Managing webUSB support for local and redirected USB devices

摘要

WebUSB access can be managed for local and redirected USB devices. To enable WebUSB access to a redirected USB device, the server-side agent can force the Winusb.sys function driver to be loaded on the device stack of the USB device by modifying the device's descriptors that are reported during enumeration. To enable WebUSB access to a local USB device, a hook driver can perform similar modifications during enumeration to thereby force the Winusb.sys function driver to be loaded as the function driver on the device stack. The agent or hook driver can also block WebUSB access to a USB device by removing the WebUSB platform capability descriptor during enumeration and/or by blocking requests to access the USB device that originate from a browser process.