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Date: Wed, 12 Sep 2012 00:20:02 +0800
Message-ID: <CAEFj986+K6TGpR2MXteAY86vAX8D=xVrFWMAVdc9zSuiix+Ogw@mail.gmail.com> (sfid-20120911_182009_064103_D6C0573A)
Subject: Re: [PATCH] ath5k: add support of HW encryption in management frames
From: Yeoh Chun-Yeow <yeohchunyeow@gmail.com>
To: Nick Kossifidis <mickflemm@gmail.com>
Cc: Kalle Valo <kvalo@adurom.com>, Adrian Chadd <adrian@freebsd.org>,
	Jouni Malinen <j@w1.fi>,
	Johannes Berg <johannes@sipsolutions.net>,
	linux-wireless@vger.kernel.org, jirislaby@gmail.com,
	mcgrof@qca.qualcomm.com, ath5k-devel@venema.h4ckr.net
Content-Type: text/plain; charset=ISO-8859-1
Sender: linux-wireless-owner@vger.kernel.org

> To be more clear: you can tell the hw to *only* disable decryption and
> keep doing encryption.

But the question here is that during Rx, need to do SW decryption for
management frame and then HW decryption for unicast data frame for all
the frame coming from the same STA. I still not so sure how to do
that.

Jouni said that the workaround is to re-encrypt(incorrectly) received
robust unicast management frames if hwaccel for CCMP was configured
for the transmitting STA (this is to undo the incorrect decryption
done by the hardware) and then pass the encrypted frame to mac80211
for software decryption.

----
Chun-Yeow