How to Store des key in keystore

Question

I'm writing a program to writing a symmetric key (DES key) to keystore.
see the program below:
public class KeyStoreTest {
public static void main(String[] args) {  
try {
String keyStorePass = "password";
String keyStorePath="c:\\newKeyStoreName";
KeyStore ks = KeyStore.getInstance("JCEKS","SunJCE");//we need to use JCEKS because we need to write sysmetric key into key into keystore
ks.load(null,keyStorePass.toCharArray());//null because i'm creating a new keytsore
//save my secret key
KeyGenerator keyGen = KeyGenerator.getInstance("DES");
SecretKey key =keyGen.generateKey();
ks.setKeyEntry("peter",key.getEncoded(),null);//here we put an alias peter with the generation key into the keytore.no problem here
//then i try to check whether peter is exist.it return true which mean peter exist in the keystore.
//the main point is to get key back.
//when i use the getKey method it req a password.
//wht password should i use.
ks.getKey("peter",keyStorePass.toCharArray());//when i try this want.I got an error. and when i put the password equal to null i still got an error
FileOutputStream fos = new FileOutputStream(keyStorePath);
ks.store(fos, keyStorePass.toCharArray());//this lini just to store the keystore that i created.
fos.close();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
please help me.i hav done this for the whole week.i hav search the web and still did't get an answer.sorry coz my english is bad.Thanx to all.

Answer 1

As mensioned in the message you can read, the JCE provider implementations can be used when they are first authenticated. This is done through checking their class signature,saved in the jar file, on special instantiatings. So you can not extract the classes and use them in a directory; even rejar them will not help you unless you have got a certificate from sun to sign the jar file. Use the original jar file.
For further litrreature on the JCEAuthentication you can read http://java.sun.com/products/jce/doc/guide/HowToImplAProvider.html#JCEAuth