[Wargame.kr]-md5 password write-up

value , true

<?php
 if (isset($_GET['view-source'])) {
  show_source(__FILE__);
  exit();
 }
 
 if(isset($_POST['ps'])){
  sleep(1);
  mysql_connect("localhost","md5_password","md5_password_pz");
  mysql_select_db("md5_password");
  mysql_query("set names utf8");
  /*
  
  create table admin_password(
   password char(64) unique
  );
  
  */
 
  include "../lib.php"; // include for auth_code function.
  $key=auth_code("md5 password");
  $ps = mysql_real_escape_string($_POST['ps']);
  $row=@mysql_fetch_array(mysql_query("select * from admin_password where password='".md5($ps,true)."'"));
  if(isset($row[0])){
   echo "hello admin!"."<br />";
   echo "Password : ".$key;
  }else{
   echo "wrong..";
  }
 }
?>
 
<style>
 input[type=text] {width:200px;}
</style>
<br />
<br />
<form method="post" action="./index.php">
password : <input type="text" name="ps" /><input type="submit" value="login" />
</form>
<div><a href='?view-source'>get source</a></div>

사실 이문제는 풀이가 없어도 될만한 문제긴하지만,
문제로 돌아가면,

바이너리에 해쉬값을 받겠다는 말인데, 여기서 hash를 받게 되면 quote가 나오게 된다!

a=0 > true