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Commit | Line | Data |
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6fc6879b | 1 | /* |
00338a4f | 2 | * IEEE 802.11 RSN / WPA Authenticator |
98cd3d1c | 3 | * Copyright (c) 2004-2015, 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" | |
25ef8529 | 14 | #include "utils/bitfield.h" |
81f4f619 | 15 | #include "common/ieee802_11_defs.h" |
3b5b7aa8 | 16 | #include "crypto/aes.h" |
03da66bd | 17 | #include "crypto/aes_wrap.h" |
3b5b7aa8 | 18 | #include "crypto/aes_siv.h" |
03da66bd JM |
19 | #include "crypto/crypto.h" |
20 | #include "crypto/sha1.h" | |
21 | #include "crypto/sha256.h" | |
3642c431 | 22 | #include "crypto/random.h" |
281c950b | 23 | #include "eapol_auth/eapol_auth_sm.h" |
6226e38d | 24 | #include "ap_config.h" |
6fc6879b | 25 | #include "ieee802_11.h" |
6226e38d JM |
26 | #include "wpa_auth.h" |
27 | #include "pmksa_cache_auth.h" | |
6fc6879b JM |
28 | #include "wpa_auth_i.h" |
29 | #include "wpa_auth_ie.h" | |
30 | ||
31 | #define STATE_MACHINE_DATA struct wpa_state_machine | |
32 | #define STATE_MACHINE_DEBUG_PREFIX "WPA" | |
33 | #define STATE_MACHINE_ADDR sm->addr | |
34 | ||
35 | ||
36 | static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx); | |
e4a6ea1d | 37 | static int wpa_sm_step(struct wpa_state_machine *sm); |
929a2ea5 JM |
38 | static int wpa_verify_key_mic(int akmp, struct wpa_ptk *PTK, u8 *data, |
39 | size_t data_len); | |
75c8563e JM |
40 | #ifdef CONFIG_FILS |
41 | static int wpa_aead_decrypt(struct wpa_state_machine *sm, struct wpa_ptk *ptk, | |
42 | u8 *buf, size_t buf_len, u16 *_key_data_len); | |
43 | #endif /* CONFIG_FILS */ | |
6fc6879b JM |
44 | static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx); |
45 | static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth, | |
46 | struct wpa_group *group); | |
581a8cde | 47 | static void wpa_request_new_ptk(struct wpa_state_machine *sm); |
e6965d4e JM |
48 | static int wpa_gtk_update(struct wpa_authenticator *wpa_auth, |
49 | struct wpa_group *group); | |
1bdb7ab3 JM |
50 | static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth, |
51 | struct wpa_group *group); | |
f23c5b17 | 52 | static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce, |
207976f0 JM |
53 | const u8 *pmk, unsigned int pmk_len, |
54 | struct wpa_ptk *ptk); | |
a0ad9e8c MB |
55 | static void wpa_group_free(struct wpa_authenticator *wpa_auth, |
56 | struct wpa_group *group); | |
57 | static void wpa_group_get(struct wpa_authenticator *wpa_auth, | |
58 | struct wpa_group *group); | |
59 | static void wpa_group_put(struct wpa_authenticator *wpa_auth, | |
60 | struct wpa_group *group); | |
e73ffa09 | 61 | static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos); |
6fc6879b | 62 | |
bae61562 JM |
63 | static const u32 dot11RSNAConfigGroupUpdateCount = 4; |
64 | static const u32 dot11RSNAConfigPairwiseUpdateCount = 4; | |
65 | static const u32 eapol_key_timeout_first = 100; /* ms */ | |
66 | static const u32 eapol_key_timeout_subseq = 1000; /* ms */ | |
00338a4f | 67 | static const u32 eapol_key_timeout_first_group = 500; /* ms */ |
6fc6879b JM |
68 | |
69 | /* TODO: make these configurable */ | |
70 | static const int dot11RSNAConfigPMKLifetime = 43200; | |
71 | static const int dot11RSNAConfigPMKReauthThreshold = 70; | |
72 | static const int dot11RSNAConfigSATimeout = 60; | |
73 | ||
74 | ||
c772d054 | 75 | static inline int wpa_auth_mic_failure_report( |
6fc6879b JM |
76 | struct wpa_authenticator *wpa_auth, const u8 *addr) |
77 | { | |
78 | if (wpa_auth->cb.mic_failure_report) | |
c772d054 JM |
79 | return wpa_auth->cb.mic_failure_report(wpa_auth->cb.ctx, addr); |
80 | return 0; | |
6fc6879b JM |
81 | } |
82 | ||
83 | ||
2c502460 JM |
84 | static inline void wpa_auth_psk_failure_report( |
85 | struct wpa_authenticator *wpa_auth, const u8 *addr) | |
86 | { | |
87 | if (wpa_auth->cb.psk_failure_report) | |
88 | wpa_auth->cb.psk_failure_report(wpa_auth->cb.ctx, addr); | |
89 | } | |
90 | ||
91 | ||
6fc6879b JM |
92 | static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth, |
93 | const u8 *addr, wpa_eapol_variable var, | |
94 | int value) | |
95 | { | |
96 | if (wpa_auth->cb.set_eapol) | |
97 | wpa_auth->cb.set_eapol(wpa_auth->cb.ctx, addr, var, value); | |
98 | } | |
99 | ||
100 | ||
101 | static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth, | |
102 | const u8 *addr, wpa_eapol_variable var) | |
103 | { | |
104 | if (wpa_auth->cb.get_eapol == NULL) | |
105 | return -1; | |
106 | return wpa_auth->cb.get_eapol(wpa_auth->cb.ctx, addr, var); | |
107 | } | |
108 | ||
109 | ||
110 | static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth, | |
759fd76b JM |
111 | const u8 *addr, |
112 | const u8 *p2p_dev_addr, | |
113 | const u8 *prev_psk) | |
6fc6879b JM |
114 | { |
115 | if (wpa_auth->cb.get_psk == NULL) | |
116 | return NULL; | |
759fd76b JM |
117 | return wpa_auth->cb.get_psk(wpa_auth->cb.ctx, addr, p2p_dev_addr, |
118 | prev_psk); | |
6fc6879b JM |
119 | } |
120 | ||
121 | ||
122 | static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth, | |
123 | const u8 *addr, u8 *msk, size_t *len) | |
124 | { | |
125 | if (wpa_auth->cb.get_msk == NULL) | |
126 | return -1; | |
127 | return wpa_auth->cb.get_msk(wpa_auth->cb.ctx, addr, msk, len); | |
128 | } | |
129 | ||
130 | ||
131 | static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth, | |
132 | int vlan_id, | |
71934751 | 133 | enum wpa_alg alg, const u8 *addr, int idx, |
6fc6879b JM |
134 | u8 *key, size_t key_len) |
135 | { | |
136 | if (wpa_auth->cb.set_key == NULL) | |
137 | return -1; | |
138 | return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx, | |
139 | key, key_len); | |
140 | } | |
141 | ||
142 | ||
143 | static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth, | |
144 | const u8 *addr, int idx, u8 *seq) | |
145 | { | |
146 | if (wpa_auth->cb.get_seqnum == NULL) | |
147 | return -1; | |
148 | return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq); | |
149 | } | |
150 | ||
151 | ||
6fc6879b JM |
152 | static inline int |
153 | wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr, | |
154 | const u8 *data, size_t data_len, int encrypt) | |
155 | { | |
156 | if (wpa_auth->cb.send_eapol == NULL) | |
157 | return -1; | |
158 | return wpa_auth->cb.send_eapol(wpa_auth->cb.ctx, addr, data, data_len, | |
159 | encrypt); | |
160 | } | |
161 | ||
162 | ||
c50d94f1 BC |
163 | #ifdef CONFIG_MESH |
164 | static inline int wpa_auth_start_ampe(struct wpa_authenticator *wpa_auth, | |
165 | const u8 *addr) | |
166 | { | |
167 | if (wpa_auth->cb.start_ampe == NULL) | |
168 | return -1; | |
169 | return wpa_auth->cb.start_ampe(wpa_auth->cb.ctx, addr); | |
170 | } | |
171 | #endif /* CONFIG_MESH */ | |
172 | ||
173 | ||
6fc6879b JM |
174 | int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth, |
175 | int (*cb)(struct wpa_state_machine *sm, void *ctx), | |
176 | void *cb_ctx) | |
177 | { | |
178 | if (wpa_auth->cb.for_each_sta == NULL) | |
179 | return 0; | |
180 | return wpa_auth->cb.for_each_sta(wpa_auth->cb.ctx, cb, cb_ctx); | |
181 | } | |
182 | ||
183 | ||
bf98f7f3 JM |
184 | int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth, |
185 | int (*cb)(struct wpa_authenticator *a, void *ctx), | |
186 | void *cb_ctx) | |
187 | { | |
188 | if (wpa_auth->cb.for_each_auth == NULL) | |
189 | return 0; | |
190 | return wpa_auth->cb.for_each_auth(wpa_auth->cb.ctx, cb, cb_ctx); | |
191 | } | |
192 | ||
193 | ||
6fc6879b JM |
194 | void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr, |
195 | logger_level level, const char *txt) | |
196 | { | |
197 | if (wpa_auth->cb.logger == NULL) | |
198 | return; | |
199 | wpa_auth->cb.logger(wpa_auth->cb.ctx, addr, level, txt); | |
200 | } | |
201 | ||
202 | ||
203 | void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr, | |
204 | logger_level level, const char *fmt, ...) | |
205 | { | |
206 | char *format; | |
207 | int maxlen; | |
208 | va_list ap; | |
209 | ||
210 | if (wpa_auth->cb.logger == NULL) | |
211 | return; | |
212 | ||
213 | maxlen = os_strlen(fmt) + 100; | |
214 | format = os_malloc(maxlen); | |
215 | if (!format) | |
216 | return; | |
217 | ||
218 | va_start(ap, fmt); | |
219 | vsnprintf(format, maxlen, fmt, ap); | |
220 | va_end(ap); | |
221 | ||
222 | wpa_auth_logger(wpa_auth, addr, level, format); | |
223 | ||
224 | os_free(format); | |
225 | } | |
226 | ||
227 | ||
228 | static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth, | |
229 | const u8 *addr) | |
230 | { | |
231 | if (wpa_auth->cb.disconnect == NULL) | |
232 | return; | |
afcc9ea1 | 233 | wpa_printf(MSG_DEBUG, "wpa_sta_disconnect STA " MACSTR, MAC2STR(addr)); |
6fc6879b JM |
234 | wpa_auth->cb.disconnect(wpa_auth->cb.ctx, addr, |
235 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
236 | } | |
237 | ||
238 | ||
239 | static int wpa_use_aes_cmac(struct wpa_state_machine *sm) | |
240 | { | |
56586197 | 241 | int ret = 0; |
4ec1fd8e | 242 | #ifdef CONFIG_IEEE80211R_AP |
56586197 JM |
243 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) |
244 | ret = 1; | |
4ec1fd8e | 245 | #endif /* CONFIG_IEEE80211R_AP */ |
56586197 JM |
246 | #ifdef CONFIG_IEEE80211W |
247 | if (wpa_key_mgmt_sha256(sm->wpa_key_mgmt)) | |
248 | ret = 1; | |
249 | #endif /* CONFIG_IEEE80211W */ | |
a14896e8 JM |
250 | if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) |
251 | ret = 1; | |
56586197 | 252 | return ret; |
6fc6879b JM |
253 | } |
254 | ||
255 | ||
256 | static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx) | |
257 | { | |
258 | struct wpa_authenticator *wpa_auth = eloop_ctx; | |
259 | ||
3642c431 | 260 | if (random_get_bytes(wpa_auth->group->GMK, WPA_GMK_LEN)) { |
6fc6879b JM |
261 | wpa_printf(MSG_ERROR, "Failed to get random data for WPA " |
262 | "initialization."); | |
263 | } else { | |
264 | wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd"); | |
5cb9d5c3 JM |
265 | wpa_hexdump_key(MSG_DEBUG, "GMK", |
266 | wpa_auth->group->GMK, WPA_GMK_LEN); | |
6fc6879b JM |
267 | } |
268 | ||
269 | if (wpa_auth->conf.wpa_gmk_rekey) { | |
270 | eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0, | |
271 | wpa_rekey_gmk, wpa_auth, NULL); | |
272 | } | |
273 | } | |
274 | ||
275 | ||
276 | static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx) | |
277 | { | |
278 | struct wpa_authenticator *wpa_auth = eloop_ctx; | |
a0ad9e8c | 279 | struct wpa_group *group, *next; |
6fc6879b JM |
280 | |
281 | wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK"); | |
a0ad9e8c MB |
282 | group = wpa_auth->group; |
283 | while (group) { | |
284 | wpa_group_get(wpa_auth, group); | |
285 | ||
6fc6879b JM |
286 | group->GTKReKey = TRUE; |
287 | do { | |
288 | group->changed = FALSE; | |
289 | wpa_group_sm_step(wpa_auth, group); | |
290 | } while (group->changed); | |
a0ad9e8c MB |
291 | |
292 | next = group->next; | |
293 | wpa_group_put(wpa_auth, group); | |
294 | group = next; | |
6fc6879b JM |
295 | } |
296 | ||
297 | if (wpa_auth->conf.wpa_group_rekey) { | |
298 | eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, | |
299 | 0, wpa_rekey_gtk, wpa_auth, NULL); | |
300 | } | |
301 | } | |
302 | ||
303 | ||
581a8cde JM |
304 | static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx) |
305 | { | |
306 | struct wpa_authenticator *wpa_auth = eloop_ctx; | |
307 | struct wpa_state_machine *sm = timeout_ctx; | |
308 | ||
309 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK"); | |
310 | wpa_request_new_ptk(sm); | |
311 | wpa_sm_step(sm); | |
312 | } | |
313 | ||
314 | ||
6fc6879b JM |
315 | static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx) |
316 | { | |
317 | if (sm->pmksa == ctx) | |
318 | sm->pmksa = NULL; | |
319 | return 0; | |
320 | } | |
321 | ||
322 | ||
323 | static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry, | |
324 | void *ctx) | |
325 | { | |
326 | struct wpa_authenticator *wpa_auth = ctx; | |
327 | wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry); | |
328 | } | |
329 | ||
330 | ||
1bdb7ab3 JM |
331 | static int wpa_group_init_gmk_and_counter(struct wpa_authenticator *wpa_auth, |
332 | struct wpa_group *group) | |
333 | { | |
559cdabb | 334 | u8 buf[ETH_ALEN + 8 + sizeof(unsigned long)]; |
1bdb7ab3 | 335 | u8 rkey[32]; |
559cdabb | 336 | unsigned long ptr; |
1bdb7ab3 | 337 | |
3642c431 | 338 | if (random_get_bytes(group->GMK, WPA_GMK_LEN) < 0) |
1bdb7ab3 JM |
339 | return -1; |
340 | wpa_hexdump_key(MSG_DEBUG, "GMK", group->GMK, WPA_GMK_LEN); | |
341 | ||
342 | /* | |
343 | * Counter = PRF-256(Random number, "Init Counter", | |
344 | * Local MAC Address || Time) | |
345 | */ | |
346 | os_memcpy(buf, wpa_auth->addr, ETH_ALEN); | |
347 | wpa_get_ntp_timestamp(buf + ETH_ALEN); | |
559cdabb JM |
348 | ptr = (unsigned long) group; |
349 | os_memcpy(buf + ETH_ALEN + 8, &ptr, sizeof(ptr)); | |
3642c431 | 350 | if (random_get_bytes(rkey, sizeof(rkey)) < 0) |
1bdb7ab3 JM |
351 | return -1; |
352 | ||
353 | if (sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf), | |
354 | group->Counter, WPA_NONCE_LEN) < 0) | |
355 | return -1; | |
356 | wpa_hexdump_key(MSG_DEBUG, "Key Counter", | |
357 | group->Counter, WPA_NONCE_LEN); | |
358 | ||
359 | return 0; | |
360 | } | |
361 | ||
362 | ||
e6965d4e | 363 | static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth, |
bdffdc5d | 364 | int vlan_id, int delay_init) |
e6965d4e JM |
365 | { |
366 | struct wpa_group *group; | |
e6965d4e JM |
367 | |
368 | group = os_zalloc(sizeof(struct wpa_group)); | |
369 | if (group == NULL) | |
370 | return NULL; | |
371 | ||
372 | group->GTKAuthenticator = TRUE; | |
373 | group->vlan_id = vlan_id; | |
c3550295 | 374 | group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group); |
6fc6879b | 375 | |
08704cd8 JM |
376 | if (random_pool_ready() != 1) { |
377 | wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool " | |
378 | "for secure operations - update keys later when " | |
379 | "the first station connects"); | |
380 | } | |
381 | ||
1bdb7ab3 JM |
382 | /* |
383 | * Set initial GMK/Counter value here. The actual values that will be | |
384 | * used in negotiations will be set once the first station tries to | |
385 | * connect. This allows more time for collecting additional randomness | |
386 | * on embedded devices. | |
6fc6879b | 387 | */ |
1bdb7ab3 | 388 | if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0) { |
6fc6879b JM |
389 | wpa_printf(MSG_ERROR, "Failed to get random data for WPA " |
390 | "initialization."); | |
391 | os_free(group); | |
392 | return NULL; | |
393 | } | |
6fc6879b JM |
394 | |
395 | group->GInit = TRUE; | |
bdffdc5d JM |
396 | if (delay_init) { |
397 | wpa_printf(MSG_DEBUG, "WPA: Delay group state machine start " | |
398 | "until Beacon frames have been configured"); | |
399 | /* Initialization is completed in wpa_init_keys(). */ | |
400 | } else { | |
401 | wpa_group_sm_step(wpa_auth, group); | |
402 | group->GInit = FALSE; | |
403 | wpa_group_sm_step(wpa_auth, group); | |
404 | } | |
6fc6879b JM |
405 | |
406 | return group; | |
407 | } | |
408 | ||
409 | ||
410 | /** | |
411 | * wpa_init - Initialize WPA authenticator | |
412 | * @addr: Authenticator address | |
413 | * @conf: Configuration for WPA authenticator | |
a17df5fb | 414 | * @cb: Callback functions for WPA authenticator |
6fc6879b JM |
415 | * Returns: Pointer to WPA authenticator data or %NULL on failure |
416 | */ | |
417 | struct wpa_authenticator * wpa_init(const u8 *addr, | |
418 | struct wpa_auth_config *conf, | |
419 | struct wpa_auth_callbacks *cb) | |
420 | { | |
421 | struct wpa_authenticator *wpa_auth; | |
422 | ||
423 | wpa_auth = os_zalloc(sizeof(struct wpa_authenticator)); | |
424 | if (wpa_auth == NULL) | |
425 | return NULL; | |
426 | os_memcpy(wpa_auth->addr, addr, ETH_ALEN); | |
427 | os_memcpy(&wpa_auth->conf, conf, sizeof(*conf)); | |
428 | os_memcpy(&wpa_auth->cb, cb, sizeof(*cb)); | |
429 | ||
430 | if (wpa_auth_gen_wpa_ie(wpa_auth)) { | |
431 | wpa_printf(MSG_ERROR, "Could not generate WPA IE."); | |
432 | os_free(wpa_auth); | |
433 | return NULL; | |
434 | } | |
435 | ||
bdffdc5d | 436 | wpa_auth->group = wpa_group_init(wpa_auth, 0, 1); |
6fc6879b JM |
437 | if (wpa_auth->group == NULL) { |
438 | os_free(wpa_auth->wpa_ie); | |
439 | os_free(wpa_auth); | |
440 | return NULL; | |
441 | } | |
442 | ||
4bb081f1 JM |
443 | wpa_auth->pmksa = pmksa_cache_auth_init(wpa_auth_pmksa_free_cb, |
444 | wpa_auth); | |
6fc6879b JM |
445 | if (wpa_auth->pmksa == NULL) { |
446 | wpa_printf(MSG_ERROR, "PMKSA cache initialization failed."); | |
27d9701d | 447 | os_free(wpa_auth->group); |
6fc6879b JM |
448 | os_free(wpa_auth->wpa_ie); |
449 | os_free(wpa_auth); | |
450 | return NULL; | |
451 | } | |
452 | ||
4ec1fd8e | 453 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b JM |
454 | wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init(); |
455 | if (wpa_auth->ft_pmk_cache == NULL) { | |
456 | wpa_printf(MSG_ERROR, "FT PMK cache initialization failed."); | |
27d9701d | 457 | os_free(wpa_auth->group); |
6fc6879b | 458 | os_free(wpa_auth->wpa_ie); |
4bb081f1 | 459 | pmksa_cache_auth_deinit(wpa_auth->pmksa); |
6fc6879b JM |
460 | os_free(wpa_auth); |
461 | return NULL; | |
462 | } | |
4ec1fd8e | 463 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b JM |
464 | |
465 | if (wpa_auth->conf.wpa_gmk_rekey) { | |
466 | eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0, | |
467 | wpa_rekey_gmk, wpa_auth, NULL); | |
468 | } | |
469 | ||
470 | if (wpa_auth->conf.wpa_group_rekey) { | |
471 | eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0, | |
472 | wpa_rekey_gtk, wpa_auth, NULL); | |
473 | } | |
474 | ||
25ef8529 JM |
475 | #ifdef CONFIG_P2P |
476 | if (WPA_GET_BE32(conf->ip_addr_start)) { | |
477 | int count = WPA_GET_BE32(conf->ip_addr_end) - | |
478 | WPA_GET_BE32(conf->ip_addr_start) + 1; | |
479 | if (count > 1000) | |
480 | count = 1000; | |
481 | if (count > 0) | |
482 | wpa_auth->ip_pool = bitfield_alloc(count); | |
483 | } | |
484 | #endif /* CONFIG_P2P */ | |
485 | ||
6fc6879b JM |
486 | return wpa_auth; |
487 | } | |
488 | ||
489 | ||
bdffdc5d JM |
490 | int wpa_init_keys(struct wpa_authenticator *wpa_auth) |
491 | { | |
492 | struct wpa_group *group = wpa_auth->group; | |
493 | ||
494 | wpa_printf(MSG_DEBUG, "WPA: Start group state machine to set initial " | |
495 | "keys"); | |
496 | wpa_group_sm_step(wpa_auth, group); | |
497 | group->GInit = FALSE; | |
498 | wpa_group_sm_step(wpa_auth, group); | |
7d7f7be2 JM |
499 | if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) |
500 | return -1; | |
bdffdc5d JM |
501 | return 0; |
502 | } | |
503 | ||
504 | ||
6fc6879b JM |
505 | /** |
506 | * wpa_deinit - Deinitialize WPA authenticator | |
507 | * @wpa_auth: Pointer to WPA authenticator data from wpa_init() | |
508 | */ | |
509 | void wpa_deinit(struct wpa_authenticator *wpa_auth) | |
510 | { | |
511 | struct wpa_group *group, *prev; | |
512 | ||
513 | eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL); | |
514 | eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL); | |
515 | ||
516 | #ifdef CONFIG_PEERKEY | |
517 | while (wpa_auth->stsl_negotiations) | |
518 | wpa_stsl_remove(wpa_auth, wpa_auth->stsl_negotiations); | |
519 | #endif /* CONFIG_PEERKEY */ | |
520 | ||
4bb081f1 | 521 | pmksa_cache_auth_deinit(wpa_auth->pmksa); |
6fc6879b | 522 | |
4ec1fd8e | 523 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b JM |
524 | wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache); |
525 | wpa_auth->ft_pmk_cache = NULL; | |
4ec1fd8e | 526 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b | 527 | |
25ef8529 JM |
528 | #ifdef CONFIG_P2P |
529 | bitfield_free(wpa_auth->ip_pool); | |
530 | #endif /* CONFIG_P2P */ | |
531 | ||
532 | ||
6fc6879b JM |
533 | os_free(wpa_auth->wpa_ie); |
534 | ||
535 | group = wpa_auth->group; | |
536 | while (group) { | |
537 | prev = group; | |
538 | group = group->next; | |
539 | os_free(prev); | |
540 | } | |
541 | ||
542 | os_free(wpa_auth); | |
543 | } | |
544 | ||
545 | ||
546 | /** | |
547 | * wpa_reconfig - Update WPA authenticator configuration | |
548 | * @wpa_auth: Pointer to WPA authenticator data from wpa_init() | |
549 | * @conf: Configuration for WPA authenticator | |
550 | */ | |
551 | int wpa_reconfig(struct wpa_authenticator *wpa_auth, | |
552 | struct wpa_auth_config *conf) | |
553 | { | |
e6965d4e | 554 | struct wpa_group *group; |
6fc6879b JM |
555 | if (wpa_auth == NULL) |
556 | return 0; | |
557 | ||
558 | os_memcpy(&wpa_auth->conf, conf, sizeof(*conf)); | |
ad08c363 JM |
559 | if (wpa_auth_gen_wpa_ie(wpa_auth)) { |
560 | wpa_printf(MSG_ERROR, "Could not generate WPA IE."); | |
561 | return -1; | |
562 | } | |
563 | ||
e6965d4e JM |
564 | /* |
565 | * Reinitialize GTK to make sure it is suitable for the new | |
566 | * configuration. | |
567 | */ | |
568 | group = wpa_auth->group; | |
c3550295 | 569 | group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group); |
e6965d4e JM |
570 | group->GInit = TRUE; |
571 | wpa_group_sm_step(wpa_auth, group); | |
572 | group->GInit = FALSE; | |
573 | wpa_group_sm_step(wpa_auth, group); | |
574 | ||
6fc6879b JM |
575 | return 0; |
576 | } | |
577 | ||
578 | ||
579 | struct wpa_state_machine * | |
94ddef3e JM |
580 | wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr, |
581 | const u8 *p2p_dev_addr) | |
6fc6879b JM |
582 | { |
583 | struct wpa_state_machine *sm; | |
584 | ||
7d7f7be2 JM |
585 | if (wpa_auth->group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) |
586 | return NULL; | |
587 | ||
6fc6879b JM |
588 | sm = os_zalloc(sizeof(struct wpa_state_machine)); |
589 | if (sm == NULL) | |
590 | return NULL; | |
591 | os_memcpy(sm->addr, addr, ETH_ALEN); | |
94ddef3e JM |
592 | if (p2p_dev_addr) |
593 | os_memcpy(sm->p2p_dev_addr, p2p_dev_addr, ETH_ALEN); | |
6fc6879b JM |
594 | |
595 | sm->wpa_auth = wpa_auth; | |
596 | sm->group = wpa_auth->group; | |
a0ad9e8c | 597 | wpa_group_get(sm->wpa_auth, sm->group); |
6fc6879b JM |
598 | |
599 | return sm; | |
600 | } | |
601 | ||
602 | ||
6f9b5d16 JM |
603 | int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth, |
604 | struct wpa_state_machine *sm) | |
6fc6879b JM |
605 | { |
606 | if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL) | |
6f9b5d16 | 607 | return -1; |
6fc6879b | 608 | |
4ec1fd8e | 609 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b JM |
610 | if (sm->ft_completed) { |
611 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
612 | "FT authentication already completed - do not " | |
613 | "start 4-way handshake"); | |
3d4d2348 JM |
614 | /* Go to PTKINITDONE state to allow GTK rekeying */ |
615 | sm->wpa_ptk_state = WPA_PTK_PTKINITDONE; | |
6f9b5d16 | 616 | return 0; |
6fc6879b | 617 | } |
4ec1fd8e | 618 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b | 619 | |
07e0117d JM |
620 | #ifdef CONFIG_FILS |
621 | if (sm->fils_completed) { | |
622 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
623 | "FILS authentication already completed - do not start 4-way handshake"); | |
624 | /* Go to PTKINITDONE state to allow GTK rekeying */ | |
625 | sm->wpa_ptk_state = WPA_PTK_PTKINITDONE; | |
626 | return 0; | |
627 | } | |
628 | #endif /* CONFIG_FILS */ | |
629 | ||
6fc6879b | 630 | if (sm->started) { |
22a299ee | 631 | os_memset(&sm->key_replay, 0, sizeof(sm->key_replay)); |
6fc6879b | 632 | sm->ReAuthenticationRequest = TRUE; |
6f9b5d16 | 633 | return wpa_sm_step(sm); |
6fc6879b JM |
634 | } |
635 | ||
636 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
637 | "start authentication"); | |
638 | sm->started = 1; | |
639 | ||
640 | sm->Init = TRUE; | |
e4a6ea1d | 641 | if (wpa_sm_step(sm) == 1) |
6f9b5d16 | 642 | return 1; /* should not really happen */ |
6fc6879b JM |
643 | sm->Init = FALSE; |
644 | sm->AuthenticationRequest = TRUE; | |
6f9b5d16 | 645 | return wpa_sm_step(sm); |
6fc6879b JM |
646 | } |
647 | ||
648 | ||
a8d05fca JM |
649 | void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm) |
650 | { | |
651 | /* WPA/RSN was not used - clear WPA state. This is needed if the STA | |
652 | * reassociates back to the same AP while the previous entry for the | |
653 | * STA has not yet been removed. */ | |
654 | if (sm == NULL) | |
655 | return; | |
656 | ||
657 | sm->wpa_key_mgmt = 0; | |
658 | } | |
659 | ||
660 | ||
6fc6879b JM |
661 | static void wpa_free_sta_sm(struct wpa_state_machine *sm) |
662 | { | |
25ef8529 JM |
663 | #ifdef CONFIG_P2P |
664 | if (WPA_GET_BE32(sm->ip_addr)) { | |
665 | u32 start; | |
666 | wpa_printf(MSG_DEBUG, "P2P: Free assigned IP " | |
667 | "address %u.%u.%u.%u from " MACSTR, | |
668 | sm->ip_addr[0], sm->ip_addr[1], | |
669 | sm->ip_addr[2], sm->ip_addr[3], | |
670 | MAC2STR(sm->addr)); | |
671 | start = WPA_GET_BE32(sm->wpa_auth->conf.ip_addr_start); | |
672 | bitfield_clear(sm->wpa_auth->ip_pool, | |
673 | WPA_GET_BE32(sm->ip_addr) - start); | |
674 | } | |
675 | #endif /* CONFIG_P2P */ | |
2ade8ef2 JM |
676 | if (sm->GUpdateStationKeys) { |
677 | sm->group->GKeyDoneStations--; | |
678 | sm->GUpdateStationKeys = FALSE; | |
679 | } | |
4ec1fd8e | 680 | #ifdef CONFIG_IEEE80211R_AP |
0f857f43 | 681 | os_free(sm->assoc_resp_ftie); |
692ec305 | 682 | wpabuf_free(sm->ft_pending_req_ies); |
4ec1fd8e | 683 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b JM |
684 | os_free(sm->last_rx_eapol_key); |
685 | os_free(sm->wpa_ie); | |
a0ad9e8c | 686 | wpa_group_put(sm->wpa_auth, sm->group); |
6fc6879b JM |
687 | os_free(sm); |
688 | } | |
689 | ||
690 | ||
691 | void wpa_auth_sta_deinit(struct wpa_state_machine *sm) | |
692 | { | |
693 | if (sm == NULL) | |
694 | return; | |
695 | ||
696 | if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) { | |
697 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
698 | "strict rekeying - force GTK rekey since STA " | |
699 | "is leaving"); | |
700 | eloop_cancel_timeout(wpa_rekey_gtk, sm->wpa_auth, NULL); | |
701 | eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth, | |
702 | NULL); | |
703 | } | |
704 | ||
705 | eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm); | |
e4bf4db9 | 706 | sm->pending_1_of_4_timeout = 0; |
6fc6879b | 707 | eloop_cancel_timeout(wpa_sm_call_step, sm, NULL); |
581a8cde | 708 | eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm); |
6fc6879b JM |
709 | if (sm->in_step_loop) { |
710 | /* Must not free state machine while wpa_sm_step() is running. | |
711 | * Freeing will be completed in the end of wpa_sm_step(). */ | |
712 | wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state " | |
713 | "machine deinit for " MACSTR, MAC2STR(sm->addr)); | |
714 | sm->pending_deinit = 1; | |
715 | } else | |
716 | wpa_free_sta_sm(sm); | |
717 | } | |
718 | ||
719 | ||
720 | static void wpa_request_new_ptk(struct wpa_state_machine *sm) | |
721 | { | |
722 | if (sm == NULL) | |
723 | return; | |
724 | ||
725 | sm->PTKRequest = TRUE; | |
726 | sm->PTK_valid = 0; | |
727 | } | |
728 | ||
729 | ||
68921e24 | 730 | static int wpa_replay_counter_valid(struct wpa_key_replay_counter *ctr, |
22a299ee JM |
731 | const u8 *replay_counter) |
732 | { | |
733 | int i; | |
734 | for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) { | |
68921e24 | 735 | if (!ctr[i].valid) |
22a299ee | 736 | break; |
68921e24 | 737 | if (os_memcmp(replay_counter, ctr[i].counter, |
22a299ee JM |
738 | WPA_REPLAY_COUNTER_LEN) == 0) |
739 | return 1; | |
740 | } | |
741 | return 0; | |
742 | } | |
743 | ||
744 | ||
68921e24 JM |
745 | static void wpa_replay_counter_mark_invalid(struct wpa_key_replay_counter *ctr, |
746 | const u8 *replay_counter) | |
747 | { | |
748 | int i; | |
749 | for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) { | |
750 | if (ctr[i].valid && | |
751 | (replay_counter == NULL || | |
752 | os_memcmp(replay_counter, ctr[i].counter, | |
753 | WPA_REPLAY_COUNTER_LEN) == 0)) | |
754 | ctr[i].valid = FALSE; | |
755 | } | |
756 | } | |
757 | ||
758 | ||
4ec1fd8e | 759 | #ifdef CONFIG_IEEE80211R_AP |
0f857f43 JM |
760 | static int ft_check_msg_2_of_4(struct wpa_authenticator *wpa_auth, |
761 | struct wpa_state_machine *sm, | |
762 | struct wpa_eapol_ie_parse *kde) | |
763 | { | |
764 | struct wpa_ie_data ie; | |
765 | struct rsn_mdie *mdie; | |
766 | ||
767 | if (wpa_parse_wpa_ie_rsn(kde->rsn_ie, kde->rsn_ie_len, &ie) < 0 || | |
768 | ie.num_pmkid != 1 || ie.pmkid == NULL) { | |
769 | wpa_printf(MSG_DEBUG, "FT: No PMKR1Name in " | |
770 | "FT 4-way handshake message 2/4"); | |
771 | return -1; | |
772 | } | |
773 | ||
774 | os_memcpy(sm->sup_pmk_r1_name, ie.pmkid, PMKID_LEN); | |
775 | wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Supplicant", | |
776 | sm->sup_pmk_r1_name, PMKID_LEN); | |
777 | ||
778 | if (!kde->mdie || !kde->ftie) { | |
779 | wpa_printf(MSG_DEBUG, "FT: No %s in FT 4-way handshake " | |
780 | "message 2/4", kde->mdie ? "FTIE" : "MDIE"); | |
781 | return -1; | |
782 | } | |
783 | ||
784 | mdie = (struct rsn_mdie *) (kde->mdie + 2); | |
785 | if (kde->mdie[1] < sizeof(struct rsn_mdie) || | |
786 | os_memcmp(wpa_auth->conf.mobility_domain, mdie->mobility_domain, | |
787 | MOBILITY_DOMAIN_ID_LEN) != 0) { | |
788 | wpa_printf(MSG_DEBUG, "FT: MDIE mismatch"); | |
789 | return -1; | |
790 | } | |
791 | ||
792 | if (sm->assoc_resp_ftie && | |
793 | (kde->ftie[1] != sm->assoc_resp_ftie[1] || | |
794 | os_memcmp(kde->ftie, sm->assoc_resp_ftie, | |
795 | 2 + sm->assoc_resp_ftie[1]) != 0)) { | |
796 | wpa_printf(MSG_DEBUG, "FT: FTIE mismatch"); | |
797 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 2/4", | |
798 | kde->ftie, kde->ftie_len); | |
799 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)AssocResp", | |
800 | sm->assoc_resp_ftie, 2 + sm->assoc_resp_ftie[1]); | |
801 | return -1; | |
802 | } | |
803 | ||
804 | return 0; | |
805 | } | |
4ec1fd8e | 806 | #endif /* CONFIG_IEEE80211R_AP */ |
0f857f43 JM |
807 | |
808 | ||
c772d054 JM |
809 | static int wpa_receive_error_report(struct wpa_authenticator *wpa_auth, |
810 | struct wpa_state_machine *sm, int group) | |
ec027805 JM |
811 | { |
812 | /* Supplicant reported a Michael MIC error */ | |
813 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
814 | "received EAPOL-Key Error Request " | |
815 | "(STA detected Michael MIC failure (group=%d))", | |
816 | group); | |
fbc72d32 JM |
817 | |
818 | if (group && wpa_auth->conf.wpa_group != WPA_CIPHER_TKIP) { | |
819 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
820 | "ignore Michael MIC failure report since " | |
821 | "group cipher is not TKIP"); | |
822 | } else if (!group && sm->pairwise != WPA_CIPHER_TKIP) { | |
823 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
824 | "ignore Michael MIC failure report since " | |
825 | "pairwise cipher is not TKIP"); | |
826 | } else { | |
c772d054 JM |
827 | if (wpa_auth_mic_failure_report(wpa_auth, sm->addr) > 0) |
828 | return 1; /* STA entry was removed */ | |
fbc72d32 JM |
829 | sm->dot11RSNAStatsTKIPRemoteMICFailures++; |
830 | wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++; | |
831 | } | |
ec027805 JM |
832 | |
833 | /* | |
834 | * Error report is not a request for a new key handshake, but since | |
835 | * Authenticator may do it, let's change the keys now anyway. | |
836 | */ | |
837 | wpa_request_new_ptk(sm); | |
c772d054 | 838 | return 0; |
ec027805 JM |
839 | } |
840 | ||
841 | ||
f23c5b17 JM |
842 | static int wpa_try_alt_snonce(struct wpa_state_machine *sm, u8 *data, |
843 | size_t data_len) | |
844 | { | |
845 | struct wpa_ptk PTK; | |
846 | int ok = 0; | |
847 | const u8 *pmk = NULL; | |
207976f0 | 848 | unsigned int pmk_len; |
f23c5b17 | 849 | |
b729fd8d | 850 | os_memset(&PTK, 0, sizeof(PTK)); |
f23c5b17 JM |
851 | for (;;) { |
852 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) { | |
853 | pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, | |
854 | sm->p2p_dev_addr, pmk); | |
855 | if (pmk == NULL) | |
856 | break; | |
207976f0 JM |
857 | pmk_len = PMK_LEN; |
858 | } else { | |
f23c5b17 | 859 | pmk = sm->PMK; |
207976f0 JM |
860 | pmk_len = sm->pmk_len; |
861 | } | |
f23c5b17 | 862 | |
207976f0 | 863 | wpa_derive_ptk(sm, sm->alt_SNonce, pmk, pmk_len, &PTK); |
f23c5b17 JM |
864 | |
865 | if (wpa_verify_key_mic(sm->wpa_key_mgmt, &PTK, data, data_len) | |
866 | == 0) { | |
867 | ok = 1; | |
868 | break; | |
869 | } | |
870 | ||
871 | if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) | |
872 | break; | |
873 | } | |
874 | ||
875 | if (!ok) { | |
876 | wpa_printf(MSG_DEBUG, | |
877 | "WPA: Earlier SNonce did not result in matching MIC"); | |
878 | return -1; | |
879 | } | |
880 | ||
881 | wpa_printf(MSG_DEBUG, | |
882 | "WPA: Earlier SNonce resulted in matching MIC"); | |
883 | sm->alt_snonce_valid = 0; | |
884 | os_memcpy(sm->SNonce, sm->alt_SNonce, WPA_NONCE_LEN); | |
885 | os_memcpy(&sm->PTK, &PTK, sizeof(PTK)); | |
886 | sm->PTK_valid = TRUE; | |
887 | ||
888 | return 0; | |
889 | } | |
890 | ||
891 | ||
6fc6879b JM |
892 | void wpa_receive(struct wpa_authenticator *wpa_auth, |
893 | struct wpa_state_machine *sm, | |
894 | u8 *data, size_t data_len) | |
895 | { | |
896 | struct ieee802_1x_hdr *hdr; | |
897 | struct wpa_eapol_key *key; | |
898 | u16 key_info, key_data_length; | |
899 | enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST, | |
900 | SMK_M1, SMK_M3, SMK_ERROR } msg; | |
901 | char *msgtxt; | |
902 | struct wpa_eapol_ie_parse kde; | |
3b5b7aa8 JM |
903 | const u8 *key_data; |
904 | size_t keyhdrlen, mic_len; | |
6d014ffc | 905 | u8 *mic; |
6fc6879b JM |
906 | |
907 | if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL) | |
908 | return; | |
dc5bad48 | 909 | wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL data", data, data_len); |
6fc6879b | 910 | |
5e3b5197 | 911 | mic_len = wpa_mic_len(sm->wpa_key_mgmt); |
6d014ffc | 912 | keyhdrlen = sizeof(*key) + mic_len + 2; |
5e3b5197 | 913 | |
dc5bad48 JM |
914 | if (data_len < sizeof(*hdr) + keyhdrlen) { |
915 | wpa_printf(MSG_DEBUG, "WPA: Ignore too short EAPOL-Key frame"); | |
6fc6879b | 916 | return; |
dc5bad48 | 917 | } |
6fc6879b JM |
918 | |
919 | hdr = (struct ieee802_1x_hdr *) data; | |
920 | key = (struct wpa_eapol_key *) (hdr + 1); | |
6d014ffc | 921 | mic = (u8 *) (key + 1); |
6fc6879b | 922 | key_info = WPA_GET_BE16(key->key_info); |
6d014ffc JM |
923 | key_data = mic + mic_len + 2; |
924 | key_data_length = WPA_GET_BE16(mic + mic_len); | |
0d442aff | 925 | wpa_printf(MSG_DEBUG, "WPA: Received EAPOL-Key from " MACSTR |
dc5bad48 JM |
926 | " key_info=0x%x type=%u mic_len=%u key_data_length=%u", |
927 | MAC2STR(sm->addr), key_info, key->type, | |
928 | (unsigned int) mic_len, key_data_length); | |
929 | wpa_hexdump(MSG_MSGDUMP, | |
930 | "WPA: EAPOL-Key header (ending before Key MIC)", | |
931 | key, sizeof(*key)); | |
932 | wpa_hexdump(MSG_MSGDUMP, "WPA: EAPOL-Key Key MIC", | |
933 | mic, mic_len); | |
5e3b5197 | 934 | if (key_data_length > data_len - sizeof(*hdr) - keyhdrlen) { |
6fc6879b JM |
935 | wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - " |
936 | "key_data overflow (%d > %lu)", | |
937 | key_data_length, | |
938 | (unsigned long) (data_len - sizeof(*hdr) - | |
5e3b5197 | 939 | keyhdrlen)); |
6fc6879b JM |
940 | return; |
941 | } | |
942 | ||
f8e96eb6 | 943 | if (sm->wpa == WPA_VERSION_WPA2) { |
74590e71 JM |
944 | if (key->type == EAPOL_KEY_TYPE_WPA) { |
945 | /* | |
946 | * Some deployed station implementations seem to send | |
947 | * msg 4/4 with incorrect type value in WPA2 mode. | |
948 | */ | |
949 | wpa_printf(MSG_DEBUG, "Workaround: Allow EAPOL-Key " | |
950 | "with unexpected WPA type in RSN mode"); | |
951 | } else if (key->type != EAPOL_KEY_TYPE_RSN) { | |
f8e96eb6 JM |
952 | wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with " |
953 | "unexpected type %d in RSN mode", | |
954 | key->type); | |
955 | return; | |
956 | } | |
957 | } else { | |
958 | if (key->type != EAPOL_KEY_TYPE_WPA) { | |
959 | wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with " | |
960 | "unexpected type %d in WPA mode", | |
961 | key->type); | |
962 | return; | |
963 | } | |
964 | } | |
965 | ||
bc8318ac JM |
966 | wpa_hexdump(MSG_DEBUG, "WPA: Received Key Nonce", key->key_nonce, |
967 | WPA_NONCE_LEN); | |
968 | wpa_hexdump(MSG_DEBUG, "WPA: Received Replay Counter", | |
969 | key->replay_counter, WPA_REPLAY_COUNTER_LEN); | |
970 | ||
6fc6879b JM |
971 | /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys |
972 | * are set */ | |
973 | ||
974 | if ((key_info & (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) == | |
975 | (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) { | |
976 | if (key_info & WPA_KEY_INFO_ERROR) { | |
977 | msg = SMK_ERROR; | |
978 | msgtxt = "SMK Error"; | |
979 | } else { | |
980 | msg = SMK_M1; | |
981 | msgtxt = "SMK M1"; | |
982 | } | |
983 | } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) { | |
984 | msg = SMK_M3; | |
985 | msgtxt = "SMK M3"; | |
986 | } else if (key_info & WPA_KEY_INFO_REQUEST) { | |
987 | msg = REQUEST; | |
988 | msgtxt = "Request"; | |
989 | } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) { | |
990 | msg = GROUP_2; | |
991 | msgtxt = "2/2 Group"; | |
3b5b7aa8 JM |
992 | } else if (key_data_length == 0 || |
993 | (mic_len == 0 && (key_info & WPA_KEY_INFO_ENCR_KEY_DATA) && | |
994 | key_data_length == AES_BLOCK_SIZE)) { | |
6fc6879b JM |
995 | msg = PAIRWISE_4; |
996 | msgtxt = "4/4 Pairwise"; | |
997 | } else { | |
998 | msg = PAIRWISE_2; | |
999 | msgtxt = "2/4 Pairwise"; | |
1000 | } | |
1001 | ||
1002 | /* TODO: key_info type validation for PeerKey */ | |
1003 | if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 || | |
1004 | msg == GROUP_2) { | |
1005 | u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK; | |
eb7719ff JM |
1006 | if (sm->pairwise == WPA_CIPHER_CCMP || |
1007 | sm->pairwise == WPA_CIPHER_GCMP) { | |
6fc6879b | 1008 | if (wpa_use_aes_cmac(sm) && |
a14896e8 | 1009 | sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN && |
929a2ea5 | 1010 | !wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) && |
b9866483 | 1011 | !wpa_key_mgmt_fils(sm->wpa_key_mgmt) && |
6fc6879b JM |
1012 | ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) { |
1013 | wpa_auth_logger(wpa_auth, sm->addr, | |
1014 | LOGGER_WARNING, | |
1015 | "advertised support for " | |
1016 | "AES-128-CMAC, but did not " | |
1017 | "use it"); | |
1018 | return; | |
1019 | } | |
1020 | ||
1021 | if (!wpa_use_aes_cmac(sm) && | |
2449791b | 1022 | !wpa_key_mgmt_fils(sm->wpa_key_mgmt) && |
6fc6879b JM |
1023 | ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { |
1024 | wpa_auth_logger(wpa_auth, sm->addr, | |
1025 | LOGGER_WARNING, | |
1026 | "did not use HMAC-SHA1-AES " | |
eb7719ff | 1027 | "with CCMP/GCMP"); |
6fc6879b JM |
1028 | return; |
1029 | } | |
1030 | } | |
929a2ea5 | 1031 | |
2449791b JM |
1032 | if ((wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) || |
1033 | wpa_key_mgmt_fils(sm->wpa_key_mgmt)) && | |
929a2ea5 JM |
1034 | ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) { |
1035 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING, | |
1036 | "did not use EAPOL-Key descriptor version 0 as required for AKM-defined cases"); | |
1037 | return; | |
1038 | } | |
6fc6879b JM |
1039 | } |
1040 | ||
1041 | if (key_info & WPA_KEY_INFO_REQUEST) { | |
1042 | if (sm->req_replay_counter_used && | |
1043 | os_memcmp(key->replay_counter, sm->req_replay_counter, | |
1044 | WPA_REPLAY_COUNTER_LEN) <= 0) { | |
1045 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING, | |
1046 | "received EAPOL-Key request with " | |
1047 | "replayed counter"); | |
1048 | return; | |
1049 | } | |
1050 | } | |
1051 | ||
1052 | if (!(key_info & WPA_KEY_INFO_REQUEST) && | |
68921e24 | 1053 | !wpa_replay_counter_valid(sm->key_replay, key->replay_counter)) { |
22a299ee | 1054 | int i; |
68921e24 JM |
1055 | |
1056 | if (msg == PAIRWISE_2 && | |
1057 | wpa_replay_counter_valid(sm->prev_key_replay, | |
1058 | key->replay_counter) && | |
1059 | sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING && | |
1060 | os_memcmp(sm->SNonce, key->key_nonce, WPA_NONCE_LEN) != 0) | |
1061 | { | |
1062 | /* | |
1063 | * Some supplicant implementations (e.g., Windows XP | |
1064 | * WZC) update SNonce for each EAPOL-Key 2/4. This | |
1065 | * breaks the workaround on accepting any of the | |
1066 | * pending requests, so allow the SNonce to be updated | |
1067 | * even if we have already sent out EAPOL-Key 3/4. | |
1068 | */ | |
1069 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1070 | "Process SNonce update from STA " | |
1071 | "based on retransmitted EAPOL-Key " | |
1072 | "1/4"); | |
1073 | sm->update_snonce = 1; | |
f23c5b17 JM |
1074 | os_memcpy(sm->alt_SNonce, sm->SNonce, WPA_NONCE_LEN); |
1075 | sm->alt_snonce_valid = TRUE; | |
1076 | os_memcpy(sm->alt_replay_counter, | |
1077 | sm->key_replay[0].counter, | |
1078 | WPA_REPLAY_COUNTER_LEN); | |
1079 | goto continue_processing; | |
1080 | } | |
1081 | ||
1082 | if (msg == PAIRWISE_4 && sm->alt_snonce_valid && | |
1083 | sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING && | |
1084 | os_memcmp(key->replay_counter, sm->alt_replay_counter, | |
1085 | WPA_REPLAY_COUNTER_LEN) == 0) { | |
1086 | /* | |
1087 | * Supplicant may still be using the old SNonce since | |
1088 | * there was two EAPOL-Key 2/4 messages and they had | |
1089 | * different SNonce values. | |
1090 | */ | |
1091 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1092 | "Try to process received EAPOL-Key 4/4 based on old Replay Counter and SNonce from an earlier EAPOL-Key 1/4"); | |
68921e24 JM |
1093 | goto continue_processing; |
1094 | } | |
1095 | ||
1096 | if (msg == PAIRWISE_2 && | |
1097 | wpa_replay_counter_valid(sm->prev_key_replay, | |
1098 | key->replay_counter) && | |
1099 | sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING) { | |
1100 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1101 | "ignore retransmitted EAPOL-Key %s - " | |
1102 | "SNonce did not change", msgtxt); | |
1103 | } else { | |
1104 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1105 | "received EAPOL-Key %s with " | |
1106 | "unexpected replay counter", msgtxt); | |
1107 | } | |
22a299ee JM |
1108 | for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) { |
1109 | if (!sm->key_replay[i].valid) | |
1110 | break; | |
1111 | wpa_hexdump(MSG_DEBUG, "pending replay counter", | |
1112 | sm->key_replay[i].counter, | |
1113 | WPA_REPLAY_COUNTER_LEN); | |
1114 | } | |
6fc6879b JM |
1115 | wpa_hexdump(MSG_DEBUG, "received replay counter", |
1116 | key->replay_counter, WPA_REPLAY_COUNTER_LEN); | |
1117 | return; | |
1118 | } | |
1119 | ||
68921e24 | 1120 | continue_processing: |
3b5b7aa8 JM |
1121 | #ifdef CONFIG_FILS |
1122 | if (sm->wpa == WPA_VERSION_WPA2 && mic_len == 0 && | |
1123 | !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { | |
1124 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1125 | "WPA: Encr Key Data bit not set even though AEAD cipher is supposed to be used - drop frame"); | |
1126 | return; | |
1127 | } | |
1128 | #endif /* CONFIG_FILS */ | |
1129 | ||
6fc6879b JM |
1130 | switch (msg) { |
1131 | case PAIRWISE_2: | |
1132 | if (sm->wpa_ptk_state != WPA_PTK_PTKSTART && | |
68921e24 JM |
1133 | sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING && |
1134 | (!sm->update_snonce || | |
1135 | sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING)) { | |
6fc6879b JM |
1136 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, |
1137 | "received EAPOL-Key msg 2/4 in " | |
1138 | "invalid state (%d) - dropped", | |
1139 | sm->wpa_ptk_state); | |
1140 | return; | |
1141 | } | |
bbb921da | 1142 | random_add_randomness(key->key_nonce, WPA_NONCE_LEN); |
08704cd8 JM |
1143 | if (sm->group->reject_4way_hs_for_entropy) { |
1144 | /* | |
1145 | * The system did not have enough entropy to generate | |
1146 | * strong random numbers. Reject the first 4-way | |
1147 | * handshake(s) and collect some entropy based on the | |
1148 | * information from it. Once enough entropy is | |
1149 | * available, the next atempt will trigger GMK/Key | |
1150 | * Counter update and the station will be allowed to | |
1151 | * continue. | |
1152 | */ | |
1153 | wpa_printf(MSG_DEBUG, "WPA: Reject 4-way handshake to " | |
1154 | "collect more entropy for random number " | |
1155 | "generation"); | |
08704cd8 | 1156 | random_mark_pool_ready(); |
08704cd8 JM |
1157 | wpa_sta_disconnect(wpa_auth, sm->addr); |
1158 | return; | |
1159 | } | |
6fc6879b JM |
1160 | break; |
1161 | case PAIRWISE_4: | |
1162 | if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING || | |
1163 | !sm->PTK_valid) { | |
1164 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
1165 | "received EAPOL-Key msg 4/4 in " | |
1166 | "invalid state (%d) - dropped", | |
1167 | sm->wpa_ptk_state); | |
1168 | return; | |
1169 | } | |
1170 | break; | |
1171 | case GROUP_2: | |
1172 | if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING | |
1173 | || !sm->PTK_valid) { | |
1174 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
1175 | "received EAPOL-Key msg 2/2 in " | |
1176 | "invalid state (%d) - dropped", | |
1177 | sm->wpa_ptk_group_state); | |
1178 | return; | |
1179 | } | |
1180 | break; | |
1181 | #ifdef CONFIG_PEERKEY | |
1182 | case SMK_M1: | |
1183 | case SMK_M3: | |
1184 | case SMK_ERROR: | |
1185 | if (!wpa_auth->conf.peerkey) { | |
1186 | wpa_printf(MSG_DEBUG, "RSN: SMK M1/M3/Error, but " | |
1187 | "PeerKey use disabled - ignoring message"); | |
1188 | return; | |
1189 | } | |
1190 | if (!sm->PTK_valid) { | |
1191 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1192 | "received EAPOL-Key msg SMK in " | |
1193 | "invalid state - dropped"); | |
1194 | return; | |
1195 | } | |
1196 | break; | |
1197 | #else /* CONFIG_PEERKEY */ | |
1198 | case SMK_M1: | |
1199 | case SMK_M3: | |
1200 | case SMK_ERROR: | |
1201 | return; /* STSL disabled - ignore SMK messages */ | |
1202 | #endif /* CONFIG_PEERKEY */ | |
1203 | case REQUEST: | |
1204 | break; | |
1205 | } | |
1206 | ||
1207 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1208 | "received EAPOL-Key frame (%s)", msgtxt); | |
1209 | ||
1210 | if (key_info & WPA_KEY_INFO_ACK) { | |
1211 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1212 | "received invalid EAPOL-Key: Key Ack set"); | |
1213 | return; | |
1214 | } | |
1215 | ||
b9866483 JM |
1216 | if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt) && |
1217 | !(key_info & WPA_KEY_INFO_MIC)) { | |
6fc6879b JM |
1218 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, |
1219 | "received invalid EAPOL-Key: Key MIC not set"); | |
1220 | return; | |
1221 | } | |
1222 | ||
b9866483 JM |
1223 | #ifdef CONFIG_FILS |
1224 | if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) && | |
1225 | (key_info & WPA_KEY_INFO_MIC)) { | |
1226 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1227 | "received invalid EAPOL-Key: Key MIC set"); | |
1228 | return; | |
1229 | } | |
1230 | #endif /* CONFIG_FILS */ | |
1231 | ||
6fc6879b | 1232 | sm->MICVerified = FALSE; |
68921e24 | 1233 | if (sm->PTK_valid && !sm->update_snonce) { |
3b5b7aa8 JM |
1234 | if (mic_len && |
1235 | wpa_verify_key_mic(sm->wpa_key_mgmt, &sm->PTK, data, | |
f23c5b17 JM |
1236 | data_len) && |
1237 | (msg != PAIRWISE_4 || !sm->alt_snonce_valid || | |
1238 | wpa_try_alt_snonce(sm, data, data_len))) { | |
6fc6879b JM |
1239 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, |
1240 | "received EAPOL-Key with invalid MIC"); | |
1241 | return; | |
1242 | } | |
75c8563e JM |
1243 | #ifdef CONFIG_FILS |
1244 | if (!mic_len && | |
1245 | wpa_aead_decrypt(sm, &sm->PTK, data, data_len, | |
1246 | &key_data_length) < 0) { | |
1247 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1248 | "received EAPOL-Key with invalid MIC"); | |
1249 | return; | |
1250 | } | |
1251 | #endif /* CONFIG_FILS */ | |
6fc6879b JM |
1252 | sm->MICVerified = TRUE; |
1253 | eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm); | |
e4bf4db9 | 1254 | sm->pending_1_of_4_timeout = 0; |
6fc6879b JM |
1255 | } |
1256 | ||
1257 | if (key_info & WPA_KEY_INFO_REQUEST) { | |
1258 | if (sm->MICVerified) { | |
1259 | sm->req_replay_counter_used = 1; | |
1260 | os_memcpy(sm->req_replay_counter, key->replay_counter, | |
1261 | WPA_REPLAY_COUNTER_LEN); | |
1262 | } else { | |
1263 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1264 | "received EAPOL-Key request with " | |
1265 | "invalid MIC"); | |
1266 | return; | |
1267 | } | |
1268 | ||
1269 | /* | |
1270 | * TODO: should decrypt key data field if encryption was used; | |
1271 | * even though MAC address KDE is not normally encrypted, | |
1272 | * supplicant is allowed to encrypt it. | |
1273 | */ | |
1274 | if (msg == SMK_ERROR) { | |
1275 | #ifdef CONFIG_PEERKEY | |
5e3b5197 | 1276 | wpa_smk_error(wpa_auth, sm, key_data, key_data_length); |
6fc6879b JM |
1277 | #endif /* CONFIG_PEERKEY */ |
1278 | return; | |
1279 | } else if (key_info & WPA_KEY_INFO_ERROR) { | |
c772d054 JM |
1280 | if (wpa_receive_error_report( |
1281 | wpa_auth, sm, | |
1282 | !(key_info & WPA_KEY_INFO_KEY_TYPE)) > 0) | |
1283 | return; /* STA entry was removed */ | |
6fc6879b JM |
1284 | } else if (key_info & WPA_KEY_INFO_KEY_TYPE) { |
1285 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1286 | "received EAPOL-Key Request for new " | |
1287 | "4-Way Handshake"); | |
1288 | wpa_request_new_ptk(sm); | |
1289 | #ifdef CONFIG_PEERKEY | |
1290 | } else if (msg == SMK_M1) { | |
5e3b5197 | 1291 | wpa_smk_m1(wpa_auth, sm, key, key_data, |
5c6787a6 | 1292 | key_data_length); |
6fc6879b JM |
1293 | #endif /* CONFIG_PEERKEY */ |
1294 | } else if (key_data_length > 0 && | |
5e3b5197 JM |
1295 | wpa_parse_kde_ies(key_data, key_data_length, |
1296 | &kde) == 0 && | |
6fc6879b JM |
1297 | kde.mac_addr) { |
1298 | } else { | |
1299 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1300 | "received EAPOL-Key Request for GTK " | |
1301 | "rekeying"); | |
6fc6879b JM |
1302 | eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL); |
1303 | wpa_rekey_gtk(wpa_auth, NULL); | |
1304 | } | |
1305 | } else { | |
68921e24 JM |
1306 | /* Do not allow the same key replay counter to be reused. */ |
1307 | wpa_replay_counter_mark_invalid(sm->key_replay, | |
1308 | key->replay_counter); | |
1309 | ||
1310 | if (msg == PAIRWISE_2) { | |
1311 | /* | |
1312 | * Maintain a copy of the pending EAPOL-Key frames in | |
1313 | * case the EAPOL-Key frame was retransmitted. This is | |
1314 | * needed to allow EAPOL-Key msg 2/4 reply to another | |
1315 | * pending msg 1/4 to update the SNonce to work around | |
1316 | * unexpected supplicant behavior. | |
1317 | */ | |
1318 | os_memcpy(sm->prev_key_replay, sm->key_replay, | |
1319 | sizeof(sm->key_replay)); | |
1320 | } else { | |
1321 | os_memset(sm->prev_key_replay, 0, | |
1322 | sizeof(sm->prev_key_replay)); | |
1323 | } | |
1324 | ||
1325 | /* | |
1326 | * Make sure old valid counters are not accepted anymore and | |
1327 | * do not get copied again. | |
1328 | */ | |
1329 | wpa_replay_counter_mark_invalid(sm->key_replay, NULL); | |
6fc6879b JM |
1330 | } |
1331 | ||
1332 | #ifdef CONFIG_PEERKEY | |
1333 | if (msg == SMK_M3) { | |
5e3b5197 | 1334 | wpa_smk_m3(wpa_auth, sm, key, key_data, key_data_length); |
6fc6879b JM |
1335 | return; |
1336 | } | |
1337 | #endif /* CONFIG_PEERKEY */ | |
1338 | ||
1339 | os_free(sm->last_rx_eapol_key); | |
1340 | sm->last_rx_eapol_key = os_malloc(data_len); | |
1341 | if (sm->last_rx_eapol_key == NULL) | |
1342 | return; | |
1343 | os_memcpy(sm->last_rx_eapol_key, data, data_len); | |
1344 | sm->last_rx_eapol_key_len = data_len; | |
1345 | ||
0d442aff | 1346 | sm->rx_eapol_key_secure = !!(key_info & WPA_KEY_INFO_SECURE); |
6fc6879b JM |
1347 | sm->EAPOLKeyReceived = TRUE; |
1348 | sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE); | |
1349 | sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST); | |
1350 | os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN); | |
1351 | wpa_sm_step(sm); | |
1352 | } | |
1353 | ||
1354 | ||
3c7302c2 JM |
1355 | static int wpa_gmk_to_gtk(const u8 *gmk, const char *label, const u8 *addr, |
1356 | const u8 *gnonce, u8 *gtk, size_t gtk_len) | |
6fc6879b | 1357 | { |
5cb9d5c3 JM |
1358 | u8 data[ETH_ALEN + WPA_NONCE_LEN + 8 + 16]; |
1359 | u8 *pos; | |
3c7302c2 | 1360 | int ret = 0; |
6fc6879b | 1361 | |
5cb9d5c3 JM |
1362 | /* GTK = PRF-X(GMK, "Group key expansion", |
1363 | * AA || GNonce || Time || random data) | |
1364 | * The example described in the IEEE 802.11 standard uses only AA and | |
1365 | * GNonce as inputs here. Add some more entropy since this derivation | |
1366 | * is done only at the Authenticator and as such, does not need to be | |
1367 | * exactly same. | |
1368 | */ | |
6fc6879b JM |
1369 | os_memcpy(data, addr, ETH_ALEN); |
1370 | os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN); | |
5cb9d5c3 JM |
1371 | pos = data + ETH_ALEN + WPA_NONCE_LEN; |
1372 | wpa_get_ntp_timestamp(pos); | |
1373 | pos += 8; | |
3642c431 | 1374 | if (random_get_bytes(pos, 16) < 0) |
3c7302c2 | 1375 | ret = -1; |
6fc6879b | 1376 | |
56586197 | 1377 | #ifdef CONFIG_IEEE80211W |
5cb9d5c3 | 1378 | sha256_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len); |
56586197 | 1379 | #else /* CONFIG_IEEE80211W */ |
3c7302c2 JM |
1380 | if (sha1_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len) |
1381 | < 0) | |
1382 | ret = -1; | |
56586197 | 1383 | #endif /* CONFIG_IEEE80211W */ |
3c7302c2 JM |
1384 | |
1385 | return ret; | |
6fc6879b JM |
1386 | } |
1387 | ||
1388 | ||
1389 | static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx) | |
1390 | { | |
1391 | struct wpa_authenticator *wpa_auth = eloop_ctx; | |
1392 | struct wpa_state_machine *sm = timeout_ctx; | |
1393 | ||
e4bf4db9 | 1394 | sm->pending_1_of_4_timeout = 0; |
6fc6879b JM |
1395 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout"); |
1396 | sm->TimeoutEvt = TRUE; | |
1397 | wpa_sm_step(sm); | |
1398 | } | |
1399 | ||
1400 | ||
1401 | void __wpa_send_eapol(struct wpa_authenticator *wpa_auth, | |
1402 | struct wpa_state_machine *sm, int key_info, | |
1403 | const u8 *key_rsc, const u8 *nonce, | |
1404 | const u8 *kde, size_t kde_len, | |
1405 | int keyidx, int encr, int force_version) | |
1406 | { | |
1407 | struct ieee802_1x_hdr *hdr; | |
1408 | struct wpa_eapol_key *key; | |
5e3b5197 | 1409 | size_t len, mic_len, keyhdrlen; |
6fc6879b JM |
1410 | int alg; |
1411 | int key_data_len, pad_len = 0; | |
1412 | u8 *buf, *pos; | |
1413 | int version, pairwise; | |
22a299ee | 1414 | int i; |
6d014ffc | 1415 | u8 *key_mic, *key_data; |
6fc6879b | 1416 | |
5e3b5197 | 1417 | mic_len = wpa_mic_len(sm->wpa_key_mgmt); |
6d014ffc | 1418 | keyhdrlen = sizeof(*key) + mic_len + 2; |
5e3b5197 JM |
1419 | |
1420 | len = sizeof(struct ieee802_1x_hdr) + keyhdrlen; | |
6fc6879b JM |
1421 | |
1422 | if (force_version) | |
1423 | version = force_version; | |
929a2ea5 | 1424 | else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN || |
36a50fd4 JM |
1425 | wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) || |
1426 | wpa_key_mgmt_fils(sm->wpa_key_mgmt)) | |
a14896e8 | 1427 | version = WPA_KEY_INFO_TYPE_AKM_DEFINED; |
6fc6879b JM |
1428 | else if (wpa_use_aes_cmac(sm)) |
1429 | version = WPA_KEY_INFO_TYPE_AES_128_CMAC; | |
eb7719ff | 1430 | else if (sm->pairwise != WPA_CIPHER_TKIP) |
6fc6879b JM |
1431 | version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES; |
1432 | else | |
1433 | version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4; | |
1434 | ||
8543ed8a | 1435 | pairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE); |
6fc6879b JM |
1436 | |
1437 | wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d " | |
1438 | "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d " | |
1439 | "encr=%d)", | |
1440 | version, | |
1441 | (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0, | |
1442 | (key_info & WPA_KEY_INFO_MIC) ? 1 : 0, | |
1443 | (key_info & WPA_KEY_INFO_ACK) ? 1 : 0, | |
1444 | (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0, | |
1445 | pairwise, (unsigned long) kde_len, keyidx, encr); | |
1446 | ||
1447 | key_data_len = kde_len; | |
1448 | ||
1449 | if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || | |
a14896e8 | 1450 | sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN || |
929a2ea5 | 1451 | wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) || |
6fc6879b JM |
1452 | version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) { |
1453 | pad_len = key_data_len % 8; | |
1454 | if (pad_len) | |
1455 | pad_len = 8 - pad_len; | |
1456 | key_data_len += pad_len + 8; | |
1457 | } | |
1458 | ||
1459 | len += key_data_len; | |
b729fd8d JM |
1460 | if (!mic_len && encr) |
1461 | len += AES_BLOCK_SIZE; | |
6fc6879b JM |
1462 | |
1463 | hdr = os_zalloc(len); | |
1464 | if (hdr == NULL) | |
1465 | return; | |
1466 | hdr->version = wpa_auth->conf.eapol_version; | |
1467 | hdr->type = IEEE802_1X_TYPE_EAPOL_KEY; | |
1468 | hdr->length = host_to_be16(len - sizeof(*hdr)); | |
1469 | key = (struct wpa_eapol_key *) (hdr + 1); | |
6d014ffc | 1470 | key_mic = (u8 *) (key + 1); |
5e3b5197 | 1471 | key_data = ((u8 *) (hdr + 1)) + keyhdrlen; |
6fc6879b JM |
1472 | |
1473 | key->type = sm->wpa == WPA_VERSION_WPA2 ? | |
1474 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; | |
1475 | key_info |= version; | |
1476 | if (encr && sm->wpa == WPA_VERSION_WPA2) | |
1477 | key_info |= WPA_KEY_INFO_ENCR_KEY_DATA; | |
1478 | if (sm->wpa != WPA_VERSION_WPA2) | |
1479 | key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT; | |
1480 | WPA_PUT_BE16(key->key_info, key_info); | |
1481 | ||
1482 | alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group; | |
c3550295 | 1483 | WPA_PUT_BE16(key->key_length, wpa_cipher_key_len(alg)); |
6fc6879b JM |
1484 | if (key_info & WPA_KEY_INFO_SMK_MESSAGE) |
1485 | WPA_PUT_BE16(key->key_length, 0); | |
1486 | ||
1487 | /* FIX: STSL: what to use as key_replay_counter? */ | |
22a299ee JM |
1488 | for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) { |
1489 | sm->key_replay[i].valid = sm->key_replay[i - 1].valid; | |
1490 | os_memcpy(sm->key_replay[i].counter, | |
1491 | sm->key_replay[i - 1].counter, | |
1492 | WPA_REPLAY_COUNTER_LEN); | |
1493 | } | |
1494 | inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN); | |
1495 | os_memcpy(key->replay_counter, sm->key_replay[0].counter, | |
6fc6879b | 1496 | WPA_REPLAY_COUNTER_LEN); |
db099951 JM |
1497 | wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter", |
1498 | key->replay_counter, WPA_REPLAY_COUNTER_LEN); | |
22a299ee | 1499 | sm->key_replay[0].valid = TRUE; |
6fc6879b JM |
1500 | |
1501 | if (nonce) | |
1502 | os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN); | |
1503 | ||
1504 | if (key_rsc) | |
1505 | os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN); | |
1506 | ||
1507 | if (kde && !encr) { | |
5e3b5197 | 1508 | os_memcpy(key_data, kde, kde_len); |
6d014ffc | 1509 | WPA_PUT_BE16(key_mic + mic_len, kde_len); |
b729fd8d JM |
1510 | #ifdef CONFIG_FILS |
1511 | } else if (!mic_len) { | |
1512 | const u8 *aad[1]; | |
1513 | size_t aad_len[1]; | |
1514 | ||
1515 | WPA_PUT_BE16(key_mic, AES_BLOCK_SIZE + kde_len); | |
1516 | wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data", | |
1517 | kde, kde_len); | |
1518 | ||
1519 | wpa_hexdump_key(MSG_DEBUG, "WPA: KEK", | |
1520 | sm->PTK.kek, sm->PTK.kek_len); | |
1521 | /* AES-SIV AAD from EAPOL protocol version field (inclusive) to | |
1522 | * to Key Data (exclusive). */ | |
1523 | aad[0] = (u8 *) hdr; | |
1524 | aad_len[0] = key_mic + 2 - (u8 *) hdr; | |
1525 | if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len, kde, kde_len, | |
1526 | 1, aad, aad_len, key_mic + 2) < 0) { | |
1527 | wpa_printf(MSG_DEBUG, "WPA: AES-SIV encryption failed"); | |
1528 | return; | |
1529 | } | |
1530 | ||
1531 | wpa_hexdump(MSG_DEBUG, "WPA: Encrypted Key Data from SIV", | |
1532 | key_mic + 2, AES_BLOCK_SIZE + kde_len); | |
1533 | #endif /* CONFIG_FILS */ | |
6fc6879b JM |
1534 | } else if (encr && kde) { |
1535 | buf = os_zalloc(key_data_len); | |
1536 | if (buf == NULL) { | |
1537 | os_free(hdr); | |
1538 | return; | |
1539 | } | |
1540 | pos = buf; | |
1541 | os_memcpy(pos, kde, kde_len); | |
1542 | pos += kde_len; | |
1543 | ||
1544 | if (pad_len) | |
1545 | *pos++ = 0xdd; | |
1546 | ||
1547 | wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data", | |
1548 | buf, key_data_len); | |
1549 | if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || | |
a14896e8 | 1550 | sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN || |
929a2ea5 | 1551 | wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) || |
6fc6879b | 1552 | version == WPA_KEY_INFO_TYPE_AES_128_CMAC) { |
98cd3d1c | 1553 | if (aes_wrap(sm->PTK.kek, sm->PTK.kek_len, |
5e3b5197 | 1554 | (key_data_len - 8) / 8, buf, key_data)) { |
6fc6879b JM |
1555 | os_free(hdr); |
1556 | os_free(buf); | |
1557 | return; | |
1558 | } | |
6d014ffc | 1559 | WPA_PUT_BE16(key_mic + mic_len, key_data_len); |
7cb53ded | 1560 | #ifndef CONFIG_NO_RC4 |
98cd3d1c | 1561 | } else if (sm->PTK.kek_len == 16) { |
6fc6879b JM |
1562 | u8 ek[32]; |
1563 | os_memcpy(key->key_iv, | |
1564 | sm->group->Counter + WPA_NONCE_LEN - 16, 16); | |
1565 | inc_byte_array(sm->group->Counter, WPA_NONCE_LEN); | |
1566 | os_memcpy(ek, key->key_iv, 16); | |
98cd3d1c | 1567 | os_memcpy(ek + 16, sm->PTK.kek, sm->PTK.kek_len); |
5e3b5197 JM |
1568 | os_memcpy(key_data, buf, key_data_len); |
1569 | rc4_skip(ek, 32, 256, key_data, key_data_len); | |
6d014ffc | 1570 | WPA_PUT_BE16(key_mic + mic_len, key_data_len); |
7cb53ded | 1571 | #endif /* CONFIG_NO_RC4 */ |
98cd3d1c JM |
1572 | } else { |
1573 | os_free(hdr); | |
1574 | os_free(buf); | |
1575 | return; | |
6fc6879b JM |
1576 | } |
1577 | os_free(buf); | |
1578 | } | |
1579 | ||
1580 | if (key_info & WPA_KEY_INFO_MIC) { | |
b729fd8d | 1581 | if (!sm->PTK_valid || !mic_len) { |
6fc6879b JM |
1582 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, |
1583 | "PTK not valid when sending EAPOL-Key " | |
1584 | "frame"); | |
1585 | os_free(hdr); | |
1586 | return; | |
1587 | } | |
5e3b5197 | 1588 | |
98cd3d1c JM |
1589 | wpa_eapol_key_mic(sm->PTK.kck, sm->PTK.kck_len, |
1590 | sm->wpa_key_mgmt, version, | |
5e3b5197 | 1591 | (u8 *) hdr, len, key_mic); |
7af092a0 JB |
1592 | #ifdef CONFIG_TESTING_OPTIONS |
1593 | if (!pairwise && | |
06df2aa6 | 1594 | wpa_auth->conf.corrupt_gtk_rekey_mic_probability > 0.0 && |
7af092a0 JB |
1595 | drand48() < |
1596 | wpa_auth->conf.corrupt_gtk_rekey_mic_probability) { | |
1597 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1598 | "Corrupting group EAPOL-Key Key MIC"); | |
5e3b5197 | 1599 | key_mic[0]++; |
7af092a0 JB |
1600 | } |
1601 | #endif /* CONFIG_TESTING_OPTIONS */ | |
6fc6879b JM |
1602 | } |
1603 | ||
1604 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx, | |
1605 | 1); | |
1606 | wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len, | |
1607 | sm->pairwise_set); | |
1608 | os_free(hdr); | |
1609 | } | |
1610 | ||
1611 | ||
1612 | static void wpa_send_eapol(struct wpa_authenticator *wpa_auth, | |
1613 | struct wpa_state_machine *sm, int key_info, | |
1614 | const u8 *key_rsc, const u8 *nonce, | |
1615 | const u8 *kde, size_t kde_len, | |
1616 | int keyidx, int encr) | |
1617 | { | |
1618 | int timeout_ms; | |
1619 | int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE; | |
bae61562 | 1620 | int ctr; |
6fc6879b JM |
1621 | |
1622 | if (sm == NULL) | |
1623 | return; | |
1624 | ||
1625 | __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len, | |
1626 | keyidx, encr, 0); | |
1627 | ||
bae61562 | 1628 | ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr; |
e4bf4db9 | 1629 | if (ctr == 1 && wpa_auth->conf.tx_status) |
00338a4f JM |
1630 | timeout_ms = pairwise ? eapol_key_timeout_first : |
1631 | eapol_key_timeout_first_group; | |
bae61562 JM |
1632 | else |
1633 | timeout_ms = eapol_key_timeout_subseq; | |
e4bf4db9 JM |
1634 | if (pairwise && ctr == 1 && !(key_info & WPA_KEY_INFO_MIC)) |
1635 | sm->pending_1_of_4_timeout = 1; | |
1636 | wpa_printf(MSG_DEBUG, "WPA: Use EAPOL-Key timeout of %u ms (retry " | |
1637 | "counter %d)", timeout_ms, ctr); | |
6fc6879b JM |
1638 | eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000, |
1639 | wpa_send_eapol_timeout, wpa_auth, sm); | |
1640 | } | |
1641 | ||
1642 | ||
929a2ea5 JM |
1643 | static int wpa_verify_key_mic(int akmp, struct wpa_ptk *PTK, u8 *data, |
1644 | size_t data_len) | |
6fc6879b JM |
1645 | { |
1646 | struct ieee802_1x_hdr *hdr; | |
1647 | struct wpa_eapol_key *key; | |
1648 | u16 key_info; | |
1649 | int ret = 0; | |
6d014ffc | 1650 | u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN], *mic_pos; |
5e3b5197 | 1651 | size_t mic_len = wpa_mic_len(akmp); |
6fc6879b JM |
1652 | |
1653 | if (data_len < sizeof(*hdr) + sizeof(*key)) | |
1654 | return -1; | |
1655 | ||
1656 | hdr = (struct ieee802_1x_hdr *) data; | |
1657 | key = (struct wpa_eapol_key *) (hdr + 1); | |
6d014ffc | 1658 | mic_pos = (u8 *) (key + 1); |
6fc6879b | 1659 | key_info = WPA_GET_BE16(key->key_info); |
6d014ffc JM |
1660 | os_memcpy(mic, mic_pos, mic_len); |
1661 | os_memset(mic_pos, 0, mic_len); | |
98cd3d1c JM |
1662 | if (wpa_eapol_key_mic(PTK->kck, PTK->kck_len, akmp, |
1663 | key_info & WPA_KEY_INFO_TYPE_MASK, | |
6d014ffc JM |
1664 | data, data_len, mic_pos) || |
1665 | os_memcmp_const(mic, mic_pos, mic_len) != 0) | |
6fc6879b | 1666 | ret = -1; |
6d014ffc | 1667 | os_memcpy(mic_pos, mic, mic_len); |
6fc6879b JM |
1668 | return ret; |
1669 | } | |
1670 | ||
1671 | ||
1672 | void wpa_remove_ptk(struct wpa_state_machine *sm) | |
1673 | { | |
1674 | sm->PTK_valid = FALSE; | |
1675 | os_memset(&sm->PTK, 0, sizeof(sm->PTK)); | |
2a0b86d3 JM |
1676 | if (wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, NULL, |
1677 | 0)) | |
1678 | wpa_printf(MSG_DEBUG, | |
1679 | "RSN: PTK removal from the driver failed"); | |
6fc6879b | 1680 | sm->pairwise_set = FALSE; |
581a8cde | 1681 | eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm); |
6fc6879b JM |
1682 | } |
1683 | ||
1684 | ||
bb119228 | 1685 | int wpa_auth_sm_event(struct wpa_state_machine *sm, enum wpa_event event) |
6fc6879b | 1686 | { |
5d22a1d5 JM |
1687 | int remove_ptk = 1; |
1688 | ||
6fc6879b | 1689 | if (sm == NULL) |
6f9b5d16 | 1690 | return -1; |
6fc6879b JM |
1691 | |
1692 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
1693 | "event %d notification", event); | |
1694 | ||
1695 | switch (event) { | |
1696 | case WPA_AUTH: | |
c50d94f1 BC |
1697 | #ifdef CONFIG_MESH |
1698 | /* PTKs are derived through AMPE */ | |
1699 | if (wpa_auth_start_ampe(sm->wpa_auth, sm->addr)) { | |
1700 | /* not mesh */ | |
1701 | break; | |
1702 | } | |
1703 | return 0; | |
1704 | #endif /* CONFIG_MESH */ | |
6fc6879b JM |
1705 | case WPA_ASSOC: |
1706 | break; | |
1707 | case WPA_DEAUTH: | |
1708 | case WPA_DISASSOC: | |
1709 | sm->DeauthenticationRequest = TRUE; | |
1710 | break; | |
1711 | case WPA_REAUTH: | |
1712 | case WPA_REAUTH_EAPOL: | |
3ab72b62 JM |
1713 | if (!sm->started) { |
1714 | /* | |
1715 | * When using WPS, we may end up here if the STA | |
1716 | * manages to re-associate without the previous STA | |
1717 | * entry getting removed. Consequently, we need to make | |
1718 | * sure that the WPA state machines gets initialized | |
1719 | * properly at this point. | |
1720 | */ | |
1721 | wpa_printf(MSG_DEBUG, "WPA state machine had not been " | |
1722 | "started - initialize now"); | |
1723 | sm->started = 1; | |
1724 | sm->Init = TRUE; | |
1725 | if (wpa_sm_step(sm) == 1) | |
1726 | return 1; /* should not really happen */ | |
1727 | sm->Init = FALSE; | |
1728 | sm->AuthenticationRequest = TRUE; | |
1729 | break; | |
1730 | } | |
9663596f JM |
1731 | if (sm->GUpdateStationKeys) { |
1732 | /* | |
1733 | * Reauthentication cancels the pending group key | |
1734 | * update for this STA. | |
1735 | */ | |
1736 | sm->group->GKeyDoneStations--; | |
1737 | sm->GUpdateStationKeys = FALSE; | |
1738 | sm->PtkGroupInit = TRUE; | |
1739 | } | |
6fc6879b JM |
1740 | sm->ReAuthenticationRequest = TRUE; |
1741 | break; | |
1742 | case WPA_ASSOC_FT: | |
4ec1fd8e | 1743 | #ifdef CONFIG_IEEE80211R_AP |
81a658d7 JM |
1744 | wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration " |
1745 | "after association"); | |
1746 | wpa_ft_install_ptk(sm); | |
1747 | ||
6fc6879b JM |
1748 | /* Using FT protocol, not WPA auth state machine */ |
1749 | sm->ft_completed = 1; | |
6f9b5d16 | 1750 | return 0; |
4ec1fd8e | 1751 | #else /* CONFIG_IEEE80211R_AP */ |
6fc6879b | 1752 | break; |
4ec1fd8e | 1753 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b JM |
1754 | } |
1755 | ||
4ec1fd8e | 1756 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b | 1757 | sm->ft_completed = 0; |
4ec1fd8e | 1758 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b | 1759 | |
5d22a1d5 JM |
1760 | #ifdef CONFIG_IEEE80211W |
1761 | if (sm->mgmt_frame_prot && event == WPA_AUTH) | |
1762 | remove_ptk = 0; | |
1763 | #endif /* CONFIG_IEEE80211W */ | |
78815f3d | 1764 | #ifdef CONFIG_FILS |
da24c5aa JM |
1765 | if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) && |
1766 | (event == WPA_AUTH || event == WPA_ASSOC)) | |
78815f3d JM |
1767 | remove_ptk = 0; |
1768 | #endif /* CONFIG_FILS */ | |
6fc6879b | 1769 | |
5d22a1d5 JM |
1770 | if (remove_ptk) { |
1771 | sm->PTK_valid = FALSE; | |
1772 | os_memset(&sm->PTK, 0, sizeof(sm->PTK)); | |
1773 | ||
1774 | if (event != WPA_REAUTH_EAPOL) | |
1775 | wpa_remove_ptk(sm); | |
1776 | } | |
6fc6879b | 1777 | |
43f49c37 JM |
1778 | if (sm->in_step_loop) { |
1779 | /* | |
1780 | * wpa_sm_step() is already running - avoid recursive call to | |
1781 | * it by making the existing loop process the new update. | |
1782 | */ | |
1783 | sm->changed = TRUE; | |
1784 | return 0; | |
1785 | } | |
6f9b5d16 | 1786 | return wpa_sm_step(sm); |
6fc6879b JM |
1787 | } |
1788 | ||
1789 | ||
6fc6879b JM |
1790 | SM_STATE(WPA_PTK, INITIALIZE) |
1791 | { | |
1792 | SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk); | |
1793 | if (sm->Init) { | |
1794 | /* Init flag is not cleared here, so avoid busy | |
1795 | * loop by claiming nothing changed. */ | |
1796 | sm->changed = FALSE; | |
1797 | } | |
1798 | ||
1799 | sm->keycount = 0; | |
1800 | if (sm->GUpdateStationKeys) | |
1801 | sm->group->GKeyDoneStations--; | |
1802 | sm->GUpdateStationKeys = FALSE; | |
1803 | if (sm->wpa == WPA_VERSION_WPA) | |
1804 | sm->PInitAKeys = FALSE; | |
1805 | if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and | |
1806 | * Local AA > Remote AA)) */) { | |
1807 | sm->Pair = TRUE; | |
1808 | } | |
1809 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0); | |
1810 | wpa_remove_ptk(sm); | |
1811 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0); | |
1812 | sm->TimeoutCtr = 0; | |
56586197 | 1813 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) { |
6fc6879b JM |
1814 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, |
1815 | WPA_EAPOL_authorized, 0); | |
1816 | } | |
1817 | } | |
1818 | ||
1819 | ||
1820 | SM_STATE(WPA_PTK, DISCONNECT) | |
1821 | { | |
1822 | SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk); | |
1823 | sm->Disconnect = FALSE; | |
1824 | wpa_sta_disconnect(sm->wpa_auth, sm->addr); | |
1825 | } | |
1826 | ||
1827 | ||
1828 | SM_STATE(WPA_PTK, DISCONNECTED) | |
1829 | { | |
1830 | SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk); | |
1831 | sm->DeauthenticationRequest = FALSE; | |
1832 | } | |
1833 | ||
1834 | ||
1835 | SM_STATE(WPA_PTK, AUTHENTICATION) | |
1836 | { | |
1837 | SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk); | |
1838 | os_memset(&sm->PTK, 0, sizeof(sm->PTK)); | |
1839 | sm->PTK_valid = FALSE; | |
1840 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto, | |
1841 | 1); | |
1842 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1); | |
1843 | sm->AuthenticationRequest = FALSE; | |
1844 | } | |
1845 | ||
1846 | ||
40d00d2b NC |
1847 | static void wpa_group_ensure_init(struct wpa_authenticator *wpa_auth, |
1848 | struct wpa_group *group) | |
1bdb7ab3 | 1849 | { |
40d00d2b NC |
1850 | if (group->first_sta_seen) |
1851 | return; | |
1bdb7ab3 JM |
1852 | /* |
1853 | * System has run bit further than at the time hostapd was started | |
1854 | * potentially very early during boot up. This provides better chances | |
1855 | * of collecting more randomness on embedded systems. Re-initialize the | |
1856 | * GMK and Counter here to improve their strength if there was not | |
1857 | * enough entropy available immediately after system startup. | |
1858 | */ | |
1859 | wpa_printf(MSG_DEBUG, "WPA: Re-initialize GMK/Counter on first " | |
1860 | "station"); | |
08704cd8 JM |
1861 | if (random_pool_ready() != 1) { |
1862 | wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool " | |
1863 | "to proceed - reject first 4-way handshake"); | |
1864 | group->reject_4way_hs_for_entropy = TRUE; | |
40d00d2b NC |
1865 | } else { |
1866 | group->first_sta_seen = TRUE; | |
1867 | group->reject_4way_hs_for_entropy = FALSE; | |
08704cd8 | 1868 | } |
40d00d2b | 1869 | |
aac1efec JM |
1870 | if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0 || |
1871 | wpa_gtk_update(wpa_auth, group) < 0 || | |
1872 | wpa_group_config_group_keys(wpa_auth, group) < 0) { | |
1873 | wpa_printf(MSG_INFO, "WPA: GMK/GTK setup failed"); | |
1874 | group->first_sta_seen = FALSE; | |
1875 | group->reject_4way_hs_for_entropy = TRUE; | |
1876 | } | |
1bdb7ab3 JM |
1877 | } |
1878 | ||
1879 | ||
6fc6879b JM |
1880 | SM_STATE(WPA_PTK, AUTHENTICATION2) |
1881 | { | |
1882 | SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk); | |
1bdb7ab3 | 1883 | |
40d00d2b | 1884 | wpa_group_ensure_init(sm->wpa_auth, sm->group); |
65a32cdb | 1885 | sm->ReAuthenticationRequest = FALSE; |
1bdb7ab3 | 1886 | |
3825a19b JM |
1887 | /* |
1888 | * Definition of ANonce selection in IEEE Std 802.11i-2004 is somewhat | |
1889 | * ambiguous. The Authenticator state machine uses a counter that is | |
1890 | * incremented by one for each 4-way handshake. However, the security | |
1891 | * analysis of 4-way handshake points out that unpredictable nonces | |
1892 | * help in preventing precomputation attacks. Instead of the state | |
1893 | * machine definition, use an unpredictable nonce value here to provide | |
1894 | * stronger protection against potential precomputation attacks. | |
1895 | */ | |
1896 | if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) { | |
1897 | wpa_printf(MSG_ERROR, "WPA: Failed to get random data for " | |
1898 | "ANonce."); | |
65a32cdb | 1899 | sm->Disconnect = TRUE; |
3825a19b JM |
1900 | return; |
1901 | } | |
bc8318ac JM |
1902 | wpa_hexdump(MSG_DEBUG, "WPA: Assign ANonce", sm->ANonce, |
1903 | WPA_NONCE_LEN); | |
6fc6879b JM |
1904 | /* IEEE 802.11i does not clear TimeoutCtr here, but this is more |
1905 | * logical place than INITIALIZE since AUTHENTICATION2 can be | |
1906 | * re-entered on ReAuthenticationRequest without going through | |
1907 | * INITIALIZE. */ | |
1908 | sm->TimeoutCtr = 0; | |
1909 | } | |
1910 | ||
1911 | ||
1912 | SM_STATE(WPA_PTK, INITPMK) | |
1913 | { | |
1914 | u8 msk[2 * PMK_LEN]; | |
1915 | size_t len = 2 * PMK_LEN; | |
1916 | ||
1917 | SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk); | |
4ec1fd8e | 1918 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b | 1919 | sm->xxkey_len = 0; |
4ec1fd8e | 1920 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b JM |
1921 | if (sm->pmksa) { |
1922 | wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache"); | |
207976f0 JM |
1923 | os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len); |
1924 | sm->pmk_len = sm->pmksa->pmk_len; | |
6fc6879b | 1925 | } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) { |
207976f0 JM |
1926 | unsigned int pmk_len; |
1927 | ||
1928 | if (sm->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X_SUITE_B_192) | |
1929 | pmk_len = PMK_LEN_SUITE_B_192; | |
1930 | else | |
1931 | pmk_len = PMK_LEN; | |
6fc6879b | 1932 | wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine " |
207976f0 JM |
1933 | "(MSK len=%lu PMK len=%u)", (unsigned long) len, |
1934 | pmk_len); | |
1935 | if (len < pmk_len) { | |
1936 | wpa_printf(MSG_DEBUG, | |
1937 | "WPA: MSK not long enough (%u) to create PMK (%u)", | |
1938 | (unsigned int) len, (unsigned int) pmk_len); | |
1939 | sm->Disconnect = TRUE; | |
1940 | return; | |
1941 | } | |
1942 | os_memcpy(sm->PMK, msk, pmk_len); | |
1943 | sm->pmk_len = pmk_len; | |
4ec1fd8e | 1944 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b JM |
1945 | if (len >= 2 * PMK_LEN) { |
1946 | os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN); | |
1947 | sm->xxkey_len = PMK_LEN; | |
1948 | } | |
4ec1fd8e | 1949 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b | 1950 | } else { |
400de9b1 BG |
1951 | wpa_printf(MSG_DEBUG, "WPA: Could not get PMK, get_msk: %p", |
1952 | sm->wpa_auth->cb.get_msk); | |
1180dd66 JM |
1953 | sm->Disconnect = TRUE; |
1954 | return; | |
6fc6879b | 1955 | } |
40aaa64f | 1956 | os_memset(msk, 0, sizeof(msk)); |
6fc6879b JM |
1957 | |
1958 | sm->req_replay_counter_used = 0; | |
1959 | /* IEEE 802.11i does not set keyRun to FALSE, but not doing this | |
1960 | * will break reauthentication since EAPOL state machines may not be | |
1961 | * get into AUTHENTICATING state that clears keyRun before WPA state | |
1962 | * machine enters AUTHENTICATION2 state and goes immediately to INITPMK | |
1963 | * state and takes PMK from the previously used AAA Key. This will | |
1964 | * eventually fail in 4-Way Handshake because Supplicant uses PMK | |
1965 | * derived from the new AAA Key. Setting keyRun = FALSE here seems to | |
1966 | * be good workaround for this issue. */ | |
1967 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0); | |
1968 | } | |
1969 | ||
1970 | ||
1971 | SM_STATE(WPA_PTK, INITPSK) | |
1972 | { | |
1973 | const u8 *psk; | |
1974 | SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk); | |
759fd76b | 1975 | psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr, NULL); |
6fc6879b JM |
1976 | if (psk) { |
1977 | os_memcpy(sm->PMK, psk, PMK_LEN); | |
207976f0 | 1978 | sm->pmk_len = PMK_LEN; |
4ec1fd8e | 1979 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b JM |
1980 | os_memcpy(sm->xxkey, psk, PMK_LEN); |
1981 | sm->xxkey_len = PMK_LEN; | |
4ec1fd8e | 1982 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b JM |
1983 | } |
1984 | sm->req_replay_counter_used = 0; | |
1985 | } | |
1986 | ||
1987 | ||
1988 | SM_STATE(WPA_PTK, PTKSTART) | |
1989 | { | |
1990 | u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL; | |
1991 | size_t pmkid_len = 0; | |
1992 | ||
1993 | SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk); | |
1994 | sm->PTKRequest = FALSE; | |
1995 | sm->TimeoutEvt = FALSE; | |
f23c5b17 | 1996 | sm->alt_snonce_valid = FALSE; |
bae61562 JM |
1997 | |
1998 | sm->TimeoutCtr++; | |
1999 | if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) { | |
2000 | /* No point in sending the EAPOL-Key - we will disconnect | |
2001 | * immediately following this. */ | |
2002 | return; | |
2003 | } | |
2004 | ||
6fc6879b JM |
2005 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, |
2006 | "sending 1/4 msg of 4-Way Handshake"); | |
2007 | /* | |
2008 | * TODO: Could add PMKID even with WPA2-PSK, but only if there is only | |
2009 | * one possible PSK for this STA. | |
2010 | */ | |
2011 | if (sm->wpa == WPA_VERSION_WPA2 && | |
a14896e8 JM |
2012 | wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) && |
2013 | sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN) { | |
6fc6879b JM |
2014 | pmkid = buf; |
2015 | pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN; | |
2016 | pmkid[0] = WLAN_EID_VENDOR_SPECIFIC; | |
2017 | pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN; | |
2018 | RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID); | |
929a2ea5 | 2019 | if (sm->pmksa) { |
6fc6879b JM |
2020 | os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN], |
2021 | sm->pmksa->pmkid, PMKID_LEN); | |
929a2ea5 JM |
2022 | } else if (wpa_key_mgmt_suite_b(sm->wpa_key_mgmt)) { |
2023 | /* No KCK available to derive PMKID */ | |
2024 | pmkid = NULL; | |
2025 | } else { | |
6fc6879b JM |
2026 | /* |
2027 | * Calculate PMKID since no PMKSA cache entry was | |
2028 | * available with pre-calculated PMKID. | |
2029 | */ | |
207976f0 | 2030 | rsn_pmkid(sm->PMK, sm->pmk_len, sm->wpa_auth->addr, |
56586197 JM |
2031 | sm->addr, &pmkid[2 + RSN_SELECTOR_LEN], |
2032 | wpa_key_mgmt_sha256(sm->wpa_key_mgmt)); | |
6fc6879b JM |
2033 | } |
2034 | } | |
2035 | wpa_send_eapol(sm->wpa_auth, sm, | |
2036 | WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL, | |
2037 | sm->ANonce, pmkid, pmkid_len, 0, 0); | |
6fc6879b JM |
2038 | } |
2039 | ||
2040 | ||
f23c5b17 | 2041 | static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce, |
207976f0 JM |
2042 | const u8 *pmk, unsigned int pmk_len, |
2043 | struct wpa_ptk *ptk) | |
6fc6879b | 2044 | { |
4ec1fd8e | 2045 | #ifdef CONFIG_IEEE80211R_AP |
56586197 | 2046 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) |
98cd3d1c | 2047 | return wpa_auth_derive_ptk_ft(sm, pmk, ptk); |
4ec1fd8e | 2048 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b | 2049 | |
207976f0 | 2050 | return wpa_pmk_to_ptk(pmk, pmk_len, "Pairwise key expansion", |
98cd3d1c JM |
2051 | sm->wpa_auth->addr, sm->addr, sm->ANonce, snonce, |
2052 | ptk, sm->wpa_key_mgmt, sm->pairwise); | |
6fc6879b JM |
2053 | } |
2054 | ||
2055 | ||
3b5b7aa8 | 2056 | #ifdef CONFIG_FILS |
c4fd6d8a JM |
2057 | |
2058 | int fils_auth_pmk_to_ptk(struct wpa_state_machine *sm, const u8 *pmk, | |
2059 | size_t pmk_len, const u8 *snonce, const u8 *anonce) | |
2060 | { | |
2061 | u8 ick[FILS_ICK_MAX_LEN]; | |
2062 | size_t ick_len; | |
2063 | int res; | |
2064 | ||
2065 | res = fils_pmk_to_ptk(pmk, pmk_len, sm->addr, sm->wpa_auth->addr, | |
2066 | snonce, anonce, &sm->PTK, ick, &ick_len, | |
2067 | sm->wpa_key_mgmt, sm->pairwise); | |
2068 | if (res < 0) | |
2069 | return res; | |
2070 | sm->PTK_valid = TRUE; | |
2071 | ||
2072 | res = fils_key_auth_sk(ick, ick_len, snonce, anonce, | |
2073 | sm->addr, sm->wpa_auth->addr, | |
2074 | NULL, 0, NULL, 0, /* TODO: SK+PFS */ | |
2075 | sm->wpa_key_mgmt, sm->fils_key_auth_sta, | |
2076 | sm->fils_key_auth_ap, | |
2077 | &sm->fils_key_auth_len); | |
2078 | os_memset(ick, 0, sizeof(ick)); | |
78815f3d JM |
2079 | |
2080 | /* Store nonces for (Re)Association Request/Response frame processing */ | |
2081 | os_memcpy(sm->SNonce, snonce, FILS_NONCE_LEN); | |
2082 | os_memcpy(sm->ANonce, anonce, FILS_NONCE_LEN); | |
2083 | ||
c4fd6d8a JM |
2084 | return res; |
2085 | } | |
2086 | ||
2087 | ||
3b5b7aa8 | 2088 | static int wpa_aead_decrypt(struct wpa_state_machine *sm, struct wpa_ptk *ptk, |
75c8563e | 2089 | u8 *buf, size_t buf_len, u16 *_key_data_len) |
3b5b7aa8 JM |
2090 | { |
2091 | struct ieee802_1x_hdr *hdr; | |
2092 | struct wpa_eapol_key *key; | |
2093 | u8 *pos; | |
2094 | u16 key_data_len; | |
2095 | u8 *tmp; | |
2096 | const u8 *aad[1]; | |
2097 | size_t aad_len[1]; | |
2098 | ||
75c8563e | 2099 | hdr = (struct ieee802_1x_hdr *) buf; |
3b5b7aa8 JM |
2100 | key = (struct wpa_eapol_key *) (hdr + 1); |
2101 | pos = (u8 *) (key + 1); | |
2102 | key_data_len = WPA_GET_BE16(pos); | |
2103 | if (key_data_len < AES_BLOCK_SIZE || | |
2104 | key_data_len > buf_len - sizeof(*hdr) - sizeof(*key) - 2) { | |
2105 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO, | |
2106 | "No room for AES-SIV data in the frame"); | |
2107 | return -1; | |
2108 | } | |
2109 | pos += 2; /* Pointing at the Encrypted Key Data field */ | |
2110 | ||
2111 | tmp = os_malloc(key_data_len); | |
2112 | if (!tmp) | |
2113 | return -1; | |
2114 | ||
2115 | /* AES-SIV AAD from EAPOL protocol version field (inclusive) to | |
2116 | * to Key Data (exclusive). */ | |
75c8563e JM |
2117 | aad[0] = buf; |
2118 | aad_len[0] = pos - buf; | |
3b5b7aa8 JM |
2119 | if (aes_siv_decrypt(ptk->kek, ptk->kek_len, pos, key_data_len, |
2120 | 1, aad, aad_len, tmp) < 0) { | |
2121 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO, | |
2122 | "Invalid AES-SIV data in the frame"); | |
2123 | bin_clear_free(tmp, key_data_len); | |
2124 | return -1; | |
2125 | } | |
2126 | ||
2127 | /* AEAD decryption and validation completed successfully */ | |
2128 | key_data_len -= AES_BLOCK_SIZE; | |
2129 | wpa_hexdump_key(MSG_DEBUG, "WPA: Decrypted Key Data", | |
2130 | tmp, key_data_len); | |
2131 | ||
2132 | /* Replace Key Data field with the decrypted version */ | |
2133 | os_memcpy(pos, tmp, key_data_len); | |
2134 | pos -= 2; /* Key Data Length field */ | |
2135 | WPA_PUT_BE16(pos, key_data_len); | |
2136 | bin_clear_free(tmp, key_data_len); | |
2137 | if (_key_data_len) | |
2138 | *_key_data_len = key_data_len; | |
2139 | return 0; | |
2140 | } | |
78815f3d JM |
2141 | |
2142 | ||
2143 | int fils_decrypt_assoc(struct wpa_state_machine *sm, const u8 *fils_session, | |
2144 | const struct ieee80211_mgmt *mgmt, size_t frame_len, | |
2145 | u8 *pos, size_t left) | |
2146 | { | |
2147 | u16 fc, stype; | |
2148 | const u8 *end, *ie_start, *ie, *session, *crypt; | |
2149 | struct ieee802_11_elems elems; | |
2150 | const u8 *aad[5]; | |
2151 | size_t aad_len[5]; | |
2152 | ||
2153 | if (!sm || !sm->PTK_valid) { | |
2154 | wpa_printf(MSG_DEBUG, | |
2155 | "FILS: No KEK to decrypt Assocication Request frame"); | |
2156 | return -1; | |
2157 | } | |
2158 | ||
2159 | if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt)) { | |
2160 | wpa_printf(MSG_DEBUG, | |
2161 | "FILS: Not a FILS AKM - reject association"); | |
2162 | return -1; | |
2163 | } | |
2164 | ||
2165 | end = ((const u8 *) mgmt) + frame_len; | |
2166 | fc = le_to_host16(mgmt->frame_control); | |
2167 | stype = WLAN_FC_GET_STYPE(fc); | |
2168 | if (stype == WLAN_FC_STYPE_REASSOC_REQ) | |
2169 | ie_start = mgmt->u.reassoc_req.variable; | |
2170 | else | |
2171 | ie_start = mgmt->u.assoc_req.variable; | |
2172 | ie = ie_start; | |
2173 | ||
2174 | /* | |
2175 | * Find FILS Session element which is the last unencrypted element in | |
2176 | * the frame. | |
2177 | */ | |
2178 | session = NULL; | |
2179 | while (ie + 1 < end) { | |
2180 | if (ie + 2 + ie[1] > end) | |
2181 | break; | |
2182 | if (ie[0] == WLAN_EID_EXTENSION && | |
2183 | ie[1] >= 1 + FILS_SESSION_LEN && | |
2184 | ie[2] == WLAN_EID_EXT_FILS_SESSION) { | |
2185 | session = ie; | |
2186 | break; | |
2187 | } | |
2188 | ie += 2 + ie[1]; | |
2189 | } | |
2190 | ||
2191 | if (!session) { | |
2192 | wpa_printf(MSG_DEBUG, | |
2193 | "FILS: Could not find FILS Session element in Association Request frame - reject"); | |
2194 | return -1; | |
2195 | } | |
2196 | if (os_memcmp(fils_session, session + 3, FILS_SESSION_LEN) != 0) { | |
2197 | wpa_printf(MSG_DEBUG, "FILS: Session mismatch"); | |
2198 | wpa_hexdump(MSG_DEBUG, "FILS: Expected FILS Session", | |
2199 | fils_session, FILS_SESSION_LEN); | |
2200 | wpa_hexdump(MSG_DEBUG, "FILS: Received FILS Session", | |
2201 | session + 3, FILS_SESSION_LEN); | |
2202 | return -1; | |
2203 | } | |
2204 | crypt = session + 2 + session[1]; | |
2205 | ||
2206 | if (end - crypt < AES_BLOCK_SIZE) { | |
2207 | wpa_printf(MSG_DEBUG, | |
2208 | "FILS: Too short frame to include AES-SIV data"); | |
2209 | return -1; | |
2210 | } | |
2211 | ||
2212 | /* AES-SIV AAD vectors */ | |
2213 | ||
2214 | /* The STA's MAC address */ | |
2215 | aad[0] = mgmt->sa; | |
2216 | aad_len[0] = ETH_ALEN; | |
2217 | /* The AP's BSSID */ | |
2218 | aad[1] = mgmt->da; | |
2219 | aad_len[1] = ETH_ALEN; | |
2220 | /* The STA's nonce */ | |
2221 | aad[2] = sm->SNonce; | |
2222 | aad_len[2] = FILS_NONCE_LEN; | |
2223 | /* The AP's nonce */ | |
2224 | aad[3] = sm->ANonce; | |
2225 | aad_len[3] = FILS_NONCE_LEN; | |
2226 | /* | |
2227 | * The (Re)Association Request frame from the Capability Information | |
2228 | * field to the FILS Session element (both inclusive). | |
2229 | */ | |
2230 | aad[4] = (const u8 *) &mgmt->u.assoc_req.capab_info; | |
2231 | aad_len[4] = crypt - aad[0]; | |
2232 | ||
2233 | if (aes_siv_decrypt(sm->PTK.kek, sm->PTK.kek_len, crypt, end - crypt, | |
2234 | 1, aad, aad_len, pos + (crypt - ie_start)) < 0) { | |
2235 | wpa_printf(MSG_DEBUG, | |
2236 | "FILS: Invalid AES-SIV data in the frame"); | |
2237 | return -1; | |
2238 | } | |
2239 | wpa_hexdump(MSG_DEBUG, "FILS: Decrypted Association Request elements", | |
2240 | pos, left - AES_BLOCK_SIZE); | |
2241 | ||
2242 | if (ieee802_11_parse_elems(pos, left - AES_BLOCK_SIZE, &elems, 1) == | |
2243 | ParseFailed) { | |
2244 | wpa_printf(MSG_DEBUG, | |
2245 | "FILS: Failed to parse decrypted elements"); | |
2246 | return -1; | |
2247 | } | |
2248 | if (!elems.fils_key_confirm) { | |
2249 | wpa_printf(MSG_DEBUG, "FILS: No FILS Key Confirm element"); | |
2250 | return -1; | |
2251 | } | |
2252 | if (elems.fils_key_confirm_len != sm->fils_key_auth_len) { | |
2253 | wpa_printf(MSG_DEBUG, | |
2254 | "FILS: Unexpected Key-Auth length %d (expected %d)", | |
2255 | elems.fils_key_confirm_len, | |
2256 | (int) sm->fils_key_auth_len); | |
2257 | return -1; | |
2258 | } | |
2259 | if (os_memcmp(elems.fils_key_confirm, sm->fils_key_auth_sta, | |
2260 | sm->fils_key_auth_len) != 0) { | |
2261 | wpa_printf(MSG_DEBUG, "FILS: Key-Auth mismatch"); | |
2262 | wpa_hexdump(MSG_DEBUG, "FILS: Received Key-Auth", | |
2263 | elems.fils_key_confirm, | |
2264 | elems.fils_key_confirm_len); | |
2265 | wpa_hexdump(MSG_DEBUG, "FILS: Expected Key-Auth", | |
2266 | sm->fils_key_auth_sta, sm->fils_key_auth_len); | |
2267 | return -1; | |
2268 | } | |
2269 | ||
2270 | return left - AES_BLOCK_SIZE; | |
2271 | } | |
2272 | ||
e73ffa09 JM |
2273 | |
2274 | int fils_encrypt_assoc(struct wpa_state_machine *sm, u8 *buf, | |
2275 | size_t current_len, size_t max_len) | |
2276 | { | |
2277 | u8 *end = buf + max_len; | |
2278 | u8 *pos = buf + current_len; | |
2279 | struct ieee80211_mgmt *mgmt; | |
2280 | struct wpabuf *plain; | |
2281 | u8 *len, *tmp, *tmp2; | |
2282 | u8 hdr[2]; | |
2283 | u8 *gtk, dummy_gtk[32]; | |
2284 | size_t gtk_len; | |
2285 | struct wpa_group *gsm; | |
2286 | const u8 *aad[5]; | |
2287 | size_t aad_len[5]; | |
2288 | ||
2289 | if (!sm || !sm->PTK_valid) | |
2290 | return -1; | |
2291 | ||
2292 | wpa_hexdump(MSG_DEBUG, | |
2293 | "FILS: Association Response frame before FILS processing", | |
2294 | buf, current_len); | |
2295 | ||
2296 | mgmt = (struct ieee80211_mgmt *) buf; | |
2297 | ||
2298 | /* AES-SIV AAD vectors */ | |
2299 | ||
2300 | /* The AP's BSSID */ | |
2301 | aad[0] = mgmt->sa; | |
2302 | aad_len[0] = ETH_ALEN; | |
2303 | /* The STA's MAC address */ | |
2304 | aad[1] = mgmt->da; | |
2305 | aad_len[1] = ETH_ALEN; | |
2306 | /* The AP's nonce */ | |
2307 | aad[2] = sm->ANonce; | |
2308 | aad_len[2] = FILS_NONCE_LEN; | |
2309 | /* The STA's nonce */ | |
2310 | aad[3] = sm->SNonce; | |
2311 | aad_len[3] = FILS_NONCE_LEN; | |
2312 | /* | |
2313 | * The (Re)Association Response frame from the Capability Information | |
2314 | * field (the same offset in both Association and Reassociation | |
2315 | * Response frames) to the FILS Session element (both inclusive). | |
2316 | */ | |
2317 | aad[4] = (const u8 *) &mgmt->u.assoc_resp.capab_info; | |
2318 | aad_len[4] = pos - aad[4]; | |
2319 | ||
2320 | /* The following elements will be encrypted with AES-SIV */ | |
2321 | ||
2322 | plain = wpabuf_alloc(1000); | |
2323 | if (!plain) | |
2324 | return -1; | |
2325 | ||
2326 | /* TODO: FILS Public Key */ | |
2327 | ||
2328 | /* FILS Key Confirmation */ | |
2329 | wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */ | |
2330 | wpabuf_put_u8(plain, 1 + sm->fils_key_auth_len); /* Length */ | |
2331 | /* Element ID Extension */ | |
2332 | wpabuf_put_u8(plain, WLAN_EID_EXT_FILS_KEY_CONFIRM); | |
2333 | wpabuf_put_data(plain, sm->fils_key_auth_ap, sm->fils_key_auth_len); | |
2334 | ||
2335 | /* TODO: FILS HLP Container */ | |
2336 | ||
2337 | /* TODO: FILS IP Address Assignment */ | |
2338 | ||
2339 | /* Key Delivery */ | |
2340 | gsm = sm->group; | |
2341 | wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */ | |
2342 | len = wpabuf_put(plain, 1); | |
2343 | wpabuf_put_u8(plain, WLAN_EID_EXT_KEY_DELIVERY); | |
2344 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, | |
2345 | wpabuf_put(plain, WPA_KEY_RSC_LEN)); | |
2346 | /* GTK KDE */ | |
2347 | gtk = gsm->GTK[gsm->GN - 1]; | |
2348 | gtk_len = gsm->GTK_len; | |
2349 | if (sm->wpa_auth->conf.disable_gtk) { | |
2350 | /* | |
2351 | * Provide unique random GTK to each STA to prevent use | |
2352 | * of GTK in the BSS. | |
2353 | */ | |
2354 | if (random_get_bytes(dummy_gtk, gtk_len) < 0) { | |
2355 | wpabuf_free(plain); | |
2356 | return -1; | |
2357 | } | |
2358 | gtk = dummy_gtk; | |
2359 | } | |
2360 | hdr[0] = gsm->GN & 0x03; | |
2361 | hdr[1] = 0; | |
2362 | tmp = wpabuf_put(plain, 0); | |
2363 | tmp2 = wpa_add_kde(tmp, RSN_KEY_DATA_GROUPKEY, hdr, 2, | |
2364 | gtk, gtk_len); | |
2365 | wpabuf_put(plain, tmp2 - tmp); | |
2366 | ||
2367 | /* IGTK KDE */ | |
2368 | tmp = wpabuf_put(plain, 0); | |
2369 | tmp2 = ieee80211w_kde_add(sm, tmp); | |
2370 | wpabuf_put(plain, tmp2 - tmp); | |
2371 | ||
2372 | *len = (u8 *) wpabuf_put(plain, 0) - len - 1; | |
2373 | ||
2374 | if (pos + wpabuf_len(plain) + AES_BLOCK_SIZE > end) { | |
2375 | wpa_printf(MSG_DEBUG, | |
2376 | "FILS: Not enough room for FILS elements"); | |
2377 | wpabuf_free(plain); | |
2378 | return -1; | |
2379 | } | |
2380 | ||
2381 | wpa_hexdump_buf_key(MSG_DEBUG, "FILS: Association Response plaintext", | |
2382 | plain); | |
2383 | ||
2384 | if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len, | |
2385 | wpabuf_head(plain), wpabuf_len(plain), | |
2386 | 5, aad, aad_len, pos) < 0) { | |
2387 | wpabuf_free(plain); | |
2388 | return -1; | |
2389 | } | |
2390 | ||
2391 | wpa_hexdump(MSG_DEBUG, | |
2392 | "FILS: Encrypted Association Response elements", | |
2393 | pos, AES_BLOCK_SIZE + wpabuf_len(plain)); | |
2394 | current_len += wpabuf_len(plain) + AES_BLOCK_SIZE; | |
2395 | wpabuf_free(plain); | |
2396 | ||
07e0117d JM |
2397 | sm->fils_completed = 1; |
2398 | ||
e73ffa09 JM |
2399 | return current_len; |
2400 | } | |
2401 | ||
da24c5aa JM |
2402 | |
2403 | int fils_set_tk(struct wpa_state_machine *sm) | |
2404 | { | |
2405 | enum wpa_alg alg; | |
2406 | int klen; | |
2407 | ||
2408 | if (!sm || !sm->PTK_valid) | |
2409 | return -1; | |
2410 | ||
2411 | alg = wpa_cipher_to_alg(sm->pairwise); | |
2412 | klen = wpa_cipher_key_len(sm->pairwise); | |
2413 | ||
2414 | wpa_printf(MSG_DEBUG, "FILS: Configure TK to the driver"); | |
2415 | if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0, | |
2416 | sm->PTK.tk, klen)) { | |
2417 | wpa_printf(MSG_DEBUG, "FILS: Failed to set TK to the driver"); | |
2418 | return -1; | |
2419 | } | |
2420 | ||
2421 | return 0; | |
2422 | } | |
2423 | ||
3b5b7aa8 JM |
2424 | #endif /* CONFIG_FILS */ |
2425 | ||
2426 | ||
6fc6879b JM |
2427 | SM_STATE(WPA_PTK, PTKCALCNEGOTIATING) |
2428 | { | |
3b5b7aa8 | 2429 | struct wpa_authenticator *wpa_auth = sm->wpa_auth; |
6fc6879b | 2430 | struct wpa_ptk PTK; |
2c502460 | 2431 | int ok = 0, psk_found = 0; |
6fc6879b | 2432 | const u8 *pmk = NULL; |
207976f0 | 2433 | unsigned int pmk_len; |
3b5b7aa8 JM |
2434 | int ft; |
2435 | const u8 *eapol_key_ie, *key_data, *mic; | |
2436 | u16 key_data_length; | |
2437 | size_t mic_len, eapol_key_ie_len; | |
2438 | struct ieee802_1x_hdr *hdr; | |
2439 | struct wpa_eapol_key *key; | |
2440 | struct wpa_eapol_ie_parse kde; | |
6fc6879b JM |
2441 | |
2442 | SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk); | |
2443 | sm->EAPOLKeyReceived = FALSE; | |
68921e24 | 2444 | sm->update_snonce = FALSE; |
b729fd8d | 2445 | os_memset(&PTK, 0, sizeof(PTK)); |
6fc6879b | 2446 | |
3b5b7aa8 JM |
2447 | mic_len = wpa_mic_len(sm->wpa_key_mgmt); |
2448 | ||
6fc6879b JM |
2449 | /* WPA with IEEE 802.1X: use the derived PMK from EAP |
2450 | * WPA-PSK: iterate through possible PSKs and select the one matching | |
2451 | * the packet */ | |
2452 | for (;;) { | |
56586197 | 2453 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) { |
759fd76b JM |
2454 | pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, |
2455 | sm->p2p_dev_addr, pmk); | |
6fc6879b JM |
2456 | if (pmk == NULL) |
2457 | break; | |
2c502460 | 2458 | psk_found = 1; |
207976f0 JM |
2459 | pmk_len = PMK_LEN; |
2460 | } else { | |
6fc6879b | 2461 | pmk = sm->PMK; |
207976f0 JM |
2462 | pmk_len = sm->pmk_len; |
2463 | } | |
6fc6879b | 2464 | |
207976f0 | 2465 | wpa_derive_ptk(sm, sm->SNonce, pmk, pmk_len, &PTK); |
6fc6879b | 2466 | |
3b5b7aa8 JM |
2467 | if (mic_len && |
2468 | wpa_verify_key_mic(sm->wpa_key_mgmt, &PTK, | |
929a2ea5 | 2469 | sm->last_rx_eapol_key, |
6fc6879b JM |
2470 | sm->last_rx_eapol_key_len) == 0) { |
2471 | ok = 1; | |
2472 | break; | |
2473 | } | |
2474 | ||
3b5b7aa8 | 2475 | #ifdef CONFIG_FILS |
75c8563e JM |
2476 | if (!mic_len && |
2477 | wpa_aead_decrypt(sm, &PTK, sm->last_rx_eapol_key, | |
2478 | sm->last_rx_eapol_key_len, NULL) == 0) { | |
3b5b7aa8 JM |
2479 | ok = 1; |
2480 | break; | |
2481 | } | |
2482 | #endif /* CONFIG_FILS */ | |
2483 | ||
56586197 | 2484 | if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) |
6fc6879b JM |
2485 | break; |
2486 | } | |
2487 | ||
2488 | if (!ok) { | |
2489 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
2490 | "invalid MIC in msg 2/4 of 4-Way Handshake"); | |
2c502460 JM |
2491 | if (psk_found) |
2492 | wpa_auth_psk_failure_report(sm->wpa_auth, sm->addr); | |
6fc6879b JM |
2493 | return; |
2494 | } | |
2495 | ||
3b5b7aa8 JM |
2496 | /* |
2497 | * Note: last_rx_eapol_key length fields have already been validated in | |
2498 | * wpa_receive(). | |
2499 | */ | |
2500 | hdr = (struct ieee802_1x_hdr *) sm->last_rx_eapol_key; | |
2501 | key = (struct wpa_eapol_key *) (hdr + 1); | |
2502 | mic = (u8 *) (key + 1); | |
2503 | key_data = mic + mic_len + 2; | |
2504 | key_data_length = WPA_GET_BE16(mic + mic_len); | |
2505 | if (key_data_length > sm->last_rx_eapol_key_len - sizeof(*hdr) - | |
2506 | sizeof(*key) - mic_len - 2) | |
2507 | return; | |
2508 | ||
2509 | if (wpa_parse_kde_ies(key_data, key_data_length, &kde) < 0) { | |
2510 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
2511 | "received EAPOL-Key msg 2/4 with invalid Key Data contents"); | |
2512 | return; | |
2513 | } | |
2514 | if (kde.rsn_ie) { | |
2515 | eapol_key_ie = kde.rsn_ie; | |
2516 | eapol_key_ie_len = kde.rsn_ie_len; | |
2517 | } else if (kde.osen) { | |
2518 | eapol_key_ie = kde.osen; | |
2519 | eapol_key_ie_len = kde.osen_len; | |
2520 | } else { | |
2521 | eapol_key_ie = kde.wpa_ie; | |
2522 | eapol_key_ie_len = kde.wpa_ie_len; | |
2523 | } | |
2524 | ft = sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt); | |
2525 | if (sm->wpa_ie == NULL || | |
2526 | wpa_compare_rsn_ie(ft, sm->wpa_ie, sm->wpa_ie_len, | |
2527 | eapol_key_ie, eapol_key_ie_len)) { | |
2528 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
2529 | "WPA IE from (Re)AssocReq did not match with msg 2/4"); | |
2530 | if (sm->wpa_ie) { | |
2531 | wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq", | |
2532 | sm->wpa_ie, sm->wpa_ie_len); | |
2533 | } | |
2534 | wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4", | |
2535 | eapol_key_ie, eapol_key_ie_len); | |
2536 | /* MLME-DEAUTHENTICATE.request */ | |
2537 | wpa_sta_disconnect(wpa_auth, sm->addr); | |
2538 | return; | |
2539 | } | |
4ec1fd8e | 2540 | #ifdef CONFIG_IEEE80211R_AP |
3b5b7aa8 JM |
2541 | if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) { |
2542 | wpa_sta_disconnect(wpa_auth, sm->addr); | |
2543 | return; | |
2544 | } | |
4ec1fd8e | 2545 | #endif /* CONFIG_IEEE80211R_AP */ |
3b5b7aa8 JM |
2546 | #ifdef CONFIG_P2P |
2547 | if (kde.ip_addr_req && kde.ip_addr_req[0] && | |
2548 | wpa_auth->ip_pool && WPA_GET_BE32(sm->ip_addr) == 0) { | |
2549 | int idx; | |
2550 | wpa_printf(MSG_DEBUG, | |
2551 | "P2P: IP address requested in EAPOL-Key exchange"); | |
2552 | idx = bitfield_get_first_zero(wpa_auth->ip_pool); | |
2553 | if (idx >= 0) { | |
2554 | u32 start = WPA_GET_BE32(wpa_auth->conf.ip_addr_start); | |
2555 | bitfield_set(wpa_auth->ip_pool, idx); | |
2556 | WPA_PUT_BE32(sm->ip_addr, start + idx); | |
2557 | wpa_printf(MSG_DEBUG, | |
2558 | "P2P: Assigned IP address %u.%u.%u.%u to " | |
2559 | MACSTR, sm->ip_addr[0], sm->ip_addr[1], | |
2560 | sm->ip_addr[2], sm->ip_addr[3], | |
2561 | MAC2STR(sm->addr)); | |
2562 | } | |
2563 | } | |
2564 | #endif /* CONFIG_P2P */ | |
2565 | ||
4ec1fd8e | 2566 | #ifdef CONFIG_IEEE80211R_AP |
26e23750 JM |
2567 | if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { |
2568 | /* | |
2569 | * Verify that PMKR1Name from EAPOL-Key message 2/4 matches | |
2570 | * with the value we derived. | |
2571 | */ | |
870834a1 JM |
2572 | if (os_memcmp_const(sm->sup_pmk_r1_name, sm->pmk_r1_name, |
2573 | WPA_PMK_NAME_LEN) != 0) { | |
26e23750 JM |
2574 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, |
2575 | "PMKR1Name mismatch in FT 4-way " | |
2576 | "handshake"); | |
2577 | wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from " | |
2578 | "Supplicant", | |
2579 | sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN); | |
2580 | wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name", | |
2581 | sm->pmk_r1_name, WPA_PMK_NAME_LEN); | |
2582 | return; | |
2583 | } | |
2584 | } | |
4ec1fd8e | 2585 | #endif /* CONFIG_IEEE80211R_AP */ |
26e23750 | 2586 | |
e4bf4db9 | 2587 | sm->pending_1_of_4_timeout = 0; |
6fc6879b JM |
2588 | eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm); |
2589 | ||
56586197 | 2590 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) { |
6fc6879b JM |
2591 | /* PSK may have changed from the previous choice, so update |
2592 | * state machine data based on whatever PSK was selected here. | |
2593 | */ | |
2594 | os_memcpy(sm->PMK, pmk, PMK_LEN); | |
207976f0 | 2595 | sm->pmk_len = PMK_LEN; |
6fc6879b JM |
2596 | } |
2597 | ||
2598 | sm->MICVerified = TRUE; | |
2599 | ||
2600 | os_memcpy(&sm->PTK, &PTK, sizeof(PTK)); | |
2601 | sm->PTK_valid = TRUE; | |
2602 | } | |
2603 | ||
2604 | ||
2605 | SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2) | |
2606 | { | |
2607 | SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk); | |
2608 | sm->TimeoutCtr = 0; | |
2609 | } | |
2610 | ||
2611 | ||
2612 | #ifdef CONFIG_IEEE80211W | |
2613 | ||
2614 | static int ieee80211w_kde_len(struct wpa_state_machine *sm) | |
2615 | { | |
2616 | if (sm->mgmt_frame_prot) { | |
8dd9f9cd JM |
2617 | size_t len; |
2618 | len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher); | |
2619 | return 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN + len; | |
6fc6879b JM |
2620 | } |
2621 | ||
2622 | return 0; | |
2623 | } | |
2624 | ||
2625 | ||
2626 | static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos) | |
2627 | { | |
2628 | struct wpa_igtk_kde igtk; | |
2629 | struct wpa_group *gsm = sm->group; | |
03610ad2 | 2630 | u8 rsc[WPA_KEY_RSC_LEN]; |
8dd9f9cd | 2631 | size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher); |
6fc6879b JM |
2632 | |
2633 | if (!sm->mgmt_frame_prot) | |
2634 | return pos; | |
2635 | ||
2636 | igtk.keyid[0] = gsm->GN_igtk; | |
2637 | igtk.keyid[1] = 0; | |
7b1080da | 2638 | if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE || |
03610ad2 | 2639 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, rsc) < 0) |
6fc6879b | 2640 | os_memset(igtk.pn, 0, sizeof(igtk.pn)); |
03610ad2 JM |
2641 | else |
2642 | os_memcpy(igtk.pn, rsc, sizeof(igtk.pn)); | |
8dd9f9cd | 2643 | os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], len); |
83421850 JM |
2644 | if (sm->wpa_auth->conf.disable_gtk) { |
2645 | /* | |
2646 | * Provide unique random IGTK to each STA to prevent use of | |
2647 | * IGTK in the BSS. | |
2648 | */ | |
8dd9f9cd | 2649 | if (random_get_bytes(igtk.igtk, len) < 0) |
83421850 JM |
2650 | return pos; |
2651 | } | |
6fc6879b | 2652 | pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK, |
8dd9f9cd JM |
2653 | (const u8 *) &igtk, WPA_IGTK_KDE_PREFIX_LEN + len, |
2654 | NULL, 0); | |
6fc6879b JM |
2655 | |
2656 | return pos; | |
2657 | } | |
2658 | ||
2659 | #else /* CONFIG_IEEE80211W */ | |
2660 | ||
2661 | static int ieee80211w_kde_len(struct wpa_state_machine *sm) | |
2662 | { | |
2663 | return 0; | |
2664 | } | |
2665 | ||
2666 | ||
2667 | static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos) | |
2668 | { | |
2669 | return pos; | |
2670 | } | |
2671 | ||
2672 | #endif /* CONFIG_IEEE80211W */ | |
2673 | ||
2674 | ||
2675 | SM_STATE(WPA_PTK, PTKINITNEGOTIATING) | |
2676 | { | |
83421850 | 2677 | u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos, dummy_gtk[32]; |
6fc6879b JM |
2678 | size_t gtk_len, kde_len; |
2679 | struct wpa_group *gsm = sm->group; | |
2680 | u8 *wpa_ie; | |
2681 | int wpa_ie_len, secure, keyidx, encr = 0; | |
2682 | ||
2683 | SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk); | |
2684 | sm->TimeoutEvt = FALSE; | |
bae61562 JM |
2685 | |
2686 | sm->TimeoutCtr++; | |
2687 | if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) { | |
2688 | /* No point in sending the EAPOL-Key - we will disconnect | |
2689 | * immediately following this. */ | |
2690 | return; | |
2691 | } | |
2692 | ||
86dfabb8 JM |
2693 | /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE], |
2694 | GTK[GN], IGTK, [FTIE], [TIE * 2]) | |
6fc6879b JM |
2695 | */ |
2696 | os_memset(rsc, 0, WPA_KEY_RSC_LEN); | |
2697 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc); | |
86dfabb8 | 2698 | /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */ |
6fc6879b JM |
2699 | wpa_ie = sm->wpa_auth->wpa_ie; |
2700 | wpa_ie_len = sm->wpa_auth->wpa_ie_len; | |
2701 | if (sm->wpa == WPA_VERSION_WPA && | |
2702 | (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) && | |
2703 | wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) { | |
774d4145 | 2704 | /* WPA-only STA, remove RSN IE and possible MDIE */ |
6fc6879b | 2705 | wpa_ie = wpa_ie + wpa_ie[1] + 2; |
774d4145 JM |
2706 | if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN) |
2707 | wpa_ie = wpa_ie + wpa_ie[1] + 2; | |
6fc6879b JM |
2708 | wpa_ie_len = wpa_ie[1] + 2; |
2709 | } | |
2710 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
2711 | "sending 3/4 msg of 4-Way Handshake"); | |
2712 | if (sm->wpa == WPA_VERSION_WPA2) { | |
2713 | /* WPA2 send GTK in the 4-way handshake */ | |
2714 | secure = 1; | |
2715 | gtk = gsm->GTK[gsm->GN - 1]; | |
2716 | gtk_len = gsm->GTK_len; | |
83421850 JM |
2717 | if (sm->wpa_auth->conf.disable_gtk) { |
2718 | /* | |
2719 | * Provide unique random GTK to each STA to prevent use | |
2720 | * of GTK in the BSS. | |
2721 | */ | |
2722 | if (random_get_bytes(dummy_gtk, gtk_len) < 0) | |
2723 | return; | |
2724 | gtk = dummy_gtk; | |
2725 | } | |
6fc6879b JM |
2726 | keyidx = gsm->GN; |
2727 | _rsc = rsc; | |
2728 | encr = 1; | |
2729 | } else { | |
2730 | /* WPA does not include GTK in msg 3/4 */ | |
2731 | secure = 0; | |
2732 | gtk = NULL; | |
2733 | gtk_len = 0; | |
2734 | keyidx = 0; | |
2735 | _rsc = NULL; | |
0d442aff JM |
2736 | if (sm->rx_eapol_key_secure) { |
2737 | /* | |
2738 | * It looks like Windows 7 supplicant tries to use | |
2739 | * Secure bit in msg 2/4 after having reported Michael | |
2740 | * MIC failure and it then rejects the 4-way handshake | |
2741 | * if msg 3/4 does not set Secure bit. Work around this | |
2742 | * by setting the Secure bit here even in the case of | |
2743 | * WPA if the supplicant used it first. | |
2744 | */ | |
2745 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
4740d5b9 JM |
2746 | "STA used Secure bit in WPA msg 2/4 - " |
2747 | "set Secure for 3/4 as workaround"); | |
0d442aff JM |
2748 | secure = 1; |
2749 | } | |
6fc6879b JM |
2750 | } |
2751 | ||
2752 | kde_len = wpa_ie_len + ieee80211w_kde_len(sm); | |
2753 | if (gtk) | |
2754 | kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len; | |
4ec1fd8e | 2755 | #ifdef CONFIG_IEEE80211R_AP |
86dfabb8 JM |
2756 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { |
2757 | kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */ | |
2758 | kde_len += 300; /* FTIE + 2 * TIE */ | |
2759 | } | |
4ec1fd8e | 2760 | #endif /* CONFIG_IEEE80211R_AP */ |
25ef8529 JM |
2761 | #ifdef CONFIG_P2P |
2762 | if (WPA_GET_BE32(sm->ip_addr) > 0) | |
2763 | kde_len += 2 + RSN_SELECTOR_LEN + 3 * 4; | |
2764 | #endif /* CONFIG_P2P */ | |
6fc6879b JM |
2765 | kde = os_malloc(kde_len); |
2766 | if (kde == NULL) | |
2767 | return; | |
2768 | ||
2769 | pos = kde; | |
2770 | os_memcpy(pos, wpa_ie, wpa_ie_len); | |
2771 | pos += wpa_ie_len; | |
4ec1fd8e | 2772 | #ifdef CONFIG_IEEE80211R_AP |
26e23750 | 2773 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { |
59e78c24 JM |
2774 | int res; |
2775 | size_t elen; | |
2776 | ||
2777 | elen = pos - kde; | |
2778 | res = wpa_insert_pmkid(kde, &elen, sm->pmk_r1_name); | |
26e23750 JM |
2779 | if (res < 0) { |
2780 | wpa_printf(MSG_ERROR, "FT: Failed to insert " | |
2781 | "PMKR1Name into RSN IE in EAPOL-Key data"); | |
2782 | os_free(kde); | |
2783 | return; | |
2784 | } | |
59e78c24 JM |
2785 | pos -= wpa_ie_len; |
2786 | pos += elen; | |
26e23750 | 2787 | } |
4ec1fd8e | 2788 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b JM |
2789 | if (gtk) { |
2790 | u8 hdr[2]; | |
2791 | hdr[0] = keyidx & 0x03; | |
2792 | hdr[1] = 0; | |
2793 | pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2, | |
2794 | gtk, gtk_len); | |
2795 | } | |
2796 | pos = ieee80211w_kde_add(sm, pos); | |
2797 | ||
4ec1fd8e | 2798 | #ifdef CONFIG_IEEE80211R_AP |
86dfabb8 JM |
2799 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { |
2800 | int res; | |
2801 | struct wpa_auth_config *conf; | |
2802 | ||
2803 | conf = &sm->wpa_auth->conf; | |
9257610a JM |
2804 | if (sm->assoc_resp_ftie && |
2805 | kde + kde_len - pos >= 2 + sm->assoc_resp_ftie[1]) { | |
2806 | os_memcpy(pos, sm->assoc_resp_ftie, | |
2807 | 2 + sm->assoc_resp_ftie[1]); | |
2808 | res = 2 + sm->assoc_resp_ftie[1]; | |
2809 | } else { | |
2810 | res = wpa_write_ftie(conf, conf->r0_key_holder, | |
2811 | conf->r0_key_holder_len, | |
2812 | NULL, NULL, pos, | |
2813 | kde + kde_len - pos, | |
2814 | NULL, 0); | |
2815 | } | |
86dfabb8 JM |
2816 | if (res < 0) { |
2817 | wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE " | |
2818 | "into EAPOL-Key Key Data"); | |
2819 | os_free(kde); | |
2820 | return; | |
2821 | } | |
2822 | pos += res; | |
2823 | ||
2824 | /* TIE[ReassociationDeadline] (TU) */ | |
2825 | *pos++ = WLAN_EID_TIMEOUT_INTERVAL; | |
2826 | *pos++ = 5; | |
2827 | *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE; | |
2828 | WPA_PUT_LE32(pos, conf->reassociation_deadline); | |
2829 | pos += 4; | |
2830 | ||
2831 | /* TIE[KeyLifetime] (seconds) */ | |
2832 | *pos++ = WLAN_EID_TIMEOUT_INTERVAL; | |
2833 | *pos++ = 5; | |
2834 | *pos++ = WLAN_TIMEOUT_KEY_LIFETIME; | |
2835 | WPA_PUT_LE32(pos, conf->r0_key_lifetime * 60); | |
2836 | pos += 4; | |
2837 | } | |
4ec1fd8e | 2838 | #endif /* CONFIG_IEEE80211R_AP */ |
25ef8529 JM |
2839 | #ifdef CONFIG_P2P |
2840 | if (WPA_GET_BE32(sm->ip_addr) > 0) { | |
2841 | u8 addr[3 * 4]; | |
2842 | os_memcpy(addr, sm->ip_addr, 4); | |
2843 | os_memcpy(addr + 4, sm->wpa_auth->conf.ip_addr_mask, 4); | |
2844 | os_memcpy(addr + 8, sm->wpa_auth->conf.ip_addr_go, 4); | |
2845 | pos = wpa_add_kde(pos, WFA_KEY_DATA_IP_ADDR_ALLOC, | |
2846 | addr, sizeof(addr), NULL, 0); | |
2847 | } | |
2848 | #endif /* CONFIG_P2P */ | |
86dfabb8 | 2849 | |
6fc6879b | 2850 | wpa_send_eapol(sm->wpa_auth, sm, |
b729fd8d JM |
2851 | (secure ? WPA_KEY_INFO_SECURE : 0) | |
2852 | (wpa_mic_len(sm->wpa_key_mgmt) ? WPA_KEY_INFO_MIC : 0) | | |
6fc6879b JM |
2853 | WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL | |
2854 | WPA_KEY_INFO_KEY_TYPE, | |
2855 | _rsc, sm->ANonce, kde, pos - kde, keyidx, encr); | |
2856 | os_free(kde); | |
6fc6879b JM |
2857 | } |
2858 | ||
2859 | ||
2860 | SM_STATE(WPA_PTK, PTKINITDONE) | |
2861 | { | |
2862 | SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk); | |
2863 | sm->EAPOLKeyReceived = FALSE; | |
2864 | if (sm->Pair) { | |
c3550295 JM |
2865 | enum wpa_alg alg = wpa_cipher_to_alg(sm->pairwise); |
2866 | int klen = wpa_cipher_key_len(sm->pairwise); | |
6fc6879b | 2867 | if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0, |
98cd3d1c | 2868 | sm->PTK.tk, klen)) { |
6fc6879b JM |
2869 | wpa_sta_disconnect(sm->wpa_auth, sm->addr); |
2870 | return; | |
2871 | } | |
2872 | /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */ | |
2873 | sm->pairwise_set = TRUE; | |
2874 | ||
581a8cde JM |
2875 | if (sm->wpa_auth->conf.wpa_ptk_rekey) { |
2876 | eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm); | |
2877 | eloop_register_timeout(sm->wpa_auth->conf. | |
2878 | wpa_ptk_rekey, 0, wpa_rekey_ptk, | |
2879 | sm->wpa_auth, sm); | |
2880 | } | |
2881 | ||
56586197 | 2882 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) { |
6fc6879b JM |
2883 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, |
2884 | WPA_EAPOL_authorized, 1); | |
2885 | } | |
2886 | } | |
2887 | ||
2888 | if (0 /* IBSS == TRUE */) { | |
2889 | sm->keycount++; | |
2890 | if (sm->keycount == 2) { | |
2891 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, | |
2892 | WPA_EAPOL_portValid, 1); | |
2893 | } | |
2894 | } else { | |
2895 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, | |
2896 | 1); | |
2897 | } | |
2898 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0); | |
2899 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1); | |
2900 | if (sm->wpa == WPA_VERSION_WPA) | |
2901 | sm->PInitAKeys = TRUE; | |
2902 | else | |
2903 | sm->has_GTK = TRUE; | |
2904 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO, | |
2905 | "pairwise key handshake completed (%s)", | |
2906 | sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN"); | |
2907 | ||
4ec1fd8e | 2908 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b | 2909 | wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr); |
4ec1fd8e | 2910 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b JM |
2911 | } |
2912 | ||
2913 | ||
2914 | SM_STEP(WPA_PTK) | |
2915 | { | |
2916 | struct wpa_authenticator *wpa_auth = sm->wpa_auth; | |
2917 | ||
2918 | if (sm->Init) | |
2919 | SM_ENTER(WPA_PTK, INITIALIZE); | |
2920 | else if (sm->Disconnect | |
1aae01fc BG |
2921 | /* || FIX: dot11RSNAConfigSALifetime timeout */) { |
2922 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
2923 | "WPA_PTK: sm->Disconnect"); | |
6fc6879b | 2924 | SM_ENTER(WPA_PTK, DISCONNECT); |
1aae01fc | 2925 | } |
6fc6879b JM |
2926 | else if (sm->DeauthenticationRequest) |
2927 | SM_ENTER(WPA_PTK, DISCONNECTED); | |
2928 | else if (sm->AuthenticationRequest) | |
2929 | SM_ENTER(WPA_PTK, AUTHENTICATION); | |
2930 | else if (sm->ReAuthenticationRequest) | |
2931 | SM_ENTER(WPA_PTK, AUTHENTICATION2); | |
2932 | else if (sm->PTKRequest) | |
2933 | SM_ENTER(WPA_PTK, PTKSTART); | |
2934 | else switch (sm->wpa_ptk_state) { | |
2935 | case WPA_PTK_INITIALIZE: | |
2936 | break; | |
2937 | case WPA_PTK_DISCONNECT: | |
2938 | SM_ENTER(WPA_PTK, DISCONNECTED); | |
2939 | break; | |
2940 | case WPA_PTK_DISCONNECTED: | |
2941 | SM_ENTER(WPA_PTK, INITIALIZE); | |
2942 | break; | |
2943 | case WPA_PTK_AUTHENTICATION: | |
2944 | SM_ENTER(WPA_PTK, AUTHENTICATION2); | |
2945 | break; | |
2946 | case WPA_PTK_AUTHENTICATION2: | |
56586197 | 2947 | if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) && |
6fc6879b JM |
2948 | wpa_auth_get_eapol(sm->wpa_auth, sm->addr, |
2949 | WPA_EAPOL_keyRun) > 0) | |
2950 | SM_ENTER(WPA_PTK, INITPMK); | |
56586197 | 2951 | else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) |
6fc6879b JM |
2952 | /* FIX: && 802.1X::keyRun */) |
2953 | SM_ENTER(WPA_PTK, INITPSK); | |
2954 | break; | |
2955 | case WPA_PTK_INITPMK: | |
2956 | if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr, | |
2957 | WPA_EAPOL_keyAvailable) > 0) | |
2958 | SM_ENTER(WPA_PTK, PTKSTART); | |
2959 | else { | |
2960 | wpa_auth->dot11RSNA4WayHandshakeFailures++; | |
1aae01fc BG |
2961 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO, |
2962 | "INITPMK - keyAvailable = false"); | |
6fc6879b JM |
2963 | SM_ENTER(WPA_PTK, DISCONNECT); |
2964 | } | |
2965 | break; | |
2966 | case WPA_PTK_INITPSK: | |
759fd76b JM |
2967 | if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr, |
2968 | NULL)) | |
6fc6879b JM |
2969 | SM_ENTER(WPA_PTK, PTKSTART); |
2970 | else { | |
2971 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO, | |
2972 | "no PSK configured for the STA"); | |
2973 | wpa_auth->dot11RSNA4WayHandshakeFailures++; | |
2974 | SM_ENTER(WPA_PTK, DISCONNECT); | |
2975 | } | |
2976 | break; | |
2977 | case WPA_PTK_PTKSTART: | |
2978 | if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest && | |
2979 | sm->EAPOLKeyPairwise) | |
2980 | SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING); | |
2981 | else if (sm->TimeoutCtr > | |
2982 | (int) dot11RSNAConfigPairwiseUpdateCount) { | |
2983 | wpa_auth->dot11RSNA4WayHandshakeFailures++; | |
1aae01fc BG |
2984 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, |
2985 | "PTKSTART: Retry limit %d reached", | |
2986 | dot11RSNAConfigPairwiseUpdateCount); | |
6fc6879b JM |
2987 | SM_ENTER(WPA_PTK, DISCONNECT); |
2988 | } else if (sm->TimeoutEvt) | |
2989 | SM_ENTER(WPA_PTK, PTKSTART); | |
2990 | break; | |
2991 | case WPA_PTK_PTKCALCNEGOTIATING: | |
2992 | if (sm->MICVerified) | |
2993 | SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2); | |
2994 | else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest && | |
2995 | sm->EAPOLKeyPairwise) | |
2996 | SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING); | |
2997 | else if (sm->TimeoutEvt) | |
2998 | SM_ENTER(WPA_PTK, PTKSTART); | |
2999 | break; | |
3000 | case WPA_PTK_PTKCALCNEGOTIATING2: | |
3001 | SM_ENTER(WPA_PTK, PTKINITNEGOTIATING); | |
3002 | break; | |
3003 | case WPA_PTK_PTKINITNEGOTIATING: | |
68921e24 JM |
3004 | if (sm->update_snonce) |
3005 | SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING); | |
3006 | else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest && | |
3007 | sm->EAPOLKeyPairwise && sm->MICVerified) | |
6fc6879b JM |
3008 | SM_ENTER(WPA_PTK, PTKINITDONE); |
3009 | else if (sm->TimeoutCtr > | |
3010 | (int) dot11RSNAConfigPairwiseUpdateCount) { | |
3011 | wpa_auth->dot11RSNA4WayHandshakeFailures++; | |
1aae01fc BG |
3012 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, |
3013 | "PTKINITNEGOTIATING: Retry limit %d " | |
3014 | "reached", | |
3015 | dot11RSNAConfigPairwiseUpdateCount); | |
6fc6879b JM |
3016 | SM_ENTER(WPA_PTK, DISCONNECT); |
3017 | } else if (sm->TimeoutEvt) | |
3018 | SM_ENTER(WPA_PTK, PTKINITNEGOTIATING); | |
3019 | break; | |
3020 | case WPA_PTK_PTKINITDONE: | |
3021 | break; | |
3022 | } | |
3023 | } | |
3024 | ||
3025 | ||
3026 | SM_STATE(WPA_PTK_GROUP, IDLE) | |
3027 | { | |
3028 | SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group); | |
3029 | if (sm->Init) { | |
3030 | /* Init flag is not cleared here, so avoid busy | |
3031 | * loop by claiming nothing changed. */ | |
3032 | sm->changed = FALSE; | |
3033 | } | |
3034 | sm->GTimeoutCtr = 0; | |
3035 | } | |
3036 | ||
3037 | ||
3038 | SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING) | |
3039 | { | |
3040 | u8 rsc[WPA_KEY_RSC_LEN]; | |
3041 | struct wpa_group *gsm = sm->group; | |
e41e4f9e JM |
3042 | const u8 *kde; |
3043 | u8 *kde_buf = NULL, *pos, hdr[2]; | |
6fc6879b | 3044 | size_t kde_len; |
83421850 | 3045 | u8 *gtk, dummy_gtk[32]; |
6fc6879b JM |
3046 | |
3047 | SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group); | |
bae61562 JM |
3048 | |
3049 | sm->GTimeoutCtr++; | |
3050 | if (sm->GTimeoutCtr > (int) dot11RSNAConfigGroupUpdateCount) { | |
3051 | /* No point in sending the EAPOL-Key - we will disconnect | |
3052 | * immediately following this. */ | |
3053 | return; | |
3054 | } | |
3055 | ||
6fc6879b JM |
3056 | if (sm->wpa == WPA_VERSION_WPA) |
3057 | sm->PInitAKeys = FALSE; | |
3058 | sm->TimeoutEvt = FALSE; | |
3059 | /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */ | |
3060 | os_memset(rsc, 0, WPA_KEY_RSC_LEN); | |
3061 | if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE) | |
3062 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc); | |
3063 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
3064 | "sending 1/2 msg of Group Key Handshake"); | |
3065 | ||
83421850 JM |
3066 | gtk = gsm->GTK[gsm->GN - 1]; |
3067 | if (sm->wpa_auth->conf.disable_gtk) { | |
3068 | /* | |
3069 | * Provide unique random GTK to each STA to prevent use | |
3070 | * of GTK in the BSS. | |
3071 | */ | |
3072 | if (random_get_bytes(dummy_gtk, gsm->GTK_len) < 0) | |
3073 | return; | |
3074 | gtk = dummy_gtk; | |
3075 | } | |
6fc6879b JM |
3076 | if (sm->wpa == WPA_VERSION_WPA2) { |
3077 | kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len + | |
3078 | ieee80211w_kde_len(sm); | |
e41e4f9e JM |
3079 | kde_buf = os_malloc(kde_len); |
3080 | if (kde_buf == NULL) | |
6fc6879b JM |
3081 | return; |
3082 | ||
e41e4f9e | 3083 | kde = pos = kde_buf; |
6fc6879b JM |
3084 | hdr[0] = gsm->GN & 0x03; |
3085 | hdr[1] = 0; | |
3086 | pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2, | |
83421850 | 3087 | gtk, gsm->GTK_len); |
6fc6879b | 3088 | pos = ieee80211w_kde_add(sm, pos); |
e41e4f9e | 3089 | kde_len = pos - kde; |
6fc6879b | 3090 | } else { |
83421850 | 3091 | kde = gtk; |
e41e4f9e | 3092 | kde_len = gsm->GTK_len; |
6fc6879b JM |
3093 | } |
3094 | ||
3095 | wpa_send_eapol(sm->wpa_auth, sm, | |
b729fd8d JM |
3096 | WPA_KEY_INFO_SECURE | |
3097 | (wpa_mic_len(sm->wpa_key_mgmt) ? WPA_KEY_INFO_MIC : 0) | | |
6fc6879b JM |
3098 | WPA_KEY_INFO_ACK | |
3099 | (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0), | |
e41e4f9e JM |
3100 | rsc, gsm->GNonce, kde, kde_len, gsm->GN, 1); |
3101 | ||
3102 | os_free(kde_buf); | |
6fc6879b JM |
3103 | } |
3104 | ||
3105 | ||
3106 | SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED) | |
3107 | { | |
3108 | SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group); | |
3109 | sm->EAPOLKeyReceived = FALSE; | |
3110 | if (sm->GUpdateStationKeys) | |
3111 | sm->group->GKeyDoneStations--; | |
3112 | sm->GUpdateStationKeys = FALSE; | |
3113 | sm->GTimeoutCtr = 0; | |
3114 | /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */ | |
3115 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO, | |
3116 | "group key handshake completed (%s)", | |
3117 | sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN"); | |
3118 | sm->has_GTK = TRUE; | |
3119 | } | |
3120 | ||
3121 | ||
3122 | SM_STATE(WPA_PTK_GROUP, KEYERROR) | |
3123 | { | |
3124 | SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group); | |
3125 | if (sm->GUpdateStationKeys) | |
3126 | sm->group->GKeyDoneStations--; | |
3127 | sm->GUpdateStationKeys = FALSE; | |
3128 | sm->Disconnect = TRUE; | |
3129 | } | |
3130 | ||
3131 | ||
3132 | SM_STEP(WPA_PTK_GROUP) | |
3133 | { | |
9663596f | 3134 | if (sm->Init || sm->PtkGroupInit) { |
6fc6879b | 3135 | SM_ENTER(WPA_PTK_GROUP, IDLE); |
9663596f JM |
3136 | sm->PtkGroupInit = FALSE; |
3137 | } else switch (sm->wpa_ptk_group_state) { | |
6fc6879b JM |
3138 | case WPA_PTK_GROUP_IDLE: |
3139 | if (sm->GUpdateStationKeys || | |
3140 | (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys)) | |
3141 | SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING); | |
3142 | break; | |
3143 | case WPA_PTK_GROUP_REKEYNEGOTIATING: | |
3144 | if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest && | |
3145 | !sm->EAPOLKeyPairwise && sm->MICVerified) | |
3146 | SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED); | |
3147 | else if (sm->GTimeoutCtr > | |
3148 | (int) dot11RSNAConfigGroupUpdateCount) | |
3149 | SM_ENTER(WPA_PTK_GROUP, KEYERROR); | |
3150 | else if (sm->TimeoutEvt) | |
3151 | SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING); | |
3152 | break; | |
3153 | case WPA_PTK_GROUP_KEYERROR: | |
3154 | SM_ENTER(WPA_PTK_GROUP, IDLE); | |
3155 | break; | |
3156 | case WPA_PTK_GROUP_REKEYESTABLISHED: | |
3157 | SM_ENTER(WPA_PTK_GROUP, IDLE); | |
3158 | break; | |
3159 | } | |
3160 | } | |
3161 | ||
3162 | ||
3163 | static int wpa_gtk_update(struct wpa_authenticator *wpa_auth, | |
3164 | struct wpa_group *group) | |
3165 | { | |
3166 | int ret = 0; | |
3167 | ||
6fc6879b JM |
3168 | os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN); |
3169 | inc_byte_array(group->Counter, WPA_NONCE_LEN); | |
3c7302c2 JM |
3170 | if (wpa_gmk_to_gtk(group->GMK, "Group key expansion", |
3171 | wpa_auth->addr, group->GNonce, | |
3172 | group->GTK[group->GN - 1], group->GTK_len) < 0) | |
3173 | ret = -1; | |
5cb9d5c3 JM |
3174 | wpa_hexdump_key(MSG_DEBUG, "GTK", |
3175 | group->GTK[group->GN - 1], group->GTK_len); | |
6fc6879b JM |
3176 | |
3177 | #ifdef CONFIG_IEEE80211W | |
70f8cc8e | 3178 | if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) { |
8dd9f9cd JM |
3179 | size_t len; |
3180 | len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher); | |
5cb9d5c3 JM |
3181 | os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN); |
3182 | inc_byte_array(group->Counter, WPA_NONCE_LEN); | |
3c7302c2 JM |
3183 | if (wpa_gmk_to_gtk(group->GMK, "IGTK key expansion", |
3184 | wpa_auth->addr, group->GNonce, | |
8dd9f9cd | 3185 | group->IGTK[group->GN_igtk - 4], len) < 0) |
3c7302c2 | 3186 | ret = -1; |
6fc6879b | 3187 | wpa_hexdump_key(MSG_DEBUG, "IGTK", |
8dd9f9cd | 3188 | group->IGTK[group->GN_igtk - 4], len); |
6fc6879b JM |
3189 | } |
3190 | #endif /* CONFIG_IEEE80211W */ | |
3191 | ||
3192 | return ret; | |
3193 | } | |
3194 | ||
3195 | ||
3196 | static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth, | |
3197 | struct wpa_group *group) | |
3198 | { | |
3199 | wpa_printf(MSG_DEBUG, "WPA: group state machine entering state " | |
3200 | "GTK_INIT (VLAN-ID %d)", group->vlan_id); | |
3201 | group->changed = FALSE; /* GInit is not cleared here; avoid loop */ | |
3202 | group->wpa_group_state = WPA_GROUP_GTK_INIT; | |
3203 | ||
3204 | /* GTK[0..N] = 0 */ | |
3205 | os_memset(group->GTK, 0, sizeof(group->GTK)); | |
3206 | group->GN = 1; | |
3207 | group->GM = 2; | |
3208 | #ifdef CONFIG_IEEE80211W | |
3209 | group->GN_igtk = 4; | |
3210 | group->GM_igtk = 5; | |
3211 | #endif /* CONFIG_IEEE80211W */ | |
3212 | /* GTK[GN] = CalcGTK() */ | |
3213 | wpa_gtk_update(wpa_auth, group); | |
3214 | } | |
3215 | ||
3216 | ||
3217 | static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx) | |
3218 | { | |
473b6f22 MB |
3219 | if (ctx != NULL && ctx != sm->group) |
3220 | return 0; | |
3221 | ||
6fc6879b JM |
3222 | if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) { |
3223 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
3224 | "Not in PTKINITDONE; skip Group Key update"); | |
3c183894 | 3225 | sm->GUpdateStationKeys = FALSE; |
6fc6879b JM |
3226 | return 0; |
3227 | } | |
9663596f JM |
3228 | if (sm->GUpdateStationKeys) { |
3229 | /* | |
3c183894 JM |
3230 | * This should not really happen, so add a debug log entry. |
3231 | * Since we clear the GKeyDoneStations before the loop, the | |
3232 | * station needs to be counted here anyway. | |
9663596f JM |
3233 | */ |
3234 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
3c183894 JM |
3235 | "GUpdateStationKeys was already set when " |
3236 | "marking station for GTK rekeying"); | |
9663596f | 3237 | } |
3c183894 | 3238 | |
ad3872a3 | 3239 | /* Do not rekey GTK/IGTK when STA is in WNM-Sleep Mode */ |
d32d94db XC |
3240 | if (sm->is_wnmsleep) |
3241 | return 0; | |
d32d94db | 3242 | |
3c183894 JM |
3243 | sm->group->GKeyDoneStations++; |
3244 | sm->GUpdateStationKeys = TRUE; | |
3245 | ||
6fc6879b JM |
3246 | wpa_sm_step(sm); |
3247 | return 0; | |
3248 | } | |
3249 | ||
3250 | ||
ad3872a3 JM |
3251 | #ifdef CONFIG_WNM |
3252 | /* update GTK when exiting WNM-Sleep Mode */ | |
d32d94db XC |
3253 | void wpa_wnmsleep_rekey_gtk(struct wpa_state_machine *sm) |
3254 | { | |
629edfef | 3255 | if (sm == NULL || sm->is_wnmsleep) |
d32d94db XC |
3256 | return; |
3257 | ||
3258 | wpa_group_update_sta(sm, NULL); | |
3259 | } | |
3260 | ||
3261 | ||
3262 | void wpa_set_wnmsleep(struct wpa_state_machine *sm, int flag) | |
3263 | { | |
629edfef JM |
3264 | if (sm) |
3265 | sm->is_wnmsleep = !!flag; | |
d32d94db XC |
3266 | } |
3267 | ||
3268 | ||
3269 | int wpa_wnmsleep_gtk_subelem(struct wpa_state_machine *sm, u8 *pos) | |
3270 | { | |
d32d94db | 3271 | struct wpa_group *gsm = sm->group; |
835822d4 | 3272 | u8 *start = pos; |
d32d94db XC |
3273 | |
3274 | /* | |
835822d4 | 3275 | * GTK subelement: |
d32d94db | 3276 | * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] | |
835822d4 | 3277 | * Key[5..32] |
d32d94db | 3278 | */ |
835822d4 JM |
3279 | *pos++ = WNM_SLEEP_SUBELEM_GTK; |
3280 | *pos++ = 11 + gsm->GTK_len; | |
d32d94db | 3281 | /* Key ID in B0-B1 of Key Info */ |
835822d4 JM |
3282 | WPA_PUT_LE16(pos, gsm->GN & 0x03); |
3283 | pos += 2; | |
3284 | *pos++ = gsm->GTK_len; | |
3285 | if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, pos) != 0) | |
d32d94db | 3286 | return 0; |
835822d4 JM |
3287 | pos += 8; |
3288 | os_memcpy(pos, gsm->GTK[gsm->GN - 1], gsm->GTK_len); | |
3289 | pos += gsm->GTK_len; | |
d32d94db | 3290 | |
835822d4 JM |
3291 | wpa_printf(MSG_DEBUG, "WNM: GTK Key ID %u in WNM-Sleep Mode exit", |
3292 | gsm->GN); | |
3293 | wpa_hexdump_key(MSG_DEBUG, "WNM: GTK in WNM-Sleep Mode exit", | |
d32d94db | 3294 | gsm->GTK[gsm->GN - 1], gsm->GTK_len); |
d32d94db | 3295 | |
835822d4 | 3296 | return pos - start; |
d32d94db XC |
3297 | } |
3298 | ||
3299 | ||
3300 | #ifdef CONFIG_IEEE80211W | |
3301 | int wpa_wnmsleep_igtk_subelem(struct wpa_state_machine *sm, u8 *pos) | |
3302 | { | |
d32d94db | 3303 | struct wpa_group *gsm = sm->group; |
835822d4 | 3304 | u8 *start = pos; |
8dd9f9cd | 3305 | size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher); |
d32d94db | 3306 | |
835822d4 JM |
3307 | /* |
3308 | * IGTK subelement: | |
3309 | * Sub-elem ID[1] | Length[1] | KeyID[2] | PN[6] | Key[16] | |
3310 | */ | |
3311 | *pos++ = WNM_SLEEP_SUBELEM_IGTK; | |
8dd9f9cd | 3312 | *pos++ = 2 + 6 + len; |
835822d4 JM |
3313 | WPA_PUT_LE16(pos, gsm->GN_igtk); |
3314 | pos += 2; | |
3315 | if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos) != 0) | |
d32d94db | 3316 | return 0; |
835822d4 | 3317 | pos += 6; |
d32d94db | 3318 | |
8dd9f9cd JM |
3319 | os_memcpy(pos, gsm->IGTK[gsm->GN_igtk - 4], len); |
3320 | pos += len; | |
d32d94db | 3321 | |
835822d4 JM |
3322 | wpa_printf(MSG_DEBUG, "WNM: IGTK Key ID %u in WNM-Sleep Mode exit", |
3323 | gsm->GN_igtk); | |
3324 | wpa_hexdump_key(MSG_DEBUG, "WNM: IGTK in WNM-Sleep Mode exit", | |
8dd9f9cd | 3325 | gsm->IGTK[gsm->GN_igtk - 4], len); |
d32d94db | 3326 | |
835822d4 | 3327 | return pos - start; |
d32d94db XC |
3328 | } |
3329 | #endif /* CONFIG_IEEE80211W */ | |
ad3872a3 | 3330 | #endif /* CONFIG_WNM */ |
d32d94db XC |
3331 | |
3332 | ||
6fc6879b JM |
3333 | static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth, |
3334 | struct wpa_group *group) | |
3335 | { | |
3336 | int tmp; | |
3337 | ||
3338 | wpa_printf(MSG_DEBUG, "WPA: group state machine entering state " | |
3339 | "SETKEYS (VLAN-ID %d)", group->vlan_id); | |
3340 | group->changed = TRUE; | |
3341 | group->wpa_group_state = WPA_GROUP_SETKEYS; | |
3342 | group->GTKReKey = FALSE; | |
3343 | tmp = group->GM; | |
3344 | group->GM = group->GN; | |
3345 | group->GN = tmp; | |
3346 | #ifdef CONFIG_IEEE80211W | |
3347 | tmp = group->GM_igtk; | |
3348 | group->GM_igtk = group->GN_igtk; | |
3349 | group->GN_igtk = tmp; | |
3350 | #endif /* CONFIG_IEEE80211W */ | |
3351 | /* "GKeyDoneStations = GNoStations" is done in more robust way by | |
3352 | * counting the STAs that are marked with GUpdateStationKeys instead of | |
3353 | * including all STAs that could be in not-yet-completed state. */ | |
3354 | wpa_gtk_update(wpa_auth, group); | |
3355 | ||
3c183894 JM |
3356 | if (group->GKeyDoneStations) { |
3357 | wpa_printf(MSG_DEBUG, "wpa_group_setkeys: Unexpected " | |
3358 | "GKeyDoneStations=%d when starting new GTK rekey", | |
3359 | group->GKeyDoneStations); | |
3360 | group->GKeyDoneStations = 0; | |
3361 | } | |
473b6f22 | 3362 | wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, group); |
6fc6879b JM |
3363 | wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d", |
3364 | group->GKeyDoneStations); | |
3365 | } | |
3366 | ||
3367 | ||
1bdb7ab3 JM |
3368 | static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth, |
3369 | struct wpa_group *group) | |
6fc6879b | 3370 | { |
3c7302c2 JM |
3371 | int ret = 0; |
3372 | ||
3c7302c2 | 3373 | if (wpa_auth_set_key(wpa_auth, group->vlan_id, |
c3550295 | 3374 | wpa_cipher_to_alg(wpa_auth->conf.wpa_group), |
0382097e JM |
3375 | broadcast_ether_addr, group->GN, |
3376 | group->GTK[group->GN - 1], group->GTK_len) < 0) | |
3c7302c2 | 3377 | ret = -1; |
6fc6879b JM |
3378 | |
3379 | #ifdef CONFIG_IEEE80211W | |
8dd9f9cd JM |
3380 | if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) { |
3381 | enum wpa_alg alg; | |
3382 | size_t len; | |
3383 | ||
3384 | alg = wpa_cipher_to_alg(wpa_auth->conf.group_mgmt_cipher); | |
3385 | len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher); | |
3386 | ||
3387 | if (ret == 0 && | |
3388 | wpa_auth_set_key(wpa_auth, group->vlan_id, alg, | |
3389 | broadcast_ether_addr, group->GN_igtk, | |
3390 | group->IGTK[group->GN_igtk - 4], len) < 0) | |
3391 | ret = -1; | |
3392 | } | |
6fc6879b | 3393 | #endif /* CONFIG_IEEE80211W */ |
3c7302c2 JM |
3394 | |
3395 | return ret; | |
6fc6879b JM |
3396 | } |
3397 | ||
3398 | ||
7d7f7be2 JM |
3399 | static int wpa_group_disconnect_cb(struct wpa_state_machine *sm, void *ctx) |
3400 | { | |
3401 | if (sm->group == ctx) { | |
3402 | wpa_printf(MSG_DEBUG, "WPA: Mark STA " MACSTR | |
3403 | " for discconnection due to fatal failure", | |
3404 | MAC2STR(sm->addr)); | |
3405 | sm->Disconnect = TRUE; | |
3406 | } | |
3407 | ||
3408 | return 0; | |
3409 | } | |
3410 | ||
3411 | ||
3412 | static void wpa_group_fatal_failure(struct wpa_authenticator *wpa_auth, | |
3413 | struct wpa_group *group) | |
3414 | { | |
3415 | wpa_printf(MSG_DEBUG, "WPA: group state machine entering state FATAL_FAILURE"); | |
3416 | group->changed = TRUE; | |
3417 | group->wpa_group_state = WPA_GROUP_FATAL_FAILURE; | |
3418 | wpa_auth_for_each_sta(wpa_auth, wpa_group_disconnect_cb, group); | |
3419 | } | |
3420 | ||
3421 | ||
1bdb7ab3 JM |
3422 | static int wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth, |
3423 | struct wpa_group *group) | |
3424 | { | |
3425 | wpa_printf(MSG_DEBUG, "WPA: group state machine entering state " | |
3426 | "SETKEYSDONE (VLAN-ID %d)", group->vlan_id); | |
3427 | group->changed = TRUE; | |
3428 | group->wpa_group_state = WPA_GROUP_SETKEYSDONE; | |
3429 | ||
7d7f7be2 JM |
3430 | if (wpa_group_config_group_keys(wpa_auth, group) < 0) { |
3431 | wpa_group_fatal_failure(wpa_auth, group); | |
1bdb7ab3 | 3432 | return -1; |
7d7f7be2 | 3433 | } |
1bdb7ab3 JM |
3434 | |
3435 | return 0; | |
3436 | } | |
3437 | ||
3438 | ||
6fc6879b JM |
3439 | static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth, |
3440 | struct wpa_group *group) | |
3441 | { | |
3442 | if (group->GInit) { | |
3443 | wpa_group_gtk_init(wpa_auth, group); | |
7d7f7be2 JM |
3444 | } else if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) { |
3445 | /* Do not allow group operations */ | |
6fc6879b JM |
3446 | } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT && |
3447 | group->GTKAuthenticator) { | |
3448 | wpa_group_setkeysdone(wpa_auth, group); | |
3449 | } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE && | |
3450 | group->GTKReKey) { | |
3451 | wpa_group_setkeys(wpa_auth, group); | |
3452 | } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) { | |
3453 | if (group->GKeyDoneStations == 0) | |
3454 | wpa_group_setkeysdone(wpa_auth, group); | |
3455 | else if (group->GTKReKey) | |
3456 | wpa_group_setkeys(wpa_auth, group); | |
3457 | } | |
3458 | } | |
3459 | ||
3460 | ||
e4a6ea1d | 3461 | static int wpa_sm_step(struct wpa_state_machine *sm) |
6fc6879b JM |
3462 | { |
3463 | if (sm == NULL) | |
e4a6ea1d | 3464 | return 0; |
6fc6879b JM |
3465 | |
3466 | if (sm->in_step_loop) { | |
3467 | /* This should not happen, but if it does, make sure we do not | |
3468 | * end up freeing the state machine too early by exiting the | |
3469 | * recursive call. */ | |
3470 | wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively"); | |
e4a6ea1d | 3471 | return 0; |
6fc6879b JM |
3472 | } |
3473 | ||
3474 | sm->in_step_loop = 1; | |
3475 | do { | |
3476 | if (sm->pending_deinit) | |
3477 | break; | |
3478 | ||
3479 | sm->changed = FALSE; | |
3480 | sm->wpa_auth->group->changed = FALSE; | |
3481 | ||
3482 | SM_STEP_RUN(WPA_PTK); | |
3483 | if (sm->pending_deinit) | |
3484 | break; | |
3485 | SM_STEP_RUN(WPA_PTK_GROUP); | |
3486 | if (sm->pending_deinit) | |
3487 | break; | |
3488 | wpa_group_sm_step(sm->wpa_auth, sm->group); | |
3489 | } while (sm->changed || sm->wpa_auth->group->changed); | |
3490 | sm->in_step_loop = 0; | |
3491 | ||
3492 | if (sm->pending_deinit) { | |
3493 | wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state " | |
3494 | "machine deinit for " MACSTR, MAC2STR(sm->addr)); | |
3495 | wpa_free_sta_sm(sm); | |
e4a6ea1d | 3496 | return 1; |
6fc6879b | 3497 | } |
e4a6ea1d | 3498 | return 0; |
6fc6879b JM |
3499 | } |
3500 | ||
3501 | ||
3502 | static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx) | |
3503 | { | |
3504 | struct wpa_state_machine *sm = eloop_ctx; | |
3505 | wpa_sm_step(sm); | |
3506 | } | |
3507 | ||
3508 | ||
3509 | void wpa_auth_sm_notify(struct wpa_state_machine *sm) | |
3510 | { | |
3511 | if (sm == NULL) | |
3512 | return; | |
3513 | eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL); | |
3514 | } | |
3515 | ||
3516 | ||
3517 | void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth) | |
3518 | { | |
3519 | int tmp, i; | |
3520 | struct wpa_group *group; | |
3521 | ||
3522 | if (wpa_auth == NULL) | |
3523 | return; | |
3524 | ||
3525 | group = wpa_auth->group; | |
3526 | ||
3527 | for (i = 0; i < 2; i++) { | |
3528 | tmp = group->GM; | |
3529 | group->GM = group->GN; | |
3530 | group->GN = tmp; | |
3531 | #ifdef CONFIG_IEEE80211W | |
3532 | tmp = group->GM_igtk; | |
3533 | group->GM_igtk = group->GN_igtk; | |
3534 | group->GN_igtk = tmp; | |
3535 | #endif /* CONFIG_IEEE80211W */ | |
3536 | wpa_gtk_update(wpa_auth, group); | |
9354e594 | 3537 | wpa_group_config_group_keys(wpa_auth, group); |
6fc6879b JM |
3538 | } |
3539 | } | |
3540 | ||
3541 | ||
a6da824b | 3542 | static const char * wpa_bool_txt(int val) |
6fc6879b | 3543 | { |
a6da824b | 3544 | return val ? "TRUE" : "FALSE"; |
6fc6879b JM |
3545 | } |
3546 | ||
3547 | ||
6fc6879b JM |
3548 | #define RSN_SUITE "%02x-%02x-%02x-%d" |
3549 | #define RSN_SUITE_ARG(s) \ | |
3550 | ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff | |
3551 | ||
3552 | int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen) | |
3553 | { | |
3554 | int len = 0, ret; | |
3555 | char pmkid_txt[PMKID_LEN * 2 + 1]; | |
8ce58ceb IH |
3556 | #ifdef CONFIG_RSN_PREAUTH |
3557 | const int preauth = 1; | |
3558 | #else /* CONFIG_RSN_PREAUTH */ | |
3559 | const int preauth = 0; | |
3560 | #endif /* CONFIG_RSN_PREAUTH */ | |
6fc6879b JM |
3561 | |
3562 | if (wpa_auth == NULL) | |
3563 | return len; | |
3564 | ||
3565 | ret = os_snprintf(buf + len, buflen - len, | |
3566 | "dot11RSNAOptionImplemented=TRUE\n" | |
8ce58ceb | 3567 | "dot11RSNAPreauthenticationImplemented=%s\n" |
6fc6879b JM |
3568 | "dot11RSNAEnabled=%s\n" |
3569 | "dot11RSNAPreauthenticationEnabled=%s\n", | |
8ce58ceb | 3570 | wpa_bool_txt(preauth), |
6fc6879b JM |
3571 | wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN), |
3572 | wpa_bool_txt(wpa_auth->conf.rsn_preauth)); | |
d85e1fc8 | 3573 | if (os_snprintf_error(buflen - len, ret)) |
6fc6879b JM |
3574 | return len; |
3575 | len += ret; | |
3576 | ||
3577 | wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt), | |
3578 | wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN); | |
3579 | ||
3580 | ret = os_snprintf( | |
3581 | buf + len, buflen - len, | |
3582 | "dot11RSNAConfigVersion=%u\n" | |
3583 | "dot11RSNAConfigPairwiseKeysSupported=9999\n" | |
3584 | /* FIX: dot11RSNAConfigGroupCipher */ | |
3585 | /* FIX: dot11RSNAConfigGroupRekeyMethod */ | |
3586 | /* FIX: dot11RSNAConfigGroupRekeyTime */ | |
3587 | /* FIX: dot11RSNAConfigGroupRekeyPackets */ | |
3588 | "dot11RSNAConfigGroupRekeyStrict=%u\n" | |
3589 | "dot11RSNAConfigGroupUpdateCount=%u\n" | |
3590 | "dot11RSNAConfigPairwiseUpdateCount=%u\n" | |
3591 | "dot11RSNAConfigGroupCipherSize=%u\n" | |
3592 | "dot11RSNAConfigPMKLifetime=%u\n" | |
3593 | "dot11RSNAConfigPMKReauthThreshold=%u\n" | |
3594 | "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n" | |
3595 | "dot11RSNAConfigSATimeout=%u\n" | |
3596 | "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n" | |
3597 | "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n" | |
3598 | "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n" | |
3599 | "dot11RSNAPMKIDUsed=%s\n" | |
3600 | "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n" | |
3601 | "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n" | |
3602 | "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n" | |
3603 | "dot11RSNATKIPCounterMeasuresInvoked=%u\n" | |
3604 | "dot11RSNA4WayHandshakeFailures=%u\n" | |
3605 | "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n", | |
3606 | RSN_VERSION, | |
3607 | !!wpa_auth->conf.wpa_strict_rekey, | |
3608 | dot11RSNAConfigGroupUpdateCount, | |
3609 | dot11RSNAConfigPairwiseUpdateCount, | |
c3550295 | 3610 | wpa_cipher_key_len(wpa_auth->conf.wpa_group) * 8, |
6fc6879b JM |
3611 | dot11RSNAConfigPMKLifetime, |
3612 | dot11RSNAConfigPMKReauthThreshold, | |
3613 | dot11RSNAConfigSATimeout, | |
3614 | RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected), | |
3615 | RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected), | |
3616 | RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected), | |
3617 | pmkid_txt, | |
3618 | RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested), | |
3619 | RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested), | |
3620 | RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested), | |
3621 | wpa_auth->dot11RSNATKIPCounterMeasuresInvoked, | |
3622 | wpa_auth->dot11RSNA4WayHandshakeFailures); | |
d85e1fc8 | 3623 | if (os_snprintf_error(buflen - len, ret)) |
6fc6879b JM |
3624 | return len; |
3625 | len += ret; | |
3626 | ||
3627 | /* TODO: dot11RSNAConfigPairwiseCiphersTable */ | |
3628 | /* TODO: dot11RSNAConfigAuthenticationSuitesTable */ | |
3629 | ||
3630 | /* Private MIB */ | |
3631 | ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n", | |
3632 | wpa_auth->group->wpa_group_state); | |
d85e1fc8 | 3633 | if (os_snprintf_error(buflen - len, ret)) |
6fc6879b JM |
3634 | return len; |
3635 | len += ret; | |
3636 | ||
3637 | return len; | |
3638 | } | |
3639 | ||
3640 | ||
3641 | int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen) | |
3642 | { | |
3643 | int len = 0, ret; | |
3644 | u32 pairwise = 0; | |
3645 | ||
3646 | if (sm == NULL) | |
3647 | return 0; | |
3648 | ||
3649 | /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */ | |
3650 | ||
3651 | /* dot11RSNAStatsEntry */ | |
3652 | ||
c3550295 JM |
3653 | pairwise = wpa_cipher_to_suite(sm->wpa == WPA_VERSION_WPA2 ? |
3654 | WPA_PROTO_RSN : WPA_PROTO_WPA, | |
3655 | sm->pairwise); | |
3656 | if (pairwise == 0) | |
6fc6879b JM |
3657 | return 0; |
3658 | ||
3659 | ret = os_snprintf( | |
3660 | buf + len, buflen - len, | |
3661 | /* TODO: dot11RSNAStatsIndex */ | |
3662 | "dot11RSNAStatsSTAAddress=" MACSTR "\n" | |
3663 | "dot11RSNAStatsVersion=1\n" | |
3664 | "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n" | |
3665 | /* TODO: dot11RSNAStatsTKIPICVErrors */ | |
3666 | "dot11RSNAStatsTKIPLocalMICFailures=%u\n" | |
d9040cdb | 3667 | "dot11RSNAStatsTKIPRemoteMICFailures=%u\n" |
6fc6879b JM |
3668 | /* TODO: dot11RSNAStatsCCMPReplays */ |
3669 | /* TODO: dot11RSNAStatsCCMPDecryptErrors */ | |
3670 | /* TODO: dot11RSNAStatsTKIPReplays */, | |
3671 | MAC2STR(sm->addr), | |
3672 | RSN_SUITE_ARG(pairwise), | |
3673 | sm->dot11RSNAStatsTKIPLocalMICFailures, | |
3674 | sm->dot11RSNAStatsTKIPRemoteMICFailures); | |
d85e1fc8 | 3675 | if (os_snprintf_error(buflen - len, ret)) |
6fc6879b JM |
3676 | return len; |
3677 | len += ret; | |
3678 | ||
3679 | /* Private MIB */ | |
3680 | ret = os_snprintf(buf + len, buflen - len, | |
3681 | "hostapdWPAPTKState=%d\n" | |
3682 | "hostapdWPAPTKGroupState=%d\n", | |
3683 | sm->wpa_ptk_state, | |
3684 | sm->wpa_ptk_group_state); | |
d85e1fc8 | 3685 | if (os_snprintf_error(buflen - len, ret)) |
6fc6879b JM |
3686 | return len; |
3687 | len += ret; | |
3688 | ||
3689 | return len; | |
3690 | } | |
3691 | ||
3692 | ||
3693 | void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth) | |
3694 | { | |
3695 | if (wpa_auth) | |
3696 | wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++; | |
3697 | } | |
3698 | ||
3699 | ||
3700 | int wpa_auth_pairwise_set(struct wpa_state_machine *sm) | |
3701 | { | |
3702 | return sm && sm->pairwise_set; | |
3703 | } | |
3704 | ||
3705 | ||
ff36ff00 JM |
3706 | int wpa_auth_get_pairwise(struct wpa_state_machine *sm) |
3707 | { | |
3708 | return sm->pairwise; | |
3709 | } | |
3710 | ||
3711 | ||
6fc6879b JM |
3712 | int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm) |
3713 | { | |
3714 | if (sm == NULL) | |
3715 | return -1; | |
3716 | return sm->wpa_key_mgmt; | |
3717 | } | |
3718 | ||
3719 | ||
3720 | int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm) | |
3721 | { | |
3722 | if (sm == NULL) | |
3723 | return 0; | |
3724 | return sm->wpa; | |
3725 | } | |
3726 | ||
3727 | ||
3728 | int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm, | |
3729 | struct rsn_pmksa_cache_entry *entry) | |
3730 | { | |
3731 | if (sm == NULL || sm->pmksa != entry) | |
3732 | return -1; | |
3733 | sm->pmksa = NULL; | |
3734 | return 0; | |
3735 | } | |
3736 | ||
3737 | ||
3738 | struct rsn_pmksa_cache_entry * | |
3739 | wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm) | |
3740 | { | |
3741 | return sm ? sm->pmksa : NULL; | |
3742 | } | |
3743 | ||
3744 | ||
3745 | void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm) | |
3746 | { | |
3747 | if (sm) | |
3748 | sm->dot11RSNAStatsTKIPLocalMICFailures++; | |
3749 | } | |
3750 | ||
3751 | ||
3752 | const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len) | |
3753 | { | |
3754 | if (wpa_auth == NULL) | |
3755 | return NULL; | |
3756 | *len = wpa_auth->wpa_ie_len; | |
3757 | return wpa_auth->wpa_ie; | |
3758 | } | |
3759 | ||
3760 | ||
3761 | int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk, | |
207976f0 | 3762 | unsigned int pmk_len, |
6fc6879b JM |
3763 | int session_timeout, struct eapol_state_machine *eapol) |
3764 | { | |
cb465555 JM |
3765 | if (sm == NULL || sm->wpa != WPA_VERSION_WPA2 || |
3766 | sm->wpa_auth->conf.disable_pmksa_caching) | |
6fc6879b JM |
3767 | return -1; |
3768 | ||
207976f0 JM |
3769 | if (sm->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X_SUITE_B_192) { |
3770 | if (pmk_len > PMK_LEN_SUITE_B_192) | |
3771 | pmk_len = PMK_LEN_SUITE_B_192; | |
3772 | } else if (pmk_len > PMK_LEN) { | |
3773 | pmk_len = PMK_LEN; | |
3774 | } | |
3775 | ||
70c93963 | 3776 | if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, pmk_len, NULL, |
98cd3d1c | 3777 | sm->PTK.kck, sm->PTK.kck_len, |
4bb081f1 JM |
3778 | sm->wpa_auth->addr, sm->addr, session_timeout, |
3779 | eapol, sm->wpa_key_mgmt)) | |
6fc6879b JM |
3780 | return 0; |
3781 | ||
3782 | return -1; | |
3783 | } | |
3784 | ||
3785 | ||
3786 | int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth, | |
3787 | const u8 *pmk, size_t len, const u8 *sta_addr, | |
3788 | int session_timeout, | |
3789 | struct eapol_state_machine *eapol) | |
3790 | { | |
3791 | if (wpa_auth == NULL) | |
3792 | return -1; | |
3793 | ||
70c93963 | 3794 | if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len, NULL, |
087a1f4e JM |
3795 | NULL, 0, |
3796 | wpa_auth->addr, | |
4bb081f1 JM |
3797 | sta_addr, session_timeout, eapol, |
3798 | WPA_KEY_MGMT_IEEE8021X)) | |
6fc6879b JM |
3799 | return 0; |
3800 | ||
3801 | return -1; | |
3802 | } | |
3803 | ||
3804 | ||
f2991170 | 3805 | int wpa_auth_pmksa_add_sae(struct wpa_authenticator *wpa_auth, const u8 *addr, |
70c93963 | 3806 | const u8 *pmk, const u8 *pmkid) |
f2991170 JM |
3807 | { |
3808 | if (wpa_auth->conf.disable_pmksa_caching) | |
3809 | return -1; | |
3810 | ||
70c93963 | 3811 | if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, PMK_LEN, pmkid, |
087a1f4e | 3812 | NULL, 0, |
f2991170 JM |
3813 | wpa_auth->addr, addr, 0, NULL, |
3814 | WPA_KEY_MGMT_SAE)) | |
3815 | return 0; | |
3816 | ||
3817 | return -1; | |
3818 | } | |
3819 | ||
3820 | ||
901d1fe1 JM |
3821 | void wpa_auth_pmksa_remove(struct wpa_authenticator *wpa_auth, |
3822 | const u8 *sta_addr) | |
3823 | { | |
3824 | struct rsn_pmksa_cache_entry *pmksa; | |
3825 | ||
3826 | if (wpa_auth == NULL || wpa_auth->pmksa == NULL) | |
3827 | return; | |
3828 | pmksa = pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, NULL); | |
3829 | if (pmksa) { | |
3830 | wpa_printf(MSG_DEBUG, "WPA: Remove PMKSA cache entry for " | |
3831 | MACSTR " based on request", MAC2STR(sta_addr)); | |
3832 | pmksa_cache_free_entry(wpa_auth->pmksa, pmksa); | |
3833 | } | |
3834 | } | |
3835 | ||
3836 | ||
b8daac18 MH |
3837 | int wpa_auth_pmksa_list(struct wpa_authenticator *wpa_auth, char *buf, |
3838 | size_t len) | |
3839 | { | |
3840 | if (!wpa_auth || !wpa_auth->pmksa) | |
3841 | return 0; | |
3842 | return pmksa_cache_auth_list(wpa_auth->pmksa, buf, len); | |
3843 | } | |
3844 | ||
3845 | ||
4c522c77 MH |
3846 | void wpa_auth_pmksa_flush(struct wpa_authenticator *wpa_auth) |
3847 | { | |
3848 | if (wpa_auth && wpa_auth->pmksa) | |
3849 | pmksa_cache_auth_flush(wpa_auth->pmksa); | |
3850 | } | |
3851 | ||
3852 | ||
4d77d80e MH |
3853 | #ifdef CONFIG_PMKSA_CACHE_EXTERNAL |
3854 | #ifdef CONFIG_MESH | |
3855 | ||
3856 | int wpa_auth_pmksa_list_mesh(struct wpa_authenticator *wpa_auth, const u8 *addr, | |
3857 | char *buf, size_t len) | |
3858 | { | |
3859 | if (!wpa_auth || !wpa_auth->pmksa) | |
3860 | return 0; | |
3861 | ||
3862 | return pmksa_cache_auth_list_mesh(wpa_auth->pmksa, addr, buf, len); | |
3863 | } | |
3864 | ||
3865 | ||
3866 | struct rsn_pmksa_cache_entry * | |
3867 | wpa_auth_pmksa_create_entry(const u8 *aa, const u8 *spa, const u8 *pmk, | |
3868 | const u8 *pmkid, int expiration) | |
3869 | { | |
3870 | struct rsn_pmksa_cache_entry *entry; | |
3871 | struct os_reltime now; | |
3872 | ||
3873 | entry = pmksa_cache_auth_create_entry(pmk, PMK_LEN, pmkid, NULL, 0, aa, | |
3874 | spa, 0, NULL, WPA_KEY_MGMT_SAE); | |
3875 | if (!entry) | |
3876 | return NULL; | |
3877 | ||
3878 | os_get_reltime(&now); | |
3879 | entry->expiration = now.sec + expiration; | |
3880 | return entry; | |
3881 | } | |
3882 | ||
3883 | ||
3884 | int wpa_auth_pmksa_add_entry(struct wpa_authenticator *wpa_auth, | |
3885 | struct rsn_pmksa_cache_entry *entry) | |
3886 | { | |
3887 | int ret; | |
3888 | ||
3889 | if (!wpa_auth || !wpa_auth->pmksa) | |
3890 | return -1; | |
3891 | ||
3892 | ret = pmksa_cache_auth_add_entry(wpa_auth->pmksa, entry); | |
3893 | if (ret < 0) | |
3894 | wpa_printf(MSG_DEBUG, | |
3895 | "RSN: Failed to store external PMKSA cache for " | |
3896 | MACSTR, MAC2STR(entry->spa)); | |
3897 | ||
3898 | return ret; | |
3899 | } | |
3900 | ||
3901 | #endif /* CONFIG_MESH */ | |
3902 | #endif /* CONFIG_PMKSA_CACHE_EXTERNAL */ | |
3903 | ||
3904 | ||
9f2cf23e | 3905 | struct rsn_pmksa_cache_entry * |
c1bd4bac JM |
3906 | wpa_auth_pmksa_get(struct wpa_authenticator *wpa_auth, const u8 *sta_addr, |
3907 | const u8 *pmkid) | |
9f2cf23e MH |
3908 | { |
3909 | if (!wpa_auth || !wpa_auth->pmksa) | |
3910 | return NULL; | |
c1bd4bac | 3911 | return pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, pmkid); |
9f2cf23e MH |
3912 | } |
3913 | ||
3914 | ||
3915 | void wpa_auth_pmksa_set_to_sm(struct rsn_pmksa_cache_entry *pmksa, | |
3916 | struct wpa_state_machine *sm, | |
3917 | struct wpa_authenticator *wpa_auth, | |
3918 | u8 *pmkid, u8 *pmk) | |
3919 | { | |
3920 | if (!sm) | |
3921 | return; | |
3922 | ||
3923 | sm->pmksa = pmksa; | |
8854f90b JM |
3924 | os_memcpy(pmk, pmksa->pmk, PMK_LEN); |
3925 | os_memcpy(pmkid, pmksa->pmkid, PMKID_LEN); | |
3926 | os_memcpy(wpa_auth->dot11RSNAPMKIDUsed, pmksa->pmkid, PMKID_LEN); | |
9f2cf23e MH |
3927 | } |
3928 | ||
3929 | ||
a0ad9e8c MB |
3930 | /* |
3931 | * Remove and free the group from wpa_authenticator. This is triggered by a | |
3932 | * callback to make sure nobody is currently iterating the group list while it | |
3933 | * gets modified. | |
3934 | */ | |
3935 | static void wpa_group_free(struct wpa_authenticator *wpa_auth, | |
3936 | struct wpa_group *group) | |
3937 | { | |
3938 | struct wpa_group *prev = wpa_auth->group; | |
3939 | ||
3940 | wpa_printf(MSG_DEBUG, "WPA: Remove group state machine for VLAN-ID %d", | |
3941 | group->vlan_id); | |
3942 | ||
3943 | while (prev) { | |
3944 | if (prev->next == group) { | |
3945 | /* This never frees the special first group as needed */ | |
3946 | prev->next = group->next; | |
3947 | os_free(group); | |
3948 | break; | |
3949 | } | |
3950 | prev = prev->next; | |
3951 | } | |
3952 | ||
3953 | } | |
3954 | ||
3955 | ||
3956 | /* Increase the reference counter for group */ | |
3957 | static void wpa_group_get(struct wpa_authenticator *wpa_auth, | |
3958 | struct wpa_group *group) | |
3959 | { | |
3960 | /* Skip the special first group */ | |
3961 | if (wpa_auth->group == group) | |
3962 | return; | |
3963 | ||
3964 | group->references++; | |
3965 | } | |
3966 | ||
3967 | ||
3968 | /* Decrease the reference counter and maybe free the group */ | |
3969 | static void wpa_group_put(struct wpa_authenticator *wpa_auth, | |
3970 | struct wpa_group *group) | |
3971 | { | |
3972 | /* Skip the special first group */ | |
3973 | if (wpa_auth->group == group) | |
3974 | return; | |
3975 | ||
3976 | group->references--; | |
3977 | if (group->references) | |
3978 | return; | |
3979 | wpa_group_free(wpa_auth, group); | |
3980 | } | |
3981 | ||
3982 | ||
3983 | /* | |
3984 | * Add a group that has its references counter set to zero. Caller needs to | |
3985 | * call wpa_group_get() on the return value to mark the entry in use. | |
3986 | */ | |
6fc6879b JM |
3987 | static struct wpa_group * |
3988 | wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id) | |
3989 | { | |
3990 | struct wpa_group *group; | |
3991 | ||
3992 | if (wpa_auth == NULL || wpa_auth->group == NULL) | |
3993 | return NULL; | |
3994 | ||
3995 | wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d", | |
3996 | vlan_id); | |
bdffdc5d | 3997 | group = wpa_group_init(wpa_auth, vlan_id, 0); |
6fc6879b JM |
3998 | if (group == NULL) |
3999 | return NULL; | |
4000 | ||
4001 | group->next = wpa_auth->group->next; | |
4002 | wpa_auth->group->next = group; | |
4003 | ||
4004 | return group; | |
4005 | } | |
4006 | ||
4007 | ||
7cebc8e2 MB |
4008 | /* |
4009 | * Enforce that the group state machine for the VLAN is running, increase | |
4010 | * reference counter as interface is up. References might have been increased | |
4011 | * even if a negative value is returned. | |
4012 | * Returns: -1 on error (group missing, group already failed); otherwise, 0 | |
4013 | */ | |
4014 | int wpa_auth_ensure_group(struct wpa_authenticator *wpa_auth, int vlan_id) | |
4015 | { | |
4016 | struct wpa_group *group; | |
4017 | ||
4018 | if (wpa_auth == NULL) | |
4019 | return 0; | |
4020 | ||
4021 | group = wpa_auth->group; | |
4022 | while (group) { | |
4023 | if (group->vlan_id == vlan_id) | |
4024 | break; | |
4025 | group = group->next; | |
4026 | } | |
4027 | ||
4028 | if (group == NULL) { | |
4029 | group = wpa_auth_add_group(wpa_auth, vlan_id); | |
4030 | if (group == NULL) | |
4031 | return -1; | |
4032 | } | |
4033 | ||
4034 | wpa_printf(MSG_DEBUG, | |
4035 | "WPA: Ensure group state machine running for VLAN ID %d", | |
4036 | vlan_id); | |
4037 | ||
4038 | wpa_group_get(wpa_auth, group); | |
4039 | group->num_setup_iface++; | |
4040 | ||
4041 | if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) | |
4042 | return -1; | |
4043 | ||
4044 | return 0; | |
4045 | } | |
4046 | ||
4047 | ||
4048 | /* | |
4049 | * Decrease reference counter, expected to be zero afterwards. | |
4050 | * returns: -1 on error (group not found, group in fail state) | |
4051 | * -2 if wpa_group is still referenced | |
4052 | * 0 else | |
4053 | */ | |
4054 | int wpa_auth_release_group(struct wpa_authenticator *wpa_auth, int vlan_id) | |
4055 | { | |
4056 | struct wpa_group *group; | |
4057 | int ret = 0; | |
4058 | ||
4059 | if (wpa_auth == NULL) | |
4060 | return 0; | |
4061 | ||
4062 | group = wpa_auth->group; | |
4063 | while (group) { | |
4064 | if (group->vlan_id == vlan_id) | |
4065 | break; | |
4066 | group = group->next; | |
4067 | } | |
4068 | ||
4069 | if (group == NULL) | |
4070 | return -1; | |
4071 | ||
4072 | wpa_printf(MSG_DEBUG, | |
4073 | "WPA: Try stopping group state machine for VLAN ID %d", | |
4074 | vlan_id); | |
4075 | ||
4076 | if (group->num_setup_iface <= 0) { | |
4077 | wpa_printf(MSG_ERROR, | |
4078 | "WPA: wpa_auth_release_group called more often than wpa_auth_ensure_group for VLAN ID %d, skipping.", | |
4079 | vlan_id); | |
4080 | return -1; | |
4081 | } | |
4082 | group->num_setup_iface--; | |
4083 | ||
4084 | if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) | |
4085 | ret = -1; | |
4086 | ||
4087 | if (group->references > 1) { | |
4088 | wpa_printf(MSG_DEBUG, | |
4089 | "WPA: Cannot stop group state machine for VLAN ID %d as references are still hold", | |
4090 | vlan_id); | |
4091 | ret = -2; | |
4092 | } | |
4093 | ||
4094 | wpa_group_put(wpa_auth, group); | |
4095 | ||
4096 | return ret; | |
4097 | } | |
4098 | ||
4099 | ||
6fc6879b JM |
4100 | int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id) |
4101 | { | |
4102 | struct wpa_group *group; | |
4103 | ||
4104 | if (sm == NULL || sm->wpa_auth == NULL) | |
4105 | return 0; | |
4106 | ||
4107 | group = sm->wpa_auth->group; | |
4108 | while (group) { | |
4109 | if (group->vlan_id == vlan_id) | |
4110 | break; | |
4111 | group = group->next; | |
4112 | } | |
4113 | ||
4114 | if (group == NULL) { | |
4115 | group = wpa_auth_add_group(sm->wpa_auth, vlan_id); | |
4116 | if (group == NULL) | |
4117 | return -1; | |
4118 | } | |
4119 | ||
4120 | if (sm->group == group) | |
4121 | return 0; | |
4122 | ||
7d7f7be2 JM |
4123 | if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) |
4124 | return -1; | |
4125 | ||
6fc6879b JM |
4126 | wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state " |
4127 | "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id); | |
4128 | ||
a0ad9e8c MB |
4129 | wpa_group_get(sm->wpa_auth, group); |
4130 | wpa_group_put(sm->wpa_auth, sm->group); | |
6fc6879b | 4131 | sm->group = group; |
a0ad9e8c | 4132 | |
6fc6879b JM |
4133 | return 0; |
4134 | } | |
e4bf4db9 JM |
4135 | |
4136 | ||
4137 | void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth, | |
4138 | struct wpa_state_machine *sm, int ack) | |
4139 | { | |
4140 | if (wpa_auth == NULL || sm == NULL) | |
4141 | return; | |
4142 | wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key TX status for STA " MACSTR | |
4143 | " ack=%d", MAC2STR(sm->addr), ack); | |
4144 | if (sm->pending_1_of_4_timeout && ack) { | |
4145 | /* | |
4146 | * Some deployed supplicant implementations update their SNonce | |
4147 | * for each EAPOL-Key 2/4 message even within the same 4-way | |
4148 | * handshake and then fail to use the first SNonce when | |
4149 | * deriving the PTK. This results in unsuccessful 4-way | |
4150 | * handshake whenever the relatively short initial timeout is | |
4151 | * reached and EAPOL-Key 1/4 is retransmitted. Try to work | |
4152 | * around this by increasing the timeout now that we know that | |
4153 | * the station has received the frame. | |
4154 | */ | |
4155 | int timeout_ms = eapol_key_timeout_subseq; | |
4156 | wpa_printf(MSG_DEBUG, "WPA: Increase initial EAPOL-Key 1/4 " | |
4157 | "timeout by %u ms because of acknowledged frame", | |
4158 | timeout_ms); | |
4159 | eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm); | |
4160 | eloop_register_timeout(timeout_ms / 1000, | |
4161 | (timeout_ms % 1000) * 1000, | |
4162 | wpa_send_eapol_timeout, wpa_auth, sm); | |
4163 | } | |
4164 | } | |
c10347f2 JM |
4165 | |
4166 | ||
4167 | int wpa_auth_uses_sae(struct wpa_state_machine *sm) | |
4168 | { | |
4169 | if (sm == NULL) | |
4170 | return 0; | |
4171 | return wpa_key_mgmt_sae(sm->wpa_key_mgmt); | |
4172 | } | |
aa189ac9 JM |
4173 | |
4174 | ||
4175 | int wpa_auth_uses_ft_sae(struct wpa_state_machine *sm) | |
4176 | { | |
4177 | if (sm == NULL) | |
4178 | return 0; | |
4179 | return sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_SAE; | |
4180 | } | |
25ef8529 JM |
4181 | |
4182 | ||
4183 | #ifdef CONFIG_P2P | |
4184 | int wpa_auth_get_ip_addr(struct wpa_state_machine *sm, u8 *addr) | |
4185 | { | |
4186 | if (sm == NULL || WPA_GET_BE32(sm->ip_addr) == 0) | |
4187 | return -1; | |
4188 | os_memcpy(addr, sm->ip_addr, 4); | |
4189 | return 0; | |
4190 | } | |
4191 | #endif /* CONFIG_P2P */ | |
cbc210de JM |
4192 | |
4193 | ||
4194 | int wpa_auth_radius_das_disconnect_pmksa(struct wpa_authenticator *wpa_auth, | |
4195 | struct radius_das_attrs *attr) | |
4196 | { | |
4197 | return pmksa_cache_auth_radius_das_disconnect(wpa_auth->pmksa, attr); | |
4198 | } | |
34782730 JM |
4199 | |
4200 | ||
4201 | void wpa_auth_reconfig_group_keys(struct wpa_authenticator *wpa_auth) | |
4202 | { | |
4203 | struct wpa_group *group; | |
4204 | ||
4205 | if (!wpa_auth) | |
4206 | return; | |
4207 | for (group = wpa_auth->group; group; group = group->next) | |
4208 | wpa_group_config_group_keys(wpa_auth, group); | |
4209 | } |