1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright 2002-2005, Instant802 Networks, Inc.
4 * Copyright 2005-2006, Devicescape Software, Inc.
5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * Copyright 2007-2008 Johannes Berg <johannes@sipsolutions.net>
7 * Copyright 2013-2014 Intel Mobile Communications GmbH
8 * Copyright 2015-2017 Intel Deutschland GmbH
9 * Copyright 2018-2020, 2022-2023 Intel Corporation
12 #include <crypto/utils.h>
13 #include <linux/if_ether.h>
14 #include <linux/etherdevice.h>
15 #include <linux/list.h>
16 #include <linux/rcupdate.h>
17 #include <linux/rtnetlink.h>
18 #include <linux/slab.h>
19 #include <linux/export.h>
20 #include <net/mac80211.h>
21 #include <asm/unaligned.h>
22 #include "ieee80211_i.h"
23 #include "driver-ops.h"
24 #include "debugfs_key.h"
32 * DOC: Key handling basics
34 * Key handling in mac80211 is done based on per-interface (sub_if_data)
35 * keys and per-station keys. Since each station belongs to an interface,
36 * each station key also belongs to that interface.
38 * Hardware acceleration is done on a best-effort basis for algorithms
39 * that are implemented in software, for each key the hardware is asked
40 * to enable that key for offloading but if it cannot do that the key is
41 * simply kept for software encryption (unless it is for an algorithm
42 * that isn't implemented in software).
43 * There is currently no way of knowing whether a key is handled in SW
44 * or HW except by looking into debugfs.
46 * All key management is internally protected by a mutex. Within all
47 * other parts of mac80211, key references are, just as STA structure
48 * references, protected by RCU. Note, however, that some things are
49 * unprotected, namely the key->sta dereferences within the hardware
50 * acceleration functions. This means that sta_info_destroy() must
51 * remove the key which waits for an RCU grace period.
54 static const u8 bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
57 update_vlan_tailroom_need_count(struct ieee80211_sub_if_data *sdata, int delta)
59 struct ieee80211_sub_if_data *vlan;
61 if (sdata->vif.type != NL80211_IFTYPE_AP)
64 /* crypto_tx_tailroom_needed_cnt is protected by this */
65 lockdep_assert_wiphy(sdata->local->hw.wiphy);
69 list_for_each_entry_rcu(vlan, &sdata->u.ap.vlans, u.vlan.list)
70 vlan->crypto_tx_tailroom_needed_cnt += delta;
75 static void increment_tailroom_need_count(struct ieee80211_sub_if_data *sdata)
78 * When this count is zero, SKB resizing for allocating tailroom
79 * for IV or MMIC is skipped. But, this check has created two race
80 * cases in xmit path while transiting from zero count to one:
82 * 1. SKB resize was skipped because no key was added but just before
83 * the xmit key is added and SW encryption kicks off.
85 * 2. SKB resize was skipped because all the keys were hw planted but
86 * just before xmit one of the key is deleted and SW encryption kicks
89 * In both the above case SW encryption will find not enough space for
90 * tailroom and exits with WARN_ON. (See WARN_ONs at wpa.c)
92 * Solution has been explained at
93 * http://mid.gmane.org/1308590980.4322.19.camel@jlt3.sipsolutions.net
96 lockdep_assert_wiphy(sdata->local->hw.wiphy);
98 update_vlan_tailroom_need_count(sdata, 1);
100 if (!sdata->crypto_tx_tailroom_needed_cnt++) {
102 * Flush all XMIT packets currently using HW encryption or no
103 * encryption at all if the count transition is from 0 -> 1.
109 static void decrease_tailroom_need_count(struct ieee80211_sub_if_data *sdata,
112 lockdep_assert_wiphy(sdata->local->hw.wiphy);
114 WARN_ON_ONCE(sdata->crypto_tx_tailroom_needed_cnt < delta);
116 update_vlan_tailroom_need_count(sdata, -delta);
117 sdata->crypto_tx_tailroom_needed_cnt -= delta;
120 static int ieee80211_key_enable_hw_accel(struct ieee80211_key *key)
122 struct ieee80211_sub_if_data *sdata = key->sdata;
123 struct sta_info *sta;
124 int ret = -EOPNOTSUPP;
127 lockdep_assert_wiphy(key->local->hw.wiphy);
129 if (key->flags & KEY_FLAG_TAINTED) {
130 /* If we get here, it's during resume and the key is
131 * tainted so shouldn't be used/programmed any more.
132 * However, its flags may still indicate that it was
133 * programmed into the device (since we're in resume)
134 * so clear that flag now to avoid trying to remove
137 if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
138 !(key->conf.flags & (IEEE80211_KEY_FLAG_GENERATE_MMIC |
139 IEEE80211_KEY_FLAG_PUT_MIC_SPACE |
140 IEEE80211_KEY_FLAG_RESERVE_TAILROOM)))
141 increment_tailroom_need_count(sdata);
143 key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE;
147 if (!key->local->ops->set_key)
148 goto out_unsupported;
153 * If this is a per-STA GTK, check if it
154 * is supported; if not, return.
156 if (sta && !(key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE) &&
157 !ieee80211_hw_check(&key->local->hw, SUPPORTS_PER_STA_GTK))
158 goto out_unsupported;
160 if (sta && !sta->uploaded)
161 goto out_unsupported;
163 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
165 * The driver doesn't know anything about VLAN interfaces.
166 * Hence, don't send GTKs for VLAN interfaces to the driver.
168 if (!(key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
170 goto out_unsupported;
174 if (key->conf.link_id >= 0 && sdata->vif.active_links &&
175 !(sdata->vif.active_links & BIT(key->conf.link_id)))
178 ret = drv_set_key(key->local, SET_KEY, sdata,
179 sta ? &sta->sta : NULL, &key->conf);
182 key->flags |= KEY_FLAG_UPLOADED_TO_HARDWARE;
184 if (!(key->conf.flags & (IEEE80211_KEY_FLAG_GENERATE_MMIC |
185 IEEE80211_KEY_FLAG_PUT_MIC_SPACE |
186 IEEE80211_KEY_FLAG_RESERVE_TAILROOM)))
187 decrease_tailroom_need_count(sdata, 1);
189 WARN_ON((key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE) &&
190 (key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV));
192 WARN_ON((key->conf.flags & IEEE80211_KEY_FLAG_PUT_MIC_SPACE) &&
193 (key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC));
198 if (ret != -ENOSPC && ret != -EOPNOTSUPP && ret != 1)
200 "failed to set key (%d, %pM) to hardware (%d)\n",
202 sta ? sta->sta.addr : bcast_addr, ret);
205 switch (key->conf.cipher) {
206 case WLAN_CIPHER_SUITE_WEP40:
207 case WLAN_CIPHER_SUITE_WEP104:
208 case WLAN_CIPHER_SUITE_TKIP:
209 case WLAN_CIPHER_SUITE_CCMP:
210 case WLAN_CIPHER_SUITE_CCMP_256:
211 case WLAN_CIPHER_SUITE_GCMP:
212 case WLAN_CIPHER_SUITE_GCMP_256:
213 case WLAN_CIPHER_SUITE_AES_CMAC:
214 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
215 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
216 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
217 /* all of these we can do in software - if driver can */
220 if (ieee80211_hw_check(&key->local->hw, SW_CRYPTO_CONTROL))
228 static void ieee80211_key_disable_hw_accel(struct ieee80211_key *key)
230 struct ieee80211_sub_if_data *sdata;
231 struct sta_info *sta;
236 if (!key || !key->local->ops->set_key)
239 if (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
245 lockdep_assert_wiphy(key->local->hw.wiphy);
247 if (key->conf.link_id >= 0 && sdata->vif.active_links &&
248 !(sdata->vif.active_links & BIT(key->conf.link_id)))
251 if (!(key->conf.flags & (IEEE80211_KEY_FLAG_GENERATE_MMIC |
252 IEEE80211_KEY_FLAG_PUT_MIC_SPACE |
253 IEEE80211_KEY_FLAG_RESERVE_TAILROOM)))
254 increment_tailroom_need_count(sdata);
256 key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE;
257 ret = drv_set_key(key->local, DISABLE_KEY, sdata,
258 sta ? &sta->sta : NULL, &key->conf);
262 "failed to remove key (%d, %pM) from hardware (%d)\n",
264 sta ? sta->sta.addr : bcast_addr, ret);
267 static int _ieee80211_set_tx_key(struct ieee80211_key *key, bool force)
269 struct sta_info *sta = key->sta;
270 struct ieee80211_local *local = key->local;
272 lockdep_assert_wiphy(local->hw.wiphy);
274 set_sta_flag(sta, WLAN_STA_USES_ENCRYPTION);
276 sta->ptk_idx = key->conf.keyidx;
278 if (force || !ieee80211_hw_check(&local->hw, AMPDU_KEYBORDER_SUPPORT))
279 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
280 ieee80211_check_fast_xmit(sta);
285 int ieee80211_set_tx_key(struct ieee80211_key *key)
287 return _ieee80211_set_tx_key(key, false);
290 static void ieee80211_pairwise_rekey(struct ieee80211_key *old,
291 struct ieee80211_key *new)
293 struct ieee80211_local *local = new->local;
294 struct sta_info *sta = new->sta;
297 lockdep_assert_wiphy(local->hw.wiphy);
299 if (new->conf.flags & IEEE80211_KEY_FLAG_NO_AUTO_TX) {
300 /* Extended Key ID key install, initial one or rekey */
302 if (sta->ptk_idx != INVALID_PTK_KEYIDX &&
303 !ieee80211_hw_check(&local->hw, AMPDU_KEYBORDER_SUPPORT)) {
304 /* Aggregation Sessions with Extended Key ID must not
305 * mix MPDUs with different keyIDs within one A-MPDU.
306 * Tear down running Tx aggregation sessions and block
307 * new Rx/Tx aggregation requests during rekey to
308 * ensure there are no A-MPDUs when the driver is not
309 * supporting A-MPDU key borders. (Blocking Tx only
310 * would be sufficient but WLAN_STA_BLOCK_BA gets the
311 * job done for the few ms we need it.)
313 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
314 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
315 __ieee80211_stop_tx_ba_session(sta, i,
316 AGG_STOP_LOCAL_REQUEST);
319 /* Rekey without Extended Key ID.
320 * Aggregation sessions are OK when running on SW crypto.
321 * A broken remote STA may cause issues not observed with HW
324 if (!(old->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
327 /* Stop Tx till we are on the new key */
328 old->flags |= KEY_FLAG_TAINTED;
329 ieee80211_clear_fast_xmit(sta);
330 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) {
331 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
332 ieee80211_sta_tear_down_BA_sessions(sta,
333 AGG_STOP_LOCAL_REQUEST);
335 if (!wiphy_ext_feature_isset(local->hw.wiphy,
336 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0)) {
337 pr_warn_ratelimited("Rekeying PTK for STA %pM but driver can't safely do that.",
339 /* Flushing the driver queues *may* help prevent
340 * the clear text leaks and freezes.
342 ieee80211_flush_queues(local, old->sdata, false);
347 static void __ieee80211_set_default_key(struct ieee80211_link_data *link,
348 int idx, bool uni, bool multi)
350 struct ieee80211_sub_if_data *sdata = link->sdata;
351 struct ieee80211_key *key = NULL;
353 lockdep_assert_wiphy(sdata->local->hw.wiphy);
355 if (idx >= 0 && idx < NUM_DEFAULT_KEYS) {
356 key = wiphy_dereference(sdata->local->hw.wiphy,
359 key = wiphy_dereference(sdata->local->hw.wiphy,
364 rcu_assign_pointer(sdata->default_unicast_key, key);
365 ieee80211_check_fast_xmit_iface(sdata);
366 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
367 drv_set_default_unicast_key(sdata->local, sdata, idx);
371 rcu_assign_pointer(link->default_multicast_key, key);
373 ieee80211_debugfs_key_update_default(sdata);
376 void ieee80211_set_default_key(struct ieee80211_link_data *link, int idx,
377 bool uni, bool multi)
379 lockdep_assert_wiphy(link->sdata->local->hw.wiphy);
381 __ieee80211_set_default_key(link, idx, uni, multi);
385 __ieee80211_set_default_mgmt_key(struct ieee80211_link_data *link, int idx)
387 struct ieee80211_sub_if_data *sdata = link->sdata;
388 struct ieee80211_key *key = NULL;
390 lockdep_assert_wiphy(sdata->local->hw.wiphy);
392 if (idx >= NUM_DEFAULT_KEYS &&
393 idx < NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS)
394 key = wiphy_dereference(sdata->local->hw.wiphy,
397 rcu_assign_pointer(link->default_mgmt_key, key);
399 ieee80211_debugfs_key_update_default(sdata);
402 void ieee80211_set_default_mgmt_key(struct ieee80211_link_data *link,
405 lockdep_assert_wiphy(link->sdata->local->hw.wiphy);
407 __ieee80211_set_default_mgmt_key(link, idx);
411 __ieee80211_set_default_beacon_key(struct ieee80211_link_data *link, int idx)
413 struct ieee80211_sub_if_data *sdata = link->sdata;
414 struct ieee80211_key *key = NULL;
416 lockdep_assert_wiphy(sdata->local->hw.wiphy);
418 if (idx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS &&
419 idx < NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS +
420 NUM_DEFAULT_BEACON_KEYS)
421 key = wiphy_dereference(sdata->local->hw.wiphy,
424 rcu_assign_pointer(link->default_beacon_key, key);
426 ieee80211_debugfs_key_update_default(sdata);
429 void ieee80211_set_default_beacon_key(struct ieee80211_link_data *link,
432 lockdep_assert_wiphy(link->sdata->local->hw.wiphy);
434 __ieee80211_set_default_beacon_key(link, idx);
437 static int ieee80211_key_replace(struct ieee80211_sub_if_data *sdata,
438 struct ieee80211_link_data *link,
439 struct sta_info *sta,
441 struct ieee80211_key *old,
442 struct ieee80211_key *new)
444 struct link_sta_info *link_sta = sta ? &sta->deflink : NULL;
448 bool defunikey, defmultikey, defmgmtkey, defbeaconkey;
451 lockdep_assert_wiphy(sdata->local->hw.wiphy);
453 /* caller must provide at least one old/new */
454 if (WARN_ON(!new && !old))
458 idx = new->conf.keyidx;
459 is_wep = new->conf.cipher == WLAN_CIPHER_SUITE_WEP40 ||
460 new->conf.cipher == WLAN_CIPHER_SUITE_WEP104;
461 link_id = new->conf.link_id;
463 idx = old->conf.keyidx;
464 is_wep = old->conf.cipher == WLAN_CIPHER_SUITE_WEP40 ||
465 old->conf.cipher == WLAN_CIPHER_SUITE_WEP104;
466 link_id = old->conf.link_id;
469 if (WARN(old && old->conf.link_id != link_id,
470 "old link ID %d doesn't match new link ID %d\n",
471 old->conf.link_id, link_id))
476 link = sdata_dereference(sdata->link[link_id], sdata);
482 link_sta = rcu_dereference_protected(sta->link[link_id],
483 lockdep_is_held(&sta->local->hw.wiphy->mtx));
488 link = &sdata->deflink;
491 if ((is_wep || pairwise) && idx >= NUM_DEFAULT_KEYS)
494 WARN_ON(new && old && new->conf.keyidx != old->conf.keyidx);
496 if (new && sta && pairwise) {
497 /* Unicast rekey needs special handling. With Extended Key ID
498 * old is still NULL for the first rekey.
500 ieee80211_pairwise_rekey(old, new);
504 if (old->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) {
505 ieee80211_key_disable_hw_accel(old);
508 ret = ieee80211_key_enable_hw_accel(new);
511 if (!new->local->wowlan)
512 ret = ieee80211_key_enable_hw_accel(new);
514 new->flags |= KEY_FLAG_UPLOADED_TO_HARDWARE;
521 list_add_tail_rcu(&new->list, &sdata->key_list);
525 rcu_assign_pointer(sta->ptk[idx], new);
527 !(new->conf.flags & IEEE80211_KEY_FLAG_NO_AUTO_TX))
528 _ieee80211_set_tx_key(new, true);
530 rcu_assign_pointer(link_sta->gtk[idx], new);
532 /* Only needed for transition from no key -> key.
533 * Still triggers unnecessary when using Extended Key ID
534 * and installing the second key ID the first time.
537 ieee80211_check_fast_rx(sta);
540 old == wiphy_dereference(sdata->local->hw.wiphy,
541 sdata->default_unicast_key);
543 old == wiphy_dereference(sdata->local->hw.wiphy,
544 link->default_multicast_key);
546 old == wiphy_dereference(sdata->local->hw.wiphy,
547 link->default_mgmt_key);
548 defbeaconkey = old &&
549 old == wiphy_dereference(sdata->local->hw.wiphy,
550 link->default_beacon_key);
552 if (defunikey && !new)
553 __ieee80211_set_default_key(link, -1, true, false);
554 if (defmultikey && !new)
555 __ieee80211_set_default_key(link, -1, false, true);
556 if (defmgmtkey && !new)
557 __ieee80211_set_default_mgmt_key(link, -1);
558 if (defbeaconkey && !new)
559 __ieee80211_set_default_beacon_key(link, -1);
561 if (is_wep || pairwise)
562 rcu_assign_pointer(sdata->keys[idx], new);
564 rcu_assign_pointer(link->gtk[idx], new);
566 if (defunikey && new)
567 __ieee80211_set_default_key(link, new->conf.keyidx,
569 if (defmultikey && new)
570 __ieee80211_set_default_key(link, new->conf.keyidx,
572 if (defmgmtkey && new)
573 __ieee80211_set_default_mgmt_key(link,
575 if (defbeaconkey && new)
576 __ieee80211_set_default_beacon_key(link,
581 list_del_rcu(&old->list);
586 struct ieee80211_key *
587 ieee80211_key_alloc(u32 cipher, int idx, size_t key_len,
589 size_t seq_len, const u8 *seq)
591 struct ieee80211_key *key;
594 if (WARN_ON(idx < 0 ||
595 idx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS +
596 NUM_DEFAULT_BEACON_KEYS))
597 return ERR_PTR(-EINVAL);
599 key = kzalloc(sizeof(struct ieee80211_key) + key_len, GFP_KERNEL);
601 return ERR_PTR(-ENOMEM);
604 * Default to software encryption; we'll later upload the
605 * key to the hardware if possible.
610 key->conf.link_id = -1;
611 key->conf.cipher = cipher;
612 key->conf.keyidx = idx;
613 key->conf.keylen = key_len;
615 case WLAN_CIPHER_SUITE_WEP40:
616 case WLAN_CIPHER_SUITE_WEP104:
617 key->conf.iv_len = IEEE80211_WEP_IV_LEN;
618 key->conf.icv_len = IEEE80211_WEP_ICV_LEN;
620 case WLAN_CIPHER_SUITE_TKIP:
621 key->conf.iv_len = IEEE80211_TKIP_IV_LEN;
622 key->conf.icv_len = IEEE80211_TKIP_ICV_LEN;
624 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
625 key->u.tkip.rx[i].iv32 =
626 get_unaligned_le32(&seq[2]);
627 key->u.tkip.rx[i].iv16 =
628 get_unaligned_le16(seq);
631 spin_lock_init(&key->u.tkip.txlock);
633 case WLAN_CIPHER_SUITE_CCMP:
634 key->conf.iv_len = IEEE80211_CCMP_HDR_LEN;
635 key->conf.icv_len = IEEE80211_CCMP_MIC_LEN;
637 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++)
638 for (j = 0; j < IEEE80211_CCMP_PN_LEN; j++)
639 key->u.ccmp.rx_pn[i][j] =
640 seq[IEEE80211_CCMP_PN_LEN - j - 1];
643 * Initialize AES key state here as an optimization so that
644 * it does not need to be initialized for every packet.
646 key->u.ccmp.tfm = ieee80211_aes_key_setup_encrypt(
647 key_data, key_len, IEEE80211_CCMP_MIC_LEN);
648 if (IS_ERR(key->u.ccmp.tfm)) {
649 err = PTR_ERR(key->u.ccmp.tfm);
654 case WLAN_CIPHER_SUITE_CCMP_256:
655 key->conf.iv_len = IEEE80211_CCMP_256_HDR_LEN;
656 key->conf.icv_len = IEEE80211_CCMP_256_MIC_LEN;
657 for (i = 0; seq && i < IEEE80211_NUM_TIDS + 1; i++)
658 for (j = 0; j < IEEE80211_CCMP_256_PN_LEN; j++)
659 key->u.ccmp.rx_pn[i][j] =
660 seq[IEEE80211_CCMP_256_PN_LEN - j - 1];
661 /* Initialize AES key state here as an optimization so that
662 * it does not need to be initialized for every packet.
664 key->u.ccmp.tfm = ieee80211_aes_key_setup_encrypt(
665 key_data, key_len, IEEE80211_CCMP_256_MIC_LEN);
666 if (IS_ERR(key->u.ccmp.tfm)) {
667 err = PTR_ERR(key->u.ccmp.tfm);
672 case WLAN_CIPHER_SUITE_AES_CMAC:
673 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
674 key->conf.iv_len = 0;
675 if (cipher == WLAN_CIPHER_SUITE_AES_CMAC)
676 key->conf.icv_len = sizeof(struct ieee80211_mmie);
678 key->conf.icv_len = sizeof(struct ieee80211_mmie_16);
680 for (j = 0; j < IEEE80211_CMAC_PN_LEN; j++)
681 key->u.aes_cmac.rx_pn[j] =
682 seq[IEEE80211_CMAC_PN_LEN - j - 1];
684 * Initialize AES key state here as an optimization so that
685 * it does not need to be initialized for every packet.
687 key->u.aes_cmac.tfm =
688 ieee80211_aes_cmac_key_setup(key_data, key_len);
689 if (IS_ERR(key->u.aes_cmac.tfm)) {
690 err = PTR_ERR(key->u.aes_cmac.tfm);
695 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
696 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
697 key->conf.iv_len = 0;
698 key->conf.icv_len = sizeof(struct ieee80211_mmie_16);
700 for (j = 0; j < IEEE80211_GMAC_PN_LEN; j++)
701 key->u.aes_gmac.rx_pn[j] =
702 seq[IEEE80211_GMAC_PN_LEN - j - 1];
703 /* Initialize AES key state here as an optimization so that
704 * it does not need to be initialized for every packet.
706 key->u.aes_gmac.tfm =
707 ieee80211_aes_gmac_key_setup(key_data, key_len);
708 if (IS_ERR(key->u.aes_gmac.tfm)) {
709 err = PTR_ERR(key->u.aes_gmac.tfm);
714 case WLAN_CIPHER_SUITE_GCMP:
715 case WLAN_CIPHER_SUITE_GCMP_256:
716 key->conf.iv_len = IEEE80211_GCMP_HDR_LEN;
717 key->conf.icv_len = IEEE80211_GCMP_MIC_LEN;
718 for (i = 0; seq && i < IEEE80211_NUM_TIDS + 1; i++)
719 for (j = 0; j < IEEE80211_GCMP_PN_LEN; j++)
720 key->u.gcmp.rx_pn[i][j] =
721 seq[IEEE80211_GCMP_PN_LEN - j - 1];
722 /* Initialize AES key state here as an optimization so that
723 * it does not need to be initialized for every packet.
725 key->u.gcmp.tfm = ieee80211_aes_gcm_key_setup_encrypt(key_data,
727 if (IS_ERR(key->u.gcmp.tfm)) {
728 err = PTR_ERR(key->u.gcmp.tfm);
734 memcpy(key->conf.key, key_data, key_len);
735 INIT_LIST_HEAD(&key->list);
740 static void ieee80211_key_free_common(struct ieee80211_key *key)
742 switch (key->conf.cipher) {
743 case WLAN_CIPHER_SUITE_CCMP:
744 case WLAN_CIPHER_SUITE_CCMP_256:
745 ieee80211_aes_key_free(key->u.ccmp.tfm);
747 case WLAN_CIPHER_SUITE_AES_CMAC:
748 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
749 ieee80211_aes_cmac_key_free(key->u.aes_cmac.tfm);
751 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
752 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
753 ieee80211_aes_gmac_key_free(key->u.aes_gmac.tfm);
755 case WLAN_CIPHER_SUITE_GCMP:
756 case WLAN_CIPHER_SUITE_GCMP_256:
757 ieee80211_aes_gcm_key_free(key->u.gcmp.tfm);
760 kfree_sensitive(key);
763 static void __ieee80211_key_destroy(struct ieee80211_key *key,
767 struct ieee80211_sub_if_data *sdata = key->sdata;
769 ieee80211_debugfs_key_remove(key);
771 if (delay_tailroom) {
772 /* see ieee80211_delayed_tailroom_dec */
773 sdata->crypto_tx_tailroom_pending_dec++;
774 wiphy_delayed_work_queue(sdata->local->hw.wiphy,
775 &sdata->dec_tailroom_needed_wk,
778 decrease_tailroom_need_count(sdata, 1);
782 ieee80211_key_free_common(key);
785 static void ieee80211_key_destroy(struct ieee80211_key *key,
792 * Synchronize so the TX path and rcu key iterators
793 * can no longer be using this key before we free/remove it.
797 __ieee80211_key_destroy(key, delay_tailroom);
800 void ieee80211_key_free_unused(struct ieee80211_key *key)
805 WARN_ON(key->sdata || key->local);
806 ieee80211_key_free_common(key);
809 static bool ieee80211_key_identical(struct ieee80211_sub_if_data *sdata,
810 struct ieee80211_key *old,
811 struct ieee80211_key *new)
813 u8 tkip_old[WLAN_KEY_LEN_TKIP], tkip_new[WLAN_KEY_LEN_TKIP];
816 if (!old || new->conf.keylen != old->conf.keylen)
819 tk_old = old->conf.key;
820 tk_new = new->conf.key;
823 * In station mode, don't compare the TX MIC key, as it's never used
824 * and offloaded rekeying may not care to send it to the host. This
825 * is the case in iwlwifi, for example.
827 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
828 new->conf.cipher == WLAN_CIPHER_SUITE_TKIP &&
829 new->conf.keylen == WLAN_KEY_LEN_TKIP &&
830 !(new->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
831 memcpy(tkip_old, tk_old, WLAN_KEY_LEN_TKIP);
832 memcpy(tkip_new, tk_new, WLAN_KEY_LEN_TKIP);
833 memset(tkip_old + NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY, 0, 8);
834 memset(tkip_new + NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY, 0, 8);
839 return !crypto_memneq(tk_old, tk_new, new->conf.keylen);
842 int ieee80211_key_link(struct ieee80211_key *key,
843 struct ieee80211_link_data *link,
844 struct sta_info *sta)
846 struct ieee80211_sub_if_data *sdata = link->sdata;
847 static atomic_t key_color = ATOMIC_INIT(0);
848 struct ieee80211_key *old_key = NULL;
849 int idx = key->conf.keyidx;
850 bool pairwise = key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE;
852 * We want to delay tailroom updates only for station - in that
853 * case it helps roaming speed, but in other cases it hurts and
854 * can cause warnings to appear.
856 bool delay_tailroom = sdata->vif.type == NL80211_IFTYPE_STATION;
859 lockdep_assert_wiphy(sdata->local->hw.wiphy);
861 if (sta && pairwise) {
862 struct ieee80211_key *alt_key;
864 old_key = wiphy_dereference(sdata->local->hw.wiphy,
866 alt_key = wiphy_dereference(sdata->local->hw.wiphy,
869 /* The rekey code assumes that the old and new key are using
870 * the same cipher. Enforce the assumption for pairwise keys.
872 if ((alt_key && alt_key->conf.cipher != key->conf.cipher) ||
873 (old_key && old_key->conf.cipher != key->conf.cipher)) {
878 struct link_sta_info *link_sta = &sta->deflink;
879 int link_id = key->conf.link_id;
882 link_sta = rcu_dereference_protected(sta->link[link_id],
883 lockdep_is_held(&sta->local->hw.wiphy->mtx));
890 old_key = wiphy_dereference(sdata->local->hw.wiphy,
893 if (idx < NUM_DEFAULT_KEYS)
894 old_key = wiphy_dereference(sdata->local->hw.wiphy,
897 old_key = wiphy_dereference(sdata->local->hw.wiphy,
901 /* Non-pairwise keys must also not switch the cipher on rekey */
903 if (old_key && old_key->conf.cipher != key->conf.cipher) {
910 * Silently accept key re-installation without really installing the
911 * new version of the key to avoid nonce reuse or replay issues.
913 if (ieee80211_key_identical(sdata, old_key, key)) {
918 key->local = sdata->local;
923 * Assign a unique ID to every key so we can easily prevent mixed
924 * key and fragment cache attacks.
926 key->color = atomic_inc_return(&key_color);
928 increment_tailroom_need_count(sdata);
930 ret = ieee80211_key_replace(sdata, link, sta, pairwise, old_key, key);
933 ieee80211_debugfs_key_add(key);
934 ieee80211_key_destroy(old_key, delay_tailroom);
936 ieee80211_key_free(key, delay_tailroom);
942 ieee80211_key_free_unused(key);
946 void ieee80211_key_free(struct ieee80211_key *key, bool delay_tailroom)
952 * Replace key with nothingness if it was ever used.
955 ieee80211_key_replace(key->sdata, NULL, key->sta,
956 key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE,
958 ieee80211_key_destroy(key, delay_tailroom);
961 void ieee80211_reenable_keys(struct ieee80211_sub_if_data *sdata)
963 struct ieee80211_key *key;
964 struct ieee80211_sub_if_data *vlan;
966 lockdep_assert_wiphy(sdata->local->hw.wiphy);
968 sdata->crypto_tx_tailroom_needed_cnt = 0;
969 sdata->crypto_tx_tailroom_pending_dec = 0;
971 if (sdata->vif.type == NL80211_IFTYPE_AP) {
972 list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) {
973 vlan->crypto_tx_tailroom_needed_cnt = 0;
974 vlan->crypto_tx_tailroom_pending_dec = 0;
978 if (ieee80211_sdata_running(sdata)) {
979 list_for_each_entry(key, &sdata->key_list, list) {
980 increment_tailroom_need_count(sdata);
981 ieee80211_key_enable_hw_accel(key);
986 void ieee80211_iter_keys(struct ieee80211_hw *hw,
987 struct ieee80211_vif *vif,
988 void (*iter)(struct ieee80211_hw *hw,
989 struct ieee80211_vif *vif,
990 struct ieee80211_sta *sta,
991 struct ieee80211_key_conf *key,
995 struct ieee80211_local *local = hw_to_local(hw);
996 struct ieee80211_key *key, *tmp;
997 struct ieee80211_sub_if_data *sdata;
999 lockdep_assert_wiphy(hw->wiphy);
1002 sdata = vif_to_sdata(vif);
1003 list_for_each_entry_safe(key, tmp, &sdata->key_list, list)
1004 iter(hw, &sdata->vif,
1005 key->sta ? &key->sta->sta : NULL,
1006 &key->conf, iter_data);
1008 list_for_each_entry(sdata, &local->interfaces, list)
1009 list_for_each_entry_safe(key, tmp,
1010 &sdata->key_list, list)
1011 iter(hw, &sdata->vif,
1012 key->sta ? &key->sta->sta : NULL,
1013 &key->conf, iter_data);
1016 EXPORT_SYMBOL(ieee80211_iter_keys);
1019 _ieee80211_iter_keys_rcu(struct ieee80211_hw *hw,
1020 struct ieee80211_sub_if_data *sdata,
1021 void (*iter)(struct ieee80211_hw *hw,
1022 struct ieee80211_vif *vif,
1023 struct ieee80211_sta *sta,
1024 struct ieee80211_key_conf *key,
1028 struct ieee80211_key *key;
1030 list_for_each_entry_rcu(key, &sdata->key_list, list) {
1031 /* skip keys of station in removal process */
1032 if (key->sta && key->sta->removed)
1034 if (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
1037 iter(hw, &sdata->vif,
1038 key->sta ? &key->sta->sta : NULL,
1039 &key->conf, iter_data);
1043 void ieee80211_iter_keys_rcu(struct ieee80211_hw *hw,
1044 struct ieee80211_vif *vif,
1045 void (*iter)(struct ieee80211_hw *hw,
1046 struct ieee80211_vif *vif,
1047 struct ieee80211_sta *sta,
1048 struct ieee80211_key_conf *key,
1052 struct ieee80211_local *local = hw_to_local(hw);
1053 struct ieee80211_sub_if_data *sdata;
1056 sdata = vif_to_sdata(vif);
1057 _ieee80211_iter_keys_rcu(hw, sdata, iter, iter_data);
1059 list_for_each_entry_rcu(sdata, &local->interfaces, list)
1060 _ieee80211_iter_keys_rcu(hw, sdata, iter, iter_data);
1063 EXPORT_SYMBOL(ieee80211_iter_keys_rcu);
1065 static void ieee80211_free_keys_iface(struct ieee80211_sub_if_data *sdata,
1066 struct list_head *keys)
1068 struct ieee80211_key *key, *tmp;
1070 decrease_tailroom_need_count(sdata,
1071 sdata->crypto_tx_tailroom_pending_dec);
1072 sdata->crypto_tx_tailroom_pending_dec = 0;
1074 ieee80211_debugfs_key_remove_mgmt_default(sdata);
1075 ieee80211_debugfs_key_remove_beacon_default(sdata);
1077 list_for_each_entry_safe(key, tmp, &sdata->key_list, list) {
1078 ieee80211_key_replace(key->sdata, NULL, key->sta,
1079 key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE,
1081 list_add_tail(&key->list, keys);
1084 ieee80211_debugfs_key_update_default(sdata);
1087 void ieee80211_remove_link_keys(struct ieee80211_link_data *link,
1088 struct list_head *keys)
1090 struct ieee80211_sub_if_data *sdata = link->sdata;
1091 struct ieee80211_local *local = sdata->local;
1092 struct ieee80211_key *key, *tmp;
1094 lockdep_assert_wiphy(local->hw.wiphy);
1096 list_for_each_entry_safe(key, tmp, &sdata->key_list, list) {
1097 if (key->conf.link_id != link->link_id)
1099 ieee80211_key_replace(key->sdata, link, key->sta,
1100 key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE,
1102 list_add_tail(&key->list, keys);
1106 void ieee80211_free_key_list(struct ieee80211_local *local,
1107 struct list_head *keys)
1109 struct ieee80211_key *key, *tmp;
1111 lockdep_assert_wiphy(local->hw.wiphy);
1113 list_for_each_entry_safe(key, tmp, keys, list)
1114 __ieee80211_key_destroy(key, false);
1117 void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata,
1118 bool force_synchronize)
1120 struct ieee80211_local *local = sdata->local;
1121 struct ieee80211_sub_if_data *vlan;
1122 struct ieee80211_sub_if_data *master;
1123 struct ieee80211_key *key, *tmp;
1126 wiphy_delayed_work_cancel(local->hw.wiphy,
1127 &sdata->dec_tailroom_needed_wk);
1129 lockdep_assert_wiphy(local->hw.wiphy);
1131 ieee80211_free_keys_iface(sdata, &keys);
1133 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1134 list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
1135 ieee80211_free_keys_iface(vlan, &keys);
1138 if (!list_empty(&keys) || force_synchronize)
1140 list_for_each_entry_safe(key, tmp, &keys, list)
1141 __ieee80211_key_destroy(key, false);
1143 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1145 master = container_of(sdata->bss,
1146 struct ieee80211_sub_if_data,
1149 WARN_ON_ONCE(sdata->crypto_tx_tailroom_needed_cnt !=
1150 master->crypto_tx_tailroom_needed_cnt);
1153 WARN_ON_ONCE(sdata->crypto_tx_tailroom_needed_cnt ||
1154 sdata->crypto_tx_tailroom_pending_dec);
1157 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1158 list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
1159 WARN_ON_ONCE(vlan->crypto_tx_tailroom_needed_cnt ||
1160 vlan->crypto_tx_tailroom_pending_dec);
1164 void ieee80211_free_sta_keys(struct ieee80211_local *local,
1165 struct sta_info *sta)
1167 struct ieee80211_key *key;
1170 lockdep_assert_wiphy(local->hw.wiphy);
1172 for (i = 0; i < ARRAY_SIZE(sta->deflink.gtk); i++) {
1173 key = wiphy_dereference(local->hw.wiphy, sta->deflink.gtk[i]);
1176 ieee80211_key_replace(key->sdata, NULL, key->sta,
1177 key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE,
1179 __ieee80211_key_destroy(key, key->sdata->vif.type ==
1180 NL80211_IFTYPE_STATION);
1183 for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
1184 key = wiphy_dereference(local->hw.wiphy, sta->ptk[i]);
1187 ieee80211_key_replace(key->sdata, NULL, key->sta,
1188 key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE,
1190 __ieee80211_key_destroy(key, key->sdata->vif.type ==
1191 NL80211_IFTYPE_STATION);
1195 void ieee80211_delayed_tailroom_dec(struct wiphy *wiphy,
1196 struct wiphy_work *wk)
1198 struct ieee80211_sub_if_data *sdata;
1200 sdata = container_of(wk, struct ieee80211_sub_if_data,
1201 dec_tailroom_needed_wk.work);
1204 * The reason for the delayed tailroom needed decrementing is to
1205 * make roaming faster: during roaming, all keys are first deleted
1206 * and then new keys are installed. The first new key causes the
1207 * crypto_tx_tailroom_needed_cnt to go from 0 to 1, which invokes
1208 * the cost of synchronize_net() (which can be slow). Avoid this
1209 * by deferring the crypto_tx_tailroom_needed_cnt decrementing on
1210 * key removal for a while, so if we roam the value is larger than
1211 * zero and no 0->1 transition happens.
1213 * The cost is that if the AP switching was from an AP with keys
1214 * to one without, we still allocate tailroom while it would no
1215 * longer be needed. However, in the typical (fast) roaming case
1216 * within an ESS this usually won't happen.
1219 decrease_tailroom_need_count(sdata,
1220 sdata->crypto_tx_tailroom_pending_dec);
1221 sdata->crypto_tx_tailroom_pending_dec = 0;
1224 void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid,
1225 const u8 *replay_ctr, gfp_t gfp)
1227 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1229 trace_api_gtk_rekey_notify(sdata, bssid, replay_ctr);
1231 cfg80211_gtk_rekey_notify(sdata->dev, bssid, replay_ctr, gfp);
1233 EXPORT_SYMBOL_GPL(ieee80211_gtk_rekey_notify);
1235 void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf,
1236 int tid, struct ieee80211_key_seq *seq)
1238 struct ieee80211_key *key;
1241 key = container_of(keyconf, struct ieee80211_key, conf);
1243 switch (key->conf.cipher) {
1244 case WLAN_CIPHER_SUITE_TKIP:
1245 if (WARN_ON(tid < 0 || tid >= IEEE80211_NUM_TIDS))
1247 seq->tkip.iv32 = key->u.tkip.rx[tid].iv32;
1248 seq->tkip.iv16 = key->u.tkip.rx[tid].iv16;
1250 case WLAN_CIPHER_SUITE_CCMP:
1251 case WLAN_CIPHER_SUITE_CCMP_256:
1252 if (WARN_ON(tid < -1 || tid >= IEEE80211_NUM_TIDS))
1255 pn = key->u.ccmp.rx_pn[IEEE80211_NUM_TIDS];
1257 pn = key->u.ccmp.rx_pn[tid];
1258 memcpy(seq->ccmp.pn, pn, IEEE80211_CCMP_PN_LEN);
1260 case WLAN_CIPHER_SUITE_AES_CMAC:
1261 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
1262 if (WARN_ON(tid != 0))
1264 pn = key->u.aes_cmac.rx_pn;
1265 memcpy(seq->aes_cmac.pn, pn, IEEE80211_CMAC_PN_LEN);
1267 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
1268 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
1269 if (WARN_ON(tid != 0))
1271 pn = key->u.aes_gmac.rx_pn;
1272 memcpy(seq->aes_gmac.pn, pn, IEEE80211_GMAC_PN_LEN);
1274 case WLAN_CIPHER_SUITE_GCMP:
1275 case WLAN_CIPHER_SUITE_GCMP_256:
1276 if (WARN_ON(tid < -1 || tid >= IEEE80211_NUM_TIDS))
1279 pn = key->u.gcmp.rx_pn[IEEE80211_NUM_TIDS];
1281 pn = key->u.gcmp.rx_pn[tid];
1282 memcpy(seq->gcmp.pn, pn, IEEE80211_GCMP_PN_LEN);
1286 EXPORT_SYMBOL(ieee80211_get_key_rx_seq);
1288 void ieee80211_set_key_rx_seq(struct ieee80211_key_conf *keyconf,
1289 int tid, struct ieee80211_key_seq *seq)
1291 struct ieee80211_key *key;
1294 key = container_of(keyconf, struct ieee80211_key, conf);
1296 switch (key->conf.cipher) {
1297 case WLAN_CIPHER_SUITE_TKIP:
1298 if (WARN_ON(tid < 0 || tid >= IEEE80211_NUM_TIDS))
1300 key->u.tkip.rx[tid].iv32 = seq->tkip.iv32;
1301 key->u.tkip.rx[tid].iv16 = seq->tkip.iv16;
1303 case WLAN_CIPHER_SUITE_CCMP:
1304 case WLAN_CIPHER_SUITE_CCMP_256:
1305 if (WARN_ON(tid < -1 || tid >= IEEE80211_NUM_TIDS))
1308 pn = key->u.ccmp.rx_pn[IEEE80211_NUM_TIDS];
1310 pn = key->u.ccmp.rx_pn[tid];
1311 memcpy(pn, seq->ccmp.pn, IEEE80211_CCMP_PN_LEN);
1313 case WLAN_CIPHER_SUITE_AES_CMAC:
1314 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
1315 if (WARN_ON(tid != 0))
1317 pn = key->u.aes_cmac.rx_pn;
1318 memcpy(pn, seq->aes_cmac.pn, IEEE80211_CMAC_PN_LEN);
1320 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
1321 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
1322 if (WARN_ON(tid != 0))
1324 pn = key->u.aes_gmac.rx_pn;
1325 memcpy(pn, seq->aes_gmac.pn, IEEE80211_GMAC_PN_LEN);
1327 case WLAN_CIPHER_SUITE_GCMP:
1328 case WLAN_CIPHER_SUITE_GCMP_256:
1329 if (WARN_ON(tid < -1 || tid >= IEEE80211_NUM_TIDS))
1332 pn = key->u.gcmp.rx_pn[IEEE80211_NUM_TIDS];
1334 pn = key->u.gcmp.rx_pn[tid];
1335 memcpy(pn, seq->gcmp.pn, IEEE80211_GCMP_PN_LEN);
1342 EXPORT_SYMBOL_GPL(ieee80211_set_key_rx_seq);
1344 void ieee80211_remove_key(struct ieee80211_key_conf *keyconf)
1346 struct ieee80211_key *key;
1348 key = container_of(keyconf, struct ieee80211_key, conf);
1350 lockdep_assert_wiphy(key->local->hw.wiphy);
1353 * if key was uploaded, we assume the driver will/has remove(d)
1354 * it, so adjust bookkeeping accordingly
1356 if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) {
1357 key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE;
1359 if (!(key->conf.flags & (IEEE80211_KEY_FLAG_GENERATE_MMIC |
1360 IEEE80211_KEY_FLAG_PUT_MIC_SPACE |
1361 IEEE80211_KEY_FLAG_RESERVE_TAILROOM)))
1362 increment_tailroom_need_count(key->sdata);
1365 ieee80211_key_free(key, false);
1367 EXPORT_SYMBOL_GPL(ieee80211_remove_key);
1369 struct ieee80211_key_conf *
1370 ieee80211_gtk_rekey_add(struct ieee80211_vif *vif,
1371 struct ieee80211_key_conf *keyconf)
1373 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1374 struct ieee80211_local *local = sdata->local;
1375 struct ieee80211_key *key;
1378 if (WARN_ON(!local->wowlan))
1379 return ERR_PTR(-EINVAL);
1381 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1382 return ERR_PTR(-EINVAL);
1384 key = ieee80211_key_alloc(keyconf->cipher, keyconf->keyidx,
1385 keyconf->keylen, keyconf->key,
1388 return ERR_CAST(key);
1390 if (sdata->u.mgd.mfp != IEEE80211_MFP_DISABLED)
1391 key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT;
1393 /* FIXME: this function needs to get a link ID */
1394 err = ieee80211_key_link(key, &sdata->deflink, NULL);
1396 return ERR_PTR(err);
1400 EXPORT_SYMBOL_GPL(ieee80211_gtk_rekey_add);
1402 void ieee80211_key_mic_failure(struct ieee80211_key_conf *keyconf)
1404 struct ieee80211_key *key;
1406 key = container_of(keyconf, struct ieee80211_key, conf);
1408 switch (key->conf.cipher) {
1409 case WLAN_CIPHER_SUITE_AES_CMAC:
1410 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
1411 key->u.aes_cmac.icverrors++;
1413 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
1414 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
1415 key->u.aes_gmac.icverrors++;
1418 /* ignore the others for now, we don't keep counters now */
1422 EXPORT_SYMBOL_GPL(ieee80211_key_mic_failure);
1424 void ieee80211_key_replay(struct ieee80211_key_conf *keyconf)
1426 struct ieee80211_key *key;
1428 key = container_of(keyconf, struct ieee80211_key, conf);
1430 switch (key->conf.cipher) {
1431 case WLAN_CIPHER_SUITE_CCMP:
1432 case WLAN_CIPHER_SUITE_CCMP_256:
1433 key->u.ccmp.replays++;
1435 case WLAN_CIPHER_SUITE_AES_CMAC:
1436 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
1437 key->u.aes_cmac.replays++;
1439 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
1440 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
1441 key->u.aes_gmac.replays++;
1443 case WLAN_CIPHER_SUITE_GCMP:
1444 case WLAN_CIPHER_SUITE_GCMP_256:
1445 key->u.gcmp.replays++;
1449 EXPORT_SYMBOL_GPL(ieee80211_key_replay);
1451 int ieee80211_key_switch_links(struct ieee80211_sub_if_data *sdata,
1452 unsigned long del_links_mask,
1453 unsigned long add_links_mask)
1455 struct ieee80211_key *key;
1458 list_for_each_entry(key, &sdata->key_list, list) {
1459 if (key->conf.link_id < 0 ||
1460 !(del_links_mask & BIT(key->conf.link_id)))
1463 /* shouldn't happen for per-link keys */
1466 ieee80211_key_disable_hw_accel(key);
1469 list_for_each_entry(key, &sdata->key_list, list) {
1470 if (key->conf.link_id < 0 ||
1471 !(add_links_mask & BIT(key->conf.link_id)))
1474 /* shouldn't happen for per-link keys */
1477 ret = ieee80211_key_enable_hw_accel(key);