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6fc6879b | 1 | /* |
00338a4f JM |
2 | * IEEE 802.11 RSN / WPA Authenticator |
3 | * Copyright (c) 2004-2011, Jouni Malinen <j@w1.fi> | |
6fc6879b | 4 | * |
0f3d578e JM |
5 | * This software may be distributed under the terms of the BSD license. |
6 | * See README for more details. | |
6fc6879b JM |
7 | */ |
8 | ||
6226e38d | 9 | #include "utils/includes.h" |
6fc6879b | 10 | |
6226e38d JM |
11 | #include "utils/common.h" |
12 | #include "utils/eloop.h" | |
13 | #include "utils/state_machine.h" | |
81f4f619 | 14 | #include "common/ieee802_11_defs.h" |
03da66bd JM |
15 | #include "crypto/aes_wrap.h" |
16 | #include "crypto/crypto.h" | |
17 | #include "crypto/sha1.h" | |
18 | #include "crypto/sha256.h" | |
3642c431 | 19 | #include "crypto/random.h" |
281c950b | 20 | #include "eapol_auth/eapol_auth_sm.h" |
6226e38d | 21 | #include "ap_config.h" |
6fc6879b | 22 | #include "ieee802_11.h" |
6226e38d JM |
23 | #include "wpa_auth.h" |
24 | #include "pmksa_cache_auth.h" | |
6fc6879b JM |
25 | #include "wpa_auth_i.h" |
26 | #include "wpa_auth_ie.h" | |
27 | ||
28 | #define STATE_MACHINE_DATA struct wpa_state_machine | |
29 | #define STATE_MACHINE_DEBUG_PREFIX "WPA" | |
30 | #define STATE_MACHINE_ADDR sm->addr | |
31 | ||
32 | ||
33 | static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx); | |
e4a6ea1d | 34 | static int wpa_sm_step(struct wpa_state_machine *sm); |
6fc6879b JM |
35 | static int wpa_verify_key_mic(struct wpa_ptk *PTK, u8 *data, size_t data_len); |
36 | static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx); | |
37 | static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth, | |
38 | struct wpa_group *group); | |
581a8cde | 39 | static void wpa_request_new_ptk(struct wpa_state_machine *sm); |
e6965d4e JM |
40 | static int wpa_gtk_update(struct wpa_authenticator *wpa_auth, |
41 | struct wpa_group *group); | |
1bdb7ab3 JM |
42 | static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth, |
43 | struct wpa_group *group); | |
6fc6879b | 44 | |
bae61562 JM |
45 | static const u32 dot11RSNAConfigGroupUpdateCount = 4; |
46 | static const u32 dot11RSNAConfigPairwiseUpdateCount = 4; | |
47 | static const u32 eapol_key_timeout_first = 100; /* ms */ | |
48 | static const u32 eapol_key_timeout_subseq = 1000; /* ms */ | |
00338a4f | 49 | static const u32 eapol_key_timeout_first_group = 500; /* ms */ |
6fc6879b JM |
50 | |
51 | /* TODO: make these configurable */ | |
52 | static const int dot11RSNAConfigPMKLifetime = 43200; | |
53 | static const int dot11RSNAConfigPMKReauthThreshold = 70; | |
54 | static const int dot11RSNAConfigSATimeout = 60; | |
55 | ||
56 | ||
57 | static inline void wpa_auth_mic_failure_report( | |
58 | struct wpa_authenticator *wpa_auth, const u8 *addr) | |
59 | { | |
60 | if (wpa_auth->cb.mic_failure_report) | |
61 | wpa_auth->cb.mic_failure_report(wpa_auth->cb.ctx, addr); | |
62 | } | |
63 | ||
64 | ||
65 | static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth, | |
66 | const u8 *addr, wpa_eapol_variable var, | |
67 | int value) | |
68 | { | |
69 | if (wpa_auth->cb.set_eapol) | |
70 | wpa_auth->cb.set_eapol(wpa_auth->cb.ctx, addr, var, value); | |
71 | } | |
72 | ||
73 | ||
74 | static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth, | |
75 | const u8 *addr, wpa_eapol_variable var) | |
76 | { | |
77 | if (wpa_auth->cb.get_eapol == NULL) | |
78 | return -1; | |
79 | return wpa_auth->cb.get_eapol(wpa_auth->cb.ctx, addr, var); | |
80 | } | |
81 | ||
82 | ||
83 | static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth, | |
84 | const u8 *addr, const u8 *prev_psk) | |
85 | { | |
86 | if (wpa_auth->cb.get_psk == NULL) | |
87 | return NULL; | |
88 | return wpa_auth->cb.get_psk(wpa_auth->cb.ctx, addr, prev_psk); | |
89 | } | |
90 | ||
91 | ||
92 | static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth, | |
93 | const u8 *addr, u8 *msk, size_t *len) | |
94 | { | |
95 | if (wpa_auth->cb.get_msk == NULL) | |
96 | return -1; | |
97 | return wpa_auth->cb.get_msk(wpa_auth->cb.ctx, addr, msk, len); | |
98 | } | |
99 | ||
100 | ||
101 | static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth, | |
102 | int vlan_id, | |
71934751 | 103 | enum wpa_alg alg, const u8 *addr, int idx, |
6fc6879b JM |
104 | u8 *key, size_t key_len) |
105 | { | |
106 | if (wpa_auth->cb.set_key == NULL) | |
107 | return -1; | |
108 | return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx, | |
109 | key, key_len); | |
110 | } | |
111 | ||
112 | ||
113 | static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth, | |
114 | const u8 *addr, int idx, u8 *seq) | |
115 | { | |
116 | if (wpa_auth->cb.get_seqnum == NULL) | |
117 | return -1; | |
118 | return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq); | |
119 | } | |
120 | ||
121 | ||
6fc6879b JM |
122 | static inline int |
123 | wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr, | |
124 | const u8 *data, size_t data_len, int encrypt) | |
125 | { | |
126 | if (wpa_auth->cb.send_eapol == NULL) | |
127 | return -1; | |
128 | return wpa_auth->cb.send_eapol(wpa_auth->cb.ctx, addr, data, data_len, | |
129 | encrypt); | |
130 | } | |
131 | ||
132 | ||
133 | int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth, | |
134 | int (*cb)(struct wpa_state_machine *sm, void *ctx), | |
135 | void *cb_ctx) | |
136 | { | |
137 | if (wpa_auth->cb.for_each_sta == NULL) | |
138 | return 0; | |
139 | return wpa_auth->cb.for_each_sta(wpa_auth->cb.ctx, cb, cb_ctx); | |
140 | } | |
141 | ||
142 | ||
bf98f7f3 JM |
143 | int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth, |
144 | int (*cb)(struct wpa_authenticator *a, void *ctx), | |
145 | void *cb_ctx) | |
146 | { | |
147 | if (wpa_auth->cb.for_each_auth == NULL) | |
148 | return 0; | |
149 | return wpa_auth->cb.for_each_auth(wpa_auth->cb.ctx, cb, cb_ctx); | |
150 | } | |
151 | ||
152 | ||
6fc6879b JM |
153 | void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr, |
154 | logger_level level, const char *txt) | |
155 | { | |
156 | if (wpa_auth->cb.logger == NULL) | |
157 | return; | |
158 | wpa_auth->cb.logger(wpa_auth->cb.ctx, addr, level, txt); | |
159 | } | |
160 | ||
161 | ||
162 | void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr, | |
163 | logger_level level, const char *fmt, ...) | |
164 | { | |
165 | char *format; | |
166 | int maxlen; | |
167 | va_list ap; | |
168 | ||
169 | if (wpa_auth->cb.logger == NULL) | |
170 | return; | |
171 | ||
172 | maxlen = os_strlen(fmt) + 100; | |
173 | format = os_malloc(maxlen); | |
174 | if (!format) | |
175 | return; | |
176 | ||
177 | va_start(ap, fmt); | |
178 | vsnprintf(format, maxlen, fmt, ap); | |
179 | va_end(ap); | |
180 | ||
181 | wpa_auth_logger(wpa_auth, addr, level, format); | |
182 | ||
183 | os_free(format); | |
184 | } | |
185 | ||
186 | ||
187 | static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth, | |
188 | const u8 *addr) | |
189 | { | |
190 | if (wpa_auth->cb.disconnect == NULL) | |
191 | return; | |
afcc9ea1 | 192 | wpa_printf(MSG_DEBUG, "wpa_sta_disconnect STA " MACSTR, MAC2STR(addr)); |
6fc6879b JM |
193 | wpa_auth->cb.disconnect(wpa_auth->cb.ctx, addr, |
194 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
195 | } | |
196 | ||
197 | ||
198 | static int wpa_use_aes_cmac(struct wpa_state_machine *sm) | |
199 | { | |
56586197 | 200 | int ret = 0; |
6fc6879b | 201 | #ifdef CONFIG_IEEE80211R |
56586197 JM |
202 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) |
203 | ret = 1; | |
6fc6879b | 204 | #endif /* CONFIG_IEEE80211R */ |
56586197 JM |
205 | #ifdef CONFIG_IEEE80211W |
206 | if (wpa_key_mgmt_sha256(sm->wpa_key_mgmt)) | |
207 | ret = 1; | |
208 | #endif /* CONFIG_IEEE80211W */ | |
209 | return ret; | |
6fc6879b JM |
210 | } |
211 | ||
212 | ||
213 | static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx) | |
214 | { | |
215 | struct wpa_authenticator *wpa_auth = eloop_ctx; | |
216 | ||
3642c431 | 217 | if (random_get_bytes(wpa_auth->group->GMK, WPA_GMK_LEN)) { |
6fc6879b JM |
218 | wpa_printf(MSG_ERROR, "Failed to get random data for WPA " |
219 | "initialization."); | |
220 | } else { | |
221 | wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd"); | |
5cb9d5c3 JM |
222 | wpa_hexdump_key(MSG_DEBUG, "GMK", |
223 | wpa_auth->group->GMK, WPA_GMK_LEN); | |
6fc6879b JM |
224 | } |
225 | ||
226 | if (wpa_auth->conf.wpa_gmk_rekey) { | |
227 | eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0, | |
228 | wpa_rekey_gmk, wpa_auth, NULL); | |
229 | } | |
230 | } | |
231 | ||
232 | ||
233 | static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx) | |
234 | { | |
235 | struct wpa_authenticator *wpa_auth = eloop_ctx; | |
236 | struct wpa_group *group; | |
237 | ||
238 | wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK"); | |
239 | for (group = wpa_auth->group; group; group = group->next) { | |
240 | group->GTKReKey = TRUE; | |
241 | do { | |
242 | group->changed = FALSE; | |
243 | wpa_group_sm_step(wpa_auth, group); | |
244 | } while (group->changed); | |
245 | } | |
246 | ||
247 | if (wpa_auth->conf.wpa_group_rekey) { | |
248 | eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, | |
249 | 0, wpa_rekey_gtk, wpa_auth, NULL); | |
250 | } | |
251 | } | |
252 | ||
253 | ||
581a8cde JM |
254 | static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx) |
255 | { | |
256 | struct wpa_authenticator *wpa_auth = eloop_ctx; | |
257 | struct wpa_state_machine *sm = timeout_ctx; | |
258 | ||
259 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK"); | |
260 | wpa_request_new_ptk(sm); | |
261 | wpa_sm_step(sm); | |
262 | } | |
263 | ||
264 | ||
6fc6879b JM |
265 | static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx) |
266 | { | |
267 | if (sm->pmksa == ctx) | |
268 | sm->pmksa = NULL; | |
269 | return 0; | |
270 | } | |
271 | ||
272 | ||
273 | static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry, | |
274 | void *ctx) | |
275 | { | |
276 | struct wpa_authenticator *wpa_auth = ctx; | |
277 | wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry); | |
278 | } | |
279 | ||
280 | ||
e6965d4e | 281 | static void wpa_group_set_key_len(struct wpa_group *group, int cipher) |
6fc6879b | 282 | { |
e6965d4e | 283 | switch (cipher) { |
6fc6879b JM |
284 | case WPA_CIPHER_CCMP: |
285 | group->GTK_len = 16; | |
286 | break; | |
287 | case WPA_CIPHER_TKIP: | |
288 | group->GTK_len = 32; | |
289 | break; | |
290 | case WPA_CIPHER_WEP104: | |
291 | group->GTK_len = 13; | |
292 | break; | |
293 | case WPA_CIPHER_WEP40: | |
294 | group->GTK_len = 5; | |
295 | break; | |
296 | } | |
e6965d4e JM |
297 | } |
298 | ||
299 | ||
1bdb7ab3 JM |
300 | static int wpa_group_init_gmk_and_counter(struct wpa_authenticator *wpa_auth, |
301 | struct wpa_group *group) | |
302 | { | |
303 | u8 buf[ETH_ALEN + 8 + sizeof(group)]; | |
304 | u8 rkey[32]; | |
305 | ||
3642c431 | 306 | if (random_get_bytes(group->GMK, WPA_GMK_LEN) < 0) |
1bdb7ab3 JM |
307 | return -1; |
308 | wpa_hexdump_key(MSG_DEBUG, "GMK", group->GMK, WPA_GMK_LEN); | |
309 | ||
310 | /* | |
311 | * Counter = PRF-256(Random number, "Init Counter", | |
312 | * Local MAC Address || Time) | |
313 | */ | |
314 | os_memcpy(buf, wpa_auth->addr, ETH_ALEN); | |
315 | wpa_get_ntp_timestamp(buf + ETH_ALEN); | |
316 | os_memcpy(buf + ETH_ALEN + 8, &group, sizeof(group)); | |
3642c431 | 317 | if (random_get_bytes(rkey, sizeof(rkey)) < 0) |
1bdb7ab3 JM |
318 | return -1; |
319 | ||
320 | if (sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf), | |
321 | group->Counter, WPA_NONCE_LEN) < 0) | |
322 | return -1; | |
323 | wpa_hexdump_key(MSG_DEBUG, "Key Counter", | |
324 | group->Counter, WPA_NONCE_LEN); | |
325 | ||
326 | return 0; | |
327 | } | |
328 | ||
329 | ||
e6965d4e | 330 | static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth, |
bdffdc5d | 331 | int vlan_id, int delay_init) |
e6965d4e JM |
332 | { |
333 | struct wpa_group *group; | |
e6965d4e JM |
334 | |
335 | group = os_zalloc(sizeof(struct wpa_group)); | |
336 | if (group == NULL) | |
337 | return NULL; | |
338 | ||
339 | group->GTKAuthenticator = TRUE; | |
340 | group->vlan_id = vlan_id; | |
341 | ||
342 | wpa_group_set_key_len(group, wpa_auth->conf.wpa_group); | |
6fc6879b | 343 | |
08704cd8 JM |
344 | if (random_pool_ready() != 1) { |
345 | wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool " | |
346 | "for secure operations - update keys later when " | |
347 | "the first station connects"); | |
348 | } | |
349 | ||
1bdb7ab3 JM |
350 | /* |
351 | * Set initial GMK/Counter value here. The actual values that will be | |
352 | * used in negotiations will be set once the first station tries to | |
353 | * connect. This allows more time for collecting additional randomness | |
354 | * on embedded devices. | |
6fc6879b | 355 | */ |
1bdb7ab3 | 356 | if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0) { |
6fc6879b JM |
357 | wpa_printf(MSG_ERROR, "Failed to get random data for WPA " |
358 | "initialization."); | |
359 | os_free(group); | |
360 | return NULL; | |
361 | } | |
6fc6879b JM |
362 | |
363 | group->GInit = TRUE; | |
bdffdc5d JM |
364 | if (delay_init) { |
365 | wpa_printf(MSG_DEBUG, "WPA: Delay group state machine start " | |
366 | "until Beacon frames have been configured"); | |
367 | /* Initialization is completed in wpa_init_keys(). */ | |
368 | } else { | |
369 | wpa_group_sm_step(wpa_auth, group); | |
370 | group->GInit = FALSE; | |
371 | wpa_group_sm_step(wpa_auth, group); | |
372 | } | |
6fc6879b JM |
373 | |
374 | return group; | |
375 | } | |
376 | ||
377 | ||
378 | /** | |
379 | * wpa_init - Initialize WPA authenticator | |
380 | * @addr: Authenticator address | |
381 | * @conf: Configuration for WPA authenticator | |
a17df5fb | 382 | * @cb: Callback functions for WPA authenticator |
6fc6879b JM |
383 | * Returns: Pointer to WPA authenticator data or %NULL on failure |
384 | */ | |
385 | struct wpa_authenticator * wpa_init(const u8 *addr, | |
386 | struct wpa_auth_config *conf, | |
387 | struct wpa_auth_callbacks *cb) | |
388 | { | |
389 | struct wpa_authenticator *wpa_auth; | |
390 | ||
391 | wpa_auth = os_zalloc(sizeof(struct wpa_authenticator)); | |
392 | if (wpa_auth == NULL) | |
393 | return NULL; | |
394 | os_memcpy(wpa_auth->addr, addr, ETH_ALEN); | |
395 | os_memcpy(&wpa_auth->conf, conf, sizeof(*conf)); | |
396 | os_memcpy(&wpa_auth->cb, cb, sizeof(*cb)); | |
397 | ||
398 | if (wpa_auth_gen_wpa_ie(wpa_auth)) { | |
399 | wpa_printf(MSG_ERROR, "Could not generate WPA IE."); | |
400 | os_free(wpa_auth); | |
401 | return NULL; | |
402 | } | |
403 | ||
bdffdc5d | 404 | wpa_auth->group = wpa_group_init(wpa_auth, 0, 1); |
6fc6879b JM |
405 | if (wpa_auth->group == NULL) { |
406 | os_free(wpa_auth->wpa_ie); | |
407 | os_free(wpa_auth); | |
408 | return NULL; | |
409 | } | |
410 | ||
4bb081f1 JM |
411 | wpa_auth->pmksa = pmksa_cache_auth_init(wpa_auth_pmksa_free_cb, |
412 | wpa_auth); | |
6fc6879b JM |
413 | if (wpa_auth->pmksa == NULL) { |
414 | wpa_printf(MSG_ERROR, "PMKSA cache initialization failed."); | |
415 | os_free(wpa_auth->wpa_ie); | |
416 | os_free(wpa_auth); | |
417 | return NULL; | |
418 | } | |
419 | ||
420 | #ifdef CONFIG_IEEE80211R | |
421 | wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init(); | |
422 | if (wpa_auth->ft_pmk_cache == NULL) { | |
423 | wpa_printf(MSG_ERROR, "FT PMK cache initialization failed."); | |
424 | os_free(wpa_auth->wpa_ie); | |
4bb081f1 | 425 | pmksa_cache_auth_deinit(wpa_auth->pmksa); |
6fc6879b JM |
426 | os_free(wpa_auth); |
427 | return NULL; | |
428 | } | |
429 | #endif /* CONFIG_IEEE80211R */ | |
430 | ||
431 | if (wpa_auth->conf.wpa_gmk_rekey) { | |
432 | eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0, | |
433 | wpa_rekey_gmk, wpa_auth, NULL); | |
434 | } | |
435 | ||
436 | if (wpa_auth->conf.wpa_group_rekey) { | |
437 | eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0, | |
438 | wpa_rekey_gtk, wpa_auth, NULL); | |
439 | } | |
440 | ||
441 | return wpa_auth; | |
442 | } | |
443 | ||
444 | ||
bdffdc5d JM |
445 | int wpa_init_keys(struct wpa_authenticator *wpa_auth) |
446 | { | |
447 | struct wpa_group *group = wpa_auth->group; | |
448 | ||
449 | wpa_printf(MSG_DEBUG, "WPA: Start group state machine to set initial " | |
450 | "keys"); | |
451 | wpa_group_sm_step(wpa_auth, group); | |
452 | group->GInit = FALSE; | |
453 | wpa_group_sm_step(wpa_auth, group); | |
454 | return 0; | |
455 | } | |
456 | ||
457 | ||
6fc6879b JM |
458 | /** |
459 | * wpa_deinit - Deinitialize WPA authenticator | |
460 | * @wpa_auth: Pointer to WPA authenticator data from wpa_init() | |
461 | */ | |
462 | void wpa_deinit(struct wpa_authenticator *wpa_auth) | |
463 | { | |
464 | struct wpa_group *group, *prev; | |
465 | ||
466 | eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL); | |
467 | eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL); | |
468 | ||
469 | #ifdef CONFIG_PEERKEY | |
470 | while (wpa_auth->stsl_negotiations) | |
471 | wpa_stsl_remove(wpa_auth, wpa_auth->stsl_negotiations); | |
472 | #endif /* CONFIG_PEERKEY */ | |
473 | ||
4bb081f1 | 474 | pmksa_cache_auth_deinit(wpa_auth->pmksa); |
6fc6879b JM |
475 | |
476 | #ifdef CONFIG_IEEE80211R | |
477 | wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache); | |
478 | wpa_auth->ft_pmk_cache = NULL; | |
479 | #endif /* CONFIG_IEEE80211R */ | |
480 | ||
481 | os_free(wpa_auth->wpa_ie); | |
482 | ||
483 | group = wpa_auth->group; | |
484 | while (group) { | |
485 | prev = group; | |
486 | group = group->next; | |
487 | os_free(prev); | |
488 | } | |
489 | ||
490 | os_free(wpa_auth); | |
491 | } | |
492 | ||
493 | ||
494 | /** | |
495 | * wpa_reconfig - Update WPA authenticator configuration | |
496 | * @wpa_auth: Pointer to WPA authenticator data from wpa_init() | |
497 | * @conf: Configuration for WPA authenticator | |
498 | */ | |
499 | int wpa_reconfig(struct wpa_authenticator *wpa_auth, | |
500 | struct wpa_auth_config *conf) | |
501 | { | |
e6965d4e | 502 | struct wpa_group *group; |
6fc6879b JM |
503 | if (wpa_auth == NULL) |
504 | return 0; | |
505 | ||
506 | os_memcpy(&wpa_auth->conf, conf, sizeof(*conf)); | |
ad08c363 JM |
507 | if (wpa_auth_gen_wpa_ie(wpa_auth)) { |
508 | wpa_printf(MSG_ERROR, "Could not generate WPA IE."); | |
509 | return -1; | |
510 | } | |
511 | ||
e6965d4e JM |
512 | /* |
513 | * Reinitialize GTK to make sure it is suitable for the new | |
514 | * configuration. | |
515 | */ | |
516 | group = wpa_auth->group; | |
517 | wpa_group_set_key_len(group, wpa_auth->conf.wpa_group); | |
518 | group->GInit = TRUE; | |
519 | wpa_group_sm_step(wpa_auth, group); | |
520 | group->GInit = FALSE; | |
521 | wpa_group_sm_step(wpa_auth, group); | |
522 | ||
6fc6879b JM |
523 | return 0; |
524 | } | |
525 | ||
526 | ||
527 | struct wpa_state_machine * | |
528 | wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr) | |
529 | { | |
530 | struct wpa_state_machine *sm; | |
531 | ||
532 | sm = os_zalloc(sizeof(struct wpa_state_machine)); | |
533 | if (sm == NULL) | |
534 | return NULL; | |
535 | os_memcpy(sm->addr, addr, ETH_ALEN); | |
536 | ||
537 | sm->wpa_auth = wpa_auth; | |
538 | sm->group = wpa_auth->group; | |
539 | ||
540 | return sm; | |
541 | } | |
542 | ||
543 | ||
6f9b5d16 JM |
544 | int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth, |
545 | struct wpa_state_machine *sm) | |
6fc6879b JM |
546 | { |
547 | if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL) | |
6f9b5d16 | 548 | return -1; |
6fc6879b JM |
549 | |
550 | #ifdef CONFIG_IEEE80211R | |
551 | if (sm->ft_completed) { | |
552 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
553 | "FT authentication already completed - do not " | |
554 | "start 4-way handshake"); | |
6f9b5d16 | 555 | return 0; |
6fc6879b JM |
556 | } |
557 | #endif /* CONFIG_IEEE80211R */ | |
558 | ||
559 | if (sm->started) { | |
22a299ee | 560 | os_memset(&sm->key_replay, 0, sizeof(sm->key_replay)); |
6fc6879b | 561 | sm->ReAuthenticationRequest = TRUE; |
6f9b5d16 | 562 | return wpa_sm_step(sm); |
6fc6879b JM |
563 | } |
564 | ||
565 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
566 | "start authentication"); | |
567 | sm->started = 1; | |
568 | ||
569 | sm->Init = TRUE; | |
e4a6ea1d | 570 | if (wpa_sm_step(sm) == 1) |
6f9b5d16 | 571 | return 1; /* should not really happen */ |
6fc6879b JM |
572 | sm->Init = FALSE; |
573 | sm->AuthenticationRequest = TRUE; | |
6f9b5d16 | 574 | return wpa_sm_step(sm); |
6fc6879b JM |
575 | } |
576 | ||
577 | ||
a8d05fca JM |
578 | void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm) |
579 | { | |
580 | /* WPA/RSN was not used - clear WPA state. This is needed if the STA | |
581 | * reassociates back to the same AP while the previous entry for the | |
582 | * STA has not yet been removed. */ | |
583 | if (sm == NULL) | |
584 | return; | |
585 | ||
586 | sm->wpa_key_mgmt = 0; | |
587 | } | |
588 | ||
589 | ||
6fc6879b JM |
590 | static void wpa_free_sta_sm(struct wpa_state_machine *sm) |
591 | { | |
2ade8ef2 JM |
592 | if (sm->GUpdateStationKeys) { |
593 | sm->group->GKeyDoneStations--; | |
594 | sm->GUpdateStationKeys = FALSE; | |
595 | } | |
0f857f43 JM |
596 | #ifdef CONFIG_IEEE80211R |
597 | os_free(sm->assoc_resp_ftie); | |
598 | #endif /* CONFIG_IEEE80211R */ | |
6fc6879b JM |
599 | os_free(sm->last_rx_eapol_key); |
600 | os_free(sm->wpa_ie); | |
601 | os_free(sm); | |
602 | } | |
603 | ||
604 | ||
605 | void wpa_auth_sta_deinit(struct wpa_state_machine *sm) | |
606 | { | |
607 | if (sm == NULL) | |
608 | return; | |
609 | ||
610 | if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) { | |
611 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
612 | "strict rekeying - force GTK rekey since STA " | |
613 | "is leaving"); | |
614 | eloop_cancel_timeout(wpa_rekey_gtk, sm->wpa_auth, NULL); | |
615 | eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth, | |
616 | NULL); | |
617 | } | |
618 | ||
619 | eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm); | |
e4bf4db9 | 620 | sm->pending_1_of_4_timeout = 0; |
6fc6879b | 621 | eloop_cancel_timeout(wpa_sm_call_step, sm, NULL); |
581a8cde | 622 | eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm); |
6fc6879b JM |
623 | if (sm->in_step_loop) { |
624 | /* Must not free state machine while wpa_sm_step() is running. | |
625 | * Freeing will be completed in the end of wpa_sm_step(). */ | |
626 | wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state " | |
627 | "machine deinit for " MACSTR, MAC2STR(sm->addr)); | |
628 | sm->pending_deinit = 1; | |
629 | } else | |
630 | wpa_free_sta_sm(sm); | |
631 | } | |
632 | ||
633 | ||
634 | static void wpa_request_new_ptk(struct wpa_state_machine *sm) | |
635 | { | |
636 | if (sm == NULL) | |
637 | return; | |
638 | ||
639 | sm->PTKRequest = TRUE; | |
640 | sm->PTK_valid = 0; | |
641 | } | |
642 | ||
643 | ||
68921e24 | 644 | static int wpa_replay_counter_valid(struct wpa_key_replay_counter *ctr, |
22a299ee JM |
645 | const u8 *replay_counter) |
646 | { | |
647 | int i; | |
648 | for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) { | |
68921e24 | 649 | if (!ctr[i].valid) |
22a299ee | 650 | break; |
68921e24 | 651 | if (os_memcmp(replay_counter, ctr[i].counter, |
22a299ee JM |
652 | WPA_REPLAY_COUNTER_LEN) == 0) |
653 | return 1; | |
654 | } | |
655 | return 0; | |
656 | } | |
657 | ||
658 | ||
68921e24 JM |
659 | static void wpa_replay_counter_mark_invalid(struct wpa_key_replay_counter *ctr, |
660 | const u8 *replay_counter) | |
661 | { | |
662 | int i; | |
663 | for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) { | |
664 | if (ctr[i].valid && | |
665 | (replay_counter == NULL || | |
666 | os_memcmp(replay_counter, ctr[i].counter, | |
667 | WPA_REPLAY_COUNTER_LEN) == 0)) | |
668 | ctr[i].valid = FALSE; | |
669 | } | |
670 | } | |
671 | ||
672 | ||
0f857f43 JM |
673 | #ifdef CONFIG_IEEE80211R |
674 | static int ft_check_msg_2_of_4(struct wpa_authenticator *wpa_auth, | |
675 | struct wpa_state_machine *sm, | |
676 | struct wpa_eapol_ie_parse *kde) | |
677 | { | |
678 | struct wpa_ie_data ie; | |
679 | struct rsn_mdie *mdie; | |
680 | ||
681 | if (wpa_parse_wpa_ie_rsn(kde->rsn_ie, kde->rsn_ie_len, &ie) < 0 || | |
682 | ie.num_pmkid != 1 || ie.pmkid == NULL) { | |
683 | wpa_printf(MSG_DEBUG, "FT: No PMKR1Name in " | |
684 | "FT 4-way handshake message 2/4"); | |
685 | return -1; | |
686 | } | |
687 | ||
688 | os_memcpy(sm->sup_pmk_r1_name, ie.pmkid, PMKID_LEN); | |
689 | wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Supplicant", | |
690 | sm->sup_pmk_r1_name, PMKID_LEN); | |
691 | ||
692 | if (!kde->mdie || !kde->ftie) { | |
693 | wpa_printf(MSG_DEBUG, "FT: No %s in FT 4-way handshake " | |
694 | "message 2/4", kde->mdie ? "FTIE" : "MDIE"); | |
695 | return -1; | |
696 | } | |
697 | ||
698 | mdie = (struct rsn_mdie *) (kde->mdie + 2); | |
699 | if (kde->mdie[1] < sizeof(struct rsn_mdie) || | |
700 | os_memcmp(wpa_auth->conf.mobility_domain, mdie->mobility_domain, | |
701 | MOBILITY_DOMAIN_ID_LEN) != 0) { | |
702 | wpa_printf(MSG_DEBUG, "FT: MDIE mismatch"); | |
703 | return -1; | |
704 | } | |
705 | ||
706 | if (sm->assoc_resp_ftie && | |
707 | (kde->ftie[1] != sm->assoc_resp_ftie[1] || | |
708 | os_memcmp(kde->ftie, sm->assoc_resp_ftie, | |
709 | 2 + sm->assoc_resp_ftie[1]) != 0)) { | |
710 | wpa_printf(MSG_DEBUG, "FT: FTIE mismatch"); | |
711 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 2/4", | |
712 | kde->ftie, kde->ftie_len); | |
713 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)AssocResp", | |
714 | sm->assoc_resp_ftie, 2 + sm->assoc_resp_ftie[1]); | |
715 | return -1; | |
716 | } | |
717 | ||
718 | return 0; | |
719 | } | |
720 | #endif /* CONFIG_IEEE80211R */ | |
721 | ||
722 | ||
ec027805 JM |
723 | static void wpa_receive_error_report(struct wpa_authenticator *wpa_auth, |
724 | struct wpa_state_machine *sm, int group) | |
725 | { | |
726 | /* Supplicant reported a Michael MIC error */ | |
727 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
728 | "received EAPOL-Key Error Request " | |
729 | "(STA detected Michael MIC failure (group=%d))", | |
730 | group); | |
fbc72d32 JM |
731 | |
732 | if (group && wpa_auth->conf.wpa_group != WPA_CIPHER_TKIP) { | |
733 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
734 | "ignore Michael MIC failure report since " | |
735 | "group cipher is not TKIP"); | |
736 | } else if (!group && sm->pairwise != WPA_CIPHER_TKIP) { | |
737 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
738 | "ignore Michael MIC failure report since " | |
739 | "pairwise cipher is not TKIP"); | |
740 | } else { | |
741 | wpa_auth_mic_failure_report(wpa_auth, sm->addr); | |
742 | sm->dot11RSNAStatsTKIPRemoteMICFailures++; | |
743 | wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++; | |
744 | } | |
ec027805 JM |
745 | |
746 | /* | |
747 | * Error report is not a request for a new key handshake, but since | |
748 | * Authenticator may do it, let's change the keys now anyway. | |
749 | */ | |
750 | wpa_request_new_ptk(sm); | |
751 | } | |
752 | ||
753 | ||
6fc6879b JM |
754 | void wpa_receive(struct wpa_authenticator *wpa_auth, |
755 | struct wpa_state_machine *sm, | |
756 | u8 *data, size_t data_len) | |
757 | { | |
758 | struct ieee802_1x_hdr *hdr; | |
759 | struct wpa_eapol_key *key; | |
760 | u16 key_info, key_data_length; | |
761 | enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST, | |
762 | SMK_M1, SMK_M3, SMK_ERROR } msg; | |
763 | char *msgtxt; | |
764 | struct wpa_eapol_ie_parse kde; | |
26e23750 | 765 | int ft; |
1566ec46 JM |
766 | const u8 *eapol_key_ie; |
767 | size_t eapol_key_ie_len; | |
6fc6879b JM |
768 | |
769 | if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL) | |
770 | return; | |
771 | ||
772 | if (data_len < sizeof(*hdr) + sizeof(*key)) | |
773 | return; | |
774 | ||
775 | hdr = (struct ieee802_1x_hdr *) data; | |
776 | key = (struct wpa_eapol_key *) (hdr + 1); | |
777 | key_info = WPA_GET_BE16(key->key_info); | |
778 | key_data_length = WPA_GET_BE16(key->key_data_length); | |
0d442aff JM |
779 | wpa_printf(MSG_DEBUG, "WPA: Received EAPOL-Key from " MACSTR |
780 | " key_info=0x%x type=%u key_data_length=%u", | |
781 | MAC2STR(sm->addr), key_info, key->type, key_data_length); | |
6fc6879b JM |
782 | if (key_data_length > data_len - sizeof(*hdr) - sizeof(*key)) { |
783 | wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - " | |
784 | "key_data overflow (%d > %lu)", | |
785 | key_data_length, | |
786 | (unsigned long) (data_len - sizeof(*hdr) - | |
787 | sizeof(*key))); | |
788 | return; | |
789 | } | |
790 | ||
f8e96eb6 | 791 | if (sm->wpa == WPA_VERSION_WPA2) { |
74590e71 JM |
792 | if (key->type == EAPOL_KEY_TYPE_WPA) { |
793 | /* | |
794 | * Some deployed station implementations seem to send | |
795 | * msg 4/4 with incorrect type value in WPA2 mode. | |
796 | */ | |
797 | wpa_printf(MSG_DEBUG, "Workaround: Allow EAPOL-Key " | |
798 | "with unexpected WPA type in RSN mode"); | |
799 | } else if (key->type != EAPOL_KEY_TYPE_RSN) { | |
f8e96eb6 JM |
800 | wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with " |
801 | "unexpected type %d in RSN mode", | |
802 | key->type); | |
803 | return; | |
804 | } | |
805 | } else { | |
806 | if (key->type != EAPOL_KEY_TYPE_WPA) { | |
807 | wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with " | |
808 | "unexpected type %d in WPA mode", | |
809 | key->type); | |
810 | return; | |
811 | } | |
812 | } | |
813 | ||
bc8318ac JM |
814 | wpa_hexdump(MSG_DEBUG, "WPA: Received Key Nonce", key->key_nonce, |
815 | WPA_NONCE_LEN); | |
816 | wpa_hexdump(MSG_DEBUG, "WPA: Received Replay Counter", | |
817 | key->replay_counter, WPA_REPLAY_COUNTER_LEN); | |
818 | ||
6fc6879b JM |
819 | /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys |
820 | * are set */ | |
821 | ||
822 | if ((key_info & (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) == | |
823 | (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) { | |
824 | if (key_info & WPA_KEY_INFO_ERROR) { | |
825 | msg = SMK_ERROR; | |
826 | msgtxt = "SMK Error"; | |
827 | } else { | |
828 | msg = SMK_M1; | |
829 | msgtxt = "SMK M1"; | |
830 | } | |
831 | } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) { | |
832 | msg = SMK_M3; | |
833 | msgtxt = "SMK M3"; | |
834 | } else if (key_info & WPA_KEY_INFO_REQUEST) { | |
835 | msg = REQUEST; | |
836 | msgtxt = "Request"; | |
837 | } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) { | |
838 | msg = GROUP_2; | |
839 | msgtxt = "2/2 Group"; | |
840 | } else if (key_data_length == 0) { | |
841 | msg = PAIRWISE_4; | |
842 | msgtxt = "4/4 Pairwise"; | |
843 | } else { | |
844 | msg = PAIRWISE_2; | |
845 | msgtxt = "2/4 Pairwise"; | |
846 | } | |
847 | ||
848 | /* TODO: key_info type validation for PeerKey */ | |
849 | if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 || | |
850 | msg == GROUP_2) { | |
851 | u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK; | |
852 | if (sm->pairwise == WPA_CIPHER_CCMP) { | |
853 | if (wpa_use_aes_cmac(sm) && | |
854 | ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) { | |
855 | wpa_auth_logger(wpa_auth, sm->addr, | |
856 | LOGGER_WARNING, | |
857 | "advertised support for " | |
858 | "AES-128-CMAC, but did not " | |
859 | "use it"); | |
860 | return; | |
861 | } | |
862 | ||
863 | if (!wpa_use_aes_cmac(sm) && | |
864 | ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { | |
865 | wpa_auth_logger(wpa_auth, sm->addr, | |
866 | LOGGER_WARNING, | |
867 | "did not use HMAC-SHA1-AES " | |
868 | "with CCMP"); | |
869 | return; | |
870 | } | |
871 | } | |
872 | } | |
873 | ||
874 | if (key_info & WPA_KEY_INFO_REQUEST) { | |
875 | if (sm->req_replay_counter_used && | |
876 | os_memcmp(key->replay_counter, sm->req_replay_counter, | |
877 | WPA_REPLAY_COUNTER_LEN) <= 0) { | |
878 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING, | |
879 | "received EAPOL-Key request with " | |
880 | "replayed counter"); | |
881 | return; | |
882 | } | |
883 | } | |
884 | ||
885 | if (!(key_info & WPA_KEY_INFO_REQUEST) && | |
68921e24 | 886 | !wpa_replay_counter_valid(sm->key_replay, key->replay_counter)) { |
22a299ee | 887 | int i; |
68921e24 JM |
888 | |
889 | if (msg == PAIRWISE_2 && | |
890 | wpa_replay_counter_valid(sm->prev_key_replay, | |
891 | key->replay_counter) && | |
892 | sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING && | |
893 | os_memcmp(sm->SNonce, key->key_nonce, WPA_NONCE_LEN) != 0) | |
894 | { | |
895 | /* | |
896 | * Some supplicant implementations (e.g., Windows XP | |
897 | * WZC) update SNonce for each EAPOL-Key 2/4. This | |
898 | * breaks the workaround on accepting any of the | |
899 | * pending requests, so allow the SNonce to be updated | |
900 | * even if we have already sent out EAPOL-Key 3/4. | |
901 | */ | |
902 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
903 | "Process SNonce update from STA " | |
904 | "based on retransmitted EAPOL-Key " | |
905 | "1/4"); | |
906 | sm->update_snonce = 1; | |
907 | wpa_replay_counter_mark_invalid(sm->prev_key_replay, | |
908 | key->replay_counter); | |
909 | goto continue_processing; | |
910 | } | |
911 | ||
912 | if (msg == PAIRWISE_2 && | |
913 | wpa_replay_counter_valid(sm->prev_key_replay, | |
914 | key->replay_counter) && | |
915 | sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING) { | |
916 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
917 | "ignore retransmitted EAPOL-Key %s - " | |
918 | "SNonce did not change", msgtxt); | |
919 | } else { | |
920 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
921 | "received EAPOL-Key %s with " | |
922 | "unexpected replay counter", msgtxt); | |
923 | } | |
22a299ee JM |
924 | for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) { |
925 | if (!sm->key_replay[i].valid) | |
926 | break; | |
927 | wpa_hexdump(MSG_DEBUG, "pending replay counter", | |
928 | sm->key_replay[i].counter, | |
929 | WPA_REPLAY_COUNTER_LEN); | |
930 | } | |
6fc6879b JM |
931 | wpa_hexdump(MSG_DEBUG, "received replay counter", |
932 | key->replay_counter, WPA_REPLAY_COUNTER_LEN); | |
933 | return; | |
934 | } | |
935 | ||
68921e24 | 936 | continue_processing: |
6fc6879b JM |
937 | switch (msg) { |
938 | case PAIRWISE_2: | |
939 | if (sm->wpa_ptk_state != WPA_PTK_PTKSTART && | |
68921e24 JM |
940 | sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING && |
941 | (!sm->update_snonce || | |
942 | sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING)) { | |
6fc6879b JM |
943 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, |
944 | "received EAPOL-Key msg 2/4 in " | |
945 | "invalid state (%d) - dropped", | |
946 | sm->wpa_ptk_state); | |
947 | return; | |
948 | } | |
bbb921da | 949 | random_add_randomness(key->key_nonce, WPA_NONCE_LEN); |
08704cd8 JM |
950 | if (sm->group->reject_4way_hs_for_entropy) { |
951 | /* | |
952 | * The system did not have enough entropy to generate | |
953 | * strong random numbers. Reject the first 4-way | |
954 | * handshake(s) and collect some entropy based on the | |
955 | * information from it. Once enough entropy is | |
956 | * available, the next atempt will trigger GMK/Key | |
957 | * Counter update and the station will be allowed to | |
958 | * continue. | |
959 | */ | |
960 | wpa_printf(MSG_DEBUG, "WPA: Reject 4-way handshake to " | |
961 | "collect more entropy for random number " | |
962 | "generation"); | |
08704cd8 | 963 | random_mark_pool_ready(); |
08704cd8 JM |
964 | wpa_sta_disconnect(wpa_auth, sm->addr); |
965 | return; | |
966 | } | |
1566ec46 JM |
967 | if (wpa_parse_kde_ies((u8 *) (key + 1), key_data_length, |
968 | &kde) < 0) { | |
969 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
970 | "received EAPOL-Key msg 2/4 with " | |
971 | "invalid Key Data contents"); | |
972 | return; | |
973 | } | |
974 | if (kde.rsn_ie) { | |
975 | eapol_key_ie = kde.rsn_ie; | |
976 | eapol_key_ie_len = kde.rsn_ie_len; | |
977 | } else { | |
978 | eapol_key_ie = kde.wpa_ie; | |
979 | eapol_key_ie_len = kde.wpa_ie_len; | |
980 | } | |
26e23750 JM |
981 | ft = sm->wpa == WPA_VERSION_WPA2 && |
982 | wpa_key_mgmt_ft(sm->wpa_key_mgmt); | |
6fc6879b | 983 | if (sm->wpa_ie == NULL || |
26e23750 JM |
984 | wpa_compare_rsn_ie(ft, |
985 | sm->wpa_ie, sm->wpa_ie_len, | |
1566ec46 | 986 | eapol_key_ie, eapol_key_ie_len)) { |
6fc6879b JM |
987 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, |
988 | "WPA IE from (Re)AssocReq did not " | |
989 | "match with msg 2/4"); | |
990 | if (sm->wpa_ie) { | |
991 | wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq", | |
992 | sm->wpa_ie, sm->wpa_ie_len); | |
993 | } | |
994 | wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4", | |
1566ec46 | 995 | eapol_key_ie, eapol_key_ie_len); |
6fc6879b JM |
996 | /* MLME-DEAUTHENTICATE.request */ |
997 | wpa_sta_disconnect(wpa_auth, sm->addr); | |
998 | return; | |
999 | } | |
26e23750 | 1000 | #ifdef CONFIG_IEEE80211R |
0f857f43 JM |
1001 | if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) { |
1002 | wpa_sta_disconnect(wpa_auth, sm->addr); | |
1003 | return; | |
26e23750 JM |
1004 | } |
1005 | #endif /* CONFIG_IEEE80211R */ | |
6fc6879b JM |
1006 | break; |
1007 | case PAIRWISE_4: | |
1008 | if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING || | |
1009 | !sm->PTK_valid) { | |
1010 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
1011 | "received EAPOL-Key msg 4/4 in " | |
1012 | "invalid state (%d) - dropped", | |
1013 | sm->wpa_ptk_state); | |
1014 | return; | |
1015 | } | |
1016 | break; | |
1017 | case GROUP_2: | |
1018 | if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING | |
1019 | || !sm->PTK_valid) { | |
1020 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
1021 | "received EAPOL-Key msg 2/2 in " | |
1022 | "invalid state (%d) - dropped", | |
1023 | sm->wpa_ptk_group_state); | |
1024 | return; | |
1025 | } | |
1026 | break; | |
1027 | #ifdef CONFIG_PEERKEY | |
1028 | case SMK_M1: | |
1029 | case SMK_M3: | |
1030 | case SMK_ERROR: | |
1031 | if (!wpa_auth->conf.peerkey) { | |
1032 | wpa_printf(MSG_DEBUG, "RSN: SMK M1/M3/Error, but " | |
1033 | "PeerKey use disabled - ignoring message"); | |
1034 | return; | |
1035 | } | |
1036 | if (!sm->PTK_valid) { | |
1037 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1038 | "received EAPOL-Key msg SMK in " | |
1039 | "invalid state - dropped"); | |
1040 | return; | |
1041 | } | |
1042 | break; | |
1043 | #else /* CONFIG_PEERKEY */ | |
1044 | case SMK_M1: | |
1045 | case SMK_M3: | |
1046 | case SMK_ERROR: | |
1047 | return; /* STSL disabled - ignore SMK messages */ | |
1048 | #endif /* CONFIG_PEERKEY */ | |
1049 | case REQUEST: | |
1050 | break; | |
1051 | } | |
1052 | ||
1053 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1054 | "received EAPOL-Key frame (%s)", msgtxt); | |
1055 | ||
1056 | if (key_info & WPA_KEY_INFO_ACK) { | |
1057 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1058 | "received invalid EAPOL-Key: Key Ack set"); | |
1059 | return; | |
1060 | } | |
1061 | ||
1062 | if (!(key_info & WPA_KEY_INFO_MIC)) { | |
1063 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1064 | "received invalid EAPOL-Key: Key MIC not set"); | |
1065 | return; | |
1066 | } | |
1067 | ||
1068 | sm->MICVerified = FALSE; | |
68921e24 | 1069 | if (sm->PTK_valid && !sm->update_snonce) { |
6fc6879b JM |
1070 | if (wpa_verify_key_mic(&sm->PTK, data, data_len)) { |
1071 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1072 | "received EAPOL-Key with invalid MIC"); | |
1073 | return; | |
1074 | } | |
1075 | sm->MICVerified = TRUE; | |
1076 | eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm); | |
e4bf4db9 | 1077 | sm->pending_1_of_4_timeout = 0; |
6fc6879b JM |
1078 | } |
1079 | ||
1080 | if (key_info & WPA_KEY_INFO_REQUEST) { | |
1081 | if (sm->MICVerified) { | |
1082 | sm->req_replay_counter_used = 1; | |
1083 | os_memcpy(sm->req_replay_counter, key->replay_counter, | |
1084 | WPA_REPLAY_COUNTER_LEN); | |
1085 | } else { | |
1086 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1087 | "received EAPOL-Key request with " | |
1088 | "invalid MIC"); | |
1089 | return; | |
1090 | } | |
1091 | ||
1092 | /* | |
1093 | * TODO: should decrypt key data field if encryption was used; | |
1094 | * even though MAC address KDE is not normally encrypted, | |
1095 | * supplicant is allowed to encrypt it. | |
1096 | */ | |
1097 | if (msg == SMK_ERROR) { | |
1098 | #ifdef CONFIG_PEERKEY | |
1099 | wpa_smk_error(wpa_auth, sm, key); | |
1100 | #endif /* CONFIG_PEERKEY */ | |
1101 | return; | |
1102 | } else if (key_info & WPA_KEY_INFO_ERROR) { | |
ec027805 JM |
1103 | wpa_receive_error_report( |
1104 | wpa_auth, sm, | |
1105 | !(key_info & WPA_KEY_INFO_KEY_TYPE)); | |
6fc6879b JM |
1106 | } else if (key_info & WPA_KEY_INFO_KEY_TYPE) { |
1107 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1108 | "received EAPOL-Key Request for new " | |
1109 | "4-Way Handshake"); | |
1110 | wpa_request_new_ptk(sm); | |
1111 | #ifdef CONFIG_PEERKEY | |
1112 | } else if (msg == SMK_M1) { | |
1113 | wpa_smk_m1(wpa_auth, sm, key); | |
1114 | #endif /* CONFIG_PEERKEY */ | |
1115 | } else if (key_data_length > 0 && | |
1116 | wpa_parse_kde_ies((const u8 *) (key + 1), | |
1117 | key_data_length, &kde) == 0 && | |
1118 | kde.mac_addr) { | |
1119 | } else { | |
1120 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1121 | "received EAPOL-Key Request for GTK " | |
1122 | "rekeying"); | |
6fc6879b JM |
1123 | eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL); |
1124 | wpa_rekey_gtk(wpa_auth, NULL); | |
1125 | } | |
1126 | } else { | |
68921e24 JM |
1127 | /* Do not allow the same key replay counter to be reused. */ |
1128 | wpa_replay_counter_mark_invalid(sm->key_replay, | |
1129 | key->replay_counter); | |
1130 | ||
1131 | if (msg == PAIRWISE_2) { | |
1132 | /* | |
1133 | * Maintain a copy of the pending EAPOL-Key frames in | |
1134 | * case the EAPOL-Key frame was retransmitted. This is | |
1135 | * needed to allow EAPOL-Key msg 2/4 reply to another | |
1136 | * pending msg 1/4 to update the SNonce to work around | |
1137 | * unexpected supplicant behavior. | |
1138 | */ | |
1139 | os_memcpy(sm->prev_key_replay, sm->key_replay, | |
1140 | sizeof(sm->key_replay)); | |
1141 | } else { | |
1142 | os_memset(sm->prev_key_replay, 0, | |
1143 | sizeof(sm->prev_key_replay)); | |
1144 | } | |
1145 | ||
1146 | /* | |
1147 | * Make sure old valid counters are not accepted anymore and | |
1148 | * do not get copied again. | |
1149 | */ | |
1150 | wpa_replay_counter_mark_invalid(sm->key_replay, NULL); | |
6fc6879b JM |
1151 | } |
1152 | ||
1153 | #ifdef CONFIG_PEERKEY | |
1154 | if (msg == SMK_M3) { | |
1155 | wpa_smk_m3(wpa_auth, sm, key); | |
1156 | return; | |
1157 | } | |
1158 | #endif /* CONFIG_PEERKEY */ | |
1159 | ||
1160 | os_free(sm->last_rx_eapol_key); | |
1161 | sm->last_rx_eapol_key = os_malloc(data_len); | |
1162 | if (sm->last_rx_eapol_key == NULL) | |
1163 | return; | |
1164 | os_memcpy(sm->last_rx_eapol_key, data, data_len); | |
1165 | sm->last_rx_eapol_key_len = data_len; | |
1166 | ||
0d442aff | 1167 | sm->rx_eapol_key_secure = !!(key_info & WPA_KEY_INFO_SECURE); |
6fc6879b JM |
1168 | sm->EAPOLKeyReceived = TRUE; |
1169 | sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE); | |
1170 | sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST); | |
1171 | os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN); | |
1172 | wpa_sm_step(sm); | |
1173 | } | |
1174 | ||
1175 | ||
3c7302c2 JM |
1176 | static int wpa_gmk_to_gtk(const u8 *gmk, const char *label, const u8 *addr, |
1177 | const u8 *gnonce, u8 *gtk, size_t gtk_len) | |
6fc6879b | 1178 | { |
5cb9d5c3 JM |
1179 | u8 data[ETH_ALEN + WPA_NONCE_LEN + 8 + 16]; |
1180 | u8 *pos; | |
3c7302c2 | 1181 | int ret = 0; |
6fc6879b | 1182 | |
5cb9d5c3 JM |
1183 | /* GTK = PRF-X(GMK, "Group key expansion", |
1184 | * AA || GNonce || Time || random data) | |
1185 | * The example described in the IEEE 802.11 standard uses only AA and | |
1186 | * GNonce as inputs here. Add some more entropy since this derivation | |
1187 | * is done only at the Authenticator and as such, does not need to be | |
1188 | * exactly same. | |
1189 | */ | |
6fc6879b JM |
1190 | os_memcpy(data, addr, ETH_ALEN); |
1191 | os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN); | |
5cb9d5c3 JM |
1192 | pos = data + ETH_ALEN + WPA_NONCE_LEN; |
1193 | wpa_get_ntp_timestamp(pos); | |
1194 | pos += 8; | |
3642c431 | 1195 | if (random_get_bytes(pos, 16) < 0) |
3c7302c2 | 1196 | ret = -1; |
6fc6879b | 1197 | |
56586197 | 1198 | #ifdef CONFIG_IEEE80211W |
5cb9d5c3 | 1199 | sha256_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len); |
56586197 | 1200 | #else /* CONFIG_IEEE80211W */ |
3c7302c2 JM |
1201 | if (sha1_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len) |
1202 | < 0) | |
1203 | ret = -1; | |
56586197 | 1204 | #endif /* CONFIG_IEEE80211W */ |
3c7302c2 JM |
1205 | |
1206 | return ret; | |
6fc6879b JM |
1207 | } |
1208 | ||
1209 | ||
1210 | static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx) | |
1211 | { | |
1212 | struct wpa_authenticator *wpa_auth = eloop_ctx; | |
1213 | struct wpa_state_machine *sm = timeout_ctx; | |
1214 | ||
e4bf4db9 | 1215 | sm->pending_1_of_4_timeout = 0; |
6fc6879b JM |
1216 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout"); |
1217 | sm->TimeoutEvt = TRUE; | |
1218 | wpa_sm_step(sm); | |
1219 | } | |
1220 | ||
1221 | ||
1222 | void __wpa_send_eapol(struct wpa_authenticator *wpa_auth, | |
1223 | struct wpa_state_machine *sm, int key_info, | |
1224 | const u8 *key_rsc, const u8 *nonce, | |
1225 | const u8 *kde, size_t kde_len, | |
1226 | int keyidx, int encr, int force_version) | |
1227 | { | |
1228 | struct ieee802_1x_hdr *hdr; | |
1229 | struct wpa_eapol_key *key; | |
1230 | size_t len; | |
1231 | int alg; | |
1232 | int key_data_len, pad_len = 0; | |
1233 | u8 *buf, *pos; | |
1234 | int version, pairwise; | |
22a299ee | 1235 | int i; |
6fc6879b JM |
1236 | |
1237 | len = sizeof(struct ieee802_1x_hdr) + sizeof(struct wpa_eapol_key); | |
1238 | ||
1239 | if (force_version) | |
1240 | version = force_version; | |
1241 | else if (wpa_use_aes_cmac(sm)) | |
1242 | version = WPA_KEY_INFO_TYPE_AES_128_CMAC; | |
1243 | else if (sm->pairwise == WPA_CIPHER_CCMP) | |
1244 | version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES; | |
1245 | else | |
1246 | version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4; | |
1247 | ||
1248 | pairwise = key_info & WPA_KEY_INFO_KEY_TYPE; | |
1249 | ||
1250 | wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d " | |
1251 | "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d " | |
1252 | "encr=%d)", | |
1253 | version, | |
1254 | (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0, | |
1255 | (key_info & WPA_KEY_INFO_MIC) ? 1 : 0, | |
1256 | (key_info & WPA_KEY_INFO_ACK) ? 1 : 0, | |
1257 | (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0, | |
1258 | pairwise, (unsigned long) kde_len, keyidx, encr); | |
1259 | ||
1260 | key_data_len = kde_len; | |
1261 | ||
1262 | if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || | |
1263 | version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) { | |
1264 | pad_len = key_data_len % 8; | |
1265 | if (pad_len) | |
1266 | pad_len = 8 - pad_len; | |
1267 | key_data_len += pad_len + 8; | |
1268 | } | |
1269 | ||
1270 | len += key_data_len; | |
1271 | ||
1272 | hdr = os_zalloc(len); | |
1273 | if (hdr == NULL) | |
1274 | return; | |
1275 | hdr->version = wpa_auth->conf.eapol_version; | |
1276 | hdr->type = IEEE802_1X_TYPE_EAPOL_KEY; | |
1277 | hdr->length = host_to_be16(len - sizeof(*hdr)); | |
1278 | key = (struct wpa_eapol_key *) (hdr + 1); | |
1279 | ||
1280 | key->type = sm->wpa == WPA_VERSION_WPA2 ? | |
1281 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; | |
1282 | key_info |= version; | |
1283 | if (encr && sm->wpa == WPA_VERSION_WPA2) | |
1284 | key_info |= WPA_KEY_INFO_ENCR_KEY_DATA; | |
1285 | if (sm->wpa != WPA_VERSION_WPA2) | |
1286 | key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT; | |
1287 | WPA_PUT_BE16(key->key_info, key_info); | |
1288 | ||
1289 | alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group; | |
1290 | switch (alg) { | |
1291 | case WPA_CIPHER_CCMP: | |
1292 | WPA_PUT_BE16(key->key_length, 16); | |
1293 | break; | |
1294 | case WPA_CIPHER_TKIP: | |
1295 | WPA_PUT_BE16(key->key_length, 32); | |
1296 | break; | |
1297 | case WPA_CIPHER_WEP40: | |
1298 | WPA_PUT_BE16(key->key_length, 5); | |
1299 | break; | |
1300 | case WPA_CIPHER_WEP104: | |
1301 | WPA_PUT_BE16(key->key_length, 13); | |
1302 | break; | |
1303 | } | |
1304 | if (key_info & WPA_KEY_INFO_SMK_MESSAGE) | |
1305 | WPA_PUT_BE16(key->key_length, 0); | |
1306 | ||
1307 | /* FIX: STSL: what to use as key_replay_counter? */ | |
22a299ee JM |
1308 | for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) { |
1309 | sm->key_replay[i].valid = sm->key_replay[i - 1].valid; | |
1310 | os_memcpy(sm->key_replay[i].counter, | |
1311 | sm->key_replay[i - 1].counter, | |
1312 | WPA_REPLAY_COUNTER_LEN); | |
1313 | } | |
1314 | inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN); | |
1315 | os_memcpy(key->replay_counter, sm->key_replay[0].counter, | |
6fc6879b | 1316 | WPA_REPLAY_COUNTER_LEN); |
22a299ee | 1317 | sm->key_replay[0].valid = TRUE; |
6fc6879b JM |
1318 | |
1319 | if (nonce) | |
1320 | os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN); | |
1321 | ||
1322 | if (key_rsc) | |
1323 | os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN); | |
1324 | ||
1325 | if (kde && !encr) { | |
1326 | os_memcpy(key + 1, kde, kde_len); | |
1327 | WPA_PUT_BE16(key->key_data_length, kde_len); | |
1328 | } else if (encr && kde) { | |
1329 | buf = os_zalloc(key_data_len); | |
1330 | if (buf == NULL) { | |
1331 | os_free(hdr); | |
1332 | return; | |
1333 | } | |
1334 | pos = buf; | |
1335 | os_memcpy(pos, kde, kde_len); | |
1336 | pos += kde_len; | |
1337 | ||
1338 | if (pad_len) | |
1339 | *pos++ = 0xdd; | |
1340 | ||
1341 | wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data", | |
1342 | buf, key_data_len); | |
1343 | if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || | |
1344 | version == WPA_KEY_INFO_TYPE_AES_128_CMAC) { | |
1345 | if (aes_wrap(sm->PTK.kek, (key_data_len - 8) / 8, buf, | |
1346 | (u8 *) (key + 1))) { | |
1347 | os_free(hdr); | |
1348 | os_free(buf); | |
1349 | return; | |
1350 | } | |
1351 | WPA_PUT_BE16(key->key_data_length, key_data_len); | |
1352 | } else { | |
1353 | u8 ek[32]; | |
1354 | os_memcpy(key->key_iv, | |
1355 | sm->group->Counter + WPA_NONCE_LEN - 16, 16); | |
1356 | inc_byte_array(sm->group->Counter, WPA_NONCE_LEN); | |
1357 | os_memcpy(ek, key->key_iv, 16); | |
1358 | os_memcpy(ek + 16, sm->PTK.kek, 16); | |
1359 | os_memcpy(key + 1, buf, key_data_len); | |
1360 | rc4_skip(ek, 32, 256, (u8 *) (key + 1), key_data_len); | |
1361 | WPA_PUT_BE16(key->key_data_length, key_data_len); | |
1362 | } | |
1363 | os_free(buf); | |
1364 | } | |
1365 | ||
1366 | if (key_info & WPA_KEY_INFO_MIC) { | |
1367 | if (!sm->PTK_valid) { | |
1368 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1369 | "PTK not valid when sending EAPOL-Key " | |
1370 | "frame"); | |
1371 | os_free(hdr); | |
1372 | return; | |
1373 | } | |
1374 | wpa_eapol_key_mic(sm->PTK.kck, version, (u8 *) hdr, len, | |
1375 | key->key_mic); | |
1376 | } | |
1377 | ||
1378 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx, | |
1379 | 1); | |
1380 | wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len, | |
1381 | sm->pairwise_set); | |
1382 | os_free(hdr); | |
1383 | } | |
1384 | ||
1385 | ||
1386 | static void wpa_send_eapol(struct wpa_authenticator *wpa_auth, | |
1387 | struct wpa_state_machine *sm, int key_info, | |
1388 | const u8 *key_rsc, const u8 *nonce, | |
1389 | const u8 *kde, size_t kde_len, | |
1390 | int keyidx, int encr) | |
1391 | { | |
1392 | int timeout_ms; | |
1393 | int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE; | |
bae61562 | 1394 | int ctr; |
6fc6879b JM |
1395 | |
1396 | if (sm == NULL) | |
1397 | return; | |
1398 | ||
1399 | __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len, | |
1400 | keyidx, encr, 0); | |
1401 | ||
bae61562 | 1402 | ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr; |
e4bf4db9 | 1403 | if (ctr == 1 && wpa_auth->conf.tx_status) |
00338a4f JM |
1404 | timeout_ms = pairwise ? eapol_key_timeout_first : |
1405 | eapol_key_timeout_first_group; | |
bae61562 JM |
1406 | else |
1407 | timeout_ms = eapol_key_timeout_subseq; | |
e4bf4db9 JM |
1408 | if (pairwise && ctr == 1 && !(key_info & WPA_KEY_INFO_MIC)) |
1409 | sm->pending_1_of_4_timeout = 1; | |
1410 | wpa_printf(MSG_DEBUG, "WPA: Use EAPOL-Key timeout of %u ms (retry " | |
1411 | "counter %d)", timeout_ms, ctr); | |
6fc6879b JM |
1412 | eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000, |
1413 | wpa_send_eapol_timeout, wpa_auth, sm); | |
1414 | } | |
1415 | ||
1416 | ||
1417 | static int wpa_verify_key_mic(struct wpa_ptk *PTK, u8 *data, size_t data_len) | |
1418 | { | |
1419 | struct ieee802_1x_hdr *hdr; | |
1420 | struct wpa_eapol_key *key; | |
1421 | u16 key_info; | |
1422 | int ret = 0; | |
1423 | u8 mic[16]; | |
1424 | ||
1425 | if (data_len < sizeof(*hdr) + sizeof(*key)) | |
1426 | return -1; | |
1427 | ||
1428 | hdr = (struct ieee802_1x_hdr *) data; | |
1429 | key = (struct wpa_eapol_key *) (hdr + 1); | |
1430 | key_info = WPA_GET_BE16(key->key_info); | |
1431 | os_memcpy(mic, key->key_mic, 16); | |
1432 | os_memset(key->key_mic, 0, 16); | |
1433 | if (wpa_eapol_key_mic(PTK->kck, key_info & WPA_KEY_INFO_TYPE_MASK, | |
1434 | data, data_len, key->key_mic) || | |
1435 | os_memcmp(mic, key->key_mic, 16) != 0) | |
1436 | ret = -1; | |
1437 | os_memcpy(key->key_mic, mic, 16); | |
1438 | return ret; | |
1439 | } | |
1440 | ||
1441 | ||
1442 | void wpa_remove_ptk(struct wpa_state_machine *sm) | |
1443 | { | |
1444 | sm->PTK_valid = FALSE; | |
1445 | os_memset(&sm->PTK, 0, sizeof(sm->PTK)); | |
26083221 | 1446 | wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, NULL, 0); |
6fc6879b | 1447 | sm->pairwise_set = FALSE; |
581a8cde | 1448 | eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm); |
6fc6879b JM |
1449 | } |
1450 | ||
1451 | ||
6f9b5d16 | 1452 | int wpa_auth_sm_event(struct wpa_state_machine *sm, wpa_event event) |
6fc6879b | 1453 | { |
5d22a1d5 JM |
1454 | int remove_ptk = 1; |
1455 | ||
6fc6879b | 1456 | if (sm == NULL) |
6f9b5d16 | 1457 | return -1; |
6fc6879b JM |
1458 | |
1459 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
1460 | "event %d notification", event); | |
1461 | ||
1462 | switch (event) { | |
1463 | case WPA_AUTH: | |
1464 | case WPA_ASSOC: | |
1465 | break; | |
1466 | case WPA_DEAUTH: | |
1467 | case WPA_DISASSOC: | |
1468 | sm->DeauthenticationRequest = TRUE; | |
1469 | break; | |
1470 | case WPA_REAUTH: | |
1471 | case WPA_REAUTH_EAPOL: | |
3ab72b62 JM |
1472 | if (!sm->started) { |
1473 | /* | |
1474 | * When using WPS, we may end up here if the STA | |
1475 | * manages to re-associate without the previous STA | |
1476 | * entry getting removed. Consequently, we need to make | |
1477 | * sure that the WPA state machines gets initialized | |
1478 | * properly at this point. | |
1479 | */ | |
1480 | wpa_printf(MSG_DEBUG, "WPA state machine had not been " | |
1481 | "started - initialize now"); | |
1482 | sm->started = 1; | |
1483 | sm->Init = TRUE; | |
1484 | if (wpa_sm_step(sm) == 1) | |
1485 | return 1; /* should not really happen */ | |
1486 | sm->Init = FALSE; | |
1487 | sm->AuthenticationRequest = TRUE; | |
1488 | break; | |
1489 | } | |
9663596f JM |
1490 | if (sm->GUpdateStationKeys) { |
1491 | /* | |
1492 | * Reauthentication cancels the pending group key | |
1493 | * update for this STA. | |
1494 | */ | |
1495 | sm->group->GKeyDoneStations--; | |
1496 | sm->GUpdateStationKeys = FALSE; | |
1497 | sm->PtkGroupInit = TRUE; | |
1498 | } | |
6fc6879b JM |
1499 | sm->ReAuthenticationRequest = TRUE; |
1500 | break; | |
1501 | case WPA_ASSOC_FT: | |
1502 | #ifdef CONFIG_IEEE80211R | |
81a658d7 JM |
1503 | wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration " |
1504 | "after association"); | |
1505 | wpa_ft_install_ptk(sm); | |
1506 | ||
6fc6879b JM |
1507 | /* Using FT protocol, not WPA auth state machine */ |
1508 | sm->ft_completed = 1; | |
6f9b5d16 | 1509 | return 0; |
6fc6879b JM |
1510 | #else /* CONFIG_IEEE80211R */ |
1511 | break; | |
1512 | #endif /* CONFIG_IEEE80211R */ | |
1513 | } | |
1514 | ||
1515 | #ifdef CONFIG_IEEE80211R | |
1516 | sm->ft_completed = 0; | |
1517 | #endif /* CONFIG_IEEE80211R */ | |
1518 | ||
5d22a1d5 JM |
1519 | #ifdef CONFIG_IEEE80211W |
1520 | if (sm->mgmt_frame_prot && event == WPA_AUTH) | |
1521 | remove_ptk = 0; | |
1522 | #endif /* CONFIG_IEEE80211W */ | |
6fc6879b | 1523 | |
5d22a1d5 JM |
1524 | if (remove_ptk) { |
1525 | sm->PTK_valid = FALSE; | |
1526 | os_memset(&sm->PTK, 0, sizeof(sm->PTK)); | |
1527 | ||
1528 | if (event != WPA_REAUTH_EAPOL) | |
1529 | wpa_remove_ptk(sm); | |
1530 | } | |
6fc6879b | 1531 | |
6f9b5d16 | 1532 | return wpa_sm_step(sm); |
6fc6879b JM |
1533 | } |
1534 | ||
1535 | ||
71934751 | 1536 | static enum wpa_alg wpa_alg_enum(int alg) |
6fc6879b JM |
1537 | { |
1538 | switch (alg) { | |
1539 | case WPA_CIPHER_CCMP: | |
89d39d9d | 1540 | return WPA_ALG_CCMP; |
6fc6879b | 1541 | case WPA_CIPHER_TKIP: |
89d39d9d | 1542 | return WPA_ALG_TKIP; |
6fc6879b JM |
1543 | case WPA_CIPHER_WEP104: |
1544 | case WPA_CIPHER_WEP40: | |
89d39d9d | 1545 | return WPA_ALG_WEP; |
6fc6879b | 1546 | default: |
89d39d9d | 1547 | return WPA_ALG_NONE; |
6fc6879b JM |
1548 | } |
1549 | } | |
1550 | ||
1551 | ||
1552 | SM_STATE(WPA_PTK, INITIALIZE) | |
1553 | { | |
1554 | SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk); | |
1555 | if (sm->Init) { | |
1556 | /* Init flag is not cleared here, so avoid busy | |
1557 | * loop by claiming nothing changed. */ | |
1558 | sm->changed = FALSE; | |
1559 | } | |
1560 | ||
1561 | sm->keycount = 0; | |
1562 | if (sm->GUpdateStationKeys) | |
1563 | sm->group->GKeyDoneStations--; | |
1564 | sm->GUpdateStationKeys = FALSE; | |
1565 | if (sm->wpa == WPA_VERSION_WPA) | |
1566 | sm->PInitAKeys = FALSE; | |
1567 | if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and | |
1568 | * Local AA > Remote AA)) */) { | |
1569 | sm->Pair = TRUE; | |
1570 | } | |
1571 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0); | |
1572 | wpa_remove_ptk(sm); | |
1573 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0); | |
1574 | sm->TimeoutCtr = 0; | |
56586197 | 1575 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) { |
6fc6879b JM |
1576 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, |
1577 | WPA_EAPOL_authorized, 0); | |
1578 | } | |
1579 | } | |
1580 | ||
1581 | ||
1582 | SM_STATE(WPA_PTK, DISCONNECT) | |
1583 | { | |
1584 | SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk); | |
1585 | sm->Disconnect = FALSE; | |
1586 | wpa_sta_disconnect(sm->wpa_auth, sm->addr); | |
1587 | } | |
1588 | ||
1589 | ||
1590 | SM_STATE(WPA_PTK, DISCONNECTED) | |
1591 | { | |
1592 | SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk); | |
1593 | sm->DeauthenticationRequest = FALSE; | |
1594 | } | |
1595 | ||
1596 | ||
1597 | SM_STATE(WPA_PTK, AUTHENTICATION) | |
1598 | { | |
1599 | SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk); | |
1600 | os_memset(&sm->PTK, 0, sizeof(sm->PTK)); | |
1601 | sm->PTK_valid = FALSE; | |
1602 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto, | |
1603 | 1); | |
1604 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1); | |
1605 | sm->AuthenticationRequest = FALSE; | |
1606 | } | |
1607 | ||
1608 | ||
40d00d2b NC |
1609 | static void wpa_group_ensure_init(struct wpa_authenticator *wpa_auth, |
1610 | struct wpa_group *group) | |
1bdb7ab3 | 1611 | { |
40d00d2b NC |
1612 | if (group->first_sta_seen) |
1613 | return; | |
1bdb7ab3 JM |
1614 | /* |
1615 | * System has run bit further than at the time hostapd was started | |
1616 | * potentially very early during boot up. This provides better chances | |
1617 | * of collecting more randomness on embedded systems. Re-initialize the | |
1618 | * GMK and Counter here to improve their strength if there was not | |
1619 | * enough entropy available immediately after system startup. | |
1620 | */ | |
1621 | wpa_printf(MSG_DEBUG, "WPA: Re-initialize GMK/Counter on first " | |
1622 | "station"); | |
08704cd8 JM |
1623 | if (random_pool_ready() != 1) { |
1624 | wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool " | |
1625 | "to proceed - reject first 4-way handshake"); | |
1626 | group->reject_4way_hs_for_entropy = TRUE; | |
40d00d2b NC |
1627 | } else { |
1628 | group->first_sta_seen = TRUE; | |
1629 | group->reject_4way_hs_for_entropy = FALSE; | |
08704cd8 | 1630 | } |
40d00d2b | 1631 | |
1bdb7ab3 JM |
1632 | wpa_group_init_gmk_and_counter(wpa_auth, group); |
1633 | wpa_gtk_update(wpa_auth, group); | |
1634 | wpa_group_config_group_keys(wpa_auth, group); | |
1635 | } | |
1636 | ||
1637 | ||
6fc6879b JM |
1638 | SM_STATE(WPA_PTK, AUTHENTICATION2) |
1639 | { | |
1640 | SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk); | |
1bdb7ab3 | 1641 | |
40d00d2b | 1642 | wpa_group_ensure_init(sm->wpa_auth, sm->group); |
1bdb7ab3 | 1643 | |
6fc6879b | 1644 | os_memcpy(sm->ANonce, sm->group->Counter, WPA_NONCE_LEN); |
bc8318ac JM |
1645 | wpa_hexdump(MSG_DEBUG, "WPA: Assign ANonce", sm->ANonce, |
1646 | WPA_NONCE_LEN); | |
6fc6879b JM |
1647 | inc_byte_array(sm->group->Counter, WPA_NONCE_LEN); |
1648 | sm->ReAuthenticationRequest = FALSE; | |
1649 | /* IEEE 802.11i does not clear TimeoutCtr here, but this is more | |
1650 | * logical place than INITIALIZE since AUTHENTICATION2 can be | |
1651 | * re-entered on ReAuthenticationRequest without going through | |
1652 | * INITIALIZE. */ | |
1653 | sm->TimeoutCtr = 0; | |
1654 | } | |
1655 | ||
1656 | ||
1657 | SM_STATE(WPA_PTK, INITPMK) | |
1658 | { | |
1659 | u8 msk[2 * PMK_LEN]; | |
1660 | size_t len = 2 * PMK_LEN; | |
1661 | ||
1662 | SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk); | |
1663 | #ifdef CONFIG_IEEE80211R | |
1664 | sm->xxkey_len = 0; | |
1665 | #endif /* CONFIG_IEEE80211R */ | |
1666 | if (sm->pmksa) { | |
1667 | wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache"); | |
1668 | os_memcpy(sm->PMK, sm->pmksa->pmk, PMK_LEN); | |
1669 | } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) { | |
1670 | wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine " | |
1671 | "(len=%lu)", (unsigned long) len); | |
1672 | os_memcpy(sm->PMK, msk, PMK_LEN); | |
1673 | #ifdef CONFIG_IEEE80211R | |
1674 | if (len >= 2 * PMK_LEN) { | |
1675 | os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN); | |
1676 | sm->xxkey_len = PMK_LEN; | |
1677 | } | |
1678 | #endif /* CONFIG_IEEE80211R */ | |
1679 | } else { | |
1680 | wpa_printf(MSG_DEBUG, "WPA: Could not get PMK"); | |
1681 | } | |
1682 | ||
1683 | sm->req_replay_counter_used = 0; | |
1684 | /* IEEE 802.11i does not set keyRun to FALSE, but not doing this | |
1685 | * will break reauthentication since EAPOL state machines may not be | |
1686 | * get into AUTHENTICATING state that clears keyRun before WPA state | |
1687 | * machine enters AUTHENTICATION2 state and goes immediately to INITPMK | |
1688 | * state and takes PMK from the previously used AAA Key. This will | |
1689 | * eventually fail in 4-Way Handshake because Supplicant uses PMK | |
1690 | * derived from the new AAA Key. Setting keyRun = FALSE here seems to | |
1691 | * be good workaround for this issue. */ | |
1692 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0); | |
1693 | } | |
1694 | ||
1695 | ||
1696 | SM_STATE(WPA_PTK, INITPSK) | |
1697 | { | |
1698 | const u8 *psk; | |
1699 | SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk); | |
1700 | psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL); | |
1701 | if (psk) { | |
1702 | os_memcpy(sm->PMK, psk, PMK_LEN); | |
1703 | #ifdef CONFIG_IEEE80211R | |
1704 | os_memcpy(sm->xxkey, psk, PMK_LEN); | |
1705 | sm->xxkey_len = PMK_LEN; | |
1706 | #endif /* CONFIG_IEEE80211R */ | |
1707 | } | |
1708 | sm->req_replay_counter_used = 0; | |
1709 | } | |
1710 | ||
1711 | ||
1712 | SM_STATE(WPA_PTK, PTKSTART) | |
1713 | { | |
1714 | u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL; | |
1715 | size_t pmkid_len = 0; | |
1716 | ||
1717 | SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk); | |
1718 | sm->PTKRequest = FALSE; | |
1719 | sm->TimeoutEvt = FALSE; | |
bae61562 JM |
1720 | |
1721 | sm->TimeoutCtr++; | |
1722 | if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) { | |
1723 | /* No point in sending the EAPOL-Key - we will disconnect | |
1724 | * immediately following this. */ | |
1725 | return; | |
1726 | } | |
1727 | ||
6fc6879b JM |
1728 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, |
1729 | "sending 1/4 msg of 4-Way Handshake"); | |
1730 | /* | |
1731 | * TODO: Could add PMKID even with WPA2-PSK, but only if there is only | |
1732 | * one possible PSK for this STA. | |
1733 | */ | |
1734 | if (sm->wpa == WPA_VERSION_WPA2 && | |
56586197 | 1735 | wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt)) { |
6fc6879b JM |
1736 | pmkid = buf; |
1737 | pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN; | |
1738 | pmkid[0] = WLAN_EID_VENDOR_SPECIFIC; | |
1739 | pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN; | |
1740 | RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID); | |
1741 | if (sm->pmksa) | |
1742 | os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN], | |
1743 | sm->pmksa->pmkid, PMKID_LEN); | |
1744 | else { | |
1745 | /* | |
1746 | * Calculate PMKID since no PMKSA cache entry was | |
1747 | * available with pre-calculated PMKID. | |
1748 | */ | |
1749 | rsn_pmkid(sm->PMK, PMK_LEN, sm->wpa_auth->addr, | |
56586197 JM |
1750 | sm->addr, &pmkid[2 + RSN_SELECTOR_LEN], |
1751 | wpa_key_mgmt_sha256(sm->wpa_key_mgmt)); | |
6fc6879b JM |
1752 | } |
1753 | } | |
1754 | wpa_send_eapol(sm->wpa_auth, sm, | |
1755 | WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL, | |
1756 | sm->ANonce, pmkid, pmkid_len, 0, 0); | |
6fc6879b JM |
1757 | } |
1758 | ||
1759 | ||
1760 | static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *pmk, | |
1761 | struct wpa_ptk *ptk) | |
1762 | { | |
c0a61908 | 1763 | size_t ptk_len = sm->pairwise == WPA_CIPHER_CCMP ? 48 : 64; |
6fc6879b | 1764 | #ifdef CONFIG_IEEE80211R |
56586197 | 1765 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) |
c0a61908 | 1766 | return wpa_auth_derive_ptk_ft(sm, pmk, ptk, ptk_len); |
6fc6879b JM |
1767 | #endif /* CONFIG_IEEE80211R */ |
1768 | ||
1769 | wpa_pmk_to_ptk(pmk, PMK_LEN, "Pairwise key expansion", | |
1770 | sm->wpa_auth->addr, sm->addr, sm->ANonce, sm->SNonce, | |
c0a61908 | 1771 | (u8 *) ptk, ptk_len, |
56586197 | 1772 | wpa_key_mgmt_sha256(sm->wpa_key_mgmt)); |
6fc6879b JM |
1773 | |
1774 | return 0; | |
1775 | } | |
1776 | ||
1777 | ||
1778 | SM_STATE(WPA_PTK, PTKCALCNEGOTIATING) | |
1779 | { | |
1780 | struct wpa_ptk PTK; | |
1781 | int ok = 0; | |
1782 | const u8 *pmk = NULL; | |
1783 | ||
1784 | SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk); | |
1785 | sm->EAPOLKeyReceived = FALSE; | |
68921e24 | 1786 | sm->update_snonce = FALSE; |
6fc6879b JM |
1787 | |
1788 | /* WPA with IEEE 802.1X: use the derived PMK from EAP | |
1789 | * WPA-PSK: iterate through possible PSKs and select the one matching | |
1790 | * the packet */ | |
1791 | for (;;) { | |
56586197 | 1792 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) { |
6fc6879b JM |
1793 | pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, pmk); |
1794 | if (pmk == NULL) | |
1795 | break; | |
1796 | } else | |
1797 | pmk = sm->PMK; | |
1798 | ||
1799 | wpa_derive_ptk(sm, pmk, &PTK); | |
1800 | ||
1801 | if (wpa_verify_key_mic(&PTK, sm->last_rx_eapol_key, | |
1802 | sm->last_rx_eapol_key_len) == 0) { | |
1803 | ok = 1; | |
1804 | break; | |
1805 | } | |
1806 | ||
56586197 | 1807 | if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) |
6fc6879b JM |
1808 | break; |
1809 | } | |
1810 | ||
1811 | if (!ok) { | |
1812 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
1813 | "invalid MIC in msg 2/4 of 4-Way Handshake"); | |
1814 | return; | |
1815 | } | |
1816 | ||
26e23750 JM |
1817 | #ifdef CONFIG_IEEE80211R |
1818 | if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { | |
1819 | /* | |
1820 | * Verify that PMKR1Name from EAPOL-Key message 2/4 matches | |
1821 | * with the value we derived. | |
1822 | */ | |
1823 | if (os_memcmp(sm->sup_pmk_r1_name, sm->pmk_r1_name, | |
1824 | WPA_PMK_NAME_LEN) != 0) { | |
1825 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
1826 | "PMKR1Name mismatch in FT 4-way " | |
1827 | "handshake"); | |
1828 | wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from " | |
1829 | "Supplicant", | |
1830 | sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN); | |
1831 | wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name", | |
1832 | sm->pmk_r1_name, WPA_PMK_NAME_LEN); | |
1833 | return; | |
1834 | } | |
1835 | } | |
1836 | #endif /* CONFIG_IEEE80211R */ | |
1837 | ||
e4bf4db9 | 1838 | sm->pending_1_of_4_timeout = 0; |
6fc6879b JM |
1839 | eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm); |
1840 | ||
56586197 | 1841 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) { |
6fc6879b JM |
1842 | /* PSK may have changed from the previous choice, so update |
1843 | * state machine data based on whatever PSK was selected here. | |
1844 | */ | |
1845 | os_memcpy(sm->PMK, pmk, PMK_LEN); | |
1846 | } | |
1847 | ||
1848 | sm->MICVerified = TRUE; | |
1849 | ||
1850 | os_memcpy(&sm->PTK, &PTK, sizeof(PTK)); | |
1851 | sm->PTK_valid = TRUE; | |
1852 | } | |
1853 | ||
1854 | ||
1855 | SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2) | |
1856 | { | |
1857 | SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk); | |
1858 | sm->TimeoutCtr = 0; | |
1859 | } | |
1860 | ||
1861 | ||
1862 | #ifdef CONFIG_IEEE80211W | |
1863 | ||
1864 | static int ieee80211w_kde_len(struct wpa_state_machine *sm) | |
1865 | { | |
1866 | if (sm->mgmt_frame_prot) { | |
1867 | return 2 + RSN_SELECTOR_LEN + sizeof(struct wpa_igtk_kde); | |
1868 | } | |
1869 | ||
1870 | return 0; | |
1871 | } | |
1872 | ||
1873 | ||
1874 | static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos) | |
1875 | { | |
1876 | struct wpa_igtk_kde igtk; | |
1877 | struct wpa_group *gsm = sm->group; | |
1878 | ||
1879 | if (!sm->mgmt_frame_prot) | |
1880 | return pos; | |
1881 | ||
1882 | igtk.keyid[0] = gsm->GN_igtk; | |
1883 | igtk.keyid[1] = 0; | |
7b1080da JM |
1884 | if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE || |
1885 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, igtk.pn) < 0) | |
6fc6879b JM |
1886 | os_memset(igtk.pn, 0, sizeof(igtk.pn)); |
1887 | os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], WPA_IGTK_LEN); | |
1888 | pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK, | |
1889 | (const u8 *) &igtk, sizeof(igtk), NULL, 0); | |
1890 | ||
1891 | return pos; | |
1892 | } | |
1893 | ||
1894 | #else /* CONFIG_IEEE80211W */ | |
1895 | ||
1896 | static int ieee80211w_kde_len(struct wpa_state_machine *sm) | |
1897 | { | |
1898 | return 0; | |
1899 | } | |
1900 | ||
1901 | ||
1902 | static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos) | |
1903 | { | |
1904 | return pos; | |
1905 | } | |
1906 | ||
1907 | #endif /* CONFIG_IEEE80211W */ | |
1908 | ||
1909 | ||
1910 | SM_STATE(WPA_PTK, PTKINITNEGOTIATING) | |
1911 | { | |
1912 | u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos; | |
1913 | size_t gtk_len, kde_len; | |
1914 | struct wpa_group *gsm = sm->group; | |
1915 | u8 *wpa_ie; | |
1916 | int wpa_ie_len, secure, keyidx, encr = 0; | |
1917 | ||
1918 | SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk); | |
1919 | sm->TimeoutEvt = FALSE; | |
bae61562 JM |
1920 | |
1921 | sm->TimeoutCtr++; | |
1922 | if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) { | |
1923 | /* No point in sending the EAPOL-Key - we will disconnect | |
1924 | * immediately following this. */ | |
1925 | return; | |
1926 | } | |
1927 | ||
86dfabb8 JM |
1928 | /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE], |
1929 | GTK[GN], IGTK, [FTIE], [TIE * 2]) | |
6fc6879b JM |
1930 | */ |
1931 | os_memset(rsc, 0, WPA_KEY_RSC_LEN); | |
1932 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc); | |
86dfabb8 | 1933 | /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */ |
6fc6879b JM |
1934 | wpa_ie = sm->wpa_auth->wpa_ie; |
1935 | wpa_ie_len = sm->wpa_auth->wpa_ie_len; | |
1936 | if (sm->wpa == WPA_VERSION_WPA && | |
1937 | (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) && | |
1938 | wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) { | |
1939 | /* WPA-only STA, remove RSN IE */ | |
1940 | wpa_ie = wpa_ie + wpa_ie[1] + 2; | |
1941 | wpa_ie_len = wpa_ie[1] + 2; | |
1942 | } | |
1943 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
1944 | "sending 3/4 msg of 4-Way Handshake"); | |
1945 | if (sm->wpa == WPA_VERSION_WPA2) { | |
1946 | /* WPA2 send GTK in the 4-way handshake */ | |
1947 | secure = 1; | |
1948 | gtk = gsm->GTK[gsm->GN - 1]; | |
1949 | gtk_len = gsm->GTK_len; | |
1950 | keyidx = gsm->GN; | |
1951 | _rsc = rsc; | |
1952 | encr = 1; | |
1953 | } else { | |
1954 | /* WPA does not include GTK in msg 3/4 */ | |
1955 | secure = 0; | |
1956 | gtk = NULL; | |
1957 | gtk_len = 0; | |
1958 | keyidx = 0; | |
1959 | _rsc = NULL; | |
0d442aff JM |
1960 | if (sm->rx_eapol_key_secure) { |
1961 | /* | |
1962 | * It looks like Windows 7 supplicant tries to use | |
1963 | * Secure bit in msg 2/4 after having reported Michael | |
1964 | * MIC failure and it then rejects the 4-way handshake | |
1965 | * if msg 3/4 does not set Secure bit. Work around this | |
1966 | * by setting the Secure bit here even in the case of | |
1967 | * WPA if the supplicant used it first. | |
1968 | */ | |
1969 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
4740d5b9 JM |
1970 | "STA used Secure bit in WPA msg 2/4 - " |
1971 | "set Secure for 3/4 as workaround"); | |
0d442aff JM |
1972 | secure = 1; |
1973 | } | |
6fc6879b JM |
1974 | } |
1975 | ||
1976 | kde_len = wpa_ie_len + ieee80211w_kde_len(sm); | |
1977 | if (gtk) | |
1978 | kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len; | |
26e23750 | 1979 | #ifdef CONFIG_IEEE80211R |
86dfabb8 JM |
1980 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { |
1981 | kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */ | |
1982 | kde_len += 300; /* FTIE + 2 * TIE */ | |
1983 | } | |
26e23750 | 1984 | #endif /* CONFIG_IEEE80211R */ |
6fc6879b JM |
1985 | kde = os_malloc(kde_len); |
1986 | if (kde == NULL) | |
1987 | return; | |
1988 | ||
1989 | pos = kde; | |
1990 | os_memcpy(pos, wpa_ie, wpa_ie_len); | |
1991 | pos += wpa_ie_len; | |
26e23750 JM |
1992 | #ifdef CONFIG_IEEE80211R |
1993 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { | |
1994 | int res = wpa_insert_pmkid(kde, pos - kde, sm->pmk_r1_name); | |
1995 | if (res < 0) { | |
1996 | wpa_printf(MSG_ERROR, "FT: Failed to insert " | |
1997 | "PMKR1Name into RSN IE in EAPOL-Key data"); | |
1998 | os_free(kde); | |
1999 | return; | |
2000 | } | |
2001 | pos += res; | |
2002 | } | |
2003 | #endif /* CONFIG_IEEE80211R */ | |
6fc6879b JM |
2004 | if (gtk) { |
2005 | u8 hdr[2]; | |
2006 | hdr[0] = keyidx & 0x03; | |
2007 | hdr[1] = 0; | |
2008 | pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2, | |
2009 | gtk, gtk_len); | |
2010 | } | |
2011 | pos = ieee80211w_kde_add(sm, pos); | |
2012 | ||
86dfabb8 JM |
2013 | #ifdef CONFIG_IEEE80211R |
2014 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { | |
2015 | int res; | |
2016 | struct wpa_auth_config *conf; | |
2017 | ||
2018 | conf = &sm->wpa_auth->conf; | |
2019 | res = wpa_write_ftie(conf, conf->r0_key_holder, | |
2020 | conf->r0_key_holder_len, | |
2021 | NULL, NULL, pos, kde + kde_len - pos, | |
2022 | NULL, 0); | |
2023 | if (res < 0) { | |
2024 | wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE " | |
2025 | "into EAPOL-Key Key Data"); | |
2026 | os_free(kde); | |
2027 | return; | |
2028 | } | |
2029 | pos += res; | |
2030 | ||
2031 | /* TIE[ReassociationDeadline] (TU) */ | |
2032 | *pos++ = WLAN_EID_TIMEOUT_INTERVAL; | |
2033 | *pos++ = 5; | |
2034 | *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE; | |
2035 | WPA_PUT_LE32(pos, conf->reassociation_deadline); | |
2036 | pos += 4; | |
2037 | ||
2038 | /* TIE[KeyLifetime] (seconds) */ | |
2039 | *pos++ = WLAN_EID_TIMEOUT_INTERVAL; | |
2040 | *pos++ = 5; | |
2041 | *pos++ = WLAN_TIMEOUT_KEY_LIFETIME; | |
2042 | WPA_PUT_LE32(pos, conf->r0_key_lifetime * 60); | |
2043 | pos += 4; | |
2044 | } | |
2045 | #endif /* CONFIG_IEEE80211R */ | |
2046 | ||
6fc6879b JM |
2047 | wpa_send_eapol(sm->wpa_auth, sm, |
2048 | (secure ? WPA_KEY_INFO_SECURE : 0) | WPA_KEY_INFO_MIC | | |
2049 | WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL | | |
2050 | WPA_KEY_INFO_KEY_TYPE, | |
2051 | _rsc, sm->ANonce, kde, pos - kde, keyidx, encr); | |
2052 | os_free(kde); | |
6fc6879b JM |
2053 | } |
2054 | ||
2055 | ||
2056 | SM_STATE(WPA_PTK, PTKINITDONE) | |
2057 | { | |
2058 | SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk); | |
2059 | sm->EAPOLKeyReceived = FALSE; | |
2060 | if (sm->Pair) { | |
71934751 | 2061 | enum wpa_alg alg; |
6fc6879b JM |
2062 | int klen; |
2063 | if (sm->pairwise == WPA_CIPHER_TKIP) { | |
89d39d9d | 2064 | alg = WPA_ALG_TKIP; |
6fc6879b JM |
2065 | klen = 32; |
2066 | } else { | |
89d39d9d | 2067 | alg = WPA_ALG_CCMP; |
6fc6879b JM |
2068 | klen = 16; |
2069 | } | |
2070 | if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0, | |
2071 | sm->PTK.tk1, klen)) { | |
2072 | wpa_sta_disconnect(sm->wpa_auth, sm->addr); | |
2073 | return; | |
2074 | } | |
2075 | /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */ | |
2076 | sm->pairwise_set = TRUE; | |
2077 | ||
581a8cde JM |
2078 | if (sm->wpa_auth->conf.wpa_ptk_rekey) { |
2079 | eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm); | |
2080 | eloop_register_timeout(sm->wpa_auth->conf. | |
2081 | wpa_ptk_rekey, 0, wpa_rekey_ptk, | |
2082 | sm->wpa_auth, sm); | |
2083 | } | |
2084 | ||
56586197 | 2085 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) { |
6fc6879b JM |
2086 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, |
2087 | WPA_EAPOL_authorized, 1); | |
2088 | } | |
2089 | } | |
2090 | ||
2091 | if (0 /* IBSS == TRUE */) { | |
2092 | sm->keycount++; | |
2093 | if (sm->keycount == 2) { | |
2094 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, | |
2095 | WPA_EAPOL_portValid, 1); | |
2096 | } | |
2097 | } else { | |
2098 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, | |
2099 | 1); | |
2100 | } | |
2101 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0); | |
2102 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1); | |
2103 | if (sm->wpa == WPA_VERSION_WPA) | |
2104 | sm->PInitAKeys = TRUE; | |
2105 | else | |
2106 | sm->has_GTK = TRUE; | |
2107 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO, | |
2108 | "pairwise key handshake completed (%s)", | |
2109 | sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN"); | |
2110 | ||
2111 | #ifdef CONFIG_IEEE80211R | |
2112 | wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr); | |
2113 | #endif /* CONFIG_IEEE80211R */ | |
2114 | } | |
2115 | ||
2116 | ||
2117 | SM_STEP(WPA_PTK) | |
2118 | { | |
2119 | struct wpa_authenticator *wpa_auth = sm->wpa_auth; | |
2120 | ||
2121 | if (sm->Init) | |
2122 | SM_ENTER(WPA_PTK, INITIALIZE); | |
2123 | else if (sm->Disconnect | |
1aae01fc BG |
2124 | /* || FIX: dot11RSNAConfigSALifetime timeout */) { |
2125 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
2126 | "WPA_PTK: sm->Disconnect"); | |
6fc6879b | 2127 | SM_ENTER(WPA_PTK, DISCONNECT); |
1aae01fc | 2128 | } |
6fc6879b JM |
2129 | else if (sm->DeauthenticationRequest) |
2130 | SM_ENTER(WPA_PTK, DISCONNECTED); | |
2131 | else if (sm->AuthenticationRequest) | |
2132 | SM_ENTER(WPA_PTK, AUTHENTICATION); | |
2133 | else if (sm->ReAuthenticationRequest) | |
2134 | SM_ENTER(WPA_PTK, AUTHENTICATION2); | |
2135 | else if (sm->PTKRequest) | |
2136 | SM_ENTER(WPA_PTK, PTKSTART); | |
2137 | else switch (sm->wpa_ptk_state) { | |
2138 | case WPA_PTK_INITIALIZE: | |
2139 | break; | |
2140 | case WPA_PTK_DISCONNECT: | |
2141 | SM_ENTER(WPA_PTK, DISCONNECTED); | |
2142 | break; | |
2143 | case WPA_PTK_DISCONNECTED: | |
2144 | SM_ENTER(WPA_PTK, INITIALIZE); | |
2145 | break; | |
2146 | case WPA_PTK_AUTHENTICATION: | |
2147 | SM_ENTER(WPA_PTK, AUTHENTICATION2); | |
2148 | break; | |
2149 | case WPA_PTK_AUTHENTICATION2: | |
56586197 | 2150 | if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) && |
6fc6879b JM |
2151 | wpa_auth_get_eapol(sm->wpa_auth, sm->addr, |
2152 | WPA_EAPOL_keyRun) > 0) | |
2153 | SM_ENTER(WPA_PTK, INITPMK); | |
56586197 | 2154 | else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) |
6fc6879b JM |
2155 | /* FIX: && 802.1X::keyRun */) |
2156 | SM_ENTER(WPA_PTK, INITPSK); | |
2157 | break; | |
2158 | case WPA_PTK_INITPMK: | |
2159 | if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr, | |
2160 | WPA_EAPOL_keyAvailable) > 0) | |
2161 | SM_ENTER(WPA_PTK, PTKSTART); | |
2162 | else { | |
2163 | wpa_auth->dot11RSNA4WayHandshakeFailures++; | |
1aae01fc BG |
2164 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO, |
2165 | "INITPMK - keyAvailable = false"); | |
6fc6879b JM |
2166 | SM_ENTER(WPA_PTK, DISCONNECT); |
2167 | } | |
2168 | break; | |
2169 | case WPA_PTK_INITPSK: | |
2170 | if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL)) | |
2171 | SM_ENTER(WPA_PTK, PTKSTART); | |
2172 | else { | |
2173 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO, | |
2174 | "no PSK configured for the STA"); | |
2175 | wpa_auth->dot11RSNA4WayHandshakeFailures++; | |
2176 | SM_ENTER(WPA_PTK, DISCONNECT); | |
2177 | } | |
2178 | break; | |
2179 | case WPA_PTK_PTKSTART: | |
2180 | if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest && | |
2181 | sm->EAPOLKeyPairwise) | |
2182 | SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING); | |
2183 | else if (sm->TimeoutCtr > | |
2184 | (int) dot11RSNAConfigPairwiseUpdateCount) { | |
2185 | wpa_auth->dot11RSNA4WayHandshakeFailures++; | |
1aae01fc BG |
2186 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, |
2187 | "PTKSTART: Retry limit %d reached", | |
2188 | dot11RSNAConfigPairwiseUpdateCount); | |
6fc6879b JM |
2189 | SM_ENTER(WPA_PTK, DISCONNECT); |
2190 | } else if (sm->TimeoutEvt) | |
2191 | SM_ENTER(WPA_PTK, PTKSTART); | |
2192 | break; | |
2193 | case WPA_PTK_PTKCALCNEGOTIATING: | |
2194 | if (sm->MICVerified) | |
2195 | SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2); | |
2196 | else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest && | |
2197 | sm->EAPOLKeyPairwise) | |
2198 | SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING); | |
2199 | else if (sm->TimeoutEvt) | |
2200 | SM_ENTER(WPA_PTK, PTKSTART); | |
2201 | break; | |
2202 | case WPA_PTK_PTKCALCNEGOTIATING2: | |
2203 | SM_ENTER(WPA_PTK, PTKINITNEGOTIATING); | |
2204 | break; | |
2205 | case WPA_PTK_PTKINITNEGOTIATING: | |
68921e24 JM |
2206 | if (sm->update_snonce) |
2207 | SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING); | |
2208 | else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest && | |
2209 | sm->EAPOLKeyPairwise && sm->MICVerified) | |
6fc6879b JM |
2210 | SM_ENTER(WPA_PTK, PTKINITDONE); |
2211 | else if (sm->TimeoutCtr > | |
2212 | (int) dot11RSNAConfigPairwiseUpdateCount) { | |
2213 | wpa_auth->dot11RSNA4WayHandshakeFailures++; | |
1aae01fc BG |
2214 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, |
2215 | "PTKINITNEGOTIATING: Retry limit %d " | |
2216 | "reached", | |
2217 | dot11RSNAConfigPairwiseUpdateCount); | |
6fc6879b JM |
2218 | SM_ENTER(WPA_PTK, DISCONNECT); |
2219 | } else if (sm->TimeoutEvt) | |
2220 | SM_ENTER(WPA_PTK, PTKINITNEGOTIATING); | |
2221 | break; | |
2222 | case WPA_PTK_PTKINITDONE: | |
2223 | break; | |
2224 | } | |
2225 | } | |
2226 | ||
2227 | ||
2228 | SM_STATE(WPA_PTK_GROUP, IDLE) | |
2229 | { | |
2230 | SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group); | |
2231 | if (sm->Init) { | |
2232 | /* Init flag is not cleared here, so avoid busy | |
2233 | * loop by claiming nothing changed. */ | |
2234 | sm->changed = FALSE; | |
2235 | } | |
2236 | sm->GTimeoutCtr = 0; | |
2237 | } | |
2238 | ||
2239 | ||
2240 | SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING) | |
2241 | { | |
2242 | u8 rsc[WPA_KEY_RSC_LEN]; | |
2243 | struct wpa_group *gsm = sm->group; | |
2244 | u8 *kde, *pos, hdr[2]; | |
2245 | size_t kde_len; | |
2246 | ||
2247 | SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group); | |
bae61562 JM |
2248 | |
2249 | sm->GTimeoutCtr++; | |
2250 | if (sm->GTimeoutCtr > (int) dot11RSNAConfigGroupUpdateCount) { | |
2251 | /* No point in sending the EAPOL-Key - we will disconnect | |
2252 | * immediately following this. */ | |
2253 | return; | |
2254 | } | |
2255 | ||
6fc6879b JM |
2256 | if (sm->wpa == WPA_VERSION_WPA) |
2257 | sm->PInitAKeys = FALSE; | |
2258 | sm->TimeoutEvt = FALSE; | |
2259 | /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */ | |
2260 | os_memset(rsc, 0, WPA_KEY_RSC_LEN); | |
2261 | if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE) | |
2262 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc); | |
2263 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
2264 | "sending 1/2 msg of Group Key Handshake"); | |
2265 | ||
2266 | if (sm->wpa == WPA_VERSION_WPA2) { | |
2267 | kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len + | |
2268 | ieee80211w_kde_len(sm); | |
2269 | kde = os_malloc(kde_len); | |
2270 | if (kde == NULL) | |
2271 | return; | |
2272 | ||
2273 | pos = kde; | |
2274 | hdr[0] = gsm->GN & 0x03; | |
2275 | hdr[1] = 0; | |
2276 | pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2, | |
2277 | gsm->GTK[gsm->GN - 1], gsm->GTK_len); | |
2278 | pos = ieee80211w_kde_add(sm, pos); | |
2279 | } else { | |
2280 | kde = gsm->GTK[gsm->GN - 1]; | |
2281 | pos = kde + gsm->GTK_len; | |
2282 | } | |
2283 | ||
2284 | wpa_send_eapol(sm->wpa_auth, sm, | |
2285 | WPA_KEY_INFO_SECURE | WPA_KEY_INFO_MIC | | |
2286 | WPA_KEY_INFO_ACK | | |
2287 | (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0), | |
2288 | rsc, gsm->GNonce, kde, pos - kde, gsm->GN, 1); | |
2289 | if (sm->wpa == WPA_VERSION_WPA2) | |
2290 | os_free(kde); | |
6fc6879b JM |
2291 | } |
2292 | ||
2293 | ||
2294 | SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED) | |
2295 | { | |
2296 | SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group); | |
2297 | sm->EAPOLKeyReceived = FALSE; | |
2298 | if (sm->GUpdateStationKeys) | |
2299 | sm->group->GKeyDoneStations--; | |
2300 | sm->GUpdateStationKeys = FALSE; | |
2301 | sm->GTimeoutCtr = 0; | |
2302 | /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */ | |
2303 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO, | |
2304 | "group key handshake completed (%s)", | |
2305 | sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN"); | |
2306 | sm->has_GTK = TRUE; | |
2307 | } | |
2308 | ||
2309 | ||
2310 | SM_STATE(WPA_PTK_GROUP, KEYERROR) | |
2311 | { | |
2312 | SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group); | |
2313 | if (sm->GUpdateStationKeys) | |
2314 | sm->group->GKeyDoneStations--; | |
2315 | sm->GUpdateStationKeys = FALSE; | |
2316 | sm->Disconnect = TRUE; | |
2317 | } | |
2318 | ||
2319 | ||
2320 | SM_STEP(WPA_PTK_GROUP) | |
2321 | { | |
9663596f | 2322 | if (sm->Init || sm->PtkGroupInit) { |
6fc6879b | 2323 | SM_ENTER(WPA_PTK_GROUP, IDLE); |
9663596f JM |
2324 | sm->PtkGroupInit = FALSE; |
2325 | } else switch (sm->wpa_ptk_group_state) { | |
6fc6879b JM |
2326 | case WPA_PTK_GROUP_IDLE: |
2327 | if (sm->GUpdateStationKeys || | |
2328 | (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys)) | |
2329 | SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING); | |
2330 | break; | |
2331 | case WPA_PTK_GROUP_REKEYNEGOTIATING: | |
2332 | if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest && | |
2333 | !sm->EAPOLKeyPairwise && sm->MICVerified) | |
2334 | SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED); | |
2335 | else if (sm->GTimeoutCtr > | |
2336 | (int) dot11RSNAConfigGroupUpdateCount) | |
2337 | SM_ENTER(WPA_PTK_GROUP, KEYERROR); | |
2338 | else if (sm->TimeoutEvt) | |
2339 | SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING); | |
2340 | break; | |
2341 | case WPA_PTK_GROUP_KEYERROR: | |
2342 | SM_ENTER(WPA_PTK_GROUP, IDLE); | |
2343 | break; | |
2344 | case WPA_PTK_GROUP_REKEYESTABLISHED: | |
2345 | SM_ENTER(WPA_PTK_GROUP, IDLE); | |
2346 | break; | |
2347 | } | |
2348 | } | |
2349 | ||
2350 | ||
2351 | static int wpa_gtk_update(struct wpa_authenticator *wpa_auth, | |
2352 | struct wpa_group *group) | |
2353 | { | |
2354 | int ret = 0; | |
2355 | ||
6fc6879b JM |
2356 | os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN); |
2357 | inc_byte_array(group->Counter, WPA_NONCE_LEN); | |
3c7302c2 JM |
2358 | if (wpa_gmk_to_gtk(group->GMK, "Group key expansion", |
2359 | wpa_auth->addr, group->GNonce, | |
2360 | group->GTK[group->GN - 1], group->GTK_len) < 0) | |
2361 | ret = -1; | |
5cb9d5c3 JM |
2362 | wpa_hexdump_key(MSG_DEBUG, "GTK", |
2363 | group->GTK[group->GN - 1], group->GTK_len); | |
6fc6879b JM |
2364 | |
2365 | #ifdef CONFIG_IEEE80211W | |
70f8cc8e | 2366 | if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) { |
5cb9d5c3 JM |
2367 | os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN); |
2368 | inc_byte_array(group->Counter, WPA_NONCE_LEN); | |
3c7302c2 JM |
2369 | if (wpa_gmk_to_gtk(group->GMK, "IGTK key expansion", |
2370 | wpa_auth->addr, group->GNonce, | |
2371 | group->IGTK[group->GN_igtk - 4], | |
2372 | WPA_IGTK_LEN) < 0) | |
2373 | ret = -1; | |
6fc6879b JM |
2374 | wpa_hexdump_key(MSG_DEBUG, "IGTK", |
2375 | group->IGTK[group->GN_igtk - 4], WPA_IGTK_LEN); | |
2376 | } | |
2377 | #endif /* CONFIG_IEEE80211W */ | |
2378 | ||
2379 | return ret; | |
2380 | } | |
2381 | ||
2382 | ||
2383 | static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth, | |
2384 | struct wpa_group *group) | |
2385 | { | |
2386 | wpa_printf(MSG_DEBUG, "WPA: group state machine entering state " | |
2387 | "GTK_INIT (VLAN-ID %d)", group->vlan_id); | |
2388 | group->changed = FALSE; /* GInit is not cleared here; avoid loop */ | |
2389 | group->wpa_group_state = WPA_GROUP_GTK_INIT; | |
2390 | ||
2391 | /* GTK[0..N] = 0 */ | |
2392 | os_memset(group->GTK, 0, sizeof(group->GTK)); | |
2393 | group->GN = 1; | |
2394 | group->GM = 2; | |
2395 | #ifdef CONFIG_IEEE80211W | |
2396 | group->GN_igtk = 4; | |
2397 | group->GM_igtk = 5; | |
2398 | #endif /* CONFIG_IEEE80211W */ | |
2399 | /* GTK[GN] = CalcGTK() */ | |
2400 | wpa_gtk_update(wpa_auth, group); | |
2401 | } | |
2402 | ||
2403 | ||
2404 | static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx) | |
2405 | { | |
2406 | if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) { | |
2407 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
2408 | "Not in PTKINITDONE; skip Group Key update"); | |
3c183894 | 2409 | sm->GUpdateStationKeys = FALSE; |
6fc6879b JM |
2410 | return 0; |
2411 | } | |
9663596f JM |
2412 | if (sm->GUpdateStationKeys) { |
2413 | /* | |
3c183894 JM |
2414 | * This should not really happen, so add a debug log entry. |
2415 | * Since we clear the GKeyDoneStations before the loop, the | |
2416 | * station needs to be counted here anyway. | |
9663596f JM |
2417 | */ |
2418 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
3c183894 JM |
2419 | "GUpdateStationKeys was already set when " |
2420 | "marking station for GTK rekeying"); | |
9663596f | 2421 | } |
3c183894 JM |
2422 | |
2423 | sm->group->GKeyDoneStations++; | |
2424 | sm->GUpdateStationKeys = TRUE; | |
2425 | ||
6fc6879b JM |
2426 | wpa_sm_step(sm); |
2427 | return 0; | |
2428 | } | |
2429 | ||
2430 | ||
2431 | static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth, | |
2432 | struct wpa_group *group) | |
2433 | { | |
2434 | int tmp; | |
2435 | ||
2436 | wpa_printf(MSG_DEBUG, "WPA: group state machine entering state " | |
2437 | "SETKEYS (VLAN-ID %d)", group->vlan_id); | |
2438 | group->changed = TRUE; | |
2439 | group->wpa_group_state = WPA_GROUP_SETKEYS; | |
2440 | group->GTKReKey = FALSE; | |
2441 | tmp = group->GM; | |
2442 | group->GM = group->GN; | |
2443 | group->GN = tmp; | |
2444 | #ifdef CONFIG_IEEE80211W | |
2445 | tmp = group->GM_igtk; | |
2446 | group->GM_igtk = group->GN_igtk; | |
2447 | group->GN_igtk = tmp; | |
2448 | #endif /* CONFIG_IEEE80211W */ | |
2449 | /* "GKeyDoneStations = GNoStations" is done in more robust way by | |
2450 | * counting the STAs that are marked with GUpdateStationKeys instead of | |
2451 | * including all STAs that could be in not-yet-completed state. */ | |
2452 | wpa_gtk_update(wpa_auth, group); | |
2453 | ||
3c183894 JM |
2454 | if (group->GKeyDoneStations) { |
2455 | wpa_printf(MSG_DEBUG, "wpa_group_setkeys: Unexpected " | |
2456 | "GKeyDoneStations=%d when starting new GTK rekey", | |
2457 | group->GKeyDoneStations); | |
2458 | group->GKeyDoneStations = 0; | |
2459 | } | |
6fc6879b JM |
2460 | wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, NULL); |
2461 | wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d", | |
2462 | group->GKeyDoneStations); | |
2463 | } | |
2464 | ||
2465 | ||
1bdb7ab3 JM |
2466 | static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth, |
2467 | struct wpa_group *group) | |
6fc6879b | 2468 | { |
3c7302c2 JM |
2469 | int ret = 0; |
2470 | ||
3c7302c2 JM |
2471 | if (wpa_auth_set_key(wpa_auth, group->vlan_id, |
2472 | wpa_alg_enum(wpa_auth->conf.wpa_group), | |
0382097e JM |
2473 | broadcast_ether_addr, group->GN, |
2474 | group->GTK[group->GN - 1], group->GTK_len) < 0) | |
3c7302c2 | 2475 | ret = -1; |
6fc6879b JM |
2476 | |
2477 | #ifdef CONFIG_IEEE80211W | |
3c7302c2 JM |
2478 | if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION && |
2479 | wpa_auth_set_key(wpa_auth, group->vlan_id, WPA_ALG_IGTK, | |
0382097e | 2480 | broadcast_ether_addr, group->GN_igtk, |
3c7302c2 JM |
2481 | group->IGTK[group->GN_igtk - 4], |
2482 | WPA_IGTK_LEN) < 0) | |
2483 | ret = -1; | |
6fc6879b | 2484 | #endif /* CONFIG_IEEE80211W */ |
3c7302c2 JM |
2485 | |
2486 | return ret; | |
6fc6879b JM |
2487 | } |
2488 | ||
2489 | ||
1bdb7ab3 JM |
2490 | static int wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth, |
2491 | struct wpa_group *group) | |
2492 | { | |
2493 | wpa_printf(MSG_DEBUG, "WPA: group state machine entering state " | |
2494 | "SETKEYSDONE (VLAN-ID %d)", group->vlan_id); | |
2495 | group->changed = TRUE; | |
2496 | group->wpa_group_state = WPA_GROUP_SETKEYSDONE; | |
2497 | ||
2498 | if (wpa_group_config_group_keys(wpa_auth, group) < 0) | |
2499 | return -1; | |
2500 | ||
2501 | return 0; | |
2502 | } | |
2503 | ||
2504 | ||
6fc6879b JM |
2505 | static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth, |
2506 | struct wpa_group *group) | |
2507 | { | |
2508 | if (group->GInit) { | |
2509 | wpa_group_gtk_init(wpa_auth, group); | |
2510 | } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT && | |
2511 | group->GTKAuthenticator) { | |
2512 | wpa_group_setkeysdone(wpa_auth, group); | |
2513 | } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE && | |
2514 | group->GTKReKey) { | |
2515 | wpa_group_setkeys(wpa_auth, group); | |
2516 | } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) { | |
2517 | if (group->GKeyDoneStations == 0) | |
2518 | wpa_group_setkeysdone(wpa_auth, group); | |
2519 | else if (group->GTKReKey) | |
2520 | wpa_group_setkeys(wpa_auth, group); | |
2521 | } | |
2522 | } | |
2523 | ||
2524 | ||
e4a6ea1d | 2525 | static int wpa_sm_step(struct wpa_state_machine *sm) |
6fc6879b JM |
2526 | { |
2527 | if (sm == NULL) | |
e4a6ea1d | 2528 | return 0; |
6fc6879b JM |
2529 | |
2530 | if (sm->in_step_loop) { | |
2531 | /* This should not happen, but if it does, make sure we do not | |
2532 | * end up freeing the state machine too early by exiting the | |
2533 | * recursive call. */ | |
2534 | wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively"); | |
e4a6ea1d | 2535 | return 0; |
6fc6879b JM |
2536 | } |
2537 | ||
2538 | sm->in_step_loop = 1; | |
2539 | do { | |
2540 | if (sm->pending_deinit) | |
2541 | break; | |
2542 | ||
2543 | sm->changed = FALSE; | |
2544 | sm->wpa_auth->group->changed = FALSE; | |
2545 | ||
2546 | SM_STEP_RUN(WPA_PTK); | |
2547 | if (sm->pending_deinit) | |
2548 | break; | |
2549 | SM_STEP_RUN(WPA_PTK_GROUP); | |
2550 | if (sm->pending_deinit) | |
2551 | break; | |
2552 | wpa_group_sm_step(sm->wpa_auth, sm->group); | |
2553 | } while (sm->changed || sm->wpa_auth->group->changed); | |
2554 | sm->in_step_loop = 0; | |
2555 | ||
2556 | if (sm->pending_deinit) { | |
2557 | wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state " | |
2558 | "machine deinit for " MACSTR, MAC2STR(sm->addr)); | |
2559 | wpa_free_sta_sm(sm); | |
e4a6ea1d | 2560 | return 1; |
6fc6879b | 2561 | } |
e4a6ea1d | 2562 | return 0; |
6fc6879b JM |
2563 | } |
2564 | ||
2565 | ||
2566 | static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx) | |
2567 | { | |
2568 | struct wpa_state_machine *sm = eloop_ctx; | |
2569 | wpa_sm_step(sm); | |
2570 | } | |
2571 | ||
2572 | ||
2573 | void wpa_auth_sm_notify(struct wpa_state_machine *sm) | |
2574 | { | |
2575 | if (sm == NULL) | |
2576 | return; | |
2577 | eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL); | |
2578 | } | |
2579 | ||
2580 | ||
2581 | void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth) | |
2582 | { | |
2583 | int tmp, i; | |
2584 | struct wpa_group *group; | |
2585 | ||
2586 | if (wpa_auth == NULL) | |
2587 | return; | |
2588 | ||
2589 | group = wpa_auth->group; | |
2590 | ||
2591 | for (i = 0; i < 2; i++) { | |
2592 | tmp = group->GM; | |
2593 | group->GM = group->GN; | |
2594 | group->GN = tmp; | |
2595 | #ifdef CONFIG_IEEE80211W | |
2596 | tmp = group->GM_igtk; | |
2597 | group->GM_igtk = group->GN_igtk; | |
2598 | group->GN_igtk = tmp; | |
2599 | #endif /* CONFIG_IEEE80211W */ | |
2600 | wpa_gtk_update(wpa_auth, group); | |
9354e594 | 2601 | wpa_group_config_group_keys(wpa_auth, group); |
6fc6879b JM |
2602 | } |
2603 | } | |
2604 | ||
2605 | ||
2606 | static const char * wpa_bool_txt(int bool) | |
2607 | { | |
2608 | return bool ? "TRUE" : "FALSE"; | |
2609 | } | |
2610 | ||
2611 | ||
2612 | static int wpa_cipher_bits(int cipher) | |
2613 | { | |
2614 | switch (cipher) { | |
2615 | case WPA_CIPHER_CCMP: | |
2616 | return 128; | |
2617 | case WPA_CIPHER_TKIP: | |
2618 | return 256; | |
2619 | case WPA_CIPHER_WEP104: | |
2620 | return 104; | |
2621 | case WPA_CIPHER_WEP40: | |
2622 | return 40; | |
2623 | default: | |
2624 | return 0; | |
2625 | } | |
2626 | } | |
2627 | ||
2628 | ||
2629 | #define RSN_SUITE "%02x-%02x-%02x-%d" | |
2630 | #define RSN_SUITE_ARG(s) \ | |
2631 | ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff | |
2632 | ||
2633 | int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen) | |
2634 | { | |
2635 | int len = 0, ret; | |
2636 | char pmkid_txt[PMKID_LEN * 2 + 1]; | |
8ce58ceb IH |
2637 | #ifdef CONFIG_RSN_PREAUTH |
2638 | const int preauth = 1; | |
2639 | #else /* CONFIG_RSN_PREAUTH */ | |
2640 | const int preauth = 0; | |
2641 | #endif /* CONFIG_RSN_PREAUTH */ | |
6fc6879b JM |
2642 | |
2643 | if (wpa_auth == NULL) | |
2644 | return len; | |
2645 | ||
2646 | ret = os_snprintf(buf + len, buflen - len, | |
2647 | "dot11RSNAOptionImplemented=TRUE\n" | |
8ce58ceb | 2648 | "dot11RSNAPreauthenticationImplemented=%s\n" |
6fc6879b JM |
2649 | "dot11RSNAEnabled=%s\n" |
2650 | "dot11RSNAPreauthenticationEnabled=%s\n", | |
8ce58ceb | 2651 | wpa_bool_txt(preauth), |
6fc6879b JM |
2652 | wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN), |
2653 | wpa_bool_txt(wpa_auth->conf.rsn_preauth)); | |
2654 | if (ret < 0 || (size_t) ret >= buflen - len) | |
2655 | return len; | |
2656 | len += ret; | |
2657 | ||
2658 | wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt), | |
2659 | wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN); | |
2660 | ||
2661 | ret = os_snprintf( | |
2662 | buf + len, buflen - len, | |
2663 | "dot11RSNAConfigVersion=%u\n" | |
2664 | "dot11RSNAConfigPairwiseKeysSupported=9999\n" | |
2665 | /* FIX: dot11RSNAConfigGroupCipher */ | |
2666 | /* FIX: dot11RSNAConfigGroupRekeyMethod */ | |
2667 | /* FIX: dot11RSNAConfigGroupRekeyTime */ | |
2668 | /* FIX: dot11RSNAConfigGroupRekeyPackets */ | |
2669 | "dot11RSNAConfigGroupRekeyStrict=%u\n" | |
2670 | "dot11RSNAConfigGroupUpdateCount=%u\n" | |
2671 | "dot11RSNAConfigPairwiseUpdateCount=%u\n" | |
2672 | "dot11RSNAConfigGroupCipherSize=%u\n" | |
2673 | "dot11RSNAConfigPMKLifetime=%u\n" | |
2674 | "dot11RSNAConfigPMKReauthThreshold=%u\n" | |
2675 | "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n" | |
2676 | "dot11RSNAConfigSATimeout=%u\n" | |
2677 | "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n" | |
2678 | "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n" | |
2679 | "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n" | |
2680 | "dot11RSNAPMKIDUsed=%s\n" | |
2681 | "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n" | |
2682 | "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n" | |
2683 | "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n" | |
2684 | "dot11RSNATKIPCounterMeasuresInvoked=%u\n" | |
2685 | "dot11RSNA4WayHandshakeFailures=%u\n" | |
2686 | "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n", | |
2687 | RSN_VERSION, | |
2688 | !!wpa_auth->conf.wpa_strict_rekey, | |
2689 | dot11RSNAConfigGroupUpdateCount, | |
2690 | dot11RSNAConfigPairwiseUpdateCount, | |
2691 | wpa_cipher_bits(wpa_auth->conf.wpa_group), | |
2692 | dot11RSNAConfigPMKLifetime, | |
2693 | dot11RSNAConfigPMKReauthThreshold, | |
2694 | dot11RSNAConfigSATimeout, | |
2695 | RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected), | |
2696 | RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected), | |
2697 | RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected), | |
2698 | pmkid_txt, | |
2699 | RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested), | |
2700 | RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested), | |
2701 | RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested), | |
2702 | wpa_auth->dot11RSNATKIPCounterMeasuresInvoked, | |
2703 | wpa_auth->dot11RSNA4WayHandshakeFailures); | |
2704 | if (ret < 0 || (size_t) ret >= buflen - len) | |
2705 | return len; | |
2706 | len += ret; | |
2707 | ||
2708 | /* TODO: dot11RSNAConfigPairwiseCiphersTable */ | |
2709 | /* TODO: dot11RSNAConfigAuthenticationSuitesTable */ | |
2710 | ||
2711 | /* Private MIB */ | |
2712 | ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n", | |
2713 | wpa_auth->group->wpa_group_state); | |
2714 | if (ret < 0 || (size_t) ret >= buflen - len) | |
2715 | return len; | |
2716 | len += ret; | |
2717 | ||
2718 | return len; | |
2719 | } | |
2720 | ||
2721 | ||
2722 | int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen) | |
2723 | { | |
2724 | int len = 0, ret; | |
2725 | u32 pairwise = 0; | |
2726 | ||
2727 | if (sm == NULL) | |
2728 | return 0; | |
2729 | ||
2730 | /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */ | |
2731 | ||
2732 | /* dot11RSNAStatsEntry */ | |
2733 | ||
2734 | if (sm->wpa == WPA_VERSION_WPA) { | |
2735 | if (sm->pairwise == WPA_CIPHER_CCMP) | |
2736 | pairwise = WPA_CIPHER_SUITE_CCMP; | |
2737 | else if (sm->pairwise == WPA_CIPHER_TKIP) | |
2738 | pairwise = WPA_CIPHER_SUITE_TKIP; | |
2739 | else if (sm->pairwise == WPA_CIPHER_WEP104) | |
2740 | pairwise = WPA_CIPHER_SUITE_WEP104; | |
2741 | else if (sm->pairwise == WPA_CIPHER_WEP40) | |
2742 | pairwise = WPA_CIPHER_SUITE_WEP40; | |
2743 | else if (sm->pairwise == WPA_CIPHER_NONE) | |
2744 | pairwise = WPA_CIPHER_SUITE_NONE; | |
2745 | } else if (sm->wpa == WPA_VERSION_WPA2) { | |
2746 | if (sm->pairwise == WPA_CIPHER_CCMP) | |
2747 | pairwise = RSN_CIPHER_SUITE_CCMP; | |
2748 | else if (sm->pairwise == WPA_CIPHER_TKIP) | |
2749 | pairwise = RSN_CIPHER_SUITE_TKIP; | |
2750 | else if (sm->pairwise == WPA_CIPHER_WEP104) | |
2751 | pairwise = RSN_CIPHER_SUITE_WEP104; | |
2752 | else if (sm->pairwise == WPA_CIPHER_WEP40) | |
2753 | pairwise = RSN_CIPHER_SUITE_WEP40; | |
2754 | else if (sm->pairwise == WPA_CIPHER_NONE) | |
2755 | pairwise = RSN_CIPHER_SUITE_NONE; | |
2756 | } else | |
2757 | return 0; | |
2758 | ||
2759 | ret = os_snprintf( | |
2760 | buf + len, buflen - len, | |
2761 | /* TODO: dot11RSNAStatsIndex */ | |
2762 | "dot11RSNAStatsSTAAddress=" MACSTR "\n" | |
2763 | "dot11RSNAStatsVersion=1\n" | |
2764 | "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n" | |
2765 | /* TODO: dot11RSNAStatsTKIPICVErrors */ | |
2766 | "dot11RSNAStatsTKIPLocalMICFailures=%u\n" | |
d9040cdb | 2767 | "dot11RSNAStatsTKIPRemoteMICFailures=%u\n" |
6fc6879b JM |
2768 | /* TODO: dot11RSNAStatsCCMPReplays */ |
2769 | /* TODO: dot11RSNAStatsCCMPDecryptErrors */ | |
2770 | /* TODO: dot11RSNAStatsTKIPReplays */, | |
2771 | MAC2STR(sm->addr), | |
2772 | RSN_SUITE_ARG(pairwise), | |
2773 | sm->dot11RSNAStatsTKIPLocalMICFailures, | |
2774 | sm->dot11RSNAStatsTKIPRemoteMICFailures); | |
2775 | if (ret < 0 || (size_t) ret >= buflen - len) | |
2776 | return len; | |
2777 | len += ret; | |
2778 | ||
2779 | /* Private MIB */ | |
2780 | ret = os_snprintf(buf + len, buflen - len, | |
2781 | "hostapdWPAPTKState=%d\n" | |
2782 | "hostapdWPAPTKGroupState=%d\n", | |
2783 | sm->wpa_ptk_state, | |
2784 | sm->wpa_ptk_group_state); | |
2785 | if (ret < 0 || (size_t) ret >= buflen - len) | |
2786 | return len; | |
2787 | len += ret; | |
2788 | ||
2789 | return len; | |
2790 | } | |
2791 | ||
2792 | ||
2793 | void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth) | |
2794 | { | |
2795 | if (wpa_auth) | |
2796 | wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++; | |
2797 | } | |
2798 | ||
2799 | ||
2800 | int wpa_auth_pairwise_set(struct wpa_state_machine *sm) | |
2801 | { | |
2802 | return sm && sm->pairwise_set; | |
2803 | } | |
2804 | ||
2805 | ||
ff36ff00 JM |
2806 | int wpa_auth_get_pairwise(struct wpa_state_machine *sm) |
2807 | { | |
2808 | return sm->pairwise; | |
2809 | } | |
2810 | ||
2811 | ||
6fc6879b JM |
2812 | int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm) |
2813 | { | |
2814 | if (sm == NULL) | |
2815 | return -1; | |
2816 | return sm->wpa_key_mgmt; | |
2817 | } | |
2818 | ||
2819 | ||
2820 | int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm) | |
2821 | { | |
2822 | if (sm == NULL) | |
2823 | return 0; | |
2824 | return sm->wpa; | |
2825 | } | |
2826 | ||
2827 | ||
2828 | int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm, | |
2829 | struct rsn_pmksa_cache_entry *entry) | |
2830 | { | |
2831 | if (sm == NULL || sm->pmksa != entry) | |
2832 | return -1; | |
2833 | sm->pmksa = NULL; | |
2834 | return 0; | |
2835 | } | |
2836 | ||
2837 | ||
2838 | struct rsn_pmksa_cache_entry * | |
2839 | wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm) | |
2840 | { | |
2841 | return sm ? sm->pmksa : NULL; | |
2842 | } | |
2843 | ||
2844 | ||
2845 | void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm) | |
2846 | { | |
2847 | if (sm) | |
2848 | sm->dot11RSNAStatsTKIPLocalMICFailures++; | |
2849 | } | |
2850 | ||
2851 | ||
2852 | const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len) | |
2853 | { | |
2854 | if (wpa_auth == NULL) | |
2855 | return NULL; | |
2856 | *len = wpa_auth->wpa_ie_len; | |
2857 | return wpa_auth->wpa_ie; | |
2858 | } | |
2859 | ||
2860 | ||
2861 | int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk, | |
2862 | int session_timeout, struct eapol_state_machine *eapol) | |
2863 | { | |
cb465555 JM |
2864 | if (sm == NULL || sm->wpa != WPA_VERSION_WPA2 || |
2865 | sm->wpa_auth->conf.disable_pmksa_caching) | |
6fc6879b JM |
2866 | return -1; |
2867 | ||
4bb081f1 JM |
2868 | if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, PMK_LEN, |
2869 | sm->wpa_auth->addr, sm->addr, session_timeout, | |
2870 | eapol, sm->wpa_key_mgmt)) | |
6fc6879b JM |
2871 | return 0; |
2872 | ||
2873 | return -1; | |
2874 | } | |
2875 | ||
2876 | ||
2877 | int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth, | |
2878 | const u8 *pmk, size_t len, const u8 *sta_addr, | |
2879 | int session_timeout, | |
2880 | struct eapol_state_machine *eapol) | |
2881 | { | |
2882 | if (wpa_auth == NULL) | |
2883 | return -1; | |
2884 | ||
4bb081f1 JM |
2885 | if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len, wpa_auth->addr, |
2886 | sta_addr, session_timeout, eapol, | |
2887 | WPA_KEY_MGMT_IEEE8021X)) | |
6fc6879b JM |
2888 | return 0; |
2889 | ||
2890 | return -1; | |
2891 | } | |
2892 | ||
2893 | ||
2894 | static struct wpa_group * | |
2895 | wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id) | |
2896 | { | |
2897 | struct wpa_group *group; | |
2898 | ||
2899 | if (wpa_auth == NULL || wpa_auth->group == NULL) | |
2900 | return NULL; | |
2901 | ||
2902 | wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d", | |
2903 | vlan_id); | |
bdffdc5d | 2904 | group = wpa_group_init(wpa_auth, vlan_id, 0); |
6fc6879b JM |
2905 | if (group == NULL) |
2906 | return NULL; | |
2907 | ||
2908 | group->next = wpa_auth->group->next; | |
2909 | wpa_auth->group->next = group; | |
2910 | ||
2911 | return group; | |
2912 | } | |
2913 | ||
2914 | ||
2915 | int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id) | |
2916 | { | |
2917 | struct wpa_group *group; | |
2918 | ||
2919 | if (sm == NULL || sm->wpa_auth == NULL) | |
2920 | return 0; | |
2921 | ||
2922 | group = sm->wpa_auth->group; | |
2923 | while (group) { | |
2924 | if (group->vlan_id == vlan_id) | |
2925 | break; | |
2926 | group = group->next; | |
2927 | } | |
2928 | ||
2929 | if (group == NULL) { | |
2930 | group = wpa_auth_add_group(sm->wpa_auth, vlan_id); | |
2931 | if (group == NULL) | |
2932 | return -1; | |
2933 | } | |
2934 | ||
2935 | if (sm->group == group) | |
2936 | return 0; | |
2937 | ||
2938 | wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state " | |
2939 | "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id); | |
2940 | ||
2941 | sm->group = group; | |
2942 | return 0; | |
2943 | } | |
e4bf4db9 JM |
2944 | |
2945 | ||
2946 | void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth, | |
2947 | struct wpa_state_machine *sm, int ack) | |
2948 | { | |
2949 | if (wpa_auth == NULL || sm == NULL) | |
2950 | return; | |
2951 | wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key TX status for STA " MACSTR | |
2952 | " ack=%d", MAC2STR(sm->addr), ack); | |
2953 | if (sm->pending_1_of_4_timeout && ack) { | |
2954 | /* | |
2955 | * Some deployed supplicant implementations update their SNonce | |
2956 | * for each EAPOL-Key 2/4 message even within the same 4-way | |
2957 | * handshake and then fail to use the first SNonce when | |
2958 | * deriving the PTK. This results in unsuccessful 4-way | |
2959 | * handshake whenever the relatively short initial timeout is | |
2960 | * reached and EAPOL-Key 1/4 is retransmitted. Try to work | |
2961 | * around this by increasing the timeout now that we know that | |
2962 | * the station has received the frame. | |
2963 | */ | |
2964 | int timeout_ms = eapol_key_timeout_subseq; | |
2965 | wpa_printf(MSG_DEBUG, "WPA: Increase initial EAPOL-Key 1/4 " | |
2966 | "timeout by %u ms because of acknowledged frame", | |
2967 | timeout_ms); | |
2968 | eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm); | |
2969 | eloop_register_timeout(timeout_ms / 1000, | |
2970 | (timeout_ms % 1000) * 1000, | |
2971 | wpa_send_eapol_timeout, wpa_auth, sm); | |
2972 | } | |
2973 | } |