1 /*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * 26 * $FreeBSD: head/sys/net80211/ieee80211_crypto.c 195812 2009-07-21 19:36:32Z sam $ 27 * $DragonFly$ 28 */ 29 30 /* 31 * IEEE 802.11 generic crypto support. 32 */ 33 #include "opt_wlan.h" 34 35 #include <sys/param.h> 36 #include <sys/kernel.h> 37 #include <sys/malloc.h> 38 #include <sys/mbuf.h> 39 40 #include <sys/socket.h> 41 42 #include <net/if.h> 43 #include <net/if_media.h> 44 #include <net/ethernet.h> /* XXX ETHER_HDR_LEN */ 45 #include <net/route.h> 46 47 #include <netproto/802_11/ieee80211_var.h> 48 49 MALLOC_DEFINE(M_80211_CRYPTO, "80211crypto", "802.11 crypto state"); 50 51 static int _ieee80211_crypto_delkey(struct ieee80211vap *, 52 struct ieee80211_key *); 53 54 /* 55 * Table of registered cipher modules. 56 */ 57 static const struct ieee80211_cipher *ciphers[IEEE80211_CIPHER_MAX]; 58 59 /* 60 * Default "null" key management routines. 61 */ 62 static int 63 null_key_alloc(struct ieee80211vap *vap, struct ieee80211_key *k, 64 ieee80211_keyix *keyix, ieee80211_keyix *rxkeyix) 65 { 66 if (!(&vap->iv_nw_keys[0] <= k && 67 k < &vap->iv_nw_keys[IEEE80211_WEP_NKID])) { 68 /* 69 * Not in the global key table, the driver should handle this 70 * by allocating a slot in the h/w key table/cache. In 71 * lieu of that return key slot 0 for any unicast key 72 * request. We disallow the request if this is a group key. 73 * This default policy does the right thing for legacy hardware 74 * with a 4 key table. It also handles devices that pass 75 * packets through untouched when marked with the WEP bit 76 * and key index 0. 77 */ 78 if (k->wk_flags & IEEE80211_KEY_GROUP) 79 return 0; 80 *keyix = 0; /* NB: use key index 0 for ucast key */ 81 } else { 82 *keyix = k - vap->iv_nw_keys; 83 } 84 *rxkeyix = IEEE80211_KEYIX_NONE; /* XXX maybe *keyix? */ 85 return 1; 86 } 87 static int 88 null_key_delete(struct ieee80211vap *vap, const struct ieee80211_key *k) 89 { 90 return 1; 91 } 92 static int 93 null_key_set(struct ieee80211vap *vap, const struct ieee80211_key *k, 94 const uint8_t mac[IEEE80211_ADDR_LEN]) 95 { 96 return 1; 97 } 98 static void null_key_update(struct ieee80211vap *vap) {} 99 100 /* 101 * Write-arounds for common operations. 102 */ 103 static __inline void 104 cipher_detach(struct ieee80211_key *key) 105 { 106 key->wk_cipher->ic_detach(key); 107 } 108 109 static __inline void * 110 cipher_attach(struct ieee80211vap *vap, struct ieee80211_key *key) 111 { 112 return key->wk_cipher->ic_attach(vap, key); 113 } 114 115 /* 116 * Wrappers for driver key management methods. 117 */ 118 static __inline int 119 dev_key_alloc(struct ieee80211vap *vap, 120 struct ieee80211_key *key, 121 ieee80211_keyix *keyix, ieee80211_keyix *rxkeyix) 122 { 123 return vap->iv_key_alloc(vap, key, keyix, rxkeyix); 124 } 125 126 static __inline int 127 dev_key_delete(struct ieee80211vap *vap, 128 const struct ieee80211_key *key) 129 { 130 return vap->iv_key_delete(vap, key); 131 } 132 133 static __inline int 134 dev_key_set(struct ieee80211vap *vap, const struct ieee80211_key *key) 135 { 136 return vap->iv_key_set(vap, key, key->wk_macaddr); 137 } 138 139 /* 140 * Setup crypto support for a device/shared instance. 141 */ 142 void 143 ieee80211_crypto_attach(struct ieee80211com *ic) 144 { 145 /* NB: we assume everything is pre-zero'd */ 146 ciphers[IEEE80211_CIPHER_NONE] = &ieee80211_cipher_none; 147 } 148 149 /* 150 * Teardown crypto support. 151 */ 152 void 153 ieee80211_crypto_detach(struct ieee80211com *ic) 154 { 155 } 156 157 /* 158 * Setup crypto support for a vap. 159 */ 160 void 161 ieee80211_crypto_vattach(struct ieee80211vap *vap) 162 { 163 int i; 164 165 /* NB: we assume everything is pre-zero'd */ 166 vap->iv_max_keyix = IEEE80211_WEP_NKID; 167 vap->iv_def_txkey = IEEE80211_KEYIX_NONE; 168 for (i = 0; i < IEEE80211_WEP_NKID; i++) 169 ieee80211_crypto_resetkey(vap, &vap->iv_nw_keys[i], 170 IEEE80211_KEYIX_NONE); 171 /* 172 * Initialize the driver key support routines to noop entries. 173 * This is useful especially for the cipher test modules. 174 */ 175 vap->iv_key_alloc = null_key_alloc; 176 vap->iv_key_set = null_key_set; 177 vap->iv_key_delete = null_key_delete; 178 vap->iv_key_update_begin = null_key_update; 179 vap->iv_key_update_end = null_key_update; 180 } 181 182 /* 183 * Teardown crypto support for a vap. 184 */ 185 void 186 ieee80211_crypto_vdetach(struct ieee80211vap *vap) 187 { 188 ieee80211_crypto_delglobalkeys(vap); 189 } 190 191 /* 192 * Register a crypto cipher module. 193 */ 194 void 195 ieee80211_crypto_register(const struct ieee80211_cipher *cip) 196 { 197 if (cip->ic_cipher >= IEEE80211_CIPHER_MAX) { 198 kprintf("%s: cipher %s has an invalid cipher index %u\n", 199 __func__, cip->ic_name, cip->ic_cipher); 200 return; 201 } 202 if (ciphers[cip->ic_cipher] != NULL && ciphers[cip->ic_cipher] != cip) { 203 kprintf("%s: cipher %s registered with a different template\n", 204 __func__, cip->ic_name); 205 return; 206 } 207 ciphers[cip->ic_cipher] = cip; 208 } 209 210 /* 211 * Unregister a crypto cipher module. 212 */ 213 void 214 ieee80211_crypto_unregister(const struct ieee80211_cipher *cip) 215 { 216 if (cip->ic_cipher >= IEEE80211_CIPHER_MAX) { 217 kprintf("%s: cipher %s has an invalid cipher index %u\n", 218 __func__, cip->ic_name, cip->ic_cipher); 219 return; 220 } 221 if (ciphers[cip->ic_cipher] != NULL && ciphers[cip->ic_cipher] != cip) { 222 kprintf("%s: cipher %s registered with a different template\n", 223 __func__, cip->ic_name); 224 return; 225 } 226 /* NB: don't complain about not being registered */ 227 /* XXX disallow if references */ 228 ciphers[cip->ic_cipher] = NULL; 229 } 230 231 int 232 ieee80211_crypto_available(u_int cipher) 233 { 234 return cipher < IEEE80211_CIPHER_MAX && ciphers[cipher] != NULL; 235 } 236 237 /* XXX well-known names! */ 238 static const char *cipher_modnames[IEEE80211_CIPHER_MAX] = { 239 [IEEE80211_CIPHER_WEP] = "wlan_wep", 240 [IEEE80211_CIPHER_TKIP] = "wlan_tkip", 241 [IEEE80211_CIPHER_AES_OCB] = "wlan_aes_ocb", 242 [IEEE80211_CIPHER_AES_CCM] = "wlan_ccmp", 243 [IEEE80211_CIPHER_TKIPMIC] = "#4", /* NB: reserved */ 244 [IEEE80211_CIPHER_CKIP] = "wlan_ckip", 245 [IEEE80211_CIPHER_NONE] = "wlan_none", 246 }; 247 248 /* NB: there must be no overlap between user-supplied and device-owned flags */ 249 CTASSERT((IEEE80211_KEY_COMMON & IEEE80211_KEY_DEVICE) == 0); 250 251 /* 252 * Establish a relationship between the specified key and cipher 253 * and, if necessary, allocate a hardware index from the driver. 254 * Note that when a fixed key index is required it must be specified. 255 * 256 * This must be the first call applied to a key; all the other key 257 * routines assume wk_cipher is setup. 258 * 259 * Locking must be handled by the caller using: 260 * ieee80211_key_update_begin(vap); 261 * ieee80211_key_update_end(vap); 262 */ 263 int 264 ieee80211_crypto_newkey(struct ieee80211vap *vap, 265 int cipher, int flags, struct ieee80211_key *key) 266 { 267 struct ieee80211com *ic = vap->iv_ic; 268 const struct ieee80211_cipher *cip; 269 ieee80211_keyix keyix, rxkeyix; 270 void *keyctx; 271 int oflags; 272 273 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 274 "%s: cipher %u flags 0x%x keyix %u\n", 275 __func__, cipher, flags, key->wk_keyix); 276 277 /* 278 * Validate cipher and set reference to cipher routines. 279 */ 280 if (cipher >= IEEE80211_CIPHER_MAX) { 281 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 282 "%s: invalid cipher %u\n", __func__, cipher); 283 vap->iv_stats.is_crypto_badcipher++; 284 return 0; 285 } 286 cip = ciphers[cipher]; 287 if (cip == NULL) { 288 /* 289 * Auto-load cipher module if we have a well-known name 290 * for it. It might be better to use string names rather 291 * than numbers and craft a module name based on the cipher 292 * name; e.g. wlan_cipher_<cipher-name>. 293 */ 294 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 295 "%s: unregistered cipher %u, load module %s\n", 296 __func__, cipher, cipher_modnames[cipher]); 297 ieee80211_load_module(cipher_modnames[cipher]); 298 /* 299 * If cipher module loaded it should immediately 300 * call ieee80211_crypto_register which will fill 301 * in the entry in the ciphers array. 302 */ 303 cip = ciphers[cipher]; 304 if (cip == NULL) { 305 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 306 "%s: unable to load cipher %u, module %s\n", 307 __func__, cipher, cipher_modnames[cipher]); 308 vap->iv_stats.is_crypto_nocipher++; 309 return 0; 310 } 311 } 312 313 oflags = key->wk_flags; 314 flags &= IEEE80211_KEY_COMMON; 315 /* NB: preserve device attributes */ 316 flags |= (oflags & IEEE80211_KEY_DEVICE); 317 /* 318 * If the hardware does not support the cipher then 319 * fallback to a host-based implementation. 320 */ 321 if ((ic->ic_cryptocaps & (1<<cipher)) == 0) { 322 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 323 "%s: no h/w support for cipher %s, falling back to s/w\n", 324 __func__, cip->ic_name); 325 flags |= IEEE80211_KEY_SWCRYPT; 326 } 327 if (ieee80211_force_swcrypto) { 328 flags |= IEEE80211_KEY_SWCRYPT; 329 flags |= IEEE80211_KEY_SWMIC; 330 } 331 /* 332 * Hardware TKIP with software MIC is an important 333 * combination; we handle it by flagging each key, 334 * the cipher modules honor it. 335 */ 336 if (cipher == IEEE80211_CIPHER_TKIP && 337 (ic->ic_cryptocaps & IEEE80211_CRYPTO_TKIPMIC) == 0) { 338 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 339 "%s: no h/w support for TKIP MIC, falling back to s/w\n", 340 __func__); 341 flags |= IEEE80211_KEY_SWMIC; 342 } 343 344 /* 345 * Bind cipher to key instance. Note we do this 346 * after checking the device capabilities so the 347 * cipher module can optimize space usage based on 348 * whether or not it needs to do the cipher work. 349 */ 350 if (key->wk_cipher != cip || key->wk_flags != flags) { 351 /* 352 * Fillin the flags so cipher modules can see s/w 353 * crypto requirements and potentially allocate 354 * different state and/or attach different method 355 * pointers. 356 */ 357 key->wk_flags = flags; 358 keyctx = cip->ic_attach(vap, key); 359 if (keyctx == NULL) { 360 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 361 "%s: unable to attach cipher %s\n", 362 __func__, cip->ic_name); 363 key->wk_flags = oflags; /* restore old flags */ 364 vap->iv_stats.is_crypto_attachfail++; 365 return 0; 366 } 367 cipher_detach(key); 368 key->wk_cipher = cip; /* XXX refcnt? */ 369 key->wk_private = keyctx; 370 } 371 372 /* 373 * Ask the driver for a key index if we don't have one. 374 * Note that entries in the global key table always have 375 * an index; this means it's safe to call this routine 376 * for these entries just to setup the reference to the 377 * cipher template. Note also that when using software 378 * crypto we also call the driver to give us a key index. 379 */ 380 if ((key->wk_flags & IEEE80211_KEY_DEVKEY) == 0) { 381 if (!dev_key_alloc(vap, key, &keyix, &rxkeyix)) { 382 /* 383 * Unable to setup driver state. 384 */ 385 vap->iv_stats.is_crypto_keyfail++; 386 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 387 "%s: unable to setup cipher %s\n", 388 __func__, cip->ic_name); 389 return 0; 390 } 391 if (key->wk_flags != flags) { 392 /* 393 * Driver overrode flags we setup; typically because 394 * resources were unavailable to handle _this_ key. 395 * Re-attach the cipher context to allow cipher 396 * modules to handle differing requirements. 397 */ 398 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 399 "%s: driver override for cipher %s, flags " 400 "0x%x -> 0x%x\n", __func__, cip->ic_name, 401 oflags, key->wk_flags); 402 keyctx = cip->ic_attach(vap, key); 403 if (keyctx == NULL) { 404 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 405 "%s: unable to attach cipher %s with " 406 "flags 0x%x\n", __func__, cip->ic_name, 407 key->wk_flags); 408 key->wk_flags = oflags; /* restore old flags */ 409 vap->iv_stats.is_crypto_attachfail++; 410 return 0; 411 } 412 cipher_detach(key); 413 key->wk_cipher = cip; /* XXX refcnt? */ 414 key->wk_private = keyctx; 415 } 416 key->wk_keyix = keyix; 417 key->wk_rxkeyix = rxkeyix; 418 key->wk_flags |= IEEE80211_KEY_DEVKEY; 419 } 420 return 1; 421 } 422 423 /* 424 * Remove the key (no locking, for internal use). 425 */ 426 static int 427 _ieee80211_crypto_delkey(struct ieee80211vap *vap, struct ieee80211_key *key) 428 { 429 KASSERT(key->wk_cipher != NULL, ("No cipher!")); 430 431 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 432 "%s: %s keyix %u flags 0x%x rsc %ju tsc %ju len %u\n", 433 __func__, key->wk_cipher->ic_name, 434 key->wk_keyix, key->wk_flags, 435 key->wk_keyrsc[IEEE80211_NONQOS_TID], key->wk_keytsc, 436 key->wk_keylen); 437 438 if (key->wk_flags & IEEE80211_KEY_DEVKEY) { 439 /* 440 * Remove hardware entry. 441 */ 442 /* XXX key cache */ 443 if (!dev_key_delete(vap, key)) { 444 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 445 "%s: driver did not delete key index %u\n", 446 __func__, key->wk_keyix); 447 vap->iv_stats.is_crypto_delkey++; 448 /* XXX recovery? */ 449 } 450 } 451 cipher_detach(key); 452 memset(key, 0, sizeof(*key)); 453 ieee80211_crypto_resetkey(vap, key, IEEE80211_KEYIX_NONE); 454 return 1; 455 } 456 457 /* 458 * Remove the specified key. 459 */ 460 int 461 ieee80211_crypto_delkey(struct ieee80211vap *vap, struct ieee80211_key *key) 462 { 463 int status; 464 465 ieee80211_key_update_begin(vap); 466 status = _ieee80211_crypto_delkey(vap, key); 467 ieee80211_key_update_end(vap); 468 return status; 469 } 470 471 /* 472 * Clear the global key table. 473 */ 474 void 475 ieee80211_crypto_delglobalkeys(struct ieee80211vap *vap) 476 { 477 int i; 478 479 ieee80211_key_update_begin(vap); 480 for (i = 0; i < IEEE80211_WEP_NKID; i++) 481 (void) _ieee80211_crypto_delkey(vap, &vap->iv_nw_keys[i]); 482 ieee80211_key_update_end(vap); 483 } 484 485 /* 486 * Set the contents of the specified key. 487 * 488 * Locking must be handled by the caller using: 489 * ieee80211_key_update_begin(vap); 490 * ieee80211_key_update_end(vap); 491 */ 492 int 493 ieee80211_crypto_setkey(struct ieee80211vap *vap, struct ieee80211_key *key) 494 { 495 const struct ieee80211_cipher *cip = key->wk_cipher; 496 497 KASSERT(cip != NULL, ("No cipher!")); 498 499 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 500 "%s: %s keyix %u flags 0x%x mac %6D rsc %ju tsc %ju len %u\n", 501 __func__, cip->ic_name, key->wk_keyix, 502 key->wk_flags, key->wk_macaddr, ":", 503 key->wk_keyrsc[IEEE80211_NONQOS_TID], key->wk_keytsc, 504 key->wk_keylen); 505 506 if ((key->wk_flags & IEEE80211_KEY_DEVKEY) == 0) { 507 /* XXX nothing allocated, should not happen */ 508 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 509 "%s: no device key setup done; should not happen!\n", 510 __func__); 511 vap->iv_stats.is_crypto_setkey_nokey++; 512 return 0; 513 } 514 /* 515 * Give cipher a chance to validate key contents. 516 * XXX should happen before modifying state. 517 */ 518 if (!cip->ic_setkey(key)) { 519 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 520 "%s: cipher %s rejected key index %u len %u flags 0x%x\n", 521 __func__, cip->ic_name, key->wk_keyix, 522 key->wk_keylen, key->wk_flags); 523 vap->iv_stats.is_crypto_setkey_cipher++; 524 return 0; 525 } 526 return dev_key_set(vap, key); 527 } 528 529 /* 530 * Add privacy headers appropriate for the specified key. 531 */ 532 struct ieee80211_key * 533 ieee80211_crypto_encap(struct ieee80211_node *ni, struct mbuf *m) 534 { 535 struct ieee80211vap *vap = ni->ni_vap; 536 struct ieee80211_key *k; 537 struct ieee80211_frame *wh; 538 const struct ieee80211_cipher *cip; 539 uint8_t keyid; 540 541 /* 542 * Multicast traffic always uses the multicast key. 543 * Otherwise if a unicast key is set we use that and 544 * it is always key index 0. When no unicast key is 545 * set we fall back to the default transmit key. 546 */ 547 wh = mtod(m, struct ieee80211_frame *); 548 if (IEEE80211_IS_MULTICAST(wh->i_addr1) || 549 IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)) { 550 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE) { 551 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, 552 wh->i_addr1, 553 "no default transmit key (%s) deftxkey %u", 554 __func__, vap->iv_def_txkey); 555 vap->iv_stats.is_tx_nodefkey++; 556 return NULL; 557 } 558 keyid = vap->iv_def_txkey; 559 k = &vap->iv_nw_keys[vap->iv_def_txkey]; 560 } else { 561 keyid = 0; 562 k = &ni->ni_ucastkey; 563 } 564 cip = k->wk_cipher; 565 return (cip->ic_encap(k, m, keyid<<6) ? k : NULL); 566 } 567 568 /* 569 * Validate and strip privacy headers (and trailer) for a 570 * received frame that has the WEP/Privacy bit set. 571 */ 572 struct ieee80211_key * 573 ieee80211_crypto_decap(struct ieee80211_node *ni, struct mbuf *m, int hdrlen) 574 { 575 #define IEEE80211_WEP_HDRLEN (IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN) 576 #define IEEE80211_WEP_MINLEN \ 577 (sizeof(struct ieee80211_frame) + \ 578 IEEE80211_WEP_HDRLEN + IEEE80211_WEP_CRCLEN) 579 struct ieee80211vap *vap = ni->ni_vap; 580 struct ieee80211_key *k; 581 struct ieee80211_frame *wh; 582 const struct ieee80211_cipher *cip; 583 uint8_t keyid; 584 585 /* NB: this minimum size data frame could be bigger */ 586 if (m->m_pkthdr.len < IEEE80211_WEP_MINLEN) { 587 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 588 "%s: WEP data frame too short, len %u\n", 589 __func__, m->m_pkthdr.len); 590 vap->iv_stats.is_rx_tooshort++; /* XXX need unique stat? */ 591 return NULL; 592 } 593 594 /* 595 * Locate the key. If unicast and there is no unicast 596 * key then we fall back to the key id in the header. 597 * This assumes unicast keys are only configured when 598 * the key id in the header is meaningless (typically 0). 599 */ 600 wh = mtod(m, struct ieee80211_frame *); 601 m_copydata(m, hdrlen + IEEE80211_WEP_IVLEN, sizeof(keyid), &keyid); 602 if (IEEE80211_IS_MULTICAST(wh->i_addr1) || 603 IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)) 604 k = &vap->iv_nw_keys[keyid >> 6]; 605 else 606 k = &ni->ni_ucastkey; 607 608 /* 609 * Insure crypto header is contiguous for all decap work. 610 */ 611 cip = k->wk_cipher; 612 if (m->m_len < hdrlen + cip->ic_header && 613 (m = m_pullup(m, hdrlen + cip->ic_header)) == NULL) { 614 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 615 "unable to pullup %s header", cip->ic_name); 616 vap->iv_stats.is_rx_wepfail++; /* XXX */ 617 return NULL; 618 } 619 620 return (cip->ic_decap(k, m, hdrlen) ? k : NULL); 621 #undef IEEE80211_WEP_MINLEN 622 #undef IEEE80211_WEP_HDRLEN 623 } 624 625 static void 626 load_ucastkey(void *arg, struct ieee80211_node *ni) 627 { 628 struct ieee80211vap *vap = ni->ni_vap; 629 struct ieee80211_key *k; 630 631 if (vap->iv_state != IEEE80211_S_RUN) 632 return; 633 k = &ni->ni_ucastkey; 634 if (k->wk_flags & IEEE80211_KEY_DEVKEY) 635 dev_key_set(vap, k); 636 } 637 638 /* 639 * Re-load all keys known to the 802.11 layer that may 640 * have hardware state backing them. This is used by 641 * drivers on resume to push keys down into the device. 642 */ 643 void 644 ieee80211_crypto_reload_keys(struct ieee80211com *ic) 645 { 646 struct ieee80211vap *vap; 647 int i; 648 649 /* 650 * Keys in the global key table of each vap. 651 */ 652 /* NB: used only during resume so don't lock for now */ 653 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 654 if (vap->iv_state != IEEE80211_S_RUN) 655 continue; 656 for (i = 0; i < IEEE80211_WEP_NKID; i++) { 657 const struct ieee80211_key *k = &vap->iv_nw_keys[i]; 658 if (k->wk_flags & IEEE80211_KEY_DEVKEY) 659 dev_key_set(vap, k); 660 } 661 } 662 /* 663 * Unicast keys. 664 */ 665 ieee80211_iterate_nodes(&ic->ic_sta, load_ucastkey, NULL); 666 } 667