- package cn.CodeSnippet.snippets.core;
- import java.io.IOException;
- import java.io.Serializable;
- import java.security.InvalidKeyException;
- import java.security.NoSuchAlgorithmException;
- import javax.crypto.BadPaddingException;
- import javax.crypto.Cipher;
- import javax.crypto.IllegalBlockSizeException;
- import javax.crypto.KeyGenerator;
- import javax.crypto.NoSuchPaddingException;
- import javax.crypto.SealedObject;
- import javax.crypto.SecretKey;
- public class EncryptDecryptObjectWithDES {
- 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 + "]";
- }
- }
- }
- //该片段来自于http://www.codesnippet.cn/detail/271120137548.html
来源: http://www.codesnippet.cn/detail/271120137548.html