Commit | Line | Data |
---|---|---|
1f5a7e47 JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
3b96766f | 5 | * Copyright 2007-2008 Johannes Berg <johannes@sipsolutions.net> |
1f5a7e47 JB |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
11a843b7 JB |
12 | #include <linux/if_ether.h> |
13 | #include <linux/etherdevice.h> | |
14 | #include <linux/list.h> | |
d4e46a3d | 15 | #include <linux/rcupdate.h> |
db4d1169 | 16 | #include <linux/rtnetlink.h> |
5a0e3ad6 | 17 | #include <linux/slab.h> |
1f5a7e47 JB |
18 | #include <net/mac80211.h> |
19 | #include "ieee80211_i.h" | |
24487981 | 20 | #include "driver-ops.h" |
1f5a7e47 JB |
21 | #include "debugfs_key.h" |
22 | #include "aes_ccm.h" | |
3cfcf6ac | 23 | #include "aes_cmac.h" |
1f5a7e47 | 24 | |
11a843b7 | 25 | |
dbbea671 JB |
26 | /** |
27 | * DOC: Key handling basics | |
11a843b7 JB |
28 | * |
29 | * Key handling in mac80211 is done based on per-interface (sub_if_data) | |
30 | * keys and per-station keys. Since each station belongs to an interface, | |
31 | * each station key also belongs to that interface. | |
32 | * | |
b5c34f66 JB |
33 | * Hardware acceleration is done on a best-effort basis for algorithms |
34 | * that are implemented in software, for each key the hardware is asked | |
35 | * to enable that key for offloading but if it cannot do that the key is | |
36 | * simply kept for software encryption (unless it is for an algorithm | |
37 | * that isn't implemented in software). | |
38 | * There is currently no way of knowing whether a key is handled in SW | |
39 | * or HW except by looking into debugfs. | |
11a843b7 | 40 | * |
b5c34f66 JB |
41 | * All key management is internally protected by a mutex. Within all |
42 | * other parts of mac80211, key references are, just as STA structure | |
43 | * references, protected by RCU. Note, however, that some things are | |
44 | * unprotected, namely the key->sta dereferences within the hardware | |
45 | * acceleration functions. This means that sta_info_destroy() must | |
46 | * remove the key which waits for an RCU grace period. | |
11a843b7 JB |
47 | */ |
48 | ||
49 | static const u8 bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; | |
11a843b7 | 50 | |
ad0e2b5a | 51 | static void assert_key_lock(struct ieee80211_local *local) |
3b96766f | 52 | { |
46a5ebaf | 53 | lockdep_assert_held(&local->key_mtx); |
3b96766f JB |
54 | } |
55 | ||
dc822b5d | 56 | static struct ieee80211_sta *get_sta_for_key(struct ieee80211_key *key) |
11a843b7 | 57 | { |
11a843b7 | 58 | if (key->sta) |
dc822b5d | 59 | return &key->sta->sta; |
11a843b7 | 60 | |
dc822b5d | 61 | return NULL; |
11a843b7 JB |
62 | } |
63 | ||
3bff1865 YAP |
64 | static void increment_tailroom_need_count(struct ieee80211_sub_if_data *sdata) |
65 | { | |
66 | /* | |
67 | * When this count is zero, SKB resizing for allocating tailroom | |
68 | * for IV or MMIC is skipped. But, this check has created two race | |
69 | * cases in xmit path while transiting from zero count to one: | |
70 | * | |
71 | * 1. SKB resize was skipped because no key was added but just before | |
72 | * the xmit key is added and SW encryption kicks off. | |
73 | * | |
74 | * 2. SKB resize was skipped because all the keys were hw planted but | |
75 | * just before xmit one of the key is deleted and SW encryption kicks | |
76 | * off. | |
77 | * | |
78 | * In both the above case SW encryption will find not enough space for | |
79 | * tailroom and exits with WARN_ON. (See WARN_ONs at wpa.c) | |
80 | * | |
81 | * Solution has been explained at | |
82 | * http://mid.gmane.org/1308590980.4322.19.camel@jlt3.sipsolutions.net | |
83 | */ | |
84 | ||
85 | if (!sdata->crypto_tx_tailroom_needed_cnt++) { | |
86 | /* | |
87 | * Flush all XMIT packets currently using HW encryption or no | |
88 | * encryption at all if the count transition is from 0 -> 1. | |
89 | */ | |
90 | synchronize_net(); | |
91 | } | |
92 | } | |
93 | ||
3ffc2a90 | 94 | static int ieee80211_key_enable_hw_accel(struct ieee80211_key *key) |
11a843b7 | 95 | { |
dc822b5d JB |
96 | struct ieee80211_sub_if_data *sdata; |
97 | struct ieee80211_sta *sta; | |
11a843b7 JB |
98 | int ret; |
99 | ||
3b96766f JB |
100 | might_sleep(); |
101 | ||
e31b8213 | 102 | if (!key->local->ops->set_key) |
3ffc2a90 | 103 | goto out_unsupported; |
11a843b7 | 104 | |
ad0e2b5a JB |
105 | assert_key_lock(key->local); |
106 | ||
dc822b5d JB |
107 | sta = get_sta_for_key(key); |
108 | ||
e31b8213 JB |
109 | /* |
110 | * If this is a per-STA GTK, check if it | |
111 | * is supported; if not, return. | |
112 | */ | |
113 | if (sta && !(key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE) && | |
114 | !(key->local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK)) | |
115 | goto out_unsupported; | |
116 | ||
dc822b5d | 117 | sdata = key->sdata; |
18890d4b HS |
118 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
119 | /* | |
120 | * The driver doesn't know anything about VLAN interfaces. | |
121 | * Hence, don't send GTKs for VLAN interfaces to the driver. | |
122 | */ | |
123 | if (!(key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE)) | |
124 | goto out_unsupported; | |
dc822b5d JB |
125 | sdata = container_of(sdata->bss, |
126 | struct ieee80211_sub_if_data, | |
127 | u.ap); | |
18890d4b | 128 | } |
11a843b7 | 129 | |
12375ef9 | 130 | ret = drv_set_key(key->local, SET_KEY, sdata, sta, &key->conf); |
11a843b7 | 131 | |
e31b8213 | 132 | if (!ret) { |
11a843b7 | 133 | key->flags |= KEY_FLAG_UPLOADED_TO_HARDWARE; |
3bff1865 YAP |
134 | |
135 | if (!((key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC) || | |
136 | (key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))) | |
137 | sdata->crypto_tx_tailroom_needed_cnt--; | |
138 | ||
e31b8213 JB |
139 | return 0; |
140 | } | |
11a843b7 | 141 | |
e31b8213 | 142 | if (ret != -ENOSPC && ret != -EOPNOTSUPP) |
0fb9a9ec JP |
143 | wiphy_err(key->local->hw.wiphy, |
144 | "failed to set key (%d, %pM) to hardware (%d)\n", | |
145 | key->conf.keyidx, sta ? sta->addr : bcast_addr, ret); | |
3ffc2a90 | 146 | |
e31b8213 JB |
147 | out_unsupported: |
148 | switch (key->conf.cipher) { | |
149 | case WLAN_CIPHER_SUITE_WEP40: | |
150 | case WLAN_CIPHER_SUITE_WEP104: | |
151 | case WLAN_CIPHER_SUITE_TKIP: | |
152 | case WLAN_CIPHER_SUITE_CCMP: | |
153 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
154 | /* all of these we can do in software */ | |
155 | return 0; | |
156 | default: | |
157 | return -EINVAL; | |
3ffc2a90 | 158 | } |
11a843b7 JB |
159 | } |
160 | ||
161 | static void ieee80211_key_disable_hw_accel(struct ieee80211_key *key) | |
162 | { | |
dc822b5d JB |
163 | struct ieee80211_sub_if_data *sdata; |
164 | struct ieee80211_sta *sta; | |
11a843b7 JB |
165 | int ret; |
166 | ||
3b96766f JB |
167 | might_sleep(); |
168 | ||
db4d1169 | 169 | if (!key || !key->local->ops->set_key) |
11a843b7 JB |
170 | return; |
171 | ||
ad0e2b5a JB |
172 | assert_key_lock(key->local); |
173 | ||
174 | if (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) | |
11a843b7 JB |
175 | return; |
176 | ||
dc822b5d JB |
177 | sta = get_sta_for_key(key); |
178 | sdata = key->sdata; | |
179 | ||
3bff1865 YAP |
180 | if (!((key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC) || |
181 | (key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))) | |
182 | increment_tailroom_need_count(sdata); | |
183 | ||
dc822b5d JB |
184 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
185 | sdata = container_of(sdata->bss, | |
186 | struct ieee80211_sub_if_data, | |
187 | u.ap); | |
11a843b7 | 188 | |
12375ef9 | 189 | ret = drv_set_key(key->local, DISABLE_KEY, sdata, |
24487981 | 190 | sta, &key->conf); |
11a843b7 JB |
191 | |
192 | if (ret) | |
0fb9a9ec JP |
193 | wiphy_err(key->local->hw.wiphy, |
194 | "failed to remove key (%d, %pM) from hardware (%d)\n", | |
195 | key->conf.keyidx, sta ? sta->addr : bcast_addr, ret); | |
11a843b7 | 196 | |
3b96766f | 197 | key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE; |
3b96766f JB |
198 | } |
199 | ||
e31b8213 JB |
200 | void ieee80211_key_removed(struct ieee80211_key_conf *key_conf) |
201 | { | |
202 | struct ieee80211_key *key; | |
203 | ||
204 | key = container_of(key_conf, struct ieee80211_key, conf); | |
205 | ||
206 | might_sleep(); | |
207 | assert_key_lock(key->local); | |
208 | ||
209 | key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE; | |
210 | ||
211 | /* | |
212 | * Flush TX path to avoid attempts to use this key | |
213 | * after this function returns. Until then, drivers | |
214 | * must be prepared to handle the key. | |
215 | */ | |
216 | synchronize_rcu(); | |
217 | } | |
218 | EXPORT_SYMBOL_GPL(ieee80211_key_removed); | |
219 | ||
3b96766f | 220 | static void __ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, |
f7e0104c | 221 | int idx, bool uni, bool multi) |
3b96766f JB |
222 | { |
223 | struct ieee80211_key *key = NULL; | |
224 | ||
ad0e2b5a JB |
225 | assert_key_lock(sdata->local); |
226 | ||
3b96766f | 227 | if (idx >= 0 && idx < NUM_DEFAULT_KEYS) |
40b275b6 | 228 | key = key_mtx_dereference(sdata->local, sdata->keys[idx]); |
3b96766f | 229 | |
f7e0104c JB |
230 | if (uni) |
231 | rcu_assign_pointer(sdata->default_unicast_key, key); | |
232 | if (multi) | |
233 | rcu_assign_pointer(sdata->default_multicast_key, key); | |
3b96766f | 234 | |
f7e0104c | 235 | ieee80211_debugfs_key_update_default(sdata); |
3b96766f JB |
236 | } |
237 | ||
f7e0104c JB |
238 | void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx, |
239 | bool uni, bool multi) | |
3b96766f | 240 | { |
ad0e2b5a | 241 | mutex_lock(&sdata->local->key_mtx); |
f7e0104c | 242 | __ieee80211_set_default_key(sdata, idx, uni, multi); |
ad0e2b5a | 243 | mutex_unlock(&sdata->local->key_mtx); |
3b96766f JB |
244 | } |
245 | ||
3cfcf6ac JM |
246 | static void |
247 | __ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata, int idx) | |
248 | { | |
249 | struct ieee80211_key *key = NULL; | |
250 | ||
ad0e2b5a JB |
251 | assert_key_lock(sdata->local); |
252 | ||
3cfcf6ac JM |
253 | if (idx >= NUM_DEFAULT_KEYS && |
254 | idx < NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS) | |
40b275b6 | 255 | key = key_mtx_dereference(sdata->local, sdata->keys[idx]); |
3cfcf6ac JM |
256 | |
257 | rcu_assign_pointer(sdata->default_mgmt_key, key); | |
258 | ||
f7e0104c | 259 | ieee80211_debugfs_key_update_default(sdata); |
3cfcf6ac JM |
260 | } |
261 | ||
262 | void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata, | |
263 | int idx) | |
264 | { | |
ad0e2b5a | 265 | mutex_lock(&sdata->local->key_mtx); |
3cfcf6ac | 266 | __ieee80211_set_default_mgmt_key(sdata, idx); |
ad0e2b5a | 267 | mutex_unlock(&sdata->local->key_mtx); |
3cfcf6ac JM |
268 | } |
269 | ||
3b96766f JB |
270 | |
271 | static void __ieee80211_key_replace(struct ieee80211_sub_if_data *sdata, | |
272 | struct sta_info *sta, | |
e31b8213 | 273 | bool pairwise, |
3b96766f JB |
274 | struct ieee80211_key *old, |
275 | struct ieee80211_key *new) | |
276 | { | |
f7e0104c JB |
277 | int idx; |
278 | bool defunikey, defmultikey, defmgmtkey; | |
3b96766f JB |
279 | |
280 | if (new) | |
f850e00f | 281 | list_add_tail(&new->list, &sdata->key_list); |
3b96766f | 282 | |
e31b8213 JB |
283 | if (sta && pairwise) { |
284 | rcu_assign_pointer(sta->ptk, new); | |
285 | } else if (sta) { | |
286 | if (old) | |
287 | idx = old->conf.keyidx; | |
288 | else | |
289 | idx = new->conf.keyidx; | |
290 | rcu_assign_pointer(sta->gtk[idx], new); | |
3b96766f JB |
291 | } else { |
292 | WARN_ON(new && old && new->conf.keyidx != old->conf.keyidx); | |
293 | ||
294 | if (old) | |
295 | idx = old->conf.keyidx; | |
296 | else | |
297 | idx = new->conf.keyidx; | |
298 | ||
40b275b6 JB |
299 | defunikey = old && |
300 | old == key_mtx_dereference(sdata->local, | |
301 | sdata->default_unicast_key); | |
302 | defmultikey = old && | |
303 | old == key_mtx_dereference(sdata->local, | |
304 | sdata->default_multicast_key); | |
305 | defmgmtkey = old && | |
306 | old == key_mtx_dereference(sdata->local, | |
307 | sdata->default_mgmt_key); | |
3b96766f | 308 | |
f7e0104c JB |
309 | if (defunikey && !new) |
310 | __ieee80211_set_default_key(sdata, -1, true, false); | |
311 | if (defmultikey && !new) | |
312 | __ieee80211_set_default_key(sdata, -1, false, true); | |
3cfcf6ac JM |
313 | if (defmgmtkey && !new) |
314 | __ieee80211_set_default_mgmt_key(sdata, -1); | |
3b96766f JB |
315 | |
316 | rcu_assign_pointer(sdata->keys[idx], new); | |
f7e0104c JB |
317 | if (defunikey && new) |
318 | __ieee80211_set_default_key(sdata, new->conf.keyidx, | |
319 | true, false); | |
320 | if (defmultikey && new) | |
321 | __ieee80211_set_default_key(sdata, new->conf.keyidx, | |
322 | false, true); | |
3cfcf6ac JM |
323 | if (defmgmtkey && new) |
324 | __ieee80211_set_default_mgmt_key(sdata, | |
325 | new->conf.keyidx); | |
3b96766f JB |
326 | } |
327 | ||
b5c34f66 JB |
328 | if (old) |
329 | list_del(&old->list); | |
11a843b7 JB |
330 | } |
331 | ||
97359d12 | 332 | struct ieee80211_key *ieee80211_key_alloc(u32 cipher, int idx, size_t key_len, |
faa8fdc8 JM |
333 | const u8 *key_data, |
334 | size_t seq_len, const u8 *seq) | |
1f5a7e47 JB |
335 | { |
336 | struct ieee80211_key *key; | |
1ac62ba7 | 337 | int i, j, err; |
1f5a7e47 | 338 | |
3cfcf6ac | 339 | BUG_ON(idx < 0 || idx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS); |
11a843b7 JB |
340 | |
341 | key = kzalloc(sizeof(struct ieee80211_key) + key_len, GFP_KERNEL); | |
1f5a7e47 | 342 | if (!key) |
1ac62ba7 | 343 | return ERR_PTR(-ENOMEM); |
11a843b7 JB |
344 | |
345 | /* | |
346 | * Default to software encryption; we'll later upload the | |
347 | * key to the hardware if possible. | |
348 | */ | |
11a843b7 JB |
349 | key->conf.flags = 0; |
350 | key->flags = 0; | |
351 | ||
97359d12 | 352 | key->conf.cipher = cipher; |
11a843b7 JB |
353 | key->conf.keyidx = idx; |
354 | key->conf.keylen = key_len; | |
97359d12 JB |
355 | switch (cipher) { |
356 | case WLAN_CIPHER_SUITE_WEP40: | |
357 | case WLAN_CIPHER_SUITE_WEP104: | |
76708dee FF |
358 | key->conf.iv_len = WEP_IV_LEN; |
359 | key->conf.icv_len = WEP_ICV_LEN; | |
360 | break; | |
97359d12 | 361 | case WLAN_CIPHER_SUITE_TKIP: |
76708dee FF |
362 | key->conf.iv_len = TKIP_IV_LEN; |
363 | key->conf.icv_len = TKIP_ICV_LEN; | |
9f26a952 | 364 | if (seq) { |
faa8fdc8 JM |
365 | for (i = 0; i < NUM_RX_DATA_QUEUES; i++) { |
366 | key->u.tkip.rx[i].iv32 = | |
367 | get_unaligned_le32(&seq[2]); | |
368 | key->u.tkip.rx[i].iv16 = | |
369 | get_unaligned_le16(seq); | |
370 | } | |
371 | } | |
523b02ea | 372 | spin_lock_init(&key->u.tkip.txlock); |
76708dee | 373 | break; |
97359d12 | 374 | case WLAN_CIPHER_SUITE_CCMP: |
76708dee FF |
375 | key->conf.iv_len = CCMP_HDR_LEN; |
376 | key->conf.icv_len = CCMP_MIC_LEN; | |
9f26a952 | 377 | if (seq) { |
9190252c | 378 | for (i = 0; i < NUM_RX_DATA_QUEUES + 1; i++) |
faa8fdc8 JM |
379 | for (j = 0; j < CCMP_PN_LEN; j++) |
380 | key->u.ccmp.rx_pn[i][j] = | |
381 | seq[CCMP_PN_LEN - j - 1]; | |
382 | } | |
11a843b7 JB |
383 | /* |
384 | * Initialize AES key state here as an optimization so that | |
385 | * it does not need to be initialized for every packet. | |
386 | */ | |
387 | key->u.ccmp.tfm = ieee80211_aes_key_setup_encrypt(key_data); | |
1ac62ba7 BH |
388 | if (IS_ERR(key->u.ccmp.tfm)) { |
389 | err = PTR_ERR(key->u.ccmp.tfm); | |
3b96766f | 390 | kfree(key); |
1f951a7f | 391 | return ERR_PTR(err); |
11a843b7 | 392 | } |
60ae0f20 JB |
393 | break; |
394 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
395 | key->conf.iv_len = 0; | |
396 | key->conf.icv_len = sizeof(struct ieee80211_mmie); | |
397 | if (seq) | |
398 | for (j = 0; j < 6; j++) | |
399 | key->u.aes_cmac.rx_pn[j] = seq[6 - j - 1]; | |
3cfcf6ac JM |
400 | /* |
401 | * Initialize AES key state here as an optimization so that | |
402 | * it does not need to be initialized for every packet. | |
403 | */ | |
404 | key->u.aes_cmac.tfm = | |
405 | ieee80211_aes_cmac_key_setup(key_data); | |
1ac62ba7 BH |
406 | if (IS_ERR(key->u.aes_cmac.tfm)) { |
407 | err = PTR_ERR(key->u.aes_cmac.tfm); | |
3cfcf6ac | 408 | kfree(key); |
1f951a7f | 409 | return ERR_PTR(err); |
3cfcf6ac | 410 | } |
60ae0f20 | 411 | break; |
3cfcf6ac | 412 | } |
60ae0f20 JB |
413 | memcpy(key->conf.key, key_data, key_len); |
414 | INIT_LIST_HEAD(&key->list); | |
3cfcf6ac | 415 | |
db4d1169 JB |
416 | return key; |
417 | } | |
11a843b7 | 418 | |
ad0e2b5a JB |
419 | static void __ieee80211_key_destroy(struct ieee80211_key *key) |
420 | { | |
421 | if (!key) | |
422 | return; | |
423 | ||
d2460f4b JB |
424 | /* |
425 | * Synchronize so the TX path can no longer be using | |
426 | * this key before we free/remove it. | |
427 | */ | |
428 | synchronize_rcu(); | |
429 | ||
32162a4d JM |
430 | if (key->local) |
431 | ieee80211_key_disable_hw_accel(key); | |
ad0e2b5a | 432 | |
97359d12 | 433 | if (key->conf.cipher == WLAN_CIPHER_SUITE_CCMP) |
ad0e2b5a | 434 | ieee80211_aes_key_free(key->u.ccmp.tfm); |
97359d12 | 435 | if (key->conf.cipher == WLAN_CIPHER_SUITE_AES_CMAC) |
ad0e2b5a | 436 | ieee80211_aes_cmac_key_free(key->u.aes_cmac.tfm); |
3bff1865 | 437 | if (key->local) { |
32162a4d | 438 | ieee80211_debugfs_key_remove(key); |
3bff1865 YAP |
439 | key->sdata->crypto_tx_tailroom_needed_cnt--; |
440 | } | |
ad0e2b5a JB |
441 | |
442 | kfree(key); | |
443 | } | |
444 | ||
3ffc2a90 JB |
445 | int ieee80211_key_link(struct ieee80211_key *key, |
446 | struct ieee80211_sub_if_data *sdata, | |
447 | struct sta_info *sta) | |
db4d1169 JB |
448 | { |
449 | struct ieee80211_key *old_key; | |
3ffc2a90 | 450 | int idx, ret; |
67aa030c | 451 | bool pairwise; |
db4d1169 | 452 | |
db4d1169 JB |
453 | BUG_ON(!sdata); |
454 | BUG_ON(!key); | |
455 | ||
67aa030c | 456 | pairwise = key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE; |
db4d1169 JB |
457 | idx = key->conf.keyidx; |
458 | key->local = sdata->local; | |
459 | key->sdata = sdata; | |
460 | key->sta = sta; | |
461 | ||
11a843b7 | 462 | if (sta) { |
11a843b7 JB |
463 | /* |
464 | * some hardware cannot handle TKIP with QoS, so | |
465 | * we indicate whether QoS could be in use. | |
466 | */ | |
c2c98fde | 467 | if (test_sta_flag(sta, WLAN_STA_WME)) |
11a843b7 JB |
468 | key->conf.flags |= IEEE80211_KEY_FLAG_WMM_STA; |
469 | } else { | |
05c914fe | 470 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
11a843b7 JB |
471 | struct sta_info *ap; |
472 | ||
3b96766f | 473 | /* |
b5c34f66 JB |
474 | * We're getting a sta pointer in, so must be under |
475 | * appropriate locking for sta_info_get(). | |
3b96766f | 476 | */ |
d0709a65 | 477 | |
11a843b7 | 478 | /* same here, the AP could be using QoS */ |
abe60632 | 479 | ap = sta_info_get(key->sdata, key->sdata->u.mgd.bssid); |
11a843b7 | 480 | if (ap) { |
c2c98fde | 481 | if (test_sta_flag(ap, WLAN_STA_WME)) |
11a843b7 JB |
482 | key->conf.flags |= |
483 | IEEE80211_KEY_FLAG_WMM_STA; | |
11a843b7 JB |
484 | } |
485 | } | |
11a843b7 JB |
486 | } |
487 | ||
ad0e2b5a | 488 | mutex_lock(&sdata->local->key_mtx); |
3b96766f | 489 | |
e31b8213 | 490 | if (sta && pairwise) |
40b275b6 | 491 | old_key = key_mtx_dereference(sdata->local, sta->ptk); |
e31b8213 | 492 | else if (sta) |
40b275b6 | 493 | old_key = key_mtx_dereference(sdata->local, sta->gtk[idx]); |
d4e46a3d | 494 | else |
40b275b6 | 495 | old_key = key_mtx_dereference(sdata->local, sdata->keys[idx]); |
db4d1169 | 496 | |
3bff1865 YAP |
497 | increment_tailroom_need_count(sdata); |
498 | ||
e31b8213 | 499 | __ieee80211_key_replace(sdata, sta, pairwise, old_key, key); |
ad0e2b5a | 500 | __ieee80211_key_destroy(old_key); |
d4e46a3d | 501 | |
ad0e2b5a | 502 | ieee80211_debugfs_key_add(key); |
db4d1169 | 503 | |
3ffc2a90 | 504 | ret = ieee80211_key_enable_hw_accel(key); |
523d2f69 | 505 | |
ad0e2b5a | 506 | mutex_unlock(&sdata->local->key_mtx); |
3ffc2a90 JB |
507 | |
508 | return ret; | |
1f5a7e47 JB |
509 | } |
510 | ||
5c0c3641 | 511 | void __ieee80211_key_free(struct ieee80211_key *key) |
1f5a7e47 | 512 | { |
5c0c3641 JB |
513 | if (!key) |
514 | return; | |
515 | ||
3b96766f JB |
516 | /* |
517 | * Replace key with nothingness if it was ever used. | |
518 | */ | |
3a245766 | 519 | if (key->sdata) |
3b96766f | 520 | __ieee80211_key_replace(key->sdata, key->sta, |
e31b8213 JB |
521 | key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE, |
522 | key, NULL); | |
ad0e2b5a | 523 | __ieee80211_key_destroy(key); |
3b96766f | 524 | } |
d4e46a3d | 525 | |
32162a4d JM |
526 | void ieee80211_key_free(struct ieee80211_local *local, |
527 | struct ieee80211_key *key) | |
3b96766f | 528 | { |
ad0e2b5a | 529 | mutex_lock(&local->key_mtx); |
3a245766 | 530 | __ieee80211_key_free(key); |
ad0e2b5a | 531 | mutex_unlock(&local->key_mtx); |
3a245766 JB |
532 | } |
533 | ||
ad0e2b5a | 534 | void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata) |
3a245766 JB |
535 | { |
536 | struct ieee80211_key *key; | |
11a843b7 | 537 | |
3a245766 | 538 | ASSERT_RTNL(); |
11a843b7 | 539 | |
9607e6b6 | 540 | if (WARN_ON(!ieee80211_sdata_running(sdata))) |
3a245766 | 541 | return; |
11a843b7 | 542 | |
ad0e2b5a | 543 | mutex_lock(&sdata->local->key_mtx); |
11a843b7 | 544 | |
3bff1865 YAP |
545 | sdata->crypto_tx_tailroom_needed_cnt = 0; |
546 | ||
547 | list_for_each_entry(key, &sdata->key_list, list) { | |
548 | increment_tailroom_need_count(sdata); | |
ad0e2b5a | 549 | ieee80211_key_enable_hw_accel(key); |
3bff1865 | 550 | } |
3b96766f | 551 | |
ad0e2b5a | 552 | mutex_unlock(&sdata->local->key_mtx); |
11a843b7 JB |
553 | } |
554 | ||
830af02f JB |
555 | void ieee80211_iter_keys(struct ieee80211_hw *hw, |
556 | struct ieee80211_vif *vif, | |
557 | void (*iter)(struct ieee80211_hw *hw, | |
558 | struct ieee80211_vif *vif, | |
559 | struct ieee80211_sta *sta, | |
560 | struct ieee80211_key_conf *key, | |
561 | void *data), | |
562 | void *iter_data) | |
563 | { | |
564 | struct ieee80211_local *local = hw_to_local(hw); | |
565 | struct ieee80211_key *key; | |
566 | struct ieee80211_sub_if_data *sdata; | |
567 | ||
568 | ASSERT_RTNL(); | |
569 | ||
570 | mutex_lock(&local->key_mtx); | |
571 | if (vif) { | |
572 | sdata = vif_to_sdata(vif); | |
573 | list_for_each_entry(key, &sdata->key_list, list) | |
574 | iter(hw, &sdata->vif, | |
575 | key->sta ? &key->sta->sta : NULL, | |
576 | &key->conf, iter_data); | |
577 | } else { | |
578 | list_for_each_entry(sdata, &local->interfaces, list) | |
579 | list_for_each_entry(key, &sdata->key_list, list) | |
580 | iter(hw, &sdata->vif, | |
581 | key->sta ? &key->sta->sta : NULL, | |
582 | &key->conf, iter_data); | |
583 | } | |
584 | mutex_unlock(&local->key_mtx); | |
585 | } | |
586 | EXPORT_SYMBOL(ieee80211_iter_keys); | |
587 | ||
ad0e2b5a | 588 | void ieee80211_disable_keys(struct ieee80211_sub_if_data *sdata) |
11a843b7 JB |
589 | { |
590 | struct ieee80211_key *key; | |
591 | ||
ad0e2b5a | 592 | ASSERT_RTNL(); |
db4d1169 | 593 | |
ad0e2b5a | 594 | mutex_lock(&sdata->local->key_mtx); |
11a843b7 | 595 | |
ad0e2b5a JB |
596 | list_for_each_entry(key, &sdata->key_list, list) |
597 | ieee80211_key_disable_hw_accel(key); | |
11a843b7 | 598 | |
ad0e2b5a | 599 | mutex_unlock(&sdata->local->key_mtx); |
3b96766f | 600 | } |
11a843b7 | 601 | |
3b96766f JB |
602 | void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata) |
603 | { | |
604 | struct ieee80211_key *key, *tmp; | |
db4d1169 | 605 | |
ad0e2b5a | 606 | mutex_lock(&sdata->local->key_mtx); |
3b96766f | 607 | |
3cfcf6ac | 608 | ieee80211_debugfs_key_remove_mgmt_default(sdata); |
3b96766f JB |
609 | |
610 | list_for_each_entry_safe(key, tmp, &sdata->key_list, list) | |
3a245766 | 611 | __ieee80211_key_free(key); |
3b96766f | 612 | |
f7e0104c JB |
613 | ieee80211_debugfs_key_update_default(sdata); |
614 | ||
ad0e2b5a | 615 | mutex_unlock(&sdata->local->key_mtx); |
11a843b7 | 616 | } |
c68f4b89 JB |
617 | |
618 | ||
619 | void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid, | |
620 | const u8 *replay_ctr, gfp_t gfp) | |
621 | { | |
622 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
623 | ||
624 | trace_api_gtk_rekey_notify(sdata, bssid, replay_ctr); | |
625 | ||
626 | cfg80211_gtk_rekey_notify(sdata->dev, bssid, replay_ctr, gfp); | |
627 | } | |
628 | EXPORT_SYMBOL_GPL(ieee80211_gtk_rekey_notify); | |
3ea542d3 JB |
629 | |
630 | void ieee80211_get_key_tx_seq(struct ieee80211_key_conf *keyconf, | |
631 | struct ieee80211_key_seq *seq) | |
632 | { | |
633 | struct ieee80211_key *key; | |
634 | u64 pn64; | |
635 | ||
636 | if (WARN_ON(!(keyconf->flags & IEEE80211_KEY_FLAG_GENERATE_IV))) | |
637 | return; | |
638 | ||
639 | key = container_of(keyconf, struct ieee80211_key, conf); | |
640 | ||
641 | switch (key->conf.cipher) { | |
642 | case WLAN_CIPHER_SUITE_TKIP: | |
643 | seq->tkip.iv32 = key->u.tkip.tx.iv32; | |
644 | seq->tkip.iv16 = key->u.tkip.tx.iv16; | |
645 | break; | |
646 | case WLAN_CIPHER_SUITE_CCMP: | |
647 | pn64 = atomic64_read(&key->u.ccmp.tx_pn); | |
648 | seq->ccmp.pn[5] = pn64; | |
649 | seq->ccmp.pn[4] = pn64 >> 8; | |
650 | seq->ccmp.pn[3] = pn64 >> 16; | |
651 | seq->ccmp.pn[2] = pn64 >> 24; | |
652 | seq->ccmp.pn[1] = pn64 >> 32; | |
653 | seq->ccmp.pn[0] = pn64 >> 40; | |
654 | break; | |
655 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
656 | pn64 = atomic64_read(&key->u.aes_cmac.tx_pn); | |
657 | seq->ccmp.pn[5] = pn64; | |
658 | seq->ccmp.pn[4] = pn64 >> 8; | |
659 | seq->ccmp.pn[3] = pn64 >> 16; | |
660 | seq->ccmp.pn[2] = pn64 >> 24; | |
661 | seq->ccmp.pn[1] = pn64 >> 32; | |
662 | seq->ccmp.pn[0] = pn64 >> 40; | |
663 | break; | |
664 | default: | |
665 | WARN_ON(1); | |
666 | } | |
667 | } | |
668 | EXPORT_SYMBOL(ieee80211_get_key_tx_seq); | |
669 | ||
670 | void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf, | |
671 | int tid, struct ieee80211_key_seq *seq) | |
672 | { | |
673 | struct ieee80211_key *key; | |
674 | const u8 *pn; | |
675 | ||
676 | key = container_of(keyconf, struct ieee80211_key, conf); | |
677 | ||
678 | switch (key->conf.cipher) { | |
679 | case WLAN_CIPHER_SUITE_TKIP: | |
680 | if (WARN_ON(tid < 0 || tid >= NUM_RX_DATA_QUEUES)) | |
681 | return; | |
682 | seq->tkip.iv32 = key->u.tkip.rx[tid].iv32; | |
683 | seq->tkip.iv16 = key->u.tkip.rx[tid].iv16; | |
684 | break; | |
685 | case WLAN_CIPHER_SUITE_CCMP: | |
686 | if (WARN_ON(tid < -1 || tid >= NUM_RX_DATA_QUEUES)) | |
687 | return; | |
688 | if (tid < 0) | |
689 | pn = key->u.ccmp.rx_pn[NUM_RX_DATA_QUEUES]; | |
690 | else | |
691 | pn = key->u.ccmp.rx_pn[tid]; | |
692 | memcpy(seq->ccmp.pn, pn, CCMP_PN_LEN); | |
693 | break; | |
694 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
695 | if (WARN_ON(tid != 0)) | |
696 | return; | |
697 | pn = key->u.aes_cmac.rx_pn; | |
698 | memcpy(seq->aes_cmac.pn, pn, CMAC_PN_LEN); | |
699 | break; | |
700 | } | |
701 | } | |
702 | EXPORT_SYMBOL(ieee80211_get_key_rx_seq); |