今天逆向破解firefox浏览器中保存的账号及密码，因为firefox对账号的信息不断的提高安全性，所以之前破解中需要用到的一个导出函数不知被封装到那个dll中了，但firefox安装目录下又有许多的dll，一个一个的使用loadPe工具去查找太麻烦了，于是就编写了一个小程序去遍历文件夹下所有的dll的导出表中的函数名称并打印出来。

头文件：

#include <Windows.h>
#include <stdio.h>
#include <imagehlp.h>
#pragma comment(lib, "imagehlp.lib ")

void ShowExportFuncsInfo( char* szName )
{
	HANDLE hFile;
	HANDLE hMapping;
	LPVOID ImageBase;
	DWORD dwDataStartRVA;
	PIMAGE_DOS_HEADER  pDH;
	PIMAGE_NT_HEADERS pNtH= NULL;
	PIMAGE_OPTIONAL_HEADER pOH= NULL;
	PIMAGE_EXPORT_DIRECTORY pExportDir= NULL;
	PDWORD                  pdwRvas, pdwNames;
	PWORD                   pwOrds;
	UINT                    iNumOfName=0;
	char					*szFuncName; 
	BOOL                    bIsByName=FALSE;;
	
	hFile=CreateFile(szName,GENERIC_READ,FILE_SHARE_READ,NULL,OPEN_EXISTING, 
		FILE_ATTRIBUTE_NORMAL,0);
	if (!hFile)				   
		return ;
	hMapping=CreateFileMapping(hFile,NULL,PAGE_READONLY,0,0,NULL);
	if(!hMapping)
	{									
		CloseHandle(hFile);
		return ;
	}
	ImageBase=MapViewOfFile(hMapping,FILE_MAP_READ,0,0,0);
    if(!ImageBase)
	{									
		CloseHandle(hMapping);
		CloseHandle(hFile);
		return ;
	}
	
	pDH=(PIMAGE_DOS_HEADER)ImageBase;
	if(pDH->e_magic!=IMAGE_DOS_SIGNATURE)
		return ;
	
    pNtH=(PIMAGE_NT_HEADERS32)((DWORD)pDH+pDH->e_lfanew);
    if (pNtH->Signature != IMAGE_NT_SIGNATURE )
        return ;
	
	pOH=&pNtH->OptionalHeader;
	if(!pOH)
		return ;
    dwDataStartRVA=pOH->DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress;
	if(!dwDataStartRVA)
        return ;
	
	pExportDir=(PIMAGE_EXPORT_DIRECTORY)ImageRvaToVa(pNtH,ImageBase,dwDataStartRVA, NULL);
	if(!pExportDir)
		return ;
	
	pwOrds    = (PWORD)ImageRvaToVa(pNtH,  ImageBase,pExportDir->AddressOfNameOrdinals, NULL);
	pdwRvas   = (PDWORD)ImageRvaToVa(pNtH, ImageBase,pExportDir->AddressOfFunctions, NULL);
	pdwNames  = (PDWORD)ImageRvaToVa(pNtH, ImageBase,pExportDir->AddressOfNames, NULL);
	
	iNumOfName=pExportDir->NumberOfNames;
	for(int i=0;i<pExportDir->NumberOfFunctions;i++)
	{
		if(*pdwRvas)
		{    
			for(int j=0;j<iNumOfName;j++)
			{
				if(i==pwOrds[j])
				{  
					bIsByName=TRUE;
					szFuncName=(char*)ImageRvaToVa(pNtH,ImageBase,pdwNames[j], NULL);
					break;
				}
				
				bIsByName=FALSE;
			}
			
			printf("%04lX\t%08lX\t%s\n", (UINT)(pExportDir->Base+i), (*pdwRvas), szFuncName);
		}
		++pdwRvas;
	}
	
	if(ImageBase)
		UnmapViewOfFile(ImageBase);
	
	if(hMapping)
		CloseHandle(hMapping);
	
	if(hFile)
		CloseHandle(hFile);
	
}

int main()
{
	WIN32_FIND_DATA FindData;
	HANDLE hFind;
	char FilePathName[MAX_PATH];
	char FullPathName[MAX_PATH];

	if (__argc !=2)
	{
		return 0;
	}

	strcpy(FilePathName, __argv[1]);
	strcat(FilePathName, "\\*.dll");
	hFind = FindFirstFile(FilePathName, &FindData);
	if (hFind == INVALID_HANDLE_VALUE)
	{
		return 0;
	}
	while(::FindNextFile(hFind, &FindData))
	{
		if (strcmp(FindData.cFileName, ".") == 0 
			|| strcmp(FindData.cFileName, "..") == 0 )
		{
			continue;
		}
		
		if (FindData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
		{
			continue;
		}

		sprintf(FullPathName, "%s\\%s", __argv[1],FindData.cFileName);
		printf("\n%s\n", FullPathName);
		
		ShowExportFuncsInfo(FullPathName);
	}
	
	getchar();
	return 0;
}