C# 数据的加密解密

        /// <summary> /// 加密数据 /// </summary> /// <param name="Text"></param> /// <param name="sKey"></param> /// <returns></returns> public static string Encrypt(string Text, string sKey){DESCryptoServiceProvider des = new DESCryptoServiceProvider();byte[] inputByteArray;inputByteArray = Encoding.Default.GetBytes(Text);des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));System.IO.MemoryStream ms = new System.IO.MemoryStream();CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);cs.Write(inputByteArray, 0, inputByteArray.Length);cs.FlushFinalBlock();StringBuilder ret = new StringBuilder();foreach (byte b in ms.ToArray()){ret.AppendFormat("{0:X2}", b);}return ret.ToString();}#endregion#region ========解密========/// <summary>/// 解密/// </summary>/// <param name="Text"></param>/// <returns></returns>public static string Decrypt(string Text){return Decrypt(Text, "DTcms");}/// <summary> /// 解密数据 /// </summary> /// <param name="Text"></param> /// <param name="sKey"></param> /// <returns></returns> public static string Decrypt(string Text, string sKey){DESCryptoServiceProvider des = new DESCryptoServiceProvider();int len;len = Text.Length / 2;byte[] inputByteArray = new byte[len];int x, i;for (x = 0; x < len; x++){i = Convert.ToInt32(Text.Substring(x * 2, 2), 16);inputByteArray[x] = (byte)i;}des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));System.IO.MemoryStream ms = new System.IO.MemoryStream();CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);cs.Write(inputByteArray, 0, inputByteArray.Length);cs.FlushFinalBlock();return Encoding.Default.GetString(ms.ToArray());}#endregion