WPS Configuration Methods

Jouni Malinen j at w1.fi
Sat Feb 25 00:44:20 PST 2017

On Wed, Feb 22, 2017 at 04:31:23PM +0000, Jose Blanquicet wrote:
> when "display" is set as config method for WPS, wpa_supplicant/hostapd
> set also "virtual_display" in order to follow WPS technical
> specifications v2.0. However, I checked them and they say for Display:
> "A dynamic 4 or 8 digit PIN is available from a display. Version 2.0
> devices shall qualify the display as Virtual (0x2008) or Physical
> (0x4008)."
> From my understood, wpa_supplicant is mainly used on desktop and
> embedded systems, in both cases the devices are mostly equipped with a
> screen/display. Isn't it more appropriated to add "physical_display"
> instead of "virtual_display"? According to the specifications:
> Virtual Display PIN: "The dynamic 4 or 8 digit PIN is displayed
> through a remote user interface. For example using the management html
> page of an AP to obtain the dynamic PIN."
> Physical Display PIN: "The dynamic 4 or 8 digit PIN is shown on a
> display/screen that is part of the device. For example obtaining the
> dynamic PIN from the LCD screen on a printer."
> What do you think?

I'd assume both cases exist and whether one of the options is more
likely than the other is subject to one's view point.. I don't see any
point in changing this behavior now. All new devices should explicitly
set physical_display or virtual_display anyway taken into account that
this specification change is already more than six years old..

Jouni Malinen                                            PGP id EFC895FA

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