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Diffstat (limited to '')
| -rw-r--r-- | sdext/source/pdfimport/test/pdfunzip.cxx | 532 |
1 files changed, 532 insertions, 0 deletions
diff --git a/sdext/source/pdfimport/test/pdfunzip.cxx b/sdext/source/pdfimport/test/pdfunzip.cxx new file mode 100644 index 000000000..86797056e --- /dev/null +++ b/sdext/source/pdfimport/test/pdfunzip.cxx @@ -0,0 +1,532 @@ +/* -*- 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: */ |