C#实现加密exe文件

实践过程

效果

代码

public partial class Form1 : Form
{
  public Form1()
  {
      InitializeComponent();
  }

  private void Form1_Load(object sender, EventArgs e)
  {
      FileMenu(Application.ExecutablePath + ",0", Application.ExecutablePath);
      string[] str = Environment.GetCommandLineArgs();
      try
      {
          string strFile = "";
          for (int i = 2; i < str.Length; i++)
              strFile += str[i];
          FileInfo FInfo = new FileInfo(strFile);
          if (FInfo.Extension.ToLower() == ".mrexe")
              textBox1.Text = strFile;
      }
      catch { }
  }
  
  //选择要加密或解密的文件
  private void button1_Click(object sender, EventArgs e)
  {
      openFileDialog1.Filter = "*.exe(exe可执行文件)|*.exe|*.mrexe(mrexe加密文件)|*.mrexe|*.*(所有文件)|*.*";
      if (openFileDialog1.ShowDialog() == DialogResult.OK)
          textBox1.Text = openFileDialog1.FileName;
  }

  //加密EXE文件
  private void button2_Click(object sender, EventArgs e)
  {
      string strPwd = textBox2.Text;
      byte[] btRKey = new byte[0];
      if (strPwd.Length == 6)
      {
          btRKey = new byte[] { (byte)strPwd[0], (byte)strPwd[1], (byte)strPwd[2], (byte)strPwd[3], (byte)strPwd[4], (byte)strPwd[5], (byte)strPwd[0], (byte)strPwd[1] };
      }
      if (strPwd.Length == 7)
      {
          btRKey = new byte[] { (byte)strPwd[0], (byte)strPwd[1], (byte)strPwd[2], (byte)strPwd[3], (byte)strPwd[4], (byte)strPwd[5], (byte)strPwd[6], (byte)strPwd[0] };
      }
      if (strPwd.Length >= 8)
      {
          btRKey = new byte[] { (byte)strPwd[0], (byte)strPwd[1], (byte)strPwd[2], (byte)strPwd[3], (byte)strPwd[4], (byte)strPwd[5], (byte)strPwd[6], (byte)strPwd[7] };
      }
      FileStream FStream = new FileStream(textBox1.Text, FileMode.Open, FileAccess.Read);
      FileStream NewFStream = new FileStream(textBox1.Text + ".mrexe", FileMode.OpenOrCreate, FileAccess.Write);
      NewFStream.SetLength((long)0);
      byte[] buffer = new byte[0x400];
      int MinNum = 0;
      long length = FStream.Length;
      int MaxNum = (int)(length / ((long)0x400));
      DES myDES = new DESCryptoServiceProvider();
      CryptoStream CStream = new CryptoStream(NewFStream, myDES.CreateEncryptor(btRKey, btRKey), CryptoStreamMode.Write);
      while (MinNum < length)
      {
          int count = FStream.Read(buffer, 0, 0x400);
          CStream.Write(buffer, 0, count);
          MinNum += count;
      }
      CStream.Close();
      NewFStream.Close();
      FStream.Close();
      File.Delete(textBox1.Text);
      MessageBox.Show("使用口令加密可执行文件成功！", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
  }

  //解密EXE文件
  private void button3_Click(object sender, EventArgs e)
  {
      string strPwd = textBox2.Text;
      FileStream FStream = null;
      FileStream NewFStream = null;
      CryptoStream CStream = null;
      try
      {
          try
          {
              byte[] btRKey = new byte[0];
              if (strPwd.Length == 6)
              {
                  btRKey = new byte[] { (byte)strPwd[0], (byte)strPwd[1], (byte)strPwd[2], (byte)strPwd[3], (byte)strPwd[4], (byte)strPwd[5], (byte)strPwd[0], (byte)strPwd[1] };
              }
              if (strPwd.Length == 7)
              {
                  btRKey = new byte[] { (byte)strPwd[0], (byte)strPwd[1], (byte)strPwd[2], (byte)strPwd[3], (byte)strPwd[4], (byte)strPwd[5], (byte)strPwd[6], (byte)strPwd[0] };
              }
              if (strPwd.Length >= 8)
              {
                  btRKey = new byte[] { (byte)strPwd[0], (byte)strPwd[1], (byte)strPwd[2], (byte)strPwd[3], (byte)strPwd[4], (byte)strPwd[5], (byte)strPwd[6], (byte)strPwd[7] };
              }
              FStream = new FileStream(textBox1.Text, FileMode.Open, FileAccess.Read);
              string strNewFile = textBox1.Text.Substring(0, textBox1.Text.Length - 6);
              NewFStream = new FileStream(strNewFile, FileMode.OpenOrCreate, FileAccess.Write);
              NewFStream.SetLength((long)0);
              byte[] buffer = new byte[0x400];
              int MinNum = 0;
              long length = FStream.Length;
              int MaxNum = (int)(length / ((long)0x400));
              DES myDES = new DESCryptoServiceProvider();
              CStream = new CryptoStream(NewFStream, myDES.CreateDecryptor(btRKey, btRKey), CryptoStreamMode.Write);
              while (MinNum < length)
              {
                  int count = FStream.Read(buffer, 0, 0x400);
                  CStream.Write(buffer, 0, count);
                  MinNum += count;
              }
              CStream.Close();
              FStream.Close();
              NewFStream.Close();
              File.Delete(textBox1.Text);
              System.Diagnostics.Process.Start(strNewFile);
          }
          catch
          {
              MessageBox.Show("口令错误！", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
              textBox2.Focus();
          }
      }
      finally
      {
          CStream.Close();
          FStream.Close();
          NewFStream.Close();
      }
  }

  //创建快捷菜单
  public static void FileMenu(string strPath, string strName)
  {
      try
      {
          Registry.ClassesRoot.CreateSubKey(".mrexe");
          RegistryKey RKey1 = Registry.ClassesRoot.OpenSubKey(".mrexe", true);
          RKey1.SetValue("", "mrexefile");
          RKey1.Close();
          Registry.ClassesRoot.CreateSubKey("mrexefile");
          RegistryKey RKey2 = Registry.ClassesRoot.OpenSubKey("mrexefile", true);
          RKey2.CreateSubKey("DefaultIcon");
          RKey2.CreateSubKey("shell");
          RKey2.Close();
          RegistryKey RKey3 = Registry.ClassesRoot.OpenSubKey("mrexefile\\DefaultIcon", true);
          RKey3.SetValue("", strPath);
          RKey3.Close();
          RegistryKey RKey4 = Registry.ClassesRoot.OpenSubKey("mrexefile\\shell", true);
          RKey4.CreateSubKey("使用口令打开");
          RKey4.Close();
          RegistryKey RKey5 = Registry.ClassesRoot.OpenSubKey("mrexefile\\shell\\使用口令打开", true);
          RKey5.CreateSubKey("command");
          RKey5.Close();
          RegistryKey RKey6 = Registry.ClassesRoot.OpenSubKey("mrexefile\\shell\\使用口令打开\\command", true);
          RKey6.SetValue("", strName + " \\F %1");
          RKey6.Close();
      }
      catch
      {
      }
  }
}

partial class Form1
{
  /// <summary>
  /// 必需的设计器变量。
  /// </summary>
  private System.ComponentModel.IContainer components = null;

  /// <summary>
  /// 清理所有正在使用的资源。
  /// </summary>
  /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
  protected override void Dispose(bool disposing)
  {
      if (disposing && (components != null))
      {
          components.Dispose();
      }
      base.Dispose(disposing);
  }

  #region Windows 窗体设计器生成的代码

  /// <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.button3 = new System.Windows.Forms.Button();
      this.button2 = new System.Windows.Forms.Button();
      this.groupBox1 = new System.Windows.Forms.GroupBox();
      this.label1 = new System.Windows.Forms.Label();
      this.textBox1 = new System.Windows.Forms.TextBox();
      this.button1 = new System.Windows.Forms.Button();
      this.label3 = new System.Windows.Forms.Label();
      this.label2 = new System.Windows.Forms.Label();
      this.textBox2 = new System.Windows.Forms.TextBox();
      this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
      this.groupBox1.SuspendLayout();
      this.SuspendLayout();
      // 
      // button3
      // 
      this.button3.Location = new System.Drawing.Point(250, 107);
      this.button3.Name = "button3";
      this.button3.Size = new System.Drawing.Size(59, 27);
      this.button3.TabIndex = 11;
      this.button3.Text = "打开";
      this.button3.UseVisualStyleBackColor = true;
      this.button3.Click += new System.EventHandler(this.button3_Click);
      // 
      // button2
      // 
      this.button2.Location = new System.Drawing.Point(185, 107);
      this.button2.Name = "button2";
      this.button2.Size = new System.Drawing.Size(59, 27);
      this.button2.TabIndex = 12;
      this.button2.Text = "加密";
      this.button2.UseVisualStyleBackColor = true;
      this.button2.Click += new System.EventHandler(this.button2_Click);
      // 
      // groupBox1
      // 
      this.groupBox1.Controls.Add(this.label1);
      this.groupBox1.Controls.Add(this.textBox1);
      this.groupBox1.Controls.Add(this.button1);
      this.groupBox1.Controls.Add(this.label3);
      this.groupBox1.Controls.Add(this.label2);
      this.groupBox1.Controls.Add(this.textBox2);
      this.groupBox1.Location = new System.Drawing.Point(5, 9);
      this.groupBox1.Name = "groupBox1";
      this.groupBox1.Size = new System.Drawing.Size(304, 92);
      this.groupBox1.TabIndex = 10;
      this.groupBox1.TabStop = false;
      this.groupBox1.Text = "Exe文件加/解密设置";
      // 
      // label1
      // 
      this.label1.AutoSize = true;
      this.label1.Location = new System.Drawing.Point(6, 17);
      this.label1.Name = "label1";
      this.label1.Size = new System.Drawing.Size(95, 12);
      this.label1.TabIndex = 0;
      this.label1.Text = "请选择Exe文件：";
      // 
      // textBox1
      // 
      this.textBox1.Location = new System.Drawing.Point(32, 35);
      this.textBox1.Name = "textBox1";
      this.textBox1.Size = new System.Drawing.Size(225, 21);
      this.textBox1.TabIndex = 1;
      // 
      // button1
      // 
      this.button1.Location = new System.Drawing.Point(263, 33);
      this.button1.Name = "button1";
      this.button1.Size = new System.Drawing.Size(33, 23);
      this.button1.TabIndex = 2;
      this.button1.Text = "…";
      this.button1.UseVisualStyleBackColor = true;
      this.button1.Click += new System.EventHandler(this.button1_Click);
      // 
      // label3
      // 
      this.label3.AutoSize = true;
      this.label3.ForeColor = System.Drawing.Color.Red;
      this.label3.Location = new System.Drawing.Point(201, 66);
      this.label3.Name = "label3";
      this.label3.Size = new System.Drawing.Size(95, 12);
      this.label3.TabIndex = 5;
      this.label3.Text = "(密码应大于6位)";
      // 
      // label2
      // 
      this.label2.AutoSize = true;
      this.label2.Location = new System.Drawing.Point(7, 66);
      this.label2.Name = "label2";
      this.label2.Size = new System.Drawing.Size(65, 12);
      this.label2.TabIndex = 3;
      this.label2.Text = "加密口令：";
      // 
      // textBox2
      // 
      this.textBox2.Location = new System.Drawing.Point(73, 63);
      this.textBox2.Name = "textBox2";
      this.textBox2.PasswordChar = '*';
      this.textBox2.Size = new System.Drawing.Size(127, 21);
      this.textBox2.TabIndex = 4;
      // 
      // openFileDialog1
      // 
      this.openFileDialog1.FileName = "openFileDialog1";
      // 
      // Form1
      // 
      this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
      this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
      this.ClientSize = new System.Drawing.Size(316, 140);
      this.Controls.Add(this.button3);
      this.Controls.Add(this.button2);
      this.Controls.Add(this.groupBox1);
      this.MaximizeBox = false;
      this.MinimizeBox = false;
      this.Name = "Form1";
      this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
      this.Text = "使用口令加密可执行文件";
      this.Load += new System.EventHandler(this.Form1_Load);
      this.groupBox1.ResumeLayout(false);
      this.groupBox1.PerformLayout();
      this.ResumeLayout(false);

  }

  #endregion

  private System.Windows.Forms.Button button3;
  private System.Windows.Forms.Button button2;
  private System.Windows.Forms.GroupBox groupBox1;
  private System.Windows.Forms.Label label1;
  private System.Windows.Forms.TextBox textBox1;
  private System.Windows.Forms.Button button1;
  private System.Windows.Forms.Label label3;
  private System.Windows.Forms.Label label2;
  private System.Windows.Forms.TextBox textBox2;
  private System.Windows.Forms.OpenFileDialog openFileDialog1;
}

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 实践过程效果代码public partial class Form1 : Form{ public Form1() { InitializeComponent(); } private ...