Re: DPP Self Configuring a Device

On Sun, Mar 29, 2020 at 05:52:52PM +0000, Schmidt, Wystan W wrote:

> Unfortunately, the debug output with -dd is not much help in this case. See below:
> 
> RX ctrl_iface - hexdump_ascii(len=20):
>      44 50 50 5f 43 4f 4e 46 49 47 55 52 41 54 4f 52   DPP_CONFIGURATOR
>      5f 41 44 44                                                                   _ADD
> DPP: Generating a keypair
> RX ctrl_iface - hexdump_ascii(len=48):
>      44 50 50 5f 43 4f 4e 46 49 47 55 52 41 54 4f 52   DPP_CONFIGURATOR
>      5f 53 49 47 4e 20 63 6f 6e 66 3d 61 70 2d 64 70   _SIGN conf=ap-dp
>      70 20 63 6f 6e 66 69 67 75 72 61 74 6f 72 3d 31   p configurator=1
> DPP: Set configurator parameters:  conf=ap-dpp configurator=1
> wlan1: DPP: Failed to set configurator parameters
> CTRL_IFACE monitor send /tmp/wpa_ctrl_3137-77\x00
> 
> Are you able to recreate the desired output using the current snapshot with the configuration file from README-DPP?

I am, but I also now realized what's going on here after going through
the parsing function line by line.. I use a testing build
(CONFIG_TESTING_OPTIONS=y) which has a workaround for some old test
cases that depended on the behavior for the initial Configurator
implementation that had a hardcoded default SSID value. That is not
valid for normal use and the SSID needs to be specified. README-DPP has
clearly not been updated to take that into account with this
dpp_configurator_sign case while it was addressed for dpp_auth_init.

The correct command to use here is this:
dpp_configurator_sign conf=<ap-dpp|sta-dpp> configurator=<configurator-id> ssid=<SSID hexdump>

For example:
> dpp_configurator_add                            
1> dpp_configurator_sign conf=ap-dpp configurator=1 ssid=74657374
<3>DPP-CONF-RECEIVED 
...
OK

-- 
Jouni Malinen                                            PGP id EFC895FA