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|
/* DllExportParser.cpp : Defines the entry point for the console application.
** Neitsa pour DVP **
Extrait les fonctions exportées par une DLL.
Usage : passer le chemin complet de la DLL à l'exécutable.
ex: DllExportParsser.exe c:\windows\system32\kernel32.dll > out.txt
*/
#include "stdafx.h"
#include <windows.h>
#include <time.h>
typedef struct _HANDLES {
HANDLE hFile;
HANDLE hMapping;
LPVOID pMapping;
} HANDLES, *PHANDLES;
BOOL MapFile(TCHAR* fileName, HANDLES* handles);
PIMAGE_NT_HEADERS CheckPeValidity(HANDLES* handles);
BOOL DumpExports(HANDLES* handles, PIMAGE_NT_HEADERS ImageNtHeaders);
void CleanAll (HANDLES* handles);
int _tmain(int argc, _TCHAR* argv[])
{
HANDLES handles;
PIMAGE_NT_HEADERS pINH = NULL;
if(argc == 2)
{
memset(&handles, 0, sizeof(handles));
if(MapFile(argv[1], &handles))
{
pINH = CheckPeValidity(&handles);
if(pINH != NULL)
{
DumpExports(&handles, pINH);
}
}
CleanAll(&handles);
}
else
_tprintf(_T("Usage :\nDllExportParser.exe dll_full_path"));
return 0;
}
BOOL MapFile(TCHAR* fileName, HANDLES* handles)
{
DWORD FileSize = 0;
//open the DLL file
handles->hFile = CreateFile(fileName, GENERIC_READ, FILE_SHARE_READ, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
if (handles->hFile == INVALID_HANDLE_VALUE)
{
printf("Can't open the required file");
return FALSE;
}
// get the DLL size
FileSize = GetFileSize (handles->hFile, NULL);
if (FileSize == 0)
{
//Error handling
CleanAll (handles);
printf("FileSize is 0 !");
return FALSE;
}
handles->hMapping = CreateFileMapping (handles->hFile, NULL, PAGE_READONLY | SEC_IMAGE, 0, 0, NULL);
if (handles->hMapping == NULL)
{
//error handling
CleanAll (handles);
printf("Can't create the file mapping !");
return FALSE;
}
handles->pMapping = MapViewOfFile (handles->hMapping, FILE_MAP_READ, 0, 0, 0);
if (handles->pMapping == NULL)
{
//error handling
CleanAll (handles);
printf("Can't map the requested file !");
return FALSE;
}
return TRUE;
}
PIMAGE_NT_HEADERS CheckPeValidity(HANDLES* handles)
{
PIMAGE_DOS_HEADER ImageDosHeader = NULL;
PIMAGE_NT_HEADERS ImageNtHeaders = NULL;
//cast pMapping to IMAGE_DOS_HEADER
ImageDosHeader = (PIMAGE_DOS_HEADER)handles->pMapping;
//test if the DLL is really a PE (portable executable) file
if (ImageDosHeader->e_magic != IMAGE_DOS_SIGNATURE)
{
//error handling
CleanAll (handles);
printf("This file isn't a PE file !\n\n Wrong IMAGE_DOS_SIGNATURE");
return NULL;
}
ImageNtHeaders = (PIMAGE_NT_HEADERS)(ImageDosHeader->e_lfanew + (DWORD) ImageDosHeader);
//test if the NT_SIGNATURE is ok
if (ImageNtHeaders->Signature != IMAGE_NT_SIGNATURE)
{
//error handling
CleanAll (handles);
printf("This file isn't a PE file !\n\n Wrong IMAGE_NT_SIGNATURE");
return NULL;
}
return ImageNtHeaders;
}
BOOL DumpExports(HANDLES* handles, PIMAGE_NT_HEADERS ImageNtHeaders)
{
DWORD ImageBase, ExportTableRVA, NumOfNames, ExportTableSize, ETUpperBoundary;
unsigned int i = 0;
PIMAGE_EXPORT_DIRECTORY ImageExportDirectory = NULL;
PWORD pOrdinals = NULL;
PDWORD pFuncs = NULL;
//pMapping is the ImageBase of the file
ImageBase = (DWORD)handles->pMapping;
//required file has passed all tests. Now get the ExportTable RVA
ExportTableRVA = ImageNtHeaders->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress;
if (ExportTableRVA == 0)
{
//we got a problem...
CleanAll (handles);
printf("Export table not found !");
return FALSE;
}
// add the Export table RVA and image base to get IED (IMAGE_EXPORT_DIRECTORY)
ImageExportDirectory = (PIMAGE_EXPORT_DIRECTORY) (ExportTableRVA + ImageBase);
//Print all infos from Export directory
_tprintf (_T("TimeDateStamp: 0x%08lX - "), ImageExportDirectory->TimeDateStamp);
_tprintf (_tctime( (time_t*)&ImageExportDirectory->TimeDateStamp ));
printf("\nDLL name : %s\n", ImageExportDirectory->Name + ImageBase);
_tprintf (
_T("Major Version: %i\n")
_T("Minor Version: %i\n")
_T("Name RVA: 0x%08lX\n")
_T("Ordinal Base: 0x%08lX\n")
_T("Address Table Entries: %d\n")
_T("Number of Name Pointers: %d\n")
_T("Export Table Address RVA: 0x%08lX\n")
_T("Name Pointer RVA: 0x%08lX\n")
_T("Ordinal Table RVA: 0x%08lX\n"),
ImageExportDirectory->MajorVersion,
ImageExportDirectory->MinorVersion,
ImageExportDirectory->Name,
ImageExportDirectory->Base,
ImageExportDirectory->NumberOfFunctions,
ImageExportDirectory->NumberOfNames,
ImageExportDirectory->AddressOfFunctions,
ImageExportDirectory->AddressOfNames,
ImageExportDirectory->AddressOfNameOrdinals);
pOrdinals = (PWORD) (ImageExportDirectory->AddressOfNameOrdinals + ImageBase);//ordinal pointer
pFuncs = (PDWORD) (ImageExportDirectory->AddressOfFunctions + ImageBase);//func pointer
NumOfNames = ImageExportDirectory->NumberOfNames;
//get the export table size in PE header (needed for testing if func is forwarded)
ExportTableSize = ImageNtHeaders->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].Size;
ETUpperBoundary = ExportTableRVA + ExportTableSize;
//parse the export table and retrieve each function ordinal's.
for (i = 0; i < ImageExportDirectory->NumberOfFunctions; i++)
{
_tprintf (_T("\nOrd: %04lX (0x%08lX)"), ImageExportDirectory->Base + i, pFuncs[i]);
//parse the export table and retrieve the function name's IF it exists !
if (pOrdinals[i] < NumOfNames)
{
PDWORD pNamePointerRVA =(PDWORD)(ImageExportDirectory->AddressOfNames + ImageBase);
PCHAR pFuncName = (PCHAR) (pNamePointerRVA[i] + (DWORD) ImageBase);
printf (" - %s", pFuncName);
//now test if the function is forwarded (see pecoff and "Russ Osterlund" papers about that)
if ( (pFuncs[i] >= ExportTableRVA) && (pFuncs[i] <= ETUpperBoundary) )
{
//func is forwarded !
PDWORD pFwdFunc = (PDWORD) (pFuncs[i] + (DWORD)ImageBase);
printf (" - Fwd to: %s", pFwdFunc);
}
}
}
return TRUE;
}
// release handles
void CleanAll (HANDLES* handles)
{
if (handles->hFile != NULL){
CloseHandle (handles->hFile);
}
if (handles->pMapping != NULL){
UnmapViewOfFile (handles->pMapping);
}
if (handles->hMapping != NULL){
CloseHandle (handles->hMapping);
}
} |
enumeration contenu DLL via API win32
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Envoyé par sebkramm
C'est une blague j'espère. As-tu déjà au moins lu 
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