[RFC] Implementing nohwcrypt in wcn36xx

[Bob Copeland]

On Fri, Mar 28, 2014 at 10:53:44AM +0800, Chun-Yeow Yeoh wrote:
> Also, if you try the STA mode connected to an AP with nohwcrypt set to
> 1 or without, is this working?

Actually, I have been able to send (software) encrypted frames
from a STA to an AP, and decrypt them with wireshark and they look
ok.

The problem in my case is that no encrypted RX frames show up.  I
suspect this is because firmware sees the protected bit on the frame and
either drops it, or tries to decrypt it even though there is no key and
then drops the corrupt frame.  In ath9k/ath5k, the hardware will pass up
such frames.  I haven't found any setting or filter flag to receive
these frames yet.

I noticed that the header file mentioned AES-128-CMAC, which would
be great if we could use it, but trying to set these keys doesn't work
on this hw as far as I can tell:

<7>[   63.536346] wcn36xx: Key: cmd=0x0 algo:0xfac06, id:4, len:16 flags 0x0
<7>[   63.536376] wcn36xx: KEY: 00000000: 97 d8 58 04 60 c6 ab 0e 8f f4 6c 9c 90 1b 95 64
<3>[   63.537139] wcn36xx: ERROR hal_set_bsskey response failed err=6

-- 
Bob Copeland %% www.bobcopeland.com