小程序获取用户手机号服务器端代码（C＃）

最新推荐文章于 2025-07-01 20:00:47 发布

caiyang101

最新推荐文章于 2025-07-01 20:00:47 发布

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本文介绍了一种使用C#处理微信小程序加密数据的方法，通过调用微信API获取session_key，并利用AES-128-CBC模式解密用户数据。文章详细展示了从接收加密数据到返回解密结果的全过程。

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<% @ webhandler language="C#" class="AverageHandler" %>
using System;
using System.Net;
using System.Web;
using System.Collections.Generic;
using System.Text;
using System.Security.Cryptography;
using System.IO;
using LitJson;

public class AverageHandler : IHttpHandler
{
public bool IsReusable
{ get { return true; } }

public void ProcessRequest(HttpContext ctx)
{
    ctx.Response.ContentType = "application/json";
    HttpRequest Request = ctx.Request;
    string text = Request["encryptedData"];
    string IV = Request["iv"];

    //小程序appid和appsecret配置
    string appid = "小小星星亮晶晶";
    string secret = "小小星星亮晶晶";

    string code = Request["code"];//微信获取登录的口令
    Stream s_re = WebRequest.Create("https://api.weixin.qq.com/sns/jscode2session?appid="+appid+"&secret="+secret+"&js_code="+code+"&grant_type=authorization_code").GetResponse().GetResponseStream();
    StreamReader sr = new StreamReader(s_re, Encoding.UTF8);
    string strLine = sr.ReadToEnd();
    sr.Close();
    try
    {
        JsonData jo = JsonMapper.ToObject(strLine);
        string Key = jo["session_key"].ToString();
        //string weixinID = jo["openid"].ToString();
        string str= AES_decrypt(text,Key,IV);
        ctx.Response.Write(str);
     }
        catch (Exception ex)
     {
         //return "";

     }

}

public string AES_decrypt(string encryptedDataStr, string key, string iv)
        {
            RijndaelManaged rijalg = new RijndaelManaged();
            //-----------------
            //设置 cipher 格式 AES-128-CBC

            rijalg.KeySize = 128;

            rijalg.Padding = PaddingMode.PKCS7;
            rijalg.Mode = CipherMode.CBC;

            rijalg.Key = Convert.FromBase64String(key);
            rijalg.IV = Convert.FromBase64String(iv);

            byte[] encryptedData= Convert.FromBase64String(encryptedDataStr);
            //解密
            ICryptoTransform decryptor = rijalg.CreateDecryptor(rijalg.Key, rijalg.IV);

            string result;

            using (MemoryStream msDecrypt = new MemoryStream(encryptedData))
            {
                using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
                {
                    using (StreamReader srDecrypt = new StreamReader(csDecrypt))
                    {

                        result = srDecrypt.ReadToEnd();
                    }
                }
            }

            return result;
        }

}