Java-AES256加密Util

 1 public class AES256Util {
 2
 3     /**
 4      * 密钥, 256位32个字节
 5      */
 6     public static final String DEFAULT_SECRET_KEY = "uBdUx82vPHkDKb284d7NkjFoNcKWBuka";
 7
 8     private static final String AES = "AES";
 9
10     /**
11      * 初始向量IV, 初始向量IV的长度规定为128位16个字节, 初始向量的来源为随机生成.
12      */
13     private static final byte[] KEY_VI = "c558Gq0YQK2QUlMc".getBytes();
14
15     /**
16      * 加密解密算法/加密模式/填充方式
17      */
18     private static final String CIPHER_ALGORITHM = "AES/CBC/PKCS5Padding";
19
20     private static java.util.Base64.Encoder base64Encoder = java.util.Base64.getEncoder();
21     private static java.util.Base64.Decoder base64Decoder = java.util.Base64.getDecoder();
22
23     static {
24         java.security.Security.setProperty("crypto.policy", "unlimited");
25     }
26
27     /**
28      * AES加密
29      */
30     public static String encode(String key, String content) {
31         try {
32             javax.crypto.SecretKey secretKey = new javax.crypto.spec.SecretKeySpec(key.getBytes(), AES);
33             javax.crypto.Cipher cipher = javax.crypto.Cipher.getInstance(CIPHER_ALGORITHM);
34             cipher.init(javax.crypto.Cipher.ENCRYPT_MODE, secretKey, new javax.crypto.spec.IvParameterSpec(KEY_VI));
35
36             // 获取加密内容的字节数组(这里要设置为utf-8)不然内容中如果有中文和英文混合中文就会解密为乱码
37             byte[] byteEncode = content.getBytes(java.nio.charset.StandardCharsets.UTF_8);
38
39             // 根据密码器的初始化方式加密
40             byte[] byteAES = cipher.doFinal(byteEncode);
41
42             // 将加密后的数据转换为字符串
43             return base64Encoder.encodeToString(byteAES);
44         } catch (Exception e) {
45             e.printStackTrace();
46         }
47         return null;
48     }
49
50     /**
51      * AES解密
52      */
53     public static String decode(String key, String content) {
54         try {
55             javax.crypto.SecretKey secretKey = new javax.crypto.spec.SecretKeySpec(key.getBytes(), AES);
56             javax.crypto.Cipher cipher = javax.crypto.Cipher.getInstance(CIPHER_ALGORITHM);
57             cipher.init(javax.crypto.Cipher.DECRYPT_MODE, secretKey, new javax.crypto.spec.IvParameterSpec(KEY_VI));
58
59             // 将加密并编码后的内容解码成字节数组
60             byte[] byteContent = base64Decoder.decode(content);
61             // 解密
62             byte[] byteDecode = cipher.doFinal(byteContent);
63             return new String(byteDecode, java.nio.charset.StandardCharsets.UTF_8);
64         } catch (Exception e) {
65             e.printStackTrace();
66         }
67         return null;
68     }
69
70     public static void main(String[] args) {
71         String dbPassword = "123456";
72         String encryptDbPwd = AES256Util.encode(DEFAULT_SECRET_KEY, dbPassword);
73         System.out.println("encrypt: " + encryptDbPwd);
74
75         String decrypt = AES256Util.decode(DEFAULT_SECRET_KEY, encryptDbPwd);
76         System.out.println("decrypt:" + decrypt);
77     }
78
79 }