+ " -pw, --password: use password for decryption\n"
+ "\n"
+ "note: -f, -a, -o and normal unzip operation are mutually exclusive\n"
+ , pExe, pExe, pExe, pExe, pExe );
+}
+
+namespace {
+
+class FileEmitContext : public EmitContext
+{
+ oslFileHandle m_aHandle;
+ oslFileHandle m_aReadHandle;
+ unsigned int m_nReadLen;
+
+ void openReadFile( const char* pOrigName );
+
+ public:
+ FileEmitContext( const char* pFileName, const char* pOrigName, const PDFContainer* pTop );
+ virtual ~FileEmitContext() override;
+
+ virtual bool write( const void* pBuf, unsigned int nLen ) noexcept override;
+ virtual unsigned int getCurPos() noexcept override;
+ virtual bool copyOrigBytes( unsigned int nOrigOffset, unsigned int nLen ) noexcept override;
+ virtual unsigned int readOrigBytes( unsigned int nOrigOffset, unsigned int nLen, void* pBuf ) noexcept override;
+};
+
+}
+
+FileEmitContext::FileEmitContext( const char* pFileName, const char* pOrigName, const PDFContainer* pTop )
+ : EmitContext( pTop ),
+ m_aHandle( nullptr ),
+ m_aReadHandle( nullptr ),
+ m_nReadLen( 0 )
+{
+ OUString aSysFile(
+ OStringToOUString( std::string_view( pFileName ), osl_getThreadTextEncoding() ) );
+ OUString aURL;
+ if( osl_getFileURLFromSystemPath( aSysFile.pData, &aURL.pData ) != osl_File_E_None )
+ {
+ fprintf( stderr, "filename conversion \"%s\" failed\n", pFileName );
+ return;
+ }
+
+ if( osl_openFile( aURL.pData, &m_aHandle, osl_File_OpenFlag_Write ) == osl_File_E_None )
+ {
+ if( osl_setFileSize( m_aHandle, 0 ) != osl_File_E_None )
+ {
+ fprintf( stderr, "could not truncate %s\n", pFileName );
+ osl_closeFile( m_aHandle );
+ m_aHandle = nullptr;
+ }
+ }
+ else if( osl_openFile( aURL.pData, &m_aHandle,
+ osl_File_OpenFlag_Write |osl_File_OpenFlag_Create ) != osl_File_E_None )
+ {
+ fprintf( stderr, "could not open %s\n", pFileName );
+ return;
+ }
+ m_bDeflate = true;
+
+ openReadFile( pOrigName );
+}
+
+FileEmitContext::~FileEmitContext()
+{
+ if( m_aHandle )
+ osl_closeFile( m_aHandle );
+ if( m_aReadHandle )
+ osl_closeFile( m_aReadHandle );
+}
+
+void FileEmitContext::openReadFile( const char* pInFile )
+{
+ OUString aSysFile(
+ OStringToOUString( std::string_view( pInFile ), osl_getThreadTextEncoding() ) );
+ OUString aURL;
+ if( osl_getFileURLFromSystemPath( aSysFile.pData, &aURL.pData ) != osl_File_E_None )
+ {
+ fprintf( stderr, "filename conversion \"%s\" failed\n", pInFile );
+ return;
+ }
+
+ if( osl_openFile( aURL.pData, &m_aReadHandle, osl_File_OpenFlag_Read ) != osl_File_E_None )
+ {
+ fprintf( stderr, "could not open %s\n", pInFile );
+ return;
+ }
+
+ if( osl_setFilePos( m_aReadHandle, osl_Pos_End, 0 ) != osl_File_E_None )
+ {
+ fprintf( stderr, "could not seek to end of %s\n", pInFile );
+ osl_closeFile( m_aReadHandle );
+ return;
+ }
+
+ sal_uInt64 nFileSize = 0;
+ if( osl_getFilePos( m_aReadHandle, &nFileSize ) != osl_File_E_None )
+ {
+ fprintf( stderr, "could not get end pos of %s\n", pInFile );
+ osl_closeFile( m_aReadHandle );
+ return;
+ }
+
+ m_nReadLen = static_cast<unsigned int>(nFileSize);
+}
+
+bool FileEmitContext::write( const void* pBuf, unsigned int nLen ) noexcept
+{
+ if( ! m_aHandle )
+ return false;
+
+ sal_uInt64 nWrite = static_cast<sal_uInt64>(nLen);
+ sal_uInt64 nWritten = 0;
+ return (osl_writeFile( m_aHandle, pBuf, nWrite, &nWritten ) == osl_File_E_None)
+ && nWrite == nWritten;
+}
+
+unsigned int FileEmitContext::getCurPos() noexcept
+{
+ sal_uInt64 nFileSize = 0;
+ if( m_aHandle )
+ {
+ if( osl_getFilePos( m_aHandle, &nFileSize ) != osl_File_E_None )
+ nFileSize = 0;
+ }
+ return static_cast<unsigned int>(nFileSize);
+}
+
+bool FileEmitContext::copyOrigBytes( unsigned int nOrigOffset, unsigned int nLen ) noexcept
+{
+ if( nOrigOffset + nLen > m_nReadLen )
+ return false;
+
+ if( osl_setFilePos( m_aReadHandle, osl_Pos_Absolut, nOrigOffset ) != osl_File_E_None )
+ {
+ fprintf( stderr, "could not seek to offset %u\n", nOrigOffset );
+ return false;
+ }
+ void* pBuf = std::malloc( nLen );
+ if( ! pBuf )
+ return false;
+ sal_uInt64 nBytesRead = 0;
+ if( osl_readFile( m_aReadHandle, pBuf, nLen, &nBytesRead ) != osl_File_E_None
+ || nBytesRead != static_cast<sal_uInt64>(nLen) )
+ {
+ fprintf( stderr, "could not read %u bytes\n", nLen );
+ std::free( pBuf );
+ return false;
+ }
+ bool bRet = write( pBuf, nLen );
+ std::free( pBuf );
+ return bRet;
+}
+
+unsigned int FileEmitContext::readOrigBytes( unsigned int nOrigOffset, unsigned int nLen, void* pBuf ) noexcept
+{
+ if( nOrigOffset + nLen > m_nReadLen )
+ return 0;
+
+ if( osl_setFilePos( m_aReadHandle, osl_Pos_Absolut, nOrigOffset ) != osl_File_E_None )
+ {
+ fprintf( stderr, "could not seek to offset %u\n", nOrigOffset );
+ return 0;
+ }
+ sal_uInt64 nBytesRead = 0;
+ if( osl_readFile( m_aReadHandle, pBuf, nLen, &nBytesRead ) != osl_File_E_None )
+ return 0;
+ return static_cast<unsigned int>(nBytesRead);
+}
+
+typedef int(*PDFFileHdl)(const char*, const char*, PDFFile*);
+
+static int handleFile( const char* pInFile, const char* pOutFile, const char* pPassword, PDFFileHdl pHdl )
+{
+ int nRet = 0;
+ std::unique_ptr<PDFEntry> pEntry = pdfparse::PDFReader::read( pInFile );
+ if( pEntry )
+ {
+ PDFFile* pPDFFile = dynamic_cast<PDFFile*>(pEntry.get());
+ if( pPDFFile )
+ {
+ fprintf( stdout, "have a %s PDF file\n", pPDFFile->isEncrypted() ? "encrypted" : "unencrypted" );
+ if( pPassword )
+ fprintf( stdout, "password %s\n",
+ pPDFFile->setupDecryptionData( pPassword ) ? "matches" : "does not match" );
+ nRet = pHdl( pInFile, pOutFile, pPDFFile );
+ }
+ else
+ nRet = 20;
+ }
+ return nRet;
+}
+
+static int write_unzipFile( const char* pInFile, const char* pOutFile, PDFFile* pPDFFile )
+{
+ FileEmitContext aContext( pOutFile, pInFile, pPDFFile );
+ aContext.m_bDecrypt = pPDFFile->isEncrypted();
+ pPDFFile->emit(aContext);
+ return 0;
+}
+
+static int write_addStreamArray( const char* pOutFile, PDFArray* pStreams, PDFFile* pPDFFile, const char* pInFile )
+{
+ int nRet = 0;
+ unsigned int nArrayElements = pStreams->m_aSubElements.size();
+ for( unsigned int i = 0; i < nArrayElements-1 && nRet == 0; i++ )
+ {
+ PDFName* pMimeType = dynamic_cast<PDFName*>(pStreams->m_aSubElements[i].get());
+ PDFObjectRef* pStreamRef = dynamic_cast<PDFObjectRef*>(pStreams->m_aSubElements[i+1].get());
+ if( ! pMimeType )
+ fprintf( stderr, "error: no mimetype element\n" );
+ if( ! pStreamRef )
+ fprintf( stderr, "error: no stream ref element\n" );
+ if( pMimeType && pStreamRef )
+ {
+ fprintf( stdout, "found stream %d %d with mimetype %s\n",
+ pStreamRef->m_nNumber, pStreamRef->m_nGeneration,
+ pMimeType->m_aName.getStr() );
+ PDFObject* pObject = pPDFFile->findObject( pStreamRef->m_nNumber, pStreamRef->m_nGeneration );
+ if( pObject )
+ {
+ OString aOutStream = pOutFile +
+ OString::Concat("_stream_") +
+ OString::number( sal_Int32(pStreamRef->m_nNumber) ) +
+ "_" +
+ OString::number( sal_Int32(pStreamRef->m_nGeneration) );
+ FileEmitContext aContext( aOutStream.getStr(), pInFile, pPDFFile );
+ aContext.m_bDecrypt = pPDFFile->isEncrypted();
+ pObject->writeStream( aContext, pPDFFile );
+ }
+ else
+ {
+ fprintf( stderr, "object not found\n" );
+ nRet = 121;
+ }
+ }
+ else
+ nRet = 120;
+ }
+ return nRet;
+}
+
+static int write_addStreams( const char* pInFile, const char* pOutFile, PDFFile* pPDFFile )
+{
+ // find all trailers
+ int nRet = 0;
+ unsigned int nElements = pPDFFile->m_aSubElements.size();
+ for( unsigned i = 0; i < nElements && nRet == 0; i++ )
+ {
+ PDFTrailer* pTrailer = dynamic_cast<PDFTrailer*>(pPDFFile->m_aSubElements[i].get());
+ if( pTrailer && pTrailer->m_pDict )
+ {
+ // search for AdditionalStreams entry
+ auto add_stream = pTrailer->m_pDict->m_aMap.find( "AdditionalStreams" );
+ if( add_stream != pTrailer->m_pDict->m_aMap.end() )
+ {
+ PDFArray* pStreams = dynamic_cast<PDFArray*>(add_stream->second);
+ if( pStreams )
+ nRet = write_addStreamArray( pOutFile, pStreams, pPDFFile, pInFile );
+ }
+ }
+ }
+ return nRet;
+}
+
+static int write_fonts( const char* i_pInFile, const char* i_pOutFile, PDFFile* i_pPDFFile )
+{
+ unsigned int nElements = i_pPDFFile->m_aSubElements.size();
+ for (unsigned i = 0; i < nElements; i++)
+ {
+ // search FontDescriptors
+ PDFObject* pObj = dynamic_cast<PDFObject*>(i_pPDFFile->m_aSubElements[i].get());
+ if( ! pObj )
+ continue;
+ PDFDict* pDict = dynamic_cast<PDFDict*>(pObj->m_pObject);
+ if( ! pDict )
+ continue;
+
+ std::unordered_map<OString,PDFEntry*>::iterator map_it =
+ pDict->m_aMap.find( "Type" );
+ if( map_it == pDict->m_aMap.end() )
+ continue;
+
+ PDFName* pName = dynamic_cast<PDFName*>(map_it->second);
+ if( ! pName )
+ continue;
+ if( pName->m_aName != "FontDescriptor" )
+ continue;
+
+ // the font name will be helpful, also there must be one in
+ // a font descriptor
+ map_it = pDict->m_aMap.find( "FontName" );
+ if( map_it == pDict->m_aMap.end() )
+ continue;
+ pName = dynamic_cast<PDFName*>(map_it->second);
+ if( ! pName )
+ continue;
+ OString aFontName( pName->m_aName );
+
+ PDFObjectRef* pStreamRef = nullptr;
+ const char* pFileType = nullptr;
+ // we have a font descriptor, try for a type 1 font
+ map_it = pDict->m_aMap.find( "FontFile" );
+ if( map_it != pDict->m_aMap.end() )
+ {
+ pStreamRef = dynamic_cast<PDFObjectRef*>(map_it->second);
+ if( pStreamRef )
+ pFileType = "pfa";
+ }
+
+ // perhaps it's a truetype file ?
+ if( ! pStreamRef )
+ {
+ map_it = pDict->m_aMap.find( "FontFile2" );
+ if( map_it != pDict->m_aMap.end() )
+ {
+ pStreamRef = dynamic_cast<PDFObjectRef*>(map_it->second);
+ if( pStreamRef )
+ pFileType = "ttf";
+ }
+ }
+
+ if( ! pStreamRef )
+ continue;
+
+ PDFObject* pStream = i_pPDFFile->findObject( pStreamRef );
+ if( ! pStream )
+ continue;
+
+ OStringBuffer aOutStream( i_pOutFile );
+ aOutStream.append( "_font_" );
+ aOutStream.append( sal_Int32(pStreamRef->m_nNumber) );
+ aOutStream.append( "_" );
+ aOutStream.append( sal_Int32(pStreamRef->m_nGeneration) );
+ aOutStream.append( "_" );
+ aOutStream.append( aFontName );
+ if( pFileType )
+ {
+ aOutStream.append( "." );
+ aOutStream.append( pFileType );
+ }
+ FileEmitContext aContext( aOutStream.getStr(), i_pInFile, i_pPDFFile );
+ aContext.m_bDecrypt = i_pPDFFile->isEncrypted();
+ pStream->writeStream( aContext, i_pPDFFile );
+ }
+ return 0;
+}
+
+static std::vector< std::pair< sal_Int32, sal_Int32 > > s_aEmitObjects;
+
+static int write_objects( const char* i_pInFile, const char* i_pOutFile, PDFFile* i_pPDFFile )
+{
+ unsigned int nElements = s_aEmitObjects.size();
+ for (unsigned i = 0; i < nElements; i++)
+ {
+ sal_Int32 nObject = s_aEmitObjects[i].first;
+ sal_Int32 nGeneration = s_aEmitObjects[i].second;
+ PDFObject* pStream = i_pPDFFile->findObject( nObject, nGeneration );
+ if( ! pStream )
+ {
+ fprintf( stderr, "object %d %d not found !\n", static_cast<int>(nObject), static_cast<int>(nGeneration) );
+ continue;
+ }
+
+ OString aOutStream = i_pOutFile +
+ OString::Concat("_stream_") +
+ OString::number( nObject ) +
+ "_" +
+ OString::number( nGeneration );
+ FileEmitContext aContext( aOutStream.getStr(), i_pInFile, i_pPDFFile );
+ aContext.m_bDecrypt = i_pPDFFile->isEncrypted();
+ pStream->writeStream( aContext, i_pPDFFile );
+ }
+ return 0;
+}
+
+SAL_IMPLEMENT_MAIN_WITH_ARGS( argc, argv )
+{
+ const char* pInFile = nullptr;
+ const char* pOutFile = nullptr;
+ const char* pPassword = nullptr;
+ OStringBuffer aOutFile( 256 );
+ PDFFileHdl aHdl = write_unzipFile;
+
+ for( int nArg = 1; nArg < argc; nArg++ )
+ {
+ if( argv[nArg][0] == '-' )
+ {
+ if( ! rtl_str_compare( "-pw", argv[nArg] ) ||
+ ! rtl_str_compare( "--password" , argv[nArg] ) )
+ {
+ if( nArg == argc-1 )
+ {
+ fprintf( stderr, "no password given\n" );
+ return 1;
+ }
+ nArg++;
+ pPassword = argv[nArg];
+ }
+ else if( ! rtl_str_compare( "-h", argv[nArg] ) ||
+ ! rtl_str_compare( "--help", argv[nArg] ) )
+ {
+ printHelp( argv[0] );
+ return 0;
+ }
+ else if( ! rtl_str_compare( "-a", argv[nArg] ) ||
+ ! rtl_str_compare( "--extract-add-streams", argv[nArg] ) )
+ {
+ aHdl = write_addStreams;
+ }
+ else if( ! rtl_str_compare( "-f", argv[nArg] ) ||
+ ! rtl_str_compare( "--extract-fonts", argv[nArg] ) )
+ {
+ aHdl = write_fonts;
+ }
+ else if( ! rtl_str_compare( "-o", argv[nArg] ) ||
+ ! rtl_str_compare( "--extract-objects", argv[nArg] ) )
+ {
+ aHdl = write_objects;
+ nArg++;
+ if( nArg < argc )
+ {
+ OString aObjs( argv[nArg] );
+ sal_Int32 nIndex = 0;
+ while( nIndex != -1 )
+ {
+ OString aToken( aObjs.getToken( 0, ',', nIndex ) );
+ sal_Int32 nObject = 0;
+ sal_Int32 nGeneration = 0;
+ sal_Int32 nGenIndex = 0;
+ nObject = o3tl::toInt32( o3tl::getToken( aToken, 0, ':', nGenIndex ) );
+ if( nGenIndex != -1 )
+ nGeneration = o3tl::toInt32( o3tl::getToken(aToken, 0, ':', nGenIndex ));
+ s_aEmitObjects.push_back( std::pair<sal_Int32,sal_Int32>(nObject,nGeneration) );
+ }
+ }
+ }
+ else
+ {
+ fprintf( stderr, "unrecognized option \"%s\"\n",
+ argv[nArg] );
+ printHelp( argv[0] );
+ return 1;
+ }
+ }
+ else if( pInFile == nullptr )
+ pInFile = argv[nArg];
+ else if( pOutFile == nullptr )
+ pOutFile = argv[nArg];
+ }
+ if( ! pInFile )
+ {
+ fprintf( stderr, "no input file given\n" );
+ return 10;
+ }
+ if( ! pOutFile )
+ {
+ OString aFile( pInFile );
+ if( aFile.getLength() > 0 )
+ {
+ if( aFile.getLength() > 4 )
+ {
+ if( aFile.matchIgnoreAsciiCase( ".pdf", aFile.getLength()-4 ) )
+ aOutFile.append( pInFile, aFile.getLength() - 4 );
+ else
+ aOutFile.append( aFile );
+ }
+ aOutFile.append( "_unzip.pdf" );
+ pOutFile = aOutFile.getStr();
+ }
+ else
+ {
+ fprintf( stderr, "no output file given\n" );
+ return 11;
+ }
+ }
+
+ return handleFile( pInFile, pOutFile, pPassword, aHdl );
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */