【CODE】DES加解密

 1         String keyStr = "SPARTAGO";

 2         String data = "这也是斯巴达";

 3 

 4         SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");

 5         DESKeySpec keySpec = new DESKeySpec(keyStr.getBytes());

 6         Key key = keyFactory.generateSecret(keySpec);

 7         

 8         AlgorithmParameterSpec iv = new IvParameterSpec("GOSPARTA".getBytes());

 9 

10         // 此处用“DES/CBC/PKCS5Padding”;“DES/EBC/PKCS5Padding”与“DES”是相同的statement,都无法使用向量

11         Cipher enCipher = Cipher.getInstance("DES/CBC/PKCS5Padding");

12         Cipher deCipher = Cipher.getInstance("DES/CBC/PKCS5Padding"); // 获取实例时参数需为此形式

13         

14         enCipher.init(Cipher.ENCRYPT_MODE, key, iv);

15         deCipher.init(Cipher.DECRYPT_MODE, key, iv);

16 

17         BASE64Encoder encoder = new BASE64Encoder();

18         BASE64Decoder decoder = new BASE64Decoder();

19         

20         String result = encoder.encode(enCipher.doFinal(data.getBytes()));

21         

22         System.out.println("Before:"+result);

23         

24         System.out.println("After:"+new String(deCipher.doFinal(decoder.decodeBuffer(result))));

25