USB-устройства обычно подразделяются на две категории: Hid и USB. Устройство USB может быть или не быть устройством Hid, и наоборот. Спрятать обычно немного легче, чем прямой USB. Разные платформы имеют разные API для работы с USB и Hid.
Вот документация для UWP:
USB:
https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/how-to-connect-to-a-usb-device--uwp-app-
Хид:
https://docs.microsoft.com/en-us/uwp/api/windows.devices.humaninterfacedevice
Вот документация для Android:
https://developer.xamarin.com/api/namespace/Android.Hardware.Usb/
Вот два класса для работы с USB / Hid на уровне API Windows:
https://github.com/MelbourneDeveloper/Device.Net/blob/master/src/Hid.Net/Windows/HidAPICalls.cs
public static class HidAPICalls
{
#region Constants
private const int DigcfDeviceinterface = 16;
private const int DigcfPresent = 2;
private const uint FileShareRead = 1;
private const uint FileShareWrite = 2;
private const uint GenericRead = 2147483648;
private const uint GenericWrite = 1073741824;
private const uint OpenExisting = 3;
private const int HIDP_STATUS_SUCCESS = 0x110000;
private const int HIDP_STATUS_INVALID_PREPARSED_DATA = -0x3FEF0000;
#endregion
#region API Calls
[DllImport("hid.dll", SetLastError = true)]
private static extern bool HidD_GetPreparsedData(SafeFileHandle hidDeviceObject, out IntPtr pointerToPreparsedData);
[DllImport("hid.dll", SetLastError = true, CallingConvention = CallingConvention.StdCall)]
private static extern bool HidD_GetManufacturerString(SafeFileHandle hidDeviceObject, IntPtr pointerToBuffer, uint bufferLength);
[DllImport("hid.dll", SetLastError = true, CallingConvention = CallingConvention.StdCall)]
private static extern bool HidD_GetProductString(SafeFileHandle hidDeviceObject, IntPtr pointerToBuffer, uint bufferLength);
[DllImport("hid.dll", SetLastError = true, CallingConvention = CallingConvention.StdCall)]
private static extern bool HidD_GetSerialNumberString(SafeFileHandle hidDeviceObject, IntPtr pointerToBuffer, uint bufferLength);
[DllImport("hid.dll", SetLastError = true)]
private static extern int HidP_GetCaps(IntPtr pointerToPreparsedData, out HidCollectionCapabilities hidCollectionCapabilities);
[DllImport("hid.dll", SetLastError = true)]
private static extern bool HidD_GetAttributes(SafeFileHandle hidDeviceObject, out HidAttributes attributes);
[DllImport("hid.dll", SetLastError = true)]
private static extern bool HidD_FreePreparsedData(ref IntPtr pointerToPreparsedData);
[DllImport("hid.dll", SetLastError = true)]
private static extern void HidD_GetHidGuid(ref Guid hidGuid);
private delegate bool GetString(SafeFileHandle hidDeviceObject, IntPtr pointerToBuffer, uint bufferLength);
#endregion
#region Helper Methods
#region Public Methods
public static HidAttributes GetHidAttributes(SafeFileHandle safeFileHandle)
{
var isSuccess = HidD_GetAttributes(safeFileHandle, out var hidAttributes);
WindowsDeviceBase.HandleError(isSuccess, "Could not get Hid Attributes");
return hidAttributes;
}
public static HidCollectionCapabilities GetHidCapabilities(SafeFileHandle readSafeFileHandle)
{
var isSuccess = HidD_GetPreparsedData(readSafeFileHandle, out var pointerToPreParsedData);
WindowsDeviceBase.HandleError(isSuccess, "Could not get pre parsed data");
var result = HidP_GetCaps(pointerToPreParsedData, out var hidCollectionCapabilities);
if (result != HIDP_STATUS_SUCCESS)
{
throw new Exception($"Could not get Hid capabilities. Return code: {result}");
}
isSuccess = HidD_FreePreparsedData(ref pointerToPreParsedData);
WindowsDeviceBase.HandleError(isSuccess, "Could not release handle for getting Hid capabilities");
return hidCollectionCapabilities;
}
public static string GetManufacturer(SafeFileHandle safeFileHandle)
{
return GetHidString(safeFileHandle, HidD_GetManufacturerString);
}
public static string GetProduct(SafeFileHandle safeFileHandle)
{
return GetHidString(safeFileHandle, HidD_GetProductString);
}
public static string GetSerialNumber(SafeFileHandle safeFileHandle)
{
return GetHidString(safeFileHandle, HidD_GetSerialNumberString);
}
#endregion
#region Private Static Methods
private static string GetHidString(SafeFileHandle safeFileHandle, GetString getString)
{
var pointerToBuffer = Marshal.AllocHGlobal(126);
var isSuccess = getString(safeFileHandle, pointerToBuffer, 126);
Marshal.FreeHGlobal(pointerToBuffer);
WindowsDeviceBase.HandleError(isSuccess, "Could not get Hid string");
return Marshal.PtrToStringUni(pointerToBuffer);
}
#endregion
#endregion
}
https://github.com/MelbourneDeveloper/Device.Net/blob/master/src/Usb.Net/Windows/WinUsbApiCalls.cs
public static partial class WinUsbApiCalls
{
#region Constants
public const int EnglishLanguageID = 1033;
public const uint DEVICE_SPEED = 1;
public const byte USB_ENDPOINT_DIRECTION_MASK = 0X80;
public const int WritePipeId = 0x80;
/// <summary>
/// Not sure where this constant is defined...
/// </summary>
public const int DEFAULT_DESCRIPTOR_TYPE = 0x01;
public const int USB_STRING_DESCRIPTOR_TYPE = 0x03;
#endregion
#region API Calls
[DllImport("winusb.dll", SetLastError = true)]
public static extern bool WinUsb_ControlTransfer(IntPtr InterfaceHandle, WINUSB_SETUP_PACKET SetupPacket, byte[] Buffer, uint BufferLength, ref uint LengthTransferred, IntPtr Overlapped);
[DllImport("winusb.dll", SetLastError = true, CharSet = CharSet.Auto)]
public static extern bool WinUsb_GetAssociatedInterface(SafeFileHandle InterfaceHandle, byte AssociatedInterfaceIndex, out SafeFileHandle AssociatedInterfaceHandle);
[DllImport("winusb.dll", SetLastError = true)]
public static extern bool WinUsb_GetDescriptor(SafeFileHandle InterfaceHandle, byte DescriptorType, byte Index, ushort LanguageID, out USB_DEVICE_DESCRIPTOR deviceDesc, uint BufferLength, out uint LengthTransfered);
[DllImport("winusb.dll", SetLastError = true)]
public static extern bool WinUsb_GetDescriptor(SafeFileHandle InterfaceHandle, byte DescriptorType, byte Index, UInt16 LanguageID, byte[] Buffer, UInt32 BufferLength, out UInt32 LengthTransfered);
[DllImport("winusb.dll", SetLastError = true)]
public static extern bool WinUsb_Free(SafeFileHandle InterfaceHandle);
[DllImport("winusb.dll", SetLastError = true)]
public static extern bool WinUsb_Initialize(SafeFileHandle DeviceHandle, out SafeFileHandle InterfaceHandle);
[DllImport("winusb.dll", SetLastError = true)]
public static extern bool WinUsb_QueryDeviceInformation(IntPtr InterfaceHandle, uint InformationType, ref uint BufferLength, ref byte Buffer);
[DllImport("winusb.dll", SetLastError = true)]
public static extern bool WinUsb_QueryInterfaceSettings(SafeFileHandle InterfaceHandle, byte AlternateInterfaceNumber, out USB_INTERFACE_DESCRIPTOR UsbAltInterfaceDescriptor);
[DllImport("winusb.dll", SetLastError = true)]
public static extern bool WinUsb_QueryPipe(SafeFileHandle InterfaceHandle, byte AlternateInterfaceNumber, byte PipeIndex, out WINUSB_PIPE_INFORMATION PipeInformation);
[DllImport("winusb.dll", SetLastError = true)]
public static extern bool WinUsb_ReadPipe(SafeFileHandle InterfaceHandle, byte PipeID, byte[] Buffer, uint BufferLength, out uint LengthTransferred, IntPtr Overlapped);
[DllImport("winusb.dll", SetLastError = true)]
public static extern bool WinUsb_SetPipePolicy(IntPtr InterfaceHandle, byte PipeID, uint PolicyType, uint ValueLength, ref uint Value);
[DllImport("winusb.dll", SetLastError = true)]
public static extern bool WinUsb_WritePipe(SafeFileHandle InterfaceHandle, byte PipeID, byte[] Buffer, uint BufferLength, out uint LengthTransferred, IntPtr Overlapped);
#endregion
#region Public Methods
public static string GetDescriptor(SafeFileHandle defaultInterfaceHandle, byte index, string errorMessage)
{
var buffer = new byte[256];
var isSuccess = WinUsb_GetDescriptor(defaultInterfaceHandle, USB_STRING_DESCRIPTOR_TYPE, index, EnglishLanguageID, buffer, (uint)buffer.Length, out var transfered);
WindowsDeviceBase.HandleError(isSuccess, errorMessage);
var descriptor = new string(Encoding.Unicode.GetChars(buffer, 2, (int)transfered));
return descriptor.Substring(0, descriptor.Length - 1);
}
#endregion
}
В любом из этих решений вам нужно будет либо опросить устройство с определенным интервалом, либо использовать один из собственных классов прослушивания устройства API. Тем не менее, эта библиотека размещает слой через Hid и USB на всех платформах, чтобы вы могли легко обнаруживать соединения и разъединения: https://github.com/MelbourneDeveloper/Device.Net/wiki/Device-Listener. Вот как вы бы это использовали:
internal class TrezorExample : IDisposable
{
#region Fields
//Define the types of devices to search for. This particular device can be connected to via USB, or Hid
private readonly List<FilterDeviceDefinition> _DeviceDefinitions = new List<FilterDeviceDefinition>
{
new FilterDeviceDefinition{ DeviceType= DeviceType.Hid, VendorId= 0x534C, ProductId=0x0001, Label="Trezor One Firmware 1.6.x", UsagePage=65280 },
new FilterDeviceDefinition{ DeviceType= DeviceType.Usb, VendorId= 0x534C, ProductId=0x0001, Label="Trezor One Firmware 1.6.x (Android Only)" },
new FilterDeviceDefinition{ DeviceType= DeviceType.Usb, VendorId= 0x1209, ProductId=0x53C1, Label="Trezor One Firmware 1.7.x" },
new FilterDeviceDefinition{ DeviceType= DeviceType.Usb, VendorId= 0x1209, ProductId=0x53C0, Label="Model T" }
};
#endregion
#region Events
public event EventHandler TrezorInitialized;
public event EventHandler TrezorDisconnected;
#endregion
#region Public Properties
public IDevice TrezorDevice { get; private set; }
public DeviceListener DeviceListener { get; private set; }
#endregion
#region Event Handlers
private void DevicePoller_DeviceInitialized(object sender, DeviceEventArgs e)
{
TrezorDevice = e.Device;
TrezorInitialized?.Invoke(this, new EventArgs());
}
private void DevicePoller_DeviceDisconnected(object sender, DeviceEventArgs e)
{
TrezorDevice = null;
TrezorDisconnected?.Invoke(this, new EventArgs());
}
#endregion
#region Public Methods
public void StartListening()
{
TrezorDevice?.Dispose();
DeviceListener = new DeviceListener(_DeviceDefinitions, 3000);
DeviceListener.DeviceDisconnected += DevicePoller_DeviceDisconnected;
DeviceListener.DeviceInitialized += DevicePoller_DeviceInitialized;
}
public async Task InitializeTrezorAsync()
{
//Get the first available device and connect to it
var devices = await DeviceManager.Current.GetDevices(_DeviceDefinitions);
TrezorDevice = devices.FirstOrDefault();
await TrezorDevice.InitializeAsync();
}
public async Task<byte[]> WriteAndReadFromDeviceAsync()
{
//Create a buffer with 3 bytes (initialize)
var writeBuffer = new byte[64];
writeBuffer[0] = 0x3f;
writeBuffer[1] = 0x23;
writeBuffer[2] = 0x23;
//Write the data to the device
return await TrezorDevice.WriteAndReadAsync(writeBuffer);
}
public void Dispose()
{
TrezorDevice?.Dispose();
}
#endregion
}