From 5d0d04e477c44993f995f35b728ce9dd57a4615e Mon Sep 17 00:00:00 2001 From: Assaf Krauss Date: Wed, 1 Aug 2012 15:12:48 +0300 Subject: 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 Reviewed-by: Emmanuel Grumbach Signed-off-by: Johannes Berg --- net/mac80211/aes_cmac.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'net/mac80211') diff --git a/net/mac80211/aes_cmac.c b/net/mac80211/aes_cmac.c index a04752e..4933535 100644 --- a/net/mac80211/aes_cmac.c +++ b/net/mac80211/aes_cmac.c @@ -126,3 +126,20 @@ void ieee80211_aes_cmac_key_free(struct crypto_cipher *tfm) { crypto_free_cipher(tfm); } + +void ieee80211_aes_cmac_calculate_k1_k2(struct ieee80211_key_conf *keyconf, + u8 *k1, u8 *k2) +{ + u8 l[AES_BLOCK_SIZE] = {}; + struct ieee80211_key *key = + container_of(keyconf, struct ieee80211_key, conf); + + crypto_cipher_encrypt_one(key->u.aes_cmac.tfm, l, l); + + memcpy(k1, l, AES_BLOCK_SIZE); + gf_mulx(k1); + + memcpy(k2, k1, AES_BLOCK_SIZE); + gf_mulx(k2); +} +EXPORT_SYMBOL(ieee80211_aes_cmac_calculate_k1_k2); -- cgit v1.1