PE 移动/修复重定位表

下面的代码实现：

1、先移动了重定位表
2、然后修改重定位表结构指向移动后的重定位的地址
3、接着手动Imagebase自增1000
4、最后修复重定位表

重定位表的作用就是：当实际加载到内存中的Imagebase与本该加载时候的Imagebase地址不同的时候 就需要进行修复重定位表

其实重定位表中存的是需要修改的函数的地址偏移！

void MoveRelocationTable(PVOID pFileBuffer, PDWORD OldBufferSize,PVOID* pNewBuffer){
	PIMAGE_DOS_HEADER pImageDosHeader = NULL;
	PIMAGE_FILE_HEADER pImageFileHeader = NULL;
	PIMAGE_OPTIONAL_HEADER32 pImageOptionalHeader = NULL;
	PIMAGE_SECTION_HEADER pImageSectionHeaderGroup = NULL;
	PIMAGE_SECTION_HEADER NewSec = NULL;
	PIMAGE_BASE_RELOCATION pRelocationDirectory = NULL;
	
	DWORD isOk;
	DWORD NewLength=0;
	PVOID LastSection = NULL;
	PVOID CodeSection = NULL;
	PVOID AddressOfSectionTable = NULL;
	PVOID pTemp;

	DWORD AllSizeOfBlock = 0;
	DWORD RVA = 0;
	DWORD FOA = 0;

	int NumberOfRelocation=0;
	PWORD Location = NULL;
	int i = 0;
	DWORD RVA_Data;
	WORD reloData;



	pImageDosHeader = (PIMAGE_DOS_HEADER)pFileBuffer;
	pImageFileHeader = (PIMAGE_FILE_HEADER)((DWORD)pImageDosHeader + pImageDosHeader->e_lfanew + 4);
	pImageOptionalHeader = (PIMAGE_OPTIONAL_HEADER32)((DWORD)pImageFileHeader + sizeof(IMAGE_FILE_HEADER));
	pImageSectionHeaderGroup = (PIMAGE_SECTION_HEADER)((DWORD)pImageOptionalHeader + pImageFileHeader->SizeOfOptionalHeader);
	
	//判断是否可以容纳相应的节表
	isOk = (DWORD)pImageOptionalHeader->SizeOfHeaders - ((DWORD)pImageDosHeader->e_lfanew + IMAGE_SIZEOF_FILE_HEADER + pImageFileHeader->SizeOfOptionalHeader + 40*pImageFileHeader->NumberOfSections);
	if(isOk < 80){
		printf("空间太小 无法进行添加!");
		return;
	}
	
	//生成对应的内存大小的空间
	NewLength += *OldBufferSize + 0x1000;
	*pNewBuffer = (PVOID)malloc(NewLength);
	ZeroMemory(*pNewBuffer,NewLength);
	
	//拷贝之前内存空间 到 当前新生成的内存空间
	memcpy(*pNewBuffer,pFileBuffer,*OldBufferSize);
	
	//获取新的结构体
	pImageDosHeader = (PIMAGE_DOS_HEADER)(*pNewBuffer);
	pImageFileHeader = (PIMAGE_FILE_HEADER)((DWORD)pImageDosHeader + pImageDosHeader->e_lfanew + 4);
	pImageOptionalHeader = (PIMAGE_OPTIONAL_HEADER32)((DWORD)pImageFileHeader + sizeof(IMAGE_FILE_HEADER));
	pImageSectionHeaderGroup = (PIMAGE_SECTION_HEADER)((DWORD)pImageOptionalHeader + pImageFileHeader->SizeOfOptionalHeader);
	
	// pImageFileHeader->NumberOfSections修改
	pImageFileHeader->NumberOfSections = pImageFileHeader->NumberOfSections + 1;
	
	// pImageOptionalHeader->SizeOfImage修改
	pImageOptionalHeader->SizeOfImage = (DWORD)pImageOptionalHeader->SizeOfImage + 0x1000;
	
	// 复制代码段的节数据到 当前最后一个节数据后面
	CodeSection = (PVOID)(&pImageSectionHeaderGroup[0]);
	
	
	LastSection = (PVOID)(DWORD)(&pImageSectionHeaderGroup[pImageFileHeader->NumberOfSections-1]);
	memcpy(LastSection,CodeSection,40);
	
	//修正相关属性
	NewSec = (PIMAGE_SECTION_HEADER)LastSection;
	strcpy(NewSec,".NewSec");
	NewSec->Misc.VirtualSize = 0x1000;
	NewSec->SizeOfRawData = 0x1000;
	NewSec->VirtualAddress = pImageSectionHeaderGroup[pImageFileHeader->NumberOfSections-2].VirtualAddress + pImageSectionHeaderGroup[pImageFileHeader->NumberOfSections-2].SizeOfRawData;
	NewSec->PointerToRawData = pImageSectionHeaderGroup[pImageFileHeader->NumberOfSections-2].PointerToRawData + pImageSectionHeaderGroup[pImageFileHeader->NumberOfSections-2].SizeOfRawData;
	*OldBufferSize = NewLength;

	//到这里新增节已经完成了
	AddressOfSectionTable = (PVOID)((DWORD)*pNewBuffer + (DWORD)NewSec->PointerToRawData);
	
	//printf("%x",AddressOfSectionTable);

	//重定位表的FOA
	RVA_TO_FOA(*pNewBuffer,pImageOptionalHeader->DataDirectory[5].VirtualAddress,&FOA);
	
	//获取结构
	pRelocationDirectory = (PIMAGE_BASE_RELOCATION)((DWORD)*pNewBuffer + FOA);

	pTemp = pRelocationDirectory;
	
	//printf("%x",pRelocationDirectory->VirtualAddress);
	
	//获取重定位表大小
	while(pRelocationDirectory->SizeOfBlock && pRelocationDirectory->VirtualAddress){
		AllSizeOfBlock = pRelocationDirectory->SizeOfBlock;
		pRelocationDirectory = ((DWORD)pRelocationDirectory + (DWORD)pRelocationDirectory->SizeOfBlock);
	}
	
	//复制重定位表到新增的节数据中
	memcpy(AddressOfSectionTable,pTemp,AllSizeOfBlock);

	//将PE可选头中的重定位的地址指向新增节数据的起始地址
	pImageOptionalHeader->DataDirectory[5].VirtualAddress = (DWORD)AddressOfSectionTable;

	
	//修改DLL的ImageBase	
	//pImageOptionalHeader->ImageBase += 1000;

	//=============================================================
	//=============================================================
	//=============================================================
	//=============================================================

		
	printf("pRelocationDirectory_RVA:%x
",pImageOptionalHeader->DataDirectory[5].VirtualAddress);
	RVA_TO_FOA(pFileBuffer,pImageOptionalHeader->DataDirectory[5].VirtualAddress,&FOA);
	printf("pRelocationDirectory_FOA:%x
", FOA);
	
	pRelocationDirectory = (PIMAGE_BASE_RELOCATION)((DWORD)pFileBuffer+(DWORD)FOA); //定位第一张重定位表 文件中的地址
	
	while(pRelocationDirectory->SizeOfBlock && pRelocationDirectory->VirtualAddress){
		printf("VirtualAddress    :%08X
", pRelocationDirectory->VirtualAddress);
		printf("SizeOfBlock       :%08X
", pRelocationDirectory->SizeOfBlock);
		printf("================= BlockData Start ======================
");
		
		
		NumberOfRelocation = (pRelocationDirectory->SizeOfBlock - 8)/2;// 每个重定位块中的数据项的数量
		
		Location = (PWORD)((DWORD)pRelocationDirectory + 8); // 加上8个字节
		
		for(i=0;i<NumberOfRelocation;i++){
			if(Location[i] >> 12 != 0){ //判断是否是垃圾数据
				// WORD类型的变量进行接收
				reloData = (Location[i] & 0xFFF); //这里进行与操作 只取4字节 二进制的后12位
				RVA_Data = pRelocationDirectory->VirtualAddress + reloData; //这个是RVA的地址
				RVA_TO_FOA(pFileBuffer,RVA_Data,&FOA);
				printf("第[%04X]项  数据项的数据为:[%04X]  数据属性为:[%X]  RVA的地址为:[%08X]  重定位的数据:[%08X]
"
					,i+1
					,reloData
					,(Location[i] >> 12)
					,RVA_Data
					,*(PDWORD)((DWORD)pFileBuffer+(DWORD)FOA));

				//这里是自增的 进行修复重定位，上面的imagebase我们自增了1000，那么要修复的地址都需要自增1000
				*(PDWORD)((DWORD)pFileBuffer+(DWORD)FOA) = *(PDWORD)((DWORD)pFileBuffer+(DWORD)FOA) + 1000;				
			}
		}
		pRelocationDirectory = (PIMAGE_BASE_RELOCATION)((DWORD)pRelocationDirectory + (DWORD)pRelocationDirectory->SizeOfBlock); //上面的for循环完成之后，跳转到下个重定位块 继续如上的操作
	}

	//=============================================================
	//=============================================================
	//=============================================================
	//=============================================================
	//保存文件
	MyWriteFile(*pNewBuffer,NewLength);
}