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Commit | Line | Data |
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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 | ||
c772d054 | 57 | static inline int wpa_auth_mic_failure_report( |
6fc6879b JM |
58 | struct wpa_authenticator *wpa_auth, const u8 *addr) |
59 | { | |
60 | if (wpa_auth->cb.mic_failure_report) | |
c772d054 JM |
61 | return wpa_auth->cb.mic_failure_report(wpa_auth->cb.ctx, addr); |
62 | return 0; | |
6fc6879b JM |
63 | } |
64 | ||
65 | ||
66 | static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth, | |
67 | const u8 *addr, wpa_eapol_variable var, | |
68 | int value) | |
69 | { | |
70 | if (wpa_auth->cb.set_eapol) | |
71 | wpa_auth->cb.set_eapol(wpa_auth->cb.ctx, addr, var, value); | |
72 | } | |
73 | ||
74 | ||
75 | static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth, | |
76 | const u8 *addr, wpa_eapol_variable var) | |
77 | { | |
78 | if (wpa_auth->cb.get_eapol == NULL) | |
79 | return -1; | |
80 | return wpa_auth->cb.get_eapol(wpa_auth->cb.ctx, addr, var); | |
81 | } | |
82 | ||
83 | ||
84 | static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth, | |
85 | const u8 *addr, const u8 *prev_psk) | |
86 | { | |
87 | if (wpa_auth->cb.get_psk == NULL) | |
88 | return NULL; | |
89 | return wpa_auth->cb.get_psk(wpa_auth->cb.ctx, addr, prev_psk); | |
90 | } | |
91 | ||
92 | ||
93 | static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth, | |
94 | const u8 *addr, u8 *msk, size_t *len) | |
95 | { | |
96 | if (wpa_auth->cb.get_msk == NULL) | |
97 | return -1; | |
98 | return wpa_auth->cb.get_msk(wpa_auth->cb.ctx, addr, msk, len); | |
99 | } | |
100 | ||
101 | ||
102 | static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth, | |
103 | int vlan_id, | |
71934751 | 104 | enum wpa_alg alg, const u8 *addr, int idx, |
6fc6879b JM |
105 | u8 *key, size_t key_len) |
106 | { | |
107 | if (wpa_auth->cb.set_key == NULL) | |
108 | return -1; | |
109 | return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx, | |
110 | key, key_len); | |
111 | } | |
112 | ||
113 | ||
114 | static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth, | |
115 | const u8 *addr, int idx, u8 *seq) | |
116 | { | |
117 | if (wpa_auth->cb.get_seqnum == NULL) | |
118 | return -1; | |
119 | return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq); | |
120 | } | |
121 | ||
122 | ||
6fc6879b JM |
123 | static inline int |
124 | wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr, | |
125 | const u8 *data, size_t data_len, int encrypt) | |
126 | { | |
127 | if (wpa_auth->cb.send_eapol == NULL) | |
128 | return -1; | |
129 | return wpa_auth->cb.send_eapol(wpa_auth->cb.ctx, addr, data, data_len, | |
130 | encrypt); | |
131 | } | |
132 | ||
133 | ||
134 | int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth, | |
135 | int (*cb)(struct wpa_state_machine *sm, void *ctx), | |
136 | void *cb_ctx) | |
137 | { | |
138 | if (wpa_auth->cb.for_each_sta == NULL) | |
139 | return 0; | |
140 | return wpa_auth->cb.for_each_sta(wpa_auth->cb.ctx, cb, cb_ctx); | |
141 | } | |
142 | ||
143 | ||
bf98f7f3 JM |
144 | int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth, |
145 | int (*cb)(struct wpa_authenticator *a, void *ctx), | |
146 | void *cb_ctx) | |
147 | { | |
148 | if (wpa_auth->cb.for_each_auth == NULL) | |
149 | return 0; | |
150 | return wpa_auth->cb.for_each_auth(wpa_auth->cb.ctx, cb, cb_ctx); | |
151 | } | |
152 | ||
153 | ||
6fc6879b JM |
154 | void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr, |
155 | logger_level level, const char *txt) | |
156 | { | |
157 | if (wpa_auth->cb.logger == NULL) | |
158 | return; | |
159 | wpa_auth->cb.logger(wpa_auth->cb.ctx, addr, level, txt); | |
160 | } | |
161 | ||
162 | ||
163 | void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr, | |
164 | logger_level level, const char *fmt, ...) | |
165 | { | |
166 | char *format; | |
167 | int maxlen; | |
168 | va_list ap; | |
169 | ||
170 | if (wpa_auth->cb.logger == NULL) | |
171 | return; | |
172 | ||
173 | maxlen = os_strlen(fmt) + 100; | |
174 | format = os_malloc(maxlen); | |
175 | if (!format) | |
176 | return; | |
177 | ||
178 | va_start(ap, fmt); | |
179 | vsnprintf(format, maxlen, fmt, ap); | |
180 | va_end(ap); | |
181 | ||
182 | wpa_auth_logger(wpa_auth, addr, level, format); | |
183 | ||
184 | os_free(format); | |
185 | } | |
186 | ||
187 | ||
188 | static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth, | |
189 | const u8 *addr) | |
190 | { | |
191 | if (wpa_auth->cb.disconnect == NULL) | |
192 | return; | |
afcc9ea1 | 193 | wpa_printf(MSG_DEBUG, "wpa_sta_disconnect STA " MACSTR, MAC2STR(addr)); |
6fc6879b JM |
194 | wpa_auth->cb.disconnect(wpa_auth->cb.ctx, addr, |
195 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
196 | } | |
197 | ||
198 | ||
199 | static int wpa_use_aes_cmac(struct wpa_state_machine *sm) | |
200 | { | |
56586197 | 201 | int ret = 0; |
6fc6879b | 202 | #ifdef CONFIG_IEEE80211R |
56586197 JM |
203 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) |
204 | ret = 1; | |
6fc6879b | 205 | #endif /* CONFIG_IEEE80211R */ |
56586197 JM |
206 | #ifdef CONFIG_IEEE80211W |
207 | if (wpa_key_mgmt_sha256(sm->wpa_key_mgmt)) | |
208 | ret = 1; | |
209 | #endif /* CONFIG_IEEE80211W */ | |
210 | return ret; | |
6fc6879b JM |
211 | } |
212 | ||
213 | ||
214 | static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx) | |
215 | { | |
216 | struct wpa_authenticator *wpa_auth = eloop_ctx; | |
217 | ||
3642c431 | 218 | if (random_get_bytes(wpa_auth->group->GMK, WPA_GMK_LEN)) { |
6fc6879b JM |
219 | wpa_printf(MSG_ERROR, "Failed to get random data for WPA " |
220 | "initialization."); | |
221 | } else { | |
222 | wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd"); | |
5cb9d5c3 JM |
223 | wpa_hexdump_key(MSG_DEBUG, "GMK", |
224 | wpa_auth->group->GMK, WPA_GMK_LEN); | |
6fc6879b JM |
225 | } |
226 | ||
227 | if (wpa_auth->conf.wpa_gmk_rekey) { | |
228 | eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0, | |
229 | wpa_rekey_gmk, wpa_auth, NULL); | |
230 | } | |
231 | } | |
232 | ||
233 | ||
234 | static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx) | |
235 | { | |
236 | struct wpa_authenticator *wpa_auth = eloop_ctx; | |
237 | struct wpa_group *group; | |
238 | ||
239 | wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK"); | |
240 | for (group = wpa_auth->group; group; group = group->next) { | |
241 | group->GTKReKey = TRUE; | |
242 | do { | |
243 | group->changed = FALSE; | |
244 | wpa_group_sm_step(wpa_auth, group); | |
245 | } while (group->changed); | |
246 | } | |
247 | ||
248 | if (wpa_auth->conf.wpa_group_rekey) { | |
249 | eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, | |
250 | 0, wpa_rekey_gtk, wpa_auth, NULL); | |
251 | } | |
252 | } | |
253 | ||
254 | ||
581a8cde JM |
255 | static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx) |
256 | { | |
257 | struct wpa_authenticator *wpa_auth = eloop_ctx; | |
258 | struct wpa_state_machine *sm = timeout_ctx; | |
259 | ||
260 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK"); | |
261 | wpa_request_new_ptk(sm); | |
262 | wpa_sm_step(sm); | |
263 | } | |
264 | ||
265 | ||
6fc6879b JM |
266 | static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx) |
267 | { | |
268 | if (sm->pmksa == ctx) | |
269 | sm->pmksa = NULL; | |
270 | return 0; | |
271 | } | |
272 | ||
273 | ||
274 | static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry, | |
275 | void *ctx) | |
276 | { | |
277 | struct wpa_authenticator *wpa_auth = ctx; | |
278 | wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry); | |
279 | } | |
280 | ||
281 | ||
1bdb7ab3 JM |
282 | static int wpa_group_init_gmk_and_counter(struct wpa_authenticator *wpa_auth, |
283 | struct wpa_group *group) | |
284 | { | |
285 | u8 buf[ETH_ALEN + 8 + sizeof(group)]; | |
286 | u8 rkey[32]; | |
287 | ||
3642c431 | 288 | if (random_get_bytes(group->GMK, WPA_GMK_LEN) < 0) |
1bdb7ab3 JM |
289 | return -1; |
290 | wpa_hexdump_key(MSG_DEBUG, "GMK", group->GMK, WPA_GMK_LEN); | |
291 | ||
292 | /* | |
293 | * Counter = PRF-256(Random number, "Init Counter", | |
294 | * Local MAC Address || Time) | |
295 | */ | |
296 | os_memcpy(buf, wpa_auth->addr, ETH_ALEN); | |
297 | wpa_get_ntp_timestamp(buf + ETH_ALEN); | |
298 | os_memcpy(buf + ETH_ALEN + 8, &group, sizeof(group)); | |
3642c431 | 299 | if (random_get_bytes(rkey, sizeof(rkey)) < 0) |
1bdb7ab3 JM |
300 | return -1; |
301 | ||
302 | if (sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf), | |
303 | group->Counter, WPA_NONCE_LEN) < 0) | |
304 | return -1; | |
305 | wpa_hexdump_key(MSG_DEBUG, "Key Counter", | |
306 | group->Counter, WPA_NONCE_LEN); | |
307 | ||
308 | return 0; | |
309 | } | |
310 | ||
311 | ||
e6965d4e | 312 | static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth, |
bdffdc5d | 313 | int vlan_id, int delay_init) |
e6965d4e JM |
314 | { |
315 | struct wpa_group *group; | |
e6965d4e JM |
316 | |
317 | group = os_zalloc(sizeof(struct wpa_group)); | |
318 | if (group == NULL) | |
319 | return NULL; | |
320 | ||
321 | group->GTKAuthenticator = TRUE; | |
322 | group->vlan_id = vlan_id; | |
c3550295 | 323 | group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group); |
6fc6879b | 324 | |
08704cd8 JM |
325 | if (random_pool_ready() != 1) { |
326 | wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool " | |
327 | "for secure operations - update keys later when " | |
328 | "the first station connects"); | |
329 | } | |
330 | ||
1bdb7ab3 JM |
331 | /* |
332 | * Set initial GMK/Counter value here. The actual values that will be | |
333 | * used in negotiations will be set once the first station tries to | |
334 | * connect. This allows more time for collecting additional randomness | |
335 | * on embedded devices. | |
6fc6879b | 336 | */ |
1bdb7ab3 | 337 | if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0) { |
6fc6879b JM |
338 | wpa_printf(MSG_ERROR, "Failed to get random data for WPA " |
339 | "initialization."); | |
340 | os_free(group); | |
341 | return NULL; | |
342 | } | |
6fc6879b JM |
343 | |
344 | group->GInit = TRUE; | |
bdffdc5d JM |
345 | if (delay_init) { |
346 | wpa_printf(MSG_DEBUG, "WPA: Delay group state machine start " | |
347 | "until Beacon frames have been configured"); | |
348 | /* Initialization is completed in wpa_init_keys(). */ | |
349 | } else { | |
350 | wpa_group_sm_step(wpa_auth, group); | |
351 | group->GInit = FALSE; | |
352 | wpa_group_sm_step(wpa_auth, group); | |
353 | } | |
6fc6879b JM |
354 | |
355 | return group; | |
356 | } | |
357 | ||
358 | ||
359 | /** | |
360 | * wpa_init - Initialize WPA authenticator | |
361 | * @addr: Authenticator address | |
362 | * @conf: Configuration for WPA authenticator | |
a17df5fb | 363 | * @cb: Callback functions for WPA authenticator |
6fc6879b JM |
364 | * Returns: Pointer to WPA authenticator data or %NULL on failure |
365 | */ | |
366 | struct wpa_authenticator * wpa_init(const u8 *addr, | |
367 | struct wpa_auth_config *conf, | |
368 | struct wpa_auth_callbacks *cb) | |
369 | { | |
370 | struct wpa_authenticator *wpa_auth; | |
371 | ||
372 | wpa_auth = os_zalloc(sizeof(struct wpa_authenticator)); | |
373 | if (wpa_auth == NULL) | |
374 | return NULL; | |
375 | os_memcpy(wpa_auth->addr, addr, ETH_ALEN); | |
376 | os_memcpy(&wpa_auth->conf, conf, sizeof(*conf)); | |
377 | os_memcpy(&wpa_auth->cb, cb, sizeof(*cb)); | |
378 | ||
379 | if (wpa_auth_gen_wpa_ie(wpa_auth)) { | |
380 | wpa_printf(MSG_ERROR, "Could not generate WPA IE."); | |
381 | os_free(wpa_auth); | |
382 | return NULL; | |
383 | } | |
384 | ||
bdffdc5d | 385 | wpa_auth->group = wpa_group_init(wpa_auth, 0, 1); |
6fc6879b JM |
386 | if (wpa_auth->group == NULL) { |
387 | os_free(wpa_auth->wpa_ie); | |
388 | os_free(wpa_auth); | |
389 | return NULL; | |
390 | } | |
391 | ||
4bb081f1 JM |
392 | wpa_auth->pmksa = pmksa_cache_auth_init(wpa_auth_pmksa_free_cb, |
393 | wpa_auth); | |
6fc6879b JM |
394 | if (wpa_auth->pmksa == NULL) { |
395 | wpa_printf(MSG_ERROR, "PMKSA cache initialization failed."); | |
396 | os_free(wpa_auth->wpa_ie); | |
397 | os_free(wpa_auth); | |
398 | return NULL; | |
399 | } | |
400 | ||
401 | #ifdef CONFIG_IEEE80211R | |
402 | wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init(); | |
403 | if (wpa_auth->ft_pmk_cache == NULL) { | |
404 | wpa_printf(MSG_ERROR, "FT PMK cache initialization failed."); | |
405 | os_free(wpa_auth->wpa_ie); | |
4bb081f1 | 406 | pmksa_cache_auth_deinit(wpa_auth->pmksa); |
6fc6879b JM |
407 | os_free(wpa_auth); |
408 | return NULL; | |
409 | } | |
410 | #endif /* CONFIG_IEEE80211R */ | |
411 | ||
412 | if (wpa_auth->conf.wpa_gmk_rekey) { | |
413 | eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0, | |
414 | wpa_rekey_gmk, wpa_auth, NULL); | |
415 | } | |
416 | ||
417 | if (wpa_auth->conf.wpa_group_rekey) { | |
418 | eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0, | |
419 | wpa_rekey_gtk, wpa_auth, NULL); | |
420 | } | |
421 | ||
422 | return wpa_auth; | |
423 | } | |
424 | ||
425 | ||
bdffdc5d JM |
426 | int wpa_init_keys(struct wpa_authenticator *wpa_auth) |
427 | { | |
428 | struct wpa_group *group = wpa_auth->group; | |
429 | ||
430 | wpa_printf(MSG_DEBUG, "WPA: Start group state machine to set initial " | |
431 | "keys"); | |
432 | wpa_group_sm_step(wpa_auth, group); | |
433 | group->GInit = FALSE; | |
434 | wpa_group_sm_step(wpa_auth, group); | |
435 | return 0; | |
436 | } | |
437 | ||
438 | ||
6fc6879b JM |
439 | /** |
440 | * wpa_deinit - Deinitialize WPA authenticator | |
441 | * @wpa_auth: Pointer to WPA authenticator data from wpa_init() | |
442 | */ | |
443 | void wpa_deinit(struct wpa_authenticator *wpa_auth) | |
444 | { | |
445 | struct wpa_group *group, *prev; | |
446 | ||
447 | eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL); | |
448 | eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL); | |
449 | ||
450 | #ifdef CONFIG_PEERKEY | |
451 | while (wpa_auth->stsl_negotiations) | |
452 | wpa_stsl_remove(wpa_auth, wpa_auth->stsl_negotiations); | |
453 | #endif /* CONFIG_PEERKEY */ | |
454 | ||
4bb081f1 | 455 | pmksa_cache_auth_deinit(wpa_auth->pmksa); |
6fc6879b JM |
456 | |
457 | #ifdef CONFIG_IEEE80211R | |
458 | wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache); | |
459 | wpa_auth->ft_pmk_cache = NULL; | |
460 | #endif /* CONFIG_IEEE80211R */ | |
461 | ||
462 | os_free(wpa_auth->wpa_ie); | |
463 | ||
464 | group = wpa_auth->group; | |
465 | while (group) { | |
466 | prev = group; | |
467 | group = group->next; | |
468 | os_free(prev); | |
469 | } | |
470 | ||
471 | os_free(wpa_auth); | |
472 | } | |
473 | ||
474 | ||
475 | /** | |
476 | * wpa_reconfig - Update WPA authenticator configuration | |
477 | * @wpa_auth: Pointer to WPA authenticator data from wpa_init() | |
478 | * @conf: Configuration for WPA authenticator | |
479 | */ | |
480 | int wpa_reconfig(struct wpa_authenticator *wpa_auth, | |
481 | struct wpa_auth_config *conf) | |
482 | { | |
e6965d4e | 483 | struct wpa_group *group; |
6fc6879b JM |
484 | if (wpa_auth == NULL) |
485 | return 0; | |
486 | ||
487 | os_memcpy(&wpa_auth->conf, conf, sizeof(*conf)); | |
ad08c363 JM |
488 | if (wpa_auth_gen_wpa_ie(wpa_auth)) { |
489 | wpa_printf(MSG_ERROR, "Could not generate WPA IE."); | |
490 | return -1; | |
491 | } | |
492 | ||
e6965d4e JM |
493 | /* |
494 | * Reinitialize GTK to make sure it is suitable for the new | |
495 | * configuration. | |
496 | */ | |
497 | group = wpa_auth->group; | |
c3550295 | 498 | group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group); |
e6965d4e JM |
499 | group->GInit = TRUE; |
500 | wpa_group_sm_step(wpa_auth, group); | |
501 | group->GInit = FALSE; | |
502 | wpa_group_sm_step(wpa_auth, group); | |
503 | ||
6fc6879b JM |
504 | return 0; |
505 | } | |
506 | ||
507 | ||
508 | struct wpa_state_machine * | |
509 | wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr) | |
510 | { | |
511 | struct wpa_state_machine *sm; | |
512 | ||
513 | sm = os_zalloc(sizeof(struct wpa_state_machine)); | |
514 | if (sm == NULL) | |
515 | return NULL; | |
516 | os_memcpy(sm->addr, addr, ETH_ALEN); | |
517 | ||
518 | sm->wpa_auth = wpa_auth; | |
519 | sm->group = wpa_auth->group; | |
520 | ||
521 | return sm; | |
522 | } | |
523 | ||
524 | ||
6f9b5d16 JM |
525 | int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth, |
526 | struct wpa_state_machine *sm) | |
6fc6879b JM |
527 | { |
528 | if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL) | |
6f9b5d16 | 529 | return -1; |
6fc6879b JM |
530 | |
531 | #ifdef CONFIG_IEEE80211R | |
532 | if (sm->ft_completed) { | |
533 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
534 | "FT authentication already completed - do not " | |
535 | "start 4-way handshake"); | |
6f9b5d16 | 536 | return 0; |
6fc6879b JM |
537 | } |
538 | #endif /* CONFIG_IEEE80211R */ | |
539 | ||
540 | if (sm->started) { | |
22a299ee | 541 | os_memset(&sm->key_replay, 0, sizeof(sm->key_replay)); |
6fc6879b | 542 | sm->ReAuthenticationRequest = TRUE; |
6f9b5d16 | 543 | return wpa_sm_step(sm); |
6fc6879b JM |
544 | } |
545 | ||
546 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
547 | "start authentication"); | |
548 | sm->started = 1; | |
549 | ||
550 | sm->Init = TRUE; | |
e4a6ea1d | 551 | if (wpa_sm_step(sm) == 1) |
6f9b5d16 | 552 | return 1; /* should not really happen */ |
6fc6879b JM |
553 | sm->Init = FALSE; |
554 | sm->AuthenticationRequest = TRUE; | |
6f9b5d16 | 555 | return wpa_sm_step(sm); |
6fc6879b JM |
556 | } |
557 | ||
558 | ||
a8d05fca JM |
559 | void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm) |
560 | { | |
561 | /* WPA/RSN was not used - clear WPA state. This is needed if the STA | |
562 | * reassociates back to the same AP while the previous entry for the | |
563 | * STA has not yet been removed. */ | |
564 | if (sm == NULL) | |
565 | return; | |
566 | ||
567 | sm->wpa_key_mgmt = 0; | |
568 | } | |
569 | ||
570 | ||
6fc6879b JM |
571 | static void wpa_free_sta_sm(struct wpa_state_machine *sm) |
572 | { | |
2ade8ef2 JM |
573 | if (sm->GUpdateStationKeys) { |
574 | sm->group->GKeyDoneStations--; | |
575 | sm->GUpdateStationKeys = FALSE; | |
576 | } | |
0f857f43 JM |
577 | #ifdef CONFIG_IEEE80211R |
578 | os_free(sm->assoc_resp_ftie); | |
579 | #endif /* CONFIG_IEEE80211R */ | |
6fc6879b JM |
580 | os_free(sm->last_rx_eapol_key); |
581 | os_free(sm->wpa_ie); | |
582 | os_free(sm); | |
583 | } | |
584 | ||
585 | ||
586 | void wpa_auth_sta_deinit(struct wpa_state_machine *sm) | |
587 | { | |
588 | if (sm == NULL) | |
589 | return; | |
590 | ||
591 | if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) { | |
592 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
593 | "strict rekeying - force GTK rekey since STA " | |
594 | "is leaving"); | |
595 | eloop_cancel_timeout(wpa_rekey_gtk, sm->wpa_auth, NULL); | |
596 | eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth, | |
597 | NULL); | |
598 | } | |
599 | ||
600 | eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm); | |
e4bf4db9 | 601 | sm->pending_1_of_4_timeout = 0; |
6fc6879b | 602 | eloop_cancel_timeout(wpa_sm_call_step, sm, NULL); |
581a8cde | 603 | eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm); |
6fc6879b JM |
604 | if (sm->in_step_loop) { |
605 | /* Must not free state machine while wpa_sm_step() is running. | |
606 | * Freeing will be completed in the end of wpa_sm_step(). */ | |
607 | wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state " | |
608 | "machine deinit for " MACSTR, MAC2STR(sm->addr)); | |
609 | sm->pending_deinit = 1; | |
610 | } else | |
611 | wpa_free_sta_sm(sm); | |
612 | } | |
613 | ||
614 | ||
615 | static void wpa_request_new_ptk(struct wpa_state_machine *sm) | |
616 | { | |
617 | if (sm == NULL) | |
618 | return; | |
619 | ||
620 | sm->PTKRequest = TRUE; | |
621 | sm->PTK_valid = 0; | |
622 | } | |
623 | ||
624 | ||
68921e24 | 625 | static int wpa_replay_counter_valid(struct wpa_key_replay_counter *ctr, |
22a299ee JM |
626 | const u8 *replay_counter) |
627 | { | |
628 | int i; | |
629 | for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) { | |
68921e24 | 630 | if (!ctr[i].valid) |
22a299ee | 631 | break; |
68921e24 | 632 | if (os_memcmp(replay_counter, ctr[i].counter, |
22a299ee JM |
633 | WPA_REPLAY_COUNTER_LEN) == 0) |
634 | return 1; | |
635 | } | |
636 | return 0; | |
637 | } | |
638 | ||
639 | ||
68921e24 JM |
640 | static void wpa_replay_counter_mark_invalid(struct wpa_key_replay_counter *ctr, |
641 | const u8 *replay_counter) | |
642 | { | |
643 | int i; | |
644 | for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) { | |
645 | if (ctr[i].valid && | |
646 | (replay_counter == NULL || | |
647 | os_memcmp(replay_counter, ctr[i].counter, | |
648 | WPA_REPLAY_COUNTER_LEN) == 0)) | |
649 | ctr[i].valid = FALSE; | |
650 | } | |
651 | } | |
652 | ||
653 | ||
0f857f43 JM |
654 | #ifdef CONFIG_IEEE80211R |
655 | static int ft_check_msg_2_of_4(struct wpa_authenticator *wpa_auth, | |
656 | struct wpa_state_machine *sm, | |
657 | struct wpa_eapol_ie_parse *kde) | |
658 | { | |
659 | struct wpa_ie_data ie; | |
660 | struct rsn_mdie *mdie; | |
661 | ||
662 | if (wpa_parse_wpa_ie_rsn(kde->rsn_ie, kde->rsn_ie_len, &ie) < 0 || | |
663 | ie.num_pmkid != 1 || ie.pmkid == NULL) { | |
664 | wpa_printf(MSG_DEBUG, "FT: No PMKR1Name in " | |
665 | "FT 4-way handshake message 2/4"); | |
666 | return -1; | |
667 | } | |
668 | ||
669 | os_memcpy(sm->sup_pmk_r1_name, ie.pmkid, PMKID_LEN); | |
670 | wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Supplicant", | |
671 | sm->sup_pmk_r1_name, PMKID_LEN); | |
672 | ||
673 | if (!kde->mdie || !kde->ftie) { | |
674 | wpa_printf(MSG_DEBUG, "FT: No %s in FT 4-way handshake " | |
675 | "message 2/4", kde->mdie ? "FTIE" : "MDIE"); | |
676 | return -1; | |
677 | } | |
678 | ||
679 | mdie = (struct rsn_mdie *) (kde->mdie + 2); | |
680 | if (kde->mdie[1] < sizeof(struct rsn_mdie) || | |
681 | os_memcmp(wpa_auth->conf.mobility_domain, mdie->mobility_domain, | |
682 | MOBILITY_DOMAIN_ID_LEN) != 0) { | |
683 | wpa_printf(MSG_DEBUG, "FT: MDIE mismatch"); | |
684 | return -1; | |
685 | } | |
686 | ||
687 | if (sm->assoc_resp_ftie && | |
688 | (kde->ftie[1] != sm->assoc_resp_ftie[1] || | |
689 | os_memcmp(kde->ftie, sm->assoc_resp_ftie, | |
690 | 2 + sm->assoc_resp_ftie[1]) != 0)) { | |
691 | wpa_printf(MSG_DEBUG, "FT: FTIE mismatch"); | |
692 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 2/4", | |
693 | kde->ftie, kde->ftie_len); | |
694 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)AssocResp", | |
695 | sm->assoc_resp_ftie, 2 + sm->assoc_resp_ftie[1]); | |
696 | return -1; | |
697 | } | |
698 | ||
699 | return 0; | |
700 | } | |
701 | #endif /* CONFIG_IEEE80211R */ | |
702 | ||
703 | ||
c772d054 JM |
704 | static int wpa_receive_error_report(struct wpa_authenticator *wpa_auth, |
705 | struct wpa_state_machine *sm, int group) | |
ec027805 JM |
706 | { |
707 | /* Supplicant reported a Michael MIC error */ | |
708 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
709 | "received EAPOL-Key Error Request " | |
710 | "(STA detected Michael MIC failure (group=%d))", | |
711 | group); | |
fbc72d32 JM |
712 | |
713 | if (group && wpa_auth->conf.wpa_group != WPA_CIPHER_TKIP) { | |
714 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
715 | "ignore Michael MIC failure report since " | |
716 | "group cipher is not TKIP"); | |
717 | } else if (!group && sm->pairwise != WPA_CIPHER_TKIP) { | |
718 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
719 | "ignore Michael MIC failure report since " | |
720 | "pairwise cipher is not TKIP"); | |
721 | } else { | |
c772d054 JM |
722 | if (wpa_auth_mic_failure_report(wpa_auth, sm->addr) > 0) |
723 | return 1; /* STA entry was removed */ | |
fbc72d32 JM |
724 | sm->dot11RSNAStatsTKIPRemoteMICFailures++; |
725 | wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++; | |
726 | } | |
ec027805 JM |
727 | |
728 | /* | |
729 | * Error report is not a request for a new key handshake, but since | |
730 | * Authenticator may do it, let's change the keys now anyway. | |
731 | */ | |
732 | wpa_request_new_ptk(sm); | |
c772d054 | 733 | return 0; |
ec027805 JM |
734 | } |
735 | ||
736 | ||
6fc6879b JM |
737 | void wpa_receive(struct wpa_authenticator *wpa_auth, |
738 | struct wpa_state_machine *sm, | |
739 | u8 *data, size_t data_len) | |
740 | { | |
741 | struct ieee802_1x_hdr *hdr; | |
742 | struct wpa_eapol_key *key; | |
743 | u16 key_info, key_data_length; | |
744 | enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST, | |
745 | SMK_M1, SMK_M3, SMK_ERROR } msg; | |
746 | char *msgtxt; | |
747 | struct wpa_eapol_ie_parse kde; | |
26e23750 | 748 | int ft; |
1566ec46 JM |
749 | const u8 *eapol_key_ie; |
750 | size_t eapol_key_ie_len; | |
6fc6879b JM |
751 | |
752 | if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL) | |
753 | return; | |
754 | ||
755 | if (data_len < sizeof(*hdr) + sizeof(*key)) | |
756 | return; | |
757 | ||
758 | hdr = (struct ieee802_1x_hdr *) data; | |
759 | key = (struct wpa_eapol_key *) (hdr + 1); | |
760 | key_info = WPA_GET_BE16(key->key_info); | |
761 | key_data_length = WPA_GET_BE16(key->key_data_length); | |
0d442aff JM |
762 | wpa_printf(MSG_DEBUG, "WPA: Received EAPOL-Key from " MACSTR |
763 | " key_info=0x%x type=%u key_data_length=%u", | |
764 | MAC2STR(sm->addr), key_info, key->type, key_data_length); | |
6fc6879b JM |
765 | if (key_data_length > data_len - sizeof(*hdr) - sizeof(*key)) { |
766 | wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - " | |
767 | "key_data overflow (%d > %lu)", | |
768 | key_data_length, | |
769 | (unsigned long) (data_len - sizeof(*hdr) - | |
770 | sizeof(*key))); | |
771 | return; | |
772 | } | |
773 | ||
f8e96eb6 | 774 | if (sm->wpa == WPA_VERSION_WPA2) { |
74590e71 JM |
775 | if (key->type == EAPOL_KEY_TYPE_WPA) { |
776 | /* | |
777 | * Some deployed station implementations seem to send | |
778 | * msg 4/4 with incorrect type value in WPA2 mode. | |
779 | */ | |
780 | wpa_printf(MSG_DEBUG, "Workaround: Allow EAPOL-Key " | |
781 | "with unexpected WPA type in RSN mode"); | |
782 | } else if (key->type != EAPOL_KEY_TYPE_RSN) { | |
f8e96eb6 JM |
783 | wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with " |
784 | "unexpected type %d in RSN mode", | |
785 | key->type); | |
786 | return; | |
787 | } | |
788 | } else { | |
789 | if (key->type != EAPOL_KEY_TYPE_WPA) { | |
790 | wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with " | |
791 | "unexpected type %d in WPA mode", | |
792 | key->type); | |
793 | return; | |
794 | } | |
795 | } | |
796 | ||
bc8318ac JM |
797 | wpa_hexdump(MSG_DEBUG, "WPA: Received Key Nonce", key->key_nonce, |
798 | WPA_NONCE_LEN); | |
799 | wpa_hexdump(MSG_DEBUG, "WPA: Received Replay Counter", | |
800 | key->replay_counter, WPA_REPLAY_COUNTER_LEN); | |
801 | ||
6fc6879b JM |
802 | /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys |
803 | * are set */ | |
804 | ||
805 | if ((key_info & (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) == | |
806 | (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) { | |
807 | if (key_info & WPA_KEY_INFO_ERROR) { | |
808 | msg = SMK_ERROR; | |
809 | msgtxt = "SMK Error"; | |
810 | } else { | |
811 | msg = SMK_M1; | |
812 | msgtxt = "SMK M1"; | |
813 | } | |
814 | } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) { | |
815 | msg = SMK_M3; | |
816 | msgtxt = "SMK M3"; | |
817 | } else if (key_info & WPA_KEY_INFO_REQUEST) { | |
818 | msg = REQUEST; | |
819 | msgtxt = "Request"; | |
820 | } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) { | |
821 | msg = GROUP_2; | |
822 | msgtxt = "2/2 Group"; | |
823 | } else if (key_data_length == 0) { | |
824 | msg = PAIRWISE_4; | |
825 | msgtxt = "4/4 Pairwise"; | |
826 | } else { | |
827 | msg = PAIRWISE_2; | |
828 | msgtxt = "2/4 Pairwise"; | |
829 | } | |
830 | ||
831 | /* TODO: key_info type validation for PeerKey */ | |
832 | if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 || | |
833 | msg == GROUP_2) { | |
834 | u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK; | |
eb7719ff JM |
835 | if (sm->pairwise == WPA_CIPHER_CCMP || |
836 | sm->pairwise == WPA_CIPHER_GCMP) { | |
6fc6879b JM |
837 | if (wpa_use_aes_cmac(sm) && |
838 | ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) { | |
839 | wpa_auth_logger(wpa_auth, sm->addr, | |
840 | LOGGER_WARNING, | |
841 | "advertised support for " | |
842 | "AES-128-CMAC, but did not " | |
843 | "use it"); | |
844 | return; | |
845 | } | |
846 | ||
847 | if (!wpa_use_aes_cmac(sm) && | |
848 | ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { | |
849 | wpa_auth_logger(wpa_auth, sm->addr, | |
850 | LOGGER_WARNING, | |
851 | "did not use HMAC-SHA1-AES " | |
eb7719ff | 852 | "with CCMP/GCMP"); |
6fc6879b JM |
853 | return; |
854 | } | |
855 | } | |
856 | } | |
857 | ||
858 | if (key_info & WPA_KEY_INFO_REQUEST) { | |
859 | if (sm->req_replay_counter_used && | |
860 | os_memcmp(key->replay_counter, sm->req_replay_counter, | |
861 | WPA_REPLAY_COUNTER_LEN) <= 0) { | |
862 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING, | |
863 | "received EAPOL-Key request with " | |
864 | "replayed counter"); | |
865 | return; | |
866 | } | |
867 | } | |
868 | ||
869 | if (!(key_info & WPA_KEY_INFO_REQUEST) && | |
68921e24 | 870 | !wpa_replay_counter_valid(sm->key_replay, key->replay_counter)) { |
22a299ee | 871 | int i; |
68921e24 JM |
872 | |
873 | if (msg == PAIRWISE_2 && | |
874 | wpa_replay_counter_valid(sm->prev_key_replay, | |
875 | key->replay_counter) && | |
876 | sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING && | |
877 | os_memcmp(sm->SNonce, key->key_nonce, WPA_NONCE_LEN) != 0) | |
878 | { | |
879 | /* | |
880 | * Some supplicant implementations (e.g., Windows XP | |
881 | * WZC) update SNonce for each EAPOL-Key 2/4. This | |
882 | * breaks the workaround on accepting any of the | |
883 | * pending requests, so allow the SNonce to be updated | |
884 | * even if we have already sent out EAPOL-Key 3/4. | |
885 | */ | |
886 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
887 | "Process SNonce update from STA " | |
888 | "based on retransmitted EAPOL-Key " | |
889 | "1/4"); | |
890 | sm->update_snonce = 1; | |
891 | wpa_replay_counter_mark_invalid(sm->prev_key_replay, | |
892 | key->replay_counter); | |
893 | goto continue_processing; | |
894 | } | |
895 | ||
896 | if (msg == PAIRWISE_2 && | |
897 | wpa_replay_counter_valid(sm->prev_key_replay, | |
898 | key->replay_counter) && | |
899 | sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING) { | |
900 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
901 | "ignore retransmitted EAPOL-Key %s - " | |
902 | "SNonce did not change", msgtxt); | |
903 | } else { | |
904 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
905 | "received EAPOL-Key %s with " | |
906 | "unexpected replay counter", msgtxt); | |
907 | } | |
22a299ee JM |
908 | for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) { |
909 | if (!sm->key_replay[i].valid) | |
910 | break; | |
911 | wpa_hexdump(MSG_DEBUG, "pending replay counter", | |
912 | sm->key_replay[i].counter, | |
913 | WPA_REPLAY_COUNTER_LEN); | |
914 | } | |
6fc6879b JM |
915 | wpa_hexdump(MSG_DEBUG, "received replay counter", |
916 | key->replay_counter, WPA_REPLAY_COUNTER_LEN); | |
917 | return; | |
918 | } | |
919 | ||
68921e24 | 920 | continue_processing: |
6fc6879b JM |
921 | switch (msg) { |
922 | case PAIRWISE_2: | |
923 | if (sm->wpa_ptk_state != WPA_PTK_PTKSTART && | |
68921e24 JM |
924 | sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING && |
925 | (!sm->update_snonce || | |
926 | sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING)) { | |
6fc6879b JM |
927 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, |
928 | "received EAPOL-Key msg 2/4 in " | |
929 | "invalid state (%d) - dropped", | |
930 | sm->wpa_ptk_state); | |
931 | return; | |
932 | } | |
bbb921da | 933 | random_add_randomness(key->key_nonce, WPA_NONCE_LEN); |
08704cd8 JM |
934 | if (sm->group->reject_4way_hs_for_entropy) { |
935 | /* | |
936 | * The system did not have enough entropy to generate | |
937 | * strong random numbers. Reject the first 4-way | |
938 | * handshake(s) and collect some entropy based on the | |
939 | * information from it. Once enough entropy is | |
940 | * available, the next atempt will trigger GMK/Key | |
941 | * Counter update and the station will be allowed to | |
942 | * continue. | |
943 | */ | |
944 | wpa_printf(MSG_DEBUG, "WPA: Reject 4-way handshake to " | |
945 | "collect more entropy for random number " | |
946 | "generation"); | |
08704cd8 | 947 | random_mark_pool_ready(); |
08704cd8 JM |
948 | wpa_sta_disconnect(wpa_auth, sm->addr); |
949 | return; | |
950 | } | |
1566ec46 JM |
951 | if (wpa_parse_kde_ies((u8 *) (key + 1), key_data_length, |
952 | &kde) < 0) { | |
953 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
954 | "received EAPOL-Key msg 2/4 with " | |
955 | "invalid Key Data contents"); | |
956 | return; | |
957 | } | |
958 | if (kde.rsn_ie) { | |
959 | eapol_key_ie = kde.rsn_ie; | |
960 | eapol_key_ie_len = kde.rsn_ie_len; | |
961 | } else { | |
962 | eapol_key_ie = kde.wpa_ie; | |
963 | eapol_key_ie_len = kde.wpa_ie_len; | |
964 | } | |
26e23750 JM |
965 | ft = sm->wpa == WPA_VERSION_WPA2 && |
966 | wpa_key_mgmt_ft(sm->wpa_key_mgmt); | |
6fc6879b | 967 | if (sm->wpa_ie == NULL || |
26e23750 JM |
968 | wpa_compare_rsn_ie(ft, |
969 | sm->wpa_ie, sm->wpa_ie_len, | |
1566ec46 | 970 | eapol_key_ie, eapol_key_ie_len)) { |
6fc6879b JM |
971 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, |
972 | "WPA IE from (Re)AssocReq did not " | |
973 | "match with msg 2/4"); | |
974 | if (sm->wpa_ie) { | |
975 | wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq", | |
976 | sm->wpa_ie, sm->wpa_ie_len); | |
977 | } | |
978 | wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4", | |
1566ec46 | 979 | eapol_key_ie, eapol_key_ie_len); |
6fc6879b JM |
980 | /* MLME-DEAUTHENTICATE.request */ |
981 | wpa_sta_disconnect(wpa_auth, sm->addr); | |
982 | return; | |
983 | } | |
26e23750 | 984 | #ifdef CONFIG_IEEE80211R |
0f857f43 JM |
985 | if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) { |
986 | wpa_sta_disconnect(wpa_auth, sm->addr); | |
987 | return; | |
26e23750 JM |
988 | } |
989 | #endif /* CONFIG_IEEE80211R */ | |
6fc6879b JM |
990 | break; |
991 | case PAIRWISE_4: | |
992 | if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING || | |
993 | !sm->PTK_valid) { | |
994 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
995 | "received EAPOL-Key msg 4/4 in " | |
996 | "invalid state (%d) - dropped", | |
997 | sm->wpa_ptk_state); | |
998 | return; | |
999 | } | |
1000 | break; | |
1001 | case GROUP_2: | |
1002 | if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING | |
1003 | || !sm->PTK_valid) { | |
1004 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
1005 | "received EAPOL-Key msg 2/2 in " | |
1006 | "invalid state (%d) - dropped", | |
1007 | sm->wpa_ptk_group_state); | |
1008 | return; | |
1009 | } | |
1010 | break; | |
1011 | #ifdef CONFIG_PEERKEY | |
1012 | case SMK_M1: | |
1013 | case SMK_M3: | |
1014 | case SMK_ERROR: | |
1015 | if (!wpa_auth->conf.peerkey) { | |
1016 | wpa_printf(MSG_DEBUG, "RSN: SMK M1/M3/Error, but " | |
1017 | "PeerKey use disabled - ignoring message"); | |
1018 | return; | |
1019 | } | |
1020 | if (!sm->PTK_valid) { | |
1021 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1022 | "received EAPOL-Key msg SMK in " | |
1023 | "invalid state - dropped"); | |
1024 | return; | |
1025 | } | |
1026 | break; | |
1027 | #else /* CONFIG_PEERKEY */ | |
1028 | case SMK_M1: | |
1029 | case SMK_M3: | |
1030 | case SMK_ERROR: | |
1031 | return; /* STSL disabled - ignore SMK messages */ | |
1032 | #endif /* CONFIG_PEERKEY */ | |
1033 | case REQUEST: | |
1034 | break; | |
1035 | } | |
1036 | ||
1037 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1038 | "received EAPOL-Key frame (%s)", msgtxt); | |
1039 | ||
1040 | if (key_info & WPA_KEY_INFO_ACK) { | |
1041 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1042 | "received invalid EAPOL-Key: Key Ack set"); | |
1043 | return; | |
1044 | } | |
1045 | ||
1046 | if (!(key_info & WPA_KEY_INFO_MIC)) { | |
1047 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1048 | "received invalid EAPOL-Key: Key MIC not set"); | |
1049 | return; | |
1050 | } | |
1051 | ||
1052 | sm->MICVerified = FALSE; | |
68921e24 | 1053 | if (sm->PTK_valid && !sm->update_snonce) { |
6fc6879b JM |
1054 | if (wpa_verify_key_mic(&sm->PTK, data, data_len)) { |
1055 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1056 | "received EAPOL-Key with invalid MIC"); | |
1057 | return; | |
1058 | } | |
1059 | sm->MICVerified = TRUE; | |
1060 | eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm); | |
e4bf4db9 | 1061 | sm->pending_1_of_4_timeout = 0; |
6fc6879b JM |
1062 | } |
1063 | ||
1064 | if (key_info & WPA_KEY_INFO_REQUEST) { | |
1065 | if (sm->MICVerified) { | |
1066 | sm->req_replay_counter_used = 1; | |
1067 | os_memcpy(sm->req_replay_counter, key->replay_counter, | |
1068 | WPA_REPLAY_COUNTER_LEN); | |
1069 | } else { | |
1070 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1071 | "received EAPOL-Key request with " | |
1072 | "invalid MIC"); | |
1073 | return; | |
1074 | } | |
1075 | ||
1076 | /* | |
1077 | * TODO: should decrypt key data field if encryption was used; | |
1078 | * even though MAC address KDE is not normally encrypted, | |
1079 | * supplicant is allowed to encrypt it. | |
1080 | */ | |
1081 | if (msg == SMK_ERROR) { | |
1082 | #ifdef CONFIG_PEERKEY | |
1083 | wpa_smk_error(wpa_auth, sm, key); | |
1084 | #endif /* CONFIG_PEERKEY */ | |
1085 | return; | |
1086 | } else if (key_info & WPA_KEY_INFO_ERROR) { | |
c772d054 JM |
1087 | if (wpa_receive_error_report( |
1088 | wpa_auth, sm, | |
1089 | !(key_info & WPA_KEY_INFO_KEY_TYPE)) > 0) | |
1090 | return; /* STA entry was removed */ | |
6fc6879b JM |
1091 | } else if (key_info & WPA_KEY_INFO_KEY_TYPE) { |
1092 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1093 | "received EAPOL-Key Request for new " | |
1094 | "4-Way Handshake"); | |
1095 | wpa_request_new_ptk(sm); | |
1096 | #ifdef CONFIG_PEERKEY | |
1097 | } else if (msg == SMK_M1) { | |
1098 | wpa_smk_m1(wpa_auth, sm, key); | |
1099 | #endif /* CONFIG_PEERKEY */ | |
1100 | } else if (key_data_length > 0 && | |
1101 | wpa_parse_kde_ies((const u8 *) (key + 1), | |
1102 | key_data_length, &kde) == 0 && | |
1103 | kde.mac_addr) { | |
1104 | } else { | |
1105 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1106 | "received EAPOL-Key Request for GTK " | |
1107 | "rekeying"); | |
6fc6879b JM |
1108 | eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL); |
1109 | wpa_rekey_gtk(wpa_auth, NULL); | |
1110 | } | |
1111 | } else { | |
68921e24 JM |
1112 | /* Do not allow the same key replay counter to be reused. */ |
1113 | wpa_replay_counter_mark_invalid(sm->key_replay, | |
1114 | key->replay_counter); | |
1115 | ||
1116 | if (msg == PAIRWISE_2) { | |
1117 | /* | |
1118 | * Maintain a copy of the pending EAPOL-Key frames in | |
1119 | * case the EAPOL-Key frame was retransmitted. This is | |
1120 | * needed to allow EAPOL-Key msg 2/4 reply to another | |
1121 | * pending msg 1/4 to update the SNonce to work around | |
1122 | * unexpected supplicant behavior. | |
1123 | */ | |
1124 | os_memcpy(sm->prev_key_replay, sm->key_replay, | |
1125 | sizeof(sm->key_replay)); | |
1126 | } else { | |
1127 | os_memset(sm->prev_key_replay, 0, | |
1128 | sizeof(sm->prev_key_replay)); | |
1129 | } | |
1130 | ||
1131 | /* | |
1132 | * Make sure old valid counters are not accepted anymore and | |
1133 | * do not get copied again. | |
1134 | */ | |
1135 | wpa_replay_counter_mark_invalid(sm->key_replay, NULL); | |
6fc6879b JM |
1136 | } |
1137 | ||
1138 | #ifdef CONFIG_PEERKEY | |
1139 | if (msg == SMK_M3) { | |
1140 | wpa_smk_m3(wpa_auth, sm, key); | |
1141 | return; | |
1142 | } | |
1143 | #endif /* CONFIG_PEERKEY */ | |
1144 | ||
1145 | os_free(sm->last_rx_eapol_key); | |
1146 | sm->last_rx_eapol_key = os_malloc(data_len); | |
1147 | if (sm->last_rx_eapol_key == NULL) | |
1148 | return; | |
1149 | os_memcpy(sm->last_rx_eapol_key, data, data_len); | |
1150 | sm->last_rx_eapol_key_len = data_len; | |
1151 | ||
0d442aff | 1152 | sm->rx_eapol_key_secure = !!(key_info & WPA_KEY_INFO_SECURE); |
6fc6879b JM |
1153 | sm->EAPOLKeyReceived = TRUE; |
1154 | sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE); | |
1155 | sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST); | |
1156 | os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN); | |
1157 | wpa_sm_step(sm); | |
1158 | } | |
1159 | ||
1160 | ||
3c7302c2 JM |
1161 | static int wpa_gmk_to_gtk(const u8 *gmk, const char *label, const u8 *addr, |
1162 | const u8 *gnonce, u8 *gtk, size_t gtk_len) | |
6fc6879b | 1163 | { |
5cb9d5c3 JM |
1164 | u8 data[ETH_ALEN + WPA_NONCE_LEN + 8 + 16]; |
1165 | u8 *pos; | |
3c7302c2 | 1166 | int ret = 0; |
6fc6879b | 1167 | |
5cb9d5c3 JM |
1168 | /* GTK = PRF-X(GMK, "Group key expansion", |
1169 | * AA || GNonce || Time || random data) | |
1170 | * The example described in the IEEE 802.11 standard uses only AA and | |
1171 | * GNonce as inputs here. Add some more entropy since this derivation | |
1172 | * is done only at the Authenticator and as such, does not need to be | |
1173 | * exactly same. | |
1174 | */ | |
6fc6879b JM |
1175 | os_memcpy(data, addr, ETH_ALEN); |
1176 | os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN); | |
5cb9d5c3 JM |
1177 | pos = data + ETH_ALEN + WPA_NONCE_LEN; |
1178 | wpa_get_ntp_timestamp(pos); | |
1179 | pos += 8; | |
3642c431 | 1180 | if (random_get_bytes(pos, 16) < 0) |
3c7302c2 | 1181 | ret = -1; |
6fc6879b | 1182 | |
56586197 | 1183 | #ifdef CONFIG_IEEE80211W |
5cb9d5c3 | 1184 | sha256_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len); |
56586197 | 1185 | #else /* CONFIG_IEEE80211W */ |
3c7302c2 JM |
1186 | if (sha1_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len) |
1187 | < 0) | |
1188 | ret = -1; | |
56586197 | 1189 | #endif /* CONFIG_IEEE80211W */ |
3c7302c2 JM |
1190 | |
1191 | return ret; | |
6fc6879b JM |
1192 | } |
1193 | ||
1194 | ||
1195 | static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx) | |
1196 | { | |
1197 | struct wpa_authenticator *wpa_auth = eloop_ctx; | |
1198 | struct wpa_state_machine *sm = timeout_ctx; | |
1199 | ||
e4bf4db9 | 1200 | sm->pending_1_of_4_timeout = 0; |
6fc6879b JM |
1201 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout"); |
1202 | sm->TimeoutEvt = TRUE; | |
1203 | wpa_sm_step(sm); | |
1204 | } | |
1205 | ||
1206 | ||
1207 | void __wpa_send_eapol(struct wpa_authenticator *wpa_auth, | |
1208 | struct wpa_state_machine *sm, int key_info, | |
1209 | const u8 *key_rsc, const u8 *nonce, | |
1210 | const u8 *kde, size_t kde_len, | |
1211 | int keyidx, int encr, int force_version) | |
1212 | { | |
1213 | struct ieee802_1x_hdr *hdr; | |
1214 | struct wpa_eapol_key *key; | |
1215 | size_t len; | |
1216 | int alg; | |
1217 | int key_data_len, pad_len = 0; | |
1218 | u8 *buf, *pos; | |
1219 | int version, pairwise; | |
22a299ee | 1220 | int i; |
6fc6879b JM |
1221 | |
1222 | len = sizeof(struct ieee802_1x_hdr) + sizeof(struct wpa_eapol_key); | |
1223 | ||
1224 | if (force_version) | |
1225 | version = force_version; | |
1226 | else if (wpa_use_aes_cmac(sm)) | |
1227 | version = WPA_KEY_INFO_TYPE_AES_128_CMAC; | |
eb7719ff | 1228 | else if (sm->pairwise != WPA_CIPHER_TKIP) |
6fc6879b JM |
1229 | version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES; |
1230 | else | |
1231 | version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4; | |
1232 | ||
1233 | pairwise = key_info & WPA_KEY_INFO_KEY_TYPE; | |
1234 | ||
1235 | wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d " | |
1236 | "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d " | |
1237 | "encr=%d)", | |
1238 | version, | |
1239 | (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0, | |
1240 | (key_info & WPA_KEY_INFO_MIC) ? 1 : 0, | |
1241 | (key_info & WPA_KEY_INFO_ACK) ? 1 : 0, | |
1242 | (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0, | |
1243 | pairwise, (unsigned long) kde_len, keyidx, encr); | |
1244 | ||
1245 | key_data_len = kde_len; | |
1246 | ||
1247 | if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || | |
1248 | version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) { | |
1249 | pad_len = key_data_len % 8; | |
1250 | if (pad_len) | |
1251 | pad_len = 8 - pad_len; | |
1252 | key_data_len += pad_len + 8; | |
1253 | } | |
1254 | ||
1255 | len += key_data_len; | |
1256 | ||
1257 | hdr = os_zalloc(len); | |
1258 | if (hdr == NULL) | |
1259 | return; | |
1260 | hdr->version = wpa_auth->conf.eapol_version; | |
1261 | hdr->type = IEEE802_1X_TYPE_EAPOL_KEY; | |
1262 | hdr->length = host_to_be16(len - sizeof(*hdr)); | |
1263 | key = (struct wpa_eapol_key *) (hdr + 1); | |
1264 | ||
1265 | key->type = sm->wpa == WPA_VERSION_WPA2 ? | |
1266 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; | |
1267 | key_info |= version; | |
1268 | if (encr && sm->wpa == WPA_VERSION_WPA2) | |
1269 | key_info |= WPA_KEY_INFO_ENCR_KEY_DATA; | |
1270 | if (sm->wpa != WPA_VERSION_WPA2) | |
1271 | key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT; | |
1272 | WPA_PUT_BE16(key->key_info, key_info); | |
1273 | ||
1274 | alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group; | |
c3550295 | 1275 | WPA_PUT_BE16(key->key_length, wpa_cipher_key_len(alg)); |
6fc6879b JM |
1276 | if (key_info & WPA_KEY_INFO_SMK_MESSAGE) |
1277 | WPA_PUT_BE16(key->key_length, 0); | |
1278 | ||
1279 | /* FIX: STSL: what to use as key_replay_counter? */ | |
22a299ee JM |
1280 | for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) { |
1281 | sm->key_replay[i].valid = sm->key_replay[i - 1].valid; | |
1282 | os_memcpy(sm->key_replay[i].counter, | |
1283 | sm->key_replay[i - 1].counter, | |
1284 | WPA_REPLAY_COUNTER_LEN); | |
1285 | } | |
1286 | inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN); | |
1287 | os_memcpy(key->replay_counter, sm->key_replay[0].counter, | |
6fc6879b | 1288 | WPA_REPLAY_COUNTER_LEN); |
22a299ee | 1289 | sm->key_replay[0].valid = TRUE; |
6fc6879b JM |
1290 | |
1291 | if (nonce) | |
1292 | os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN); | |
1293 | ||
1294 | if (key_rsc) | |
1295 | os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN); | |
1296 | ||
1297 | if (kde && !encr) { | |
1298 | os_memcpy(key + 1, kde, kde_len); | |
1299 | WPA_PUT_BE16(key->key_data_length, kde_len); | |
1300 | } else if (encr && kde) { | |
1301 | buf = os_zalloc(key_data_len); | |
1302 | if (buf == NULL) { | |
1303 | os_free(hdr); | |
1304 | return; | |
1305 | } | |
1306 | pos = buf; | |
1307 | os_memcpy(pos, kde, kde_len); | |
1308 | pos += kde_len; | |
1309 | ||
1310 | if (pad_len) | |
1311 | *pos++ = 0xdd; | |
1312 | ||
1313 | wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data", | |
1314 | buf, key_data_len); | |
1315 | if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || | |
1316 | version == WPA_KEY_INFO_TYPE_AES_128_CMAC) { | |
1317 | if (aes_wrap(sm->PTK.kek, (key_data_len - 8) / 8, buf, | |
1318 | (u8 *) (key + 1))) { | |
1319 | os_free(hdr); | |
1320 | os_free(buf); | |
1321 | return; | |
1322 | } | |
1323 | WPA_PUT_BE16(key->key_data_length, key_data_len); | |
1324 | } else { | |
1325 | u8 ek[32]; | |
1326 | os_memcpy(key->key_iv, | |
1327 | sm->group->Counter + WPA_NONCE_LEN - 16, 16); | |
1328 | inc_byte_array(sm->group->Counter, WPA_NONCE_LEN); | |
1329 | os_memcpy(ek, key->key_iv, 16); | |
1330 | os_memcpy(ek + 16, sm->PTK.kek, 16); | |
1331 | os_memcpy(key + 1, buf, key_data_len); | |
1332 | rc4_skip(ek, 32, 256, (u8 *) (key + 1), key_data_len); | |
1333 | WPA_PUT_BE16(key->key_data_length, key_data_len); | |
1334 | } | |
1335 | os_free(buf); | |
1336 | } | |
1337 | ||
1338 | if (key_info & WPA_KEY_INFO_MIC) { | |
1339 | if (!sm->PTK_valid) { | |
1340 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1341 | "PTK not valid when sending EAPOL-Key " | |
1342 | "frame"); | |
1343 | os_free(hdr); | |
1344 | return; | |
1345 | } | |
1346 | wpa_eapol_key_mic(sm->PTK.kck, version, (u8 *) hdr, len, | |
1347 | key->key_mic); | |
1348 | } | |
1349 | ||
1350 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx, | |
1351 | 1); | |
1352 | wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len, | |
1353 | sm->pairwise_set); | |
1354 | os_free(hdr); | |
1355 | } | |
1356 | ||
1357 | ||
1358 | static void wpa_send_eapol(struct wpa_authenticator *wpa_auth, | |
1359 | struct wpa_state_machine *sm, int key_info, | |
1360 | const u8 *key_rsc, const u8 *nonce, | |
1361 | const u8 *kde, size_t kde_len, | |
1362 | int keyidx, int encr) | |
1363 | { | |
1364 | int timeout_ms; | |
1365 | int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE; | |
bae61562 | 1366 | int ctr; |
6fc6879b JM |
1367 | |
1368 | if (sm == NULL) | |
1369 | return; | |
1370 | ||
1371 | __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len, | |
1372 | keyidx, encr, 0); | |
1373 | ||
bae61562 | 1374 | ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr; |
e4bf4db9 | 1375 | if (ctr == 1 && wpa_auth->conf.tx_status) |
00338a4f JM |
1376 | timeout_ms = pairwise ? eapol_key_timeout_first : |
1377 | eapol_key_timeout_first_group; | |
bae61562 JM |
1378 | else |
1379 | timeout_ms = eapol_key_timeout_subseq; | |
e4bf4db9 JM |
1380 | if (pairwise && ctr == 1 && !(key_info & WPA_KEY_INFO_MIC)) |
1381 | sm->pending_1_of_4_timeout = 1; | |
1382 | wpa_printf(MSG_DEBUG, "WPA: Use EAPOL-Key timeout of %u ms (retry " | |
1383 | "counter %d)", timeout_ms, ctr); | |
6fc6879b JM |
1384 | eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000, |
1385 | wpa_send_eapol_timeout, wpa_auth, sm); | |
1386 | } | |
1387 | ||
1388 | ||
1389 | static int wpa_verify_key_mic(struct wpa_ptk *PTK, u8 *data, size_t data_len) | |
1390 | { | |
1391 | struct ieee802_1x_hdr *hdr; | |
1392 | struct wpa_eapol_key *key; | |
1393 | u16 key_info; | |
1394 | int ret = 0; | |
1395 | u8 mic[16]; | |
1396 | ||
1397 | if (data_len < sizeof(*hdr) + sizeof(*key)) | |
1398 | return -1; | |
1399 | ||
1400 | hdr = (struct ieee802_1x_hdr *) data; | |
1401 | key = (struct wpa_eapol_key *) (hdr + 1); | |
1402 | key_info = WPA_GET_BE16(key->key_info); | |
1403 | os_memcpy(mic, key->key_mic, 16); | |
1404 | os_memset(key->key_mic, 0, 16); | |
1405 | if (wpa_eapol_key_mic(PTK->kck, key_info & WPA_KEY_INFO_TYPE_MASK, | |
1406 | data, data_len, key->key_mic) || | |
1407 | os_memcmp(mic, key->key_mic, 16) != 0) | |
1408 | ret = -1; | |
1409 | os_memcpy(key->key_mic, mic, 16); | |
1410 | return ret; | |
1411 | } | |
1412 | ||
1413 | ||
1414 | void wpa_remove_ptk(struct wpa_state_machine *sm) | |
1415 | { | |
1416 | sm->PTK_valid = FALSE; | |
1417 | os_memset(&sm->PTK, 0, sizeof(sm->PTK)); | |
26083221 | 1418 | wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, NULL, 0); |
6fc6879b | 1419 | sm->pairwise_set = FALSE; |
581a8cde | 1420 | eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm); |
6fc6879b JM |
1421 | } |
1422 | ||
1423 | ||
6f9b5d16 | 1424 | int wpa_auth_sm_event(struct wpa_state_machine *sm, wpa_event event) |
6fc6879b | 1425 | { |
5d22a1d5 JM |
1426 | int remove_ptk = 1; |
1427 | ||
6fc6879b | 1428 | if (sm == NULL) |
6f9b5d16 | 1429 | return -1; |
6fc6879b JM |
1430 | |
1431 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
1432 | "event %d notification", event); | |
1433 | ||
1434 | switch (event) { | |
1435 | case WPA_AUTH: | |
1436 | case WPA_ASSOC: | |
1437 | break; | |
1438 | case WPA_DEAUTH: | |
1439 | case WPA_DISASSOC: | |
1440 | sm->DeauthenticationRequest = TRUE; | |
1441 | break; | |
1442 | case WPA_REAUTH: | |
1443 | case WPA_REAUTH_EAPOL: | |
3ab72b62 JM |
1444 | if (!sm->started) { |
1445 | /* | |
1446 | * When using WPS, we may end up here if the STA | |
1447 | * manages to re-associate without the previous STA | |
1448 | * entry getting removed. Consequently, we need to make | |
1449 | * sure that the WPA state machines gets initialized | |
1450 | * properly at this point. | |
1451 | */ | |
1452 | wpa_printf(MSG_DEBUG, "WPA state machine had not been " | |
1453 | "started - initialize now"); | |
1454 | sm->started = 1; | |
1455 | sm->Init = TRUE; | |
1456 | if (wpa_sm_step(sm) == 1) | |
1457 | return 1; /* should not really happen */ | |
1458 | sm->Init = FALSE; | |
1459 | sm->AuthenticationRequest = TRUE; | |
1460 | break; | |
1461 | } | |
9663596f JM |
1462 | if (sm->GUpdateStationKeys) { |
1463 | /* | |
1464 | * Reauthentication cancels the pending group key | |
1465 | * update for this STA. | |
1466 | */ | |
1467 | sm->group->GKeyDoneStations--; | |
1468 | sm->GUpdateStationKeys = FALSE; | |
1469 | sm->PtkGroupInit = TRUE; | |
1470 | } | |
6fc6879b JM |
1471 | sm->ReAuthenticationRequest = TRUE; |
1472 | break; | |
1473 | case WPA_ASSOC_FT: | |
1474 | #ifdef CONFIG_IEEE80211R | |
81a658d7 JM |
1475 | wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration " |
1476 | "after association"); | |
1477 | wpa_ft_install_ptk(sm); | |
1478 | ||
6fc6879b JM |
1479 | /* Using FT protocol, not WPA auth state machine */ |
1480 | sm->ft_completed = 1; | |
6f9b5d16 | 1481 | return 0; |
6fc6879b JM |
1482 | #else /* CONFIG_IEEE80211R */ |
1483 | break; | |
1484 | #endif /* CONFIG_IEEE80211R */ | |
1485 | } | |
1486 | ||
1487 | #ifdef CONFIG_IEEE80211R | |
1488 | sm->ft_completed = 0; | |
1489 | #endif /* CONFIG_IEEE80211R */ | |
1490 | ||
5d22a1d5 JM |
1491 | #ifdef CONFIG_IEEE80211W |
1492 | if (sm->mgmt_frame_prot && event == WPA_AUTH) | |
1493 | remove_ptk = 0; | |
1494 | #endif /* CONFIG_IEEE80211W */ | |
6fc6879b | 1495 | |
5d22a1d5 JM |
1496 | if (remove_ptk) { |
1497 | sm->PTK_valid = FALSE; | |
1498 | os_memset(&sm->PTK, 0, sizeof(sm->PTK)); | |
1499 | ||
1500 | if (event != WPA_REAUTH_EAPOL) | |
1501 | wpa_remove_ptk(sm); | |
1502 | } | |
6fc6879b | 1503 | |
6f9b5d16 | 1504 | return wpa_sm_step(sm); |
6fc6879b JM |
1505 | } |
1506 | ||
1507 | ||
6fc6879b JM |
1508 | SM_STATE(WPA_PTK, INITIALIZE) |
1509 | { | |
1510 | SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk); | |
1511 | if (sm->Init) { | |
1512 | /* Init flag is not cleared here, so avoid busy | |
1513 | * loop by claiming nothing changed. */ | |
1514 | sm->changed = FALSE; | |
1515 | } | |
1516 | ||
1517 | sm->keycount = 0; | |
1518 | if (sm->GUpdateStationKeys) | |
1519 | sm->group->GKeyDoneStations--; | |
1520 | sm->GUpdateStationKeys = FALSE; | |
1521 | if (sm->wpa == WPA_VERSION_WPA) | |
1522 | sm->PInitAKeys = FALSE; | |
1523 | if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and | |
1524 | * Local AA > Remote AA)) */) { | |
1525 | sm->Pair = TRUE; | |
1526 | } | |
1527 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0); | |
1528 | wpa_remove_ptk(sm); | |
1529 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0); | |
1530 | sm->TimeoutCtr = 0; | |
56586197 | 1531 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) { |
6fc6879b JM |
1532 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, |
1533 | WPA_EAPOL_authorized, 0); | |
1534 | } | |
1535 | } | |
1536 | ||
1537 | ||
1538 | SM_STATE(WPA_PTK, DISCONNECT) | |
1539 | { | |
1540 | SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk); | |
1541 | sm->Disconnect = FALSE; | |
1542 | wpa_sta_disconnect(sm->wpa_auth, sm->addr); | |
1543 | } | |
1544 | ||
1545 | ||
1546 | SM_STATE(WPA_PTK, DISCONNECTED) | |
1547 | { | |
1548 | SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk); | |
1549 | sm->DeauthenticationRequest = FALSE; | |
1550 | } | |
1551 | ||
1552 | ||
1553 | SM_STATE(WPA_PTK, AUTHENTICATION) | |
1554 | { | |
1555 | SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk); | |
1556 | os_memset(&sm->PTK, 0, sizeof(sm->PTK)); | |
1557 | sm->PTK_valid = FALSE; | |
1558 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto, | |
1559 | 1); | |
1560 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1); | |
1561 | sm->AuthenticationRequest = FALSE; | |
1562 | } | |
1563 | ||
1564 | ||
40d00d2b NC |
1565 | static void wpa_group_ensure_init(struct wpa_authenticator *wpa_auth, |
1566 | struct wpa_group *group) | |
1bdb7ab3 | 1567 | { |
40d00d2b NC |
1568 | if (group->first_sta_seen) |
1569 | return; | |
1bdb7ab3 JM |
1570 | /* |
1571 | * System has run bit further than at the time hostapd was started | |
1572 | * potentially very early during boot up. This provides better chances | |
1573 | * of collecting more randomness on embedded systems. Re-initialize the | |
1574 | * GMK and Counter here to improve their strength if there was not | |
1575 | * enough entropy available immediately after system startup. | |
1576 | */ | |
1577 | wpa_printf(MSG_DEBUG, "WPA: Re-initialize GMK/Counter on first " | |
1578 | "station"); | |
08704cd8 JM |
1579 | if (random_pool_ready() != 1) { |
1580 | wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool " | |
1581 | "to proceed - reject first 4-way handshake"); | |
1582 | group->reject_4way_hs_for_entropy = TRUE; | |
40d00d2b NC |
1583 | } else { |
1584 | group->first_sta_seen = TRUE; | |
1585 | group->reject_4way_hs_for_entropy = FALSE; | |
08704cd8 | 1586 | } |
40d00d2b | 1587 | |
1bdb7ab3 JM |
1588 | wpa_group_init_gmk_and_counter(wpa_auth, group); |
1589 | wpa_gtk_update(wpa_auth, group); | |
1590 | wpa_group_config_group_keys(wpa_auth, group); | |
1591 | } | |
1592 | ||
1593 | ||
6fc6879b JM |
1594 | SM_STATE(WPA_PTK, AUTHENTICATION2) |
1595 | { | |
1596 | SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk); | |
1bdb7ab3 | 1597 | |
40d00d2b | 1598 | wpa_group_ensure_init(sm->wpa_auth, sm->group); |
1bdb7ab3 | 1599 | |
3825a19b JM |
1600 | /* |
1601 | * Definition of ANonce selection in IEEE Std 802.11i-2004 is somewhat | |
1602 | * ambiguous. The Authenticator state machine uses a counter that is | |
1603 | * incremented by one for each 4-way handshake. However, the security | |
1604 | * analysis of 4-way handshake points out that unpredictable nonces | |
1605 | * help in preventing precomputation attacks. Instead of the state | |
1606 | * machine definition, use an unpredictable nonce value here to provide | |
1607 | * stronger protection against potential precomputation attacks. | |
1608 | */ | |
1609 | if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) { | |
1610 | wpa_printf(MSG_ERROR, "WPA: Failed to get random data for " | |
1611 | "ANonce."); | |
1612 | wpa_sta_disconnect(sm->wpa_auth, sm->addr); | |
1613 | return; | |
1614 | } | |
bc8318ac JM |
1615 | wpa_hexdump(MSG_DEBUG, "WPA: Assign ANonce", sm->ANonce, |
1616 | WPA_NONCE_LEN); | |
6fc6879b JM |
1617 | sm->ReAuthenticationRequest = FALSE; |
1618 | /* IEEE 802.11i does not clear TimeoutCtr here, but this is more | |
1619 | * logical place than INITIALIZE since AUTHENTICATION2 can be | |
1620 | * re-entered on ReAuthenticationRequest without going through | |
1621 | * INITIALIZE. */ | |
1622 | sm->TimeoutCtr = 0; | |
1623 | } | |
1624 | ||
1625 | ||
1626 | SM_STATE(WPA_PTK, INITPMK) | |
1627 | { | |
1628 | u8 msk[2 * PMK_LEN]; | |
1629 | size_t len = 2 * PMK_LEN; | |
1630 | ||
1631 | SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk); | |
1632 | #ifdef CONFIG_IEEE80211R | |
1633 | sm->xxkey_len = 0; | |
1634 | #endif /* CONFIG_IEEE80211R */ | |
1635 | if (sm->pmksa) { | |
1636 | wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache"); | |
1637 | os_memcpy(sm->PMK, sm->pmksa->pmk, PMK_LEN); | |
1638 | } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) { | |
1639 | wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine " | |
1640 | "(len=%lu)", (unsigned long) len); | |
1641 | os_memcpy(sm->PMK, msk, PMK_LEN); | |
1642 | #ifdef CONFIG_IEEE80211R | |
1643 | if (len >= 2 * PMK_LEN) { | |
1644 | os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN); | |
1645 | sm->xxkey_len = PMK_LEN; | |
1646 | } | |
1647 | #endif /* CONFIG_IEEE80211R */ | |
1648 | } else { | |
1649 | wpa_printf(MSG_DEBUG, "WPA: Could not get PMK"); | |
1650 | } | |
1651 | ||
1652 | sm->req_replay_counter_used = 0; | |
1653 | /* IEEE 802.11i does not set keyRun to FALSE, but not doing this | |
1654 | * will break reauthentication since EAPOL state machines may not be | |
1655 | * get into AUTHENTICATING state that clears keyRun before WPA state | |
1656 | * machine enters AUTHENTICATION2 state and goes immediately to INITPMK | |
1657 | * state and takes PMK from the previously used AAA Key. This will | |
1658 | * eventually fail in 4-Way Handshake because Supplicant uses PMK | |
1659 | * derived from the new AAA Key. Setting keyRun = FALSE here seems to | |
1660 | * be good workaround for this issue. */ | |
1661 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0); | |
1662 | } | |
1663 | ||
1664 | ||
1665 | SM_STATE(WPA_PTK, INITPSK) | |
1666 | { | |
1667 | const u8 *psk; | |
1668 | SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk); | |
1669 | psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL); | |
1670 | if (psk) { | |
1671 | os_memcpy(sm->PMK, psk, PMK_LEN); | |
1672 | #ifdef CONFIG_IEEE80211R | |
1673 | os_memcpy(sm->xxkey, psk, PMK_LEN); | |
1674 | sm->xxkey_len = PMK_LEN; | |
1675 | #endif /* CONFIG_IEEE80211R */ | |
1676 | } | |
1677 | sm->req_replay_counter_used = 0; | |
1678 | } | |
1679 | ||
1680 | ||
1681 | SM_STATE(WPA_PTK, PTKSTART) | |
1682 | { | |
1683 | u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL; | |
1684 | size_t pmkid_len = 0; | |
1685 | ||
1686 | SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk); | |
1687 | sm->PTKRequest = FALSE; | |
1688 | sm->TimeoutEvt = FALSE; | |
bae61562 JM |
1689 | |
1690 | sm->TimeoutCtr++; | |
1691 | if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) { | |
1692 | /* No point in sending the EAPOL-Key - we will disconnect | |
1693 | * immediately following this. */ | |
1694 | return; | |
1695 | } | |
1696 | ||
6fc6879b JM |
1697 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, |
1698 | "sending 1/4 msg of 4-Way Handshake"); | |
1699 | /* | |
1700 | * TODO: Could add PMKID even with WPA2-PSK, but only if there is only | |
1701 | * one possible PSK for this STA. | |
1702 | */ | |
1703 | if (sm->wpa == WPA_VERSION_WPA2 && | |
56586197 | 1704 | wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt)) { |
6fc6879b JM |
1705 | pmkid = buf; |
1706 | pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN; | |
1707 | pmkid[0] = WLAN_EID_VENDOR_SPECIFIC; | |
1708 | pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN; | |
1709 | RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID); | |
1710 | if (sm->pmksa) | |
1711 | os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN], | |
1712 | sm->pmksa->pmkid, PMKID_LEN); | |
1713 | else { | |
1714 | /* | |
1715 | * Calculate PMKID since no PMKSA cache entry was | |
1716 | * available with pre-calculated PMKID. | |
1717 | */ | |
1718 | rsn_pmkid(sm->PMK, PMK_LEN, sm->wpa_auth->addr, | |
56586197 JM |
1719 | sm->addr, &pmkid[2 + RSN_SELECTOR_LEN], |
1720 | wpa_key_mgmt_sha256(sm->wpa_key_mgmt)); | |
6fc6879b JM |
1721 | } |
1722 | } | |
1723 | wpa_send_eapol(sm->wpa_auth, sm, | |
1724 | WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL, | |
1725 | sm->ANonce, pmkid, pmkid_len, 0, 0); | |
6fc6879b JM |
1726 | } |
1727 | ||
1728 | ||
1729 | static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *pmk, | |
1730 | struct wpa_ptk *ptk) | |
1731 | { | |
eb7719ff | 1732 | size_t ptk_len = sm->pairwise != WPA_CIPHER_TKIP ? 48 : 64; |
6fc6879b | 1733 | #ifdef CONFIG_IEEE80211R |
56586197 | 1734 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) |
c0a61908 | 1735 | return wpa_auth_derive_ptk_ft(sm, pmk, ptk, ptk_len); |
6fc6879b JM |
1736 | #endif /* CONFIG_IEEE80211R */ |
1737 | ||
1738 | wpa_pmk_to_ptk(pmk, PMK_LEN, "Pairwise key expansion", | |
1739 | sm->wpa_auth->addr, sm->addr, sm->ANonce, sm->SNonce, | |
c0a61908 | 1740 | (u8 *) ptk, ptk_len, |
56586197 | 1741 | wpa_key_mgmt_sha256(sm->wpa_key_mgmt)); |
6fc6879b JM |
1742 | |
1743 | return 0; | |
1744 | } | |
1745 | ||
1746 | ||
1747 | SM_STATE(WPA_PTK, PTKCALCNEGOTIATING) | |
1748 | { | |
1749 | struct wpa_ptk PTK; | |
1750 | int ok = 0; | |
1751 | const u8 *pmk = NULL; | |
1752 | ||
1753 | SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk); | |
1754 | sm->EAPOLKeyReceived = FALSE; | |
68921e24 | 1755 | sm->update_snonce = FALSE; |
6fc6879b JM |
1756 | |
1757 | /* WPA with IEEE 802.1X: use the derived PMK from EAP | |
1758 | * WPA-PSK: iterate through possible PSKs and select the one matching | |
1759 | * the packet */ | |
1760 | for (;;) { | |
56586197 | 1761 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) { |
6fc6879b JM |
1762 | pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, pmk); |
1763 | if (pmk == NULL) | |
1764 | break; | |
1765 | } else | |
1766 | pmk = sm->PMK; | |
1767 | ||
1768 | wpa_derive_ptk(sm, pmk, &PTK); | |
1769 | ||
1770 | if (wpa_verify_key_mic(&PTK, sm->last_rx_eapol_key, | |
1771 | sm->last_rx_eapol_key_len) == 0) { | |
1772 | ok = 1; | |
1773 | break; | |
1774 | } | |
1775 | ||
56586197 | 1776 | if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) |
6fc6879b JM |
1777 | break; |
1778 | } | |
1779 | ||
1780 | if (!ok) { | |
1781 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
1782 | "invalid MIC in msg 2/4 of 4-Way Handshake"); | |
1783 | return; | |
1784 | } | |
1785 | ||
26e23750 JM |
1786 | #ifdef CONFIG_IEEE80211R |
1787 | if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { | |
1788 | /* | |
1789 | * Verify that PMKR1Name from EAPOL-Key message 2/4 matches | |
1790 | * with the value we derived. | |
1791 | */ | |
1792 | if (os_memcmp(sm->sup_pmk_r1_name, sm->pmk_r1_name, | |
1793 | WPA_PMK_NAME_LEN) != 0) { | |
1794 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
1795 | "PMKR1Name mismatch in FT 4-way " | |
1796 | "handshake"); | |
1797 | wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from " | |
1798 | "Supplicant", | |
1799 | sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN); | |
1800 | wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name", | |
1801 | sm->pmk_r1_name, WPA_PMK_NAME_LEN); | |
1802 | return; | |
1803 | } | |
1804 | } | |
1805 | #endif /* CONFIG_IEEE80211R */ | |
1806 | ||
e4bf4db9 | 1807 | sm->pending_1_of_4_timeout = 0; |
6fc6879b JM |
1808 | eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm); |
1809 | ||
56586197 | 1810 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) { |
6fc6879b JM |
1811 | /* PSK may have changed from the previous choice, so update |
1812 | * state machine data based on whatever PSK was selected here. | |
1813 | */ | |
1814 | os_memcpy(sm->PMK, pmk, PMK_LEN); | |
1815 | } | |
1816 | ||
1817 | sm->MICVerified = TRUE; | |
1818 | ||
1819 | os_memcpy(&sm->PTK, &PTK, sizeof(PTK)); | |
1820 | sm->PTK_valid = TRUE; | |
1821 | } | |
1822 | ||
1823 | ||
1824 | SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2) | |
1825 | { | |
1826 | SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk); | |
1827 | sm->TimeoutCtr = 0; | |
1828 | } | |
1829 | ||
1830 | ||
1831 | #ifdef CONFIG_IEEE80211W | |
1832 | ||
1833 | static int ieee80211w_kde_len(struct wpa_state_machine *sm) | |
1834 | { | |
1835 | if (sm->mgmt_frame_prot) { | |
1836 | return 2 + RSN_SELECTOR_LEN + sizeof(struct wpa_igtk_kde); | |
1837 | } | |
1838 | ||
1839 | return 0; | |
1840 | } | |
1841 | ||
1842 | ||
1843 | static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos) | |
1844 | { | |
1845 | struct wpa_igtk_kde igtk; | |
1846 | struct wpa_group *gsm = sm->group; | |
1847 | ||
1848 | if (!sm->mgmt_frame_prot) | |
1849 | return pos; | |
1850 | ||
1851 | igtk.keyid[0] = gsm->GN_igtk; | |
1852 | igtk.keyid[1] = 0; | |
7b1080da JM |
1853 | if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE || |
1854 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, igtk.pn) < 0) | |
6fc6879b JM |
1855 | os_memset(igtk.pn, 0, sizeof(igtk.pn)); |
1856 | os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], WPA_IGTK_LEN); | |
83421850 JM |
1857 | if (sm->wpa_auth->conf.disable_gtk) { |
1858 | /* | |
1859 | * Provide unique random IGTK to each STA to prevent use of | |
1860 | * IGTK in the BSS. | |
1861 | */ | |
1862 | if (random_get_bytes(igtk.igtk, WPA_IGTK_LEN) < 0) | |
1863 | return pos; | |
1864 | } | |
6fc6879b JM |
1865 | pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK, |
1866 | (const u8 *) &igtk, sizeof(igtk), NULL, 0); | |
1867 | ||
1868 | return pos; | |
1869 | } | |
1870 | ||
1871 | #else /* CONFIG_IEEE80211W */ | |
1872 | ||
1873 | static int ieee80211w_kde_len(struct wpa_state_machine *sm) | |
1874 | { | |
1875 | return 0; | |
1876 | } | |
1877 | ||
1878 | ||
1879 | static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos) | |
1880 | { | |
1881 | return pos; | |
1882 | } | |
1883 | ||
1884 | #endif /* CONFIG_IEEE80211W */ | |
1885 | ||
1886 | ||
1887 | SM_STATE(WPA_PTK, PTKINITNEGOTIATING) | |
1888 | { | |
83421850 | 1889 | u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos, dummy_gtk[32]; |
6fc6879b JM |
1890 | size_t gtk_len, kde_len; |
1891 | struct wpa_group *gsm = sm->group; | |
1892 | u8 *wpa_ie; | |
1893 | int wpa_ie_len, secure, keyidx, encr = 0; | |
1894 | ||
1895 | SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk); | |
1896 | sm->TimeoutEvt = FALSE; | |
bae61562 JM |
1897 | |
1898 | sm->TimeoutCtr++; | |
1899 | if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) { | |
1900 | /* No point in sending the EAPOL-Key - we will disconnect | |
1901 | * immediately following this. */ | |
1902 | return; | |
1903 | } | |
1904 | ||
86dfabb8 JM |
1905 | /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE], |
1906 | GTK[GN], IGTK, [FTIE], [TIE * 2]) | |
6fc6879b JM |
1907 | */ |
1908 | os_memset(rsc, 0, WPA_KEY_RSC_LEN); | |
1909 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc); | |
86dfabb8 | 1910 | /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */ |
6fc6879b JM |
1911 | wpa_ie = sm->wpa_auth->wpa_ie; |
1912 | wpa_ie_len = sm->wpa_auth->wpa_ie_len; | |
1913 | if (sm->wpa == WPA_VERSION_WPA && | |
1914 | (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) && | |
1915 | wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) { | |
1916 | /* WPA-only STA, remove RSN IE */ | |
1917 | wpa_ie = wpa_ie + wpa_ie[1] + 2; | |
1918 | wpa_ie_len = wpa_ie[1] + 2; | |
1919 | } | |
1920 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
1921 | "sending 3/4 msg of 4-Way Handshake"); | |
1922 | if (sm->wpa == WPA_VERSION_WPA2) { | |
1923 | /* WPA2 send GTK in the 4-way handshake */ | |
1924 | secure = 1; | |
1925 | gtk = gsm->GTK[gsm->GN - 1]; | |
1926 | gtk_len = gsm->GTK_len; | |
83421850 JM |
1927 | if (sm->wpa_auth->conf.disable_gtk) { |
1928 | /* | |
1929 | * Provide unique random GTK to each STA to prevent use | |
1930 | * of GTK in the BSS. | |
1931 | */ | |
1932 | if (random_get_bytes(dummy_gtk, gtk_len) < 0) | |
1933 | return; | |
1934 | gtk = dummy_gtk; | |
1935 | } | |
6fc6879b JM |
1936 | keyidx = gsm->GN; |
1937 | _rsc = rsc; | |
1938 | encr = 1; | |
1939 | } else { | |
1940 | /* WPA does not include GTK in msg 3/4 */ | |
1941 | secure = 0; | |
1942 | gtk = NULL; | |
1943 | gtk_len = 0; | |
1944 | keyidx = 0; | |
1945 | _rsc = NULL; | |
0d442aff JM |
1946 | if (sm->rx_eapol_key_secure) { |
1947 | /* | |
1948 | * It looks like Windows 7 supplicant tries to use | |
1949 | * Secure bit in msg 2/4 after having reported Michael | |
1950 | * MIC failure and it then rejects the 4-way handshake | |
1951 | * if msg 3/4 does not set Secure bit. Work around this | |
1952 | * by setting the Secure bit here even in the case of | |
1953 | * WPA if the supplicant used it first. | |
1954 | */ | |
1955 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
4740d5b9 JM |
1956 | "STA used Secure bit in WPA msg 2/4 - " |
1957 | "set Secure for 3/4 as workaround"); | |
0d442aff JM |
1958 | secure = 1; |
1959 | } | |
6fc6879b JM |
1960 | } |
1961 | ||
1962 | kde_len = wpa_ie_len + ieee80211w_kde_len(sm); | |
1963 | if (gtk) | |
1964 | kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len; | |
26e23750 | 1965 | #ifdef CONFIG_IEEE80211R |
86dfabb8 JM |
1966 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { |
1967 | kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */ | |
1968 | kde_len += 300; /* FTIE + 2 * TIE */ | |
1969 | } | |
26e23750 | 1970 | #endif /* CONFIG_IEEE80211R */ |
6fc6879b JM |
1971 | kde = os_malloc(kde_len); |
1972 | if (kde == NULL) | |
1973 | return; | |
1974 | ||
1975 | pos = kde; | |
1976 | os_memcpy(pos, wpa_ie, wpa_ie_len); | |
1977 | pos += wpa_ie_len; | |
26e23750 JM |
1978 | #ifdef CONFIG_IEEE80211R |
1979 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { | |
1980 | int res = wpa_insert_pmkid(kde, pos - kde, sm->pmk_r1_name); | |
1981 | if (res < 0) { | |
1982 | wpa_printf(MSG_ERROR, "FT: Failed to insert " | |
1983 | "PMKR1Name into RSN IE in EAPOL-Key data"); | |
1984 | os_free(kde); | |
1985 | return; | |
1986 | } | |
1987 | pos += res; | |
1988 | } | |
1989 | #endif /* CONFIG_IEEE80211R */ | |
6fc6879b JM |
1990 | if (gtk) { |
1991 | u8 hdr[2]; | |
1992 | hdr[0] = keyidx & 0x03; | |
1993 | hdr[1] = 0; | |
1994 | pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2, | |
1995 | gtk, gtk_len); | |
1996 | } | |
1997 | pos = ieee80211w_kde_add(sm, pos); | |
1998 | ||
86dfabb8 JM |
1999 | #ifdef CONFIG_IEEE80211R |
2000 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { | |
2001 | int res; | |
2002 | struct wpa_auth_config *conf; | |
2003 | ||
2004 | conf = &sm->wpa_auth->conf; | |
2005 | res = wpa_write_ftie(conf, conf->r0_key_holder, | |
2006 | conf->r0_key_holder_len, | |
2007 | NULL, NULL, pos, kde + kde_len - pos, | |
2008 | NULL, 0); | |
2009 | if (res < 0) { | |
2010 | wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE " | |
2011 | "into EAPOL-Key Key Data"); | |
2012 | os_free(kde); | |
2013 | return; | |
2014 | } | |
2015 | pos += res; | |
2016 | ||
2017 | /* TIE[ReassociationDeadline] (TU) */ | |
2018 | *pos++ = WLAN_EID_TIMEOUT_INTERVAL; | |
2019 | *pos++ = 5; | |
2020 | *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE; | |
2021 | WPA_PUT_LE32(pos, conf->reassociation_deadline); | |
2022 | pos += 4; | |
2023 | ||
2024 | /* TIE[KeyLifetime] (seconds) */ | |
2025 | *pos++ = WLAN_EID_TIMEOUT_INTERVAL; | |
2026 | *pos++ = 5; | |
2027 | *pos++ = WLAN_TIMEOUT_KEY_LIFETIME; | |
2028 | WPA_PUT_LE32(pos, conf->r0_key_lifetime * 60); | |
2029 | pos += 4; | |
2030 | } | |
2031 | #endif /* CONFIG_IEEE80211R */ | |
2032 | ||
6fc6879b JM |
2033 | wpa_send_eapol(sm->wpa_auth, sm, |
2034 | (secure ? WPA_KEY_INFO_SECURE : 0) | WPA_KEY_INFO_MIC | | |
2035 | WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL | | |
2036 | WPA_KEY_INFO_KEY_TYPE, | |
2037 | _rsc, sm->ANonce, kde, pos - kde, keyidx, encr); | |
2038 | os_free(kde); | |
6fc6879b JM |
2039 | } |
2040 | ||
2041 | ||
2042 | SM_STATE(WPA_PTK, PTKINITDONE) | |
2043 | { | |
2044 | SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk); | |
2045 | sm->EAPOLKeyReceived = FALSE; | |
2046 | if (sm->Pair) { | |
c3550295 JM |
2047 | enum wpa_alg alg = wpa_cipher_to_alg(sm->pairwise); |
2048 | int klen = wpa_cipher_key_len(sm->pairwise); | |
6fc6879b JM |
2049 | if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0, |
2050 | sm->PTK.tk1, klen)) { | |
2051 | wpa_sta_disconnect(sm->wpa_auth, sm->addr); | |
2052 | return; | |
2053 | } | |
2054 | /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */ | |
2055 | sm->pairwise_set = TRUE; | |
2056 | ||
581a8cde JM |
2057 | if (sm->wpa_auth->conf.wpa_ptk_rekey) { |
2058 | eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm); | |
2059 | eloop_register_timeout(sm->wpa_auth->conf. | |
2060 | wpa_ptk_rekey, 0, wpa_rekey_ptk, | |
2061 | sm->wpa_auth, sm); | |
2062 | } | |
2063 | ||
56586197 | 2064 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) { |
6fc6879b JM |
2065 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, |
2066 | WPA_EAPOL_authorized, 1); | |
2067 | } | |
2068 | } | |
2069 | ||
2070 | if (0 /* IBSS == TRUE */) { | |
2071 | sm->keycount++; | |
2072 | if (sm->keycount == 2) { | |
2073 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, | |
2074 | WPA_EAPOL_portValid, 1); | |
2075 | } | |
2076 | } else { | |
2077 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, | |
2078 | 1); | |
2079 | } | |
2080 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0); | |
2081 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1); | |
2082 | if (sm->wpa == WPA_VERSION_WPA) | |
2083 | sm->PInitAKeys = TRUE; | |
2084 | else | |
2085 | sm->has_GTK = TRUE; | |
2086 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO, | |
2087 | "pairwise key handshake completed (%s)", | |
2088 | sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN"); | |
2089 | ||
2090 | #ifdef CONFIG_IEEE80211R | |
2091 | wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr); | |
2092 | #endif /* CONFIG_IEEE80211R */ | |
2093 | } | |
2094 | ||
2095 | ||
2096 | SM_STEP(WPA_PTK) | |
2097 | { | |
2098 | struct wpa_authenticator *wpa_auth = sm->wpa_auth; | |
2099 | ||
2100 | if (sm->Init) | |
2101 | SM_ENTER(WPA_PTK, INITIALIZE); | |
2102 | else if (sm->Disconnect | |
1aae01fc BG |
2103 | /* || FIX: dot11RSNAConfigSALifetime timeout */) { |
2104 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
2105 | "WPA_PTK: sm->Disconnect"); | |
6fc6879b | 2106 | SM_ENTER(WPA_PTK, DISCONNECT); |
1aae01fc | 2107 | } |
6fc6879b JM |
2108 | else if (sm->DeauthenticationRequest) |
2109 | SM_ENTER(WPA_PTK, DISCONNECTED); | |
2110 | else if (sm->AuthenticationRequest) | |
2111 | SM_ENTER(WPA_PTK, AUTHENTICATION); | |
2112 | else if (sm->ReAuthenticationRequest) | |
2113 | SM_ENTER(WPA_PTK, AUTHENTICATION2); | |
2114 | else if (sm->PTKRequest) | |
2115 | SM_ENTER(WPA_PTK, PTKSTART); | |
2116 | else switch (sm->wpa_ptk_state) { | |
2117 | case WPA_PTK_INITIALIZE: | |
2118 | break; | |
2119 | case WPA_PTK_DISCONNECT: | |
2120 | SM_ENTER(WPA_PTK, DISCONNECTED); | |
2121 | break; | |
2122 | case WPA_PTK_DISCONNECTED: | |
2123 | SM_ENTER(WPA_PTK, INITIALIZE); | |
2124 | break; | |
2125 | case WPA_PTK_AUTHENTICATION: | |
2126 | SM_ENTER(WPA_PTK, AUTHENTICATION2); | |
2127 | break; | |
2128 | case WPA_PTK_AUTHENTICATION2: | |
56586197 | 2129 | if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) && |
6fc6879b JM |
2130 | wpa_auth_get_eapol(sm->wpa_auth, sm->addr, |
2131 | WPA_EAPOL_keyRun) > 0) | |
2132 | SM_ENTER(WPA_PTK, INITPMK); | |
56586197 | 2133 | else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) |
6fc6879b JM |
2134 | /* FIX: && 802.1X::keyRun */) |
2135 | SM_ENTER(WPA_PTK, INITPSK); | |
2136 | break; | |
2137 | case WPA_PTK_INITPMK: | |
2138 | if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr, | |
2139 | WPA_EAPOL_keyAvailable) > 0) | |
2140 | SM_ENTER(WPA_PTK, PTKSTART); | |
2141 | else { | |
2142 | wpa_auth->dot11RSNA4WayHandshakeFailures++; | |
1aae01fc BG |
2143 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO, |
2144 | "INITPMK - keyAvailable = false"); | |
6fc6879b JM |
2145 | SM_ENTER(WPA_PTK, DISCONNECT); |
2146 | } | |
2147 | break; | |
2148 | case WPA_PTK_INITPSK: | |
2149 | if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL)) | |
2150 | SM_ENTER(WPA_PTK, PTKSTART); | |
2151 | else { | |
2152 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO, | |
2153 | "no PSK configured for the STA"); | |
2154 | wpa_auth->dot11RSNA4WayHandshakeFailures++; | |
2155 | SM_ENTER(WPA_PTK, DISCONNECT); | |
2156 | } | |
2157 | break; | |
2158 | case WPA_PTK_PTKSTART: | |
2159 | if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest && | |
2160 | sm->EAPOLKeyPairwise) | |
2161 | SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING); | |
2162 | else if (sm->TimeoutCtr > | |
2163 | (int) dot11RSNAConfigPairwiseUpdateCount) { | |
2164 | wpa_auth->dot11RSNA4WayHandshakeFailures++; | |
1aae01fc BG |
2165 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, |
2166 | "PTKSTART: Retry limit %d reached", | |
2167 | dot11RSNAConfigPairwiseUpdateCount); | |
6fc6879b JM |
2168 | SM_ENTER(WPA_PTK, DISCONNECT); |
2169 | } else if (sm->TimeoutEvt) | |
2170 | SM_ENTER(WPA_PTK, PTKSTART); | |
2171 | break; | |
2172 | case WPA_PTK_PTKCALCNEGOTIATING: | |
2173 | if (sm->MICVerified) | |
2174 | SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2); | |
2175 | else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest && | |
2176 | sm->EAPOLKeyPairwise) | |
2177 | SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING); | |
2178 | else if (sm->TimeoutEvt) | |
2179 | SM_ENTER(WPA_PTK, PTKSTART); | |
2180 | break; | |
2181 | case WPA_PTK_PTKCALCNEGOTIATING2: | |
2182 | SM_ENTER(WPA_PTK, PTKINITNEGOTIATING); | |
2183 | break; | |
2184 | case WPA_PTK_PTKINITNEGOTIATING: | |
68921e24 JM |
2185 | if (sm->update_snonce) |
2186 | SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING); | |
2187 | else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest && | |
2188 | sm->EAPOLKeyPairwise && sm->MICVerified) | |
6fc6879b JM |
2189 | SM_ENTER(WPA_PTK, PTKINITDONE); |
2190 | else if (sm->TimeoutCtr > | |
2191 | (int) dot11RSNAConfigPairwiseUpdateCount) { | |
2192 | wpa_auth->dot11RSNA4WayHandshakeFailures++; | |
1aae01fc BG |
2193 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, |
2194 | "PTKINITNEGOTIATING: Retry limit %d " | |
2195 | "reached", | |
2196 | dot11RSNAConfigPairwiseUpdateCount); | |
6fc6879b JM |
2197 | SM_ENTER(WPA_PTK, DISCONNECT); |
2198 | } else if (sm->TimeoutEvt) | |
2199 | SM_ENTER(WPA_PTK, PTKINITNEGOTIATING); | |
2200 | break; | |
2201 | case WPA_PTK_PTKINITDONE: | |
2202 | break; | |
2203 | } | |
2204 | } | |
2205 | ||
2206 | ||
2207 | SM_STATE(WPA_PTK_GROUP, IDLE) | |
2208 | { | |
2209 | SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group); | |
2210 | if (sm->Init) { | |
2211 | /* Init flag is not cleared here, so avoid busy | |
2212 | * loop by claiming nothing changed. */ | |
2213 | sm->changed = FALSE; | |
2214 | } | |
2215 | sm->GTimeoutCtr = 0; | |
2216 | } | |
2217 | ||
2218 | ||
2219 | SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING) | |
2220 | { | |
2221 | u8 rsc[WPA_KEY_RSC_LEN]; | |
2222 | struct wpa_group *gsm = sm->group; | |
2223 | u8 *kde, *pos, hdr[2]; | |
2224 | size_t kde_len; | |
83421850 | 2225 | u8 *gtk, dummy_gtk[32]; |
6fc6879b JM |
2226 | |
2227 | SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group); | |
bae61562 JM |
2228 | |
2229 | sm->GTimeoutCtr++; | |
2230 | if (sm->GTimeoutCtr > (int) dot11RSNAConfigGroupUpdateCount) { | |
2231 | /* No point in sending the EAPOL-Key - we will disconnect | |
2232 | * immediately following this. */ | |
2233 | return; | |
2234 | } | |
2235 | ||
6fc6879b JM |
2236 | if (sm->wpa == WPA_VERSION_WPA) |
2237 | sm->PInitAKeys = FALSE; | |
2238 | sm->TimeoutEvt = FALSE; | |
2239 | /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */ | |
2240 | os_memset(rsc, 0, WPA_KEY_RSC_LEN); | |
2241 | if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE) | |
2242 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc); | |
2243 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
2244 | "sending 1/2 msg of Group Key Handshake"); | |
2245 | ||
83421850 JM |
2246 | gtk = gsm->GTK[gsm->GN - 1]; |
2247 | if (sm->wpa_auth->conf.disable_gtk) { | |
2248 | /* | |
2249 | * Provide unique random GTK to each STA to prevent use | |
2250 | * of GTK in the BSS. | |
2251 | */ | |
2252 | if (random_get_bytes(dummy_gtk, gsm->GTK_len) < 0) | |
2253 | return; | |
2254 | gtk = dummy_gtk; | |
2255 | } | |
6fc6879b JM |
2256 | if (sm->wpa == WPA_VERSION_WPA2) { |
2257 | kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len + | |
2258 | ieee80211w_kde_len(sm); | |
2259 | kde = os_malloc(kde_len); | |
2260 | if (kde == NULL) | |
2261 | return; | |
2262 | ||
2263 | pos = kde; | |
2264 | hdr[0] = gsm->GN & 0x03; | |
2265 | hdr[1] = 0; | |
2266 | pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2, | |
83421850 | 2267 | gtk, gsm->GTK_len); |
6fc6879b JM |
2268 | pos = ieee80211w_kde_add(sm, pos); |
2269 | } else { | |
83421850 | 2270 | kde = gtk; |
6fc6879b JM |
2271 | pos = kde + gsm->GTK_len; |
2272 | } | |
2273 | ||
2274 | wpa_send_eapol(sm->wpa_auth, sm, | |
2275 | WPA_KEY_INFO_SECURE | WPA_KEY_INFO_MIC | | |
2276 | WPA_KEY_INFO_ACK | | |
2277 | (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0), | |
2278 | rsc, gsm->GNonce, kde, pos - kde, gsm->GN, 1); | |
2279 | if (sm->wpa == WPA_VERSION_WPA2) | |
2280 | os_free(kde); | |
6fc6879b JM |
2281 | } |
2282 | ||
2283 | ||
2284 | SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED) | |
2285 | { | |
2286 | SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group); | |
2287 | sm->EAPOLKeyReceived = FALSE; | |
2288 | if (sm->GUpdateStationKeys) | |
2289 | sm->group->GKeyDoneStations--; | |
2290 | sm->GUpdateStationKeys = FALSE; | |
2291 | sm->GTimeoutCtr = 0; | |
2292 | /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */ | |
2293 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO, | |
2294 | "group key handshake completed (%s)", | |
2295 | sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN"); | |
2296 | sm->has_GTK = TRUE; | |
2297 | } | |
2298 | ||
2299 | ||
2300 | SM_STATE(WPA_PTK_GROUP, KEYERROR) | |
2301 | { | |
2302 | SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group); | |
2303 | if (sm->GUpdateStationKeys) | |
2304 | sm->group->GKeyDoneStations--; | |
2305 | sm->GUpdateStationKeys = FALSE; | |
2306 | sm->Disconnect = TRUE; | |
2307 | } | |
2308 | ||
2309 | ||
2310 | SM_STEP(WPA_PTK_GROUP) | |
2311 | { | |
9663596f | 2312 | if (sm->Init || sm->PtkGroupInit) { |
6fc6879b | 2313 | SM_ENTER(WPA_PTK_GROUP, IDLE); |
9663596f JM |
2314 | sm->PtkGroupInit = FALSE; |
2315 | } else switch (sm->wpa_ptk_group_state) { | |
6fc6879b JM |
2316 | case WPA_PTK_GROUP_IDLE: |
2317 | if (sm->GUpdateStationKeys || | |
2318 | (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys)) | |
2319 | SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING); | |
2320 | break; | |
2321 | case WPA_PTK_GROUP_REKEYNEGOTIATING: | |
2322 | if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest && | |
2323 | !sm->EAPOLKeyPairwise && sm->MICVerified) | |
2324 | SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED); | |
2325 | else if (sm->GTimeoutCtr > | |
2326 | (int) dot11RSNAConfigGroupUpdateCount) | |
2327 | SM_ENTER(WPA_PTK_GROUP, KEYERROR); | |
2328 | else if (sm->TimeoutEvt) | |
2329 | SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING); | |
2330 | break; | |
2331 | case WPA_PTK_GROUP_KEYERROR: | |
2332 | SM_ENTER(WPA_PTK_GROUP, IDLE); | |
2333 | break; | |
2334 | case WPA_PTK_GROUP_REKEYESTABLISHED: | |
2335 | SM_ENTER(WPA_PTK_GROUP, IDLE); | |
2336 | break; | |
2337 | } | |
2338 | } | |
2339 | ||
2340 | ||
2341 | static int wpa_gtk_update(struct wpa_authenticator *wpa_auth, | |
2342 | struct wpa_group *group) | |
2343 | { | |
2344 | int ret = 0; | |
2345 | ||
6fc6879b JM |
2346 | os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN); |
2347 | inc_byte_array(group->Counter, WPA_NONCE_LEN); | |
3c7302c2 JM |
2348 | if (wpa_gmk_to_gtk(group->GMK, "Group key expansion", |
2349 | wpa_auth->addr, group->GNonce, | |
2350 | group->GTK[group->GN - 1], group->GTK_len) < 0) | |
2351 | ret = -1; | |
5cb9d5c3 JM |
2352 | wpa_hexdump_key(MSG_DEBUG, "GTK", |
2353 | group->GTK[group->GN - 1], group->GTK_len); | |
6fc6879b JM |
2354 | |
2355 | #ifdef CONFIG_IEEE80211W | |
70f8cc8e | 2356 | if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) { |
5cb9d5c3 JM |
2357 | os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN); |
2358 | inc_byte_array(group->Counter, WPA_NONCE_LEN); | |
3c7302c2 JM |
2359 | if (wpa_gmk_to_gtk(group->GMK, "IGTK key expansion", |
2360 | wpa_auth->addr, group->GNonce, | |
2361 | group->IGTK[group->GN_igtk - 4], | |
2362 | WPA_IGTK_LEN) < 0) | |
2363 | ret = -1; | |
6fc6879b JM |
2364 | wpa_hexdump_key(MSG_DEBUG, "IGTK", |
2365 | group->IGTK[group->GN_igtk - 4], WPA_IGTK_LEN); | |
2366 | } | |
2367 | #endif /* CONFIG_IEEE80211W */ | |
2368 | ||
2369 | return ret; | |
2370 | } | |
2371 | ||
2372 | ||
2373 | static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth, | |
2374 | struct wpa_group *group) | |
2375 | { | |
2376 | wpa_printf(MSG_DEBUG, "WPA: group state machine entering state " | |
2377 | "GTK_INIT (VLAN-ID %d)", group->vlan_id); | |
2378 | group->changed = FALSE; /* GInit is not cleared here; avoid loop */ | |
2379 | group->wpa_group_state = WPA_GROUP_GTK_INIT; | |
2380 | ||
2381 | /* GTK[0..N] = 0 */ | |
2382 | os_memset(group->GTK, 0, sizeof(group->GTK)); | |
2383 | group->GN = 1; | |
2384 | group->GM = 2; | |
2385 | #ifdef CONFIG_IEEE80211W | |
2386 | group->GN_igtk = 4; | |
2387 | group->GM_igtk = 5; | |
2388 | #endif /* CONFIG_IEEE80211W */ | |
2389 | /* GTK[GN] = CalcGTK() */ | |
2390 | wpa_gtk_update(wpa_auth, group); | |
2391 | } | |
2392 | ||
2393 | ||
2394 | static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx) | |
2395 | { | |
473b6f22 MB |
2396 | if (ctx != NULL && ctx != sm->group) |
2397 | return 0; | |
2398 | ||
6fc6879b JM |
2399 | if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) { |
2400 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
2401 | "Not in PTKINITDONE; skip Group Key update"); | |
3c183894 | 2402 | sm->GUpdateStationKeys = FALSE; |
6fc6879b JM |
2403 | return 0; |
2404 | } | |
9663596f JM |
2405 | if (sm->GUpdateStationKeys) { |
2406 | /* | |
3c183894 JM |
2407 | * This should not really happen, so add a debug log entry. |
2408 | * Since we clear the GKeyDoneStations before the loop, the | |
2409 | * station needs to be counted here anyway. | |
9663596f JM |
2410 | */ |
2411 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
3c183894 JM |
2412 | "GUpdateStationKeys was already set when " |
2413 | "marking station for GTK rekeying"); | |
9663596f | 2414 | } |
3c183894 | 2415 | |
ad3872a3 | 2416 | /* Do not rekey GTK/IGTK when STA is in WNM-Sleep Mode */ |
d32d94db XC |
2417 | if (sm->is_wnmsleep) |
2418 | return 0; | |
d32d94db | 2419 | |
3c183894 JM |
2420 | sm->group->GKeyDoneStations++; |
2421 | sm->GUpdateStationKeys = TRUE; | |
2422 | ||
6fc6879b JM |
2423 | wpa_sm_step(sm); |
2424 | return 0; | |
2425 | } | |
2426 | ||
2427 | ||
ad3872a3 JM |
2428 | #ifdef CONFIG_WNM |
2429 | /* update GTK when exiting WNM-Sleep Mode */ | |
d32d94db XC |
2430 | void wpa_wnmsleep_rekey_gtk(struct wpa_state_machine *sm) |
2431 | { | |
2432 | if (sm->is_wnmsleep) | |
2433 | return; | |
2434 | ||
2435 | wpa_group_update_sta(sm, NULL); | |
2436 | } | |
2437 | ||
2438 | ||
2439 | void wpa_set_wnmsleep(struct wpa_state_machine *sm, int flag) | |
2440 | { | |
2441 | sm->is_wnmsleep = !!flag; | |
2442 | } | |
2443 | ||
2444 | ||
2445 | int wpa_wnmsleep_gtk_subelem(struct wpa_state_machine *sm, u8 *pos) | |
2446 | { | |
d32d94db | 2447 | struct wpa_group *gsm = sm->group; |
835822d4 | 2448 | u8 *start = pos; |
d32d94db XC |
2449 | |
2450 | /* | |
835822d4 | 2451 | * GTK subelement: |
d32d94db | 2452 | * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] | |
835822d4 | 2453 | * Key[5..32] |
d32d94db | 2454 | */ |
835822d4 JM |
2455 | *pos++ = WNM_SLEEP_SUBELEM_GTK; |
2456 | *pos++ = 11 + gsm->GTK_len; | |
d32d94db | 2457 | /* Key ID in B0-B1 of Key Info */ |
835822d4 JM |
2458 | WPA_PUT_LE16(pos, gsm->GN & 0x03); |
2459 | pos += 2; | |
2460 | *pos++ = gsm->GTK_len; | |
2461 | if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, pos) != 0) | |
d32d94db | 2462 | return 0; |
835822d4 JM |
2463 | pos += 8; |
2464 | os_memcpy(pos, gsm->GTK[gsm->GN - 1], gsm->GTK_len); | |
2465 | pos += gsm->GTK_len; | |
d32d94db | 2466 | |
835822d4 JM |
2467 | wpa_printf(MSG_DEBUG, "WNM: GTK Key ID %u in WNM-Sleep Mode exit", |
2468 | gsm->GN); | |
2469 | wpa_hexdump_key(MSG_DEBUG, "WNM: GTK in WNM-Sleep Mode exit", | |
d32d94db | 2470 | gsm->GTK[gsm->GN - 1], gsm->GTK_len); |
d32d94db | 2471 | |
835822d4 | 2472 | return pos - start; |
d32d94db XC |
2473 | } |
2474 | ||
2475 | ||
2476 | #ifdef CONFIG_IEEE80211W | |
2477 | int wpa_wnmsleep_igtk_subelem(struct wpa_state_machine *sm, u8 *pos) | |
2478 | { | |
d32d94db | 2479 | struct wpa_group *gsm = sm->group; |
835822d4 | 2480 | u8 *start = pos; |
d32d94db | 2481 | |
835822d4 JM |
2482 | /* |
2483 | * IGTK subelement: | |
2484 | * Sub-elem ID[1] | Length[1] | KeyID[2] | PN[6] | Key[16] | |
2485 | */ | |
2486 | *pos++ = WNM_SLEEP_SUBELEM_IGTK; | |
2487 | *pos++ = 2 + 6 + WPA_IGTK_LEN; | |
2488 | WPA_PUT_LE16(pos, gsm->GN_igtk); | |
2489 | pos += 2; | |
2490 | if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos) != 0) | |
d32d94db | 2491 | return 0; |
835822d4 | 2492 | pos += 6; |
d32d94db | 2493 | |
835822d4 JM |
2494 | os_memcpy(pos, gsm->IGTK[gsm->GN_igtk - 4], WPA_IGTK_LEN); |
2495 | pos += WPA_IGTK_LEN; | |
d32d94db | 2496 | |
835822d4 JM |
2497 | wpa_printf(MSG_DEBUG, "WNM: IGTK Key ID %u in WNM-Sleep Mode exit", |
2498 | gsm->GN_igtk); | |
2499 | wpa_hexdump_key(MSG_DEBUG, "WNM: IGTK in WNM-Sleep Mode exit", | |
d32d94db | 2500 | gsm->IGTK[gsm->GN_igtk - 4], WPA_IGTK_LEN); |
d32d94db | 2501 | |
835822d4 | 2502 | return pos - start; |
d32d94db XC |
2503 | } |
2504 | #endif /* CONFIG_IEEE80211W */ | |
ad3872a3 | 2505 | #endif /* CONFIG_WNM */ |
d32d94db XC |
2506 | |
2507 | ||
6fc6879b JM |
2508 | static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth, |
2509 | struct wpa_group *group) | |
2510 | { | |
2511 | int tmp; | |
2512 | ||
2513 | wpa_printf(MSG_DEBUG, "WPA: group state machine entering state " | |
2514 | "SETKEYS (VLAN-ID %d)", group->vlan_id); | |
2515 | group->changed = TRUE; | |
2516 | group->wpa_group_state = WPA_GROUP_SETKEYS; | |
2517 | group->GTKReKey = FALSE; | |
2518 | tmp = group->GM; | |
2519 | group->GM = group->GN; | |
2520 | group->GN = tmp; | |
2521 | #ifdef CONFIG_IEEE80211W | |
2522 | tmp = group->GM_igtk; | |
2523 | group->GM_igtk = group->GN_igtk; | |
2524 | group->GN_igtk = tmp; | |
2525 | #endif /* CONFIG_IEEE80211W */ | |
2526 | /* "GKeyDoneStations = GNoStations" is done in more robust way by | |
2527 | * counting the STAs that are marked with GUpdateStationKeys instead of | |
2528 | * including all STAs that could be in not-yet-completed state. */ | |
2529 | wpa_gtk_update(wpa_auth, group); | |
2530 | ||
3c183894 JM |
2531 | if (group->GKeyDoneStations) { |
2532 | wpa_printf(MSG_DEBUG, "wpa_group_setkeys: Unexpected " | |
2533 | "GKeyDoneStations=%d when starting new GTK rekey", | |
2534 | group->GKeyDoneStations); | |
2535 | group->GKeyDoneStations = 0; | |
2536 | } | |
473b6f22 | 2537 | wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, group); |
6fc6879b JM |
2538 | wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d", |
2539 | group->GKeyDoneStations); | |
2540 | } | |
2541 | ||
2542 | ||
1bdb7ab3 JM |
2543 | static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth, |
2544 | struct wpa_group *group) | |
6fc6879b | 2545 | { |
3c7302c2 JM |
2546 | int ret = 0; |
2547 | ||
3c7302c2 | 2548 | if (wpa_auth_set_key(wpa_auth, group->vlan_id, |
c3550295 | 2549 | wpa_cipher_to_alg(wpa_auth->conf.wpa_group), |
0382097e JM |
2550 | broadcast_ether_addr, group->GN, |
2551 | group->GTK[group->GN - 1], group->GTK_len) < 0) | |
3c7302c2 | 2552 | ret = -1; |
6fc6879b JM |
2553 | |
2554 | #ifdef CONFIG_IEEE80211W | |
3c7302c2 JM |
2555 | if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION && |
2556 | wpa_auth_set_key(wpa_auth, group->vlan_id, WPA_ALG_IGTK, | |
0382097e | 2557 | broadcast_ether_addr, group->GN_igtk, |
3c7302c2 JM |
2558 | group->IGTK[group->GN_igtk - 4], |
2559 | WPA_IGTK_LEN) < 0) | |
2560 | ret = -1; | |
6fc6879b | 2561 | #endif /* CONFIG_IEEE80211W */ |
3c7302c2 JM |
2562 | |
2563 | return ret; | |
6fc6879b JM |
2564 | } |
2565 | ||
2566 | ||
1bdb7ab3 JM |
2567 | static int wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth, |
2568 | struct wpa_group *group) | |
2569 | { | |
2570 | wpa_printf(MSG_DEBUG, "WPA: group state machine entering state " | |
2571 | "SETKEYSDONE (VLAN-ID %d)", group->vlan_id); | |
2572 | group->changed = TRUE; | |
2573 | group->wpa_group_state = WPA_GROUP_SETKEYSDONE; | |
2574 | ||
2575 | if (wpa_group_config_group_keys(wpa_auth, group) < 0) | |
2576 | return -1; | |
2577 | ||
2578 | return 0; | |
2579 | } | |
2580 | ||
2581 | ||
6fc6879b JM |
2582 | static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth, |
2583 | struct wpa_group *group) | |
2584 | { | |
2585 | if (group->GInit) { | |
2586 | wpa_group_gtk_init(wpa_auth, group); | |
2587 | } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT && | |
2588 | group->GTKAuthenticator) { | |
2589 | wpa_group_setkeysdone(wpa_auth, group); | |
2590 | } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE && | |
2591 | group->GTKReKey) { | |
2592 | wpa_group_setkeys(wpa_auth, group); | |
2593 | } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) { | |
2594 | if (group->GKeyDoneStations == 0) | |
2595 | wpa_group_setkeysdone(wpa_auth, group); | |
2596 | else if (group->GTKReKey) | |
2597 | wpa_group_setkeys(wpa_auth, group); | |
2598 | } | |
2599 | } | |
2600 | ||
2601 | ||
e4a6ea1d | 2602 | static int wpa_sm_step(struct wpa_state_machine *sm) |
6fc6879b JM |
2603 | { |
2604 | if (sm == NULL) | |
e4a6ea1d | 2605 | return 0; |
6fc6879b JM |
2606 | |
2607 | if (sm->in_step_loop) { | |
2608 | /* This should not happen, but if it does, make sure we do not | |
2609 | * end up freeing the state machine too early by exiting the | |
2610 | * recursive call. */ | |
2611 | wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively"); | |
e4a6ea1d | 2612 | return 0; |
6fc6879b JM |
2613 | } |
2614 | ||
2615 | sm->in_step_loop = 1; | |
2616 | do { | |
2617 | if (sm->pending_deinit) | |
2618 | break; | |
2619 | ||
2620 | sm->changed = FALSE; | |
2621 | sm->wpa_auth->group->changed = FALSE; | |
2622 | ||
2623 | SM_STEP_RUN(WPA_PTK); | |
2624 | if (sm->pending_deinit) | |
2625 | break; | |
2626 | SM_STEP_RUN(WPA_PTK_GROUP); | |
2627 | if (sm->pending_deinit) | |
2628 | break; | |
2629 | wpa_group_sm_step(sm->wpa_auth, sm->group); | |
2630 | } while (sm->changed || sm->wpa_auth->group->changed); | |
2631 | sm->in_step_loop = 0; | |
2632 | ||
2633 | if (sm->pending_deinit) { | |
2634 | wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state " | |
2635 | "machine deinit for " MACSTR, MAC2STR(sm->addr)); | |
2636 | wpa_free_sta_sm(sm); | |
e4a6ea1d | 2637 | return 1; |
6fc6879b | 2638 | } |
e4a6ea1d | 2639 | return 0; |
6fc6879b JM |
2640 | } |
2641 | ||
2642 | ||
2643 | static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx) | |
2644 | { | |
2645 | struct wpa_state_machine *sm = eloop_ctx; | |
2646 | wpa_sm_step(sm); | |
2647 | } | |
2648 | ||
2649 | ||
2650 | void wpa_auth_sm_notify(struct wpa_state_machine *sm) | |
2651 | { | |
2652 | if (sm == NULL) | |
2653 | return; | |
2654 | eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL); | |
2655 | } | |
2656 | ||
2657 | ||
2658 | void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth) | |
2659 | { | |
2660 | int tmp, i; | |
2661 | struct wpa_group *group; | |
2662 | ||
2663 | if (wpa_auth == NULL) | |
2664 | return; | |
2665 | ||
2666 | group = wpa_auth->group; | |
2667 | ||
2668 | for (i = 0; i < 2; i++) { | |
2669 | tmp = group->GM; | |
2670 | group->GM = group->GN; | |
2671 | group->GN = tmp; | |
2672 | #ifdef CONFIG_IEEE80211W | |
2673 | tmp = group->GM_igtk; | |
2674 | group->GM_igtk = group->GN_igtk; | |
2675 | group->GN_igtk = tmp; | |
2676 | #endif /* CONFIG_IEEE80211W */ | |
2677 | wpa_gtk_update(wpa_auth, group); | |
9354e594 | 2678 | wpa_group_config_group_keys(wpa_auth, group); |
6fc6879b JM |
2679 | } |
2680 | } | |
2681 | ||
2682 | ||
2683 | static const char * wpa_bool_txt(int bool) | |
2684 | { | |
2685 | return bool ? "TRUE" : "FALSE"; | |
2686 | } | |
2687 | ||
2688 | ||
6fc6879b JM |
2689 | #define RSN_SUITE "%02x-%02x-%02x-%d" |
2690 | #define RSN_SUITE_ARG(s) \ | |
2691 | ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff | |
2692 | ||
2693 | int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen) | |
2694 | { | |
2695 | int len = 0, ret; | |
2696 | char pmkid_txt[PMKID_LEN * 2 + 1]; | |
8ce58ceb IH |
2697 | #ifdef CONFIG_RSN_PREAUTH |
2698 | const int preauth = 1; | |
2699 | #else /* CONFIG_RSN_PREAUTH */ | |
2700 | const int preauth = 0; | |
2701 | #endif /* CONFIG_RSN_PREAUTH */ | |
6fc6879b JM |
2702 | |
2703 | if (wpa_auth == NULL) | |
2704 | return len; | |
2705 | ||
2706 | ret = os_snprintf(buf + len, buflen - len, | |
2707 | "dot11RSNAOptionImplemented=TRUE\n" | |
8ce58ceb | 2708 | "dot11RSNAPreauthenticationImplemented=%s\n" |
6fc6879b JM |
2709 | "dot11RSNAEnabled=%s\n" |
2710 | "dot11RSNAPreauthenticationEnabled=%s\n", | |
8ce58ceb | 2711 | wpa_bool_txt(preauth), |
6fc6879b JM |
2712 | wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN), |
2713 | wpa_bool_txt(wpa_auth->conf.rsn_preauth)); | |
2714 | if (ret < 0 || (size_t) ret >= buflen - len) | |
2715 | return len; | |
2716 | len += ret; | |
2717 | ||
2718 | wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt), | |
2719 | wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN); | |
2720 | ||
2721 | ret = os_snprintf( | |
2722 | buf + len, buflen - len, | |
2723 | "dot11RSNAConfigVersion=%u\n" | |
2724 | "dot11RSNAConfigPairwiseKeysSupported=9999\n" | |
2725 | /* FIX: dot11RSNAConfigGroupCipher */ | |
2726 | /* FIX: dot11RSNAConfigGroupRekeyMethod */ | |
2727 | /* FIX: dot11RSNAConfigGroupRekeyTime */ | |
2728 | /* FIX: dot11RSNAConfigGroupRekeyPackets */ | |
2729 | "dot11RSNAConfigGroupRekeyStrict=%u\n" | |
2730 | "dot11RSNAConfigGroupUpdateCount=%u\n" | |
2731 | "dot11RSNAConfigPairwiseUpdateCount=%u\n" | |
2732 | "dot11RSNAConfigGroupCipherSize=%u\n" | |
2733 | "dot11RSNAConfigPMKLifetime=%u\n" | |
2734 | "dot11RSNAConfigPMKReauthThreshold=%u\n" | |
2735 | "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n" | |
2736 | "dot11RSNAConfigSATimeout=%u\n" | |
2737 | "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n" | |
2738 | "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n" | |
2739 | "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n" | |
2740 | "dot11RSNAPMKIDUsed=%s\n" | |
2741 | "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n" | |
2742 | "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n" | |
2743 | "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n" | |
2744 | "dot11RSNATKIPCounterMeasuresInvoked=%u\n" | |
2745 | "dot11RSNA4WayHandshakeFailures=%u\n" | |
2746 | "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n", | |
2747 | RSN_VERSION, | |
2748 | !!wpa_auth->conf.wpa_strict_rekey, | |
2749 | dot11RSNAConfigGroupUpdateCount, | |
2750 | dot11RSNAConfigPairwiseUpdateCount, | |
c3550295 | 2751 | wpa_cipher_key_len(wpa_auth->conf.wpa_group) * 8, |
6fc6879b JM |
2752 | dot11RSNAConfigPMKLifetime, |
2753 | dot11RSNAConfigPMKReauthThreshold, | |
2754 | dot11RSNAConfigSATimeout, | |
2755 | RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected), | |
2756 | RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected), | |
2757 | RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected), | |
2758 | pmkid_txt, | |
2759 | RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested), | |
2760 | RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested), | |
2761 | RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested), | |
2762 | wpa_auth->dot11RSNATKIPCounterMeasuresInvoked, | |
2763 | wpa_auth->dot11RSNA4WayHandshakeFailures); | |
2764 | if (ret < 0 || (size_t) ret >= buflen - len) | |
2765 | return len; | |
2766 | len += ret; | |
2767 | ||
2768 | /* TODO: dot11RSNAConfigPairwiseCiphersTable */ | |
2769 | /* TODO: dot11RSNAConfigAuthenticationSuitesTable */ | |
2770 | ||
2771 | /* Private MIB */ | |
2772 | ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n", | |
2773 | wpa_auth->group->wpa_group_state); | |
2774 | if (ret < 0 || (size_t) ret >= buflen - len) | |
2775 | return len; | |
2776 | len += ret; | |
2777 | ||
2778 | return len; | |
2779 | } | |
2780 | ||
2781 | ||
2782 | int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen) | |
2783 | { | |
2784 | int len = 0, ret; | |
2785 | u32 pairwise = 0; | |
2786 | ||
2787 | if (sm == NULL) | |
2788 | return 0; | |
2789 | ||
2790 | /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */ | |
2791 | ||
2792 | /* dot11RSNAStatsEntry */ | |
2793 | ||
c3550295 JM |
2794 | pairwise = wpa_cipher_to_suite(sm->wpa == WPA_VERSION_WPA2 ? |
2795 | WPA_PROTO_RSN : WPA_PROTO_WPA, | |
2796 | sm->pairwise); | |
2797 | if (pairwise == 0) | |
6fc6879b JM |
2798 | return 0; |
2799 | ||
2800 | ret = os_snprintf( | |
2801 | buf + len, buflen - len, | |
2802 | /* TODO: dot11RSNAStatsIndex */ | |
2803 | "dot11RSNAStatsSTAAddress=" MACSTR "\n" | |
2804 | "dot11RSNAStatsVersion=1\n" | |
2805 | "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n" | |
2806 | /* TODO: dot11RSNAStatsTKIPICVErrors */ | |
2807 | "dot11RSNAStatsTKIPLocalMICFailures=%u\n" | |
d9040cdb | 2808 | "dot11RSNAStatsTKIPRemoteMICFailures=%u\n" |
6fc6879b JM |
2809 | /* TODO: dot11RSNAStatsCCMPReplays */ |
2810 | /* TODO: dot11RSNAStatsCCMPDecryptErrors */ | |
2811 | /* TODO: dot11RSNAStatsTKIPReplays */, | |
2812 | MAC2STR(sm->addr), | |
2813 | RSN_SUITE_ARG(pairwise), | |
2814 | sm->dot11RSNAStatsTKIPLocalMICFailures, | |
2815 | sm->dot11RSNAStatsTKIPRemoteMICFailures); | |
2816 | if (ret < 0 || (size_t) ret >= buflen - len) | |
2817 | return len; | |
2818 | len += ret; | |
2819 | ||
2820 | /* Private MIB */ | |
2821 | ret = os_snprintf(buf + len, buflen - len, | |
2822 | "hostapdWPAPTKState=%d\n" | |
2823 | "hostapdWPAPTKGroupState=%d\n", | |
2824 | sm->wpa_ptk_state, | |
2825 | sm->wpa_ptk_group_state); | |
2826 | if (ret < 0 || (size_t) ret >= buflen - len) | |
2827 | return len; | |
2828 | len += ret; | |
2829 | ||
2830 | return len; | |
2831 | } | |
2832 | ||
2833 | ||
2834 | void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth) | |
2835 | { | |
2836 | if (wpa_auth) | |
2837 | wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++; | |
2838 | } | |
2839 | ||
2840 | ||
2841 | int wpa_auth_pairwise_set(struct wpa_state_machine *sm) | |
2842 | { | |
2843 | return sm && sm->pairwise_set; | |
2844 | } | |
2845 | ||
2846 | ||
ff36ff00 JM |
2847 | int wpa_auth_get_pairwise(struct wpa_state_machine *sm) |
2848 | { | |
2849 | return sm->pairwise; | |
2850 | } | |
2851 | ||
2852 | ||
6fc6879b JM |
2853 | int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm) |
2854 | { | |
2855 | if (sm == NULL) | |
2856 | return -1; | |
2857 | return sm->wpa_key_mgmt; | |
2858 | } | |
2859 | ||
2860 | ||
2861 | int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm) | |
2862 | { | |
2863 | if (sm == NULL) | |
2864 | return 0; | |
2865 | return sm->wpa; | |
2866 | } | |
2867 | ||
2868 | ||
2869 | int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm, | |
2870 | struct rsn_pmksa_cache_entry *entry) | |
2871 | { | |
2872 | if (sm == NULL || sm->pmksa != entry) | |
2873 | return -1; | |
2874 | sm->pmksa = NULL; | |
2875 | return 0; | |
2876 | } | |
2877 | ||
2878 | ||
2879 | struct rsn_pmksa_cache_entry * | |
2880 | wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm) | |
2881 | { | |
2882 | return sm ? sm->pmksa : NULL; | |
2883 | } | |
2884 | ||
2885 | ||
2886 | void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm) | |
2887 | { | |
2888 | if (sm) | |
2889 | sm->dot11RSNAStatsTKIPLocalMICFailures++; | |
2890 | } | |
2891 | ||
2892 | ||
2893 | const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len) | |
2894 | { | |
2895 | if (wpa_auth == NULL) | |
2896 | return NULL; | |
2897 | *len = wpa_auth->wpa_ie_len; | |
2898 | return wpa_auth->wpa_ie; | |
2899 | } | |
2900 | ||
2901 | ||
2902 | int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk, | |
2903 | int session_timeout, struct eapol_state_machine *eapol) | |
2904 | { | |
cb465555 JM |
2905 | if (sm == NULL || sm->wpa != WPA_VERSION_WPA2 || |
2906 | sm->wpa_auth->conf.disable_pmksa_caching) | |
6fc6879b JM |
2907 | return -1; |
2908 | ||
4bb081f1 JM |
2909 | if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, PMK_LEN, |
2910 | sm->wpa_auth->addr, sm->addr, session_timeout, | |
2911 | eapol, sm->wpa_key_mgmt)) | |
6fc6879b JM |
2912 | return 0; |
2913 | ||
2914 | return -1; | |
2915 | } | |
2916 | ||
2917 | ||
2918 | int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth, | |
2919 | const u8 *pmk, size_t len, const u8 *sta_addr, | |
2920 | int session_timeout, | |
2921 | struct eapol_state_machine *eapol) | |
2922 | { | |
2923 | if (wpa_auth == NULL) | |
2924 | return -1; | |
2925 | ||
4bb081f1 JM |
2926 | if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len, wpa_auth->addr, |
2927 | sta_addr, session_timeout, eapol, | |
2928 | WPA_KEY_MGMT_IEEE8021X)) | |
6fc6879b JM |
2929 | return 0; |
2930 | ||
2931 | return -1; | |
2932 | } | |
2933 | ||
2934 | ||
2935 | static struct wpa_group * | |
2936 | wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id) | |
2937 | { | |
2938 | struct wpa_group *group; | |
2939 | ||
2940 | if (wpa_auth == NULL || wpa_auth->group == NULL) | |
2941 | return NULL; | |
2942 | ||
2943 | wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d", | |
2944 | vlan_id); | |
bdffdc5d | 2945 | group = wpa_group_init(wpa_auth, vlan_id, 0); |
6fc6879b JM |
2946 | if (group == NULL) |
2947 | return NULL; | |
2948 | ||
2949 | group->next = wpa_auth->group->next; | |
2950 | wpa_auth->group->next = group; | |
2951 | ||
2952 | return group; | |
2953 | } | |
2954 | ||
2955 | ||
2956 | int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id) | |
2957 | { | |
2958 | struct wpa_group *group; | |
2959 | ||
2960 | if (sm == NULL || sm->wpa_auth == NULL) | |
2961 | return 0; | |
2962 | ||
2963 | group = sm->wpa_auth->group; | |
2964 | while (group) { | |
2965 | if (group->vlan_id == vlan_id) | |
2966 | break; | |
2967 | group = group->next; | |
2968 | } | |
2969 | ||
2970 | if (group == NULL) { | |
2971 | group = wpa_auth_add_group(sm->wpa_auth, vlan_id); | |
2972 | if (group == NULL) | |
2973 | return -1; | |
2974 | } | |
2975 | ||
2976 | if (sm->group == group) | |
2977 | return 0; | |
2978 | ||
2979 | wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state " | |
2980 | "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id); | |
2981 | ||
2982 | sm->group = group; | |
2983 | return 0; | |
2984 | } | |
e4bf4db9 JM |
2985 | |
2986 | ||
2987 | void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth, | |
2988 | struct wpa_state_machine *sm, int ack) | |
2989 | { | |
2990 | if (wpa_auth == NULL || sm == NULL) | |
2991 | return; | |
2992 | wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key TX status for STA " MACSTR | |
2993 | " ack=%d", MAC2STR(sm->addr), ack); | |
2994 | if (sm->pending_1_of_4_timeout && ack) { | |
2995 | /* | |
2996 | * Some deployed supplicant implementations update their SNonce | |
2997 | * for each EAPOL-Key 2/4 message even within the same 4-way | |
2998 | * handshake and then fail to use the first SNonce when | |
2999 | * deriving the PTK. This results in unsuccessful 4-way | |
3000 | * handshake whenever the relatively short initial timeout is | |
3001 | * reached and EAPOL-Key 1/4 is retransmitted. Try to work | |
3002 | * around this by increasing the timeout now that we know that | |
3003 | * the station has received the frame. | |
3004 | */ | |
3005 | int timeout_ms = eapol_key_timeout_subseq; | |
3006 | wpa_printf(MSG_DEBUG, "WPA: Increase initial EAPOL-Key 1/4 " | |
3007 | "timeout by %u ms because of acknowledged frame", | |
3008 | timeout_ms); | |
3009 | eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm); | |
3010 | eloop_register_timeout(timeout_ms / 1000, | |
3011 | (timeout_ms % 1000) * 1000, | |
3012 | wpa_send_eapol_timeout, wpa_auth, sm); | |
3013 | } | |
3014 | } | |
c10347f2 JM |
3015 | |
3016 | ||
3017 | int wpa_auth_uses_sae(struct wpa_state_machine *sm) | |
3018 | { | |
3019 | if (sm == NULL) | |
3020 | return 0; | |
3021 | return wpa_key_mgmt_sae(sm->wpa_key_mgmt); | |
3022 | } |