mirror of
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146 lines
4.3 KiB
Markdown
146 lines
4.3 KiB
Markdown
# sys-usb
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PCI handler of USB devices in Qubes OS.
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## Table of Contents
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* [Description](#description)
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* [Installation](#installation)
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* [Keyboard installation](#keyboard-installation)
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* [AudioVM installation](#audiovm-installation)
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* [Client installation](#client-installation)
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* [Client USB proxy installation](#client-usb-proxy-installation)
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* [Client cryptsetup installation](#client-cryptsetup-installation)
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* [Client CTAP installation](#client-ctap-installation)
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* [Access control](#access-control)
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* [Usage](#usage)
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* [How to use audio devices](#how-to-use-audio-devices)
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* [Credits](#credits)
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## Description
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Setup named disposables for USB qubes. During creation, it tries to separate
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the USB controllers to different qubes is possible.
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## Installation
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- Top:
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```sh
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sudo qubesctl top.enable sys-usb
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sudo qubesctl --targets=tpl-sys-usb state.apply
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sudo qubesctl top.disable sys-usb
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```
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- State:
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<!-- pkg:begin:post-install -->
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```sh
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sudo qubesctl state.apply sys-usb.create
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sudo qubesctl --skip-dom0 --targets=tpl-sys-usb state.apply sys-usb.install
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```
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<!-- pkg:end:post-install -->
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### Keyboard installation
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If you use an USB keyboard, also run:
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```sh
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sudo qubesctl state.apply sys-usb.keyboard
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```
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### AudioVM installation
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If you plan to use `disp-sys-usb` as an AudioVM:
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```sh
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sudo qubesctl --skip-dom0 --targets=tpl-sys-usb state.apply sys-audio.install
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sudo qubesctl --skip-dom0 --targets=dvm-sys-usb state.apply sys-audio.configure-dvm
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qvm-tags disp-sys-usb add audiovm
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qvm-features disp-sys-usb service.audiovm 1
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```
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And set the qube preference `audiovm` to `disp-sys-usb`:
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```sh
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qvm-prefs QUBE audiovm disp-sys-usb
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```
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### Client installation
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#### Client USB proxy installation
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Install the proxy on the client template:
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```sh
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sudo qubesctl --skip-dom0 --targets=tpl-QUBE state.apply sys-usb.install-client-proxy
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```
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#### Client cryptsetup installation
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If the client requires decrypting a device, install on the client template:
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```sh
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sudo qubesctl --skip-dom0 --targets=tpl-QUBE state.apply sys-usb.install-client-cryptsetup
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```
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#### Client CTAP installation
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If the client requires a CTAP device, install on the client template:
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```sh
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sudo qubesctl --skip-dom0 --targets=tpl-QUBE state.apply sys-usb.install-client-fido
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```
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And enable the CTAP Proxy service for the client qubes:
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```sh
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qvm-features QUBE service.qubes-ctap-proxy 1
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```
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## Access control
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No extra services are implemented, consult upstream to learn how to use the
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following services:
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- `qubes.InputMouse`, `qubes.InputKeyboard`, `qubes.InputTablet`;
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- `ctap.GetInfo`, `ctap.ClientPin`, `u2f.Register`, `u2f.Authenticate`,
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`policy.RegisterArgument`.
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## Usage
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Depending on you system, one or more USB qubes will be created to hold the
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different controllers. The qube names are `disp-sys-usb`, `disp-sys-usb-left`,
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`disp-sys-usb-dock`.
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Start a USB qube an connect a device to it. USB PCI devices will appear on the
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system tray icon `qui-devices`. From there, assign it to the intended qube.
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### How to use audio devices
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Bluetooth and Camera are normally integrated in laptops, but they still are
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USB devices internally. They will be held by `(disp-)sys-usb` or
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`(disp-)sys-net`, else `dom0`.
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Built-in microphones on the other hand, are directly attached to `dom0`.
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To use these devices, there are two options:
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1. Attaching the device (USB passthrough) to the audio client:
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- Advantages:
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- Easier setup as it doesn't require an AudioVM.
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- Disadvantages:
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- Increased latency;
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- Only one qube can use the device; and
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- Less secure as it exposes the Audio stack to the client.
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2. Leaving devices to the AudioVM (`(disp-)sys-usb` as AudioVM):
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- Advantages:
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- More secure as the devices are not on the client;
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- Less latency; and
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- All audio clients will have the same audio capabilities.
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- Disadvantages:
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- Some applications might not work due to not finding the device.
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3. Using [video-companion](../video-companion/README.md) to access webcam:
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- Advantages:
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- The most secure for client and server as the physical devices are
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unmanaged;
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- Least latency.
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- Disadvantages:
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- Can't use video-companion to screen share and share webcam at the
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same time; and
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- Does not cover audio.
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## Credits
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- [Unman](https://github.com/unman/shaker/blob/main/sys-usb)
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