MD5 加密 解密

加密：

using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Security.Cryptography;
 using System.IO;
 
namespace ENPOT.Manufacture.Security.DL.DataLogic
 {
     public class CryptUtil
     {
         static string encryptionKey = "12345678";
         static byte[] rgbKey = new byte[0];
         static byte[] rgbIV = new byte[] { 10, 20, 30, 40, 50, 60, 70, 80 };
 
      //编码
 
        public static string Encrypt(string textToEncrypt)
         {
             rgbKey = Encoding.UTF8.GetBytes(encryptionKey.Substring(0, 8));
             DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
             byte[] bytes = Encoding.UTF8.GetBytes(textToEncrypt);
             MemoryStream stream = new MemoryStream();
             CryptoStream stream2 = new CryptoStream(stream, provider.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
             stream2.Write(bytes, 0, bytes.Length);
             stream2.FlushFinalBlock();
             return Convert.ToBase64String(stream.ToArray());
         }

解码：

public static string Decrypt(string textToDecrypt)
         {
             byte[] buffer = new byte[textToDecrypt.Length];
             rgbKey = Encoding.UTF8.GetBytes(encryptionKey.Substring(0, 8));
             DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
             buffer = Convert.FromBase64String(textToDecrypt);
             MemoryStream stream = new MemoryStream();
             CryptoStream stream2 = new CryptoStream(stream, provider.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
             stream2.Write(buffer, 0, buffer.Length);
             stream2.FlushFinalBlock();
             return Encoding.UTF8.GetString(stream.ToArray());
         }
     }
 
}