获取PE文件的导出函数列表

关键字：PE文件,导出函数,PIMAGE_DOS_HEADER,PIMAGE_EXPORT_DIRECTORY,PIMAGE_NT_HEADER

函数作者为zhangjiawen@cchongda.com.cn，示例代码由ccrun(老妖)编写，应函数作者要求发表在本站。
一段可以从任何DLL中提取函数名的代码，这段代码的应用前提是该DLL文件对象没有经过任何“加壳”处理，否则，可能提取不完整。
#include "Dbghelp.h"

bool GetDLLFileExports(char *szFileName, UINT *nNoOfExports, char **&pszFunctions)
{
    HANDLE hFile;
    HANDLE hFileMapping;
    LPVOID lpFileBase;
    PIMAGE_DOS_HEADER pImg_DOS_Header;
    PIMAGE_NT_HEADERS pImg_NT_Header;
    PIMAGE_EXPORT_DIRECTORY pImg_Export_Dir;

    hFile = CreateFile(szFileName, GENERIC_READ, FILE_SHARE_READ,
            NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
    if(hFile == INVALID_HANDLE_VALUE)
        return false;

    hFileMapping = CreateFileMapping(hFile, NULL, PAGE_READONLY, 0, 0, NULL);
    if(hFileMapping == 0)
    {
        CloseHandle(hFile);
        return false;
    }

    lpFileBase = MapViewOfFile(hFileMapping, FILE_MAP_READ, 0, 0, 0);
    if(lpFileBase == 0)
    {
        CloseHandle(hFileMapping);
        CloseHandle(hFile);
        return false;
    }

    pImg_DOS_Header = (PIMAGE_DOS_HEADER)lpFileBase;
    pImg_NT_Header = (PIMAGE_NT_HEADERS)(
            (LONG)pImg_DOS_Header + (LONG)pImg_DOS_Header->e_lfanew);

    if(IsBadReadPtr(pImg_NT_Header, sizeof(IMAGE_NT_HEADERS))
            || pImg_NT_Header->Signature != IMAGE_NT_SIGNATURE)
    {
    UnmapViewOfFile(lpFileBase);
    CloseHandle(hFileMapping);
    CloseHandle(hFile);
    return false;
    }

    pImg_Export_Dir = (PIMAGE_EXPORT_DIRECTORY)pImg_NT_Header->OptionalHeader
            .DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress;
    if(!pImg_Export_Dir)
    {
    UnmapViewOfFile(lpFileBase);
    CloseHandle(hFileMapping);
    CloseHandle(hFile);
    return false;
    }
    // 63 63 72 75 6E 2E 63 6F 6D
    pImg_Export_Dir= (PIMAGE_EXPORT_DIRECTORY)ImageRvaToVa(pImg_NT_Header,
            pImg_DOS_Header, (DWORD)pImg_Export_Dir, 0);

    DWORD **ppdwNames = (DWORD **)pImg_Export_Dir->AddressOfNames;

    ppdwNames = (PDWORD*)ImageRvaToVa(pImg_NT_Header,
            pImg_DOS_Header, (DWORD)ppdwNames, 0);
    if(!ppdwNames)
    {
        UnmapViewOfFile(lpFileBase);
        CloseHandle(hFileMapping);
        CloseHandle(hFile);
        return false;
    }

    *nNoOfExports = pImg_Export_Dir->NumberOfNames;
    pszFunctions = new char*[*nNoOfExports];

    for(UINT i=0; i < *nNoOfExports; i++)
    {
        char *szFunc=(PSTR)ImageRvaToVa(pImg_NT_Header, pImg_DOS_Header, (DWORD)*ppdwNames, 0);

        pszFunctions[i] = new char[strlen(szFunc)+1];
        strcpy(pszFunctions[i],szFunc);

        ppdwNames++;
    }
    UnmapViewOfFile(lpFileBase);
    CloseHandle(hFileMapping);
    CloseHandle(hFile);
    return true;
}
//---------------------------------------------------------------------------
// 示例代码，读取C:/ccrun/123.dll中的导出函数列表并显示在Memo中
void __fastcall TForm1::Button1Click(TObject *Sender)
{
    UINT unNoOfExports;
    char **lppBuffer;

    GetDLLFileExports("C://ccrun//123.dll", &unNoOfExports, lppBuffer);

    for(UINT i=0; i        Memo1->Lines->Add(lppBuffer[i]);

    for(UINT i=0; i        delete []lppBuffer[i];

    delete []lppBuffer;
}