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Copy pathImportTable.cpp
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178 lines (135 loc) · 4.96 KB
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#include "stdafx.h"
typedef struct _MMP_IAT_HANDLE {
HMODULE hModule;
PMM_IAT_RESOLVER lpResolver;
}MMP_IAT_HANDLE, * PMMP_IAT_HANDLE;
HMODULE MmpLoadLibraryA(
_In_ LPCSTR lpModuleName,
_Out_ PMM_IAT_RESOLVER* lpModuleResolver) {
HMODULE hModule = nullptr;
PMM_IAT_RESOLVER resolver = nullptr;
EnterCriticalSection(&MmpGlobalDataPtr->MmpIat->MmpIatResolverListLock);
PLIST_ENTRY lpResolver = MmpGlobalDataPtr->MmpIat->MmpIatResolverList.Flink;
while (lpResolver != &MmpGlobalDataPtr->MmpIat->MmpIatResolverList) {
PMM_IAT_RESOLVER entry = CONTAINING_RECORD(lpResolver, MM_IAT_RESOLVER, MM_IAT_RESOLVER::InMmpIatResolverList);
hModule = entry->LoadLibraryProv(lpModuleName);
if (hModule) {
resolver = entry;
++entry->ReferenceCount;
break;
}
lpResolver = lpResolver->Flink;
}
LeaveCriticalSection(&MmpGlobalDataPtr->MmpIat->MmpIatResolverListLock);
*lpModuleResolver = resolver;
return hModule;
}
VOID MemoryFreeImportTable(_In_ PMEMORYMODULE hMemoryModule) {
EnterCriticalSection(&MmpGlobalDataPtr->MmpIat->MmpIatResolverListLock);
PMMP_IAT_HANDLE list = (PMMP_IAT_HANDLE)hMemoryModule->hModulesList;
for (DWORD i = 0; i < hMemoryModule->dwModulesCount; ++i) {
auto entry = list[i];
entry.lpResolver->FreeLibraryProv(entry.hModule);
--entry.lpResolver->ReferenceCount;
}
LeaveCriticalSection(&MmpGlobalDataPtr->MmpIat->MmpIatResolverListLock);
RtlFreeHeap(NtCurrentPeb()->ProcessHeap, 0, hMemoryModule->hModulesList);
hMemoryModule->hModulesList = nullptr;
hMemoryModule->dwModulesCount = 0;
}
NTSTATUS MemoryResolveImportTable(
_In_ LPBYTE base,
_In_ PIMAGE_NT_HEADERS lpNtHeaders,
_In_ PMEMORYMODULE hMemoryModule) {
NTSTATUS status = STATUS_SUCCESS;
PIMAGE_IMPORT_DESCRIPTOR importDesc = nullptr;
DWORD count = 0;
do {
__try {
PIMAGE_DATA_DIRECTORY dir = &lpNtHeaders->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT];
PIMAGE_IMPORT_DESCRIPTOR iat = nullptr;
if (dir && dir->Size) {
iat = importDesc = PIMAGE_IMPORT_DESCRIPTOR(lpNtHeaders->OptionalHeader.ImageBase + dir->VirtualAddress);
}
if (iat) {
while (iat->Name) {
++count;
++iat;
}
}
if (importDesc && count) {
PMMP_IAT_HANDLE handles = (PMMP_IAT_HANDLE)RtlAllocateHeap(NtCurrentPeb()->ProcessHeap, HEAP_ZERO_MEMORY, sizeof(MMP_IAT_HANDLE) * count);
hMemoryModule->hModulesList = handles;
if (!hMemoryModule->hModulesList) {
status = STATUS_NO_MEMORY;
break;
}
for (DWORD i = 0; i < count; ++i, ++importDesc) {
uintptr_t* thunkRef;
FARPROC* funcRef;
PMM_IAT_RESOLVER resolver;
HMODULE handle = MmpLoadLibraryA((LPCSTR)(base + importDesc->Name), &resolver);
if (!handle) {
status = STATUS_DLL_NOT_FOUND;
break;
}
handles[hMemoryModule->dwModulesCount].hModule = handle;
handles[hMemoryModule->dwModulesCount++].lpResolver = resolver;
thunkRef = (uintptr_t*)(base + (importDesc->OriginalFirstThunk ? importDesc->OriginalFirstThunk : importDesc->FirstThunk));
funcRef = (FARPROC*)(base + importDesc->FirstThunk);
while (*thunkRef) {
*funcRef = GetProcAddress(
handle,
IMAGE_SNAP_BY_ORDINAL(*thunkRef) ? (LPCSTR)IMAGE_ORDINAL(*thunkRef) : (LPCSTR)PIMAGE_IMPORT_BY_NAME(base + (*thunkRef))->Name
);
if (!*funcRef) {
status = STATUS_ENTRYPOINT_NOT_FOUND;
break;
}
++thunkRef;
++funcRef;
}
if (!NT_SUCCESS(status))break;
}
}
}
__except (EXCEPTION_EXECUTE_HANDLER) {
status = GetExceptionCode();
}
} while (false);
if (!NT_SUCCESS(status)) {
MemoryFreeImportTable(hMemoryModule);
}
return status;
}
HANDLE WINAPI MmRegisterImportTableResolver(
_In_ MM_IAT_RESOLVER_ENTRY LoadLibraryProv,
_In_ MM_IAT_FREE_ENTRY FreeLibraryProv) {
HANDLE heap = RtlProcessHeap();
PMM_IAT_RESOLVER resolver = (PMM_IAT_RESOLVER)RtlAllocateHeap(heap, 0, sizeof(MM_IAT_RESOLVER));
if (resolver) {
EnterCriticalSection(&MmpGlobalDataPtr->MmpIat->MmpIatResolverListLock);
resolver->ReferenceCount = 1;
resolver->LoadLibraryProv = LoadLibraryProv;
resolver->FreeLibraryProv = FreeLibraryProv;
InsertTailList(&MmpGlobalDataPtr->MmpIat->MmpIatResolverList, &resolver->InMmpIatResolverList);
LeaveCriticalSection(&MmpGlobalDataPtr->MmpIat->MmpIatResolverListLock);
}
return resolver;
}
_Success_(return)
BOOL WINAPI MmRemoveImportTableResolver(_In_ HANDLE hMmIatResolver) {
HANDLE heap = RtlProcessHeap();
if (hMmIatResolver == &MmpGlobalDataPtr->MmpIat->MmpIatResolverHead) {
return FALSE;
}
PMM_IAT_RESOLVER resolver = CONTAINING_RECORD(hMmIatResolver, MM_IAT_RESOLVER, MM_IAT_RESOLVER::InMmpIatResolverList);
EnterCriticalSection(&MmpGlobalDataPtr->MmpIat->MmpIatResolverListLock);
if (resolver->ReferenceCount > 1) {
LeaveCriticalSection(&MmpGlobalDataPtr->MmpIat->MmpIatResolverListLock);
return FALSE;
}
RemoveHeadList(&resolver->InMmpIatResolverList);
LeaveCriticalSection(&MmpGlobalDataPtr->MmpIat->MmpIatResolverListLock);
return RtlFreeHeap(heap, 0, hMmIatResolver);
}