[systemd-devel] WebUSB

[Poussa, Sakari]

+Balbi

On 1/9/17, 11:37 AM, "Kenneth Rohde Christiansen" <kenneth.christiansen at gmail.com<mailto:kenneth.christiansen at gmail.com>> wrote:

Adding Sakari and Babu, who might want to add a few people from our side.

Cheers
Kenneth
On Mon, Jan 9, 2017 at 10:20 AM Lars Knudsen <larsgk at gmail.com<mailto:larsgk at gmail.com>> wrote:
Hi,

I am currently looking into how we can make using WebUSB devices less painful for users on Linux.

The main purpose of WebUSB (as far as I can see) is to enable certain CDC (in particular - but not limited to) devices communicate directly with browsers visiting certain trusted sites (listed inside a binary object store - sent on initial handshake).

The spec is here: https://wicg.github.io/webusb/ (already running fine in chrome stable)
Examples:
https://www.youtube.com/watch?v=Z1Nk2hH2wFE
https://www.youtube.com/watch?v=o7wGt9RfHVA
https://twitter.com/denladeside/status/817451203076427783

I'm guessing the solution will consist of 2 parts:

1. make sure no WebUSB device is picked up by modemmanager (modemmanager task)

2. make sure that webusb devices will be somehow accessible to be used by a browser running with user permissions (current temp solution listed here: adding user to plugdev, adding 0664 permissions to device: https://developers.google.com/web/updates/2016/03/access-usb-devices-on-the-web )  (udev/systemd task).

For 2. we need to either making all webusb devices accessible or find some other way the browsers can - in a generic way - gain access.  In all cases, it's important that no USB interfaces has been pre-claimed by the system (e.g. by cdc_acm) or it should be possible for the browser to throw off the claims.

thoughts?

br
Lars


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