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Commit | Line | Data |
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6fc6879b | 1 | /* |
00338a4f | 2 | * IEEE 802.11 RSN / WPA Authenticator |
9f12271b | 3 | * Copyright (c) 2004-2018, 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" |
17c2559c | 16 | #include "common/ocv.h" |
3b5b7aa8 | 17 | #include "crypto/aes.h" |
03da66bd | 18 | #include "crypto/aes_wrap.h" |
3b5b7aa8 | 19 | #include "crypto/aes_siv.h" |
03da66bd JM |
20 | #include "crypto/crypto.h" |
21 | #include "crypto/sha1.h" | |
22 | #include "crypto/sha256.h" | |
c6eb3e34 | 23 | #include "crypto/sha384.h" |
3642c431 | 24 | #include "crypto/random.h" |
281c950b | 25 | #include "eapol_auth/eapol_auth_sm.h" |
17c2559c | 26 | #include "drivers/driver.h" |
6226e38d | 27 | #include "ap_config.h" |
6fc6879b | 28 | #include "ieee802_11.h" |
6226e38d JM |
29 | #include "wpa_auth.h" |
30 | #include "pmksa_cache_auth.h" | |
6fc6879b JM |
31 | #include "wpa_auth_i.h" |
32 | #include "wpa_auth_ie.h" | |
33 | ||
34 | #define STATE_MACHINE_DATA struct wpa_state_machine | |
35 | #define STATE_MACHINE_DEBUG_PREFIX "WPA" | |
36 | #define STATE_MACHINE_ADDR sm->addr | |
37 | ||
38 | ||
39 | static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx); | |
e4a6ea1d | 40 | static int wpa_sm_step(struct wpa_state_machine *sm); |
567da5bb JM |
41 | static int wpa_verify_key_mic(int akmp, size_t pmk_len, struct wpa_ptk *PTK, |
42 | u8 *data, size_t data_len); | |
75c8563e JM |
43 | #ifdef CONFIG_FILS |
44 | static int wpa_aead_decrypt(struct wpa_state_machine *sm, struct wpa_ptk *ptk, | |
45 | u8 *buf, size_t buf_len, u16 *_key_data_len); | |
9392859d JM |
46 | static struct wpabuf * fils_prepare_plainbuf(struct wpa_state_machine *sm, |
47 | const struct wpabuf *hlp); | |
75c8563e | 48 | #endif /* CONFIG_FILS */ |
6fc6879b JM |
49 | static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx); |
50 | static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth, | |
51 | struct wpa_group *group); | |
581a8cde | 52 | static void wpa_request_new_ptk(struct wpa_state_machine *sm); |
e6965d4e JM |
53 | static int wpa_gtk_update(struct wpa_authenticator *wpa_auth, |
54 | struct wpa_group *group); | |
1bdb7ab3 JM |
55 | static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth, |
56 | struct wpa_group *group); | |
f23c5b17 | 57 | static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce, |
207976f0 JM |
58 | const u8 *pmk, unsigned int pmk_len, |
59 | struct wpa_ptk *ptk); | |
a0ad9e8c MB |
60 | static void wpa_group_free(struct wpa_authenticator *wpa_auth, |
61 | struct wpa_group *group); | |
62 | static void wpa_group_get(struct wpa_authenticator *wpa_auth, | |
63 | struct wpa_group *group); | |
64 | static void wpa_group_put(struct wpa_authenticator *wpa_auth, | |
65 | struct wpa_group *group); | |
e73ffa09 | 66 | static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos); |
6fc6879b | 67 | |
bae61562 JM |
68 | static const u32 eapol_key_timeout_first = 100; /* ms */ |
69 | static const u32 eapol_key_timeout_subseq = 1000; /* ms */ | |
00338a4f | 70 | static const u32 eapol_key_timeout_first_group = 500; /* ms */ |
6f234c1e | 71 | static const u32 eapol_key_timeout_no_retrans = 4000; /* ms */ |
6fc6879b JM |
72 | |
73 | /* TODO: make these configurable */ | |
74 | static const int dot11RSNAConfigPMKLifetime = 43200; | |
75 | static const int dot11RSNAConfigPMKReauthThreshold = 70; | |
76 | static const int dot11RSNAConfigSATimeout = 60; | |
77 | ||
78 | ||
c772d054 | 79 | static inline int wpa_auth_mic_failure_report( |
6fc6879b JM |
80 | struct wpa_authenticator *wpa_auth, const u8 *addr) |
81 | { | |
cef8fac0 JB |
82 | if (wpa_auth->cb->mic_failure_report) |
83 | return wpa_auth->cb->mic_failure_report(wpa_auth->cb_ctx, addr); | |
c772d054 | 84 | return 0; |
6fc6879b JM |
85 | } |
86 | ||
87 | ||
2c502460 JM |
88 | static inline void wpa_auth_psk_failure_report( |
89 | struct wpa_authenticator *wpa_auth, const u8 *addr) | |
90 | { | |
cef8fac0 JB |
91 | if (wpa_auth->cb->psk_failure_report) |
92 | wpa_auth->cb->psk_failure_report(wpa_auth->cb_ctx, addr); | |
2c502460 JM |
93 | } |
94 | ||
95 | ||
6fc6879b JM |
96 | static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth, |
97 | const u8 *addr, wpa_eapol_variable var, | |
98 | int value) | |
99 | { | |
cef8fac0 JB |
100 | if (wpa_auth->cb->set_eapol) |
101 | wpa_auth->cb->set_eapol(wpa_auth->cb_ctx, addr, var, value); | |
6fc6879b JM |
102 | } |
103 | ||
104 | ||
105 | static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth, | |
106 | const u8 *addr, wpa_eapol_variable var) | |
107 | { | |
cef8fac0 | 108 | if (wpa_auth->cb->get_eapol == NULL) |
6fc6879b | 109 | return -1; |
cef8fac0 | 110 | return wpa_auth->cb->get_eapol(wpa_auth->cb_ctx, addr, var); |
6fc6879b JM |
111 | } |
112 | ||
113 | ||
114 | static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth, | |
759fd76b JM |
115 | const u8 *addr, |
116 | const u8 *p2p_dev_addr, | |
7a12edd1 | 117 | const u8 *prev_psk, size_t *psk_len) |
6fc6879b | 118 | { |
cef8fac0 | 119 | if (wpa_auth->cb->get_psk == NULL) |
6fc6879b | 120 | return NULL; |
cef8fac0 | 121 | return wpa_auth->cb->get_psk(wpa_auth->cb_ctx, addr, p2p_dev_addr, |
7a12edd1 | 122 | prev_psk, psk_len); |
6fc6879b JM |
123 | } |
124 | ||
125 | ||
126 | static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth, | |
127 | const u8 *addr, u8 *msk, size_t *len) | |
128 | { | |
cef8fac0 | 129 | if (wpa_auth->cb->get_msk == NULL) |
6fc6879b | 130 | return -1; |
cef8fac0 | 131 | return wpa_auth->cb->get_msk(wpa_auth->cb_ctx, addr, msk, len); |
6fc6879b JM |
132 | } |
133 | ||
134 | ||
135 | static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth, | |
136 | int vlan_id, | |
71934751 | 137 | enum wpa_alg alg, const u8 *addr, int idx, |
6fc6879b JM |
138 | u8 *key, size_t key_len) |
139 | { | |
cef8fac0 | 140 | if (wpa_auth->cb->set_key == NULL) |
6fc6879b | 141 | return -1; |
cef8fac0 JB |
142 | return wpa_auth->cb->set_key(wpa_auth->cb_ctx, vlan_id, alg, addr, idx, |
143 | key, key_len); | |
6fc6879b JM |
144 | } |
145 | ||
146 | ||
147 | static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth, | |
148 | const u8 *addr, int idx, u8 *seq) | |
149 | { | |
cef8fac0 | 150 | if (wpa_auth->cb->get_seqnum == NULL) |
6fc6879b | 151 | return -1; |
cef8fac0 | 152 | return wpa_auth->cb->get_seqnum(wpa_auth->cb_ctx, addr, idx, seq); |
6fc6879b JM |
153 | } |
154 | ||
155 | ||
6fc6879b JM |
156 | static inline int |
157 | wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr, | |
158 | const u8 *data, size_t data_len, int encrypt) | |
159 | { | |
cef8fac0 | 160 | if (wpa_auth->cb->send_eapol == NULL) |
6fc6879b | 161 | return -1; |
cef8fac0 JB |
162 | return wpa_auth->cb->send_eapol(wpa_auth->cb_ctx, addr, data, data_len, |
163 | encrypt); | |
6fc6879b JM |
164 | } |
165 | ||
166 | ||
c50d94f1 BC |
167 | #ifdef CONFIG_MESH |
168 | static inline int wpa_auth_start_ampe(struct wpa_authenticator *wpa_auth, | |
169 | const u8 *addr) | |
170 | { | |
cef8fac0 | 171 | if (wpa_auth->cb->start_ampe == NULL) |
c50d94f1 | 172 | return -1; |
cef8fac0 | 173 | return wpa_auth->cb->start_ampe(wpa_auth->cb_ctx, addr); |
c50d94f1 BC |
174 | } |
175 | #endif /* CONFIG_MESH */ | |
176 | ||
177 | ||
6fc6879b JM |
178 | int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth, |
179 | int (*cb)(struct wpa_state_machine *sm, void *ctx), | |
180 | void *cb_ctx) | |
181 | { | |
cef8fac0 | 182 | if (wpa_auth->cb->for_each_sta == NULL) |
6fc6879b | 183 | return 0; |
cef8fac0 | 184 | return wpa_auth->cb->for_each_sta(wpa_auth->cb_ctx, cb, cb_ctx); |
6fc6879b JM |
185 | } |
186 | ||
187 | ||
bf98f7f3 JM |
188 | int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth, |
189 | int (*cb)(struct wpa_authenticator *a, void *ctx), | |
190 | void *cb_ctx) | |
191 | { | |
cef8fac0 | 192 | if (wpa_auth->cb->for_each_auth == NULL) |
bf98f7f3 | 193 | return 0; |
cef8fac0 | 194 | return wpa_auth->cb->for_each_auth(wpa_auth->cb_ctx, cb, cb_ctx); |
bf98f7f3 JM |
195 | } |
196 | ||
197 | ||
6fc6879b JM |
198 | void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr, |
199 | logger_level level, const char *txt) | |
200 | { | |
cef8fac0 | 201 | if (wpa_auth->cb->logger == NULL) |
6fc6879b | 202 | return; |
cef8fac0 | 203 | wpa_auth->cb->logger(wpa_auth->cb_ctx, addr, level, txt); |
6fc6879b JM |
204 | } |
205 | ||
206 | ||
207 | void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr, | |
208 | logger_level level, const char *fmt, ...) | |
209 | { | |
210 | char *format; | |
211 | int maxlen; | |
212 | va_list ap; | |
213 | ||
cef8fac0 | 214 | if (wpa_auth->cb->logger == NULL) |
6fc6879b JM |
215 | return; |
216 | ||
217 | maxlen = os_strlen(fmt) + 100; | |
218 | format = os_malloc(maxlen); | |
219 | if (!format) | |
220 | return; | |
221 | ||
222 | va_start(ap, fmt); | |
223 | vsnprintf(format, maxlen, fmt, ap); | |
224 | va_end(ap); | |
225 | ||
226 | wpa_auth_logger(wpa_auth, addr, level, format); | |
227 | ||
228 | os_free(format); | |
229 | } | |
230 | ||
231 | ||
232 | static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth, | |
567da5bb | 233 | const u8 *addr, u16 reason) |
6fc6879b | 234 | { |
cef8fac0 | 235 | if (wpa_auth->cb->disconnect == NULL) |
6fc6879b | 236 | return; |
567da5bb JM |
237 | wpa_printf(MSG_DEBUG, "wpa_sta_disconnect STA " MACSTR " (reason %u)", |
238 | MAC2STR(addr), reason); | |
239 | wpa_auth->cb->disconnect(wpa_auth->cb_ctx, addr, reason); | |
6fc6879b JM |
240 | } |
241 | ||
242 | ||
17c2559c MV |
243 | #ifdef CONFIG_OCV |
244 | static int wpa_channel_info(struct wpa_authenticator *wpa_auth, | |
245 | struct wpa_channel_info *ci) | |
246 | { | |
247 | if (!wpa_auth->cb->channel_info) | |
248 | return -1; | |
249 | return wpa_auth->cb->channel_info(wpa_auth->cb_ctx, ci); | |
250 | } | |
251 | #endif /* CONFIG_OCV */ | |
252 | ||
253 | ||
6fc6879b JM |
254 | static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx) |
255 | { | |
256 | struct wpa_authenticator *wpa_auth = eloop_ctx; | |
257 | ||
3642c431 | 258 | if (random_get_bytes(wpa_auth->group->GMK, WPA_GMK_LEN)) { |
6fc6879b JM |
259 | wpa_printf(MSG_ERROR, "Failed to get random data for WPA " |
260 | "initialization."); | |
261 | } else { | |
262 | wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd"); | |
5cb9d5c3 JM |
263 | wpa_hexdump_key(MSG_DEBUG, "GMK", |
264 | wpa_auth->group->GMK, WPA_GMK_LEN); | |
6fc6879b JM |
265 | } |
266 | ||
267 | if (wpa_auth->conf.wpa_gmk_rekey) { | |
268 | eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0, | |
269 | wpa_rekey_gmk, wpa_auth, NULL); | |
270 | } | |
271 | } | |
272 | ||
273 | ||
274 | static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx) | |
275 | { | |
276 | struct wpa_authenticator *wpa_auth = eloop_ctx; | |
a0ad9e8c | 277 | struct wpa_group *group, *next; |
6fc6879b JM |
278 | |
279 | wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK"); | |
a0ad9e8c MB |
280 | group = wpa_auth->group; |
281 | while (group) { | |
282 | wpa_group_get(wpa_auth, group); | |
283 | ||
6fc6879b JM |
284 | group->GTKReKey = TRUE; |
285 | do { | |
286 | group->changed = FALSE; | |
287 | wpa_group_sm_step(wpa_auth, group); | |
288 | } while (group->changed); | |
a0ad9e8c MB |
289 | |
290 | next = group->next; | |
291 | wpa_group_put(wpa_auth, group); | |
292 | group = next; | |
6fc6879b JM |
293 | } |
294 | ||
295 | if (wpa_auth->conf.wpa_group_rekey) { | |
296 | eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, | |
297 | 0, wpa_rekey_gtk, wpa_auth, NULL); | |
298 | } | |
299 | } | |
300 | ||
301 | ||
581a8cde JM |
302 | static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx) |
303 | { | |
304 | struct wpa_authenticator *wpa_auth = eloop_ctx; | |
305 | struct wpa_state_machine *sm = timeout_ctx; | |
306 | ||
307 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK"); | |
308 | wpa_request_new_ptk(sm); | |
309 | wpa_sm_step(sm); | |
310 | } | |
311 | ||
312 | ||
6fc6879b JM |
313 | static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx) |
314 | { | |
315 | if (sm->pmksa == ctx) | |
316 | sm->pmksa = NULL; | |
317 | return 0; | |
318 | } | |
319 | ||
320 | ||
321 | static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry, | |
322 | void *ctx) | |
323 | { | |
324 | struct wpa_authenticator *wpa_auth = ctx; | |
325 | wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry); | |
326 | } | |
327 | ||
328 | ||
1bdb7ab3 JM |
329 | static int wpa_group_init_gmk_and_counter(struct wpa_authenticator *wpa_auth, |
330 | struct wpa_group *group) | |
331 | { | |
559cdabb | 332 | u8 buf[ETH_ALEN + 8 + sizeof(unsigned long)]; |
1bdb7ab3 | 333 | u8 rkey[32]; |
559cdabb | 334 | unsigned long ptr; |
1bdb7ab3 | 335 | |
3642c431 | 336 | if (random_get_bytes(group->GMK, WPA_GMK_LEN) < 0) |
1bdb7ab3 JM |
337 | return -1; |
338 | wpa_hexdump_key(MSG_DEBUG, "GMK", group->GMK, WPA_GMK_LEN); | |
339 | ||
340 | /* | |
341 | * Counter = PRF-256(Random number, "Init Counter", | |
342 | * Local MAC Address || Time) | |
343 | */ | |
344 | os_memcpy(buf, wpa_auth->addr, ETH_ALEN); | |
345 | wpa_get_ntp_timestamp(buf + ETH_ALEN); | |
559cdabb JM |
346 | ptr = (unsigned long) group; |
347 | os_memcpy(buf + ETH_ALEN + 8, &ptr, sizeof(ptr)); | |
3642c431 | 348 | if (random_get_bytes(rkey, sizeof(rkey)) < 0) |
1bdb7ab3 JM |
349 | return -1; |
350 | ||
351 | if (sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf), | |
352 | group->Counter, WPA_NONCE_LEN) < 0) | |
353 | return -1; | |
354 | wpa_hexdump_key(MSG_DEBUG, "Key Counter", | |
355 | group->Counter, WPA_NONCE_LEN); | |
356 | ||
357 | return 0; | |
358 | } | |
359 | ||
360 | ||
e6965d4e | 361 | static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth, |
bdffdc5d | 362 | int vlan_id, int delay_init) |
e6965d4e JM |
363 | { |
364 | struct wpa_group *group; | |
e6965d4e JM |
365 | |
366 | group = os_zalloc(sizeof(struct wpa_group)); | |
367 | if (group == NULL) | |
368 | return NULL; | |
369 | ||
370 | group->GTKAuthenticator = TRUE; | |
371 | group->vlan_id = vlan_id; | |
c3550295 | 372 | group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group); |
6fc6879b | 373 | |
08704cd8 JM |
374 | if (random_pool_ready() != 1) { |
375 | wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool " | |
376 | "for secure operations - update keys later when " | |
377 | "the first station connects"); | |
378 | } | |
379 | ||
1bdb7ab3 JM |
380 | /* |
381 | * Set initial GMK/Counter value here. The actual values that will be | |
382 | * used in negotiations will be set once the first station tries to | |
383 | * connect. This allows more time for collecting additional randomness | |
384 | * on embedded devices. | |
6fc6879b | 385 | */ |
1bdb7ab3 | 386 | if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0) { |
6fc6879b JM |
387 | wpa_printf(MSG_ERROR, "Failed to get random data for WPA " |
388 | "initialization."); | |
389 | os_free(group); | |
390 | return NULL; | |
391 | } | |
6fc6879b JM |
392 | |
393 | group->GInit = TRUE; | |
bdffdc5d JM |
394 | if (delay_init) { |
395 | wpa_printf(MSG_DEBUG, "WPA: Delay group state machine start " | |
396 | "until Beacon frames have been configured"); | |
397 | /* Initialization is completed in wpa_init_keys(). */ | |
398 | } else { | |
399 | wpa_group_sm_step(wpa_auth, group); | |
400 | group->GInit = FALSE; | |
401 | wpa_group_sm_step(wpa_auth, group); | |
402 | } | |
6fc6879b JM |
403 | |
404 | return group; | |
405 | } | |
406 | ||
407 | ||
408 | /** | |
409 | * wpa_init - Initialize WPA authenticator | |
410 | * @addr: Authenticator address | |
411 | * @conf: Configuration for WPA authenticator | |
a17df5fb | 412 | * @cb: Callback functions for WPA authenticator |
6fc6879b JM |
413 | * Returns: Pointer to WPA authenticator data or %NULL on failure |
414 | */ | |
415 | struct wpa_authenticator * wpa_init(const u8 *addr, | |
416 | struct wpa_auth_config *conf, | |
cef8fac0 JB |
417 | const struct wpa_auth_callbacks *cb, |
418 | void *cb_ctx) | |
6fc6879b JM |
419 | { |
420 | struct wpa_authenticator *wpa_auth; | |
421 | ||
422 | wpa_auth = os_zalloc(sizeof(struct wpa_authenticator)); | |
423 | if (wpa_auth == NULL) | |
424 | return NULL; | |
425 | os_memcpy(wpa_auth->addr, addr, ETH_ALEN); | |
426 | os_memcpy(&wpa_auth->conf, conf, sizeof(*conf)); | |
cef8fac0 JB |
427 | wpa_auth->cb = cb; |
428 | wpa_auth->cb_ctx = cb_ctx; | |
6fc6879b JM |
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 | ||
4bb081f1 | 516 | pmksa_cache_auth_deinit(wpa_auth->pmksa); |
6fc6879b | 517 | |
4ec1fd8e | 518 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b JM |
519 | wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache); |
520 | wpa_auth->ft_pmk_cache = NULL; | |
eefe8630 | 521 | wpa_ft_deinit(wpa_auth); |
4ec1fd8e | 522 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b | 523 | |
25ef8529 JM |
524 | #ifdef CONFIG_P2P |
525 | bitfield_free(wpa_auth->ip_pool); | |
526 | #endif /* CONFIG_P2P */ | |
527 | ||
528 | ||
6fc6879b JM |
529 | os_free(wpa_auth->wpa_ie); |
530 | ||
531 | group = wpa_auth->group; | |
532 | while (group) { | |
533 | prev = group; | |
534 | group = group->next; | |
535 | os_free(prev); | |
536 | } | |
537 | ||
538 | os_free(wpa_auth); | |
539 | } | |
540 | ||
541 | ||
542 | /** | |
543 | * wpa_reconfig - Update WPA authenticator configuration | |
544 | * @wpa_auth: Pointer to WPA authenticator data from wpa_init() | |
545 | * @conf: Configuration for WPA authenticator | |
546 | */ | |
547 | int wpa_reconfig(struct wpa_authenticator *wpa_auth, | |
548 | struct wpa_auth_config *conf) | |
549 | { | |
e6965d4e | 550 | struct wpa_group *group; |
6fc6879b JM |
551 | if (wpa_auth == NULL) |
552 | return 0; | |
553 | ||
554 | os_memcpy(&wpa_auth->conf, conf, sizeof(*conf)); | |
ad08c363 JM |
555 | if (wpa_auth_gen_wpa_ie(wpa_auth)) { |
556 | wpa_printf(MSG_ERROR, "Could not generate WPA IE."); | |
557 | return -1; | |
558 | } | |
559 | ||
e6965d4e JM |
560 | /* |
561 | * Reinitialize GTK to make sure it is suitable for the new | |
562 | * configuration. | |
563 | */ | |
564 | group = wpa_auth->group; | |
c3550295 | 565 | group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group); |
e6965d4e JM |
566 | group->GInit = TRUE; |
567 | wpa_group_sm_step(wpa_auth, group); | |
568 | group->GInit = FALSE; | |
569 | wpa_group_sm_step(wpa_auth, group); | |
570 | ||
6fc6879b JM |
571 | return 0; |
572 | } | |
573 | ||
574 | ||
575 | struct wpa_state_machine * | |
94ddef3e JM |
576 | wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr, |
577 | const u8 *p2p_dev_addr) | |
6fc6879b JM |
578 | { |
579 | struct wpa_state_machine *sm; | |
580 | ||
7d7f7be2 JM |
581 | if (wpa_auth->group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) |
582 | return NULL; | |
583 | ||
6fc6879b JM |
584 | sm = os_zalloc(sizeof(struct wpa_state_machine)); |
585 | if (sm == NULL) | |
586 | return NULL; | |
587 | os_memcpy(sm->addr, addr, ETH_ALEN); | |
94ddef3e JM |
588 | if (p2p_dev_addr) |
589 | os_memcpy(sm->p2p_dev_addr, p2p_dev_addr, ETH_ALEN); | |
6fc6879b JM |
590 | |
591 | sm->wpa_auth = wpa_auth; | |
592 | sm->group = wpa_auth->group; | |
a0ad9e8c | 593 | wpa_group_get(sm->wpa_auth, sm->group); |
6fc6879b JM |
594 | |
595 | return sm; | |
596 | } | |
597 | ||
598 | ||
6f9b5d16 JM |
599 | int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth, |
600 | struct wpa_state_machine *sm) | |
6fc6879b JM |
601 | { |
602 | if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL) | |
6f9b5d16 | 603 | return -1; |
6fc6879b | 604 | |
4ec1fd8e | 605 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b JM |
606 | if (sm->ft_completed) { |
607 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
608 | "FT authentication already completed - do not " | |
609 | "start 4-way handshake"); | |
3d4d2348 JM |
610 | /* Go to PTKINITDONE state to allow GTK rekeying */ |
611 | sm->wpa_ptk_state = WPA_PTK_PTKINITDONE; | |
3bbc4705 | 612 | sm->Pair = TRUE; |
6f9b5d16 | 613 | return 0; |
6fc6879b | 614 | } |
4ec1fd8e | 615 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b | 616 | |
07e0117d JM |
617 | #ifdef CONFIG_FILS |
618 | if (sm->fils_completed) { | |
619 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
620 | "FILS authentication already completed - do not start 4-way handshake"); | |
621 | /* Go to PTKINITDONE state to allow GTK rekeying */ | |
622 | sm->wpa_ptk_state = WPA_PTK_PTKINITDONE; | |
3bbc4705 | 623 | sm->Pair = TRUE; |
07e0117d JM |
624 | return 0; |
625 | } | |
626 | #endif /* CONFIG_FILS */ | |
627 | ||
6fc6879b | 628 | if (sm->started) { |
22a299ee | 629 | os_memset(&sm->key_replay, 0, sizeof(sm->key_replay)); |
6fc6879b | 630 | sm->ReAuthenticationRequest = TRUE; |
6f9b5d16 | 631 | return wpa_sm_step(sm); |
6fc6879b JM |
632 | } |
633 | ||
634 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
635 | "start authentication"); | |
636 | sm->started = 1; | |
637 | ||
638 | sm->Init = TRUE; | |
e4a6ea1d | 639 | if (wpa_sm_step(sm) == 1) |
6f9b5d16 | 640 | return 1; /* should not really happen */ |
6fc6879b JM |
641 | sm->Init = FALSE; |
642 | sm->AuthenticationRequest = TRUE; | |
6f9b5d16 | 643 | return wpa_sm_step(sm); |
6fc6879b JM |
644 | } |
645 | ||
646 | ||
a8d05fca JM |
647 | void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm) |
648 | { | |
649 | /* WPA/RSN was not used - clear WPA state. This is needed if the STA | |
650 | * reassociates back to the same AP while the previous entry for the | |
651 | * STA has not yet been removed. */ | |
652 | if (sm == NULL) | |
653 | return; | |
654 | ||
655 | sm->wpa_key_mgmt = 0; | |
656 | } | |
657 | ||
658 | ||
6fc6879b JM |
659 | static void wpa_free_sta_sm(struct wpa_state_machine *sm) |
660 | { | |
25ef8529 JM |
661 | #ifdef CONFIG_P2P |
662 | if (WPA_GET_BE32(sm->ip_addr)) { | |
663 | u32 start; | |
664 | wpa_printf(MSG_DEBUG, "P2P: Free assigned IP " | |
665 | "address %u.%u.%u.%u from " MACSTR, | |
666 | sm->ip_addr[0], sm->ip_addr[1], | |
667 | sm->ip_addr[2], sm->ip_addr[3], | |
668 | MAC2STR(sm->addr)); | |
669 | start = WPA_GET_BE32(sm->wpa_auth->conf.ip_addr_start); | |
670 | bitfield_clear(sm->wpa_auth->ip_pool, | |
671 | WPA_GET_BE32(sm->ip_addr) - start); | |
672 | } | |
673 | #endif /* CONFIG_P2P */ | |
2ade8ef2 JM |
674 | if (sm->GUpdateStationKeys) { |
675 | sm->group->GKeyDoneStations--; | |
676 | sm->GUpdateStationKeys = FALSE; | |
677 | } | |
4ec1fd8e | 678 | #ifdef CONFIG_IEEE80211R_AP |
0f857f43 | 679 | os_free(sm->assoc_resp_ftie); |
692ec305 | 680 | wpabuf_free(sm->ft_pending_req_ies); |
4ec1fd8e | 681 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b JM |
682 | os_free(sm->last_rx_eapol_key); |
683 | os_free(sm->wpa_ie); | |
a0ad9e8c | 684 | wpa_group_put(sm->wpa_auth, sm->group); |
6fc6879b JM |
685 | os_free(sm); |
686 | } | |
687 | ||
688 | ||
689 | void wpa_auth_sta_deinit(struct wpa_state_machine *sm) | |
690 | { | |
691 | if (sm == NULL) | |
692 | return; | |
693 | ||
694 | if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) { | |
695 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
696 | "strict rekeying - force GTK rekey since STA " | |
697 | "is leaving"); | |
3f5a1860 JB |
698 | if (eloop_deplete_timeout(0, 500000, wpa_rekey_gtk, |
699 | sm->wpa_auth, NULL) == -1) | |
700 | eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth, | |
701 | NULL); | |
6fc6879b JM |
702 | } |
703 | ||
704 | eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm); | |
e4bf4db9 | 705 | sm->pending_1_of_4_timeout = 0; |
6fc6879b | 706 | eloop_cancel_timeout(wpa_sm_call_step, sm, NULL); |
581a8cde | 707 | eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm); |
3a46cf93 MB |
708 | #ifdef CONFIG_IEEE80211R_AP |
709 | wpa_ft_sta_deinit(sm); | |
710 | #endif /* CONFIG_IEEE80211R_AP */ | |
6fc6879b JM |
711 | if (sm->in_step_loop) { |
712 | /* Must not free state machine while wpa_sm_step() is running. | |
713 | * Freeing will be completed in the end of wpa_sm_step(). */ | |
714 | wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state " | |
715 | "machine deinit for " MACSTR, MAC2STR(sm->addr)); | |
716 | sm->pending_deinit = 1; | |
717 | } else | |
718 | wpa_free_sta_sm(sm); | |
719 | } | |
720 | ||
721 | ||
722 | static void wpa_request_new_ptk(struct wpa_state_machine *sm) | |
723 | { | |
724 | if (sm == NULL) | |
725 | return; | |
726 | ||
727 | sm->PTKRequest = TRUE; | |
728 | sm->PTK_valid = 0; | |
729 | } | |
730 | ||
731 | ||
68921e24 | 732 | static int wpa_replay_counter_valid(struct wpa_key_replay_counter *ctr, |
22a299ee JM |
733 | const u8 *replay_counter) |
734 | { | |
735 | int i; | |
736 | for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) { | |
68921e24 | 737 | if (!ctr[i].valid) |
22a299ee | 738 | break; |
68921e24 | 739 | if (os_memcmp(replay_counter, ctr[i].counter, |
22a299ee JM |
740 | WPA_REPLAY_COUNTER_LEN) == 0) |
741 | return 1; | |
742 | } | |
743 | return 0; | |
744 | } | |
745 | ||
746 | ||
68921e24 JM |
747 | static void wpa_replay_counter_mark_invalid(struct wpa_key_replay_counter *ctr, |
748 | const u8 *replay_counter) | |
749 | { | |
750 | int i; | |
751 | for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) { | |
752 | if (ctr[i].valid && | |
753 | (replay_counter == NULL || | |
754 | os_memcmp(replay_counter, ctr[i].counter, | |
755 | WPA_REPLAY_COUNTER_LEN) == 0)) | |
756 | ctr[i].valid = FALSE; | |
757 | } | |
758 | } | |
759 | ||
760 | ||
4ec1fd8e | 761 | #ifdef CONFIG_IEEE80211R_AP |
0f857f43 JM |
762 | static int ft_check_msg_2_of_4(struct wpa_authenticator *wpa_auth, |
763 | struct wpa_state_machine *sm, | |
764 | struct wpa_eapol_ie_parse *kde) | |
765 | { | |
766 | struct wpa_ie_data ie; | |
767 | struct rsn_mdie *mdie; | |
768 | ||
769 | if (wpa_parse_wpa_ie_rsn(kde->rsn_ie, kde->rsn_ie_len, &ie) < 0 || | |
770 | ie.num_pmkid != 1 || ie.pmkid == NULL) { | |
771 | wpa_printf(MSG_DEBUG, "FT: No PMKR1Name in " | |
772 | "FT 4-way handshake message 2/4"); | |
773 | return -1; | |
774 | } | |
775 | ||
776 | os_memcpy(sm->sup_pmk_r1_name, ie.pmkid, PMKID_LEN); | |
777 | wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Supplicant", | |
778 | sm->sup_pmk_r1_name, PMKID_LEN); | |
779 | ||
780 | if (!kde->mdie || !kde->ftie) { | |
781 | wpa_printf(MSG_DEBUG, "FT: No %s in FT 4-way handshake " | |
782 | "message 2/4", kde->mdie ? "FTIE" : "MDIE"); | |
783 | return -1; | |
784 | } | |
785 | ||
786 | mdie = (struct rsn_mdie *) (kde->mdie + 2); | |
787 | if (kde->mdie[1] < sizeof(struct rsn_mdie) || | |
788 | os_memcmp(wpa_auth->conf.mobility_domain, mdie->mobility_domain, | |
789 | MOBILITY_DOMAIN_ID_LEN) != 0) { | |
790 | wpa_printf(MSG_DEBUG, "FT: MDIE mismatch"); | |
791 | return -1; | |
792 | } | |
793 | ||
794 | if (sm->assoc_resp_ftie && | |
795 | (kde->ftie[1] != sm->assoc_resp_ftie[1] || | |
796 | os_memcmp(kde->ftie, sm->assoc_resp_ftie, | |
797 | 2 + sm->assoc_resp_ftie[1]) != 0)) { | |
798 | wpa_printf(MSG_DEBUG, "FT: FTIE mismatch"); | |
799 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 2/4", | |
800 | kde->ftie, kde->ftie_len); | |
801 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)AssocResp", | |
802 | sm->assoc_resp_ftie, 2 + sm->assoc_resp_ftie[1]); | |
803 | return -1; | |
804 | } | |
805 | ||
806 | return 0; | |
807 | } | |
4ec1fd8e | 808 | #endif /* CONFIG_IEEE80211R_AP */ |
0f857f43 JM |
809 | |
810 | ||
c772d054 JM |
811 | static int wpa_receive_error_report(struct wpa_authenticator *wpa_auth, |
812 | struct wpa_state_machine *sm, int group) | |
ec027805 JM |
813 | { |
814 | /* Supplicant reported a Michael MIC error */ | |
815 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
816 | "received EAPOL-Key Error Request " | |
817 | "(STA detected Michael MIC failure (group=%d))", | |
818 | group); | |
fbc72d32 JM |
819 | |
820 | if (group && wpa_auth->conf.wpa_group != WPA_CIPHER_TKIP) { | |
821 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
822 | "ignore Michael MIC failure report since " | |
823 | "group cipher is not TKIP"); | |
824 | } else if (!group && sm->pairwise != WPA_CIPHER_TKIP) { | |
825 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
826 | "ignore Michael MIC failure report since " | |
827 | "pairwise cipher is not TKIP"); | |
828 | } else { | |
c772d054 JM |
829 | if (wpa_auth_mic_failure_report(wpa_auth, sm->addr) > 0) |
830 | return 1; /* STA entry was removed */ | |
fbc72d32 JM |
831 | sm->dot11RSNAStatsTKIPRemoteMICFailures++; |
832 | wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++; | |
833 | } | |
ec027805 JM |
834 | |
835 | /* | |
836 | * Error report is not a request for a new key handshake, but since | |
837 | * Authenticator may do it, let's change the keys now anyway. | |
838 | */ | |
839 | wpa_request_new_ptk(sm); | |
c772d054 | 840 | return 0; |
ec027805 JM |
841 | } |
842 | ||
843 | ||
f23c5b17 JM |
844 | static int wpa_try_alt_snonce(struct wpa_state_machine *sm, u8 *data, |
845 | size_t data_len) | |
846 | { | |
847 | struct wpa_ptk PTK; | |
848 | int ok = 0; | |
849 | const u8 *pmk = NULL; | |
7a12edd1 | 850 | size_t pmk_len; |
f23c5b17 | 851 | |
b729fd8d | 852 | os_memset(&PTK, 0, sizeof(PTK)); |
f23c5b17 | 853 | for (;;) { |
e61fea6b JM |
854 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) && |
855 | !wpa_key_mgmt_sae(sm->wpa_key_mgmt)) { | |
f23c5b17 | 856 | pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, |
7a12edd1 | 857 | sm->p2p_dev_addr, pmk, &pmk_len); |
f23c5b17 JM |
858 | if (pmk == NULL) |
859 | break; | |
f9854c18 MK |
860 | #ifdef CONFIG_IEEE80211R_AP |
861 | if (wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt)) { | |
862 | os_memcpy(sm->xxkey, pmk, pmk_len); | |
863 | sm->xxkey_len = pmk_len; | |
864 | } | |
865 | #endif /* CONFIG_IEEE80211R_AP */ | |
207976f0 | 866 | } else { |
f23c5b17 | 867 | pmk = sm->PMK; |
207976f0 JM |
868 | pmk_len = sm->pmk_len; |
869 | } | |
f23c5b17 | 870 | |
364c064a JM |
871 | if (wpa_derive_ptk(sm, sm->alt_SNonce, pmk, pmk_len, &PTK) < 0) |
872 | break; | |
f23c5b17 | 873 | |
567da5bb JM |
874 | if (wpa_verify_key_mic(sm->wpa_key_mgmt, pmk_len, &PTK, |
875 | data, data_len) == 0) { | |
f23c5b17 JM |
876 | ok = 1; |
877 | break; | |
878 | } | |
879 | ||
f5e0a332 JM |
880 | if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) || |
881 | wpa_key_mgmt_sae(sm->wpa_key_mgmt)) | |
f23c5b17 JM |
882 | break; |
883 | } | |
884 | ||
885 | if (!ok) { | |
886 | wpa_printf(MSG_DEBUG, | |
887 | "WPA: Earlier SNonce did not result in matching MIC"); | |
888 | return -1; | |
889 | } | |
890 | ||
891 | wpa_printf(MSG_DEBUG, | |
892 | "WPA: Earlier SNonce resulted in matching MIC"); | |
893 | sm->alt_snonce_valid = 0; | |
894 | os_memcpy(sm->SNonce, sm->alt_SNonce, WPA_NONCE_LEN); | |
895 | os_memcpy(&sm->PTK, &PTK, sizeof(PTK)); | |
896 | sm->PTK_valid = TRUE; | |
897 | ||
898 | return 0; | |
899 | } | |
900 | ||
901 | ||
6fc6879b JM |
902 | void wpa_receive(struct wpa_authenticator *wpa_auth, |
903 | struct wpa_state_machine *sm, | |
904 | u8 *data, size_t data_len) | |
905 | { | |
906 | struct ieee802_1x_hdr *hdr; | |
907 | struct wpa_eapol_key *key; | |
908 | u16 key_info, key_data_length; | |
a0bf1b68 | 909 | enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST } msg; |
6fc6879b JM |
910 | char *msgtxt; |
911 | struct wpa_eapol_ie_parse kde; | |
3b5b7aa8 JM |
912 | const u8 *key_data; |
913 | size_t keyhdrlen, mic_len; | |
6d014ffc | 914 | u8 *mic; |
6fc6879b JM |
915 | |
916 | if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL) | |
917 | return; | |
dc5bad48 | 918 | wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL data", data, data_len); |
6fc6879b | 919 | |
567da5bb | 920 | mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len); |
6d014ffc | 921 | keyhdrlen = sizeof(*key) + mic_len + 2; |
5e3b5197 | 922 | |
dc5bad48 JM |
923 | if (data_len < sizeof(*hdr) + keyhdrlen) { |
924 | wpa_printf(MSG_DEBUG, "WPA: Ignore too short EAPOL-Key frame"); | |
6fc6879b | 925 | return; |
dc5bad48 | 926 | } |
6fc6879b JM |
927 | |
928 | hdr = (struct ieee802_1x_hdr *) data; | |
929 | key = (struct wpa_eapol_key *) (hdr + 1); | |
6d014ffc | 930 | mic = (u8 *) (key + 1); |
6fc6879b | 931 | key_info = WPA_GET_BE16(key->key_info); |
6d014ffc JM |
932 | key_data = mic + mic_len + 2; |
933 | key_data_length = WPA_GET_BE16(mic + mic_len); | |
0d442aff | 934 | wpa_printf(MSG_DEBUG, "WPA: Received EAPOL-Key from " MACSTR |
dc5bad48 JM |
935 | " key_info=0x%x type=%u mic_len=%u key_data_length=%u", |
936 | MAC2STR(sm->addr), key_info, key->type, | |
937 | (unsigned int) mic_len, key_data_length); | |
938 | wpa_hexdump(MSG_MSGDUMP, | |
939 | "WPA: EAPOL-Key header (ending before Key MIC)", | |
940 | key, sizeof(*key)); | |
941 | wpa_hexdump(MSG_MSGDUMP, "WPA: EAPOL-Key Key MIC", | |
942 | mic, mic_len); | |
5e3b5197 | 943 | if (key_data_length > data_len - sizeof(*hdr) - keyhdrlen) { |
6fc6879b JM |
944 | wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - " |
945 | "key_data overflow (%d > %lu)", | |
946 | key_data_length, | |
947 | (unsigned long) (data_len - sizeof(*hdr) - | |
5e3b5197 | 948 | keyhdrlen)); |
6fc6879b JM |
949 | return; |
950 | } | |
951 | ||
f8e96eb6 | 952 | if (sm->wpa == WPA_VERSION_WPA2) { |
74590e71 JM |
953 | if (key->type == EAPOL_KEY_TYPE_WPA) { |
954 | /* | |
955 | * Some deployed station implementations seem to send | |
956 | * msg 4/4 with incorrect type value in WPA2 mode. | |
957 | */ | |
958 | wpa_printf(MSG_DEBUG, "Workaround: Allow EAPOL-Key " | |
959 | "with unexpected WPA type in RSN mode"); | |
960 | } else if (key->type != EAPOL_KEY_TYPE_RSN) { | |
f8e96eb6 JM |
961 | wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with " |
962 | "unexpected type %d in RSN mode", | |
963 | key->type); | |
964 | return; | |
965 | } | |
966 | } else { | |
967 | if (key->type != EAPOL_KEY_TYPE_WPA) { | |
968 | wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with " | |
969 | "unexpected type %d in WPA mode", | |
970 | key->type); | |
971 | return; | |
972 | } | |
973 | } | |
974 | ||
bc8318ac JM |
975 | wpa_hexdump(MSG_DEBUG, "WPA: Received Key Nonce", key->key_nonce, |
976 | WPA_NONCE_LEN); | |
977 | wpa_hexdump(MSG_DEBUG, "WPA: Received Replay Counter", | |
978 | key->replay_counter, WPA_REPLAY_COUNTER_LEN); | |
979 | ||
6fc6879b JM |
980 | /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys |
981 | * are set */ | |
982 | ||
a0bf1b68 JM |
983 | if (key_info & WPA_KEY_INFO_SMK_MESSAGE) { |
984 | wpa_printf(MSG_DEBUG, "WPA: Ignore SMK message"); | |
985 | return; | |
986 | } | |
987 | ||
988 | if (key_info & WPA_KEY_INFO_REQUEST) { | |
6fc6879b JM |
989 | msg = REQUEST; |
990 | msgtxt = "Request"; | |
991 | } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) { | |
992 | msg = GROUP_2; | |
993 | msgtxt = "2/2 Group"; | |
3b5b7aa8 JM |
994 | } else if (key_data_length == 0 || |
995 | (mic_len == 0 && (key_info & WPA_KEY_INFO_ENCR_KEY_DATA) && | |
996 | key_data_length == AES_BLOCK_SIZE)) { | |
6fc6879b JM |
997 | msg = PAIRWISE_4; |
998 | msgtxt = "4/4 Pairwise"; | |
999 | } else { | |
1000 | msg = PAIRWISE_2; | |
1001 | msgtxt = "2/4 Pairwise"; | |
1002 | } | |
1003 | ||
6fc6879b JM |
1004 | if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 || |
1005 | msg == GROUP_2) { | |
1006 | u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK; | |
eb7719ff JM |
1007 | if (sm->pairwise == WPA_CIPHER_CCMP || |
1008 | sm->pairwise == WPA_CIPHER_GCMP) { | |
4bc801ab JM |
1009 | if (wpa_use_cmac(sm->wpa_key_mgmt) && |
1010 | !wpa_use_akm_defined(sm->wpa_key_mgmt) && | |
6fc6879b JM |
1011 | ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) { |
1012 | wpa_auth_logger(wpa_auth, sm->addr, | |
1013 | LOGGER_WARNING, | |
1014 | "advertised support for " | |
1015 | "AES-128-CMAC, but did not " | |
1016 | "use it"); | |
1017 | return; | |
1018 | } | |
1019 | ||
4bc801ab JM |
1020 | if (!wpa_use_cmac(sm->wpa_key_mgmt) && |
1021 | !wpa_use_akm_defined(sm->wpa_key_mgmt) && | |
6fc6879b JM |
1022 | ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { |
1023 | wpa_auth_logger(wpa_auth, sm->addr, | |
1024 | LOGGER_WARNING, | |
1025 | "did not use HMAC-SHA1-AES " | |
eb7719ff | 1026 | "with CCMP/GCMP"); |
6fc6879b JM |
1027 | return; |
1028 | } | |
1029 | } | |
929a2ea5 | 1030 | |
4bc801ab | 1031 | if (wpa_use_akm_defined(sm->wpa_key_mgmt) && |
929a2ea5 JM |
1032 | ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) { |
1033 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING, | |
1034 | "did not use EAPOL-Key descriptor version 0 as required for AKM-defined cases"); | |
1035 | return; | |
1036 | } | |
6fc6879b JM |
1037 | } |
1038 | ||
1039 | if (key_info & WPA_KEY_INFO_REQUEST) { | |
1040 | if (sm->req_replay_counter_used && | |
1041 | os_memcmp(key->replay_counter, sm->req_replay_counter, | |
1042 | WPA_REPLAY_COUNTER_LEN) <= 0) { | |
1043 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING, | |
1044 | "received EAPOL-Key request with " | |
1045 | "replayed counter"); | |
1046 | return; | |
1047 | } | |
1048 | } | |
1049 | ||
1050 | if (!(key_info & WPA_KEY_INFO_REQUEST) && | |
68921e24 | 1051 | !wpa_replay_counter_valid(sm->key_replay, key->replay_counter)) { |
22a299ee | 1052 | int i; |
68921e24 JM |
1053 | |
1054 | if (msg == PAIRWISE_2 && | |
1055 | wpa_replay_counter_valid(sm->prev_key_replay, | |
1056 | key->replay_counter) && | |
1057 | sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING && | |
1058 | os_memcmp(sm->SNonce, key->key_nonce, WPA_NONCE_LEN) != 0) | |
1059 | { | |
1060 | /* | |
1061 | * Some supplicant implementations (e.g., Windows XP | |
1062 | * WZC) update SNonce for each EAPOL-Key 2/4. This | |
1063 | * breaks the workaround on accepting any of the | |
1064 | * pending requests, so allow the SNonce to be updated | |
1065 | * even if we have already sent out EAPOL-Key 3/4. | |
1066 | */ | |
1067 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1068 | "Process SNonce update from STA " | |
1069 | "based on retransmitted EAPOL-Key " | |
1070 | "1/4"); | |
1071 | sm->update_snonce = 1; | |
f23c5b17 JM |
1072 | os_memcpy(sm->alt_SNonce, sm->SNonce, WPA_NONCE_LEN); |
1073 | sm->alt_snonce_valid = TRUE; | |
1074 | os_memcpy(sm->alt_replay_counter, | |
1075 | sm->key_replay[0].counter, | |
1076 | WPA_REPLAY_COUNTER_LEN); | |
1077 | goto continue_processing; | |
1078 | } | |
1079 | ||
1080 | if (msg == PAIRWISE_4 && sm->alt_snonce_valid && | |
1081 | sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING && | |
1082 | os_memcmp(key->replay_counter, sm->alt_replay_counter, | |
1083 | WPA_REPLAY_COUNTER_LEN) == 0) { | |
1084 | /* | |
1085 | * Supplicant may still be using the old SNonce since | |
1086 | * there was two EAPOL-Key 2/4 messages and they had | |
1087 | * different SNonce values. | |
1088 | */ | |
1089 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1090 | "Try to process received EAPOL-Key 4/4 based on old Replay Counter and SNonce from an earlier EAPOL-Key 1/4"); | |
68921e24 JM |
1091 | goto continue_processing; |
1092 | } | |
1093 | ||
1094 | if (msg == PAIRWISE_2 && | |
1095 | wpa_replay_counter_valid(sm->prev_key_replay, | |
1096 | key->replay_counter) && | |
1097 | sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING) { | |
1098 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1099 | "ignore retransmitted EAPOL-Key %s - " | |
1100 | "SNonce did not change", msgtxt); | |
1101 | } else { | |
1102 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1103 | "received EAPOL-Key %s with " | |
1104 | "unexpected replay counter", msgtxt); | |
1105 | } | |
22a299ee JM |
1106 | for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) { |
1107 | if (!sm->key_replay[i].valid) | |
1108 | break; | |
1109 | wpa_hexdump(MSG_DEBUG, "pending replay counter", | |
1110 | sm->key_replay[i].counter, | |
1111 | WPA_REPLAY_COUNTER_LEN); | |
1112 | } | |
6fc6879b JM |
1113 | wpa_hexdump(MSG_DEBUG, "received replay counter", |
1114 | key->replay_counter, WPA_REPLAY_COUNTER_LEN); | |
1115 | return; | |
1116 | } | |
1117 | ||
68921e24 | 1118 | continue_processing: |
3b5b7aa8 JM |
1119 | #ifdef CONFIG_FILS |
1120 | if (sm->wpa == WPA_VERSION_WPA2 && mic_len == 0 && | |
1121 | !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { | |
1122 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1123 | "WPA: Encr Key Data bit not set even though AEAD cipher is supposed to be used - drop frame"); | |
1124 | return; | |
1125 | } | |
1126 | #endif /* CONFIG_FILS */ | |
1127 | ||
6fc6879b JM |
1128 | switch (msg) { |
1129 | case PAIRWISE_2: | |
1130 | if (sm->wpa_ptk_state != WPA_PTK_PTKSTART && | |
68921e24 JM |
1131 | sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING && |
1132 | (!sm->update_snonce || | |
1133 | sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING)) { | |
6fc6879b JM |
1134 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, |
1135 | "received EAPOL-Key msg 2/4 in " | |
1136 | "invalid state (%d) - dropped", | |
1137 | sm->wpa_ptk_state); | |
1138 | return; | |
1139 | } | |
bbb921da | 1140 | random_add_randomness(key->key_nonce, WPA_NONCE_LEN); |
08704cd8 JM |
1141 | if (sm->group->reject_4way_hs_for_entropy) { |
1142 | /* | |
1143 | * The system did not have enough entropy to generate | |
1144 | * strong random numbers. Reject the first 4-way | |
1145 | * handshake(s) and collect some entropy based on the | |
1146 | * information from it. Once enough entropy is | |
1147 | * available, the next atempt will trigger GMK/Key | |
1148 | * Counter update and the station will be allowed to | |
1149 | * continue. | |
1150 | */ | |
1151 | wpa_printf(MSG_DEBUG, "WPA: Reject 4-way handshake to " | |
1152 | "collect more entropy for random number " | |
1153 | "generation"); | |
08704cd8 | 1154 | random_mark_pool_ready(); |
567da5bb JM |
1155 | wpa_sta_disconnect(wpa_auth, sm->addr, |
1156 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
08704cd8 JM |
1157 | return; |
1158 | } | |
6fc6879b JM |
1159 | break; |
1160 | case PAIRWISE_4: | |
1161 | if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING || | |
1162 | !sm->PTK_valid) { | |
1163 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
1164 | "received EAPOL-Key msg 4/4 in " | |
1165 | "invalid state (%d) - dropped", | |
1166 | sm->wpa_ptk_state); | |
1167 | return; | |
1168 | } | |
1169 | break; | |
1170 | case GROUP_2: | |
1171 | if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING | |
1172 | || !sm->PTK_valid) { | |
1173 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
1174 | "received EAPOL-Key msg 2/2 in " | |
1175 | "invalid state (%d) - dropped", | |
1176 | sm->wpa_ptk_group_state); | |
1177 | return; | |
1178 | } | |
1179 | break; | |
6fc6879b JM |
1180 | case REQUEST: |
1181 | break; | |
1182 | } | |
1183 | ||
1184 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1185 | "received EAPOL-Key frame (%s)", msgtxt); | |
1186 | ||
1187 | if (key_info & WPA_KEY_INFO_ACK) { | |
1188 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1189 | "received invalid EAPOL-Key: Key Ack set"); | |
1190 | return; | |
1191 | } | |
1192 | ||
b9866483 JM |
1193 | if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt) && |
1194 | !(key_info & WPA_KEY_INFO_MIC)) { | |
6fc6879b JM |
1195 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, |
1196 | "received invalid EAPOL-Key: Key MIC not set"); | |
1197 | return; | |
1198 | } | |
1199 | ||
b9866483 JM |
1200 | #ifdef CONFIG_FILS |
1201 | if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) && | |
1202 | (key_info & WPA_KEY_INFO_MIC)) { | |
1203 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1204 | "received invalid EAPOL-Key: Key MIC set"); | |
1205 | return; | |
1206 | } | |
1207 | #endif /* CONFIG_FILS */ | |
1208 | ||
6fc6879b | 1209 | sm->MICVerified = FALSE; |
68921e24 | 1210 | if (sm->PTK_valid && !sm->update_snonce) { |
3b5b7aa8 | 1211 | if (mic_len && |
567da5bb JM |
1212 | wpa_verify_key_mic(sm->wpa_key_mgmt, sm->pmk_len, &sm->PTK, |
1213 | data, data_len) && | |
f23c5b17 JM |
1214 | (msg != PAIRWISE_4 || !sm->alt_snonce_valid || |
1215 | wpa_try_alt_snonce(sm, data, data_len))) { | |
6fc6879b JM |
1216 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, |
1217 | "received EAPOL-Key with invalid MIC"); | |
1218 | return; | |
1219 | } | |
75c8563e JM |
1220 | #ifdef CONFIG_FILS |
1221 | if (!mic_len && | |
1222 | wpa_aead_decrypt(sm, &sm->PTK, data, data_len, | |
1223 | &key_data_length) < 0) { | |
1224 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1225 | "received EAPOL-Key with invalid MIC"); | |
1226 | return; | |
1227 | } | |
1228 | #endif /* CONFIG_FILS */ | |
6fc6879b JM |
1229 | sm->MICVerified = TRUE; |
1230 | eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm); | |
e4bf4db9 | 1231 | sm->pending_1_of_4_timeout = 0; |
6fc6879b JM |
1232 | } |
1233 | ||
1234 | if (key_info & WPA_KEY_INFO_REQUEST) { | |
1235 | if (sm->MICVerified) { | |
1236 | sm->req_replay_counter_used = 1; | |
1237 | os_memcpy(sm->req_replay_counter, key->replay_counter, | |
1238 | WPA_REPLAY_COUNTER_LEN); | |
1239 | } else { | |
1240 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1241 | "received EAPOL-Key request with " | |
1242 | "invalid MIC"); | |
1243 | return; | |
1244 | } | |
1245 | ||
1246 | /* | |
1247 | * TODO: should decrypt key data field if encryption was used; | |
1248 | * even though MAC address KDE is not normally encrypted, | |
1249 | * supplicant is allowed to encrypt it. | |
1250 | */ | |
a0bf1b68 | 1251 | if (key_info & WPA_KEY_INFO_ERROR) { |
c772d054 JM |
1252 | if (wpa_receive_error_report( |
1253 | wpa_auth, sm, | |
1254 | !(key_info & WPA_KEY_INFO_KEY_TYPE)) > 0) | |
1255 | return; /* STA entry was removed */ | |
6fc6879b JM |
1256 | } else if (key_info & WPA_KEY_INFO_KEY_TYPE) { |
1257 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1258 | "received EAPOL-Key Request for new " | |
1259 | "4-Way Handshake"); | |
1260 | wpa_request_new_ptk(sm); | |
6fc6879b | 1261 | } else if (key_data_length > 0 && |
5e3b5197 JM |
1262 | wpa_parse_kde_ies(key_data, key_data_length, |
1263 | &kde) == 0 && | |
6fc6879b JM |
1264 | kde.mac_addr) { |
1265 | } else { | |
1266 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1267 | "received EAPOL-Key Request for GTK " | |
1268 | "rekeying"); | |
6fc6879b JM |
1269 | eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL); |
1270 | wpa_rekey_gtk(wpa_auth, NULL); | |
1271 | } | |
1272 | } else { | |
68921e24 JM |
1273 | /* Do not allow the same key replay counter to be reused. */ |
1274 | wpa_replay_counter_mark_invalid(sm->key_replay, | |
1275 | key->replay_counter); | |
1276 | ||
1277 | if (msg == PAIRWISE_2) { | |
1278 | /* | |
1279 | * Maintain a copy of the pending EAPOL-Key frames in | |
1280 | * case the EAPOL-Key frame was retransmitted. This is | |
1281 | * needed to allow EAPOL-Key msg 2/4 reply to another | |
1282 | * pending msg 1/4 to update the SNonce to work around | |
1283 | * unexpected supplicant behavior. | |
1284 | */ | |
1285 | os_memcpy(sm->prev_key_replay, sm->key_replay, | |
1286 | sizeof(sm->key_replay)); | |
1287 | } else { | |
1288 | os_memset(sm->prev_key_replay, 0, | |
1289 | sizeof(sm->prev_key_replay)); | |
1290 | } | |
1291 | ||
1292 | /* | |
1293 | * Make sure old valid counters are not accepted anymore and | |
1294 | * do not get copied again. | |
1295 | */ | |
1296 | wpa_replay_counter_mark_invalid(sm->key_replay, NULL); | |
6fc6879b JM |
1297 | } |
1298 | ||
6fc6879b | 1299 | os_free(sm->last_rx_eapol_key); |
a1f11e34 | 1300 | sm->last_rx_eapol_key = os_memdup(data, data_len); |
6fc6879b JM |
1301 | if (sm->last_rx_eapol_key == NULL) |
1302 | return; | |
6fc6879b JM |
1303 | sm->last_rx_eapol_key_len = data_len; |
1304 | ||
0d442aff | 1305 | sm->rx_eapol_key_secure = !!(key_info & WPA_KEY_INFO_SECURE); |
6fc6879b JM |
1306 | sm->EAPOLKeyReceived = TRUE; |
1307 | sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE); | |
1308 | sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST); | |
1309 | os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN); | |
1310 | wpa_sm_step(sm); | |
1311 | } | |
1312 | ||
1313 | ||
3c7302c2 JM |
1314 | static int wpa_gmk_to_gtk(const u8 *gmk, const char *label, const u8 *addr, |
1315 | const u8 *gnonce, u8 *gtk, size_t gtk_len) | |
6fc6879b | 1316 | { |
c6eb3e34 | 1317 | u8 data[ETH_ALEN + WPA_NONCE_LEN + 8 + WPA_GTK_MAX_LEN]; |
5cb9d5c3 | 1318 | u8 *pos; |
3c7302c2 | 1319 | int ret = 0; |
6fc6879b | 1320 | |
5cb9d5c3 JM |
1321 | /* GTK = PRF-X(GMK, "Group key expansion", |
1322 | * AA || GNonce || Time || random data) | |
1323 | * The example described in the IEEE 802.11 standard uses only AA and | |
1324 | * GNonce as inputs here. Add some more entropy since this derivation | |
1325 | * is done only at the Authenticator and as such, does not need to be | |
1326 | * exactly same. | |
1327 | */ | |
c6eb3e34 | 1328 | os_memset(data, 0, sizeof(data)); |
6fc6879b JM |
1329 | os_memcpy(data, addr, ETH_ALEN); |
1330 | os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN); | |
5cb9d5c3 JM |
1331 | pos = data + ETH_ALEN + WPA_NONCE_LEN; |
1332 | wpa_get_ntp_timestamp(pos); | |
1333 | pos += 8; | |
c6eb3e34 | 1334 | if (random_get_bytes(pos, gtk_len) < 0) |
3c7302c2 | 1335 | ret = -1; |
6fc6879b | 1336 | |
c6eb3e34 JM |
1337 | #ifdef CONFIG_SHA384 |
1338 | if (sha384_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), | |
1339 | gtk, gtk_len) < 0) | |
3c7302c2 | 1340 | ret = -1; |
c6eb3e34 JM |
1341 | #else /* CONFIG_SHA384 */ |
1342 | #ifdef CONFIG_SHA256 | |
1343 | if (sha256_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), | |
1344 | gtk, gtk_len) < 0) | |
1345 | ret = -1; | |
1346 | #else /* CONFIG_SHA256 */ | |
1347 | if (sha1_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), | |
1348 | gtk, gtk_len) < 0) | |
1349 | ret = -1; | |
1350 | #endif /* CONFIG_SHA256 */ | |
1351 | #endif /* CONFIG_SHA384 */ | |
3c7302c2 JM |
1352 | |
1353 | return ret; | |
6fc6879b JM |
1354 | } |
1355 | ||
1356 | ||
1357 | static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx) | |
1358 | { | |
1359 | struct wpa_authenticator *wpa_auth = eloop_ctx; | |
1360 | struct wpa_state_machine *sm = timeout_ctx; | |
1361 | ||
e4bf4db9 | 1362 | sm->pending_1_of_4_timeout = 0; |
6fc6879b JM |
1363 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout"); |
1364 | sm->TimeoutEvt = TRUE; | |
1365 | wpa_sm_step(sm); | |
1366 | } | |
1367 | ||
1368 | ||
1369 | void __wpa_send_eapol(struct wpa_authenticator *wpa_auth, | |
1370 | struct wpa_state_machine *sm, int key_info, | |
1371 | const u8 *key_rsc, const u8 *nonce, | |
1372 | const u8 *kde, size_t kde_len, | |
1373 | int keyidx, int encr, int force_version) | |
1374 | { | |
1375 | struct ieee802_1x_hdr *hdr; | |
1376 | struct wpa_eapol_key *key; | |
5e3b5197 | 1377 | size_t len, mic_len, keyhdrlen; |
6fc6879b JM |
1378 | int alg; |
1379 | int key_data_len, pad_len = 0; | |
1380 | u8 *buf, *pos; | |
1381 | int version, pairwise; | |
22a299ee | 1382 | int i; |
6d014ffc | 1383 | u8 *key_mic, *key_data; |
6fc6879b | 1384 | |
567da5bb | 1385 | mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len); |
6d014ffc | 1386 | keyhdrlen = sizeof(*key) + mic_len + 2; |
5e3b5197 JM |
1387 | |
1388 | len = sizeof(struct ieee802_1x_hdr) + keyhdrlen; | |
6fc6879b JM |
1389 | |
1390 | if (force_version) | |
1391 | version = force_version; | |
4bc801ab | 1392 | else if (wpa_use_akm_defined(sm->wpa_key_mgmt)) |
a14896e8 | 1393 | version = WPA_KEY_INFO_TYPE_AKM_DEFINED; |
4bc801ab | 1394 | else if (wpa_use_cmac(sm->wpa_key_mgmt)) |
6fc6879b | 1395 | version = WPA_KEY_INFO_TYPE_AES_128_CMAC; |
eb7719ff | 1396 | else if (sm->pairwise != WPA_CIPHER_TKIP) |
6fc6879b JM |
1397 | version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES; |
1398 | else | |
1399 | version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4; | |
1400 | ||
8543ed8a | 1401 | pairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE); |
6fc6879b JM |
1402 | |
1403 | wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d " | |
1404 | "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d " | |
1405 | "encr=%d)", | |
1406 | version, | |
1407 | (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0, | |
1408 | (key_info & WPA_KEY_INFO_MIC) ? 1 : 0, | |
1409 | (key_info & WPA_KEY_INFO_ACK) ? 1 : 0, | |
1410 | (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0, | |
1411 | pairwise, (unsigned long) kde_len, keyidx, encr); | |
1412 | ||
1413 | key_data_len = kde_len; | |
1414 | ||
1415 | if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || | |
4bc801ab | 1416 | wpa_use_aes_key_wrap(sm->wpa_key_mgmt) || |
6fc6879b JM |
1417 | version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) { |
1418 | pad_len = key_data_len % 8; | |
1419 | if (pad_len) | |
1420 | pad_len = 8 - pad_len; | |
1421 | key_data_len += pad_len + 8; | |
1422 | } | |
1423 | ||
1424 | len += key_data_len; | |
b729fd8d JM |
1425 | if (!mic_len && encr) |
1426 | len += AES_BLOCK_SIZE; | |
6fc6879b JM |
1427 | |
1428 | hdr = os_zalloc(len); | |
1429 | if (hdr == NULL) | |
1430 | return; | |
1431 | hdr->version = wpa_auth->conf.eapol_version; | |
1432 | hdr->type = IEEE802_1X_TYPE_EAPOL_KEY; | |
1433 | hdr->length = host_to_be16(len - sizeof(*hdr)); | |
1434 | key = (struct wpa_eapol_key *) (hdr + 1); | |
6d014ffc | 1435 | key_mic = (u8 *) (key + 1); |
5e3b5197 | 1436 | key_data = ((u8 *) (hdr + 1)) + keyhdrlen; |
6fc6879b JM |
1437 | |
1438 | key->type = sm->wpa == WPA_VERSION_WPA2 ? | |
1439 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; | |
1440 | key_info |= version; | |
1441 | if (encr && sm->wpa == WPA_VERSION_WPA2) | |
1442 | key_info |= WPA_KEY_INFO_ENCR_KEY_DATA; | |
1443 | if (sm->wpa != WPA_VERSION_WPA2) | |
1444 | key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT; | |
1445 | WPA_PUT_BE16(key->key_info, key_info); | |
1446 | ||
1447 | alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group; | |
a0bf1b68 | 1448 | if (sm->wpa == WPA_VERSION_WPA2 && !pairwise) |
6fc6879b | 1449 | WPA_PUT_BE16(key->key_length, 0); |
caab23f1 JM |
1450 | else |
1451 | WPA_PUT_BE16(key->key_length, wpa_cipher_key_len(alg)); | |
6fc6879b | 1452 | |
22a299ee JM |
1453 | for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) { |
1454 | sm->key_replay[i].valid = sm->key_replay[i - 1].valid; | |
1455 | os_memcpy(sm->key_replay[i].counter, | |
1456 | sm->key_replay[i - 1].counter, | |
1457 | WPA_REPLAY_COUNTER_LEN); | |
1458 | } | |
1459 | inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN); | |
1460 | os_memcpy(key->replay_counter, sm->key_replay[0].counter, | |
6fc6879b | 1461 | WPA_REPLAY_COUNTER_LEN); |
db099951 JM |
1462 | wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter", |
1463 | key->replay_counter, WPA_REPLAY_COUNTER_LEN); | |
22a299ee | 1464 | sm->key_replay[0].valid = TRUE; |
6fc6879b JM |
1465 | |
1466 | if (nonce) | |
1467 | os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN); | |
1468 | ||
1469 | if (key_rsc) | |
1470 | os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN); | |
1471 | ||
1472 | if (kde && !encr) { | |
5e3b5197 | 1473 | os_memcpy(key_data, kde, kde_len); |
6d014ffc | 1474 | WPA_PUT_BE16(key_mic + mic_len, kde_len); |
b729fd8d | 1475 | #ifdef CONFIG_FILS |
c05f96a3 | 1476 | } else if (!mic_len && kde) { |
b729fd8d JM |
1477 | const u8 *aad[1]; |
1478 | size_t aad_len[1]; | |
1479 | ||
1480 | WPA_PUT_BE16(key_mic, AES_BLOCK_SIZE + kde_len); | |
1481 | wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data", | |
1482 | kde, kde_len); | |
1483 | ||
1484 | wpa_hexdump_key(MSG_DEBUG, "WPA: KEK", | |
1485 | sm->PTK.kek, sm->PTK.kek_len); | |
1486 | /* AES-SIV AAD from EAPOL protocol version field (inclusive) to | |
1487 | * to Key Data (exclusive). */ | |
1488 | aad[0] = (u8 *) hdr; | |
1489 | aad_len[0] = key_mic + 2 - (u8 *) hdr; | |
1490 | if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len, kde, kde_len, | |
1491 | 1, aad, aad_len, key_mic + 2) < 0) { | |
1492 | wpa_printf(MSG_DEBUG, "WPA: AES-SIV encryption failed"); | |
1493 | return; | |
1494 | } | |
1495 | ||
1496 | wpa_hexdump(MSG_DEBUG, "WPA: Encrypted Key Data from SIV", | |
1497 | key_mic + 2, AES_BLOCK_SIZE + kde_len); | |
1498 | #endif /* CONFIG_FILS */ | |
6fc6879b JM |
1499 | } else if (encr && kde) { |
1500 | buf = os_zalloc(key_data_len); | |
1501 | if (buf == NULL) { | |
1502 | os_free(hdr); | |
1503 | return; | |
1504 | } | |
1505 | pos = buf; | |
1506 | os_memcpy(pos, kde, kde_len); | |
1507 | pos += kde_len; | |
1508 | ||
1509 | if (pad_len) | |
1510 | *pos++ = 0xdd; | |
1511 | ||
1512 | wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data", | |
1513 | buf, key_data_len); | |
1514 | if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || | |
4bc801ab | 1515 | wpa_use_aes_key_wrap(sm->wpa_key_mgmt) || |
6fc6879b | 1516 | version == WPA_KEY_INFO_TYPE_AES_128_CMAC) { |
ef9627cb JM |
1517 | wpa_printf(MSG_DEBUG, |
1518 | "WPA: Encrypt Key Data using AES-WRAP (KEK length %u)", | |
1519 | (unsigned int) sm->PTK.kek_len); | |
98cd3d1c | 1520 | if (aes_wrap(sm->PTK.kek, sm->PTK.kek_len, |
5e3b5197 | 1521 | (key_data_len - 8) / 8, buf, key_data)) { |
6fc6879b JM |
1522 | os_free(hdr); |
1523 | os_free(buf); | |
1524 | return; | |
1525 | } | |
6d014ffc | 1526 | WPA_PUT_BE16(key_mic + mic_len, key_data_len); |
7cb53ded | 1527 | #ifndef CONFIG_NO_RC4 |
98cd3d1c | 1528 | } else if (sm->PTK.kek_len == 16) { |
6fc6879b | 1529 | u8 ek[32]; |
ef9627cb JM |
1530 | |
1531 | wpa_printf(MSG_DEBUG, | |
1532 | "WPA: Encrypt Key Data using RC4"); | |
6fc6879b JM |
1533 | os_memcpy(key->key_iv, |
1534 | sm->group->Counter + WPA_NONCE_LEN - 16, 16); | |
1535 | inc_byte_array(sm->group->Counter, WPA_NONCE_LEN); | |
1536 | os_memcpy(ek, key->key_iv, 16); | |
98cd3d1c | 1537 | os_memcpy(ek + 16, sm->PTK.kek, sm->PTK.kek_len); |
5e3b5197 JM |
1538 | os_memcpy(key_data, buf, key_data_len); |
1539 | rc4_skip(ek, 32, 256, key_data, key_data_len); | |
6d014ffc | 1540 | WPA_PUT_BE16(key_mic + mic_len, key_data_len); |
7cb53ded | 1541 | #endif /* CONFIG_NO_RC4 */ |
98cd3d1c JM |
1542 | } else { |
1543 | os_free(hdr); | |
1544 | os_free(buf); | |
1545 | return; | |
6fc6879b JM |
1546 | } |
1547 | os_free(buf); | |
1548 | } | |
1549 | ||
1550 | if (key_info & WPA_KEY_INFO_MIC) { | |
b729fd8d | 1551 | if (!sm->PTK_valid || !mic_len) { |
6fc6879b JM |
1552 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, |
1553 | "PTK not valid when sending EAPOL-Key " | |
1554 | "frame"); | |
1555 | os_free(hdr); | |
1556 | return; | |
1557 | } | |
5e3b5197 | 1558 | |
beae255a JM |
1559 | if (wpa_eapol_key_mic(sm->PTK.kck, sm->PTK.kck_len, |
1560 | sm->wpa_key_mgmt, version, | |
1561 | (u8 *) hdr, len, key_mic) < 0) { | |
1562 | os_free(hdr); | |
1563 | return; | |
1564 | } | |
7af092a0 JB |
1565 | #ifdef CONFIG_TESTING_OPTIONS |
1566 | if (!pairwise && | |
06df2aa6 | 1567 | wpa_auth->conf.corrupt_gtk_rekey_mic_probability > 0.0 && |
7af092a0 JB |
1568 | drand48() < |
1569 | wpa_auth->conf.corrupt_gtk_rekey_mic_probability) { | |
1570 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1571 | "Corrupting group EAPOL-Key Key MIC"); | |
5e3b5197 | 1572 | key_mic[0]++; |
7af092a0 JB |
1573 | } |
1574 | #endif /* CONFIG_TESTING_OPTIONS */ | |
6fc6879b JM |
1575 | } |
1576 | ||
1577 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx, | |
1578 | 1); | |
1579 | wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len, | |
1580 | sm->pairwise_set); | |
1581 | os_free(hdr); | |
1582 | } | |
1583 | ||
1584 | ||
1585 | static void wpa_send_eapol(struct wpa_authenticator *wpa_auth, | |
1586 | struct wpa_state_machine *sm, int key_info, | |
1587 | const u8 *key_rsc, const u8 *nonce, | |
1588 | const u8 *kde, size_t kde_len, | |
1589 | int keyidx, int encr) | |
1590 | { | |
1591 | int timeout_ms; | |
1592 | int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE; | |
41f140d3 | 1593 | u32 ctr; |
6fc6879b JM |
1594 | |
1595 | if (sm == NULL) | |
1596 | return; | |
1597 | ||
1598 | __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len, | |
1599 | keyidx, encr, 0); | |
1600 | ||
bae61562 | 1601 | ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr; |
e4bf4db9 | 1602 | if (ctr == 1 && wpa_auth->conf.tx_status) |
00338a4f JM |
1603 | timeout_ms = pairwise ? eapol_key_timeout_first : |
1604 | eapol_key_timeout_first_group; | |
bae61562 JM |
1605 | else |
1606 | timeout_ms = eapol_key_timeout_subseq; | |
6f234c1e JM |
1607 | if (wpa_auth->conf.wpa_disable_eapol_key_retries && |
1608 | (!pairwise || (key_info & WPA_KEY_INFO_MIC))) | |
1609 | timeout_ms = eapol_key_timeout_no_retrans; | |
e4bf4db9 JM |
1610 | if (pairwise && ctr == 1 && !(key_info & WPA_KEY_INFO_MIC)) |
1611 | sm->pending_1_of_4_timeout = 1; | |
1612 | wpa_printf(MSG_DEBUG, "WPA: Use EAPOL-Key timeout of %u ms (retry " | |
41f140d3 | 1613 | "counter %u)", timeout_ms, ctr); |
6fc6879b JM |
1614 | eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000, |
1615 | wpa_send_eapol_timeout, wpa_auth, sm); | |
1616 | } | |
1617 | ||
1618 | ||
567da5bb JM |
1619 | static int wpa_verify_key_mic(int akmp, size_t pmk_len, struct wpa_ptk *PTK, |
1620 | u8 *data, size_t data_len) | |
6fc6879b JM |
1621 | { |
1622 | struct ieee802_1x_hdr *hdr; | |
1623 | struct wpa_eapol_key *key; | |
1624 | u16 key_info; | |
1625 | int ret = 0; | |
6d014ffc | 1626 | u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN], *mic_pos; |
567da5bb | 1627 | size_t mic_len = wpa_mic_len(akmp, pmk_len); |
6fc6879b JM |
1628 | |
1629 | if (data_len < sizeof(*hdr) + sizeof(*key)) | |
1630 | return -1; | |
1631 | ||
1632 | hdr = (struct ieee802_1x_hdr *) data; | |
1633 | key = (struct wpa_eapol_key *) (hdr + 1); | |
6d014ffc | 1634 | mic_pos = (u8 *) (key + 1); |
6fc6879b | 1635 | key_info = WPA_GET_BE16(key->key_info); |
6d014ffc JM |
1636 | os_memcpy(mic, mic_pos, mic_len); |
1637 | os_memset(mic_pos, 0, mic_len); | |
98cd3d1c JM |
1638 | if (wpa_eapol_key_mic(PTK->kck, PTK->kck_len, akmp, |
1639 | key_info & WPA_KEY_INFO_TYPE_MASK, | |
6d014ffc JM |
1640 | data, data_len, mic_pos) || |
1641 | os_memcmp_const(mic, mic_pos, mic_len) != 0) | |
6fc6879b | 1642 | ret = -1; |
6d014ffc | 1643 | os_memcpy(mic_pos, mic, mic_len); |
6fc6879b JM |
1644 | return ret; |
1645 | } | |
1646 | ||
1647 | ||
1648 | void wpa_remove_ptk(struct wpa_state_machine *sm) | |
1649 | { | |
1650 | sm->PTK_valid = FALSE; | |
1651 | os_memset(&sm->PTK, 0, sizeof(sm->PTK)); | |
2a0b86d3 JM |
1652 | if (wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, NULL, |
1653 | 0)) | |
1654 | wpa_printf(MSG_DEBUG, | |
1655 | "RSN: PTK removal from the driver failed"); | |
6fc6879b | 1656 | sm->pairwise_set = FALSE; |
581a8cde | 1657 | eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm); |
6fc6879b JM |
1658 | } |
1659 | ||
1660 | ||
bb119228 | 1661 | int wpa_auth_sm_event(struct wpa_state_machine *sm, enum wpa_event event) |
6fc6879b | 1662 | { |
5d22a1d5 JM |
1663 | int remove_ptk = 1; |
1664 | ||
6fc6879b | 1665 | if (sm == NULL) |
6f9b5d16 | 1666 | return -1; |
6fc6879b JM |
1667 | |
1668 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
1669 | "event %d notification", event); | |
1670 | ||
1671 | switch (event) { | |
1672 | case WPA_AUTH: | |
c50d94f1 BC |
1673 | #ifdef CONFIG_MESH |
1674 | /* PTKs are derived through AMPE */ | |
1675 | if (wpa_auth_start_ampe(sm->wpa_auth, sm->addr)) { | |
1676 | /* not mesh */ | |
1677 | break; | |
1678 | } | |
1679 | return 0; | |
1680 | #endif /* CONFIG_MESH */ | |
6fc6879b JM |
1681 | case WPA_ASSOC: |
1682 | break; | |
1683 | case WPA_DEAUTH: | |
1684 | case WPA_DISASSOC: | |
1685 | sm->DeauthenticationRequest = TRUE; | |
1686 | break; | |
1687 | case WPA_REAUTH: | |
1688 | case WPA_REAUTH_EAPOL: | |
3ab72b62 JM |
1689 | if (!sm->started) { |
1690 | /* | |
1691 | * When using WPS, we may end up here if the STA | |
1692 | * manages to re-associate without the previous STA | |
1693 | * entry getting removed. Consequently, we need to make | |
1694 | * sure that the WPA state machines gets initialized | |
1695 | * properly at this point. | |
1696 | */ | |
1697 | wpa_printf(MSG_DEBUG, "WPA state machine had not been " | |
1698 | "started - initialize now"); | |
1699 | sm->started = 1; | |
1700 | sm->Init = TRUE; | |
1701 | if (wpa_sm_step(sm) == 1) | |
1702 | return 1; /* should not really happen */ | |
1703 | sm->Init = FALSE; | |
1704 | sm->AuthenticationRequest = TRUE; | |
1705 | break; | |
1706 | } | |
9663596f JM |
1707 | if (sm->GUpdateStationKeys) { |
1708 | /* | |
1709 | * Reauthentication cancels the pending group key | |
1710 | * update for this STA. | |
1711 | */ | |
1712 | sm->group->GKeyDoneStations--; | |
1713 | sm->GUpdateStationKeys = FALSE; | |
1714 | sm->PtkGroupInit = TRUE; | |
1715 | } | |
6fc6879b JM |
1716 | sm->ReAuthenticationRequest = TRUE; |
1717 | break; | |
1718 | case WPA_ASSOC_FT: | |
4ec1fd8e | 1719 | #ifdef CONFIG_IEEE80211R_AP |
81a658d7 JM |
1720 | wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration " |
1721 | "after association"); | |
1722 | wpa_ft_install_ptk(sm); | |
1723 | ||
6fc6879b JM |
1724 | /* Using FT protocol, not WPA auth state machine */ |
1725 | sm->ft_completed = 1; | |
6f9b5d16 | 1726 | return 0; |
4ec1fd8e | 1727 | #else /* CONFIG_IEEE80211R_AP */ |
6fc6879b | 1728 | break; |
4ec1fd8e | 1729 | #endif /* CONFIG_IEEE80211R_AP */ |
957bff83 JM |
1730 | case WPA_ASSOC_FILS: |
1731 | #ifdef CONFIG_FILS | |
1732 | wpa_printf(MSG_DEBUG, | |
1733 | "FILS: TK configuration after association"); | |
1734 | fils_set_tk(sm); | |
1735 | sm->fils_completed = 1; | |
1736 | return 0; | |
1737 | #else /* CONFIG_FILS */ | |
1738 | break; | |
1739 | #endif /* CONFIG_FILS */ | |
0e3bd7ac MV |
1740 | case WPA_DRV_STA_REMOVED: |
1741 | sm->tk_already_set = FALSE; | |
1742 | return 0; | |
6fc6879b JM |
1743 | } |
1744 | ||
4ec1fd8e | 1745 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b | 1746 | sm->ft_completed = 0; |
4ec1fd8e | 1747 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b | 1748 | |
5d22a1d5 JM |
1749 | #ifdef CONFIG_IEEE80211W |
1750 | if (sm->mgmt_frame_prot && event == WPA_AUTH) | |
1751 | remove_ptk = 0; | |
1752 | #endif /* CONFIG_IEEE80211W */ | |
78815f3d | 1753 | #ifdef CONFIG_FILS |
da24c5aa JM |
1754 | if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) && |
1755 | (event == WPA_AUTH || event == WPA_ASSOC)) | |
78815f3d JM |
1756 | remove_ptk = 0; |
1757 | #endif /* CONFIG_FILS */ | |
6fc6879b | 1758 | |
5d22a1d5 JM |
1759 | if (remove_ptk) { |
1760 | sm->PTK_valid = FALSE; | |
1761 | os_memset(&sm->PTK, 0, sizeof(sm->PTK)); | |
1762 | ||
1763 | if (event != WPA_REAUTH_EAPOL) | |
1764 | wpa_remove_ptk(sm); | |
1765 | } | |
6fc6879b | 1766 | |
43f49c37 JM |
1767 | if (sm->in_step_loop) { |
1768 | /* | |
1769 | * wpa_sm_step() is already running - avoid recursive call to | |
1770 | * it by making the existing loop process the new update. | |
1771 | */ | |
1772 | sm->changed = TRUE; | |
1773 | return 0; | |
1774 | } | |
6f9b5d16 | 1775 | return wpa_sm_step(sm); |
6fc6879b JM |
1776 | } |
1777 | ||
1778 | ||
6fc6879b JM |
1779 | SM_STATE(WPA_PTK, INITIALIZE) |
1780 | { | |
1781 | SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk); | |
1782 | if (sm->Init) { | |
1783 | /* Init flag is not cleared here, so avoid busy | |
1784 | * loop by claiming nothing changed. */ | |
1785 | sm->changed = FALSE; | |
1786 | } | |
1787 | ||
1788 | sm->keycount = 0; | |
1789 | if (sm->GUpdateStationKeys) | |
1790 | sm->group->GKeyDoneStations--; | |
1791 | sm->GUpdateStationKeys = FALSE; | |
1792 | if (sm->wpa == WPA_VERSION_WPA) | |
1793 | sm->PInitAKeys = FALSE; | |
1794 | if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and | |
1795 | * Local AA > Remote AA)) */) { | |
1796 | sm->Pair = TRUE; | |
1797 | } | |
1798 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0); | |
1799 | wpa_remove_ptk(sm); | |
1800 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0); | |
1801 | sm->TimeoutCtr = 0; | |
a1ea1b45 | 1802 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) || |
567da5bb | 1803 | sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP || |
a1ea1b45 | 1804 | sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) { |
6fc6879b JM |
1805 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, |
1806 | WPA_EAPOL_authorized, 0); | |
1807 | } | |
1808 | } | |
1809 | ||
1810 | ||
1811 | SM_STATE(WPA_PTK, DISCONNECT) | |
1812 | { | |
567da5bb JM |
1813 | u16 reason = sm->disconnect_reason; |
1814 | ||
6fc6879b JM |
1815 | SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk); |
1816 | sm->Disconnect = FALSE; | |
567da5bb JM |
1817 | sm->disconnect_reason = 0; |
1818 | if (!reason) | |
1819 | reason = WLAN_REASON_PREV_AUTH_NOT_VALID; | |
1820 | wpa_sta_disconnect(sm->wpa_auth, sm->addr, reason); | |
6fc6879b JM |
1821 | } |
1822 | ||
1823 | ||
1824 | SM_STATE(WPA_PTK, DISCONNECTED) | |
1825 | { | |
1826 | SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk); | |
1827 | sm->DeauthenticationRequest = FALSE; | |
1828 | } | |
1829 | ||
1830 | ||
1831 | SM_STATE(WPA_PTK, AUTHENTICATION) | |
1832 | { | |
1833 | SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk); | |
1834 | os_memset(&sm->PTK, 0, sizeof(sm->PTK)); | |
1835 | sm->PTK_valid = FALSE; | |
1836 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto, | |
1837 | 1); | |
1838 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1); | |
1839 | sm->AuthenticationRequest = FALSE; | |
1840 | } | |
1841 | ||
1842 | ||
40d00d2b NC |
1843 | static void wpa_group_ensure_init(struct wpa_authenticator *wpa_auth, |
1844 | struct wpa_group *group) | |
1bdb7ab3 | 1845 | { |
40d00d2b NC |
1846 | if (group->first_sta_seen) |
1847 | return; | |
1bdb7ab3 JM |
1848 | /* |
1849 | * System has run bit further than at the time hostapd was started | |
1850 | * potentially very early during boot up. This provides better chances | |
1851 | * of collecting more randomness on embedded systems. Re-initialize the | |
1852 | * GMK and Counter here to improve their strength if there was not | |
1853 | * enough entropy available immediately after system startup. | |
1854 | */ | |
1855 | wpa_printf(MSG_DEBUG, "WPA: Re-initialize GMK/Counter on first " | |
1856 | "station"); | |
08704cd8 JM |
1857 | if (random_pool_ready() != 1) { |
1858 | wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool " | |
1859 | "to proceed - reject first 4-way handshake"); | |
1860 | group->reject_4way_hs_for_entropy = TRUE; | |
40d00d2b NC |
1861 | } else { |
1862 | group->first_sta_seen = TRUE; | |
1863 | group->reject_4way_hs_for_entropy = FALSE; | |
08704cd8 | 1864 | } |
40d00d2b | 1865 | |
aac1efec JM |
1866 | if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0 || |
1867 | wpa_gtk_update(wpa_auth, group) < 0 || | |
1868 | wpa_group_config_group_keys(wpa_auth, group) < 0) { | |
1869 | wpa_printf(MSG_INFO, "WPA: GMK/GTK setup failed"); | |
1870 | group->first_sta_seen = FALSE; | |
1871 | group->reject_4way_hs_for_entropy = TRUE; | |
1872 | } | |
1bdb7ab3 JM |
1873 | } |
1874 | ||
1875 | ||
6fc6879b JM |
1876 | SM_STATE(WPA_PTK, AUTHENTICATION2) |
1877 | { | |
1878 | SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk); | |
1bdb7ab3 | 1879 | |
40d00d2b | 1880 | wpa_group_ensure_init(sm->wpa_auth, sm->group); |
65a32cdb | 1881 | sm->ReAuthenticationRequest = FALSE; |
1bdb7ab3 | 1882 | |
3825a19b JM |
1883 | /* |
1884 | * Definition of ANonce selection in IEEE Std 802.11i-2004 is somewhat | |
1885 | * ambiguous. The Authenticator state machine uses a counter that is | |
1886 | * incremented by one for each 4-way handshake. However, the security | |
1887 | * analysis of 4-way handshake points out that unpredictable nonces | |
1888 | * help in preventing precomputation attacks. Instead of the state | |
1889 | * machine definition, use an unpredictable nonce value here to provide | |
1890 | * stronger protection against potential precomputation attacks. | |
1891 | */ | |
1892 | if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) { | |
1893 | wpa_printf(MSG_ERROR, "WPA: Failed to get random data for " | |
1894 | "ANonce."); | |
65a32cdb | 1895 | sm->Disconnect = TRUE; |
3825a19b JM |
1896 | return; |
1897 | } | |
bc8318ac JM |
1898 | wpa_hexdump(MSG_DEBUG, "WPA: Assign ANonce", sm->ANonce, |
1899 | WPA_NONCE_LEN); | |
6fc6879b JM |
1900 | /* IEEE 802.11i does not clear TimeoutCtr here, but this is more |
1901 | * logical place than INITIALIZE since AUTHENTICATION2 can be | |
1902 | * re-entered on ReAuthenticationRequest without going through | |
1903 | * INITIALIZE. */ | |
1904 | sm->TimeoutCtr = 0; | |
1905 | } | |
1906 | ||
1907 | ||
0adc9b28 JM |
1908 | static int wpa_auth_sm_ptk_update(struct wpa_state_machine *sm) |
1909 | { | |
1910 | if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) { | |
1911 | wpa_printf(MSG_ERROR, | |
1912 | "WPA: Failed to get random data for ANonce"); | |
1913 | sm->Disconnect = TRUE; | |
1914 | return -1; | |
1915 | } | |
1916 | wpa_hexdump(MSG_DEBUG, "WPA: Assign new ANonce", sm->ANonce, | |
1917 | WPA_NONCE_LEN); | |
1918 | sm->TimeoutCtr = 0; | |
1919 | return 0; | |
1920 | } | |
1921 | ||
1922 | ||
6fc6879b JM |
1923 | SM_STATE(WPA_PTK, INITPMK) |
1924 | { | |
1925 | u8 msk[2 * PMK_LEN]; | |
1926 | size_t len = 2 * PMK_LEN; | |
1927 | ||
1928 | SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk); | |
4ec1fd8e | 1929 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b | 1930 | sm->xxkey_len = 0; |
4ec1fd8e | 1931 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b JM |
1932 | if (sm->pmksa) { |
1933 | wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache"); | |
207976f0 JM |
1934 | os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len); |
1935 | sm->pmk_len = sm->pmksa->pmk_len; | |
567da5bb JM |
1936 | #ifdef CONFIG_DPP |
1937 | } else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP) { | |
1938 | wpa_printf(MSG_DEBUG, | |
1939 | "DPP: No PMKSA cache entry for STA - reject connection"); | |
1940 | sm->Disconnect = TRUE; | |
1941 | sm->disconnect_reason = WLAN_REASON_INVALID_PMKID; | |
1942 | return; | |
1943 | #endif /* CONFIG_DPP */ | |
6fc6879b | 1944 | } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) { |
207976f0 JM |
1945 | unsigned int pmk_len; |
1946 | ||
834c5d68 | 1947 | if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) |
207976f0 JM |
1948 | pmk_len = PMK_LEN_SUITE_B_192; |
1949 | else | |
1950 | pmk_len = PMK_LEN; | |
6fc6879b | 1951 | wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine " |
207976f0 JM |
1952 | "(MSK len=%lu PMK len=%u)", (unsigned long) len, |
1953 | pmk_len); | |
1954 | if (len < pmk_len) { | |
1955 | wpa_printf(MSG_DEBUG, | |
1956 | "WPA: MSK not long enough (%u) to create PMK (%u)", | |
1957 | (unsigned int) len, (unsigned int) pmk_len); | |
1958 | sm->Disconnect = TRUE; | |
1959 | return; | |
1960 | } | |
1961 | os_memcpy(sm->PMK, msk, pmk_len); | |
1962 | sm->pmk_len = pmk_len; | |
4ec1fd8e | 1963 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b | 1964 | if (len >= 2 * PMK_LEN) { |
9f12271b JM |
1965 | if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) { |
1966 | os_memcpy(sm->xxkey, msk, SHA384_MAC_LEN); | |
1967 | sm->xxkey_len = SHA384_MAC_LEN; | |
1968 | } else { | |
1969 | os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN); | |
1970 | sm->xxkey_len = PMK_LEN; | |
1971 | } | |
6fc6879b | 1972 | } |
4ec1fd8e | 1973 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b | 1974 | } else { |
400de9b1 | 1975 | wpa_printf(MSG_DEBUG, "WPA: Could not get PMK, get_msk: %p", |
cef8fac0 | 1976 | sm->wpa_auth->cb->get_msk); |
1180dd66 JM |
1977 | sm->Disconnect = TRUE; |
1978 | return; | |
6fc6879b | 1979 | } |
40aaa64f | 1980 | os_memset(msk, 0, sizeof(msk)); |
6fc6879b JM |
1981 | |
1982 | sm->req_replay_counter_used = 0; | |
1983 | /* IEEE 802.11i does not set keyRun to FALSE, but not doing this | |
1984 | * will break reauthentication since EAPOL state machines may not be | |
1985 | * get into AUTHENTICATING state that clears keyRun before WPA state | |
1986 | * machine enters AUTHENTICATION2 state and goes immediately to INITPMK | |
1987 | * state and takes PMK from the previously used AAA Key. This will | |
1988 | * eventually fail in 4-Way Handshake because Supplicant uses PMK | |
1989 | * derived from the new AAA Key. Setting keyRun = FALSE here seems to | |
1990 | * be good workaround for this issue. */ | |
1991 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0); | |
1992 | } | |
1993 | ||
1994 | ||
1995 | SM_STATE(WPA_PTK, INITPSK) | |
1996 | { | |
1997 | const u8 *psk; | |
7a12edd1 JM |
1998 | size_t psk_len; |
1999 | ||
6fc6879b | 2000 | SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk); |
7a12edd1 JM |
2001 | psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr, NULL, |
2002 | &psk_len); | |
6fc6879b | 2003 | if (psk) { |
7a12edd1 JM |
2004 | os_memcpy(sm->PMK, psk, psk_len); |
2005 | sm->pmk_len = psk_len; | |
4ec1fd8e | 2006 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b JM |
2007 | os_memcpy(sm->xxkey, psk, PMK_LEN); |
2008 | sm->xxkey_len = PMK_LEN; | |
4ec1fd8e | 2009 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b | 2010 | } |
e61fea6b JM |
2011 | #ifdef CONFIG_SAE |
2012 | if (wpa_auth_uses_sae(sm) && sm->pmksa) { | |
2013 | wpa_printf(MSG_DEBUG, "SAE: PMK from PMKSA cache"); | |
2014 | os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len); | |
2015 | sm->pmk_len = sm->pmksa->pmk_len; | |
2016 | } | |
2017 | #endif /* CONFIG_SAE */ | |
6fc6879b JM |
2018 | sm->req_replay_counter_used = 0; |
2019 | } | |
2020 | ||
2021 | ||
2022 | SM_STATE(WPA_PTK, PTKSTART) | |
2023 | { | |
2024 | u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL; | |
2025 | size_t pmkid_len = 0; | |
2026 | ||
2027 | SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk); | |
2028 | sm->PTKRequest = FALSE; | |
2029 | sm->TimeoutEvt = FALSE; | |
f23c5b17 | 2030 | sm->alt_snonce_valid = FALSE; |
bae61562 JM |
2031 | |
2032 | sm->TimeoutCtr++; | |
41f140d3 | 2033 | if (sm->TimeoutCtr > sm->wpa_auth->conf.wpa_pairwise_update_count) { |
bae61562 JM |
2034 | /* No point in sending the EAPOL-Key - we will disconnect |
2035 | * immediately following this. */ | |
2036 | return; | |
2037 | } | |
2038 | ||
6fc6879b JM |
2039 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, |
2040 | "sending 1/4 msg of 4-Way Handshake"); | |
2041 | /* | |
c6e1a9a0 JM |
2042 | * For infrastructure BSS cases, it is better for the AP not to include |
2043 | * the PMKID KDE in EAPOL-Key msg 1/4 since it could be used to initiate | |
2044 | * offline search for the passphrase/PSK without having to be able to | |
2045 | * capture a 4-way handshake from a STA that has access to the network. | |
2046 | * | |
2047 | * For IBSS cases, addition of PMKID KDE could be considered even with | |
2048 | * WPA2-PSK cases that use multiple PSKs, but only if there is a single | |
2049 | * possible PSK for this STA. However, this should not be done unless | |
2050 | * there is support for using that information on the supplicant side. | |
2051 | * The concern about exposing PMKID unnecessarily in infrastructure BSS | |
2052 | * cases would also apply here, but at least in the IBSS case, this | |
2053 | * would cover a potential real use case. | |
6fc6879b JM |
2054 | */ |
2055 | if (sm->wpa == WPA_VERSION_WPA2 && | |
e61fea6b | 2056 | (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) || |
d90f10fa | 2057 | (sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE && sm->pmksa) || |
e61fea6b | 2058 | wpa_key_mgmt_sae(sm->wpa_key_mgmt)) && |
a14896e8 | 2059 | sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN) { |
6fc6879b JM |
2060 | pmkid = buf; |
2061 | pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN; | |
2062 | pmkid[0] = WLAN_EID_VENDOR_SPECIFIC; | |
2063 | pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN; | |
2064 | RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID); | |
929a2ea5 | 2065 | if (sm->pmksa) { |
9d94e4bb JM |
2066 | wpa_hexdump(MSG_DEBUG, |
2067 | "RSN: Message 1/4 PMKID from PMKSA entry", | |
2068 | sm->pmksa->pmkid, PMKID_LEN); | |
6fc6879b JM |
2069 | os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN], |
2070 | sm->pmksa->pmkid, PMKID_LEN); | |
929a2ea5 JM |
2071 | } else if (wpa_key_mgmt_suite_b(sm->wpa_key_mgmt)) { |
2072 | /* No KCK available to derive PMKID */ | |
9d94e4bb JM |
2073 | wpa_printf(MSG_DEBUG, |
2074 | "RSN: No KCK available to derive PMKID for message 1/4"); | |
929a2ea5 | 2075 | pmkid = NULL; |
9d94e4bb JM |
2076 | #ifdef CONFIG_SAE |
2077 | } else if (wpa_key_mgmt_sae(sm->wpa_key_mgmt)) { | |
2078 | if (sm->pmkid_set) { | |
2079 | wpa_hexdump(MSG_DEBUG, | |
2080 | "RSN: Message 1/4 PMKID from SAE", | |
2081 | sm->pmkid, PMKID_LEN); | |
2082 | os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN], | |
2083 | sm->pmkid, PMKID_LEN); | |
2084 | } else { | |
2085 | /* No PMKID available */ | |
2086 | wpa_printf(MSG_DEBUG, | |
2087 | "RSN: No SAE PMKID available for message 1/4"); | |
2088 | pmkid = NULL; | |
2089 | } | |
2090 | #endif /* CONFIG_SAE */ | |
929a2ea5 | 2091 | } else { |
6fc6879b JM |
2092 | /* |
2093 | * Calculate PMKID since no PMKSA cache entry was | |
2094 | * available with pre-calculated PMKID. | |
2095 | */ | |
207976f0 | 2096 | rsn_pmkid(sm->PMK, sm->pmk_len, sm->wpa_auth->addr, |
56586197 | 2097 | sm->addr, &pmkid[2 + RSN_SELECTOR_LEN], |
41b81914 | 2098 | sm->wpa_key_mgmt); |
9d94e4bb JM |
2099 | wpa_hexdump(MSG_DEBUG, |
2100 | "RSN: Message 1/4 PMKID derived from PMK", | |
2101 | &pmkid[2 + RSN_SELECTOR_LEN], PMKID_LEN); | |
6fc6879b JM |
2102 | } |
2103 | } | |
2104 | wpa_send_eapol(sm->wpa_auth, sm, | |
2105 | WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL, | |
2106 | sm->ANonce, pmkid, pmkid_len, 0, 0); | |
6fc6879b JM |
2107 | } |
2108 | ||
2109 | ||
f23c5b17 | 2110 | static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce, |
207976f0 JM |
2111 | const u8 *pmk, unsigned int pmk_len, |
2112 | struct wpa_ptk *ptk) | |
6fc6879b | 2113 | { |
4ec1fd8e | 2114 | #ifdef CONFIG_IEEE80211R_AP |
56586197 | 2115 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) |
98cd3d1c | 2116 | return wpa_auth_derive_ptk_ft(sm, pmk, ptk); |
4ec1fd8e | 2117 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b | 2118 | |
207976f0 | 2119 | return wpa_pmk_to_ptk(pmk, pmk_len, "Pairwise key expansion", |
98cd3d1c JM |
2120 | sm->wpa_auth->addr, sm->addr, sm->ANonce, snonce, |
2121 | ptk, sm->wpa_key_mgmt, sm->pairwise); | |
6fc6879b JM |
2122 | } |
2123 | ||
2124 | ||
3b5b7aa8 | 2125 | #ifdef CONFIG_FILS |
c4fd6d8a JM |
2126 | |
2127 | int fils_auth_pmk_to_ptk(struct wpa_state_machine *sm, const u8 *pmk, | |
80ddf5d9 | 2128 | size_t pmk_len, const u8 *snonce, const u8 *anonce, |
4cada9dc | 2129 | const u8 *dhss, size_t dhss_len, |
80ddf5d9 | 2130 | struct wpabuf *g_sta, struct wpabuf *g_ap) |
c4fd6d8a JM |
2131 | { |
2132 | u8 ick[FILS_ICK_MAX_LEN]; | |
2133 | size_t ick_len; | |
2134 | int res; | |
8fed47e0 JM |
2135 | u8 fils_ft[FILS_FT_MAX_LEN]; |
2136 | size_t fils_ft_len = 0; | |
c4fd6d8a JM |
2137 | |
2138 | res = fils_pmk_to_ptk(pmk, pmk_len, sm->addr, sm->wpa_auth->addr, | |
4cada9dc JM |
2139 | snonce, anonce, dhss, dhss_len, |
2140 | &sm->PTK, ick, &ick_len, | |
8fed47e0 JM |
2141 | sm->wpa_key_mgmt, sm->pairwise, |
2142 | fils_ft, &fils_ft_len); | |
c4fd6d8a JM |
2143 | if (res < 0) |
2144 | return res; | |
2145 | sm->PTK_valid = TRUE; | |
2f1357fb | 2146 | sm->tk_already_set = FALSE; |
c4fd6d8a | 2147 | |
8fed47e0 JM |
2148 | #ifdef CONFIG_IEEE80211R_AP |
2149 | if (fils_ft_len) { | |
2150 | struct wpa_authenticator *wpa_auth = sm->wpa_auth; | |
2151 | struct wpa_auth_config *conf = &wpa_auth->conf; | |
994eac7e JM |
2152 | u8 pmk_r0[PMK_LEN_MAX], pmk_r0_name[WPA_PMK_NAME_LEN]; |
2153 | int use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt); | |
2154 | size_t pmk_r0_len = use_sha384 ? SHA384_MAC_LEN : PMK_LEN; | |
8fed47e0 JM |
2155 | |
2156 | if (wpa_derive_pmk_r0(fils_ft, fils_ft_len, | |
2157 | conf->ssid, conf->ssid_len, | |
2158 | conf->mobility_domain, | |
2159 | conf->r0_key_holder, | |
2160 | conf->r0_key_holder_len, | |
994eac7e JM |
2161 | sm->addr, pmk_r0, pmk_r0_name, |
2162 | use_sha384) < 0) | |
8fed47e0 JM |
2163 | return -1; |
2164 | ||
994eac7e JM |
2165 | wpa_hexdump_key(MSG_DEBUG, "FILS+FT: PMK-R0", |
2166 | pmk_r0, pmk_r0_len); | |
8fed47e0 JM |
2167 | wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR0Name", |
2168 | pmk_r0_name, WPA_PMK_NAME_LEN); | |
89dea17e | 2169 | wpa_ft_store_pmk_fils(sm, pmk_r0, pmk_r0_name); |
8fed47e0 JM |
2170 | os_memset(fils_ft, 0, sizeof(fils_ft)); |
2171 | } | |
2172 | #endif /* CONFIG_IEEE80211R_AP */ | |
2173 | ||
c4fd6d8a JM |
2174 | res = fils_key_auth_sk(ick, ick_len, snonce, anonce, |
2175 | sm->addr, sm->wpa_auth->addr, | |
80ddf5d9 JM |
2176 | g_sta ? wpabuf_head(g_sta) : NULL, |
2177 | g_sta ? wpabuf_len(g_sta) : 0, | |
2178 | g_ap ? wpabuf_head(g_ap) : NULL, | |
2179 | g_ap ? wpabuf_len(g_ap) : 0, | |
c4fd6d8a JM |
2180 | sm->wpa_key_mgmt, sm->fils_key_auth_sta, |
2181 | sm->fils_key_auth_ap, | |
2182 | &sm->fils_key_auth_len); | |
2183 | os_memset(ick, 0, sizeof(ick)); | |
78815f3d JM |
2184 | |
2185 | /* Store nonces for (Re)Association Request/Response frame processing */ | |
2186 | os_memcpy(sm->SNonce, snonce, FILS_NONCE_LEN); | |
2187 | os_memcpy(sm->ANonce, anonce, FILS_NONCE_LEN); | |
2188 | ||
c4fd6d8a JM |
2189 | return res; |
2190 | } | |
2191 | ||
2192 | ||
3b5b7aa8 | 2193 | static int wpa_aead_decrypt(struct wpa_state_machine *sm, struct wpa_ptk *ptk, |
75c8563e | 2194 | u8 *buf, size_t buf_len, u16 *_key_data_len) |
3b5b7aa8 JM |
2195 | { |
2196 | struct ieee802_1x_hdr *hdr; | |
2197 | struct wpa_eapol_key *key; | |
2198 | u8 *pos; | |
2199 | u16 key_data_len; | |
2200 | u8 *tmp; | |
2201 | const u8 *aad[1]; | |
2202 | size_t aad_len[1]; | |
2203 | ||
75c8563e | 2204 | hdr = (struct ieee802_1x_hdr *) buf; |
3b5b7aa8 JM |
2205 | key = (struct wpa_eapol_key *) (hdr + 1); |
2206 | pos = (u8 *) (key + 1); | |
2207 | key_data_len = WPA_GET_BE16(pos); | |
2208 | if (key_data_len < AES_BLOCK_SIZE || | |
2209 | key_data_len > buf_len - sizeof(*hdr) - sizeof(*key) - 2) { | |
2210 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO, | |
2211 | "No room for AES-SIV data in the frame"); | |
2212 | return -1; | |
2213 | } | |
2214 | pos += 2; /* Pointing at the Encrypted Key Data field */ | |
2215 | ||
2216 | tmp = os_malloc(key_data_len); | |
2217 | if (!tmp) | |
2218 | return -1; | |
2219 | ||
2220 | /* AES-SIV AAD from EAPOL protocol version field (inclusive) to | |
2221 | * to Key Data (exclusive). */ | |
75c8563e JM |
2222 | aad[0] = buf; |
2223 | aad_len[0] = pos - buf; | |
3b5b7aa8 JM |
2224 | if (aes_siv_decrypt(ptk->kek, ptk->kek_len, pos, key_data_len, |
2225 | 1, aad, aad_len, tmp) < 0) { | |
2226 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO, | |
2227 | "Invalid AES-SIV data in the frame"); | |
2228 | bin_clear_free(tmp, key_data_len); | |
2229 | return -1; | |
2230 | } | |
2231 | ||
2232 | /* AEAD decryption and validation completed successfully */ | |
2233 | key_data_len -= AES_BLOCK_SIZE; | |
2234 | wpa_hexdump_key(MSG_DEBUG, "WPA: Decrypted Key Data", | |
2235 | tmp, key_data_len); | |
2236 | ||
2237 | /* Replace Key Data field with the decrypted version */ | |
2238 | os_memcpy(pos, tmp, key_data_len); | |
2239 | pos -= 2; /* Key Data Length field */ | |
2240 | WPA_PUT_BE16(pos, key_data_len); | |
2241 | bin_clear_free(tmp, key_data_len); | |
2242 | if (_key_data_len) | |
2243 | *_key_data_len = key_data_len; | |
2244 | return 0; | |
2245 | } | |
78815f3d JM |
2246 | |
2247 | ||
087631b9 JM |
2248 | const u8 * wpa_fils_validate_fils_session(struct wpa_state_machine *sm, |
2249 | const u8 *ies, size_t ies_len, | |
2250 | const u8 *fils_session) | |
2251 | { | |
2252 | const u8 *ie, *end; | |
2253 | const u8 *session = NULL; | |
2254 | ||
2255 | if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt)) { | |
2256 | wpa_printf(MSG_DEBUG, | |
2257 | "FILS: Not a FILS AKM - reject association"); | |
2258 | return NULL; | |
2259 | } | |
2260 | ||
2261 | /* Verify Session element */ | |
2262 | ie = ies; | |
2263 | end = ((const u8 *) ie) + ies_len; | |
2264 | while (ie + 1 < end) { | |
2265 | if (ie + 2 + ie[1] > end) | |
2266 | break; | |
2267 | if (ie[0] == WLAN_EID_EXTENSION && | |
2268 | ie[1] >= 1 + FILS_SESSION_LEN && | |
2269 | ie[2] == WLAN_EID_EXT_FILS_SESSION) { | |
2270 | session = ie; | |
2271 | break; | |
2272 | } | |
2273 | ie += 2 + ie[1]; | |
2274 | } | |
2275 | ||
2276 | if (!session) { | |
2277 | wpa_printf(MSG_DEBUG, | |
2278 | "FILS: %s: Could not find FILS Session element in Assoc Req - reject", | |
2279 | __func__); | |
2280 | return NULL; | |
2281 | } | |
2282 | ||
2283 | if (!fils_session) { | |
2284 | wpa_printf(MSG_DEBUG, | |
2285 | "FILS: %s: Could not find FILS Session element in STA entry - reject", | |
2286 | __func__); | |
2287 | return NULL; | |
2288 | } | |
2289 | ||
2290 | if (os_memcmp(fils_session, session + 3, FILS_SESSION_LEN) != 0) { | |
2291 | wpa_printf(MSG_DEBUG, "FILS: Session mismatch"); | |
2292 | wpa_hexdump(MSG_DEBUG, "FILS: Expected FILS Session", | |
2293 | fils_session, FILS_SESSION_LEN); | |
2294 | wpa_hexdump(MSG_DEBUG, "FILS: Received FILS Session", | |
2295 | session + 3, FILS_SESSION_LEN); | |
2296 | return NULL; | |
2297 | } | |
2298 | return session; | |
2299 | } | |
2300 | ||
2301 | ||
bd599353 JM |
2302 | int wpa_fils_validate_key_confirm(struct wpa_state_machine *sm, const u8 *ies, |
2303 | size_t ies_len) | |
2304 | { | |
2305 | struct ieee802_11_elems elems; | |
2306 | ||
2307 | if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) { | |
2308 | wpa_printf(MSG_DEBUG, | |
2309 | "FILS: Failed to parse decrypted elements"); | |
2310 | return -1; | |
2311 | } | |
2312 | ||
8b5ddda5 JM |
2313 | if (!elems.fils_session) { |
2314 | wpa_printf(MSG_DEBUG, "FILS: No FILS Session element"); | |
2315 | return -1; | |
2316 | } | |
2317 | ||
bd599353 JM |
2318 | if (!elems.fils_key_confirm) { |
2319 | wpa_printf(MSG_DEBUG, "FILS: No FILS Key Confirm element"); | |
2320 | return -1; | |
2321 | } | |
2322 | ||
2323 | if (elems.fils_key_confirm_len != sm->fils_key_auth_len) { | |
2324 | wpa_printf(MSG_DEBUG, | |
2325 | "FILS: Unexpected Key-Auth length %d (expected %d)", | |
2326 | elems.fils_key_confirm_len, | |
2327 | (int) sm->fils_key_auth_len); | |
2328 | return -1; | |
2329 | } | |
2330 | ||
2331 | if (os_memcmp(elems.fils_key_confirm, sm->fils_key_auth_sta, | |
2332 | sm->fils_key_auth_len) != 0) { | |
2333 | wpa_printf(MSG_DEBUG, "FILS: Key-Auth mismatch"); | |
2334 | wpa_hexdump(MSG_DEBUG, "FILS: Received Key-Auth", | |
2335 | elems.fils_key_confirm, elems.fils_key_confirm_len); | |
2336 | wpa_hexdump(MSG_DEBUG, "FILS: Expected Key-Auth", | |
2337 | sm->fils_key_auth_sta, sm->fils_key_auth_len); | |
2338 | return -1; | |
2339 | } | |
2340 | ||
2341 | return 0; | |
2342 | } | |
2343 | ||
2344 | ||
78815f3d JM |
2345 | int fils_decrypt_assoc(struct wpa_state_machine *sm, const u8 *fils_session, |
2346 | const struct ieee80211_mgmt *mgmt, size_t frame_len, | |
2347 | u8 *pos, size_t left) | |
2348 | { | |
2349 | u16 fc, stype; | |
2350 | const u8 *end, *ie_start, *ie, *session, *crypt; | |
78815f3d JM |
2351 | const u8 *aad[5]; |
2352 | size_t aad_len[5]; | |
2353 | ||
2354 | if (!sm || !sm->PTK_valid) { | |
2355 | wpa_printf(MSG_DEBUG, | |
2356 | "FILS: No KEK to decrypt Assocication Request frame"); | |
2357 | return -1; | |
2358 | } | |
2359 | ||
2360 | if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt)) { | |
2361 | wpa_printf(MSG_DEBUG, | |
2362 | "FILS: Not a FILS AKM - reject association"); | |
2363 | return -1; | |
2364 | } | |
2365 | ||
2366 | end = ((const u8 *) mgmt) + frame_len; | |
2367 | fc = le_to_host16(mgmt->frame_control); | |
2368 | stype = WLAN_FC_GET_STYPE(fc); | |
2369 | if (stype == WLAN_FC_STYPE_REASSOC_REQ) | |
2370 | ie_start = mgmt->u.reassoc_req.variable; | |
2371 | else | |
2372 | ie_start = mgmt->u.assoc_req.variable; | |
2373 | ie = ie_start; | |
2374 | ||
2375 | /* | |
2376 | * Find FILS Session element which is the last unencrypted element in | |
2377 | * the frame. | |
2378 | */ | |
087631b9 JM |
2379 | session = wpa_fils_validate_fils_session(sm, ie, end - ie, |
2380 | fils_session); | |
78815f3d | 2381 | if (!session) { |
087631b9 | 2382 | wpa_printf(MSG_DEBUG, "FILS: Session validation failed"); |
78815f3d JM |
2383 | return -1; |
2384 | } | |
087631b9 | 2385 | |
78815f3d JM |
2386 | crypt = session + 2 + session[1]; |
2387 | ||
2388 | if (end - crypt < AES_BLOCK_SIZE) { | |
2389 | wpa_printf(MSG_DEBUG, | |
2390 | "FILS: Too short frame to include AES-SIV data"); | |
2391 | return -1; | |
2392 | } | |
2393 | ||
2394 | /* AES-SIV AAD vectors */ | |
2395 | ||
2396 | /* The STA's MAC address */ | |
2397 | aad[0] = mgmt->sa; | |
2398 | aad_len[0] = ETH_ALEN; | |
2399 | /* The AP's BSSID */ | |
2400 | aad[1] = mgmt->da; | |
2401 | aad_len[1] = ETH_ALEN; | |
2402 | /* The STA's nonce */ | |
2403 | aad[2] = sm->SNonce; | |
2404 | aad_len[2] = FILS_NONCE_LEN; | |
2405 | /* The AP's nonce */ | |
2406 | aad[3] = sm->ANonce; | |
2407 | aad_len[3] = FILS_NONCE_LEN; | |
2408 | /* | |
2409 | * The (Re)Association Request frame from the Capability Information | |
2410 | * field to the FILS Session element (both inclusive). | |
2411 | */ | |
2412 | aad[4] = (const u8 *) &mgmt->u.assoc_req.capab_info; | |
d77f3304 | 2413 | aad_len[4] = crypt - aad[4]; |
78815f3d JM |
2414 | |
2415 | if (aes_siv_decrypt(sm->PTK.kek, sm->PTK.kek_len, crypt, end - crypt, | |
d77f3304 | 2416 | 5, aad, aad_len, pos + (crypt - ie_start)) < 0) { |
78815f3d JM |
2417 | wpa_printf(MSG_DEBUG, |
2418 | "FILS: Invalid AES-SIV data in the frame"); | |
2419 | return -1; | |
2420 | } | |
2421 | wpa_hexdump(MSG_DEBUG, "FILS: Decrypted Association Request elements", | |
2422 | pos, left - AES_BLOCK_SIZE); | |
2423 | ||
bd599353 JM |
2424 | if (wpa_fils_validate_key_confirm(sm, pos, left - AES_BLOCK_SIZE) < 0) { |
2425 | wpa_printf(MSG_DEBUG, "FILS: Key Confirm validation failed"); | |
78815f3d JM |
2426 | return -1; |
2427 | } | |
2428 | ||
2429 | return left - AES_BLOCK_SIZE; | |
2430 | } | |
2431 | ||
e73ffa09 JM |
2432 | |
2433 | int fils_encrypt_assoc(struct wpa_state_machine *sm, u8 *buf, | |
91d91abf JM |
2434 | size_t current_len, size_t max_len, |
2435 | const struct wpabuf *hlp) | |
e73ffa09 JM |
2436 | { |
2437 | u8 *end = buf + max_len; | |
2438 | u8 *pos = buf + current_len; | |
2439 | struct ieee80211_mgmt *mgmt; | |
2440 | struct wpabuf *plain; | |
e73ffa09 JM |
2441 | const u8 *aad[5]; |
2442 | size_t aad_len[5]; | |
2443 | ||
2444 | if (!sm || !sm->PTK_valid) | |
2445 | return -1; | |
2446 | ||
2447 | wpa_hexdump(MSG_DEBUG, | |
2448 | "FILS: Association Response frame before FILS processing", | |
2449 | buf, current_len); | |
2450 | ||
2451 | mgmt = (struct ieee80211_mgmt *) buf; | |
2452 | ||
2453 | /* AES-SIV AAD vectors */ | |
2454 | ||
2455 | /* The AP's BSSID */ | |
2456 | aad[0] = mgmt->sa; | |
2457 | aad_len[0] = ETH_ALEN; | |
2458 | /* The STA's MAC address */ | |
2459 | aad[1] = mgmt->da; | |
2460 | aad_len[1] = ETH_ALEN; | |
2461 | /* The AP's nonce */ | |
2462 | aad[2] = sm->ANonce; | |
2463 | aad_len[2] = FILS_NONCE_LEN; | |
2464 | /* The STA's nonce */ | |
2465 | aad[3] = sm->SNonce; | |
2466 | aad_len[3] = FILS_NONCE_LEN; | |
2467 | /* | |
2468 | * The (Re)Association Response frame from the Capability Information | |
2469 | * field (the same offset in both Association and Reassociation | |
2470 | * Response frames) to the FILS Session element (both inclusive). | |
2471 | */ | |
2472 | aad[4] = (const u8 *) &mgmt->u.assoc_resp.capab_info; | |
2473 | aad_len[4] = pos - aad[4]; | |
2474 | ||
2475 | /* The following elements will be encrypted with AES-SIV */ | |
9392859d JM |
2476 | plain = fils_prepare_plainbuf(sm, hlp); |
2477 | if (!plain) { | |
2478 | wpa_printf(MSG_DEBUG, "FILS: Plain buffer prep failed"); | |
2479 | return -1; | |
2480 | } | |
2481 | ||
2482 | if (pos + wpabuf_len(plain) + AES_BLOCK_SIZE > end) { | |
2483 | wpa_printf(MSG_DEBUG, | |
2484 | "FILS: Not enough room for FILS elements"); | |
2485 | wpabuf_free(plain); | |
2486 | return -1; | |
2487 | } | |
2488 | ||
2489 | wpa_hexdump_buf_key(MSG_DEBUG, "FILS: Association Response plaintext", | |
2490 | plain); | |
2491 | ||
2492 | if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len, | |
2493 | wpabuf_head(plain), wpabuf_len(plain), | |
2494 | 5, aad, aad_len, pos) < 0) { | |
2495 | wpabuf_free(plain); | |
2496 | return -1; | |
2497 | } | |
2498 | ||
2499 | wpa_hexdump(MSG_DEBUG, | |
2500 | "FILS: Encrypted Association Response elements", | |
2501 | pos, AES_BLOCK_SIZE + wpabuf_len(plain)); | |
2502 | current_len += wpabuf_len(plain) + AES_BLOCK_SIZE; | |
2503 | wpabuf_free(plain); | |
2504 | ||
2505 | sm->fils_completed = 1; | |
2506 | ||
2507 | return current_len; | |
2508 | } | |
2509 | ||
2510 | ||
2511 | static struct wpabuf * fils_prepare_plainbuf(struct wpa_state_machine *sm, | |
2512 | const struct wpabuf *hlp) | |
2513 | { | |
2514 | struct wpabuf *plain; | |
2515 | u8 *len, *tmp, *tmp2; | |
2516 | u8 hdr[2]; | |
2517 | u8 *gtk, dummy_gtk[32]; | |
2518 | size_t gtk_len; | |
2519 | struct wpa_group *gsm; | |
e73ffa09 JM |
2520 | |
2521 | plain = wpabuf_alloc(1000); | |
2522 | if (!plain) | |
9392859d | 2523 | return NULL; |
e73ffa09 JM |
2524 | |
2525 | /* TODO: FILS Public Key */ | |
2526 | ||
2527 | /* FILS Key Confirmation */ | |
2528 | wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */ | |
2529 | wpabuf_put_u8(plain, 1 + sm->fils_key_auth_len); /* Length */ | |
2530 | /* Element ID Extension */ | |
2531 | wpabuf_put_u8(plain, WLAN_EID_EXT_FILS_KEY_CONFIRM); | |
2532 | wpabuf_put_data(plain, sm->fils_key_auth_ap, sm->fils_key_auth_len); | |
2533 | ||
91d91abf JM |
2534 | /* FILS HLP Container */ |
2535 | if (hlp) | |
2536 | wpabuf_put_buf(plain, hlp); | |
e73ffa09 JM |
2537 | |
2538 | /* TODO: FILS IP Address Assignment */ | |
2539 | ||
2540 | /* Key Delivery */ | |
2541 | gsm = sm->group; | |
2542 | wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */ | |
2543 | len = wpabuf_put(plain, 1); | |
2544 | wpabuf_put_u8(plain, WLAN_EID_EXT_KEY_DELIVERY); | |
2545 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, | |
2546 | wpabuf_put(plain, WPA_KEY_RSC_LEN)); | |
2547 | /* GTK KDE */ | |
2548 | gtk = gsm->GTK[gsm->GN - 1]; | |
2549 | gtk_len = gsm->GTK_len; | |
8d660a4b JM |
2550 | if (sm->wpa_auth->conf.disable_gtk || |
2551 | sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) { | |
e73ffa09 JM |
2552 | /* |
2553 | * Provide unique random GTK to each STA to prevent use | |
2554 | * of GTK in the BSS. | |
2555 | */ | |
2556 | if (random_get_bytes(dummy_gtk, gtk_len) < 0) { | |
2557 | wpabuf_free(plain); | |
9392859d | 2558 | return NULL; |
e73ffa09 JM |
2559 | } |
2560 | gtk = dummy_gtk; | |
2561 | } | |
2562 | hdr[0] = gsm->GN & 0x03; | |
2563 | hdr[1] = 0; | |
2564 | tmp = wpabuf_put(plain, 0); | |
2565 | tmp2 = wpa_add_kde(tmp, RSN_KEY_DATA_GROUPKEY, hdr, 2, | |
2566 | gtk, gtk_len); | |
2567 | wpabuf_put(plain, tmp2 - tmp); | |
2568 | ||
2569 | /* IGTK KDE */ | |
2570 | tmp = wpabuf_put(plain, 0); | |
2571 | tmp2 = ieee80211w_kde_add(sm, tmp); | |
2572 | wpabuf_put(plain, tmp2 - tmp); | |
2573 | ||
2574 | *len = (u8 *) wpabuf_put(plain, 0) - len - 1; | |
9392859d | 2575 | return plain; |
e73ffa09 JM |
2576 | } |
2577 | ||
da24c5aa JM |
2578 | |
2579 | int fils_set_tk(struct wpa_state_machine *sm) | |
2580 | { | |
2581 | enum wpa_alg alg; | |
2582 | int klen; | |
2583 | ||
2f1357fb JM |
2584 | if (!sm || !sm->PTK_valid) { |
2585 | wpa_printf(MSG_DEBUG, "FILS: No valid PTK available to set TK"); | |
2586 | return -1; | |
2587 | } | |
2588 | if (sm->tk_already_set) { | |
2589 | wpa_printf(MSG_DEBUG, "FILS: TK already set to the driver"); | |
da24c5aa | 2590 | return -1; |
2f1357fb | 2591 | } |
da24c5aa JM |
2592 | |
2593 | alg = wpa_cipher_to_alg(sm->pairwise); | |
2594 | klen = wpa_cipher_key_len(sm->pairwise); | |
2595 | ||
2596 | wpa_printf(MSG_DEBUG, "FILS: Configure TK to the driver"); | |
2597 | if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0, | |
2598 | sm->PTK.tk, klen)) { | |
2599 | wpa_printf(MSG_DEBUG, "FILS: Failed to set TK to the driver"); | |
2600 | return -1; | |
2601 | } | |
2f1357fb | 2602 | sm->tk_already_set = TRUE; |
da24c5aa JM |
2603 | |
2604 | return 0; | |
2605 | } | |
2606 | ||
fa61bff6 JM |
2607 | |
2608 | u8 * hostapd_eid_assoc_fils_session(struct wpa_state_machine *sm, u8 *buf, | |
8b5ddda5 | 2609 | const u8 *fils_session, struct wpabuf *hlp) |
fa61bff6 JM |
2610 | { |
2611 | struct wpabuf *plain; | |
2612 | u8 *pos = buf; | |
2613 | ||
2614 | /* FILS Session */ | |
2615 | *pos++ = WLAN_EID_EXTENSION; /* Element ID */ | |
2616 | *pos++ = 1 + FILS_SESSION_LEN; /* Length */ | |
2617 | *pos++ = WLAN_EID_EXT_FILS_SESSION; /* Element ID Extension */ | |
2618 | os_memcpy(pos, fils_session, FILS_SESSION_LEN); | |
2619 | pos += FILS_SESSION_LEN; | |
2620 | ||
8b5ddda5 | 2621 | plain = fils_prepare_plainbuf(sm, hlp); |
fa61bff6 JM |
2622 | if (!plain) { |
2623 | wpa_printf(MSG_DEBUG, "FILS: Plain buffer prep failed"); | |
2624 | return NULL; | |
2625 | } | |
2626 | ||
2627 | os_memcpy(pos, wpabuf_head(plain), wpabuf_len(plain)); | |
2628 | pos += wpabuf_len(plain); | |
2629 | ||
2630 | wpa_printf(MSG_DEBUG, "%s: plain buf_len: %u", __func__, | |
2631 | (unsigned int) wpabuf_len(plain)); | |
2632 | wpabuf_free(plain); | |
2633 | sm->fils_completed = 1; | |
2634 | return pos; | |
2635 | } | |
2636 | ||
3b5b7aa8 JM |
2637 | #endif /* CONFIG_FILS */ |
2638 | ||
2639 | ||
6fc6879b JM |
2640 | SM_STATE(WPA_PTK, PTKCALCNEGOTIATING) |
2641 | { | |
3b5b7aa8 | 2642 | struct wpa_authenticator *wpa_auth = sm->wpa_auth; |
6fc6879b | 2643 | struct wpa_ptk PTK; |
2c502460 | 2644 | int ok = 0, psk_found = 0; |
6fc6879b | 2645 | const u8 *pmk = NULL; |
7a12edd1 | 2646 | size_t pmk_len; |
3b5b7aa8 JM |
2647 | int ft; |
2648 | const u8 *eapol_key_ie, *key_data, *mic; | |
2649 | u16 key_data_length; | |
2650 | size_t mic_len, eapol_key_ie_len; | |
2651 | struct ieee802_1x_hdr *hdr; | |
2652 | struct wpa_eapol_key *key; | |
2653 | struct wpa_eapol_ie_parse kde; | |
6fc6879b JM |
2654 | |
2655 | SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk); | |
2656 | sm->EAPOLKeyReceived = FALSE; | |
68921e24 | 2657 | sm->update_snonce = FALSE; |
b729fd8d | 2658 | os_memset(&PTK, 0, sizeof(PTK)); |
6fc6879b | 2659 | |
567da5bb | 2660 | mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len); |
3b5b7aa8 | 2661 | |
6fc6879b JM |
2662 | /* WPA with IEEE 802.1X: use the derived PMK from EAP |
2663 | * WPA-PSK: iterate through possible PSKs and select the one matching | |
2664 | * the packet */ | |
2665 | for (;;) { | |
e61fea6b JM |
2666 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) && |
2667 | !wpa_key_mgmt_sae(sm->wpa_key_mgmt)) { | |
759fd76b | 2668 | pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, |
7a12edd1 | 2669 | sm->p2p_dev_addr, pmk, &pmk_len); |
6fc6879b JM |
2670 | if (pmk == NULL) |
2671 | break; | |
2c502460 | 2672 | psk_found = 1; |
f9854c18 MK |
2673 | #ifdef CONFIG_IEEE80211R_AP |
2674 | if (wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt)) { | |
2675 | os_memcpy(sm->xxkey, pmk, pmk_len); | |
2676 | sm->xxkey_len = pmk_len; | |
2677 | } | |
2678 | #endif /* CONFIG_IEEE80211R_AP */ | |
207976f0 | 2679 | } else { |
6fc6879b | 2680 | pmk = sm->PMK; |
207976f0 JM |
2681 | pmk_len = sm->pmk_len; |
2682 | } | |
6fc6879b | 2683 | |
364c064a JM |
2684 | if (wpa_derive_ptk(sm, sm->SNonce, pmk, pmk_len, &PTK) < 0) |
2685 | break; | |
6fc6879b | 2686 | |
3b5b7aa8 | 2687 | if (mic_len && |
567da5bb | 2688 | wpa_verify_key_mic(sm->wpa_key_mgmt, pmk_len, &PTK, |
929a2ea5 | 2689 | sm->last_rx_eapol_key, |
6fc6879b JM |
2690 | sm->last_rx_eapol_key_len) == 0) { |
2691 | ok = 1; | |
2692 | break; | |
2693 | } | |
2694 | ||
3b5b7aa8 | 2695 | #ifdef CONFIG_FILS |
75c8563e JM |
2696 | if (!mic_len && |
2697 | wpa_aead_decrypt(sm, &PTK, sm->last_rx_eapol_key, | |
2698 | sm->last_rx_eapol_key_len, NULL) == 0) { | |
3b5b7aa8 JM |
2699 | ok = 1; |
2700 | break; | |
2701 | } | |
2702 | #endif /* CONFIG_FILS */ | |
2703 | ||
f5e0a332 JM |
2704 | if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) || |
2705 | wpa_key_mgmt_sae(sm->wpa_key_mgmt)) | |
6fc6879b JM |
2706 | break; |
2707 | } | |
2708 | ||
2709 | if (!ok) { | |
2710 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
2711 | "invalid MIC in msg 2/4 of 4-Way Handshake"); | |
2c502460 JM |
2712 | if (psk_found) |
2713 | wpa_auth_psk_failure_report(sm->wpa_auth, sm->addr); | |
6fc6879b JM |
2714 | return; |
2715 | } | |
2716 | ||
3b5b7aa8 JM |
2717 | /* |
2718 | * Note: last_rx_eapol_key length fields have already been validated in | |
2719 | * wpa_receive(). | |
2720 | */ | |
2721 | hdr = (struct ieee802_1x_hdr *) sm->last_rx_eapol_key; | |
2722 | key = (struct wpa_eapol_key *) (hdr + 1); | |
2723 | mic = (u8 *) (key + 1); | |
2724 | key_data = mic + mic_len + 2; | |
2725 | key_data_length = WPA_GET_BE16(mic + mic_len); | |
2726 | if (key_data_length > sm->last_rx_eapol_key_len - sizeof(*hdr) - | |
2727 | sizeof(*key) - mic_len - 2) | |
2728 | return; | |
2729 | ||
2730 | if (wpa_parse_kde_ies(key_data, key_data_length, &kde) < 0) { | |
2731 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
2732 | "received EAPOL-Key msg 2/4 with invalid Key Data contents"); | |
2733 | return; | |
2734 | } | |
2735 | if (kde.rsn_ie) { | |
2736 | eapol_key_ie = kde.rsn_ie; | |
2737 | eapol_key_ie_len = kde.rsn_ie_len; | |
2738 | } else if (kde.osen) { | |
2739 | eapol_key_ie = kde.osen; | |
2740 | eapol_key_ie_len = kde.osen_len; | |
2741 | } else { | |
2742 | eapol_key_ie = kde.wpa_ie; | |
2743 | eapol_key_ie_len = kde.wpa_ie_len; | |
2744 | } | |
2745 | ft = sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt); | |
2746 | if (sm->wpa_ie == NULL || | |
2747 | wpa_compare_rsn_ie(ft, sm->wpa_ie, sm->wpa_ie_len, | |
2748 | eapol_key_ie, eapol_key_ie_len)) { | |
2749 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
2750 | "WPA IE from (Re)AssocReq did not match with msg 2/4"); | |
2751 | if (sm->wpa_ie) { | |
2752 | wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq", | |
2753 | sm->wpa_ie, sm->wpa_ie_len); | |
2754 | } | |
2755 | wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4", | |
2756 | eapol_key_ie, eapol_key_ie_len); | |
2757 | /* MLME-DEAUTHENTICATE.request */ | |
567da5bb JM |
2758 | wpa_sta_disconnect(wpa_auth, sm->addr, |
2759 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
3b5b7aa8 JM |
2760 | return; |
2761 | } | |
4ec1fd8e | 2762 | #ifdef CONFIG_IEEE80211R_AP |
3b5b7aa8 | 2763 | if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) { |
567da5bb JM |
2764 | wpa_sta_disconnect(wpa_auth, sm->addr, |
2765 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
3b5b7aa8 JM |
2766 | return; |
2767 | } | |
4ec1fd8e | 2768 | #endif /* CONFIG_IEEE80211R_AP */ |
3b5b7aa8 JM |
2769 | #ifdef CONFIG_P2P |
2770 | if (kde.ip_addr_req && kde.ip_addr_req[0] && | |
2771 | wpa_auth->ip_pool && WPA_GET_BE32(sm->ip_addr) == 0) { | |
2772 | int idx; | |
2773 | wpa_printf(MSG_DEBUG, | |
2774 | "P2P: IP address requested in EAPOL-Key exchange"); | |
2775 | idx = bitfield_get_first_zero(wpa_auth->ip_pool); | |
2776 | if (idx >= 0) { | |
2777 | u32 start = WPA_GET_BE32(wpa_auth->conf.ip_addr_start); | |
2778 | bitfield_set(wpa_auth->ip_pool, idx); | |
2779 | WPA_PUT_BE32(sm->ip_addr, start + idx); | |
2780 | wpa_printf(MSG_DEBUG, | |
2781 | "P2P: Assigned IP address %u.%u.%u.%u to " | |
2782 | MACSTR, sm->ip_addr[0], sm->ip_addr[1], | |
2783 | sm->ip_addr[2], sm->ip_addr[3], | |
2784 | MAC2STR(sm->addr)); | |
2785 | } | |
2786 | } | |
2787 | #endif /* CONFIG_P2P */ | |
2788 | ||
4ec1fd8e | 2789 | #ifdef CONFIG_IEEE80211R_AP |
26e23750 JM |
2790 | if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { |
2791 | /* | |
2792 | * Verify that PMKR1Name from EAPOL-Key message 2/4 matches | |
2793 | * with the value we derived. | |
2794 | */ | |
870834a1 JM |
2795 | if (os_memcmp_const(sm->sup_pmk_r1_name, sm->pmk_r1_name, |
2796 | WPA_PMK_NAME_LEN) != 0) { | |
26e23750 JM |
2797 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, |
2798 | "PMKR1Name mismatch in FT 4-way " | |
2799 | "handshake"); | |
2800 | wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from " | |
2801 | "Supplicant", | |
2802 | sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN); | |
2803 | wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name", | |
2804 | sm->pmk_r1_name, WPA_PMK_NAME_LEN); | |
2805 | return; | |
2806 | } | |
2807 | } | |
4ec1fd8e | 2808 | #endif /* CONFIG_IEEE80211R_AP */ |
26e23750 | 2809 | |
e4bf4db9 | 2810 | sm->pending_1_of_4_timeout = 0; |
6fc6879b JM |
2811 | eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm); |
2812 | ||
56586197 | 2813 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) { |
6fc6879b JM |
2814 | /* PSK may have changed from the previous choice, so update |
2815 | * state machine data based on whatever PSK was selected here. | |
2816 | */ | |
2817 | os_memcpy(sm->PMK, pmk, PMK_LEN); | |
207976f0 | 2818 | sm->pmk_len = PMK_LEN; |
6fc6879b JM |
2819 | } |
2820 | ||
2821 | sm->MICVerified = TRUE; | |
2822 | ||
2823 | os_memcpy(&sm->PTK, &PTK, sizeof(PTK)); | |
2824 | sm->PTK_valid = TRUE; | |
2825 | } | |
2826 | ||
2827 | ||
2828 | SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2) | |
2829 | { | |
2830 | SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk); | |
2831 | sm->TimeoutCtr = 0; | |
2832 | } | |
2833 | ||
2834 | ||
2835 | #ifdef CONFIG_IEEE80211W | |
2836 | ||
2837 | static int ieee80211w_kde_len(struct wpa_state_machine *sm) | |
2838 | { | |
2839 | if (sm->mgmt_frame_prot) { | |
8dd9f9cd JM |
2840 | size_t len; |
2841 | len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher); | |
2842 | return 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN + len; | |
6fc6879b JM |
2843 | } |
2844 | ||
2845 | return 0; | |
2846 | } | |
2847 | ||
2848 | ||
2849 | static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos) | |
2850 | { | |
2851 | struct wpa_igtk_kde igtk; | |
2852 | struct wpa_group *gsm = sm->group; | |
03610ad2 | 2853 | u8 rsc[WPA_KEY_RSC_LEN]; |
8dd9f9cd | 2854 | size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher); |
6fc6879b JM |
2855 | |
2856 | if (!sm->mgmt_frame_prot) | |
2857 | return pos; | |
2858 | ||
2859 | igtk.keyid[0] = gsm->GN_igtk; | |
2860 | igtk.keyid[1] = 0; | |
7b1080da | 2861 | if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE || |
03610ad2 | 2862 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, rsc) < 0) |
6fc6879b | 2863 | os_memset(igtk.pn, 0, sizeof(igtk.pn)); |
03610ad2 JM |
2864 | else |
2865 | os_memcpy(igtk.pn, rsc, sizeof(igtk.pn)); | |
8dd9f9cd | 2866 | os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], len); |
8d660a4b JM |
2867 | if (sm->wpa_auth->conf.disable_gtk || |
2868 | sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) { | |
83421850 JM |
2869 | /* |
2870 | * Provide unique random IGTK to each STA to prevent use of | |
2871 | * IGTK in the BSS. | |
2872 | */ | |
8dd9f9cd | 2873 | if (random_get_bytes(igtk.igtk, len) < 0) |
83421850 JM |
2874 | return pos; |
2875 | } | |
6fc6879b | 2876 | pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK, |
8dd9f9cd JM |
2877 | (const u8 *) &igtk, WPA_IGTK_KDE_PREFIX_LEN + len, |
2878 | NULL, 0); | |
6fc6879b JM |
2879 | |
2880 | return pos; | |
2881 | } | |
2882 | ||
2883 | #else /* CONFIG_IEEE80211W */ | |
2884 | ||
2885 | static int ieee80211w_kde_len(struct wpa_state_machine *sm) | |
2886 | { | |
2887 | return 0; | |
2888 | } | |
2889 | ||
2890 | ||
2891 | static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos) | |
2892 | { | |
2893 | return pos; | |
2894 | } | |
2895 | ||
2896 | #endif /* CONFIG_IEEE80211W */ | |
2897 | ||
2898 | ||
17c2559c MV |
2899 | static int ocv_oci_len(struct wpa_state_machine *sm) |
2900 | { | |
2901 | #ifdef CONFIG_OCV | |
2902 | if (wpa_auth_uses_ocv(sm)) | |
2903 | return OCV_OCI_KDE_LEN; | |
2904 | #endif /* CONFIG_OCV */ | |
2905 | return 0; | |
2906 | } | |
2907 | ||
2908 | static int ocv_oci_add(struct wpa_state_machine *sm, u8 **argpos) | |
2909 | { | |
2910 | #ifdef CONFIG_OCV | |
2911 | struct wpa_channel_info ci; | |
2912 | ||
2913 | if (!wpa_auth_uses_ocv(sm)) | |
2914 | return 0; | |
2915 | ||
2916 | if (wpa_channel_info(sm->wpa_auth, &ci) != 0) { | |
2917 | wpa_printf(MSG_WARNING, | |
2918 | "Failed to get channel info for OCI element"); | |
2919 | return -1; | |
2920 | } | |
2921 | ||
2922 | return ocv_insert_oci_kde(&ci, argpos); | |
2923 | #else /* CONFIG_OCV */ | |
2924 | return 0; | |
2925 | #endif /* CONFIG_OCV */ | |
2926 | } | |
2927 | ||
2928 | ||
6fc6879b JM |
2929 | SM_STATE(WPA_PTK, PTKINITNEGOTIATING) |
2930 | { | |
83421850 | 2931 | u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos, dummy_gtk[32]; |
6fc6879b JM |
2932 | size_t gtk_len, kde_len; |
2933 | struct wpa_group *gsm = sm->group; | |
2934 | u8 *wpa_ie; | |
2935 | int wpa_ie_len, secure, keyidx, encr = 0; | |
2936 | ||
2937 | SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk); | |
2938 | sm->TimeoutEvt = FALSE; | |
bae61562 JM |
2939 | |
2940 | sm->TimeoutCtr++; | |
6f234c1e JM |
2941 | if (sm->wpa_auth->conf.wpa_disable_eapol_key_retries && |
2942 | sm->TimeoutCtr > 1) { | |
2943 | /* Do not allow retransmission of EAPOL-Key msg 3/4 */ | |
2944 | return; | |
2945 | } | |
41f140d3 | 2946 | if (sm->TimeoutCtr > sm->wpa_auth->conf.wpa_pairwise_update_count) { |
bae61562 JM |
2947 | /* No point in sending the EAPOL-Key - we will disconnect |
2948 | * immediately following this. */ | |
2949 | return; | |
2950 | } | |
2951 | ||
86dfabb8 JM |
2952 | /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE], |
2953 | GTK[GN], IGTK, [FTIE], [TIE * 2]) | |
6fc6879b JM |
2954 | */ |
2955 | os_memset(rsc, 0, WPA_KEY_RSC_LEN); | |
2956 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc); | |
86dfabb8 | 2957 | /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */ |
6fc6879b JM |
2958 | wpa_ie = sm->wpa_auth->wpa_ie; |
2959 | wpa_ie_len = sm->wpa_auth->wpa_ie_len; | |
2960 | if (sm->wpa == WPA_VERSION_WPA && | |
2961 | (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) && | |
2962 | wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) { | |
774d4145 | 2963 | /* WPA-only STA, remove RSN IE and possible MDIE */ |
6fc6879b | 2964 | wpa_ie = wpa_ie + wpa_ie[1] + 2; |
774d4145 JM |
2965 | if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN) |
2966 | wpa_ie = wpa_ie + wpa_ie[1] + 2; | |
6fc6879b JM |
2967 | wpa_ie_len = wpa_ie[1] + 2; |
2968 | } | |
2969 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
2970 | "sending 3/4 msg of 4-Way Handshake"); | |
2971 | if (sm->wpa == WPA_VERSION_WPA2) { | |
2972 | /* WPA2 send GTK in the 4-way handshake */ | |
2973 | secure = 1; | |
2974 | gtk = gsm->GTK[gsm->GN - 1]; | |
2975 | gtk_len = gsm->GTK_len; | |
8d660a4b JM |
2976 | if (sm->wpa_auth->conf.disable_gtk || |
2977 | sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) { | |
83421850 JM |
2978 | /* |
2979 | * Provide unique random GTK to each STA to prevent use | |
2980 | * of GTK in the BSS. | |
2981 | */ | |
2982 | if (random_get_bytes(dummy_gtk, gtk_len) < 0) | |
2983 | return; | |
2984 | gtk = dummy_gtk; | |
2985 | } | |
6fc6879b JM |
2986 | keyidx = gsm->GN; |
2987 | _rsc = rsc; | |
2988 | encr = 1; | |
2989 | } else { | |
2990 | /* WPA does not include GTK in msg 3/4 */ | |
2991 | secure = 0; | |
2992 | gtk = NULL; | |
2993 | gtk_len = 0; | |
2994 | keyidx = 0; | |
2995 | _rsc = NULL; | |
0d442aff JM |
2996 | if (sm->rx_eapol_key_secure) { |
2997 | /* | |
2998 | * It looks like Windows 7 supplicant tries to use | |
2999 | * Secure bit in msg 2/4 after having reported Michael | |
3000 | * MIC failure and it then rejects the 4-way handshake | |
3001 | * if msg 3/4 does not set Secure bit. Work around this | |
3002 | * by setting the Secure bit here even in the case of | |
3003 | * WPA if the supplicant used it first. | |
3004 | */ | |
3005 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
4740d5b9 JM |
3006 | "STA used Secure bit in WPA msg 2/4 - " |
3007 | "set Secure for 3/4 as workaround"); | |
0d442aff JM |
3008 | secure = 1; |
3009 | } | |
6fc6879b JM |
3010 | } |
3011 | ||
17c2559c | 3012 | kde_len = wpa_ie_len + ieee80211w_kde_len(sm) + ocv_oci_len(sm); |
6fc6879b JM |
3013 | if (gtk) |
3014 | kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len; | |
4ec1fd8e | 3015 | #ifdef CONFIG_IEEE80211R_AP |
86dfabb8 JM |
3016 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { |
3017 | kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */ | |
3018 | kde_len += 300; /* FTIE + 2 * TIE */ | |
3019 | } | |
4ec1fd8e | 3020 | #endif /* CONFIG_IEEE80211R_AP */ |
25ef8529 JM |
3021 | #ifdef CONFIG_P2P |
3022 | if (WPA_GET_BE32(sm->ip_addr) > 0) | |
3023 | kde_len += 2 + RSN_SELECTOR_LEN + 3 * 4; | |
3024 | #endif /* CONFIG_P2P */ | |
6fc6879b JM |
3025 | kde = os_malloc(kde_len); |
3026 | if (kde == NULL) | |
3027 | return; | |
3028 | ||
3029 | pos = kde; | |
3030 | os_memcpy(pos, wpa_ie, wpa_ie_len); | |
3031 | pos += wpa_ie_len; | |
4ec1fd8e | 3032 | #ifdef CONFIG_IEEE80211R_AP |
26e23750 | 3033 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { |
59e78c24 JM |
3034 | int res; |
3035 | size_t elen; | |
3036 | ||
3037 | elen = pos - kde; | |
3038 | res = wpa_insert_pmkid(kde, &elen, sm->pmk_r1_name); | |
26e23750 JM |
3039 | if (res < 0) { |
3040 | wpa_printf(MSG_ERROR, "FT: Failed to insert " | |
3041 | "PMKR1Name into RSN IE in EAPOL-Key data"); | |
3042 | os_free(kde); | |
3043 | return; | |
3044 | } | |
59e78c24 JM |
3045 | pos -= wpa_ie_len; |
3046 | pos += elen; | |
26e23750 | 3047 | } |
4ec1fd8e | 3048 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b JM |
3049 | if (gtk) { |
3050 | u8 hdr[2]; | |
3051 | hdr[0] = keyidx & 0x03; | |
3052 | hdr[1] = 0; | |
3053 | pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2, | |
3054 | gtk, gtk_len); | |
3055 | } | |
3056 | pos = ieee80211w_kde_add(sm, pos); | |
17c2559c MV |
3057 | if (ocv_oci_add(sm, &pos) < 0) { |
3058 | os_free(kde); | |
3059 | return; | |
3060 | } | |
6fc6879b | 3061 | |
4ec1fd8e | 3062 | #ifdef CONFIG_IEEE80211R_AP |
86dfabb8 JM |
3063 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { |
3064 | int res; | |
3065 | struct wpa_auth_config *conf; | |
3066 | ||
3067 | conf = &sm->wpa_auth->conf; | |
9257610a JM |
3068 | if (sm->assoc_resp_ftie && |
3069 | kde + kde_len - pos >= 2 + sm->assoc_resp_ftie[1]) { | |
3070 | os_memcpy(pos, sm->assoc_resp_ftie, | |
3071 | 2 + sm->assoc_resp_ftie[1]); | |
3072 | res = 2 + sm->assoc_resp_ftie[1]; | |
3073 | } else { | |
a7968ea5 JM |
3074 | int use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt); |
3075 | ||
3076 | res = wpa_write_ftie(conf, use_sha384, | |
3077 | conf->r0_key_holder, | |
9257610a JM |
3078 | conf->r0_key_holder_len, |
3079 | NULL, NULL, pos, | |
3080 | kde + kde_len - pos, | |
3081 | NULL, 0); | |
3082 | } | |
86dfabb8 JM |
3083 | if (res < 0) { |
3084 | wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE " | |
3085 | "into EAPOL-Key Key Data"); | |
3086 | os_free(kde); | |
3087 | return; | |
3088 | } | |
3089 | pos += res; | |
3090 | ||
3091 | /* TIE[ReassociationDeadline] (TU) */ | |
3092 | *pos++ = WLAN_EID_TIMEOUT_INTERVAL; | |
3093 | *pos++ = 5; | |
3094 | *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE; | |
3095 | WPA_PUT_LE32(pos, conf->reassociation_deadline); | |
3096 | pos += 4; | |
3097 | ||
3098 | /* TIE[KeyLifetime] (seconds) */ | |
3099 | *pos++ = WLAN_EID_TIMEOUT_INTERVAL; | |
3100 | *pos++ = 5; | |
3101 | *pos++ = WLAN_TIMEOUT_KEY_LIFETIME; | |
83fe4bd3 | 3102 | WPA_PUT_LE32(pos, conf->r0_key_lifetime); |
86dfabb8 JM |
3103 | pos += 4; |
3104 | } | |
4ec1fd8e | 3105 | #endif /* CONFIG_IEEE80211R_AP */ |
25ef8529 JM |
3106 | #ifdef CONFIG_P2P |
3107 | if (WPA_GET_BE32(sm->ip_addr) > 0) { | |
3108 | u8 addr[3 * 4]; | |
3109 | os_memcpy(addr, sm->ip_addr, 4); | |
3110 | os_memcpy(addr + 4, sm->wpa_auth->conf.ip_addr_mask, 4); | |
3111 | os_memcpy(addr + 8, sm->wpa_auth->conf.ip_addr_go, 4); | |
3112 | pos = wpa_add_kde(pos, WFA_KEY_DATA_IP_ADDR_ALLOC, | |
3113 | addr, sizeof(addr), NULL, 0); | |
3114 | } | |
3115 | #endif /* CONFIG_P2P */ | |
86dfabb8 | 3116 | |
6fc6879b | 3117 | wpa_send_eapol(sm->wpa_auth, sm, |
b729fd8d | 3118 | (secure ? WPA_KEY_INFO_SECURE : 0) | |
567da5bb JM |
3119 | (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ? |
3120 | WPA_KEY_INFO_MIC : 0) | | |
6fc6879b JM |
3121 | WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL | |
3122 | WPA_KEY_INFO_KEY_TYPE, | |
3123 | _rsc, sm->ANonce, kde, pos - kde, keyidx, encr); | |
3124 | os_free(kde); | |
6fc6879b JM |
3125 | } |
3126 | ||
3127 | ||
3128 | SM_STATE(WPA_PTK, PTKINITDONE) | |
3129 | { | |
3130 | SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk); | |
3131 | sm->EAPOLKeyReceived = FALSE; | |
3132 | if (sm->Pair) { | |
c3550295 JM |
3133 | enum wpa_alg alg = wpa_cipher_to_alg(sm->pairwise); |
3134 | int klen = wpa_cipher_key_len(sm->pairwise); | |
6fc6879b | 3135 | if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0, |
98cd3d1c | 3136 | sm->PTK.tk, klen)) { |
567da5bb JM |
3137 | wpa_sta_disconnect(sm->wpa_auth, sm->addr, |
3138 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
6fc6879b JM |
3139 | return; |
3140 | } | |
3141 | /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */ | |
3142 | sm->pairwise_set = TRUE; | |
3143 | ||
581a8cde JM |
3144 | if (sm->wpa_auth->conf.wpa_ptk_rekey) { |
3145 | eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm); | |
3146 | eloop_register_timeout(sm->wpa_auth->conf. | |
3147 | wpa_ptk_rekey, 0, wpa_rekey_ptk, | |
3148 | sm->wpa_auth, sm); | |
3149 | } | |
3150 | ||
a1ea1b45 | 3151 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) || |
567da5bb | 3152 | sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP || |
a1ea1b45 | 3153 | sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) { |
6fc6879b JM |
3154 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, |
3155 | WPA_EAPOL_authorized, 1); | |
3156 | } | |
3157 | } | |
3158 | ||
3159 | if (0 /* IBSS == TRUE */) { | |
3160 | sm->keycount++; | |
3161 | if (sm->keycount == 2) { | |
3162 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, | |
3163 | WPA_EAPOL_portValid, 1); | |
3164 | } | |
3165 | } else { | |
3166 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, | |
3167 | 1); | |
3168 | } | |
3169 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0); | |
3170 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1); | |
3171 | if (sm->wpa == WPA_VERSION_WPA) | |
3172 | sm->PInitAKeys = TRUE; | |
3173 | else | |
3174 | sm->has_GTK = TRUE; | |
3175 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO, | |
3176 | "pairwise key handshake completed (%s)", | |
3177 | sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN"); | |
3178 | ||
4ec1fd8e | 3179 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b | 3180 | wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr); |
4ec1fd8e | 3181 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b JM |
3182 | } |
3183 | ||
3184 | ||
3185 | SM_STEP(WPA_PTK) | |
3186 | { | |
3187 | struct wpa_authenticator *wpa_auth = sm->wpa_auth; | |
3188 | ||
3189 | if (sm->Init) | |
3190 | SM_ENTER(WPA_PTK, INITIALIZE); | |
3191 | else if (sm->Disconnect | |
1aae01fc BG |
3192 | /* || FIX: dot11RSNAConfigSALifetime timeout */) { |
3193 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
3194 | "WPA_PTK: sm->Disconnect"); | |
6fc6879b | 3195 | SM_ENTER(WPA_PTK, DISCONNECT); |
1aae01fc | 3196 | } |
6fc6879b JM |
3197 | else if (sm->DeauthenticationRequest) |
3198 | SM_ENTER(WPA_PTK, DISCONNECTED); | |
3199 | else if (sm->AuthenticationRequest) | |
3200 | SM_ENTER(WPA_PTK, AUTHENTICATION); | |
3201 | else if (sm->ReAuthenticationRequest) | |
3202 | SM_ENTER(WPA_PTK, AUTHENTICATION2); | |
0adc9b28 JM |
3203 | else if (sm->PTKRequest) { |
3204 | if (wpa_auth_sm_ptk_update(sm) < 0) | |
3205 | SM_ENTER(WPA_PTK, DISCONNECTED); | |
3206 | else | |
3207 | SM_ENTER(WPA_PTK, PTKSTART); | |
3208 | } else switch (sm->wpa_ptk_state) { | |
6fc6879b JM |
3209 | case WPA_PTK_INITIALIZE: |
3210 | break; | |
3211 | case WPA_PTK_DISCONNECT: | |
3212 | SM_ENTER(WPA_PTK, DISCONNECTED); | |
3213 | break; | |
3214 | case WPA_PTK_DISCONNECTED: | |
3215 | SM_ENTER(WPA_PTK, INITIALIZE); | |
3216 | break; | |
3217 | case WPA_PTK_AUTHENTICATION: | |
3218 | SM_ENTER(WPA_PTK, AUTHENTICATION2); | |
3219 | break; | |
3220 | case WPA_PTK_AUTHENTICATION2: | |
56586197 | 3221 | if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) && |
6fc6879b JM |
3222 | wpa_auth_get_eapol(sm->wpa_auth, sm->addr, |
3223 | WPA_EAPOL_keyRun) > 0) | |
3224 | SM_ENTER(WPA_PTK, INITPMK); | |
a1ea1b45 JM |
3225 | else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) || |
3226 | sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE | |
6fc6879b JM |
3227 | /* FIX: && 802.1X::keyRun */) |
3228 | SM_ENTER(WPA_PTK, INITPSK); | |
567da5bb JM |
3229 | else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP) |
3230 | SM_ENTER(WPA_PTK, INITPMK); | |
6fc6879b JM |
3231 | break; |
3232 | case WPA_PTK_INITPMK: | |
3233 | if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr, | |
567da5bb | 3234 | WPA_EAPOL_keyAvailable) > 0) { |
6fc6879b | 3235 | SM_ENTER(WPA_PTK, PTKSTART); |
567da5bb JM |
3236 | #ifdef CONFIG_DPP |
3237 | } else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP && sm->pmksa) { | |
3238 | SM_ENTER(WPA_PTK, PTKSTART); | |
3239 | #endif /* CONFIG_DPP */ | |
3240 | } else { | |
6fc6879b | 3241 | wpa_auth->dot11RSNA4WayHandshakeFailures++; |
1aae01fc BG |
3242 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO, |
3243 | "INITPMK - keyAvailable = false"); | |
6fc6879b JM |
3244 | SM_ENTER(WPA_PTK, DISCONNECT); |
3245 | } | |
3246 | break; | |
3247 | case WPA_PTK_INITPSK: | |
759fd76b | 3248 | if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr, |
7a12edd1 | 3249 | NULL, NULL)) { |
6fc6879b | 3250 | SM_ENTER(WPA_PTK, PTKSTART); |
e61fea6b JM |
3251 | #ifdef CONFIG_SAE |
3252 | } else if (wpa_auth_uses_sae(sm) && sm->pmksa) { | |
3253 | SM_ENTER(WPA_PTK, PTKSTART); | |
3254 | #endif /* CONFIG_SAE */ | |
3255 | } else { | |
6fc6879b JM |
3256 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO, |
3257 | "no PSK configured for the STA"); | |
3258 | wpa_auth->dot11RSNA4WayHandshakeFailures++; | |
3259 | SM_ENTER(WPA_PTK, DISCONNECT); | |
3260 | } | |
3261 | break; | |
3262 | case WPA_PTK_PTKSTART: | |
3263 | if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest && | |
3264 | sm->EAPOLKeyPairwise) | |
3265 | SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING); | |
3266 | else if (sm->TimeoutCtr > | |
41f140d3 | 3267 | sm->wpa_auth->conf.wpa_pairwise_update_count) { |
6fc6879b | 3268 | wpa_auth->dot11RSNA4WayHandshakeFailures++; |
41f140d3 GK |
3269 | wpa_auth_vlogger( |
3270 | sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
3271 | "PTKSTART: Retry limit %u reached", | |
3272 | sm->wpa_auth->conf.wpa_pairwise_update_count); | |
6fc6879b JM |
3273 | SM_ENTER(WPA_PTK, DISCONNECT); |
3274 | } else if (sm->TimeoutEvt) | |
3275 | SM_ENTER(WPA_PTK, PTKSTART); | |
3276 | break; | |
3277 | case WPA_PTK_PTKCALCNEGOTIATING: | |
3278 | if (sm->MICVerified) | |
3279 | SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2); | |
3280 | else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest && | |
3281 | sm->EAPOLKeyPairwise) | |
3282 | SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING); | |
3283 | else if (sm->TimeoutEvt) | |
3284 | SM_ENTER(WPA_PTK, PTKSTART); | |
3285 | break; | |
3286 | case WPA_PTK_PTKCALCNEGOTIATING2: | |
3287 | SM_ENTER(WPA_PTK, PTKINITNEGOTIATING); | |
3288 | break; | |
3289 | case WPA_PTK_PTKINITNEGOTIATING: | |
68921e24 JM |
3290 | if (sm->update_snonce) |
3291 | SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING); | |
3292 | else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest && | |
3293 | sm->EAPOLKeyPairwise && sm->MICVerified) | |
6fc6879b JM |
3294 | SM_ENTER(WPA_PTK, PTKINITDONE); |
3295 | else if (sm->TimeoutCtr > | |
6f234c1e JM |
3296 | sm->wpa_auth->conf.wpa_pairwise_update_count || |
3297 | (sm->wpa_auth->conf.wpa_disable_eapol_key_retries && | |
3298 | sm->TimeoutCtr > 1)) { | |
6fc6879b | 3299 | wpa_auth->dot11RSNA4WayHandshakeFailures++; |
41f140d3 GK |
3300 | wpa_auth_vlogger( |
3301 | sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
3302 | "PTKINITNEGOTIATING: Retry limit %u reached", | |
3303 | sm->wpa_auth->conf.wpa_pairwise_update_count); | |
6fc6879b JM |
3304 | SM_ENTER(WPA_PTK, DISCONNECT); |
3305 | } else if (sm->TimeoutEvt) | |
3306 | SM_ENTER(WPA_PTK, PTKINITNEGOTIATING); | |
3307 | break; | |
3308 | case WPA_PTK_PTKINITDONE: | |
3309 | break; | |
3310 | } | |
3311 | } | |
3312 | ||
3313 | ||
3314 | SM_STATE(WPA_PTK_GROUP, IDLE) | |
3315 | { | |
3316 | SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group); | |
3317 | if (sm->Init) { | |
3318 | /* Init flag is not cleared here, so avoid busy | |
3319 | * loop by claiming nothing changed. */ | |
3320 | sm->changed = FALSE; | |
3321 | } | |
3322 | sm->GTimeoutCtr = 0; | |
3323 | } | |
3324 | ||
3325 | ||
3326 | SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING) | |
3327 | { | |
3328 | u8 rsc[WPA_KEY_RSC_LEN]; | |
3329 | struct wpa_group *gsm = sm->group; | |
e41e4f9e JM |
3330 | const u8 *kde; |
3331 | u8 *kde_buf = NULL, *pos, hdr[2]; | |
6fc6879b | 3332 | size_t kde_len; |
83421850 | 3333 | u8 *gtk, dummy_gtk[32]; |
6fc6879b JM |
3334 | |
3335 | SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group); | |
bae61562 JM |
3336 | |
3337 | sm->GTimeoutCtr++; | |
6f234c1e JM |
3338 | if (sm->wpa_auth->conf.wpa_disable_eapol_key_retries && |
3339 | sm->GTimeoutCtr > 1) { | |
3340 | /* Do not allow retransmission of EAPOL-Key group msg 1/2 */ | |
3341 | return; | |
3342 | } | |
41f140d3 | 3343 | if (sm->GTimeoutCtr > sm->wpa_auth->conf.wpa_group_update_count) { |
bae61562 JM |
3344 | /* No point in sending the EAPOL-Key - we will disconnect |
3345 | * immediately following this. */ | |
3346 | return; | |
3347 | } | |
3348 | ||
6fc6879b JM |
3349 | if (sm->wpa == WPA_VERSION_WPA) |
3350 | sm->PInitAKeys = FALSE; | |
3351 | sm->TimeoutEvt = FALSE; | |
3352 | /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */ | |
3353 | os_memset(rsc, 0, WPA_KEY_RSC_LEN); | |
3354 | if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE) | |
3355 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc); | |
3356 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
3357 | "sending 1/2 msg of Group Key Handshake"); | |
3358 | ||
83421850 | 3359 | gtk = gsm->GTK[gsm->GN - 1]; |
8d660a4b JM |
3360 | if (sm->wpa_auth->conf.disable_gtk || |
3361 | sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) { | |
83421850 JM |
3362 | /* |
3363 | * Provide unique random GTK to each STA to prevent use | |
3364 | * of GTK in the BSS. | |
3365 | */ | |
3366 | if (random_get_bytes(dummy_gtk, gsm->GTK_len) < 0) | |
3367 | return; | |
3368 | gtk = dummy_gtk; | |
3369 | } | |
6fc6879b JM |
3370 | if (sm->wpa == WPA_VERSION_WPA2) { |
3371 | kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len + | |
17c2559c | 3372 | ieee80211w_kde_len(sm) + ocv_oci_len(sm); |
e41e4f9e JM |
3373 | kde_buf = os_malloc(kde_len); |
3374 | if (kde_buf == NULL) | |
6fc6879b JM |
3375 | return; |
3376 | ||
e41e4f9e | 3377 | kde = pos = kde_buf; |
6fc6879b JM |
3378 | hdr[0] = gsm->GN & 0x03; |
3379 | hdr[1] = 0; | |
3380 | pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2, | |
83421850 | 3381 | gtk, gsm->GTK_len); |
6fc6879b | 3382 | pos = ieee80211w_kde_add(sm, pos); |
17c2559c MV |
3383 | if (ocv_oci_add(sm, &pos) < 0) { |
3384 | os_free(kde_buf); | |
3385 | return; | |
3386 | } | |
e41e4f9e | 3387 | kde_len = pos - kde; |
6fc6879b | 3388 | } else { |
83421850 | 3389 | kde = gtk; |
e41e4f9e | 3390 | kde_len = gsm->GTK_len; |
6fc6879b JM |
3391 | } |
3392 | ||
3393 | wpa_send_eapol(sm->wpa_auth, sm, | |
b729fd8d | 3394 | WPA_KEY_INFO_SECURE | |
567da5bb JM |
3395 | (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ? |
3396 | WPA_KEY_INFO_MIC : 0) | | |
6fc6879b JM |
3397 | WPA_KEY_INFO_ACK | |
3398 | (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0), | |
b0fb2be7 | 3399 | rsc, NULL, kde, kde_len, gsm->GN, 1); |
e41e4f9e JM |
3400 | |
3401 | os_free(kde_buf); | |
6fc6879b JM |
3402 | } |
3403 | ||
3404 | ||
3405 | SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED) | |
3406 | { | |
3407 | SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group); | |
3408 | sm->EAPOLKeyReceived = FALSE; | |
3409 | if (sm->GUpdateStationKeys) | |
3410 | sm->group->GKeyDoneStations--; | |
3411 | sm->GUpdateStationKeys = FALSE; | |
3412 | sm->GTimeoutCtr = 0; | |
3413 | /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */ | |
3414 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO, | |
3415 | "group key handshake completed (%s)", | |
3416 | sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN"); | |
3417 | sm->has_GTK = TRUE; | |
3418 | } | |
3419 | ||
3420 | ||
3421 | SM_STATE(WPA_PTK_GROUP, KEYERROR) | |
3422 | { | |
3423 | SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group); | |
3424 | if (sm->GUpdateStationKeys) | |
3425 | sm->group->GKeyDoneStations--; | |
3426 | sm->GUpdateStationKeys = FALSE; | |
3427 | sm->Disconnect = TRUE; | |
4bb9b674 GK |
3428 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO, |
3429 | "group key handshake failed (%s) after %u tries", | |
3430 | sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN", | |
3431 | sm->wpa_auth->conf.wpa_group_update_count); | |
6fc6879b JM |
3432 | } |
3433 | ||
3434 | ||
3435 | SM_STEP(WPA_PTK_GROUP) | |
3436 | { | |
9663596f | 3437 | if (sm->Init || sm->PtkGroupInit) { |
6fc6879b | 3438 | SM_ENTER(WPA_PTK_GROUP, IDLE); |
9663596f JM |
3439 | sm->PtkGroupInit = FALSE; |
3440 | } else switch (sm->wpa_ptk_group_state) { | |
6fc6879b JM |
3441 | case WPA_PTK_GROUP_IDLE: |
3442 | if (sm->GUpdateStationKeys || | |
3443 | (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys)) | |
3444 | SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING); | |
3445 | break; | |
3446 | case WPA_PTK_GROUP_REKEYNEGOTIATING: | |
3447 | if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest && | |
3448 | !sm->EAPOLKeyPairwise && sm->MICVerified) | |
3449 | SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED); | |
3450 | else if (sm->GTimeoutCtr > | |
6f234c1e JM |
3451 | sm->wpa_auth->conf.wpa_group_update_count || |
3452 | (sm->wpa_auth->conf.wpa_disable_eapol_key_retries && | |
3453 | sm->GTimeoutCtr > 1)) | |
6fc6879b JM |
3454 | SM_ENTER(WPA_PTK_GROUP, KEYERROR); |
3455 | else if (sm->TimeoutEvt) | |
3456 | SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING); | |
3457 | break; | |
3458 | case WPA_PTK_GROUP_KEYERROR: | |
3459 | SM_ENTER(WPA_PTK_GROUP, IDLE); | |
3460 | break; | |
3461 | case WPA_PTK_GROUP_REKEYESTABLISHED: | |
3462 | SM_ENTER(WPA_PTK_GROUP, IDLE); | |
3463 | break; | |
3464 | } | |
3465 | } | |
3466 | ||
3467 | ||
3468 | static int wpa_gtk_update(struct wpa_authenticator *wpa_auth, | |
3469 | struct wpa_group *group) | |
3470 | { | |
3471 | int ret = 0; | |
3472 | ||
6fc6879b JM |
3473 | os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN); |
3474 | inc_byte_array(group->Counter, WPA_NONCE_LEN); | |
3c7302c2 JM |
3475 | if (wpa_gmk_to_gtk(group->GMK, "Group key expansion", |
3476 | wpa_auth->addr, group->GNonce, | |
3477 | group->GTK[group->GN - 1], group->GTK_len) < 0) | |
3478 | ret = -1; | |
5cb9d5c3 JM |
3479 | wpa_hexdump_key(MSG_DEBUG, "GTK", |
3480 | group->GTK[group->GN - 1], group->GTK_len); | |
6fc6879b JM |
3481 | |
3482 | #ifdef CONFIG_IEEE80211W | |
70f8cc8e | 3483 | if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) { |
8dd9f9cd JM |
3484 | size_t len; |
3485 | len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher); | |
5cb9d5c3 JM |
3486 | os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN); |
3487 | inc_byte_array(group->Counter, WPA_NONCE_LEN); | |
3c7302c2 JM |
3488 | if (wpa_gmk_to_gtk(group->GMK, "IGTK key expansion", |
3489 | wpa_auth->addr, group->GNonce, | |
8dd9f9cd | 3490 | group->IGTK[group->GN_igtk - 4], len) < 0) |
3c7302c2 | 3491 | ret = -1; |
6fc6879b | 3492 | wpa_hexdump_key(MSG_DEBUG, "IGTK", |
8dd9f9cd | 3493 | group->IGTK[group->GN_igtk - 4], len); |
6fc6879b JM |
3494 | } |
3495 | #endif /* CONFIG_IEEE80211W */ | |
3496 | ||
3497 | return ret; | |
3498 | } | |
3499 | ||
3500 | ||
3501 | static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth, | |
3502 | struct wpa_group *group) | |
3503 | { | |
3504 | wpa_printf(MSG_DEBUG, "WPA: group state machine entering state " | |
3505 | "GTK_INIT (VLAN-ID %d)", group->vlan_id); | |
3506 | group->changed = FALSE; /* GInit is not cleared here; avoid loop */ | |
3507 | group->wpa_group_state = WPA_GROUP_GTK_INIT; | |
3508 | ||
3509 | /* GTK[0..N] = 0 */ | |
3510 | os_memset(group->GTK, 0, sizeof(group->GTK)); | |
3511 | group->GN = 1; | |
3512 | group->GM = 2; | |
3513 | #ifdef CONFIG_IEEE80211W | |
3514 | group->GN_igtk = 4; | |
3515 | group->GM_igtk = 5; | |
3516 | #endif /* CONFIG_IEEE80211W */ | |
3517 | /* GTK[GN] = CalcGTK() */ | |
3518 | wpa_gtk_update(wpa_auth, group); | |
3519 | } | |
3520 | ||
3521 | ||
3522 | static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx) | |
3523 | { | |
473b6f22 MB |
3524 | if (ctx != NULL && ctx != sm->group) |
3525 | return 0; | |
3526 | ||
6fc6879b JM |
3527 | if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) { |
3528 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
3529 | "Not in PTKINITDONE; skip Group Key update"); | |
3c183894 | 3530 | sm->GUpdateStationKeys = FALSE; |
6fc6879b JM |
3531 | return 0; |
3532 | } | |
9663596f JM |
3533 | if (sm->GUpdateStationKeys) { |
3534 | /* | |
3c183894 JM |
3535 | * This should not really happen, so add a debug log entry. |
3536 | * Since we clear the GKeyDoneStations before the loop, the | |
3537 | * station needs to be counted here anyway. | |
9663596f JM |
3538 | */ |
3539 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
3c183894 JM |
3540 | "GUpdateStationKeys was already set when " |
3541 | "marking station for GTK rekeying"); | |
9663596f | 3542 | } |
3c183894 | 3543 | |
ad3872a3 | 3544 | /* Do not rekey GTK/IGTK when STA is in WNM-Sleep Mode */ |
d32d94db XC |
3545 | if (sm->is_wnmsleep) |
3546 | return 0; | |
d32d94db | 3547 | |
3c183894 JM |
3548 | sm->group->GKeyDoneStations++; |
3549 | sm->GUpdateStationKeys = TRUE; | |
3550 | ||
6fc6879b JM |
3551 | wpa_sm_step(sm); |
3552 | return 0; | |
3553 | } | |
3554 | ||
3555 | ||
b5bf84ba | 3556 | #ifdef CONFIG_WNM_AP |
ad3872a3 | 3557 | /* update GTK when exiting WNM-Sleep Mode */ |
d32d94db XC |
3558 | void wpa_wnmsleep_rekey_gtk(struct wpa_state_machine *sm) |
3559 | { | |
629edfef | 3560 | if (sm == NULL || sm->is_wnmsleep) |
d32d94db XC |
3561 | return; |
3562 | ||
3563 | wpa_group_update_sta(sm, NULL); | |
3564 | } | |
3565 | ||
3566 | ||
3567 | void wpa_set_wnmsleep(struct wpa_state_machine *sm, int flag) | |
3568 | { | |
629edfef JM |
3569 | if (sm) |
3570 | sm->is_wnmsleep = !!flag; | |
d32d94db XC |
3571 | } |
3572 | ||
3573 | ||
3574 | int wpa_wnmsleep_gtk_subelem(struct wpa_state_machine *sm, u8 *pos) | |
3575 | { | |
d32d94db | 3576 | struct wpa_group *gsm = sm->group; |
835822d4 | 3577 | u8 *start = pos; |
d32d94db XC |
3578 | |
3579 | /* | |
835822d4 | 3580 | * GTK subelement: |
d32d94db | 3581 | * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] | |
835822d4 | 3582 | * Key[5..32] |
d32d94db | 3583 | */ |
835822d4 JM |
3584 | *pos++ = WNM_SLEEP_SUBELEM_GTK; |
3585 | *pos++ = 11 + gsm->GTK_len; | |
d32d94db | 3586 | /* Key ID in B0-B1 of Key Info */ |
835822d4 JM |
3587 | WPA_PUT_LE16(pos, gsm->GN & 0x03); |
3588 | pos += 2; | |
3589 | *pos++ = gsm->GTK_len; | |
3590 | if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, pos) != 0) | |
d32d94db | 3591 | return 0; |
835822d4 JM |
3592 | pos += 8; |
3593 | os_memcpy(pos, gsm->GTK[gsm->GN - 1], gsm->GTK_len); | |
3594 | pos += gsm->GTK_len; | |
d32d94db | 3595 | |
835822d4 JM |
3596 | wpa_printf(MSG_DEBUG, "WNM: GTK Key ID %u in WNM-Sleep Mode exit", |
3597 | gsm->GN); | |
3598 | wpa_hexdump_key(MSG_DEBUG, "WNM: GTK in WNM-Sleep Mode exit", | |
d32d94db | 3599 | gsm->GTK[gsm->GN - 1], gsm->GTK_len); |
d32d94db | 3600 | |
835822d4 | 3601 | return pos - start; |
d32d94db XC |
3602 | } |
3603 | ||
3604 | ||
3605 | #ifdef CONFIG_IEEE80211W | |
3606 | int wpa_wnmsleep_igtk_subelem(struct wpa_state_machine *sm, u8 *pos) | |
3607 | { | |
d32d94db | 3608 | struct wpa_group *gsm = sm->group; |
835822d4 | 3609 | u8 *start = pos; |
8dd9f9cd | 3610 | size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher); |
d32d94db | 3611 | |
835822d4 JM |
3612 | /* |
3613 | * IGTK subelement: | |
3614 | * Sub-elem ID[1] | Length[1] | KeyID[2] | PN[6] | Key[16] | |
3615 | */ | |
3616 | *pos++ = WNM_SLEEP_SUBELEM_IGTK; | |
8dd9f9cd | 3617 | *pos++ = 2 + 6 + len; |
835822d4 JM |
3618 | WPA_PUT_LE16(pos, gsm->GN_igtk); |
3619 | pos += 2; | |
3620 | if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos) != 0) | |
d32d94db | 3621 | return 0; |
835822d4 | 3622 | pos += 6; |
d32d94db | 3623 | |
8dd9f9cd JM |
3624 | os_memcpy(pos, gsm->IGTK[gsm->GN_igtk - 4], len); |
3625 | pos += len; | |
d32d94db | 3626 | |
835822d4 JM |
3627 | wpa_printf(MSG_DEBUG, "WNM: IGTK Key ID %u in WNM-Sleep Mode exit", |
3628 | gsm->GN_igtk); | |
3629 | wpa_hexdump_key(MSG_DEBUG, "WNM: IGTK in WNM-Sleep Mode exit", | |
8dd9f9cd | 3630 | gsm->IGTK[gsm->GN_igtk - 4], len); |
d32d94db | 3631 | |
835822d4 | 3632 | return pos - start; |
d32d94db XC |
3633 | } |
3634 | #endif /* CONFIG_IEEE80211W */ | |
b5bf84ba | 3635 | #endif /* CONFIG_WNM_AP */ |
d32d94db XC |
3636 | |
3637 | ||
6fc6879b JM |
3638 | static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth, |
3639 | struct wpa_group *group) | |
3640 | { | |
3641 | int tmp; | |
3642 | ||
3643 | wpa_printf(MSG_DEBUG, "WPA: group state machine entering state " | |
3644 | "SETKEYS (VLAN-ID %d)", group->vlan_id); | |
3645 | group->changed = TRUE; | |
3646 | group->wpa_group_state = WPA_GROUP_SETKEYS; | |
3647 | group->GTKReKey = FALSE; | |
3648 | tmp = group->GM; | |
3649 | group->GM = group->GN; | |
3650 | group->GN = tmp; | |
3651 | #ifdef CONFIG_IEEE80211W | |
3652 | tmp = group->GM_igtk; | |
3653 | group->GM_igtk = group->GN_igtk; | |
3654 | group->GN_igtk = tmp; | |
3655 | #endif /* CONFIG_IEEE80211W */ | |
3656 | /* "GKeyDoneStations = GNoStations" is done in more robust way by | |
3657 | * counting the STAs that are marked with GUpdateStationKeys instead of | |
3658 | * including all STAs that could be in not-yet-completed state. */ | |
3659 | wpa_gtk_update(wpa_auth, group); | |
3660 | ||
3c183894 JM |
3661 | if (group->GKeyDoneStations) { |
3662 | wpa_printf(MSG_DEBUG, "wpa_group_setkeys: Unexpected " | |
3663 | "GKeyDoneStations=%d when starting new GTK rekey", | |
3664 | group->GKeyDoneStations); | |
3665 | group->GKeyDoneStations = 0; | |
3666 | } | |
473b6f22 | 3667 | wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, group); |
6fc6879b JM |
3668 | wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d", |
3669 | group->GKeyDoneStations); | |
3670 | } | |
3671 | ||
3672 | ||
1bdb7ab3 JM |
3673 | static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth, |
3674 | struct wpa_group *group) | |
6fc6879b | 3675 | { |
3c7302c2 JM |
3676 | int ret = 0; |
3677 | ||
3c7302c2 | 3678 | if (wpa_auth_set_key(wpa_auth, group->vlan_id, |
c3550295 | 3679 | wpa_cipher_to_alg(wpa_auth->conf.wpa_group), |
0382097e JM |
3680 | broadcast_ether_addr, group->GN, |
3681 | group->GTK[group->GN - 1], group->GTK_len) < 0) | |
3c7302c2 | 3682 | ret = -1; |
6fc6879b JM |
3683 | |
3684 | #ifdef CONFIG_IEEE80211W | |
8dd9f9cd JM |
3685 | if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) { |
3686 | enum wpa_alg alg; | |
3687 | size_t len; | |
3688 | ||
3689 | alg = wpa_cipher_to_alg(wpa_auth->conf.group_mgmt_cipher); | |
3690 | len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher); | |
3691 | ||
3692 | if (ret == 0 && | |
3693 | wpa_auth_set_key(wpa_auth, group->vlan_id, alg, | |
3694 | broadcast_ether_addr, group->GN_igtk, | |
3695 | group->IGTK[group->GN_igtk - 4], len) < 0) | |
3696 | ret = -1; | |
3697 | } | |
6fc6879b | 3698 | #endif /* CONFIG_IEEE80211W */ |
3c7302c2 JM |
3699 | |
3700 | return ret; | |
6fc6879b JM |
3701 | } |
3702 | ||
3703 | ||
7d7f7be2 JM |
3704 | static int wpa_group_disconnect_cb(struct wpa_state_machine *sm, void *ctx) |
3705 | { | |
3706 | if (sm->group == ctx) { | |
3707 | wpa_printf(MSG_DEBUG, "WPA: Mark STA " MACSTR | |
3708 | " for discconnection due to fatal failure", | |
3709 | MAC2STR(sm->addr)); | |
3710 | sm->Disconnect = TRUE; | |
3711 | } | |
3712 | ||
3713 | return 0; | |
3714 | } | |
3715 | ||
3716 | ||
3717 | static void wpa_group_fatal_failure(struct wpa_authenticator *wpa_auth, | |
3718 | struct wpa_group *group) | |
3719 | { | |
3720 | wpa_printf(MSG_DEBUG, "WPA: group state machine entering state FATAL_FAILURE"); | |
3721 | group->changed = TRUE; | |
3722 | group->wpa_group_state = WPA_GROUP_FATAL_FAILURE; | |
3723 | wpa_auth_for_each_sta(wpa_auth, wpa_group_disconnect_cb, group); | |
3724 | } | |
3725 | ||
3726 | ||
1bdb7ab3 JM |
3727 | static int wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth, |
3728 | struct wpa_group *group) | |
3729 | { | |
3730 | wpa_printf(MSG_DEBUG, "WPA: group state machine entering state " | |
3731 | "SETKEYSDONE (VLAN-ID %d)", group->vlan_id); | |
3732 | group->changed = TRUE; | |
3733 | group->wpa_group_state = WPA_GROUP_SETKEYSDONE; | |
3734 | ||
7d7f7be2 JM |
3735 | if (wpa_group_config_group_keys(wpa_auth, group) < 0) { |
3736 | wpa_group_fatal_failure(wpa_auth, group); | |
1bdb7ab3 | 3737 | return -1; |
7d7f7be2 | 3738 | } |
1bdb7ab3 JM |
3739 | |
3740 | return 0; | |
3741 | } | |
3742 | ||
3743 | ||
6fc6879b JM |
3744 | static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth, |
3745 | struct wpa_group *group) | |
3746 | { | |
3747 | if (group->GInit) { | |
3748 | wpa_group_gtk_init(wpa_auth, group); | |
7d7f7be2 JM |
3749 | } else if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) { |
3750 | /* Do not allow group operations */ | |
6fc6879b JM |
3751 | } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT && |
3752 | group->GTKAuthenticator) { | |
3753 | wpa_group_setkeysdone(wpa_auth, group); | |
3754 | } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE && | |
3755 | group->GTKReKey) { | |
3756 | wpa_group_setkeys(wpa_auth, group); | |
3757 | } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) { | |
3758 | if (group->GKeyDoneStations == 0) | |
3759 | wpa_group_setkeysdone(wpa_auth, group); | |
3760 | else if (group->GTKReKey) | |
3761 | wpa_group_setkeys(wpa_auth, group); | |
3762 | } | |
3763 | } | |
3764 | ||
3765 | ||
e4a6ea1d | 3766 | static int wpa_sm_step(struct wpa_state_machine *sm) |
6fc6879b JM |
3767 | { |
3768 | if (sm == NULL) | |
e4a6ea1d | 3769 | return 0; |
6fc6879b JM |
3770 | |
3771 | if (sm->in_step_loop) { | |
3772 | /* This should not happen, but if it does, make sure we do not | |
3773 | * end up freeing the state machine too early by exiting the | |
3774 | * recursive call. */ | |
3775 | wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively"); | |
e4a6ea1d | 3776 | return 0; |
6fc6879b JM |
3777 | } |
3778 | ||
3779 | sm->in_step_loop = 1; | |
3780 | do { | |
3781 | if (sm->pending_deinit) | |
3782 | break; | |
3783 | ||
3784 | sm->changed = FALSE; | |
3785 | sm->wpa_auth->group->changed = FALSE; | |
3786 | ||
3787 | SM_STEP_RUN(WPA_PTK); | |
3788 | if (sm->pending_deinit) | |
3789 | break; | |
3790 | SM_STEP_RUN(WPA_PTK_GROUP); | |
3791 | if (sm->pending_deinit) | |
3792 | break; | |
3793 | wpa_group_sm_step(sm->wpa_auth, sm->group); | |
3794 | } while (sm->changed || sm->wpa_auth->group->changed); | |
3795 | sm->in_step_loop = 0; | |
3796 | ||
3797 | if (sm->pending_deinit) { | |
3798 | wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state " | |
3799 | "machine deinit for " MACSTR, MAC2STR(sm->addr)); | |
3800 | wpa_free_sta_sm(sm); | |
e4a6ea1d | 3801 | return 1; |
6fc6879b | 3802 | } |
e4a6ea1d | 3803 | return 0; |
6fc6879b JM |
3804 | } |
3805 | ||
3806 | ||
3807 | static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx) | |
3808 | { | |
3809 | struct wpa_state_machine *sm = eloop_ctx; | |
3810 | wpa_sm_step(sm); | |
3811 | } | |
3812 | ||
3813 | ||
3814 | void wpa_auth_sm_notify(struct wpa_state_machine *sm) | |
3815 | { | |
3816 | if (sm == NULL) | |
3817 | return; | |
3818 | eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL); | |
3819 | } | |
3820 | ||
3821 | ||
3822 | void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth) | |
3823 | { | |
3824 | int tmp, i; | |
3825 | struct wpa_group *group; | |
3826 | ||
3827 | if (wpa_auth == NULL) | |
3828 | return; | |
3829 | ||
3830 | group = wpa_auth->group; | |
3831 | ||
3832 | for (i = 0; i < 2; i++) { | |
3833 | tmp = group->GM; | |
3834 | group->GM = group->GN; | |
3835 | group->GN = tmp; | |
3836 | #ifdef CONFIG_IEEE80211W | |
3837 | tmp = group->GM_igtk; | |
3838 | group->GM_igtk = group->GN_igtk; | |
3839 | group->GN_igtk = tmp; | |
3840 | #endif /* CONFIG_IEEE80211W */ | |
3841 | wpa_gtk_update(wpa_auth, group); | |
9354e594 | 3842 | wpa_group_config_group_keys(wpa_auth, group); |
6fc6879b JM |
3843 | } |
3844 | } | |
3845 | ||
3846 | ||
a6da824b | 3847 | static const char * wpa_bool_txt(int val) |
6fc6879b | 3848 | { |
a6da824b | 3849 | return val ? "TRUE" : "FALSE"; |
6fc6879b JM |
3850 | } |
3851 | ||
3852 | ||
6fc6879b JM |
3853 | #define RSN_SUITE "%02x-%02x-%02x-%d" |
3854 | #define RSN_SUITE_ARG(s) \ | |
3855 | ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff | |
3856 | ||
3857 | int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen) | |
3858 | { | |
3859 | int len = 0, ret; | |
3860 | char pmkid_txt[PMKID_LEN * 2 + 1]; | |
8ce58ceb IH |
3861 | #ifdef CONFIG_RSN_PREAUTH |
3862 | const int preauth = 1; | |
3863 | #else /* CONFIG_RSN_PREAUTH */ | |
3864 | const int preauth = 0; | |
3865 | #endif /* CONFIG_RSN_PREAUTH */ | |
6fc6879b JM |
3866 | |
3867 | if (wpa_auth == NULL) | |
3868 | return len; | |
3869 | ||
3870 | ret = os_snprintf(buf + len, buflen - len, | |
3871 | "dot11RSNAOptionImplemented=TRUE\n" | |
8ce58ceb | 3872 | "dot11RSNAPreauthenticationImplemented=%s\n" |
6fc6879b JM |
3873 | "dot11RSNAEnabled=%s\n" |
3874 | "dot11RSNAPreauthenticationEnabled=%s\n", | |
8ce58ceb | 3875 | wpa_bool_txt(preauth), |
6fc6879b JM |
3876 | wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN), |
3877 | wpa_bool_txt(wpa_auth->conf.rsn_preauth)); | |
d85e1fc8 | 3878 | if (os_snprintf_error(buflen - len, ret)) |
6fc6879b JM |
3879 | return len; |
3880 | len += ret; | |
3881 | ||
3882 | wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt), | |
3883 | wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN); | |
3884 | ||
3885 | ret = os_snprintf( | |
3886 | buf + len, buflen - len, | |
3887 | "dot11RSNAConfigVersion=%u\n" | |
3888 | "dot11RSNAConfigPairwiseKeysSupported=9999\n" | |
3889 | /* FIX: dot11RSNAConfigGroupCipher */ | |
3890 | /* FIX: dot11RSNAConfigGroupRekeyMethod */ | |
3891 | /* FIX: dot11RSNAConfigGroupRekeyTime */ | |
3892 | /* FIX: dot11RSNAConfigGroupRekeyPackets */ | |
3893 | "dot11RSNAConfigGroupRekeyStrict=%u\n" | |
3894 | "dot11RSNAConfigGroupUpdateCount=%u\n" | |
3895 | "dot11RSNAConfigPairwiseUpdateCount=%u\n" | |
3896 | "dot11RSNAConfigGroupCipherSize=%u\n" | |
3897 | "dot11RSNAConfigPMKLifetime=%u\n" | |
3898 | "dot11RSNAConfigPMKReauthThreshold=%u\n" | |
3899 | "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n" | |
3900 | "dot11RSNAConfigSATimeout=%u\n" | |
3901 | "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n" | |
3902 | "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n" | |
3903 | "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n" | |
3904 | "dot11RSNAPMKIDUsed=%s\n" | |
3905 | "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n" | |
3906 | "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n" | |
3907 | "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n" | |
3908 | "dot11RSNATKIPCounterMeasuresInvoked=%u\n" | |
3909 | "dot11RSNA4WayHandshakeFailures=%u\n" | |
3910 | "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n", | |
3911 | RSN_VERSION, | |
3912 | !!wpa_auth->conf.wpa_strict_rekey, | |
41f140d3 GK |
3913 | wpa_auth->conf.wpa_group_update_count, |
3914 | wpa_auth->conf.wpa_pairwise_update_count, | |
c3550295 | 3915 | wpa_cipher_key_len(wpa_auth->conf.wpa_group) * 8, |
6fc6879b JM |
3916 | dot11RSNAConfigPMKLifetime, |
3917 | dot11RSNAConfigPMKReauthThreshold, | |
3918 | dot11RSNAConfigSATimeout, | |
3919 | RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected), | |
3920 | RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected), | |
3921 | RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected), | |
3922 | pmkid_txt, | |
3923 | RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested), | |
3924 | RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested), | |
3925 | RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested), | |
3926 | wpa_auth->dot11RSNATKIPCounterMeasuresInvoked, | |
3927 | wpa_auth->dot11RSNA4WayHandshakeFailures); | |
d85e1fc8 | 3928 | if (os_snprintf_error(buflen - len, ret)) |
6fc6879b JM |
3929 | return len; |
3930 | len += ret; | |
3931 | ||
3932 | /* TODO: dot11RSNAConfigPairwiseCiphersTable */ | |
3933 | /* TODO: dot11RSNAConfigAuthenticationSuitesTable */ | |
3934 | ||
3935 | /* Private MIB */ | |
3936 | ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n", | |
3937 | wpa_auth->group->wpa_group_state); | |
d85e1fc8 | 3938 | if (os_snprintf_error(buflen - len, ret)) |
6fc6879b JM |
3939 | return len; |
3940 | len += ret; | |
3941 | ||
3942 | return len; | |
3943 | } | |
3944 | ||
3945 | ||
3946 | int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen) | |
3947 | { | |
3948 | int len = 0, ret; | |
3949 | u32 pairwise = 0; | |
3950 | ||
3951 | if (sm == NULL) | |
3952 | return 0; | |
3953 | ||
3954 | /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */ | |
3955 | ||
3956 | /* dot11RSNAStatsEntry */ | |
3957 | ||
c3550295 JM |
3958 | pairwise = wpa_cipher_to_suite(sm->wpa == WPA_VERSION_WPA2 ? |
3959 | WPA_PROTO_RSN : WPA_PROTO_WPA, | |
3960 | sm->pairwise); | |
3961 | if (pairwise == 0) | |
6fc6879b JM |
3962 | return 0; |
3963 | ||
3964 | ret = os_snprintf( | |
3965 | buf + len, buflen - len, | |
3966 | /* TODO: dot11RSNAStatsIndex */ | |
3967 | "dot11RSNAStatsSTAAddress=" MACSTR "\n" | |
3968 | "dot11RSNAStatsVersion=1\n" | |
3969 | "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n" | |
3970 | /* TODO: dot11RSNAStatsTKIPICVErrors */ | |
3971 | "dot11RSNAStatsTKIPLocalMICFailures=%u\n" | |
d9040cdb | 3972 | "dot11RSNAStatsTKIPRemoteMICFailures=%u\n" |
6fc6879b JM |
3973 | /* TODO: dot11RSNAStatsCCMPReplays */ |
3974 | /* TODO: dot11RSNAStatsCCMPDecryptErrors */ | |
3975 | /* TODO: dot11RSNAStatsTKIPReplays */, | |
3976 | MAC2STR(sm->addr), | |
3977 | RSN_SUITE_ARG(pairwise), | |
3978 | sm->dot11RSNAStatsTKIPLocalMICFailures, | |
3979 | sm->dot11RSNAStatsTKIPRemoteMICFailures); | |
d85e1fc8 | 3980 | if (os_snprintf_error(buflen - len, ret)) |
6fc6879b JM |
3981 | return len; |
3982 | len += ret; | |
3983 | ||
3984 | /* Private MIB */ | |
3985 | ret = os_snprintf(buf + len, buflen - len, | |
3986 | "hostapdWPAPTKState=%d\n" | |
3987 | "hostapdWPAPTKGroupState=%d\n", | |
3988 | sm->wpa_ptk_state, | |
3989 | sm->wpa_ptk_group_state); | |
d85e1fc8 | 3990 | if (os_snprintf_error(buflen - len, ret)) |
6fc6879b JM |
3991 | return len; |
3992 | len += ret; | |
3993 | ||
3994 | return len; | |
3995 | } | |
3996 | ||
3997 | ||
3998 | void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth) | |
3999 | { | |
4000 | if (wpa_auth) | |
4001 | wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++; | |
4002 | } | |
4003 | ||
4004 | ||
4005 | int wpa_auth_pairwise_set(struct wpa_state_machine *sm) | |
4006 | { | |
4007 | return sm && sm->pairwise_set; | |
4008 | } | |
4009 | ||
4010 | ||
ff36ff00 JM |
4011 | int wpa_auth_get_pairwise(struct wpa_state_machine *sm) |
4012 | { | |
4013 | return sm->pairwise; | |
4014 | } | |
4015 | ||
4016 | ||
6fc6879b JM |
4017 | int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm) |
4018 | { | |
4019 | if (sm == NULL) | |
4020 | return -1; | |
4021 | return sm->wpa_key_mgmt; | |
4022 | } | |
4023 | ||
4024 | ||
4025 | int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm) | |
4026 | { | |
4027 | if (sm == NULL) | |
4028 | return 0; | |
4029 | return sm->wpa; | |
4030 | } | |
4031 | ||
4032 | ||
0e3bd7ac MV |
4033 | int wpa_auth_sta_ft_tk_already_set(struct wpa_state_machine *sm) |
4034 | { | |
4035 | if (!sm || !wpa_key_mgmt_ft(sm->wpa_key_mgmt)) | |
4036 | return 0; | |
4037 | return sm->tk_already_set; | |
4038 | } | |
4039 | ||
4040 | ||
2f1357fb JM |
4041 | int wpa_auth_sta_fils_tk_already_set(struct wpa_state_machine *sm) |
4042 | { | |
4043 | if (!sm || !wpa_key_mgmt_fils(sm->wpa_key_mgmt)) | |
4044 | return 0; | |
4045 | return sm->tk_already_set; | |
4046 | } | |
4047 | ||
4048 | ||
6fc6879b JM |
4049 | int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm, |
4050 | struct rsn_pmksa_cache_entry *entry) | |
4051 | { | |
4052 | if (sm == NULL || sm->pmksa != entry) | |
4053 | return -1; | |
4054 | sm->pmksa = NULL; | |
4055 | return 0; | |
4056 | } | |
4057 | ||
4058 | ||
4059 | struct rsn_pmksa_cache_entry * | |
4060 | wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm) | |
4061 | { | |
4062 | return sm ? sm->pmksa : NULL; | |
4063 | } | |
4064 | ||
4065 | ||
4066 | void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm) | |
4067 | { | |
4068 | if (sm) | |
4069 | sm->dot11RSNAStatsTKIPLocalMICFailures++; | |
4070 | } | |
4071 | ||
4072 | ||
4073 | const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len) | |
4074 | { | |
4075 | if (wpa_auth == NULL) | |
4076 | return NULL; | |
4077 | *len = wpa_auth->wpa_ie_len; | |
4078 | return wpa_auth->wpa_ie; | |
4079 | } | |
4080 | ||
4081 | ||
4082 | int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk, | |
207976f0 | 4083 | unsigned int pmk_len, |
6fc6879b JM |
4084 | int session_timeout, struct eapol_state_machine *eapol) |
4085 | { | |
cb465555 JM |
4086 | if (sm == NULL || sm->wpa != WPA_VERSION_WPA2 || |
4087 | sm->wpa_auth->conf.disable_pmksa_caching) | |
6fc6879b JM |
4088 | return -1; |
4089 | ||
834c5d68 | 4090 | if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) { |
207976f0 JM |
4091 | if (pmk_len > PMK_LEN_SUITE_B_192) |
4092 | pmk_len = PMK_LEN_SUITE_B_192; | |
4093 | } else if (pmk_len > PMK_LEN) { | |
4094 | pmk_len = PMK_LEN; | |
4095 | } | |
4096 | ||
70c93963 | 4097 | if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, pmk_len, NULL, |
98cd3d1c | 4098 | sm->PTK.kck, sm->PTK.kck_len, |
4bb081f1 JM |
4099 | sm->wpa_auth->addr, sm->addr, session_timeout, |
4100 | eapol, sm->wpa_key_mgmt)) | |
6fc6879b JM |
4101 | return 0; |
4102 | ||
4103 | return -1; | |
4104 | } | |
4105 | ||
4106 | ||
4107 | int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth, | |
4108 | const u8 *pmk, size_t len, const u8 *sta_addr, | |
4109 | int session_timeout, | |
4110 | struct eapol_state_machine *eapol) | |
4111 | { | |
4112 | if (wpa_auth == NULL) | |
4113 | return -1; | |
4114 | ||
70c93963 | 4115 | if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len, NULL, |
087a1f4e JM |
4116 | NULL, 0, |
4117 | wpa_auth->addr, | |
4bb081f1 JM |
4118 | sta_addr, session_timeout, eapol, |
4119 | WPA_KEY_MGMT_IEEE8021X)) | |
6fc6879b JM |
4120 | return 0; |
4121 | ||
4122 | return -1; | |
4123 | } | |
4124 | ||
4125 | ||
f2991170 | 4126 | int wpa_auth_pmksa_add_sae(struct wpa_authenticator *wpa_auth, const u8 *addr, |
70c93963 | 4127 | const u8 *pmk, const u8 *pmkid) |
f2991170 JM |
4128 | { |
4129 | if (wpa_auth->conf.disable_pmksa_caching) | |
4130 | return -1; | |
4131 | ||
70c93963 | 4132 | if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, PMK_LEN, pmkid, |
087a1f4e | 4133 | NULL, 0, |
f2991170 JM |
4134 | wpa_auth->addr, addr, 0, NULL, |
4135 | WPA_KEY_MGMT_SAE)) | |
4136 | return 0; | |
4137 | ||
4138 | return -1; | |
4139 | } | |
4140 | ||
4141 | ||
9d94e4bb JM |
4142 | void wpa_auth_add_sae_pmkid(struct wpa_state_machine *sm, const u8 *pmkid) |
4143 | { | |
4144 | os_memcpy(sm->pmkid, pmkid, PMKID_LEN); | |
4145 | sm->pmkid_set = 1; | |
4146 | } | |
4147 | ||
4148 | ||
0c52953b JM |
4149 | int wpa_auth_pmksa_add2(struct wpa_authenticator *wpa_auth, const u8 *addr, |
4150 | const u8 *pmk, size_t pmk_len, const u8 *pmkid, | |
4151 | int session_timeout, int akmp) | |
4152 | { | |
4153 | if (wpa_auth->conf.disable_pmksa_caching) | |
4154 | return -1; | |
4155 | ||
4156 | if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, pmk_len, pmkid, | |
4157 | NULL, 0, wpa_auth->addr, addr, session_timeout, | |
4158 | NULL, akmp)) | |
4159 | return 0; | |
4160 | ||
4161 | return -1; | |
4162 | } | |
4163 | ||
4164 | ||
901d1fe1 JM |
4165 | void wpa_auth_pmksa_remove(struct wpa_authenticator *wpa_auth, |
4166 | const u8 *sta_addr) | |
4167 | { | |
4168 | struct rsn_pmksa_cache_entry *pmksa; | |
4169 | ||
4170 | if (wpa_auth == NULL || wpa_auth->pmksa == NULL) | |
4171 | return; | |
4172 | pmksa = pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, NULL); | |
4173 | if (pmksa) { | |
4174 | wpa_printf(MSG_DEBUG, "WPA: Remove PMKSA cache entry for " | |
4175 | MACSTR " based on request", MAC2STR(sta_addr)); | |
4176 | pmksa_cache_free_entry(wpa_auth->pmksa, pmksa); | |
4177 | } | |
4178 | } | |
4179 | ||
4180 | ||
b8daac18 MH |
4181 | int wpa_auth_pmksa_list(struct wpa_authenticator *wpa_auth, char *buf, |
4182 | size_t len) | |
4183 | { | |
4184 | if (!wpa_auth || !wpa_auth->pmksa) | |
4185 | return 0; | |
4186 | return pmksa_cache_auth_list(wpa_auth->pmksa, buf, len); | |
4187 | } | |
4188 | ||
4189 | ||
4c522c77 MH |
4190 | void wpa_auth_pmksa_flush(struct wpa_authenticator *wpa_auth) |
4191 | { | |
4192 | if (wpa_auth && wpa_auth->pmksa) | |
4193 | pmksa_cache_auth_flush(wpa_auth->pmksa); | |
4194 | } | |
4195 | ||
4196 | ||
4d77d80e MH |
4197 | #ifdef CONFIG_PMKSA_CACHE_EXTERNAL |
4198 | #ifdef CONFIG_MESH | |
4199 | ||
4200 | int wpa_auth_pmksa_list_mesh(struct wpa_authenticator *wpa_auth, const u8 *addr, | |
4201 | char *buf, size_t len) | |
4202 | { | |
4203 | if (!wpa_auth || !wpa_auth->pmksa) | |
4204 | return 0; | |
4205 | ||
4206 | return pmksa_cache_auth_list_mesh(wpa_auth->pmksa, addr, buf, len); | |
4207 | } | |
4208 | ||
4209 | ||
4210 | struct rsn_pmksa_cache_entry * | |
4211 | wpa_auth_pmksa_create_entry(const u8 *aa, const u8 *spa, const u8 *pmk, | |
4212 | const u8 *pmkid, int expiration) | |
4213 | { | |
4214 | struct rsn_pmksa_cache_entry *entry; | |
4215 | struct os_reltime now; | |
4216 | ||
4217 | entry = pmksa_cache_auth_create_entry(pmk, PMK_LEN, pmkid, NULL, 0, aa, | |
4218 | spa, 0, NULL, WPA_KEY_MGMT_SAE); | |
4219 | if (!entry) | |
4220 | return NULL; | |
4221 | ||
4222 | os_get_reltime(&now); | |
4223 | entry->expiration = now.sec + expiration; | |
4224 | return entry; | |
4225 | } | |
4226 | ||
4227 | ||
4228 | int wpa_auth_pmksa_add_entry(struct wpa_authenticator *wpa_auth, | |
4229 | struct rsn_pmksa_cache_entry *entry) | |
4230 | { | |
4231 | int ret; | |
4232 | ||
4233 | if (!wpa_auth || !wpa_auth->pmksa) | |
4234 | return -1; | |
4235 | ||
4236 | ret = pmksa_cache_auth_add_entry(wpa_auth->pmksa, entry); | |
4237 | if (ret < 0) | |
4238 | wpa_printf(MSG_DEBUG, | |
4239 | "RSN: Failed to store external PMKSA cache for " | |
4240 | MACSTR, MAC2STR(entry->spa)); | |
4241 | ||
4242 | return ret; | |
4243 | } | |
4244 | ||
4245 | #endif /* CONFIG_MESH */ | |
4246 | #endif /* CONFIG_PMKSA_CACHE_EXTERNAL */ | |
4247 | ||
4248 | ||
9f2cf23e | 4249 | struct rsn_pmksa_cache_entry * |
c1bd4bac JM |
4250 | wpa_auth_pmksa_get(struct wpa_authenticator *wpa_auth, const u8 *sta_addr, |
4251 | const u8 *pmkid) | |
9f2cf23e MH |
4252 | { |
4253 | if (!wpa_auth || !wpa_auth->pmksa) | |
4254 | return NULL; | |
c1bd4bac | 4255 | return pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, pmkid); |
9f2cf23e MH |
4256 | } |
4257 | ||
4258 | ||
4259 | void wpa_auth_pmksa_set_to_sm(struct rsn_pmksa_cache_entry *pmksa, | |
4260 | struct wpa_state_machine *sm, | |
4261 | struct wpa_authenticator *wpa_auth, | |
4262 | u8 *pmkid, u8 *pmk) | |
4263 | { | |
4264 | if (!sm) | |
4265 | return; | |
4266 | ||
4267 | sm->pmksa = pmksa; | |
8854f90b JM |
4268 | os_memcpy(pmk, pmksa->pmk, PMK_LEN); |
4269 | os_memcpy(pmkid, pmksa->pmkid, PMKID_LEN); | |
4270 | os_memcpy(wpa_auth->dot11RSNAPMKIDUsed, pmksa->pmkid, PMKID_LEN); | |
9f2cf23e MH |
4271 | } |
4272 | ||
4273 | ||
a0ad9e8c MB |
4274 | /* |
4275 | * Remove and free the group from wpa_authenticator. This is triggered by a | |
4276 | * callback to make sure nobody is currently iterating the group list while it | |
4277 | * gets modified. | |
4278 | */ | |
4279 | static void wpa_group_free(struct wpa_authenticator *wpa_auth, | |
4280 | struct wpa_group *group) | |
4281 | { | |
4282 | struct wpa_group *prev = wpa_auth->group; | |
4283 | ||
4284 | wpa_printf(MSG_DEBUG, "WPA: Remove group state machine for VLAN-ID %d", | |
4285 | group->vlan_id); | |
4286 | ||
4287 | while (prev) { | |
4288 | if (prev->next == group) { | |
4289 | /* This never frees the special first group as needed */ | |
4290 | prev->next = group->next; | |
4291 | os_free(group); | |
4292 | break; | |
4293 | } | |
4294 | prev = prev->next; | |
4295 | } | |
4296 | ||
4297 | } | |
4298 | ||
4299 | ||
4300 | /* Increase the reference counter for group */ | |
4301 | static void wpa_group_get(struct wpa_authenticator *wpa_auth, | |
4302 | struct wpa_group *group) | |
4303 | { | |
4304 | /* Skip the special first group */ | |
4305 | if (wpa_auth->group == group) | |
4306 | return; | |
4307 | ||
4308 | group->references++; | |
4309 | } | |
4310 | ||
4311 | ||
4312 | /* Decrease the reference counter and maybe free the group */ | |
4313 | static void wpa_group_put(struct wpa_authenticator *wpa_auth, | |
4314 | struct wpa_group *group) | |
4315 | { | |
4316 | /* Skip the special first group */ | |
4317 | if (wpa_auth->group == group) | |
4318 | return; | |
4319 | ||
4320 | group->references--; | |
4321 | if (group->references) | |
4322 | return; | |
4323 | wpa_group_free(wpa_auth, group); | |
4324 | } | |
4325 | ||
4326 | ||
4327 | /* | |
4328 | * Add a group that has its references counter set to zero. Caller needs to | |
4329 | * call wpa_group_get() on the return value to mark the entry in use. | |
4330 | */ | |
6fc6879b JM |
4331 | static struct wpa_group * |
4332 | wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id) | |
4333 | { | |
4334 | struct wpa_group *group; | |
4335 | ||
4336 | if (wpa_auth == NULL || wpa_auth->group == NULL) | |
4337 | return NULL; | |
4338 | ||
4339 | wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d", | |
4340 | vlan_id); | |
bdffdc5d | 4341 | group = wpa_group_init(wpa_auth, vlan_id, 0); |
6fc6879b JM |
4342 | if (group == NULL) |
4343 | return NULL; | |
4344 | ||
4345 | group->next = wpa_auth->group->next; | |
4346 | wpa_auth->group->next = group; | |
4347 | ||
4348 | return group; | |
4349 | } | |
4350 | ||
4351 | ||
7cebc8e2 MB |
4352 | /* |
4353 | * Enforce that the group state machine for the VLAN is running, increase | |
4354 | * reference counter as interface is up. References might have been increased | |
4355 | * even if a negative value is returned. | |
4356 | * Returns: -1 on error (group missing, group already failed); otherwise, 0 | |
4357 | */ | |
4358 | int wpa_auth_ensure_group(struct wpa_authenticator *wpa_auth, int vlan_id) | |
4359 | { | |
4360 | struct wpa_group *group; | |
4361 | ||
4362 | if (wpa_auth == NULL) | |
4363 | return 0; | |
4364 | ||
4365 | group = wpa_auth->group; | |
4366 | while (group) { | |
4367 | if (group->vlan_id == vlan_id) | |
4368 | break; | |
4369 | group = group->next; | |
4370 | } | |
4371 | ||
4372 | if (group == NULL) { | |
4373 | group = wpa_auth_add_group(wpa_auth, vlan_id); | |
4374 | if (group == NULL) | |
4375 | return -1; | |
4376 | } | |
4377 | ||
4378 | wpa_printf(MSG_DEBUG, | |
4379 | "WPA: Ensure group state machine running for VLAN ID %d", | |
4380 | vlan_id); | |
4381 | ||
4382 | wpa_group_get(wpa_auth, group); | |
4383 | group->num_setup_iface++; | |
4384 | ||
4385 | if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) | |
4386 | return -1; | |
4387 | ||
4388 | return 0; | |
4389 | } | |
4390 | ||
4391 | ||
4392 | /* | |
4393 | * Decrease reference counter, expected to be zero afterwards. | |
4394 | * returns: -1 on error (group not found, group in fail state) | |
4395 | * -2 if wpa_group is still referenced | |
4396 | * 0 else | |
4397 | */ | |
4398 | int wpa_auth_release_group(struct wpa_authenticator *wpa_auth, int vlan_id) | |
4399 | { | |
4400 | struct wpa_group *group; | |
4401 | int ret = 0; | |
4402 | ||
4403 | if (wpa_auth == NULL) | |
4404 | return 0; | |
4405 | ||
4406 | group = wpa_auth->group; | |
4407 | while (group) { | |
4408 | if (group->vlan_id == vlan_id) | |
4409 | break; | |
4410 | group = group->next; | |
4411 | } | |
4412 | ||
4413 | if (group == NULL) | |
4414 | return -1; | |
4415 | ||
4416 | wpa_printf(MSG_DEBUG, | |
4417 | "WPA: Try stopping group state machine for VLAN ID %d", | |
4418 | vlan_id); | |
4419 | ||
4420 | if (group->num_setup_iface <= 0) { | |
4421 | wpa_printf(MSG_ERROR, | |
4422 | "WPA: wpa_auth_release_group called more often than wpa_auth_ensure_group for VLAN ID %d, skipping.", | |
4423 | vlan_id); | |
4424 | return -1; | |
4425 | } | |
4426 | group->num_setup_iface--; | |
4427 | ||
4428 | if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) | |
4429 | ret = -1; | |
4430 | ||
4431 | if (group->references > 1) { | |
4432 | wpa_printf(MSG_DEBUG, | |
4433 | "WPA: Cannot stop group state machine for VLAN ID %d as references are still hold", | |
4434 | vlan_id); | |
4435 | ret = -2; | |
4436 | } | |
4437 | ||
4438 | wpa_group_put(wpa_auth, group); | |
4439 | ||
4440 | return ret; | |
4441 | } | |
4442 | ||
4443 | ||
6fc6879b JM |
4444 | int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id) |
4445 | { | |
4446 | struct wpa_group *group; | |
4447 | ||
4448 | if (sm == NULL || sm->wpa_auth == NULL) | |
4449 | return 0; | |
4450 | ||
4451 | group = sm->wpa_auth->group; | |
4452 | while (group) { | |
4453 | if (group->vlan_id == vlan_id) | |
4454 | break; | |
4455 | group = group->next; | |
4456 | } | |
4457 | ||
4458 | if (group == NULL) { | |
4459 | group = wpa_auth_add_group(sm->wpa_auth, vlan_id); | |
4460 | if (group == NULL) | |
4461 | return -1; | |
4462 | } | |
4463 | ||
4464 | if (sm->group == group) | |
4465 | return 0; | |
4466 | ||
7d7f7be2 JM |
4467 | if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) |
4468 | return -1; | |
4469 | ||
6fc6879b JM |
4470 | wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state " |
4471 | "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id); | |
4472 | ||
a0ad9e8c MB |
4473 | wpa_group_get(sm->wpa_auth, group); |
4474 | wpa_group_put(sm->wpa_auth, sm->group); | |
6fc6879b | 4475 | sm->group = group; |
a0ad9e8c | 4476 | |
6fc6879b JM |
4477 | return 0; |
4478 | } | |
e4bf4db9 JM |
4479 | |
4480 | ||
4481 | void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth, | |
4482 | struct wpa_state_machine *sm, int ack) | |
4483 | { | |
4484 | if (wpa_auth == NULL || sm == NULL) | |
4485 | return; | |
4486 | wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key TX status for STA " MACSTR | |
4487 | " ack=%d", MAC2STR(sm->addr), ack); | |
4488 | if (sm->pending_1_of_4_timeout && ack) { | |
4489 | /* | |
4490 | * Some deployed supplicant implementations update their SNonce | |
4491 | * for each EAPOL-Key 2/4 message even within the same 4-way | |
4492 | * handshake and then fail to use the first SNonce when | |
4493 | * deriving the PTK. This results in unsuccessful 4-way | |
4494 | * handshake whenever the relatively short initial timeout is | |
4495 | * reached and EAPOL-Key 1/4 is retransmitted. Try to work | |
4496 | * around this by increasing the timeout now that we know that | |
4497 | * the station has received the frame. | |
4498 | */ | |
4499 | int timeout_ms = eapol_key_timeout_subseq; | |
4500 | wpa_printf(MSG_DEBUG, "WPA: Increase initial EAPOL-Key 1/4 " | |
4501 | "timeout by %u ms because of acknowledged frame", | |
4502 | timeout_ms); | |
4503 | eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm); | |
4504 | eloop_register_timeout(timeout_ms / 1000, | |
4505 | (timeout_ms % 1000) * 1000, | |
4506 | wpa_send_eapol_timeout, wpa_auth, sm); | |
4507 | } | |
3d695328 JM |
4508 | |
4509 | #ifdef CONFIG_TESTING_OPTIONS | |
4510 | if (sm->eapol_status_cb) { | |
4511 | sm->eapol_status_cb(sm->eapol_status_cb_ctx1, | |
4512 | sm->eapol_status_cb_ctx2); | |
4513 | sm->eapol_status_cb = NULL; | |
4514 | } | |
4515 | #endif /* CONFIG_TESTING_OPTIONS */ | |
e4bf4db9 | 4516 | } |
c10347f2 JM |
4517 | |
4518 | ||
4519 | int wpa_auth_uses_sae(struct wpa_state_machine *sm) | |
4520 | { | |
4521 | if (sm == NULL) | |
4522 | return 0; | |
4523 | return wpa_key_mgmt_sae(sm->wpa_key_mgmt); | |
4524 | } | |
aa189ac9 JM |
4525 | |
4526 | ||
4527 | int wpa_auth_uses_ft_sae(struct wpa_state_machine *sm) | |
4528 | { | |
4529 | if (sm == NULL) | |
4530 | return 0; | |
4531 | return sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_SAE; | |
4532 | } | |
25ef8529 JM |
4533 | |
4534 | ||
4535 | #ifdef CONFIG_P2P | |
4536 | int wpa_auth_get_ip_addr(struct wpa_state_machine *sm, u8 *addr) | |
4537 | { | |
4538 | if (sm == NULL || WPA_GET_BE32(sm->ip_addr) == 0) | |
4539 | return -1; | |
4540 | os_memcpy(addr, sm->ip_addr, 4); | |
4541 | return 0; | |
4542 | } | |
4543 | #endif /* CONFIG_P2P */ | |
cbc210de JM |
4544 | |
4545 | ||
4546 | int wpa_auth_radius_das_disconnect_pmksa(struct wpa_authenticator *wpa_auth, | |
4547 | struct radius_das_attrs *attr) | |
4548 | { | |
4549 | return pmksa_cache_auth_radius_das_disconnect(wpa_auth->pmksa, attr); | |
4550 | } | |
34782730 JM |
4551 | |
4552 | ||
4553 | void wpa_auth_reconfig_group_keys(struct wpa_authenticator *wpa_auth) | |
4554 | { | |
4555 | struct wpa_group *group; | |
4556 | ||
4557 | if (!wpa_auth) | |
4558 | return; | |
4559 | for (group = wpa_auth->group; group; group = group->next) | |
4560 | wpa_group_config_group_keys(wpa_auth, group); | |
4561 | } | |
7eace378 JM |
4562 | |
4563 | ||
4564 | #ifdef CONFIG_FILS | |
4565 | ||
4566 | struct wpa_auth_fils_iter_data { | |
4567 | struct wpa_authenticator *auth; | |
4568 | const u8 *cache_id; | |
4569 | struct rsn_pmksa_cache_entry *pmksa; | |
4570 | const u8 *spa; | |
4571 | const u8 *pmkid; | |
4572 | }; | |
4573 | ||
4574 | ||
4575 | static int wpa_auth_fils_iter(struct wpa_authenticator *a, void *ctx) | |
4576 | { | |
4577 | struct wpa_auth_fils_iter_data *data = ctx; | |
4578 | ||
4cc6574d | 4579 | if (a == data->auth || !a->conf.fils_cache_id_set || |
7eace378 JM |
4580 | os_memcmp(a->conf.fils_cache_id, data->cache_id, |
4581 | FILS_CACHE_ID_LEN) != 0) | |
4582 | return 0; | |
4583 | data->pmksa = pmksa_cache_auth_get(a->pmksa, data->spa, data->pmkid); | |
4584 | return data->pmksa != NULL; | |
4585 | } | |
4586 | ||
4587 | ||
4588 | struct rsn_pmksa_cache_entry * | |
4589 | wpa_auth_pmksa_get_fils_cache_id(struct wpa_authenticator *wpa_auth, | |
4590 | const u8 *sta_addr, const u8 *pmkid) | |
4591 | { | |
4592 | struct wpa_auth_fils_iter_data idata; | |
4593 | ||
4594 | if (!wpa_auth->conf.fils_cache_id_set) | |
4595 | return NULL; | |
4596 | idata.auth = wpa_auth; | |
4597 | idata.cache_id = wpa_auth->conf.fils_cache_id; | |
4598 | idata.pmksa = NULL; | |
4599 | idata.spa = sta_addr; | |
4600 | idata.pmkid = pmkid; | |
4601 | wpa_auth_for_each_auth(wpa_auth, wpa_auth_fils_iter, &idata); | |
4602 | return idata.pmksa; | |
4603 | } | |
4604 | ||
5db997e3 JM |
4605 | |
4606 | #ifdef CONFIG_IEEE80211R_AP | |
a7968ea5 JM |
4607 | int wpa_auth_write_fte(struct wpa_authenticator *wpa_auth, int use_sha384, |
4608 | u8 *buf, size_t len) | |
5db997e3 JM |
4609 | { |
4610 | struct wpa_auth_config *conf = &wpa_auth->conf; | |
4611 | ||
a7968ea5 | 4612 | return wpa_write_ftie(conf, use_sha384, conf->r0_key_holder, |
5db997e3 JM |
4613 | conf->r0_key_holder_len, |
4614 | NULL, NULL, buf, len, NULL, 0); | |
4615 | } | |
4616 | #endif /* CONFIG_IEEE80211R_AP */ | |
4617 | ||
8acbf85f JM |
4618 | |
4619 | void wpa_auth_get_fils_aead_params(struct wpa_state_machine *sm, | |
4620 | u8 *fils_anonce, u8 *fils_snonce, | |
4621 | u8 *fils_kek, size_t *fils_kek_len) | |
4622 | { | |
4623 | os_memcpy(fils_anonce, sm->ANonce, WPA_NONCE_LEN); | |
4624 | os_memcpy(fils_snonce, sm->SNonce, WPA_NONCE_LEN); | |
4625 | os_memcpy(fils_kek, sm->PTK.kek, WPA_KEK_MAX_LEN); | |
4626 | *fils_kek_len = sm->PTK.kek_len; | |
4627 | } | |
4628 | ||
7eace378 | 4629 | #endif /* CONFIG_FILS */ |
6bc2f00f JM |
4630 | |
4631 | ||
82424732 | 4632 | #ifdef CONFIG_TESTING_OPTIONS |
d8afdb21 | 4633 | |
3d695328 JM |
4634 | int wpa_auth_resend_m1(struct wpa_state_machine *sm, int change_anonce, |
4635 | void (*cb)(void *ctx1, void *ctx2), | |
4636 | void *ctx1, void *ctx2) | |
d8afdb21 JM |
4637 | { |
4638 | const u8 *anonce = sm->ANonce; | |
4639 | u8 anonce_buf[WPA_NONCE_LEN]; | |
4640 | ||
4641 | if (change_anonce) { | |
4642 | if (random_get_bytes(anonce_buf, WPA_NONCE_LEN)) | |
4643 | return -1; | |
4644 | anonce = anonce_buf; | |
4645 | } | |
4646 | ||
4647 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
4648 | "sending 1/4 msg of 4-Way Handshake (TESTING)"); | |
4649 | wpa_send_eapol(sm->wpa_auth, sm, | |
4650 | WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL, | |
4651 | anonce, NULL, 0, 0, 0); | |
4652 | return 0; | |
4653 | } | |
4654 | ||
4655 | ||
3d695328 JM |
4656 | int wpa_auth_resend_m3(struct wpa_state_machine *sm, |
4657 | void (*cb)(void *ctx1, void *ctx2), | |
4658 | void *ctx1, void *ctx2) | |
d8afdb21 | 4659 | { |
0c3bc1be LD |
4660 | u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos; |
4661 | #ifdef CONFIG_IEEE80211W | |
4662 | u8 *opos; | |
4663 | #endif /* CONFIG_IEEE80211W */ | |
d8afdb21 JM |
4664 | size_t gtk_len, kde_len; |
4665 | struct wpa_group *gsm = sm->group; | |
4666 | u8 *wpa_ie; | |
4667 | int wpa_ie_len, secure, keyidx, encr = 0; | |
4668 | ||
4669 | /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE], | |
4670 | GTK[GN], IGTK, [FTIE], [TIE * 2]) | |
4671 | */ | |
4672 | ||
4673 | /* Use 0 RSC */ | |
4674 | os_memset(rsc, 0, WPA_KEY_RSC_LEN); | |
4675 | /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */ | |
4676 | wpa_ie = sm->wpa_auth->wpa_ie; | |
4677 | wpa_ie_len = sm->wpa_auth->wpa_ie_len; | |
4678 | if (sm->wpa == WPA_VERSION_WPA && | |
4679 | (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) && | |
4680 | wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) { | |
4681 | /* WPA-only STA, remove RSN IE and possible MDIE */ | |
4682 | wpa_ie = wpa_ie + wpa_ie[1] + 2; | |
4683 | if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN) | |
4684 | wpa_ie = wpa_ie + wpa_ie[1] + 2; | |
4685 | wpa_ie_len = wpa_ie[1] + 2; | |
4686 | } | |
4687 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
4688 | "sending 3/4 msg of 4-Way Handshake (TESTING)"); | |
4689 | if (sm->wpa == WPA_VERSION_WPA2) { | |
4690 | /* WPA2 send GTK in the 4-way handshake */ | |
4691 | secure = 1; | |
4692 | gtk = gsm->GTK[gsm->GN - 1]; | |
4693 | gtk_len = gsm->GTK_len; | |
4694 | keyidx = gsm->GN; | |
4695 | _rsc = rsc; | |
4696 | encr = 1; | |
4697 | } else { | |
4698 | /* WPA does not include GTK in msg 3/4 */ | |
4699 | secure = 0; | |
4700 | gtk = NULL; | |
4701 | gtk_len = 0; | |
4702 | keyidx = 0; | |
4703 | _rsc = NULL; | |
4704 | if (sm->rx_eapol_key_secure) { | |
4705 | /* | |
4706 | * It looks like Windows 7 supplicant tries to use | |
4707 | * Secure bit in msg 2/4 after having reported Michael | |
4708 | * MIC failure and it then rejects the 4-way handshake | |
4709 | * if msg 3/4 does not set Secure bit. Work around this | |
4710 | * by setting the Secure bit here even in the case of | |
4711 | * WPA if the supplicant used it first. | |
4712 | */ | |
4713 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
4714 | "STA used Secure bit in WPA msg 2/4 - " | |
4715 | "set Secure for 3/4 as workaround"); | |
4716 | secure = 1; | |
4717 | } | |
4718 | } | |
4719 | ||
17c2559c | 4720 | kde_len = wpa_ie_len + ieee80211w_kde_len(sm) + ocv_oci_len(sm); |
d8afdb21 JM |
4721 | if (gtk) |
4722 | kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len; | |
4723 | #ifdef CONFIG_IEEE80211R_AP | |
4724 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { | |
4725 | kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */ | |
4726 | kde_len += 300; /* FTIE + 2 * TIE */ | |
4727 | } | |
4728 | #endif /* CONFIG_IEEE80211R_AP */ | |
4729 | kde = os_malloc(kde_len); | |
4730 | if (kde == NULL) | |
4731 | return -1; | |
4732 | ||
4733 | pos = kde; | |
4734 | os_memcpy(pos, wpa_ie, wpa_ie_len); | |
4735 | pos += wpa_ie_len; | |
4736 | #ifdef CONFIG_IEEE80211R_AP | |
4737 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { | |
4738 | int res; | |
4739 | size_t elen; | |
4740 | ||
4741 | elen = pos - kde; | |
4742 | res = wpa_insert_pmkid(kde, &elen, sm->pmk_r1_name); | |
4743 | if (res < 0) { | |
4744 | wpa_printf(MSG_ERROR, "FT: Failed to insert " | |
4745 | "PMKR1Name into RSN IE in EAPOL-Key data"); | |
4746 | os_free(kde); | |
4747 | return -1; | |
4748 | } | |
4749 | pos -= wpa_ie_len; | |
4750 | pos += elen; | |
4751 | } | |
4752 | #endif /* CONFIG_IEEE80211R_AP */ | |
4753 | if (gtk) { | |
4754 | u8 hdr[2]; | |
4755 | hdr[0] = keyidx & 0x03; | |
4756 | hdr[1] = 0; | |
4757 | pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2, | |
4758 | gtk, gtk_len); | |
4759 | } | |
0c3bc1be | 4760 | #ifdef CONFIG_IEEE80211W |
d8afdb21 JM |
4761 | opos = pos; |
4762 | pos = ieee80211w_kde_add(sm, pos); | |
9f917339 MV |
4763 | if (pos - opos >= 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN) { |
4764 | /* skip KDE header and keyid */ | |
4765 | opos += 2 + RSN_SELECTOR_LEN + 2; | |
d8afdb21 JM |
4766 | os_memset(opos, 0, 6); /* clear PN */ |
4767 | } | |
0c3bc1be | 4768 | #endif /* CONFIG_IEEE80211W */ |
17c2559c MV |
4769 | if (ocv_oci_add(sm, &pos) < 0) { |
4770 | os_free(kde); | |
4771 | return -1; | |
4772 | } | |
d8afdb21 JM |
4773 | |
4774 | #ifdef CONFIG_IEEE80211R_AP | |
4775 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { | |
4776 | int res; | |
4777 | struct wpa_auth_config *conf; | |
4778 | ||
4779 | conf = &sm->wpa_auth->conf; | |
4780 | if (sm->assoc_resp_ftie && | |
4781 | kde + kde_len - pos >= 2 + sm->assoc_resp_ftie[1]) { | |
4782 | os_memcpy(pos, sm->assoc_resp_ftie, | |
4783 | 2 + sm->assoc_resp_ftie[1]); | |
4784 | res = 2 + sm->assoc_resp_ftie[1]; | |
4785 | } else { | |
a7968ea5 JM |
4786 | int use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt); |
4787 | ||
4788 | res = wpa_write_ftie(conf, use_sha384, | |
4789 | conf->r0_key_holder, | |
d8afdb21 JM |
4790 | conf->r0_key_holder_len, |
4791 | NULL, NULL, pos, | |
4792 | kde + kde_len - pos, | |
4793 | NULL, 0); | |
4794 | } | |
4795 | if (res < 0) { | |
4796 | wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE " | |
4797 | "into EAPOL-Key Key Data"); | |
4798 | os_free(kde); | |
4799 | return -1; | |
4800 | } | |
4801 | pos += res; | |
4802 | ||
4803 | /* TIE[ReassociationDeadline] (TU) */ | |
4804 | *pos++ = WLAN_EID_TIMEOUT_INTERVAL; | |
4805 | *pos++ = 5; | |
4806 | *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE; | |
4807 | WPA_PUT_LE32(pos, conf->reassociation_deadline); | |
4808 | pos += 4; | |
4809 | ||
4810 | /* TIE[KeyLifetime] (seconds) */ | |
4811 | *pos++ = WLAN_EID_TIMEOUT_INTERVAL; | |
4812 | *pos++ = 5; | |
4813 | *pos++ = WLAN_TIMEOUT_KEY_LIFETIME; | |
83fe4bd3 | 4814 | WPA_PUT_LE32(pos, conf->r0_key_lifetime); |
d8afdb21 JM |
4815 | pos += 4; |
4816 | } | |
4817 | #endif /* CONFIG_IEEE80211R_AP */ | |
4818 | ||
4819 | wpa_send_eapol(sm->wpa_auth, sm, | |
4820 | (secure ? WPA_KEY_INFO_SECURE : 0) | | |
4821 | (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ? | |
4822 | WPA_KEY_INFO_MIC : 0) | | |
4823 | WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL | | |
4824 | WPA_KEY_INFO_KEY_TYPE, | |
4825 | _rsc, sm->ANonce, kde, pos - kde, keyidx, encr); | |
4826 | os_free(kde); | |
4827 | return 0; | |
4828 | } | |
4829 | ||
4830 | ||
3d695328 JM |
4831 | int wpa_auth_resend_group_m1(struct wpa_state_machine *sm, |
4832 | void (*cb)(void *ctx1, void *ctx2), | |
4833 | void *ctx1, void *ctx2) | |
6bc2f00f JM |
4834 | { |
4835 | u8 rsc[WPA_KEY_RSC_LEN]; | |
4836 | struct wpa_group *gsm = sm->group; | |
4837 | const u8 *kde; | |
0c3bc1be LD |
4838 | u8 *kde_buf = NULL, *pos, hdr[2]; |
4839 | #ifdef CONFIG_IEEE80211W | |
4840 | u8 *opos; | |
4841 | #endif /* CONFIG_IEEE80211W */ | |
6bc2f00f JM |
4842 | size_t kde_len; |
4843 | u8 *gtk; | |
4844 | ||
4845 | /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */ | |
4846 | os_memset(rsc, 0, WPA_KEY_RSC_LEN); | |
4847 | /* Use 0 RSC */ | |
4848 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
4849 | "sending 1/2 msg of Group Key Handshake (TESTING)"); | |
4850 | ||
4851 | gtk = gsm->GTK[gsm->GN - 1]; | |
4852 | if (sm->wpa == WPA_VERSION_WPA2) { | |
4853 | kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len + | |
17c2559c | 4854 | ieee80211w_kde_len(sm) + ocv_oci_len(sm); |
6bc2f00f JM |
4855 | kde_buf = os_malloc(kde_len); |
4856 | if (kde_buf == NULL) | |
4857 | return -1; | |
4858 | ||
4859 | kde = pos = kde_buf; | |
4860 | hdr[0] = gsm->GN & 0x03; | |
4861 | hdr[1] = 0; | |
4862 | pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2, | |
4863 | gtk, gsm->GTK_len); | |
0c3bc1be | 4864 | #ifdef CONFIG_IEEE80211W |
6bc2f00f JM |
4865 | opos = pos; |
4866 | pos = ieee80211w_kde_add(sm, pos); | |
9f917339 MV |
4867 | if (pos - opos >= |
4868 | 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN) { | |
4869 | /* skip KDE header and keyid */ | |
4870 | opos += 2 + RSN_SELECTOR_LEN + 2; | |
6bc2f00f JM |
4871 | os_memset(opos, 0, 6); /* clear PN */ |
4872 | } | |
0c3bc1be | 4873 | #endif /* CONFIG_IEEE80211W */ |
17c2559c MV |
4874 | if (ocv_oci_add(sm, &pos) < 0) { |
4875 | os_free(kde_buf); | |
4876 | return -1; | |
4877 | } | |
6bc2f00f JM |
4878 | kde_len = pos - kde; |
4879 | } else { | |
4880 | kde = gtk; | |
4881 | kde_len = gsm->GTK_len; | |
4882 | } | |
4883 | ||
3d695328 JM |
4884 | sm->eapol_status_cb = cb; |
4885 | sm->eapol_status_cb_ctx1 = ctx1; | |
4886 | sm->eapol_status_cb_ctx2 = ctx2; | |
4887 | ||
6bc2f00f JM |
4888 | wpa_send_eapol(sm->wpa_auth, sm, |
4889 | WPA_KEY_INFO_SECURE | | |
4890 | (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ? | |
4891 | WPA_KEY_INFO_MIC : 0) | | |
4892 | WPA_KEY_INFO_ACK | | |
4893 | (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0), | |
4894 | rsc, NULL, kde, kde_len, gsm->GN, 1); | |
4895 | ||
4896 | os_free(kde_buf); | |
4897 | return 0; | |
4898 | } | |
d8afdb21 | 4899 | |
92662fb2 JB |
4900 | |
4901 | int wpa_auth_rekey_gtk(struct wpa_authenticator *wpa_auth) | |
4902 | { | |
4903 | if (!wpa_auth) | |
4904 | return -1; | |
4905 | eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL); | |
4906 | return eloop_register_timeout(0, 0, wpa_rekey_gtk, wpa_auth, NULL); | |
4907 | } | |
4908 | ||
6bc2f00f | 4909 | #endif /* CONFIG_TESTING_OPTIONS */ |