Need help from a Java-Programmer

[infratec]

Hi together,

I have a small problem:

I need the result of a small piece of java code.
I have no knowledge of java, so my tries with an online compiler failed.

Here is the codesnippet:

Code: Select all

private Static Key b()
{
  String str = "7c[@D9ùdR4i7/u&9Maxt";
  StringBuilder localStringBuilder = new StringBuilder();
  For (int i = 0; i < "4v131M17m19Q10M1555".length(); i++)
    If (!Character.isLetter("4v131M17m19Q10M1555".charAt(i)))
    {
      localStringBuilder.append(str.charAt(Integer.parseInt("4v131M17m19Q10M1555".charAt(i))));
    }
    Else
    {
      int j = Integer.parseInt("4v131M17m19Q10M1555".substring(i + 1, i + 3));
      localStringBuilder.append(str.charAt(Integer.parseInt(j)));
      i += 2;
    }
  Return new SecretKeySpec(localStringBuilder.toString().getBytes(), "RC4");
}

I reprogrammed it with PB, but I'm not sure if the values are right.
I need the 'localStringBuilder.String' and the Return value to verify my PB version.

Than you very much in advance,

Bernd

[infratec]

Here is my 'java' code:

Code: Select all

import javax.swing.*;
import java.io.*;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.NoSuchAlgorithmException;
import javax.crypto.spec.SecretKeySpec;

class Test
{
 public static void main(String args[])
 {
  String str;
  try{
   FileInputStream fstream = new FileInputStream("test.cfg");
   DataInputStream in = new DataInputStream(fstream);
   BufferedReader br = new BufferedReader(new InputStreamReader(in)); 
   str = br.readLine();
   in.close();
  }catch (Exception e){//Catch exception if any
   System.err.println("Error: " + e.getMessage());
  }
  
  StringBuilder localStringBuilder = new StringBuilder();
  for (int i = 0; i < "4v131M17m19Q10M1555".length(); i++)
   if (!Character.isLetter("4v131M17m19Q10M1555".charAt(i)))
   {
     localStringBuilder.append(str.charAt(Integer.parseInt("4v131M17m19Q10M1555".charAt(i))));
   }
   else
   {
     int j = Integer.parseInt("4v131M17m19Q10M1555".substring(i + 1, i + 3));
     localStringBuilder.append(str.charAt(Integer.parseInt(j)));
     i += 2;
   }
  System.out.println( new SecretKeySpec(localStringBuilder.toString().getBytes(), "RC4"));
 }
}

But it gives an error:

cannot find symbol
symbol : method parseInt(char)

I put the string in a file, because the java compiler don't want some of the used characters.

Oh, I tried it with JDK 1.6

Bernd

[Arctic Fox]

Hi Bernd!

With the following piece of Java code I get this result with Java 7:

Code: Select all

Ducati999
[68, 117, 99, 97, 116, 105, 57, 57, 57]

Code: Select all

import javax.crypto.spec.SecretKeySpec;
import java.security.Key;
import java.util.Arrays;

public class Main
{
    public static void main(String[] args)
    {
        System.out.println(Arrays.toString(b().getEncoded()));
    }

    private static Key b()
    {
        String str = "7c[@D9ùdR4i7/u&9Maxt";
        StringBuilder localStringBuilder = new StringBuilder();
        
        for (int i = 0; i < "4v131M17m19Q10M1555".length(); i++)
        {
            if (!Character.isLetter("4v131M17m19Q10M1555".charAt(i)))
            {
                localStringBuilder.append(str.charAt(Integer.parseInt(String.valueOf("4v131M17m19Q10M1555".charAt(i)))));
            }
            else
            {
                int j = Integer.parseInt("4v131M17m19Q10M1555".substring(i + 1, i + 3));
                localStringBuilder.append(str.charAt(Integer.parseInt(String.valueOf(j))));
                i += 2;
            }
        }

        System.out.println(localStringBuilder.toString());
        return new SecretKeySpec(localStringBuilder.toString().getBytes(), "RC4");
    }
}

[infratec]

Hi Arctic Fox,

thanks a lot

In the mean time I got somthing similar with:

Code: Select all

import javax.swing.*;
import java.io.*;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.NoSuchAlgorithmException;
import javax.crypto.spec.SecretKeySpec;

public class test
{
 public static void main(String args[])
 {
  String str = "";
  try{
   FileInputStream fstream = new FileInputStream("test.cfg");
   DataInputStream in = new DataInputStream(fstream);
   BufferedReader br = new BufferedReader(new InputStreamReader(in)); 
   str = br.readLine();
   in.close();
  }catch (Exception e){//Catch exception if any
   System.err.println("Error: " + e.getMessage());
  }
  
  System.out.println(str);
  
  String str2 = "4v131M17m19Q10M1555";
  StringBuilder localStringBuilder = new StringBuilder();
  for (int i = 0; i < str2.length(); i++)
  {
   System.out.println(i);
   if (!Character.isLetter(str2.charAt(i)))
   {
     localStringBuilder.append(str.charAt(Integer.parseInt(str2.substring(i, i + 1))));
   }
   else
   {
     int j = Integer.parseInt(str2.substring(i + 1, i + 3));
     localStringBuilder.append(str.charAt(j));
     i += 2;
   }
  }
  System.out.println(localStringBuilder.toString());  
  System.out.println( new SecretKeySpec(localStringBuilder.toString().getBytes(), "RC4"));
 }
}

Ducati999
is shown too.
Only the 'Key' is not shown.

Btw. I used the online compiler at
http://www.innovation.ch/java/java_compile.html

I hope I can now check my PB solution.

Thanks again,

Bernd