分享一个C#下的加密解密的算法

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Security.Cryptography;using System.IO;namespace AEStest{    class Program    {        /// AES加密        /// </summary>        /// <param name="EncryptString">待加密密文</param>        /// <param name="EncryptKey">加密密钥</param>        /// <returns></returns>        public static string AESEncrypt(string EncryptString, string EncryptKey)        {            if (string.IsNullOrEmpty(EncryptString)) { throw (new Exception("密文不得为空")); }            if (string.IsNullOrEmpty(EncryptKey)) { throw (new Exception("密钥不得为空")); }            string m_strEncrypt = "";            byte[] m_btIV = Convert.FromBase64String("Rkb4jvUy/ye7Cd7k89QQgQ++");            Rijndael m_AESProvider = Rijndael.Create();            try            {                byte[] m_btEncryptString = Encoding.Default.GetBytes(EncryptString);                MemoryStream m_stream = new MemoryStream();                CryptoStream m_csstream = new CryptoStream(m_stream, m_AESProvider.CreateEncryptor(Encoding.Default.GetBytes(EncryptKey), m_btIV), CryptoStreamMode.Write);                m_csstream.Write(m_btEncryptString, 0, m_btEncryptString.Length);                m_csstream.FlushFinalBlock();                m_strEncrypt = Convert.ToBase64String(m_stream.ToArray());                m_stream.Close(); m_stream.Dispose();                m_csstream.Close(); m_csstream.Dispose();            }            catch (IOException ex) { throw ex; }            catch (CryptographicException ex) { throw ex; }            catch (ArgumentException ex) { throw ex; }            catch (Exception ex) { throw ex; }            finally { m_AESProvider.Clear(); }            return m_strEncrypt;        }        /// <summary>        /// AES 解密        /// </summary>        /// <param name="DecryptString">待解密密文</param>        /// <param name="DecryptKey">解密密钥</param>        /// <returns></returns>        public static string AESDecrypt(string DecryptString, string DecryptKey)        {            if (string.IsNullOrEmpty(DecryptString)) { throw (new Exception("密文不得为空")); }            if (string.IsNullOrEmpty(DecryptKey)) { throw (new Exception("密钥不得为空")); }            string m_strDecrypt = "";            byte[] m_btIV = Convert.FromBase64String("Rkb4jvUy/ye7Cd7k89QQgQ++");            Rijndael m_AESProvider = Rijndael.Create();            try            {                byte[] m_btDecryptString = Convert.FromBase64String(DecryptString);                MemoryStream m_stream = new MemoryStream();                CryptoStream m_csstream = new CryptoStream(m_stream, m_AESProvider.CreateDecryptor(Encoding.Default.GetBytes(DecryptKey), m_btIV), CryptoStreamMode.Write);                m_csstream.Write(m_btDecryptString, 0, m_btDecryptString.Length);                m_csstream.FlushFinalBlock();                m_strDecrypt = Encoding.Default.GetString(m_stream.ToArray());                m_stream.Close(); m_stream.Dispose();                m_csstream.Close(); m_csstream.Dispose();            }            catch (IOException ex) { throw ex; }            catch (CryptographicException ex) { throw ex; }            catch (ArgumentException ex) { throw ex; }            catch (Exception ex) { throw ex; }            finally { m_AESProvider.Clear(); }            return m_strDecrypt;        }        static void Main(string[] args)        {            Console.WriteLine("请输入需要加密的字符串：");            string str = Console.ReadLine();            string str1 = AESEncrypt(str,"123456");            Console.WriteLine("加密后的字符串为：");            Console.WriteLine(str1);            Console.WriteLine("下面为解密后的字符串：");            string str2=AESDecrypt(str1,"123456");            Console.WriteLine(str2);            Console.ReadKey();        }    }}