hacker.org

Code: Select all

#!/bin/bash

wget --save-cookies=cookies --keep-session-cookies "http://www.hacker.org/challenge/chal.php?id=79&name=NAME&password=PASSWORD"
wget --load-cookies=cookies http://www.hacker.org/challenge/misc/stars.php
mv stars.php stars.png
# convert picture into xpm (kind of ascii art)
convert stars.png stars.xpm

result=""
index=0
export IFS="
"
cat stars.xpm|fgrep  .|grep -v \# |while read line
do
	((index+=1))
	if [[ $index -eq 8 ]]
	then
		var=$(echo $line|cut -c9,25,41,57,73,89,105,121|sed -e "s#\.#1#g" -e "s# #0#g")
		dez=$(echo "ibase=2; $var"|bc)
		printf "%c" $dez >>tmp_result
		index=-8
	fi
done
result=$(cat tmp_result)

echo $result
wget --load-cookies=cookies "http://www.hacker.org/challenge/chal.php?id=79&answer=$result&go=Submit&name=NAME&password=PASSWORD"

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--snipp---
  try
                {
                        url = new URL( "http://www.hacker.org/challenge/misc/stars.php" );
                        con = url.openConnection();
                        con.setRequestProperty("Cookie", cookie);

                        BufferedImage img = ImageIO.read(con.getInputStream());

                        for (i=0;i<12;i++) // foreach row
                        {
                                b=0;

                                for ( j=0;j<8;j++) //for each bit
                                {
                                        x=8+(j*16);
                                        y=8+(i*16);

                                        pixel=img.getRGB(x,y);


                                        if ( pixel == -1644826)
                                        {

                                                b=b+(int)Math.pow(2,(7-j));

                                        }
                                }
                                answer=answer+(char)b;
                        }



                }
                catch (Exception e)
                {
                        System.out.println("error " + e);
                }

                System.out.println(filteredline);

                answerstring="http://www.hacker.org/challenge/chal.php?id=79&answer="+answer;
--snapp--

Code: Select all

#!/usr/bin/env python

import Image

img = Image.open("stars.png")
width, height = img.size
print "".join([chr(int("".join(["1" if 200 < min(img.getpixel((x,y))) else "0" for x in xrange(7, width, 16)]), 2)) for y in xrange(7, height, 16)])

Code: Select all

var
  cheight = 600, cwidth = 200,
  startx = -1, starty = -1,
  b = 1, cbyte = 0,
  s = '';

var canvas =
  document.createElementNS("http://www.w3.org/1999/xhtml", "html:canvas");
canvas.height = cheight;
canvas.width = cwidth;

var ctx = canvas.getContext("2d");
ctx.drawWindow(window.content, 0, 0, cwidth, cheight, "rgb(0,0,0)");
var mid = ctx.getImageData(0, 0, cwidth, cheight);

for (var y = 0; y < cheight; y++) {
  for (var x = 0; x < cwidth; x++) {
    b = (y * cwidth + x) * 4;
    if (mid.data[b] == 223 &&
        mid.data[b+1] == 145 &&
        mid.data[b+2] == 44) {
      startx = x+8;
      starty = y+8;
      break;
    } // found
  } // for columns
  if (startx > -1) break;
} // for rows

if (startx > -1) {
  for (var y = 0; y < 16; y++) {
    cbyte = 0;
    for (var x = 0; x < 8; x++) {
      b = mid.data[((starty+y*16)*cwidth+startx+x*16)*4];
      if (b == 230) {
        cbyte += (1 << (7-x));
      } else if (b < 100) {
        break;
      }
    } // for columns == bits
    if (b == 0 || cbyte == 0) break;
    s += String.fromCharCode(cbyte);
  } // for rows == bytes 
  window.content.document.getElementsByName('answer')[0].value = s;
} // if image was found

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Public Class Form1


    Private Sub Image_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Image.Click
        Dim file_name As String = Application.ExecutablePath
        file_name = "C:\Users\Craig\Desktop\Challenges\hackerorg\stars\stars.php.png"

        Dim row As Integer
        Dim col As Integer
        Dim currentColor As Color
        Dim binString As String = ""
        Dim outputString As String = ""

        ' Load the picture into a Bitmap.
        Dim bm As New Bitmap(file_name)

        ' Display the results.
        picImage.Image = bm
        PicImage.SizeMode = PictureBoxSizeMode.AutoSize

        'start at 8, add 16 for each row down
        'same from left

        For row = 8 To bm.Height - 8 Step 16
            For col = 8 To bm.Width - 8 Step 16
                currentColor = bm.GetPixel(col, row)
                If currentColor.ToArgb = -2125524 Then
                    binString = binString & 0
                Else
                    binString = binString & 1
                End If
            Next
            outputString = outputString & Chr(BinToInt(binString))
            binString = ""
        Next

        Outbox.Text = outputString
    End Sub

    Function BinToInt(ByVal BinaryNumber As String)

        Dim Length As Integer
        Dim TempValue As Integer
        'Get the length of the binary string
        Length = Len(BinaryNumber)

        'Convert each binary digit to its corresponding integer value
        'and add the value to the previous sum
        'The string is parsed from the right (LSB - Least Significant Bit)
        'to the left (MSB - Most Significant Bit)
        For x = 1 To Length
            TempValue = TempValue + Val(Mid(BinaryNumber, Length - x + 1, 1)) * 2 ^ (x - 1)
        Next

        BinToInt = TempValue

    End Function

End Class

Code: Select all

sleep(2000)
Dim $x
Dim $y
$x=65
$y=385
$var=PixelGetColor ( $x , $y )
While $var<>1579032
$var2=0
$var=PixelGetColor ( $x , $y )
if $var=15132390 then
$var2=$var2+16
endif
$var=PixelGetColor ( $x+15  , $y)
if $var=15132390 then
$var2=$var2+8
endif
$var=PixelGetColor ( $x+30  , $y)
if $var=15132390 then
$var2=$var2+4
endif
$var=PixelGetColor ( $x+45  , $y)
if $var=15132390 then
$var2=$var2+2
endif
$var=PixelGetColor ( $x+60 , $y )
if $var=15132390 then
$var2=$var2+1
endif
if $var2==0 then
send("{Enter}")
else
$key=Chr(96+$var2)
send($key)
endif
$y=$y+16
wend

Code: Select all

img = new Image();
img.src = 'misc/stars.php';

canvasEl = document.createElement('canvas');
canvasEl.width = '128';
canvasEl.height = img.height;

document.body.appendChild(canvasEl)
canvas = canvasEl.getContext('2d');

canvas.drawImage(img,0,0);

num_ch = Math.floor(img.height / 16);
ans = '';
for(h=0;h<num_ch;h++)
{
    n_ch = 0;
    for(w=0;w<8;w++)
    {
        imgData = canvas.getImageData((8+16*w),(8+16*h),1,1);
        
        bit = (imgData.data[2] == 230) ? 1 : 0;
        n_ch+= Math.pow(2,(7-w))*bit;
    }
    ch = String.fromCharCode(n_ch);
    ans+= ch;
}
document.forms[1].elements[0].value = ans;
document.forms[1].submit();

Code: Select all

<?php
	$im = imagecreatefrompng('http://www.hacker.org/challenge/misc/stars.php');
	$sol = "";
	for($i = 0; $i < 10; $i++)
	{
		$string = "";
		for($j = 0; $j < 8; $j++)
		{
			$string =$string.((imagecolorat($im, $j*16 + 8 , $i*16 + 8) == 14651692)?"0":"1");
		}
		$sol .= chr(bindec($string));
	}
	echo $sol;
?>

Code: Select all

HotKeySet("{DEL}", "quit")

$sx = 1297
$sy = 520

$row = 0
$bullet = 0

$xstep = 16
$ystep = 16

$code = ""
$string = ""

While 1
	Sleep(10)
	
	if $bullet == 8 Then
		$row += 1
		$bullet = 0
		
		$string = $string & Chr($code)
		$code = 0
	EndIf
	
	Mousemove(1297 + ($bullet * $xstep), 520 + ($row * $ystep), 0)
	$color = PixelGetColor($sx + ($bullet * $xstep), $sy + ($row * $ystep))
	
	if $color == 0xE6E6E6 Then
		$bit = 1
	ElseIf $color == 0xDF912C Then
		$bit = 0
	Else 
		$bit = "x"
		Mousemove($sx + ($bullet * $xstep), $sy + ($row * $ystep), 0)
		ToolTip($string, $sx + (7 * $xstep) + 70, $sy + (($row-1) * $ystep))
		Sleep(20000)
		Exit
	EndIf
	
	$code += $bit * 2 ^ (7 - $bullet)
	ToolTip($string, $sx + (7 * $xstep) + 70)
	$bullet += 1
WEnd


Func quit()
	Exit
EndFunc