EXE的拉伸

#include<stdio.h>
#include<Windows.h>
struct
{
	PIMAGE_DOS_HEADER pDosHeader;
	PIMAGE_FILE_HEADER pFileHeader;
	PIMAGE_OPTIONAL_HEADER pOptionHeader;
	PIMAGE_SECTION_HEADER pSectionHeader;
}phead;
void initData(LPVOID pbuffer)
{
	phead.pDosHeader = (PIMAGE_DOS_HEADER) pbuffer; //基址    void* 无类型指针无法进行加减就是因为不知道步长；注意指针的加减 的步长 
	phead.pFileHeader = (PIMAGE_FILE_HEADER)((char*)pbuffer + phead.pDosHeader->e_lfanew + 4);
	phead.pOptionHeader = (PIMAGE_OPTIONAL_HEADER)((char*)pbuffer+phead.pDosHeader->e_lfanew + 24);
	phead.pSectionHeader = (PIMAGE_SECTION_HEADER)((char*)phead.pOptionHeader + 224);
	//printf("%x", phead.pSectionHeader->VirtualAddress);
}
void ReadToFileBuffer(LPVOID *pbuffer)
{
	const char * path = "C:\\Users\\我\\Desktop\\gifcam.exe";
	FILE* fp = fopen(path, "rb+");
	if (fp == NULL)
		printf(" file fail open");
	fseek(fp, 0, SEEK_END);
	unsigned int  Size = ftell(fp);
	
	*pbuffer = malloc(Size);
	memset(*pbuffer, 0, Size);
	//printf("%u", Size);
	fseek(fp, 0, SEEK_SET);
	fread(*pbuffer, Size, 1, fp);
	fclose(fp);

}
void FilebufToImagebuf(LPVOID *pDesbuffer,LPVOID pSrcbuffer)
{
	PIMAGE_SECTION_HEADER temp;
	temp = phead.pSectionHeader;
	*pDesbuffer = malloc(phead.pOptionHeader->SizeOfImage);
	memset(*pDesbuffer, 0, phead.pOptionHeader->SizeOfImage);
	memcpy(*pDesbuffer, pSrcbuffer, phead.pOptionHeader->SizeOfHeaders);
	for (int i = 0; i < phead.pFileHeader->NumberOfSections; i++)
	{
		memcpy((char*)*pDesbuffer + temp->VirtualAddress,
			(char*)pSrcbuffer + temp->PointerToRawData,
			temp->SizeOfRawData);
		temp += 1;
	}
}
void WriteBufToFile(LPVOID pbuffer)
{
	FILE* fp;
	const char* path = "C:\\Users\\我\\Desktop\\Strectchgifcam.exe";
	fp = fopen(path, "wb+");
	fwrite(pbuffer, sizeof(char), phead.pOptionHeader->SizeOfImage, fp);
	fclose(fp);
}
int main()
{ 
	byte *FileBuffer;
	byte *ImageBuffer;
	ReadToFileBuffer(&FileBuffer);
	initData(FileBuffer);
	FilebufToImagebuf(&ImageBuffer, FileBuffer);
	WriteBufToFile(ImageBuffer);
	free(FileBuffer);
	free(ImageBuffer);
	_asm{
		nop
		nop
	}
	
}