Device Fingerprint

DeviceFingerprintProvider.cs

  internal static class DeviceFingerprintProvider
  {
    public static async Task<string> DeviceFingerprintAsync()
    {
      DeviceFingerprintProvider.DiskSpace diskSpace = await DeviceFingerprintProvider.GetDiskSpaceAsync();
      List<string> appNames = new List<string>();
      string fingerprintFormat = "{{\n    dfid: {{\n        \"tds\": {0},\n        \"fds\": {1},\n        \"boot_time\": {2},\n        \"apps\": {{\n                \"version\": 0,\n                \"names\": [{3}]\n                }}\n    }}\n}}";
      ulong tds = diskSpace.TotalSpace / 1024UL;
      ulong fds = diskSpace.FreeSpace / 1024UL;
      ulong bootTime = await DeviceFingerprintProvider.UnixBootTimeAsync();
      string appNamesString = appNames.Count > 0 ? "\"" + Enumerable.Aggregate<string>((IEnumerable<string>) appNames, (Func<string, string, string>) ((a, b) => a + "\", \"" + b)) + "\"" : "";
      string fingerprint = string.Format(fingerprintFormat, (object) tds, (object) fds, (object) bootTime, (object) appNamesString);
      return fingerprint;
    }

    private static async Task<DeviceFingerprintProvider.DiskSpace> GetDiskSpaceAsync()
    {
      DeviceFingerprintProvider.DiskSpace diskSpace = new DeviceFingerprintProvider.DiskSpace();
      try
      {
        foreach (DriveInfo driveInfo in DriveInfo.GetDrives())
        {
          if (driveInfo.IsReady && driveInfo.DriveType == DriveType.Fixed)
          {
            diskSpace.FreeSpace += (ulong) driveInfo.AvailableFreeSpace;
            diskSpace.TotalSpace += (ulong) driveInfo.TotalSize;
          }
        }
        bool flag;
        int num = flag ? 1 : 0;
      }
      catch (Exception ex)
      {
      }
      return diskSpace;
    }

    private static async Task<ulong> UnixBootTimeAsync()
    {
      return UnixTimestampConverter.ToUnixTime(DateTime.Now) - (ulong) Environment.TickCount / 1000UL;
    }

    private struct DiskSpace
    {
      public ulong TotalSpace;
      public ulong FreeSpace;
    }
  }