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Diffstat (limited to 'net/mac80211/key.c')
-rw-r--r--net/mac80211/key.c79
1 files changed, 67 insertions, 12 deletions
diff --git a/net/mac80211/key.c b/net/mac80211/key.c
index 0f889b919b06..8f403c1bb908 100644
--- a/net/mac80211/key.c
+++ b/net/mac80211/key.c
@@ -6,7 +6,7 @@
* Copyright 2007-2008 Johannes Berg <johannes@sipsolutions.net>
* Copyright 2013-2014 Intel Mobile Communications GmbH
* Copyright 2015-2017 Intel Deutschland GmbH
- * Copyright 2018-2019 Intel Corporation
+ * Copyright 2018-2020 Intel Corporation
*/
#include <linux/if_ether.h>
@@ -177,6 +177,13 @@ static int ieee80211_key_enable_hw_accel(struct ieee80211_key *key)
}
}
+ /* TKIP countermeasures don't work in encap offload mode */
+ if (key->conf.cipher == WLAN_CIPHER_SUITE_TKIP &&
+ sdata->hw_80211_encap) {
+ sdata_dbg(sdata, "TKIP is not allowed in hw 80211 encap mode\n");
+ return -EINVAL;
+ }
+
ret = drv_set_key(key->local, SET_KEY, sdata,
sta ? &sta->sta : NULL, &key->conf);
@@ -210,12 +217,20 @@ static int ieee80211_key_enable_hw_accel(struct ieee80211_key *key)
case WLAN_CIPHER_SUITE_TKIP:
case WLAN_CIPHER_SUITE_CCMP:
case WLAN_CIPHER_SUITE_CCMP_256:
+ case WLAN_CIPHER_SUITE_GCMP:
+ case WLAN_CIPHER_SUITE_GCMP_256:
+ /* We cannot do software crypto of data frames with
+ * encapsulation offload enabled. However for 802.11w to
+ * function properly we need cmac/gmac keys.
+ */
+ if (sdata->hw_80211_encap)
+ return -EINVAL;
+ /* Fall through */
+
case WLAN_CIPHER_SUITE_AES_CMAC:
case WLAN_CIPHER_SUITE_BIP_CMAC_256:
case WLAN_CIPHER_SUITE_BIP_GMAC_128:
case WLAN_CIPHER_SUITE_BIP_GMAC_256:
- case WLAN_CIPHER_SUITE_GCMP:
- case WLAN_CIPHER_SUITE_GCMP_256:
/* all of these we can do in software - if driver can */
if (ret == 1)
return 0;
@@ -262,22 +277,29 @@ static void ieee80211_key_disable_hw_accel(struct ieee80211_key *key)
sta ? sta->sta.addr : bcast_addr, ret);
}
-int ieee80211_set_tx_key(struct ieee80211_key *key)
+static int _ieee80211_set_tx_key(struct ieee80211_key *key, bool force)
{
struct sta_info *sta = key->sta;
struct ieee80211_local *local = key->local;
assert_key_lock(local);
+ set_sta_flag(sta, WLAN_STA_USES_ENCRYPTION);
+
sta->ptk_idx = key->conf.keyidx;
- if (!ieee80211_hw_check(&local->hw, AMPDU_KEYBORDER_SUPPORT))
+ if (force || !ieee80211_hw_check(&local->hw, AMPDU_KEYBORDER_SUPPORT))
clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
ieee80211_check_fast_xmit(sta);
return 0;
}
+int ieee80211_set_tx_key(struct ieee80211_key *key)
+{
+ return _ieee80211_set_tx_key(key, false);
+}
+
static void ieee80211_pairwise_rekey(struct ieee80211_key *old,
struct ieee80211_key *new)
{
@@ -392,6 +414,31 @@ void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata,
mutex_unlock(&sdata->local->key_mtx);
}
+static void
+__ieee80211_set_default_beacon_key(struct ieee80211_sub_if_data *sdata, int idx)
+{
+ struct ieee80211_key *key = NULL;
+
+ assert_key_lock(sdata->local);
+
+ if (idx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS &&
+ idx < NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS +
+ NUM_DEFAULT_BEACON_KEYS)
+ key = key_mtx_dereference(sdata->local, sdata->keys[idx]);
+
+ rcu_assign_pointer(sdata->default_beacon_key, key);
+
+ ieee80211_debugfs_key_update_default(sdata);
+}
+
+void ieee80211_set_default_beacon_key(struct ieee80211_sub_if_data *sdata,
+ int idx)
+{
+ mutex_lock(&sdata->local->key_mtx);
+ __ieee80211_set_default_beacon_key(sdata, idx);
+ mutex_unlock(&sdata->local->key_mtx);
+}
+
static int ieee80211_key_replace(struct ieee80211_sub_if_data *sdata,
struct sta_info *sta,
bool pairwise,
@@ -400,7 +447,7 @@ static int ieee80211_key_replace(struct ieee80211_sub_if_data *sdata,
{
int idx;
int ret = 0;
- bool defunikey, defmultikey, defmgmtkey;
+ bool defunikey, defmultikey, defmgmtkey, defbeaconkey;
/* caller must provide at least one old/new */
if (WARN_ON(!new && !old))
@@ -441,11 +488,8 @@ static int ieee80211_key_replace(struct ieee80211_sub_if_data *sdata,
if (pairwise) {
rcu_assign_pointer(sta->ptk[idx], new);
if (new &&
- !(new->conf.flags & IEEE80211_KEY_FLAG_NO_AUTO_TX)) {
- sta->ptk_idx = idx;
- clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
- ieee80211_check_fast_xmit(sta);
- }
+ !(new->conf.flags & IEEE80211_KEY_FLAG_NO_AUTO_TX))
+ _ieee80211_set_tx_key(new, true);
} else {
rcu_assign_pointer(sta->gtk[idx], new);
}
@@ -465,6 +509,9 @@ static int ieee80211_key_replace(struct ieee80211_sub_if_data *sdata,
defmgmtkey = old &&
old == key_mtx_dereference(sdata->local,
sdata->default_mgmt_key);
+ defbeaconkey = old &&
+ old == key_mtx_dereference(sdata->local,
+ sdata->default_beacon_key);
if (defunikey && !new)
__ieee80211_set_default_key(sdata, -1, true, false);
@@ -472,6 +519,8 @@ static int ieee80211_key_replace(struct ieee80211_sub_if_data *sdata,
__ieee80211_set_default_key(sdata, -1, false, true);
if (defmgmtkey && !new)
__ieee80211_set_default_mgmt_key(sdata, -1);
+ if (defbeaconkey && !new)
+ __ieee80211_set_default_beacon_key(sdata, -1);
rcu_assign_pointer(sdata->keys[idx], new);
if (defunikey && new)
@@ -483,6 +532,9 @@ static int ieee80211_key_replace(struct ieee80211_sub_if_data *sdata,
if (defmgmtkey && new)
__ieee80211_set_default_mgmt_key(sdata,
new->conf.keyidx);
+ if (defbeaconkey && new)
+ __ieee80211_set_default_beacon_key(sdata,
+ new->conf.keyidx);
}
if (old)
@@ -500,7 +552,9 @@ ieee80211_key_alloc(u32 cipher, int idx, size_t key_len,
struct ieee80211_key *key;
int i, j, err;
- if (WARN_ON(idx < 0 || idx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS))
+ if (WARN_ON(idx < 0 ||
+ idx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS +
+ NUM_DEFAULT_BEACON_KEYS))
return ERR_PTR(-EINVAL);
key = kzalloc(sizeof(struct ieee80211_key) + key_len, GFP_KERNEL);
@@ -963,6 +1017,7 @@ static void ieee80211_free_keys_iface(struct ieee80211_sub_if_data *sdata,
sdata->crypto_tx_tailroom_pending_dec = 0;
ieee80211_debugfs_key_remove_mgmt_default(sdata);
+ ieee80211_debugfs_key_remove_beacon_default(sdata);
list_for_each_entry_safe(key, tmp, &sdata->key_list, list) {
ieee80211_key_replace(key->sdata, key->sta,
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.