Re: LARRY ELLISON

[Craig Sanders <cas@taz.net.au>]

On Wed, 12 Mar 1997, Hamish Moffatt wrote:

> Okay, but how about this one. I'm on hamishpc.rising.com.au, accessing
> a web page (http://www.silcom.com/~tonkin/pointless/), but I'm IP
> masquerading via silly.rising.com.au, which isn't really called that
> at all because I'm on via my ISP who's given my a dynamic IP, so I'm
> really dialin-a1-30.melbourne.internex.net.au or similar, and then
> I've via proxy cache proxy1.mel.connect.com.au, but that page still
> knows I'm from hamishpc!
>
> I do CGI but can't see how they do this one.

view the document source - they're using a java applet:

<APPLET CODEBASE="classes" CODE="urname2.class" WIDTH=400 HEIGHT=30>
<PARAM NAME="background_color" VALUE=255,255,255>
<PARAM NAME="text_color" VALUE=0,0,0>
<PARAM NAME="font_name" VALUE="times roman">
<PARAM NAME="font_size" VALUE=20>
<H4><FONT COLOR=RED>If you're reading this you need to get a JAVA-capable
browser!!</FONT></H4>
</APPLET>

so, urname2.class is run by your netscape and it displays your hostname.

I'd like to see the source of that applet - i'd like to know what else
it does...e.g. does it log my hostname & login id (email address) at the
remote site?

i just did a search for urname2.class at alta-vista and came up with:

    http://www.appl-math.tu-muenchen.de/~gwoersch/java.html

which has a lot of java demos and source code, including urname2.java.

here it is. it looks innocuous enough but it could quite easily be
modified to send information back to the server.



// Used to get the user name. special crdits to Scott Clark at
// the Central Java Message Base for the tech part and Mig9 for
// the motivation part. Amit C. (ConnectSoft Ruksun, Pune, India)
// amit@corus.com Updated by public demand. Lots of people wanted a
// version, where the font, etc can be changed

import java.applet.Applet;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.lang.String;
import java.util.StringTokenizer;
import java.net.InetAddress;
import java.net.UnknownHostException;

public class urname2 extends Applet
{
  Color clrTextColor = new Color (255, 255, 255);
  Color clrBackGndColor = new Color (160, 160, 100);
  String sFontName;		// Text font, max = 72 ?

  int iFontSize;

  InetAddress myAddress = null;

  public void init ()
  {
    // Get the specified color for text, else 
    // use black
    clrTextColor = StringToColor (
				   MygetStringParam ("text_color", null),
				   Color.black);
    // Get the specified color for background,
    // else use red
    clrBackGndColor = StringToColor (
				MygetStringParam ("background_color", null),
				      Color.red);

    // Font name
    sFontName = new String (MygetStringParam ("font_name", "Courier"));
    // Font size
    iFontSize = MygetintParam ("font_size", 14);
    // Now set the font specified
    setFont (new Font (sFontName, Font.PLAIN, iFontSize));

    try
    {
      myAddress = InetAddress.getLocalHost ();
    }
    catch (UnknownHostException e)
    {
    }
  }
  public void paint (Graphics g)
  {
    g.setColor (clrBackGndColor);
    g.drawRect (0, 0, size ().width - 1, size ().height - 1);
    g.fillRect (0, 0, size ().width - 1, size ().height - 1);

    g.setColor (clrTextColor);

    g.drawString ("Welcome " + myAddress.getHostName () + "!", 10, 20);
//              g.drawString(myAddress.toString(), 10, 20);    
  }


  public String getAppletInfo ()
  {
    return "urname2,  a Java Applet by Amit Chaudhary \n(amit@corus.com), 3/7/96";
  }

  public String[][] getParameterInfo ()
  {
    String pinfo[][] =
    {
      {"background_color", "0-255,0-255,0-255", "Background Color"},
      {"text_color", "0-255,0-255,0-255", "Text Color"},
      {"font_name", "String", "Font for the text, TimesRoman, Courier, helvetica, .."},
      {"font_size", "8-72", "The font size"}};

      return pinfo;
  }

  // A changed version of getparam
  public String MygetStringParam (String att, String def)
  {
    String ret;

      try
    {
      ret = getParameter (att);
      if (ret.length () < 1)
	return def;
      else
	return ret;
    }
    catch (Exception e)
    {
      return def;
    }
  }

  // A another changed version of getparam, this to get int params
  public int MygetintParam (String att, int def)
  {
    Integer RetParam;

      try
    {
      RetParam = new Integer (getParameter (att));
      if (RetParam.intValue () == 0)
	return def;
      else
	return RetParam.intValue ();
    }
    catch (Exception e)
    {
      return def;
    }
  }

  // Given a string parses it to get the colors  
  public Color StringToColor (String strColor_p, Color clrDefault_p)
  {
    if (strColor_p.length () == 0)
      {
	return clrDefault_p;
      }

    int r;
    int g;
    int b;
    // Delimiter is ','
    StringTokenizer st = new StringTokenizer (strColor_p, ",");

    try
    {
      r = Integer.valueOf (st.nextToken ()).intValue ();
      g = Integer.valueOf (st.nextToken ()).intValue ();
      b = Integer.valueOf (st.nextToken ()).intValue ();
      return new Color (r, g, b);
    }
    catch (Exception e)
    {
      return clrDefault_p;
    }
  }

}

craig