3DES加解密过程

 1 package com.pff.pff;
 2 
 3 import java.security.SecureRandom;
 4 
 5 import javax.crypto.Cipher;
 6 import javax.crypto.KeyGenerator;
 7 import javax.crypto.SecretKey;
 8 import javax.crypto.SecretKeyFactory;
 9 import javax.crypto.spec.DESedeKeySpec;
10 
11 import org.apache.commons.codec.binary.Hex;
12 
13 public class Des3 {
14 
15     private static String test = "pff";
16     public static void main(String[] args) {
17         testDes();
18     }
19     public static void testDes() {
20         try {
21             //生成秘钥
22             KeyGenerator keyGenerator = KeyGenerator.getInstance("DESede");
23             keyGenerator.init(new SecureRandom());
24             SecretKey generateKey = keyGenerator.generateKey();
25             byte[] encoded = generateKey.getEncoded();
26             //秘钥转换
27             DESedeKeySpec desKeySpec = new DESedeKeySpec(encoded);
28             SecretKeyFactory instance = SecretKeyFactory.getInstance("DESede");
29             SecretKey generateSecret = instance.generateSecret(desKeySpec);
30             //DES加密过程
31             Cipher cipher = Cipher.getInstance("DESede/ECB/PKCS5padding");
32             cipher.init(Cipher.ENCRYPT_MODE, generateSecret);
33             byte[] result = cipher.doFinal(test.getBytes());
34             System.out.println("DESede加密过程结果= " +Hex.encodeHexString(result));
35             //解密过程
36             cipher.init(Cipher.DECRYPT_MODE, generateSecret);
37             byte[] result2 = cipher.doFinal(result);
38             System.out.println("DESede解密过程结果= "+new String(result2));
39         } catch (Exception e) {
40             e.printStackTrace();
41         }
42     }
43 
44 }