微信小程序获取手机号信息 Java解密

 
		<dependency>
			<groupId>org.bouncycastle</groupId>
			<artifactId>bcprov-jdk15on</artifactId>
			<version>1.59</version>
		</dependency>

package com.hscodeweb.hscode.utils;
 
import com.alibaba.fastjson.JSONObject;
import com.sun.org.apache.xerces.internal.impl.dv.util.Base64;
import java.security.AlgorithmParameters;
import java.security.Security;
import java.util.Arrays;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
 
/**
 *
 * 解密方法
 */
public class WxDecryptUtils {
 
    public static void main(String[] args) {
        String encryptedData = "Hl5FuClGBXOVj6k+u7v9CG7qc6+bumifVHUtSeEEuIlYUQDygWnBbX2yrv/kBfogCJZrGNiMdCQfD9Wzna/DtYCXwXL72d8ES088YXZyoHfeasp6vRd8ihNdZ2sqS52G/FdSYVePuHcCFyreh//Dgsfj1jeKBqT2e6bEtv68l+mABv/wTFzeP4Cj/n9cji3gv7JD++bkMNeystBYVHlaMw==";
        String sessionKey =  "3Zv1Bf2q8VLR7dVPT1II/A==";
        String iv =  "LqxentnEHKmngq92PJ8LWw==";
        JSONObject jsonObject = WxDecryptUtils.unEncrypted(encryptedData, sessionKey, iv);
        System.out.println(jsonObject);
    }
 
    public static JSONObject unEncrypted(String encryptedData, String sessionKey, String iv){
        // 被加密的数据
        byte[] dataByte = Base64.decode(encryptedData);
        // 加密秘钥
        byte[] keyByte = Base64.decode(sessionKey);
        // 偏移量
        byte[] ivByte = Base64.decode(iv);
 
        try {
            // 如果密钥不足16位，那么就补足.  这个if 中的内容很重要
            int base = 16;
            if (keyByte.length % base != 0) {
                int groups = keyByte.length / base + (keyByte.length % base != 0 ? 1 : 0);
                byte[] temp = new byte[groups * base];
                Arrays.fill(temp, (byte) 0);
                System.arraycopy(keyByte, 0, temp, 0, keyByte.length);
                keyByte = temp;
            }
            // 初始化
            Security.addProvider(new BouncyCastleProvider());
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding","BC");
            SecretKeySpec spec = new SecretKeySpec(keyByte, "AES");
            AlgorithmParameters parameters = AlgorithmParameters.getInstance("AES");
            parameters.init(new IvParameterSpec(ivByte));
            cipher.init(Cipher.DECRYPT_MODE, spec, parameters);// 初始化
            byte[] resultByte = cipher.doFinal(dataByte);
            if (null != resultByte && resultByte.length > 0) {
                String result = new String(resultByte, "UTF-8");
                return JSONObject.parseObject(result);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
}

{"phoneNumber":"13121220880","watermark":{"appid":"wxe374e9a27da47e45","timestamp":1589386099},"purePhoneNumber":"13121220880","countryCode":"86"}