#include <stdio.h>

#include <fcntl.h>

#define PW_LEN 10

#define XORKEY 1

void xor(char* s, int len){

    int i;

    for(i=; i<len; i++){

        s[i] ^= XORKEY;

    }

}

int main(int argc, char* argv[]){

    int fd;

    if(fd=open("/home/mistake/password",O_RDONLY,) < ){

        printf("can't open password %d\n", fd);

        return ;

    }

    printf("do not bruteforce...\n");

    sleep(time()%);

    char pw_buf[PW_LEN+];

    int len;

    if(!(len=read(fd,pw_buf,PW_LEN) > )){

        printf("read error\n");

        close(fd);

        return ;

    }

    char pw_buf2[PW_LEN+];

    printf("input password : ");

    scanf("%10s", pw_buf2);

    // xor your input

    xor(pw_buf2, );

    if(!strncmp(pw_buf, pw_buf2, PW_LEN)){

        printf("Password OK\n");

        system("/bin/cat flag\n");

    }

    else{

        printf("Wrong Password\n");

    }

    close(fd);

    return ;

}

if(fd=open("/home/mistake/password",O_RDONLY,) < )

  if(!(len=read(fd,pw_buf,PW_LEN) > )){

        printf("read error\n");

        close(fd);

        return ;