/*
 * KeyHandler.java
 *
 * Created on den 29 december 2004, 15:52
 */

import javax.crypto.*;
import javax.crypto.spec.*;
import java.security.*;
import java.io.*;

/**
 *
 * @author Henrik Johansson
 */
public class KeyHandler {
    private String keyName = null;
    private String algorithm = "Blowfish";
    private int strength = 448;
    
    /** Creates a new instance of KeyHandler */
    public KeyHandler() {
    }
    
    public void setKeyName(String keyName) {
        this.keyName = keyName;
    }
    
    public String getKeyName() {
        return keyName;
    }
    
    public void createKey() {
        try {
            KeyGenerator kg = KeyGenerator.getInstance(algorithm);
            kg.init(strength);
            SecretKey sk = kg.generateKey();
            FileOutputStream fos = new FileOutputStream(keyName);
            ObjectOutputStream oos = new ObjectOutputStream(fos);
            oos.writeObject(sk);
        } catch(NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch(FileNotFoundException e) {
            e.printStackTrace();
        } catch(IOException e) {
            e.printStackTrace();
        }
    }
    
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        if(args.length != 1) {
            System.err.println("KeyHandler måste anropas med ett argument, namnet på den nya nyckeln.");
            System.exit(1);
        }
        KeyHandler kh = new KeyHandler();
        kh.setKeyName(args[0]);
        kh.createKey();
    }
    
}