3DES加密算法

using System;
using System.Collections.Generic;
using System.Text;
using System.Security.Cryptography;
using System.IO;

namespace Hospital
{
    class ClsBase64
    {
        /// <summary>

        public string Key
        {
            get
            {
                return "rWC1VhkuzvxsFNTorWC1Vhkk";
            }
        }
        private System.Text.Encoding encoding;
        public System.Text.Encoding Encoding
        {
            get
            {
                if (encoding == null)
                {
                    encoding = System.Text.Encoding.UTF8;
                }
                return encoding;
            }

            set
            {
                encoding = value;
            }
        }
        /// <summary>
        /// 3DES加密
        /// </summary>
        /// <param name="strString"></param>
        /// <returns></returns>
        public string Encrypt3DES(string strString)
        {
            TripleDESCryptoServiceProvider DES = new TripleDESCryptoServiceProvider();
            DES.KeySize = 192;
            DES.Key = Encoding.GetBytes(this.Key);
            DES.Mode = CipherMode.ECB;
            DES.Padding = PaddingMode.PKCS7;
            ICryptoTransform DESEncrypt = DES.CreateEncryptor();
            byte[] Buffer = encoding.GetBytes(strString);
            return Convert.ToBase64String(DESEncrypt.TransformFinalBlock(Buffer, 0, Buffer.Length)).Replace('\n', ' ').Replace('\r', ' ');
        }
        /// <summary>
        /// 3DES解密
        /// </summary>
        /// <param name="strString"></param>
        /// <returns></returns>
        public string Decrypt3DES(string strString)
        {
            TripleDESCryptoServiceProvider DES = new TripleDESCryptoServiceProvider();
            DES.KeySize = 192;
            DES.Key = Encoding.UTF8.GetBytes(this.Key);
            DES.Mode = CipherMode.ECB;
            DES.Padding = PaddingMode.PKCS7;
            ICryptoTransform DESDecrypt = DES.CreateDecryptor();
            byte[] Buffer = Convert.FromBase64String(strString);
            return UTF8Encoding.UTF8.GetString(DESDecrypt.TransformFinalBlock(Buffer, 0, Buffer.Length));
        }
    }
}