ai-ccrc/src/main/java/com/zoniot/ccrc/service/WechatService.java

package com.zoniot.ccrc.service;

import com.alibaba.fastjson.JSONObject;

import com.zoniot.ccrc.commom.exception.ServiceException;
import com.zoniot.ccrc.commom.utils.HttpRequest;
import lombok.extern.slf4j.Slf4j;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.util.encoders.Base64;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.math.BigInteger;
import java.security.*;
import java.security.spec.InvalidParameterSpecException;
import java.util.Arrays;
import java.util.List;

@Slf4j
@Service
public class WechatService {



    //水查查小程序

    private  static  String APP_SECRET="a01d7f75f15e1a6b7fa28a317f97ef1b";

    private  static  String APP_ID="wx27f831675081e293" ;

    public  static   String getSessionkey(String code) {
        JSONObject oppidObj=getWechatAuthInfo(code);
        Integer errcode = (Integer) oppidObj.get("errcode");
        if(errcode == null){
            String openid = (String) oppidObj.get("openid");
            String session_key = (String) oppidObj.get("session_key");
            log.info("session_key:"+session_key);
            return session_key;
        }else {
            throw new ServiceException(-900,"获取session_key错误");
        }

    }
    private static  JSONObject getWechatAuthInfo(String code){
        String url = "https://api.weixin.qq.com/sns/jscode2session?appid=" + APP_ID + "&secret="
                + APP_SECRET + "&js_code=" + code + "&grant_type=authorization_code";
        String reusult = null;
        try {
            reusult = HttpRequest.doGet(url);
            log.info(reusult);
        } catch (IOException e) {
            e.printStackTrace();
        }
        JSONObject oppidObj = JSONObject.parseObject(reusult);
        return oppidObj;
    }
    public static String getOpenid(String code,String customerId) {
        JSONObject oppidObj=getWechatAuthInfo(code);
        Integer errcode = (Integer) oppidObj.get("errcode");
        if(errcode == null){
            String openid = (String) oppidObj.get("openid");
            log.info("openid:"+openid);
            return openid;
        }else {
            throw new ServiceException(-900,"获取openid错误");
        }
        //return "ojYws5KUylI0muJdONaGaAUAJ_Xc";
    }
    public static   String getInfo(String encryptedData, String iv, String sessionKey) {
        // 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");
                log.info("info:"+result);
                return JSONObject.parseObject(result).getString("purePhoneNumber");
            }
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (InvalidParameterSpecException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (InvalidAlgorithmParameterException e) {
            e.printStackTrace();
        } catch (NoSuchProviderException e) {
            e.printStackTrace();
        }
        return null;
    }

}