Вы просто делаете это неправильно.Я написал некоторый код для вас, надеюсь, это поможет. Он может показать данные последнего раздела PE-файла.
#include <stdio.h>
#include <malloc.h>
#include <windows.h>
void ShowHexData(BYTE *ptr,DWORD len)
{
int index = 0;
int i = 0;
const int width = 16;
while(index + width < len)
{
int i;
for(i = 0; i < width; ++i)
{
printf(" %02X",ptr[index + i]);
}
printf(" \t");
for(i = 0; i < width; ++i)
{
if(ptr[index + i] >= 0x20 &&
ptr[index + i] <= 0x7F)
{
putchar(ptr[index + i]);
}else{
putchar('.');
}
}
index += width;
putchar('\n');
}
for(i = 0; index + i < len; ++ i)
{
printf(" %02X",ptr[index + i]);
}
while(i < width)
{
printf(" ");
i += 1;
}
printf(" \t");
for(i = 0; index + i < len; ++ i)
{
if(ptr[index + i] >= 0x20 &&
ptr[index + i] <= 0x7F)
{
putchar(ptr[index + i]);
}else{
putchar('.');
}
}
putchar('\n');
}
int main(int argc, char *argv[])
{
if(argc != 2)
{
printf("Usage : %s filename\n",argv[0]);
return -1;
}else{
FILE *fp = fopen(argv[1],"rb");
IMAGE_DOS_HEADER DosHeader = {0};
IMAGE_FILE_HEADER FileHeader = {0};
IMAGE_SECTION_HEADER SectionHeader = {0};
DWORD Signature = 0;
DWORD RawPointerToPeHeader = 0, SizeOfFile = 0;
DWORD SectionCount = 0;
DWORD ByteCount = 0;
BYTE *pData = NULL;
if(!fp)
{
perror("");
return -1;
}
fseek(fp,0,SEEK_END);
SizeOfFile = ftell(fp);
if(SizeOfFile <
sizeof(IMAGE_DOS_HEADER) + sizeof(IMAGE_NT_HEADERS))
goto not_pe_file;
fseek(fp,0,SEEK_SET);
fread(&DosHeader,1,sizeof DosHeader,fp);
if(DosHeader.e_magic != 'M' + 'Z' * 256)
goto not_pe_file;
RawPointerToPeHeader = DosHeader.e_lfanew;
if(SizeOfFile <=
RawPointerToPeHeader + sizeof(IMAGE_NT_HEADERS))
goto not_pe_file;
fseek(fp,RawPointerToPeHeader,SEEK_SET);
fread(&Signature,1,sizeof(DWORD),fp);
if(Signature != 'P' + 'E' * 256)
goto not_pe_file;
fread(&FileHeader,1,sizeof FileHeader,fp);
if(FileHeader.SizeOfOptionalHeader !=
sizeof(IMAGE_OPTIONAL_HEADER))
goto not_pe_file;
SectionCount = FileHeader.NumberOfSections;
if(SectionCount == 0)
{
printf("No section for this file.\n");
fclose(fp);
return -1;
}
if(SizeOfFile <=
RawPointerToPeHeader +
sizeof(IMAGE_NT_HEADERS) +
SectionCount * sizeof(IMAGE_SECTION_HEADER))
goto not_pe_file;
fseek(fp,
RawPointerToPeHeader + sizeof(IMAGE_NT_HEADERS) +
(SectionCount - 1) * sizeof(IMAGE_SECTION_HEADER),
SEEK_SET);
fread(&SectionHeader,1,sizeof SectionHeader,fp);
ByteCount = SectionHeader.Misc.VirtualSize < SectionHeader.PointerToRawData ?
SectionHeader.Misc.VirtualSize : SectionHeader.PointerToRawData;
if(ByteCount == 0)
{
printf("No data to read for target section.\n");
fclose(fp);
return -1;
}else if(ByteCount + SectionHeader.PointerToRawData > SizeOfFile)
{
printf("Bad section data.\n");
fclose(fp);
return -1;
}
fseek(fp,SectionHeader.PointerToRawData,SEEK_SET);
pData = (BYTE*)malloc(ByteCount);
fread(pData,1,ByteCount,fp);
ShowHexData(pData,ByteCount);
free(pData);
fclose(fp);
return 0;
not_pe_file:
printf("Not a PE file.\n");
fclose(fp);
return -1;
}
return 0;
}
Короче говоря, вы не знаете, где находятся эти данные, пока не проанализируетеданные по заголовку файла.