using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Security.Cryptography;
using System.IO;
using System.Threading;
namespace DES加密
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
}
//加密
private void button1_Click(object sender, EventArgs e)
{
label1.Visible = true;
progressBar1.Visible = true;
if (mima1.Text != mima2.Text)
{
MessageBox.Show("两次输入的密码不一致");
}
else if (mima1.Text.Length < 6 || mima1.Text.Length > 8)
{
MessageBox.Show("密码输入的长度不符合要求（6-8位）");
}
else
{
Thread tt = new Thread(star);
tt.IsBackground = true;
kg = 1;
myKey = mima1.Text;
noww = 1;
myInFileName = shuru.Text;
myOutFileName = shuchu.Text + '\' + mingzi.Text + "." + houzhui.Text;
tt.Start();
}
}
//解密
private void button2_Click(object sender, EventArgs e)
{
progressBar1.Visible = true;
label1.Visible = true;
if (mima1.Text != mima2.Text)
{
MessageBox.Show("两次输入的密码不一致");
}
else if (mima1.Text.Length < 6 || mima1.Text.Length > 8)
{
MessageBox.Show("密码输入的长度不符合要求（6-8位）");
}
else
{
Thread tt = new Thread(star);
tt.IsBackground = true;
kg = 2;
myKey = mima1.Text;
noww = 1;
myInFileName = shuru.Text;
myOutFileName = shuchu.Text + '\' + mingzi.Text + "." + houzhui.Text;
tt.Start();
}
}
//加密解密函数
int kg ,noww = 0;//0没事干，1正在执行，2失败，3成功
string myInFileName, myOutFileName ,myKey ;
int pp = 0;
string ll = "0";
public void star()
{
try
{
//设定秘钥初始值和偏移量
byte[] myDESIV = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08 };
byte[] myDESKey = { };
//根据密码长度设置秘钥
if (myKey.Length == 6)
myDESKey = new byte[] { (byte)myKey[0], (byte)myKey[1], (byte)myKey[2], (byte)myKey[3], (byte)myKey[4], (byte)myKey[5], 0x07, 0x08 };
if (myKey.Length == 7)
myDESKey = new byte[] { (byte)myKey[0], (byte)myKey[1], (byte)myKey[2], (byte)myKey[3], (byte)myKey[4], (byte)myKey[5], (byte)myKey[6], 0x08 };
if (myKey.Length == 8)
myDESKey = new byte[] { (byte)myKey[0], (byte)myKey[1], (byte)myKey[2], (byte)myKey[3], (byte)myKey[4], (byte)myKey[5], (byte)myKey[6], (byte)myKey[7] };
//创建输入输出文件流
FileStream myInFileStream = new FileStream(myInFileName, FileMode.Open, FileAccess.Read);
FileStream myOutFileStream = new FileStream(myOutFileName, FileMode.OpenOrCreate, FileAccess.Write);
myOutFileStream.SetLength(0);//这个暂时不清楚
//每次的中间流
byte[] tmp = new byte[100];
//已经传输的长度
long nowLength = 0;
//总长度，也是输入的文件流的长度
long allLength = myInFileStream.Length;
//创建DES对象
DES myDES = new DESCryptoServiceProvider();
CryptoStream myCryptoStream;
if (kg == 1)//加密流
myCryptoStream = new CryptoStream(myOutFileStream, myDES.CreateEncryptor(myDESKey, myDESIV), CryptoStreamMode.Write);
else//解密流
myCryptoStream = new CryptoStream(myOutFileStream, myDES.CreateDecryptor(myDESKey, myDESIV), CryptoStreamMode.Write);
//从输入文件中读取流，然后加入到输出文件流，中间用中间流传输
double nowjd = 0;
double gg = 0;
pp = 0;
ll = "0";
while (nowLength < allLength)
{
//每次写入加密（解密）文件数据的大小
int length = myInFileStream.Read(tmp, 0, 100);
myCryptoStream.Write(tmp, 0, length);
nowLength += length;
nowjd = (double)nowLength / (double)allLength;
if (nowjd - gg >= 0.01)
{
gg = nowjd;
pp = int.Parse((nowLength * 100 / allLength).ToString());
ll = (nowjd * 100).ToString();
}
}
int mk = 0;
//关闭流
try
{
myCryptoStream.Close();
}
catch
{
mk = 1;
}
try
{
myInFileStream.Close();
}
catch
{
mk = 1;
}
try
{
myOutFileStream.Close();
}
catch
{
mk = 1;
}
if (mk == 1) noww = 2;
//更新100%
nowjd = 100;
//label1.Text = nowjd.ToString();
//label1.Refresh();
noww = 3;
}
catch
{
noww = 2;
}
}
private void label2_Click(object sender, EventArgs e)
{
//文件浏览
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
shuru .Text = openFileDialog1.FileName;
}
}
private void label3_Click(object sender, EventArgs e)
{
//文件夹浏览
folderBrowserDialog1.SelectedPath = "";
folderBrowserDialog1.ShowDialog();
if (folderBrowserDialog1.SelectedPath != "")
shuchu.Text = folderBrowserDialog1.SelectedPath;
}
private void timer1_Tick(object sender, EventArgs e)
{
label1.Text = ll;
progressBar1.Value = pp;
label1.Refresh();
if (noww == 2)
{
noww = 0;
if(kg == 1)
{
try
{
File.Delete(shuchu.Text + '\' + mingzi.Text + "." + houzhui.Text);
}
catch { }
MessageBox.Show("加密失败");
label1.Text = "0";
progressBar1.Visible = false ;
label1.Visible = false ;
}
else
{
try
{ //删除没有价值的失败文件
File.Delete(shuchu.Text + '\' + mingzi.Text + "." + houzhui.Text);
}
catch { }
MessageBox.Show("解密失败");
label1.Text = "0";
label1.Visible = false ;
progressBar1.Visible = false ;
}
}
if(noww == 3)
{
noww = 0;
if(kg == 1)
{
try
{
if (checkBox1.Checked)
File.Delete(@shuru.Text);
}
catch { }
MessageBox.Show("加密成功");
label1.Text = "0";
progressBar1.Visible = false ;
label1.Visible = false ;
}
else
{
try
{
if(checkBox2.Checked)
File.Delete(@shuru.Text);
}
catch { }
MessageBox.Show("解密成功");
label1.Text = "0";
label1.Visible = false ;
progressBar1.Visible = false ;
}
}
}
}
}