using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Text;
using System.IO;
using System.Security.Cryptography;

public partial class Default2 : System.Web.UI.Page
{
  protected void Page_Load(object sender, EventArgs e)
  {

  }
  private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };//自定义密匙
  private string filePathA;//储存文件路径
  private string filePathB;//储存文件复制后的路径
  /// <summary>
  /// 文件加密
  /// </summary>
  /// <param name="inFile">文件储存路径</param>
  /// <param name="outFile">储存文件复制的路径</param>
  /// <param name="encryptKey"></param>
  /// <returns></returns>
  public bool EncryptDES(string inFile, string outFile, string encryptKey)
  {
  byte[] rgb = Keys;
  try
  {
  byte[] rgbKeys = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
  FileStream inFs = new FileStream(inFile, FileMode.Open, FileAccess.Read);//读入流
  FileStream outFs = new FileStream(outFile, FileMode.OpenOrCreate, FileAccess.Write);// 等待写入流
  outFs.SetLength(0);//帮助读写的变量
  byte[] byteIn = new byte[100];//放临时读入的流
  long readLen = 0;//读入流的长度
  long totalLen = inFs.Length;//读入流的总长度
  int everylen=0;//每次读入流的长度
  DES des = new DESCryptoServiceProvider();//将inFile加密后放到outFile
  CryptoStream encStream = new CryptoStream(outFs, des.CreateEncryptor(rgb, rgbKeys), CryptoStreamMode.Write);
  while (readLen < totalLen)
  {
  everylen = inFs.Read(byteIn, 0, 100);
  encStream.Write(byteIn, 0, everylen);
  readLen = readLen + everylen;
  }
  encStream.Close();
  inFs.Close();
  outFs.Close();
  return true;//加密成功
  }
  catch (Exception ex)
  {
  Response.Write(ex.Message.ToString());
  return false;//加密失败
  }
  }


  public bool DecryptDES(string inFile, string outFile, string encryptKey)
  {
  byte[] rgb = Keys;
  try
  {
  byte[] rgbKeys = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
  FileStream inFs = new FileStream(inFile, FileMode.Open, FileAccess.Read);//读入流
  FileStream outFs = new FileStream(outFile, FileMode.OpenOrCreate, FileAccess.Write);// 等待写入流
  outFs.SetLength(0);//帮助读写的变量
  byte[] byteIn = new byte[100];//放临时读入的流
  long readLen = 0;//读入流的长度
  long totalLen = inFs.Length;//读入流的总长度
  int everylen=0;//每次读入流的长度
  DES des = new DESCryptoServiceProvider();//将inFile加密后放到outFile
  CryptoStream encStream = new CryptoStream(outFs, des.CreateDecryptor(rgb, rgbKeys), CryptoStreamMode.Write);
  while (readLen < totalLen)
  {
  everylen = inFs.Read(byteIn, 0, 100);
  encStream.Write(byteIn, 0, everylen);
  readLen = readLen + everylen;
  }
  encStream.Close();
  inFs.Close();
  outFs.Close();
  return true;//加密成功
  }
  catch (Exception ex)
  {
  Response.Write(ex.Message.ToString());
  return false;//加密失败
  }
  }
  /// <summary>
  /// 拷贝文件
  /// </summary>
  public void copyFile()
  {
  filePathA = this.fei.PostedFile.FileName;//获取文件全部路径
  string fileName = this.fei.FileName;
  string path = System.IO.Path.GetDirectoryName(filePathA);
  filePathB = path + "\\1" + fileName;//重新设置文件名
  File.Copy(filePathA, filePathB);
  }

  protected void btnOK_Click(object sender, EventArgs e)
  {
  copyFile();
  if (EncryptDES(filePathB, filePathA, "mingrisoft"))
  {
  RegisterStartupScript("false", "<script>alert('加密成功!\\n');</script>");
  }
  else
  {
  RegisterStartupScript("false", "<script>alert('失败成功!\\n');</script>");
  }
  File.Delete(filePathB);
  }
  protected void btnC