#include "stdafx.h"
#include<windows.h> void Decrypt4k(TCHAR *str)
{
HANDLE hFile = CreateFile(str, GENERIC_READ|GENERIC_WRITE , 0, NULL,OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); if (hFile==NULL||hFile==INVALID_HANDLE_VALUE)
{
OutputDebugString(_T("release_con_file CreateFile Error"));
return ;
} DWORD filesize=4096; char* buffer=new char[4096];
DWORD readsize;
ReadFile(hFile,buffer,filesize,&readsize,NULL); for(int i=0;i<4096;i++)
{
buffer[i]=buffer[i]-1;
printf("%d\r\n",buffer[i]);
} SetFilePointer(hFile, 0, NULL, FILE_BEGIN); DWORD dw_size;
WriteFile(hFile,buffer,filesize,&dw_size,0); delete[] buffer; // 注意是delete[] 而不是 delete
CloseHandle(hFile); // 关闭句柄。 } void Encryption4k(TCHAR* str)
{
HANDLE hFile = CreateFile(str, GENERIC_READ|GENERIC_WRITE , 0, NULL,OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); if (hFile==NULL||hFile==INVALID_HANDLE_VALUE)
{
OutputDebugString(_T("release_con_file CreateFile Error"));
return ;
} DWORD filesize=4096; char* buffer=new char[4096];
DWORD readsize;
ReadFile(hFile,buffer,filesize,&readsize,NULL); for(int i=0;i<4096;i++)
{
buffer[i]=buffer[i]+1;
printf("%d\r\n",buffer[i]);
} SetFilePointer(hFile, 0, NULL, FILE_BEGIN); DWORD dw_size;
WriteFile(hFile,buffer,filesize,&dw_size,0); delete[] buffer; // 注意是delete[] 而不是 delete
CloseHandle(hFile); // 关闭句柄。 } int _tmain(int argc, _TCHAR* argv[])
{
Encryption4k(_T("c:\\Test.exe")); return 0;
}