From 8bca5d815311f53ada13b62f5e590df40fef317e Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Wed, 13 Jul 2011 19:50:34 +0200 Subject: [PATCH] mac80211: allow driver access to TKIP RX P1K When the driver wants to pre-program the TKIP RX phase 1 key, it needs to be able to obtain it for the peer's TA. Add API to allow it to generate it. The generation uses a dummy on-stack context since it doesn't know the RX queue. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- include/net/mac80211.h | 14 ++++++++++++++ net/mac80211/tkip.c | 11 +++++++++++ 2 files changed, 25 insertions(+) diff --git a/include/net/mac80211.h b/include/net/mac80211.h index ea2c8c3..9e91b4f 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -2613,6 +2613,20 @@ static inline void ieee80211_get_tkip_p1k(struct ieee80211_key_conf *keyconf, } /** + * ieee80211_get_tkip_rx_p1k - get a TKIP phase 1 key for RX + * + * This function returns the TKIP phase 1 key for the given IV32 + * and transmitter address. + * + * @keyconf: the parameter passed with the set key + * @ta: TA that will be used with the key + * @iv32: IV32 to get the P1K for + * @p1k: a buffer to which the key will be written, as 5 u16 values + */ +void ieee80211_get_tkip_rx_p1k(struct ieee80211_key_conf *keyconf, + const u8 *ta, u32 iv32, u16 *p1k); + +/** * ieee80211_get_tkip_p2k - get a TKIP phase 2 key * * This function computes the TKIP RC4 key for the IV values diff --git a/net/mac80211/tkip.c b/net/mac80211/tkip.c index cc79e69..f49d00a 100644 --- a/net/mac80211/tkip.c +++ b/net/mac80211/tkip.c @@ -185,6 +185,17 @@ void ieee80211_get_tkip_p1k_iv(struct ieee80211_key_conf *keyconf, } EXPORT_SYMBOL(ieee80211_get_tkip_p1k_iv); +void ieee80211_get_tkip_rx_p1k(struct ieee80211_key_conf *keyconf, + const u8 *ta, u32 iv32, u16 *p1k) +{ + const u8 *tk = &keyconf->key[NL80211_TKIP_DATA_OFFSET_ENCR_KEY]; + struct tkip_ctx ctx; + + tkip_mixing_phase1(tk, &ctx, ta, iv32); + memcpy(p1k, ctx.p1k, sizeof(ctx.p1k)); +} +EXPORT_SYMBOL(ieee80211_get_tkip_rx_p1k); + void ieee80211_get_tkip_p2k(struct ieee80211_key_conf *keyconf, struct sk_buff *skb, u8 *p2k) { -- 2.7.4