using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Security.Cryptography;
using System.Text;
using System.IO;
namespace CSDNRubbish
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
private SymmetricAlgorithm mCSP;
private const int KEYLENGTH=8;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null; public Form1()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent(); //
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
           this.mCSP=new DESCryptoServiceProvider();
} /// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null) 
{
components.Dispose();
}
}
if(mCSP!=null)
mCSP.Clear();
base.Dispose( disposing );
} #region Windows Form Designer generated code
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.textBox1 = new System.Windows.Forms.TextBox();
this.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.SuspendLayout();
// 
// textBox1
// 
this.textBox1.Anchor = (((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
| System.Windows.Forms.AnchorStyles.Left) 
| System.Windows.Forms.AnchorStyles.Right);
this.textBox1.Location = new System.Drawing.Point(0, 8);
this.textBox1.Multiline = true;
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(288, 208);
this.textBox1.TabIndex = 0;
this.textBox1.Text = "";
// 
// button1
// 
this.button1.Anchor = (System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left);
this.button1.Location = new System.Drawing.Point(8, 224);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(104, 32);
this.button1.TabIndex = 1;
this.button1.Text = "Encryptor";
this.button1.Click += new System.EventHandler(this.button1_Click);
// 
// button2
// 
this.button2.Anchor = (System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right);
this.button2.Location = new System.Drawing.Point(184, 224);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(96, 32);
this.button2.TabIndex = 2;
this.button2.Text = "Decryptor";
this.button2.Click += new System.EventHandler(this.button2_Click);
// 
// Form1
// 
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(292, 266);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
  this.button2,
  this.button1,
  this.textBox1});
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false); }
#endregion /// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main() 
{
Application.Run(new Form1());
} private void button1_Click(object sender, System.EventArgs e)
{
FileStream fs=null;
FileStream fsKey=null;
CryptoStream cs=null;
ICryptoTransform ct=null;
            if(textBox1.Text==String.Empty)
return;
try
{

                mCSP.GenerateKey();
mCSP.GenerateIV();
ct=mCSP.CreateEncryptor(mCSP.Key,mCSP.IV);
byte[] code1=Encoding.Default.GetBytes(textBox1.Text);
fsKey=new FileStream(@"d:\test.cry1",FileMode.Create,FileAccess.Write,FileShare.None);
fsKey.Write(mCSP.Key,0,KEYLENGTH);
fsKey.Write(mCSP.IV,0,KEYLENGTH);
fsKey.Flush();
fs=new FileStream(@"d:\test.cry",FileMode.Create,FileAccess.Write,FileShare.None);
cs=new CryptoStream(fs,ct,CryptoStreamMode.Write);
cs.Write(code1,0,code1.Length);
cs.FlushFinalBlock();
textBox1.Text=String.Empty;
}
catch{}
finally
{
if(fsKey!=null)
fsKey.Close();
if(cs!=null)
cs.Close();
if(fs!=null)
fs.Close();

}
} private void button2_Click(object sender, System.EventArgs e)
{
FileStream fs=null;
FileStream fsKey=null;
CryptoStream cs=null;
ICryptoTransform ct=null;
MemoryStream ms=null;
try
{
fsKey=new FileStream(@"d:\test.cry1",FileMode.Open,FileAccess.Read,FileShare.None);
Byte[] key=new Byte[KEYLENGTH];
Byte[] iv=new Byte[KEYLENGTH];
fsKey.Read(key,0,KEYLENGTH);
fsKey.Read(iv,0,KEYLENGTH);
ct=mCSP.CreateDecryptor(key,iv);
fs=new FileStream(@"d:\test.cry",FileMode.Open,FileAccess.Read,FileShare.None);
Byte[] code=new Byte[fs.Length];
fs.Read(code,0,(int)fs.Length);
ms=new MemoryStream();
cs=new CryptoStream(ms,ct,CryptoStreamMode.Write);
                cs.Write(code,0,(int)fs.Length);
cs.FlushFinalBlock();
textBox1.Text=Encoding.Default.GetString(ms.ToArray());
}
catch{}
finally
{
if(fsKey!=null)
fsKey.Close();
if(fs!=null)
fs.Close();
if(cs!=null)
cs.Close();
if(ms!=null)
ms.Close();
}
}
}
}