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#pragma once
#include <string>
#include <Windows.h>
typedef void(*LibEntry_FN)(void);
static inline bool LoadAndTestLibraryEntry(const char * const fullDllPath);
bool VerifyPeHeader(UINT8 const * const buf, SIZE_T siz, IMAGE_NT_HEADERS ** const return_NTHeader);
class DLLHelper
{
public:
DLLHelper();
~DLLHelper();
bool Init(HANDLE targetPID, const char * const fullDllPath);
bool VerifyHeader();
bool InitTargetMemory();
bool HasImports() {
return m_NTHeader &&
m_NTHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT].Size;
}
bool FixImports();
bool HasRelocs() {
return m_NTHeader &&
m_NTHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC].Size;
}
bool FixRelocs();
bool CopyHeaderAndSections();
UINT64 GetEntryPoint() {
if (!m_NTHeader) {
return 0;
}
return (UINT64)m_TargetBaseAddress + m_NTHeader->OptionalHeader.AddressOfEntryPoint;
}
UINT64 GetBaseAddress() {
return (UINT64)m_TargetBaseAddress;
}
UINT64 GetDllProcAddress(const char * const proc_name) {
HMODULE hBase = LoadLibraryA(m_DLLPath.c_str());
FARPROC hEntry = GetProcAddress(hBase, proc_name);
UINT64 result = ((UINT64)hEntry - (UINT64)hBase) + (UINT64)m_TargetBaseAddress;
FreeLibrary(hBase);
return result;
}
private:
HANDLE m_TargetPID = 0;
std::string m_DLLPath;
DWORD m_DLLSize = 0;
UINT8 *m_DLLPtr = nullptr;
IMAGE_NT_HEADERS *m_NTHeader = nullptr;
PVOID m_TargetBaseAddress = nullptr;
};
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