java 后台解密小程序前端传过来的信息,解密手机号
阅读原文时间:2023年07月10日阅读:2

package com.llny.controller;

import com.google.gson.Gson;
import com.google.gson.JsonObject;
import com.llny.utils.AesCbcUtil;
import com.llny.utils.DataResponse;
import com.llny.utils.HttpRequest;
import org.springframework.web.bind.annotation.*;

import java.util.HashMap;
import java.util.Map;

@RestController
@RequestMapping(value = "/wechat")
public class WeChaConnView {
/**
* 解密用户敏感数据
*
* @param encryptedData 明文,加密数据
* @param iv 加密算法的初始向量
* @param code 用户允许登录后,回调内容会带上 code(有效期五分钟),开发者需要将 code 发送到开发者服务器后台,使用code 换取 session_key api,将 code 换成 openid 和 session_key
* @return
*/
@ResponseBody
@PostMapping(value = "/decodeUser")
public DataResponse decodeUser(@RequestParam("encryptedData")String encryptedData, @RequestParam("iv")String iv, @RequestParam("code")String code) {
DataResponse response = new DataResponse();
Map map = new HashMap<>();

    //登录凭证不能为空  
    if (code == null || code.length() == 0) {  
        /\*map.put("status", 0);  
        map.put("msg", "code 不能为空");

        return map;\*/  
        response.setResult\_code("failed");  
        response.setResult\_msg("code 不能为空");

        return response;  
    }

    //小程序唯一标识  (在微信小程序管理后台获取)  
    String wxspAppid = "appid";  
    //小程序的 app secret (在微信小程序管理后台获取)  
    String wxspSecret = "appsecret";  
    //授权(必填)  
    String grant\_type = "authorization\_code";

    //////////////// 1、向微信服务器 使用登录凭证 code 获取 session\_key 和 openid ////////////////  
    //请求参数  
    String params = "appid=" + wxspAppid + "&secret=" + wxspSecret + "&js\_code=" + code + "&grant\_type=" + grant\_type;  
    //发送请求  
    String sr = HttpRequest.sendGet("https://api.weixin.qq.com/sns/jscode2session", params);  
    //解析相应内容(转换成json对象)  
    Gson gson = new Gson();  
    JsonObject json = gson.fromJson(sr, JsonObject.class);  
    System.out.println(json);  

// JSONObject json = JSONObject.fromObject(sr);

    if (json.get("session\_key") == null) {  
        /\*map.put("status", 0);  
        map.put("msg", "解密失败");

        return map;\*/  
        response.setResult\_code("failed");  
        response.setResult\_msg("解密失败:" + json.get("errmsg").toString().replaceAll("\\"", ""));

        return response;  
    }  
    //获取会话密钥(session\_key)  
    String session\_key = json.get("session\_key").toString();  
    //用户的唯一标识(openid)  

// String openid = (String) json.get("openid");
String openid = json.get("openid").toString();

    //////////////// 2、对encryptedData加密数据进行AES解密 ////////////////  
    String data = encryptedData.replaceAll("\[+\]", "%2B");  
    try {  
        String result = AesCbcUtil.decrypt(data, session\_key, iv, "UTF-8");  
        if (null != result && result.length() > 0) {  
            /\*map.put("status", 1);  
            map.put("msg", "解密成功"); \*/

            JsonObject userInfoJSON = gson.fromJson(result, JsonObject.class);  

// JSONObject userInfoJSON = JSONObject.fromObject(result);
System.out.println("user: " + userInfoJSON);
Map userInfo = new HashMap<>();
userInfo.put("openId", openid.replaceAll("\"", ""));
userInfo.put("phoneNumber", userInfoJSON.get("phoneNumber").toString().replaceAll("\"", ""));
userInfo.put("purePhoneNumber", userInfoJSON.get("purePhoneNumber").toString().replaceAll("\"", ""));
userInfo.put("countryCode", userInfoJSON.get("countryCode").toString().replaceAll("\"", ""));
map.put("userInfo", userInfo);
System.out.println("map: " + map);

            response.setResult\_code("success");  
            response.setResult\_msg("解密成功");  
            response.setData(userInfo);

            return response;  
        }  
    } catch (Exception e) {  
        e.printStackTrace();  
    }  
    /\*map.put("status", 0);  
    map.put("msg", "解密失败");

    return map;\*/  
    response.setResult\_code("failed");  
    response.setResult\_msg("解密失败");

    return response;  
}

}

package com.llny.utils;

import org.apache.commons.codec.binary.Base64;
import org.bouncycastle.jce.provider.BouncyCastleProvider;

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.UnsupportedEncodingException;
import java.security.*;
import java.security.spec.InvalidParameterSpecException;

/**
* Created by lsh
* AES-128-CBC 加密方式
* 注:
* AES-128-CBC可以自己定义“密钥”和“偏移量“。
* AES-128是jdk自动生成的“密钥”。
*/
public class AesCbcUtil {
static {
//BouncyCastle是一个开源的加解密解决方案,主页在http://www.bouncycastle.org/
Security.addProvider(new BouncyCastleProvider());
}
/**
* AES解密
*
* @param data //密文,被加密的数据
* @param key //秘钥
* @param iv //偏移量
* @param encodingFormat //解密后的结果需要进行的编码
* @return
* @throws Exception
*/
public static String decrypt(String data, String key, String iv, String encodingFormat) throws Exception {
// initialize();

    //被加密的数据  
    byte\[\] dataByte = Base64.decodeBase64(data);  
    //加密秘钥  
    byte\[\] keyByte = Base64.decodeBase64(key);  
    //偏移量  
    byte\[\] ivByte = Base64.decodeBase64(iv);

    try {  
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");

        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, encodingFormat);  
            return result;  
        }  
        return null;  
    } catch (NoSuchAlgorithmException e) {  
        e.printStackTrace();  
    } catch (NoSuchPaddingException e) {  
        e.printStackTrace();  
    } catch (InvalidParameterSpecException e) {  
        e.printStackTrace();  
    } catch (InvalidKeyException e) {  
        e.printStackTrace();  
    } catch (InvalidAlgorithmParameterException e) {  
        e.printStackTrace();  
    } catch (IllegalBlockSizeException e) {  
        e.printStackTrace();  
    } catch (BadPaddingException e) {  
        e.printStackTrace();  
    } catch (UnsupportedEncodingException e) {  
        e.printStackTrace();  
    }

    return null;  
}  

}

package com.llny.utils;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;

public class HttpRequest {
/**
* 向指定URL发送GET方法的请求
*
* @param url
* 发送请求的URL
* @param param
* 请求参数,请求参数应该是 name1=value1&name2=value2 的形式。
* @return URL 所代表远程资源的响应结果
*/
public static String sendGet(String url, String param) {
String result = "";
BufferedReader in = null;
try {
String urlNameString = url + "?" + param;
URL realUrl = new URL(urlNameString);
// 打开和URL之间的连接
URLConnection connection = realUrl.openConnection();
// 设置通用的请求属性
connection.setRequestProperty("accept", "*/*");
connection.setRequestProperty("connection", "Keep-Alive");
connection.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 建立实际的连接
connection.connect();
// 获取所有响应头字段
Map> map = connection.getHeaderFields();
// 遍历所有的响应头字段
for (String key : map.keySet()) {
System.out.println(key + "--->" + map.get(key));
}
// 定义 BufferedReader输入流来读取URL的响应
in = new BufferedReader(new InputStreamReader(
connection.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println("发送GET请求出现异常!" + e);
e.printStackTrace();
}
// 使用finally块来关闭输入流
finally {
try {
if (in != null) {
in.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
}
return result;
}

/\*\*  
 \* 向指定 URL 发送POST方法的请求  
 \*  
 \* @param url  
 \*      发送请求的 URL  
 \* @param param  
 \*      请求参数,请求参数应该是 name1=value1&name2=value2 的形式。  
 \* @return 所代表远程资源的响应结果  
 \*/  
public static String sendPost(String url, String param) {  
    PrintWriter out = null;  
    BufferedReader in = null;  
    String result = "";  
    try {  
        URL realUrl = new URL(url);  
        // 打开和URL之间的连接  
        URLConnection conn = realUrl.openConnection();  
        // 设置通用的请求属性  
        conn.setRequestProperty("accept", "\*/\*");  
        conn.setRequestProperty("connection", "Keep-Alive");  
        conn.setRequestProperty("user-agent",  
                "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");  
        // 发送POST请求必须设置如下两行  
        conn.setDoOutput(true);  
        conn.setDoInput(true);  
        // 获取URLConnection对象对应的输出流  
        out = new PrintWriter(conn.getOutputStream());  
        // 发送请求参数  
        out.print(param);  
        // flush输出流的缓冲  
        out.flush();  
        // 定义BufferedReader输入流来读取URL的响应  
        in = new BufferedReader(  
                new InputStreamReader(conn.getInputStream()));  
        String line;  
        while ((line = in.readLine()) != null) {  
            result += line;  
        }  
    } catch (Exception e) {  
        System.out.println("发送 POST 请求出现异常!"+e);  
        e.printStackTrace();  
    }  
    //使用finally块来关闭输出流、输入流  
    finally{  
        try{  
            if(out!=null){  
                out.close();  
            }  
            if(in!=null){  
                in.close();  
            }  
        }  
        catch(IOException ex){  
            ex.printStackTrace();  
        }  
    }  
    return result;  
}

}

package com.llny.utils;

import com.github.pagehelper.PageInfo;

public class DataResponse {

//信息详情  
private String result\_msg;

//成功失败信息  
private String result\_code;

//公共通知编码  
private String result\_num;

private PageInfo page;  
private Object data;

public DataResponse(){}

public DataResponse(Object data){  
    this.data = data;  
}

public DataResponse(String result\_code,String result\_msg){  
    this.result\_code = result\_code;  
    this.result\_msg  = result\_msg;  
}

public DataResponse(String result\_code,String result\_msg,String result\_num){  
    this.result\_code = result\_code;  
    this.result\_msg  = result\_msg;  
    this.result\_num = result\_num;  
}

public String getResult\_num() {  
    return result\_num;  
}

public void setResult\_num(String result\_num) {  
    this.result\_num = result\_num;  
}

public String getResult\_msg() {  
    return result\_msg;  
}

public void setResult\_msg(String result\_msg) {  
    this.result\_msg = result\_msg;  
}

public String getResult\_code() {  
    return result\_code;  
}

public void setResult\_code(String result\_code) {  
    this.result\_code = result\_code;  
}

public Object getData() {  
    return data;  
}

public void setData(Object data) {

    this.data = data;  
}

public PageInfo getPage() {  
    return page;  
}

public void setPage(PageInfo page) {  
    this.page = page;  
}  

}

注意:小程序传encryptedData到服务器时,encryptedData中的加号在传输到服务器时都变成了空格,导致解码失败。解决方法是传encryptedData时,把“+”用“%2B”替换。或者在服务器替换空格为加号!!!!!!

参考一位仁兄,成功,仅作记录