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NEW to Crytography

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Post new topic   Reply to topic   Printer-friendly version    Networking/Security Forums Index -> Cryptographic Software and Hardware

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becool
Just Arrived
Just Arrived


Joined: 20 Nov 2010
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PostPosted: Sat Nov 20, 2010 5:13 pm    Post subject: NEW to Crytography Reply with quote

I WOULD LIKE TO DECRYPT the INFORMATION BELOW USING THIS JAVA CODE. PLEASE COULD someone SHOW ME THE STEP I NEED TO TAKE. IAM NEW TO PROGRAMMING.

Code:

public class Encoder1

{

   public static void main(String[] args)

   {

      if (args.length != 3)

      {

         System.out.println("USAGE: java Encoder1 plaintextfile encryptedfile key\n");

       System.out.println(" Where plaintextfile is the file you wish to encrypt");

       System.out.println(" and the encrypted version is placed in encryptedfile.");

         System.out.println(" key takes a value in the range (0-255).");

         return;

      }



      try

      {

        File file = new File(args[0]);

        if (!file.exists() || !file.isFile())

            {

              System.out.println("File doesn\'t exist");

              return;

            }



         FileInputStream plainin = new FileInputStream(file);

         FileOutputStream encryptedout = new FileOutputStream(args[1]);



       byte key = (byte)(Byte.parseByte(args[2]));

       // Should check key is in the right range

       int c;



       while((c = plainin.read()) >= 0)

         {

          // The following line is the encryption algorithm

            byte ec = (byte) (c^key);

            encryptedout.write(ec);

         }



         plainin.close();

         encryptedout.close();

      }

      catch (Exception exception)

      {

         exception.printStackTrace();

      }

   }

}



Code: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Moderator note: edited to fix code tags - capi
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