PeParser.cpp
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PeParser.cpp
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	#include "PeParser.h"
	#include "ProcessAccessHelp.h"
	#include <algorithm>
	#include <imagehlp.h>

	#pragma comment(lib, "Imagehlp.lib")


	PeParser::PeParser()
	{
	initClass();
	}

	PeParser::PeParser(const WCHAR * file, bool readSectionHeaders)
	{
	initClass();

	filename = file;

	if (filename)
	{
	readPeHeaderFromFile(readSectionHeaders);

	if (readSectionHeaders)
	{
	if (isValidPeFile())
	{
	getSectionHeaders();
	}
	}
	}
	}

	PeParser::PeParser(const DWORD_PTR moduleBase, bool readSectionHeaders)
	{
	initClass();

	moduleBaseAddress = moduleBase;

	if (moduleBaseAddress)
	{
	readPeHeaderFromProcess(readSectionHeaders);

	if (readSectionHeaders)
	{
	if (isValidPeFile())
	{
	getSectionHeaders();
	}
	}
	}

	}

	PeParser::~PeParser()
	{
	if (headerMemory)
	{
	delete [] headerMemory;
	}
	if (fileMemory)
	{
	delete [] fileMemory;
	}

	for (size_t i = 0; i < listPeSection.size(); i++)
	{
	if (listPeSection[i].data)
	{
	delete [] listPeSection[i].data;
	}
	}

	listPeSection.clear();
	}

	void PeParser::initClass()
	{
	fileMemory = 0;
	headerMemory = 0;

	pDosHeader = 0;
	pDosStub = 0;
	dosStubSize = 0;
	pNTHeader32 = 0;
	pNTHeader64 = 0;
	overlayData = 0;
	overlaySize = 0;

	filename = 0;
	fileSize = 0;
	moduleBaseAddress = 0;
	hFile = INVALID_HANDLE_VALUE;
	}

	bool PeParser::isPE64()
	{
	if (isValidPeFile())
	{
	return (pNTHeader32->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR64_MAGIC);
	}
	else
	{
	return false;
	}
	}

	bool PeParser::isPE32()
	{
	if (isValidPeFile())
	{
	return (pNTHeader32->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR32_MAGIC);
	}
	else
	{
	return false;
	}
	}

	bool PeParser::isTargetFileSamePeFormat()
	{
	#ifdef _WIN64
	return isPE64();
	#else
	return isPE32();
	#endif
	}

	bool PeParser::isValidPeFile()
	{
	bool retValue = false;

	if (pDosHeader)
	{
	if (pDosHeader->e_magic == IMAGE_DOS_SIGNATURE)
	{
	if (pNTHeader32)
	{
	if (pNTHeader32->Signature == IMAGE_NT_SIGNATURE)
	{
	retValue = true;
	}
	}
	}
	}

	return retValue;
	}

	bool PeParser::hasDirectory(const int directoryIndex)
	{
	if (isPE32())
	{
	return (pNTHeader32->OptionalHeader.DataDirectory[directoryIndex].VirtualAddress != 0);
	}
	else if (isPE64())
	{
	return (pNTHeader64->OptionalHeader.DataDirectory[directoryIndex].VirtualAddress != 0);
	}
	else
	{
	return false;
	}
	}

	bool PeParser::hasExportDirectory()
	{
	return hasDirectory(IMAGE_DIRECTORY_ENTRY_EXPORT);
	}

	bool PeParser::hasTLSDirectory()
	{
	return hasDirectory(IMAGE_DIRECTORY_ENTRY_TLS);
	}

	bool PeParser::hasRelocationDirectory()
	{
	return hasDirectory(IMAGE_DIRECTORY_ENTRY_BASERELOC);
	}

	DWORD PeParser::getEntryPoint()
	{
	if (isPE32())
	{
	return pNTHeader32->OptionalHeader.AddressOfEntryPoint;
	}
	else if (isPE64())
	{
	return pNTHeader64->OptionalHeader.AddressOfEntryPoint;
	}
	else
	{
	return 0;
	}
	}

	bool PeParser::readPeHeaderFromProcess(bool readSectionHeaders)
	{
	bool retValue = false;
	DWORD correctSize = 0;

	DWORD readSize = getInitialHeaderReadSize(readSectionHeaders);

	headerMemory = new BYTE[readSize];

	if (ProcessAccessHelp::readMemoryPartlyFromProcess(moduleBaseAddress, readSize, headerMemory))
	{
	retValue = true;

	getDosAndNtHeader(headerMemory, (LONG)readSize);

	if (isValidPeFile())
	{
	correctSize = calcCorrectPeHeaderSize(readSectionHeaders);

	if (readSize < correctSize)
	{
	readSize = correctSize;
	delete [] headerMemory;
	headerMemory = new BYTE[readSize];

	if (ProcessAccessHelp::readMemoryPartlyFromProcess(moduleBaseAddress, readSize, headerMemory))
	{
	getDosAndNtHeader(headerMemory, (LONG)readSize);
	}
	}
	}
	}

	return retValue;
	}

	bool PeParser::readPeHeaderFromFile(bool readSectionHeaders)
	{
	bool retValue = false;
	DWORD correctSize = 0;
	DWORD numberOfBytesRead = 0;

	DWORD readSize = getInitialHeaderReadSize(readSectionHeaders);

	headerMemory = new BYTE[readSize];

	if (openFileHandle())
	{
	fileSize = (DWORD)ProcessAccessHelp::getFileSize(hFile);

	if (ReadFile(hFile, headerMemory, readSize, &numberOfBytesRead, 0))
	{
	retValue = true;

	getDosAndNtHeader(headerMemory, (LONG)readSize);

	if (isValidPeFile())
	{
	correctSize = calcCorrectPeHeaderSize(readSectionHeaders);

	if (readSize < correctSize)
	{
	readSize = correctSize;

	if (fileSize > 0)
	{
	if (fileSize < correctSize)
	{
	readSize = fileSize;
	}
	}


	delete [] headerMemory;
	headerMemory = new BYTE[readSize];

	SetFilePointer(hFile, 0, 0, FILE_BEGIN);

	if (ReadFile(hFile, headerMemory, readSize, &numberOfBytesRead, 0))
	{
	getDosAndNtHeader(headerMemory, (LONG)readSize);
	}
	}
	}
	}

	closeFileHandle();
	}

	return retValue;
	}

	bool PeParser::readPeSectionsFromProcess()
	{
	bool retValue = true;
	DWORD_PTR readOffset = 0;

	listPeSection.reserve(getNumberOfSections());

	for (WORD i = 0; i < getNumberOfSections(); i++)
	{
	readOffset = listPeSection[i].sectionHeader.VirtualAddress + moduleBaseAddress;

	listPeSection[i].normalSize = listPeSection[i].sectionHeader.Misc.VirtualSize;

	if (!readSectionFromProcess(readOffset, listPeSection[i]))
	{
	retValue = false;
	}
	}

	return retValue;
	}

	bool PeParser::readPeSectionsFromFile()
	{
	bool retValue = true;
	DWORD readOffset = 0;

	listPeSection.reserve(getNumberOfSections());


	if (openFileHandle())
	{
	for (WORD i = 0; i < getNumberOfSections(); i++)
	{
	readOffset = listPeSection[i].sectionHeader.PointerToRawData;

	listPeSection[i].normalSize = listPeSection[i].sectionHeader.SizeOfRawData;

	if (!readSectionFromFile(readOffset, listPeSection[i]))
	{
	retValue = false;
	}

	}

	closeFileHandle();
	}
	else
	{
	retValue = false;
	}

	return retValue;
	}

	bool PeParser::getSectionHeaders()
	{
	PIMAGE_SECTION_HEADER pSection = IMAGE_FIRST_SECTION(pNTHeader32);

	PeFileSection peFileSection;

	listPeSection.clear();
	listPeSection.reserve(getNumberOfSections());

	for (WORD i = 0; i < getNumberOfSections(); i++)
	{
	memcpy_s(&peFileSection.sectionHeader, sizeof(IMAGE_SECTION_HEADER), pSection, sizeof(IMAGE_SECTION_HEADER));

	listPeSection.push_back(peFileSection);
	pSection++;
	}

	return true;
	}

	bool PeParser::getSectionNameUnicode(const int sectionIndex, WCHAR * output, const int outputLen)
	{
	CHAR sectionNameA[IMAGE_SIZEOF_SHORT_NAME + 1] = {0};

	output[0] = 0;

	memcpy(sectionNameA, listPeSection[sectionIndex].sectionHeader.Name, IMAGE_SIZEOF_SHORT_NAME); //not null terminated

	return (swprintf_s(output, outputLen, L"%S", sectionNameA) != -1);
	}

	WORD PeParser::getNumberOfSections()
	{
	return pNTHeader32->FileHeader.NumberOfSections;
	}

	void PeParser::setNumberOfSections(WORD numberOfSections)
	{
	pNTHeader32->FileHeader.NumberOfSections = numberOfSections;
	}

	std::vector<PeFileSection> & PeParser::getSectionHeaderList()
	{
	return listPeSection;
	}

	void PeParser::getDosAndNtHeader(BYTE * memory, LONG size)
	{
	pDosHeader = (PIMAGE_DOS_HEADER)memory;

	pNTHeader32 = 0;
	pNTHeader64 = 0;
	dosStubSize = 0;
	pDosStub = 0;

	if (pDosHeader->e_lfanew > 0 && pDosHeader->e_lfanew < size) //malformed PE
	{
	pNTHeader32 = (PIMAGE_NT_HEADERS32)((DWORD_PTR)pDosHeader + pDosHeader->e_lfanew);
	pNTHeader64 = (PIMAGE_NT_HEADERS64)((DWORD_PTR)pDosHeader + pDosHeader->e_lfanew);

	if (pDosHeader->e_lfanew > sizeof(IMAGE_DOS_HEADER))
	{
	dosStubSize = pDosHeader->e_lfanew - sizeof(IMAGE_DOS_HEADER);
	pDosStub = (BYTE *)((DWORD_PTR)pDosHeader + sizeof(IMAGE_DOS_HEADER));
	}
	else if (pDosHeader->e_lfanew < sizeof(IMAGE_DOS_HEADER))
	{
	//Overlapped Headers, e.g. Spack (by Bagie)
	pDosHeader->e_lfanew = sizeof(IMAGE_DOS_HEADER);
	}
	}
	}

	DWORD PeParser::calcCorrectPeHeaderSize(bool readSectionHeaders)
	{
	DWORD correctSize = pDosHeader->e_lfanew + 50; //extra buffer

	if (readSectionHeaders)
	{
	correctSize += getNumberOfSections() * sizeof(IMAGE_SECTION_HEADER);
	}

	if (isPE32())
	{
	correctSize += sizeof(IMAGE_NT_HEADERS32);
	}
	else if(isPE64())
	{
	correctSize += sizeof(IMAGE_NT_HEADERS64);
	}
	else
	{
	correctSize = 0; //not a valid PE
	}

	return correctSize;
	}

	DWORD PeParser::getInitialHeaderReadSize(bool readSectionHeaders)
	{
	DWORD readSize = sizeof(IMAGE_DOS_HEADER) + 0x300 + sizeof(IMAGE_NT_HEADERS64);

	//if (readSectionHeaders)
	//{
	// readSize += (10 * sizeof(IMAGE_SECTION_HEADER));
	//}

	return readSize;
	}

	DWORD PeParser::getSectionHeaderBasedFileSize()
	{
	DWORD lastRawOffset = 0, lastRawSize = 0;

	//this is needed if the sections aren't sorted by their RawOffset (e.g. Petite)
	for (WORD i = 0; i < getNumberOfSections(); i++)
	{
	if ((listPeSection[i].sectionHeader.PointerToRawData + listPeSection[i].sectionHeader.SizeOfRawData) > (lastRawOffset + lastRawSize))
	{
	lastRawOffset = listPeSection[i].sectionHeader.PointerToRawData;
	lastRawSize = listPeSection[i].sectionHeader.SizeOfRawData;
	}
	}

	return (lastRawSize + lastRawOffset);
	}

	DWORD PeParser::getSectionHeaderBasedSizeOfImage()
	{
	DWORD lastVirtualOffset = 0, lastVirtualSize = 0;

	//this is needed if the sections aren't sorted by their RawOffset (e.g. Petite)
	for (WORD i = 0; i < getNumberOfSections(); i++)
	{
	if ((listPeSection[i].sectionHeader.VirtualAddress + listPeSection[i].sectionHeader.Misc.VirtualSize) > (lastVirtualOffset + lastVirtualSize))
	{
	lastVirtualOffset = listPeSection[i].sectionHeader.VirtualAddress;
	lastVirtualSize = listPeSection[i].sectionHeader.Misc.VirtualSize;
	}
	}

	return (lastVirtualSize + lastVirtualOffset);
	}

	bool PeParser::openFileHandle()
	{
	if (hFile == INVALID_HANDLE_VALUE)
	{
	if (filename)
	{
	hFile = CreateFile(filename, GENERIC_READ, FILE_SHARE_READ, 0, OPEN_EXISTING, 0, 0);
	}
	else
	{
	hFile = INVALID_HANDLE_VALUE;
	}
	}

	return (hFile != INVALID_HANDLE_VALUE);
	}

	bool PeParser::openWriteFileHandle( const WCHAR * newFile )
	{
	if (newFile)
	{
	hFile = CreateFile(newFile, GENERIC_WRITE, FILE_SHARE_WRITE, 0, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
	}
	else
	{
	hFile = INVALID_HANDLE_VALUE;
	}

	return (hFile != INVALID_HANDLE_VALUE);
	}


	void PeParser::closeFileHandle()
	{
	if (hFile != INVALID_HANDLE_VALUE)
	{
	CloseHandle(hFile);
	hFile = INVALID_HANDLE_VALUE;
	}
	}

	bool PeParser::readSectionFromProcess(const DWORD_PTR readOffset, PeFileSection & peFileSection)
	{
	return readSectionFrom(readOffset, peFileSection, true); //process
	}

	bool PeParser::readSectionFromFile(const DWORD readOffset, PeFileSection & peFileSection)
	{
	return readSectionFrom(readOffset, peFileSection, false); //file
	}

	bool PeParser::readSectionFrom(const DWORD_PTR readOffset, PeFileSection & peFileSection, const bool isProcess)
	{
	const DWORD maxReadSize = 100;
	DWORD currentReadSize;
	BYTE data[maxReadSize];
	bool retValue = true;
	DWORD valuesFound = 0;
	DWORD readSize = 0;
	DWORD_PTR currentOffset = 0;

	peFileSection.data = 0;
	peFileSection.dataSize = 0;
	readSize = peFileSection.normalSize;

	if (!readOffset \|\| !readSize)
	{
	return true; //section without data is valid
	}

	if (readSize <= maxReadSize)
	{
	peFileSection.dataSize = readSize;
	peFileSection.normalSize = readSize;

	if (isProcess)
	{
	return readPeSectionFromProcess(readOffset, peFileSection);
	}
	else
	{
	return readPeSectionFromFile((DWORD)readOffset, peFileSection);
	}
	}

	currentReadSize = readSize % maxReadSize; //alignment %

	if (!currentReadSize)
	{
	currentReadSize = maxReadSize;
	}
	currentOffset = readOffset + readSize - currentReadSize;


	while(currentOffset >= readOffset) //start from the end
	{
	ZeroMemory(data, currentReadSize);

	if (isProcess)
	{
	retValue = ProcessAccessHelp::readMemoryPartlyFromProcess(currentOffset, currentReadSize, data);
	}
	else
	{
	retValue = ProcessAccessHelp::readMemoryFromFile(hFile, (LONG)currentOffset, currentReadSize, data);
	}

	if (!retValue)
	{
	break;
	}

	valuesFound = isMemoryNotNull(data, currentReadSize);
	if (valuesFound)
	{
	//found some real code

	currentOffset += valuesFound;

	if (readOffset < currentOffset)
	{
	//real size
	peFileSection.dataSize = (DWORD)(currentOffset - readOffset);

	//some safety space because of something like this at the end of a section:
	//FF25 C0604000 JMP DWORD PTR DS:[<&KERNEL32.RtlUnwind>]
	peFileSection.dataSize += sizeof(DWORD);

	if (peFileSection.normalSize < peFileSection.dataSize)
	{
	peFileSection.dataSize = peFileSection.normalSize;
	}
	}

	break;
	}

	currentReadSize = maxReadSize;
	currentOffset -= currentReadSize;
	}


	if (peFileSection.dataSize)
	{
	if (isProcess)
	{
	retValue = readPeSectionFromProcess(readOffset, peFileSection);
	}
	else
	{
	retValue = readPeSectionFromFile((DWORD)readOffset, peFileSection);
	}
	}

	return retValue;
	}


	DWORD PeParser::isMemoryNotNull( BYTE * data, int dataSize )
	{
	for (int i = (dataSize - 1); i >= 0; i--)
	{
	if (data[i] != 0)
	{
	return i + 1;
	}
	}

	return 0;
	}

	bool PeParser::savePeFileToDisk( const WCHAR * newFile )
	{
	bool retValue = true;
	DWORD dwFileOffset = 0, dwWriteSize = 0;

	if (getNumberOfSections() != listPeSection.size())
	{
	return false;
	}

	if (openWriteFileHandle(newFile))
	{
	//Dos header
	dwWriteSize = sizeof(IMAGE_DOS_HEADER);
	if (!ProcessAccessHelp::writeMemoryToFile(hFile, dwFileOffset, dwWriteSize, pDosHeader))
	{
	retValue = false;
	}
	dwFileOffset += dwWriteSize;


	if (dosStubSize && pDosStub)
	{
	//Dos Stub
	dwWriteSize = dosStubSize;
	if (!ProcessAccessHelp::writeMemoryToFile(hFile, dwFileOffset, dwWriteSize, pDosStub))
	{
	retValue = false;
	}
	dwFileOffset += dwWriteSize;
	}


	//Pe Header
	if (isPE32())
	{
	dwWriteSize = sizeof(IMAGE_NT_HEADERS32);
	}
	else
	{
	dwWriteSize = sizeof(IMAGE_NT_HEADERS64);
	}

	if (!ProcessAccessHelp::writeMemoryToFile(hFile, dwFileOffset, dwWriteSize, pNTHeader32))
	{
	retValue = false;
	}
	dwFileOffset += dwWriteSize;

	//section headers
	dwWriteSize = sizeof(IMAGE_SECTION_HEADER);

	for (WORD i = 0; i < getNumberOfSections(); i++)
	{
	if (!ProcessAccessHelp::writeMemoryToFile(hFile, dwFileOffset, dwWriteSize, &listPeSection[i].sectionHeader))
	{
	retValue = false;
	break;
	}
	dwFileOffset += dwWriteSize;
	}

	for (WORD i = 0; i < getNumberOfSections(); i++)
	{
	if (!listPeSection[i].sectionHeader.PointerToRawData)
	continue;


	if (listPeSection[i].sectionHeader.PointerToRawData > dwFileOffset)
	{
	dwWriteSize = listPeSection[i].sectionHeader.PointerToRawData - dwFileOffset; //padding

	if (!writeZeroMemoryToFile(hFile, dwFileOffset, dwWriteSize))
	{
	retValue = false;
	break;
	}
	dwFileOffset += dwWriteSize;
	}

	dwWriteSize = listPeSection[i].dataSize;

	if (dwWriteSize)
	{
	if (!ProcessAccessHelp::writeMemoryToFile(hFile, listPeSection[i].sectionHeader.PointerToRawData, dwWriteSize, listPeSection[i].data))
	{
	retValue = false;
	break;
	}
	dwFileOffset += dwWriteSize;

	if (listPeSection[i].dataSize < listPeSection[i].sectionHeader.SizeOfRawData) //padding
	{
	dwWriteSize = listPeSection[i].sectionHeader.SizeOfRawData - listPeSection[i].dataSize;

	if (!writeZeroMemoryToFile(hFile, dwFileOffset, dwWriteSize))
	{
	retValue = false;
	break;
	}
	dwFileOffset += dwWriteSize;
	}
	}

	}

	//add overlay?
	if (overlaySize && overlayData)
	{
	dwWriteSize = overlaySize;
	if (!ProcessAccessHelp::writeMemoryToFile(hFile, dwFileOffset, dwWriteSize, overlayData))
	{
	retValue = false;
	}
	dwFileOffset += dwWriteSize;
	}

	SetEndOfFile(hFile);

	closeFileHandle();
	}

	return retValue;
	}

	bool PeParser::writeZeroMemoryToFile(HANDLE hFile, DWORD fileOffset, DWORD size)
	{
	bool retValue = false;
	PVOID zeromemory = calloc(size, 1);

	if (zeromemory)
	{
	retValue = ProcessAccessHelp::writeMemoryToFile(hFile, fileOffset, size, zeromemory);
	free(zeromemory);
	}

	return retValue;
	}

	void PeParser::removeDosStub()
	{
	if (pDosHeader)
	{
	dosStubSize = 0;
	pDosStub = 0; //must not delete []
	pDosHeader->e_lfanew = sizeof(IMAGE_DOS_HEADER);
	}
	}

	bool PeParser::readPeSectionFromFile(DWORD readOffset, PeFileSection & peFileSection)
	{
	DWORD bytesRead = 0;

	peFileSection.data = new BYTE[peFileSection.dataSize];

	SetFilePointer(hFile, readOffset, 0, FILE_BEGIN);

	return (ReadFile(hFile, peFileSection.data, peFileSection.dataSize, &bytesRead, 0) != FALSE);
	}

	bool PeParser::readPeSectionFromProcess(DWORD_PTR readOffset, PeFileSection & peFileSection)
	{
	peFileSection.data = new BYTE[peFileSection.dataSize];

	return ProcessAccessHelp::readMemoryPartlyFromProcess(readOffset, peFileSection.dataSize, peFileSection.data);
	}

	DWORD PeParser::alignValue(DWORD badValue, DWORD alignTo)
	{
	return (((badValue + alignTo - 1) / alignTo) * alignTo);
	}

	bool PeParser::addNewLastSection(const CHAR * sectionName, DWORD sectionSize, BYTE * sectionData)
	{
	size_t nameLength = strlen(sectionName);
	DWORD fileAlignment = 0, sectionAlignment = 0;
	PeFileSection peFileSection;

	if (nameLength > IMAGE_SIZEOF_SHORT_NAME)
	{
	return false;
	}

	if (isPE32())
	{
	fileAlignment = pNTHeader32->OptionalHeader.FileAlignment;
	sectionAlignment = pNTHeader32->OptionalHeader.SectionAlignment;
	}
	else
	{
	fileAlignment = pNTHeader64->OptionalHeader.FileAlignment;
	sectionAlignment = pNTHeader64->OptionalHeader.SectionAlignment;
	}

	memcpy_s(peFileSection.sectionHeader.Name, IMAGE_SIZEOF_SHORT_NAME, sectionName, nameLength);

	//last section doesn't need SizeOfRawData alignment
	peFileSection.sectionHeader.SizeOfRawData = sectionSize; //alignValue(sectionSize, fileAlignment);
	peFileSection.sectionHeader.Misc.VirtualSize = alignValue(sectionSize, sectionAlignment);

	peFileSection.sectionHeader.PointerToRawData = alignValue(getSectionHeaderBasedFileSize(), fileAlignment);
	peFileSection.sectionHeader.VirtualAddress = alignValue(getSectionHeaderBasedSizeOfImage(), sectionAlignment);

	peFileSection.sectionHeader.Characteristics = IMAGE_SCN_MEM_EXECUTE\|IMAGE_SCN_MEM_READ\|IMAGE_SCN_MEM_WRITE\|IMAGE_SCN_CNT_CODE\|IMAGE_SCN_CNT_INITIALIZED_DATA;

	peFileSection.normalSize = peFileSection.sectionHeader.SizeOfRawData;
	peFileSection.dataSize = peFileSection.sectionHeader.SizeOfRawData;

	if (sectionData == 0)
	{
	peFileSection.data = new BYTE[peFileSection.sectionHeader.SizeOfRawData];
	ZeroMemory(peFileSection.data , peFileSection.sectionHeader.SizeOfRawData);
	}
	else
	{
	peFileSection.data = sectionData;
	}

	listPeSection.push_back(peFileSection);

	setNumberOfSections(getNumberOfSections() + 1);

	return true;
	}

	DWORD_PTR PeParser::getStandardImagebase()
	{
	if (isPE32())
	{
	return pNTHeader32->OptionalHeader.ImageBase;
	}
	else
	{
	return pNTHeader64->OptionalHeader.ImageBase;
	}
	}

	int PeParser::convertRVAToOffsetVectorIndex(DWORD_PTR dwRVA)
	{
	for (WORD i = 0; i < getNumberOfSections(); i++)
	{
	if ((listPeSection[i].sectionHeader.VirtualAddress <= dwRVA) && ((listPeSection[i].sectionHeader.VirtualAddress + listPeSection[i].sectionHeader.Misc.VirtualSize) > dwRVA))
	{
	return i;
	}
	}

	return -1;
	}

	DWORD_PTR PeParser::convertRVAToOffsetVector(DWORD_PTR dwRVA)
	{
	for (WORD i = 0; i < getNumberOfSections(); i++)
	{
	if ((listPeSection[i].sectionHeader.VirtualAddress <= dwRVA) && ((listPeSection[i].sectionHeader.VirtualAddress + listPeSection[i].sectionHeader.Misc.VirtualSize) > dwRVA))
	{
	return ((dwRVA - listPeSection[i].sectionHeader.VirtualAddress) + listPeSection[i].sectionHeader.PointerToRawData);
	}
	}

	return 0;
	}

	DWORD_PTR PeParser::convertRVAToOffsetRelative(DWORD_PTR dwRVA)
	{
	for (WORD i = 0; i < getNumberOfSections(); i++)
	{
	if ((listPeSection[i].sectionHeader.VirtualAddress <= dwRVA) && ((listPeSection[i].sectionHeader.VirtualAddress + listPeSection[i].sectionHeader.Misc.VirtualSize) > dwRVA))
	{
	return (dwRVA - listPeSection[i].sectionHeader.VirtualAddress);
	}
	}

	return 0;
	}

	DWORD_PTR PeParser::convertOffsetToRVAVector(DWORD_PTR dwOffset)
	{
	for (WORD i = 0; i < getNumberOfSections(); i++)
	{
	if ((listPeSection[i].sectionHeader.PointerToRawData <= dwOffset) && ((listPeSection[i].sectionHeader.PointerToRawData + listPeSection[i].sectionHeader.SizeOfRawData) > dwOffset))
	{
	return ((dwOffset - listPeSection[i].sectionHeader.PointerToRawData) + listPeSection[i].sectionHeader.VirtualAddress);
	}
	}

	return 0;
	}

	void PeParser::fixPeHeader()
	{
	DWORD dwSize = pDosHeader->e_lfanew + sizeof(DWORD) + sizeof(IMAGE_FILE_HEADER);

	if (isPE32())
	{
	//delete bound import directories
	pNTHeader32->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT].VirtualAddress = 0;
	pNTHeader32->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT].Size = 0;

	//max 16, zeroing possible garbage values
	for (DWORD i = pNTHeader32->OptionalHeader.NumberOfRvaAndSizes; i < IMAGE_NUMBEROF_DIRECTORY_ENTRIES; i++)
	{
	pNTHeader32->OptionalHeader.DataDirectory[i].Size = 0;
	pNTHeader32->OptionalHeader.DataDirectory[i].VirtualAddress = 0;
	}

	pNTHeader32->OptionalHeader.NumberOfRvaAndSizes = IMAGE_NUMBEROF_DIRECTORY_ENTRIES;
	pNTHeader32->FileHeader.SizeOfOptionalHeader = sizeof(IMAGE_OPTIONAL_HEADER32);

	pNTHeader32->OptionalHeader.SizeOfImage = getSectionHeaderBasedSizeOfImage();

	if (moduleBaseAddress)
	{
	pNTHeader32->OptionalHeader.ImageBase = (DWORD)moduleBaseAddress;
	}

	pNTHeader32->OptionalHeader.SizeOfHeaders = alignValue(dwSize + pNTHeader32->FileHeader.SizeOfOptionalHeader + (getNumberOfSections() * sizeof(IMAGE_SECTION_HEADER)), pNTHeader32->OptionalHeader.FileAlignment);
	}
	else
	{
	//delete bound import directories
	pNTHeader64->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT].VirtualAddress = 0;
	pNTHeader64->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT].Size = 0;

	//max 16, zeroing possible garbage values
	for (DWORD i = pNTHeader64->OptionalHeader.NumberOfRvaAndSizes; i < IMAGE_NUMBEROF_DIRECTORY_ENTRIES; i++)
	{
	pNTHeader64->OptionalHeader.DataDirectory[i].Size = 0;
	pNTHeader64->OptionalHeader.DataDirectory[i].VirtualAddress = 0;
	}

	pNTHeader64->OptionalHeader.NumberOfRvaAndSizes = IMAGE_NUMBEROF_DIRECTORY_ENTRIES;
	pNTHeader64->FileHeader.SizeOfOptionalHeader = sizeof(IMAGE_OPTIONAL_HEADER64);

	pNTHeader64->OptionalHeader.SizeOfImage = getSectionHeaderBasedSizeOfImage();

	if (moduleBaseAddress)
	{
	pNTHeader64->OptionalHeader.ImageBase = moduleBaseAddress;
	}

	pNTHeader64->OptionalHeader.SizeOfHeaders = alignValue(dwSize + pNTHeader64->FileHeader.SizeOfOptionalHeader + (getNumberOfSections() * sizeof(IMAGE_SECTION_HEADER)), pNTHeader64->OptionalHeader.FileAlignment);
	}

	removeIatDirectory();
	}

	void PeParser::removeIatDirectory()
	{
	DWORD searchAddress = 0;

	if (isPE32())
	{
	searchAddress = pNTHeader32->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IAT].VirtualAddress;

	pNTHeader32->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IAT].VirtualAddress = 0;
	pNTHeader32->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IAT].Size = 0;
	}
	else
	{
	searchAddress = pNTHeader64->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IAT].VirtualAddress;

	pNTHeader64->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IAT].VirtualAddress = 0;
	pNTHeader64->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IAT].Size = 0;
	}

	if (searchAddress)
	{
	for (WORD i = 0; i < getNumberOfSections(); i++)
	{
	if ((listPeSection[i].sectionHeader.VirtualAddress <= searchAddress) && ((listPeSection[i].sectionHeader.VirtualAddress + listPeSection[i].sectionHeader.Misc.VirtualSize) > searchAddress))
	{
	//section must be read and writable
	listPeSection[i].sectionHeader.Characteristics \|= IMAGE_SCN_MEM_READ\|IMAGE_SCN_MEM_WRITE;
	}
	}
	}
	}

	void PeParser::setDefaultFileAlignment()
	{
	if (isPE32())
	{
	pNTHeader32->OptionalHeader.FileAlignment = FileAlignmentConstant;
	}
	else
	{
	pNTHeader64->OptionalHeader.FileAlignment = FileAlignmentConstant;
	}
	}

	bool PeFileSectionSortByPointerToRawData(const PeFileSection& d1, const PeFileSection& d2)
	{
	return d1.sectionHeader.PointerToRawData < d2.sectionHeader.PointerToRawData;
	}

	bool PeFileSectionSortByVirtualAddress(const PeFileSection& d1, const PeFileSection& d2)
	{
	return d1.sectionHeader.VirtualAddress < d2.sectionHeader.VirtualAddress;
	}

	void PeParser::alignAllSectionHeaders()
	{
	DWORD sectionAlignment = 0;
	DWORD fileAlignment = 0;
	DWORD newFileSize = 0;

	if (isPE32())
	{
	sectionAlignment = pNTHeader32->OptionalHeader.SectionAlignment;
	fileAlignment = pNTHeader32->OptionalHeader.FileAlignment;
	}
	else
	{
	sectionAlignment = pNTHeader64->OptionalHeader.SectionAlignment;
	fileAlignment = pNTHeader64->OptionalHeader.FileAlignment;
	}

	std::sort(listPeSection.begin(), listPeSection.end(), PeFileSectionSortByPointerToRawData); //sort by PointerToRawData ascending

	newFileSize = pDosHeader->e_lfanew + sizeof(DWORD) + sizeof(IMAGE_FILE_HEADER) + pNTHeader32->FileHeader.SizeOfOptionalHeader + (getNumberOfSections() * sizeof(IMAGE_SECTION_HEADER));


	for (WORD i = 0; i < getNumberOfSections(); i++)
	{
	listPeSection[i].sectionHeader.VirtualAddress = alignValue(listPeSection[i].sectionHeader.VirtualAddress, sectionAlignment);
	listPeSection[i].sectionHeader.Misc.VirtualSize = alignValue(listPeSection[i].sectionHeader.Misc.VirtualSize, sectionAlignment);

	listPeSection[i].sectionHeader.PointerToRawData = alignValue(newFileSize, fileAlignment);
	listPeSection[i].sectionHeader.SizeOfRawData = alignValue(listPeSection[i].dataSize, fileAlignment);

	newFileSize = listPeSection[i].sectionHeader.PointerToRawData + listPeSection[i].sectionHeader.SizeOfRawData;
	}

	std::sort(listPeSection.begin(), listPeSection.end(), PeFileSectionSortByVirtualAddress); //sort by VirtualAddress ascending
	}

	bool PeParser::dumpProcess(DWORD_PTR modBase, DWORD_PTR entryPoint, const WCHAR * dumpFilePath)
	{
	moduleBaseAddress = modBase;

	if (readPeSectionsFromProcess())
	{
	setDefaultFileAlignment();

	setEntryPointVa(entryPoint);

	alignAllSectionHeaders();
	fixPeHeader();

	getFileOverlay();

	return savePeFileToDisk(dumpFilePath);
	}

	return false;
	}

	bool PeParser::dumpProcess(DWORD_PTR modBase, DWORD_PTR entryPoint, const WCHAR * dumpFilePath, std::vector<PeSection> & sectionList)
	{
	if (listPeSection.size() == sectionList.size())
	{
	for (int i = (getNumberOfSections() - 1); i >= 0; i--)
	{
	if (!sectionList[i].isDumped)
	{
	listPeSection.erase(listPeSection.begin() + i);
	setNumberOfSections(getNumberOfSections() - 1);
	}
	else
	{
	listPeSection[i].sectionHeader.Misc.VirtualSize = sectionList[i].virtualSize;
	listPeSection[i].sectionHeader.SizeOfRawData = sectionList[i].rawSize;
	listPeSection[i].sectionHeader.Characteristics = sectionList[i].characteristics;
	}
	}
	}

	return dumpProcess(modBase, entryPoint, dumpFilePath);
	}

	void PeParser::setEntryPointVa(DWORD_PTR entryPoint)
	{
	DWORD entryPointRva = (DWORD)(entryPoint - moduleBaseAddress);

	setEntryPointRva(entryPointRva);
	}

	void PeParser::setEntryPointRva(DWORD entryPoint)
	{
	if (isPE32())
	{
	pNTHeader32->OptionalHeader.AddressOfEntryPoint = entryPoint;
	}
	else if (isPE64())
	{
	pNTHeader64->OptionalHeader.AddressOfEntryPoint = entryPoint;
	}
	}

	bool PeParser::getFileOverlay()
	{
	DWORD numberOfBytesRead;
	bool retValue = false;

	if (!hasOverlayData())
	{
	return false;
	}

	if (openFileHandle())
	{
	DWORD overlayOffset = getSectionHeaderBasedFileSize();
	DWORD fileSize = (DWORD)ProcessAccessHelp::getFileSize(hFile);
	overlaySize = fileSize - overlayOffset;

	overlayData = new BYTE[overlaySize];

	SetFilePointer(hFile, overlayOffset, 0, FILE_BEGIN);

	if (ReadFile(hFile, overlayData, overlaySize, &numberOfBytesRead, 0))
	{
	retValue = true;
	}

	closeFileHandle();
	}

	return retValue;
	}

	bool PeParser::hasOverlayData()
	{
	if (!filename)
	return false;

	if (isValidPeFile())
	{
	DWORD fileSize = (DWORD)ProcessAccessHelp::getFileSize(filename);

	return (fileSize > getSectionHeaderBasedFileSize());
	}
	else
	{
	return false;
	}
	}

	bool PeParser::updatePeHeaderChecksum(const WCHAR * targetFile, DWORD fileSize)
	{
	PIMAGE_NT_HEADERS32 pNTHeader32 = 0;
	PIMAGE_NT_HEADERS64 pNTHeader64 = 0;
	DWORD headerSum = 0;
	DWORD checkSum = 0;
	bool retValue = false;

	if (!fileSize)
	return retValue;

	HANDLE hFileToMap = CreateFile(targetFile, GENERIC_READ\|GENERIC_WRITE, FILE_SHARE_READ\|FILE_SHARE_WRITE, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);

	if(hFileToMap != INVALID_HANDLE_VALUE)
	{
	HANDLE hMappedFile = CreateFileMapping(hFileToMap, 0, PAGE_READWRITE, 0, 0, 0);
	if(hMappedFile)
	{
	if (GetLastError() != ERROR_ALREADY_EXISTS)
	{
	LPVOID addrMappedDll = MapViewOfFile(hMappedFile, FILE_MAP_ALL_ACCESS, 0, 0, 0);

	if (addrMappedDll)
	{
	pNTHeader32 = (PIMAGE_NT_HEADERS32)CheckSumMappedFile(addrMappedDll, fileSize, &headerSum, &checkSum);

	if (pNTHeader32)
	{
	if (pNTHeader32->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR64_MAGIC)
	{
	pNTHeader64 = (PIMAGE_NT_HEADERS64)pNTHeader32;
	pNTHeader64->OptionalHeader.CheckSum = checkSum;
	}
	else
	{
	pNTHeader32->OptionalHeader.CheckSum = checkSum;
	}

	retValue = true;
	}

	UnmapViewOfFile(addrMappedDll);
	}
	}
	CloseHandle(hMappedFile);
	}
	CloseHandle(hFileToMap);
	}

	return retValue;
	}

	BYTE * PeParser::getSectionMemoryByIndex(int index)
	{
	return listPeSection[index].data;
	}

	DWORD PeParser::getSectionMemorySizeByIndex(int index)
	{
	return listPeSection[index].dataSize;
	}

	DWORD PeParser::getSectionAddressRVAByIndex( int index )
	{
	return listPeSection[index].sectionHeader.VirtualAddress;
	}

	PIMAGE_NT_HEADERS PeParser::getCurrentNtHeader()
	{
	#ifdef _WIN64
	return pNTHeader64;
	#else
	return pNTHeader32;
	#endif
	}

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