mac80211: 802.11w - WEXT configuration for IGTK

Added new SIOCSIWENCODEEXT algorithm for configuring BIP (AES-CMAC)
keys (IGTK).

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

diff --git a/include/linux/wireless.h b/include/linux/wireless.h
index d426dce47e7c5c71fa1e67fbc0fd87de1f82e1d2..5d1f3fbffd779462d6429e01f29c43e053f96b27 100644 (file)
--- a/include/linux/wireless.h
+++ b/include/linux/wireless.h
@@ -615,6 +615,7 @@
 #define IW_ENCODE_ALG_TKIP     2
 #define IW_ENCODE_ALG_CCMP     3
 #define IW_ENCODE_ALG_PMK      4
+#define IW_ENCODE_ALG_AES_CMAC 5
 /* struct iw_encode_ext ->ext_flags */
 #define IW_ENCODE_EXT_TX_SEQ_VALID     0x00000001
 #define IW_ENCODE_EXT_RX_SEQ_VALID     0x00000002

diff --git a/net/mac80211/wext.c b/net/mac80211/wext.c
index c3b2dd5706fb905711d91f3731f274e15ab53e00..7ba1d5ba3afad51de656887cf0aa35cc31c167b8 100644 (file)
--- a/net/mac80211/wext.c
+++ b/net/mac80211/wext.c
@@ -37,7 +37,14 @@ static int ieee80211_set_encryption(struct ieee80211_sub_if_data *sdata, u8 *sta
        struct ieee80211_key *key;
        int err;
 
-       if (idx < 0 || idx >= NUM_DEFAULT_KEYS) {
+       if (alg == ALG_AES_CMAC) {
+               if (idx < NUM_DEFAULT_KEYS ||
+                   idx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS) {
+                       printk(KERN_DEBUG "%s: set_encrypt - invalid idx=%d "
+                              "(BIP)\n", sdata->dev->name, idx);
+                       return -EINVAL;
+               }
+       } else if (idx < 0 || idx >= NUM_DEFAULT_KEYS) {
                printk(KERN_DEBUG "%s: set_encrypt - invalid idx=%d\n",
                       sdata->dev->name, idx);
                return -EINVAL;
@@ -103,6 +110,9 @@ static int ieee80211_set_encryption(struct ieee80211_sub_if_data *sdata, u8 *sta
 
                if (set_tx_key || (!sta && !sdata->default_key && key))
                        ieee80211_set_default_key(sdata, idx);
+               if (alg == ALG_AES_CMAC &&
+                   (set_tx_key || (!sta && !sdata->default_mgmt_key && key)))
+                       ieee80211_set_default_mgmt_key(sdata, idx);
        }
 
  out_unlock:
@@ -1048,6 +1058,9 @@ static int ieee80211_ioctl_siwencodeext(struct net_device *dev,
        case IW_ENCODE_ALG_CCMP:
                alg = ALG_CCMP;
                break;
+       case IW_ENCODE_ALG_AES_CMAC:
+               alg = ALG_AES_CMAC;
+               break;
        default:
                return -EOPNOTSUPP;
        }
@@ -1056,20 +1069,41 @@ static int ieee80211_ioctl_siwencodeext(struct net_device *dev,
                remove = 1;
 
        idx = erq->flags & IW_ENCODE_INDEX;
-       if (idx < 1 || idx > 4) {
-               idx = -1;
-               if (!sdata->default_key)
-                       idx = 0;
-               else for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
-                       if (sdata->default_key == sdata->keys[i]) {
-                               idx = i;
-                               break;
+       if (alg == ALG_AES_CMAC) {
+               if (idx < NUM_DEFAULT_KEYS + 1 ||
+                   idx > NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS) {
+                       idx = -1;
+                       if (!sdata->default_mgmt_key)
+                               idx = 0;
+                       else for (i = NUM_DEFAULT_KEYS;
+                                 i < NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS;
+                                 i++) {
+                               if (sdata->default_mgmt_key == sdata->keys[i])
+                               {
+                                       idx = i;
+                                       break;
+                               }
                        }
-               }
-               if (idx < 0)
-                       return -EINVAL;
-       } else
-               idx--;
+                       if (idx < 0)
+                               return -EINVAL;
+               } else
+                       idx--;
+       } else {
+               if (idx < 1 || idx > 4) {
+                       idx = -1;
+                       if (!sdata->default_key)
+                               idx = 0;
+                       else for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
+                               if (sdata->default_key == sdata->keys[i]) {
+                                       idx = i;
+                                       break;
+                               }
+                       }
+                       if (idx < 0)
+                               return -EINVAL;
+               } else
+                       idx--;
+       }
 
        return ieee80211_set_encryption(sdata, ext->addr.sa_data, idx, alg,
                                        remove,