PE导出导出表

最新推荐文章于 2025-05-05 17:52:01 发布

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本文详细介绍了在C++程序中如何通过提供的入口点函数实现导出函数的功能，包括检查模块头文件和导入库，以及如何通过模块地址和函数名获取实际的函数地址。

// export_test.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include "windows.h"
int export_jixi(unsigned long pmodule ,char *function)
{
 if(pmodule == 0)
  return -1;
 if(IMAGE_DOS_SIGNATURE != *(unsigned short*)pmodule)
  return -1;
 unsigned long peheader=pmodule + *(unsigned long*)(pmodule + 0x3C);
 if(IMAGE_NT_SIGNATURE != *(unsigned long*)peheader)
  return -1;
 unsigned long export=*(unsigned long*)(peheader + 0x78) + pmodule;
 if(export == pmodule)
  return -1;
 unsigned long base=0;
 unsigned long numoffunction=0;
 unsigned long numofname=0;
 unsigned long *addrofname=NULL;
 unsigned long *addroffunction=NULL;
 unsigned short *addroforgname=NULL;
 //printf("base:%d name:%s\r\n" ,*(unsigned long*)(export+0x10) ,*(unsigned long*)(export+0x0C)+pmodule);
 numoffunction = *(unsigned long*)(export + 0x14);
 numofname = *(unsigned long*)(export + 0x18);
 //printf("numoffunction :%d ,numofname :%d \r\n" ,numoffunction ,numofname);
 addrofname = (unsigned long*)(*(unsigned long*)(export + 0x20) + pmodule);
 addroforgname = (unsigned short*)(*(unsigned long*)(export + 0x24) + pmodule);
 addroffunction = (unsigned long*)(*(unsigned long*)(export + 0x1C) + pmodule);
 int index=0;
 for (int i=0 ;i<numofname ;i++)
 {
  if(!strncmp(function ,(char*)(addrofname[i]+pmodule) ,strlen(function)))
  {
    index =base + addroforgname[i];
    return addroffunction[index] + pmodule;
  }
 }
 return 0;
 
}
int main(int argc, char* argv[])
{
 HMODULE hlib=LoadLibrary("kernel32");
 printf("%x\r\n" ,export_jixi((unsigned long)hlib ,"GetProcAddress"));
 return 0;
}