Hi Emil,

On 10/6/22 08:22, Emil Velikov wrote:
> Greetings team,
> 
> Recently we've noticed that IWD fails to connect to WPA2-PSK networks
> whenever GCMP+CCMP cipher is used. Browsing through the IWD code-base
> it appears that it lacks support for GCMP, GCMP-256 and CCMP-256
> amongst others.

We do not support or select GCMP.  But I'm not sure why this would prevent a 
connection?  We would always select CCMP instead.  See wiphy_select_cipher().

Hmm... maybe we reject GCMP at a lower layer...?  Try the attached patch?

> 
> Was my analysis correct - is GCMP supported? Are there any plans on doing so?

No real plans, patches are always welcome.

> 
> Somewhat relatedly - is there a configuration knob that one can switch
> and let IWD fall-back to the other supported ciphers? In the GCMP+CCMP
> case, we can opt for CCMP for example.
> 

This should already happen.

Regards,
-Denis