c#加密類使用方法樣本

c#加密類使用方法樣本

using System;using System.IO;using System.Text;using System.Security.Cryptography;using System.Web;namespace Encryption.App_Code{    /// <summary>    /// 加密碼類    /// </summary>    public class Encryption    {        /// <summary>        /// 加密        /// </summary>        /// <param name="inputString"></param>        /// <returns></returns>        public static string DesEncrypt(string inputString)        {            return DesEncrypt(inputString, Key);        }        /// <summary>        /// 解密        /// </summary>        /// <param name="inputString"></param>        /// <returns></returns>        public static string DesDecrypt(string inputString)        {            return DesDecrypt(inputString, Key);        }        /// <summary>        /// 密匙        /// </summary>        private static string Key        {            get            {                return "hongye10";            }        }        /// <summary>        /// 加密字串        /// 注意:密鑰必須為８位        /// </summary>        /// <param name="strText">字串</param>        /// <param name="encryptKey">密鑰</param>        /// <param name="encryptKey">返回加密後的字串</param>        public static string DesEncrypt(string inputString, string encryptKey)        {            byte[] byKey = null;            byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };            try            {                byKey = System.Text.Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));                DESCryptoServiceProvider des = new DESCryptoServiceProvider();                byte[] inputByteArray = Encoding.UTF8.GetBytes(inputString);                MemoryStream ms = new MemoryStream();                CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(byKey, IV), CryptoStreamMode.Write);                cs.Write(inputByteArray, 0, inputByteArray.Length);                cs.FlushFinalBlock();                return Convert.ToBase64String(ms.ToArray());            }            catch (System.Exception error)            {                //return error.Message;                return null;            }        }        /// <summary>        /// 解密字串        /// </summary>        /// <param name="this.inputString">加了密的字串</param>        /// <param name="decryptKey">密鑰</param>        /// <param name="decryptKey">返回解密後的字串</param>        public static string DesDecrypt(string inputString, string decryptKey)        {            byte[] byKey = null;            byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };            byte[] inputByteArray = new Byte[inputString.Length];            try            {                byKey = System.Text.Encoding.UTF8.GetBytes(decryptKey.Substring(0, 8));                DESCryptoServiceProvider des = new DESCryptoServiceProvider();                inputByteArray = Convert.FromBase64String(inputString);                MemoryStream ms = new MemoryStream();                CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(byKey, IV), CryptoStreamMode.Write);                cs.Write(inputByteArray, 0, inputByteArray.Length);                cs.FlushFinalBlock();                System.Text.Encoding encoding = new System.Text.UTF8Encoding();                return encoding.GetString(ms.ToArray());            }            catch (System.Exception error)            {                //return error.Message;                return null;            }        }    }}

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