]>
Commit | Line | Data |
---|---|---|
6fc6879b | 1 | /* |
00338a4f | 2 | * IEEE 802.11 RSN / WPA Authenticator |
bb05d036 | 3 | * Copyright (c) 2004-2019, 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 | 58 | const u8 *pmk, unsigned int pmk_len, |
65a44e84 | 59 | struct wpa_ptk *ptk, int force_sha256); |
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); | |
16889aff | 66 | static int ieee80211w_kde_len(struct wpa_state_machine *sm); |
e73ffa09 | 67 | static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos); |
6fc6879b | 68 | |
bae61562 JM |
69 | static const u32 eapol_key_timeout_first = 100; /* ms */ |
70 | static const u32 eapol_key_timeout_subseq = 1000; /* ms */ | |
00338a4f | 71 | static const u32 eapol_key_timeout_first_group = 500; /* ms */ |
6f234c1e | 72 | static const u32 eapol_key_timeout_no_retrans = 4000; /* ms */ |
6fc6879b JM |
73 | |
74 | /* TODO: make these configurable */ | |
75 | static const int dot11RSNAConfigPMKLifetime = 43200; | |
76 | static const int dot11RSNAConfigPMKReauthThreshold = 70; | |
77 | static const int dot11RSNAConfigSATimeout = 60; | |
78 | ||
79 | ||
c772d054 | 80 | static inline int wpa_auth_mic_failure_report( |
6fc6879b JM |
81 | struct wpa_authenticator *wpa_auth, const u8 *addr) |
82 | { | |
cef8fac0 JB |
83 | if (wpa_auth->cb->mic_failure_report) |
84 | return wpa_auth->cb->mic_failure_report(wpa_auth->cb_ctx, addr); | |
c772d054 | 85 | return 0; |
6fc6879b JM |
86 | } |
87 | ||
88 | ||
2c502460 JM |
89 | static inline void wpa_auth_psk_failure_report( |
90 | struct wpa_authenticator *wpa_auth, const u8 *addr) | |
91 | { | |
cef8fac0 JB |
92 | if (wpa_auth->cb->psk_failure_report) |
93 | wpa_auth->cb->psk_failure_report(wpa_auth->cb_ctx, addr); | |
2c502460 JM |
94 | } |
95 | ||
96 | ||
6fc6879b JM |
97 | static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth, |
98 | const u8 *addr, wpa_eapol_variable var, | |
99 | int value) | |
100 | { | |
cef8fac0 JB |
101 | if (wpa_auth->cb->set_eapol) |
102 | wpa_auth->cb->set_eapol(wpa_auth->cb_ctx, addr, var, value); | |
6fc6879b JM |
103 | } |
104 | ||
105 | ||
106 | static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth, | |
107 | const u8 *addr, wpa_eapol_variable var) | |
108 | { | |
9385f03f | 109 | if (!wpa_auth->cb->get_eapol) |
6fc6879b | 110 | return -1; |
cef8fac0 | 111 | return wpa_auth->cb->get_eapol(wpa_auth->cb_ctx, addr, var); |
6fc6879b JM |
112 | } |
113 | ||
114 | ||
115 | static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth, | |
759fd76b JM |
116 | const u8 *addr, |
117 | const u8 *p2p_dev_addr, | |
dbfa691d JM |
118 | const u8 *prev_psk, size_t *psk_len, |
119 | int *vlan_id) | |
6fc6879b | 120 | { |
9385f03f | 121 | if (!wpa_auth->cb->get_psk) |
6fc6879b | 122 | return NULL; |
cef8fac0 | 123 | return wpa_auth->cb->get_psk(wpa_auth->cb_ctx, addr, p2p_dev_addr, |
dbfa691d | 124 | prev_psk, psk_len, vlan_id); |
6fc6879b JM |
125 | } |
126 | ||
127 | ||
128 | static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth, | |
129 | const u8 *addr, u8 *msk, size_t *len) | |
130 | { | |
9385f03f | 131 | if (!wpa_auth->cb->get_msk) |
6fc6879b | 132 | return -1; |
cef8fac0 | 133 | return wpa_auth->cb->get_msk(wpa_auth->cb_ctx, addr, msk, len); |
6fc6879b JM |
134 | } |
135 | ||
136 | ||
137 | static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth, | |
138 | int vlan_id, | |
71934751 | 139 | enum wpa_alg alg, const u8 *addr, int idx, |
a919a260 AW |
140 | u8 *key, size_t key_len, |
141 | enum key_flag key_flag) | |
6fc6879b | 142 | { |
9385f03f | 143 | if (!wpa_auth->cb->set_key) |
6fc6879b | 144 | return -1; |
cef8fac0 | 145 | return wpa_auth->cb->set_key(wpa_auth->cb_ctx, vlan_id, alg, addr, idx, |
a919a260 | 146 | key, key_len, key_flag); |
6fc6879b JM |
147 | } |
148 | ||
149 | ||
150 | static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth, | |
151 | const u8 *addr, int idx, u8 *seq) | |
152 | { | |
8d84c75f JM |
153 | int res; |
154 | ||
9385f03f | 155 | if (!wpa_auth->cb->get_seqnum) |
6fc6879b | 156 | return -1; |
8d84c75f JM |
157 | res = wpa_auth->cb->get_seqnum(wpa_auth->cb_ctx, addr, idx, seq); |
158 | #ifdef CONFIG_TESTING_OPTIONS | |
159 | if (!addr && idx < 4 && wpa_auth->conf.gtk_rsc_override_set) { | |
160 | wpa_printf(MSG_DEBUG, | |
161 | "TESTING: Override GTK RSC %016llx --> %016llx", | |
162 | (long long unsigned) WPA_GET_LE64(seq), | |
163 | (long long unsigned) | |
164 | WPA_GET_LE64(wpa_auth->conf.gtk_rsc_override)); | |
165 | os_memcpy(seq, wpa_auth->conf.gtk_rsc_override, | |
166 | WPA_KEY_RSC_LEN); | |
167 | } | |
168 | if (!addr && idx >= 4 && idx <= 5 && | |
169 | wpa_auth->conf.igtk_rsc_override_set) { | |
170 | wpa_printf(MSG_DEBUG, | |
171 | "TESTING: Override IGTK RSC %016llx --> %016llx", | |
172 | (long long unsigned) WPA_GET_LE64(seq), | |
173 | (long long unsigned) | |
174 | WPA_GET_LE64(wpa_auth->conf.igtk_rsc_override)); | |
175 | os_memcpy(seq, wpa_auth->conf.igtk_rsc_override, | |
176 | WPA_KEY_RSC_LEN); | |
177 | } | |
178 | #endif /* CONFIG_TESTING_OPTIONS */ | |
179 | return res; | |
6fc6879b JM |
180 | } |
181 | ||
182 | ||
6fc6879b JM |
183 | static inline int |
184 | wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr, | |
185 | const u8 *data, size_t data_len, int encrypt) | |
186 | { | |
9385f03f | 187 | if (!wpa_auth->cb->send_eapol) |
6fc6879b | 188 | return -1; |
cef8fac0 JB |
189 | return wpa_auth->cb->send_eapol(wpa_auth->cb_ctx, addr, data, data_len, |
190 | encrypt); | |
6fc6879b JM |
191 | } |
192 | ||
193 | ||
c50d94f1 BC |
194 | #ifdef CONFIG_MESH |
195 | static inline int wpa_auth_start_ampe(struct wpa_authenticator *wpa_auth, | |
196 | const u8 *addr) | |
197 | { | |
9385f03f | 198 | if (!wpa_auth->cb->start_ampe) |
c50d94f1 | 199 | return -1; |
cef8fac0 | 200 | return wpa_auth->cb->start_ampe(wpa_auth->cb_ctx, addr); |
c50d94f1 BC |
201 | } |
202 | #endif /* CONFIG_MESH */ | |
203 | ||
204 | ||
6fc6879b JM |
205 | int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth, |
206 | int (*cb)(struct wpa_state_machine *sm, void *ctx), | |
207 | void *cb_ctx) | |
208 | { | |
9385f03f | 209 | if (!wpa_auth->cb->for_each_sta) |
6fc6879b | 210 | return 0; |
cef8fac0 | 211 | return wpa_auth->cb->for_each_sta(wpa_auth->cb_ctx, cb, cb_ctx); |
6fc6879b JM |
212 | } |
213 | ||
214 | ||
bf98f7f3 JM |
215 | int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth, |
216 | int (*cb)(struct wpa_authenticator *a, void *ctx), | |
217 | void *cb_ctx) | |
218 | { | |
9385f03f | 219 | if (!wpa_auth->cb->for_each_auth) |
bf98f7f3 | 220 | return 0; |
cef8fac0 | 221 | return wpa_auth->cb->for_each_auth(wpa_auth->cb_ctx, cb, cb_ctx); |
bf98f7f3 JM |
222 | } |
223 | ||
224 | ||
6fc6879b JM |
225 | void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr, |
226 | logger_level level, const char *txt) | |
227 | { | |
9385f03f | 228 | if (!wpa_auth->cb->logger) |
6fc6879b | 229 | return; |
cef8fac0 | 230 | wpa_auth->cb->logger(wpa_auth->cb_ctx, addr, level, txt); |
6fc6879b JM |
231 | } |
232 | ||
233 | ||
234 | void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr, | |
235 | logger_level level, const char *fmt, ...) | |
236 | { | |
237 | char *format; | |
238 | int maxlen; | |
239 | va_list ap; | |
240 | ||
9385f03f | 241 | if (!wpa_auth->cb->logger) |
6fc6879b JM |
242 | return; |
243 | ||
244 | maxlen = os_strlen(fmt) + 100; | |
245 | format = os_malloc(maxlen); | |
246 | if (!format) | |
247 | return; | |
248 | ||
249 | va_start(ap, fmt); | |
250 | vsnprintf(format, maxlen, fmt, ap); | |
251 | va_end(ap); | |
252 | ||
253 | wpa_auth_logger(wpa_auth, addr, level, format); | |
254 | ||
255 | os_free(format); | |
256 | } | |
257 | ||
258 | ||
259 | static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth, | |
567da5bb | 260 | const u8 *addr, u16 reason) |
6fc6879b | 261 | { |
9385f03f | 262 | if (!wpa_auth->cb->disconnect) |
6fc6879b | 263 | return; |
567da5bb JM |
264 | wpa_printf(MSG_DEBUG, "wpa_sta_disconnect STA " MACSTR " (reason %u)", |
265 | MAC2STR(addr), reason); | |
266 | wpa_auth->cb->disconnect(wpa_auth->cb_ctx, addr, reason); | |
6fc6879b JM |
267 | } |
268 | ||
269 | ||
17c2559c MV |
270 | #ifdef CONFIG_OCV |
271 | static int wpa_channel_info(struct wpa_authenticator *wpa_auth, | |
272 | struct wpa_channel_info *ci) | |
273 | { | |
274 | if (!wpa_auth->cb->channel_info) | |
275 | return -1; | |
276 | return wpa_auth->cb->channel_info(wpa_auth->cb_ctx, ci); | |
277 | } | |
278 | #endif /* CONFIG_OCV */ | |
279 | ||
280 | ||
dbfa691d JM |
281 | static int wpa_auth_update_vlan(struct wpa_authenticator *wpa_auth, |
282 | const u8 *addr, int vlan_id) | |
283 | { | |
284 | if (!wpa_auth->cb->update_vlan) | |
285 | return -1; | |
286 | return wpa_auth->cb->update_vlan(wpa_auth->cb_ctx, addr, vlan_id); | |
287 | } | |
288 | ||
289 | ||
6fc6879b JM |
290 | static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx) |
291 | { | |
292 | struct wpa_authenticator *wpa_auth = eloop_ctx; | |
293 | ||
3642c431 | 294 | if (random_get_bytes(wpa_auth->group->GMK, WPA_GMK_LEN)) { |
f83d3491 JM |
295 | wpa_printf(MSG_ERROR, |
296 | "Failed to get random data for WPA initialization."); | |
6fc6879b JM |
297 | } else { |
298 | wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd"); | |
5cb9d5c3 JM |
299 | wpa_hexdump_key(MSG_DEBUG, "GMK", |
300 | wpa_auth->group->GMK, WPA_GMK_LEN); | |
6fc6879b JM |
301 | } |
302 | ||
303 | if (wpa_auth->conf.wpa_gmk_rekey) { | |
304 | eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0, | |
305 | wpa_rekey_gmk, wpa_auth, NULL); | |
306 | } | |
307 | } | |
308 | ||
309 | ||
310 | static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx) | |
311 | { | |
312 | struct wpa_authenticator *wpa_auth = eloop_ctx; | |
a0ad9e8c | 313 | struct wpa_group *group, *next; |
6fc6879b JM |
314 | |
315 | wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK"); | |
a0ad9e8c MB |
316 | group = wpa_auth->group; |
317 | while (group) { | |
318 | wpa_group_get(wpa_auth, group); | |
319 | ||
6fc6879b JM |
320 | group->GTKReKey = TRUE; |
321 | do { | |
322 | group->changed = FALSE; | |
323 | wpa_group_sm_step(wpa_auth, group); | |
324 | } while (group->changed); | |
a0ad9e8c MB |
325 | |
326 | next = group->next; | |
327 | wpa_group_put(wpa_auth, group); | |
328 | group = next; | |
6fc6879b JM |
329 | } |
330 | ||
331 | if (wpa_auth->conf.wpa_group_rekey) { | |
332 | eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, | |
333 | 0, wpa_rekey_gtk, wpa_auth, NULL); | |
334 | } | |
335 | } | |
336 | ||
337 | ||
581a8cde JM |
338 | static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx) |
339 | { | |
340 | struct wpa_authenticator *wpa_auth = eloop_ctx; | |
341 | struct wpa_state_machine *sm = timeout_ctx; | |
342 | ||
343 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK"); | |
344 | wpa_request_new_ptk(sm); | |
345 | wpa_sm_step(sm); | |
346 | } | |
347 | ||
348 | ||
a40bd06e JM |
349 | void wpa_auth_set_ptk_rekey_timer(struct wpa_state_machine *sm) |
350 | { | |
351 | if (sm && sm->wpa_auth->conf.wpa_ptk_rekey) { | |
352 | wpa_printf(MSG_DEBUG, "WPA: Start PTK rekeying timer for " | |
353 | MACSTR " (%d seconds)", MAC2STR(sm->addr), | |
354 | sm->wpa_auth->conf.wpa_ptk_rekey); | |
355 | eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm); | |
356 | eloop_register_timeout(sm->wpa_auth->conf.wpa_ptk_rekey, 0, | |
357 | wpa_rekey_ptk, sm->wpa_auth, sm); | |
358 | } | |
359 | } | |
360 | ||
361 | ||
6fc6879b JM |
362 | static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx) |
363 | { | |
364 | if (sm->pmksa == ctx) | |
365 | sm->pmksa = NULL; | |
366 | return 0; | |
367 | } | |
368 | ||
369 | ||
370 | static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry, | |
371 | void *ctx) | |
372 | { | |
373 | struct wpa_authenticator *wpa_auth = ctx; | |
374 | wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry); | |
375 | } | |
376 | ||
377 | ||
1bdb7ab3 JM |
378 | static int wpa_group_init_gmk_and_counter(struct wpa_authenticator *wpa_auth, |
379 | struct wpa_group *group) | |
380 | { | |
559cdabb | 381 | u8 buf[ETH_ALEN + 8 + sizeof(unsigned long)]; |
1bdb7ab3 | 382 | u8 rkey[32]; |
559cdabb | 383 | unsigned long ptr; |
1bdb7ab3 | 384 | |
3642c431 | 385 | if (random_get_bytes(group->GMK, WPA_GMK_LEN) < 0) |
1bdb7ab3 JM |
386 | return -1; |
387 | wpa_hexdump_key(MSG_DEBUG, "GMK", group->GMK, WPA_GMK_LEN); | |
388 | ||
389 | /* | |
390 | * Counter = PRF-256(Random number, "Init Counter", | |
391 | * Local MAC Address || Time) | |
392 | */ | |
393 | os_memcpy(buf, wpa_auth->addr, ETH_ALEN); | |
394 | wpa_get_ntp_timestamp(buf + ETH_ALEN); | |
559cdabb JM |
395 | ptr = (unsigned long) group; |
396 | os_memcpy(buf + ETH_ALEN + 8, &ptr, sizeof(ptr)); | |
525923b1 JM |
397 | #ifdef TEST_FUZZ |
398 | os_memset(buf + ETH_ALEN, 0xab, 8); | |
399 | os_memset(buf + ETH_ALEN + 8, 0xcd, sizeof(ptr)); | |
400 | #endif /* TEST_FUZZ */ | |
3642c431 | 401 | if (random_get_bytes(rkey, sizeof(rkey)) < 0) |
1bdb7ab3 JM |
402 | return -1; |
403 | ||
404 | if (sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf), | |
405 | group->Counter, WPA_NONCE_LEN) < 0) | |
406 | return -1; | |
407 | wpa_hexdump_key(MSG_DEBUG, "Key Counter", | |
408 | group->Counter, WPA_NONCE_LEN); | |
409 | ||
410 | return 0; | |
411 | } | |
412 | ||
413 | ||
e6965d4e | 414 | static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth, |
bdffdc5d | 415 | int vlan_id, int delay_init) |
e6965d4e JM |
416 | { |
417 | struct wpa_group *group; | |
e6965d4e JM |
418 | |
419 | group = os_zalloc(sizeof(struct wpa_group)); | |
9385f03f | 420 | if (!group) |
e6965d4e JM |
421 | return NULL; |
422 | ||
423 | group->GTKAuthenticator = TRUE; | |
424 | group->vlan_id = vlan_id; | |
c3550295 | 425 | group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group); |
6fc6879b | 426 | |
08704cd8 | 427 | if (random_pool_ready() != 1) { |
f83d3491 JM |
428 | wpa_printf(MSG_INFO, |
429 | "WPA: Not enough entropy in random pool for secure operations - update keys later when the first station connects"); | |
08704cd8 JM |
430 | } |
431 | ||
1bdb7ab3 JM |
432 | /* |
433 | * Set initial GMK/Counter value here. The actual values that will be | |
434 | * used in negotiations will be set once the first station tries to | |
435 | * connect. This allows more time for collecting additional randomness | |
436 | * on embedded devices. | |
6fc6879b | 437 | */ |
1bdb7ab3 | 438 | if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0) { |
f83d3491 JM |
439 | wpa_printf(MSG_ERROR, |
440 | "Failed to get random data for WPA initialization."); | |
6fc6879b JM |
441 | os_free(group); |
442 | return NULL; | |
443 | } | |
6fc6879b JM |
444 | |
445 | group->GInit = TRUE; | |
bdffdc5d | 446 | if (delay_init) { |
f83d3491 JM |
447 | wpa_printf(MSG_DEBUG, |
448 | "WPA: Delay group state machine start until Beacon frames have been configured"); | |
bdffdc5d JM |
449 | /* Initialization is completed in wpa_init_keys(). */ |
450 | } else { | |
451 | wpa_group_sm_step(wpa_auth, group); | |
452 | group->GInit = FALSE; | |
453 | wpa_group_sm_step(wpa_auth, group); | |
454 | } | |
6fc6879b JM |
455 | |
456 | return group; | |
457 | } | |
458 | ||
459 | ||
460 | /** | |
461 | * wpa_init - Initialize WPA authenticator | |
462 | * @addr: Authenticator address | |
463 | * @conf: Configuration for WPA authenticator | |
a17df5fb | 464 | * @cb: Callback functions for WPA authenticator |
6fc6879b JM |
465 | * Returns: Pointer to WPA authenticator data or %NULL on failure |
466 | */ | |
467 | struct wpa_authenticator * wpa_init(const u8 *addr, | |
468 | struct wpa_auth_config *conf, | |
cef8fac0 JB |
469 | const struct wpa_auth_callbacks *cb, |
470 | void *cb_ctx) | |
6fc6879b JM |
471 | { |
472 | struct wpa_authenticator *wpa_auth; | |
473 | ||
474 | wpa_auth = os_zalloc(sizeof(struct wpa_authenticator)); | |
9385f03f | 475 | if (!wpa_auth) |
6fc6879b JM |
476 | return NULL; |
477 | os_memcpy(wpa_auth->addr, addr, ETH_ALEN); | |
478 | os_memcpy(&wpa_auth->conf, conf, sizeof(*conf)); | |
cef8fac0 JB |
479 | wpa_auth->cb = cb; |
480 | wpa_auth->cb_ctx = cb_ctx; | |
6fc6879b JM |
481 | |
482 | if (wpa_auth_gen_wpa_ie(wpa_auth)) { | |
483 | wpa_printf(MSG_ERROR, "Could not generate WPA IE."); | |
484 | os_free(wpa_auth); | |
485 | return NULL; | |
486 | } | |
487 | ||
bdffdc5d | 488 | wpa_auth->group = wpa_group_init(wpa_auth, 0, 1); |
9385f03f | 489 | if (!wpa_auth->group) { |
6fc6879b JM |
490 | os_free(wpa_auth->wpa_ie); |
491 | os_free(wpa_auth); | |
492 | return NULL; | |
493 | } | |
494 | ||
4bb081f1 JM |
495 | wpa_auth->pmksa = pmksa_cache_auth_init(wpa_auth_pmksa_free_cb, |
496 | wpa_auth); | |
9385f03f | 497 | if (!wpa_auth->pmksa) { |
6fc6879b | 498 | wpa_printf(MSG_ERROR, "PMKSA cache initialization failed."); |
27d9701d | 499 | os_free(wpa_auth->group); |
6fc6879b JM |
500 | os_free(wpa_auth->wpa_ie); |
501 | os_free(wpa_auth); | |
502 | return NULL; | |
503 | } | |
504 | ||
4ec1fd8e | 505 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b | 506 | wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init(); |
9385f03f | 507 | if (!wpa_auth->ft_pmk_cache) { |
6fc6879b | 508 | wpa_printf(MSG_ERROR, "FT PMK cache initialization failed."); |
27d9701d | 509 | os_free(wpa_auth->group); |
6fc6879b | 510 | os_free(wpa_auth->wpa_ie); |
4bb081f1 | 511 | pmksa_cache_auth_deinit(wpa_auth->pmksa); |
6fc6879b JM |
512 | os_free(wpa_auth); |
513 | return NULL; | |
514 | } | |
4ec1fd8e | 515 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b JM |
516 | |
517 | if (wpa_auth->conf.wpa_gmk_rekey) { | |
518 | eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0, | |
519 | wpa_rekey_gmk, wpa_auth, NULL); | |
520 | } | |
521 | ||
522 | if (wpa_auth->conf.wpa_group_rekey) { | |
523 | eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0, | |
524 | wpa_rekey_gtk, wpa_auth, NULL); | |
525 | } | |
526 | ||
25ef8529 JM |
527 | #ifdef CONFIG_P2P |
528 | if (WPA_GET_BE32(conf->ip_addr_start)) { | |
529 | int count = WPA_GET_BE32(conf->ip_addr_end) - | |
530 | WPA_GET_BE32(conf->ip_addr_start) + 1; | |
531 | if (count > 1000) | |
532 | count = 1000; | |
533 | if (count > 0) | |
534 | wpa_auth->ip_pool = bitfield_alloc(count); | |
535 | } | |
536 | #endif /* CONFIG_P2P */ | |
537 | ||
6fc6879b JM |
538 | return wpa_auth; |
539 | } | |
540 | ||
541 | ||
bdffdc5d JM |
542 | int wpa_init_keys(struct wpa_authenticator *wpa_auth) |
543 | { | |
544 | struct wpa_group *group = wpa_auth->group; | |
545 | ||
f83d3491 JM |
546 | wpa_printf(MSG_DEBUG, |
547 | "WPA: Start group state machine to set initial keys"); | |
bdffdc5d JM |
548 | wpa_group_sm_step(wpa_auth, group); |
549 | group->GInit = FALSE; | |
550 | wpa_group_sm_step(wpa_auth, group); | |
7d7f7be2 JM |
551 | if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) |
552 | return -1; | |
bdffdc5d JM |
553 | return 0; |
554 | } | |
555 | ||
556 | ||
6fc6879b JM |
557 | /** |
558 | * wpa_deinit - Deinitialize WPA authenticator | |
559 | * @wpa_auth: Pointer to WPA authenticator data from wpa_init() | |
560 | */ | |
561 | void wpa_deinit(struct wpa_authenticator *wpa_auth) | |
562 | { | |
563 | struct wpa_group *group, *prev; | |
564 | ||
565 | eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL); | |
566 | eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL); | |
567 | ||
4bb081f1 | 568 | pmksa_cache_auth_deinit(wpa_auth->pmksa); |
6fc6879b | 569 | |
4ec1fd8e | 570 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b JM |
571 | wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache); |
572 | wpa_auth->ft_pmk_cache = NULL; | |
eefe8630 | 573 | wpa_ft_deinit(wpa_auth); |
4ec1fd8e | 574 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b | 575 | |
25ef8529 JM |
576 | #ifdef CONFIG_P2P |
577 | bitfield_free(wpa_auth->ip_pool); | |
578 | #endif /* CONFIG_P2P */ | |
579 | ||
580 | ||
6fc6879b JM |
581 | os_free(wpa_auth->wpa_ie); |
582 | ||
583 | group = wpa_auth->group; | |
584 | while (group) { | |
585 | prev = group; | |
586 | group = group->next; | |
587 | os_free(prev); | |
588 | } | |
589 | ||
590 | os_free(wpa_auth); | |
591 | } | |
592 | ||
593 | ||
594 | /** | |
595 | * wpa_reconfig - Update WPA authenticator configuration | |
596 | * @wpa_auth: Pointer to WPA authenticator data from wpa_init() | |
597 | * @conf: Configuration for WPA authenticator | |
598 | */ | |
599 | int wpa_reconfig(struct wpa_authenticator *wpa_auth, | |
600 | struct wpa_auth_config *conf) | |
601 | { | |
e6965d4e | 602 | struct wpa_group *group; |
9385f03f JM |
603 | |
604 | if (!wpa_auth) | |
6fc6879b JM |
605 | return 0; |
606 | ||
607 | os_memcpy(&wpa_auth->conf, conf, sizeof(*conf)); | |
ad08c363 JM |
608 | if (wpa_auth_gen_wpa_ie(wpa_auth)) { |
609 | wpa_printf(MSG_ERROR, "Could not generate WPA IE."); | |
610 | return -1; | |
611 | } | |
612 | ||
e6965d4e JM |
613 | /* |
614 | * Reinitialize GTK to make sure it is suitable for the new | |
615 | * configuration. | |
616 | */ | |
617 | group = wpa_auth->group; | |
c3550295 | 618 | group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group); |
e6965d4e JM |
619 | group->GInit = TRUE; |
620 | wpa_group_sm_step(wpa_auth, group); | |
621 | group->GInit = FALSE; | |
622 | wpa_group_sm_step(wpa_auth, group); | |
623 | ||
6fc6879b JM |
624 | return 0; |
625 | } | |
626 | ||
627 | ||
628 | struct wpa_state_machine * | |
94ddef3e JM |
629 | wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr, |
630 | const u8 *p2p_dev_addr) | |
6fc6879b JM |
631 | { |
632 | struct wpa_state_machine *sm; | |
633 | ||
7d7f7be2 JM |
634 | if (wpa_auth->group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) |
635 | return NULL; | |
636 | ||
6fc6879b | 637 | sm = os_zalloc(sizeof(struct wpa_state_machine)); |
9385f03f | 638 | if (!sm) |
6fc6879b JM |
639 | return NULL; |
640 | os_memcpy(sm->addr, addr, ETH_ALEN); | |
94ddef3e JM |
641 | if (p2p_dev_addr) |
642 | os_memcpy(sm->p2p_dev_addr, p2p_dev_addr, ETH_ALEN); | |
6fc6879b JM |
643 | |
644 | sm->wpa_auth = wpa_auth; | |
645 | sm->group = wpa_auth->group; | |
a0ad9e8c | 646 | wpa_group_get(sm->wpa_auth, sm->group); |
6fc6879b JM |
647 | |
648 | return sm; | |
649 | } | |
650 | ||
651 | ||
6f9b5d16 JM |
652 | int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth, |
653 | struct wpa_state_machine *sm) | |
6fc6879b | 654 | { |
9385f03f | 655 | if (!wpa_auth || !wpa_auth->conf.wpa || !sm) |
6f9b5d16 | 656 | return -1; |
6fc6879b | 657 | |
4ec1fd8e | 658 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b JM |
659 | if (sm->ft_completed) { |
660 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
f83d3491 | 661 | "FT authentication already completed - do not start 4-way handshake"); |
3d4d2348 JM |
662 | /* Go to PTKINITDONE state to allow GTK rekeying */ |
663 | sm->wpa_ptk_state = WPA_PTK_PTKINITDONE; | |
3bbc4705 | 664 | sm->Pair = TRUE; |
6f9b5d16 | 665 | return 0; |
6fc6879b | 666 | } |
4ec1fd8e | 667 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b | 668 | |
07e0117d JM |
669 | #ifdef CONFIG_FILS |
670 | if (sm->fils_completed) { | |
671 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
672 | "FILS authentication already completed - do not start 4-way handshake"); | |
673 | /* Go to PTKINITDONE state to allow GTK rekeying */ | |
674 | sm->wpa_ptk_state = WPA_PTK_PTKINITDONE; | |
3bbc4705 | 675 | sm->Pair = TRUE; |
07e0117d JM |
676 | return 0; |
677 | } | |
678 | #endif /* CONFIG_FILS */ | |
679 | ||
6fc6879b | 680 | if (sm->started) { |
22a299ee | 681 | os_memset(&sm->key_replay, 0, sizeof(sm->key_replay)); |
6fc6879b | 682 | sm->ReAuthenticationRequest = TRUE; |
6f9b5d16 | 683 | return wpa_sm_step(sm); |
6fc6879b JM |
684 | } |
685 | ||
686 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
687 | "start authentication"); | |
688 | sm->started = 1; | |
689 | ||
690 | sm->Init = TRUE; | |
e4a6ea1d | 691 | if (wpa_sm_step(sm) == 1) |
6f9b5d16 | 692 | return 1; /* should not really happen */ |
6fc6879b JM |
693 | sm->Init = FALSE; |
694 | sm->AuthenticationRequest = TRUE; | |
6f9b5d16 | 695 | return wpa_sm_step(sm); |
6fc6879b JM |
696 | } |
697 | ||
698 | ||
a8d05fca JM |
699 | void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm) |
700 | { | |
701 | /* WPA/RSN was not used - clear WPA state. This is needed if the STA | |
702 | * reassociates back to the same AP while the previous entry for the | |
703 | * STA has not yet been removed. */ | |
9385f03f | 704 | if (!sm) |
a8d05fca JM |
705 | return; |
706 | ||
707 | sm->wpa_key_mgmt = 0; | |
708 | } | |
709 | ||
710 | ||
6fc6879b JM |
711 | static void wpa_free_sta_sm(struct wpa_state_machine *sm) |
712 | { | |
25ef8529 JM |
713 | #ifdef CONFIG_P2P |
714 | if (WPA_GET_BE32(sm->ip_addr)) { | |
715 | u32 start; | |
f83d3491 JM |
716 | wpa_printf(MSG_DEBUG, |
717 | "P2P: Free assigned IP address %u.%u.%u.%u from " | |
718 | MACSTR, | |
25ef8529 JM |
719 | sm->ip_addr[0], sm->ip_addr[1], |
720 | sm->ip_addr[2], sm->ip_addr[3], | |
721 | MAC2STR(sm->addr)); | |
722 | start = WPA_GET_BE32(sm->wpa_auth->conf.ip_addr_start); | |
723 | bitfield_clear(sm->wpa_auth->ip_pool, | |
724 | WPA_GET_BE32(sm->ip_addr) - start); | |
725 | } | |
726 | #endif /* CONFIG_P2P */ | |
2ade8ef2 JM |
727 | if (sm->GUpdateStationKeys) { |
728 | sm->group->GKeyDoneStations--; | |
729 | sm->GUpdateStationKeys = FALSE; | |
730 | } | |
4ec1fd8e | 731 | #ifdef CONFIG_IEEE80211R_AP |
0f857f43 | 732 | os_free(sm->assoc_resp_ftie); |
692ec305 | 733 | wpabuf_free(sm->ft_pending_req_ies); |
4ec1fd8e | 734 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b JM |
735 | os_free(sm->last_rx_eapol_key); |
736 | os_free(sm->wpa_ie); | |
d3516cad | 737 | os_free(sm->rsnxe); |
a0ad9e8c | 738 | wpa_group_put(sm->wpa_auth, sm->group); |
10ec6a5f JM |
739 | #ifdef CONFIG_DPP2 |
740 | wpabuf_clear_free(sm->dpp_z); | |
741 | #endif /* CONFIG_DPP2 */ | |
09ab81b9 | 742 | bin_clear_free(sm, sizeof(*sm)); |
6fc6879b JM |
743 | } |
744 | ||
745 | ||
746 | void wpa_auth_sta_deinit(struct wpa_state_machine *sm) | |
747 | { | |
62e12afc JM |
748 | struct wpa_authenticator *wpa_auth; |
749 | ||
9385f03f | 750 | if (!sm) |
6fc6879b JM |
751 | return; |
752 | ||
62e12afc JM |
753 | wpa_auth = sm->wpa_auth; |
754 | if (wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) { | |
755 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
f83d3491 | 756 | "strict rekeying - force GTK rekey since STA is leaving"); |
3f5a1860 | 757 | if (eloop_deplete_timeout(0, 500000, wpa_rekey_gtk, |
62e12afc JM |
758 | wpa_auth, NULL) == -1) |
759 | eloop_register_timeout(0, 500000, wpa_rekey_gtk, | |
760 | wpa_auth, NULL); | |
6fc6879b JM |
761 | } |
762 | ||
62e12afc | 763 | eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm); |
e4bf4db9 | 764 | sm->pending_1_of_4_timeout = 0; |
6fc6879b | 765 | eloop_cancel_timeout(wpa_sm_call_step, sm, NULL); |
62e12afc | 766 | eloop_cancel_timeout(wpa_rekey_ptk, wpa_auth, sm); |
3a46cf93 MB |
767 | #ifdef CONFIG_IEEE80211R_AP |
768 | wpa_ft_sta_deinit(sm); | |
769 | #endif /* CONFIG_IEEE80211R_AP */ | |
6fc6879b JM |
770 | if (sm->in_step_loop) { |
771 | /* Must not free state machine while wpa_sm_step() is running. | |
772 | * Freeing will be completed in the end of wpa_sm_step(). */ | |
f83d3491 JM |
773 | wpa_printf(MSG_DEBUG, |
774 | "WPA: Registering pending STA state machine deinit for " | |
775 | MACSTR, MAC2STR(sm->addr)); | |
6fc6879b JM |
776 | sm->pending_deinit = 1; |
777 | } else | |
778 | wpa_free_sta_sm(sm); | |
779 | } | |
780 | ||
781 | ||
782 | static void wpa_request_new_ptk(struct wpa_state_machine *sm) | |
783 | { | |
9385f03f | 784 | if (!sm) |
6fc6879b JM |
785 | return; |
786 | ||
862aac1f | 787 | if (!sm->use_ext_key_id && sm->wpa_auth->conf.wpa_deny_ptk0_rekey) { |
1a7963e3 AW |
788 | wpa_printf(MSG_INFO, |
789 | "WPA: PTK0 rekey not allowed, disconnect " MACSTR, | |
790 | MAC2STR(sm->addr)); | |
791 | sm->Disconnect = TRUE; | |
792 | /* Try to encourage the STA to reconnect */ | |
793 | sm->disconnect_reason = | |
794 | WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA; | |
795 | } else { | |
862aac1f AW |
796 | if (sm->use_ext_key_id) |
797 | sm->keyidx_active ^= 1; /* flip Key ID */ | |
1a7963e3 AW |
798 | sm->PTKRequest = TRUE; |
799 | sm->PTK_valid = 0; | |
800 | } | |
6fc6879b JM |
801 | } |
802 | ||
803 | ||
68921e24 | 804 | static int wpa_replay_counter_valid(struct wpa_key_replay_counter *ctr, |
22a299ee JM |
805 | const u8 *replay_counter) |
806 | { | |
807 | int i; | |
808 | for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) { | |
68921e24 | 809 | if (!ctr[i].valid) |
22a299ee | 810 | break; |
68921e24 | 811 | if (os_memcmp(replay_counter, ctr[i].counter, |
22a299ee JM |
812 | WPA_REPLAY_COUNTER_LEN) == 0) |
813 | return 1; | |
814 | } | |
815 | return 0; | |
816 | } | |
817 | ||
818 | ||
68921e24 JM |
819 | static void wpa_replay_counter_mark_invalid(struct wpa_key_replay_counter *ctr, |
820 | const u8 *replay_counter) | |
821 | { | |
822 | int i; | |
823 | for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) { | |
824 | if (ctr[i].valid && | |
9385f03f | 825 | (!replay_counter || |
68921e24 JM |
826 | os_memcmp(replay_counter, ctr[i].counter, |
827 | WPA_REPLAY_COUNTER_LEN) == 0)) | |
828 | ctr[i].valid = FALSE; | |
829 | } | |
830 | } | |
831 | ||
832 | ||
4ec1fd8e | 833 | #ifdef CONFIG_IEEE80211R_AP |
0f857f43 JM |
834 | static int ft_check_msg_2_of_4(struct wpa_authenticator *wpa_auth, |
835 | struct wpa_state_machine *sm, | |
836 | struct wpa_eapol_ie_parse *kde) | |
837 | { | |
838 | struct wpa_ie_data ie; | |
839 | struct rsn_mdie *mdie; | |
840 | ||
841 | if (wpa_parse_wpa_ie_rsn(kde->rsn_ie, kde->rsn_ie_len, &ie) < 0 || | |
9385f03f | 842 | ie.num_pmkid != 1 || !ie.pmkid) { |
f83d3491 JM |
843 | wpa_printf(MSG_DEBUG, |
844 | "FT: No PMKR1Name in FT 4-way handshake message 2/4"); | |
0f857f43 JM |
845 | return -1; |
846 | } | |
847 | ||
848 | os_memcpy(sm->sup_pmk_r1_name, ie.pmkid, PMKID_LEN); | |
849 | wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Supplicant", | |
850 | sm->sup_pmk_r1_name, PMKID_LEN); | |
851 | ||
852 | if (!kde->mdie || !kde->ftie) { | |
f83d3491 JM |
853 | wpa_printf(MSG_DEBUG, |
854 | "FT: No %s in FT 4-way handshake message 2/4", | |
855 | kde->mdie ? "FTIE" : "MDIE"); | |
0f857f43 JM |
856 | return -1; |
857 | } | |
858 | ||
859 | mdie = (struct rsn_mdie *) (kde->mdie + 2); | |
860 | if (kde->mdie[1] < sizeof(struct rsn_mdie) || | |
861 | os_memcmp(wpa_auth->conf.mobility_domain, mdie->mobility_domain, | |
862 | MOBILITY_DOMAIN_ID_LEN) != 0) { | |
863 | wpa_printf(MSG_DEBUG, "FT: MDIE mismatch"); | |
864 | return -1; | |
865 | } | |
866 | ||
867 | if (sm->assoc_resp_ftie && | |
868 | (kde->ftie[1] != sm->assoc_resp_ftie[1] || | |
869 | os_memcmp(kde->ftie, sm->assoc_resp_ftie, | |
870 | 2 + sm->assoc_resp_ftie[1]) != 0)) { | |
871 | wpa_printf(MSG_DEBUG, "FT: FTIE mismatch"); | |
872 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 2/4", | |
873 | kde->ftie, kde->ftie_len); | |
874 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)AssocResp", | |
875 | sm->assoc_resp_ftie, 2 + sm->assoc_resp_ftie[1]); | |
876 | return -1; | |
877 | } | |
878 | ||
879 | return 0; | |
880 | } | |
4ec1fd8e | 881 | #endif /* CONFIG_IEEE80211R_AP */ |
0f857f43 JM |
882 | |
883 | ||
c772d054 JM |
884 | static int wpa_receive_error_report(struct wpa_authenticator *wpa_auth, |
885 | struct wpa_state_machine *sm, int group) | |
ec027805 JM |
886 | { |
887 | /* Supplicant reported a Michael MIC error */ | |
888 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
f83d3491 | 889 | "received EAPOL-Key Error Request (STA detected Michael MIC failure (group=%d))", |
ec027805 | 890 | group); |
fbc72d32 JM |
891 | |
892 | if (group && wpa_auth->conf.wpa_group != WPA_CIPHER_TKIP) { | |
893 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
f83d3491 | 894 | "ignore Michael MIC failure report since group cipher is not TKIP"); |
fbc72d32 JM |
895 | } else if (!group && sm->pairwise != WPA_CIPHER_TKIP) { |
896 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
f83d3491 | 897 | "ignore Michael MIC failure report since pairwise cipher is not TKIP"); |
fbc72d32 | 898 | } else { |
c772d054 JM |
899 | if (wpa_auth_mic_failure_report(wpa_auth, sm->addr) > 0) |
900 | return 1; /* STA entry was removed */ | |
fbc72d32 JM |
901 | sm->dot11RSNAStatsTKIPRemoteMICFailures++; |
902 | wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++; | |
903 | } | |
ec027805 JM |
904 | |
905 | /* | |
906 | * Error report is not a request for a new key handshake, but since | |
907 | * Authenticator may do it, let's change the keys now anyway. | |
908 | */ | |
909 | wpa_request_new_ptk(sm); | |
c772d054 | 910 | return 0; |
ec027805 JM |
911 | } |
912 | ||
913 | ||
f23c5b17 JM |
914 | static int wpa_try_alt_snonce(struct wpa_state_machine *sm, u8 *data, |
915 | size_t data_len) | |
916 | { | |
917 | struct wpa_ptk PTK; | |
918 | int ok = 0; | |
919 | const u8 *pmk = NULL; | |
7a12edd1 | 920 | size_t pmk_len; |
dbfa691d | 921 | int vlan_id = 0; |
f23c5b17 | 922 | |
b729fd8d | 923 | os_memset(&PTK, 0, sizeof(PTK)); |
f23c5b17 | 924 | for (;;) { |
e61fea6b JM |
925 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) && |
926 | !wpa_key_mgmt_sae(sm->wpa_key_mgmt)) { | |
f23c5b17 | 927 | pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, |
dbfa691d JM |
928 | sm->p2p_dev_addr, pmk, &pmk_len, |
929 | &vlan_id); | |
9385f03f | 930 | if (!pmk) |
f23c5b17 | 931 | break; |
f9854c18 MK |
932 | #ifdef CONFIG_IEEE80211R_AP |
933 | if (wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt)) { | |
934 | os_memcpy(sm->xxkey, pmk, pmk_len); | |
935 | sm->xxkey_len = pmk_len; | |
936 | } | |
937 | #endif /* CONFIG_IEEE80211R_AP */ | |
207976f0 | 938 | } else { |
f23c5b17 | 939 | pmk = sm->PMK; |
207976f0 JM |
940 | pmk_len = sm->pmk_len; |
941 | } | |
f23c5b17 | 942 | |
65a44e84 JM |
943 | if (wpa_derive_ptk(sm, sm->alt_SNonce, pmk, pmk_len, &PTK, 0) < |
944 | 0) | |
364c064a | 945 | break; |
f23c5b17 | 946 | |
567da5bb JM |
947 | if (wpa_verify_key_mic(sm->wpa_key_mgmt, pmk_len, &PTK, |
948 | data, data_len) == 0) { | |
08dc8efd JM |
949 | if (sm->PMK != pmk) { |
950 | os_memcpy(sm->PMK, pmk, pmk_len); | |
951 | sm->pmk_len = pmk_len; | |
952 | } | |
f23c5b17 JM |
953 | ok = 1; |
954 | break; | |
955 | } | |
956 | ||
f5e0a332 JM |
957 | if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) || |
958 | wpa_key_mgmt_sae(sm->wpa_key_mgmt)) | |
f23c5b17 JM |
959 | break; |
960 | } | |
961 | ||
962 | if (!ok) { | |
963 | wpa_printf(MSG_DEBUG, | |
964 | "WPA: Earlier SNonce did not result in matching MIC"); | |
965 | return -1; | |
966 | } | |
967 | ||
968 | wpa_printf(MSG_DEBUG, | |
969 | "WPA: Earlier SNonce resulted in matching MIC"); | |
970 | sm->alt_snonce_valid = 0; | |
dbfa691d JM |
971 | |
972 | if (vlan_id && wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) && | |
973 | wpa_auth_update_vlan(sm->wpa_auth, sm->addr, vlan_id) < 0) | |
974 | return -1; | |
975 | ||
f23c5b17 JM |
976 | os_memcpy(sm->SNonce, sm->alt_SNonce, WPA_NONCE_LEN); |
977 | os_memcpy(&sm->PTK, &PTK, sizeof(PTK)); | |
31bc66e4 | 978 | forced_memzero(&PTK, sizeof(PTK)); |
f23c5b17 JM |
979 | sm->PTK_valid = TRUE; |
980 | ||
981 | return 0; | |
982 | } | |
983 | ||
984 | ||
6fc6879b JM |
985 | void wpa_receive(struct wpa_authenticator *wpa_auth, |
986 | struct wpa_state_machine *sm, | |
987 | u8 *data, size_t data_len) | |
988 | { | |
989 | struct ieee802_1x_hdr *hdr; | |
990 | struct wpa_eapol_key *key; | |
991 | u16 key_info, key_data_length; | |
a0bf1b68 | 992 | enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST } msg; |
6fc6879b JM |
993 | char *msgtxt; |
994 | struct wpa_eapol_ie_parse kde; | |
3b5b7aa8 JM |
995 | const u8 *key_data; |
996 | size_t keyhdrlen, mic_len; | |
6d014ffc | 997 | u8 *mic; |
6fc6879b | 998 | |
9385f03f | 999 | if (!wpa_auth || !wpa_auth->conf.wpa || !sm) |
6fc6879b | 1000 | return; |
dc5bad48 | 1001 | wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL data", data, data_len); |
6fc6879b | 1002 | |
567da5bb | 1003 | mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len); |
6d014ffc | 1004 | keyhdrlen = sizeof(*key) + mic_len + 2; |
5e3b5197 | 1005 | |
dc5bad48 JM |
1006 | if (data_len < sizeof(*hdr) + keyhdrlen) { |
1007 | wpa_printf(MSG_DEBUG, "WPA: Ignore too short EAPOL-Key frame"); | |
6fc6879b | 1008 | return; |
dc5bad48 | 1009 | } |
6fc6879b JM |
1010 | |
1011 | hdr = (struct ieee802_1x_hdr *) data; | |
1012 | key = (struct wpa_eapol_key *) (hdr + 1); | |
6d014ffc | 1013 | mic = (u8 *) (key + 1); |
6fc6879b | 1014 | key_info = WPA_GET_BE16(key->key_info); |
6d014ffc JM |
1015 | key_data = mic + mic_len + 2; |
1016 | key_data_length = WPA_GET_BE16(mic + mic_len); | |
0d442aff | 1017 | wpa_printf(MSG_DEBUG, "WPA: Received EAPOL-Key from " MACSTR |
7b156a3c | 1018 | " key_info=0x%x type=%u mic_len=%zu key_data_length=%u", |
dc5bad48 | 1019 | MAC2STR(sm->addr), key_info, key->type, |
7b156a3c | 1020 | mic_len, key_data_length); |
dc5bad48 JM |
1021 | wpa_hexdump(MSG_MSGDUMP, |
1022 | "WPA: EAPOL-Key header (ending before Key MIC)", | |
1023 | key, sizeof(*key)); | |
1024 | wpa_hexdump(MSG_MSGDUMP, "WPA: EAPOL-Key Key MIC", | |
1025 | mic, mic_len); | |
5e3b5197 | 1026 | if (key_data_length > data_len - sizeof(*hdr) - keyhdrlen) { |
f83d3491 | 1027 | wpa_printf(MSG_INFO, |
7b156a3c | 1028 | "WPA: Invalid EAPOL-Key frame - key_data overflow (%d > %zu)", |
6fc6879b | 1029 | key_data_length, |
7b156a3c | 1030 | data_len - sizeof(*hdr) - keyhdrlen); |
6fc6879b JM |
1031 | return; |
1032 | } | |
1033 | ||
f8e96eb6 | 1034 | if (sm->wpa == WPA_VERSION_WPA2) { |
74590e71 JM |
1035 | if (key->type == EAPOL_KEY_TYPE_WPA) { |
1036 | /* | |
1037 | * Some deployed station implementations seem to send | |
1038 | * msg 4/4 with incorrect type value in WPA2 mode. | |
1039 | */ | |
f83d3491 JM |
1040 | wpa_printf(MSG_DEBUG, |
1041 | "Workaround: Allow EAPOL-Key with unexpected WPA type in RSN mode"); | |
74590e71 | 1042 | } else if (key->type != EAPOL_KEY_TYPE_RSN) { |
f83d3491 JM |
1043 | wpa_printf(MSG_DEBUG, |
1044 | "Ignore EAPOL-Key with unexpected type %d in RSN mode", | |
f8e96eb6 JM |
1045 | key->type); |
1046 | return; | |
1047 | } | |
1048 | } else { | |
1049 | if (key->type != EAPOL_KEY_TYPE_WPA) { | |
f83d3491 JM |
1050 | wpa_printf(MSG_DEBUG, |
1051 | "Ignore EAPOL-Key with unexpected type %d in WPA mode", | |
f8e96eb6 JM |
1052 | key->type); |
1053 | return; | |
1054 | } | |
1055 | } | |
1056 | ||
bc8318ac JM |
1057 | wpa_hexdump(MSG_DEBUG, "WPA: Received Key Nonce", key->key_nonce, |
1058 | WPA_NONCE_LEN); | |
1059 | wpa_hexdump(MSG_DEBUG, "WPA: Received Replay Counter", | |
1060 | key->replay_counter, WPA_REPLAY_COUNTER_LEN); | |
1061 | ||
6fc6879b JM |
1062 | /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys |
1063 | * are set */ | |
1064 | ||
a0bf1b68 JM |
1065 | if (key_info & WPA_KEY_INFO_SMK_MESSAGE) { |
1066 | wpa_printf(MSG_DEBUG, "WPA: Ignore SMK message"); | |
1067 | return; | |
1068 | } | |
1069 | ||
1070 | if (key_info & WPA_KEY_INFO_REQUEST) { | |
6fc6879b JM |
1071 | msg = REQUEST; |
1072 | msgtxt = "Request"; | |
1073 | } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) { | |
1074 | msg = GROUP_2; | |
1075 | msgtxt = "2/2 Group"; | |
3b5b7aa8 JM |
1076 | } else if (key_data_length == 0 || |
1077 | (mic_len == 0 && (key_info & WPA_KEY_INFO_ENCR_KEY_DATA) && | |
1078 | key_data_length == AES_BLOCK_SIZE)) { | |
6fc6879b JM |
1079 | msg = PAIRWISE_4; |
1080 | msgtxt = "4/4 Pairwise"; | |
1081 | } else { | |
1082 | msg = PAIRWISE_2; | |
1083 | msgtxt = "2/4 Pairwise"; | |
1084 | } | |
1085 | ||
6fc6879b JM |
1086 | if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 || |
1087 | msg == GROUP_2) { | |
1088 | u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK; | |
eb7719ff JM |
1089 | if (sm->pairwise == WPA_CIPHER_CCMP || |
1090 | sm->pairwise == WPA_CIPHER_GCMP) { | |
4bc801ab JM |
1091 | if (wpa_use_cmac(sm->wpa_key_mgmt) && |
1092 | !wpa_use_akm_defined(sm->wpa_key_mgmt) && | |
6fc6879b JM |
1093 | ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) { |
1094 | wpa_auth_logger(wpa_auth, sm->addr, | |
1095 | LOGGER_WARNING, | |
f83d3491 | 1096 | "advertised support for AES-128-CMAC, but did not use it"); |
6fc6879b JM |
1097 | return; |
1098 | } | |
1099 | ||
4bc801ab JM |
1100 | if (!wpa_use_cmac(sm->wpa_key_mgmt) && |
1101 | !wpa_use_akm_defined(sm->wpa_key_mgmt) && | |
6fc6879b JM |
1102 | ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { |
1103 | wpa_auth_logger(wpa_auth, sm->addr, | |
1104 | LOGGER_WARNING, | |
f83d3491 | 1105 | "did not use HMAC-SHA1-AES with CCMP/GCMP"); |
6fc6879b JM |
1106 | return; |
1107 | } | |
1108 | } | |
929a2ea5 | 1109 | |
4bc801ab | 1110 | if (wpa_use_akm_defined(sm->wpa_key_mgmt) && |
929a2ea5 JM |
1111 | ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) { |
1112 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING, | |
1113 | "did not use EAPOL-Key descriptor version 0 as required for AKM-defined cases"); | |
1114 | return; | |
1115 | } | |
6fc6879b JM |
1116 | } |
1117 | ||
1118 | if (key_info & WPA_KEY_INFO_REQUEST) { | |
1119 | if (sm->req_replay_counter_used && | |
1120 | os_memcmp(key->replay_counter, sm->req_replay_counter, | |
1121 | WPA_REPLAY_COUNTER_LEN) <= 0) { | |
1122 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING, | |
f83d3491 | 1123 | "received EAPOL-Key request with replayed counter"); |
6fc6879b JM |
1124 | return; |
1125 | } | |
1126 | } | |
1127 | ||
1128 | if (!(key_info & WPA_KEY_INFO_REQUEST) && | |
68921e24 | 1129 | !wpa_replay_counter_valid(sm->key_replay, key->replay_counter)) { |
22a299ee | 1130 | int i; |
68921e24 JM |
1131 | |
1132 | if (msg == PAIRWISE_2 && | |
1133 | wpa_replay_counter_valid(sm->prev_key_replay, | |
1134 | key->replay_counter) && | |
1135 | sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING && | |
1136 | os_memcmp(sm->SNonce, key->key_nonce, WPA_NONCE_LEN) != 0) | |
1137 | { | |
1138 | /* | |
1139 | * Some supplicant implementations (e.g., Windows XP | |
1140 | * WZC) update SNonce for each EAPOL-Key 2/4. This | |
1141 | * breaks the workaround on accepting any of the | |
1142 | * pending requests, so allow the SNonce to be updated | |
1143 | * even if we have already sent out EAPOL-Key 3/4. | |
1144 | */ | |
1145 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
f83d3491 | 1146 | "Process SNonce update from STA based on retransmitted EAPOL-Key 1/4"); |
68921e24 | 1147 | sm->update_snonce = 1; |
f23c5b17 JM |
1148 | os_memcpy(sm->alt_SNonce, sm->SNonce, WPA_NONCE_LEN); |
1149 | sm->alt_snonce_valid = TRUE; | |
1150 | os_memcpy(sm->alt_replay_counter, | |
1151 | sm->key_replay[0].counter, | |
1152 | WPA_REPLAY_COUNTER_LEN); | |
1153 | goto continue_processing; | |
1154 | } | |
1155 | ||
1156 | if (msg == PAIRWISE_4 && sm->alt_snonce_valid && | |
1157 | sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING && | |
1158 | os_memcmp(key->replay_counter, sm->alt_replay_counter, | |
1159 | WPA_REPLAY_COUNTER_LEN) == 0) { | |
1160 | /* | |
1161 | * Supplicant may still be using the old SNonce since | |
1162 | * there was two EAPOL-Key 2/4 messages and they had | |
1163 | * different SNonce values. | |
1164 | */ | |
1165 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1166 | "Try to process received EAPOL-Key 4/4 based on old Replay Counter and SNonce from an earlier EAPOL-Key 1/4"); | |
68921e24 JM |
1167 | goto continue_processing; |
1168 | } | |
1169 | ||
1170 | if (msg == PAIRWISE_2 && | |
1171 | wpa_replay_counter_valid(sm->prev_key_replay, | |
1172 | key->replay_counter) && | |
1173 | sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING) { | |
1174 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
f83d3491 JM |
1175 | "ignore retransmitted EAPOL-Key %s - SNonce did not change", |
1176 | msgtxt); | |
68921e24 JM |
1177 | } else { |
1178 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
f83d3491 JM |
1179 | "received EAPOL-Key %s with unexpected replay counter", |
1180 | msgtxt); | |
68921e24 | 1181 | } |
22a299ee JM |
1182 | for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) { |
1183 | if (!sm->key_replay[i].valid) | |
1184 | break; | |
1185 | wpa_hexdump(MSG_DEBUG, "pending replay counter", | |
1186 | sm->key_replay[i].counter, | |
1187 | WPA_REPLAY_COUNTER_LEN); | |
1188 | } | |
6fc6879b JM |
1189 | wpa_hexdump(MSG_DEBUG, "received replay counter", |
1190 | key->replay_counter, WPA_REPLAY_COUNTER_LEN); | |
1191 | return; | |
1192 | } | |
1193 | ||
68921e24 | 1194 | continue_processing: |
3b5b7aa8 JM |
1195 | #ifdef CONFIG_FILS |
1196 | if (sm->wpa == WPA_VERSION_WPA2 && mic_len == 0 && | |
1197 | !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { | |
1198 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1199 | "WPA: Encr Key Data bit not set even though AEAD cipher is supposed to be used - drop frame"); | |
1200 | return; | |
1201 | } | |
1202 | #endif /* CONFIG_FILS */ | |
1203 | ||
6fc6879b JM |
1204 | switch (msg) { |
1205 | case PAIRWISE_2: | |
1206 | if (sm->wpa_ptk_state != WPA_PTK_PTKSTART && | |
68921e24 JM |
1207 | sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING && |
1208 | (!sm->update_snonce || | |
1209 | sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING)) { | |
6fc6879b | 1210 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, |
f83d3491 | 1211 | "received EAPOL-Key msg 2/4 in invalid state (%d) - dropped", |
6fc6879b JM |
1212 | sm->wpa_ptk_state); |
1213 | return; | |
1214 | } | |
bbb921da | 1215 | random_add_randomness(key->key_nonce, WPA_NONCE_LEN); |
08704cd8 JM |
1216 | if (sm->group->reject_4way_hs_for_entropy) { |
1217 | /* | |
1218 | * The system did not have enough entropy to generate | |
1219 | * strong random numbers. Reject the first 4-way | |
1220 | * handshake(s) and collect some entropy based on the | |
1221 | * information from it. Once enough entropy is | |
1222 | * available, the next atempt will trigger GMK/Key | |
1223 | * Counter update and the station will be allowed to | |
1224 | * continue. | |
1225 | */ | |
f83d3491 JM |
1226 | wpa_printf(MSG_DEBUG, |
1227 | "WPA: Reject 4-way handshake to collect more entropy for random number generation"); | |
08704cd8 | 1228 | random_mark_pool_ready(); |
567da5bb JM |
1229 | wpa_sta_disconnect(wpa_auth, sm->addr, |
1230 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
08704cd8 JM |
1231 | return; |
1232 | } | |
6fc6879b JM |
1233 | break; |
1234 | case PAIRWISE_4: | |
1235 | if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING || | |
1236 | !sm->PTK_valid) { | |
1237 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
f83d3491 | 1238 | "received EAPOL-Key msg 4/4 in invalid state (%d) - dropped", |
6fc6879b JM |
1239 | sm->wpa_ptk_state); |
1240 | return; | |
1241 | } | |
1242 | break; | |
1243 | case GROUP_2: | |
1244 | if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING | |
1245 | || !sm->PTK_valid) { | |
1246 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
f83d3491 | 1247 | "received EAPOL-Key msg 2/2 in invalid state (%d) - dropped", |
6fc6879b JM |
1248 | sm->wpa_ptk_group_state); |
1249 | return; | |
1250 | } | |
1251 | break; | |
6fc6879b JM |
1252 | case REQUEST: |
1253 | break; | |
1254 | } | |
1255 | ||
1256 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1257 | "received EAPOL-Key frame (%s)", msgtxt); | |
1258 | ||
1259 | if (key_info & WPA_KEY_INFO_ACK) { | |
1260 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1261 | "received invalid EAPOL-Key: Key Ack set"); | |
1262 | return; | |
1263 | } | |
1264 | ||
b9866483 JM |
1265 | if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt) && |
1266 | !(key_info & WPA_KEY_INFO_MIC)) { | |
6fc6879b JM |
1267 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, |
1268 | "received invalid EAPOL-Key: Key MIC not set"); | |
1269 | return; | |
1270 | } | |
1271 | ||
b9866483 JM |
1272 | #ifdef CONFIG_FILS |
1273 | if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) && | |
1274 | (key_info & WPA_KEY_INFO_MIC)) { | |
1275 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1276 | "received invalid EAPOL-Key: Key MIC set"); | |
1277 | return; | |
1278 | } | |
1279 | #endif /* CONFIG_FILS */ | |
1280 | ||
6fc6879b | 1281 | sm->MICVerified = FALSE; |
68921e24 | 1282 | if (sm->PTK_valid && !sm->update_snonce) { |
3b5b7aa8 | 1283 | if (mic_len && |
567da5bb JM |
1284 | wpa_verify_key_mic(sm->wpa_key_mgmt, sm->pmk_len, &sm->PTK, |
1285 | data, data_len) && | |
f23c5b17 JM |
1286 | (msg != PAIRWISE_4 || !sm->alt_snonce_valid || |
1287 | wpa_try_alt_snonce(sm, data, data_len))) { | |
6fc6879b JM |
1288 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, |
1289 | "received EAPOL-Key with invalid MIC"); | |
525923b1 JM |
1290 | #ifdef TEST_FUZZ |
1291 | wpa_printf(MSG_INFO, | |
1292 | "TEST: Ignore Key MIC failure for fuzz testing"); | |
1293 | goto continue_fuzz; | |
1294 | #endif /* TEST_FUZZ */ | |
6fc6879b JM |
1295 | return; |
1296 | } | |
75c8563e JM |
1297 | #ifdef CONFIG_FILS |
1298 | if (!mic_len && | |
1299 | wpa_aead_decrypt(sm, &sm->PTK, data, data_len, | |
1300 | &key_data_length) < 0) { | |
1301 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1302 | "received EAPOL-Key with invalid MIC"); | |
525923b1 JM |
1303 | #ifdef TEST_FUZZ |
1304 | wpa_printf(MSG_INFO, | |
1305 | "TEST: Ignore Key MIC failure for fuzz testing"); | |
1306 | goto continue_fuzz; | |
1307 | #endif /* TEST_FUZZ */ | |
75c8563e JM |
1308 | return; |
1309 | } | |
1310 | #endif /* CONFIG_FILS */ | |
525923b1 JM |
1311 | #ifdef TEST_FUZZ |
1312 | continue_fuzz: | |
1313 | #endif /* TEST_FUZZ */ | |
6fc6879b JM |
1314 | sm->MICVerified = TRUE; |
1315 | eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm); | |
e4bf4db9 | 1316 | sm->pending_1_of_4_timeout = 0; |
6fc6879b JM |
1317 | } |
1318 | ||
1319 | if (key_info & WPA_KEY_INFO_REQUEST) { | |
1320 | if (sm->MICVerified) { | |
1321 | sm->req_replay_counter_used = 1; | |
1322 | os_memcpy(sm->req_replay_counter, key->replay_counter, | |
1323 | WPA_REPLAY_COUNTER_LEN); | |
1324 | } else { | |
1325 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
f83d3491 | 1326 | "received EAPOL-Key request with invalid MIC"); |
6fc6879b JM |
1327 | return; |
1328 | } | |
1329 | ||
1330 | /* | |
1331 | * TODO: should decrypt key data field if encryption was used; | |
1332 | * even though MAC address KDE is not normally encrypted, | |
1333 | * supplicant is allowed to encrypt it. | |
1334 | */ | |
a0bf1b68 | 1335 | if (key_info & WPA_KEY_INFO_ERROR) { |
c772d054 JM |
1336 | if (wpa_receive_error_report( |
1337 | wpa_auth, sm, | |
1338 | !(key_info & WPA_KEY_INFO_KEY_TYPE)) > 0) | |
1339 | return; /* STA entry was removed */ | |
6fc6879b JM |
1340 | } else if (key_info & WPA_KEY_INFO_KEY_TYPE) { |
1341 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
f83d3491 | 1342 | "received EAPOL-Key Request for new 4-Way Handshake"); |
6fc6879b | 1343 | wpa_request_new_ptk(sm); |
6fc6879b | 1344 | } else if (key_data_length > 0 && |
5e3b5197 JM |
1345 | wpa_parse_kde_ies(key_data, key_data_length, |
1346 | &kde) == 0 && | |
6fc6879b JM |
1347 | kde.mac_addr) { |
1348 | } else { | |
1349 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
f83d3491 | 1350 | "received EAPOL-Key Request for GTK rekeying"); |
6fc6879b JM |
1351 | eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL); |
1352 | wpa_rekey_gtk(wpa_auth, NULL); | |
1353 | } | |
1354 | } else { | |
68921e24 JM |
1355 | /* Do not allow the same key replay counter to be reused. */ |
1356 | wpa_replay_counter_mark_invalid(sm->key_replay, | |
1357 | key->replay_counter); | |
1358 | ||
1359 | if (msg == PAIRWISE_2) { | |
1360 | /* | |
1361 | * Maintain a copy of the pending EAPOL-Key frames in | |
1362 | * case the EAPOL-Key frame was retransmitted. This is | |
1363 | * needed to allow EAPOL-Key msg 2/4 reply to another | |
1364 | * pending msg 1/4 to update the SNonce to work around | |
1365 | * unexpected supplicant behavior. | |
1366 | */ | |
1367 | os_memcpy(sm->prev_key_replay, sm->key_replay, | |
1368 | sizeof(sm->key_replay)); | |
1369 | } else { | |
1370 | os_memset(sm->prev_key_replay, 0, | |
1371 | sizeof(sm->prev_key_replay)); | |
1372 | } | |
1373 | ||
1374 | /* | |
1375 | * Make sure old valid counters are not accepted anymore and | |
1376 | * do not get copied again. | |
1377 | */ | |
1378 | wpa_replay_counter_mark_invalid(sm->key_replay, NULL); | |
6fc6879b JM |
1379 | } |
1380 | ||
6fc6879b | 1381 | os_free(sm->last_rx_eapol_key); |
a1f11e34 | 1382 | sm->last_rx_eapol_key = os_memdup(data, data_len); |
9385f03f | 1383 | if (!sm->last_rx_eapol_key) |
6fc6879b | 1384 | return; |
6fc6879b JM |
1385 | sm->last_rx_eapol_key_len = data_len; |
1386 | ||
0d442aff | 1387 | sm->rx_eapol_key_secure = !!(key_info & WPA_KEY_INFO_SECURE); |
6fc6879b JM |
1388 | sm->EAPOLKeyReceived = TRUE; |
1389 | sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE); | |
1390 | sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST); | |
1391 | os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN); | |
1392 | wpa_sm_step(sm); | |
1393 | } | |
1394 | ||
1395 | ||
3c7302c2 JM |
1396 | static int wpa_gmk_to_gtk(const u8 *gmk, const char *label, const u8 *addr, |
1397 | const u8 *gnonce, u8 *gtk, size_t gtk_len) | |
6fc6879b | 1398 | { |
c6eb3e34 | 1399 | u8 data[ETH_ALEN + WPA_NONCE_LEN + 8 + WPA_GTK_MAX_LEN]; |
5cb9d5c3 | 1400 | u8 *pos; |
3c7302c2 | 1401 | int ret = 0; |
6fc6879b | 1402 | |
5cb9d5c3 JM |
1403 | /* GTK = PRF-X(GMK, "Group key expansion", |
1404 | * AA || GNonce || Time || random data) | |
1405 | * The example described in the IEEE 802.11 standard uses only AA and | |
1406 | * GNonce as inputs here. Add some more entropy since this derivation | |
1407 | * is done only at the Authenticator and as such, does not need to be | |
1408 | * exactly same. | |
1409 | */ | |
c6eb3e34 | 1410 | os_memset(data, 0, sizeof(data)); |
6fc6879b JM |
1411 | os_memcpy(data, addr, ETH_ALEN); |
1412 | os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN); | |
5cb9d5c3 JM |
1413 | pos = data + ETH_ALEN + WPA_NONCE_LEN; |
1414 | wpa_get_ntp_timestamp(pos); | |
525923b1 JM |
1415 | #ifdef TEST_FUZZ |
1416 | os_memset(pos, 0xef, 8); | |
1417 | #endif /* TEST_FUZZ */ | |
5cb9d5c3 | 1418 | pos += 8; |
c6eb3e34 | 1419 | if (random_get_bytes(pos, gtk_len) < 0) |
3c7302c2 | 1420 | ret = -1; |
6fc6879b | 1421 | |
c6eb3e34 JM |
1422 | #ifdef CONFIG_SHA384 |
1423 | if (sha384_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), | |
1424 | gtk, gtk_len) < 0) | |
3c7302c2 | 1425 | ret = -1; |
c6eb3e34 JM |
1426 | #else /* CONFIG_SHA384 */ |
1427 | #ifdef CONFIG_SHA256 | |
1428 | if (sha256_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), | |
1429 | gtk, gtk_len) < 0) | |
1430 | ret = -1; | |
1431 | #else /* CONFIG_SHA256 */ | |
1432 | if (sha1_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), | |
1433 | gtk, gtk_len) < 0) | |
1434 | ret = -1; | |
1435 | #endif /* CONFIG_SHA256 */ | |
1436 | #endif /* CONFIG_SHA384 */ | |
3c7302c2 | 1437 | |
31bc66e4 JM |
1438 | forced_memzero(data, sizeof(data)); |
1439 | ||
3c7302c2 | 1440 | return ret; |
6fc6879b JM |
1441 | } |
1442 | ||
1443 | ||
1444 | static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx) | |
1445 | { | |
1446 | struct wpa_authenticator *wpa_auth = eloop_ctx; | |
1447 | struct wpa_state_machine *sm = timeout_ctx; | |
1448 | ||
e4bf4db9 | 1449 | sm->pending_1_of_4_timeout = 0; |
6fc6879b JM |
1450 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout"); |
1451 | sm->TimeoutEvt = TRUE; | |
1452 | wpa_sm_step(sm); | |
1453 | } | |
1454 | ||
1455 | ||
1456 | void __wpa_send_eapol(struct wpa_authenticator *wpa_auth, | |
1457 | struct wpa_state_machine *sm, int key_info, | |
1458 | const u8 *key_rsc, const u8 *nonce, | |
1459 | const u8 *kde, size_t kde_len, | |
1460 | int keyidx, int encr, int force_version) | |
1461 | { | |
62e12afc | 1462 | struct wpa_auth_config *conf = &wpa_auth->conf; |
6fc6879b JM |
1463 | struct ieee802_1x_hdr *hdr; |
1464 | struct wpa_eapol_key *key; | |
5e3b5197 | 1465 | size_t len, mic_len, keyhdrlen; |
6fc6879b JM |
1466 | int alg; |
1467 | int key_data_len, pad_len = 0; | |
1468 | u8 *buf, *pos; | |
1469 | int version, pairwise; | |
22a299ee | 1470 | int i; |
6d014ffc | 1471 | u8 *key_mic, *key_data; |
6fc6879b | 1472 | |
567da5bb | 1473 | mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len); |
6d014ffc | 1474 | keyhdrlen = sizeof(*key) + mic_len + 2; |
5e3b5197 JM |
1475 | |
1476 | len = sizeof(struct ieee802_1x_hdr) + keyhdrlen; | |
6fc6879b JM |
1477 | |
1478 | if (force_version) | |
1479 | version = force_version; | |
4bc801ab | 1480 | else if (wpa_use_akm_defined(sm->wpa_key_mgmt)) |
a14896e8 | 1481 | version = WPA_KEY_INFO_TYPE_AKM_DEFINED; |
4bc801ab | 1482 | else if (wpa_use_cmac(sm->wpa_key_mgmt)) |
6fc6879b | 1483 | version = WPA_KEY_INFO_TYPE_AES_128_CMAC; |
eb7719ff | 1484 | else if (sm->pairwise != WPA_CIPHER_TKIP) |
6fc6879b JM |
1485 | version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES; |
1486 | else | |
1487 | version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4; | |
1488 | ||
8543ed8a | 1489 | pairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE); |
6fc6879b | 1490 | |
f83d3491 | 1491 | wpa_printf(MSG_DEBUG, |
7b156a3c | 1492 | "WPA: Send EAPOL(version=%d secure=%d mic=%d ack=%d install=%d pairwise=%d kde_len=%zu keyidx=%d encr=%d)", |
6fc6879b JM |
1493 | version, |
1494 | (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0, | |
1495 | (key_info & WPA_KEY_INFO_MIC) ? 1 : 0, | |
1496 | (key_info & WPA_KEY_INFO_ACK) ? 1 : 0, | |
1497 | (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0, | |
7b156a3c | 1498 | pairwise, kde_len, keyidx, encr); |
6fc6879b JM |
1499 | |
1500 | key_data_len = kde_len; | |
1501 | ||
1502 | if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || | |
4bc801ab | 1503 | wpa_use_aes_key_wrap(sm->wpa_key_mgmt) || |
6fc6879b JM |
1504 | version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) { |
1505 | pad_len = key_data_len % 8; | |
1506 | if (pad_len) | |
1507 | pad_len = 8 - pad_len; | |
1508 | key_data_len += pad_len + 8; | |
1509 | } | |
1510 | ||
1511 | len += key_data_len; | |
b729fd8d JM |
1512 | if (!mic_len && encr) |
1513 | len += AES_BLOCK_SIZE; | |
6fc6879b JM |
1514 | |
1515 | hdr = os_zalloc(len); | |
9385f03f | 1516 | if (!hdr) |
6fc6879b | 1517 | return; |
62e12afc | 1518 | hdr->version = conf->eapol_version; |
6fc6879b JM |
1519 | hdr->type = IEEE802_1X_TYPE_EAPOL_KEY; |
1520 | hdr->length = host_to_be16(len - sizeof(*hdr)); | |
1521 | key = (struct wpa_eapol_key *) (hdr + 1); | |
6d014ffc | 1522 | key_mic = (u8 *) (key + 1); |
5e3b5197 | 1523 | key_data = ((u8 *) (hdr + 1)) + keyhdrlen; |
6fc6879b JM |
1524 | |
1525 | key->type = sm->wpa == WPA_VERSION_WPA2 ? | |
1526 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; | |
1527 | key_info |= version; | |
1528 | if (encr && sm->wpa == WPA_VERSION_WPA2) | |
1529 | key_info |= WPA_KEY_INFO_ENCR_KEY_DATA; | |
1530 | if (sm->wpa != WPA_VERSION_WPA2) | |
1531 | key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT; | |
1532 | WPA_PUT_BE16(key->key_info, key_info); | |
1533 | ||
62e12afc | 1534 | alg = pairwise ? sm->pairwise : conf->wpa_group; |
a0bf1b68 | 1535 | if (sm->wpa == WPA_VERSION_WPA2 && !pairwise) |
6fc6879b | 1536 | WPA_PUT_BE16(key->key_length, 0); |
caab23f1 JM |
1537 | else |
1538 | WPA_PUT_BE16(key->key_length, wpa_cipher_key_len(alg)); | |
6fc6879b | 1539 | |
22a299ee JM |
1540 | for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) { |
1541 | sm->key_replay[i].valid = sm->key_replay[i - 1].valid; | |
1542 | os_memcpy(sm->key_replay[i].counter, | |
1543 | sm->key_replay[i - 1].counter, | |
1544 | WPA_REPLAY_COUNTER_LEN); | |
1545 | } | |
1546 | inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN); | |
1547 | os_memcpy(key->replay_counter, sm->key_replay[0].counter, | |
6fc6879b | 1548 | WPA_REPLAY_COUNTER_LEN); |
db099951 JM |
1549 | wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter", |
1550 | key->replay_counter, WPA_REPLAY_COUNTER_LEN); | |
22a299ee | 1551 | sm->key_replay[0].valid = TRUE; |
6fc6879b JM |
1552 | |
1553 | if (nonce) | |
1554 | os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN); | |
1555 | ||
1556 | if (key_rsc) | |
1557 | os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN); | |
1558 | ||
1559 | if (kde && !encr) { | |
5e3b5197 | 1560 | os_memcpy(key_data, kde, kde_len); |
6d014ffc | 1561 | WPA_PUT_BE16(key_mic + mic_len, kde_len); |
b729fd8d | 1562 | #ifdef CONFIG_FILS |
c05f96a3 | 1563 | } else if (!mic_len && kde) { |
b729fd8d JM |
1564 | const u8 *aad[1]; |
1565 | size_t aad_len[1]; | |
1566 | ||
1567 | WPA_PUT_BE16(key_mic, AES_BLOCK_SIZE + kde_len); | |
1568 | wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data", | |
1569 | kde, kde_len); | |
1570 | ||
1571 | wpa_hexdump_key(MSG_DEBUG, "WPA: KEK", | |
1572 | sm->PTK.kek, sm->PTK.kek_len); | |
1573 | /* AES-SIV AAD from EAPOL protocol version field (inclusive) to | |
1574 | * to Key Data (exclusive). */ | |
1575 | aad[0] = (u8 *) hdr; | |
1576 | aad_len[0] = key_mic + 2 - (u8 *) hdr; | |
1577 | if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len, kde, kde_len, | |
1578 | 1, aad, aad_len, key_mic + 2) < 0) { | |
1579 | wpa_printf(MSG_DEBUG, "WPA: AES-SIV encryption failed"); | |
1580 | return; | |
1581 | } | |
1582 | ||
1583 | wpa_hexdump(MSG_DEBUG, "WPA: Encrypted Key Data from SIV", | |
1584 | key_mic + 2, AES_BLOCK_SIZE + kde_len); | |
1585 | #endif /* CONFIG_FILS */ | |
6fc6879b JM |
1586 | } else if (encr && kde) { |
1587 | buf = os_zalloc(key_data_len); | |
9385f03f | 1588 | if (!buf) { |
6fc6879b JM |
1589 | os_free(hdr); |
1590 | return; | |
1591 | } | |
1592 | pos = buf; | |
1593 | os_memcpy(pos, kde, kde_len); | |
1594 | pos += kde_len; | |
1595 | ||
1596 | if (pad_len) | |
1597 | *pos++ = 0xdd; | |
1598 | ||
1599 | wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data", | |
1600 | buf, key_data_len); | |
1601 | if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || | |
4bc801ab | 1602 | wpa_use_aes_key_wrap(sm->wpa_key_mgmt) || |
6fc6879b | 1603 | version == WPA_KEY_INFO_TYPE_AES_128_CMAC) { |
ef9627cb | 1604 | wpa_printf(MSG_DEBUG, |
7b156a3c JM |
1605 | "WPA: Encrypt Key Data using AES-WRAP (KEK length %zu)", |
1606 | sm->PTK.kek_len); | |
98cd3d1c | 1607 | if (aes_wrap(sm->PTK.kek, sm->PTK.kek_len, |
5e3b5197 | 1608 | (key_data_len - 8) / 8, buf, key_data)) { |
6fc6879b JM |
1609 | os_free(hdr); |
1610 | os_free(buf); | |
1611 | return; | |
1612 | } | |
6d014ffc | 1613 | WPA_PUT_BE16(key_mic + mic_len, key_data_len); |
7cb53ded | 1614 | #ifndef CONFIG_NO_RC4 |
98cd3d1c | 1615 | } else if (sm->PTK.kek_len == 16) { |
6fc6879b | 1616 | u8 ek[32]; |
ef9627cb JM |
1617 | |
1618 | wpa_printf(MSG_DEBUG, | |
1619 | "WPA: Encrypt Key Data using RC4"); | |
6fc6879b JM |
1620 | os_memcpy(key->key_iv, |
1621 | sm->group->Counter + WPA_NONCE_LEN - 16, 16); | |
1622 | inc_byte_array(sm->group->Counter, WPA_NONCE_LEN); | |
1623 | os_memcpy(ek, key->key_iv, 16); | |
98cd3d1c | 1624 | os_memcpy(ek + 16, sm->PTK.kek, sm->PTK.kek_len); |
5e3b5197 JM |
1625 | os_memcpy(key_data, buf, key_data_len); |
1626 | rc4_skip(ek, 32, 256, key_data, key_data_len); | |
6d014ffc | 1627 | WPA_PUT_BE16(key_mic + mic_len, key_data_len); |
7cb53ded | 1628 | #endif /* CONFIG_NO_RC4 */ |
98cd3d1c JM |
1629 | } else { |
1630 | os_free(hdr); | |
1631 | os_free(buf); | |
1632 | return; | |
6fc6879b JM |
1633 | } |
1634 | os_free(buf); | |
1635 | } | |
1636 | ||
1637 | if (key_info & WPA_KEY_INFO_MIC) { | |
b729fd8d | 1638 | if (!sm->PTK_valid || !mic_len) { |
6fc6879b | 1639 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, |
f83d3491 | 1640 | "PTK not valid when sending EAPOL-Key frame"); |
6fc6879b JM |
1641 | os_free(hdr); |
1642 | return; | |
1643 | } | |
5e3b5197 | 1644 | |
beae255a JM |
1645 | if (wpa_eapol_key_mic(sm->PTK.kck, sm->PTK.kck_len, |
1646 | sm->wpa_key_mgmt, version, | |
1647 | (u8 *) hdr, len, key_mic) < 0) { | |
1648 | os_free(hdr); | |
1649 | return; | |
1650 | } | |
7af092a0 JB |
1651 | #ifdef CONFIG_TESTING_OPTIONS |
1652 | if (!pairwise && | |
62e12afc JM |
1653 | conf->corrupt_gtk_rekey_mic_probability > 0.0 && |
1654 | drand48() < conf->corrupt_gtk_rekey_mic_probability) { | |
7af092a0 JB |
1655 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, |
1656 | "Corrupting group EAPOL-Key Key MIC"); | |
5e3b5197 | 1657 | key_mic[0]++; |
7af092a0 JB |
1658 | } |
1659 | #endif /* CONFIG_TESTING_OPTIONS */ | |
6fc6879b JM |
1660 | } |
1661 | ||
62e12afc | 1662 | wpa_auth_set_eapol(wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx, 1); |
6fc6879b JM |
1663 | wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len, |
1664 | sm->pairwise_set); | |
1665 | os_free(hdr); | |
1666 | } | |
1667 | ||
1668 | ||
1669 | static void wpa_send_eapol(struct wpa_authenticator *wpa_auth, | |
1670 | struct wpa_state_machine *sm, int key_info, | |
1671 | const u8 *key_rsc, const u8 *nonce, | |
1672 | const u8 *kde, size_t kde_len, | |
1673 | int keyidx, int encr) | |
1674 | { | |
1675 | int timeout_ms; | |
1676 | int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE; | |
41f140d3 | 1677 | u32 ctr; |
6fc6879b | 1678 | |
9385f03f | 1679 | if (!sm) |
6fc6879b JM |
1680 | return; |
1681 | ||
1682 | __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len, | |
1683 | keyidx, encr, 0); | |
1684 | ||
bae61562 | 1685 | ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr; |
e4bf4db9 | 1686 | if (ctr == 1 && wpa_auth->conf.tx_status) |
00338a4f JM |
1687 | timeout_ms = pairwise ? eapol_key_timeout_first : |
1688 | eapol_key_timeout_first_group; | |
bae61562 JM |
1689 | else |
1690 | timeout_ms = eapol_key_timeout_subseq; | |
6f234c1e JM |
1691 | if (wpa_auth->conf.wpa_disable_eapol_key_retries && |
1692 | (!pairwise || (key_info & WPA_KEY_INFO_MIC))) | |
1693 | timeout_ms = eapol_key_timeout_no_retrans; | |
e4bf4db9 JM |
1694 | if (pairwise && ctr == 1 && !(key_info & WPA_KEY_INFO_MIC)) |
1695 | sm->pending_1_of_4_timeout = 1; | |
525923b1 JM |
1696 | #ifdef TEST_FUZZ |
1697 | timeout_ms = 1; | |
1698 | #endif /* TEST_FUZZ */ | |
f83d3491 JM |
1699 | wpa_printf(MSG_DEBUG, |
1700 | "WPA: Use EAPOL-Key timeout of %u ms (retry counter %u)", | |
1701 | timeout_ms, ctr); | |
6fc6879b JM |
1702 | eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000, |
1703 | wpa_send_eapol_timeout, wpa_auth, sm); | |
1704 | } | |
1705 | ||
1706 | ||
567da5bb JM |
1707 | static int wpa_verify_key_mic(int akmp, size_t pmk_len, struct wpa_ptk *PTK, |
1708 | u8 *data, size_t data_len) | |
6fc6879b JM |
1709 | { |
1710 | struct ieee802_1x_hdr *hdr; | |
1711 | struct wpa_eapol_key *key; | |
1712 | u16 key_info; | |
1713 | int ret = 0; | |
6d014ffc | 1714 | u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN], *mic_pos; |
567da5bb | 1715 | size_t mic_len = wpa_mic_len(akmp, pmk_len); |
6fc6879b JM |
1716 | |
1717 | if (data_len < sizeof(*hdr) + sizeof(*key)) | |
1718 | return -1; | |
1719 | ||
1720 | hdr = (struct ieee802_1x_hdr *) data; | |
1721 | key = (struct wpa_eapol_key *) (hdr + 1); | |
6d014ffc | 1722 | mic_pos = (u8 *) (key + 1); |
6fc6879b | 1723 | key_info = WPA_GET_BE16(key->key_info); |
6d014ffc JM |
1724 | os_memcpy(mic, mic_pos, mic_len); |
1725 | os_memset(mic_pos, 0, mic_len); | |
98cd3d1c JM |
1726 | if (wpa_eapol_key_mic(PTK->kck, PTK->kck_len, akmp, |
1727 | key_info & WPA_KEY_INFO_TYPE_MASK, | |
6d014ffc JM |
1728 | data, data_len, mic_pos) || |
1729 | os_memcmp_const(mic, mic_pos, mic_len) != 0) | |
6fc6879b | 1730 | ret = -1; |
6d014ffc | 1731 | os_memcpy(mic_pos, mic, mic_len); |
6fc6879b JM |
1732 | return ret; |
1733 | } | |
1734 | ||
1735 | ||
1736 | void wpa_remove_ptk(struct wpa_state_machine *sm) | |
1737 | { | |
1738 | sm->PTK_valid = FALSE; | |
1739 | os_memset(&sm->PTK, 0, sizeof(sm->PTK)); | |
2a0b86d3 | 1740 | if (wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, NULL, |
a919a260 | 1741 | 0, KEY_FLAG_PAIRWISE)) |
2a0b86d3 JM |
1742 | wpa_printf(MSG_DEBUG, |
1743 | "RSN: PTK removal from the driver failed"); | |
3f88d2ba | 1744 | if (sm->use_ext_key_id && |
862aac1f AW |
1745 | wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 1, NULL, |
1746 | 0, KEY_FLAG_PAIRWISE)) | |
1747 | wpa_printf(MSG_DEBUG, | |
1748 | "RSN: PTK Key ID 1 removal from the driver failed"); | |
6fc6879b | 1749 | sm->pairwise_set = FALSE; |
581a8cde | 1750 | eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm); |
6fc6879b JM |
1751 | } |
1752 | ||
1753 | ||
bb119228 | 1754 | int wpa_auth_sm_event(struct wpa_state_machine *sm, enum wpa_event event) |
6fc6879b | 1755 | { |
5d22a1d5 JM |
1756 | int remove_ptk = 1; |
1757 | ||
9385f03f | 1758 | if (!sm) |
6f9b5d16 | 1759 | return -1; |
6fc6879b JM |
1760 | |
1761 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
1762 | "event %d notification", event); | |
1763 | ||
1764 | switch (event) { | |
1765 | case WPA_AUTH: | |
c50d94f1 BC |
1766 | #ifdef CONFIG_MESH |
1767 | /* PTKs are derived through AMPE */ | |
1768 | if (wpa_auth_start_ampe(sm->wpa_auth, sm->addr)) { | |
1769 | /* not mesh */ | |
1770 | break; | |
1771 | } | |
1772 | return 0; | |
1773 | #endif /* CONFIG_MESH */ | |
6fc6879b JM |
1774 | case WPA_ASSOC: |
1775 | break; | |
1776 | case WPA_DEAUTH: | |
1777 | case WPA_DISASSOC: | |
1778 | sm->DeauthenticationRequest = TRUE; | |
09ab81b9 JM |
1779 | #ifdef CONFIG_IEEE80211R_AP |
1780 | os_memset(sm->PMK, 0, sizeof(sm->PMK)); | |
1781 | sm->pmk_len = 0; | |
1782 | os_memset(sm->xxkey, 0, sizeof(sm->xxkey)); | |
1783 | sm->xxkey_len = 0; | |
8a576f5e JM |
1784 | os_memset(sm->pmk_r1, 0, sizeof(sm->pmk_r1)); |
1785 | sm->pmk_r1_len = 0; | |
09ab81b9 | 1786 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b JM |
1787 | break; |
1788 | case WPA_REAUTH: | |
1789 | case WPA_REAUTH_EAPOL: | |
3ab72b62 JM |
1790 | if (!sm->started) { |
1791 | /* | |
1792 | * When using WPS, we may end up here if the STA | |
1793 | * manages to re-associate without the previous STA | |
1794 | * entry getting removed. Consequently, we need to make | |
1795 | * sure that the WPA state machines gets initialized | |
1796 | * properly at this point. | |
1797 | */ | |
f83d3491 JM |
1798 | wpa_printf(MSG_DEBUG, |
1799 | "WPA state machine had not been started - initialize now"); | |
3ab72b62 JM |
1800 | sm->started = 1; |
1801 | sm->Init = TRUE; | |
1802 | if (wpa_sm_step(sm) == 1) | |
1803 | return 1; /* should not really happen */ | |
1804 | sm->Init = FALSE; | |
1805 | sm->AuthenticationRequest = TRUE; | |
1806 | break; | |
862aac1f AW |
1807 | } |
1808 | ||
1809 | if (!sm->use_ext_key_id && | |
1810 | sm->wpa_auth->conf.wpa_deny_ptk0_rekey) { | |
1a7963e3 AW |
1811 | wpa_printf(MSG_INFO, |
1812 | "WPA: PTK0 rekey not allowed, disconnect " | |
1813 | MACSTR, MAC2STR(sm->addr)); | |
1814 | sm->Disconnect = TRUE; | |
862aac1f | 1815 | /* Try to encourage the STA to reconnect */ |
1a7963e3 AW |
1816 | sm->disconnect_reason = |
1817 | WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA; | |
1818 | break; | |
3ab72b62 | 1819 | } |
862aac1f AW |
1820 | |
1821 | if (sm->use_ext_key_id) | |
1822 | sm->keyidx_active ^= 1; /* flip Key ID */ | |
1823 | ||
9663596f JM |
1824 | if (sm->GUpdateStationKeys) { |
1825 | /* | |
1826 | * Reauthentication cancels the pending group key | |
1827 | * update for this STA. | |
1828 | */ | |
1829 | sm->group->GKeyDoneStations--; | |
1830 | sm->GUpdateStationKeys = FALSE; | |
1831 | sm->PtkGroupInit = TRUE; | |
1832 | } | |
6fc6879b JM |
1833 | sm->ReAuthenticationRequest = TRUE; |
1834 | break; | |
1835 | case WPA_ASSOC_FT: | |
4ec1fd8e | 1836 | #ifdef CONFIG_IEEE80211R_AP |
f83d3491 JM |
1837 | wpa_printf(MSG_DEBUG, |
1838 | "FT: Retry PTK configuration after association"); | |
81a658d7 JM |
1839 | wpa_ft_install_ptk(sm); |
1840 | ||
6fc6879b JM |
1841 | /* Using FT protocol, not WPA auth state machine */ |
1842 | sm->ft_completed = 1; | |
d178ab0d | 1843 | wpa_auth_set_ptk_rekey_timer(sm); |
6f9b5d16 | 1844 | return 0; |
4ec1fd8e | 1845 | #else /* CONFIG_IEEE80211R_AP */ |
6fc6879b | 1846 | break; |
4ec1fd8e | 1847 | #endif /* CONFIG_IEEE80211R_AP */ |
957bff83 JM |
1848 | case WPA_ASSOC_FILS: |
1849 | #ifdef CONFIG_FILS | |
1850 | wpa_printf(MSG_DEBUG, | |
1851 | "FILS: TK configuration after association"); | |
1852 | fils_set_tk(sm); | |
1853 | sm->fils_completed = 1; | |
1854 | return 0; | |
1855 | #else /* CONFIG_FILS */ | |
1856 | break; | |
1857 | #endif /* CONFIG_FILS */ | |
0e3bd7ac MV |
1858 | case WPA_DRV_STA_REMOVED: |
1859 | sm->tk_already_set = FALSE; | |
1860 | return 0; | |
6fc6879b JM |
1861 | } |
1862 | ||
4ec1fd8e | 1863 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b | 1864 | sm->ft_completed = 0; |
4ec1fd8e | 1865 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b | 1866 | |
5d22a1d5 JM |
1867 | if (sm->mgmt_frame_prot && event == WPA_AUTH) |
1868 | remove_ptk = 0; | |
78815f3d | 1869 | #ifdef CONFIG_FILS |
da24c5aa JM |
1870 | if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) && |
1871 | (event == WPA_AUTH || event == WPA_ASSOC)) | |
78815f3d JM |
1872 | remove_ptk = 0; |
1873 | #endif /* CONFIG_FILS */ | |
6fc6879b | 1874 | |
5d22a1d5 JM |
1875 | if (remove_ptk) { |
1876 | sm->PTK_valid = FALSE; | |
1877 | os_memset(&sm->PTK, 0, sizeof(sm->PTK)); | |
1878 | ||
1879 | if (event != WPA_REAUTH_EAPOL) | |
1880 | wpa_remove_ptk(sm); | |
1881 | } | |
6fc6879b | 1882 | |
43f49c37 JM |
1883 | if (sm->in_step_loop) { |
1884 | /* | |
1885 | * wpa_sm_step() is already running - avoid recursive call to | |
1886 | * it by making the existing loop process the new update. | |
1887 | */ | |
1888 | sm->changed = TRUE; | |
1889 | return 0; | |
1890 | } | |
6f9b5d16 | 1891 | return wpa_sm_step(sm); |
6fc6879b JM |
1892 | } |
1893 | ||
1894 | ||
6fc6879b JM |
1895 | SM_STATE(WPA_PTK, INITIALIZE) |
1896 | { | |
1897 | SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk); | |
1898 | if (sm->Init) { | |
1899 | /* Init flag is not cleared here, so avoid busy | |
1900 | * loop by claiming nothing changed. */ | |
1901 | sm->changed = FALSE; | |
1902 | } | |
1903 | ||
1904 | sm->keycount = 0; | |
1905 | if (sm->GUpdateStationKeys) | |
1906 | sm->group->GKeyDoneStations--; | |
1907 | sm->GUpdateStationKeys = FALSE; | |
1908 | if (sm->wpa == WPA_VERSION_WPA) | |
1909 | sm->PInitAKeys = FALSE; | |
1910 | if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and | |
1911 | * Local AA > Remote AA)) */) { | |
1912 | sm->Pair = TRUE; | |
1913 | } | |
1914 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0); | |
1915 | wpa_remove_ptk(sm); | |
1916 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0); | |
1917 | sm->TimeoutCtr = 0; | |
a1ea1b45 | 1918 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) || |
567da5bb | 1919 | sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP || |
a1ea1b45 | 1920 | sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) { |
6fc6879b JM |
1921 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, |
1922 | WPA_EAPOL_authorized, 0); | |
1923 | } | |
1924 | } | |
1925 | ||
1926 | ||
1927 | SM_STATE(WPA_PTK, DISCONNECT) | |
1928 | { | |
567da5bb JM |
1929 | u16 reason = sm->disconnect_reason; |
1930 | ||
6fc6879b JM |
1931 | SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk); |
1932 | sm->Disconnect = FALSE; | |
567da5bb JM |
1933 | sm->disconnect_reason = 0; |
1934 | if (!reason) | |
1935 | reason = WLAN_REASON_PREV_AUTH_NOT_VALID; | |
1936 | wpa_sta_disconnect(sm->wpa_auth, sm->addr, reason); | |
6fc6879b JM |
1937 | } |
1938 | ||
1939 | ||
1940 | SM_STATE(WPA_PTK, DISCONNECTED) | |
1941 | { | |
1942 | SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk); | |
1943 | sm->DeauthenticationRequest = FALSE; | |
1944 | } | |
1945 | ||
1946 | ||
1947 | SM_STATE(WPA_PTK, AUTHENTICATION) | |
1948 | { | |
1949 | SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk); | |
1950 | os_memset(&sm->PTK, 0, sizeof(sm->PTK)); | |
1951 | sm->PTK_valid = FALSE; | |
1952 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto, | |
1953 | 1); | |
1954 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1); | |
1955 | sm->AuthenticationRequest = FALSE; | |
1956 | } | |
1957 | ||
1958 | ||
40d00d2b NC |
1959 | static void wpa_group_ensure_init(struct wpa_authenticator *wpa_auth, |
1960 | struct wpa_group *group) | |
1bdb7ab3 | 1961 | { |
40d00d2b NC |
1962 | if (group->first_sta_seen) |
1963 | return; | |
1bdb7ab3 JM |
1964 | /* |
1965 | * System has run bit further than at the time hostapd was started | |
1966 | * potentially very early during boot up. This provides better chances | |
1967 | * of collecting more randomness on embedded systems. Re-initialize the | |
1968 | * GMK and Counter here to improve their strength if there was not | |
1969 | * enough entropy available immediately after system startup. | |
1970 | */ | |
f83d3491 JM |
1971 | wpa_printf(MSG_DEBUG, |
1972 | "WPA: Re-initialize GMK/Counter on first station"); | |
08704cd8 | 1973 | if (random_pool_ready() != 1) { |
f83d3491 JM |
1974 | wpa_printf(MSG_INFO, |
1975 | "WPA: Not enough entropy in random pool to proceed - reject first 4-way handshake"); | |
08704cd8 | 1976 | group->reject_4way_hs_for_entropy = TRUE; |
40d00d2b NC |
1977 | } else { |
1978 | group->first_sta_seen = TRUE; | |
1979 | group->reject_4way_hs_for_entropy = FALSE; | |
08704cd8 | 1980 | } |
40d00d2b | 1981 | |
aac1efec JM |
1982 | if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0 || |
1983 | wpa_gtk_update(wpa_auth, group) < 0 || | |
1984 | wpa_group_config_group_keys(wpa_auth, group) < 0) { | |
1985 | wpa_printf(MSG_INFO, "WPA: GMK/GTK setup failed"); | |
1986 | group->first_sta_seen = FALSE; | |
1987 | group->reject_4way_hs_for_entropy = TRUE; | |
1988 | } | |
1bdb7ab3 JM |
1989 | } |
1990 | ||
1991 | ||
6fc6879b JM |
1992 | SM_STATE(WPA_PTK, AUTHENTICATION2) |
1993 | { | |
1994 | SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk); | |
1bdb7ab3 | 1995 | |
40d00d2b | 1996 | wpa_group_ensure_init(sm->wpa_auth, sm->group); |
65a32cdb | 1997 | sm->ReAuthenticationRequest = FALSE; |
1bdb7ab3 | 1998 | |
3825a19b JM |
1999 | /* |
2000 | * Definition of ANonce selection in IEEE Std 802.11i-2004 is somewhat | |
2001 | * ambiguous. The Authenticator state machine uses a counter that is | |
2002 | * incremented by one for each 4-way handshake. However, the security | |
2003 | * analysis of 4-way handshake points out that unpredictable nonces | |
2004 | * help in preventing precomputation attacks. Instead of the state | |
2005 | * machine definition, use an unpredictable nonce value here to provide | |
2006 | * stronger protection against potential precomputation attacks. | |
2007 | */ | |
2008 | if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) { | |
f83d3491 JM |
2009 | wpa_printf(MSG_ERROR, |
2010 | "WPA: Failed to get random data for ANonce."); | |
65a32cdb | 2011 | sm->Disconnect = TRUE; |
3825a19b JM |
2012 | return; |
2013 | } | |
bc8318ac JM |
2014 | wpa_hexdump(MSG_DEBUG, "WPA: Assign ANonce", sm->ANonce, |
2015 | WPA_NONCE_LEN); | |
6fc6879b JM |
2016 | /* IEEE 802.11i does not clear TimeoutCtr here, but this is more |
2017 | * logical place than INITIALIZE since AUTHENTICATION2 can be | |
2018 | * re-entered on ReAuthenticationRequest without going through | |
2019 | * INITIALIZE. */ | |
2020 | sm->TimeoutCtr = 0; | |
2021 | } | |
2022 | ||
2023 | ||
0adc9b28 JM |
2024 | static int wpa_auth_sm_ptk_update(struct wpa_state_machine *sm) |
2025 | { | |
2026 | if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) { | |
2027 | wpa_printf(MSG_ERROR, | |
2028 | "WPA: Failed to get random data for ANonce"); | |
2029 | sm->Disconnect = TRUE; | |
2030 | return -1; | |
2031 | } | |
2032 | wpa_hexdump(MSG_DEBUG, "WPA: Assign new ANonce", sm->ANonce, | |
2033 | WPA_NONCE_LEN); | |
2034 | sm->TimeoutCtr = 0; | |
2035 | return 0; | |
2036 | } | |
2037 | ||
2038 | ||
6fc6879b JM |
2039 | SM_STATE(WPA_PTK, INITPMK) |
2040 | { | |
2041 | u8 msk[2 * PMK_LEN]; | |
2042 | size_t len = 2 * PMK_LEN; | |
2043 | ||
2044 | SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk); | |
4ec1fd8e | 2045 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b | 2046 | sm->xxkey_len = 0; |
4ec1fd8e | 2047 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b JM |
2048 | if (sm->pmksa) { |
2049 | wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache"); | |
207976f0 JM |
2050 | os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len); |
2051 | sm->pmk_len = sm->pmksa->pmk_len; | |
567da5bb JM |
2052 | #ifdef CONFIG_DPP |
2053 | } else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP) { | |
2054 | wpa_printf(MSG_DEBUG, | |
2055 | "DPP: No PMKSA cache entry for STA - reject connection"); | |
2056 | sm->Disconnect = TRUE; | |
2057 | sm->disconnect_reason = WLAN_REASON_INVALID_PMKID; | |
2058 | return; | |
2059 | #endif /* CONFIG_DPP */ | |
6fc6879b | 2060 | } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) { |
207976f0 JM |
2061 | unsigned int pmk_len; |
2062 | ||
834c5d68 | 2063 | if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) |
207976f0 JM |
2064 | pmk_len = PMK_LEN_SUITE_B_192; |
2065 | else | |
2066 | pmk_len = PMK_LEN; | |
f83d3491 | 2067 | wpa_printf(MSG_DEBUG, |
7b156a3c JM |
2068 | "WPA: PMK from EAPOL state machine (MSK len=%zu PMK len=%u)", |
2069 | len, pmk_len); | |
207976f0 JM |
2070 | if (len < pmk_len) { |
2071 | wpa_printf(MSG_DEBUG, | |
7b156a3c JM |
2072 | "WPA: MSK not long enough (%zu) to create PMK (%u)", |
2073 | len, pmk_len); | |
207976f0 JM |
2074 | sm->Disconnect = TRUE; |
2075 | return; | |
2076 | } | |
2077 | os_memcpy(sm->PMK, msk, pmk_len); | |
2078 | sm->pmk_len = pmk_len; | |
4ec1fd8e | 2079 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b | 2080 | if (len >= 2 * PMK_LEN) { |
9f12271b JM |
2081 | if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) { |
2082 | os_memcpy(sm->xxkey, msk, SHA384_MAC_LEN); | |
2083 | sm->xxkey_len = SHA384_MAC_LEN; | |
2084 | } else { | |
2085 | os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN); | |
2086 | sm->xxkey_len = PMK_LEN; | |
2087 | } | |
6fc6879b | 2088 | } |
4ec1fd8e | 2089 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b | 2090 | } else { |
400de9b1 | 2091 | wpa_printf(MSG_DEBUG, "WPA: Could not get PMK, get_msk: %p", |
cef8fac0 | 2092 | sm->wpa_auth->cb->get_msk); |
1180dd66 JM |
2093 | sm->Disconnect = TRUE; |
2094 | return; | |
6fc6879b | 2095 | } |
31bc66e4 | 2096 | forced_memzero(msk, sizeof(msk)); |
6fc6879b JM |
2097 | |
2098 | sm->req_replay_counter_used = 0; | |
2099 | /* IEEE 802.11i does not set keyRun to FALSE, but not doing this | |
2100 | * will break reauthentication since EAPOL state machines may not be | |
2101 | * get into AUTHENTICATING state that clears keyRun before WPA state | |
2102 | * machine enters AUTHENTICATION2 state and goes immediately to INITPMK | |
2103 | * state and takes PMK from the previously used AAA Key. This will | |
2104 | * eventually fail in 4-Way Handshake because Supplicant uses PMK | |
2105 | * derived from the new AAA Key. Setting keyRun = FALSE here seems to | |
2106 | * be good workaround for this issue. */ | |
2107 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0); | |
2108 | } | |
2109 | ||
2110 | ||
2111 | SM_STATE(WPA_PTK, INITPSK) | |
2112 | { | |
2113 | const u8 *psk; | |
7a12edd1 JM |
2114 | size_t psk_len; |
2115 | ||
6fc6879b | 2116 | SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk); |
7a12edd1 | 2117 | psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr, NULL, |
dbfa691d | 2118 | &psk_len, NULL); |
6fc6879b | 2119 | if (psk) { |
7a12edd1 JM |
2120 | os_memcpy(sm->PMK, psk, psk_len); |
2121 | sm->pmk_len = psk_len; | |
4ec1fd8e | 2122 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b JM |
2123 | os_memcpy(sm->xxkey, psk, PMK_LEN); |
2124 | sm->xxkey_len = PMK_LEN; | |
4ec1fd8e | 2125 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b | 2126 | } |
e61fea6b JM |
2127 | #ifdef CONFIG_SAE |
2128 | if (wpa_auth_uses_sae(sm) && sm->pmksa) { | |
2129 | wpa_printf(MSG_DEBUG, "SAE: PMK from PMKSA cache"); | |
2130 | os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len); | |
2131 | sm->pmk_len = sm->pmksa->pmk_len; | |
6fe3f0f7 | 2132 | #ifdef CONFIG_IEEE80211R_AP |
2133 | os_memcpy(sm->xxkey, sm->pmksa->pmk, sm->pmksa->pmk_len); | |
2134 | sm->xxkey_len = sm->pmksa->pmk_len; | |
2135 | #endif /* CONFIG_IEEE80211R_AP */ | |
e61fea6b JM |
2136 | } |
2137 | #endif /* CONFIG_SAE */ | |
6fc6879b JM |
2138 | sm->req_replay_counter_used = 0; |
2139 | } | |
2140 | ||
2141 | ||
2142 | SM_STATE(WPA_PTK, PTKSTART) | |
2143 | { | |
2144 | u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL; | |
2145 | size_t pmkid_len = 0; | |
2146 | ||
2147 | SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk); | |
2148 | sm->PTKRequest = FALSE; | |
2149 | sm->TimeoutEvt = FALSE; | |
f23c5b17 | 2150 | sm->alt_snonce_valid = FALSE; |
bae61562 JM |
2151 | |
2152 | sm->TimeoutCtr++; | |
41f140d3 | 2153 | if (sm->TimeoutCtr > sm->wpa_auth->conf.wpa_pairwise_update_count) { |
bae61562 JM |
2154 | /* No point in sending the EAPOL-Key - we will disconnect |
2155 | * immediately following this. */ | |
2156 | return; | |
2157 | } | |
2158 | ||
6fc6879b JM |
2159 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, |
2160 | "sending 1/4 msg of 4-Way Handshake"); | |
2161 | /* | |
c6e1a9a0 JM |
2162 | * For infrastructure BSS cases, it is better for the AP not to include |
2163 | * the PMKID KDE in EAPOL-Key msg 1/4 since it could be used to initiate | |
2164 | * offline search for the passphrase/PSK without having to be able to | |
2165 | * capture a 4-way handshake from a STA that has access to the network. | |
2166 | * | |
2167 | * For IBSS cases, addition of PMKID KDE could be considered even with | |
2168 | * WPA2-PSK cases that use multiple PSKs, but only if there is a single | |
2169 | * possible PSK for this STA. However, this should not be done unless | |
2170 | * there is support for using that information on the supplicant side. | |
2171 | * The concern about exposing PMKID unnecessarily in infrastructure BSS | |
2172 | * cases would also apply here, but at least in the IBSS case, this | |
2173 | * would cover a potential real use case. | |
6fc6879b JM |
2174 | */ |
2175 | if (sm->wpa == WPA_VERSION_WPA2 && | |
e61fea6b | 2176 | (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) || |
d90f10fa | 2177 | (sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE && sm->pmksa) || |
e61fea6b | 2178 | wpa_key_mgmt_sae(sm->wpa_key_mgmt)) && |
a14896e8 | 2179 | sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN) { |
6fc6879b JM |
2180 | pmkid = buf; |
2181 | pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN; | |
2182 | pmkid[0] = WLAN_EID_VENDOR_SPECIFIC; | |
2183 | pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN; | |
2184 | RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID); | |
929a2ea5 | 2185 | if (sm->pmksa) { |
9d94e4bb JM |
2186 | wpa_hexdump(MSG_DEBUG, |
2187 | "RSN: Message 1/4 PMKID from PMKSA entry", | |
2188 | sm->pmksa->pmkid, PMKID_LEN); | |
6fc6879b JM |
2189 | os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN], |
2190 | sm->pmksa->pmkid, PMKID_LEN); | |
929a2ea5 JM |
2191 | } else if (wpa_key_mgmt_suite_b(sm->wpa_key_mgmt)) { |
2192 | /* No KCK available to derive PMKID */ | |
9d94e4bb JM |
2193 | wpa_printf(MSG_DEBUG, |
2194 | "RSN: No KCK available to derive PMKID for message 1/4"); | |
929a2ea5 | 2195 | pmkid = NULL; |
a40bd06e JM |
2196 | #ifdef CONFIG_FILS |
2197 | } else if (wpa_key_mgmt_fils(sm->wpa_key_mgmt)) { | |
2198 | if (sm->pmkid_set) { | |
2199 | wpa_hexdump(MSG_DEBUG, | |
2200 | "RSN: Message 1/4 PMKID from FILS/ERP", | |
2201 | sm->pmkid, PMKID_LEN); | |
2202 | os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN], | |
2203 | sm->pmkid, PMKID_LEN); | |
2204 | } else { | |
2205 | /* No PMKID available */ | |
2206 | wpa_printf(MSG_DEBUG, | |
2207 | "RSN: No FILS/ERP PMKID available for message 1/4"); | |
2208 | pmkid = NULL; | |
2209 | } | |
2210 | #endif /* CONFIG_FILS */ | |
fb1dee22 JM |
2211 | #ifdef CONFIG_IEEE80211R_AP |
2212 | } else if (wpa_key_mgmt_ft(sm->wpa_key_mgmt) && | |
2213 | sm->ft_completed) { | |
2214 | wpa_printf(MSG_DEBUG, | |
2215 | "FT: No PMKID in message 1/4 when using FT protocol"); | |
2216 | pmkid = NULL; | |
fb1dee22 | 2217 | #endif /* CONFIG_IEEE80211R_AP */ |
9d94e4bb JM |
2218 | #ifdef CONFIG_SAE |
2219 | } else if (wpa_key_mgmt_sae(sm->wpa_key_mgmt)) { | |
2220 | if (sm->pmkid_set) { | |
2221 | wpa_hexdump(MSG_DEBUG, | |
2222 | "RSN: Message 1/4 PMKID from SAE", | |
2223 | sm->pmkid, PMKID_LEN); | |
2224 | os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN], | |
2225 | sm->pmkid, PMKID_LEN); | |
2226 | } else { | |
2227 | /* No PMKID available */ | |
2228 | wpa_printf(MSG_DEBUG, | |
2229 | "RSN: No SAE PMKID available for message 1/4"); | |
2230 | pmkid = NULL; | |
2231 | } | |
2232 | #endif /* CONFIG_SAE */ | |
929a2ea5 | 2233 | } else { |
6fc6879b JM |
2234 | /* |
2235 | * Calculate PMKID since no PMKSA cache entry was | |
2236 | * available with pre-calculated PMKID. | |
2237 | */ | |
207976f0 | 2238 | rsn_pmkid(sm->PMK, sm->pmk_len, sm->wpa_auth->addr, |
56586197 | 2239 | sm->addr, &pmkid[2 + RSN_SELECTOR_LEN], |
41b81914 | 2240 | sm->wpa_key_mgmt); |
9d94e4bb JM |
2241 | wpa_hexdump(MSG_DEBUG, |
2242 | "RSN: Message 1/4 PMKID derived from PMK", | |
2243 | &pmkid[2 + RSN_SELECTOR_LEN], PMKID_LEN); | |
6fc6879b JM |
2244 | } |
2245 | } | |
307cfc32 MK |
2246 | if (!pmkid) |
2247 | pmkid_len = 0; | |
6fc6879b JM |
2248 | wpa_send_eapol(sm->wpa_auth, sm, |
2249 | WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL, | |
2250 | sm->ANonce, pmkid, pmkid_len, 0, 0); | |
6fc6879b JM |
2251 | } |
2252 | ||
2253 | ||
f23c5b17 | 2254 | static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce, |
207976f0 | 2255 | const u8 *pmk, unsigned int pmk_len, |
65a44e84 | 2256 | struct wpa_ptk *ptk, int force_sha256) |
6fc6879b | 2257 | { |
10ec6a5f JM |
2258 | const u8 *z = NULL; |
2259 | size_t z_len = 0; | |
65a44e84 | 2260 | int akmp; |
10ec6a5f | 2261 | |
4ec1fd8e | 2262 | #ifdef CONFIG_IEEE80211R_AP |
b583ed38 JM |
2263 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { |
2264 | if (sm->ft_completed) { | |
2265 | u8 ptk_name[WPA_PMK_NAME_LEN]; | |
2266 | ||
2267 | return wpa_pmk_r1_to_ptk(sm->pmk_r1, sm->pmk_r1_len, | |
2268 | sm->SNonce, sm->ANonce, | |
2269 | sm->addr, sm->wpa_auth->addr, | |
2270 | sm->pmk_r1_name, | |
2271 | ptk, ptk_name, | |
2272 | sm->wpa_key_mgmt, | |
2273 | sm->pairwise); | |
2274 | } | |
267c366f | 2275 | return wpa_auth_derive_ptk_ft(sm, ptk); |
b583ed38 | 2276 | } |
4ec1fd8e | 2277 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b | 2278 | |
10ec6a5f JM |
2279 | #ifdef CONFIG_DPP2 |
2280 | if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP && sm->dpp_z) { | |
2281 | z = wpabuf_head(sm->dpp_z); | |
2282 | z_len = wpabuf_len(sm->dpp_z); | |
2283 | } | |
2284 | #endif /* CONFIG_DPP2 */ | |
2285 | ||
65a44e84 JM |
2286 | akmp = sm->wpa_key_mgmt; |
2287 | if (force_sha256) | |
0a76a0b9 | 2288 | akmp |= WPA_KEY_MGMT_PSK_SHA256; |
207976f0 | 2289 | return wpa_pmk_to_ptk(pmk, pmk_len, "Pairwise key expansion", |
98cd3d1c | 2290 | sm->wpa_auth->addr, sm->addr, sm->ANonce, snonce, |
65a44e84 | 2291 | ptk, akmp, sm->pairwise, z, z_len); |
6fc6879b JM |
2292 | } |
2293 | ||
2294 | ||
3b5b7aa8 | 2295 | #ifdef CONFIG_FILS |
c4fd6d8a JM |
2296 | |
2297 | int fils_auth_pmk_to_ptk(struct wpa_state_machine *sm, const u8 *pmk, | |
80ddf5d9 | 2298 | size_t pmk_len, const u8 *snonce, const u8 *anonce, |
4cada9dc | 2299 | const u8 *dhss, size_t dhss_len, |
80ddf5d9 | 2300 | struct wpabuf *g_sta, struct wpabuf *g_ap) |
c4fd6d8a JM |
2301 | { |
2302 | u8 ick[FILS_ICK_MAX_LEN]; | |
2303 | size_t ick_len; | |
2304 | int res; | |
8fed47e0 JM |
2305 | u8 fils_ft[FILS_FT_MAX_LEN]; |
2306 | size_t fils_ft_len = 0; | |
c4fd6d8a JM |
2307 | |
2308 | res = fils_pmk_to_ptk(pmk, pmk_len, sm->addr, sm->wpa_auth->addr, | |
4cada9dc JM |
2309 | snonce, anonce, dhss, dhss_len, |
2310 | &sm->PTK, ick, &ick_len, | |
8fed47e0 JM |
2311 | sm->wpa_key_mgmt, sm->pairwise, |
2312 | fils_ft, &fils_ft_len); | |
c4fd6d8a JM |
2313 | if (res < 0) |
2314 | return res; | |
2315 | sm->PTK_valid = TRUE; | |
2f1357fb | 2316 | sm->tk_already_set = FALSE; |
c4fd6d8a | 2317 | |
8fed47e0 JM |
2318 | #ifdef CONFIG_IEEE80211R_AP |
2319 | if (fils_ft_len) { | |
2320 | struct wpa_authenticator *wpa_auth = sm->wpa_auth; | |
2321 | struct wpa_auth_config *conf = &wpa_auth->conf; | |
994eac7e JM |
2322 | u8 pmk_r0[PMK_LEN_MAX], pmk_r0_name[WPA_PMK_NAME_LEN]; |
2323 | int use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt); | |
2324 | size_t pmk_r0_len = use_sha384 ? SHA384_MAC_LEN : PMK_LEN; | |
8fed47e0 JM |
2325 | |
2326 | if (wpa_derive_pmk_r0(fils_ft, fils_ft_len, | |
2327 | conf->ssid, conf->ssid_len, | |
2328 | conf->mobility_domain, | |
2329 | conf->r0_key_holder, | |
2330 | conf->r0_key_holder_len, | |
994eac7e JM |
2331 | sm->addr, pmk_r0, pmk_r0_name, |
2332 | use_sha384) < 0) | |
8fed47e0 JM |
2333 | return -1; |
2334 | ||
994eac7e JM |
2335 | wpa_hexdump_key(MSG_DEBUG, "FILS+FT: PMK-R0", |
2336 | pmk_r0, pmk_r0_len); | |
8fed47e0 JM |
2337 | wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR0Name", |
2338 | pmk_r0_name, WPA_PMK_NAME_LEN); | |
89dea17e | 2339 | wpa_ft_store_pmk_fils(sm, pmk_r0, pmk_r0_name); |
31bc66e4 | 2340 | forced_memzero(fils_ft, sizeof(fils_ft)); |
36536639 JM |
2341 | |
2342 | res = wpa_derive_pmk_r1_name(pmk_r0_name, conf->r1_key_holder, | |
2343 | sm->addr, sm->pmk_r1_name, | |
2344 | use_sha384); | |
31bc66e4 | 2345 | forced_memzero(pmk_r0, PMK_LEN_MAX); |
36536639 JM |
2346 | if (res < 0) |
2347 | return -1; | |
2348 | wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR1Name", sm->pmk_r1_name, | |
2349 | WPA_PMK_NAME_LEN); | |
2350 | sm->pmk_r1_name_valid = 1; | |
8fed47e0 JM |
2351 | } |
2352 | #endif /* CONFIG_IEEE80211R_AP */ | |
2353 | ||
c4fd6d8a JM |
2354 | res = fils_key_auth_sk(ick, ick_len, snonce, anonce, |
2355 | sm->addr, sm->wpa_auth->addr, | |
80ddf5d9 JM |
2356 | g_sta ? wpabuf_head(g_sta) : NULL, |
2357 | g_sta ? wpabuf_len(g_sta) : 0, | |
2358 | g_ap ? wpabuf_head(g_ap) : NULL, | |
2359 | g_ap ? wpabuf_len(g_ap) : 0, | |
c4fd6d8a JM |
2360 | sm->wpa_key_mgmt, sm->fils_key_auth_sta, |
2361 | sm->fils_key_auth_ap, | |
2362 | &sm->fils_key_auth_len); | |
31bc66e4 | 2363 | forced_memzero(ick, sizeof(ick)); |
78815f3d JM |
2364 | |
2365 | /* Store nonces for (Re)Association Request/Response frame processing */ | |
2366 | os_memcpy(sm->SNonce, snonce, FILS_NONCE_LEN); | |
2367 | os_memcpy(sm->ANonce, anonce, FILS_NONCE_LEN); | |
2368 | ||
c4fd6d8a JM |
2369 | return res; |
2370 | } | |
2371 | ||
2372 | ||
3b5b7aa8 | 2373 | static int wpa_aead_decrypt(struct wpa_state_machine *sm, struct wpa_ptk *ptk, |
75c8563e | 2374 | u8 *buf, size_t buf_len, u16 *_key_data_len) |
3b5b7aa8 JM |
2375 | { |
2376 | struct ieee802_1x_hdr *hdr; | |
2377 | struct wpa_eapol_key *key; | |
2378 | u8 *pos; | |
2379 | u16 key_data_len; | |
2380 | u8 *tmp; | |
2381 | const u8 *aad[1]; | |
2382 | size_t aad_len[1]; | |
2383 | ||
75c8563e | 2384 | hdr = (struct ieee802_1x_hdr *) buf; |
3b5b7aa8 JM |
2385 | key = (struct wpa_eapol_key *) (hdr + 1); |
2386 | pos = (u8 *) (key + 1); | |
2387 | key_data_len = WPA_GET_BE16(pos); | |
2388 | if (key_data_len < AES_BLOCK_SIZE || | |
2389 | key_data_len > buf_len - sizeof(*hdr) - sizeof(*key) - 2) { | |
2390 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO, | |
2391 | "No room for AES-SIV data in the frame"); | |
2392 | return -1; | |
2393 | } | |
2394 | pos += 2; /* Pointing at the Encrypted Key Data field */ | |
2395 | ||
2396 | tmp = os_malloc(key_data_len); | |
2397 | if (!tmp) | |
2398 | return -1; | |
2399 | ||
2400 | /* AES-SIV AAD from EAPOL protocol version field (inclusive) to | |
2401 | * to Key Data (exclusive). */ | |
75c8563e JM |
2402 | aad[0] = buf; |
2403 | aad_len[0] = pos - buf; | |
3b5b7aa8 JM |
2404 | if (aes_siv_decrypt(ptk->kek, ptk->kek_len, pos, key_data_len, |
2405 | 1, aad, aad_len, tmp) < 0) { | |
2406 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO, | |
2407 | "Invalid AES-SIV data in the frame"); | |
2408 | bin_clear_free(tmp, key_data_len); | |
2409 | return -1; | |
2410 | } | |
2411 | ||
2412 | /* AEAD decryption and validation completed successfully */ | |
2413 | key_data_len -= AES_BLOCK_SIZE; | |
2414 | wpa_hexdump_key(MSG_DEBUG, "WPA: Decrypted Key Data", | |
2415 | tmp, key_data_len); | |
2416 | ||
2417 | /* Replace Key Data field with the decrypted version */ | |
2418 | os_memcpy(pos, tmp, key_data_len); | |
2419 | pos -= 2; /* Key Data Length field */ | |
2420 | WPA_PUT_BE16(pos, key_data_len); | |
2421 | bin_clear_free(tmp, key_data_len); | |
2422 | if (_key_data_len) | |
2423 | *_key_data_len = key_data_len; | |
2424 | return 0; | |
2425 | } | |
78815f3d JM |
2426 | |
2427 | ||
087631b9 JM |
2428 | const u8 * wpa_fils_validate_fils_session(struct wpa_state_machine *sm, |
2429 | const u8 *ies, size_t ies_len, | |
2430 | const u8 *fils_session) | |
2431 | { | |
2432 | const u8 *ie, *end; | |
2433 | const u8 *session = NULL; | |
2434 | ||
2435 | if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt)) { | |
2436 | wpa_printf(MSG_DEBUG, | |
2437 | "FILS: Not a FILS AKM - reject association"); | |
2438 | return NULL; | |
2439 | } | |
2440 | ||
2441 | /* Verify Session element */ | |
2442 | ie = ies; | |
2443 | end = ((const u8 *) ie) + ies_len; | |
2444 | while (ie + 1 < end) { | |
2445 | if (ie + 2 + ie[1] > end) | |
2446 | break; | |
2447 | if (ie[0] == WLAN_EID_EXTENSION && | |
2448 | ie[1] >= 1 + FILS_SESSION_LEN && | |
2449 | ie[2] == WLAN_EID_EXT_FILS_SESSION) { | |
2450 | session = ie; | |
2451 | break; | |
2452 | } | |
2453 | ie += 2 + ie[1]; | |
2454 | } | |
2455 | ||
2456 | if (!session) { | |
2457 | wpa_printf(MSG_DEBUG, | |
2458 | "FILS: %s: Could not find FILS Session element in Assoc Req - reject", | |
2459 | __func__); | |
2460 | return NULL; | |
2461 | } | |
2462 | ||
2463 | if (!fils_session) { | |
2464 | wpa_printf(MSG_DEBUG, | |
2465 | "FILS: %s: Could not find FILS Session element in STA entry - reject", | |
2466 | __func__); | |
2467 | return NULL; | |
2468 | } | |
2469 | ||
2470 | if (os_memcmp(fils_session, session + 3, FILS_SESSION_LEN) != 0) { | |
2471 | wpa_printf(MSG_DEBUG, "FILS: Session mismatch"); | |
2472 | wpa_hexdump(MSG_DEBUG, "FILS: Expected FILS Session", | |
2473 | fils_session, FILS_SESSION_LEN); | |
2474 | wpa_hexdump(MSG_DEBUG, "FILS: Received FILS Session", | |
2475 | session + 3, FILS_SESSION_LEN); | |
2476 | return NULL; | |
2477 | } | |
2478 | return session; | |
2479 | } | |
2480 | ||
2481 | ||
bd599353 JM |
2482 | int wpa_fils_validate_key_confirm(struct wpa_state_machine *sm, const u8 *ies, |
2483 | size_t ies_len) | |
2484 | { | |
2485 | struct ieee802_11_elems elems; | |
2486 | ||
2487 | if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) { | |
2488 | wpa_printf(MSG_DEBUG, | |
2489 | "FILS: Failed to parse decrypted elements"); | |
2490 | return -1; | |
2491 | } | |
2492 | ||
8b5ddda5 JM |
2493 | if (!elems.fils_session) { |
2494 | wpa_printf(MSG_DEBUG, "FILS: No FILS Session element"); | |
2495 | return -1; | |
2496 | } | |
2497 | ||
bd599353 JM |
2498 | if (!elems.fils_key_confirm) { |
2499 | wpa_printf(MSG_DEBUG, "FILS: No FILS Key Confirm element"); | |
2500 | return -1; | |
2501 | } | |
2502 | ||
2503 | if (elems.fils_key_confirm_len != sm->fils_key_auth_len) { | |
2504 | wpa_printf(MSG_DEBUG, | |
7b156a3c | 2505 | "FILS: Unexpected Key-Auth length %d (expected %zu)", |
bd599353 | 2506 | elems.fils_key_confirm_len, |
7b156a3c | 2507 | sm->fils_key_auth_len); |
bd599353 JM |
2508 | return -1; |
2509 | } | |
2510 | ||
2511 | if (os_memcmp(elems.fils_key_confirm, sm->fils_key_auth_sta, | |
2512 | sm->fils_key_auth_len) != 0) { | |
2513 | wpa_printf(MSG_DEBUG, "FILS: Key-Auth mismatch"); | |
2514 | wpa_hexdump(MSG_DEBUG, "FILS: Received Key-Auth", | |
2515 | elems.fils_key_confirm, elems.fils_key_confirm_len); | |
2516 | wpa_hexdump(MSG_DEBUG, "FILS: Expected Key-Auth", | |
2517 | sm->fils_key_auth_sta, sm->fils_key_auth_len); | |
2518 | return -1; | |
2519 | } | |
2520 | ||
2521 | return 0; | |
2522 | } | |
2523 | ||
2524 | ||
78815f3d JM |
2525 | int fils_decrypt_assoc(struct wpa_state_machine *sm, const u8 *fils_session, |
2526 | const struct ieee80211_mgmt *mgmt, size_t frame_len, | |
2527 | u8 *pos, size_t left) | |
2528 | { | |
2529 | u16 fc, stype; | |
2530 | const u8 *end, *ie_start, *ie, *session, *crypt; | |
78815f3d JM |
2531 | const u8 *aad[5]; |
2532 | size_t aad_len[5]; | |
2533 | ||
2534 | if (!sm || !sm->PTK_valid) { | |
2535 | wpa_printf(MSG_DEBUG, | |
2536 | "FILS: No KEK to decrypt Assocication Request frame"); | |
2537 | return -1; | |
2538 | } | |
2539 | ||
2540 | if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt)) { | |
2541 | wpa_printf(MSG_DEBUG, | |
2542 | "FILS: Not a FILS AKM - reject association"); | |
2543 | return -1; | |
2544 | } | |
2545 | ||
2546 | end = ((const u8 *) mgmt) + frame_len; | |
2547 | fc = le_to_host16(mgmt->frame_control); | |
2548 | stype = WLAN_FC_GET_STYPE(fc); | |
2549 | if (stype == WLAN_FC_STYPE_REASSOC_REQ) | |
2550 | ie_start = mgmt->u.reassoc_req.variable; | |
2551 | else | |
2552 | ie_start = mgmt->u.assoc_req.variable; | |
2553 | ie = ie_start; | |
2554 | ||
2555 | /* | |
2556 | * Find FILS Session element which is the last unencrypted element in | |
2557 | * the frame. | |
2558 | */ | |
087631b9 JM |
2559 | session = wpa_fils_validate_fils_session(sm, ie, end - ie, |
2560 | fils_session); | |
78815f3d | 2561 | if (!session) { |
087631b9 | 2562 | wpa_printf(MSG_DEBUG, "FILS: Session validation failed"); |
78815f3d JM |
2563 | return -1; |
2564 | } | |
087631b9 | 2565 | |
78815f3d JM |
2566 | crypt = session + 2 + session[1]; |
2567 | ||
2568 | if (end - crypt < AES_BLOCK_SIZE) { | |
2569 | wpa_printf(MSG_DEBUG, | |
2570 | "FILS: Too short frame to include AES-SIV data"); | |
2571 | return -1; | |
2572 | } | |
2573 | ||
2574 | /* AES-SIV AAD vectors */ | |
2575 | ||
2576 | /* The STA's MAC address */ | |
2577 | aad[0] = mgmt->sa; | |
2578 | aad_len[0] = ETH_ALEN; | |
2579 | /* The AP's BSSID */ | |
2580 | aad[1] = mgmt->da; | |
2581 | aad_len[1] = ETH_ALEN; | |
2582 | /* The STA's nonce */ | |
2583 | aad[2] = sm->SNonce; | |
2584 | aad_len[2] = FILS_NONCE_LEN; | |
2585 | /* The AP's nonce */ | |
2586 | aad[3] = sm->ANonce; | |
2587 | aad_len[3] = FILS_NONCE_LEN; | |
2588 | /* | |
2589 | * The (Re)Association Request frame from the Capability Information | |
2590 | * field to the FILS Session element (both inclusive). | |
2591 | */ | |
2592 | aad[4] = (const u8 *) &mgmt->u.assoc_req.capab_info; | |
d77f3304 | 2593 | aad_len[4] = crypt - aad[4]; |
78815f3d JM |
2594 | |
2595 | if (aes_siv_decrypt(sm->PTK.kek, sm->PTK.kek_len, crypt, end - crypt, | |
d77f3304 | 2596 | 5, aad, aad_len, pos + (crypt - ie_start)) < 0) { |
78815f3d JM |
2597 | wpa_printf(MSG_DEBUG, |
2598 | "FILS: Invalid AES-SIV data in the frame"); | |
2599 | return -1; | |
2600 | } | |
2601 | wpa_hexdump(MSG_DEBUG, "FILS: Decrypted Association Request elements", | |
2602 | pos, left - AES_BLOCK_SIZE); | |
2603 | ||
bd599353 JM |
2604 | if (wpa_fils_validate_key_confirm(sm, pos, left - AES_BLOCK_SIZE) < 0) { |
2605 | wpa_printf(MSG_DEBUG, "FILS: Key Confirm validation failed"); | |
78815f3d JM |
2606 | return -1; |
2607 | } | |
2608 | ||
2609 | return left - AES_BLOCK_SIZE; | |
2610 | } | |
2611 | ||
e73ffa09 JM |
2612 | |
2613 | int fils_encrypt_assoc(struct wpa_state_machine *sm, u8 *buf, | |
91d91abf JM |
2614 | size_t current_len, size_t max_len, |
2615 | const struct wpabuf *hlp) | |
e73ffa09 JM |
2616 | { |
2617 | u8 *end = buf + max_len; | |
2618 | u8 *pos = buf + current_len; | |
2619 | struct ieee80211_mgmt *mgmt; | |
2620 | struct wpabuf *plain; | |
e73ffa09 JM |
2621 | const u8 *aad[5]; |
2622 | size_t aad_len[5]; | |
2623 | ||
2624 | if (!sm || !sm->PTK_valid) | |
2625 | return -1; | |
2626 | ||
2627 | wpa_hexdump(MSG_DEBUG, | |
2628 | "FILS: Association Response frame before FILS processing", | |
2629 | buf, current_len); | |
2630 | ||
2631 | mgmt = (struct ieee80211_mgmt *) buf; | |
2632 | ||
2633 | /* AES-SIV AAD vectors */ | |
2634 | ||
2635 | /* The AP's BSSID */ | |
2636 | aad[0] = mgmt->sa; | |
2637 | aad_len[0] = ETH_ALEN; | |
2638 | /* The STA's MAC address */ | |
2639 | aad[1] = mgmt->da; | |
2640 | aad_len[1] = ETH_ALEN; | |
2641 | /* The AP's nonce */ | |
2642 | aad[2] = sm->ANonce; | |
2643 | aad_len[2] = FILS_NONCE_LEN; | |
2644 | /* The STA's nonce */ | |
2645 | aad[3] = sm->SNonce; | |
2646 | aad_len[3] = FILS_NONCE_LEN; | |
2647 | /* | |
2648 | * The (Re)Association Response frame from the Capability Information | |
2649 | * field (the same offset in both Association and Reassociation | |
2650 | * Response frames) to the FILS Session element (both inclusive). | |
2651 | */ | |
2652 | aad[4] = (const u8 *) &mgmt->u.assoc_resp.capab_info; | |
2653 | aad_len[4] = pos - aad[4]; | |
2654 | ||
2655 | /* The following elements will be encrypted with AES-SIV */ | |
9392859d JM |
2656 | plain = fils_prepare_plainbuf(sm, hlp); |
2657 | if (!plain) { | |
2658 | wpa_printf(MSG_DEBUG, "FILS: Plain buffer prep failed"); | |
2659 | return -1; | |
2660 | } | |
2661 | ||
2662 | if (pos + wpabuf_len(plain) + AES_BLOCK_SIZE > end) { | |
2663 | wpa_printf(MSG_DEBUG, | |
2664 | "FILS: Not enough room for FILS elements"); | |
ce362f88 | 2665 | wpabuf_clear_free(plain); |
9392859d JM |
2666 | return -1; |
2667 | } | |
2668 | ||
2669 | wpa_hexdump_buf_key(MSG_DEBUG, "FILS: Association Response plaintext", | |
2670 | plain); | |
2671 | ||
2672 | if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len, | |
2673 | wpabuf_head(plain), wpabuf_len(plain), | |
2674 | 5, aad, aad_len, pos) < 0) { | |
ce362f88 | 2675 | wpabuf_clear_free(plain); |
9392859d JM |
2676 | return -1; |
2677 | } | |
2678 | ||
2679 | wpa_hexdump(MSG_DEBUG, | |
2680 | "FILS: Encrypted Association Response elements", | |
2681 | pos, AES_BLOCK_SIZE + wpabuf_len(plain)); | |
2682 | current_len += wpabuf_len(plain) + AES_BLOCK_SIZE; | |
ce362f88 | 2683 | wpabuf_clear_free(plain); |
9392859d JM |
2684 | |
2685 | sm->fils_completed = 1; | |
2686 | ||
2687 | return current_len; | |
2688 | } | |
2689 | ||
2690 | ||
2691 | static struct wpabuf * fils_prepare_plainbuf(struct wpa_state_machine *sm, | |
2692 | const struct wpabuf *hlp) | |
2693 | { | |
2694 | struct wpabuf *plain; | |
2695 | u8 *len, *tmp, *tmp2; | |
2696 | u8 hdr[2]; | |
2697 | u8 *gtk, dummy_gtk[32]; | |
2698 | size_t gtk_len; | |
2699 | struct wpa_group *gsm; | |
82cc0b0c JM |
2700 | size_t plain_len; |
2701 | struct wpa_auth_config *conf = &sm->wpa_auth->conf; | |
e73ffa09 | 2702 | |
82cc0b0c JM |
2703 | plain_len = 1000 + ieee80211w_kde_len(sm); |
2704 | if (conf->transition_disable) | |
2705 | plain_len += 2 + RSN_SELECTOR_LEN + 1; | |
2706 | plain = wpabuf_alloc(plain_len); | |
e73ffa09 | 2707 | if (!plain) |
9392859d | 2708 | return NULL; |
e73ffa09 JM |
2709 | |
2710 | /* TODO: FILS Public Key */ | |
2711 | ||
2712 | /* FILS Key Confirmation */ | |
2713 | wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */ | |
2714 | wpabuf_put_u8(plain, 1 + sm->fils_key_auth_len); /* Length */ | |
2715 | /* Element ID Extension */ | |
2716 | wpabuf_put_u8(plain, WLAN_EID_EXT_FILS_KEY_CONFIRM); | |
2717 | wpabuf_put_data(plain, sm->fils_key_auth_ap, sm->fils_key_auth_len); | |
2718 | ||
91d91abf JM |
2719 | /* FILS HLP Container */ |
2720 | if (hlp) | |
2721 | wpabuf_put_buf(plain, hlp); | |
e73ffa09 JM |
2722 | |
2723 | /* TODO: FILS IP Address Assignment */ | |
2724 | ||
2725 | /* Key Delivery */ | |
2726 | gsm = sm->group; | |
2727 | wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */ | |
2728 | len = wpabuf_put(plain, 1); | |
2729 | wpabuf_put_u8(plain, WLAN_EID_EXT_KEY_DELIVERY); | |
2730 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, | |
2731 | wpabuf_put(plain, WPA_KEY_RSC_LEN)); | |
2732 | /* GTK KDE */ | |
2733 | gtk = gsm->GTK[gsm->GN - 1]; | |
2734 | gtk_len = gsm->GTK_len; | |
62e12afc | 2735 | if (conf->disable_gtk || sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) { |
e73ffa09 JM |
2736 | /* |
2737 | * Provide unique random GTK to each STA to prevent use | |
2738 | * of GTK in the BSS. | |
2739 | */ | |
2740 | if (random_get_bytes(dummy_gtk, gtk_len) < 0) { | |
ce362f88 | 2741 | wpabuf_clear_free(plain); |
9392859d | 2742 | return NULL; |
e73ffa09 JM |
2743 | } |
2744 | gtk = dummy_gtk; | |
2745 | } | |
2746 | hdr[0] = gsm->GN & 0x03; | |
2747 | hdr[1] = 0; | |
2748 | tmp = wpabuf_put(plain, 0); | |
2749 | tmp2 = wpa_add_kde(tmp, RSN_KEY_DATA_GROUPKEY, hdr, 2, | |
2750 | gtk, gtk_len); | |
2751 | wpabuf_put(plain, tmp2 - tmp); | |
2752 | ||
16889aff | 2753 | /* IGTK KDE and BIGTK KDE */ |
e73ffa09 JM |
2754 | tmp = wpabuf_put(plain, 0); |
2755 | tmp2 = ieee80211w_kde_add(sm, tmp); | |
2756 | wpabuf_put(plain, tmp2 - tmp); | |
2757 | ||
82cc0b0c JM |
2758 | if (conf->transition_disable) { |
2759 | tmp = wpabuf_put(plain, 0); | |
2760 | tmp2 = wpa_add_kde(tmp, WFA_KEY_DATA_TRANSITION_DISABLE, | |
2761 | &conf->transition_disable, 1, NULL, 0); | |
2762 | wpabuf_put(plain, tmp2 - tmp); | |
2763 | } | |
2764 | ||
e73ffa09 | 2765 | *len = (u8 *) wpabuf_put(plain, 0) - len - 1; |
99621dc1 MV |
2766 | |
2767 | #ifdef CONFIG_OCV | |
2768 | if (wpa_auth_uses_ocv(sm)) { | |
2769 | struct wpa_channel_info ci; | |
2770 | u8 *pos; | |
2771 | ||
2772 | if (wpa_channel_info(sm->wpa_auth, &ci) != 0) { | |
2773 | wpa_printf(MSG_WARNING, | |
2774 | "FILS: Failed to get channel info for OCI element"); | |
ce362f88 | 2775 | wpabuf_clear_free(plain); |
99621dc1 MV |
2776 | return NULL; |
2777 | } | |
2778 | ||
2779 | pos = wpabuf_put(plain, OCV_OCI_EXTENDED_LEN); | |
2780 | if (ocv_insert_extended_oci(&ci, pos) < 0) { | |
ce362f88 | 2781 | wpabuf_clear_free(plain); |
99621dc1 MV |
2782 | return NULL; |
2783 | } | |
2784 | } | |
2785 | #endif /* CONFIG_OCV */ | |
2786 | ||
9392859d | 2787 | return plain; |
e73ffa09 JM |
2788 | } |
2789 | ||
da24c5aa JM |
2790 | |
2791 | int fils_set_tk(struct wpa_state_machine *sm) | |
2792 | { | |
2793 | enum wpa_alg alg; | |
2794 | int klen; | |
2795 | ||
2f1357fb JM |
2796 | if (!sm || !sm->PTK_valid) { |
2797 | wpa_printf(MSG_DEBUG, "FILS: No valid PTK available to set TK"); | |
2798 | return -1; | |
2799 | } | |
2800 | if (sm->tk_already_set) { | |
2801 | wpa_printf(MSG_DEBUG, "FILS: TK already set to the driver"); | |
da24c5aa | 2802 | return -1; |
2f1357fb | 2803 | } |
da24c5aa JM |
2804 | |
2805 | alg = wpa_cipher_to_alg(sm->pairwise); | |
2806 | klen = wpa_cipher_key_len(sm->pairwise); | |
2807 | ||
2808 | wpa_printf(MSG_DEBUG, "FILS: Configure TK to the driver"); | |
2809 | if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0, | |
a919a260 | 2810 | sm->PTK.tk, klen, KEY_FLAG_PAIRWISE_RX_TX)) { |
da24c5aa JM |
2811 | wpa_printf(MSG_DEBUG, "FILS: Failed to set TK to the driver"); |
2812 | return -1; | |
2813 | } | |
2f1357fb | 2814 | sm->tk_already_set = TRUE; |
da24c5aa JM |
2815 | |
2816 | return 0; | |
2817 | } | |
2818 | ||
fa61bff6 JM |
2819 | |
2820 | u8 * hostapd_eid_assoc_fils_session(struct wpa_state_machine *sm, u8 *buf, | |
8b5ddda5 | 2821 | const u8 *fils_session, struct wpabuf *hlp) |
fa61bff6 JM |
2822 | { |
2823 | struct wpabuf *plain; | |
2824 | u8 *pos = buf; | |
2825 | ||
2826 | /* FILS Session */ | |
2827 | *pos++ = WLAN_EID_EXTENSION; /* Element ID */ | |
2828 | *pos++ = 1 + FILS_SESSION_LEN; /* Length */ | |
2829 | *pos++ = WLAN_EID_EXT_FILS_SESSION; /* Element ID Extension */ | |
2830 | os_memcpy(pos, fils_session, FILS_SESSION_LEN); | |
2831 | pos += FILS_SESSION_LEN; | |
2832 | ||
8b5ddda5 | 2833 | plain = fils_prepare_plainbuf(sm, hlp); |
fa61bff6 JM |
2834 | if (!plain) { |
2835 | wpa_printf(MSG_DEBUG, "FILS: Plain buffer prep failed"); | |
2836 | return NULL; | |
2837 | } | |
2838 | ||
2839 | os_memcpy(pos, wpabuf_head(plain), wpabuf_len(plain)); | |
2840 | pos += wpabuf_len(plain); | |
2841 | ||
7b156a3c JM |
2842 | wpa_printf(MSG_DEBUG, "%s: plain buf_len: %zu", __func__, |
2843 | wpabuf_len(plain)); | |
ce362f88 | 2844 | wpabuf_clear_free(plain); |
fa61bff6 JM |
2845 | sm->fils_completed = 1; |
2846 | return pos; | |
2847 | } | |
2848 | ||
3b5b7aa8 JM |
2849 | #endif /* CONFIG_FILS */ |
2850 | ||
2851 | ||
1034f67b MV |
2852 | #ifdef CONFIG_OCV |
2853 | int get_sta_tx_parameters(struct wpa_state_machine *sm, int ap_max_chanwidth, | |
2854 | int ap_seg1_idx, int *bandwidth, int *seg1_idx) | |
2855 | { | |
2856 | struct wpa_authenticator *wpa_auth = sm->wpa_auth; | |
2857 | ||
2858 | if (!wpa_auth->cb->get_sta_tx_params) | |
2859 | return -1; | |
2860 | return wpa_auth->cb->get_sta_tx_params(wpa_auth->cb_ctx, sm->addr, | |
2861 | ap_max_chanwidth, ap_seg1_idx, | |
2862 | bandwidth, seg1_idx); | |
2863 | } | |
2864 | #endif /* CONFIG_OCV */ | |
2865 | ||
2866 | ||
6fc6879b JM |
2867 | SM_STATE(WPA_PTK, PTKCALCNEGOTIATING) |
2868 | { | |
3b5b7aa8 | 2869 | struct wpa_authenticator *wpa_auth = sm->wpa_auth; |
6fc6879b | 2870 | struct wpa_ptk PTK; |
2c502460 | 2871 | int ok = 0, psk_found = 0; |
6fc6879b | 2872 | const u8 *pmk = NULL; |
7a12edd1 | 2873 | size_t pmk_len; |
3b5b7aa8 JM |
2874 | int ft; |
2875 | const u8 *eapol_key_ie, *key_data, *mic; | |
2876 | u16 key_data_length; | |
2877 | size_t mic_len, eapol_key_ie_len; | |
2878 | struct ieee802_1x_hdr *hdr; | |
2879 | struct wpa_eapol_key *key; | |
2880 | struct wpa_eapol_ie_parse kde; | |
bb05d036 | 2881 | int vlan_id = 0; |
65a44e84 | 2882 | int owe_ptk_workaround = !!wpa_auth->conf.owe_ptk_workaround; |
6fc6879b JM |
2883 | |
2884 | SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk); | |
2885 | sm->EAPOLKeyReceived = FALSE; | |
68921e24 | 2886 | sm->update_snonce = FALSE; |
b729fd8d | 2887 | os_memset(&PTK, 0, sizeof(PTK)); |
6fc6879b | 2888 | |
567da5bb | 2889 | mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len); |
3b5b7aa8 | 2890 | |
6fc6879b JM |
2891 | /* WPA with IEEE 802.1X: use the derived PMK from EAP |
2892 | * WPA-PSK: iterate through possible PSKs and select the one matching | |
2893 | * the packet */ | |
2894 | for (;;) { | |
e61fea6b JM |
2895 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) && |
2896 | !wpa_key_mgmt_sae(sm->wpa_key_mgmt)) { | |
759fd76b | 2897 | pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, |
dbfa691d JM |
2898 | sm->p2p_dev_addr, pmk, &pmk_len, |
2899 | &vlan_id); | |
9385f03f | 2900 | if (!pmk) |
6fc6879b | 2901 | break; |
2c502460 | 2902 | psk_found = 1; |
f9854c18 MK |
2903 | #ifdef CONFIG_IEEE80211R_AP |
2904 | if (wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt)) { | |
2905 | os_memcpy(sm->xxkey, pmk, pmk_len); | |
2906 | sm->xxkey_len = pmk_len; | |
2907 | } | |
2908 | #endif /* CONFIG_IEEE80211R_AP */ | |
207976f0 | 2909 | } else { |
6fc6879b | 2910 | pmk = sm->PMK; |
207976f0 JM |
2911 | pmk_len = sm->pmk_len; |
2912 | } | |
6fc6879b | 2913 | |
a40bd06e JM |
2914 | if ((!pmk || !pmk_len) && sm->pmksa) { |
2915 | wpa_printf(MSG_DEBUG, "WPA: Use PMK from PMKSA cache"); | |
2916 | pmk = sm->pmksa->pmk; | |
2917 | pmk_len = sm->pmksa->pmk_len; | |
2918 | } | |
2919 | ||
65a44e84 JM |
2920 | if (wpa_derive_ptk(sm, sm->SNonce, pmk, pmk_len, &PTK, |
2921 | owe_ptk_workaround == 2) < 0) | |
364c064a | 2922 | break; |
6fc6879b | 2923 | |
3b5b7aa8 | 2924 | if (mic_len && |
567da5bb | 2925 | wpa_verify_key_mic(sm->wpa_key_mgmt, pmk_len, &PTK, |
929a2ea5 | 2926 | sm->last_rx_eapol_key, |
6fc6879b | 2927 | sm->last_rx_eapol_key_len) == 0) { |
08dc8efd JM |
2928 | if (sm->PMK != pmk) { |
2929 | os_memcpy(sm->PMK, pmk, pmk_len); | |
2930 | sm->pmk_len = pmk_len; | |
2931 | } | |
6fc6879b JM |
2932 | ok = 1; |
2933 | break; | |
2934 | } | |
2935 | ||
3b5b7aa8 | 2936 | #ifdef CONFIG_FILS |
75c8563e JM |
2937 | if (!mic_len && |
2938 | wpa_aead_decrypt(sm, &PTK, sm->last_rx_eapol_key, | |
2939 | sm->last_rx_eapol_key_len, NULL) == 0) { | |
3b5b7aa8 JM |
2940 | ok = 1; |
2941 | break; | |
2942 | } | |
2943 | #endif /* CONFIG_FILS */ | |
2944 | ||
65a44e84 JM |
2945 | #ifdef CONFIG_OWE |
2946 | if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE && pmk_len > 32 && | |
2947 | owe_ptk_workaround == 1) { | |
2948 | wpa_printf(MSG_DEBUG, | |
2949 | "OWE: Try PTK derivation workaround with SHA256"); | |
2950 | owe_ptk_workaround = 2; | |
2951 | continue; | |
2952 | } | |
2953 | #endif /* CONFIG_OWE */ | |
2954 | ||
f5e0a332 JM |
2955 | if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) || |
2956 | wpa_key_mgmt_sae(sm->wpa_key_mgmt)) | |
6fc6879b JM |
2957 | break; |
2958 | } | |
2959 | ||
2960 | if (!ok) { | |
2961 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
2962 | "invalid MIC in msg 2/4 of 4-Way Handshake"); | |
2c502460 JM |
2963 | if (psk_found) |
2964 | wpa_auth_psk_failure_report(sm->wpa_auth, sm->addr); | |
6fc6879b JM |
2965 | return; |
2966 | } | |
2967 | ||
3b5b7aa8 JM |
2968 | /* |
2969 | * Note: last_rx_eapol_key length fields have already been validated in | |
2970 | * wpa_receive(). | |
2971 | */ | |
2972 | hdr = (struct ieee802_1x_hdr *) sm->last_rx_eapol_key; | |
2973 | key = (struct wpa_eapol_key *) (hdr + 1); | |
2974 | mic = (u8 *) (key + 1); | |
2975 | key_data = mic + mic_len + 2; | |
2976 | key_data_length = WPA_GET_BE16(mic + mic_len); | |
2977 | if (key_data_length > sm->last_rx_eapol_key_len - sizeof(*hdr) - | |
2978 | sizeof(*key) - mic_len - 2) | |
2979 | return; | |
2980 | ||
2981 | if (wpa_parse_kde_ies(key_data, key_data_length, &kde) < 0) { | |
2982 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
2983 | "received EAPOL-Key msg 2/4 with invalid Key Data contents"); | |
2984 | return; | |
2985 | } | |
2986 | if (kde.rsn_ie) { | |
2987 | eapol_key_ie = kde.rsn_ie; | |
2988 | eapol_key_ie_len = kde.rsn_ie_len; | |
2989 | } else if (kde.osen) { | |
2990 | eapol_key_ie = kde.osen; | |
2991 | eapol_key_ie_len = kde.osen_len; | |
2992 | } else { | |
2993 | eapol_key_ie = kde.wpa_ie; | |
2994 | eapol_key_ie_len = kde.wpa_ie_len; | |
2995 | } | |
2996 | ft = sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt); | |
9385f03f | 2997 | if (!sm->wpa_ie || |
3b5b7aa8 JM |
2998 | wpa_compare_rsn_ie(ft, sm->wpa_ie, sm->wpa_ie_len, |
2999 | eapol_key_ie, eapol_key_ie_len)) { | |
3000 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
3001 | "WPA IE from (Re)AssocReq did not match with msg 2/4"); | |
3002 | if (sm->wpa_ie) { | |
3003 | wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq", | |
3004 | sm->wpa_ie, sm->wpa_ie_len); | |
3005 | } | |
3006 | wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4", | |
3007 | eapol_key_ie, eapol_key_ie_len); | |
3008 | /* MLME-DEAUTHENTICATE.request */ | |
567da5bb JM |
3009 | wpa_sta_disconnect(wpa_auth, sm->addr, |
3010 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
3b5b7aa8 | 3011 | return; |
74866f53 JM |
3012 | } |
3013 | if ((!sm->rsnxe && kde.rsnxe) || | |
3014 | (sm->rsnxe && !kde.rsnxe) || | |
3015 | (sm->rsnxe && kde.rsnxe && | |
3016 | (sm->rsnxe_len != kde.rsnxe_len || | |
3017 | os_memcmp(sm->rsnxe, kde.rsnxe, sm->rsnxe_len) != 0))) { | |
3018 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
3019 | "RSNXE from (Re)AssocReq did not match the one in EAPOL-Key msg 2/4"); | |
3020 | wpa_hexdump(MSG_DEBUG, "RSNXE in AssocReq", | |
3021 | sm->rsnxe, sm->rsnxe_len); | |
3022 | wpa_hexdump(MSG_DEBUG, "RSNXE in EAPOL-Key msg 2/4", | |
3023 | kde.rsnxe, kde.rsnxe_len); | |
3024 | /* MLME-DEAUTHENTICATE.request */ | |
3025 | wpa_sta_disconnect(wpa_auth, sm->addr, | |
3026 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
3027 | return; | |
3b5b7aa8 | 3028 | } |
aed61c4e MV |
3029 | #ifdef CONFIG_OCV |
3030 | if (wpa_auth_uses_ocv(sm)) { | |
3031 | struct wpa_channel_info ci; | |
3032 | int tx_chanwidth; | |
3033 | int tx_seg1_idx; | |
3034 | ||
3035 | if (wpa_channel_info(wpa_auth, &ci) != 0) { | |
3036 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
3037 | "Failed to get channel info to validate received OCI in EAPOL-Key 2/4"); | |
3038 | return; | |
3039 | } | |
3040 | ||
3041 | if (get_sta_tx_parameters(sm, | |
3042 | channel_width_to_int(ci.chanwidth), | |
3043 | ci.seg1_idx, &tx_chanwidth, | |
3044 | &tx_seg1_idx) < 0) | |
3045 | return; | |
3046 | ||
3047 | if (ocv_verify_tx_params(kde.oci, kde.oci_len, &ci, | |
3048 | tx_chanwidth, tx_seg1_idx) != 0) { | |
3049 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
3050 | ocv_errorstr); | |
3051 | return; | |
3052 | } | |
3053 | } | |
3054 | #endif /* CONFIG_OCV */ | |
4ec1fd8e | 3055 | #ifdef CONFIG_IEEE80211R_AP |
3b5b7aa8 | 3056 | if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) { |
567da5bb JM |
3057 | wpa_sta_disconnect(wpa_auth, sm->addr, |
3058 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
3b5b7aa8 JM |
3059 | return; |
3060 | } | |
4ec1fd8e | 3061 | #endif /* CONFIG_IEEE80211R_AP */ |
3b5b7aa8 JM |
3062 | #ifdef CONFIG_P2P |
3063 | if (kde.ip_addr_req && kde.ip_addr_req[0] && | |
3064 | wpa_auth->ip_pool && WPA_GET_BE32(sm->ip_addr) == 0) { | |
3065 | int idx; | |
3066 | wpa_printf(MSG_DEBUG, | |
3067 | "P2P: IP address requested in EAPOL-Key exchange"); | |
3068 | idx = bitfield_get_first_zero(wpa_auth->ip_pool); | |
3069 | if (idx >= 0) { | |
3070 | u32 start = WPA_GET_BE32(wpa_auth->conf.ip_addr_start); | |
3071 | bitfield_set(wpa_auth->ip_pool, idx); | |
3072 | WPA_PUT_BE32(sm->ip_addr, start + idx); | |
3073 | wpa_printf(MSG_DEBUG, | |
3074 | "P2P: Assigned IP address %u.%u.%u.%u to " | |
3075 | MACSTR, sm->ip_addr[0], sm->ip_addr[1], | |
3076 | sm->ip_addr[2], sm->ip_addr[3], | |
3077 | MAC2STR(sm->addr)); | |
3078 | } | |
3079 | } | |
3080 | #endif /* CONFIG_P2P */ | |
3081 | ||
4ec1fd8e | 3082 | #ifdef CONFIG_IEEE80211R_AP |
26e23750 JM |
3083 | if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { |
3084 | /* | |
3085 | * Verify that PMKR1Name from EAPOL-Key message 2/4 matches | |
3086 | * with the value we derived. | |
3087 | */ | |
870834a1 JM |
3088 | if (os_memcmp_const(sm->sup_pmk_r1_name, sm->pmk_r1_name, |
3089 | WPA_PMK_NAME_LEN) != 0) { | |
26e23750 | 3090 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, |
f83d3491 JM |
3091 | "PMKR1Name mismatch in FT 4-way handshake"); |
3092 | wpa_hexdump(MSG_DEBUG, | |
3093 | "FT: PMKR1Name from Supplicant", | |
26e23750 JM |
3094 | sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN); |
3095 | wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name", | |
3096 | sm->pmk_r1_name, WPA_PMK_NAME_LEN); | |
3097 | return; | |
3098 | } | |
3099 | } | |
4ec1fd8e | 3100 | #endif /* CONFIG_IEEE80211R_AP */ |
26e23750 | 3101 | |
dbfa691d JM |
3102 | if (vlan_id && wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) && |
3103 | wpa_auth_update_vlan(wpa_auth, sm->addr, vlan_id) < 0) { | |
3104 | wpa_sta_disconnect(wpa_auth, sm->addr, | |
3105 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
3106 | return; | |
3107 | } | |
3108 | ||
e4bf4db9 | 3109 | sm->pending_1_of_4_timeout = 0; |
6fc6879b JM |
3110 | eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm); |
3111 | ||
56586197 | 3112 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) { |
6fc6879b JM |
3113 | /* PSK may have changed from the previous choice, so update |
3114 | * state machine data based on whatever PSK was selected here. | |
3115 | */ | |
3116 | os_memcpy(sm->PMK, pmk, PMK_LEN); | |
207976f0 | 3117 | sm->pmk_len = PMK_LEN; |
6fc6879b JM |
3118 | } |
3119 | ||
3120 | sm->MICVerified = TRUE; | |
3121 | ||
3122 | os_memcpy(&sm->PTK, &PTK, sizeof(PTK)); | |
31bc66e4 | 3123 | forced_memzero(&PTK, sizeof(PTK)); |
6fc6879b JM |
3124 | sm->PTK_valid = TRUE; |
3125 | } | |
3126 | ||
3127 | ||
3128 | SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2) | |
3129 | { | |
3130 | SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk); | |
3131 | sm->TimeoutCtr = 0; | |
3132 | } | |
3133 | ||
3134 | ||
6fc6879b JM |
3135 | static int ieee80211w_kde_len(struct wpa_state_machine *sm) |
3136 | { | |
16889aff JM |
3137 | size_t len = 0; |
3138 | ||
6fc6879b | 3139 | if (sm->mgmt_frame_prot) { |
16889aff JM |
3140 | len += 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN; |
3141 | len += wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher); | |
3142 | } | |
3143 | if (sm->mgmt_frame_prot && sm->wpa_auth->conf.beacon_prot) { | |
3144 | len += 2 + RSN_SELECTOR_LEN + WPA_BIGTK_KDE_PREFIX_LEN; | |
3145 | len += wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher); | |
6fc6879b JM |
3146 | } |
3147 | ||
16889aff | 3148 | return len; |
6fc6879b JM |
3149 | } |
3150 | ||
3151 | ||
3152 | static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos) | |
3153 | { | |
3154 | struct wpa_igtk_kde igtk; | |
16889aff | 3155 | struct wpa_bigtk_kde bigtk; |
6fc6879b | 3156 | struct wpa_group *gsm = sm->group; |
03610ad2 | 3157 | u8 rsc[WPA_KEY_RSC_LEN]; |
62e12afc JM |
3158 | struct wpa_auth_config *conf = &sm->wpa_auth->conf; |
3159 | size_t len = wpa_cipher_key_len(conf->group_mgmt_cipher); | |
6fc6879b JM |
3160 | |
3161 | if (!sm->mgmt_frame_prot) | |
3162 | return pos; | |
3163 | ||
3164 | igtk.keyid[0] = gsm->GN_igtk; | |
3165 | igtk.keyid[1] = 0; | |
7b1080da | 3166 | if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE || |
03610ad2 | 3167 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, rsc) < 0) |
6fc6879b | 3168 | os_memset(igtk.pn, 0, sizeof(igtk.pn)); |
03610ad2 JM |
3169 | else |
3170 | os_memcpy(igtk.pn, rsc, sizeof(igtk.pn)); | |
8dd9f9cd | 3171 | os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], len); |
62e12afc | 3172 | if (conf->disable_gtk || sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) { |
83421850 JM |
3173 | /* |
3174 | * Provide unique random IGTK to each STA to prevent use of | |
3175 | * IGTK in the BSS. | |
3176 | */ | |
8dd9f9cd | 3177 | if (random_get_bytes(igtk.igtk, len) < 0) |
83421850 JM |
3178 | return pos; |
3179 | } | |
6fc6879b | 3180 | pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK, |
8dd9f9cd JM |
3181 | (const u8 *) &igtk, WPA_IGTK_KDE_PREFIX_LEN + len, |
3182 | NULL, 0); | |
6fc6879b | 3183 | |
62e12afc | 3184 | if (!conf->beacon_prot) |
16889aff JM |
3185 | return pos; |
3186 | ||
3187 | bigtk.keyid[0] = gsm->GN_bigtk; | |
3188 | bigtk.keyid[1] = 0; | |
3189 | if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE || | |
3190 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_bigtk, rsc) < 0) | |
3191 | os_memset(bigtk.pn, 0, sizeof(bigtk.pn)); | |
3192 | else | |
3193 | os_memcpy(bigtk.pn, rsc, sizeof(bigtk.pn)); | |
3194 | os_memcpy(bigtk.bigtk, gsm->BIGTK[gsm->GN_bigtk - 6], len); | |
3195 | pos = wpa_add_kde(pos, RSN_KEY_DATA_BIGTK, | |
3196 | (const u8 *) &bigtk, WPA_BIGTK_KDE_PREFIX_LEN + len, | |
3197 | NULL, 0); | |
3198 | ||
6fc6879b JM |
3199 | return pos; |
3200 | } | |
3201 | ||
6fc6879b | 3202 | |
17c2559c MV |
3203 | static int ocv_oci_len(struct wpa_state_machine *sm) |
3204 | { | |
3205 | #ifdef CONFIG_OCV | |
3206 | if (wpa_auth_uses_ocv(sm)) | |
3207 | return OCV_OCI_KDE_LEN; | |
3208 | #endif /* CONFIG_OCV */ | |
3209 | return 0; | |
3210 | } | |
3211 | ||
3212 | static int ocv_oci_add(struct wpa_state_machine *sm, u8 **argpos) | |
3213 | { | |
3214 | #ifdef CONFIG_OCV | |
3215 | struct wpa_channel_info ci; | |
3216 | ||
3217 | if (!wpa_auth_uses_ocv(sm)) | |
3218 | return 0; | |
3219 | ||
3220 | if (wpa_channel_info(sm->wpa_auth, &ci) != 0) { | |
3221 | wpa_printf(MSG_WARNING, | |
3222 | "Failed to get channel info for OCI element"); | |
3223 | return -1; | |
3224 | } | |
3225 | ||
3226 | return ocv_insert_oci_kde(&ci, argpos); | |
3227 | #else /* CONFIG_OCV */ | |
3228 | return 0; | |
3229 | #endif /* CONFIG_OCV */ | |
3230 | } | |
3231 | ||
3232 | ||
9128b672 JM |
3233 | #ifdef CONFIG_TESTING_OPTIONS |
3234 | static u8 * replace_ie(const char *name, const u8 *old_buf, size_t *len, u8 eid, | |
3235 | const u8 *ie, size_t ie_len) | |
3236 | { | |
3237 | const u8 *elem; | |
3238 | u8 *buf; | |
3239 | ||
3240 | wpa_printf(MSG_DEBUG, "TESTING: %s EAPOL override", name); | |
3241 | wpa_hexdump(MSG_DEBUG, "TESTING: wpa_ie before override", | |
3242 | old_buf, *len); | |
3243 | buf = os_malloc(*len + ie_len); | |
3244 | if (!buf) | |
3245 | return NULL; | |
3246 | os_memcpy(buf, old_buf, *len); | |
3247 | elem = get_ie(buf, *len, eid); | |
3248 | if (elem) { | |
3249 | u8 elem_len = 2 + elem[1]; | |
3250 | ||
3251 | os_memmove((void *) elem, elem + elem_len, | |
3252 | *len - (elem - buf) - elem_len); | |
3253 | *len -= elem_len; | |
3254 | } | |
3255 | os_memcpy(buf + *len, ie, ie_len); | |
3256 | *len += ie_len; | |
3257 | wpa_hexdump(MSG_DEBUG, "TESTING: wpa_ie after EAPOL override", | |
3258 | buf, *len); | |
3259 | ||
3260 | return buf; | |
3261 | } | |
3262 | #endif /* CONFIG_TESTING_OPTIONS */ | |
3263 | ||
3264 | ||
6fc6879b JM |
3265 | SM_STATE(WPA_PTK, PTKINITNEGOTIATING) |
3266 | { | |
f2c4b44b | 3267 | u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde = NULL, *pos, dummy_gtk[32]; |
9128b672 | 3268 | size_t gtk_len, kde_len, wpa_ie_len; |
6fc6879b JM |
3269 | struct wpa_group *gsm = sm->group; |
3270 | u8 *wpa_ie; | |
9128b672 | 3271 | int secure, gtkidx, encr = 0; |
4d64fd37 | 3272 | u8 *wpa_ie_buf = NULL, *wpa_ie_buf2 = NULL; |
862aac1f | 3273 | u8 hdr[2]; |
82cc0b0c | 3274 | struct wpa_auth_config *conf = &sm->wpa_auth->conf; |
6fc6879b JM |
3275 | |
3276 | SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk); | |
3277 | sm->TimeoutEvt = FALSE; | |
bae61562 JM |
3278 | |
3279 | sm->TimeoutCtr++; | |
62e12afc | 3280 | if (conf->wpa_disable_eapol_key_retries && sm->TimeoutCtr > 1) { |
6f234c1e JM |
3281 | /* Do not allow retransmission of EAPOL-Key msg 3/4 */ |
3282 | return; | |
3283 | } | |
62e12afc | 3284 | if (sm->TimeoutCtr > conf->wpa_pairwise_update_count) { |
bae61562 JM |
3285 | /* No point in sending the EAPOL-Key - we will disconnect |
3286 | * immediately following this. */ | |
3287 | return; | |
3288 | } | |
3289 | ||
86dfabb8 | 3290 | /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE], |
16889aff | 3291 | GTK[GN], IGTK, [BIGTK], [FTIE], [TIE * 2]) |
6fc6879b JM |
3292 | */ |
3293 | os_memset(rsc, 0, WPA_KEY_RSC_LEN); | |
3294 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc); | |
86dfabb8 | 3295 | /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */ |
6fc6879b JM |
3296 | wpa_ie = sm->wpa_auth->wpa_ie; |
3297 | wpa_ie_len = sm->wpa_auth->wpa_ie_len; | |
62e12afc | 3298 | if (sm->wpa == WPA_VERSION_WPA && (conf->wpa & WPA_PROTO_RSN) && |
9128b672 | 3299 | wpa_ie_len > wpa_ie[1] + 2U && wpa_ie[0] == WLAN_EID_RSN) { |
774d4145 | 3300 | /* WPA-only STA, remove RSN IE and possible MDIE */ |
6fc6879b | 3301 | wpa_ie = wpa_ie + wpa_ie[1] + 2; |
774d4145 JM |
3302 | if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN) |
3303 | wpa_ie = wpa_ie + wpa_ie[1] + 2; | |
6fc6879b JM |
3304 | wpa_ie_len = wpa_ie[1] + 2; |
3305 | } | |
f2c4b44b | 3306 | #ifdef CONFIG_TESTING_OPTIONS |
62e12afc | 3307 | if (conf->rsne_override_eapol_set) { |
4d64fd37 JM |
3308 | wpa_ie_buf2 = replace_ie( |
3309 | "RSNE", wpa_ie, &wpa_ie_len, WLAN_EID_RSN, | |
62e12afc JM |
3310 | conf->rsne_override_eapol, |
3311 | conf->rsne_override_eapol_len); | |
4d64fd37 JM |
3312 | if (!wpa_ie_buf2) |
3313 | goto done; | |
3314 | wpa_ie = wpa_ie_buf2; | |
3315 | } | |
62e12afc | 3316 | if (conf->rsnxe_override_eapol_set) { |
9128b672 JM |
3317 | wpa_ie_buf = replace_ie( |
3318 | "RSNXE", wpa_ie, &wpa_ie_len, WLAN_EID_RSNX, | |
62e12afc JM |
3319 | conf->rsnxe_override_eapol, |
3320 | conf->rsnxe_override_eapol_len); | |
f2c4b44b | 3321 | if (!wpa_ie_buf) |
9128b672 | 3322 | goto done; |
f2c4b44b | 3323 | wpa_ie = wpa_ie_buf; |
f2c4b44b JM |
3324 | } |
3325 | #endif /* CONFIG_TESTING_OPTIONS */ | |
6fc6879b JM |
3326 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, |
3327 | "sending 3/4 msg of 4-Way Handshake"); | |
3328 | if (sm->wpa == WPA_VERSION_WPA2) { | |
862aac1f AW |
3329 | if (sm->use_ext_key_id && sm->TimeoutCtr == 1 && |
3330 | wpa_auth_set_key(sm->wpa_auth, 0, | |
3331 | wpa_cipher_to_alg(sm->pairwise), | |
3332 | sm->addr, | |
3333 | sm->keyidx_active, sm->PTK.tk, | |
3334 | wpa_cipher_key_len(sm->pairwise), | |
3335 | KEY_FLAG_PAIRWISE_RX)) { | |
3336 | wpa_sta_disconnect(sm->wpa_auth, sm->addr, | |
3337 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
3338 | return; | |
3339 | } | |
3340 | ||
6fc6879b JM |
3341 | /* WPA2 send GTK in the 4-way handshake */ |
3342 | secure = 1; | |
3343 | gtk = gsm->GTK[gsm->GN - 1]; | |
3344 | gtk_len = gsm->GTK_len; | |
62e12afc | 3345 | if (conf->disable_gtk || |
8d660a4b | 3346 | sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) { |
83421850 JM |
3347 | /* |
3348 | * Provide unique random GTK to each STA to prevent use | |
3349 | * of GTK in the BSS. | |
3350 | */ | |
3351 | if (random_get_bytes(dummy_gtk, gtk_len) < 0) | |
f2c4b44b | 3352 | goto done; |
83421850 JM |
3353 | gtk = dummy_gtk; |
3354 | } | |
7a4b01c8 | 3355 | gtkidx = gsm->GN; |
6fc6879b JM |
3356 | _rsc = rsc; |
3357 | encr = 1; | |
3358 | } else { | |
3359 | /* WPA does not include GTK in msg 3/4 */ | |
3360 | secure = 0; | |
3361 | gtk = NULL; | |
3362 | gtk_len = 0; | |
6fc6879b | 3363 | _rsc = NULL; |
0d442aff JM |
3364 | if (sm->rx_eapol_key_secure) { |
3365 | /* | |
3366 | * It looks like Windows 7 supplicant tries to use | |
3367 | * Secure bit in msg 2/4 after having reported Michael | |
3368 | * MIC failure and it then rejects the 4-way handshake | |
3369 | * if msg 3/4 does not set Secure bit. Work around this | |
3370 | * by setting the Secure bit here even in the case of | |
3371 | * WPA if the supplicant used it first. | |
3372 | */ | |
3373 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
f83d3491 | 3374 | "STA used Secure bit in WPA msg 2/4 - set Secure for 3/4 as workaround"); |
0d442aff JM |
3375 | secure = 1; |
3376 | } | |
6fc6879b JM |
3377 | } |
3378 | ||
17c2559c | 3379 | kde_len = wpa_ie_len + ieee80211w_kde_len(sm) + ocv_oci_len(sm); |
862aac1f AW |
3380 | |
3381 | if (sm->use_ext_key_id) | |
3382 | kde_len += 2 + RSN_SELECTOR_LEN + 2; | |
3383 | ||
6fc6879b JM |
3384 | if (gtk) |
3385 | kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len; | |
4ec1fd8e | 3386 | #ifdef CONFIG_IEEE80211R_AP |
86dfabb8 JM |
3387 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { |
3388 | kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */ | |
3389 | kde_len += 300; /* FTIE + 2 * TIE */ | |
3390 | } | |
4ec1fd8e | 3391 | #endif /* CONFIG_IEEE80211R_AP */ |
25ef8529 JM |
3392 | #ifdef CONFIG_P2P |
3393 | if (WPA_GET_BE32(sm->ip_addr) > 0) | |
3394 | kde_len += 2 + RSN_SELECTOR_LEN + 3 * 4; | |
3395 | #endif /* CONFIG_P2P */ | |
82cc0b0c JM |
3396 | |
3397 | if (conf->transition_disable) | |
3398 | kde_len += 2 + RSN_SELECTOR_LEN + 1; | |
3399 | ||
6fc6879b | 3400 | kde = os_malloc(kde_len); |
9385f03f | 3401 | if (!kde) |
f2c4b44b | 3402 | goto done; |
6fc6879b JM |
3403 | |
3404 | pos = kde; | |
3405 | os_memcpy(pos, wpa_ie, wpa_ie_len); | |
3406 | pos += wpa_ie_len; | |
4ec1fd8e | 3407 | #ifdef CONFIG_IEEE80211R_AP |
26e23750 | 3408 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { |
59e78c24 JM |
3409 | int res; |
3410 | size_t elen; | |
3411 | ||
3412 | elen = pos - kde; | |
3413 | res = wpa_insert_pmkid(kde, &elen, sm->pmk_r1_name); | |
26e23750 | 3414 | if (res < 0) { |
f83d3491 JM |
3415 | wpa_printf(MSG_ERROR, |
3416 | "FT: Failed to insert PMKR1Name into RSN IE in EAPOL-Key data"); | |
f2c4b44b | 3417 | goto done; |
26e23750 | 3418 | } |
59e78c24 JM |
3419 | pos -= wpa_ie_len; |
3420 | pos += elen; | |
26e23750 | 3421 | } |
4ec1fd8e | 3422 | #endif /* CONFIG_IEEE80211R_AP */ |
862aac1f AW |
3423 | hdr[1] = 0; |
3424 | ||
3425 | if (sm->use_ext_key_id) { | |
3426 | hdr[0] = sm->keyidx_active & 0x01; | |
3427 | pos = wpa_add_kde(pos, RSN_KEY_DATA_KEYID, hdr, 2, NULL, 0); | |
3428 | } | |
3429 | ||
6fc6879b | 3430 | if (gtk) { |
7a4b01c8 | 3431 | hdr[0] = gtkidx & 0x03; |
6fc6879b JM |
3432 | pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2, |
3433 | gtk, gtk_len); | |
3434 | } | |
3435 | pos = ieee80211w_kde_add(sm, pos); | |
f2c4b44b JM |
3436 | if (ocv_oci_add(sm, &pos) < 0) |
3437 | goto done; | |
6fc6879b | 3438 | |
4ec1fd8e | 3439 | #ifdef CONFIG_IEEE80211R_AP |
86dfabb8 JM |
3440 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { |
3441 | int res; | |
86dfabb8 | 3442 | |
9257610a JM |
3443 | if (sm->assoc_resp_ftie && |
3444 | kde + kde_len - pos >= 2 + sm->assoc_resp_ftie[1]) { | |
3445 | os_memcpy(pos, sm->assoc_resp_ftie, | |
3446 | 2 + sm->assoc_resp_ftie[1]); | |
3447 | res = 2 + sm->assoc_resp_ftie[1]; | |
3448 | } else { | |
a7968ea5 JM |
3449 | int use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt); |
3450 | ||
3451 | res = wpa_write_ftie(conf, use_sha384, | |
3452 | conf->r0_key_holder, | |
9257610a JM |
3453 | conf->r0_key_holder_len, |
3454 | NULL, NULL, pos, | |
3455 | kde + kde_len - pos, | |
51d1924b | 3456 | NULL, 0, 0); |
9257610a | 3457 | } |
86dfabb8 | 3458 | if (res < 0) { |
f83d3491 JM |
3459 | wpa_printf(MSG_ERROR, |
3460 | "FT: Failed to insert FTIE into EAPOL-Key Key Data"); | |
f2c4b44b | 3461 | goto done; |
86dfabb8 JM |
3462 | } |
3463 | pos += res; | |
3464 | ||
3465 | /* TIE[ReassociationDeadline] (TU) */ | |
3466 | *pos++ = WLAN_EID_TIMEOUT_INTERVAL; | |
3467 | *pos++ = 5; | |
3468 | *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE; | |
3469 | WPA_PUT_LE32(pos, conf->reassociation_deadline); | |
3470 | pos += 4; | |
3471 | ||
3472 | /* TIE[KeyLifetime] (seconds) */ | |
3473 | *pos++ = WLAN_EID_TIMEOUT_INTERVAL; | |
3474 | *pos++ = 5; | |
3475 | *pos++ = WLAN_TIMEOUT_KEY_LIFETIME; | |
83fe4bd3 | 3476 | WPA_PUT_LE32(pos, conf->r0_key_lifetime); |
86dfabb8 JM |
3477 | pos += 4; |
3478 | } | |
4ec1fd8e | 3479 | #endif /* CONFIG_IEEE80211R_AP */ |
25ef8529 JM |
3480 | #ifdef CONFIG_P2P |
3481 | if (WPA_GET_BE32(sm->ip_addr) > 0) { | |
3482 | u8 addr[3 * 4]; | |
3483 | os_memcpy(addr, sm->ip_addr, 4); | |
62e12afc JM |
3484 | os_memcpy(addr + 4, conf->ip_addr_mask, 4); |
3485 | os_memcpy(addr + 8, conf->ip_addr_go, 4); | |
25ef8529 JM |
3486 | pos = wpa_add_kde(pos, WFA_KEY_DATA_IP_ADDR_ALLOC, |
3487 | addr, sizeof(addr), NULL, 0); | |
3488 | } | |
3489 | #endif /* CONFIG_P2P */ | |
86dfabb8 | 3490 | |
82cc0b0c JM |
3491 | if (conf->transition_disable) |
3492 | pos = wpa_add_kde(pos, WFA_KEY_DATA_TRANSITION_DISABLE, | |
3493 | &conf->transition_disable, 1, NULL, 0); | |
3494 | ||
6fc6879b | 3495 | wpa_send_eapol(sm->wpa_auth, sm, |
b729fd8d | 3496 | (secure ? WPA_KEY_INFO_SECURE : 0) | |
567da5bb JM |
3497 | (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ? |
3498 | WPA_KEY_INFO_MIC : 0) | | |
6fc6879b JM |
3499 | WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL | |
3500 | WPA_KEY_INFO_KEY_TYPE, | |
7a4b01c8 | 3501 | _rsc, sm->ANonce, kde, pos - kde, 0, encr); |
f2c4b44b | 3502 | done: |
6fc6879b | 3503 | os_free(kde); |
f2c4b44b | 3504 | os_free(wpa_ie_buf); |
4d64fd37 | 3505 | os_free(wpa_ie_buf2); |
6fc6879b JM |
3506 | } |
3507 | ||
3508 | ||
3509 | SM_STATE(WPA_PTK, PTKINITDONE) | |
3510 | { | |
3511 | SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk); | |
3512 | sm->EAPOLKeyReceived = FALSE; | |
3513 | if (sm->Pair) { | |
c3550295 JM |
3514 | enum wpa_alg alg = wpa_cipher_to_alg(sm->pairwise); |
3515 | int klen = wpa_cipher_key_len(sm->pairwise); | |
862aac1f AW |
3516 | int res; |
3517 | ||
3518 | if (sm->use_ext_key_id) | |
3519 | res = wpa_auth_set_key(sm->wpa_auth, 0, 0, sm->addr, | |
3520 | sm->keyidx_active, NULL, 0, | |
3521 | KEY_FLAG_PAIRWISE_RX_TX_MODIFY); | |
3522 | else | |
3523 | res = wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, | |
3524 | 0, sm->PTK.tk, klen, | |
3525 | KEY_FLAG_PAIRWISE_RX_TX); | |
3526 | if (res) { | |
567da5bb JM |
3527 | wpa_sta_disconnect(sm->wpa_auth, sm->addr, |
3528 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
6fc6879b JM |
3529 | return; |
3530 | } | |
3531 | /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */ | |
3532 | sm->pairwise_set = TRUE; | |
3533 | ||
a40bd06e | 3534 | wpa_auth_set_ptk_rekey_timer(sm); |
581a8cde | 3535 | |
a1ea1b45 | 3536 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) || |
567da5bb | 3537 | sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP || |
a1ea1b45 | 3538 | sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) { |
6fc6879b JM |
3539 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, |
3540 | WPA_EAPOL_authorized, 1); | |
3541 | } | |
3542 | } | |
3543 | ||
3544 | if (0 /* IBSS == TRUE */) { | |
3545 | sm->keycount++; | |
3546 | if (sm->keycount == 2) { | |
3547 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, | |
3548 | WPA_EAPOL_portValid, 1); | |
3549 | } | |
3550 | } else { | |
3551 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, | |
3552 | 1); | |
3553 | } | |
3554 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0); | |
3555 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1); | |
3556 | if (sm->wpa == WPA_VERSION_WPA) | |
3557 | sm->PInitAKeys = TRUE; | |
3558 | else | |
3559 | sm->has_GTK = TRUE; | |
3560 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO, | |
3561 | "pairwise key handshake completed (%s)", | |
3562 | sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN"); | |
3563 | ||
4ec1fd8e | 3564 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b | 3565 | wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr); |
4ec1fd8e | 3566 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b JM |
3567 | } |
3568 | ||
3569 | ||
3570 | SM_STEP(WPA_PTK) | |
3571 | { | |
3572 | struct wpa_authenticator *wpa_auth = sm->wpa_auth; | |
62e12afc | 3573 | struct wpa_auth_config *conf = &wpa_auth->conf; |
6fc6879b JM |
3574 | |
3575 | if (sm->Init) | |
3576 | SM_ENTER(WPA_PTK, INITIALIZE); | |
3577 | else if (sm->Disconnect | |
1aae01fc BG |
3578 | /* || FIX: dot11RSNAConfigSALifetime timeout */) { |
3579 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
3580 | "WPA_PTK: sm->Disconnect"); | |
6fc6879b | 3581 | SM_ENTER(WPA_PTK, DISCONNECT); |
1aae01fc | 3582 | } |
6fc6879b JM |
3583 | else if (sm->DeauthenticationRequest) |
3584 | SM_ENTER(WPA_PTK, DISCONNECTED); | |
3585 | else if (sm->AuthenticationRequest) | |
3586 | SM_ENTER(WPA_PTK, AUTHENTICATION); | |
3587 | else if (sm->ReAuthenticationRequest) | |
3588 | SM_ENTER(WPA_PTK, AUTHENTICATION2); | |
0adc9b28 JM |
3589 | else if (sm->PTKRequest) { |
3590 | if (wpa_auth_sm_ptk_update(sm) < 0) | |
3591 | SM_ENTER(WPA_PTK, DISCONNECTED); | |
3592 | else | |
3593 | SM_ENTER(WPA_PTK, PTKSTART); | |
3594 | } else switch (sm->wpa_ptk_state) { | |
6fc6879b JM |
3595 | case WPA_PTK_INITIALIZE: |
3596 | break; | |
3597 | case WPA_PTK_DISCONNECT: | |
3598 | SM_ENTER(WPA_PTK, DISCONNECTED); | |
3599 | break; | |
3600 | case WPA_PTK_DISCONNECTED: | |
3601 | SM_ENTER(WPA_PTK, INITIALIZE); | |
3602 | break; | |
3603 | case WPA_PTK_AUTHENTICATION: | |
3604 | SM_ENTER(WPA_PTK, AUTHENTICATION2); | |
3605 | break; | |
3606 | case WPA_PTK_AUTHENTICATION2: | |
56586197 | 3607 | if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) && |
62e12afc | 3608 | wpa_auth_get_eapol(wpa_auth, sm->addr, |
6fc6879b JM |
3609 | WPA_EAPOL_keyRun) > 0) |
3610 | SM_ENTER(WPA_PTK, INITPMK); | |
a1ea1b45 JM |
3611 | else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) || |
3612 | sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE | |
6fc6879b JM |
3613 | /* FIX: && 802.1X::keyRun */) |
3614 | SM_ENTER(WPA_PTK, INITPSK); | |
567da5bb JM |
3615 | else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP) |
3616 | SM_ENTER(WPA_PTK, INITPMK); | |
6fc6879b JM |
3617 | break; |
3618 | case WPA_PTK_INITPMK: | |
62e12afc | 3619 | if (wpa_auth_get_eapol(wpa_auth, sm->addr, |
567da5bb | 3620 | WPA_EAPOL_keyAvailable) > 0) { |
6fc6879b | 3621 | SM_ENTER(WPA_PTK, PTKSTART); |
567da5bb JM |
3622 | #ifdef CONFIG_DPP |
3623 | } else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP && sm->pmksa) { | |
3624 | SM_ENTER(WPA_PTK, PTKSTART); | |
3625 | #endif /* CONFIG_DPP */ | |
3626 | } else { | |
6fc6879b | 3627 | wpa_auth->dot11RSNA4WayHandshakeFailures++; |
62e12afc | 3628 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, |
1aae01fc | 3629 | "INITPMK - keyAvailable = false"); |
6fc6879b JM |
3630 | SM_ENTER(WPA_PTK, DISCONNECT); |
3631 | } | |
3632 | break; | |
3633 | case WPA_PTK_INITPSK: | |
62e12afc | 3634 | if (wpa_auth_get_psk(wpa_auth, sm->addr, sm->p2p_dev_addr, |
dbfa691d | 3635 | NULL, NULL, NULL)) { |
6fc6879b | 3636 | SM_ENTER(WPA_PTK, PTKSTART); |
e61fea6b JM |
3637 | #ifdef CONFIG_SAE |
3638 | } else if (wpa_auth_uses_sae(sm) && sm->pmksa) { | |
3639 | SM_ENTER(WPA_PTK, PTKSTART); | |
3640 | #endif /* CONFIG_SAE */ | |
3641 | } else { | |
62e12afc | 3642 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, |
6fc6879b JM |
3643 | "no PSK configured for the STA"); |
3644 | wpa_auth->dot11RSNA4WayHandshakeFailures++; | |
3645 | SM_ENTER(WPA_PTK, DISCONNECT); | |
3646 | } | |
3647 | break; | |
3648 | case WPA_PTK_PTKSTART: | |
3649 | if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest && | |
3650 | sm->EAPOLKeyPairwise) | |
3651 | SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING); | |
62e12afc | 3652 | else if (sm->TimeoutCtr > conf->wpa_pairwise_update_count) { |
6fc6879b | 3653 | wpa_auth->dot11RSNA4WayHandshakeFailures++; |
62e12afc JM |
3654 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, |
3655 | "PTKSTART: Retry limit %u reached", | |
3656 | conf->wpa_pairwise_update_count); | |
6fc6879b JM |
3657 | SM_ENTER(WPA_PTK, DISCONNECT); |
3658 | } else if (sm->TimeoutEvt) | |
3659 | SM_ENTER(WPA_PTK, PTKSTART); | |
3660 | break; | |
3661 | case WPA_PTK_PTKCALCNEGOTIATING: | |
3662 | if (sm->MICVerified) | |
3663 | SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2); | |
3664 | else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest && | |
3665 | sm->EAPOLKeyPairwise) | |
3666 | SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING); | |
3667 | else if (sm->TimeoutEvt) | |
3668 | SM_ENTER(WPA_PTK, PTKSTART); | |
3669 | break; | |
3670 | case WPA_PTK_PTKCALCNEGOTIATING2: | |
3671 | SM_ENTER(WPA_PTK, PTKINITNEGOTIATING); | |
3672 | break; | |
3673 | case WPA_PTK_PTKINITNEGOTIATING: | |
68921e24 JM |
3674 | if (sm->update_snonce) |
3675 | SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING); | |
3676 | else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest && | |
3677 | sm->EAPOLKeyPairwise && sm->MICVerified) | |
6fc6879b JM |
3678 | SM_ENTER(WPA_PTK, PTKINITDONE); |
3679 | else if (sm->TimeoutCtr > | |
62e12afc JM |
3680 | conf->wpa_pairwise_update_count || |
3681 | (conf->wpa_disable_eapol_key_retries && | |
6f234c1e | 3682 | sm->TimeoutCtr > 1)) { |
6fc6879b | 3683 | wpa_auth->dot11RSNA4WayHandshakeFailures++; |
62e12afc JM |
3684 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, |
3685 | "PTKINITNEGOTIATING: Retry limit %u reached", | |
3686 | conf->wpa_pairwise_update_count); | |
6fc6879b JM |
3687 | SM_ENTER(WPA_PTK, DISCONNECT); |
3688 | } else if (sm->TimeoutEvt) | |
3689 | SM_ENTER(WPA_PTK, PTKINITNEGOTIATING); | |
3690 | break; | |
3691 | case WPA_PTK_PTKINITDONE: | |
3692 | break; | |
3693 | } | |
3694 | } | |
3695 | ||
3696 | ||
3697 | SM_STATE(WPA_PTK_GROUP, IDLE) | |
3698 | { | |
3699 | SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group); | |
3700 | if (sm->Init) { | |
3701 | /* Init flag is not cleared here, so avoid busy | |
3702 | * loop by claiming nothing changed. */ | |
3703 | sm->changed = FALSE; | |
3704 | } | |
3705 | sm->GTimeoutCtr = 0; | |
3706 | } | |
3707 | ||
3708 | ||
3709 | SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING) | |
3710 | { | |
3711 | u8 rsc[WPA_KEY_RSC_LEN]; | |
3712 | struct wpa_group *gsm = sm->group; | |
e41e4f9e JM |
3713 | const u8 *kde; |
3714 | u8 *kde_buf = NULL, *pos, hdr[2]; | |
6fc6879b | 3715 | size_t kde_len; |
83421850 | 3716 | u8 *gtk, dummy_gtk[32]; |
62e12afc | 3717 | struct wpa_auth_config *conf = &sm->wpa_auth->conf; |
6fc6879b JM |
3718 | |
3719 | SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group); | |
bae61562 JM |
3720 | |
3721 | sm->GTimeoutCtr++; | |
62e12afc | 3722 | if (conf->wpa_disable_eapol_key_retries && sm->GTimeoutCtr > 1) { |
6f234c1e JM |
3723 | /* Do not allow retransmission of EAPOL-Key group msg 1/2 */ |
3724 | return; | |
3725 | } | |
62e12afc | 3726 | if (sm->GTimeoutCtr > conf->wpa_group_update_count) { |
bae61562 JM |
3727 | /* No point in sending the EAPOL-Key - we will disconnect |
3728 | * immediately following this. */ | |
3729 | return; | |
3730 | } | |
3731 | ||
6fc6879b JM |
3732 | if (sm->wpa == WPA_VERSION_WPA) |
3733 | sm->PInitAKeys = FALSE; | |
3734 | sm->TimeoutEvt = FALSE; | |
3735 | /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */ | |
3736 | os_memset(rsc, 0, WPA_KEY_RSC_LEN); | |
3737 | if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE) | |
3738 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc); | |
3739 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
3740 | "sending 1/2 msg of Group Key Handshake"); | |
3741 | ||
83421850 | 3742 | gtk = gsm->GTK[gsm->GN - 1]; |
62e12afc | 3743 | if (conf->disable_gtk || sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) { |
83421850 JM |
3744 | /* |
3745 | * Provide unique random GTK to each STA to prevent use | |
3746 | * of GTK in the BSS. | |
3747 | */ | |
3748 | if (random_get_bytes(dummy_gtk, gsm->GTK_len) < 0) | |
3749 | return; | |
3750 | gtk = dummy_gtk; | |
3751 | } | |
6fc6879b JM |
3752 | if (sm->wpa == WPA_VERSION_WPA2) { |
3753 | kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len + | |
17c2559c | 3754 | ieee80211w_kde_len(sm) + ocv_oci_len(sm); |
e41e4f9e | 3755 | kde_buf = os_malloc(kde_len); |
9385f03f | 3756 | if (!kde_buf) |
6fc6879b JM |
3757 | return; |
3758 | ||
e41e4f9e | 3759 | kde = pos = kde_buf; |
6fc6879b JM |
3760 | hdr[0] = gsm->GN & 0x03; |
3761 | hdr[1] = 0; | |
3762 | pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2, | |
83421850 | 3763 | gtk, gsm->GTK_len); |
6fc6879b | 3764 | pos = ieee80211w_kde_add(sm, pos); |
17c2559c MV |
3765 | if (ocv_oci_add(sm, &pos) < 0) { |
3766 | os_free(kde_buf); | |
3767 | return; | |
3768 | } | |
e41e4f9e | 3769 | kde_len = pos - kde; |
6fc6879b | 3770 | } else { |
83421850 | 3771 | kde = gtk; |
e41e4f9e | 3772 | kde_len = gsm->GTK_len; |
6fc6879b JM |
3773 | } |
3774 | ||
3775 | wpa_send_eapol(sm->wpa_auth, sm, | |
b729fd8d | 3776 | WPA_KEY_INFO_SECURE | |
567da5bb JM |
3777 | (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ? |
3778 | WPA_KEY_INFO_MIC : 0) | | |
6fc6879b JM |
3779 | WPA_KEY_INFO_ACK | |
3780 | (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0), | |
b0fb2be7 | 3781 | rsc, NULL, kde, kde_len, gsm->GN, 1); |
e41e4f9e JM |
3782 | |
3783 | os_free(kde_buf); | |
6fc6879b JM |
3784 | } |
3785 | ||
3786 | ||
3787 | SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED) | |
3788 | { | |
aed61c4e | 3789 | struct wpa_authenticator *wpa_auth = sm->wpa_auth; |
62e12afc | 3790 | #ifdef CONFIG_OCV |
aed61c4e MV |
3791 | const u8 *key_data, *mic; |
3792 | struct ieee802_1x_hdr *hdr; | |
3793 | struct wpa_eapol_key *key; | |
3794 | struct wpa_eapol_ie_parse kde; | |
3795 | size_t mic_len; | |
3796 | u16 key_data_length; | |
3797 | #endif /* CONFIG_OCV */ | |
3798 | ||
6fc6879b JM |
3799 | SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group); |
3800 | sm->EAPOLKeyReceived = FALSE; | |
aed61c4e MV |
3801 | |
3802 | #ifdef CONFIG_OCV | |
3803 | mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len); | |
3804 | ||
3805 | /* | |
3806 | * Note: last_rx_eapol_key length fields have already been validated in | |
3807 | * wpa_receive(). | |
3808 | */ | |
3809 | hdr = (struct ieee802_1x_hdr *) sm->last_rx_eapol_key; | |
3810 | key = (struct wpa_eapol_key *) (hdr + 1); | |
3811 | mic = (u8 *) (key + 1); | |
3812 | key_data = mic + mic_len + 2; | |
3813 | key_data_length = WPA_GET_BE16(mic + mic_len); | |
3814 | if (key_data_length > sm->last_rx_eapol_key_len - sizeof(*hdr) - | |
3815 | sizeof(*key) - mic_len - 2) | |
3816 | return; | |
3817 | ||
3818 | if (wpa_parse_kde_ies(key_data, key_data_length, &kde) < 0) { | |
3819 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
3820 | "received EAPOL-Key group msg 2/2 with invalid Key Data contents"); | |
3821 | return; | |
3822 | } | |
3823 | ||
3824 | if (wpa_auth_uses_ocv(sm)) { | |
3825 | struct wpa_channel_info ci; | |
3826 | int tx_chanwidth; | |
3827 | int tx_seg1_idx; | |
3828 | ||
3829 | if (wpa_channel_info(wpa_auth, &ci) != 0) { | |
3830 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
3831 | "Failed to get channel info to validate received OCI in EAPOL-Key group 1/2"); | |
3832 | return; | |
3833 | } | |
3834 | ||
3835 | if (get_sta_tx_parameters(sm, | |
3836 | channel_width_to_int(ci.chanwidth), | |
3837 | ci.seg1_idx, &tx_chanwidth, | |
3838 | &tx_seg1_idx) < 0) | |
3839 | return; | |
3840 | ||
3841 | if (ocv_verify_tx_params(kde.oci, kde.oci_len, &ci, | |
3842 | tx_chanwidth, tx_seg1_idx) != 0) { | |
3843 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
3844 | ocv_errorstr); | |
3845 | return; | |
3846 | } | |
3847 | } | |
3848 | #endif /* CONFIG_OCV */ | |
3849 | ||
6fc6879b JM |
3850 | if (sm->GUpdateStationKeys) |
3851 | sm->group->GKeyDoneStations--; | |
3852 | sm->GUpdateStationKeys = FALSE; | |
3853 | sm->GTimeoutCtr = 0; | |
3854 | /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */ | |
62e12afc | 3855 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, |
6fc6879b JM |
3856 | "group key handshake completed (%s)", |
3857 | sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN"); | |
3858 | sm->has_GTK = TRUE; | |
3859 | } | |
3860 | ||
3861 | ||
3862 | SM_STATE(WPA_PTK_GROUP, KEYERROR) | |
3863 | { | |
3864 | SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group); | |
3865 | if (sm->GUpdateStationKeys) | |
3866 | sm->group->GKeyDoneStations--; | |
3867 | sm->GUpdateStationKeys = FALSE; | |
3868 | sm->Disconnect = TRUE; | |
4bb9b674 GK |
3869 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO, |
3870 | "group key handshake failed (%s) after %u tries", | |
3871 | sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN", | |
3872 | sm->wpa_auth->conf.wpa_group_update_count); | |
6fc6879b JM |
3873 | } |
3874 | ||
3875 | ||
3876 | SM_STEP(WPA_PTK_GROUP) | |
3877 | { | |
9663596f | 3878 | if (sm->Init || sm->PtkGroupInit) { |
6fc6879b | 3879 | SM_ENTER(WPA_PTK_GROUP, IDLE); |
9663596f JM |
3880 | sm->PtkGroupInit = FALSE; |
3881 | } else switch (sm->wpa_ptk_group_state) { | |
6fc6879b JM |
3882 | case WPA_PTK_GROUP_IDLE: |
3883 | if (sm->GUpdateStationKeys || | |
3884 | (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys)) | |
3885 | SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING); | |
3886 | break; | |
3887 | case WPA_PTK_GROUP_REKEYNEGOTIATING: | |
3888 | if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest && | |
3889 | !sm->EAPOLKeyPairwise && sm->MICVerified) | |
3890 | SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED); | |
3891 | else if (sm->GTimeoutCtr > | |
6f234c1e JM |
3892 | sm->wpa_auth->conf.wpa_group_update_count || |
3893 | (sm->wpa_auth->conf.wpa_disable_eapol_key_retries && | |
3894 | sm->GTimeoutCtr > 1)) | |
6fc6879b JM |
3895 | SM_ENTER(WPA_PTK_GROUP, KEYERROR); |
3896 | else if (sm->TimeoutEvt) | |
3897 | SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING); | |
3898 | break; | |
3899 | case WPA_PTK_GROUP_KEYERROR: | |
3900 | SM_ENTER(WPA_PTK_GROUP, IDLE); | |
3901 | break; | |
3902 | case WPA_PTK_GROUP_REKEYESTABLISHED: | |
3903 | SM_ENTER(WPA_PTK_GROUP, IDLE); | |
3904 | break; | |
3905 | } | |
3906 | } | |
3907 | ||
3908 | ||
3909 | static int wpa_gtk_update(struct wpa_authenticator *wpa_auth, | |
3910 | struct wpa_group *group) | |
3911 | { | |
62e12afc | 3912 | struct wpa_auth_config *conf = &wpa_auth->conf; |
6fc6879b | 3913 | int ret = 0; |
555dcd75 | 3914 | size_t len; |
6fc6879b | 3915 | |
6fc6879b JM |
3916 | os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN); |
3917 | inc_byte_array(group->Counter, WPA_NONCE_LEN); | |
3c7302c2 JM |
3918 | if (wpa_gmk_to_gtk(group->GMK, "Group key expansion", |
3919 | wpa_auth->addr, group->GNonce, | |
3920 | group->GTK[group->GN - 1], group->GTK_len) < 0) | |
3921 | ret = -1; | |
5cb9d5c3 JM |
3922 | wpa_hexdump_key(MSG_DEBUG, "GTK", |
3923 | group->GTK[group->GN - 1], group->GTK_len); | |
6fc6879b | 3924 | |
62e12afc JM |
3925 | if (conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) { |
3926 | len = wpa_cipher_key_len(conf->group_mgmt_cipher); | |
5cb9d5c3 JM |
3927 | os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN); |
3928 | inc_byte_array(group->Counter, WPA_NONCE_LEN); | |
3c7302c2 JM |
3929 | if (wpa_gmk_to_gtk(group->GMK, "IGTK key expansion", |
3930 | wpa_auth->addr, group->GNonce, | |
8dd9f9cd | 3931 | group->IGTK[group->GN_igtk - 4], len) < 0) |
3c7302c2 | 3932 | ret = -1; |
6fc6879b | 3933 | wpa_hexdump_key(MSG_DEBUG, "IGTK", |
8dd9f9cd | 3934 | group->IGTK[group->GN_igtk - 4], len); |
6fc6879b | 3935 | } |
6fc6879b | 3936 | |
62e12afc JM |
3937 | if (conf->ieee80211w != NO_MGMT_FRAME_PROTECTION && |
3938 | conf->beacon_prot) { | |
3939 | len = wpa_cipher_key_len(conf->group_mgmt_cipher); | |
555dcd75 JM |
3940 | os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN); |
3941 | inc_byte_array(group->Counter, WPA_NONCE_LEN); | |
3942 | if (wpa_gmk_to_gtk(group->GMK, "BIGTK key expansion", | |
3943 | wpa_auth->addr, group->GNonce, | |
3944 | group->BIGTK[group->GN_bigtk - 6], len) < 0) | |
3945 | ret = -1; | |
3946 | wpa_hexdump_key(MSG_DEBUG, "BIGTK", | |
3947 | group->BIGTK[group->GN_bigtk - 6], len); | |
3948 | } | |
3949 | ||
6fc6879b JM |
3950 | return ret; |
3951 | } | |
3952 | ||
3953 | ||
3954 | static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth, | |
3955 | struct wpa_group *group) | |
3956 | { | |
f83d3491 JM |
3957 | wpa_printf(MSG_DEBUG, |
3958 | "WPA: group state machine entering state GTK_INIT (VLAN-ID %d)", | |
3959 | group->vlan_id); | |
6fc6879b JM |
3960 | group->changed = FALSE; /* GInit is not cleared here; avoid loop */ |
3961 | group->wpa_group_state = WPA_GROUP_GTK_INIT; | |
3962 | ||
3963 | /* GTK[0..N] = 0 */ | |
3964 | os_memset(group->GTK, 0, sizeof(group->GTK)); | |
3965 | group->GN = 1; | |
3966 | group->GM = 2; | |
6fc6879b JM |
3967 | group->GN_igtk = 4; |
3968 | group->GM_igtk = 5; | |
555dcd75 JM |
3969 | group->GN_bigtk = 6; |
3970 | group->GM_bigtk = 7; | |
6fc6879b JM |
3971 | /* GTK[GN] = CalcGTK() */ |
3972 | wpa_gtk_update(wpa_auth, group); | |
3973 | } | |
3974 | ||
3975 | ||
3976 | static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx) | |
3977 | { | |
473b6f22 MB |
3978 | if (ctx != NULL && ctx != sm->group) |
3979 | return 0; | |
3980 | ||
6fc6879b JM |
3981 | if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) { |
3982 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
3983 | "Not in PTKINITDONE; skip Group Key update"); | |
3c183894 | 3984 | sm->GUpdateStationKeys = FALSE; |
6fc6879b JM |
3985 | return 0; |
3986 | } | |
9663596f JM |
3987 | if (sm->GUpdateStationKeys) { |
3988 | /* | |
3c183894 JM |
3989 | * This should not really happen, so add a debug log entry. |
3990 | * Since we clear the GKeyDoneStations before the loop, the | |
3991 | * station needs to be counted here anyway. | |
9663596f JM |
3992 | */ |
3993 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
f83d3491 | 3994 | "GUpdateStationKeys was already set when marking station for GTK rekeying"); |
9663596f | 3995 | } |
3c183894 | 3996 | |
ad3872a3 | 3997 | /* Do not rekey GTK/IGTK when STA is in WNM-Sleep Mode */ |
d32d94db XC |
3998 | if (sm->is_wnmsleep) |
3999 | return 0; | |
d32d94db | 4000 | |
3c183894 JM |
4001 | sm->group->GKeyDoneStations++; |
4002 | sm->GUpdateStationKeys = TRUE; | |
4003 | ||
6fc6879b JM |
4004 | wpa_sm_step(sm); |
4005 | return 0; | |
4006 | } | |
4007 | ||
4008 | ||
b5bf84ba | 4009 | #ifdef CONFIG_WNM_AP |
ad3872a3 | 4010 | /* update GTK when exiting WNM-Sleep Mode */ |
d32d94db XC |
4011 | void wpa_wnmsleep_rekey_gtk(struct wpa_state_machine *sm) |
4012 | { | |
9385f03f | 4013 | if (!sm || sm->is_wnmsleep) |
d32d94db XC |
4014 | return; |
4015 | ||
4016 | wpa_group_update_sta(sm, NULL); | |
4017 | } | |
4018 | ||
4019 | ||
4020 | void wpa_set_wnmsleep(struct wpa_state_machine *sm, int flag) | |
4021 | { | |
629edfef JM |
4022 | if (sm) |
4023 | sm->is_wnmsleep = !!flag; | |
d32d94db XC |
4024 | } |
4025 | ||
4026 | ||
4027 | int wpa_wnmsleep_gtk_subelem(struct wpa_state_machine *sm, u8 *pos) | |
4028 | { | |
d32d94db | 4029 | struct wpa_group *gsm = sm->group; |
835822d4 | 4030 | u8 *start = pos; |
d32d94db XC |
4031 | |
4032 | /* | |
835822d4 | 4033 | * GTK subelement: |
d32d94db | 4034 | * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] | |
835822d4 | 4035 | * Key[5..32] |
d32d94db | 4036 | */ |
835822d4 JM |
4037 | *pos++ = WNM_SLEEP_SUBELEM_GTK; |
4038 | *pos++ = 11 + gsm->GTK_len; | |
d32d94db | 4039 | /* Key ID in B0-B1 of Key Info */ |
835822d4 JM |
4040 | WPA_PUT_LE16(pos, gsm->GN & 0x03); |
4041 | pos += 2; | |
4042 | *pos++ = gsm->GTK_len; | |
4043 | if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, pos) != 0) | |
d32d94db | 4044 | return 0; |
835822d4 JM |
4045 | pos += 8; |
4046 | os_memcpy(pos, gsm->GTK[gsm->GN - 1], gsm->GTK_len); | |
4047 | pos += gsm->GTK_len; | |
d32d94db | 4048 | |
835822d4 JM |
4049 | wpa_printf(MSG_DEBUG, "WNM: GTK Key ID %u in WNM-Sleep Mode exit", |
4050 | gsm->GN); | |
4051 | wpa_hexdump_key(MSG_DEBUG, "WNM: GTK in WNM-Sleep Mode exit", | |
d32d94db | 4052 | gsm->GTK[gsm->GN - 1], gsm->GTK_len); |
d32d94db | 4053 | |
835822d4 | 4054 | return pos - start; |
d32d94db XC |
4055 | } |
4056 | ||
4057 | ||
d32d94db XC |
4058 | int wpa_wnmsleep_igtk_subelem(struct wpa_state_machine *sm, u8 *pos) |
4059 | { | |
d32d94db | 4060 | struct wpa_group *gsm = sm->group; |
835822d4 | 4061 | u8 *start = pos; |
8dd9f9cd | 4062 | size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher); |
d32d94db | 4063 | |
835822d4 JM |
4064 | /* |
4065 | * IGTK subelement: | |
4066 | * Sub-elem ID[1] | Length[1] | KeyID[2] | PN[6] | Key[16] | |
4067 | */ | |
4068 | *pos++ = WNM_SLEEP_SUBELEM_IGTK; | |
8dd9f9cd | 4069 | *pos++ = 2 + 6 + len; |
835822d4 JM |
4070 | WPA_PUT_LE16(pos, gsm->GN_igtk); |
4071 | pos += 2; | |
4072 | if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos) != 0) | |
d32d94db | 4073 | return 0; |
835822d4 | 4074 | pos += 6; |
d32d94db | 4075 | |
8dd9f9cd JM |
4076 | os_memcpy(pos, gsm->IGTK[gsm->GN_igtk - 4], len); |
4077 | pos += len; | |
d32d94db | 4078 | |
835822d4 JM |
4079 | wpa_printf(MSG_DEBUG, "WNM: IGTK Key ID %u in WNM-Sleep Mode exit", |
4080 | gsm->GN_igtk); | |
4081 | wpa_hexdump_key(MSG_DEBUG, "WNM: IGTK in WNM-Sleep Mode exit", | |
8dd9f9cd | 4082 | gsm->IGTK[gsm->GN_igtk - 4], len); |
d32d94db | 4083 | |
835822d4 | 4084 | return pos - start; |
d32d94db | 4085 | } |
7d2ed8ba | 4086 | |
16889aff JM |
4087 | |
4088 | int wpa_wnmsleep_bigtk_subelem(struct wpa_state_machine *sm, u8 *pos) | |
4089 | { | |
4090 | struct wpa_group *gsm = sm->group; | |
4091 | u8 *start = pos; | |
4092 | size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher); | |
4093 | ||
4094 | /* | |
4095 | * BIGTK subelement: | |
4096 | * Sub-elem ID[1] | Length[1] | KeyID[2] | PN[6] | Key[16] | |
4097 | */ | |
4098 | *pos++ = WNM_SLEEP_SUBELEM_BIGTK; | |
4099 | *pos++ = 2 + 6 + len; | |
4100 | WPA_PUT_LE16(pos, gsm->GN_bigtk); | |
4101 | pos += 2; | |
4102 | if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_bigtk, pos) != 0) | |
4103 | return 0; | |
4104 | pos += 6; | |
4105 | ||
4106 | os_memcpy(pos, gsm->BIGTK[gsm->GN_bigtk - 6], len); | |
4107 | pos += len; | |
4108 | ||
4109 | wpa_printf(MSG_DEBUG, "WNM: BIGTK Key ID %u in WNM-Sleep Mode exit", | |
4110 | gsm->GN_bigtk); | |
4111 | wpa_hexdump_key(MSG_DEBUG, "WNM: BIGTK in WNM-Sleep Mode exit", | |
4112 | gsm->IGTK[gsm->GN_bigtk - 6], len); | |
4113 | ||
4114 | return pos - start; | |
4115 | } | |
4116 | ||
b5bf84ba | 4117 | #endif /* CONFIG_WNM_AP */ |
d32d94db XC |
4118 | |
4119 | ||
6fc6879b JM |
4120 | static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth, |
4121 | struct wpa_group *group) | |
4122 | { | |
4123 | int tmp; | |
4124 | ||
f83d3491 JM |
4125 | wpa_printf(MSG_DEBUG, |
4126 | "WPA: group state machine entering state SETKEYS (VLAN-ID %d)", | |
4127 | group->vlan_id); | |
6fc6879b JM |
4128 | group->changed = TRUE; |
4129 | group->wpa_group_state = WPA_GROUP_SETKEYS; | |
4130 | group->GTKReKey = FALSE; | |
4131 | tmp = group->GM; | |
4132 | group->GM = group->GN; | |
4133 | group->GN = tmp; | |
6fc6879b JM |
4134 | tmp = group->GM_igtk; |
4135 | group->GM_igtk = group->GN_igtk; | |
4136 | group->GN_igtk = tmp; | |
555dcd75 JM |
4137 | tmp = group->GM_bigtk; |
4138 | group->GM_bigtk = group->GN_bigtk; | |
4139 | group->GN_bigtk = tmp; | |
6fc6879b JM |
4140 | /* "GKeyDoneStations = GNoStations" is done in more robust way by |
4141 | * counting the STAs that are marked with GUpdateStationKeys instead of | |
4142 | * including all STAs that could be in not-yet-completed state. */ | |
4143 | wpa_gtk_update(wpa_auth, group); | |
4144 | ||
3c183894 | 4145 | if (group->GKeyDoneStations) { |
f83d3491 JM |
4146 | wpa_printf(MSG_DEBUG, |
4147 | "wpa_group_setkeys: Unexpected GKeyDoneStations=%d when starting new GTK rekey", | |
3c183894 JM |
4148 | group->GKeyDoneStations); |
4149 | group->GKeyDoneStations = 0; | |
4150 | } | |
473b6f22 | 4151 | wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, group); |
6fc6879b JM |
4152 | wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d", |
4153 | group->GKeyDoneStations); | |
4154 | } | |
4155 | ||
4156 | ||
1bdb7ab3 JM |
4157 | static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth, |
4158 | struct wpa_group *group) | |
6fc6879b | 4159 | { |
62e12afc | 4160 | struct wpa_auth_config *conf = &wpa_auth->conf; |
3c7302c2 JM |
4161 | int ret = 0; |
4162 | ||
3c7302c2 | 4163 | if (wpa_auth_set_key(wpa_auth, group->vlan_id, |
62e12afc | 4164 | wpa_cipher_to_alg(conf->wpa_group), |
0382097e | 4165 | broadcast_ether_addr, group->GN, |
a919a260 AW |
4166 | group->GTK[group->GN - 1], group->GTK_len, |
4167 | KEY_FLAG_GROUP_TX_DEFAULT) < 0) | |
3c7302c2 | 4168 | ret = -1; |
6fc6879b | 4169 | |
62e12afc | 4170 | if (conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) { |
8dd9f9cd JM |
4171 | enum wpa_alg alg; |
4172 | size_t len; | |
4173 | ||
62e12afc JM |
4174 | alg = wpa_cipher_to_alg(conf->group_mgmt_cipher); |
4175 | len = wpa_cipher_key_len(conf->group_mgmt_cipher); | |
8dd9f9cd JM |
4176 | |
4177 | if (ret == 0 && | |
4178 | wpa_auth_set_key(wpa_auth, group->vlan_id, alg, | |
4179 | broadcast_ether_addr, group->GN_igtk, | |
a919a260 AW |
4180 | group->IGTK[group->GN_igtk - 4], len, |
4181 | KEY_FLAG_GROUP_TX_DEFAULT) < 0) | |
8dd9f9cd | 4182 | ret = -1; |
555dcd75 | 4183 | |
62e12afc | 4184 | if (ret == 0 && conf->beacon_prot && |
555dcd75 JM |
4185 | wpa_auth_set_key(wpa_auth, group->vlan_id, alg, |
4186 | broadcast_ether_addr, group->GN_bigtk, | |
4187 | group->BIGTK[group->GN_bigtk - 6], len, | |
4188 | KEY_FLAG_GROUP_TX_DEFAULT) < 0) | |
4189 | ret = -1; | |
8dd9f9cd | 4190 | } |
3c7302c2 JM |
4191 | |
4192 | return ret; | |
6fc6879b JM |
4193 | } |
4194 | ||
4195 | ||
7d7f7be2 JM |
4196 | static int wpa_group_disconnect_cb(struct wpa_state_machine *sm, void *ctx) |
4197 | { | |
4198 | if (sm->group == ctx) { | |
4199 | wpa_printf(MSG_DEBUG, "WPA: Mark STA " MACSTR | |
f83d3491 | 4200 | " for disconnection due to fatal failure", |
7d7f7be2 JM |
4201 | MAC2STR(sm->addr)); |
4202 | sm->Disconnect = TRUE; | |
4203 | } | |
4204 | ||
4205 | return 0; | |
4206 | } | |
4207 | ||
4208 | ||
4209 | static void wpa_group_fatal_failure(struct wpa_authenticator *wpa_auth, | |
4210 | struct wpa_group *group) | |
4211 | { | |
f83d3491 JM |
4212 | wpa_printf(MSG_DEBUG, |
4213 | "WPA: group state machine entering state FATAL_FAILURE"); | |
7d7f7be2 JM |
4214 | group->changed = TRUE; |
4215 | group->wpa_group_state = WPA_GROUP_FATAL_FAILURE; | |
4216 | wpa_auth_for_each_sta(wpa_auth, wpa_group_disconnect_cb, group); | |
4217 | } | |
4218 | ||
4219 | ||
1bdb7ab3 JM |
4220 | static int wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth, |
4221 | struct wpa_group *group) | |
4222 | { | |
f83d3491 JM |
4223 | wpa_printf(MSG_DEBUG, |
4224 | "WPA: group state machine entering state SETKEYSDONE (VLAN-ID %d)", | |
4225 | group->vlan_id); | |
1bdb7ab3 JM |
4226 | group->changed = TRUE; |
4227 | group->wpa_group_state = WPA_GROUP_SETKEYSDONE; | |
4228 | ||
7d7f7be2 JM |
4229 | if (wpa_group_config_group_keys(wpa_auth, group) < 0) { |
4230 | wpa_group_fatal_failure(wpa_auth, group); | |
1bdb7ab3 | 4231 | return -1; |
7d7f7be2 | 4232 | } |
1bdb7ab3 JM |
4233 | |
4234 | return 0; | |
4235 | } | |
4236 | ||
4237 | ||
6fc6879b JM |
4238 | static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth, |
4239 | struct wpa_group *group) | |
4240 | { | |
4241 | if (group->GInit) { | |
4242 | wpa_group_gtk_init(wpa_auth, group); | |
7d7f7be2 JM |
4243 | } else if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) { |
4244 | /* Do not allow group operations */ | |
6fc6879b JM |
4245 | } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT && |
4246 | group->GTKAuthenticator) { | |
4247 | wpa_group_setkeysdone(wpa_auth, group); | |
4248 | } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE && | |
4249 | group->GTKReKey) { | |
4250 | wpa_group_setkeys(wpa_auth, group); | |
4251 | } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) { | |
4252 | if (group->GKeyDoneStations == 0) | |
4253 | wpa_group_setkeysdone(wpa_auth, group); | |
4254 | else if (group->GTKReKey) | |
4255 | wpa_group_setkeys(wpa_auth, group); | |
4256 | } | |
4257 | } | |
4258 | ||
4259 | ||
e4a6ea1d | 4260 | static int wpa_sm_step(struct wpa_state_machine *sm) |
6fc6879b | 4261 | { |
9385f03f | 4262 | if (!sm) |
e4a6ea1d | 4263 | return 0; |
6fc6879b JM |
4264 | |
4265 | if (sm->in_step_loop) { | |
4266 | /* This should not happen, but if it does, make sure we do not | |
4267 | * end up freeing the state machine too early by exiting the | |
4268 | * recursive call. */ | |
4269 | wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively"); | |
e4a6ea1d | 4270 | return 0; |
6fc6879b JM |
4271 | } |
4272 | ||
4273 | sm->in_step_loop = 1; | |
4274 | do { | |
4275 | if (sm->pending_deinit) | |
4276 | break; | |
4277 | ||
4278 | sm->changed = FALSE; | |
4279 | sm->wpa_auth->group->changed = FALSE; | |
4280 | ||
4281 | SM_STEP_RUN(WPA_PTK); | |
4282 | if (sm->pending_deinit) | |
4283 | break; | |
4284 | SM_STEP_RUN(WPA_PTK_GROUP); | |
4285 | if (sm->pending_deinit) | |
4286 | break; | |
4287 | wpa_group_sm_step(sm->wpa_auth, sm->group); | |
4288 | } while (sm->changed || sm->wpa_auth->group->changed); | |
4289 | sm->in_step_loop = 0; | |
4290 | ||
4291 | if (sm->pending_deinit) { | |
f83d3491 JM |
4292 | wpa_printf(MSG_DEBUG, |
4293 | "WPA: Completing pending STA state machine deinit for " | |
4294 | MACSTR, MAC2STR(sm->addr)); | |
6fc6879b | 4295 | wpa_free_sta_sm(sm); |
e4a6ea1d | 4296 | return 1; |
6fc6879b | 4297 | } |
e4a6ea1d | 4298 | return 0; |
6fc6879b JM |
4299 | } |
4300 | ||
4301 | ||
4302 | static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx) | |
4303 | { | |
4304 | struct wpa_state_machine *sm = eloop_ctx; | |
4305 | wpa_sm_step(sm); | |
4306 | } | |
4307 | ||
4308 | ||
4309 | void wpa_auth_sm_notify(struct wpa_state_machine *sm) | |
4310 | { | |
9385f03f | 4311 | if (!sm) |
6fc6879b JM |
4312 | return; |
4313 | eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL); | |
4314 | } | |
4315 | ||
4316 | ||
4317 | void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth) | |
4318 | { | |
4319 | int tmp, i; | |
4320 | struct wpa_group *group; | |
4321 | ||
9385f03f | 4322 | if (!wpa_auth) |
6fc6879b JM |
4323 | return; |
4324 | ||
4325 | group = wpa_auth->group; | |
4326 | ||
4327 | for (i = 0; i < 2; i++) { | |
4328 | tmp = group->GM; | |
4329 | group->GM = group->GN; | |
4330 | group->GN = tmp; | |
6fc6879b JM |
4331 | tmp = group->GM_igtk; |
4332 | group->GM_igtk = group->GN_igtk; | |
4333 | group->GN_igtk = tmp; | |
555dcd75 JM |
4334 | tmp = group->GM_bigtk; |
4335 | group->GM_bigtk = group->GN_bigtk; | |
4336 | group->GN_bigtk = tmp; | |
6fc6879b | 4337 | wpa_gtk_update(wpa_auth, group); |
9354e594 | 4338 | wpa_group_config_group_keys(wpa_auth, group); |
6fc6879b JM |
4339 | } |
4340 | } | |
4341 | ||
4342 | ||
a6da824b | 4343 | static const char * wpa_bool_txt(int val) |
6fc6879b | 4344 | { |
a6da824b | 4345 | return val ? "TRUE" : "FALSE"; |
6fc6879b JM |
4346 | } |
4347 | ||
4348 | ||
6fc6879b JM |
4349 | #define RSN_SUITE "%02x-%02x-%02x-%d" |
4350 | #define RSN_SUITE_ARG(s) \ | |
4351 | ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff | |
4352 | ||
4353 | int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen) | |
4354 | { | |
62e12afc | 4355 | struct wpa_auth_config *conf; |
6fc6879b JM |
4356 | int len = 0, ret; |
4357 | char pmkid_txt[PMKID_LEN * 2 + 1]; | |
8ce58ceb IH |
4358 | #ifdef CONFIG_RSN_PREAUTH |
4359 | const int preauth = 1; | |
4360 | #else /* CONFIG_RSN_PREAUTH */ | |
4361 | const int preauth = 0; | |
4362 | #endif /* CONFIG_RSN_PREAUTH */ | |
6fc6879b | 4363 | |
9385f03f | 4364 | if (!wpa_auth) |
6fc6879b | 4365 | return len; |
62e12afc | 4366 | conf = &wpa_auth->conf; |
6fc6879b JM |
4367 | |
4368 | ret = os_snprintf(buf + len, buflen - len, | |
4369 | "dot11RSNAOptionImplemented=TRUE\n" | |
8ce58ceb | 4370 | "dot11RSNAPreauthenticationImplemented=%s\n" |
6fc6879b JM |
4371 | "dot11RSNAEnabled=%s\n" |
4372 | "dot11RSNAPreauthenticationEnabled=%s\n", | |
8ce58ceb | 4373 | wpa_bool_txt(preauth), |
62e12afc JM |
4374 | wpa_bool_txt(conf->wpa & WPA_PROTO_RSN), |
4375 | wpa_bool_txt(conf->rsn_preauth)); | |
d85e1fc8 | 4376 | if (os_snprintf_error(buflen - len, ret)) |
6fc6879b JM |
4377 | return len; |
4378 | len += ret; | |
4379 | ||
4380 | wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt), | |
4381 | wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN); | |
4382 | ||
4383 | ret = os_snprintf( | |
4384 | buf + len, buflen - len, | |
4385 | "dot11RSNAConfigVersion=%u\n" | |
4386 | "dot11RSNAConfigPairwiseKeysSupported=9999\n" | |
4387 | /* FIX: dot11RSNAConfigGroupCipher */ | |
4388 | /* FIX: dot11RSNAConfigGroupRekeyMethod */ | |
4389 | /* FIX: dot11RSNAConfigGroupRekeyTime */ | |
4390 | /* FIX: dot11RSNAConfigGroupRekeyPackets */ | |
4391 | "dot11RSNAConfigGroupRekeyStrict=%u\n" | |
4392 | "dot11RSNAConfigGroupUpdateCount=%u\n" | |
4393 | "dot11RSNAConfigPairwiseUpdateCount=%u\n" | |
4394 | "dot11RSNAConfigGroupCipherSize=%u\n" | |
4395 | "dot11RSNAConfigPMKLifetime=%u\n" | |
4396 | "dot11RSNAConfigPMKReauthThreshold=%u\n" | |
4397 | "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n" | |
4398 | "dot11RSNAConfigSATimeout=%u\n" | |
4399 | "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n" | |
4400 | "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n" | |
4401 | "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n" | |
4402 | "dot11RSNAPMKIDUsed=%s\n" | |
4403 | "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n" | |
4404 | "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n" | |
4405 | "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n" | |
4406 | "dot11RSNATKIPCounterMeasuresInvoked=%u\n" | |
4407 | "dot11RSNA4WayHandshakeFailures=%u\n" | |
4408 | "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n", | |
4409 | RSN_VERSION, | |
62e12afc JM |
4410 | !!conf->wpa_strict_rekey, |
4411 | conf->wpa_group_update_count, | |
4412 | conf->wpa_pairwise_update_count, | |
4413 | wpa_cipher_key_len(conf->wpa_group) * 8, | |
6fc6879b JM |
4414 | dot11RSNAConfigPMKLifetime, |
4415 | dot11RSNAConfigPMKReauthThreshold, | |
4416 | dot11RSNAConfigSATimeout, | |
4417 | RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected), | |
4418 | RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected), | |
4419 | RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected), | |
4420 | pmkid_txt, | |
4421 | RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested), | |
4422 | RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested), | |
4423 | RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested), | |
4424 | wpa_auth->dot11RSNATKIPCounterMeasuresInvoked, | |
4425 | wpa_auth->dot11RSNA4WayHandshakeFailures); | |
d85e1fc8 | 4426 | if (os_snprintf_error(buflen - len, ret)) |
6fc6879b JM |
4427 | return len; |
4428 | len += ret; | |
4429 | ||
4430 | /* TODO: dot11RSNAConfigPairwiseCiphersTable */ | |
4431 | /* TODO: dot11RSNAConfigAuthenticationSuitesTable */ | |
4432 | ||
4433 | /* Private MIB */ | |
4434 | ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n", | |
4435 | wpa_auth->group->wpa_group_state); | |
d85e1fc8 | 4436 | if (os_snprintf_error(buflen - len, ret)) |
6fc6879b JM |
4437 | return len; |
4438 | len += ret; | |
4439 | ||
4440 | return len; | |
4441 | } | |
4442 | ||
4443 | ||
4444 | int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen) | |
4445 | { | |
4446 | int len = 0, ret; | |
4447 | u32 pairwise = 0; | |
4448 | ||
9385f03f | 4449 | if (!sm) |
6fc6879b JM |
4450 | return 0; |
4451 | ||
4452 | /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */ | |
4453 | ||
4454 | /* dot11RSNAStatsEntry */ | |
4455 | ||
c3550295 JM |
4456 | pairwise = wpa_cipher_to_suite(sm->wpa == WPA_VERSION_WPA2 ? |
4457 | WPA_PROTO_RSN : WPA_PROTO_WPA, | |
4458 | sm->pairwise); | |
4459 | if (pairwise == 0) | |
6fc6879b JM |
4460 | return 0; |
4461 | ||
4462 | ret = os_snprintf( | |
4463 | buf + len, buflen - len, | |
4464 | /* TODO: dot11RSNAStatsIndex */ | |
4465 | "dot11RSNAStatsSTAAddress=" MACSTR "\n" | |
4466 | "dot11RSNAStatsVersion=1\n" | |
4467 | "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n" | |
4468 | /* TODO: dot11RSNAStatsTKIPICVErrors */ | |
4469 | "dot11RSNAStatsTKIPLocalMICFailures=%u\n" | |
d9040cdb | 4470 | "dot11RSNAStatsTKIPRemoteMICFailures=%u\n" |
6fc6879b JM |
4471 | /* TODO: dot11RSNAStatsCCMPReplays */ |
4472 | /* TODO: dot11RSNAStatsCCMPDecryptErrors */ | |
4473 | /* TODO: dot11RSNAStatsTKIPReplays */, | |
4474 | MAC2STR(sm->addr), | |
4475 | RSN_SUITE_ARG(pairwise), | |
4476 | sm->dot11RSNAStatsTKIPLocalMICFailures, | |
4477 | sm->dot11RSNAStatsTKIPRemoteMICFailures); | |
d85e1fc8 | 4478 | if (os_snprintf_error(buflen - len, ret)) |
6fc6879b JM |
4479 | return len; |
4480 | len += ret; | |
4481 | ||
4482 | /* Private MIB */ | |
4483 | ret = os_snprintf(buf + len, buflen - len, | |
d1b1f9fa JM |
4484 | "wpa=%d\n" |
4485 | "AKMSuiteSelector=" RSN_SUITE "\n" | |
6fc6879b JM |
4486 | "hostapdWPAPTKState=%d\n" |
4487 | "hostapdWPAPTKGroupState=%d\n", | |
d1b1f9fa JM |
4488 | sm->wpa, |
4489 | RSN_SUITE_ARG(wpa_akm_to_suite(sm->wpa_key_mgmt)), | |
6fc6879b JM |
4490 | sm->wpa_ptk_state, |
4491 | sm->wpa_ptk_group_state); | |
d85e1fc8 | 4492 | if (os_snprintf_error(buflen - len, ret)) |
6fc6879b JM |
4493 | return len; |
4494 | len += ret; | |
4495 | ||
4496 | return len; | |
4497 | } | |
4498 | ||
4499 | ||
4500 | void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth) | |
4501 | { | |
4502 | if (wpa_auth) | |
4503 | wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++; | |
4504 | } | |
4505 | ||
4506 | ||
4507 | int wpa_auth_pairwise_set(struct wpa_state_machine *sm) | |
4508 | { | |
4509 | return sm && sm->pairwise_set; | |
4510 | } | |
4511 | ||
4512 | ||
ff36ff00 JM |
4513 | int wpa_auth_get_pairwise(struct wpa_state_machine *sm) |
4514 | { | |
4515 | return sm->pairwise; | |
4516 | } | |
4517 | ||
4518 | ||
b08c9ad0 MK |
4519 | const u8 * wpa_auth_get_pmk(struct wpa_state_machine *sm, int *len) |
4520 | { | |
4521 | if (!sm) | |
4522 | return NULL; | |
4523 | *len = sm->pmk_len; | |
4524 | return sm->PMK; | |
4525 | } | |
4526 | ||
4527 | ||
6fc6879b JM |
4528 | int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm) |
4529 | { | |
9385f03f | 4530 | if (!sm) |
6fc6879b JM |
4531 | return -1; |
4532 | return sm->wpa_key_mgmt; | |
4533 | } | |
4534 | ||
4535 | ||
4536 | int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm) | |
4537 | { | |
9385f03f | 4538 | if (!sm) |
6fc6879b JM |
4539 | return 0; |
4540 | return sm->wpa; | |
4541 | } | |
4542 | ||
4543 | ||
0e3bd7ac MV |
4544 | int wpa_auth_sta_ft_tk_already_set(struct wpa_state_machine *sm) |
4545 | { | |
4546 | if (!sm || !wpa_key_mgmt_ft(sm->wpa_key_mgmt)) | |
4547 | return 0; | |
4548 | return sm->tk_already_set; | |
4549 | } | |
4550 | ||
4551 | ||
2f1357fb JM |
4552 | int wpa_auth_sta_fils_tk_already_set(struct wpa_state_machine *sm) |
4553 | { | |
4554 | if (!sm || !wpa_key_mgmt_fils(sm->wpa_key_mgmt)) | |
4555 | return 0; | |
4556 | return sm->tk_already_set; | |
4557 | } | |
4558 | ||
4559 | ||
6fc6879b JM |
4560 | int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm, |
4561 | struct rsn_pmksa_cache_entry *entry) | |
4562 | { | |
9385f03f | 4563 | if (!sm || sm->pmksa != entry) |
6fc6879b JM |
4564 | return -1; |
4565 | sm->pmksa = NULL; | |
4566 | return 0; | |
4567 | } | |
4568 | ||
4569 | ||
4570 | struct rsn_pmksa_cache_entry * | |
4571 | wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm) | |
4572 | { | |
4573 | return sm ? sm->pmksa : NULL; | |
4574 | } | |
4575 | ||
4576 | ||
4577 | void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm) | |
4578 | { | |
4579 | if (sm) | |
4580 | sm->dot11RSNAStatsTKIPLocalMICFailures++; | |
4581 | } | |
4582 | ||
4583 | ||
4584 | const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len) | |
4585 | { | |
9385f03f | 4586 | if (!wpa_auth) |
6fc6879b JM |
4587 | return NULL; |
4588 | *len = wpa_auth->wpa_ie_len; | |
4589 | return wpa_auth->wpa_ie; | |
4590 | } | |
4591 | ||
4592 | ||
4593 | int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk, | |
207976f0 | 4594 | unsigned int pmk_len, |
6fc6879b JM |
4595 | int session_timeout, struct eapol_state_machine *eapol) |
4596 | { | |
9385f03f | 4597 | if (!sm || sm->wpa != WPA_VERSION_WPA2 || |
cb465555 | 4598 | sm->wpa_auth->conf.disable_pmksa_caching) |
6fc6879b JM |
4599 | return -1; |
4600 | ||
64f48093 JM |
4601 | #ifdef CONFIG_IEEE80211R_AP |
4602 | if (pmk_len >= 2 * PMK_LEN && wpa_key_mgmt_ft(sm->wpa_key_mgmt) && | |
4603 | wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) && | |
4604 | !wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) { | |
4605 | /* Cache MPMK/XXKey instead of initial part from MSK */ | |
4606 | pmk = pmk + PMK_LEN; | |
4607 | pmk_len = PMK_LEN; | |
4608 | } else | |
4609 | #endif /* CONFIG_IEEE80211R_AP */ | |
834c5d68 | 4610 | if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) { |
207976f0 JM |
4611 | if (pmk_len > PMK_LEN_SUITE_B_192) |
4612 | pmk_len = PMK_LEN_SUITE_B_192; | |
4613 | } else if (pmk_len > PMK_LEN) { | |
4614 | pmk_len = PMK_LEN; | |
4615 | } | |
4616 | ||
64f48093 | 4617 | wpa_hexdump_key(MSG_DEBUG, "RSN: Cache PMK", pmk, pmk_len); |
70c93963 | 4618 | if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, pmk_len, NULL, |
98cd3d1c | 4619 | sm->PTK.kck, sm->PTK.kck_len, |
4bb081f1 JM |
4620 | sm->wpa_auth->addr, sm->addr, session_timeout, |
4621 | eapol, sm->wpa_key_mgmt)) | |
6fc6879b JM |
4622 | return 0; |
4623 | ||
4624 | return -1; | |
4625 | } | |
4626 | ||
4627 | ||
4628 | int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth, | |
4629 | const u8 *pmk, size_t len, const u8 *sta_addr, | |
4630 | int session_timeout, | |
4631 | struct eapol_state_machine *eapol) | |
4632 | { | |
9385f03f | 4633 | if (!wpa_auth) |
6fc6879b JM |
4634 | return -1; |
4635 | ||
64f48093 | 4636 | wpa_hexdump_key(MSG_DEBUG, "RSN: Cache PMK from preauth", pmk, len); |
70c93963 | 4637 | if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len, NULL, |
087a1f4e JM |
4638 | NULL, 0, |
4639 | wpa_auth->addr, | |
4bb081f1 JM |
4640 | sta_addr, session_timeout, eapol, |
4641 | WPA_KEY_MGMT_IEEE8021X)) | |
6fc6879b JM |
4642 | return 0; |
4643 | ||
4644 | return -1; | |
4645 | } | |
4646 | ||
4647 | ||
f2991170 | 4648 | int wpa_auth_pmksa_add_sae(struct wpa_authenticator *wpa_auth, const u8 *addr, |
70c93963 | 4649 | const u8 *pmk, const u8 *pmkid) |
f2991170 JM |
4650 | { |
4651 | if (wpa_auth->conf.disable_pmksa_caching) | |
4652 | return -1; | |
4653 | ||
64f48093 | 4654 | wpa_hexdump_key(MSG_DEBUG, "RSN: Cache PMK from SAE", pmk, PMK_LEN); |
70c93963 | 4655 | if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, PMK_LEN, pmkid, |
087a1f4e | 4656 | NULL, 0, |
f2991170 JM |
4657 | wpa_auth->addr, addr, 0, NULL, |
4658 | WPA_KEY_MGMT_SAE)) | |
4659 | return 0; | |
4660 | ||
4661 | return -1; | |
4662 | } | |
4663 | ||
4664 | ||
9d94e4bb JM |
4665 | void wpa_auth_add_sae_pmkid(struct wpa_state_machine *sm, const u8 *pmkid) |
4666 | { | |
4667 | os_memcpy(sm->pmkid, pmkid, PMKID_LEN); | |
4668 | sm->pmkid_set = 1; | |
4669 | } | |
4670 | ||
4671 | ||
0c52953b JM |
4672 | int wpa_auth_pmksa_add2(struct wpa_authenticator *wpa_auth, const u8 *addr, |
4673 | const u8 *pmk, size_t pmk_len, const u8 *pmkid, | |
4674 | int session_timeout, int akmp) | |
4675 | { | |
4676 | if (wpa_auth->conf.disable_pmksa_caching) | |
4677 | return -1; | |
4678 | ||
64f48093 | 4679 | wpa_hexdump_key(MSG_DEBUG, "RSN: Cache PMK (2)", pmk, PMK_LEN); |
0c52953b JM |
4680 | if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, pmk_len, pmkid, |
4681 | NULL, 0, wpa_auth->addr, addr, session_timeout, | |
4682 | NULL, akmp)) | |
4683 | return 0; | |
4684 | ||
4685 | return -1; | |
4686 | } | |
4687 | ||
4688 | ||
901d1fe1 JM |
4689 | void wpa_auth_pmksa_remove(struct wpa_authenticator *wpa_auth, |
4690 | const u8 *sta_addr) | |
4691 | { | |
4692 | struct rsn_pmksa_cache_entry *pmksa; | |
4693 | ||
9385f03f | 4694 | if (!wpa_auth || !wpa_auth->pmksa) |
901d1fe1 JM |
4695 | return; |
4696 | pmksa = pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, NULL); | |
4697 | if (pmksa) { | |
4698 | wpa_printf(MSG_DEBUG, "WPA: Remove PMKSA cache entry for " | |
4699 | MACSTR " based on request", MAC2STR(sta_addr)); | |
4700 | pmksa_cache_free_entry(wpa_auth->pmksa, pmksa); | |
4701 | } | |
4702 | } | |
4703 | ||
4704 | ||
b8daac18 MH |
4705 | int wpa_auth_pmksa_list(struct wpa_authenticator *wpa_auth, char *buf, |
4706 | size_t len) | |
4707 | { | |
4708 | if (!wpa_auth || !wpa_auth->pmksa) | |
4709 | return 0; | |
4710 | return pmksa_cache_auth_list(wpa_auth->pmksa, buf, len); | |
4711 | } | |
4712 | ||
4713 | ||
4c522c77 MH |
4714 | void wpa_auth_pmksa_flush(struct wpa_authenticator *wpa_auth) |
4715 | { | |
4716 | if (wpa_auth && wpa_auth->pmksa) | |
4717 | pmksa_cache_auth_flush(wpa_auth->pmksa); | |
4718 | } | |
4719 | ||
4720 | ||
4d77d80e MH |
4721 | #ifdef CONFIG_PMKSA_CACHE_EXTERNAL |
4722 | #ifdef CONFIG_MESH | |
4723 | ||
4724 | int wpa_auth_pmksa_list_mesh(struct wpa_authenticator *wpa_auth, const u8 *addr, | |
4725 | char *buf, size_t len) | |
4726 | { | |
4727 | if (!wpa_auth || !wpa_auth->pmksa) | |
4728 | return 0; | |
4729 | ||
4730 | return pmksa_cache_auth_list_mesh(wpa_auth->pmksa, addr, buf, len); | |
4731 | } | |
4732 | ||
4733 | ||
4734 | struct rsn_pmksa_cache_entry * | |
4735 | wpa_auth_pmksa_create_entry(const u8 *aa, const u8 *spa, const u8 *pmk, | |
4736 | const u8 *pmkid, int expiration) | |
4737 | { | |
4738 | struct rsn_pmksa_cache_entry *entry; | |
4739 | struct os_reltime now; | |
4740 | ||
4741 | entry = pmksa_cache_auth_create_entry(pmk, PMK_LEN, pmkid, NULL, 0, aa, | |
4742 | spa, 0, NULL, WPA_KEY_MGMT_SAE); | |
4743 | if (!entry) | |
4744 | return NULL; | |
4745 | ||
4746 | os_get_reltime(&now); | |
4747 | entry->expiration = now.sec + expiration; | |
4748 | return entry; | |
4749 | } | |
4750 | ||
4751 | ||
4752 | int wpa_auth_pmksa_add_entry(struct wpa_authenticator *wpa_auth, | |
4753 | struct rsn_pmksa_cache_entry *entry) | |
4754 | { | |
4755 | int ret; | |
4756 | ||
4757 | if (!wpa_auth || !wpa_auth->pmksa) | |
4758 | return -1; | |
4759 | ||
4760 | ret = pmksa_cache_auth_add_entry(wpa_auth->pmksa, entry); | |
4761 | if (ret < 0) | |
4762 | wpa_printf(MSG_DEBUG, | |
4763 | "RSN: Failed to store external PMKSA cache for " | |
4764 | MACSTR, MAC2STR(entry->spa)); | |
4765 | ||
4766 | return ret; | |
4767 | } | |
4768 | ||
4769 | #endif /* CONFIG_MESH */ | |
4770 | #endif /* CONFIG_PMKSA_CACHE_EXTERNAL */ | |
4771 | ||
4772 | ||
9f2cf23e | 4773 | struct rsn_pmksa_cache_entry * |
c1bd4bac JM |
4774 | wpa_auth_pmksa_get(struct wpa_authenticator *wpa_auth, const u8 *sta_addr, |
4775 | const u8 *pmkid) | |
9f2cf23e MH |
4776 | { |
4777 | if (!wpa_auth || !wpa_auth->pmksa) | |
4778 | return NULL; | |
c1bd4bac | 4779 | return pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, pmkid); |
9f2cf23e MH |
4780 | } |
4781 | ||
4782 | ||
4783 | void wpa_auth_pmksa_set_to_sm(struct rsn_pmksa_cache_entry *pmksa, | |
4784 | struct wpa_state_machine *sm, | |
4785 | struct wpa_authenticator *wpa_auth, | |
4786 | u8 *pmkid, u8 *pmk) | |
4787 | { | |
4788 | if (!sm) | |
4789 | return; | |
4790 | ||
4791 | sm->pmksa = pmksa; | |
8854f90b JM |
4792 | os_memcpy(pmk, pmksa->pmk, PMK_LEN); |
4793 | os_memcpy(pmkid, pmksa->pmkid, PMKID_LEN); | |
4794 | os_memcpy(wpa_auth->dot11RSNAPMKIDUsed, pmksa->pmkid, PMKID_LEN); | |
9f2cf23e MH |
4795 | } |
4796 | ||
4797 | ||
a0ad9e8c MB |
4798 | /* |
4799 | * Remove and free the group from wpa_authenticator. This is triggered by a | |
4800 | * callback to make sure nobody is currently iterating the group list while it | |
4801 | * gets modified. | |
4802 | */ | |
4803 | static void wpa_group_free(struct wpa_authenticator *wpa_auth, | |
4804 | struct wpa_group *group) | |
4805 | { | |
4806 | struct wpa_group *prev = wpa_auth->group; | |
4807 | ||
4808 | wpa_printf(MSG_DEBUG, "WPA: Remove group state machine for VLAN-ID %d", | |
4809 | group->vlan_id); | |
4810 | ||
4811 | while (prev) { | |
4812 | if (prev->next == group) { | |
4813 | /* This never frees the special first group as needed */ | |
4814 | prev->next = group->next; | |
4815 | os_free(group); | |
4816 | break; | |
4817 | } | |
4818 | prev = prev->next; | |
4819 | } | |
4820 | ||
4821 | } | |
4822 | ||
4823 | ||
4824 | /* Increase the reference counter for group */ | |
4825 | static void wpa_group_get(struct wpa_authenticator *wpa_auth, | |
4826 | struct wpa_group *group) | |
4827 | { | |
4828 | /* Skip the special first group */ | |
4829 | if (wpa_auth->group == group) | |
4830 | return; | |
4831 | ||
4832 | group->references++; | |
4833 | } | |
4834 | ||
4835 | ||
4836 | /* Decrease the reference counter and maybe free the group */ | |
4837 | static void wpa_group_put(struct wpa_authenticator *wpa_auth, | |
4838 | struct wpa_group *group) | |
4839 | { | |
4840 | /* Skip the special first group */ | |
4841 | if (wpa_auth->group == group) | |
4842 | return; | |
4843 | ||
4844 | group->references--; | |
4845 | if (group->references) | |
4846 | return; | |
4847 | wpa_group_free(wpa_auth, group); | |
4848 | } | |
4849 | ||
4850 | ||
4851 | /* | |
4852 | * Add a group that has its references counter set to zero. Caller needs to | |
4853 | * call wpa_group_get() on the return value to mark the entry in use. | |
4854 | */ | |
6fc6879b JM |
4855 | static struct wpa_group * |
4856 | wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id) | |
4857 | { | |
4858 | struct wpa_group *group; | |
4859 | ||
9385f03f | 4860 | if (!wpa_auth || !wpa_auth->group) |
6fc6879b JM |
4861 | return NULL; |
4862 | ||
4863 | wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d", | |
4864 | vlan_id); | |
bdffdc5d | 4865 | group = wpa_group_init(wpa_auth, vlan_id, 0); |
9385f03f | 4866 | if (!group) |
6fc6879b JM |
4867 | return NULL; |
4868 | ||
4869 | group->next = wpa_auth->group->next; | |
4870 | wpa_auth->group->next = group; | |
4871 | ||
4872 | return group; | |
4873 | } | |
4874 | ||
4875 | ||
7cebc8e2 MB |
4876 | /* |
4877 | * Enforce that the group state machine for the VLAN is running, increase | |
4878 | * reference counter as interface is up. References might have been increased | |
4879 | * even if a negative value is returned. | |
4880 | * Returns: -1 on error (group missing, group already failed); otherwise, 0 | |
4881 | */ | |
4882 | int wpa_auth_ensure_group(struct wpa_authenticator *wpa_auth, int vlan_id) | |
4883 | { | |
4884 | struct wpa_group *group; | |
4885 | ||
9385f03f | 4886 | if (!wpa_auth) |
7cebc8e2 MB |
4887 | return 0; |
4888 | ||
4889 | group = wpa_auth->group; | |
4890 | while (group) { | |
4891 | if (group->vlan_id == vlan_id) | |
4892 | break; | |
4893 | group = group->next; | |
4894 | } | |
4895 | ||
9385f03f | 4896 | if (!group) { |
7cebc8e2 | 4897 | group = wpa_auth_add_group(wpa_auth, vlan_id); |
9385f03f | 4898 | if (!group) |
7cebc8e2 MB |
4899 | return -1; |
4900 | } | |
4901 | ||
4902 | wpa_printf(MSG_DEBUG, | |
4903 | "WPA: Ensure group state machine running for VLAN ID %d", | |
4904 | vlan_id); | |
4905 | ||
4906 | wpa_group_get(wpa_auth, group); | |
4907 | group->num_setup_iface++; | |
4908 | ||
4909 | if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) | |
4910 | return -1; | |
4911 | ||
4912 | return 0; | |
4913 | } | |
4914 | ||
4915 | ||
4916 | /* | |
4917 | * Decrease reference counter, expected to be zero afterwards. | |
4918 | * returns: -1 on error (group not found, group in fail state) | |
4919 | * -2 if wpa_group is still referenced | |
4920 | * 0 else | |
4921 | */ | |
4922 | int wpa_auth_release_group(struct wpa_authenticator *wpa_auth, int vlan_id) | |
4923 | { | |
4924 | struct wpa_group *group; | |
4925 | int ret = 0; | |
4926 | ||
9385f03f | 4927 | if (!wpa_auth) |
7cebc8e2 MB |
4928 | return 0; |
4929 | ||
4930 | group = wpa_auth->group; | |
4931 | while (group) { | |
4932 | if (group->vlan_id == vlan_id) | |
4933 | break; | |
4934 | group = group->next; | |
4935 | } | |
4936 | ||
9385f03f | 4937 | if (!group) |
7cebc8e2 MB |
4938 | return -1; |
4939 | ||
4940 | wpa_printf(MSG_DEBUG, | |
4941 | "WPA: Try stopping group state machine for VLAN ID %d", | |
4942 | vlan_id); | |
4943 | ||
4944 | if (group->num_setup_iface <= 0) { | |
4945 | wpa_printf(MSG_ERROR, | |
4946 | "WPA: wpa_auth_release_group called more often than wpa_auth_ensure_group for VLAN ID %d, skipping.", | |
4947 | vlan_id); | |
4948 | return -1; | |
4949 | } | |
4950 | group->num_setup_iface--; | |
4951 | ||
4952 | if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) | |
4953 | ret = -1; | |
4954 | ||
4955 | if (group->references > 1) { | |
4956 | wpa_printf(MSG_DEBUG, | |
4957 | "WPA: Cannot stop group state machine for VLAN ID %d as references are still hold", | |
4958 | vlan_id); | |
4959 | ret = -2; | |
4960 | } | |
4961 | ||
4962 | wpa_group_put(wpa_auth, group); | |
4963 | ||
4964 | return ret; | |
4965 | } | |
4966 | ||
4967 | ||
6fc6879b JM |
4968 | int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id) |
4969 | { | |
4970 | struct wpa_group *group; | |
4971 | ||
9385f03f | 4972 | if (!sm || !sm->wpa_auth) |
6fc6879b JM |
4973 | return 0; |
4974 | ||
4975 | group = sm->wpa_auth->group; | |
4976 | while (group) { | |
4977 | if (group->vlan_id == vlan_id) | |
4978 | break; | |
4979 | group = group->next; | |
4980 | } | |
4981 | ||
9385f03f | 4982 | if (!group) { |
6fc6879b | 4983 | group = wpa_auth_add_group(sm->wpa_auth, vlan_id); |
9385f03f | 4984 | if (!group) |
6fc6879b JM |
4985 | return -1; |
4986 | } | |
4987 | ||
4988 | if (sm->group == group) | |
4989 | return 0; | |
4990 | ||
7d7f7be2 JM |
4991 | if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) |
4992 | return -1; | |
4993 | ||
f83d3491 JM |
4994 | wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR |
4995 | " to use group state machine for VLAN ID %d", | |
4996 | MAC2STR(sm->addr), vlan_id); | |
6fc6879b | 4997 | |
a0ad9e8c MB |
4998 | wpa_group_get(sm->wpa_auth, group); |
4999 | wpa_group_put(sm->wpa_auth, sm->group); | |
6fc6879b | 5000 | sm->group = group; |
a0ad9e8c | 5001 | |
6fc6879b JM |
5002 | return 0; |
5003 | } | |
e4bf4db9 JM |
5004 | |
5005 | ||
5006 | void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth, | |
5007 | struct wpa_state_machine *sm, int ack) | |
5008 | { | |
9385f03f | 5009 | if (!wpa_auth || !sm) |
e4bf4db9 JM |
5010 | return; |
5011 | wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key TX status for STA " MACSTR | |
5012 | " ack=%d", MAC2STR(sm->addr), ack); | |
5013 | if (sm->pending_1_of_4_timeout && ack) { | |
5014 | /* | |
5015 | * Some deployed supplicant implementations update their SNonce | |
5016 | * for each EAPOL-Key 2/4 message even within the same 4-way | |
5017 | * handshake and then fail to use the first SNonce when | |
5018 | * deriving the PTK. This results in unsuccessful 4-way | |
5019 | * handshake whenever the relatively short initial timeout is | |
5020 | * reached and EAPOL-Key 1/4 is retransmitted. Try to work | |
5021 | * around this by increasing the timeout now that we know that | |
5022 | * the station has received the frame. | |
5023 | */ | |
5024 | int timeout_ms = eapol_key_timeout_subseq; | |
f83d3491 JM |
5025 | wpa_printf(MSG_DEBUG, |
5026 | "WPA: Increase initial EAPOL-Key 1/4 timeout by %u ms because of acknowledged frame", | |
e4bf4db9 JM |
5027 | timeout_ms); |
5028 | eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm); | |
5029 | eloop_register_timeout(timeout_ms / 1000, | |
5030 | (timeout_ms % 1000) * 1000, | |
5031 | wpa_send_eapol_timeout, wpa_auth, sm); | |
5032 | } | |
3d695328 JM |
5033 | |
5034 | #ifdef CONFIG_TESTING_OPTIONS | |
5035 | if (sm->eapol_status_cb) { | |
5036 | sm->eapol_status_cb(sm->eapol_status_cb_ctx1, | |
5037 | sm->eapol_status_cb_ctx2); | |
5038 | sm->eapol_status_cb = NULL; | |
5039 | } | |
5040 | #endif /* CONFIG_TESTING_OPTIONS */ | |
e4bf4db9 | 5041 | } |
c10347f2 JM |
5042 | |
5043 | ||
5044 | int wpa_auth_uses_sae(struct wpa_state_machine *sm) | |
5045 | { | |
9385f03f | 5046 | if (!sm) |
c10347f2 JM |
5047 | return 0; |
5048 | return wpa_key_mgmt_sae(sm->wpa_key_mgmt); | |
5049 | } | |
aa189ac9 JM |
5050 | |
5051 | ||
5052 | int wpa_auth_uses_ft_sae(struct wpa_state_machine *sm) | |
5053 | { | |
9385f03f | 5054 | if (!sm) |
aa189ac9 JM |
5055 | return 0; |
5056 | return sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_SAE; | |
5057 | } | |
25ef8529 JM |
5058 | |
5059 | ||
5060 | #ifdef CONFIG_P2P | |
5061 | int wpa_auth_get_ip_addr(struct wpa_state_machine *sm, u8 *addr) | |
5062 | { | |
9385f03f | 5063 | if (!sm || WPA_GET_BE32(sm->ip_addr) == 0) |
25ef8529 JM |
5064 | return -1; |
5065 | os_memcpy(addr, sm->ip_addr, 4); | |
5066 | return 0; | |
5067 | } | |
5068 | #endif /* CONFIG_P2P */ | |
cbc210de JM |
5069 | |
5070 | ||
5071 | int wpa_auth_radius_das_disconnect_pmksa(struct wpa_authenticator *wpa_auth, | |
5072 | struct radius_das_attrs *attr) | |
5073 | { | |
5074 | return pmksa_cache_auth_radius_das_disconnect(wpa_auth->pmksa, attr); | |
5075 | } | |
34782730 JM |
5076 | |
5077 | ||
5078 | void wpa_auth_reconfig_group_keys(struct wpa_authenticator *wpa_auth) | |
5079 | { | |
5080 | struct wpa_group *group; | |
5081 | ||
5082 | if (!wpa_auth) | |
5083 | return; | |
5084 | for (group = wpa_auth->group; group; group = group->next) | |
5085 | wpa_group_config_group_keys(wpa_auth, group); | |
5086 | } | |
7eace378 JM |
5087 | |
5088 | ||
5089 | #ifdef CONFIG_FILS | |
5090 | ||
5091 | struct wpa_auth_fils_iter_data { | |
5092 | struct wpa_authenticator *auth; | |
5093 | const u8 *cache_id; | |
5094 | struct rsn_pmksa_cache_entry *pmksa; | |
5095 | const u8 *spa; | |
5096 | const u8 *pmkid; | |
5097 | }; | |
5098 | ||
5099 | ||
5100 | static int wpa_auth_fils_iter(struct wpa_authenticator *a, void *ctx) | |
5101 | { | |
5102 | struct wpa_auth_fils_iter_data *data = ctx; | |
5103 | ||
4cc6574d | 5104 | if (a == data->auth || !a->conf.fils_cache_id_set || |
7eace378 JM |
5105 | os_memcmp(a->conf.fils_cache_id, data->cache_id, |
5106 | FILS_CACHE_ID_LEN) != 0) | |
5107 | return 0; | |
5108 | data->pmksa = pmksa_cache_auth_get(a->pmksa, data->spa, data->pmkid); | |
5109 | return data->pmksa != NULL; | |
5110 | } | |
5111 | ||
5112 | ||
5113 | struct rsn_pmksa_cache_entry * | |
5114 | wpa_auth_pmksa_get_fils_cache_id(struct wpa_authenticator *wpa_auth, | |
5115 | const u8 *sta_addr, const u8 *pmkid) | |
5116 | { | |
5117 | struct wpa_auth_fils_iter_data idata; | |
5118 | ||
5119 | if (!wpa_auth->conf.fils_cache_id_set) | |
5120 | return NULL; | |
5121 | idata.auth = wpa_auth; | |
5122 | idata.cache_id = wpa_auth->conf.fils_cache_id; | |
5123 | idata.pmksa = NULL; | |
5124 | idata.spa = sta_addr; | |
5125 | idata.pmkid = pmkid; | |
5126 | wpa_auth_for_each_auth(wpa_auth, wpa_auth_fils_iter, &idata); | |
5127 | return idata.pmksa; | |
5128 | } | |
5129 | ||
5db997e3 JM |
5130 | |
5131 | #ifdef CONFIG_IEEE80211R_AP | |
a7968ea5 JM |
5132 | int wpa_auth_write_fte(struct wpa_authenticator *wpa_auth, int use_sha384, |
5133 | u8 *buf, size_t len) | |
5db997e3 JM |
5134 | { |
5135 | struct wpa_auth_config *conf = &wpa_auth->conf; | |
5136 | ||
a7968ea5 | 5137 | return wpa_write_ftie(conf, use_sha384, conf->r0_key_holder, |
5db997e3 | 5138 | conf->r0_key_holder_len, |
51d1924b | 5139 | NULL, NULL, buf, len, NULL, 0, 0); |
5db997e3 JM |
5140 | } |
5141 | #endif /* CONFIG_IEEE80211R_AP */ | |
5142 | ||
8acbf85f JM |
5143 | |
5144 | void wpa_auth_get_fils_aead_params(struct wpa_state_machine *sm, | |
5145 | u8 *fils_anonce, u8 *fils_snonce, | |
5146 | u8 *fils_kek, size_t *fils_kek_len) | |
5147 | { | |
5148 | os_memcpy(fils_anonce, sm->ANonce, WPA_NONCE_LEN); | |
5149 | os_memcpy(fils_snonce, sm->SNonce, WPA_NONCE_LEN); | |
5150 | os_memcpy(fils_kek, sm->PTK.kek, WPA_KEK_MAX_LEN); | |
5151 | *fils_kek_len = sm->PTK.kek_len; | |
5152 | } | |
5153 | ||
a40bd06e JM |
5154 | |
5155 | void wpa_auth_add_fils_pmk_pmkid(struct wpa_state_machine *sm, const u8 *pmk, | |
5156 | size_t pmk_len, const u8 *pmkid) | |
5157 | { | |
5158 | os_memcpy(sm->PMK, pmk, pmk_len); | |
5159 | sm->pmk_len = pmk_len; | |
5160 | os_memcpy(sm->pmkid, pmkid, PMKID_LEN); | |
5161 | sm->pmkid_set = 1; | |
5162 | } | |
5163 | ||
7eace378 | 5164 | #endif /* CONFIG_FILS */ |
6bc2f00f JM |
5165 | |
5166 | ||
36536639 JM |
5167 | void wpa_auth_set_auth_alg(struct wpa_state_machine *sm, u16 auth_alg) |
5168 | { | |
5169 | if (sm) | |
5170 | sm->auth_alg = auth_alg; | |
5171 | } | |
5172 | ||
5173 | ||
10ec6a5f JM |
5174 | #ifdef CONFIG_DPP2 |
5175 | void wpa_auth_set_dpp_z(struct wpa_state_machine *sm, const struct wpabuf *z) | |
5176 | { | |
5177 | if (sm) { | |
5178 | wpabuf_clear_free(sm->dpp_z); | |
5179 | sm->dpp_z = z ? wpabuf_dup(z) : NULL; | |
5180 | } | |
5181 | } | |
5182 | #endif /* CONFIG_DPP2 */ | |
5183 | ||
5184 | ||
82424732 | 5185 | #ifdef CONFIG_TESTING_OPTIONS |
d8afdb21 | 5186 | |
3d695328 JM |
5187 | int wpa_auth_resend_m1(struct wpa_state_machine *sm, int change_anonce, |
5188 | void (*cb)(void *ctx1, void *ctx2), | |
5189 | void *ctx1, void *ctx2) | |
d8afdb21 JM |
5190 | { |
5191 | const u8 *anonce = sm->ANonce; | |
5192 | u8 anonce_buf[WPA_NONCE_LEN]; | |
5193 | ||
5194 | if (change_anonce) { | |
5195 | if (random_get_bytes(anonce_buf, WPA_NONCE_LEN)) | |
5196 | return -1; | |
5197 | anonce = anonce_buf; | |
5198 | } | |
5199 | ||
5200 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
5201 | "sending 1/4 msg of 4-Way Handshake (TESTING)"); | |
5202 | wpa_send_eapol(sm->wpa_auth, sm, | |
5203 | WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL, | |
5204 | anonce, NULL, 0, 0, 0); | |
5205 | return 0; | |
5206 | } | |
5207 | ||
5208 | ||
3d695328 JM |
5209 | int wpa_auth_resend_m3(struct wpa_state_machine *sm, |
5210 | void (*cb)(void *ctx1, void *ctx2), | |
5211 | void *ctx1, void *ctx2) | |
d8afdb21 | 5212 | { |
0c3bc1be | 5213 | u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos; |
0c3bc1be | 5214 | u8 *opos; |
d8afdb21 JM |
5215 | size_t gtk_len, kde_len; |
5216 | struct wpa_group *gsm = sm->group; | |
5217 | u8 *wpa_ie; | |
7a4b01c8 | 5218 | int wpa_ie_len, secure, gtkidx, encr = 0; |
862aac1f | 5219 | u8 hdr[2]; |
d8afdb21 JM |
5220 | |
5221 | /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE], | |
16889aff | 5222 | GTK[GN], IGTK, [BIGTK], [FTIE], [TIE * 2]) |
d8afdb21 JM |
5223 | */ |
5224 | ||
5225 | /* Use 0 RSC */ | |
5226 | os_memset(rsc, 0, WPA_KEY_RSC_LEN); | |
5227 | /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */ | |
5228 | wpa_ie = sm->wpa_auth->wpa_ie; | |
5229 | wpa_ie_len = sm->wpa_auth->wpa_ie_len; | |
5230 | if (sm->wpa == WPA_VERSION_WPA && | |
5231 | (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) && | |
5232 | wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) { | |
5233 | /* WPA-only STA, remove RSN IE and possible MDIE */ | |
5234 | wpa_ie = wpa_ie + wpa_ie[1] + 2; | |
5235 | if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN) | |
5236 | wpa_ie = wpa_ie + wpa_ie[1] + 2; | |
5237 | wpa_ie_len = wpa_ie[1] + 2; | |
5238 | } | |
5239 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
5240 | "sending 3/4 msg of 4-Way Handshake (TESTING)"); | |
5241 | if (sm->wpa == WPA_VERSION_WPA2) { | |
5242 | /* WPA2 send GTK in the 4-way handshake */ | |
5243 | secure = 1; | |
5244 | gtk = gsm->GTK[gsm->GN - 1]; | |
5245 | gtk_len = gsm->GTK_len; | |
7a4b01c8 | 5246 | gtkidx = gsm->GN; |
d8afdb21 JM |
5247 | _rsc = rsc; |
5248 | encr = 1; | |
5249 | } else { | |
5250 | /* WPA does not include GTK in msg 3/4 */ | |
5251 | secure = 0; | |
5252 | gtk = NULL; | |
5253 | gtk_len = 0; | |
d8afdb21 JM |
5254 | _rsc = NULL; |
5255 | if (sm->rx_eapol_key_secure) { | |
5256 | /* | |
5257 | * It looks like Windows 7 supplicant tries to use | |
5258 | * Secure bit in msg 2/4 after having reported Michael | |
5259 | * MIC failure and it then rejects the 4-way handshake | |
5260 | * if msg 3/4 does not set Secure bit. Work around this | |
5261 | * by setting the Secure bit here even in the case of | |
5262 | * WPA if the supplicant used it first. | |
5263 | */ | |
5264 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
f83d3491 | 5265 | "STA used Secure bit in WPA msg 2/4 - set Secure for 3/4 as workaround"); |
d8afdb21 JM |
5266 | secure = 1; |
5267 | } | |
5268 | } | |
5269 | ||
17c2559c | 5270 | kde_len = wpa_ie_len + ieee80211w_kde_len(sm) + ocv_oci_len(sm); |
862aac1f AW |
5271 | |
5272 | if (sm->use_ext_key_id) | |
5273 | kde_len += 2 + RSN_SELECTOR_LEN + 2; | |
5274 | ||
d8afdb21 JM |
5275 | if (gtk) |
5276 | kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len; | |
5277 | #ifdef CONFIG_IEEE80211R_AP | |
5278 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { | |
5279 | kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */ | |
5280 | kde_len += 300; /* FTIE + 2 * TIE */ | |
5281 | } | |
5282 | #endif /* CONFIG_IEEE80211R_AP */ | |
5283 | kde = os_malloc(kde_len); | |
9385f03f | 5284 | if (!kde) |
d8afdb21 JM |
5285 | return -1; |
5286 | ||
5287 | pos = kde; | |
5288 | os_memcpy(pos, wpa_ie, wpa_ie_len); | |
5289 | pos += wpa_ie_len; | |
5290 | #ifdef CONFIG_IEEE80211R_AP | |
5291 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { | |
5292 | int res; | |
5293 | size_t elen; | |
5294 | ||
5295 | elen = pos - kde; | |
5296 | res = wpa_insert_pmkid(kde, &elen, sm->pmk_r1_name); | |
5297 | if (res < 0) { | |
f83d3491 JM |
5298 | wpa_printf(MSG_ERROR, |
5299 | "FT: Failed to insert PMKR1Name into RSN IE in EAPOL-Key data"); | |
d8afdb21 JM |
5300 | os_free(kde); |
5301 | return -1; | |
5302 | } | |
5303 | pos -= wpa_ie_len; | |
5304 | pos += elen; | |
5305 | } | |
5306 | #endif /* CONFIG_IEEE80211R_AP */ | |
862aac1f AW |
5307 | hdr[1] = 0; |
5308 | ||
5309 | if (sm->use_ext_key_id) { | |
5310 | hdr[0] = sm->keyidx_active & 0x01; | |
5311 | pos = wpa_add_kde(pos, RSN_KEY_DATA_KEYID, hdr, 2, NULL, 0); | |
5312 | } | |
5313 | ||
d8afdb21 | 5314 | if (gtk) { |
7a4b01c8 | 5315 | hdr[0] = gtkidx & 0x03; |
d8afdb21 JM |
5316 | pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2, |
5317 | gtk, gtk_len); | |
5318 | } | |
5319 | opos = pos; | |
5320 | pos = ieee80211w_kde_add(sm, pos); | |
9f917339 MV |
5321 | if (pos - opos >= 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN) { |
5322 | /* skip KDE header and keyid */ | |
5323 | opos += 2 + RSN_SELECTOR_LEN + 2; | |
d8afdb21 JM |
5324 | os_memset(opos, 0, 6); /* clear PN */ |
5325 | } | |
17c2559c MV |
5326 | if (ocv_oci_add(sm, &pos) < 0) { |
5327 | os_free(kde); | |
5328 | return -1; | |
5329 | } | |
d8afdb21 JM |
5330 | |
5331 | #ifdef CONFIG_IEEE80211R_AP | |
5332 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { | |
5333 | int res; | |
5334 | struct wpa_auth_config *conf; | |
5335 | ||
5336 | conf = &sm->wpa_auth->conf; | |
5337 | if (sm->assoc_resp_ftie && | |
5338 | kde + kde_len - pos >= 2 + sm->assoc_resp_ftie[1]) { | |
5339 | os_memcpy(pos, sm->assoc_resp_ftie, | |
5340 | 2 + sm->assoc_resp_ftie[1]); | |
5341 | res = 2 + sm->assoc_resp_ftie[1]; | |
5342 | } else { | |
a7968ea5 JM |
5343 | int use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt); |
5344 | ||
5345 | res = wpa_write_ftie(conf, use_sha384, | |
5346 | conf->r0_key_holder, | |
d8afdb21 JM |
5347 | conf->r0_key_holder_len, |
5348 | NULL, NULL, pos, | |
5349 | kde + kde_len - pos, | |
51d1924b | 5350 | NULL, 0, 0); |
d8afdb21 JM |
5351 | } |
5352 | if (res < 0) { | |
f83d3491 JM |
5353 | wpa_printf(MSG_ERROR, |
5354 | "FT: Failed to insert FTIE into EAPOL-Key Key Data"); | |
d8afdb21 JM |
5355 | os_free(kde); |
5356 | return -1; | |
5357 | } | |
5358 | pos += res; | |
5359 | ||
5360 | /* TIE[ReassociationDeadline] (TU) */ | |
5361 | *pos++ = WLAN_EID_TIMEOUT_INTERVAL; | |
5362 | *pos++ = 5; | |
5363 | *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE; | |
5364 | WPA_PUT_LE32(pos, conf->reassociation_deadline); | |
5365 | pos += 4; | |
5366 | ||
5367 | /* TIE[KeyLifetime] (seconds) */ | |
5368 | *pos++ = WLAN_EID_TIMEOUT_INTERVAL; | |
5369 | *pos++ = 5; | |
5370 | *pos++ = WLAN_TIMEOUT_KEY_LIFETIME; | |
83fe4bd3 | 5371 | WPA_PUT_LE32(pos, conf->r0_key_lifetime); |
d8afdb21 JM |
5372 | pos += 4; |
5373 | } | |
5374 | #endif /* CONFIG_IEEE80211R_AP */ | |
5375 | ||
5376 | wpa_send_eapol(sm->wpa_auth, sm, | |
5377 | (secure ? WPA_KEY_INFO_SECURE : 0) | | |
5378 | (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ? | |
5379 | WPA_KEY_INFO_MIC : 0) | | |
5380 | WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL | | |
5381 | WPA_KEY_INFO_KEY_TYPE, | |
7a4b01c8 | 5382 | _rsc, sm->ANonce, kde, pos - kde, 0, encr); |
d8afdb21 JM |
5383 | os_free(kde); |
5384 | return 0; | |
5385 | } | |
5386 | ||
5387 | ||
3d695328 JM |
5388 | int wpa_auth_resend_group_m1(struct wpa_state_machine *sm, |
5389 | void (*cb)(void *ctx1, void *ctx2), | |
5390 | void *ctx1, void *ctx2) | |
6bc2f00f JM |
5391 | { |
5392 | u8 rsc[WPA_KEY_RSC_LEN]; | |
5393 | struct wpa_group *gsm = sm->group; | |
5394 | const u8 *kde; | |
0c3bc1be | 5395 | u8 *kde_buf = NULL, *pos, hdr[2]; |
0c3bc1be | 5396 | u8 *opos; |
6bc2f00f JM |
5397 | size_t kde_len; |
5398 | u8 *gtk; | |
5399 | ||
5400 | /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */ | |
5401 | os_memset(rsc, 0, WPA_KEY_RSC_LEN); | |
5402 | /* Use 0 RSC */ | |
5403 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
5404 | "sending 1/2 msg of Group Key Handshake (TESTING)"); | |
5405 | ||
5406 | gtk = gsm->GTK[gsm->GN - 1]; | |
5407 | if (sm->wpa == WPA_VERSION_WPA2) { | |
5408 | kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len + | |
17c2559c | 5409 | ieee80211w_kde_len(sm) + ocv_oci_len(sm); |
6bc2f00f | 5410 | kde_buf = os_malloc(kde_len); |
9385f03f | 5411 | if (!kde_buf) |
6bc2f00f JM |
5412 | return -1; |
5413 | ||
5414 | kde = pos = kde_buf; | |
5415 | hdr[0] = gsm->GN & 0x03; | |
5416 | hdr[1] = 0; | |
5417 | pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2, | |
5418 | gtk, gsm->GTK_len); | |
5419 | opos = pos; | |
5420 | pos = ieee80211w_kde_add(sm, pos); | |
9f917339 MV |
5421 | if (pos - opos >= |
5422 | 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN) { | |
5423 | /* skip KDE header and keyid */ | |
5424 | opos += 2 + RSN_SELECTOR_LEN + 2; | |
6bc2f00f JM |
5425 | os_memset(opos, 0, 6); /* clear PN */ |
5426 | } | |
17c2559c MV |
5427 | if (ocv_oci_add(sm, &pos) < 0) { |
5428 | os_free(kde_buf); | |
5429 | return -1; | |
5430 | } | |
6bc2f00f JM |
5431 | kde_len = pos - kde; |
5432 | } else { | |
5433 | kde = gtk; | |
5434 | kde_len = gsm->GTK_len; | |
5435 | } | |
5436 | ||
3d695328 JM |
5437 | sm->eapol_status_cb = cb; |
5438 | sm->eapol_status_cb_ctx1 = ctx1; | |
5439 | sm->eapol_status_cb_ctx2 = ctx2; | |
5440 | ||
6bc2f00f JM |
5441 | wpa_send_eapol(sm->wpa_auth, sm, |
5442 | WPA_KEY_INFO_SECURE | | |
5443 | (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ? | |
5444 | WPA_KEY_INFO_MIC : 0) | | |
5445 | WPA_KEY_INFO_ACK | | |
5446 | (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0), | |
5447 | rsc, NULL, kde, kde_len, gsm->GN, 1); | |
5448 | ||
5449 | os_free(kde_buf); | |
5450 | return 0; | |
5451 | } | |
d8afdb21 | 5452 | |
92662fb2 JB |
5453 | |
5454 | int wpa_auth_rekey_gtk(struct wpa_authenticator *wpa_auth) | |
5455 | { | |
5456 | if (!wpa_auth) | |
5457 | return -1; | |
5458 | eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL); | |
5459 | return eloop_register_timeout(0, 0, wpa_rekey_gtk, wpa_auth, NULL); | |
5460 | } | |
5461 | ||
6bc2f00f | 5462 | #endif /* CONFIG_TESTING_OPTIONS */ |