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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Security.Cryptography;
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using System.IO;
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using Microsoft.Win32;
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using System.Net.NetworkInformation;
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namespace DOFTECH.License
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{
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public static class License
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{
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public static bool IsEnabled()
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{
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bool result = false;
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string path = string.Empty;
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try
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{
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RegistryKey key = Registry.LocalMachine;
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RegistryKey software = key.OpenSubKey("SOFTWARE");
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RegistryKey DOFTECH = software.OpenSubKey("DOFTECH");
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RegistryKey SPPIDConverter = DOFTECH.OpenSubKey("SPPIDConverter");
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path = SPPIDConverter.GetValue("path") + "licenses.licx";
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if (File.Exists(path))
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{
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string data = File.ReadAllText(path);
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data = Crypt.decrypt(data, "dof1073#");
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if (data.StartsWith("Date:"))
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{
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data = data.Remove(0, "Date:".Length);
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if (string.IsNullOrEmpty(data))
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{
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data = "Date:" + DateTime.Today.ToShortDateString();
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data = Crypt.encrypt(data, "dof1073#");
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File.WriteAllText(path, data);
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result = true;
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}
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else
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{
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DateTime dataTime = DateTime.MinValue;
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DateTime currentTime = DateTime.Now;
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if (DateTime.TryParse(data, out dataTime) && DateTime.Compare(dataTime.AddDays(7), currentTime) >= 0)
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result = true;
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}
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}
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else if (data.StartsWith("Absolute:"))
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{
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data = data.Remove(0, "Absolute:".Length);
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string macAddress = NetworkInterface.GetAllNetworkInterfaces()[0].GetPhysicalAddress().ToString();
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if (string.IsNullOrEmpty(data))
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{
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data = "Absolute:" + macAddress;
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data = Crypt.encrypt(data, "dof1073#");
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File.WriteAllText(path, data);
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result = true;
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}
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else if (macAddress == data)
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result = true;
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}
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}
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}
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catch (Exception ex)
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{
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}
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return result;
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}
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public static string SHA256Hash(string data)
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{
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SHA256 sha = new SHA256Managed();
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byte[] hash = sha.ComputeHash(Encoding.ASCII.GetBytes(data));
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StringBuilder stringBuilder = new StringBuilder();
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foreach (byte b in hash)
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{
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stringBuilder.AppendFormat("{0:x2}", b);
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}
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return stringBuilder.ToString();
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}
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private static void CreateDateLicenseFile()
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{
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string path = Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory) + @"\[Date]licenses.licx";
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string data = "Date:";
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using (StreamWriter sw = File.CreateText(path))
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{
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data = Crypt.encrypt(data, "dof1073#");
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sw.Write(data);
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sw.Close();
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sw.Dispose();
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}
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}
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private static void CreateAbsoluteLicenseFile()
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{
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string path = Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory) + @"\[Absolute]licenses.licx";
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string data = "Absolute:";
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using (StreamWriter sw = File.CreateText(path))
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{
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data = Crypt.encrypt(data, "dof1073#");
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sw.Write(data);
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sw.Close();
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sw.Dispose();
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}
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}
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}
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class Crypt
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{
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public static String encrypt(String text, String password)
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{
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RijndaelManaged RijndaelCipher = new RijndaelManaged();
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byte[] plainText = Encoding.UTF8.GetBytes(text);
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byte[] salt = Encoding.UTF8.GetBytes(password);
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PasswordDeriveBytes secretKey = new PasswordDeriveBytes(password, salt);
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ICryptoTransform Encryptor = RijndaelCipher.CreateEncryptor(secretKey.GetBytes(32), secretKey.GetBytes(16));
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MemoryStream memoryStream = new MemoryStream();
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CryptoStream cryptoStream = new CryptoStream(memoryStream, Encryptor, CryptoStreamMode.Write);
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cryptoStream.Write(plainText, 0, plainText.Length); // 암호화 시작
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cryptoStream.FlushFinalBlock();
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byte[] cryptBytes = memoryStream.ToArray();
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// 스트림을 닫습니다.
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memoryStream.Close();
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cryptoStream.Close();
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String cryptResult = Convert.ToBase64String(cryptBytes);
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return cryptResult; // 암호화 문자열 리턴.
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}
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public static String decrypt(String text, String password)
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{
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RijndaelManaged RijndaelCipher = new RijndaelManaged();
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byte[] encryptData = Convert.FromBase64String(text);
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byte[] salt = Encoding.UTF8.GetBytes(password);
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PasswordDeriveBytes SecretKey = new PasswordDeriveBytes(password, salt);
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ICryptoTransform Decryptor = RijndaelCipher.CreateDecryptor(SecretKey.GetBytes(32), SecretKey.GetBytes(16));
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MemoryStream memoryStream = new MemoryStream(encryptData);
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CryptoStream cryptoStream = new CryptoStream(memoryStream, Decryptor, CryptoStreamMode.Read);
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byte[] PlainText = new byte[encryptData.Length];
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// 복호화 시작
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int DecryptedCount = cryptoStream.Read(PlainText, 0, PlainText.Length);
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memoryStream.Close();
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cryptoStream.Close();
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// 복호화된 데이터를 문자열로 바꾼다.
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string DecryptedData = Encoding.UTF8.GetString(PlainText, 0, DecryptedCount);
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// 최종 결과 리턴
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return DecryptedData;
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}
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}
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}
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