mac80211: expose AES-CMAC subkey calculation

Expose a function for the AES-CMAC subkey calculation
to drivers. This is the first step of the AES-CMAC
cipher key setup and may be required for CMAC hardware
offloading.

Signed-off-by: Assaf Krauss <assaf.krauss@intel.com>
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 71c2f9c2f5be..00b7204708bd 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -3223,6 +3223,19 @@ void ieee80211_get_tkip_p2k(struct ieee80211_key_conf *keyconf,
                             struct sk_buff *skb, u8 *p2k);
 
 /**
+ * ieee80211_aes_cmac_calculate_k1_k2 - calculate the AES-CMAC sub keys
+ *
+ * This function computes the two AES-CMAC sub-keys, based on the
+ * previously installed master key.
+ *
+ * @keyconf: the parameter passed with the set key
+ * @k1: a buffer to be filled with the 1st sub-key
+ * @k2: a buffer to be filled with the 2nd sub-key
+ */
+void ieee80211_aes_cmac_calculate_k1_k2(struct ieee80211_key_conf *keyconf,
+                                        u8 *k1, u8 *k2);
+
+/**
  * struct ieee80211_key_seq - key sequence counter
  *
  * @tkip: TKIP data, containing IV32 and IV16 in host byte order