mac80211: aes-cmac: switch to shash CMAC driver

Instead of open coding the CMAC algorithm in the mac80211 driver using
byte wide xors and calls into the crypto layer for each block of data,
instantiate a cmac(aes) synchronous hash and pass all the data into it
directly. This does not only simplify the code, it also allows the use
of more efficient and more secure implementations, especially on
platforms where SIMD ciphers have a considerable setup cost.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/mac80211/key.h b/net/mac80211/key.h
index 4aa20cef0859..ebdb80b85dc3 100644
--- a/net/mac80211/key.h
+++ b/net/mac80211/key.h
@@ -93,7 +93,7 @@ struct ieee80211_key {
 		} ccmp;
 		struct {
 			u8 rx_pn[IEEE80211_CMAC_PN_LEN];
-			struct crypto_cipher *tfm;
+			struct crypto_shash *tfm;
 			u32 replays; /* dot11RSNAStatsCMACReplays */
 			u32 icverrors; /* dot11RSNAStatsCMACICVErrors */
 		} aes_cmac;