1 package com.more;
2
3
4 import java.security.NoSuchAlgorithmException;
5 import java.security.SecureRandom;
6 import javax.crypto.Cipher;
7 import javax.crypto.KeyGenerator;
8 import javax.crypto.SecretKey;
9 import javax.crypto.spec.SecretKeySpec;
10 import org.apache.commons.codec.binary.Base64;
11
12 public class AESUtil
13 {
14 public static String encrypt(String content, String password)
15 {
16 try
17 {
18 Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding"
);
19
20 byte[] byteContent = content.getBytes("utf-8"
);
21 SecretKeySpec secreKeySpec =
getSecretKey(password);
22 cipher.init(1
, secreKeySpec);
23
24 byte[] result =
cipher.doFinal(byteContent);
25
26 return Base64.encodeBase64String(result);
27 }
28 catch (Exception ex)
29 {
30 ex.printStackTrace();
31 }
32 return null;
33 }
34
35 public static String decrypt(String content, String password)
36 {
37 try
38 {
39 Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding"
);
40
41
42 cipher.init(2
, getSecretKey(password));
43
44
45 byte[] result =
cipher.doFinal(Base64.decodeBase64(content));
46
47 return new String(result, "utf-8"
);
48 }
49 catch (Exception ex)
50 {
51 ex.printStackTrace();
52 }
53 return null;
54 }
55
56 private static SecretKeySpec getSecretKey(String password)
57 {
58 KeyGenerator kg =
null;
59 try
60 {
61 kg = KeyGenerator.getInstance("AES"
);
62
63 SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG"
);
64 secureRandom.setSeed(password.getBytes());
65
66 kg.init(128
, secureRandom);
67
68
69 SecretKey secretKey =
kg.generateKey();
70
71 return new SecretKeySpec(secretKey.getEncoded(), "AES"
);
72 }
73 catch (NoSuchAlgorithmException ex)
74 {
75 ex.printStackTrace();
76 }
77 return null;
78 }
79 }
AESUtils
在linux系统下抛出异常：javax.crypto.BadPaddingException: Given final block not properly padded。
在工具类中增加调用了 setSeed 方法。
原因分析SecureRandom 实现完全随操作系统本身的內部状态，除非调用方在调用 getInstance 方法之后又调用了 setSeed 方法；该实现在 windows 上每次生成的 key 都相同，但是在 solaris 或部分 linux 系统上则不同。
文章解决方式来源于：https://m.jb51.net/article/40941.htm
转载于:https://www.cnblogs.com/zhangjiangbin/p/11354418.html
相关资源：JAVA上百实例源码以及开源项目
