Save into a file a SecretKey

Question

Hi,
I'm using JCE module of java and I don't know exactly how I can save a SecretKey into a file:
KeyGenerator kg = KeyGenerator.getInstance("DES");
SecretKey secretKey = kg.generateKey();But then how can I save "secretKey" into a file?
Thanks for all answers.
-- Gandalf

Answer 1

The key itself is serializable
File f = new File("path/to/your/file/yourfile");
          //serialize the initial vector if was just created
          try {
               FileOutputStream fo = new FileOutputStream(f);
               ObjectOutputStream so = new ObjectOutputStream(fo);
               so.writeObject(new String(secretKey));
               so.flush();
                        so.close();
          catch (IOException e) {
               System.out.println("Serialization IOException: " + e.getMessage());
               e.printStackTrace();
          catch (Exception e) {
               System.out.println("Serialization Exception: " + e.getMessage());
               e.printStackTrace();