// open.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <io.h>
#include <stdio.h>
#include <conio.h>
unsigned char kkk[8];
unsigned char buffer[600],ch_buffer[600];
unsigned byteswritten;
unsigned char read_buff[8];
unsigned char read_char;

int main(int argc, char* argv[])
{
   int fh1, fh2;
   unsigned int i,j=0;
   unsigned int nbytes = 600, bytesread;
   for(i=0;i<8;i++)
   {
	   read_buff[i] = '\0';
   }

   for(i=0;i<8;i++)
   {
	  read_char = _getch();
	  if( read_char == '\r')
		   break;
	 read_buff[i]=read_char;
   }

	kkk[0] =0x12^read_buff[0];//
	kkk[1] =0x25^read_buff[1];
	kkk[2] =0x7d^read_buff[2];
	kkk[3] =0xde^read_buff[3];
	kkk[4] =0x3e^read_buff[4];
	kkk[5] =0xb2^read_buff[5];
	kkk[6] =0xc4^read_buff[6];
	kkk[7] =0x93^read_buff[7];

   fh1 = _open( "22.rao", _O_RDONLY|_O_BINARY );
   if( fh1 == -1 )
   {
      perror( "open failed on input file" );
	  return(-1);
	}
   fh2 = _open( "22.rar", _O_RDWR | _O_CREAT|_O_TRUNC|_O_BINARY );//, _S_IREAD| _S_IWRITE
   if( fh2 == -1 )
   {
      perror( "Open failed on output file" );
  	  return(-1);
   }
	
   while(1)
   {
		bytesread = _read(fh1,buffer,nbytes);
		if(bytesread == -1)
		{
		  perror( "read failed on output file" );
  		  return(-1);
		}

		for(i= 0 ; i < bytesread ; i++)//轉換
		{
			ch_buffer[i] = buffer[i]^kkk[j];
			j++;
			if(j==8)
				j = 0 ;
		}
		if(bytesread !=0)
		{
			byteswritten  = _write(fh2,&ch_buffer[0],bytesread);
			if(byteswritten==-1)
			{
			  perror( "write failed on output file" );
  			  return(-1);
			}

		}

		if(bytesread < nbytes)
			break;
   }

    _close( fh1 );
    _close( fh2 );
	return 0;
}