详解C#如何加密解密RAR文件

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2023-07-14
基于C#实现磁性吸附窗体
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C#实现对文件进行加密保护的示例代码
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标签   C#
目录
  • 实践过程
  • 效果
  • 代码

实践过程

效果

代码

public partial class Form : Form
{
    public Form()
    {
        InitializeComponent();
    }
 
    private void Form_Load(object sender, EventArgs e)
    {
        FileMenu(Application.ExecutablePath + ",", Application.ExecutablePath);
        string[] str = Environment.GetCommandLineArgs();
        try
        {
            string strFile = "";
            for (int i =; i < str.Length; i++)
                strFile += str[i];
            FileInfo FInfo = new FileInfo(strFile);
            if (FInfo.Extension.ToLower() == ".mrrar")
                textBox.Text = strFile;
        }
        catch { }
    }
    
    //选择要加密或解密的文件
    private void button_Click(object sender, EventArgs e)
    {
        openFileDialog.Filter = "*.rar(rar压缩文件)|*.rar|*.mrrar(mrrar加密文件)|*.mrrar|*.*(所有文件)|*.*";
        if (openFileDialog.ShowDialog() == DialogResult.OK)
            textBox.Text = openFileDialog1.FileName;
    }
 
    //加密rar文件
    private void button_Click(object sender, EventArgs e)
    {
        string strPwd = textBox.Text;
        byte[] btRKey = new byte[];
        if (strPwd.Length ==)
        {
            btRKey = new byte[] { (byte)strPwd[], (byte)strPwd[1], (byte)strPwd[2], (byte)strPwd[3], (byte)strPwd[4], (byte)strPwd[5], (byte)strPwd[0], (byte)strPwd[1] };
        }
        if (strPwd.Length ==)
        {
            btRKey = new byte[] { (byte)strPwd[], (byte)strPwd[1], (byte)strPwd[2], (byte)strPwd[3], (byte)strPwd[4], (byte)strPwd[5], (byte)strPwd[6], (byte)strPwd[0] };
        }
        if (strPwd.Length >=)
        {
            btRKey = new byte[] { (byte)strPwd[], (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(textBox.Text, FileMode.Open, FileAccess.Read);
        FileStream NewFStream = new FileStream(textBox.Text + ".mrrar", FileMode.OpenOrCreate, FileAccess.Write);
        NewFStream.SetLength((long));
        byte[] buffer = new byte[x400];
        int MinNum =;
        long length = FStream.Length;
        int MaxNum = (int)(length / ((long)x400));
        DES myDES = new DESCryptoServiceProvider();
        CryptoStream CStream = new CryptoStream(NewFStream, myDES.CreateEncryptor(btRKey, btRKey), CryptoStreamMode.Write);
        while (MinNum < length)
        {
            int count = FStream.Read(buffer,, 0x400);
            CStream.Write(buffer,, count);
            MinNum += count;
        }
        CStream.Close();
        NewFStream.Close();
        FStream.Close();
        File.Delete(textBox.Text);
        MessageBox.Show("使用口令加密rar文件成功！", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
    }
 
    //解密rar文件
    private void button_Click(object sender, EventArgs e)
    {
        string strPwd = textBox.Text;
        FileStream FStream = null;
        FileStream NewFStream = null;
        CryptoStream CStream = null;
        try
        {
            try
            {
                byte[] btRKey = new byte[];
                if (strPwd.Length ==)
                {
                    btRKey = new byte[] { (byte)strPwd[], (byte)strPwd[1], (byte)strPwd[2], (byte)strPwd[3], (byte)strPwd[4], (byte)strPwd[5], (byte)strPwd[0], (byte)strPwd[1] };
                }
                if (strPwd.Length ==)
                {
                    btRKey = new byte[] { (byte)strPwd[], (byte)strPwd[1], (byte)strPwd[2], (byte)strPwd[3], (byte)strPwd[4], (byte)strPwd[5], (byte)strPwd[6], (byte)strPwd[0] };
                }
                if (strPwd.Length >=)
                {
                    btRKey = new byte[] { (byte)strPwd[], (byte)strPwd[1], (byte)strPwd[2], (byte)strPwd[3], (byte)strPwd[4], (byte)strPwd[5], (byte)strPwd[6], (byte)strPwd[7] };
                }
                FStream = new FileStream(textBox.Text, FileMode.Open, FileAccess.Read);
                string strNewFile = textBox.Text.Substring(0, textBox1.Text.Length - 6);
                NewFStream = new FileStream(strNewFile, FileMode.OpenOrCreate, FileAccess.Write);
                NewFStream.SetLength((long));
                byte[] buffer = new byte[x400];
                int MinNum =;
                long length = FStream.Length;
                int MaxNum = (int)(length / ((long)x400));
                DES myDES = new DESCryptoServiceProvider();
                CStream = new CryptoStream(NewFStream, myDES.CreateDecryptor(btRKey, btRKey), CryptoStreamMode.Write);
                while (MinNum < length)
                {
                    int count = FStream.Read(buffer,, 0x400);
                    CStream.Write(buffer,, count);
                    MinNum += count;
                }
                CStream.Close();
                FStream.Close();
                NewFStream.Close();
                File.Delete(textBox.Text);
                System.Diagnostics.Process.Start(strNewFile);
            }
            catch
            {
                MessageBox.Show("口令错误！", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
                textBox.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(".mrrar");
            RegistryKey RKey = Registry.ClassesRoot.OpenSubKey(".mrrar", true);
            RKey.SetValue("", "mrrarfile");
            RKey.Close();
            Registry.ClassesRoot.CreateSubKey("mrrarfile");
            RegistryKey RKey = Registry.ClassesRoot.OpenSubKey("mrrarfile", true);
            RKey.CreateSubKey("DefaultIcon");
            RKey.CreateSubKey("shell");
            RKey.Close();
            RegistryKey RKey = Registry.ClassesRoot.OpenSubKey("mrrarfile\\DefaultIcon", true);
            RKey.SetValue("", strPath);
            RKey.Close();
            RegistryKey RKey = Registry.ClassesRoot.OpenSubKey("mrrarfile\\shell", true);
            RKey.CreateSubKey("使用口令打开");
            RKey.Close();
            RegistryKey RKey = Registry.ClassesRoot.OpenSubKey("mrrarfile\\shell\\使用口令打开", true);
            RKey.CreateSubKey("command");
            RKey.Close();
            RegistryKey RKey = Registry.ClassesRoot.OpenSubKey("mrrarfile\\shell\\使用口令打开\\command", true);
            RKey.SetValue("", strName + " \\F %1");
            RKey.Close();
        }
        catch
        {
        }
    }
}
partial class Form
{
    /// <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.button = new System.Windows.Forms.Button();
        this.button = new System.Windows.Forms.Button();
        this.groupBox = new System.Windows.Forms.GroupBox();
        this.label = new System.Windows.Forms.Label();
        this.textBox = new System.Windows.Forms.TextBox();
        this.button = new System.Windows.Forms.Button();
        this.label = new System.Windows.Forms.Label();
        this.label = new System.Windows.Forms.Label();
        this.textBox = new System.Windows.Forms.TextBox();
        this.openFileDialog = new System.Windows.Forms.OpenFileDialog();
        this.groupBox.SuspendLayout();
        this.SuspendLayout();
        // 
        // button
        // 
        this.button.Location = new System.Drawing.Point(250, 107);
        this.button.Name = "button3";
        this.button.Size = new System.Drawing.Size(59, 27);
        this.button.TabIndex = 11;
        this.button.Text = "打开";
        this.button.UseVisualStyleBackColor = true;
        this.button.Click += new System.EventHandler(this.button3_Click);
        // 
        // button
        // 
        this.button.Location = new System.Drawing.Point(185, 107);
        this.button.Name = "button2";
        this.button.Size = new System.Drawing.Size(59, 27);
        this.button.TabIndex = 12;
        this.button.Text = "加密";
        this.button.UseVisualStyleBackColor = true;
        this.button.Click += new System.EventHandler(this.button2_Click);
        // 
        // groupBox
        // 
        this.groupBox.Controls.Add(this.label1);
        this.groupBox.Controls.Add(this.textBox1);
        this.groupBox.Controls.Add(this.button1);
        this.groupBox.Controls.Add(this.label3);
        this.groupBox.Controls.Add(this.label2);
        this.groupBox.Controls.Add(this.textBox2);
        this.groupBox.Location = new System.Drawing.Point(5, 9);
        this.groupBox.Name = "groupBox1";
        this.groupBox.Size = new System.Drawing.Size(304, 92);
        this.groupBox.TabIndex = 10;
        this.groupBox.TabStop = false;
        this.groupBox.Text = "rar文件加/解密设置";
        // 
        // label
        // 
        this.label.AutoSize = true;
        this.label.Location = new System.Drawing.Point(6, 17);
        this.label.Name = "label1";
        this.label.Size = new System.Drawing.Size(95, 12);
        this.label.TabIndex = 0;
        this.label.Text = "请选择rar文件：";
        // 
        // textBox
        // 
        this.textBox.Location = new System.Drawing.Point(32, 35);
        this.textBox.Name = "textBox1";
        this.textBox.Size = new System.Drawing.Size(225, 21);
        this.textBox.TabIndex = 1;
        // 
        // button
        // 
        this.button.Location = new System.Drawing.Point(263, 33);
        this.button.Name = "button1";
        this.button.Size = new System.Drawing.Size(33, 23);
        this.button.TabIndex = 2;
        this.button.Text = "…";
        this.button.UseVisualStyleBackColor = true;
        this.button.Click += new System.EventHandler(this.button1_Click);
        // 
        // label
        // 
        this.label.AutoSize = true;
        this.label.ForeColor = System.Drawing.Color.Red;
        this.label.Location = new System.Drawing.Point(201, 66);
        this.label.Name = "label3";
        this.label.Size = new System.Drawing.Size(95, 12);
        this.label.TabIndex = 5;
        this.label.Text = "(密码应大于6位)";
        // 
        // label
        // 
        this.label.AutoSize = true;
        this.label.Location = new System.Drawing.Point(7, 66);
        this.label.Name = "label2";
        this.label.Size = new System.Drawing.Size(65, 12);
        this.label.TabIndex = 3;
        this.label.Text = "加密口令：";
        // 
        // textBox
        // 
        this.textBox.Location = new System.Drawing.Point(73, 63);
        this.textBox.Name = "textBox2";
        this.textBox.PasswordChar = '*';
        this.textBox.Size = new System.Drawing.Size(127, 21);
        this.textBox.TabIndex = 4;
        // 
        // openFileDialog
        // 
        this.openFileDialog.FileName = "openFileDialog1";
        // 
        // Form
        // 
        this.AutoScaleDimensions = new System.Drawing.SizeF(F, 12F);
        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
        this.ClientSize = new System.Drawing.Size(, 140);
        this.Controls.Add(this.button);
        this.Controls.Add(this.button);
        this.Controls.Add(this.groupBox);
        this.MaximizeBox = false;
        this.MinimizeBox = false;
        this.Name = "Form";
        this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
        this.Text = "用口令加密rar压缩文件";
        this.Load += new System.EventHandler(this.Form_Load);
        this.groupBox.ResumeLayout(false);
        this.groupBox.PerformLayout();
        this.ResumeLayout(false);
 
    }
 
    #endregion
 
    private System.Windows.Forms.Button button;
    private System.Windows.Forms.Button button;
    private System.Windows.Forms.GroupBox groupBox;
    private System.Windows.Forms.Label label;
    private System.Windows.Forms.TextBox textBox;
    private System.Windows.Forms.Button button;
    private System.Windows.Forms.Label label;
    private System.Windows.Forms.Label label;
    private System.Windows.Forms.TextBox textBox;
    private System.Windows.Forms.OpenFileDialog openFileDialog;
}
基于C#实现磁性吸附窗体
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C#实现对文件进行加密保护的示例代码
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