读取PE结构中的数据目录项
中断了一段时间PE的学习，从昨天开始捡起来，研究了一下NT头里边的optionalheader的数据目录项，里边存放着很多重要的表的数据，想要解析那些表，就必须要能够解析这个数组。typedef struct _IMAGE_DATA_DIRECTORY {
DWORD VirtualAddress; //相对虚拟地址
DWORD Size; //大小
} IMAGE_DATA_DIRECTORY, *PIMAGE_DATA_DIRECTORY;
这是vs里边给出的定义，数据目录在winnt.h中的定义为
#define IMAGE_DIRECTORY_ENTRY_EXPORT 0 导出表
#define IMAGE_DIRECTORY_ENTRY_IMPORT 1 导入表
#define IMAGE_DIRECTORY_ENTRY_RESOURCE 2 资源目录
#define IMAGE_DIRECTORY_ENTRY_EXCEPTION 3 异常目录
#define IMAGE_DIRECTORY_ENTRY_SECURITY 4 安全目录
#define IMAGE_DIRECTORY_ENTRY_BASERELOC 5 重定位基本表
#define IMAGE_DIRECTORY_ENTRY_DEBUG 6 调试目录
#define IMAGE_DIRECTORY_ENTRY_COPYRIGHT 7 描术字串
#define IMAGE_DIRECTORY_ENTRY_GLOBALPTR 8 机器值
#define IMAGE_DIRECTORY_ENTRY_TLS 9 TLS目录
#define IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG 10 载入配值目录
#define IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT 11 绑定输入表
#define IMAGE_DIRECTORY_ENTRY_IAT 12 导入地址表
#define IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT13 延迟载入描述
#define IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR 14 COM信息
这是15个基本表，其实一共有16个但是第十六个保留不适用所以没有写，想要用代码找必须要会手动查找。这里我是用的软件是windows自带的notepad工具为UltraEdit
https://www.52hb.com/forum.php?mod=image&aid=107679&size=300x300&key=3412453d41927bc8&nocache=yes&type=fixnone
通过查询PE文件结构可以知道，数据目录项在节表上方，16项每项的大小为8个字节，所以从节表开始出向上找8行。（但是这个地方我有点不理解为什么是virtualaddress在前，size在后边，看定义的时候位置是相反的。）
手动找到完成之后开始使用代码写，大体步骤为：
1、将文件读到缓冲区。
2、定义每个pe头的信息。
3、定义数据目录项指针将指针指向数据目录项、
4、打印信息。
代码为：VOID DirectoryPrintf()
{
PIMAGE_DOS_HEADER pDosHeader = NULL;
PIMAGE_NT_HEADERS pNTHeader = NULL;
PIMAGE_FILE_HEADER pFileHeader = NULL;
PIMAGE_OPTIONAL_HEADER pOptionalHeader = NULL;
PIMAGE_DATA_DIRECTORY pDirectory = NULL;
BYTE Length = 8;//本来是想通过加上长度来移动指针，发现不可以 这个地方忽略
LPVOID pFileBuffer = NULL;
ReadPEFile(INFILEPATH, &pFileBuffer);
//判断读取文件是否成功
if (!pFileBuffer){
printf("读取文件失败");
free(pFileBuffer);
return;
}
//如果读取成功进行操作
pDosHeader = (PIMAGE_DOS_HEADER)pFileBuffer;
pNTHeader = (PIMAGE_NT_HEADERS)((DWORD)pFileBuffer + pDosHeader->e_lfanew);
pFileHeader = (PIMAGE_FILE_HEADER)(((DWORD)pNTHeader) + 4);
pOptionalHeader = (PIMAGE_OPTIONAL_HEADER)((DWORD)pFileHeader + IMAGE_SIZEOF_FILE_HEADER);
pDirectory = (PIMAGE_DATA_DIRECTORY)(((DWORD)pOptionalHeader) + 96);
//输出各种表的信息~
printf("导出表：size: %x virtualaddress: %x\n",pDirectory->Size, pDirectory->VirtualAddress);
printf("=====================================\n");
pDirectory++;
printf("导入表：SIZE：%xvirtualaddress：%x\n", pDirectory->Size,pDirectory->VirtualAddress);
printf("=====================================\n");
pDirectory++;
printf("资源目录：Size %xVirtualAddress: %x\n", pDirectory->Size, pDirectory->VirtualAddress);
printf("=====================================\n");
pDirectory++;
printf("异常目录：Size %xVirtualAddress: %x\n", pDirectory->Size, pDirectory->VirtualAddress);
printf("=====================================\n");
pDirectory++;
printf("安全目录：Size %xVirtualAddress: %x\n", pDirectory->Size, pDirectory->VirtualAddress);
printf("=====================================\n");
pDirectory++;
printf("重定位基本表：Size %xVirtualAddress: %x\n", pDirectory->Size, pDirectory->VirtualAddress);
printf("=====================================\n");
pDirectory++;
printf("调试目录：Size %xVirtualAddress: %x\n", pDirectory->Size, pDirectory->VirtualAddress);
printf("=====================================\n");
pDirectory++;
printf("描述字串：Size %xVirtualAddress: %x\n", pDirectory->Size, pDirectory->VirtualAddress);
printf("=====================================\n");
pDirectory++;
printf("机器值：Size %xVirtualAddress: %x\n", pDirectory->Size, pDirectory->VirtualAddress);
printf("=====================================\n");
pDirectory++;
printf("TLS目录：Size %xVirtualAddress: %x\n", pDirectory->Size, pDirectory->VirtualAddress);
printf("=====================================\n");
pDirectory++;
printf("载入配值目录：Size %xVirtualAddress: %x\n", pDirectory->Size, pDirectory->VirtualAddress);
printf("=====================================\n");
pDirectory++;
printf("绑定输入表：Size %xVirtualAddress: %x\n", pDirectory->Size, pDirectory->VirtualAddress);
printf("=====================================\n");
pDirectory++;
printf("导入地址表：Size %xVirtualAddress: %x\n", pDirectory->Size, pDirectory->VirtualAddress);
printf("=====================================\n");
pDirectory++;
printf("延迟载入描述：Size %xVirtualAddress: %x\n", pDirectory->Size, pDirectory->VirtualAddress);
printf("=====================================\n");
pDirectory++;
printf("COM信息：Size %xVirtualAddress: %x\n", pDirectory->Size, pDirectory->VirtualAddress);
printf("=====================================\n");
pDirectory++;
printf("未使用的表：Size %xVirtualAddress: %x\n", pDirectory->Size, pDirectory->VirtualAddress);
printf("=====================================\n");
free(pFileBuffer);
}
运行结果为：
https://www.52hb.com/forum.php?mod=image&aid=107680&size=300x300&key=d2358c82ce6ed7a6&nocache=yes&type=fixnone
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