添加项目文件。

CoreCms.Net.WeChat.Service/Utilities/CheckSignature.cs

@@ -0,0 +1,68 @@
+/***********************************************************************
+ *            Project: CoreCms
+ *        ProjectName: 核心内容管理系统                                
+ *                Web: https://www.corecms.net                      
+ *             Author: 大灰灰                                          
+ *              Email: jianweie@163.com                                
+ *         CreateTime: 2021/7/29 21:44:44
+ *        Description: 暂无
+ ***********************************************************************/
+
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Security.Cryptography;
+using System.Text;
+using System.Threading.Tasks;
+using CoreCms.Net.WeChat.Service.Models;
+
+namespace CoreCms.Net.WeChat.Service.Utilities
+{
+    /// <summary>签名验证类</summary>
+    public class CheckSignature
+    {
+        /// <summary>在网站没有提供Token（或传入为null）的情况下的默认Token，建议在网站中进行配置。</summary>
+        public const string Token = "weixin";
+
+        /// <summary>检查签名是否正确</summary>
+        /// <param name="signature"></param>
+        /// <param name="postModel">需要提供：Timestamp、Nonce、Token</param>
+        /// <returns></returns>
+        public static bool Check(string signature, PostModel postModel) => CheckSignature.Check(signature, postModel.Timestamp, postModel.Nonce, postModel.Token);
+
+        /// <summary>检查签名是否正确</summary>
+        /// <param name="signature"></param>
+        /// <param name="timestamp"></param>
+        /// <param name="nonce"></param>
+        /// <param name="token"></param>
+        /// <returns></returns>
+        public static bool Check(string signature, string timestamp, string nonce, string token = null) => signature == CheckSignature.GetSignature(timestamp, nonce, token);
+
+        /// <summary>返回正确的签名</summary>
+        /// <param name="postModel">需要提供：Timestamp、Nonce、Token</param>
+        /// <returns></returns>
+        public static string GetSignature(PostModel postModel) => CheckSignature.GetSignature(postModel.Timestamp, postModel.Nonce, postModel.Token);
+
+        /// <summary>返回正确的签名</summary>
+        /// <param name="timestamp"></param>
+        /// <param name="nonce"></param>
+        /// <param name="token"></param>
+        /// <returns></returns>
+        public static string GetSignature(string timestamp, string nonce, string token = null)
+        {
+            token = token ?? "weixin";
+            string s = string.Join("", ((IEnumerable<string>)new string[3]
+            {
+        token,
+        timestamp,
+        nonce
+            }).OrderBy<string, string>((Func<string, string>)(z => z)).ToArray<string>());
+            byte[] hash = SHA1.Create().ComputeHash(Encoding.UTF8.GetBytes(s));
+            StringBuilder stringBuilder = new StringBuilder();
+            foreach (byte num in hash)
+                stringBuilder.AppendFormat("{0:x2}", (object)num);
+            return stringBuilder.ToString();
+        }
+    }
+}