| 1 | |
| 2 | |
| 3 | * Copyright 2002-2005, Instant802 Networks, Inc.
|
| 4 | * Copyright 2005-2006, Devicescape Software, Inc.
|
| 5 | * Copyright 2006-2007 Jiri Benc <[email protected]>
|
| 6 | * Copyright 2007-2008 Johannes Berg <[email protected]>
|
| 7 | * Copyright 2013-2014 Intel Mobile Communications GmbH
|
| 8 | * Copyright 2015-2017 Intel Deutschland GmbH
|
| 9 | * Copyright 2018-2020, 2022-2026 Intel Corporation
|
| 10 |
|
| 11 |
|
| 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 <linux/unaligned.h>
|
| 22 | #include "ieee80211_i.h"
|
| 23 | #include "driver-ops.h"
|
| 24 | #include "debugfs_key.h"
|
| 25 | #include "aes_ccm.h"
|
| 26 | #include "aes_cmac.h"
|
| 27 | #include "aes_gmac.h"
|
| 28 | #include "aes_gcm.h"
|
| 29 |
|
| 30 |
|
| 31 | |
| 32 | * DOC: Key handling basics
|
| 33 | *
|
| 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.
|
| 37 | *
|
| 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.
|
| 45 | *
|
| 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.
|
| 52 |
|
| 53 |
|
| 54 | static const u8 bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
|
| 55 |
|
| 56 | static void
|
| 57 | update_vlan_tailroom_need_count(struct ieee80211_sub_if_data *sdata, int delta)
|
| 58 | {
|
| 59 | struct ieee80211_sub_if_data *vlan;
|
| 60 |
|
| 61 | if (sdata->vif.type != NL80211_IFTYPE_AP)
|
| 62 | return;
|
| 63 |
|
| 64 |
|
| 65 | lockdep_assert_wiphy(sdata->local->hw.wiphy);
|
| 66 |
|
| 67 | rcu_read_lock();
|
| 68 |
|
| 69 | list_for_each_entry_rcu(vlan, &sdata->u.ap.vlans, u.vlan.list)
|
| 70 | vlan->crypto_tx_tailroom_needed_cnt += delta;
|
| 71 |
|
| 72 | rcu_read_unlock();
|
| 73 | }
|
| 74 |
|
| 75 | static void increment_tailroom_need_count(struct ieee80211_sub_if_data *sdata)
|
| 76 | {
|
| 77 | |
| 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:
|
| 81 | *
|
| 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.
|
| 84 | *
|
| 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
|
| 87 | * off.
|
| 88 | *
|
| 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)
|
| 91 | *
|
| 92 | * Solution has been explained at
|
| 93 | * http://mid.gmane.org/[email protected]
|
| 94 |
|
| 95 |
|
| 96 | lockdep_assert_wiphy(sdata->local->hw.wiphy);
|
| 97 |
|
| 98 | update_vlan_tailroom_need_count(sdata, 1);
|
| 99 |
|
| 100 | if (!sdata->crypto_tx_tailroom_needed_cnt++) {
|
| 101 | |
| 102 | * Flush all XMIT packets currently using HW encryption or no
|
| 103 | * encryption at all if the count transition is from 0 -> 1.
|
| 104 |
|
| 105 | synchronize_net();
|
| 106 | }
|
| 107 | }
|
| 108 |
|
| 109 | static void decrease_tailroom_need_count(struct ieee80211_sub_if_data *sdata,
|
| 110 | int delta)
|
| 111 | {
|
| 112 | lockdep_assert_wiphy(sdata->local->hw.wiphy);
|
| 113 |
|
| 114 | WARN_ON_ONCE(sdata->crypto_tx_tailroom_needed_cnt < delta);
|
| 115 |
|
| 116 | update_vlan_tailroom_need_count(sdata, -delta);
|
| 117 | sdata->crypto_tx_tailroom_needed_cnt -= delta;
|
| 118 | }
|
| 119 |
|
| 120 | static int ieee80211_key_enable_hw_accel(struct ieee80211_key *key)
|
| 121 | {
|
| 122 | struct ieee80211_sub_if_data *sdata = key->sdata;
|
| 123 | struct sta_info *sta;
|
| 124 | int ret = -EOPNOTSUPP;
|
| 125 |
|
| 126 | might_sleep();
|
| 127 | lockdep_assert_wiphy(key->local->hw.wiphy);
|
| 128 |
|
| 129 | if (key->flags & KEY_FLAG_TAINTED) {
|
| 130 | |
| 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
|
| 135 | * it again later.
|
| 136 |
|
| 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);
|
| 142 |
|
| 143 | key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE;
|
| 144 | return -EINVAL;
|
| 145 | }
|
| 146 |
|
| 147 | if (!key->local->ops->set_key)
|
| 148 | goto out_unsupported;
|
| 149 |
|
| 150 | sta = key->sta;
|
| 151 |
|
| 152 | |
| 153 | * Allow installation of a per-STA GTK if per-STA GTK is supported
|
| 154 | * by the driver or the interface is a NAN Data interface (as
|
| 155 | * per-station GTKs are required to be supported if secure NAN is
|
| 156 | * supported).
|
| 157 |
|
| 158 | if (sta && !(key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE) &&
|
| 159 | !(ieee80211_hw_check(&key->local->hw, SUPPORTS_PER_STA_GTK) ||
|
| 160 | sdata->vif.type == NL80211_IFTYPE_NAN_DATA))
|
| 161 | goto out_unsupported;
|
| 162 |
|
| 163 | if (sta && !sta->uploaded)
|
| 164 | goto out_unsupported;
|
| 165 |
|
| 166 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
|
| 167 | |
| 168 | * The driver doesn't know anything about VLAN interfaces.
|
| 169 | * Hence, don't send GTKs for VLAN interfaces to the driver.
|
| 170 |
|
| 171 | if (!(key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
|
| 172 | ret = 1;
|
| 173 | goto out_unsupported;
|
| 174 | }
|
| 175 | }
|
| 176 |
|
| 177 | if (key->conf.link_id >= 0 && sdata->vif.active_links &&
|
| 178 | !(sdata->vif.active_links & BIT(key->conf.link_id)))
|
| 179 | return 0;
|
| 180 |
|
| 181 | ret = drv_set_key(key->local, SET_KEY, sdata,
|
| 182 | sta ? &sta->sta : NULL, &key->conf);
|
| 183 |
|
| 184 | if (!ret) {
|
| 185 | key->flags |= KEY_FLAG_UPLOADED_TO_HARDWARE;
|
| 186 |
|
| 187 | if (!(key->conf.flags & (IEEE80211_KEY_FLAG_GENERATE_MMIC |
|
| 188 | IEEE80211_KEY_FLAG_PUT_MIC_SPACE |
|
| 189 | IEEE80211_KEY_FLAG_RESERVE_TAILROOM)))
|
| 190 | decrease_tailroom_need_count(sdata, 1);
|
| 191 |
|
| 192 | WARN_ON((key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE) &&
|
| 193 | (key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV));
|
| 194 |
|
| 195 | WARN_ON((key->conf.flags & IEEE80211_KEY_FLAG_PUT_MIC_SPACE) &&
|
| 196 | (key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC));
|
| 197 |
|
| 198 | return 0;
|
| 199 | }
|
| 200 |
|
| 201 | if (ret != -ENOSPC && ret != -EOPNOTSUPP && ret != 1)
|
| 202 | sdata_err(sdata,
|
| 203 | "failed to set key (%d, %pM) to hardware (%d)\n",
|
| 204 | key->conf.keyidx,
|
| 205 | sta ? sta->sta.addr : bcast_addr, ret);
|
| 206 |
|
| 207 | out_unsupported:
|
| 208 | switch (key->conf.cipher) {
|
| 209 | case WLAN_CIPHER_SUITE_WEP40:
|
| 210 | case WLAN_CIPHER_SUITE_WEP104:
|
| 211 | case WLAN_CIPHER_SUITE_TKIP:
|
| 212 | case WLAN_CIPHER_SUITE_CCMP:
|
| 213 | case WLAN_CIPHER_SUITE_CCMP_256:
|
| 214 | case WLAN_CIPHER_SUITE_GCMP:
|
| 215 | case WLAN_CIPHER_SUITE_GCMP_256:
|
| 216 | case WLAN_CIPHER_SUITE_AES_CMAC:
|
| 217 | case WLAN_CIPHER_SUITE_BIP_CMAC_256:
|
| 218 | case WLAN_CIPHER_SUITE_BIP_GMAC_128:
|
| 219 | case WLAN_CIPHER_SUITE_BIP_GMAC_256:
|
| 220 |
|
| 221 | if (ret == 1)
|
| 222 | return 0;
|
| 223 | if (ieee80211_hw_check(&key->local->hw, SW_CRYPTO_CONTROL))
|
| 224 | return -EINVAL;
|
| 225 | return 0;
|
| 226 | default:
|
| 227 | return -EINVAL;
|
| 228 | }
|
| 229 | }
|
| 230 |
|
| 231 | static void ieee80211_key_disable_hw_accel(struct ieee80211_key *key)
|
| 232 | {
|
| 233 | struct ieee80211_sub_if_data *sdata;
|
| 234 | struct sta_info *sta;
|
| 235 | int ret;
|
| 236 |
|
| 237 | might_sleep();
|
| 238 |
|
| 239 | if (!key || !key->local->ops->set_key)
|
| 240 | return;
|
| 241 |
|
| 242 | if (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
|
| 243 | return;
|
| 244 |
|
| 245 | sta = key->sta;
|
| 246 | sdata = key->sdata;
|
| 247 |
|
| 248 | lockdep_assert_wiphy(key->local->hw.wiphy);
|
| 249 |
|
| 250 | if (key->conf.link_id >= 0 && sdata->vif.active_links &&
|
| 251 | !(sdata->vif.active_links & BIT(key->conf.link_id)))
|
| 252 | return;
|
| 253 |
|
| 254 | if (!(key->conf.flags & (IEEE80211_KEY_FLAG_GENERATE_MMIC |
|
| 255 | IEEE80211_KEY_FLAG_PUT_MIC_SPACE |
|
| 256 | IEEE80211_KEY_FLAG_RESERVE_TAILROOM)))
|
| 257 | increment_tailroom_need_count(sdata);
|
| 258 |
|
| 259 | key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE;
|
| 260 | ret = drv_set_key(key->local, DISABLE_KEY, sdata,
|
| 261 | sta ? &sta->sta : NULL, &key->conf);
|
| 262 |
|
| 263 | if (ret)
|
| 264 | sdata_err(sdata,
|
| 265 | "failed to remove key (%d, %pM) from hardware (%d)\n",
|
| 266 | key->conf.keyidx,
|
| 267 | sta ? sta->sta.addr : bcast_addr, ret);
|
| 268 | }
|
| 269 |
|
| 270 | static int _ieee80211_set_tx_key(struct ieee80211_key *key, bool force)
|
| 271 | {
|
| 272 | struct sta_info *sta = key->sta;
|
| 273 | struct ieee80211_local *local = key->local;
|
| 274 |
|
| 275 | lockdep_assert_wiphy(local->hw.wiphy);
|
| 276 |
|
| 277 | set_sta_flag(sta, WLAN_STA_USES_ENCRYPTION);
|
| 278 |
|
| 279 | sta->ptk_idx = key->conf.keyidx;
|
| 280 |
|
| 281 | if (force || !ieee80211_hw_check(&local->hw, AMPDU_KEYBORDER_SUPPORT))
|
| 282 | clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
|
| 283 | ieee80211_check_fast_xmit(sta);
|
| 284 |
|
| 285 | return 0;
|
| 286 | }
|
| 287 |
|
| 288 | int ieee80211_set_tx_key(struct ieee80211_key *key)
|
| 289 | {
|
| 290 | return _ieee80211_set_tx_key(key, false);
|
| 291 | }
|
| 292 |
|
| 293 | static void ieee80211_pairwise_rekey(struct ieee80211_key *old,
|
| 294 | struct ieee80211_key *new)
|
| 295 | {
|
| 296 | struct ieee80211_local *local = new->local;
|
| 297 | struct sta_info *sta = new->sta;
|
| 298 | int i;
|
| 299 |
|
| 300 | lockdep_assert_wiphy(local->hw.wiphy);
|
| 301 |
|
| 302 | if (new->conf.flags & IEEE80211_KEY_FLAG_NO_AUTO_TX) {
|
| 303 |
|
| 304 |
|
| 305 | if (sta->ptk_idx != INVALID_PTK_KEYIDX &&
|
| 306 | !ieee80211_hw_check(&local->hw, AMPDU_KEYBORDER_SUPPORT)) {
|
| 307 | |
| 308 | * mix MPDUs with different keyIDs within one A-MPDU.
|
| 309 | * Tear down running Tx aggregation sessions and block
|
| 310 | * new Rx/Tx aggregation requests during rekey to
|
| 311 | * ensure there are no A-MPDUs when the driver is not
|
| 312 | * supporting A-MPDU key borders. (Blocking Tx only
|
| 313 | * would be sufficient but WLAN_STA_BLOCK_BA gets the
|
| 314 | * job done for the few ms we need it.)
|
| 315 |
|
| 316 | set_sta_flag(sta, WLAN_STA_BLOCK_BA);
|
| 317 | for (i = 0; i < IEEE80211_NUM_TIDS; i++)
|
| 318 | __ieee80211_stop_tx_ba_session(sta, i,
|
| 319 | AGG_STOP_LOCAL_REQUEST);
|
| 320 | }
|
| 321 | } else if (old) {
|
| 322 | |
| 323 | * Aggregation sessions are OK when running on SW crypto.
|
| 324 | * A broken remote STA may cause issues not observed with HW
|
| 325 | * crypto, though.
|
| 326 |
|
| 327 | if (!(old->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
|
| 328 | return;
|
| 329 |
|
| 330 |
|
| 331 | old->flags |= KEY_FLAG_TAINTED;
|
| 332 | ieee80211_clear_fast_xmit(sta);
|
| 333 | if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) {
|
| 334 | set_sta_flag(sta, WLAN_STA_BLOCK_BA);
|
| 335 | ieee80211_sta_tear_down_BA_sessions(sta,
|
| 336 | AGG_STOP_LOCAL_REQUEST);
|
| 337 | }
|
| 338 | if (!wiphy_ext_feature_isset(local->hw.wiphy,
|
| 339 | NL80211_EXT_FEATURE_CAN_REPLACE_PTK0)) {
|
| 340 | pr_warn_ratelimited("Rekeying PTK for STA %pM but driver can't safely do that.",
|
| 341 | sta->sta.addr);
|
| 342 | |
| 343 | * the clear text leaks and freezes.
|
| 344 |
|
| 345 | ieee80211_flush_queues(local, old->sdata, false);
|
| 346 | }
|
| 347 | }
|
| 348 | }
|
| 349 |
|
| 350 | static void __ieee80211_set_default_key(struct ieee80211_link_data *link,
|
| 351 | int idx, bool uni, bool multi)
|
| 352 | {
|
| 353 | struct ieee80211_sub_if_data *sdata = link->sdata;
|
| 354 | struct ieee80211_key *key = NULL;
|
| 355 |
|
| 356 | lockdep_assert_wiphy(sdata->local->hw.wiphy);
|
| 357 |
|
| 358 | if (idx >= 0 && idx < NUM_DEFAULT_KEYS) {
|
| 359 | key = wiphy_dereference(sdata->local->hw.wiphy,
|
| 360 | sdata->keys[idx]);
|
| 361 | if (!key)
|
| 362 | key = wiphy_dereference(sdata->local->hw.wiphy,
|
| 363 | link->gtk[idx]);
|
| 364 | }
|
| 365 |
|
| 366 | if (uni) {
|
| 367 | rcu_assign_pointer(sdata->default_unicast_key, key);
|
| 368 | ieee80211_check_fast_xmit_iface(sdata);
|
| 369 | if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
|
| 370 | drv_set_default_unicast_key(sdata->local, sdata, idx);
|
| 371 | }
|
| 372 |
|
| 373 | if (multi)
|
| 374 | rcu_assign_pointer(link->default_multicast_key, key);
|
| 375 |
|
| 376 | ieee80211_debugfs_key_update_default(sdata);
|
| 377 | }
|
| 378 |
|
| 379 | void ieee80211_set_default_key(struct ieee80211_link_data *link, int idx,
|
| 380 | bool uni, bool multi)
|
| 381 | {
|
| 382 | lockdep_assert_wiphy(link->sdata->local->hw.wiphy);
|
| 383 |
|
| 384 | __ieee80211_set_default_key(link, idx, uni, multi);
|
| 385 | }
|
| 386 |
|
| 387 | static void
|
| 388 | __ieee80211_set_default_mgmt_key(struct ieee80211_link_data *link, int idx)
|
| 389 | {
|
| 390 | struct ieee80211_sub_if_data *sdata = link->sdata;
|
| 391 | struct ieee80211_key *key = NULL;
|
| 392 |
|
| 393 | lockdep_assert_wiphy(sdata->local->hw.wiphy);
|
| 394 |
|
| 395 | if (idx >= NUM_DEFAULT_KEYS &&
|
| 396 | idx < NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS)
|
| 397 | key = wiphy_dereference(sdata->local->hw.wiphy,
|
| 398 | link->gtk[idx]);
|
| 399 |
|
| 400 | rcu_assign_pointer(link->default_mgmt_key, key);
|
| 401 |
|
| 402 | ieee80211_debugfs_key_update_default(sdata);
|
| 403 | }
|
| 404 |
|
| 405 | void ieee80211_set_default_mgmt_key(struct ieee80211_link_data *link,
|
| 406 | int idx)
|
| 407 | {
|
| 408 | lockdep_assert_wiphy(link->sdata->local->hw.wiphy);
|
| 409 |
|
| 410 | __ieee80211_set_default_mgmt_key(link, idx);
|
| 411 | }
|
| 412 |
|
| 413 | static void
|
| 414 | __ieee80211_set_default_beacon_key(struct ieee80211_link_data *link, int idx)
|
| 415 | {
|
| 416 | struct ieee80211_sub_if_data *sdata = link->sdata;
|
| 417 | struct ieee80211_key *key = NULL;
|
| 418 |
|
| 419 | lockdep_assert_wiphy(sdata->local->hw.wiphy);
|
| 420 |
|
| 421 | if (idx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS &&
|
| 422 | idx < NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS +
|
| 423 | NUM_DEFAULT_BEACON_KEYS)
|
| 424 | key = wiphy_dereference(sdata->local->hw.wiphy,
|
| 425 | link->gtk[idx]);
|
| 426 |
|
| 427 | rcu_assign_pointer(link->default_beacon_key, key);
|
| 428 |
|
| 429 | ieee80211_debugfs_key_update_default(sdata);
|
| 430 | }
|
| 431 |
|
| 432 | void ieee80211_set_default_beacon_key(struct ieee80211_link_data *link,
|
| 433 | int idx)
|
| 434 | {
|
| 435 | lockdep_assert_wiphy(link->sdata->local->hw.wiphy);
|
| 436 |
|
| 437 | __ieee80211_set_default_beacon_key(link, idx);
|
| 438 | }
|
| 439 |
|
| 440 | static int ieee80211_key_replace(struct ieee80211_sub_if_data *sdata,
|
| 441 | struct ieee80211_link_data *link,
|
| 442 | struct sta_info *sta,
|
| 443 | bool pairwise,
|
| 444 | struct ieee80211_key *old,
|
| 445 | struct ieee80211_key *new)
|
| 446 | {
|
| 447 | struct link_sta_info *link_sta = sta ? &sta->deflink : NULL;
|
| 448 | int link_id;
|
| 449 | int idx;
|
| 450 | int ret = 0;
|
| 451 | bool defunikey, defmultikey, defmgmtkey, defbeaconkey;
|
| 452 | bool is_wep;
|
| 453 |
|
| 454 | lockdep_assert_wiphy(sdata->local->hw.wiphy);
|
| 455 |
|
| 456 |
|
| 457 | if (WARN_ON(!new && !old))
|
| 458 | return 0;
|
| 459 |
|
| 460 | if (new) {
|
| 461 | idx = new->conf.keyidx;
|
| 462 | is_wep = new->conf.cipher == WLAN_CIPHER_SUITE_WEP40 ||
|
| 463 | new->conf.cipher == WLAN_CIPHER_SUITE_WEP104;
|
| 464 | link_id = new->conf.link_id;
|
| 465 | } else {
|
| 466 | idx = old->conf.keyidx;
|
| 467 | is_wep = old->conf.cipher == WLAN_CIPHER_SUITE_WEP40 ||
|
| 468 | old->conf.cipher == WLAN_CIPHER_SUITE_WEP104;
|
| 469 | link_id = old->conf.link_id;
|
| 470 | }
|
| 471 |
|
| 472 | if (WARN(old && old->conf.link_id != link_id,
|
| 473 | "old link ID %d doesn't match new link ID %d\n",
|
| 474 | old->conf.link_id, link_id))
|
| 475 | return -EINVAL;
|
| 476 |
|
| 477 | if (link_id >= 0) {
|
| 478 | if (!link) {
|
| 479 | link = sdata_dereference(sdata->link[link_id], sdata);
|
| 480 | if (!link)
|
| 481 | return -ENOLINK;
|
| 482 | }
|
| 483 |
|
| 484 | if (sta) {
|
| 485 | link_sta = rcu_dereference_protected(sta->link[link_id],
|
| 486 | lockdep_is_held(&sta->local->hw.wiphy->mtx));
|
| 487 | if (!link_sta)
|
| 488 | return -ENOLINK;
|
| 489 | }
|
| 490 | } else {
|
| 491 | link = &sdata->deflink;
|
| 492 | }
|
| 493 |
|
| 494 | if ((is_wep || pairwise) && idx >= NUM_DEFAULT_KEYS)
|
| 495 | return -EINVAL;
|
| 496 |
|
| 497 | WARN_ON(new && old && new->conf.keyidx != old->conf.keyidx);
|
| 498 |
|
| 499 | if (new && sta && pairwise) {
|
| 500 | |
| 501 | * old is still NULL for the first rekey.
|
| 502 |
|
| 503 | ieee80211_pairwise_rekey(old, new);
|
| 504 | }
|
| 505 |
|
| 506 | if (old) {
|
| 507 | if (old->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) {
|
| 508 | ieee80211_key_disable_hw_accel(old);
|
| 509 |
|
| 510 | if (new)
|
| 511 | ret = ieee80211_key_enable_hw_accel(new);
|
| 512 | }
|
| 513 | } else {
|
| 514 | if (!new->local->wowlan) {
|
| 515 | ret = ieee80211_key_enable_hw_accel(new);
|
| 516 | } else if (link_id < 0 || !sdata->vif.active_links ||
|
| 517 | BIT(link_id) & sdata->vif.active_links) {
|
| 518 | new->flags |= KEY_FLAG_UPLOADED_TO_HARDWARE;
|
| 519 | if (!(new->conf.flags & (IEEE80211_KEY_FLAG_GENERATE_MMIC |
|
| 520 | IEEE80211_KEY_FLAG_PUT_MIC_SPACE |
|
| 521 | IEEE80211_KEY_FLAG_RESERVE_TAILROOM)))
|
| 522 | decrease_tailroom_need_count(sdata, 1);
|
| 523 | }
|
| 524 | }
|
| 525 |
|
| 526 | if (ret)
|
| 527 | return ret;
|
| 528 |
|
| 529 | if (new)
|
| 530 | list_add_tail_rcu(&new->list, &sdata->key_list);
|
| 531 |
|
| 532 | if (sta) {
|
| 533 | if (pairwise) {
|
| 534 | rcu_assign_pointer(sta->ptk[idx], new);
|
| 535 | if (new &&
|
| 536 | !(new->conf.flags & IEEE80211_KEY_FLAG_NO_AUTO_TX))
|
| 537 | _ieee80211_set_tx_key(new, true);
|
| 538 | } else {
|
| 539 | rcu_assign_pointer(link_sta->gtk[idx], new);
|
| 540 | }
|
| 541 | |
| 542 | * Still triggers unnecessary when using Extended Key ID
|
| 543 | * and installing the second key ID the first time.
|
| 544 |
|
| 545 | if (new && !old)
|
| 546 | ieee80211_check_fast_rx(sta);
|
| 547 | } else {
|
| 548 | defunikey = old &&
|
| 549 | old == wiphy_dereference(sdata->local->hw.wiphy,
|
| 550 | sdata->default_unicast_key);
|
| 551 | defmultikey = old &&
|
| 552 | old == wiphy_dereference(sdata->local->hw.wiphy,
|
| 553 | link->default_multicast_key);
|
| 554 | defmgmtkey = old &&
|
| 555 | old == wiphy_dereference(sdata->local->hw.wiphy,
|
| 556 | link->default_mgmt_key);
|
| 557 | defbeaconkey = old &&
|
| 558 | old == wiphy_dereference(sdata->local->hw.wiphy,
|
| 559 | link->default_beacon_key);
|
| 560 |
|
| 561 | if (defunikey && !new)
|
| 562 | __ieee80211_set_default_key(link, -1, true, false);
|
| 563 | if (defmultikey && !new)
|
| 564 | __ieee80211_set_default_key(link, -1, false, true);
|
| 565 | if (defmgmtkey && !new)
|
| 566 | __ieee80211_set_default_mgmt_key(link, -1);
|
| 567 | if (defbeaconkey && !new)
|
| 568 | __ieee80211_set_default_beacon_key(link, -1);
|
| 569 |
|
| 570 | if (is_wep || pairwise)
|
| 571 | rcu_assign_pointer(sdata->keys[idx], new);
|
| 572 | else
|
| 573 | rcu_assign_pointer(link->gtk[idx], new);
|
| 574 |
|
| 575 | if (defunikey && new)
|
| 576 | __ieee80211_set_default_key(link, new->conf.keyidx,
|
| 577 | true, false);
|
| 578 | if (defmultikey && new)
|
| 579 | __ieee80211_set_default_key(link, new->conf.keyidx,
|
| 580 | false, true);
|
| 581 | if (defmgmtkey && new)
|
| 582 | __ieee80211_set_default_mgmt_key(link,
|
| 583 | new->conf.keyidx);
|
| 584 | if (defbeaconkey && new)
|
| 585 | __ieee80211_set_default_beacon_key(link,
|
| 586 | new->conf.keyidx);
|
| 587 | }
|
| 588 |
|
| 589 | if (old)
|
| 590 | list_del_rcu(&old->list);
|
| 591 |
|
| 592 | return 0;
|
| 593 | }
|
| 594 |
|
| 595 | struct ieee80211_key *
|
| 596 | ieee80211_key_alloc(u32 cipher, int idx, size_t key_len,
|
| 597 | const u8 *key_data,
|
| 598 | size_t seq_len, const u8 *seq)
|
| 599 | {
|
| 600 | struct ieee80211_key *key;
|
| 601 | int i, j, err;
|
| 602 |
|
| 603 | if (WARN_ON(idx < 0 ||
|
| 604 | idx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS +
|
| 605 | NUM_DEFAULT_BEACON_KEYS))
|
| 606 | return ERR_PTR(-EINVAL);
|
| 607 |
|
| 608 | key = kzalloc(sizeof(struct ieee80211_key) + key_len, GFP_KERNEL);
|
| 609 | if (!key)
|
| 610 | return ERR_PTR(-ENOMEM);
|
| 611 |
|
| 612 | |
| 613 | * Default to software encryption; we'll later upload the
|
| 614 | * key to the hardware if possible.
|
| 615 |
|
| 616 | key->conf.flags = 0;
|
| 617 | key->flags = 0;
|
| 618 |
|
| 619 | key->conf.link_id = -1;
|
| 620 | key->conf.cipher = cipher;
|
| 621 | key->conf.keyidx = idx;
|
| 622 | key->conf.keylen = key_len;
|
| 623 | switch (cipher) {
|
| 624 | case WLAN_CIPHER_SUITE_WEP40:
|
| 625 | case WLAN_CIPHER_SUITE_WEP104:
|
| 626 | key->conf.iv_len = IEEE80211_WEP_IV_LEN;
|
| 627 | key->conf.icv_len = IEEE80211_WEP_ICV_LEN;
|
| 628 | break;
|
| 629 | case WLAN_CIPHER_SUITE_TKIP:
|
| 630 | key->conf.iv_len = IEEE80211_TKIP_IV_LEN;
|
| 631 | key->conf.icv_len = IEEE80211_TKIP_ICV_LEN;
|
| 632 | if (seq) {
|
| 633 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
|
| 634 | key->u.tkip.rx[i].iv32 =
|
| 635 | get_unaligned_le32(&seq[2]);
|
| 636 | key->u.tkip.rx[i].iv16 =
|
| 637 | get_unaligned_le16(seq);
|
| 638 | }
|
| 639 | }
|
| 640 | spin_lock_init(&key->u.tkip.txlock);
|
| 641 | break;
|
| 642 | case WLAN_CIPHER_SUITE_CCMP:
|
| 643 | key->conf.iv_len = IEEE80211_CCMP_HDR_LEN;
|
| 644 | key->conf.icv_len = IEEE80211_CCMP_MIC_LEN;
|
| 645 | if (seq) {
|
| 646 | for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++)
|
| 647 | for (j = 0; j < IEEE80211_CCMP_PN_LEN; j++)
|
| 648 | key->u.ccmp.rx_pn[i][j] =
|
| 649 | seq[IEEE80211_CCMP_PN_LEN - j - 1];
|
| 650 | }
|
| 651 | |
| 652 | * Initialize AES key state here as an optimization so that
|
| 653 | * it does not need to be initialized for every packet.
|
| 654 |
|
| 655 | key->u.ccmp.tfm = ieee80211_aes_key_setup_encrypt(
|
| 656 | key_data, key_len, IEEE80211_CCMP_MIC_LEN);
|
| 657 | if (IS_ERR(key->u.ccmp.tfm)) {
|
| 658 | err = PTR_ERR(key->u.ccmp.tfm);
|
| 659 | kfree(key);
|
| 660 | return ERR_PTR(err);
|
| 661 | }
|
| 662 | break;
|
| 663 | case WLAN_CIPHER_SUITE_CCMP_256:
|
| 664 | key->conf.iv_len = IEEE80211_CCMP_256_HDR_LEN;
|
| 665 | key->conf.icv_len = IEEE80211_CCMP_256_MIC_LEN;
|
| 666 | for (i = 0; seq && i < IEEE80211_NUM_TIDS + 1; i++)
|
| 667 | for (j = 0; j < IEEE80211_CCMP_256_PN_LEN; j++)
|
| 668 | key->u.ccmp.rx_pn[i][j] =
|
| 669 | seq[IEEE80211_CCMP_256_PN_LEN - j - 1];
|
| 670 | |
| 671 | * it does not need to be initialized for every packet.
|
| 672 |
|
| 673 | key->u.ccmp.tfm = ieee80211_aes_key_setup_encrypt(
|
| 674 | key_data, key_len, IEEE80211_CCMP_256_MIC_LEN);
|
| 675 | if (IS_ERR(key->u.ccmp.tfm)) {
|
| 676 | err = PTR_ERR(key->u.ccmp.tfm);
|
| 677 | kfree(key);
|
| 678 | return ERR_PTR(err);
|
| 679 | }
|
| 680 | break;
|
| 681 | case WLAN_CIPHER_SUITE_AES_CMAC:
|
| 682 | case WLAN_CIPHER_SUITE_BIP_CMAC_256:
|
| 683 | key->conf.iv_len = 0;
|
| 684 | if (cipher == WLAN_CIPHER_SUITE_AES_CMAC)
|
| 685 | key->conf.icv_len = sizeof(struct ieee80211_mmie);
|
| 686 | else
|
| 687 | key->conf.icv_len = sizeof(struct ieee80211_mmie_16);
|
| 688 | if (seq)
|
| 689 | for (j = 0; j < IEEE80211_CMAC_PN_LEN; j++)
|
| 690 | key->u.aes_cmac.rx_pn[j] =
|
| 691 | seq[IEEE80211_CMAC_PN_LEN - j - 1];
|
| 692 | |
| 693 | * Initialize AES key state here as an optimization so that
|
| 694 | * it does not need to be initialized for every packet.
|
| 695 |
|
| 696 | err = aes_cmac_preparekey(&key->u.aes_cmac.key, key_data,
|
| 697 | key_len);
|
| 698 | if (err) {
|
| 699 | kfree(key);
|
| 700 | return ERR_PTR(err);
|
| 701 | }
|
| 702 | break;
|
| 703 | case WLAN_CIPHER_SUITE_BIP_GMAC_128:
|
| 704 | case WLAN_CIPHER_SUITE_BIP_GMAC_256:
|
| 705 | key->conf.iv_len = 0;
|
| 706 | key->conf.icv_len = sizeof(struct ieee80211_mmie_16);
|
| 707 | if (seq)
|
| 708 | for (j = 0; j < IEEE80211_GMAC_PN_LEN; j++)
|
| 709 | key->u.aes_gmac.rx_pn[j] =
|
| 710 | seq[IEEE80211_GMAC_PN_LEN - j - 1];
|
| 711 | |
| 712 | * it does not need to be initialized for every packet.
|
| 713 |
|
| 714 | key->u.aes_gmac.tfm =
|
| 715 | ieee80211_aes_gmac_key_setup(key_data, key_len);
|
| 716 | if (IS_ERR(key->u.aes_gmac.tfm)) {
|
| 717 | err = PTR_ERR(key->u.aes_gmac.tfm);
|
| 718 | kfree(key);
|
| 719 | return ERR_PTR(err);
|
| 720 | }
|
| 721 | break;
|
| 722 | case WLAN_CIPHER_SUITE_GCMP:
|
| 723 | case WLAN_CIPHER_SUITE_GCMP_256:
|
| 724 | key->conf.iv_len = IEEE80211_GCMP_HDR_LEN;
|
| 725 | key->conf.icv_len = IEEE80211_GCMP_MIC_LEN;
|
| 726 | for (i = 0; seq && i < IEEE80211_NUM_TIDS + 1; i++)
|
| 727 | for (j = 0; j < IEEE80211_GCMP_PN_LEN; j++)
|
| 728 | key->u.gcmp.rx_pn[i][j] =
|
| 729 | seq[IEEE80211_GCMP_PN_LEN - j - 1];
|
| 730 | |
| 731 | * it does not need to be initialized for every packet.
|
| 732 |
|
| 733 | key->u.gcmp.tfm = ieee80211_aes_gcm_key_setup_encrypt(key_data,
|
| 734 | key_len);
|
| 735 | if (IS_ERR(key->u.gcmp.tfm)) {
|
| 736 | err = PTR_ERR(key->u.gcmp.tfm);
|
| 737 | kfree(key);
|
| 738 | return ERR_PTR(err);
|
| 739 | }
|
| 740 | break;
|
| 741 | }
|
| 742 | memcpy(key->conf.key, key_data, key_len);
|
| 743 | INIT_LIST_HEAD(&key->list);
|
| 744 |
|
| 745 | return key;
|
| 746 | }
|
| 747 |
|
| 748 | static void ieee80211_key_free_common(struct ieee80211_key *key)
|
| 749 | {
|
| 750 | switch (key->conf.cipher) {
|
| 751 | case WLAN_CIPHER_SUITE_CCMP:
|
| 752 | case WLAN_CIPHER_SUITE_CCMP_256:
|
| 753 | ieee80211_aes_key_free(key->u.ccmp.tfm);
|
| 754 | break;
|
| 755 | case WLAN_CIPHER_SUITE_BIP_GMAC_128:
|
| 756 | case WLAN_CIPHER_SUITE_BIP_GMAC_256:
|
| 757 | ieee80211_aes_gmac_key_free(key->u.aes_gmac.tfm);
|
| 758 | break;
|
| 759 | case WLAN_CIPHER_SUITE_GCMP:
|
| 760 | case WLAN_CIPHER_SUITE_GCMP_256:
|
| 761 | ieee80211_aes_gcm_key_free(key->u.gcmp.tfm);
|
| 762 | break;
|
| 763 | }
|
| 764 | kfree_sensitive(key);
|
| 765 | }
|
| 766 |
|
| 767 | static void __ieee80211_key_destroy(struct ieee80211_key *key,
|
| 768 | bool delay_tailroom)
|
| 769 | {
|
| 770 | if (key->local) {
|
| 771 | struct ieee80211_sub_if_data *sdata = key->sdata;
|
| 772 |
|
| 773 | ieee80211_debugfs_key_remove(key);
|
| 774 |
|
| 775 | if (delay_tailroom) {
|
| 776 |
|
| 777 | sdata->crypto_tx_tailroom_pending_dec++;
|
| 778 | wiphy_delayed_work_queue(sdata->local->hw.wiphy,
|
| 779 | &sdata->dec_tailroom_needed_wk,
|
| 780 | HZ / 2);
|
| 781 | } else {
|
| 782 | decrease_tailroom_need_count(sdata, 1);
|
| 783 | }
|
| 784 | }
|
| 785 |
|
| 786 | ieee80211_key_free_common(key);
|
| 787 | }
|
| 788 |
|
| 789 | static void ieee80211_key_destroy(struct ieee80211_key *key,
|
| 790 | bool delay_tailroom)
|
| 791 | {
|
| 792 | if (!key)
|
| 793 | return;
|
| 794 |
|
| 795 | |
| 796 | * Synchronize so the TX path and rcu key iterators
|
| 797 | * can no longer be using this key before we free/remove it.
|
| 798 |
|
| 799 | synchronize_net();
|
| 800 |
|
| 801 | __ieee80211_key_destroy(key, delay_tailroom);
|
| 802 | }
|
| 803 |
|
| 804 | void ieee80211_key_free_unused(struct ieee80211_key *key)
|
| 805 | {
|
| 806 | if (!key)
|
| 807 | return;
|
| 808 |
|
| 809 | WARN_ON(key->sdata || key->local);
|
| 810 | ieee80211_key_free_common(key);
|
| 811 | }
|
| 812 |
|
| 813 | static bool ieee80211_key_identical(struct ieee80211_sub_if_data *sdata,
|
| 814 | struct ieee80211_key *old,
|
| 815 | struct ieee80211_key *new)
|
| 816 | {
|
| 817 | u8 tkip_old[WLAN_KEY_LEN_TKIP], tkip_new[WLAN_KEY_LEN_TKIP];
|
| 818 | u8 *tk_old, *tk_new;
|
| 819 |
|
| 820 | if (!old || new->conf.keylen != old->conf.keylen)
|
| 821 | return false;
|
| 822 |
|
| 823 | tk_old = old->conf.key;
|
| 824 | tk_new = new->conf.key;
|
| 825 |
|
| 826 | |
| 827 | * In station mode, don't compare the TX MIC key, as it's never used
|
| 828 | * and offloaded rekeying may not care to send it to the host. This
|
| 829 | * is the case in iwlwifi, for example.
|
| 830 |
|
| 831 | if (sdata->vif.type == NL80211_IFTYPE_STATION &&
|
| 832 | new->conf.cipher == WLAN_CIPHER_SUITE_TKIP &&
|
| 833 | new->conf.keylen == WLAN_KEY_LEN_TKIP &&
|
| 834 | !(new->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
|
| 835 | memcpy(tkip_old, tk_old, WLAN_KEY_LEN_TKIP);
|
| 836 | memcpy(tkip_new, tk_new, WLAN_KEY_LEN_TKIP);
|
| 837 | memset(tkip_old + NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY, 0, 8);
|
| 838 | memset(tkip_new + NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY, 0, 8);
|
| 839 | tk_old = tkip_old;
|
| 840 | tk_new = tkip_new;
|
| 841 | }
|
| 842 |
|
| 843 | return !crypto_memneq(tk_old, tk_new, new->conf.keylen);
|
| 844 | }
|
| 845 |
|
| 846 | int ieee80211_key_link(struct ieee80211_key *key,
|
| 847 | struct ieee80211_link_data *link,
|
| 848 | struct sta_info *sta)
|
| 849 | {
|
| 850 | struct ieee80211_sub_if_data *sdata = link->sdata;
|
| 851 | static atomic_t key_color = ATOMIC_INIT(0);
|
| 852 | struct ieee80211_key *old_key = NULL;
|
| 853 | int idx = key->conf.keyidx;
|
| 854 | bool pairwise = key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE;
|
| 855 | |
| 856 | * We want to delay tailroom updates only for station - in that
|
| 857 | * case it helps roaming speed, but in other cases it hurts and
|
| 858 | * can cause warnings to appear.
|
| 859 |
|
| 860 | bool delay_tailroom = sdata->vif.type == NL80211_IFTYPE_STATION;
|
| 861 | int ret;
|
| 862 |
|
| 863 | lockdep_assert_wiphy(sdata->local->hw.wiphy);
|
| 864 |
|
| 865 | if (sta && pairwise) {
|
| 866 | struct ieee80211_key *alt_key;
|
| 867 |
|
| 868 | old_key = wiphy_dereference(sdata->local->hw.wiphy,
|
| 869 | sta->ptk[idx]);
|
| 870 | alt_key = wiphy_dereference(sdata->local->hw.wiphy,
|
| 871 | sta->ptk[idx ^ 1]);
|
| 872 |
|
| 873 | |
| 874 | * The rekey code assumes that the old and new key are using
|
| 875 | * the same cipher. Enforce the assumption for pairwise keys.
|
| 876 | * NAN Data interfaces are exempt: Wi-Fi Aware v4.0 section 7.4
|
| 877 | * requires upgrading the ND-TKSA when a new NDP negotiates a
|
| 878 | * stronger cipher suite.
|
| 879 |
|
| 880 | if (sdata->vif.type != NL80211_IFTYPE_NAN_DATA &&
|
| 881 | ((alt_key && alt_key->conf.cipher != key->conf.cipher) ||
|
| 882 | (old_key && old_key->conf.cipher != key->conf.cipher))) {
|
| 883 | ret = -EOPNOTSUPP;
|
| 884 | goto out;
|
| 885 | }
|
| 886 | } else if (sta) {
|
| 887 | struct link_sta_info *link_sta = &sta->deflink;
|
| 888 | int link_id = key->conf.link_id;
|
| 889 |
|
| 890 | if (link_id >= 0) {
|
| 891 | link_sta = rcu_dereference_protected(sta->link[link_id],
|
| 892 | lockdep_is_held(&sta->local->hw.wiphy->mtx));
|
| 893 | if (!link_sta) {
|
| 894 | ret = -ENOLINK;
|
| 895 | goto out;
|
| 896 | }
|
| 897 | }
|
| 898 |
|
| 899 | old_key = wiphy_dereference(sdata->local->hw.wiphy,
|
| 900 | link_sta->gtk[idx]);
|
| 901 | } else {
|
| 902 | if (idx < NUM_DEFAULT_KEYS)
|
| 903 | old_key = wiphy_dereference(sdata->local->hw.wiphy,
|
| 904 | sdata->keys[idx]);
|
| 905 | if (!old_key)
|
| 906 | old_key = wiphy_dereference(sdata->local->hw.wiphy,
|
| 907 | link->gtk[idx]);
|
| 908 | }
|
| 909 |
|
| 910 |
|
| 911 | if (!pairwise) {
|
| 912 | if (old_key && old_key->conf.cipher != key->conf.cipher) {
|
| 913 | ret = -EOPNOTSUPP;
|
| 914 | goto out;
|
| 915 | }
|
| 916 | }
|
| 917 |
|
| 918 | |
| 919 | * Silently accept key re-installation without really installing the
|
| 920 | * new version of the key to avoid nonce reuse or replay issues.
|
| 921 |
|
| 922 | if (ieee80211_key_identical(sdata, old_key, key)) {
|
| 923 | ret = -EALREADY;
|
| 924 | goto out;
|
| 925 | }
|
| 926 |
|
| 927 | key->local = sdata->local;
|
| 928 | key->sdata = sdata;
|
| 929 | key->sta = sta;
|
| 930 |
|
| 931 | |
| 932 | * Assign a unique ID to every key so we can easily prevent mixed
|
| 933 | * key and fragment cache attacks.
|
| 934 |
|
| 935 | key->color = atomic_inc_return(&key_color);
|
| 936 |
|
| 937 |
|
| 938 | if (sta && sta->sta.spp_amsdu)
|
| 939 | key->conf.flags |= IEEE80211_KEY_FLAG_SPP_AMSDU;
|
| 940 |
|
| 941 | increment_tailroom_need_count(sdata);
|
| 942 |
|
| 943 | ret = ieee80211_key_replace(sdata, link, sta, pairwise, old_key, key);
|
| 944 |
|
| 945 | if (!ret) {
|
| 946 | ieee80211_debugfs_key_add(key);
|
| 947 | ieee80211_key_destroy(old_key, delay_tailroom);
|
| 948 | } else {
|
| 949 | ieee80211_key_free(key, delay_tailroom);
|
| 950 | }
|
| 951 |
|
| 952 | key = NULL;
|
| 953 |
|
| 954 | out:
|
| 955 | ieee80211_key_free_unused(key);
|
| 956 | return ret;
|
| 957 | }
|
| 958 |
|
| 959 | void ieee80211_key_free(struct ieee80211_key *key, bool delay_tailroom)
|
| 960 | {
|
| 961 | if (!key)
|
| 962 | return;
|
| 963 |
|
| 964 | |
| 965 | * Replace key with nothingness if it was ever used.
|
| 966 |
|
| 967 | if (key->sdata)
|
| 968 | ieee80211_key_replace(key->sdata, NULL, key->sta,
|
| 969 | key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE,
|
| 970 | key, NULL);
|
| 971 | ieee80211_key_destroy(key, delay_tailroom);
|
| 972 | }
|
| 973 |
|
| 974 | void ieee80211_reenable_keys(struct ieee80211_sub_if_data *sdata)
|
| 975 | {
|
| 976 | struct ieee80211_key *key;
|
| 977 | struct ieee80211_sub_if_data *vlan;
|
| 978 |
|
| 979 | lockdep_assert_wiphy(sdata->local->hw.wiphy);
|
| 980 |
|
| 981 | sdata->crypto_tx_tailroom_needed_cnt = 0;
|
| 982 | sdata->crypto_tx_tailroom_pending_dec = 0;
|
| 983 |
|
| 984 | if (sdata->vif.type == NL80211_IFTYPE_AP) {
|
| 985 | list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) {
|
| 986 | vlan->crypto_tx_tailroom_needed_cnt = 0;
|
| 987 | vlan->crypto_tx_tailroom_pending_dec = 0;
|
| 988 | }
|
| 989 | }
|
| 990 |
|
| 991 | if (ieee80211_sdata_running(sdata)) {
|
| 992 | list_for_each_entry(key, &sdata->key_list, list) {
|
| 993 | if (!(key->flags & KEY_FLAG_TAINTED))
|
| 994 | increment_tailroom_need_count(sdata);
|
| 995 | ieee80211_key_enable_hw_accel(key);
|
| 996 | }
|
| 997 | }
|
| 998 | }
|
| 999 |
|
| 1000 | static void
|
| 1001 | ieee80211_key_iter(struct ieee80211_hw *hw,
|
| 1002 | struct ieee80211_vif *vif,
|
| 1003 | struct ieee80211_key *key,
|
| 1004 | void (*iter)(struct ieee80211_hw *hw,
|
| 1005 | struct ieee80211_vif *vif,
|
| 1006 | struct ieee80211_sta *sta,
|
| 1007 | struct ieee80211_key_conf *key,
|
| 1008 | void *data),
|
| 1009 | void *iter_data)
|
| 1010 | {
|
| 1011 |
|
| 1012 | if (key->sta && key->sta->removed)
|
| 1013 | return;
|
| 1014 | if (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
|
| 1015 | return;
|
| 1016 | iter(hw, vif, key->sta ? &key->sta->sta : NULL,
|
| 1017 | &key->conf, iter_data);
|
| 1018 | }
|
| 1019 |
|
| 1020 | void ieee80211_iter_keys(struct ieee80211_hw *hw,
|
| 1021 | struct ieee80211_vif *vif,
|
| 1022 | void (*iter)(struct ieee80211_hw *hw,
|
| 1023 | struct ieee80211_vif *vif,
|
| 1024 | struct ieee80211_sta *sta,
|
| 1025 | struct ieee80211_key_conf *key,
|
| 1026 | void *data),
|
| 1027 | void *iter_data)
|
| 1028 | {
|
| 1029 | struct ieee80211_local *local = hw_to_local(hw);
|
| 1030 | struct ieee80211_key *key, *tmp;
|
| 1031 | struct ieee80211_sub_if_data *sdata;
|
| 1032 |
|
| 1033 | lockdep_assert_wiphy(hw->wiphy);
|
| 1034 |
|
| 1035 | if (vif) {
|
| 1036 | sdata = vif_to_sdata(vif);
|
| 1037 | list_for_each_entry_safe(key, tmp, &sdata->key_list, list)
|
| 1038 | ieee80211_key_iter(hw, vif, key, iter, iter_data);
|
| 1039 | } else {
|
| 1040 | list_for_each_entry(sdata, &local->interfaces, list)
|
| 1041 | list_for_each_entry_safe(key, tmp,
|
| 1042 | &sdata->key_list, list)
|
| 1043 | ieee80211_key_iter(hw, &sdata->vif, key,
|
| 1044 | iter, iter_data);
|
| 1045 | }
|
| 1046 | }
|
| 1047 | EXPORT_SYMBOL(ieee80211_iter_keys);
|
| 1048 |
|
| 1049 | static void
|
| 1050 | _ieee80211_iter_keys_rcu(struct ieee80211_hw *hw,
|
| 1051 | struct ieee80211_sub_if_data *sdata,
|
| 1052 | void (*iter)(struct ieee80211_hw *hw,
|
| 1053 | struct ieee80211_vif *vif,
|
| 1054 | struct ieee80211_sta *sta,
|
| 1055 | struct ieee80211_key_conf *key,
|
| 1056 | void *data),
|
| 1057 | void *iter_data)
|
| 1058 | {
|
| 1059 | struct ieee80211_key *key;
|
| 1060 |
|
| 1061 | list_for_each_entry_rcu(key, &sdata->key_list, list)
|
| 1062 | ieee80211_key_iter(hw, &sdata->vif, key, iter, iter_data);
|
| 1063 | }
|
| 1064 |
|
| 1065 | void ieee80211_iter_keys_rcu(struct ieee80211_hw *hw,
|
| 1066 | struct ieee80211_vif *vif,
|
| 1067 | void (*iter)(struct ieee80211_hw *hw,
|
| 1068 | struct ieee80211_vif *vif,
|
| 1069 | struct ieee80211_sta *sta,
|
| 1070 | struct ieee80211_key_conf *key,
|
| 1071 | void *data),
|
| 1072 | void *iter_data)
|
| 1073 | {
|
| 1074 | struct ieee80211_local *local = hw_to_local(hw);
|
| 1075 | struct ieee80211_sub_if_data *sdata;
|
| 1076 |
|
| 1077 | if (vif) {
|
| 1078 | sdata = vif_to_sdata(vif);
|
| 1079 | _ieee80211_iter_keys_rcu(hw, sdata, iter, iter_data);
|
| 1080 | } else {
|
| 1081 | list_for_each_entry_rcu(sdata, &local->interfaces, list)
|
| 1082 | _ieee80211_iter_keys_rcu(hw, sdata, iter, iter_data);
|
| 1083 | }
|
| 1084 | }
|
| 1085 | EXPORT_SYMBOL(ieee80211_iter_keys_rcu);
|
| 1086 |
|
| 1087 | static void ieee80211_free_keys_iface(struct ieee80211_sub_if_data *sdata,
|
| 1088 | struct list_head *keys)
|
| 1089 | {
|
| 1090 | struct ieee80211_key *key, *tmp;
|
| 1091 |
|
| 1092 | decrease_tailroom_need_count(sdata,
|
| 1093 | sdata->crypto_tx_tailroom_pending_dec);
|
| 1094 | sdata->crypto_tx_tailroom_pending_dec = 0;
|
| 1095 |
|
| 1096 | ieee80211_debugfs_key_remove_mgmt_default(sdata);
|
| 1097 | ieee80211_debugfs_key_remove_beacon_default(sdata);
|
| 1098 |
|
| 1099 | list_for_each_entry_safe(key, tmp, &sdata->key_list, list) {
|
| 1100 | ieee80211_key_replace(key->sdata, NULL, key->sta,
|
| 1101 | key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE,
|
| 1102 | key, NULL);
|
| 1103 | list_add_tail(&key->list, keys);
|
| 1104 | }
|
| 1105 |
|
| 1106 | ieee80211_debugfs_key_update_default(sdata);
|
| 1107 | }
|
| 1108 |
|
| 1109 | void ieee80211_remove_link_keys(struct ieee80211_link_data *link,
|
| 1110 | struct list_head *keys)
|
| 1111 | {
|
| 1112 | struct ieee80211_sub_if_data *sdata = link->sdata;
|
| 1113 | struct ieee80211_local *local = sdata->local;
|
| 1114 | struct ieee80211_key *key, *tmp;
|
| 1115 |
|
| 1116 | lockdep_assert_wiphy(local->hw.wiphy);
|
| 1117 |
|
| 1118 | list_for_each_entry_safe(key, tmp, &sdata->key_list, list) {
|
| 1119 | if (key->conf.link_id != link->link_id)
|
| 1120 | continue;
|
| 1121 | ieee80211_key_replace(key->sdata, link, key->sta,
|
| 1122 | key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE,
|
| 1123 | key, NULL);
|
| 1124 | list_add_tail(&key->list, keys);
|
| 1125 | }
|
| 1126 | }
|
| 1127 |
|
| 1128 | void ieee80211_free_key_list(struct ieee80211_local *local,
|
| 1129 | struct list_head *keys)
|
| 1130 | {
|
| 1131 | struct ieee80211_key *key, *tmp;
|
| 1132 |
|
| 1133 | lockdep_assert_wiphy(local->hw.wiphy);
|
| 1134 |
|
| 1135 | list_for_each_entry_safe(key, tmp, keys, list)
|
| 1136 | __ieee80211_key_destroy(key, false);
|
| 1137 | }
|
| 1138 |
|
| 1139 | void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata,
|
| 1140 | bool force_synchronize)
|
| 1141 | {
|
| 1142 | struct ieee80211_local *local = sdata->local;
|
| 1143 | struct ieee80211_sub_if_data *vlan;
|
| 1144 | struct ieee80211_sub_if_data *master;
|
| 1145 | struct ieee80211_key *key, *tmp;
|
| 1146 | LIST_HEAD(keys);
|
| 1147 |
|
| 1148 | wiphy_delayed_work_cancel(local->hw.wiphy,
|
| 1149 | &sdata->dec_tailroom_needed_wk);
|
| 1150 |
|
| 1151 | lockdep_assert_wiphy(local->hw.wiphy);
|
| 1152 |
|
| 1153 | ieee80211_free_keys_iface(sdata, &keys);
|
| 1154 |
|
| 1155 | if (sdata->vif.type == NL80211_IFTYPE_AP) {
|
| 1156 | list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
|
| 1157 | ieee80211_free_keys_iface(vlan, &keys);
|
| 1158 | }
|
| 1159 |
|
| 1160 | if (!list_empty(&keys) || force_synchronize)
|
| 1161 | synchronize_net();
|
| 1162 | list_for_each_entry_safe(key, tmp, &keys, list)
|
| 1163 | __ieee80211_key_destroy(key, false);
|
| 1164 |
|
| 1165 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
|
| 1166 | if (sdata->bss) {
|
| 1167 | master = container_of(sdata->bss,
|
| 1168 | struct ieee80211_sub_if_data,
|
| 1169 | u.ap);
|
| 1170 |
|
| 1171 | WARN_ON_ONCE(sdata->crypto_tx_tailroom_needed_cnt !=
|
| 1172 | master->crypto_tx_tailroom_needed_cnt);
|
| 1173 | }
|
| 1174 | } else {
|
| 1175 | WARN_ON_ONCE(sdata->crypto_tx_tailroom_needed_cnt ||
|
| 1176 | sdata->crypto_tx_tailroom_pending_dec);
|
| 1177 | }
|
| 1178 |
|
| 1179 | if (sdata->vif.type == NL80211_IFTYPE_AP) {
|
| 1180 | list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
|
| 1181 | WARN_ON_ONCE(vlan->crypto_tx_tailroom_needed_cnt ||
|
| 1182 | vlan->crypto_tx_tailroom_pending_dec);
|
| 1183 | }
|
| 1184 | }
|
| 1185 |
|
| 1186 | void ieee80211_free_sta_keys(struct ieee80211_local *local,
|
| 1187 | struct sta_info *sta)
|
| 1188 | {
|
| 1189 | struct ieee80211_key *key;
|
| 1190 | int i;
|
| 1191 |
|
| 1192 | lockdep_assert_wiphy(local->hw.wiphy);
|
| 1193 |
|
| 1194 | for (i = 0; i < ARRAY_SIZE(sta->deflink.gtk); i++) {
|
| 1195 | key = wiphy_dereference(local->hw.wiphy, sta->deflink.gtk[i]);
|
| 1196 | if (!key)
|
| 1197 | continue;
|
| 1198 | ieee80211_key_replace(key->sdata, NULL, key->sta,
|
| 1199 | key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE,
|
| 1200 | key, NULL);
|
| 1201 | __ieee80211_key_destroy(key, key->sdata->vif.type ==
|
| 1202 | NL80211_IFTYPE_STATION);
|
| 1203 | }
|
| 1204 |
|
| 1205 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
|
| 1206 | key = wiphy_dereference(local->hw.wiphy, sta->ptk[i]);
|
| 1207 | if (!key)
|
| 1208 | continue;
|
| 1209 | ieee80211_key_replace(key->sdata, NULL, key->sta,
|
| 1210 | key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE,
|
| 1211 | key, NULL);
|
| 1212 | __ieee80211_key_destroy(key, key->sdata->vif.type ==
|
| 1213 | NL80211_IFTYPE_STATION);
|
| 1214 | }
|
| 1215 | }
|
| 1216 |
|
| 1217 | void ieee80211_delayed_tailroom_dec(struct wiphy *wiphy,
|
| 1218 | struct wiphy_work *wk)
|
| 1219 | {
|
| 1220 | struct ieee80211_sub_if_data *sdata;
|
| 1221 |
|
| 1222 | sdata = container_of(wk, struct ieee80211_sub_if_data,
|
| 1223 | dec_tailroom_needed_wk.work);
|
| 1224 |
|
| 1225 | |
| 1226 | * The reason for the delayed tailroom needed decrementing is to
|
| 1227 | * make roaming faster: during roaming, all keys are first deleted
|
| 1228 | * and then new keys are installed. The first new key causes the
|
| 1229 | * crypto_tx_tailroom_needed_cnt to go from 0 to 1, which invokes
|
| 1230 | * the cost of synchronize_net() (which can be slow). Avoid this
|
| 1231 | * by deferring the crypto_tx_tailroom_needed_cnt decrementing on
|
| 1232 | * key removal for a while, so if we roam the value is larger than
|
| 1233 | * zero and no 0->1 transition happens.
|
| 1234 | *
|
| 1235 | * The cost is that if the AP switching was from an AP with keys
|
| 1236 | * to one without, we still allocate tailroom while it would no
|
| 1237 | * longer be needed. However, in the typical (fast) roaming case
|
| 1238 | * within an ESS this usually won't happen.
|
| 1239 |
|
| 1240 |
|
| 1241 | decrease_tailroom_need_count(sdata,
|
| 1242 | sdata->crypto_tx_tailroom_pending_dec);
|
| 1243 | sdata->crypto_tx_tailroom_pending_dec = 0;
|
| 1244 | }
|
| 1245 |
|
| 1246 | void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid,
|
| 1247 | const u8 *replay_ctr, gfp_t gfp)
|
| 1248 | {
|
| 1249 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
|
| 1250 |
|
| 1251 | trace_api_gtk_rekey_notify(sdata, bssid, replay_ctr);
|
| 1252 |
|
| 1253 | cfg80211_gtk_rekey_notify(sdata->dev, bssid, replay_ctr, gfp);
|
| 1254 | }
|
| 1255 | EXPORT_SYMBOL_GPL(ieee80211_gtk_rekey_notify);
|
| 1256 |
|
| 1257 | void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf,
|
| 1258 | int tid, struct ieee80211_key_seq *seq)
|
| 1259 | {
|
| 1260 | struct ieee80211_key *key;
|
| 1261 | const u8 *pn;
|
| 1262 |
|
| 1263 | key = container_of(keyconf, struct ieee80211_key, conf);
|
| 1264 |
|
| 1265 | switch (key->conf.cipher) {
|
| 1266 | case WLAN_CIPHER_SUITE_TKIP:
|
| 1267 | if (WARN_ON(tid < 0 || tid >= IEEE80211_NUM_TIDS))
|
| 1268 | return;
|
| 1269 | seq->tkip.iv32 = key->u.tkip.rx[tid].iv32;
|
| 1270 | seq->tkip.iv16 = key->u.tkip.rx[tid].iv16;
|
| 1271 | break;
|
| 1272 | case WLAN_CIPHER_SUITE_CCMP:
|
| 1273 | case WLAN_CIPHER_SUITE_CCMP_256:
|
| 1274 | if (WARN_ON(tid < -1 || tid >= IEEE80211_NUM_TIDS))
|
| 1275 | return;
|
| 1276 | if (tid < 0)
|
| 1277 | pn = key->u.ccmp.rx_pn[IEEE80211_NUM_TIDS];
|
| 1278 | else
|
| 1279 | pn = key->u.ccmp.rx_pn[tid];
|
| 1280 | memcpy(seq->ccmp.pn, pn, IEEE80211_CCMP_PN_LEN);
|
| 1281 | break;
|
| 1282 | case WLAN_CIPHER_SUITE_AES_CMAC:
|
| 1283 | case WLAN_CIPHER_SUITE_BIP_CMAC_256:
|
| 1284 | if (WARN_ON(tid != 0))
|
| 1285 | return;
|
| 1286 | pn = key->u.aes_cmac.rx_pn;
|
| 1287 | memcpy(seq->aes_cmac.pn, pn, IEEE80211_CMAC_PN_LEN);
|
| 1288 | break;
|
| 1289 | case WLAN_CIPHER_SUITE_BIP_GMAC_128:
|
| 1290 | case WLAN_CIPHER_SUITE_BIP_GMAC_256:
|
| 1291 | if (WARN_ON(tid != 0))
|
| 1292 | return;
|
| 1293 | pn = key->u.aes_gmac.rx_pn;
|
| 1294 | memcpy(seq->aes_gmac.pn, pn, IEEE80211_GMAC_PN_LEN);
|
| 1295 | break;
|
| 1296 | case WLAN_CIPHER_SUITE_GCMP:
|
| 1297 | case WLAN_CIPHER_SUITE_GCMP_256:
|
| 1298 | if (WARN_ON(tid < -1 || tid >= IEEE80211_NUM_TIDS))
|
| 1299 | return;
|
| 1300 | if (tid < 0)
|
| 1301 | pn = key->u.gcmp.rx_pn[IEEE80211_NUM_TIDS];
|
| 1302 | else
|
| 1303 | pn = key->u.gcmp.rx_pn[tid];
|
| 1304 | memcpy(seq->gcmp.pn, pn, IEEE80211_GCMP_PN_LEN);
|
| 1305 | break;
|
| 1306 | }
|
| 1307 | }
|
| 1308 | EXPORT_SYMBOL(ieee80211_get_key_rx_seq);
|
| 1309 |
|
| 1310 | void ieee80211_set_key_rx_seq(struct ieee80211_key_conf *keyconf,
|
| 1311 | int tid, struct ieee80211_key_seq *seq)
|
| 1312 | {
|
| 1313 | struct ieee80211_key *key;
|
| 1314 | u8 *pn;
|
| 1315 |
|
| 1316 | key = container_of(keyconf, struct ieee80211_key, conf);
|
| 1317 |
|
| 1318 | switch (key->conf.cipher) {
|
| 1319 | case WLAN_CIPHER_SUITE_TKIP:
|
| 1320 | if (WARN_ON(tid < 0 || tid >= IEEE80211_NUM_TIDS))
|
| 1321 | return;
|
| 1322 | key->u.tkip.rx[tid].iv32 = seq->tkip.iv32;
|
| 1323 | key->u.tkip.rx[tid].iv16 = seq->tkip.iv16;
|
| 1324 | break;
|
| 1325 | case WLAN_CIPHER_SUITE_CCMP:
|
| 1326 | case WLAN_CIPHER_SUITE_CCMP_256:
|
| 1327 | if (WARN_ON(tid < -1 || tid >= IEEE80211_NUM_TIDS))
|
| 1328 | return;
|
| 1329 | if (tid < 0)
|
| 1330 | pn = key->u.ccmp.rx_pn[IEEE80211_NUM_TIDS];
|
| 1331 | else
|
| 1332 | pn = key->u.ccmp.rx_pn[tid];
|
| 1333 | memcpy(pn, seq->ccmp.pn, IEEE80211_CCMP_PN_LEN);
|
| 1334 | break;
|
| 1335 | case WLAN_CIPHER_SUITE_AES_CMAC:
|
| 1336 | case WLAN_CIPHER_SUITE_BIP_CMAC_256:
|
| 1337 | if (WARN_ON(tid != 0))
|
| 1338 | return;
|
| 1339 | pn = key->u.aes_cmac.rx_pn;
|
| 1340 | memcpy(pn, seq->aes_cmac.pn, IEEE80211_CMAC_PN_LEN);
|
| 1341 | break;
|
| 1342 | case WLAN_CIPHER_SUITE_BIP_GMAC_128:
|
| 1343 | case WLAN_CIPHER_SUITE_BIP_GMAC_256:
|
| 1344 | if (WARN_ON(tid != 0))
|
| 1345 | return;
|
| 1346 | pn = key->u.aes_gmac.rx_pn;
|
| 1347 | memcpy(pn, seq->aes_gmac.pn, IEEE80211_GMAC_PN_LEN);
|
| 1348 | break;
|
| 1349 | case WLAN_CIPHER_SUITE_GCMP:
|
| 1350 | case WLAN_CIPHER_SUITE_GCMP_256:
|
| 1351 | if (WARN_ON(tid < -1 || tid >= IEEE80211_NUM_TIDS))
|
| 1352 | return;
|
| 1353 | if (tid < 0)
|
| 1354 | pn = key->u.gcmp.rx_pn[IEEE80211_NUM_TIDS];
|
| 1355 | else
|
| 1356 | pn = key->u.gcmp.rx_pn[tid];
|
| 1357 | memcpy(pn, seq->gcmp.pn, IEEE80211_GCMP_PN_LEN);
|
| 1358 | break;
|
| 1359 | default:
|
| 1360 | WARN_ON(1);
|
| 1361 | break;
|
| 1362 | }
|
| 1363 | }
|
| 1364 | EXPORT_SYMBOL_GPL(ieee80211_set_key_rx_seq);
|
| 1365 |
|
| 1366 | struct ieee80211_key_conf *
|
| 1367 | ieee80211_gtk_rekey_add(struct ieee80211_vif *vif,
|
| 1368 | u8 idx, u8 *key_data, u8 key_len,
|
| 1369 | int link_id)
|
| 1370 | {
|
| 1371 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
|
| 1372 | struct ieee80211_local *local = sdata->local;
|
| 1373 | struct ieee80211_key *prev_key;
|
| 1374 | struct ieee80211_key *key;
|
| 1375 | int err;
|
| 1376 | struct ieee80211_link_data *link_data =
|
| 1377 | link_id < 0 ? &sdata->deflink :
|
| 1378 | sdata_dereference(sdata->link[link_id], sdata);
|
| 1379 |
|
| 1380 | if (WARN_ON(!link_data))
|
| 1381 | return ERR_PTR(-EINVAL);
|
| 1382 |
|
| 1383 | if (WARN_ON(!local->wowlan))
|
| 1384 | return ERR_PTR(-EINVAL);
|
| 1385 |
|
| 1386 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
|
| 1387 | return ERR_PTR(-EINVAL);
|
| 1388 |
|
| 1389 | if (WARN_ON(idx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS +
|
| 1390 | NUM_DEFAULT_BEACON_KEYS))
|
| 1391 | return ERR_PTR(-EINVAL);
|
| 1392 |
|
| 1393 | prev_key = wiphy_dereference(local->hw.wiphy,
|
| 1394 | link_data->gtk[idx]);
|
| 1395 | if (!prev_key) {
|
| 1396 | if (idx < NUM_DEFAULT_KEYS) {
|
| 1397 | for (int i = 0; i < NUM_DEFAULT_KEYS; i++) {
|
| 1398 | if (i == idx)
|
| 1399 | continue;
|
| 1400 | prev_key = wiphy_dereference(local->hw.wiphy,
|
| 1401 | link_data->gtk[i]);
|
| 1402 | if (prev_key)
|
| 1403 | break;
|
| 1404 | }
|
| 1405 | } else {
|
| 1406 |
|
| 1407 | prev_key = wiphy_dereference(local->hw.wiphy,
|
| 1408 | link_data->gtk[idx ^ 1]);
|
| 1409 | }
|
| 1410 | }
|
| 1411 |
|
| 1412 | if (WARN_ON(!prev_key))
|
| 1413 | return ERR_PTR(-EINVAL);
|
| 1414 |
|
| 1415 | if (WARN_ON(key_len < prev_key->conf.keylen))
|
| 1416 | return ERR_PTR(-EINVAL);
|
| 1417 |
|
| 1418 | key = ieee80211_key_alloc(prev_key->conf.cipher, idx,
|
| 1419 | prev_key->conf.keylen, key_data,
|
| 1420 | 0, NULL);
|
| 1421 | if (IS_ERR(key))
|
| 1422 | return ERR_CAST(key);
|
| 1423 |
|
| 1424 | if (sdata->u.mgd.mfp != IEEE80211_MFP_DISABLED)
|
| 1425 | key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT;
|
| 1426 |
|
| 1427 | key->conf.link_id = link_data->link_id;
|
| 1428 |
|
| 1429 | err = ieee80211_key_link(key, link_data, NULL);
|
| 1430 | if (err)
|
| 1431 | return ERR_PTR(err);
|
| 1432 |
|
| 1433 | return &key->conf;
|
| 1434 | }
|
| 1435 | EXPORT_SYMBOL_GPL(ieee80211_gtk_rekey_add);
|
| 1436 |
|
| 1437 | void ieee80211_key_mic_failure(struct ieee80211_key_conf *keyconf)
|
| 1438 | {
|
| 1439 | struct ieee80211_key *key;
|
| 1440 |
|
| 1441 | key = container_of(keyconf, struct ieee80211_key, conf);
|
| 1442 |
|
| 1443 | switch (key->conf.cipher) {
|
| 1444 | case WLAN_CIPHER_SUITE_AES_CMAC:
|
| 1445 | case WLAN_CIPHER_SUITE_BIP_CMAC_256:
|
| 1446 | key->u.aes_cmac.icverrors++;
|
| 1447 | break;
|
| 1448 | case WLAN_CIPHER_SUITE_BIP_GMAC_128:
|
| 1449 | case WLAN_CIPHER_SUITE_BIP_GMAC_256:
|
| 1450 | key->u.aes_gmac.icverrors++;
|
| 1451 | break;
|
| 1452 | default:
|
| 1453 |
|
| 1454 | break;
|
| 1455 | }
|
| 1456 | }
|
| 1457 | EXPORT_SYMBOL_GPL(ieee80211_key_mic_failure);
|
| 1458 |
|
| 1459 | void ieee80211_key_replay(struct ieee80211_key_conf *keyconf)
|
| 1460 | {
|
| 1461 | struct ieee80211_key *key;
|
| 1462 |
|
| 1463 | key = container_of(keyconf, struct ieee80211_key, conf);
|
| 1464 |
|
| 1465 | switch (key->conf.cipher) {
|
| 1466 | case WLAN_CIPHER_SUITE_CCMP:
|
| 1467 | case WLAN_CIPHER_SUITE_CCMP_256:
|
| 1468 | key->u.ccmp.replays++;
|
| 1469 | break;
|
| 1470 | case WLAN_CIPHER_SUITE_AES_CMAC:
|
| 1471 | case WLAN_CIPHER_SUITE_BIP_CMAC_256:
|
| 1472 | key->u.aes_cmac.replays++;
|
| 1473 | break;
|
| 1474 | case WLAN_CIPHER_SUITE_BIP_GMAC_128:
|
| 1475 | case WLAN_CIPHER_SUITE_BIP_GMAC_256:
|
| 1476 | key->u.aes_gmac.replays++;
|
| 1477 | break;
|
| 1478 | case WLAN_CIPHER_SUITE_GCMP:
|
| 1479 | case WLAN_CIPHER_SUITE_GCMP_256:
|
| 1480 | key->u.gcmp.replays++;
|
| 1481 | break;
|
| 1482 | }
|
| 1483 | }
|
| 1484 | EXPORT_SYMBOL_GPL(ieee80211_key_replay);
|
| 1485 |
|
| 1486 | int ieee80211_key_switch_links(struct ieee80211_sub_if_data *sdata,
|
| 1487 | unsigned long del_links_mask,
|
| 1488 | unsigned long add_links_mask)
|
| 1489 | {
|
| 1490 | struct ieee80211_key *key;
|
| 1491 | int ret;
|
| 1492 |
|
| 1493 | list_for_each_entry(key, &sdata->key_list, list) {
|
| 1494 | if (key->conf.link_id < 0 ||
|
| 1495 | !(del_links_mask & BIT(key->conf.link_id)))
|
| 1496 | continue;
|
| 1497 |
|
| 1498 |
|
| 1499 | WARN_ON(key->sta);
|
| 1500 |
|
| 1501 | ieee80211_key_disable_hw_accel(key);
|
| 1502 | }
|
| 1503 |
|
| 1504 | list_for_each_entry(key, &sdata->key_list, list) {
|
| 1505 | if (key->conf.link_id < 0 ||
|
| 1506 | !(add_links_mask & BIT(key->conf.link_id)))
|
| 1507 | continue;
|
| 1508 |
|
| 1509 |
|
| 1510 | WARN_ON(key->sta);
|
| 1511 |
|
| 1512 | ret = ieee80211_key_enable_hw_accel(key);
|
| 1513 | if (ret)
|
| 1514 | return ret;
|
| 1515 | }
|
| 1516 |
|
| 1517 | return 0;
|
| 1518 | }
|