C#双重密钥激活软件和试用限制

【实例简介】这篇文章(https://www.daboke.com)介绍了如何使用明码和暗码组合的双重密钥给软件激活和试用限制。

【实例截图】

【核心代码】

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 Microsoft.Win32;
using System.IO;

namespace softwareTrial
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            label2.Visible = false;
        }

        string triaDate;//注册表中的注册日期
        string triaDateInFile;//TXT中的注册日期
        string registryKey = "";//注册表密钥
        string textKey = "";//TXT密钥
        int timeGap = 0;//时间间隔


        /// <summary>
        /// 判断注册表项目是否存在的方法
        /// </summary>
        /// <returns></returns>
        private bool IsRegeditItemExist()
        {
            string[] subkeyNames;
            RegistryKey hkml = Registry.CurrentUser;
            RegistryKey software = hkml.OpenSubKey("SOFTWARE");
            //RegistryKey software = hkml.OpenSubKey(SOFTWARE, true);
            subkeyNames = software.GetSubKeyNames();
            //取得该项下所有子项的名称的序列，并传递给预定的数组中  
            foreach (string keyName in subkeyNames) //遍历整个数组
            {
                if (keyName == "TestItem") //判断子项的名称
                {
                    hkml.Close();
                    return true;
                }
            }
            hkml.Close();
            return false;
        }


        /// <summary>
        /// 注册表写入密钥的方法
        /// </summary>
        private void RegistryWrite()
        {
            bool isExit = IsRegeditItemExist();
            if (isExit != true)
            {
                string sn, sm;
                sn = Time.CreatSerialNumber();
                sm = DES.DESEncrypt(sn, "12345678", "87654321");
                Time.WriteSetting("", "SerialNumber", sm);
            }
        }

        /// <summary>
        /// 创建隐藏文件的方法
        /// </summary>
        /// <param name="key"></param>
        public void createHiddentFile(string key)
        {
            //判断是否已经有了这个文件
            if (!System.IO.File.Exists("d:\\testtxt.txt"))
            {
                //没有则创建这个文件
                FileStream fs1 = new FileStream("d:\\testtxt.txt", FileMode.Create, FileAccess.Write);//创建写入文件                
                //设置文件属性为隐藏
                System.IO.File.SetAttributes(@"d:\\testtxt.txt", FileAttributes.Hidden);
                StreamWriter sw = new StreamWriter(fs1);
                sw.WriteLine(key.Trim());//开始写入值
                sw.Close();
                fs1.Close();
            }
            else
            {
                ;
            }

        }

        /// <summary>
        /// 读取隐藏文件的方法
        /// </summary>
        public void readHiddentFile()
        {
            string[] content = System.IO.File.ReadAllLines("d:\\testtxt.txt", Encoding.Default);
            if (System.IO.File.Exists("d:\\testtxt.txt"))
            {
                if (content != null)
                {
                    //txtExit = true;
                    for (int i = 0; i < content.Length; i  )
                    {
                        triaDateInFile = content[i];
                        triaDateInFile = DES.DESDecrypt(triaDateInFile, "12345678", "87654321");
                        textKey = triaDateInFile.Substring(triaDateInFile.Length - 8);
                    }
                }
                else
                {
                    ;
                }
            }
            else
            {
                ;
            }

        }


        private void Button1_Click(object sender, EventArgs e)
        {
            RegistryWrite();
            MessageBox.Show("已创建明码！");
        }

        private void Button2_Click(object sender, EventArgs e)
        {
            triaDate = Time.CreatSerialNumber();
            createHiddentFile(DES.DESEncrypt(triaDate, "12345678", "87654321"));
            MessageBox.Show("已创建暗码！");
        }

        private void Button3_Click(object sender, EventArgs e)
        {
            //注册表密钥
            RegistryKey key1 = Registry.CurrentUser.OpenSubKey("Software\\TestItem");
            if (key1 != null)
            {

                object obj1 = key1.GetValue("SerialNumber");
                string aa = obj1.ToString();
                string bb = DES.DESDecrypt(aa, "12345678", "87654321");
                registryKey = bb.Substring(bb.Length - 8);

                /* 比较时间 */
                string NowDate = Time.GetNowDate();
                timeGap = Convert.ToInt32(NowDate) - Convert.ToInt32(registryKey);
            }
            else
            {
                ;
            }

            //TXT密钥
            readHiddentFile();

            //注册表TestItem项是否存在
            bool itemExit = IsRegeditItemExist();


            if (registryKey == textKey && timeGap < Convert.ToInt32(textBox1.Text))
            {
                MessageBox.Show("密钥验证一致！");
                label2.Visible = true;
                label2.Text = "欢迎访问大博客(https://www.daboke.com)探索更多编程实战案例！";
            }
            else if (registryKey == textKey && timeGap > Convert.ToInt32(textBox1.Text))
            {
                MessageBox.Show("软件试用到期！");
                this.Close();
            }
            else if (itemExit == false)
            {
                MessageBox.Show("软件尚未注册，不可使用！");
            }
            else if (itemExit == true && registryKey != textKey)
            {
                MessageBox.Show("密钥验证不一致，请联系管理员！");
                this.Close();
            }
            else
            {
                MessageBox.Show("软件运行出错，请联系管理员！");
                this.Close();
            }

        }

        private void Button6_Click(object sender, EventArgs e)
        {
            System.Diagnostics.Process.Start("https://www.daboke.com");//欢迎访问大博客，探索更多编程实战案例！
        }

        private void Button7_Click(object sender, EventArgs e)
        {
            System.Diagnostics.Process.Start("https://www.daboke.com/program/activationandtrial");//原文链接！
        }
    }
}