实例介绍
【实例简介】
加密后文件后缀为 .mrexe，加密后文件不可打开，只能通过此程序打开了
【实例截图】
【核心代码】
需要引用：using Microsoft.Win32;
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
{
}
}
}
标签： 加密
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