java encrypt and decrypt object
private static Cipher ecipher;
private static Cipher dcipher;
private static SecretKey key;
public static void main(String[] args) {
try {
// generate secret key using DES algorithm
key = KeyGenerator.getInstance("DES").generateKey();
ecipher = Cipher.getInstance("DES");
dcipher = Cipher.getInstance("DES");
// initialize the ciphers with the given key
ecipher.init(Cipher.ENCRYPT_MODE, key);
dcipher.init(Cipher.DECRYPT_MODE, key);
// create a sealed object
SealedObject sealed = new SealedObject(new SecretObject("My secret message"), ecipher);
// get the algorithm with the object has been sealed
String algorithm = sealed.getAlgorithm();
System.out.println("Algorithm " + algorithm);
// unseal (decrypt) the object
SecretObject o = (SecretObject) sealed.getObject(dcipher);
System.out.println("Original Object: " + o);
}
catch (NoSuchAlgorithmException e) {
System.out.println("No Such Algorithm:" + e.getMessage());
return;
}
catch (NoSuchPaddingException e) {
System.out.println("No Such Padding:" + e.getMessage());
return;
}
catch (BadPaddingException e) {
System.out.println("Bad Padding:" + e.getMessage());
return;
}
catch (InvalidKeyException e) {
System.out.println("Invalid Key:" + e.getMessage());
return;
}
catch (IllegalBlockSizeException e) {
System.out.println("Illegal Block:" + e.getMessage());
return;
}
catch (ClassNotFoundException e) {
System.out.println("Class Not Found:" + e.getMessage());
return;
}
catch (IOException e) {
System.out.println("I/O Error:" + e.getMessage());
return;
}
}
public static class SecretObject implements Serializable {
private static final long serialVersionUID = -1335351770906357695L;
private final String message;
public SecretObject(String message) {
this.message = message;
}
@Override
public String toString() {
return "SecretObject [message=" + message + "]";
}
}