【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

 

posted @ 2012-12-20 14:48  Introspector  阅读(267)  评论(0)    收藏  举报