static public MsDosHeader readMSDOSHeader(BinaryIn source)
{
MsDosHeader dosHeader = new MsDosHeader();
dosHeader.signature = source.getTwo();
if (dosHeader.signature != 0x5a4d)
{
throw new Win32FormatException("this is not a valid win32 executable file");
}
dosHeader.lastsize = source.getTwo();
dosHeader.nblocks = source.getTwo();
dosHeader.nreloc = source.getTwo();
dosHeader.hdrsize = source.getTwo();
dosHeader.minalloc = source.getTwo();
dosHeader.maxalloc = source.getTwo();
dosHeader.ss = source.getTwo();
dosHeader.sp = source.getTwo();
dosHeader.checksum = source.getTwo();
dosHeader.ip = source.getTwo();
dosHeader.cs = source.getTwo();
dosHeader.relocpos = source.getTwo();
dosHeader.noverlay = source.getTwo();
dosHeader.reserved1 = source.getRange(8);
dosHeader.oem_id = source.getTwo();
dosHeader.oem_info = source.getTwo();
dosHeader.reserved2 = source.getRange(20);
dosHeader.e_lfanew = source.getFour();
return(dosHeader);
}
//- reading in ----------------------------------------------------------------
public void readFile(String _filename)
{
filename = _filename;
BinaryIn source = new BinaryIn(filename);
dosHeader = MsDosHeader.readMSDOSHeader(source);
source.seek(dosHeader.e_lfanew);
uint pesig = source.getFour();
if (pesig != 0x00004550)
{
throw new Win32ReadException("this is not a valid win32 executable file");
}
machine = (MachineType)source.getTwo();
uint secCount = source.getTwo();
uint stamp = source.getFour();
timeStamp = setTimestamp(stamp);
uint symbolTblAddr = source.getFour();
uint symbolTblCount = source.getFour(); //these fields should be zero
uint optionalHdrSize = source.getTwo();
if (optionalHdrSize != 0xe0)
{
throw new Win32ReadException("this is not a valid win32 executable file");
}
uint flags = source.getTwo();
characteristics = Characteristics.decodeFlags(flags);
readOptionalHeader(source);
loadSections(source, secCount);
//getImportTable(source);
//getExportTable(source);
//getResourceTable(source);
}
//private void getResourceTable(SourceFile source)
//{
// if (optHeader.dataDirectory[DataDirectory.IMAGE_DIRECTORY_ENTRY_RESOURCE].size > 0)
// {
// uint resOfs = optHeader.dataDirectory[DataDirectory.IMAGE_DIRECTORY_ENTRY_RESOURCE].rva;
// uint resSize = optHeader.dataDirectory[DataDirectory.IMAGE_DIRECTORY_ENTRY_RESOURCE].size;
// Section resSec = findSection(resOfs);
// if (resSec != null)
// {
// SourceFile secData = new SourceFile(resSec.data);
// resourceTable = new ResourceTable();
// resourceTable.imageBase = imageBase;
// resourceTable.resourceRVA = resOfs;
// resourceTable.data = secData.getRange(resOfs - resSec.memloc, resSize);
// }
// }
//}
//- writing out ----------------------------------------------------------------
public void writeFile(String _filename)
{
filename = _filename;
mempos = 0x1000;
filepos = 0;
//build dos header
if (dosHeader == null)
{
dosHeader = new MsDosHeader();
}
uint winHdrPos = (((dosHeader.headerSize + 7) / 8) * 8);
dosHeader.e_lfanew = winHdrPos;
//win hdr fields
characteristics.isExecutable = true;
characteristics.is32BitMachine = true;
if (isDLL)
{
characteristics.isDLL = true;
imageBase = 0x10000000; //dll default image base
}
uint sectionCount = (uint)sections.Count;
if (exportList.Count > 0)
{
sectionCount++;
}
if (relocList.Count > 0)
{
sectionCount++;
}
filepos = (winHdrPos + 0x18 + 0xe0 + (uint)(sectionCount * 0x28) + (fileAlignment - 1)) & ~(fileAlignment - 1);
sizeOfHeaders = filepos;
buildSectionTable();
//build standard sections
//int importSecNum = -1;
//if (importTable != null)
//{
// importSecNum = sections.Count;
// CoffSection importSection = importTable.createSection();
// sections.Add(importSection);
//}
if (exportList.Count > 0)
{
buildExportSection();
}
//int resourceSecNum = -1;
//if (resourceTable != null)
//{
// resourceSecNum = sections.Count;
// CoffSection resourceSection = resourceTable.createSection();
// sections.Add(resourceSection);
//}
if (relocList.Count > 0)
{
buildRelocSection();
}
sizeOfImage = mempos; //total image size
BinaryOut outfile = new BinaryOut(filename);
dosHeader.writeOut(outfile);
outfile.putZeros(winHdrPos - dosHeader.headerSize);
writeCoffHeader(outfile);
writeOptionalHeader(outfile);
writeSectionTable(outfile);
outfile.putZeros(sizeOfHeaders - outfile.getPos());
writeSectionData(outfile);
outfile.writeOut();
}
public Win32Exe()
{
filename = null;
isDLL = false;
mempos = 0;
filepos = 0;
dosHeader = null;
//coff header fields
machine = MachineType.IMAGE_FILE_MACHINE_I386;
timeStamp = DateTime.Now;
characteristics = new Characteristics();
//optional header fields
magicNum = 0x010b; //PE32 executable
majorLinkerVersion = 0;
minorLinkerVersion = 1;
sizeOfCode = 0;
sizeOfInitializedData = 0;
sizeOfUninitializedData = 0;
addressOfEntryPoint = 0;
baseOfCode = 0;
baseOfData = 0;
imageBase = 0x400000; //exe default image base
memAlignment = 0x1000;
fileAlignment = 0x200;
majorOSVersion = 5;
minorOSVersion = 1;
majorImageVersion = 0;
minorImageVersion = 0;
majorSubsystemVersion = 5;
minorSubsystemVersion = 1;
win32VersionValue = 0; //reserved, must be zero
sizeOfImage = 0;
sizeOfHeaders = 0;
checksum = 0;
subsystem = 2;
dLLCharacteristics = 0x140;
sizeOfStackReserve = 0x100000;
sizeOfStackCommit = 0x1000;
sizeOfHeapReserve = 0x100000;
sizeOfHeapCommit = 0x1000;
loaderFlags = 0; //reserved, must be zero
numberOfRvaAndSizes = 0x10; //"not fixed" but the PE format spec only defines 16 of these
//data directory
dExportTable = new DataDirectory();
dImportTable = new DataDirectory();
dResourceTable = new DataDirectory();
exceptionTable = new DataDirectory();
certificatesTable = new DataDirectory();
baseRelocationTable = new DataDirectory();
debugTable = new DataDirectory();
architecture = new DataDirectory();
globalPtr = new DataDirectory();
threadLocalStorageTable = new DataDirectory();
loadConfigurationTable = new DataDirectory();
boundImportTable = new DataDirectory();
importAddressTable = new DataDirectory();
delayImportDescriptor = new DataDirectory();
CLRRuntimeHeader = new DataDirectory();
reserved = new DataDirectory();
sections = new List <CoffSection>();
//standard sections
importSec = null;
importList = new List <CoffImportEntry>();
exportSec = null;
exportList = new List <CoffExportEntry>();
resourceSec = null;
resourceList = new List <ResourceData>();
relocSec = null;
relocList = new List <CoffRelocationEntry>();
}