using System;
using System.Diagnostics;
using System.Security.Cryptography;
using System.Text;
using System.IO;
using System.Web;

namespace Press
{
    public class CryptoUtil
    {
        
        public static byte[] KEY_64 = { 42, 16, 93, 56, 78, 4, 218, 223 };
        public static byte[] IV_64 = { 55, 103, 46, 79, 36, 89, 167, 3 };

        private static byte[] KEY_192 = { 42, 16, 93, 156, 78, 4, 218, 32, 15, 167, 44, 80, 26, 250, 155, 112, 2, 94, 11, 204, 119, 35, 184, 197 };
        private static byte[] IV_192 = { 55, 103, 246, 79, 36, 99, 167, 3, 42, 5, 62, 83, 184, 7, 209, 13, 145, 23, 200, 58, 173, 10, 121, 222 };

        //标准的DES加密
        public static string Encrypt(string value1)
        {
            if (value1 != "")
            {
                
                DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
                MemoryStream ms = new MemoryStream();
                CryptoStream cs = new CryptoStream(ms, cryptoProvider.CreateEncryptor(KEY_64, IV_64), CryptoStreamMode.Write);
                StreamWriter sw = new StreamWriter(cs);
                sw.Write(value1);
                sw.Flush();
                cs.FlushFinalBlock();
                ms.Flush();
                return Convert.ToBase64String(ms.GetBuffer(), 0, (int)ms.Length);
            }
            return "";
        }

        //标准的DES解密
        public static string Decrypt(string value1)
        {
            if (value1 != "")
            {
                DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
                byte[] buffer = Convert.FromBase64String(value1);
                MemoryStream ms = new MemoryStream(buffer);
                CryptoStream cs = new CryptoStream(ms, cryptoProvider.CreateDecryptor(KEY_64, IV_64), CryptoStreamMode.Read);
                StreamReader sr = new StreamReader(cs);
                return sr.ReadToEnd();
            }
            return "";
        }
    }

    public class CookieUtil
    {
        public const string COOKIENULL = null;

        public static void SetEncryptedCookie(string key, string val)
        {
            key = CryptoUtil.Encrypt(key);
            val = CryptoUtil.Encrypt(val);
            SetCookie(key, val);
        }
        public static void SetEncryptedCookie(string key, string val, DateTime expires)
        {
            key = CryptoUtil.Encrypt(key);
            val = CryptoUtil.Encrypt(val);
            SetCookie(key, val, expires);
        }
        public static void SetEncryptedCookie(string key, string val, int DayNum)
        {
            key = CryptoUtil.Encrypt(key);
            val = CryptoUtil.Encrypt(val);
            DateTime expires = DateTime.Now.AddDays(DayNum);
            SetCookie(key, val, expires);
        }
        #region///SetCookie
        private static void SetCookie(string key, string val)
        {
            key = HttpContext.Current.Server.UrlEncode(key);
            val = HttpContext.Current.Server.UrlEncode(val);
            HttpCookie cookie = new HttpCookie(key, val);
            SetCookie(cookie);
        }
        private static void SetCookie(string key, string val, DateTime expires)
        {