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 }
