作者：手机用户2602935245 | 来源：互联网 | 2023-09-05 14:23
获取用户头像、昵称、手机号等授权信息，需解密java微信小程序加密数据解密算法1**2*加密数据解密3*4*@paramencryptedData5*@paramsessionKe
获取用户头像、昵称、手机号等授权信息，需解密
java 微信小程序加密数据解密算法
1 /**
2 * 加密数据解密
3 *
4 * @param encryptedData
5 * @param sessionKey
6 * @param iv
7 * @return
8 */
9 private String decrypt(String encryptedData, String sessionKey, String iv) {
10 String result = "";
11 try {
12 byte[] resultByte = AES.decrypt(Base64.decodeBase64(encryptedData),
13 Base64.decodeBase64(sessionKey),
14 Base64.decodeBase64(iv));
15 if (null != resultByte && resultByte.length > 0) {
16 result = new String(resultByte, "UTF-8");
17 }
18 } catch (Exception e) {
19 e.printStackTrace();
20 }
21 return result;
22 }
AES 解密工具类
1 import org.bouncycastle.jce.provider.BouncyCastleProvider;
2
3 import javax.crypto.BadPaddingException;
4 import javax.crypto.Cipher;
5 import javax.crypto.IllegalBlockSizeException;
6 import javax.crypto.NoSuchPaddingException;
7 import javax.crypto.spec.IvParameterSpec;
8 import javax.crypto.spec.SecretKeySpec;
9 import java.security.*;
10
11 public class AES {
12 public static boolean initialized = false;
13
14 /**
15 * AES解密
16 *
17 * @param content
18 * 密文
19 * @return
20 * @throws InvalidAlgorithmParameterException
21 * @throws NoSuchProviderException
22 */
23 public static byte[] decrypt(byte[] content, byte[] keyByte, byte[] ivByte) throws InvalidAlgorithmParameterException {
24 initialize();
25 try {
26 Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");
27 Key sKeySpec = new SecretKeySpec(keyByte, "AES");
28 cipher.init(Cipher.DECRYPT_MODE, sKeySpec, generateIv(ivByte));// 初始化
29 byte[] result = cipher.doFinal(content);
30 return result;
31 } catch (NoSuchAlgorithmException e) {
32 e.printStackTrace();
33 } catch (NoSuchPaddingException e) {
34 e.printStackTrace();
35 } catch (InvalidKeyException e) {
36 e.printStackTrace();
37 } catch (IllegalBlockSizeException e) {
38 e.printStackTrace();
39 } catch (BadPaddingException e) {
40 e.printStackTrace();
41 } catch (NoSuchProviderException e) {
42 // TODO Auto-generated catch block
43 e.printStackTrace();
44 } catch (Exception e) {
45 // TODO Auto-generated catch block
46 e.printStackTrace();
47 }
48 return null;
49 }
50
51 public static void initialize() {
52 if (initialized) {
53 return;
54 }
55 Security.addProvider(new BouncyCastleProvider());
56 initialized = true;
57 }
58
59 // 生成iv
60 public static AlgorithmParameters generateIv(byte[] iv) throws Exception {
61 AlgorithmParameters params = AlgorithmParameters.getInstance("AES");
62 params.init(new IvParameterSpec(iv));
63 return params;
64 }
65 }
View Code以下情况，有可能导致解密失效：
1、短时间的多次 wx.login
2、授权回调里，又再次 wx.login
也就是，没事不要瞎调用 wx.login
微信小程序加密数据解密算法 java
原文：https://www.cnblogs.com/qiujz/p/13207580.html
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