private static void RetrieveProperties(string hash, ref PortDefinition pd, AsyncUsbStream s)
{
IDictionaryEnumerator dict;
dict = s_textProperties.GetEnumerator();
while (dict.MoveNext())
{
pd.Properties.Add(dict.Key, s.RetrieveStringFromDevice((int)dict.Value));
}
dict = s_digitProperties.GetEnumerator();
while (dict.MoveNext())
{
pd.Properties.Add(dict.Key, s.RetrieveIntegerFromDevice((int)dict.Value));
}
}
// The following procedure works with the USB device driver; upon finding all instances of USB devices
// that match the requested Guid, the procedure checks the corresponding registry keys to find the unique
// serial number to show to the user; the serial number is decided by the device driver at installation
// time and stored in a registry key whose name is the hash of the laser etched security key of the device
private static void EnumeratePorts(Guid inquiriesInterface, string driverVersion, SortedList lst)
{
IntPtr devInfo = Native.SetupDiGetClassDevs(ref inquiriesInterface, null, 0, Native.DIGCF_DEVICEINTERFACE | Native.DIGCF_PRESENT);
if (devInfo == Native.INVALID_HANDLE_VALUE)
{
return;
}
Native.SP_DEVICE_INTERFACE_DATA interfaceData = new Native.SP_DEVICE_INTERFACE_DATA(); interfaceData.cbSize = Marshal.SizeOf(interfaceData);
int index = 0;
while (Native.SetupDiEnumDeviceInterfaces(devInfo, 0, ref inquiriesInterface, index++, ref interfaceData))
{
Native.SP_DEVICE_INTERFACE_DETAIL_DATA detail = new Native.SP_DEVICE_INTERFACE_DETAIL_DATA();
// explicit size of unmanaged structure must be provided, because it does not include transfer buffer
// for whatever reason on 64 bit machines the detail size is 8 rather than 5, likewise the interfaceData.cbSize
// is 32 rather than 28 for non 64bit machines, therefore, we make the detemination of the size based
// on the interfaceData.cbSize (kind of hacky but it works).
if (interfaceData.cbSize == 32)
{
detail.cbSize = 8;
}
else
{
detail.cbSize = 5;
}
if (Native.SetupDiGetDeviceInterfaceDetail(devInfo, ref interfaceData, ref detail, Marshal.SizeOf(detail) * 2, 0, 0))
{
string port = detail.DevicePath.ToLower();
AsyncUsbStream s = null;
try
{
s = new AsyncUsbStream(port);
string displayName = s.RetrieveStringFromDevice(IOCTL_SPOTUSB_DISPLAY_NAME);
string hash = s.RetrieveStringFromDevice(IOCTL_SPOTUSB_DEVICE_HASH);
string operationalPort = s.RetrieveStringFromDevice(IOCTL_SPOTUSB_PORT_NAME);
if ((operationalPort == null) || (displayName == null) || (hash == null))
{
continue;
}
// convert kernel format to user mode format
// kernel : @"\??\USB#Vid_beef&Pid_0009#5&4162af8&0&1#{09343630-a794-10ef-334f-82ea332c49f3}"
// user : @"\\?\usb#vid_beef&pid_0009#5&4162af8&0&1#{09343630-a794-10ef-334f-82ea332c49f3}"
StringBuilder operationalPortUser = new StringBuilder();
operationalPortUser.Append(@"\\?");
operationalPortUser.Append(operationalPort.Substring(3));
PortDefinition pd = PortDefinition.CreateInstanceForUsb(displayName + "_" + hash, operationalPortUser.ToString());
RetrieveProperties(hash, ref pd, s);
lst.Add(pd.DisplayName, pd);
}
catch
{
}
finally
{
if (s != null) s.Close();
}
}
}
Native.SetupDiDestroyDeviceInfoList(devInfo);
}