本文介绍了基于 本机特征信息（如CPU、主板、BIOS和MAC等） 的软件加密、授权与注册方法，并分享了 示例程序完整源代码。

1 加密、授权与注册

软件的加密、授权与注册流程如下：

2 本机特征信息

本机特征信息主要包括：①CPU信息、②主板序列号、③BIOS信息、④MAC地址，基于C#获取代码如下：

using System;
using System.Management;
using System.Net.NetworkInformation;
using Microsoft.Win32;namespace RWRegister
{public class Computer{public static string ComputerInfo(){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 GetBaseBoardInfo(){string info = string.Empty;info = GetHardWareInfo("Win32_BaseBoard", "SerialNumber");return info;}private static string GetBIOSInfo(){string info = string.Empty;info = GetHardWareInfo("Win32_BIOS", "SerialNumber");return info;}private static string GetMACInfo(){string info = string.Empty;info = GetMacAddressByNetwork();return info;}private static string GetHardWareInfo(string typePath, string Key){try{ManagementClass mageClass = new ManagementClass(typePath);ManagementObjectCollection mageObjectColl = mageClass.GetInstances();PropertyDataCollection Properties = mageClass.Properties;foreach (PropertyData property in Properties){if (property.Name == Key){foreach (ManagementObject mageObject in mageObjectColl){return mageObject.Properties[property.Name].Value.ToString();}}}}catch (Exception ex){throw new Exception(ex.Message);}return string.Empty;}private static string GetMacAddressByNetwork(){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 rKey = Registry.LocalMachine.OpenSubKey(fRegistryKey, false);if (rKey != null){string fPnpInstanceID = rKey.GetValue("PnpInstanceID", "").ToString();int fMediaSubType = Convert.ToInt32(rKey.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){throw new Exception(ex.Message);}return macAddress;}}
}

3 加密与解密算法

加密方法包括：①秘钥加密（KeyA+keyB）、②MD5加密。基于C#的加密与解密算法如下：

using System;
using System.Security.Cryptography;
using System.Text;
using System.IO;namespace RWRegister
{public enum CryptoKey{KeyA, KeyB}public class Encryption{private string KeyA = "Sgg***";private string KeyB = "Qing***";private string MD5strBegin = "C++***";private string MD5strEnd = "Matlab***";private string ExecuteKey = string.Empty;public Encryption(){InitKey();//KeyA}public Encryption(CryptoKey Key){InitKey(Key);//Custom}private void InitKey(CryptoKey Key = CryptoKey.KeyA){switch (Key){case CryptoKey.KeyA:ExecuteKey = KeyA;break;case CryptoKey.KeyB:ExecuteKey = KeyB;break;}}public string EncryptOfKey(string str){return Encrypt(str, ExecuteKey);}public string DecryptOfKey(string str){return Decrypt(str, ExecuteKey);}public string EncryptOfMD5(string str){str = string.Concat(MD5strBegin, str, MD5strEnd);//trimMD5 md5 = new MD5CryptoServiceProvider();byte[] fromdata = Encoding.Unicode.GetBytes(str);byte[] todata = md5.ComputeHash(fromdata);string MD5str = string.Empty;foreach (var data in todata){MD5str += data.ToString("x2");}return MD5str;}private string Encrypt(string str, string sKey){DESCryptoServiceProvider DESCsp = new DESCryptoServiceProvider();byte[] InputBytes = Encoding.Default.GetBytes(str);DESCsp.Key = ASCIIEncoding.ASCII.GetBytes(sKey);DESCsp.IV = ASCIIEncoding.ASCII.GetBytes(sKey);MemoryStream ms = new MemoryStream();CryptoStream cs = new CryptoStream(ms, DESCsp.CreateEncryptor(), CryptoStreamMode.Write);cs.Write(InputBytes, 0, InputBytes.Length);cs.FlushFinalBlock();StringBuilder builder = new StringBuilder();foreach (byte b in ms.ToArray()){builder.AppendFormat("{0:X2}", b);}builder.ToString();return builder.ToString();}private string Decrypt(string pToDecrypt, string sKey){DESCryptoServiceProvider DESCsp = new DESCryptoServiceProvider();byte[] InputBytes = new byte[pToDecrypt.Length / 2];for (int x = 0; x < pToDecrypt.Length / 2; x++){int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16));InputBytes[x] = (byte)i;}DESCsp.Key = ASCIIEncoding.ASCII.GetBytes(sKey);DESCsp.IV = ASCIIEncoding.ASCII.GetBytes(sKey);MemoryStream ms = new MemoryStream();CryptoStream cs = new CryptoStream(ms, DESCsp.CreateDecryptor(), CryptoStreamMode.Write);cs.Write(InputBytes, 0, InputBytes.Length);cs.FlushFinalBlock();return Encoding.Default.GetString(ms.ToArray());}}
}

4 软件授权检测

软件授权检测代码如下：

using System;
using System.Collections.Generic;
using System.IO;namespace RWRegister
{public class Register{public static string CryptographFile = "Cryptograph.Key";public static string LicenseFile = "license.Key";public static void WriteCryptographFile(string info){WriteFile(info, CryptographFile);}public static void WriteLicenseFile(string info){WriteFile(info, LicenseFile);}public static string ReadCryptographFile(){return ReadFile(CryptographFile);}public static string ReadLicenseFile(){return ReadFile(LicenseFile);}public static bool ExistCryptographFile(){return File.Exists(CryptographFile);}public static bool ExistLicenseFile(){return File.Exists(LicenseFile);}private static void WriteFile(string info, string fileName){try{using (StreamWriter writer = new StreamWriter(fileName, false)){writer.Write(info);writer.Close();}}catch (Exception ex){throw new Exception(ex.Message);}}private static string ReadFile(string fileName){string info = string.Empty;try{using (StreamReader reader = new StreamReader(fileName)){info = reader.ReadToEnd();reader.Close();}}catch (Exception ex){throw new Exception(ex.Message);}return info;}public static bool CheckRegister(){//MD5 Cryptograph of Computer informationstring CryptoInfo = Computer.ComputerInfo();Encryption encryptor = new Encryption(CryptoKey.KeyA);CryptoInfo = encryptor.EncryptOfKey(CryptoInfo);//KeyAstring MD5CryptoInfo = encryptor.EncryptOfMD5(CryptoInfo);//MD5//judge the exist of Cryptograph fileif (!ExistCryptographFile() || CryptoInfo != ReadCryptographFile()){WriteCryptographFile(CryptoInfo);}//judge the exist of License fileif (!ExistLicenseFile()){return false;}//MD5 Cryptograph of License filestring MD5License = ReadLicenseFile();encryptor = new Encryption(CryptoKey.KeyB);MD5License = encryptor.DecryptOfKey(MD5License);//KeyBif (MD5License == MD5CryptoInfo)//two md5 clash{return true;}else{return false;}}}
}

5 示例程序

5.1 界面设计

示例程序界面设计如下图，包括：① “文件(F)” 菜单（包含“数据”、“退出”子菜单）；② “帮助(H)” 菜单（包含“帮助文档”、“软件注册”子菜单）。软件开启时，将自动检测授权情况，若未授权仅有20秒的试用时间（20秒后将禁用软件）；若软件未授权，可按 “帮助”->“软件注册”步骤 进行授权。

5.2 模块代码

模块代码如下，包括窗体载入、软件注册等。

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 System.Threading;
using System.IO;namespace RWRegister
{public partial class softWare : Form{public static bool registerState = false;private const int trialRunTime = 20;//secondspublic softWare(){InitializeComponent();}private void softWare_Load(object sender, EventArgs e){MyTimer.Enabled = true;MyTimer.Interval = 1000;toolStripSLTime.Text = "";//软件授权检测if (Register.CheckRegister()){registerState = true;}else{softWareTrialRun();}}/// <summary>/// 试运行软件(后台线程)/// </summary>private void softWareTrialRun(){Thread threadClose = new Thread(softWareClose);threadClose.IsBackground = true;//后台threadClose.Start();}private void softWareClose(){int count = 0;while (!registerState && count < trialRunTime){if (registerState){return;}Thread.Sleep(1000);//1 seccount += 1;}if (registerState){return;}else{Environment.Exit(0);}}private void toolStripMExit_Click(object sender, EventArgs e){Environment.Exit(0);}private void toolStripMRegister_Click(object sender, EventArgs e){if (registerState){MessageBox.Show("软件已注册授权！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);return;}string fileName = string.Empty;ofdLicense.Title = "打开许可文件";ofdLicense.Filter = "许可文件(*.Key)|*.Key";if (ofdLicense.ShowDialog() == DialogResult.OK){fileName = ofdLicense.FileName;}else{return;}string localFileName = string.Concat(Environment.CurrentDirectory,Path.DirectorySeparatorChar,Register.LicenseFile);if (fileName != localFileName)File.Copy(fileName, localFileName, true);if (Register.CheckRegister()){registerState = true;MessageBox.Show("注册成功！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);}else{MessageBox.Show("许可文件非法！", "警告", MessageBoxButtons.OK, MessageBoxIcon.Warning);}}private void MyTimer_Tick(object sender, EventArgs e){toolStripSLTime.Text = "本地时间：" + DateTime.Now.ToString();//北京时间}}
}

5.3 完整代码下载

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基于C#的软件加密、授权与注册

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