C#软件license管理(简单软件注册机制)
最近做了一个绿色免安装软件,领导临时要求加个注册机制,不能让现场工程师随意复制。事出突然,只能在现场开发(离开现场软件就不受我们控了)。花了不到两个小时实现了简单的注册机制,稍作整理。
基本原理:1.软件一运行就把计算机的CPU、主板、BIOS、MAC地址记录下来,然后加密(key=key1)生成文件;2.注册机将该文件内容MD5加密后再进行一次加密(key=key2)保存成注册文件;3.注册验证的逻辑,计算机信息加密后(key=key1)加密md5==注册文件解密(key=key2);
另外,采用ConfuserEx将可执行文件加密;这样别人要破解也就需要点力气了(没打算防破解,本意只想防复制的),有能力破解的人也不在乎破解这个软件了(开发这个软件前后只花了一周时间而已);
技术上主要三个模块:1.获取电脑相关硬件信息(可参考);2.加密解密;3.读写文件;
1.获取电脑相关硬件信息代码:
- public class ComputerInfo
- {
- public static string GetComputerInfo()
- {
- string info = string.Empty;
- string cpu = GetCPUInfo();
- string baseBoard = GetBaseBoardInfo();
- string bios = GetBIOSInfo();
- string mac = GetMACInfo();
- info = string.Concat(cpu, baseBoard, bios, mac);
- return info;
- }
- private static string GetCPUInfo()
- {
- string info = string.Empty;
- info = GetHardWareInfo("Win32_Processor", "ProcessorId");
- return info;
- }
- private static string GetBIOSInfo()
- {
- string info = string.Empty;
- info = GetHardWareInfo("Win32_BIOS", "SerialNumber");
- return info;
- }
- private static string GetBaseBoardInfo()
- {
- string info = string.Empty;
- info = GetHardWareInfo("Win32_BaseBoard", "SerialNumber");
- return info;
- }
- private static string GetMACInfo()
- {
- string info = string.Empty;
- info = GetHardWareInfo("Win32_BaseBoard", "SerialNumber");
- return info;
- }
- private static string GetHardWareInfo(string typePath, string key)
- {
- try
- {
- ManagementClass managementClass = new ManagementClass(typePath);
- ManagementObjectCollection mn = managementClass.GetInstances();
- PropertyDataCollection properties = managementClass.Properties;
- foreach (PropertyData property in properties)
- {
- if (property.Name == key)
- {
- foreach (ManagementObject m in mn)
- {
- return m.Properties[property.Name].Value.ToString();
- }
- }
- }
- }
- catch (Exception ex)
- {
- //这里写异常的处理
- }
- return string.Empty;
- }
- private static string GetMacAddressByNetworkInformation()
- {
- string key = "SYSTEM\\CurrentControlSet\\Control\\Network\\{4D36E972-E325-11CE-BFC1-08002BE10318}\\";
- string macAddress = string.Empty;
- try
- {
- NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
- foreach (NetworkInterface adapter in nics)
- {
- if (adapter.NetworkInterfaceType == NetworkInterfaceType.Ethernet
- && adapter.GetPhysicalAddress().ToString().Length != 0)
- {
- string fRegistryKey = key + adapter.Id + "\\Connection";
- RegistryKey rk = Registry.LocalMachine.OpenSubKey(fRegistryKey, false);
- if (rk != null)
- {
- string fPnpInstanceID = rk.GetValue("PnpInstanceID", "").ToString();
- int fMediaSubType = Convert.ToInt32(rk.GetValue("MediaSubType", 0));
- if (fPnpInstanceID.Length > 3 &&
- fPnpInstanceID.Substring(0, 3) == "PCI")
- {
- macAddress = adapter.GetPhysicalAddress().ToString();
- for (int i = 1; i < 6; i++)
- {
- macAddress = macAddress.Insert(3 * i - 1, ":");
- }
- break;
- }
- }
- }
- }
- }
- catch (Exception ex)
- {
- //这里写异常的处理
- }
- return macAddress;
- }
- }
2.加密解密代码;
- public enum EncryptionKeyEnum
- {
- KeyA,
- KeyB
- }
- public class EncryptionHelper
- {
- string encryptionKeyA = "pfe_Nova";
- string encryptionKeyB = "WorkHard";
- string md5Begin = "Hello";
- string md5End = "World";
- string encryptionKey = string.Empty;
- public EncryptionHelper()
- {
- this.InitKey();
- }
- public EncryptionHelper(EncryptionKeyEnum key)
- {
- this.InitKey(key);
- }
- private void InitKey(EncryptionKeyEnum key = EncryptionKeyEnum.KeyA)
- {
- switch (key)
- {
- case EncryptionKeyEnum.KeyA:
- encryptionKey = encryptionKeyA;
- break;
- case EncryptionKeyEnum.KeyB:
- encryptionKey = encryptionKeyB;
- break;
- }
- }
- public string EncryptString(string str)
- {
- return Encrypt(str, encryptionKey);
- }
- public string DecryptString(string str)
- {
- return Decrypt(str, encryptionKey);
- }
- public string GetMD5String(string str)
- {
- str = string.Concat(md5Begin, str, md5End);
- MD5 md5 = new MD5CryptoServiceProvider();
- byte[] fromData = Encoding.Unicode.GetBytes(str);
- byte[] targetData = md5.ComputeHash(fromData);
- string md5String = string.Empty;
- foreach (var b in targetData)
- md5String += b.ToString("x2");
- return md5String;
- }
- private string Encrypt(string str, string sKey)
- {
- DESCryptoServiceProvider des = new DESCryptoServiceProvider();
- byte[] inputByteArray = Encoding.Default.GetBytes(str);
- des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
- des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
- MemoryStream ms = new MemoryStream();
- CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
- cs.Write(inputByteArray, 0, inputByteArray.Length);
- cs.FlushFinalBlock();
- StringBuilder ret = new StringBuilder();
- foreach (byte b in ms.ToArray())
- {
- ret.AppendFormat("{0:X2}", b);
- }
- ret.ToString();
- return ret.ToString();
- }
- private string Decrypt(string pToDecrypt, string sKey)
- {
- DESCryptoServiceProvider des = new DESCryptoServiceProvider();
- byte[] inputByteArray = new byte[pToDecrypt.Length / 2];
- for (int x = 0; x < pToDecrypt.Length / 2; x++)
- {
- int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16));
- inputByteArray[x] = (byte)i;
- }
- des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
- des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
- MemoryStream ms = new MemoryStream();
- CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
- cs.Write(inputByteArray, 0, inputByteArray.Length);
- cs.FlushFinalBlock();
- StringBuilder ret = new StringBuilder();
- return System.Text.Encoding.Default.GetString(ms.ToArray());
- }
- }
注:这边在MD5时前后各加了一段字符,这样增加一点破解难度。
3.读写文件
- public class RegistFileHelper
- {
- public static string ComputerInfofile = "ComputerInfo.key";
- public static string RegistInfofile = "RegistInfo.key";
- public static void WriteRegistFile(string info)
- {
- WriteFile(info, RegistInfofile);
- }
- public static void WriteComputerInfoFile(string info)
- {
- WriteFile(info, ComputerInfofile);
- }
- public static string ReadRegistFile()
- {
- return ReadFile(RegistInfofile);
- }
- public static string ReadComputerInfoFile()
- {
- return ReadFile(ComputerInfofile);
- }
- public static bool ExistComputerInfofile()
- {
- return File.Exists(ComputerInfofile);
- }
- public static bool ExistRegistInfofile()
- {
- return File.Exists(RegistInfofile);
- }
- private static void WriteFile(string info, string fileName)
- {
- try
- {
- using (StreamWriter sw = new StreamWriter(fileName, false))
- {
- sw.Write(info);
- sw.Close();
- }
- }
- catch (Exception ex)
- {
- }
- }
- private static string ReadFile(string fileName)
- {
- string info = string.Empty;
- try
- {
- using (StreamReader sr = new StreamReader(fileName))
- {
- info = sr.ReadToEnd();
- sr.Close();
- }
- }
- catch (Exception ex)
- {
- }
- return info;
- }
- }
4.其他界面代码:
主界面代码:
- public partial class FormMain : Form
- {
- private string encryptComputer = string.Empty;
- private bool isRegist = false;
- private const int timeCount = 30;
- public FormMain()
- {
- InitializeComponent();
- Control.CheckForIllegalCrossThreadCalls = false;
- }
- private void FormMain_Load(object sender, EventArgs e)
- {
- string computer = ComputerInfo.GetComputerInfo();
- encryptComputer = new EncryptionHelper().EncryptString(computer);
- if (CheckRegist() == true)
- {
- lbRegistInfo.Text = "已注册";
- }
- else
- {
- lbRegistInfo.Text = "待注册,运行十分钟后自动关闭";
- RegistFileHelper.WriteComputerInfoFile(encryptComputer);
- TryRunForm();
- }
- }
- /// <summary>
- /// 试运行窗口
- /// </summary>
- private void TryRunForm()
- {
- Thread threadClose = new Thread(CloseForm);
- threadClose.IsBackground = true;
- threadClose.Start();
- }
- private bool CheckRegist()
- {
- EncryptionHelper helper = new EncryptionHelper();
- string md5key = helper.GetMD5String(encryptComputer);
- return CheckRegistData(md5key);
- }
- private bool CheckRegistData(string key)
- {
- if (RegistFileHelper.ExistRegistInfofile() == false)
- {
- isRegist = false;
- return false;
- }
- else
- {
- string info = RegistFileHelper.ReadRegistFile();
- var helper = new EncryptionHelper(EncryptionKeyEnum.KeyB);
- string registData = helper.DecryptString(info);
- if (key == registData)
- {
- isRegist = true;
- return true;
- }
- else
- {
- isRegist = false;
- return false;
- }
- }
- }
- private void CloseForm()
- {
- int count = 0;
- while (count < timeCount && isRegist == false)
- {
- if (isRegist == true)
- {
- return;
- }
- Thread.Sleep(1 * 1000);
- count++;
- }
- if (isRegist == true)
- {
- return;
- }
- else
- {
- this.Close();
- }
- }
- private void btnRegist_Click(object sender, EventArgs e)
- {
- if (lbRegistInfo.Text == "已注册")
- {
- MessageBox.Show("已经注册~");
- return;
- }
- string fileName = string.Empty;
- OpenFileDialog openFileDialog = new OpenFileDialog();
- if (openFileDialog.ShowDialog() == DialogResult.OK)
- {
- fileName = openFileDialog.FileName;
- }
- else
- {
- return;
- }
- string localFileName = string.Concat(
- Environment.CurrentDirectory,
- Path.DirectorySeparatorChar,
- RegistFileHelper.RegistInfofile);
- if (fileName != localFileName)
- File.Copy(fileName, localFileName, true);
- if (CheckRegist() == true)
- {
- lbRegistInfo.Text = "已注册";
- MessageBox.Show("注册成功~");
- }
- }
- }
注册机代码:
- public partial class FormMain : Form
- {
- public FormMain()
- {
- InitializeComponent();
- }
- private void btnRegist_Click(object sender, EventArgs e)
- {
- string fileName = string.Empty;
- OpenFileDialog openFileDialog = new OpenFileDialog();
- if (openFileDialog.ShowDialog() == DialogResult.OK)
- {
- fileName = openFileDialog.FileName;
- }
- else
- {
- return;
- }
- string localFileName = string.Concat(
- Environment.CurrentDirectory,
- Path.DirectorySeparatorChar,
- RegistFileHelper.ComputerInfofile);
- if (fileName != localFileName)
- File.Copy(fileName, localFileName, true);
- string computer = RegistFileHelper.ReadComputerInfoFile();
- EncryptionHelper help = new EncryptionHelper(EncryptionKeyEnum.KeyB);
- string md5String = help.GetMD5String(computer);
- string registInfo = help.EncryptString(md5String);
- RegistFileHelper.WriteRegistFile(registInfo);
- MessageBox.Show("注册码已生成");
- }
- }
最后采用ConfuserEx将可执行文件加密(ConfuserEx介绍),这样就不能反编译获得源码。
至此全部完成,只是个人的一些实践,对自己是一个记录,同时希望也能对别人有些帮助,如果有什么错误,还望不吝指出,共同进步,转载请保留原文地址。