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#include "StdAfx.h"
#define DONT_INCLUDE_AFXTEMPL
#include "CPEFile.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
CPEFile::CPEFile() {
mFile = NULL;
}
CPEFile::~CPEFile() {
Close();
}
/*virtual*/ void CPEFile::Close() {
if (mFile) {
mFile->Close();
delete mFile;
}
mFile = NULL;
if (mSectionHeaders)
free(mSectionHeaders);
mSectionHeaders = NULL;
}
/*virtual*/ BOOL CPEFile::Open(const char*filename, unsigned int flags, CFileException*pError) {
BOOL result = false;
#line 36
mFile = new CFile;
if (mFile->Open(filename, flags, pError)) {
result = Init();
if (!result)
Close();
}
return result;
}
BOOL CPEFile::Init() {
IMAGE_DOS_HEADER header;
mSectionHeaders = NULL;
memset(&header, 0, sizeof(header));
mFile->Read(&header, sizeof(header));
if (header.e_magic != IMAGE_DOS_SIGNATURE)
return false;
mFile->Seek(header.e_lfanew, CFile::begin);
DWORD magic = 0;
mFile->Read(&magic, sizeof(magic));
if (magic != IMAGE_NT_SIGNATURE)
return false;
memset(&mFileHeader, 0, sizeof(mFileHeader));
mFile->Read(&mFileHeader, sizeof(mFileHeader));
mFile->Seek(IMAGE_SIZEOF_NT_OPTIONAL_HEADER, CFile::current);
mSectionHeaders = (IMAGE_SECTION_HEADER *) malloc(sizeof(IMAGE_SECTION_HEADER) * mFileHeader.NumberOfSections);
mFile->Read(mSectionHeaders, sizeof(IMAGE_SECTION_HEADER) * mFileHeader.NumberOfSections);
int i;
for (i = 0; i < mFileHeader.NumberOfSections; i++) {
if (strcmp((const char *) mSectionHeaders[i].Name, ".rsrc") == 0)
break;
}
if (i == mFileHeader.NumberOfSections)
return false;
mRsrcPtr = mSectionHeaders[i].PointerToRawData;
mRsrcIndex = i;
return true;
}
BOOL CPEFile::EnumResource(CString& s, RESTRACKERWORK& work) {
IMAGE_RESOURCE_DIRECTORY_ENTRY entry;
if (!EnumResourceDirectory(&entry, work))
return false;
GetResourceName(s, entry);
return true;
}
BOOL CPEFile::EnumResourceDirectory(IMAGE_RESOURCE_DIRECTORY_ENTRY* entry, RESTRACKERWORK& work) {
if (!work.didRead) {
mFile->Seek(mRsrcPtr, CFile::begin);
mFile->Read(&work.directory, sizeof(work.directory));
work.position = mFile->GetPosition();
work.didRead = true;
work.nextIndex = 0;
}
int entryCount = (work.directory.NumberOfNamedEntries + work.directory.NumberOfIdEntries);
if (work.nextIndex >= entryCount)
return false;
mFile->Seek(work.position + work.nextIndex * sizeof(IMAGE_RESOURCE_DIRECTORY_ENTRY), CFile::begin);
mFile->Read(entry, sizeof(IMAGE_RESOURCE_DIRECTORY_ENTRY));
memcpy(&work.entry, entry, sizeof(IMAGE_RESOURCE_DIRECTORY_ENTRY));
work.nextIndex++;
return true;
}
void CPEFile::GetResourceName(CString& s, IMAGE_RESOURCE_DIRECTORY_ENTRY& entry) {
if (entry.Name & 0x80000000) {
unsigned short nameLen;
mFile->Seek(mRsrcPtr + entry.NameOffset, CFile::begin);
mFile->Read(&nameLen, sizeof(nameLen));
char *wstr = (char *) malloc(nameLen * 2);
mFile->Read(wstr, nameLen * 2);
int bufferSize = nameLen * 2 + 1;
char *theBuf = (char *) malloc(bufferSize);
memset(theBuf, 0, bufferSize);
int i;
for (i = 0; i < nameLen; i++) {
theBuf[i] = wstr[i * 2];
}
theBuf[i] = 0;
s = theBuf;
free(wstr);
free(theBuf);
} else {
s.Format("#%u", entry.Name);
}
if (entry.OffsetToData & 0x80000000)
s += "\\";
}
void CPEFile::EnterDirectory(RESTRACKERWORK& child, RESTRACKERWORK& parent) {
mFile->Seek(mRsrcPtr + parent.entry.OffsetToDirectory, CFile::begin);
mFile->Read(&child.directory, sizeof(child.directory));
child.position = mFile->GetPosition();
child.didRead = true;
child.nextIndex = 0;
}
/*virtual*/ BOOL CPEFile::Seek(const char* inName) {
#line 141
_ASSERT(strncmp(inName, "\\.rsrc", 6) == 0);
char *name = (char *) malloc(strlen(inName) + 1);
strcpy(name, inName);
CString elem;
elem = (char *) NULL;
elem = strtok(name, "\\");
RESTRACKERWORK work;
memset(&work, 0, sizeof(work));
BOOL isOK = false;
CString resName = "";
while ((elem = strtok(NULL, "\\")) != "") {
if (isOK) {
RESTRACKERWORK child;
EnterDirectory(child, work);
work = child;
}
isOK = false;
while (EnumResource(resName, work) == 1) {
if (_stricmp(resName, elem) == 0 || _stricmp(resName, elem + "\\") == 0) {
isOK = true;
break;
}
}
if (!isOK)
return false;
}
free(name);
if (resName.Right(1) == "\\")
return false;
IMAGE_RESOURCE_DATA_ENTRY theEntryData;
mFile->Seek(mRsrcPtr + work.entry.OffsetToData, CFile::begin);
mFile->Read(&theEntryData, sizeof(theEntryData));
mStartPosition = theEntryData.OffsetToData - (mSectionHeaders[mRsrcIndex].VirtualAddress - mSectionHeaders[mRsrcIndex].PointerToRawData);
mLength = theEntryData.Size;
mFile->Seek(mStartPosition, CFile::begin);
return true;
}
/*virtual*/ unsigned long CPEFile::GetLength() {
return mLength;
}
/*virtual*/ unsigned long CPEFile::GetPosition() {
return mFile->GetPosition() - mStartPosition;
}
/*virtual*/ long CPEFile::Seek(long offset, unsigned int from) {
if (from == CFile::begin)
return mFile->Seek(offset + mStartPosition, from) - mStartPosition;
else
return mFile->Seek(offset, from) - mStartPosition;
}
/*virtual*/ unsigned int CPEFile::Read(void* buf, unsigned int len) {
int remaining = mLength - GetPosition();
if (remaining < 0 || len > remaining)
len = remaining;
return mFile->Read(buf, len);
}
/*virtual*/ void CPEFile::Write(void* buf, unsigned int len) {
int remaining = mLength - GetPosition();
if (remaining < 0 || len > remaining)
MessageBox(NULL, "CPEFile::Write overrun", "ERROR", MB_OK);
else
mFile->Write(buf, len);
}
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