cookie操作类(加密,获取,删除)

using System; using System.IO; using System.Text; using System.Diagnostics; using System.Web.Security; using System.Security; using System.Security.Cryptography; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; namespace ASPNET3DBBook {  public class EncryptString  {   ///定义64位和192位的Kev和IV   private static byte[] Key64 = {42, 16, 93, 156, 78, 4, 218, 32};   private static byte[] IV64  = {55, 103, 246, 79, 36, 99, 167, 3};   private static byte[] Key192 = {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[] IV192  = {55, 103, 246, 79, 36, 99, 167, 3,42, 5, 62, 83, 184, 7, 209, 13,145, 23, 200, 58, 173, 10, 121, 222};   /// <summary>   /// 加密字符串   /// </summary>   /// <param name="valueString"></param>   /// <returns></returns>   public static String Encrypt(String valueString)   {    if(valueString != "")    {   ///创建加密的provider     DESCryptoServiceProvider desprovider = new DESCryptoServiceProvider();     ///创建加密的流     MemoryStream memoryStream = new MemoryStream();         CryptoStream cryptoStream = new CryptoStream(memoryStream,desprovider.CreateEncryptor                                (Key64,IV64),CryptoStreamMode.Write);     StreamWriter writerStream = new StreamWriter(cryptoStream);     ///加密给定的字符串     writerStream.Write(valueString);     writerStream.Flush();     cryptoStream.FlushFinalBlock();     ///返回加密后的字符串     memoryStream.Flush();     return(Convert.ToBase64String(memoryStream.GetBuffer(),0,(int)memoryStream.Length));    }    return(null);   }   /// <summary>   /// 解密字符串   /// </summary>   /// <param name="valueString"></param>   /// <returns></returns>   public static String Decrypt(String valueString)   {    if(valueString != "")    {   ///创建解密的provider     DESCryptoServiceProvider desprovider = new DESCryptoServiceProvider();     byte[] buffer = Convert.FromBase64String(valueString);     MemoryStream memoryStream = new MemoryStream();     ///解密给定的字符串     CryptoStream cryptoStream = new CryptoStream(memoryStream,desprovider.CreateEncryptor                                 (Key64,IV64),CryptoStreamMode.Read);     StreamReader readerStream = new StreamReader(cryptoStream);     return(readerStream.ReadToEnd());    }    return(null);   }   /// <summary>   /// DES加密方法   /// </summary>   /// <param name="valueString"></param>   /// <returns></returns>   public static String EncryptTripleDES(String valueString)   {    if(valueString != "")    {       ///创建加密的provider     TripleDESCryptoServiceProvider triprovider = new TripleDESCryptoServiceProvider();     ///创建加密的流     MemoryStream memoryStream = new MemoryStream();     CryptoStream cryptoStream = new CryptoStream(memoryStream,triprovider.CreateEncryptor                                (Key192,IV192),CryptoStreamMode.Write);     StreamWriter writerStream = new StreamWriter(cryptoStream);     ///加密给定的字符串     writerStream.Write(valueString);     writerStream.Flush();     cryptoStream.FlushFinalBlock();     ///返回加密后的字符串     memoryStream.Flush();     return(Convert.ToBase64String(memoryStream.GetBuffer(),0,(int)memoryStream.Length));    }    return(null);   }   /// <summary>   /// DES解密方法   /// </summary>   /// <param name="valueString"></param>   /// <returns></returns>   public static String DecryptTripleDES(String valueString)   {    if(valueString != "")    {   ///创建加密的provider     TripleDESCryptoServiceProvider triprovider = new TripleDESCryptoServiceProvider();     ///创建加密的流     byte[] buffer = Convert.FromBase64String(valueString);     MemoryStream memoryStream = new MemoryStream();     CryptoStream cryptoStream = new CryptoStream(memoryStream,triprovider.CreateEncryptor                                 (Key192,IV192),CryptoStreamMode.Read);     StreamReader readerStream = new StreamReader(cryptoStream);     return(readerStream.ReadToEnd());    }    return(null);   }  }  public class CookieEncrypt  {     /// <summary>   /// 设置Cookie   /// </summary>   /// <param name="cookie"></param>   public static void SetCookie(HttpCookie cookie)   {    HttpContext.Current.Response.Cookies.Set(cookie);   }   /// <summary>   /// 设置Cookie   /// </summary>   /// <param name="key"></param>   /// <param name="valueString"></param>   public static void SetCookie(String key,String valueString)   {   ///获取关键字和值    key = HttpContext.Current.Server.UrlEncode(key);    valueString = HttpContext.Current.Server.UrlEncode(valueString);    ///设置Cookie    HttpCookie cookie = new HttpCookie(key,valueString);    SetCookie(cookie);   }   /// <summary>   /// 设置Cookie   /// </summary>   /// <param name="key"></param>   /// <param name="valueString"></param>   /// <param name="expires"></param>   public static void SetCookie(String key,String valueString,DateTime expires)   {   ///获取关键字和值    key = HttpContext.Current.Server.UrlEncode(key);    valueString = HttpContext.Current.Server.UrlEncode(valueString);    ///设置Cookie    HttpCookie cookie = new HttpCookie(key,valueString);    cookie.Expires = expires;    SetCookie(cookie);   }   /// <summary>   /// 设置使用DES方法加密之后的Cookie   /// </summary>   /// <param name="key"></param>   /// <param name="valueString"></param>   public static void SetTripleDESEncryptedCookie(String key,String valueString)   {      ///获取关键字和值    key = EncryptString.EncryptTripleDES(key);    valueString = EncryptString.EncryptTripleDES(valueString);    ///设置Cookie    SetCookie(key,valueString);   }   /// <summary>   /// 设置使用DES方法加密之后的Cookie   /// </summary>   /// <param name="key"></param>   /// <param name="valueString"></param>   /// <param name="expires"></param>   public static void SetTripleDESEncryptedCookie(String key,String valueString,DateTime expires)   {      ///获取关键字和值    key = EncryptString.EncryptTripleDES(key);    valueString = EncryptString.EncryptTripleDES(valueString);    ///设置Cookie    SetCookie(key,valueString,expires);   }   /// <summary>   /// 设置加密之后的Cookie   /// </summary>   /// <param name="key"></param>   /// <param name="valueString"></param>   public static void SetEncryptedCookie(String key,String valueString)   {   ///获取关键字和值    key = EncryptString.Encrypt(key);    valueString = EncryptString.Encrypt(valueString);    ///设置Cookie    SetCookie(key,valueString);   }   /// <summary>   /// 设置加密之后的Cookie   /// </summary>   /// <param name="key"></param>   /// <param name="valueString"></param>   /// <param name="expires"></param>   public static void SetEncryptedCookie(String key,String valueString,DateTime expires)   {      ///获取关键字和值    key = EncryptString.Encrypt(key);    valueString = EncryptString.Encrypt(valueString);    ///设置Cookie    SetCookie(key,valueString,expires);   }   /// <summary>   /// 获取DES方法加密之后的Cookie   /// </summary>   /// <param name="key"></param>   /// <returns></returns>   public static String GetTripleDESEncryptedCookieValue(String key)   {      ///获取关键字和值    key = EncryptString.EncryptTripleDES(key);    String valueString = GetCookieValue(key);    ///获取Cookie    valueString = EncryptString.DecryptTripleDES(valueString);    return(valueString);      }   /// <summary>   /// 获取DES方法加密之后的Cookie   /// </summary>   /// <param name="key"></param>   /// <returns></returns>   public static String GetEncryptedCookieValue(String key)   {      ///获取关键字和值    key = EncryptString.Encrypt(key);    String valueString = GetCookieValue(key);    ///获取Cookie    valueString = EncryptString.Decrypt(valueString);    return(valueString);      }   /// <summary>   /// 获取Cookie   /// </summary>   /// <param name="key"></param>   /// <returns></returns>   public static HttpCookie GetCookie(String key)   {      ///获取关键字和值    key = HttpContext.Current.Server.UrlEncode(key);    ///获取Cookie    return(HttpContext.Current.Request.Cookies.Get(key));   }   /// <summary>   /// 获取Cookie   /// </summary>   /// <param name="key"></param>   /// <returns></returns>   public static String GetCookieValue(String key)   {      ///获取关键字和值    String valueString = GetCookie(key).Value;    ///获取Cookie    valueString = HttpContext.Current.Server.UrlDecode(valueString);    return(valueString);   }  } }