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08.昶东/EastChanger/SignUtil.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Security.Cryptography;
+using System.Text;
+
+namespace EastChanger
+{
+    public static class SignUtil
+    {
+        /// <summary>
+        /// sign生成
+        /// </summary>
+        /// <param name="paramsMap"></param>
+        /// <param name="secret"></param>
+        /// <returns></returns>
+        public static string BuildSign(Dictionary<string, object> paramsMap, string secret)
+        {
+            //var keySet = paramsMap.Keys;
+            List<string> paramNames = paramsMap.Keys.ToList();
+            paramNames.Sort();
+            StringBuilder paramNameValue = new StringBuilder();
+            foreach (var paramName in paramNames)
+            {
+                paramNameValue.Append(paramName).Append(paramsMap[paramName]);
+            }
+            string source = secret + paramNameValue.ToString() + secret;
+            return ToMD5(source);
+        }
+
+        /// <summary>
+        /// MD加密
+        /// </summary>
+        /// <param name="message"></param>
+        /// <returns></returns>
+        public static string ToMD5(string message)
+        {
+            try
+            {
+                // 1 创建一个提供信息摘要算法的对象，初始化为md5算法对象
+                MD5 md5 = new MD5CryptoServiceProvider();
+                // 2 将消息变成byte数组
+                byte[] input = Encoding.UTF8.GetBytes(message);
+                // 3 计算后获得字节数组,这就是那128位了
+                byte[] buff = md5.ComputeHash(input);
+                // 4 把数组每一字节（一个字节占八位）换成16进制连成md5字符串
+                return Byte2hex(buff);
+            }
+            catch (Exception e)
+            {
+                throw e;
+            }
+        }
+
+        private static string Byte2hex(byte[] bytes)
+        {
+            //创建一个StringBuilder对象来存储最终的结果
+            StringBuilder sign = new StringBuilder();
+            //使用for循环遍历字节数组中的每个字节
+            for (int i = 0; i < bytes.Length; i++)
+            {
+                // 将字节强制转换为整数，并对其进行位运算，即保留后八位的值，并转换为十六进制形式的字符串
+                string hex = bytes[i].ToString("x2");
+                // 如果转换后的字符串长度为1，即只有1位，则在前面添加一个0，以保证每个字节都是两位十六进制数
+                if (hex.Length == 1)
+                {
+                    sign.Append("0");
+                }
+                // 将转换后的字符串追加到StringBuilder对象中，并转换为大写形式
+                sign.Append(hex.ToUpper());
+            }
+            return sign.ToString();
+        }
+
+        public static string UrlEncode(string str)
+        {
+            StringBuilder sb = new StringBuilder();
+            byte[] byStr = System.Text.Encoding.UTF8.GetBytes(str); //默认是System.Text.Encoding.Default.GetBytes(str)
+            for (int i = 0; i < byStr.Length; i++)
+            {
+                sb.Append(@"%" + Convert.ToString(byStr[i], 16));
+            }
+
+            return (sb.ToString());
+        }
+    }
+}