mac80211: 802.11w - Use BIP (AES-128-CMAC)

Add mechanism for managing BIP keys (IGTK) and integrate BIP into the
TX/RX paths.

Signed-off-by: Jouni Malinen <j@w1.fi>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 31 insertions, 0 deletions

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 309d9189aa4..72c10691543 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -133,6 +133,9 @@ static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
         case WLAN_CIPHER_SUITE_CCMP:
                 alg = ALG_CCMP;
                 break;
+        case WLAN_CIPHER_SUITE_AES_CMAC:
+                alg = ALG_AES_CMAC;
+                break;
         default:
                 return -EINVAL;
         }
@@ -275,6 +278,17 @@ static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
                 else
                         params.cipher = WLAN_CIPHER_SUITE_WEP104;
                 break;
+        case ALG_AES_CMAC:
+                params.cipher = WLAN_CIPHER_SUITE_AES_CMAC;
+                seq[0] = key->u.aes_cmac.tx_pn[5];
+                seq[1] = key->u.aes_cmac.tx_pn[4];
+                seq[2] = key->u.aes_cmac.tx_pn[3];
+                seq[3] = key->u.aes_cmac.tx_pn[2];
+                seq[4] = key->u.aes_cmac.tx_pn[1];
+                seq[5] = key->u.aes_cmac.tx_pn[0];
+                params.seq = seq;
+                params.seq_len = 6;
+                break;
         }
 
         params.key = key->conf.key;
@@ -304,6 +318,22 @@ static int ieee80211_config_default_key(struct wiphy *wiphy,
         return 0;
 }
 
+static int ieee80211_config_default_mgmt_key(struct wiphy *wiphy,
+                                             struct net_device *dev,
+                                             u8 key_idx)
+{
+        struct ieee80211_sub_if_data *sdata;
+
+        rcu_read_lock();
+
+        sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+        ieee80211_set_default_mgmt_key(sdata, key_idx);
+
+        rcu_read_unlock();
+
+        return 0;
+}
+
 static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
 {
         struct ieee80211_sub_if_data *sdata = sta->sdata;
@@ -1153,6 +1183,7 @@ struct cfg80211_ops mac80211_config_ops = {
         .del_key = ieee80211_del_key,
         .get_key = ieee80211_get_key,
         .set_default_key = ieee80211_config_default_key,
+        .set_default_mgmt_key = ieee80211_config_default_mgmt_key,
         .add_beacon = ieee80211_add_beacon,
         .set_beacon = ieee80211_set_beacon,
         .del_beacon = ieee80211_del_beacon,