3DES加密解密算法的文章

        using System.Security.Cryptography;
        /// <summary>
        /// 3DES加密
         /// </summary>
        /// <param name="str"></param>
        /// <param name="key"></param>
        /// <returns></returns>
        public static string Encrypt3DES(string str,string key)
        {
            TripleDESCryptoServiceProvider DES = new TripleDESCryptoServiceProvider();
            DES.Key = ASCIIEncoding.ASCII.GetBytes(key);
            DES.Mode = CipherMode.ECB;

            ICryptoTransform DESEncrypt = DES.CreateEncryptor();
            byte[] Buffer = ASCIIEncoding.ASCII.GetBytes(str);
            return Convert.ToBase64String(DESEncrypt.TransformFinalBlock(Buffer, 0, Buffer.Length));
        }

        /// <summary>
        /// 3DES解密
        /// </summary>
        /// <param name="str"></param>
        /// <param name="key"></param>
        /// <returns></returns>
        public static string Decrypt3DES(string str, string key)
        {
            TripleDESCryptoServiceProvider DES = new TripleDESCryptoServiceProvider();
            DES.Key = ASCIIEncoding.ASCII.GetBytes(key);
            DES.Mode = CipherMode.ECB;
            DES.Padding = System.Security.Cryptography.PaddingMode.PKCS7;

            ICryptoTransform DESDecrypt = DES.CreateDecryptor();
            string result = "";
            try
            {
                byte[] Buffer = Convert.FromBase64String(str);
                result = ASCIIEncoding.ASCII.GetString(DESDecrypt.TransformFinalBlock(Buffer, 0, Buffer.Length));
            }
            catch (Exception e)
            {

            }
            return result;
        }