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api_v1/Appointment.Entity/Utility/CryptoHelper.cs

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+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Security.Cryptography;
+using System.Text;
+
+namespace Appointment.Entity
+{
+    public static class CryptoHelper
+    {
+        private static byte[] DESKeys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
+
+        /// <summary>
+        /// MD5小写加密
+        /// </summary>
+        /// <param name="token">加密前字符串</param>
+        /// <returns></returns>
+        /// <remarks>
+        /// 使用了UTF8格式
+        /// </remarks>
+        public static string Md5(string token)
+        {
+            StringBuilder strHash = new StringBuilder();
+            System.Security.Cryptography.MD5CryptoServiceProvider md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
+            byte[] bytHash;
+
+            bytHash = md5.ComputeHash(Encoding.UTF8.GetBytes(token));
+            md5.Clear();
+            for (int i = 0; i < bytHash.Length; i++)
+            {
+                strHash.Append(bytHash[i].ToString("x").PadLeft(2, '0'));
+            }
+            return strHash.ToString();
+        }
+
+        /// <summary>
+        /// MD5大写加密
+        /// </summary>
+        /// <param name="input"></param>
+        /// <returns></returns>
+        /// <remarks>
+        /// 字符串转为ASCII再加密 
+        /// 与前面方法Md5()的区别是汉字加密后的结构不一致，
+        /// </remarks>
+        public static string Md5Hash(string input)
+        {
+            string strResult;
+            using (var md51 = System.Security.Cryptography.MD5.Create())
+            {
+                var result = md51.ComputeHash(Encoding.ASCII.GetBytes(input));
+                strResult = BitConverter.ToString(result);
+                strResult = strResult.Replace("-", "");
+            }
+            return strResult;
+        }
+
+        /// <summary>
+        /// DES加密字符串
+        /// </summary>
+        /// <param name="encryptString">待加密的字符串</param>
+        /// <param name="encryptKey">加密密钥,要求为8位</param>
+        /// <returns>加密成功返回加密后的字符串,失败返回源串</returns>
+        public static string DES_Encode(string encryptString, string encryptKey = "dlhisapi")
+        {
+            encryptKey = encryptKey.Substring(0, 8);
+            encryptKey = encryptKey.PadRight(8, ' ');
+            byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
+            byte[] rgbIV = DESKeys;
+            byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
+            DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
+            MemoryStream mStream = new MemoryStream();
+            CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
+            cStream.Write(inputByteArray, 0, inputByteArray.Length);
+            cStream.FlushFinalBlock();
+            return Convert.ToBase64String(mStream.ToArray());
+        }
+
+        /// <summary>
+        /// DES解密字符串
+        /// </summary>
+        /// <param name="decryptString">待解密的字符串</param>
+        /// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>
+        /// <returns>解密成功返回解密后的字符串,失败返源串</returns>
+        public static string DES_Decode(string decryptString, string decryptKey = "dlhisapi")
+        {
+            try
+            {
+                decryptKey = decryptKey.Substring(0, 8);
+                decryptKey = decryptKey.PadRight(8, ' ');
+                byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);
+                byte[] rgbIV = DESKeys;
+                byte[] inputByteArray = Convert.FromBase64String(decryptString);
+                DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
+
+                MemoryStream mStream = new MemoryStream();
+                CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
+                cStream.Write(inputByteArray, 0, inputByteArray.Length);
+                cStream.FlushFinalBlock();
+                return Encoding.UTF8.GetString(mStream.ToArray());
+            }
+            catch
+            {
+                return "";
+            }
+        }
+    }
+
+
+}