自己的服务解密 获取微信小程序用户的手机号码

1、小程序传参数js_code（用户获取session_key）和encryptedData、vi（用于解密手机号）

发送http请求调接口：

https://api./sns/jscode2session?appid=固定的appid&secret=固定的secret&js_code=每次小程序传参&grant_type=authorization_code

返回数据如下，取出session_key用于解密：

{"session_key":"EKjnfpQ6LFxScbtOg==","expires_in":7200,"openid":"oBEMf0UbSQ6xpgUcI"}

2、拿session_key和encryptedData、vi解密手机号

import mons.codec.binary.Base64;import javax.crypto.Cipher;import javax.crypto.spec.IvParameterSpec;import javax.crypto.spec.SecretKeySpec;import java.security.spec.AlgorithmParameterSpec;/*** Created by hgg on /2/24.* 小程序AES解密*/public class AESDecodeUtils {public static void main(String[] args) throws Exception {byte[] encrypData = Base64.decodeBase64("mgxuts7uEbdnBclp0Qim0TS3MGoaSyE09MqTvbeG9Z1PjxsDwjVH0FxG1Q==");byte[] ivData = Base64.decodeBase64("SG386etdA3sOXHxqfnw==");byte[] sessionKey = Base64.decodeBase64("Fn6r4IOiZJBXn4hQ0w==");System.out.println(decrypt(sessionKey,ivData,encrypData));}public static String decrypt(byte[] key, byte[] iv, byte[] encData) throws Exception {AlgorithmParameterSpec ivSpec = new IvParameterSpec(iv);Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");SecretKeySpec keySpec = new SecretKeySpec(key, "AES");cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);//解析解密后的字符串return new String(cipher.doFinal(encData),"UTF-8");}}

encryptedData 解密后为以下 json 结构，详见加密数据解密算法

{"phoneNumber": "13580006666", "purePhoneNumber": "13580006666", "countryCode": "86","watermark":{"appid":"APPID","timestamp":TIMESTAMP}}

借鉴文章，感谢！