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Commit | Line | Data |
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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 | { | |
cef8fac0 | 109 | if (wpa_auth->cb->get_eapol == NULL) |
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 | { |
cef8fac0 | 121 | if (wpa_auth->cb->get_psk == NULL) |
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 | { | |
cef8fac0 | 131 | if (wpa_auth->cb->get_msk == NULL) |
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 | { |
cef8fac0 | 143 | if (wpa_auth->cb->set_key == NULL) |
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 | ||
cef8fac0 | 155 | if (wpa_auth->cb->get_seqnum == NULL) |
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 | { | |
cef8fac0 | 187 | if (wpa_auth->cb->send_eapol == NULL) |
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 | { | |
cef8fac0 | 198 | if (wpa_auth->cb->start_ampe == NULL) |
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 | { | |
cef8fac0 | 209 | if (wpa_auth->cb->for_each_sta == NULL) |
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 | { | |
cef8fac0 | 219 | if (wpa_auth->cb->for_each_auth == NULL) |
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 | { | |
cef8fac0 | 228 | if (wpa_auth->cb->logger == NULL) |
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 | ||
cef8fac0 | 241 | if (wpa_auth->cb->logger == NULL) |
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 | { |
cef8fac0 | 262 | if (wpa_auth->cb->disconnect == NULL) |
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)) { |
6fc6879b JM |
295 | wpa_printf(MSG_ERROR, "Failed to get random data for WPA " |
296 | "initialization."); | |
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)); | |
420 | if (group == NULL) | |
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 JM |
427 | if (random_pool_ready() != 1) { |
428 | wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool " | |
429 | "for secure operations - update keys later when " | |
430 | "the first station connects"); | |
431 | } | |
432 | ||
1bdb7ab3 JM |
433 | /* |
434 | * Set initial GMK/Counter value here. The actual values that will be | |
435 | * used in negotiations will be set once the first station tries to | |
436 | * connect. This allows more time for collecting additional randomness | |
437 | * on embedded devices. | |
6fc6879b | 438 | */ |
1bdb7ab3 | 439 | if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0) { |
6fc6879b JM |
440 | wpa_printf(MSG_ERROR, "Failed to get random data for WPA " |
441 | "initialization."); | |
442 | os_free(group); | |
443 | return NULL; | |
444 | } | |
6fc6879b JM |
445 | |
446 | group->GInit = TRUE; | |
bdffdc5d JM |
447 | if (delay_init) { |
448 | wpa_printf(MSG_DEBUG, "WPA: Delay group state machine start " | |
449 | "until Beacon frames have been configured"); | |
450 | /* Initialization is completed in wpa_init_keys(). */ | |
451 | } else { | |
452 | wpa_group_sm_step(wpa_auth, group); | |
453 | group->GInit = FALSE; | |
454 | wpa_group_sm_step(wpa_auth, group); | |
455 | } | |
6fc6879b JM |
456 | |
457 | return group; | |
458 | } | |
459 | ||
460 | ||
461 | /** | |
462 | * wpa_init - Initialize WPA authenticator | |
463 | * @addr: Authenticator address | |
464 | * @conf: Configuration for WPA authenticator | |
a17df5fb | 465 | * @cb: Callback functions for WPA authenticator |
6fc6879b JM |
466 | * Returns: Pointer to WPA authenticator data or %NULL on failure |
467 | */ | |
468 | struct wpa_authenticator * wpa_init(const u8 *addr, | |
469 | struct wpa_auth_config *conf, | |
cef8fac0 JB |
470 | const struct wpa_auth_callbacks *cb, |
471 | void *cb_ctx) | |
6fc6879b JM |
472 | { |
473 | struct wpa_authenticator *wpa_auth; | |
474 | ||
475 | wpa_auth = os_zalloc(sizeof(struct wpa_authenticator)); | |
476 | if (wpa_auth == NULL) | |
477 | return NULL; | |
478 | os_memcpy(wpa_auth->addr, addr, ETH_ALEN); | |
479 | os_memcpy(&wpa_auth->conf, conf, sizeof(*conf)); | |
cef8fac0 JB |
480 | wpa_auth->cb = cb; |
481 | wpa_auth->cb_ctx = cb_ctx; | |
6fc6879b JM |
482 | |
483 | if (wpa_auth_gen_wpa_ie(wpa_auth)) { | |
484 | wpa_printf(MSG_ERROR, "Could not generate WPA IE."); | |
485 | os_free(wpa_auth); | |
486 | return NULL; | |
487 | } | |
488 | ||
bdffdc5d | 489 | wpa_auth->group = wpa_group_init(wpa_auth, 0, 1); |
6fc6879b JM |
490 | if (wpa_auth->group == NULL) { |
491 | os_free(wpa_auth->wpa_ie); | |
492 | os_free(wpa_auth); | |
493 | return NULL; | |
494 | } | |
495 | ||
4bb081f1 JM |
496 | wpa_auth->pmksa = pmksa_cache_auth_init(wpa_auth_pmksa_free_cb, |
497 | wpa_auth); | |
6fc6879b JM |
498 | if (wpa_auth->pmksa == NULL) { |
499 | wpa_printf(MSG_ERROR, "PMKSA cache initialization failed."); | |
27d9701d | 500 | os_free(wpa_auth->group); |
6fc6879b JM |
501 | os_free(wpa_auth->wpa_ie); |
502 | os_free(wpa_auth); | |
503 | return NULL; | |
504 | } | |
505 | ||
4ec1fd8e | 506 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b JM |
507 | wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init(); |
508 | if (wpa_auth->ft_pmk_cache == NULL) { | |
509 | wpa_printf(MSG_ERROR, "FT PMK cache initialization failed."); | |
27d9701d | 510 | os_free(wpa_auth->group); |
6fc6879b | 511 | os_free(wpa_auth->wpa_ie); |
4bb081f1 | 512 | pmksa_cache_auth_deinit(wpa_auth->pmksa); |
6fc6879b JM |
513 | os_free(wpa_auth); |
514 | return NULL; | |
515 | } | |
4ec1fd8e | 516 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b JM |
517 | |
518 | if (wpa_auth->conf.wpa_gmk_rekey) { | |
519 | eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0, | |
520 | wpa_rekey_gmk, wpa_auth, NULL); | |
521 | } | |
522 | ||
523 | if (wpa_auth->conf.wpa_group_rekey) { | |
524 | eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0, | |
525 | wpa_rekey_gtk, wpa_auth, NULL); | |
526 | } | |
527 | ||
25ef8529 JM |
528 | #ifdef CONFIG_P2P |
529 | if (WPA_GET_BE32(conf->ip_addr_start)) { | |
530 | int count = WPA_GET_BE32(conf->ip_addr_end) - | |
531 | WPA_GET_BE32(conf->ip_addr_start) + 1; | |
532 | if (count > 1000) | |
533 | count = 1000; | |
534 | if (count > 0) | |
535 | wpa_auth->ip_pool = bitfield_alloc(count); | |
536 | } | |
537 | #endif /* CONFIG_P2P */ | |
538 | ||
6fc6879b JM |
539 | return wpa_auth; |
540 | } | |
541 | ||
542 | ||
bdffdc5d JM |
543 | int wpa_init_keys(struct wpa_authenticator *wpa_auth) |
544 | { | |
545 | struct wpa_group *group = wpa_auth->group; | |
546 | ||
547 | wpa_printf(MSG_DEBUG, "WPA: Start group state machine to set initial " | |
548 | "keys"); | |
549 | wpa_group_sm_step(wpa_auth, group); | |
550 | group->GInit = FALSE; | |
551 | wpa_group_sm_step(wpa_auth, group); | |
7d7f7be2 JM |
552 | if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) |
553 | return -1; | |
bdffdc5d JM |
554 | return 0; |
555 | } | |
556 | ||
557 | ||
6fc6879b JM |
558 | /** |
559 | * wpa_deinit - Deinitialize WPA authenticator | |
560 | * @wpa_auth: Pointer to WPA authenticator data from wpa_init() | |
561 | */ | |
562 | void wpa_deinit(struct wpa_authenticator *wpa_auth) | |
563 | { | |
564 | struct wpa_group *group, *prev; | |
565 | ||
566 | eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL); | |
567 | eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL); | |
568 | ||
4bb081f1 | 569 | pmksa_cache_auth_deinit(wpa_auth->pmksa); |
6fc6879b | 570 | |
4ec1fd8e | 571 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b JM |
572 | wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache); |
573 | wpa_auth->ft_pmk_cache = NULL; | |
eefe8630 | 574 | wpa_ft_deinit(wpa_auth); |
4ec1fd8e | 575 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b | 576 | |
25ef8529 JM |
577 | #ifdef CONFIG_P2P |
578 | bitfield_free(wpa_auth->ip_pool); | |
579 | #endif /* CONFIG_P2P */ | |
580 | ||
581 | ||
6fc6879b JM |
582 | os_free(wpa_auth->wpa_ie); |
583 | ||
584 | group = wpa_auth->group; | |
585 | while (group) { | |
586 | prev = group; | |
587 | group = group->next; | |
588 | os_free(prev); | |
589 | } | |
590 | ||
591 | os_free(wpa_auth); | |
592 | } | |
593 | ||
594 | ||
595 | /** | |
596 | * wpa_reconfig - Update WPA authenticator configuration | |
597 | * @wpa_auth: Pointer to WPA authenticator data from wpa_init() | |
598 | * @conf: Configuration for WPA authenticator | |
599 | */ | |
600 | int wpa_reconfig(struct wpa_authenticator *wpa_auth, | |
601 | struct wpa_auth_config *conf) | |
602 | { | |
e6965d4e | 603 | struct wpa_group *group; |
6fc6879b JM |
604 | if (wpa_auth == NULL) |
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 JM |
637 | sm = os_zalloc(sizeof(struct wpa_state_machine)); |
638 | if (sm == NULL) | |
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 JM |
654 | { |
655 | if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL) | |
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, | |
661 | "FT authentication already completed - do not " | |
662 | "start 4-way handshake"); | |
3d4d2348 JM |
663 | /* Go to PTKINITDONE state to allow GTK rekeying */ |
664 | sm->wpa_ptk_state = WPA_PTK_PTKINITDONE; | |
3bbc4705 | 665 | sm->Pair = TRUE; |
6f9b5d16 | 666 | return 0; |
6fc6879b | 667 | } |
4ec1fd8e | 668 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b | 669 | |
07e0117d JM |
670 | #ifdef CONFIG_FILS |
671 | if (sm->fils_completed) { | |
672 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
673 | "FILS authentication already completed - do not start 4-way handshake"); | |
674 | /* Go to PTKINITDONE state to allow GTK rekeying */ | |
675 | sm->wpa_ptk_state = WPA_PTK_PTKINITDONE; | |
3bbc4705 | 676 | sm->Pair = TRUE; |
07e0117d JM |
677 | return 0; |
678 | } | |
679 | #endif /* CONFIG_FILS */ | |
680 | ||
6fc6879b | 681 | if (sm->started) { |
22a299ee | 682 | os_memset(&sm->key_replay, 0, sizeof(sm->key_replay)); |
6fc6879b | 683 | sm->ReAuthenticationRequest = TRUE; |
6f9b5d16 | 684 | return wpa_sm_step(sm); |
6fc6879b JM |
685 | } |
686 | ||
687 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
688 | "start authentication"); | |
689 | sm->started = 1; | |
690 | ||
691 | sm->Init = TRUE; | |
e4a6ea1d | 692 | if (wpa_sm_step(sm) == 1) |
6f9b5d16 | 693 | return 1; /* should not really happen */ |
6fc6879b JM |
694 | sm->Init = FALSE; |
695 | sm->AuthenticationRequest = TRUE; | |
6f9b5d16 | 696 | return wpa_sm_step(sm); |
6fc6879b JM |
697 | } |
698 | ||
699 | ||
a8d05fca JM |
700 | void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm) |
701 | { | |
702 | /* WPA/RSN was not used - clear WPA state. This is needed if the STA | |
703 | * reassociates back to the same AP while the previous entry for the | |
704 | * STA has not yet been removed. */ | |
705 | if (sm == NULL) | |
706 | return; | |
707 | ||
708 | sm->wpa_key_mgmt = 0; | |
709 | } | |
710 | ||
711 | ||
6fc6879b JM |
712 | static void wpa_free_sta_sm(struct wpa_state_machine *sm) |
713 | { | |
25ef8529 JM |
714 | #ifdef CONFIG_P2P |
715 | if (WPA_GET_BE32(sm->ip_addr)) { | |
716 | u32 start; | |
717 | wpa_printf(MSG_DEBUG, "P2P: Free assigned IP " | |
718 | "address %u.%u.%u.%u from " MACSTR, | |
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 | { | |
748 | if (sm == NULL) | |
749 | return; | |
750 | ||
751 | if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) { | |
752 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
753 | "strict rekeying - force GTK rekey since STA " | |
754 | "is leaving"); | |
3f5a1860 JB |
755 | if (eloop_deplete_timeout(0, 500000, wpa_rekey_gtk, |
756 | sm->wpa_auth, NULL) == -1) | |
757 | eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth, | |
758 | NULL); | |
6fc6879b JM |
759 | } |
760 | ||
761 | eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm); | |
e4bf4db9 | 762 | sm->pending_1_of_4_timeout = 0; |
6fc6879b | 763 | eloop_cancel_timeout(wpa_sm_call_step, sm, NULL); |
581a8cde | 764 | eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm); |
3a46cf93 MB |
765 | #ifdef CONFIG_IEEE80211R_AP |
766 | wpa_ft_sta_deinit(sm); | |
767 | #endif /* CONFIG_IEEE80211R_AP */ | |
6fc6879b JM |
768 | if (sm->in_step_loop) { |
769 | /* Must not free state machine while wpa_sm_step() is running. | |
770 | * Freeing will be completed in the end of wpa_sm_step(). */ | |
771 | wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state " | |
772 | "machine deinit for " MACSTR, MAC2STR(sm->addr)); | |
773 | sm->pending_deinit = 1; | |
774 | } else | |
775 | wpa_free_sta_sm(sm); | |
776 | } | |
777 | ||
778 | ||
779 | static void wpa_request_new_ptk(struct wpa_state_machine *sm) | |
780 | { | |
781 | if (sm == NULL) | |
782 | return; | |
783 | ||
1a7963e3 AW |
784 | if (sm->wpa_auth->conf.wpa_deny_ptk0_rekey) { |
785 | wpa_printf(MSG_INFO, | |
786 | "WPA: PTK0 rekey not allowed, disconnect " MACSTR, | |
787 | MAC2STR(sm->addr)); | |
788 | sm->Disconnect = TRUE; | |
789 | /* Try to encourage the STA to reconnect */ | |
790 | sm->disconnect_reason = | |
791 | WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA; | |
792 | } else { | |
793 | sm->PTKRequest = TRUE; | |
794 | sm->PTK_valid = 0; | |
795 | } | |
6fc6879b JM |
796 | } |
797 | ||
798 | ||
68921e24 | 799 | static int wpa_replay_counter_valid(struct wpa_key_replay_counter *ctr, |
22a299ee JM |
800 | const u8 *replay_counter) |
801 | { | |
802 | int i; | |
803 | for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) { | |
68921e24 | 804 | if (!ctr[i].valid) |
22a299ee | 805 | break; |
68921e24 | 806 | if (os_memcmp(replay_counter, ctr[i].counter, |
22a299ee JM |
807 | WPA_REPLAY_COUNTER_LEN) == 0) |
808 | return 1; | |
809 | } | |
810 | return 0; | |
811 | } | |
812 | ||
813 | ||
68921e24 JM |
814 | static void wpa_replay_counter_mark_invalid(struct wpa_key_replay_counter *ctr, |
815 | const u8 *replay_counter) | |
816 | { | |
817 | int i; | |
818 | for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) { | |
819 | if (ctr[i].valid && | |
820 | (replay_counter == NULL || | |
821 | os_memcmp(replay_counter, ctr[i].counter, | |
822 | WPA_REPLAY_COUNTER_LEN) == 0)) | |
823 | ctr[i].valid = FALSE; | |
824 | } | |
825 | } | |
826 | ||
827 | ||
4ec1fd8e | 828 | #ifdef CONFIG_IEEE80211R_AP |
0f857f43 JM |
829 | static int ft_check_msg_2_of_4(struct wpa_authenticator *wpa_auth, |
830 | struct wpa_state_machine *sm, | |
831 | struct wpa_eapol_ie_parse *kde) | |
832 | { | |
833 | struct wpa_ie_data ie; | |
834 | struct rsn_mdie *mdie; | |
835 | ||
836 | if (wpa_parse_wpa_ie_rsn(kde->rsn_ie, kde->rsn_ie_len, &ie) < 0 || | |
837 | ie.num_pmkid != 1 || ie.pmkid == NULL) { | |
838 | wpa_printf(MSG_DEBUG, "FT: No PMKR1Name in " | |
839 | "FT 4-way handshake message 2/4"); | |
840 | return -1; | |
841 | } | |
842 | ||
843 | os_memcpy(sm->sup_pmk_r1_name, ie.pmkid, PMKID_LEN); | |
844 | wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Supplicant", | |
845 | sm->sup_pmk_r1_name, PMKID_LEN); | |
846 | ||
847 | if (!kde->mdie || !kde->ftie) { | |
848 | wpa_printf(MSG_DEBUG, "FT: No %s in FT 4-way handshake " | |
849 | "message 2/4", kde->mdie ? "FTIE" : "MDIE"); | |
850 | return -1; | |
851 | } | |
852 | ||
853 | mdie = (struct rsn_mdie *) (kde->mdie + 2); | |
854 | if (kde->mdie[1] < sizeof(struct rsn_mdie) || | |
855 | os_memcmp(wpa_auth->conf.mobility_domain, mdie->mobility_domain, | |
856 | MOBILITY_DOMAIN_ID_LEN) != 0) { | |
857 | wpa_printf(MSG_DEBUG, "FT: MDIE mismatch"); | |
858 | return -1; | |
859 | } | |
860 | ||
861 | if (sm->assoc_resp_ftie && | |
862 | (kde->ftie[1] != sm->assoc_resp_ftie[1] || | |
863 | os_memcmp(kde->ftie, sm->assoc_resp_ftie, | |
864 | 2 + sm->assoc_resp_ftie[1]) != 0)) { | |
865 | wpa_printf(MSG_DEBUG, "FT: FTIE mismatch"); | |
866 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 2/4", | |
867 | kde->ftie, kde->ftie_len); | |
868 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)AssocResp", | |
869 | sm->assoc_resp_ftie, 2 + sm->assoc_resp_ftie[1]); | |
870 | return -1; | |
871 | } | |
872 | ||
873 | return 0; | |
874 | } | |
4ec1fd8e | 875 | #endif /* CONFIG_IEEE80211R_AP */ |
0f857f43 JM |
876 | |
877 | ||
c772d054 JM |
878 | static int wpa_receive_error_report(struct wpa_authenticator *wpa_auth, |
879 | struct wpa_state_machine *sm, int group) | |
ec027805 JM |
880 | { |
881 | /* Supplicant reported a Michael MIC error */ | |
882 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
883 | "received EAPOL-Key Error Request " | |
884 | "(STA detected Michael MIC failure (group=%d))", | |
885 | group); | |
fbc72d32 JM |
886 | |
887 | if (group && wpa_auth->conf.wpa_group != WPA_CIPHER_TKIP) { | |
888 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
889 | "ignore Michael MIC failure report since " | |
890 | "group cipher is not TKIP"); | |
891 | } else if (!group && sm->pairwise != WPA_CIPHER_TKIP) { | |
892 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
893 | "ignore Michael MIC failure report since " | |
894 | "pairwise cipher is not TKIP"); | |
895 | } else { | |
c772d054 JM |
896 | if (wpa_auth_mic_failure_report(wpa_auth, sm->addr) > 0) |
897 | return 1; /* STA entry was removed */ | |
fbc72d32 JM |
898 | sm->dot11RSNAStatsTKIPRemoteMICFailures++; |
899 | wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++; | |
900 | } | |
ec027805 JM |
901 | |
902 | /* | |
903 | * Error report is not a request for a new key handshake, but since | |
904 | * Authenticator may do it, let's change the keys now anyway. | |
905 | */ | |
906 | wpa_request_new_ptk(sm); | |
c772d054 | 907 | return 0; |
ec027805 JM |
908 | } |
909 | ||
910 | ||
f23c5b17 JM |
911 | static int wpa_try_alt_snonce(struct wpa_state_machine *sm, u8 *data, |
912 | size_t data_len) | |
913 | { | |
914 | struct wpa_ptk PTK; | |
915 | int ok = 0; | |
916 | const u8 *pmk = NULL; | |
7a12edd1 | 917 | size_t pmk_len; |
dbfa691d | 918 | int vlan_id = 0; |
f23c5b17 | 919 | |
b729fd8d | 920 | os_memset(&PTK, 0, sizeof(PTK)); |
f23c5b17 | 921 | for (;;) { |
e61fea6b JM |
922 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) && |
923 | !wpa_key_mgmt_sae(sm->wpa_key_mgmt)) { | |
f23c5b17 | 924 | pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, |
dbfa691d JM |
925 | sm->p2p_dev_addr, pmk, &pmk_len, |
926 | &vlan_id); | |
f23c5b17 JM |
927 | if (pmk == NULL) |
928 | break; | |
f9854c18 MK |
929 | #ifdef CONFIG_IEEE80211R_AP |
930 | if (wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt)) { | |
931 | os_memcpy(sm->xxkey, pmk, pmk_len); | |
932 | sm->xxkey_len = pmk_len; | |
933 | } | |
934 | #endif /* CONFIG_IEEE80211R_AP */ | |
207976f0 | 935 | } else { |
f23c5b17 | 936 | pmk = sm->PMK; |
207976f0 JM |
937 | pmk_len = sm->pmk_len; |
938 | } | |
f23c5b17 | 939 | |
65a44e84 JM |
940 | if (wpa_derive_ptk(sm, sm->alt_SNonce, pmk, pmk_len, &PTK, 0) < |
941 | 0) | |
364c064a | 942 | break; |
f23c5b17 | 943 | |
567da5bb JM |
944 | if (wpa_verify_key_mic(sm->wpa_key_mgmt, pmk_len, &PTK, |
945 | data, data_len) == 0) { | |
08dc8efd JM |
946 | if (sm->PMK != pmk) { |
947 | os_memcpy(sm->PMK, pmk, pmk_len); | |
948 | sm->pmk_len = pmk_len; | |
949 | } | |
f23c5b17 JM |
950 | ok = 1; |
951 | break; | |
952 | } | |
953 | ||
f5e0a332 JM |
954 | if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) || |
955 | wpa_key_mgmt_sae(sm->wpa_key_mgmt)) | |
f23c5b17 JM |
956 | break; |
957 | } | |
958 | ||
959 | if (!ok) { | |
960 | wpa_printf(MSG_DEBUG, | |
961 | "WPA: Earlier SNonce did not result in matching MIC"); | |
962 | return -1; | |
963 | } | |
964 | ||
965 | wpa_printf(MSG_DEBUG, | |
966 | "WPA: Earlier SNonce resulted in matching MIC"); | |
967 | sm->alt_snonce_valid = 0; | |
dbfa691d JM |
968 | |
969 | if (vlan_id && wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) && | |
970 | wpa_auth_update_vlan(sm->wpa_auth, sm->addr, vlan_id) < 0) | |
971 | return -1; | |
972 | ||
f23c5b17 JM |
973 | os_memcpy(sm->SNonce, sm->alt_SNonce, WPA_NONCE_LEN); |
974 | os_memcpy(&sm->PTK, &PTK, sizeof(PTK)); | |
31bc66e4 | 975 | forced_memzero(&PTK, sizeof(PTK)); |
f23c5b17 JM |
976 | sm->PTK_valid = TRUE; |
977 | ||
978 | return 0; | |
979 | } | |
980 | ||
981 | ||
6fc6879b JM |
982 | void wpa_receive(struct wpa_authenticator *wpa_auth, |
983 | struct wpa_state_machine *sm, | |
984 | u8 *data, size_t data_len) | |
985 | { | |
986 | struct ieee802_1x_hdr *hdr; | |
987 | struct wpa_eapol_key *key; | |
988 | u16 key_info, key_data_length; | |
a0bf1b68 | 989 | enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST } msg; |
6fc6879b JM |
990 | char *msgtxt; |
991 | struct wpa_eapol_ie_parse kde; | |
3b5b7aa8 JM |
992 | const u8 *key_data; |
993 | size_t keyhdrlen, mic_len; | |
6d014ffc | 994 | u8 *mic; |
6fc6879b JM |
995 | |
996 | if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL) | |
997 | return; | |
dc5bad48 | 998 | wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL data", data, data_len); |
6fc6879b | 999 | |
567da5bb | 1000 | mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len); |
6d014ffc | 1001 | keyhdrlen = sizeof(*key) + mic_len + 2; |
5e3b5197 | 1002 | |
dc5bad48 JM |
1003 | if (data_len < sizeof(*hdr) + keyhdrlen) { |
1004 | wpa_printf(MSG_DEBUG, "WPA: Ignore too short EAPOL-Key frame"); | |
6fc6879b | 1005 | return; |
dc5bad48 | 1006 | } |
6fc6879b JM |
1007 | |
1008 | hdr = (struct ieee802_1x_hdr *) data; | |
1009 | key = (struct wpa_eapol_key *) (hdr + 1); | |
6d014ffc | 1010 | mic = (u8 *) (key + 1); |
6fc6879b | 1011 | key_info = WPA_GET_BE16(key->key_info); |
6d014ffc JM |
1012 | key_data = mic + mic_len + 2; |
1013 | key_data_length = WPA_GET_BE16(mic + mic_len); | |
0d442aff | 1014 | wpa_printf(MSG_DEBUG, "WPA: Received EAPOL-Key from " MACSTR |
dc5bad48 JM |
1015 | " key_info=0x%x type=%u mic_len=%u key_data_length=%u", |
1016 | MAC2STR(sm->addr), key_info, key->type, | |
1017 | (unsigned int) mic_len, key_data_length); | |
1018 | wpa_hexdump(MSG_MSGDUMP, | |
1019 | "WPA: EAPOL-Key header (ending before Key MIC)", | |
1020 | key, sizeof(*key)); | |
1021 | wpa_hexdump(MSG_MSGDUMP, "WPA: EAPOL-Key Key MIC", | |
1022 | mic, mic_len); | |
5e3b5197 | 1023 | if (key_data_length > data_len - sizeof(*hdr) - keyhdrlen) { |
6fc6879b JM |
1024 | wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - " |
1025 | "key_data overflow (%d > %lu)", | |
1026 | key_data_length, | |
1027 | (unsigned long) (data_len - sizeof(*hdr) - | |
5e3b5197 | 1028 | keyhdrlen)); |
6fc6879b JM |
1029 | return; |
1030 | } | |
1031 | ||
f8e96eb6 | 1032 | if (sm->wpa == WPA_VERSION_WPA2) { |
74590e71 JM |
1033 | if (key->type == EAPOL_KEY_TYPE_WPA) { |
1034 | /* | |
1035 | * Some deployed station implementations seem to send | |
1036 | * msg 4/4 with incorrect type value in WPA2 mode. | |
1037 | */ | |
1038 | wpa_printf(MSG_DEBUG, "Workaround: Allow EAPOL-Key " | |
1039 | "with unexpected WPA type in RSN mode"); | |
1040 | } else if (key->type != EAPOL_KEY_TYPE_RSN) { | |
f8e96eb6 JM |
1041 | wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with " |
1042 | "unexpected type %d in RSN mode", | |
1043 | key->type); | |
1044 | return; | |
1045 | } | |
1046 | } else { | |
1047 | if (key->type != EAPOL_KEY_TYPE_WPA) { | |
1048 | wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with " | |
1049 | "unexpected type %d in WPA mode", | |
1050 | key->type); | |
1051 | return; | |
1052 | } | |
1053 | } | |
1054 | ||
bc8318ac JM |
1055 | wpa_hexdump(MSG_DEBUG, "WPA: Received Key Nonce", key->key_nonce, |
1056 | WPA_NONCE_LEN); | |
1057 | wpa_hexdump(MSG_DEBUG, "WPA: Received Replay Counter", | |
1058 | key->replay_counter, WPA_REPLAY_COUNTER_LEN); | |
1059 | ||
6fc6879b JM |
1060 | /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys |
1061 | * are set */ | |
1062 | ||
a0bf1b68 JM |
1063 | if (key_info & WPA_KEY_INFO_SMK_MESSAGE) { |
1064 | wpa_printf(MSG_DEBUG, "WPA: Ignore SMK message"); | |
1065 | return; | |
1066 | } | |
1067 | ||
1068 | if (key_info & WPA_KEY_INFO_REQUEST) { | |
6fc6879b JM |
1069 | msg = REQUEST; |
1070 | msgtxt = "Request"; | |
1071 | } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) { | |
1072 | msg = GROUP_2; | |
1073 | msgtxt = "2/2 Group"; | |
3b5b7aa8 JM |
1074 | } else if (key_data_length == 0 || |
1075 | (mic_len == 0 && (key_info & WPA_KEY_INFO_ENCR_KEY_DATA) && | |
1076 | key_data_length == AES_BLOCK_SIZE)) { | |
6fc6879b JM |
1077 | msg = PAIRWISE_4; |
1078 | msgtxt = "4/4 Pairwise"; | |
1079 | } else { | |
1080 | msg = PAIRWISE_2; | |
1081 | msgtxt = "2/4 Pairwise"; | |
1082 | } | |
1083 | ||
6fc6879b JM |
1084 | if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 || |
1085 | msg == GROUP_2) { | |
1086 | u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK; | |
eb7719ff JM |
1087 | if (sm->pairwise == WPA_CIPHER_CCMP || |
1088 | sm->pairwise == WPA_CIPHER_GCMP) { | |
4bc801ab JM |
1089 | if (wpa_use_cmac(sm->wpa_key_mgmt) && |
1090 | !wpa_use_akm_defined(sm->wpa_key_mgmt) && | |
6fc6879b JM |
1091 | ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) { |
1092 | wpa_auth_logger(wpa_auth, sm->addr, | |
1093 | LOGGER_WARNING, | |
1094 | "advertised support for " | |
1095 | "AES-128-CMAC, but did not " | |
1096 | "use it"); | |
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, | |
1105 | "did not use HMAC-SHA1-AES " | |
eb7719ff | 1106 | "with CCMP/GCMP"); |
6fc6879b JM |
1107 | return; |
1108 | } | |
1109 | } | |
929a2ea5 | 1110 | |
4bc801ab | 1111 | if (wpa_use_akm_defined(sm->wpa_key_mgmt) && |
929a2ea5 JM |
1112 | ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) { |
1113 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING, | |
1114 | "did not use EAPOL-Key descriptor version 0 as required for AKM-defined cases"); | |
1115 | return; | |
1116 | } | |
6fc6879b JM |
1117 | } |
1118 | ||
1119 | if (key_info & WPA_KEY_INFO_REQUEST) { | |
1120 | if (sm->req_replay_counter_used && | |
1121 | os_memcmp(key->replay_counter, sm->req_replay_counter, | |
1122 | WPA_REPLAY_COUNTER_LEN) <= 0) { | |
1123 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING, | |
1124 | "received EAPOL-Key request with " | |
1125 | "replayed counter"); | |
1126 | return; | |
1127 | } | |
1128 | } | |
1129 | ||
1130 | if (!(key_info & WPA_KEY_INFO_REQUEST) && | |
68921e24 | 1131 | !wpa_replay_counter_valid(sm->key_replay, key->replay_counter)) { |
22a299ee | 1132 | int i; |
68921e24 JM |
1133 | |
1134 | if (msg == PAIRWISE_2 && | |
1135 | wpa_replay_counter_valid(sm->prev_key_replay, | |
1136 | key->replay_counter) && | |
1137 | sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING && | |
1138 | os_memcmp(sm->SNonce, key->key_nonce, WPA_NONCE_LEN) != 0) | |
1139 | { | |
1140 | /* | |
1141 | * Some supplicant implementations (e.g., Windows XP | |
1142 | * WZC) update SNonce for each EAPOL-Key 2/4. This | |
1143 | * breaks the workaround on accepting any of the | |
1144 | * pending requests, so allow the SNonce to be updated | |
1145 | * even if we have already sent out EAPOL-Key 3/4. | |
1146 | */ | |
1147 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1148 | "Process SNonce update from STA " | |
1149 | "based on retransmitted EAPOL-Key " | |
1150 | "1/4"); | |
1151 | sm->update_snonce = 1; | |
f23c5b17 JM |
1152 | os_memcpy(sm->alt_SNonce, sm->SNonce, WPA_NONCE_LEN); |
1153 | sm->alt_snonce_valid = TRUE; | |
1154 | os_memcpy(sm->alt_replay_counter, | |
1155 | sm->key_replay[0].counter, | |
1156 | WPA_REPLAY_COUNTER_LEN); | |
1157 | goto continue_processing; | |
1158 | } | |
1159 | ||
1160 | if (msg == PAIRWISE_4 && sm->alt_snonce_valid && | |
1161 | sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING && | |
1162 | os_memcmp(key->replay_counter, sm->alt_replay_counter, | |
1163 | WPA_REPLAY_COUNTER_LEN) == 0) { | |
1164 | /* | |
1165 | * Supplicant may still be using the old SNonce since | |
1166 | * there was two EAPOL-Key 2/4 messages and they had | |
1167 | * different SNonce values. | |
1168 | */ | |
1169 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1170 | "Try to process received EAPOL-Key 4/4 based on old Replay Counter and SNonce from an earlier EAPOL-Key 1/4"); | |
68921e24 JM |
1171 | goto continue_processing; |
1172 | } | |
1173 | ||
1174 | if (msg == PAIRWISE_2 && | |
1175 | wpa_replay_counter_valid(sm->prev_key_replay, | |
1176 | key->replay_counter) && | |
1177 | sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING) { | |
1178 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1179 | "ignore retransmitted EAPOL-Key %s - " | |
1180 | "SNonce did not change", msgtxt); | |
1181 | } else { | |
1182 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1183 | "received EAPOL-Key %s with " | |
1184 | "unexpected replay counter", msgtxt); | |
1185 | } | |
22a299ee JM |
1186 | for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) { |
1187 | if (!sm->key_replay[i].valid) | |
1188 | break; | |
1189 | wpa_hexdump(MSG_DEBUG, "pending replay counter", | |
1190 | sm->key_replay[i].counter, | |
1191 | WPA_REPLAY_COUNTER_LEN); | |
1192 | } | |
6fc6879b JM |
1193 | wpa_hexdump(MSG_DEBUG, "received replay counter", |
1194 | key->replay_counter, WPA_REPLAY_COUNTER_LEN); | |
1195 | return; | |
1196 | } | |
1197 | ||
68921e24 | 1198 | continue_processing: |
3b5b7aa8 JM |
1199 | #ifdef CONFIG_FILS |
1200 | if (sm->wpa == WPA_VERSION_WPA2 && mic_len == 0 && | |
1201 | !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { | |
1202 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1203 | "WPA: Encr Key Data bit not set even though AEAD cipher is supposed to be used - drop frame"); | |
1204 | return; | |
1205 | } | |
1206 | #endif /* CONFIG_FILS */ | |
1207 | ||
6fc6879b JM |
1208 | switch (msg) { |
1209 | case PAIRWISE_2: | |
1210 | if (sm->wpa_ptk_state != WPA_PTK_PTKSTART && | |
68921e24 JM |
1211 | sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING && |
1212 | (!sm->update_snonce || | |
1213 | sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING)) { | |
6fc6879b JM |
1214 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, |
1215 | "received EAPOL-Key msg 2/4 in " | |
1216 | "invalid state (%d) - dropped", | |
1217 | sm->wpa_ptk_state); | |
1218 | return; | |
1219 | } | |
bbb921da | 1220 | random_add_randomness(key->key_nonce, WPA_NONCE_LEN); |
08704cd8 JM |
1221 | if (sm->group->reject_4way_hs_for_entropy) { |
1222 | /* | |
1223 | * The system did not have enough entropy to generate | |
1224 | * strong random numbers. Reject the first 4-way | |
1225 | * handshake(s) and collect some entropy based on the | |
1226 | * information from it. Once enough entropy is | |
1227 | * available, the next atempt will trigger GMK/Key | |
1228 | * Counter update and the station will be allowed to | |
1229 | * continue. | |
1230 | */ | |
1231 | wpa_printf(MSG_DEBUG, "WPA: Reject 4-way handshake to " | |
1232 | "collect more entropy for random number " | |
1233 | "generation"); | |
08704cd8 | 1234 | random_mark_pool_ready(); |
567da5bb JM |
1235 | wpa_sta_disconnect(wpa_auth, sm->addr, |
1236 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
08704cd8 JM |
1237 | return; |
1238 | } | |
6fc6879b JM |
1239 | break; |
1240 | case PAIRWISE_4: | |
1241 | if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING || | |
1242 | !sm->PTK_valid) { | |
1243 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
1244 | "received EAPOL-Key msg 4/4 in " | |
1245 | "invalid state (%d) - dropped", | |
1246 | sm->wpa_ptk_state); | |
1247 | return; | |
1248 | } | |
1249 | break; | |
1250 | case GROUP_2: | |
1251 | if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING | |
1252 | || !sm->PTK_valid) { | |
1253 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
1254 | "received EAPOL-Key msg 2/2 in " | |
1255 | "invalid state (%d) - dropped", | |
1256 | sm->wpa_ptk_group_state); | |
1257 | return; | |
1258 | } | |
1259 | break; | |
6fc6879b JM |
1260 | case REQUEST: |
1261 | break; | |
1262 | } | |
1263 | ||
1264 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1265 | "received EAPOL-Key frame (%s)", msgtxt); | |
1266 | ||
1267 | if (key_info & WPA_KEY_INFO_ACK) { | |
1268 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1269 | "received invalid EAPOL-Key: Key Ack set"); | |
1270 | return; | |
1271 | } | |
1272 | ||
b9866483 JM |
1273 | if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt) && |
1274 | !(key_info & WPA_KEY_INFO_MIC)) { | |
6fc6879b JM |
1275 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, |
1276 | "received invalid EAPOL-Key: Key MIC not set"); | |
1277 | return; | |
1278 | } | |
1279 | ||
b9866483 JM |
1280 | #ifdef CONFIG_FILS |
1281 | if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) && | |
1282 | (key_info & WPA_KEY_INFO_MIC)) { | |
1283 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1284 | "received invalid EAPOL-Key: Key MIC set"); | |
1285 | return; | |
1286 | } | |
1287 | #endif /* CONFIG_FILS */ | |
1288 | ||
6fc6879b | 1289 | sm->MICVerified = FALSE; |
68921e24 | 1290 | if (sm->PTK_valid && !sm->update_snonce) { |
3b5b7aa8 | 1291 | if (mic_len && |
567da5bb JM |
1292 | wpa_verify_key_mic(sm->wpa_key_mgmt, sm->pmk_len, &sm->PTK, |
1293 | data, data_len) && | |
f23c5b17 JM |
1294 | (msg != PAIRWISE_4 || !sm->alt_snonce_valid || |
1295 | wpa_try_alt_snonce(sm, data, data_len))) { | |
6fc6879b JM |
1296 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, |
1297 | "received EAPOL-Key with invalid MIC"); | |
525923b1 JM |
1298 | #ifdef TEST_FUZZ |
1299 | wpa_printf(MSG_INFO, | |
1300 | "TEST: Ignore Key MIC failure for fuzz testing"); | |
1301 | goto continue_fuzz; | |
1302 | #endif /* TEST_FUZZ */ | |
6fc6879b JM |
1303 | return; |
1304 | } | |
75c8563e JM |
1305 | #ifdef CONFIG_FILS |
1306 | if (!mic_len && | |
1307 | wpa_aead_decrypt(sm, &sm->PTK, data, data_len, | |
1308 | &key_data_length) < 0) { | |
1309 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1310 | "received EAPOL-Key with invalid MIC"); | |
525923b1 JM |
1311 | #ifdef TEST_FUZZ |
1312 | wpa_printf(MSG_INFO, | |
1313 | "TEST: Ignore Key MIC failure for fuzz testing"); | |
1314 | goto continue_fuzz; | |
1315 | #endif /* TEST_FUZZ */ | |
75c8563e JM |
1316 | return; |
1317 | } | |
1318 | #endif /* CONFIG_FILS */ | |
525923b1 JM |
1319 | #ifdef TEST_FUZZ |
1320 | continue_fuzz: | |
1321 | #endif /* TEST_FUZZ */ | |
6fc6879b JM |
1322 | sm->MICVerified = TRUE; |
1323 | eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm); | |
e4bf4db9 | 1324 | sm->pending_1_of_4_timeout = 0; |
6fc6879b JM |
1325 | } |
1326 | ||
1327 | if (key_info & WPA_KEY_INFO_REQUEST) { | |
1328 | if (sm->MICVerified) { | |
1329 | sm->req_replay_counter_used = 1; | |
1330 | os_memcpy(sm->req_replay_counter, key->replay_counter, | |
1331 | WPA_REPLAY_COUNTER_LEN); | |
1332 | } else { | |
1333 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1334 | "received EAPOL-Key request with " | |
1335 | "invalid MIC"); | |
1336 | return; | |
1337 | } | |
1338 | ||
1339 | /* | |
1340 | * TODO: should decrypt key data field if encryption was used; | |
1341 | * even though MAC address KDE is not normally encrypted, | |
1342 | * supplicant is allowed to encrypt it. | |
1343 | */ | |
a0bf1b68 | 1344 | if (key_info & WPA_KEY_INFO_ERROR) { |
c772d054 JM |
1345 | if (wpa_receive_error_report( |
1346 | wpa_auth, sm, | |
1347 | !(key_info & WPA_KEY_INFO_KEY_TYPE)) > 0) | |
1348 | return; /* STA entry was removed */ | |
6fc6879b JM |
1349 | } else if (key_info & WPA_KEY_INFO_KEY_TYPE) { |
1350 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1351 | "received EAPOL-Key Request for new " | |
1352 | "4-Way Handshake"); | |
1353 | wpa_request_new_ptk(sm); | |
6fc6879b | 1354 | } else if (key_data_length > 0 && |
5e3b5197 JM |
1355 | wpa_parse_kde_ies(key_data, key_data_length, |
1356 | &kde) == 0 && | |
6fc6879b JM |
1357 | kde.mac_addr) { |
1358 | } else { | |
1359 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1360 | "received EAPOL-Key Request for GTK " | |
1361 | "rekeying"); | |
6fc6879b JM |
1362 | eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL); |
1363 | wpa_rekey_gtk(wpa_auth, NULL); | |
1364 | } | |
1365 | } else { | |
68921e24 JM |
1366 | /* Do not allow the same key replay counter to be reused. */ |
1367 | wpa_replay_counter_mark_invalid(sm->key_replay, | |
1368 | key->replay_counter); | |
1369 | ||
1370 | if (msg == PAIRWISE_2) { | |
1371 | /* | |
1372 | * Maintain a copy of the pending EAPOL-Key frames in | |
1373 | * case the EAPOL-Key frame was retransmitted. This is | |
1374 | * needed to allow EAPOL-Key msg 2/4 reply to another | |
1375 | * pending msg 1/4 to update the SNonce to work around | |
1376 | * unexpected supplicant behavior. | |
1377 | */ | |
1378 | os_memcpy(sm->prev_key_replay, sm->key_replay, | |
1379 | sizeof(sm->key_replay)); | |
1380 | } else { | |
1381 | os_memset(sm->prev_key_replay, 0, | |
1382 | sizeof(sm->prev_key_replay)); | |
1383 | } | |
1384 | ||
1385 | /* | |
1386 | * Make sure old valid counters are not accepted anymore and | |
1387 | * do not get copied again. | |
1388 | */ | |
1389 | wpa_replay_counter_mark_invalid(sm->key_replay, NULL); | |
6fc6879b JM |
1390 | } |
1391 | ||
6fc6879b | 1392 | os_free(sm->last_rx_eapol_key); |
a1f11e34 | 1393 | sm->last_rx_eapol_key = os_memdup(data, data_len); |
6fc6879b JM |
1394 | if (sm->last_rx_eapol_key == NULL) |
1395 | return; | |
6fc6879b JM |
1396 | sm->last_rx_eapol_key_len = data_len; |
1397 | ||
0d442aff | 1398 | sm->rx_eapol_key_secure = !!(key_info & WPA_KEY_INFO_SECURE); |
6fc6879b JM |
1399 | sm->EAPOLKeyReceived = TRUE; |
1400 | sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE); | |
1401 | sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST); | |
1402 | os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN); | |
1403 | wpa_sm_step(sm); | |
1404 | } | |
1405 | ||
1406 | ||
3c7302c2 JM |
1407 | static int wpa_gmk_to_gtk(const u8 *gmk, const char *label, const u8 *addr, |
1408 | const u8 *gnonce, u8 *gtk, size_t gtk_len) | |
6fc6879b | 1409 | { |
c6eb3e34 | 1410 | u8 data[ETH_ALEN + WPA_NONCE_LEN + 8 + WPA_GTK_MAX_LEN]; |
5cb9d5c3 | 1411 | u8 *pos; |
3c7302c2 | 1412 | int ret = 0; |
6fc6879b | 1413 | |
5cb9d5c3 JM |
1414 | /* GTK = PRF-X(GMK, "Group key expansion", |
1415 | * AA || GNonce || Time || random data) | |
1416 | * The example described in the IEEE 802.11 standard uses only AA and | |
1417 | * GNonce as inputs here. Add some more entropy since this derivation | |
1418 | * is done only at the Authenticator and as such, does not need to be | |
1419 | * exactly same. | |
1420 | */ | |
c6eb3e34 | 1421 | os_memset(data, 0, sizeof(data)); |
6fc6879b JM |
1422 | os_memcpy(data, addr, ETH_ALEN); |
1423 | os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN); | |
5cb9d5c3 JM |
1424 | pos = data + ETH_ALEN + WPA_NONCE_LEN; |
1425 | wpa_get_ntp_timestamp(pos); | |
525923b1 JM |
1426 | #ifdef TEST_FUZZ |
1427 | os_memset(pos, 0xef, 8); | |
1428 | #endif /* TEST_FUZZ */ | |
5cb9d5c3 | 1429 | pos += 8; |
c6eb3e34 | 1430 | if (random_get_bytes(pos, gtk_len) < 0) |
3c7302c2 | 1431 | ret = -1; |
6fc6879b | 1432 | |
c6eb3e34 JM |
1433 | #ifdef CONFIG_SHA384 |
1434 | if (sha384_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), | |
1435 | gtk, gtk_len) < 0) | |
3c7302c2 | 1436 | ret = -1; |
c6eb3e34 JM |
1437 | #else /* CONFIG_SHA384 */ |
1438 | #ifdef CONFIG_SHA256 | |
1439 | if (sha256_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), | |
1440 | gtk, gtk_len) < 0) | |
1441 | ret = -1; | |
1442 | #else /* CONFIG_SHA256 */ | |
1443 | if (sha1_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), | |
1444 | gtk, gtk_len) < 0) | |
1445 | ret = -1; | |
1446 | #endif /* CONFIG_SHA256 */ | |
1447 | #endif /* CONFIG_SHA384 */ | |
3c7302c2 | 1448 | |
31bc66e4 JM |
1449 | forced_memzero(data, sizeof(data)); |
1450 | ||
3c7302c2 | 1451 | return ret; |
6fc6879b JM |
1452 | } |
1453 | ||
1454 | ||
1455 | static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx) | |
1456 | { | |
1457 | struct wpa_authenticator *wpa_auth = eloop_ctx; | |
1458 | struct wpa_state_machine *sm = timeout_ctx; | |
1459 | ||
e4bf4db9 | 1460 | sm->pending_1_of_4_timeout = 0; |
6fc6879b JM |
1461 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout"); |
1462 | sm->TimeoutEvt = TRUE; | |
1463 | wpa_sm_step(sm); | |
1464 | } | |
1465 | ||
1466 | ||
1467 | void __wpa_send_eapol(struct wpa_authenticator *wpa_auth, | |
1468 | struct wpa_state_machine *sm, int key_info, | |
1469 | const u8 *key_rsc, const u8 *nonce, | |
1470 | const u8 *kde, size_t kde_len, | |
1471 | int keyidx, int encr, int force_version) | |
1472 | { | |
1473 | struct ieee802_1x_hdr *hdr; | |
1474 | struct wpa_eapol_key *key; | |
5e3b5197 | 1475 | size_t len, mic_len, keyhdrlen; |
6fc6879b JM |
1476 | int alg; |
1477 | int key_data_len, pad_len = 0; | |
1478 | u8 *buf, *pos; | |
1479 | int version, pairwise; | |
22a299ee | 1480 | int i; |
6d014ffc | 1481 | u8 *key_mic, *key_data; |
6fc6879b | 1482 | |
567da5bb | 1483 | mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len); |
6d014ffc | 1484 | keyhdrlen = sizeof(*key) + mic_len + 2; |
5e3b5197 JM |
1485 | |
1486 | len = sizeof(struct ieee802_1x_hdr) + keyhdrlen; | |
6fc6879b JM |
1487 | |
1488 | if (force_version) | |
1489 | version = force_version; | |
4bc801ab | 1490 | else if (wpa_use_akm_defined(sm->wpa_key_mgmt)) |
a14896e8 | 1491 | version = WPA_KEY_INFO_TYPE_AKM_DEFINED; |
4bc801ab | 1492 | else if (wpa_use_cmac(sm->wpa_key_mgmt)) |
6fc6879b | 1493 | version = WPA_KEY_INFO_TYPE_AES_128_CMAC; |
eb7719ff | 1494 | else if (sm->pairwise != WPA_CIPHER_TKIP) |
6fc6879b JM |
1495 | version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES; |
1496 | else | |
1497 | version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4; | |
1498 | ||
8543ed8a | 1499 | pairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE); |
6fc6879b JM |
1500 | |
1501 | wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d " | |
1502 | "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d " | |
1503 | "encr=%d)", | |
1504 | version, | |
1505 | (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0, | |
1506 | (key_info & WPA_KEY_INFO_MIC) ? 1 : 0, | |
1507 | (key_info & WPA_KEY_INFO_ACK) ? 1 : 0, | |
1508 | (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0, | |
1509 | pairwise, (unsigned long) kde_len, keyidx, encr); | |
1510 | ||
1511 | key_data_len = kde_len; | |
1512 | ||
1513 | if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || | |
4bc801ab | 1514 | wpa_use_aes_key_wrap(sm->wpa_key_mgmt) || |
6fc6879b JM |
1515 | version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) { |
1516 | pad_len = key_data_len % 8; | |
1517 | if (pad_len) | |
1518 | pad_len = 8 - pad_len; | |
1519 | key_data_len += pad_len + 8; | |
1520 | } | |
1521 | ||
1522 | len += key_data_len; | |
b729fd8d JM |
1523 | if (!mic_len && encr) |
1524 | len += AES_BLOCK_SIZE; | |
6fc6879b JM |
1525 | |
1526 | hdr = os_zalloc(len); | |
1527 | if (hdr == NULL) | |
1528 | return; | |
1529 | hdr->version = wpa_auth->conf.eapol_version; | |
1530 | hdr->type = IEEE802_1X_TYPE_EAPOL_KEY; | |
1531 | hdr->length = host_to_be16(len - sizeof(*hdr)); | |
1532 | key = (struct wpa_eapol_key *) (hdr + 1); | |
6d014ffc | 1533 | key_mic = (u8 *) (key + 1); |
5e3b5197 | 1534 | key_data = ((u8 *) (hdr + 1)) + keyhdrlen; |
6fc6879b JM |
1535 | |
1536 | key->type = sm->wpa == WPA_VERSION_WPA2 ? | |
1537 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; | |
1538 | key_info |= version; | |
1539 | if (encr && sm->wpa == WPA_VERSION_WPA2) | |
1540 | key_info |= WPA_KEY_INFO_ENCR_KEY_DATA; | |
1541 | if (sm->wpa != WPA_VERSION_WPA2) | |
1542 | key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT; | |
1543 | WPA_PUT_BE16(key->key_info, key_info); | |
1544 | ||
1545 | alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group; | |
a0bf1b68 | 1546 | if (sm->wpa == WPA_VERSION_WPA2 && !pairwise) |
6fc6879b | 1547 | WPA_PUT_BE16(key->key_length, 0); |
caab23f1 JM |
1548 | else |
1549 | WPA_PUT_BE16(key->key_length, wpa_cipher_key_len(alg)); | |
6fc6879b | 1550 | |
22a299ee JM |
1551 | for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) { |
1552 | sm->key_replay[i].valid = sm->key_replay[i - 1].valid; | |
1553 | os_memcpy(sm->key_replay[i].counter, | |
1554 | sm->key_replay[i - 1].counter, | |
1555 | WPA_REPLAY_COUNTER_LEN); | |
1556 | } | |
1557 | inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN); | |
1558 | os_memcpy(key->replay_counter, sm->key_replay[0].counter, | |
6fc6879b | 1559 | WPA_REPLAY_COUNTER_LEN); |
db099951 JM |
1560 | wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter", |
1561 | key->replay_counter, WPA_REPLAY_COUNTER_LEN); | |
22a299ee | 1562 | sm->key_replay[0].valid = TRUE; |
6fc6879b JM |
1563 | |
1564 | if (nonce) | |
1565 | os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN); | |
1566 | ||
1567 | if (key_rsc) | |
1568 | os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN); | |
1569 | ||
1570 | if (kde && !encr) { | |
5e3b5197 | 1571 | os_memcpy(key_data, kde, kde_len); |
6d014ffc | 1572 | WPA_PUT_BE16(key_mic + mic_len, kde_len); |
b729fd8d | 1573 | #ifdef CONFIG_FILS |
c05f96a3 | 1574 | } else if (!mic_len && kde) { |
b729fd8d JM |
1575 | const u8 *aad[1]; |
1576 | size_t aad_len[1]; | |
1577 | ||
1578 | WPA_PUT_BE16(key_mic, AES_BLOCK_SIZE + kde_len); | |
1579 | wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data", | |
1580 | kde, kde_len); | |
1581 | ||
1582 | wpa_hexdump_key(MSG_DEBUG, "WPA: KEK", | |
1583 | sm->PTK.kek, sm->PTK.kek_len); | |
1584 | /* AES-SIV AAD from EAPOL protocol version field (inclusive) to | |
1585 | * to Key Data (exclusive). */ | |
1586 | aad[0] = (u8 *) hdr; | |
1587 | aad_len[0] = key_mic + 2 - (u8 *) hdr; | |
1588 | if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len, kde, kde_len, | |
1589 | 1, aad, aad_len, key_mic + 2) < 0) { | |
1590 | wpa_printf(MSG_DEBUG, "WPA: AES-SIV encryption failed"); | |
1591 | return; | |
1592 | } | |
1593 | ||
1594 | wpa_hexdump(MSG_DEBUG, "WPA: Encrypted Key Data from SIV", | |
1595 | key_mic + 2, AES_BLOCK_SIZE + kde_len); | |
1596 | #endif /* CONFIG_FILS */ | |
6fc6879b JM |
1597 | } else if (encr && kde) { |
1598 | buf = os_zalloc(key_data_len); | |
1599 | if (buf == NULL) { | |
1600 | os_free(hdr); | |
1601 | return; | |
1602 | } | |
1603 | pos = buf; | |
1604 | os_memcpy(pos, kde, kde_len); | |
1605 | pos += kde_len; | |
1606 | ||
1607 | if (pad_len) | |
1608 | *pos++ = 0xdd; | |
1609 | ||
1610 | wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data", | |
1611 | buf, key_data_len); | |
1612 | if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || | |
4bc801ab | 1613 | wpa_use_aes_key_wrap(sm->wpa_key_mgmt) || |
6fc6879b | 1614 | version == WPA_KEY_INFO_TYPE_AES_128_CMAC) { |
ef9627cb JM |
1615 | wpa_printf(MSG_DEBUG, |
1616 | "WPA: Encrypt Key Data using AES-WRAP (KEK length %u)", | |
1617 | (unsigned int) sm->PTK.kek_len); | |
98cd3d1c | 1618 | if (aes_wrap(sm->PTK.kek, sm->PTK.kek_len, |
5e3b5197 | 1619 | (key_data_len - 8) / 8, buf, key_data)) { |
6fc6879b JM |
1620 | os_free(hdr); |
1621 | os_free(buf); | |
1622 | return; | |
1623 | } | |
6d014ffc | 1624 | WPA_PUT_BE16(key_mic + mic_len, key_data_len); |
7cb53ded | 1625 | #ifndef CONFIG_NO_RC4 |
98cd3d1c | 1626 | } else if (sm->PTK.kek_len == 16) { |
6fc6879b | 1627 | u8 ek[32]; |
ef9627cb JM |
1628 | |
1629 | wpa_printf(MSG_DEBUG, | |
1630 | "WPA: Encrypt Key Data using RC4"); | |
6fc6879b JM |
1631 | os_memcpy(key->key_iv, |
1632 | sm->group->Counter + WPA_NONCE_LEN - 16, 16); | |
1633 | inc_byte_array(sm->group->Counter, WPA_NONCE_LEN); | |
1634 | os_memcpy(ek, key->key_iv, 16); | |
98cd3d1c | 1635 | os_memcpy(ek + 16, sm->PTK.kek, sm->PTK.kek_len); |
5e3b5197 JM |
1636 | os_memcpy(key_data, buf, key_data_len); |
1637 | rc4_skip(ek, 32, 256, key_data, key_data_len); | |
6d014ffc | 1638 | WPA_PUT_BE16(key_mic + mic_len, key_data_len); |
7cb53ded | 1639 | #endif /* CONFIG_NO_RC4 */ |
98cd3d1c JM |
1640 | } else { |
1641 | os_free(hdr); | |
1642 | os_free(buf); | |
1643 | return; | |
6fc6879b JM |
1644 | } |
1645 | os_free(buf); | |
1646 | } | |
1647 | ||
1648 | if (key_info & WPA_KEY_INFO_MIC) { | |
b729fd8d | 1649 | if (!sm->PTK_valid || !mic_len) { |
6fc6879b JM |
1650 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, |
1651 | "PTK not valid when sending EAPOL-Key " | |
1652 | "frame"); | |
1653 | os_free(hdr); | |
1654 | return; | |
1655 | } | |
5e3b5197 | 1656 | |
beae255a JM |
1657 | if (wpa_eapol_key_mic(sm->PTK.kck, sm->PTK.kck_len, |
1658 | sm->wpa_key_mgmt, version, | |
1659 | (u8 *) hdr, len, key_mic) < 0) { | |
1660 | os_free(hdr); | |
1661 | return; | |
1662 | } | |
7af092a0 JB |
1663 | #ifdef CONFIG_TESTING_OPTIONS |
1664 | if (!pairwise && | |
06df2aa6 | 1665 | wpa_auth->conf.corrupt_gtk_rekey_mic_probability > 0.0 && |
7af092a0 JB |
1666 | drand48() < |
1667 | wpa_auth->conf.corrupt_gtk_rekey_mic_probability) { | |
1668 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1669 | "Corrupting group EAPOL-Key Key MIC"); | |
5e3b5197 | 1670 | key_mic[0]++; |
7af092a0 JB |
1671 | } |
1672 | #endif /* CONFIG_TESTING_OPTIONS */ | |
6fc6879b JM |
1673 | } |
1674 | ||
1675 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx, | |
1676 | 1); | |
1677 | wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len, | |
1678 | sm->pairwise_set); | |
1679 | os_free(hdr); | |
1680 | } | |
1681 | ||
1682 | ||
1683 | static void wpa_send_eapol(struct wpa_authenticator *wpa_auth, | |
1684 | struct wpa_state_machine *sm, int key_info, | |
1685 | const u8 *key_rsc, const u8 *nonce, | |
1686 | const u8 *kde, size_t kde_len, | |
1687 | int keyidx, int encr) | |
1688 | { | |
1689 | int timeout_ms; | |
1690 | int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE; | |
41f140d3 | 1691 | u32 ctr; |
6fc6879b JM |
1692 | |
1693 | if (sm == NULL) | |
1694 | return; | |
1695 | ||
1696 | __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len, | |
1697 | keyidx, encr, 0); | |
1698 | ||
bae61562 | 1699 | ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr; |
e4bf4db9 | 1700 | if (ctr == 1 && wpa_auth->conf.tx_status) |
00338a4f JM |
1701 | timeout_ms = pairwise ? eapol_key_timeout_first : |
1702 | eapol_key_timeout_first_group; | |
bae61562 JM |
1703 | else |
1704 | timeout_ms = eapol_key_timeout_subseq; | |
6f234c1e JM |
1705 | if (wpa_auth->conf.wpa_disable_eapol_key_retries && |
1706 | (!pairwise || (key_info & WPA_KEY_INFO_MIC))) | |
1707 | timeout_ms = eapol_key_timeout_no_retrans; | |
e4bf4db9 JM |
1708 | if (pairwise && ctr == 1 && !(key_info & WPA_KEY_INFO_MIC)) |
1709 | sm->pending_1_of_4_timeout = 1; | |
525923b1 JM |
1710 | #ifdef TEST_FUZZ |
1711 | timeout_ms = 1; | |
1712 | #endif /* TEST_FUZZ */ | |
e4bf4db9 | 1713 | wpa_printf(MSG_DEBUG, "WPA: Use EAPOL-Key timeout of %u ms (retry " |
41f140d3 | 1714 | "counter %u)", timeout_ms, ctr); |
6fc6879b JM |
1715 | eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000, |
1716 | wpa_send_eapol_timeout, wpa_auth, sm); | |
1717 | } | |
1718 | ||
1719 | ||
567da5bb JM |
1720 | static int wpa_verify_key_mic(int akmp, size_t pmk_len, struct wpa_ptk *PTK, |
1721 | u8 *data, size_t data_len) | |
6fc6879b JM |
1722 | { |
1723 | struct ieee802_1x_hdr *hdr; | |
1724 | struct wpa_eapol_key *key; | |
1725 | u16 key_info; | |
1726 | int ret = 0; | |
6d014ffc | 1727 | u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN], *mic_pos; |
567da5bb | 1728 | size_t mic_len = wpa_mic_len(akmp, pmk_len); |
6fc6879b JM |
1729 | |
1730 | if (data_len < sizeof(*hdr) + sizeof(*key)) | |
1731 | return -1; | |
1732 | ||
1733 | hdr = (struct ieee802_1x_hdr *) data; | |
1734 | key = (struct wpa_eapol_key *) (hdr + 1); | |
6d014ffc | 1735 | mic_pos = (u8 *) (key + 1); |
6fc6879b | 1736 | key_info = WPA_GET_BE16(key->key_info); |
6d014ffc JM |
1737 | os_memcpy(mic, mic_pos, mic_len); |
1738 | os_memset(mic_pos, 0, mic_len); | |
98cd3d1c JM |
1739 | if (wpa_eapol_key_mic(PTK->kck, PTK->kck_len, akmp, |
1740 | key_info & WPA_KEY_INFO_TYPE_MASK, | |
6d014ffc JM |
1741 | data, data_len, mic_pos) || |
1742 | os_memcmp_const(mic, mic_pos, mic_len) != 0) | |
6fc6879b | 1743 | ret = -1; |
6d014ffc | 1744 | os_memcpy(mic_pos, mic, mic_len); |
6fc6879b JM |
1745 | return ret; |
1746 | } | |
1747 | ||
1748 | ||
1749 | void wpa_remove_ptk(struct wpa_state_machine *sm) | |
1750 | { | |
1751 | sm->PTK_valid = FALSE; | |
1752 | os_memset(&sm->PTK, 0, sizeof(sm->PTK)); | |
2a0b86d3 | 1753 | if (wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, NULL, |
a919a260 | 1754 | 0, KEY_FLAG_PAIRWISE)) |
2a0b86d3 JM |
1755 | wpa_printf(MSG_DEBUG, |
1756 | "RSN: PTK removal from the driver failed"); | |
6fc6879b | 1757 | sm->pairwise_set = FALSE; |
581a8cde | 1758 | eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm); |
6fc6879b JM |
1759 | } |
1760 | ||
1761 | ||
bb119228 | 1762 | int wpa_auth_sm_event(struct wpa_state_machine *sm, enum wpa_event event) |
6fc6879b | 1763 | { |
5d22a1d5 JM |
1764 | int remove_ptk = 1; |
1765 | ||
6fc6879b | 1766 | if (sm == NULL) |
6f9b5d16 | 1767 | return -1; |
6fc6879b JM |
1768 | |
1769 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
1770 | "event %d notification", event); | |
1771 | ||
1772 | switch (event) { | |
1773 | case WPA_AUTH: | |
c50d94f1 BC |
1774 | #ifdef CONFIG_MESH |
1775 | /* PTKs are derived through AMPE */ | |
1776 | if (wpa_auth_start_ampe(sm->wpa_auth, sm->addr)) { | |
1777 | /* not mesh */ | |
1778 | break; | |
1779 | } | |
1780 | return 0; | |
1781 | #endif /* CONFIG_MESH */ | |
6fc6879b JM |
1782 | case WPA_ASSOC: |
1783 | break; | |
1784 | case WPA_DEAUTH: | |
1785 | case WPA_DISASSOC: | |
1786 | sm->DeauthenticationRequest = TRUE; | |
09ab81b9 JM |
1787 | #ifdef CONFIG_IEEE80211R_AP |
1788 | os_memset(sm->PMK, 0, sizeof(sm->PMK)); | |
1789 | sm->pmk_len = 0; | |
1790 | os_memset(sm->xxkey, 0, sizeof(sm->xxkey)); | |
1791 | sm->xxkey_len = 0; | |
8a576f5e JM |
1792 | os_memset(sm->pmk_r1, 0, sizeof(sm->pmk_r1)); |
1793 | sm->pmk_r1_len = 0; | |
09ab81b9 | 1794 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b JM |
1795 | break; |
1796 | case WPA_REAUTH: | |
1797 | case WPA_REAUTH_EAPOL: | |
3ab72b62 JM |
1798 | if (!sm->started) { |
1799 | /* | |
1800 | * When using WPS, we may end up here if the STA | |
1801 | * manages to re-associate without the previous STA | |
1802 | * entry getting removed. Consequently, we need to make | |
1803 | * sure that the WPA state machines gets initialized | |
1804 | * properly at this point. | |
1805 | */ | |
1806 | wpa_printf(MSG_DEBUG, "WPA state machine had not been " | |
1807 | "started - initialize now"); | |
1808 | sm->started = 1; | |
1809 | sm->Init = TRUE; | |
1810 | if (wpa_sm_step(sm) == 1) | |
1811 | return 1; /* should not really happen */ | |
1812 | sm->Init = FALSE; | |
1813 | sm->AuthenticationRequest = TRUE; | |
1814 | break; | |
1a7963e3 AW |
1815 | } else if (sm->wpa_auth->conf.wpa_deny_ptk0_rekey) { |
1816 | wpa_printf(MSG_INFO, | |
1817 | "WPA: PTK0 rekey not allowed, disconnect " | |
1818 | MACSTR, MAC2STR(sm->addr)); | |
1819 | sm->Disconnect = TRUE; | |
1820 | /* Try to encourage the STA reconnect */ | |
1821 | sm->disconnect_reason = | |
1822 | WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA; | |
1823 | break; | |
3ab72b62 | 1824 | } |
9663596f JM |
1825 | if (sm->GUpdateStationKeys) { |
1826 | /* | |
1827 | * Reauthentication cancels the pending group key | |
1828 | * update for this STA. | |
1829 | */ | |
1830 | sm->group->GKeyDoneStations--; | |
1831 | sm->GUpdateStationKeys = FALSE; | |
1832 | sm->PtkGroupInit = TRUE; | |
1833 | } | |
6fc6879b JM |
1834 | sm->ReAuthenticationRequest = TRUE; |
1835 | break; | |
1836 | case WPA_ASSOC_FT: | |
4ec1fd8e | 1837 | #ifdef CONFIG_IEEE80211R_AP |
81a658d7 JM |
1838 | wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration " |
1839 | "after association"); | |
1840 | wpa_ft_install_ptk(sm); | |
1841 | ||
6fc6879b JM |
1842 | /* Using FT protocol, not WPA auth state machine */ |
1843 | sm->ft_completed = 1; | |
d178ab0d | 1844 | wpa_auth_set_ptk_rekey_timer(sm); |
6f9b5d16 | 1845 | return 0; |
4ec1fd8e | 1846 | #else /* CONFIG_IEEE80211R_AP */ |
6fc6879b | 1847 | break; |
4ec1fd8e | 1848 | #endif /* CONFIG_IEEE80211R_AP */ |
957bff83 JM |
1849 | case WPA_ASSOC_FILS: |
1850 | #ifdef CONFIG_FILS | |
1851 | wpa_printf(MSG_DEBUG, | |
1852 | "FILS: TK configuration after association"); | |
1853 | fils_set_tk(sm); | |
1854 | sm->fils_completed = 1; | |
1855 | return 0; | |
1856 | #else /* CONFIG_FILS */ | |
1857 | break; | |
1858 | #endif /* CONFIG_FILS */ | |
0e3bd7ac MV |
1859 | case WPA_DRV_STA_REMOVED: |
1860 | sm->tk_already_set = FALSE; | |
1861 | return 0; | |
6fc6879b JM |
1862 | } |
1863 | ||
4ec1fd8e | 1864 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b | 1865 | sm->ft_completed = 0; |
4ec1fd8e | 1866 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b | 1867 | |
5d22a1d5 JM |
1868 | if (sm->mgmt_frame_prot && event == WPA_AUTH) |
1869 | remove_ptk = 0; | |
78815f3d | 1870 | #ifdef CONFIG_FILS |
da24c5aa JM |
1871 | if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) && |
1872 | (event == WPA_AUTH || event == WPA_ASSOC)) | |
78815f3d JM |
1873 | remove_ptk = 0; |
1874 | #endif /* CONFIG_FILS */ | |
6fc6879b | 1875 | |
5d22a1d5 JM |
1876 | if (remove_ptk) { |
1877 | sm->PTK_valid = FALSE; | |
1878 | os_memset(&sm->PTK, 0, sizeof(sm->PTK)); | |
1879 | ||
1880 | if (event != WPA_REAUTH_EAPOL) | |
1881 | wpa_remove_ptk(sm); | |
1882 | } | |
6fc6879b | 1883 | |
43f49c37 JM |
1884 | if (sm->in_step_loop) { |
1885 | /* | |
1886 | * wpa_sm_step() is already running - avoid recursive call to | |
1887 | * it by making the existing loop process the new update. | |
1888 | */ | |
1889 | sm->changed = TRUE; | |
1890 | return 0; | |
1891 | } | |
6f9b5d16 | 1892 | return wpa_sm_step(sm); |
6fc6879b JM |
1893 | } |
1894 | ||
1895 | ||
6fc6879b JM |
1896 | SM_STATE(WPA_PTK, INITIALIZE) |
1897 | { | |
1898 | SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk); | |
1899 | if (sm->Init) { | |
1900 | /* Init flag is not cleared here, so avoid busy | |
1901 | * loop by claiming nothing changed. */ | |
1902 | sm->changed = FALSE; | |
1903 | } | |
1904 | ||
1905 | sm->keycount = 0; | |
1906 | if (sm->GUpdateStationKeys) | |
1907 | sm->group->GKeyDoneStations--; | |
1908 | sm->GUpdateStationKeys = FALSE; | |
1909 | if (sm->wpa == WPA_VERSION_WPA) | |
1910 | sm->PInitAKeys = FALSE; | |
1911 | if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and | |
1912 | * Local AA > Remote AA)) */) { | |
1913 | sm->Pair = TRUE; | |
1914 | } | |
1915 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0); | |
1916 | wpa_remove_ptk(sm); | |
1917 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0); | |
1918 | sm->TimeoutCtr = 0; | |
a1ea1b45 | 1919 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) || |
567da5bb | 1920 | sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP || |
a1ea1b45 | 1921 | sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) { |
6fc6879b JM |
1922 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, |
1923 | WPA_EAPOL_authorized, 0); | |
1924 | } | |
1925 | } | |
1926 | ||
1927 | ||
1928 | SM_STATE(WPA_PTK, DISCONNECT) | |
1929 | { | |
567da5bb JM |
1930 | u16 reason = sm->disconnect_reason; |
1931 | ||
6fc6879b JM |
1932 | SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk); |
1933 | sm->Disconnect = FALSE; | |
567da5bb JM |
1934 | sm->disconnect_reason = 0; |
1935 | if (!reason) | |
1936 | reason = WLAN_REASON_PREV_AUTH_NOT_VALID; | |
1937 | wpa_sta_disconnect(sm->wpa_auth, sm->addr, reason); | |
6fc6879b JM |
1938 | } |
1939 | ||
1940 | ||
1941 | SM_STATE(WPA_PTK, DISCONNECTED) | |
1942 | { | |
1943 | SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk); | |
1944 | sm->DeauthenticationRequest = FALSE; | |
1945 | } | |
1946 | ||
1947 | ||
1948 | SM_STATE(WPA_PTK, AUTHENTICATION) | |
1949 | { | |
1950 | SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk); | |
1951 | os_memset(&sm->PTK, 0, sizeof(sm->PTK)); | |
1952 | sm->PTK_valid = FALSE; | |
1953 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto, | |
1954 | 1); | |
1955 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1); | |
1956 | sm->AuthenticationRequest = FALSE; | |
1957 | } | |
1958 | ||
1959 | ||
40d00d2b NC |
1960 | static void wpa_group_ensure_init(struct wpa_authenticator *wpa_auth, |
1961 | struct wpa_group *group) | |
1bdb7ab3 | 1962 | { |
40d00d2b NC |
1963 | if (group->first_sta_seen) |
1964 | return; | |
1bdb7ab3 JM |
1965 | /* |
1966 | * System has run bit further than at the time hostapd was started | |
1967 | * potentially very early during boot up. This provides better chances | |
1968 | * of collecting more randomness on embedded systems. Re-initialize the | |
1969 | * GMK and Counter here to improve their strength if there was not | |
1970 | * enough entropy available immediately after system startup. | |
1971 | */ | |
1972 | wpa_printf(MSG_DEBUG, "WPA: Re-initialize GMK/Counter on first " | |
1973 | "station"); | |
08704cd8 JM |
1974 | if (random_pool_ready() != 1) { |
1975 | wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool " | |
1976 | "to proceed - reject first 4-way handshake"); | |
1977 | group->reject_4way_hs_for_entropy = TRUE; | |
40d00d2b NC |
1978 | } else { |
1979 | group->first_sta_seen = TRUE; | |
1980 | group->reject_4way_hs_for_entropy = FALSE; | |
08704cd8 | 1981 | } |
40d00d2b | 1982 | |
aac1efec JM |
1983 | if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0 || |
1984 | wpa_gtk_update(wpa_auth, group) < 0 || | |
1985 | wpa_group_config_group_keys(wpa_auth, group) < 0) { | |
1986 | wpa_printf(MSG_INFO, "WPA: GMK/GTK setup failed"); | |
1987 | group->first_sta_seen = FALSE; | |
1988 | group->reject_4way_hs_for_entropy = TRUE; | |
1989 | } | |
1bdb7ab3 JM |
1990 | } |
1991 | ||
1992 | ||
6fc6879b JM |
1993 | SM_STATE(WPA_PTK, AUTHENTICATION2) |
1994 | { | |
1995 | SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk); | |
1bdb7ab3 | 1996 | |
40d00d2b | 1997 | wpa_group_ensure_init(sm->wpa_auth, sm->group); |
65a32cdb | 1998 | sm->ReAuthenticationRequest = FALSE; |
1bdb7ab3 | 1999 | |
3825a19b JM |
2000 | /* |
2001 | * Definition of ANonce selection in IEEE Std 802.11i-2004 is somewhat | |
2002 | * ambiguous. The Authenticator state machine uses a counter that is | |
2003 | * incremented by one for each 4-way handshake. However, the security | |
2004 | * analysis of 4-way handshake points out that unpredictable nonces | |
2005 | * help in preventing precomputation attacks. Instead of the state | |
2006 | * machine definition, use an unpredictable nonce value here to provide | |
2007 | * stronger protection against potential precomputation attacks. | |
2008 | */ | |
2009 | if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) { | |
2010 | wpa_printf(MSG_ERROR, "WPA: Failed to get random data for " | |
2011 | "ANonce."); | |
65a32cdb | 2012 | sm->Disconnect = TRUE; |
3825a19b JM |
2013 | return; |
2014 | } | |
bc8318ac JM |
2015 | wpa_hexdump(MSG_DEBUG, "WPA: Assign ANonce", sm->ANonce, |
2016 | WPA_NONCE_LEN); | |
6fc6879b JM |
2017 | /* IEEE 802.11i does not clear TimeoutCtr here, but this is more |
2018 | * logical place than INITIALIZE since AUTHENTICATION2 can be | |
2019 | * re-entered on ReAuthenticationRequest without going through | |
2020 | * INITIALIZE. */ | |
2021 | sm->TimeoutCtr = 0; | |
2022 | } | |
2023 | ||
2024 | ||
0adc9b28 JM |
2025 | static int wpa_auth_sm_ptk_update(struct wpa_state_machine *sm) |
2026 | { | |
2027 | if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) { | |
2028 | wpa_printf(MSG_ERROR, | |
2029 | "WPA: Failed to get random data for ANonce"); | |
2030 | sm->Disconnect = TRUE; | |
2031 | return -1; | |
2032 | } | |
2033 | wpa_hexdump(MSG_DEBUG, "WPA: Assign new ANonce", sm->ANonce, | |
2034 | WPA_NONCE_LEN); | |
2035 | sm->TimeoutCtr = 0; | |
2036 | return 0; | |
2037 | } | |
2038 | ||
2039 | ||
6fc6879b JM |
2040 | SM_STATE(WPA_PTK, INITPMK) |
2041 | { | |
2042 | u8 msk[2 * PMK_LEN]; | |
2043 | size_t len = 2 * PMK_LEN; | |
2044 | ||
2045 | SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk); | |
4ec1fd8e | 2046 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b | 2047 | sm->xxkey_len = 0; |
4ec1fd8e | 2048 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b JM |
2049 | if (sm->pmksa) { |
2050 | wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache"); | |
207976f0 JM |
2051 | os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len); |
2052 | sm->pmk_len = sm->pmksa->pmk_len; | |
567da5bb JM |
2053 | #ifdef CONFIG_DPP |
2054 | } else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP) { | |
2055 | wpa_printf(MSG_DEBUG, | |
2056 | "DPP: No PMKSA cache entry for STA - reject connection"); | |
2057 | sm->Disconnect = TRUE; | |
2058 | sm->disconnect_reason = WLAN_REASON_INVALID_PMKID; | |
2059 | return; | |
2060 | #endif /* CONFIG_DPP */ | |
6fc6879b | 2061 | } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) { |
207976f0 JM |
2062 | unsigned int pmk_len; |
2063 | ||
834c5d68 | 2064 | if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) |
207976f0 JM |
2065 | pmk_len = PMK_LEN_SUITE_B_192; |
2066 | else | |
2067 | pmk_len = PMK_LEN; | |
6fc6879b | 2068 | wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine " |
207976f0 JM |
2069 | "(MSK len=%lu PMK len=%u)", (unsigned long) len, |
2070 | pmk_len); | |
2071 | if (len < pmk_len) { | |
2072 | wpa_printf(MSG_DEBUG, | |
2073 | "WPA: MSK not long enough (%u) to create PMK (%u)", | |
2074 | (unsigned int) len, (unsigned int) pmk_len); | |
2075 | sm->Disconnect = TRUE; | |
2076 | return; | |
2077 | } | |
2078 | os_memcpy(sm->PMK, msk, pmk_len); | |
2079 | sm->pmk_len = pmk_len; | |
4ec1fd8e | 2080 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b | 2081 | if (len >= 2 * PMK_LEN) { |
9f12271b JM |
2082 | if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) { |
2083 | os_memcpy(sm->xxkey, msk, SHA384_MAC_LEN); | |
2084 | sm->xxkey_len = SHA384_MAC_LEN; | |
2085 | } else { | |
2086 | os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN); | |
2087 | sm->xxkey_len = PMK_LEN; | |
2088 | } | |
6fc6879b | 2089 | } |
4ec1fd8e | 2090 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b | 2091 | } else { |
400de9b1 | 2092 | wpa_printf(MSG_DEBUG, "WPA: Could not get PMK, get_msk: %p", |
cef8fac0 | 2093 | sm->wpa_auth->cb->get_msk); |
1180dd66 JM |
2094 | sm->Disconnect = TRUE; |
2095 | return; | |
6fc6879b | 2096 | } |
31bc66e4 | 2097 | forced_memzero(msk, sizeof(msk)); |
6fc6879b JM |
2098 | |
2099 | sm->req_replay_counter_used = 0; | |
2100 | /* IEEE 802.11i does not set keyRun to FALSE, but not doing this | |
2101 | * will break reauthentication since EAPOL state machines may not be | |
2102 | * get into AUTHENTICATING state that clears keyRun before WPA state | |
2103 | * machine enters AUTHENTICATION2 state and goes immediately to INITPMK | |
2104 | * state and takes PMK from the previously used AAA Key. This will | |
2105 | * eventually fail in 4-Way Handshake because Supplicant uses PMK | |
2106 | * derived from the new AAA Key. Setting keyRun = FALSE here seems to | |
2107 | * be good workaround for this issue. */ | |
2108 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0); | |
2109 | } | |
2110 | ||
2111 | ||
2112 | SM_STATE(WPA_PTK, INITPSK) | |
2113 | { | |
2114 | const u8 *psk; | |
7a12edd1 JM |
2115 | size_t psk_len; |
2116 | ||
6fc6879b | 2117 | SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk); |
7a12edd1 | 2118 | psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr, NULL, |
dbfa691d | 2119 | &psk_len, NULL); |
6fc6879b | 2120 | if (psk) { |
7a12edd1 JM |
2121 | os_memcpy(sm->PMK, psk, psk_len); |
2122 | sm->pmk_len = psk_len; | |
4ec1fd8e | 2123 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b JM |
2124 | os_memcpy(sm->xxkey, psk, PMK_LEN); |
2125 | sm->xxkey_len = PMK_LEN; | |
4ec1fd8e | 2126 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b | 2127 | } |
e61fea6b JM |
2128 | #ifdef CONFIG_SAE |
2129 | if (wpa_auth_uses_sae(sm) && sm->pmksa) { | |
2130 | wpa_printf(MSG_DEBUG, "SAE: PMK from PMKSA cache"); | |
2131 | os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len); | |
2132 | sm->pmk_len = sm->pmksa->pmk_len; | |
6fe3f0f7 | 2133 | #ifdef CONFIG_IEEE80211R_AP |
2134 | os_memcpy(sm->xxkey, sm->pmksa->pmk, sm->pmksa->pmk_len); | |
2135 | sm->xxkey_len = sm->pmksa->pmk_len; | |
2136 | #endif /* CONFIG_IEEE80211R_AP */ | |
e61fea6b JM |
2137 | } |
2138 | #endif /* CONFIG_SAE */ | |
6fc6879b JM |
2139 | sm->req_replay_counter_used = 0; |
2140 | } | |
2141 | ||
2142 | ||
2143 | SM_STATE(WPA_PTK, PTKSTART) | |
2144 | { | |
2145 | u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL; | |
2146 | size_t pmkid_len = 0; | |
2147 | ||
2148 | SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk); | |
2149 | sm->PTKRequest = FALSE; | |
2150 | sm->TimeoutEvt = FALSE; | |
f23c5b17 | 2151 | sm->alt_snonce_valid = FALSE; |
bae61562 JM |
2152 | |
2153 | sm->TimeoutCtr++; | |
41f140d3 | 2154 | if (sm->TimeoutCtr > sm->wpa_auth->conf.wpa_pairwise_update_count) { |
bae61562 JM |
2155 | /* No point in sending the EAPOL-Key - we will disconnect |
2156 | * immediately following this. */ | |
2157 | return; | |
2158 | } | |
2159 | ||
6fc6879b JM |
2160 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, |
2161 | "sending 1/4 msg of 4-Way Handshake"); | |
2162 | /* | |
c6e1a9a0 JM |
2163 | * For infrastructure BSS cases, it is better for the AP not to include |
2164 | * the PMKID KDE in EAPOL-Key msg 1/4 since it could be used to initiate | |
2165 | * offline search for the passphrase/PSK without having to be able to | |
2166 | * capture a 4-way handshake from a STA that has access to the network. | |
2167 | * | |
2168 | * For IBSS cases, addition of PMKID KDE could be considered even with | |
2169 | * WPA2-PSK cases that use multiple PSKs, but only if there is a single | |
2170 | * possible PSK for this STA. However, this should not be done unless | |
2171 | * there is support for using that information on the supplicant side. | |
2172 | * The concern about exposing PMKID unnecessarily in infrastructure BSS | |
2173 | * cases would also apply here, but at least in the IBSS case, this | |
2174 | * would cover a potential real use case. | |
6fc6879b JM |
2175 | */ |
2176 | if (sm->wpa == WPA_VERSION_WPA2 && | |
e61fea6b | 2177 | (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) || |
d90f10fa | 2178 | (sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE && sm->pmksa) || |
e61fea6b | 2179 | wpa_key_mgmt_sae(sm->wpa_key_mgmt)) && |
a14896e8 | 2180 | sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN) { |
6fc6879b JM |
2181 | pmkid = buf; |
2182 | pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN; | |
2183 | pmkid[0] = WLAN_EID_VENDOR_SPECIFIC; | |
2184 | pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN; | |
2185 | RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID); | |
929a2ea5 | 2186 | if (sm->pmksa) { |
9d94e4bb JM |
2187 | wpa_hexdump(MSG_DEBUG, |
2188 | "RSN: Message 1/4 PMKID from PMKSA entry", | |
2189 | sm->pmksa->pmkid, PMKID_LEN); | |
6fc6879b JM |
2190 | os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN], |
2191 | sm->pmksa->pmkid, PMKID_LEN); | |
929a2ea5 JM |
2192 | } else if (wpa_key_mgmt_suite_b(sm->wpa_key_mgmt)) { |
2193 | /* No KCK available to derive PMKID */ | |
9d94e4bb JM |
2194 | wpa_printf(MSG_DEBUG, |
2195 | "RSN: No KCK available to derive PMKID for message 1/4"); | |
929a2ea5 | 2196 | pmkid = NULL; |
a40bd06e JM |
2197 | #ifdef CONFIG_FILS |
2198 | } else if (wpa_key_mgmt_fils(sm->wpa_key_mgmt)) { | |
2199 | if (sm->pmkid_set) { | |
2200 | wpa_hexdump(MSG_DEBUG, | |
2201 | "RSN: Message 1/4 PMKID from FILS/ERP", | |
2202 | sm->pmkid, PMKID_LEN); | |
2203 | os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN], | |
2204 | sm->pmkid, PMKID_LEN); | |
2205 | } else { | |
2206 | /* No PMKID available */ | |
2207 | wpa_printf(MSG_DEBUG, | |
2208 | "RSN: No FILS/ERP PMKID available for message 1/4"); | |
2209 | pmkid = NULL; | |
2210 | } | |
2211 | #endif /* CONFIG_FILS */ | |
fb1dee22 JM |
2212 | #ifdef CONFIG_IEEE80211R_AP |
2213 | } else if (wpa_key_mgmt_ft(sm->wpa_key_mgmt) && | |
2214 | sm->ft_completed) { | |
2215 | wpa_printf(MSG_DEBUG, | |
2216 | "FT: No PMKID in message 1/4 when using FT protocol"); | |
2217 | pmkid = NULL; | |
fb1dee22 | 2218 | #endif /* CONFIG_IEEE80211R_AP */ |
9d94e4bb JM |
2219 | #ifdef CONFIG_SAE |
2220 | } else if (wpa_key_mgmt_sae(sm->wpa_key_mgmt)) { | |
2221 | if (sm->pmkid_set) { | |
2222 | wpa_hexdump(MSG_DEBUG, | |
2223 | "RSN: Message 1/4 PMKID from SAE", | |
2224 | sm->pmkid, PMKID_LEN); | |
2225 | os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN], | |
2226 | sm->pmkid, PMKID_LEN); | |
2227 | } else { | |
2228 | /* No PMKID available */ | |
2229 | wpa_printf(MSG_DEBUG, | |
2230 | "RSN: No SAE PMKID available for message 1/4"); | |
2231 | pmkid = NULL; | |
2232 | } | |
2233 | #endif /* CONFIG_SAE */ | |
929a2ea5 | 2234 | } else { |
6fc6879b JM |
2235 | /* |
2236 | * Calculate PMKID since no PMKSA cache entry was | |
2237 | * available with pre-calculated PMKID. | |
2238 | */ | |
207976f0 | 2239 | rsn_pmkid(sm->PMK, sm->pmk_len, sm->wpa_auth->addr, |
56586197 | 2240 | sm->addr, &pmkid[2 + RSN_SELECTOR_LEN], |
41b81914 | 2241 | sm->wpa_key_mgmt); |
9d94e4bb JM |
2242 | wpa_hexdump(MSG_DEBUG, |
2243 | "RSN: Message 1/4 PMKID derived from PMK", | |
2244 | &pmkid[2 + RSN_SELECTOR_LEN], PMKID_LEN); | |
6fc6879b JM |
2245 | } |
2246 | } | |
307cfc32 MK |
2247 | if (!pmkid) |
2248 | pmkid_len = 0; | |
6fc6879b JM |
2249 | wpa_send_eapol(sm->wpa_auth, sm, |
2250 | WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL, | |
2251 | sm->ANonce, pmkid, pmkid_len, 0, 0); | |
6fc6879b JM |
2252 | } |
2253 | ||
2254 | ||
f23c5b17 | 2255 | static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce, |
207976f0 | 2256 | const u8 *pmk, unsigned int pmk_len, |
65a44e84 | 2257 | struct wpa_ptk *ptk, int force_sha256) |
6fc6879b | 2258 | { |
10ec6a5f JM |
2259 | const u8 *z = NULL; |
2260 | size_t z_len = 0; | |
65a44e84 | 2261 | int akmp; |
10ec6a5f | 2262 | |
4ec1fd8e | 2263 | #ifdef CONFIG_IEEE80211R_AP |
b583ed38 JM |
2264 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { |
2265 | if (sm->ft_completed) { | |
2266 | u8 ptk_name[WPA_PMK_NAME_LEN]; | |
2267 | ||
2268 | return wpa_pmk_r1_to_ptk(sm->pmk_r1, sm->pmk_r1_len, | |
2269 | sm->SNonce, sm->ANonce, | |
2270 | sm->addr, sm->wpa_auth->addr, | |
2271 | sm->pmk_r1_name, | |
2272 | ptk, ptk_name, | |
2273 | sm->wpa_key_mgmt, | |
2274 | sm->pairwise); | |
2275 | } | |
267c366f | 2276 | return wpa_auth_derive_ptk_ft(sm, ptk); |
b583ed38 | 2277 | } |
4ec1fd8e | 2278 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b | 2279 | |
10ec6a5f JM |
2280 | #ifdef CONFIG_DPP2 |
2281 | if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP && sm->dpp_z) { | |
2282 | z = wpabuf_head(sm->dpp_z); | |
2283 | z_len = wpabuf_len(sm->dpp_z); | |
2284 | } | |
2285 | #endif /* CONFIG_DPP2 */ | |
2286 | ||
65a44e84 JM |
2287 | akmp = sm->wpa_key_mgmt; |
2288 | if (force_sha256) | |
2289 | akmp = WPA_KEY_MGMT_PSK_SHA256; | |
207976f0 | 2290 | return wpa_pmk_to_ptk(pmk, pmk_len, "Pairwise key expansion", |
98cd3d1c | 2291 | sm->wpa_auth->addr, sm->addr, sm->ANonce, snonce, |
65a44e84 | 2292 | ptk, akmp, sm->pairwise, z, z_len); |
6fc6879b JM |
2293 | } |
2294 | ||
2295 | ||
3b5b7aa8 | 2296 | #ifdef CONFIG_FILS |
c4fd6d8a JM |
2297 | |
2298 | int fils_auth_pmk_to_ptk(struct wpa_state_machine *sm, const u8 *pmk, | |
80ddf5d9 | 2299 | size_t pmk_len, const u8 *snonce, const u8 *anonce, |
4cada9dc | 2300 | const u8 *dhss, size_t dhss_len, |
80ddf5d9 | 2301 | struct wpabuf *g_sta, struct wpabuf *g_ap) |
c4fd6d8a JM |
2302 | { |
2303 | u8 ick[FILS_ICK_MAX_LEN]; | |
2304 | size_t ick_len; | |
2305 | int res; | |
8fed47e0 JM |
2306 | u8 fils_ft[FILS_FT_MAX_LEN]; |
2307 | size_t fils_ft_len = 0; | |
c4fd6d8a JM |
2308 | |
2309 | res = fils_pmk_to_ptk(pmk, pmk_len, sm->addr, sm->wpa_auth->addr, | |
4cada9dc JM |
2310 | snonce, anonce, dhss, dhss_len, |
2311 | &sm->PTK, ick, &ick_len, | |
8fed47e0 JM |
2312 | sm->wpa_key_mgmt, sm->pairwise, |
2313 | fils_ft, &fils_ft_len); | |
c4fd6d8a JM |
2314 | if (res < 0) |
2315 | return res; | |
2316 | sm->PTK_valid = TRUE; | |
2f1357fb | 2317 | sm->tk_already_set = FALSE; |
c4fd6d8a | 2318 | |
8fed47e0 JM |
2319 | #ifdef CONFIG_IEEE80211R_AP |
2320 | if (fils_ft_len) { | |
2321 | struct wpa_authenticator *wpa_auth = sm->wpa_auth; | |
2322 | struct wpa_auth_config *conf = &wpa_auth->conf; | |
994eac7e JM |
2323 | u8 pmk_r0[PMK_LEN_MAX], pmk_r0_name[WPA_PMK_NAME_LEN]; |
2324 | int use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt); | |
2325 | size_t pmk_r0_len = use_sha384 ? SHA384_MAC_LEN : PMK_LEN; | |
8fed47e0 JM |
2326 | |
2327 | if (wpa_derive_pmk_r0(fils_ft, fils_ft_len, | |
2328 | conf->ssid, conf->ssid_len, | |
2329 | conf->mobility_domain, | |
2330 | conf->r0_key_holder, | |
2331 | conf->r0_key_holder_len, | |
994eac7e JM |
2332 | sm->addr, pmk_r0, pmk_r0_name, |
2333 | use_sha384) < 0) | |
8fed47e0 JM |
2334 | return -1; |
2335 | ||
994eac7e JM |
2336 | wpa_hexdump_key(MSG_DEBUG, "FILS+FT: PMK-R0", |
2337 | pmk_r0, pmk_r0_len); | |
8fed47e0 JM |
2338 | wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR0Name", |
2339 | pmk_r0_name, WPA_PMK_NAME_LEN); | |
89dea17e | 2340 | wpa_ft_store_pmk_fils(sm, pmk_r0, pmk_r0_name); |
31bc66e4 | 2341 | forced_memzero(fils_ft, sizeof(fils_ft)); |
36536639 JM |
2342 | |
2343 | res = wpa_derive_pmk_r1_name(pmk_r0_name, conf->r1_key_holder, | |
2344 | sm->addr, sm->pmk_r1_name, | |
2345 | use_sha384); | |
31bc66e4 | 2346 | forced_memzero(pmk_r0, PMK_LEN_MAX); |
36536639 JM |
2347 | if (res < 0) |
2348 | return -1; | |
2349 | wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR1Name", sm->pmk_r1_name, | |
2350 | WPA_PMK_NAME_LEN); | |
2351 | sm->pmk_r1_name_valid = 1; | |
8fed47e0 JM |
2352 | } |
2353 | #endif /* CONFIG_IEEE80211R_AP */ | |
2354 | ||
c4fd6d8a JM |
2355 | res = fils_key_auth_sk(ick, ick_len, snonce, anonce, |
2356 | sm->addr, sm->wpa_auth->addr, | |
80ddf5d9 JM |
2357 | g_sta ? wpabuf_head(g_sta) : NULL, |
2358 | g_sta ? wpabuf_len(g_sta) : 0, | |
2359 | g_ap ? wpabuf_head(g_ap) : NULL, | |
2360 | g_ap ? wpabuf_len(g_ap) : 0, | |
c4fd6d8a JM |
2361 | sm->wpa_key_mgmt, sm->fils_key_auth_sta, |
2362 | sm->fils_key_auth_ap, | |
2363 | &sm->fils_key_auth_len); | |
31bc66e4 | 2364 | forced_memzero(ick, sizeof(ick)); |
78815f3d JM |
2365 | |
2366 | /* Store nonces for (Re)Association Request/Response frame processing */ | |
2367 | os_memcpy(sm->SNonce, snonce, FILS_NONCE_LEN); | |
2368 | os_memcpy(sm->ANonce, anonce, FILS_NONCE_LEN); | |
2369 | ||
c4fd6d8a JM |
2370 | return res; |
2371 | } | |
2372 | ||
2373 | ||
3b5b7aa8 | 2374 | static int wpa_aead_decrypt(struct wpa_state_machine *sm, struct wpa_ptk *ptk, |
75c8563e | 2375 | u8 *buf, size_t buf_len, u16 *_key_data_len) |
3b5b7aa8 JM |
2376 | { |
2377 | struct ieee802_1x_hdr *hdr; | |
2378 | struct wpa_eapol_key *key; | |
2379 | u8 *pos; | |
2380 | u16 key_data_len; | |
2381 | u8 *tmp; | |
2382 | const u8 *aad[1]; | |
2383 | size_t aad_len[1]; | |
2384 | ||
75c8563e | 2385 | hdr = (struct ieee802_1x_hdr *) buf; |
3b5b7aa8 JM |
2386 | key = (struct wpa_eapol_key *) (hdr + 1); |
2387 | pos = (u8 *) (key + 1); | |
2388 | key_data_len = WPA_GET_BE16(pos); | |
2389 | if (key_data_len < AES_BLOCK_SIZE || | |
2390 | key_data_len > buf_len - sizeof(*hdr) - sizeof(*key) - 2) { | |
2391 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO, | |
2392 | "No room for AES-SIV data in the frame"); | |
2393 | return -1; | |
2394 | } | |
2395 | pos += 2; /* Pointing at the Encrypted Key Data field */ | |
2396 | ||
2397 | tmp = os_malloc(key_data_len); | |
2398 | if (!tmp) | |
2399 | return -1; | |
2400 | ||
2401 | /* AES-SIV AAD from EAPOL protocol version field (inclusive) to | |
2402 | * to Key Data (exclusive). */ | |
75c8563e JM |
2403 | aad[0] = buf; |
2404 | aad_len[0] = pos - buf; | |
3b5b7aa8 JM |
2405 | if (aes_siv_decrypt(ptk->kek, ptk->kek_len, pos, key_data_len, |
2406 | 1, aad, aad_len, tmp) < 0) { | |
2407 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO, | |
2408 | "Invalid AES-SIV data in the frame"); | |
2409 | bin_clear_free(tmp, key_data_len); | |
2410 | return -1; | |
2411 | } | |
2412 | ||
2413 | /* AEAD decryption and validation completed successfully */ | |
2414 | key_data_len -= AES_BLOCK_SIZE; | |
2415 | wpa_hexdump_key(MSG_DEBUG, "WPA: Decrypted Key Data", | |
2416 | tmp, key_data_len); | |
2417 | ||
2418 | /* Replace Key Data field with the decrypted version */ | |
2419 | os_memcpy(pos, tmp, key_data_len); | |
2420 | pos -= 2; /* Key Data Length field */ | |
2421 | WPA_PUT_BE16(pos, key_data_len); | |
2422 | bin_clear_free(tmp, key_data_len); | |
2423 | if (_key_data_len) | |
2424 | *_key_data_len = key_data_len; | |
2425 | return 0; | |
2426 | } | |
78815f3d JM |
2427 | |
2428 | ||
087631b9 JM |
2429 | const u8 * wpa_fils_validate_fils_session(struct wpa_state_machine *sm, |
2430 | const u8 *ies, size_t ies_len, | |
2431 | const u8 *fils_session) | |
2432 | { | |
2433 | const u8 *ie, *end; | |
2434 | const u8 *session = NULL; | |
2435 | ||
2436 | if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt)) { | |
2437 | wpa_printf(MSG_DEBUG, | |
2438 | "FILS: Not a FILS AKM - reject association"); | |
2439 | return NULL; | |
2440 | } | |
2441 | ||
2442 | /* Verify Session element */ | |
2443 | ie = ies; | |
2444 | end = ((const u8 *) ie) + ies_len; | |
2445 | while (ie + 1 < end) { | |
2446 | if (ie + 2 + ie[1] > end) | |
2447 | break; | |
2448 | if (ie[0] == WLAN_EID_EXTENSION && | |
2449 | ie[1] >= 1 + FILS_SESSION_LEN && | |
2450 | ie[2] == WLAN_EID_EXT_FILS_SESSION) { | |
2451 | session = ie; | |
2452 | break; | |
2453 | } | |
2454 | ie += 2 + ie[1]; | |
2455 | } | |
2456 | ||
2457 | if (!session) { | |
2458 | wpa_printf(MSG_DEBUG, | |
2459 | "FILS: %s: Could not find FILS Session element in Assoc Req - reject", | |
2460 | __func__); | |
2461 | return NULL; | |
2462 | } | |
2463 | ||
2464 | if (!fils_session) { | |
2465 | wpa_printf(MSG_DEBUG, | |
2466 | "FILS: %s: Could not find FILS Session element in STA entry - reject", | |
2467 | __func__); | |
2468 | return NULL; | |
2469 | } | |
2470 | ||
2471 | if (os_memcmp(fils_session, session + 3, FILS_SESSION_LEN) != 0) { | |
2472 | wpa_printf(MSG_DEBUG, "FILS: Session mismatch"); | |
2473 | wpa_hexdump(MSG_DEBUG, "FILS: Expected FILS Session", | |
2474 | fils_session, FILS_SESSION_LEN); | |
2475 | wpa_hexdump(MSG_DEBUG, "FILS: Received FILS Session", | |
2476 | session + 3, FILS_SESSION_LEN); | |
2477 | return NULL; | |
2478 | } | |
2479 | return session; | |
2480 | } | |
2481 | ||
2482 | ||
bd599353 JM |
2483 | int wpa_fils_validate_key_confirm(struct wpa_state_machine *sm, const u8 *ies, |
2484 | size_t ies_len) | |
2485 | { | |
2486 | struct ieee802_11_elems elems; | |
2487 | ||
2488 | if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) { | |
2489 | wpa_printf(MSG_DEBUG, | |
2490 | "FILS: Failed to parse decrypted elements"); | |
2491 | return -1; | |
2492 | } | |
2493 | ||
8b5ddda5 JM |
2494 | if (!elems.fils_session) { |
2495 | wpa_printf(MSG_DEBUG, "FILS: No FILS Session element"); | |
2496 | return -1; | |
2497 | } | |
2498 | ||
bd599353 JM |
2499 | if (!elems.fils_key_confirm) { |
2500 | wpa_printf(MSG_DEBUG, "FILS: No FILS Key Confirm element"); | |
2501 | return -1; | |
2502 | } | |
2503 | ||
2504 | if (elems.fils_key_confirm_len != sm->fils_key_auth_len) { | |
2505 | wpa_printf(MSG_DEBUG, | |
2506 | "FILS: Unexpected Key-Auth length %d (expected %d)", | |
2507 | elems.fils_key_confirm_len, | |
2508 | (int) sm->fils_key_auth_len); | |
2509 | return -1; | |
2510 | } | |
2511 | ||
2512 | if (os_memcmp(elems.fils_key_confirm, sm->fils_key_auth_sta, | |
2513 | sm->fils_key_auth_len) != 0) { | |
2514 | wpa_printf(MSG_DEBUG, "FILS: Key-Auth mismatch"); | |
2515 | wpa_hexdump(MSG_DEBUG, "FILS: Received Key-Auth", | |
2516 | elems.fils_key_confirm, elems.fils_key_confirm_len); | |
2517 | wpa_hexdump(MSG_DEBUG, "FILS: Expected Key-Auth", | |
2518 | sm->fils_key_auth_sta, sm->fils_key_auth_len); | |
2519 | return -1; | |
2520 | } | |
2521 | ||
2522 | return 0; | |
2523 | } | |
2524 | ||
2525 | ||
78815f3d JM |
2526 | int fils_decrypt_assoc(struct wpa_state_machine *sm, const u8 *fils_session, |
2527 | const struct ieee80211_mgmt *mgmt, size_t frame_len, | |
2528 | u8 *pos, size_t left) | |
2529 | { | |
2530 | u16 fc, stype; | |
2531 | const u8 *end, *ie_start, *ie, *session, *crypt; | |
78815f3d JM |
2532 | const u8 *aad[5]; |
2533 | size_t aad_len[5]; | |
2534 | ||
2535 | if (!sm || !sm->PTK_valid) { | |
2536 | wpa_printf(MSG_DEBUG, | |
2537 | "FILS: No KEK to decrypt Assocication Request frame"); | |
2538 | return -1; | |
2539 | } | |
2540 | ||
2541 | if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt)) { | |
2542 | wpa_printf(MSG_DEBUG, | |
2543 | "FILS: Not a FILS AKM - reject association"); | |
2544 | return -1; | |
2545 | } | |
2546 | ||
2547 | end = ((const u8 *) mgmt) + frame_len; | |
2548 | fc = le_to_host16(mgmt->frame_control); | |
2549 | stype = WLAN_FC_GET_STYPE(fc); | |
2550 | if (stype == WLAN_FC_STYPE_REASSOC_REQ) | |
2551 | ie_start = mgmt->u.reassoc_req.variable; | |
2552 | else | |
2553 | ie_start = mgmt->u.assoc_req.variable; | |
2554 | ie = ie_start; | |
2555 | ||
2556 | /* | |
2557 | * Find FILS Session element which is the last unencrypted element in | |
2558 | * the frame. | |
2559 | */ | |
087631b9 JM |
2560 | session = wpa_fils_validate_fils_session(sm, ie, end - ie, |
2561 | fils_session); | |
78815f3d | 2562 | if (!session) { |
087631b9 | 2563 | wpa_printf(MSG_DEBUG, "FILS: Session validation failed"); |
78815f3d JM |
2564 | return -1; |
2565 | } | |
087631b9 | 2566 | |
78815f3d JM |
2567 | crypt = session + 2 + session[1]; |
2568 | ||
2569 | if (end - crypt < AES_BLOCK_SIZE) { | |
2570 | wpa_printf(MSG_DEBUG, | |
2571 | "FILS: Too short frame to include AES-SIV data"); | |
2572 | return -1; | |
2573 | } | |
2574 | ||
2575 | /* AES-SIV AAD vectors */ | |
2576 | ||
2577 | /* The STA's MAC address */ | |
2578 | aad[0] = mgmt->sa; | |
2579 | aad_len[0] = ETH_ALEN; | |
2580 | /* The AP's BSSID */ | |
2581 | aad[1] = mgmt->da; | |
2582 | aad_len[1] = ETH_ALEN; | |
2583 | /* The STA's nonce */ | |
2584 | aad[2] = sm->SNonce; | |
2585 | aad_len[2] = FILS_NONCE_LEN; | |
2586 | /* The AP's nonce */ | |
2587 | aad[3] = sm->ANonce; | |
2588 | aad_len[3] = FILS_NONCE_LEN; | |
2589 | /* | |
2590 | * The (Re)Association Request frame from the Capability Information | |
2591 | * field to the FILS Session element (both inclusive). | |
2592 | */ | |
2593 | aad[4] = (const u8 *) &mgmt->u.assoc_req.capab_info; | |
d77f3304 | 2594 | aad_len[4] = crypt - aad[4]; |
78815f3d JM |
2595 | |
2596 | if (aes_siv_decrypt(sm->PTK.kek, sm->PTK.kek_len, crypt, end - crypt, | |
d77f3304 | 2597 | 5, aad, aad_len, pos + (crypt - ie_start)) < 0) { |
78815f3d JM |
2598 | wpa_printf(MSG_DEBUG, |
2599 | "FILS: Invalid AES-SIV data in the frame"); | |
2600 | return -1; | |
2601 | } | |
2602 | wpa_hexdump(MSG_DEBUG, "FILS: Decrypted Association Request elements", | |
2603 | pos, left - AES_BLOCK_SIZE); | |
2604 | ||
bd599353 JM |
2605 | if (wpa_fils_validate_key_confirm(sm, pos, left - AES_BLOCK_SIZE) < 0) { |
2606 | wpa_printf(MSG_DEBUG, "FILS: Key Confirm validation failed"); | |
78815f3d JM |
2607 | return -1; |
2608 | } | |
2609 | ||
2610 | return left - AES_BLOCK_SIZE; | |
2611 | } | |
2612 | ||
e73ffa09 JM |
2613 | |
2614 | int fils_encrypt_assoc(struct wpa_state_machine *sm, u8 *buf, | |
91d91abf JM |
2615 | size_t current_len, size_t max_len, |
2616 | const struct wpabuf *hlp) | |
e73ffa09 JM |
2617 | { |
2618 | u8 *end = buf + max_len; | |
2619 | u8 *pos = buf + current_len; | |
2620 | struct ieee80211_mgmt *mgmt; | |
2621 | struct wpabuf *plain; | |
e73ffa09 JM |
2622 | const u8 *aad[5]; |
2623 | size_t aad_len[5]; | |
2624 | ||
2625 | if (!sm || !sm->PTK_valid) | |
2626 | return -1; | |
2627 | ||
2628 | wpa_hexdump(MSG_DEBUG, | |
2629 | "FILS: Association Response frame before FILS processing", | |
2630 | buf, current_len); | |
2631 | ||
2632 | mgmt = (struct ieee80211_mgmt *) buf; | |
2633 | ||
2634 | /* AES-SIV AAD vectors */ | |
2635 | ||
2636 | /* The AP's BSSID */ | |
2637 | aad[0] = mgmt->sa; | |
2638 | aad_len[0] = ETH_ALEN; | |
2639 | /* The STA's MAC address */ | |
2640 | aad[1] = mgmt->da; | |
2641 | aad_len[1] = ETH_ALEN; | |
2642 | /* The AP's nonce */ | |
2643 | aad[2] = sm->ANonce; | |
2644 | aad_len[2] = FILS_NONCE_LEN; | |
2645 | /* The STA's nonce */ | |
2646 | aad[3] = sm->SNonce; | |
2647 | aad_len[3] = FILS_NONCE_LEN; | |
2648 | /* | |
2649 | * The (Re)Association Response frame from the Capability Information | |
2650 | * field (the same offset in both Association and Reassociation | |
2651 | * Response frames) to the FILS Session element (both inclusive). | |
2652 | */ | |
2653 | aad[4] = (const u8 *) &mgmt->u.assoc_resp.capab_info; | |
2654 | aad_len[4] = pos - aad[4]; | |
2655 | ||
2656 | /* The following elements will be encrypted with AES-SIV */ | |
9392859d JM |
2657 | plain = fils_prepare_plainbuf(sm, hlp); |
2658 | if (!plain) { | |
2659 | wpa_printf(MSG_DEBUG, "FILS: Plain buffer prep failed"); | |
2660 | return -1; | |
2661 | } | |
2662 | ||
2663 | if (pos + wpabuf_len(plain) + AES_BLOCK_SIZE > end) { | |
2664 | wpa_printf(MSG_DEBUG, | |
2665 | "FILS: Not enough room for FILS elements"); | |
ce362f88 | 2666 | wpabuf_clear_free(plain); |
9392859d JM |
2667 | return -1; |
2668 | } | |
2669 | ||
2670 | wpa_hexdump_buf_key(MSG_DEBUG, "FILS: Association Response plaintext", | |
2671 | plain); | |
2672 | ||
2673 | if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len, | |
2674 | wpabuf_head(plain), wpabuf_len(plain), | |
2675 | 5, aad, aad_len, pos) < 0) { | |
ce362f88 | 2676 | wpabuf_clear_free(plain); |
9392859d JM |
2677 | return -1; |
2678 | } | |
2679 | ||
2680 | wpa_hexdump(MSG_DEBUG, | |
2681 | "FILS: Encrypted Association Response elements", | |
2682 | pos, AES_BLOCK_SIZE + wpabuf_len(plain)); | |
2683 | current_len += wpabuf_len(plain) + AES_BLOCK_SIZE; | |
ce362f88 | 2684 | wpabuf_clear_free(plain); |
9392859d JM |
2685 | |
2686 | sm->fils_completed = 1; | |
2687 | ||
2688 | return current_len; | |
2689 | } | |
2690 | ||
2691 | ||
2692 | static struct wpabuf * fils_prepare_plainbuf(struct wpa_state_machine *sm, | |
2693 | const struct wpabuf *hlp) | |
2694 | { | |
2695 | struct wpabuf *plain; | |
2696 | u8 *len, *tmp, *tmp2; | |
2697 | u8 hdr[2]; | |
2698 | u8 *gtk, dummy_gtk[32]; | |
2699 | size_t gtk_len; | |
2700 | struct wpa_group *gsm; | |
e73ffa09 | 2701 | |
16889aff | 2702 | plain = wpabuf_alloc(1000 + ieee80211w_kde_len(sm)); |
e73ffa09 | 2703 | if (!plain) |
9392859d | 2704 | return NULL; |
e73ffa09 JM |
2705 | |
2706 | /* TODO: FILS Public Key */ | |
2707 | ||
2708 | /* FILS Key Confirmation */ | |
2709 | wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */ | |
2710 | wpabuf_put_u8(plain, 1 + sm->fils_key_auth_len); /* Length */ | |
2711 | /* Element ID Extension */ | |
2712 | wpabuf_put_u8(plain, WLAN_EID_EXT_FILS_KEY_CONFIRM); | |
2713 | wpabuf_put_data(plain, sm->fils_key_auth_ap, sm->fils_key_auth_len); | |
2714 | ||
91d91abf JM |
2715 | /* FILS HLP Container */ |
2716 | if (hlp) | |
2717 | wpabuf_put_buf(plain, hlp); | |
e73ffa09 JM |
2718 | |
2719 | /* TODO: FILS IP Address Assignment */ | |
2720 | ||
2721 | /* Key Delivery */ | |
2722 | gsm = sm->group; | |
2723 | wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */ | |
2724 | len = wpabuf_put(plain, 1); | |
2725 | wpabuf_put_u8(plain, WLAN_EID_EXT_KEY_DELIVERY); | |
2726 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, | |
2727 | wpabuf_put(plain, WPA_KEY_RSC_LEN)); | |
2728 | /* GTK KDE */ | |
2729 | gtk = gsm->GTK[gsm->GN - 1]; | |
2730 | gtk_len = gsm->GTK_len; | |
8d660a4b JM |
2731 | if (sm->wpa_auth->conf.disable_gtk || |
2732 | sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) { | |
e73ffa09 JM |
2733 | /* |
2734 | * Provide unique random GTK to each STA to prevent use | |
2735 | * of GTK in the BSS. | |
2736 | */ | |
2737 | if (random_get_bytes(dummy_gtk, gtk_len) < 0) { | |
ce362f88 | 2738 | wpabuf_clear_free(plain); |
9392859d | 2739 | return NULL; |
e73ffa09 JM |
2740 | } |
2741 | gtk = dummy_gtk; | |
2742 | } | |
2743 | hdr[0] = gsm->GN & 0x03; | |
2744 | hdr[1] = 0; | |
2745 | tmp = wpabuf_put(plain, 0); | |
2746 | tmp2 = wpa_add_kde(tmp, RSN_KEY_DATA_GROUPKEY, hdr, 2, | |
2747 | gtk, gtk_len); | |
2748 | wpabuf_put(plain, tmp2 - tmp); | |
2749 | ||
16889aff | 2750 | /* IGTK KDE and BIGTK KDE */ |
e73ffa09 JM |
2751 | tmp = wpabuf_put(plain, 0); |
2752 | tmp2 = ieee80211w_kde_add(sm, tmp); | |
2753 | wpabuf_put(plain, tmp2 - tmp); | |
2754 | ||
2755 | *len = (u8 *) wpabuf_put(plain, 0) - len - 1; | |
99621dc1 MV |
2756 | |
2757 | #ifdef CONFIG_OCV | |
2758 | if (wpa_auth_uses_ocv(sm)) { | |
2759 | struct wpa_channel_info ci; | |
2760 | u8 *pos; | |
2761 | ||
2762 | if (wpa_channel_info(sm->wpa_auth, &ci) != 0) { | |
2763 | wpa_printf(MSG_WARNING, | |
2764 | "FILS: Failed to get channel info for OCI element"); | |
ce362f88 | 2765 | wpabuf_clear_free(plain); |
99621dc1 MV |
2766 | return NULL; |
2767 | } | |
2768 | ||
2769 | pos = wpabuf_put(plain, OCV_OCI_EXTENDED_LEN); | |
2770 | if (ocv_insert_extended_oci(&ci, pos) < 0) { | |
ce362f88 | 2771 | wpabuf_clear_free(plain); |
99621dc1 MV |
2772 | return NULL; |
2773 | } | |
2774 | } | |
2775 | #endif /* CONFIG_OCV */ | |
2776 | ||
9392859d | 2777 | return plain; |
e73ffa09 JM |
2778 | } |
2779 | ||
da24c5aa JM |
2780 | |
2781 | int fils_set_tk(struct wpa_state_machine *sm) | |
2782 | { | |
2783 | enum wpa_alg alg; | |
2784 | int klen; | |
2785 | ||
2f1357fb JM |
2786 | if (!sm || !sm->PTK_valid) { |
2787 | wpa_printf(MSG_DEBUG, "FILS: No valid PTK available to set TK"); | |
2788 | return -1; | |
2789 | } | |
2790 | if (sm->tk_already_set) { | |
2791 | wpa_printf(MSG_DEBUG, "FILS: TK already set to the driver"); | |
da24c5aa | 2792 | return -1; |
2f1357fb | 2793 | } |
da24c5aa JM |
2794 | |
2795 | alg = wpa_cipher_to_alg(sm->pairwise); | |
2796 | klen = wpa_cipher_key_len(sm->pairwise); | |
2797 | ||
2798 | wpa_printf(MSG_DEBUG, "FILS: Configure TK to the driver"); | |
2799 | if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0, | |
a919a260 | 2800 | sm->PTK.tk, klen, KEY_FLAG_PAIRWISE_RX_TX)) { |
da24c5aa JM |
2801 | wpa_printf(MSG_DEBUG, "FILS: Failed to set TK to the driver"); |
2802 | return -1; | |
2803 | } | |
2f1357fb | 2804 | sm->tk_already_set = TRUE; |
da24c5aa JM |
2805 | |
2806 | return 0; | |
2807 | } | |
2808 | ||
fa61bff6 JM |
2809 | |
2810 | u8 * hostapd_eid_assoc_fils_session(struct wpa_state_machine *sm, u8 *buf, | |
8b5ddda5 | 2811 | const u8 *fils_session, struct wpabuf *hlp) |
fa61bff6 JM |
2812 | { |
2813 | struct wpabuf *plain; | |
2814 | u8 *pos = buf; | |
2815 | ||
2816 | /* FILS Session */ | |
2817 | *pos++ = WLAN_EID_EXTENSION; /* Element ID */ | |
2818 | *pos++ = 1 + FILS_SESSION_LEN; /* Length */ | |
2819 | *pos++ = WLAN_EID_EXT_FILS_SESSION; /* Element ID Extension */ | |
2820 | os_memcpy(pos, fils_session, FILS_SESSION_LEN); | |
2821 | pos += FILS_SESSION_LEN; | |
2822 | ||
8b5ddda5 | 2823 | plain = fils_prepare_plainbuf(sm, hlp); |
fa61bff6 JM |
2824 | if (!plain) { |
2825 | wpa_printf(MSG_DEBUG, "FILS: Plain buffer prep failed"); | |
2826 | return NULL; | |
2827 | } | |
2828 | ||
2829 | os_memcpy(pos, wpabuf_head(plain), wpabuf_len(plain)); | |
2830 | pos += wpabuf_len(plain); | |
2831 | ||
2832 | wpa_printf(MSG_DEBUG, "%s: plain buf_len: %u", __func__, | |
2833 | (unsigned int) wpabuf_len(plain)); | |
ce362f88 | 2834 | wpabuf_clear_free(plain); |
fa61bff6 JM |
2835 | sm->fils_completed = 1; |
2836 | return pos; | |
2837 | } | |
2838 | ||
3b5b7aa8 JM |
2839 | #endif /* CONFIG_FILS */ |
2840 | ||
2841 | ||
1034f67b MV |
2842 | #ifdef CONFIG_OCV |
2843 | int get_sta_tx_parameters(struct wpa_state_machine *sm, int ap_max_chanwidth, | |
2844 | int ap_seg1_idx, int *bandwidth, int *seg1_idx) | |
2845 | { | |
2846 | struct wpa_authenticator *wpa_auth = sm->wpa_auth; | |
2847 | ||
2848 | if (!wpa_auth->cb->get_sta_tx_params) | |
2849 | return -1; | |
2850 | return wpa_auth->cb->get_sta_tx_params(wpa_auth->cb_ctx, sm->addr, | |
2851 | ap_max_chanwidth, ap_seg1_idx, | |
2852 | bandwidth, seg1_idx); | |
2853 | } | |
2854 | #endif /* CONFIG_OCV */ | |
2855 | ||
2856 | ||
6fc6879b JM |
2857 | SM_STATE(WPA_PTK, PTKCALCNEGOTIATING) |
2858 | { | |
3b5b7aa8 | 2859 | struct wpa_authenticator *wpa_auth = sm->wpa_auth; |
6fc6879b | 2860 | struct wpa_ptk PTK; |
2c502460 | 2861 | int ok = 0, psk_found = 0; |
6fc6879b | 2862 | const u8 *pmk = NULL; |
7a12edd1 | 2863 | size_t pmk_len; |
3b5b7aa8 JM |
2864 | int ft; |
2865 | const u8 *eapol_key_ie, *key_data, *mic; | |
2866 | u16 key_data_length; | |
2867 | size_t mic_len, eapol_key_ie_len; | |
2868 | struct ieee802_1x_hdr *hdr; | |
2869 | struct wpa_eapol_key *key; | |
2870 | struct wpa_eapol_ie_parse kde; | |
bb05d036 | 2871 | int vlan_id = 0; |
65a44e84 | 2872 | int owe_ptk_workaround = !!wpa_auth->conf.owe_ptk_workaround; |
6fc6879b JM |
2873 | |
2874 | SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk); | |
2875 | sm->EAPOLKeyReceived = FALSE; | |
68921e24 | 2876 | sm->update_snonce = FALSE; |
b729fd8d | 2877 | os_memset(&PTK, 0, sizeof(PTK)); |
6fc6879b | 2878 | |
567da5bb | 2879 | mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len); |
3b5b7aa8 | 2880 | |
6fc6879b JM |
2881 | /* WPA with IEEE 802.1X: use the derived PMK from EAP |
2882 | * WPA-PSK: iterate through possible PSKs and select the one matching | |
2883 | * the packet */ | |
2884 | for (;;) { | |
e61fea6b JM |
2885 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) && |
2886 | !wpa_key_mgmt_sae(sm->wpa_key_mgmt)) { | |
759fd76b | 2887 | pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, |
dbfa691d JM |
2888 | sm->p2p_dev_addr, pmk, &pmk_len, |
2889 | &vlan_id); | |
6fc6879b JM |
2890 | if (pmk == NULL) |
2891 | break; | |
2c502460 | 2892 | psk_found = 1; |
f9854c18 MK |
2893 | #ifdef CONFIG_IEEE80211R_AP |
2894 | if (wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt)) { | |
2895 | os_memcpy(sm->xxkey, pmk, pmk_len); | |
2896 | sm->xxkey_len = pmk_len; | |
2897 | } | |
2898 | #endif /* CONFIG_IEEE80211R_AP */ | |
207976f0 | 2899 | } else { |
6fc6879b | 2900 | pmk = sm->PMK; |
207976f0 JM |
2901 | pmk_len = sm->pmk_len; |
2902 | } | |
6fc6879b | 2903 | |
a40bd06e JM |
2904 | if ((!pmk || !pmk_len) && sm->pmksa) { |
2905 | wpa_printf(MSG_DEBUG, "WPA: Use PMK from PMKSA cache"); | |
2906 | pmk = sm->pmksa->pmk; | |
2907 | pmk_len = sm->pmksa->pmk_len; | |
2908 | } | |
2909 | ||
65a44e84 JM |
2910 | if (wpa_derive_ptk(sm, sm->SNonce, pmk, pmk_len, &PTK, |
2911 | owe_ptk_workaround == 2) < 0) | |
364c064a | 2912 | break; |
6fc6879b | 2913 | |
3b5b7aa8 | 2914 | if (mic_len && |
567da5bb | 2915 | wpa_verify_key_mic(sm->wpa_key_mgmt, pmk_len, &PTK, |
929a2ea5 | 2916 | sm->last_rx_eapol_key, |
6fc6879b | 2917 | sm->last_rx_eapol_key_len) == 0) { |
08dc8efd JM |
2918 | if (sm->PMK != pmk) { |
2919 | os_memcpy(sm->PMK, pmk, pmk_len); | |
2920 | sm->pmk_len = pmk_len; | |
2921 | } | |
6fc6879b JM |
2922 | ok = 1; |
2923 | break; | |
2924 | } | |
2925 | ||
3b5b7aa8 | 2926 | #ifdef CONFIG_FILS |
75c8563e JM |
2927 | if (!mic_len && |
2928 | wpa_aead_decrypt(sm, &PTK, sm->last_rx_eapol_key, | |
2929 | sm->last_rx_eapol_key_len, NULL) == 0) { | |
3b5b7aa8 JM |
2930 | ok = 1; |
2931 | break; | |
2932 | } | |
2933 | #endif /* CONFIG_FILS */ | |
2934 | ||
65a44e84 JM |
2935 | #ifdef CONFIG_OWE |
2936 | if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE && pmk_len > 32 && | |
2937 | owe_ptk_workaround == 1) { | |
2938 | wpa_printf(MSG_DEBUG, | |
2939 | "OWE: Try PTK derivation workaround with SHA256"); | |
2940 | owe_ptk_workaround = 2; | |
2941 | continue; | |
2942 | } | |
2943 | #endif /* CONFIG_OWE */ | |
2944 | ||
f5e0a332 JM |
2945 | if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) || |
2946 | wpa_key_mgmt_sae(sm->wpa_key_mgmt)) | |
6fc6879b JM |
2947 | break; |
2948 | } | |
2949 | ||
2950 | if (!ok) { | |
2951 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
2952 | "invalid MIC in msg 2/4 of 4-Way Handshake"); | |
2c502460 JM |
2953 | if (psk_found) |
2954 | wpa_auth_psk_failure_report(sm->wpa_auth, sm->addr); | |
6fc6879b JM |
2955 | return; |
2956 | } | |
2957 | ||
3b5b7aa8 JM |
2958 | /* |
2959 | * Note: last_rx_eapol_key length fields have already been validated in | |
2960 | * wpa_receive(). | |
2961 | */ | |
2962 | hdr = (struct ieee802_1x_hdr *) sm->last_rx_eapol_key; | |
2963 | key = (struct wpa_eapol_key *) (hdr + 1); | |
2964 | mic = (u8 *) (key + 1); | |
2965 | key_data = mic + mic_len + 2; | |
2966 | key_data_length = WPA_GET_BE16(mic + mic_len); | |
2967 | if (key_data_length > sm->last_rx_eapol_key_len - sizeof(*hdr) - | |
2968 | sizeof(*key) - mic_len - 2) | |
2969 | return; | |
2970 | ||
2971 | if (wpa_parse_kde_ies(key_data, key_data_length, &kde) < 0) { | |
2972 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
2973 | "received EAPOL-Key msg 2/4 with invalid Key Data contents"); | |
2974 | return; | |
2975 | } | |
2976 | if (kde.rsn_ie) { | |
2977 | eapol_key_ie = kde.rsn_ie; | |
2978 | eapol_key_ie_len = kde.rsn_ie_len; | |
2979 | } else if (kde.osen) { | |
2980 | eapol_key_ie = kde.osen; | |
2981 | eapol_key_ie_len = kde.osen_len; | |
2982 | } else { | |
2983 | eapol_key_ie = kde.wpa_ie; | |
2984 | eapol_key_ie_len = kde.wpa_ie_len; | |
2985 | } | |
2986 | ft = sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt); | |
2987 | if (sm->wpa_ie == NULL || | |
2988 | wpa_compare_rsn_ie(ft, sm->wpa_ie, sm->wpa_ie_len, | |
2989 | eapol_key_ie, eapol_key_ie_len)) { | |
2990 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
2991 | "WPA IE from (Re)AssocReq did not match with msg 2/4"); | |
2992 | if (sm->wpa_ie) { | |
2993 | wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq", | |
2994 | sm->wpa_ie, sm->wpa_ie_len); | |
2995 | } | |
2996 | wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4", | |
2997 | eapol_key_ie, eapol_key_ie_len); | |
2998 | /* MLME-DEAUTHENTICATE.request */ | |
567da5bb JM |
2999 | wpa_sta_disconnect(wpa_auth, sm->addr, |
3000 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
3b5b7aa8 | 3001 | return; |
74866f53 JM |
3002 | } |
3003 | if ((!sm->rsnxe && kde.rsnxe) || | |
3004 | (sm->rsnxe && !kde.rsnxe) || | |
3005 | (sm->rsnxe && kde.rsnxe && | |
3006 | (sm->rsnxe_len != kde.rsnxe_len || | |
3007 | os_memcmp(sm->rsnxe, kde.rsnxe, sm->rsnxe_len) != 0))) { | |
3008 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
3009 | "RSNXE from (Re)AssocReq did not match the one in EAPOL-Key msg 2/4"); | |
3010 | wpa_hexdump(MSG_DEBUG, "RSNXE in AssocReq", | |
3011 | sm->rsnxe, sm->rsnxe_len); | |
3012 | wpa_hexdump(MSG_DEBUG, "RSNXE in EAPOL-Key msg 2/4", | |
3013 | kde.rsnxe, kde.rsnxe_len); | |
3014 | /* MLME-DEAUTHENTICATE.request */ | |
3015 | wpa_sta_disconnect(wpa_auth, sm->addr, | |
3016 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
3017 | return; | |
3b5b7aa8 | 3018 | } |
aed61c4e MV |
3019 | #ifdef CONFIG_OCV |
3020 | if (wpa_auth_uses_ocv(sm)) { | |
3021 | struct wpa_channel_info ci; | |
3022 | int tx_chanwidth; | |
3023 | int tx_seg1_idx; | |
3024 | ||
3025 | if (wpa_channel_info(wpa_auth, &ci) != 0) { | |
3026 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
3027 | "Failed to get channel info to validate received OCI in EAPOL-Key 2/4"); | |
3028 | return; | |
3029 | } | |
3030 | ||
3031 | if (get_sta_tx_parameters(sm, | |
3032 | channel_width_to_int(ci.chanwidth), | |
3033 | ci.seg1_idx, &tx_chanwidth, | |
3034 | &tx_seg1_idx) < 0) | |
3035 | return; | |
3036 | ||
3037 | if (ocv_verify_tx_params(kde.oci, kde.oci_len, &ci, | |
3038 | tx_chanwidth, tx_seg1_idx) != 0) { | |
3039 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
3040 | ocv_errorstr); | |
3041 | return; | |
3042 | } | |
3043 | } | |
3044 | #endif /* CONFIG_OCV */ | |
4ec1fd8e | 3045 | #ifdef CONFIG_IEEE80211R_AP |
3b5b7aa8 | 3046 | if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) { |
567da5bb JM |
3047 | wpa_sta_disconnect(wpa_auth, sm->addr, |
3048 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
3b5b7aa8 JM |
3049 | return; |
3050 | } | |
4ec1fd8e | 3051 | #endif /* CONFIG_IEEE80211R_AP */ |
3b5b7aa8 JM |
3052 | #ifdef CONFIG_P2P |
3053 | if (kde.ip_addr_req && kde.ip_addr_req[0] && | |
3054 | wpa_auth->ip_pool && WPA_GET_BE32(sm->ip_addr) == 0) { | |
3055 | int idx; | |
3056 | wpa_printf(MSG_DEBUG, | |
3057 | "P2P: IP address requested in EAPOL-Key exchange"); | |
3058 | idx = bitfield_get_first_zero(wpa_auth->ip_pool); | |
3059 | if (idx >= 0) { | |
3060 | u32 start = WPA_GET_BE32(wpa_auth->conf.ip_addr_start); | |
3061 | bitfield_set(wpa_auth->ip_pool, idx); | |
3062 | WPA_PUT_BE32(sm->ip_addr, start + idx); | |
3063 | wpa_printf(MSG_DEBUG, | |
3064 | "P2P: Assigned IP address %u.%u.%u.%u to " | |
3065 | MACSTR, sm->ip_addr[0], sm->ip_addr[1], | |
3066 | sm->ip_addr[2], sm->ip_addr[3], | |
3067 | MAC2STR(sm->addr)); | |
3068 | } | |
3069 | } | |
3070 | #endif /* CONFIG_P2P */ | |
3071 | ||
4ec1fd8e | 3072 | #ifdef CONFIG_IEEE80211R_AP |
26e23750 JM |
3073 | if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { |
3074 | /* | |
3075 | * Verify that PMKR1Name from EAPOL-Key message 2/4 matches | |
3076 | * with the value we derived. | |
3077 | */ | |
870834a1 JM |
3078 | if (os_memcmp_const(sm->sup_pmk_r1_name, sm->pmk_r1_name, |
3079 | WPA_PMK_NAME_LEN) != 0) { | |
26e23750 JM |
3080 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, |
3081 | "PMKR1Name mismatch in FT 4-way " | |
3082 | "handshake"); | |
3083 | wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from " | |
3084 | "Supplicant", | |
3085 | sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN); | |
3086 | wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name", | |
3087 | sm->pmk_r1_name, WPA_PMK_NAME_LEN); | |
3088 | return; | |
3089 | } | |
3090 | } | |
4ec1fd8e | 3091 | #endif /* CONFIG_IEEE80211R_AP */ |
26e23750 | 3092 | |
dbfa691d JM |
3093 | if (vlan_id && wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) && |
3094 | wpa_auth_update_vlan(wpa_auth, sm->addr, vlan_id) < 0) { | |
3095 | wpa_sta_disconnect(wpa_auth, sm->addr, | |
3096 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
3097 | return; | |
3098 | } | |
3099 | ||
e4bf4db9 | 3100 | sm->pending_1_of_4_timeout = 0; |
6fc6879b JM |
3101 | eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm); |
3102 | ||
56586197 | 3103 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) { |
6fc6879b JM |
3104 | /* PSK may have changed from the previous choice, so update |
3105 | * state machine data based on whatever PSK was selected here. | |
3106 | */ | |
3107 | os_memcpy(sm->PMK, pmk, PMK_LEN); | |
207976f0 | 3108 | sm->pmk_len = PMK_LEN; |
6fc6879b JM |
3109 | } |
3110 | ||
3111 | sm->MICVerified = TRUE; | |
3112 | ||
3113 | os_memcpy(&sm->PTK, &PTK, sizeof(PTK)); | |
31bc66e4 | 3114 | forced_memzero(&PTK, sizeof(PTK)); |
6fc6879b JM |
3115 | sm->PTK_valid = TRUE; |
3116 | } | |
3117 | ||
3118 | ||
3119 | SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2) | |
3120 | { | |
3121 | SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk); | |
3122 | sm->TimeoutCtr = 0; | |
3123 | } | |
3124 | ||
3125 | ||
6fc6879b JM |
3126 | static int ieee80211w_kde_len(struct wpa_state_machine *sm) |
3127 | { | |
16889aff JM |
3128 | size_t len = 0; |
3129 | ||
6fc6879b | 3130 | if (sm->mgmt_frame_prot) { |
16889aff JM |
3131 | len += 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN; |
3132 | len += wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher); | |
3133 | } | |
3134 | if (sm->mgmt_frame_prot && sm->wpa_auth->conf.beacon_prot) { | |
3135 | len += 2 + RSN_SELECTOR_LEN + WPA_BIGTK_KDE_PREFIX_LEN; | |
3136 | len += wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher); | |
6fc6879b JM |
3137 | } |
3138 | ||
16889aff | 3139 | return len; |
6fc6879b JM |
3140 | } |
3141 | ||
3142 | ||
3143 | static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos) | |
3144 | { | |
3145 | struct wpa_igtk_kde igtk; | |
16889aff | 3146 | struct wpa_bigtk_kde bigtk; |
6fc6879b | 3147 | struct wpa_group *gsm = sm->group; |
03610ad2 | 3148 | u8 rsc[WPA_KEY_RSC_LEN]; |
8dd9f9cd | 3149 | size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher); |
6fc6879b JM |
3150 | |
3151 | if (!sm->mgmt_frame_prot) | |
3152 | return pos; | |
3153 | ||
3154 | igtk.keyid[0] = gsm->GN_igtk; | |
3155 | igtk.keyid[1] = 0; | |
7b1080da | 3156 | if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE || |
03610ad2 | 3157 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, rsc) < 0) |
6fc6879b | 3158 | os_memset(igtk.pn, 0, sizeof(igtk.pn)); |
03610ad2 JM |
3159 | else |
3160 | os_memcpy(igtk.pn, rsc, sizeof(igtk.pn)); | |
8dd9f9cd | 3161 | os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], len); |
8d660a4b JM |
3162 | if (sm->wpa_auth->conf.disable_gtk || |
3163 | sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) { | |
83421850 JM |
3164 | /* |
3165 | * Provide unique random IGTK to each STA to prevent use of | |
3166 | * IGTK in the BSS. | |
3167 | */ | |
8dd9f9cd | 3168 | if (random_get_bytes(igtk.igtk, len) < 0) |
83421850 JM |
3169 | return pos; |
3170 | } | |
6fc6879b | 3171 | pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK, |
8dd9f9cd JM |
3172 | (const u8 *) &igtk, WPA_IGTK_KDE_PREFIX_LEN + len, |
3173 | NULL, 0); | |
6fc6879b | 3174 | |
16889aff JM |
3175 | if (!sm->wpa_auth->conf.beacon_prot) |
3176 | return pos; | |
3177 | ||
3178 | bigtk.keyid[0] = gsm->GN_bigtk; | |
3179 | bigtk.keyid[1] = 0; | |
3180 | if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE || | |
3181 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_bigtk, rsc) < 0) | |
3182 | os_memset(bigtk.pn, 0, sizeof(bigtk.pn)); | |
3183 | else | |
3184 | os_memcpy(bigtk.pn, rsc, sizeof(bigtk.pn)); | |
3185 | os_memcpy(bigtk.bigtk, gsm->BIGTK[gsm->GN_bigtk - 6], len); | |
3186 | pos = wpa_add_kde(pos, RSN_KEY_DATA_BIGTK, | |
3187 | (const u8 *) &bigtk, WPA_BIGTK_KDE_PREFIX_LEN + len, | |
3188 | NULL, 0); | |
3189 | ||
6fc6879b JM |
3190 | return pos; |
3191 | } | |
3192 | ||
6fc6879b | 3193 | |
17c2559c MV |
3194 | static int ocv_oci_len(struct wpa_state_machine *sm) |
3195 | { | |
3196 | #ifdef CONFIG_OCV | |
3197 | if (wpa_auth_uses_ocv(sm)) | |
3198 | return OCV_OCI_KDE_LEN; | |
3199 | #endif /* CONFIG_OCV */ | |
3200 | return 0; | |
3201 | } | |
3202 | ||
3203 | static int ocv_oci_add(struct wpa_state_machine *sm, u8 **argpos) | |
3204 | { | |
3205 | #ifdef CONFIG_OCV | |
3206 | struct wpa_channel_info ci; | |
3207 | ||
3208 | if (!wpa_auth_uses_ocv(sm)) | |
3209 | return 0; | |
3210 | ||
3211 | if (wpa_channel_info(sm->wpa_auth, &ci) != 0) { | |
3212 | wpa_printf(MSG_WARNING, | |
3213 | "Failed to get channel info for OCI element"); | |
3214 | return -1; | |
3215 | } | |
3216 | ||
3217 | return ocv_insert_oci_kde(&ci, argpos); | |
3218 | #else /* CONFIG_OCV */ | |
3219 | return 0; | |
3220 | #endif /* CONFIG_OCV */ | |
3221 | } | |
3222 | ||
3223 | ||
6fc6879b JM |
3224 | SM_STATE(WPA_PTK, PTKINITNEGOTIATING) |
3225 | { | |
f2c4b44b | 3226 | u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde = NULL, *pos, dummy_gtk[32]; |
6fc6879b JM |
3227 | size_t gtk_len, kde_len; |
3228 | struct wpa_group *gsm = sm->group; | |
3229 | u8 *wpa_ie; | |
7a4b01c8 | 3230 | int wpa_ie_len, secure, gtkidx, encr = 0; |
f2c4b44b | 3231 | u8 *wpa_ie_buf = NULL; |
6fc6879b JM |
3232 | |
3233 | SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk); | |
3234 | sm->TimeoutEvt = FALSE; | |
bae61562 JM |
3235 | |
3236 | sm->TimeoutCtr++; | |
6f234c1e JM |
3237 | if (sm->wpa_auth->conf.wpa_disable_eapol_key_retries && |
3238 | sm->TimeoutCtr > 1) { | |
3239 | /* Do not allow retransmission of EAPOL-Key msg 3/4 */ | |
3240 | return; | |
3241 | } | |
41f140d3 | 3242 | if (sm->TimeoutCtr > sm->wpa_auth->conf.wpa_pairwise_update_count) { |
bae61562 JM |
3243 | /* No point in sending the EAPOL-Key - we will disconnect |
3244 | * immediately following this. */ | |
3245 | return; | |
3246 | } | |
3247 | ||
86dfabb8 | 3248 | /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE], |
16889aff | 3249 | GTK[GN], IGTK, [BIGTK], [FTIE], [TIE * 2]) |
6fc6879b JM |
3250 | */ |
3251 | os_memset(rsc, 0, WPA_KEY_RSC_LEN); | |
3252 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc); | |
86dfabb8 | 3253 | /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */ |
6fc6879b JM |
3254 | wpa_ie = sm->wpa_auth->wpa_ie; |
3255 | wpa_ie_len = sm->wpa_auth->wpa_ie_len; | |
3256 | if (sm->wpa == WPA_VERSION_WPA && | |
3257 | (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) && | |
3258 | wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) { | |
774d4145 | 3259 | /* WPA-only STA, remove RSN IE and possible MDIE */ |
6fc6879b | 3260 | wpa_ie = wpa_ie + wpa_ie[1] + 2; |
774d4145 JM |
3261 | if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN) |
3262 | wpa_ie = wpa_ie + wpa_ie[1] + 2; | |
6fc6879b JM |
3263 | wpa_ie_len = wpa_ie[1] + 2; |
3264 | } | |
f2c4b44b JM |
3265 | #ifdef CONFIG_TESTING_OPTIONS |
3266 | if (sm->wpa_auth->conf.rsnxe_override_eapol_len) { | |
3267 | u8 *obuf = sm->wpa_auth->conf.rsnxe_override_eapol; | |
3268 | size_t olen = sm->wpa_auth->conf.rsnxe_override_eapol_len; | |
3269 | const u8 *rsnxe; | |
3270 | ||
3271 | wpa_hexdump(MSG_DEBUG, | |
3272 | "TESTING: wpa_ie before RSNXE EAPOL override", | |
3273 | wpa_ie, wpa_ie_len); | |
3274 | wpa_ie_buf = os_malloc(wpa_ie_len + olen); | |
3275 | if (!wpa_ie_buf) | |
3276 | return; | |
3277 | os_memcpy(wpa_ie_buf, wpa_ie, wpa_ie_len); | |
3278 | wpa_ie = wpa_ie_buf; | |
3279 | rsnxe = get_ie(wpa_ie, wpa_ie_len, WLAN_EID_RSNX); | |
3280 | if (rsnxe) { | |
3281 | u8 rsnxe_len = 2 + rsnxe[1]; | |
3282 | ||
3283 | os_memmove((void *) rsnxe, rsnxe + rsnxe_len, | |
3284 | wpa_ie_len - (rsnxe - wpa_ie) - rsnxe_len); | |
3285 | wpa_ie_len -= rsnxe_len; | |
3286 | } | |
3287 | os_memcpy(wpa_ie + wpa_ie_len, obuf, olen); | |
3288 | wpa_ie_len += olen; | |
3289 | wpa_hexdump(MSG_DEBUG, | |
3290 | "TESTING: wpa_ie after RSNXE EAPOL override", | |
3291 | wpa_ie, wpa_ie_len); | |
3292 | } | |
3293 | #endif /* CONFIG_TESTING_OPTIONS */ | |
6fc6879b JM |
3294 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, |
3295 | "sending 3/4 msg of 4-Way Handshake"); | |
3296 | if (sm->wpa == WPA_VERSION_WPA2) { | |
3297 | /* WPA2 send GTK in the 4-way handshake */ | |
3298 | secure = 1; | |
3299 | gtk = gsm->GTK[gsm->GN - 1]; | |
3300 | gtk_len = gsm->GTK_len; | |
8d660a4b JM |
3301 | if (sm->wpa_auth->conf.disable_gtk || |
3302 | sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) { | |
83421850 JM |
3303 | /* |
3304 | * Provide unique random GTK to each STA to prevent use | |
3305 | * of GTK in the BSS. | |
3306 | */ | |
3307 | if (random_get_bytes(dummy_gtk, gtk_len) < 0) | |
f2c4b44b | 3308 | goto done; |
83421850 JM |
3309 | gtk = dummy_gtk; |
3310 | } | |
7a4b01c8 | 3311 | gtkidx = gsm->GN; |
6fc6879b JM |
3312 | _rsc = rsc; |
3313 | encr = 1; | |
3314 | } else { | |
3315 | /* WPA does not include GTK in msg 3/4 */ | |
3316 | secure = 0; | |
3317 | gtk = NULL; | |
3318 | gtk_len = 0; | |
6fc6879b | 3319 | _rsc = NULL; |
0d442aff JM |
3320 | if (sm->rx_eapol_key_secure) { |
3321 | /* | |
3322 | * It looks like Windows 7 supplicant tries to use | |
3323 | * Secure bit in msg 2/4 after having reported Michael | |
3324 | * MIC failure and it then rejects the 4-way handshake | |
3325 | * if msg 3/4 does not set Secure bit. Work around this | |
3326 | * by setting the Secure bit here even in the case of | |
3327 | * WPA if the supplicant used it first. | |
3328 | */ | |
3329 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
4740d5b9 JM |
3330 | "STA used Secure bit in WPA msg 2/4 - " |
3331 | "set Secure for 3/4 as workaround"); | |
0d442aff JM |
3332 | secure = 1; |
3333 | } | |
6fc6879b JM |
3334 | } |
3335 | ||
17c2559c | 3336 | kde_len = wpa_ie_len + ieee80211w_kde_len(sm) + ocv_oci_len(sm); |
6fc6879b JM |
3337 | if (gtk) |
3338 | kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len; | |
4ec1fd8e | 3339 | #ifdef CONFIG_IEEE80211R_AP |
86dfabb8 JM |
3340 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { |
3341 | kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */ | |
3342 | kde_len += 300; /* FTIE + 2 * TIE */ | |
3343 | } | |
4ec1fd8e | 3344 | #endif /* CONFIG_IEEE80211R_AP */ |
25ef8529 JM |
3345 | #ifdef CONFIG_P2P |
3346 | if (WPA_GET_BE32(sm->ip_addr) > 0) | |
3347 | kde_len += 2 + RSN_SELECTOR_LEN + 3 * 4; | |
3348 | #endif /* CONFIG_P2P */ | |
6fc6879b JM |
3349 | kde = os_malloc(kde_len); |
3350 | if (kde == NULL) | |
f2c4b44b | 3351 | goto done; |
6fc6879b JM |
3352 | |
3353 | pos = kde; | |
3354 | os_memcpy(pos, wpa_ie, wpa_ie_len); | |
3355 | pos += wpa_ie_len; | |
4ec1fd8e | 3356 | #ifdef CONFIG_IEEE80211R_AP |
26e23750 | 3357 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { |
59e78c24 JM |
3358 | int res; |
3359 | size_t elen; | |
3360 | ||
3361 | elen = pos - kde; | |
3362 | res = wpa_insert_pmkid(kde, &elen, sm->pmk_r1_name); | |
26e23750 JM |
3363 | if (res < 0) { |
3364 | wpa_printf(MSG_ERROR, "FT: Failed to insert " | |
3365 | "PMKR1Name into RSN IE in EAPOL-Key data"); | |
f2c4b44b | 3366 | goto done; |
26e23750 | 3367 | } |
59e78c24 JM |
3368 | pos -= wpa_ie_len; |
3369 | pos += elen; | |
26e23750 | 3370 | } |
4ec1fd8e | 3371 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b JM |
3372 | if (gtk) { |
3373 | u8 hdr[2]; | |
7a4b01c8 | 3374 | hdr[0] = gtkidx & 0x03; |
6fc6879b JM |
3375 | hdr[1] = 0; |
3376 | pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2, | |
3377 | gtk, gtk_len); | |
3378 | } | |
3379 | pos = ieee80211w_kde_add(sm, pos); | |
f2c4b44b JM |
3380 | if (ocv_oci_add(sm, &pos) < 0) |
3381 | goto done; | |
6fc6879b | 3382 | |
4ec1fd8e | 3383 | #ifdef CONFIG_IEEE80211R_AP |
86dfabb8 JM |
3384 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { |
3385 | int res; | |
3386 | struct wpa_auth_config *conf; | |
3387 | ||
3388 | conf = &sm->wpa_auth->conf; | |
9257610a JM |
3389 | if (sm->assoc_resp_ftie && |
3390 | kde + kde_len - pos >= 2 + sm->assoc_resp_ftie[1]) { | |
3391 | os_memcpy(pos, sm->assoc_resp_ftie, | |
3392 | 2 + sm->assoc_resp_ftie[1]); | |
3393 | res = 2 + sm->assoc_resp_ftie[1]; | |
3394 | } else { | |
a7968ea5 JM |
3395 | int use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt); |
3396 | ||
3397 | res = wpa_write_ftie(conf, use_sha384, | |
3398 | conf->r0_key_holder, | |
9257610a JM |
3399 | conf->r0_key_holder_len, |
3400 | NULL, NULL, pos, | |
3401 | kde + kde_len - pos, | |
3402 | NULL, 0); | |
3403 | } | |
86dfabb8 JM |
3404 | if (res < 0) { |
3405 | wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE " | |
3406 | "into EAPOL-Key Key Data"); | |
f2c4b44b | 3407 | goto done; |
86dfabb8 JM |
3408 | } |
3409 | pos += res; | |
3410 | ||
3411 | /* TIE[ReassociationDeadline] (TU) */ | |
3412 | *pos++ = WLAN_EID_TIMEOUT_INTERVAL; | |
3413 | *pos++ = 5; | |
3414 | *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE; | |
3415 | WPA_PUT_LE32(pos, conf->reassociation_deadline); | |
3416 | pos += 4; | |
3417 | ||
3418 | /* TIE[KeyLifetime] (seconds) */ | |
3419 | *pos++ = WLAN_EID_TIMEOUT_INTERVAL; | |
3420 | *pos++ = 5; | |
3421 | *pos++ = WLAN_TIMEOUT_KEY_LIFETIME; | |
83fe4bd3 | 3422 | WPA_PUT_LE32(pos, conf->r0_key_lifetime); |
86dfabb8 JM |
3423 | pos += 4; |
3424 | } | |
4ec1fd8e | 3425 | #endif /* CONFIG_IEEE80211R_AP */ |
25ef8529 JM |
3426 | #ifdef CONFIG_P2P |
3427 | if (WPA_GET_BE32(sm->ip_addr) > 0) { | |
3428 | u8 addr[3 * 4]; | |
3429 | os_memcpy(addr, sm->ip_addr, 4); | |
3430 | os_memcpy(addr + 4, sm->wpa_auth->conf.ip_addr_mask, 4); | |
3431 | os_memcpy(addr + 8, sm->wpa_auth->conf.ip_addr_go, 4); | |
3432 | pos = wpa_add_kde(pos, WFA_KEY_DATA_IP_ADDR_ALLOC, | |
3433 | addr, sizeof(addr), NULL, 0); | |
3434 | } | |
3435 | #endif /* CONFIG_P2P */ | |
86dfabb8 | 3436 | |
6fc6879b | 3437 | wpa_send_eapol(sm->wpa_auth, sm, |
b729fd8d | 3438 | (secure ? WPA_KEY_INFO_SECURE : 0) | |
567da5bb JM |
3439 | (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ? |
3440 | WPA_KEY_INFO_MIC : 0) | | |
6fc6879b JM |
3441 | WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL | |
3442 | WPA_KEY_INFO_KEY_TYPE, | |
7a4b01c8 | 3443 | _rsc, sm->ANonce, kde, pos - kde, 0, encr); |
f2c4b44b | 3444 | done: |
6fc6879b | 3445 | os_free(kde); |
f2c4b44b | 3446 | os_free(wpa_ie_buf); |
6fc6879b JM |
3447 | } |
3448 | ||
3449 | ||
3450 | SM_STATE(WPA_PTK, PTKINITDONE) | |
3451 | { | |
3452 | SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk); | |
3453 | sm->EAPOLKeyReceived = FALSE; | |
3454 | if (sm->Pair) { | |
c3550295 JM |
3455 | enum wpa_alg alg = wpa_cipher_to_alg(sm->pairwise); |
3456 | int klen = wpa_cipher_key_len(sm->pairwise); | |
6fc6879b | 3457 | if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0, |
a919a260 AW |
3458 | sm->PTK.tk, klen, |
3459 | KEY_FLAG_PAIRWISE_RX_TX)) { | |
567da5bb JM |
3460 | wpa_sta_disconnect(sm->wpa_auth, sm->addr, |
3461 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
6fc6879b JM |
3462 | return; |
3463 | } | |
3464 | /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */ | |
3465 | sm->pairwise_set = TRUE; | |
3466 | ||
a40bd06e | 3467 | wpa_auth_set_ptk_rekey_timer(sm); |
581a8cde | 3468 | |
a1ea1b45 | 3469 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) || |
567da5bb | 3470 | sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP || |
a1ea1b45 | 3471 | sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) { |
6fc6879b JM |
3472 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, |
3473 | WPA_EAPOL_authorized, 1); | |
3474 | } | |
3475 | } | |
3476 | ||
3477 | if (0 /* IBSS == TRUE */) { | |
3478 | sm->keycount++; | |
3479 | if (sm->keycount == 2) { | |
3480 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, | |
3481 | WPA_EAPOL_portValid, 1); | |
3482 | } | |
3483 | } else { | |
3484 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, | |
3485 | 1); | |
3486 | } | |
3487 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0); | |
3488 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1); | |
3489 | if (sm->wpa == WPA_VERSION_WPA) | |
3490 | sm->PInitAKeys = TRUE; | |
3491 | else | |
3492 | sm->has_GTK = TRUE; | |
3493 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO, | |
3494 | "pairwise key handshake completed (%s)", | |
3495 | sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN"); | |
3496 | ||
4ec1fd8e | 3497 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b | 3498 | wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr); |
4ec1fd8e | 3499 | #endif /* CONFIG_IEEE80211R_AP */ |
6fc6879b JM |
3500 | } |
3501 | ||
3502 | ||
3503 | SM_STEP(WPA_PTK) | |
3504 | { | |
3505 | struct wpa_authenticator *wpa_auth = sm->wpa_auth; | |
3506 | ||
3507 | if (sm->Init) | |
3508 | SM_ENTER(WPA_PTK, INITIALIZE); | |
3509 | else if (sm->Disconnect | |
1aae01fc BG |
3510 | /* || FIX: dot11RSNAConfigSALifetime timeout */) { |
3511 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
3512 | "WPA_PTK: sm->Disconnect"); | |
6fc6879b | 3513 | SM_ENTER(WPA_PTK, DISCONNECT); |
1aae01fc | 3514 | } |
6fc6879b JM |
3515 | else if (sm->DeauthenticationRequest) |
3516 | SM_ENTER(WPA_PTK, DISCONNECTED); | |
3517 | else if (sm->AuthenticationRequest) | |
3518 | SM_ENTER(WPA_PTK, AUTHENTICATION); | |
3519 | else if (sm->ReAuthenticationRequest) | |
3520 | SM_ENTER(WPA_PTK, AUTHENTICATION2); | |
0adc9b28 JM |
3521 | else if (sm->PTKRequest) { |
3522 | if (wpa_auth_sm_ptk_update(sm) < 0) | |
3523 | SM_ENTER(WPA_PTK, DISCONNECTED); | |
3524 | else | |
3525 | SM_ENTER(WPA_PTK, PTKSTART); | |
3526 | } else switch (sm->wpa_ptk_state) { | |
6fc6879b JM |
3527 | case WPA_PTK_INITIALIZE: |
3528 | break; | |
3529 | case WPA_PTK_DISCONNECT: | |
3530 | SM_ENTER(WPA_PTK, DISCONNECTED); | |
3531 | break; | |
3532 | case WPA_PTK_DISCONNECTED: | |
3533 | SM_ENTER(WPA_PTK, INITIALIZE); | |
3534 | break; | |
3535 | case WPA_PTK_AUTHENTICATION: | |
3536 | SM_ENTER(WPA_PTK, AUTHENTICATION2); | |
3537 | break; | |
3538 | case WPA_PTK_AUTHENTICATION2: | |
56586197 | 3539 | if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) && |
6fc6879b JM |
3540 | wpa_auth_get_eapol(sm->wpa_auth, sm->addr, |
3541 | WPA_EAPOL_keyRun) > 0) | |
3542 | SM_ENTER(WPA_PTK, INITPMK); | |
a1ea1b45 JM |
3543 | else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) || |
3544 | sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE | |
6fc6879b JM |
3545 | /* FIX: && 802.1X::keyRun */) |
3546 | SM_ENTER(WPA_PTK, INITPSK); | |
567da5bb JM |
3547 | else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP) |
3548 | SM_ENTER(WPA_PTK, INITPMK); | |
6fc6879b JM |
3549 | break; |
3550 | case WPA_PTK_INITPMK: | |
3551 | if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr, | |
567da5bb | 3552 | WPA_EAPOL_keyAvailable) > 0) { |
6fc6879b | 3553 | SM_ENTER(WPA_PTK, PTKSTART); |
567da5bb JM |
3554 | #ifdef CONFIG_DPP |
3555 | } else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP && sm->pmksa) { | |
3556 | SM_ENTER(WPA_PTK, PTKSTART); | |
3557 | #endif /* CONFIG_DPP */ | |
3558 | } else { | |
6fc6879b | 3559 | wpa_auth->dot11RSNA4WayHandshakeFailures++; |
1aae01fc BG |
3560 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO, |
3561 | "INITPMK - keyAvailable = false"); | |
6fc6879b JM |
3562 | SM_ENTER(WPA_PTK, DISCONNECT); |
3563 | } | |
3564 | break; | |
3565 | case WPA_PTK_INITPSK: | |
759fd76b | 3566 | if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr, |
dbfa691d | 3567 | NULL, NULL, NULL)) { |
6fc6879b | 3568 | SM_ENTER(WPA_PTK, PTKSTART); |
e61fea6b JM |
3569 | #ifdef CONFIG_SAE |
3570 | } else if (wpa_auth_uses_sae(sm) && sm->pmksa) { | |
3571 | SM_ENTER(WPA_PTK, PTKSTART); | |
3572 | #endif /* CONFIG_SAE */ | |
3573 | } else { | |
6fc6879b JM |
3574 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO, |
3575 | "no PSK configured for the STA"); | |
3576 | wpa_auth->dot11RSNA4WayHandshakeFailures++; | |
3577 | SM_ENTER(WPA_PTK, DISCONNECT); | |
3578 | } | |
3579 | break; | |
3580 | case WPA_PTK_PTKSTART: | |
3581 | if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest && | |
3582 | sm->EAPOLKeyPairwise) | |
3583 | SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING); | |
3584 | else if (sm->TimeoutCtr > | |
41f140d3 | 3585 | sm->wpa_auth->conf.wpa_pairwise_update_count) { |
6fc6879b | 3586 | wpa_auth->dot11RSNA4WayHandshakeFailures++; |
41f140d3 GK |
3587 | wpa_auth_vlogger( |
3588 | sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
3589 | "PTKSTART: Retry limit %u reached", | |
3590 | sm->wpa_auth->conf.wpa_pairwise_update_count); | |
6fc6879b JM |
3591 | SM_ENTER(WPA_PTK, DISCONNECT); |
3592 | } else if (sm->TimeoutEvt) | |
3593 | SM_ENTER(WPA_PTK, PTKSTART); | |
3594 | break; | |
3595 | case WPA_PTK_PTKCALCNEGOTIATING: | |
3596 | if (sm->MICVerified) | |
3597 | SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2); | |
3598 | else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest && | |
3599 | sm->EAPOLKeyPairwise) | |
3600 | SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING); | |
3601 | else if (sm->TimeoutEvt) | |
3602 | SM_ENTER(WPA_PTK, PTKSTART); | |
3603 | break; | |
3604 | case WPA_PTK_PTKCALCNEGOTIATING2: | |
3605 | SM_ENTER(WPA_PTK, PTKINITNEGOTIATING); | |
3606 | break; | |
3607 | case WPA_PTK_PTKINITNEGOTIATING: | |
68921e24 JM |
3608 | if (sm->update_snonce) |
3609 | SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING); | |
3610 | else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest && | |
3611 | sm->EAPOLKeyPairwise && sm->MICVerified) | |
6fc6879b JM |
3612 | SM_ENTER(WPA_PTK, PTKINITDONE); |
3613 | else if (sm->TimeoutCtr > | |
6f234c1e JM |
3614 | sm->wpa_auth->conf.wpa_pairwise_update_count || |
3615 | (sm->wpa_auth->conf.wpa_disable_eapol_key_retries && | |
3616 | sm->TimeoutCtr > 1)) { | |
6fc6879b | 3617 | wpa_auth->dot11RSNA4WayHandshakeFailures++; |
41f140d3 GK |
3618 | wpa_auth_vlogger( |
3619 | sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
3620 | "PTKINITNEGOTIATING: Retry limit %u reached", | |
3621 | sm->wpa_auth->conf.wpa_pairwise_update_count); | |
6fc6879b JM |
3622 | SM_ENTER(WPA_PTK, DISCONNECT); |
3623 | } else if (sm->TimeoutEvt) | |
3624 | SM_ENTER(WPA_PTK, PTKINITNEGOTIATING); | |
3625 | break; | |
3626 | case WPA_PTK_PTKINITDONE: | |
3627 | break; | |
3628 | } | |
3629 | } | |
3630 | ||
3631 | ||
3632 | SM_STATE(WPA_PTK_GROUP, IDLE) | |
3633 | { | |
3634 | SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group); | |
3635 | if (sm->Init) { | |
3636 | /* Init flag is not cleared here, so avoid busy | |
3637 | * loop by claiming nothing changed. */ | |
3638 | sm->changed = FALSE; | |
3639 | } | |
3640 | sm->GTimeoutCtr = 0; | |
3641 | } | |
3642 | ||
3643 | ||
3644 | SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING) | |
3645 | { | |
3646 | u8 rsc[WPA_KEY_RSC_LEN]; | |
3647 | struct wpa_group *gsm = sm->group; | |
e41e4f9e JM |
3648 | const u8 *kde; |
3649 | u8 *kde_buf = NULL, *pos, hdr[2]; | |
6fc6879b | 3650 | size_t kde_len; |
83421850 | 3651 | u8 *gtk, dummy_gtk[32]; |
6fc6879b JM |
3652 | |
3653 | SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group); | |
bae61562 JM |
3654 | |
3655 | sm->GTimeoutCtr++; | |
6f234c1e JM |
3656 | if (sm->wpa_auth->conf.wpa_disable_eapol_key_retries && |
3657 | sm->GTimeoutCtr > 1) { | |
3658 | /* Do not allow retransmission of EAPOL-Key group msg 1/2 */ | |
3659 | return; | |
3660 | } | |
41f140d3 | 3661 | if (sm->GTimeoutCtr > sm->wpa_auth->conf.wpa_group_update_count) { |
bae61562 JM |
3662 | /* No point in sending the EAPOL-Key - we will disconnect |
3663 | * immediately following this. */ | |
3664 | return; | |
3665 | } | |
3666 | ||
6fc6879b JM |
3667 | if (sm->wpa == WPA_VERSION_WPA) |
3668 | sm->PInitAKeys = FALSE; | |
3669 | sm->TimeoutEvt = FALSE; | |
3670 | /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */ | |
3671 | os_memset(rsc, 0, WPA_KEY_RSC_LEN); | |
3672 | if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE) | |
3673 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc); | |
3674 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
3675 | "sending 1/2 msg of Group Key Handshake"); | |
3676 | ||
83421850 | 3677 | gtk = gsm->GTK[gsm->GN - 1]; |
8d660a4b JM |
3678 | if (sm->wpa_auth->conf.disable_gtk || |
3679 | sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) { | |
83421850 JM |
3680 | /* |
3681 | * Provide unique random GTK to each STA to prevent use | |
3682 | * of GTK in the BSS. | |
3683 | */ | |
3684 | if (random_get_bytes(dummy_gtk, gsm->GTK_len) < 0) | |
3685 | return; | |
3686 | gtk = dummy_gtk; | |
3687 | } | |
6fc6879b JM |
3688 | if (sm->wpa == WPA_VERSION_WPA2) { |
3689 | kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len + | |
17c2559c | 3690 | ieee80211w_kde_len(sm) + ocv_oci_len(sm); |
e41e4f9e JM |
3691 | kde_buf = os_malloc(kde_len); |
3692 | if (kde_buf == NULL) | |
6fc6879b JM |
3693 | return; |
3694 | ||
e41e4f9e | 3695 | kde = pos = kde_buf; |
6fc6879b JM |
3696 | hdr[0] = gsm->GN & 0x03; |
3697 | hdr[1] = 0; | |
3698 | pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2, | |
83421850 | 3699 | gtk, gsm->GTK_len); |
6fc6879b | 3700 | pos = ieee80211w_kde_add(sm, pos); |
17c2559c MV |
3701 | if (ocv_oci_add(sm, &pos) < 0) { |
3702 | os_free(kde_buf); | |
3703 | return; | |
3704 | } | |
e41e4f9e | 3705 | kde_len = pos - kde; |
6fc6879b | 3706 | } else { |
83421850 | 3707 | kde = gtk; |
e41e4f9e | 3708 | kde_len = gsm->GTK_len; |
6fc6879b JM |
3709 | } |
3710 | ||
3711 | wpa_send_eapol(sm->wpa_auth, sm, | |
b729fd8d | 3712 | WPA_KEY_INFO_SECURE | |
567da5bb JM |
3713 | (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ? |
3714 | WPA_KEY_INFO_MIC : 0) | | |
6fc6879b JM |
3715 | WPA_KEY_INFO_ACK | |
3716 | (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0), | |
b0fb2be7 | 3717 | rsc, NULL, kde, kde_len, gsm->GN, 1); |
e41e4f9e JM |
3718 | |
3719 | os_free(kde_buf); | |
6fc6879b JM |
3720 | } |
3721 | ||
3722 | ||
3723 | SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED) | |
3724 | { | |
aed61c4e MV |
3725 | #ifdef CONFIG_OCV |
3726 | struct wpa_authenticator *wpa_auth = sm->wpa_auth; | |
3727 | const u8 *key_data, *mic; | |
3728 | struct ieee802_1x_hdr *hdr; | |
3729 | struct wpa_eapol_key *key; | |
3730 | struct wpa_eapol_ie_parse kde; | |
3731 | size_t mic_len; | |
3732 | u16 key_data_length; | |
3733 | #endif /* CONFIG_OCV */ | |
3734 | ||
6fc6879b JM |
3735 | SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group); |
3736 | sm->EAPOLKeyReceived = FALSE; | |
aed61c4e MV |
3737 | |
3738 | #ifdef CONFIG_OCV | |
3739 | mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len); | |
3740 | ||
3741 | /* | |
3742 | * Note: last_rx_eapol_key length fields have already been validated in | |
3743 | * wpa_receive(). | |
3744 | */ | |
3745 | hdr = (struct ieee802_1x_hdr *) sm->last_rx_eapol_key; | |
3746 | key = (struct wpa_eapol_key *) (hdr + 1); | |
3747 | mic = (u8 *) (key + 1); | |
3748 | key_data = mic + mic_len + 2; | |
3749 | key_data_length = WPA_GET_BE16(mic + mic_len); | |
3750 | if (key_data_length > sm->last_rx_eapol_key_len - sizeof(*hdr) - | |
3751 | sizeof(*key) - mic_len - 2) | |
3752 | return; | |
3753 | ||
3754 | if (wpa_parse_kde_ies(key_data, key_data_length, &kde) < 0) { | |
3755 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
3756 | "received EAPOL-Key group msg 2/2 with invalid Key Data contents"); | |
3757 | return; | |
3758 | } | |
3759 | ||
3760 | if (wpa_auth_uses_ocv(sm)) { | |
3761 | struct wpa_channel_info ci; | |
3762 | int tx_chanwidth; | |
3763 | int tx_seg1_idx; | |
3764 | ||
3765 | if (wpa_channel_info(wpa_auth, &ci) != 0) { | |
3766 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
3767 | "Failed to get channel info to validate received OCI in EAPOL-Key group 1/2"); | |
3768 | return; | |
3769 | } | |
3770 | ||
3771 | if (get_sta_tx_parameters(sm, | |
3772 | channel_width_to_int(ci.chanwidth), | |
3773 | ci.seg1_idx, &tx_chanwidth, | |
3774 | &tx_seg1_idx) < 0) | |
3775 | return; | |
3776 | ||
3777 | if (ocv_verify_tx_params(kde.oci, kde.oci_len, &ci, | |
3778 | tx_chanwidth, tx_seg1_idx) != 0) { | |
3779 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
3780 | ocv_errorstr); | |
3781 | return; | |
3782 | } | |
3783 | } | |
3784 | #endif /* CONFIG_OCV */ | |
3785 | ||
6fc6879b JM |
3786 | if (sm->GUpdateStationKeys) |
3787 | sm->group->GKeyDoneStations--; | |
3788 | sm->GUpdateStationKeys = FALSE; | |
3789 | sm->GTimeoutCtr = 0; | |
3790 | /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */ | |
3791 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO, | |
3792 | "group key handshake completed (%s)", | |
3793 | sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN"); | |
3794 | sm->has_GTK = TRUE; | |
3795 | } | |
3796 | ||
3797 | ||
3798 | SM_STATE(WPA_PTK_GROUP, KEYERROR) | |
3799 | { | |
3800 | SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group); | |
3801 | if (sm->GUpdateStationKeys) | |
3802 | sm->group->GKeyDoneStations--; | |
3803 | sm->GUpdateStationKeys = FALSE; | |
3804 | sm->Disconnect = TRUE; | |
4bb9b674 GK |
3805 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO, |
3806 | "group key handshake failed (%s) after %u tries", | |
3807 | sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN", | |
3808 | sm->wpa_auth->conf.wpa_group_update_count); | |
6fc6879b JM |
3809 | } |
3810 | ||
3811 | ||
3812 | SM_STEP(WPA_PTK_GROUP) | |
3813 | { | |
9663596f | 3814 | if (sm->Init || sm->PtkGroupInit) { |
6fc6879b | 3815 | SM_ENTER(WPA_PTK_GROUP, IDLE); |
9663596f JM |
3816 | sm->PtkGroupInit = FALSE; |
3817 | } else switch (sm->wpa_ptk_group_state) { | |
6fc6879b JM |
3818 | case WPA_PTK_GROUP_IDLE: |
3819 | if (sm->GUpdateStationKeys || | |
3820 | (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys)) | |
3821 | SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING); | |
3822 | break; | |
3823 | case WPA_PTK_GROUP_REKEYNEGOTIATING: | |
3824 | if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest && | |
3825 | !sm->EAPOLKeyPairwise && sm->MICVerified) | |
3826 | SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED); | |
3827 | else if (sm->GTimeoutCtr > | |
6f234c1e JM |
3828 | sm->wpa_auth->conf.wpa_group_update_count || |
3829 | (sm->wpa_auth->conf.wpa_disable_eapol_key_retries && | |
3830 | sm->GTimeoutCtr > 1)) | |
6fc6879b JM |
3831 | SM_ENTER(WPA_PTK_GROUP, KEYERROR); |
3832 | else if (sm->TimeoutEvt) | |
3833 | SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING); | |
3834 | break; | |
3835 | case WPA_PTK_GROUP_KEYERROR: | |
3836 | SM_ENTER(WPA_PTK_GROUP, IDLE); | |
3837 | break; | |
3838 | case WPA_PTK_GROUP_REKEYESTABLISHED: | |
3839 | SM_ENTER(WPA_PTK_GROUP, IDLE); | |
3840 | break; | |
3841 | } | |
3842 | } | |
3843 | ||
3844 | ||
3845 | static int wpa_gtk_update(struct wpa_authenticator *wpa_auth, | |
3846 | struct wpa_group *group) | |
3847 | { | |
3848 | int ret = 0; | |
555dcd75 | 3849 | size_t len; |
6fc6879b | 3850 | |
6fc6879b JM |
3851 | os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN); |
3852 | inc_byte_array(group->Counter, WPA_NONCE_LEN); | |
3c7302c2 JM |
3853 | if (wpa_gmk_to_gtk(group->GMK, "Group key expansion", |
3854 | wpa_auth->addr, group->GNonce, | |
3855 | group->GTK[group->GN - 1], group->GTK_len) < 0) | |
3856 | ret = -1; | |
5cb9d5c3 JM |
3857 | wpa_hexdump_key(MSG_DEBUG, "GTK", |
3858 | group->GTK[group->GN - 1], group->GTK_len); | |
6fc6879b | 3859 | |
70f8cc8e | 3860 | if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) { |
8dd9f9cd | 3861 | len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher); |
5cb9d5c3 JM |
3862 | os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN); |
3863 | inc_byte_array(group->Counter, WPA_NONCE_LEN); | |
3c7302c2 JM |
3864 | if (wpa_gmk_to_gtk(group->GMK, "IGTK key expansion", |
3865 | wpa_auth->addr, group->GNonce, | |
8dd9f9cd | 3866 | group->IGTK[group->GN_igtk - 4], len) < 0) |
3c7302c2 | 3867 | ret = -1; |
6fc6879b | 3868 | wpa_hexdump_key(MSG_DEBUG, "IGTK", |
8dd9f9cd | 3869 | group->IGTK[group->GN_igtk - 4], len); |
6fc6879b | 3870 | } |
6fc6879b | 3871 | |
555dcd75 JM |
3872 | if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION && |
3873 | wpa_auth->conf.beacon_prot) { | |
3874 | len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher); | |
3875 | os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN); | |
3876 | inc_byte_array(group->Counter, WPA_NONCE_LEN); | |
3877 | if (wpa_gmk_to_gtk(group->GMK, "BIGTK key expansion", | |
3878 | wpa_auth->addr, group->GNonce, | |
3879 | group->BIGTK[group->GN_bigtk - 6], len) < 0) | |
3880 | ret = -1; | |
3881 | wpa_hexdump_key(MSG_DEBUG, "BIGTK", | |
3882 | group->BIGTK[group->GN_bigtk - 6], len); | |
3883 | } | |
3884 | ||
6fc6879b JM |
3885 | return ret; |
3886 | } | |
3887 | ||
3888 | ||
3889 | static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth, | |
3890 | struct wpa_group *group) | |
3891 | { | |
3892 | wpa_printf(MSG_DEBUG, "WPA: group state machine entering state " | |
3893 | "GTK_INIT (VLAN-ID %d)", group->vlan_id); | |
3894 | group->changed = FALSE; /* GInit is not cleared here; avoid loop */ | |
3895 | group->wpa_group_state = WPA_GROUP_GTK_INIT; | |
3896 | ||
3897 | /* GTK[0..N] = 0 */ | |
3898 | os_memset(group->GTK, 0, sizeof(group->GTK)); | |
3899 | group->GN = 1; | |
3900 | group->GM = 2; | |
6fc6879b JM |
3901 | group->GN_igtk = 4; |
3902 | group->GM_igtk = 5; | |
555dcd75 JM |
3903 | group->GN_bigtk = 6; |
3904 | group->GM_bigtk = 7; | |
6fc6879b JM |
3905 | /* GTK[GN] = CalcGTK() */ |
3906 | wpa_gtk_update(wpa_auth, group); | |
3907 | } | |
3908 | ||
3909 | ||
3910 | static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx) | |
3911 | { | |
473b6f22 MB |
3912 | if (ctx != NULL && ctx != sm->group) |
3913 | return 0; | |
3914 | ||
6fc6879b JM |
3915 | if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) { |
3916 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
3917 | "Not in PTKINITDONE; skip Group Key update"); | |
3c183894 | 3918 | sm->GUpdateStationKeys = FALSE; |
6fc6879b JM |
3919 | return 0; |
3920 | } | |
9663596f JM |
3921 | if (sm->GUpdateStationKeys) { |
3922 | /* | |
3c183894 JM |
3923 | * This should not really happen, so add a debug log entry. |
3924 | * Since we clear the GKeyDoneStations before the loop, the | |
3925 | * station needs to be counted here anyway. | |
9663596f JM |
3926 | */ |
3927 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
3c183894 JM |
3928 | "GUpdateStationKeys was already set when " |
3929 | "marking station for GTK rekeying"); | |
9663596f | 3930 | } |
3c183894 | 3931 | |
ad3872a3 | 3932 | /* Do not rekey GTK/IGTK when STA is in WNM-Sleep Mode */ |
d32d94db XC |
3933 | if (sm->is_wnmsleep) |
3934 | return 0; | |
d32d94db | 3935 | |
3c183894 JM |
3936 | sm->group->GKeyDoneStations++; |
3937 | sm->GUpdateStationKeys = TRUE; | |
3938 | ||
6fc6879b JM |
3939 | wpa_sm_step(sm); |
3940 | return 0; | |
3941 | } | |
3942 | ||
3943 | ||
b5bf84ba | 3944 | #ifdef CONFIG_WNM_AP |
ad3872a3 | 3945 | /* update GTK when exiting WNM-Sleep Mode */ |
d32d94db XC |
3946 | void wpa_wnmsleep_rekey_gtk(struct wpa_state_machine *sm) |
3947 | { | |
629edfef | 3948 | if (sm == NULL || sm->is_wnmsleep) |
d32d94db XC |
3949 | return; |
3950 | ||
3951 | wpa_group_update_sta(sm, NULL); | |
3952 | } | |
3953 | ||
3954 | ||
3955 | void wpa_set_wnmsleep(struct wpa_state_machine *sm, int flag) | |
3956 | { | |
629edfef JM |
3957 | if (sm) |
3958 | sm->is_wnmsleep = !!flag; | |
d32d94db XC |
3959 | } |
3960 | ||
3961 | ||
3962 | int wpa_wnmsleep_gtk_subelem(struct wpa_state_machine *sm, u8 *pos) | |
3963 | { | |
d32d94db | 3964 | struct wpa_group *gsm = sm->group; |
835822d4 | 3965 | u8 *start = pos; |
d32d94db XC |
3966 | |
3967 | /* | |
835822d4 | 3968 | * GTK subelement: |
d32d94db | 3969 | * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] | |
835822d4 | 3970 | * Key[5..32] |
d32d94db | 3971 | */ |
835822d4 JM |
3972 | *pos++ = WNM_SLEEP_SUBELEM_GTK; |
3973 | *pos++ = 11 + gsm->GTK_len; | |
d32d94db | 3974 | /* Key ID in B0-B1 of Key Info */ |
835822d4 JM |
3975 | WPA_PUT_LE16(pos, gsm->GN & 0x03); |
3976 | pos += 2; | |
3977 | *pos++ = gsm->GTK_len; | |
3978 | if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, pos) != 0) | |
d32d94db | 3979 | return 0; |
835822d4 JM |
3980 | pos += 8; |
3981 | os_memcpy(pos, gsm->GTK[gsm->GN - 1], gsm->GTK_len); | |
3982 | pos += gsm->GTK_len; | |
d32d94db | 3983 | |
835822d4 JM |
3984 | wpa_printf(MSG_DEBUG, "WNM: GTK Key ID %u in WNM-Sleep Mode exit", |
3985 | gsm->GN); | |
3986 | wpa_hexdump_key(MSG_DEBUG, "WNM: GTK in WNM-Sleep Mode exit", | |
d32d94db | 3987 | gsm->GTK[gsm->GN - 1], gsm->GTK_len); |
d32d94db | 3988 | |
835822d4 | 3989 | return pos - start; |
d32d94db XC |
3990 | } |
3991 | ||
3992 | ||
d32d94db XC |
3993 | int wpa_wnmsleep_igtk_subelem(struct wpa_state_machine *sm, u8 *pos) |
3994 | { | |
d32d94db | 3995 | struct wpa_group *gsm = sm->group; |
835822d4 | 3996 | u8 *start = pos; |
8dd9f9cd | 3997 | size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher); |
d32d94db | 3998 | |
835822d4 JM |
3999 | /* |
4000 | * IGTK subelement: | |
4001 | * Sub-elem ID[1] | Length[1] | KeyID[2] | PN[6] | Key[16] | |
4002 | */ | |
4003 | *pos++ = WNM_SLEEP_SUBELEM_IGTK; | |
8dd9f9cd | 4004 | *pos++ = 2 + 6 + len; |
835822d4 JM |
4005 | WPA_PUT_LE16(pos, gsm->GN_igtk); |
4006 | pos += 2; | |
4007 | if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos) != 0) | |
d32d94db | 4008 | return 0; |
835822d4 | 4009 | pos += 6; |
d32d94db | 4010 | |
8dd9f9cd JM |
4011 | os_memcpy(pos, gsm->IGTK[gsm->GN_igtk - 4], len); |
4012 | pos += len; | |
d32d94db | 4013 | |
835822d4 JM |
4014 | wpa_printf(MSG_DEBUG, "WNM: IGTK Key ID %u in WNM-Sleep Mode exit", |
4015 | gsm->GN_igtk); | |
4016 | wpa_hexdump_key(MSG_DEBUG, "WNM: IGTK in WNM-Sleep Mode exit", | |
8dd9f9cd | 4017 | gsm->IGTK[gsm->GN_igtk - 4], len); |
d32d94db | 4018 | |
835822d4 | 4019 | return pos - start; |
d32d94db | 4020 | } |
7d2ed8ba | 4021 | |
16889aff JM |
4022 | |
4023 | int wpa_wnmsleep_bigtk_subelem(struct wpa_state_machine *sm, u8 *pos) | |
4024 | { | |
4025 | struct wpa_group *gsm = sm->group; | |
4026 | u8 *start = pos; | |
4027 | size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher); | |
4028 | ||
4029 | /* | |
4030 | * BIGTK subelement: | |
4031 | * Sub-elem ID[1] | Length[1] | KeyID[2] | PN[6] | Key[16] | |
4032 | */ | |
4033 | *pos++ = WNM_SLEEP_SUBELEM_BIGTK; | |
4034 | *pos++ = 2 + 6 + len; | |
4035 | WPA_PUT_LE16(pos, gsm->GN_bigtk); | |
4036 | pos += 2; | |
4037 | if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_bigtk, pos) != 0) | |
4038 | return 0; | |
4039 | pos += 6; | |
4040 | ||
4041 | os_memcpy(pos, gsm->BIGTK[gsm->GN_bigtk - 6], len); | |
4042 | pos += len; | |
4043 | ||
4044 | wpa_printf(MSG_DEBUG, "WNM: BIGTK Key ID %u in WNM-Sleep Mode exit", | |
4045 | gsm->GN_bigtk); | |
4046 | wpa_hexdump_key(MSG_DEBUG, "WNM: BIGTK in WNM-Sleep Mode exit", | |
4047 | gsm->IGTK[gsm->GN_bigtk - 6], len); | |
4048 | ||
4049 | return pos - start; | |
4050 | } | |
4051 | ||
b5bf84ba | 4052 | #endif /* CONFIG_WNM_AP */ |
d32d94db XC |
4053 | |
4054 | ||
6fc6879b JM |
4055 | static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth, |
4056 | struct wpa_group *group) | |
4057 | { | |
4058 | int tmp; | |
4059 | ||
4060 | wpa_printf(MSG_DEBUG, "WPA: group state machine entering state " | |
4061 | "SETKEYS (VLAN-ID %d)", group->vlan_id); | |
4062 | group->changed = TRUE; | |
4063 | group->wpa_group_state = WPA_GROUP_SETKEYS; | |
4064 | group->GTKReKey = FALSE; | |
4065 | tmp = group->GM; | |
4066 | group->GM = group->GN; | |
4067 | group->GN = tmp; | |
6fc6879b JM |
4068 | tmp = group->GM_igtk; |
4069 | group->GM_igtk = group->GN_igtk; | |
4070 | group->GN_igtk = tmp; | |
555dcd75 JM |
4071 | tmp = group->GM_bigtk; |
4072 | group->GM_bigtk = group->GN_bigtk; | |
4073 | group->GN_bigtk = tmp; | |
6fc6879b JM |
4074 | /* "GKeyDoneStations = GNoStations" is done in more robust way by |
4075 | * counting the STAs that are marked with GUpdateStationKeys instead of | |
4076 | * including all STAs that could be in not-yet-completed state. */ | |
4077 | wpa_gtk_update(wpa_auth, group); | |
4078 | ||
3c183894 JM |
4079 | if (group->GKeyDoneStations) { |
4080 | wpa_printf(MSG_DEBUG, "wpa_group_setkeys: Unexpected " | |
4081 | "GKeyDoneStations=%d when starting new GTK rekey", | |
4082 | group->GKeyDoneStations); | |
4083 | group->GKeyDoneStations = 0; | |
4084 | } | |
473b6f22 | 4085 | wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, group); |
6fc6879b JM |
4086 | wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d", |
4087 | group->GKeyDoneStations); | |
4088 | } | |
4089 | ||
4090 | ||
1bdb7ab3 JM |
4091 | static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth, |
4092 | struct wpa_group *group) | |
6fc6879b | 4093 | { |
3c7302c2 JM |
4094 | int ret = 0; |
4095 | ||
3c7302c2 | 4096 | if (wpa_auth_set_key(wpa_auth, group->vlan_id, |
c3550295 | 4097 | wpa_cipher_to_alg(wpa_auth->conf.wpa_group), |
0382097e | 4098 | broadcast_ether_addr, group->GN, |
a919a260 AW |
4099 | group->GTK[group->GN - 1], group->GTK_len, |
4100 | KEY_FLAG_GROUP_TX_DEFAULT) < 0) | |
3c7302c2 | 4101 | ret = -1; |
6fc6879b | 4102 | |
8dd9f9cd JM |
4103 | if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) { |
4104 | enum wpa_alg alg; | |
4105 | size_t len; | |
4106 | ||
4107 | alg = wpa_cipher_to_alg(wpa_auth->conf.group_mgmt_cipher); | |
4108 | len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher); | |
4109 | ||
4110 | if (ret == 0 && | |
4111 | wpa_auth_set_key(wpa_auth, group->vlan_id, alg, | |
4112 | broadcast_ether_addr, group->GN_igtk, | |
a919a260 AW |
4113 | group->IGTK[group->GN_igtk - 4], len, |
4114 | KEY_FLAG_GROUP_TX_DEFAULT) < 0) | |
8dd9f9cd | 4115 | ret = -1; |
555dcd75 JM |
4116 | |
4117 | if (ret == 0 && wpa_auth->conf.beacon_prot && | |
4118 | wpa_auth_set_key(wpa_auth, group->vlan_id, alg, | |
4119 | broadcast_ether_addr, group->GN_bigtk, | |
4120 | group->BIGTK[group->GN_bigtk - 6], len, | |
4121 | KEY_FLAG_GROUP_TX_DEFAULT) < 0) | |
4122 | ret = -1; | |
8dd9f9cd | 4123 | } |
3c7302c2 JM |
4124 | |
4125 | return ret; | |
6fc6879b JM |
4126 | } |
4127 | ||
4128 | ||
7d7f7be2 JM |
4129 | static int wpa_group_disconnect_cb(struct wpa_state_machine *sm, void *ctx) |
4130 | { | |
4131 | if (sm->group == ctx) { | |
4132 | wpa_printf(MSG_DEBUG, "WPA: Mark STA " MACSTR | |
4133 | " for discconnection due to fatal failure", | |
4134 | MAC2STR(sm->addr)); | |
4135 | sm->Disconnect = TRUE; | |
4136 | } | |
4137 | ||
4138 | return 0; | |
4139 | } | |
4140 | ||
4141 | ||
4142 | static void wpa_group_fatal_failure(struct wpa_authenticator *wpa_auth, | |
4143 | struct wpa_group *group) | |
4144 | { | |
4145 | wpa_printf(MSG_DEBUG, "WPA: group state machine entering state FATAL_FAILURE"); | |
4146 | group->changed = TRUE; | |
4147 | group->wpa_group_state = WPA_GROUP_FATAL_FAILURE; | |
4148 | wpa_auth_for_each_sta(wpa_auth, wpa_group_disconnect_cb, group); | |
4149 | } | |
4150 | ||
4151 | ||
1bdb7ab3 JM |
4152 | static int wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth, |
4153 | struct wpa_group *group) | |
4154 | { | |
4155 | wpa_printf(MSG_DEBUG, "WPA: group state machine entering state " | |
4156 | "SETKEYSDONE (VLAN-ID %d)", group->vlan_id); | |
4157 | group->changed = TRUE; | |
4158 | group->wpa_group_state = WPA_GROUP_SETKEYSDONE; | |
4159 | ||
7d7f7be2 JM |
4160 | if (wpa_group_config_group_keys(wpa_auth, group) < 0) { |
4161 | wpa_group_fatal_failure(wpa_auth, group); | |
1bdb7ab3 | 4162 | return -1; |
7d7f7be2 | 4163 | } |
1bdb7ab3 JM |
4164 | |
4165 | return 0; | |
4166 | } | |
4167 | ||
4168 | ||
6fc6879b JM |
4169 | static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth, |
4170 | struct wpa_group *group) | |
4171 | { | |
4172 | if (group->GInit) { | |
4173 | wpa_group_gtk_init(wpa_auth, group); | |
7d7f7be2 JM |
4174 | } else if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) { |
4175 | /* Do not allow group operations */ | |
6fc6879b JM |
4176 | } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT && |
4177 | group->GTKAuthenticator) { | |
4178 | wpa_group_setkeysdone(wpa_auth, group); | |
4179 | } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE && | |
4180 | group->GTKReKey) { | |
4181 | wpa_group_setkeys(wpa_auth, group); | |
4182 | } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) { | |
4183 | if (group->GKeyDoneStations == 0) | |
4184 | wpa_group_setkeysdone(wpa_auth, group); | |
4185 | else if (group->GTKReKey) | |
4186 | wpa_group_setkeys(wpa_auth, group); | |
4187 | } | |
4188 | } | |
4189 | ||
4190 | ||
e4a6ea1d | 4191 | static int wpa_sm_step(struct wpa_state_machine *sm) |
6fc6879b JM |
4192 | { |
4193 | if (sm == NULL) | |
e4a6ea1d | 4194 | return 0; |
6fc6879b JM |
4195 | |
4196 | if (sm->in_step_loop) { | |
4197 | /* This should not happen, but if it does, make sure we do not | |
4198 | * end up freeing the state machine too early by exiting the | |
4199 | * recursive call. */ | |
4200 | wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively"); | |
e4a6ea1d | 4201 | return 0; |
6fc6879b JM |
4202 | } |
4203 | ||
4204 | sm->in_step_loop = 1; | |
4205 | do { | |
4206 | if (sm->pending_deinit) | |
4207 | break; | |
4208 | ||
4209 | sm->changed = FALSE; | |
4210 | sm->wpa_auth->group->changed = FALSE; | |
4211 | ||
4212 | SM_STEP_RUN(WPA_PTK); | |
4213 | if (sm->pending_deinit) | |
4214 | break; | |
4215 | SM_STEP_RUN(WPA_PTK_GROUP); | |
4216 | if (sm->pending_deinit) | |
4217 | break; | |
4218 | wpa_group_sm_step(sm->wpa_auth, sm->group); | |
4219 | } while (sm->changed || sm->wpa_auth->group->changed); | |
4220 | sm->in_step_loop = 0; | |
4221 | ||
4222 | if (sm->pending_deinit) { | |
4223 | wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state " | |
4224 | "machine deinit for " MACSTR, MAC2STR(sm->addr)); | |
4225 | wpa_free_sta_sm(sm); | |
e4a6ea1d | 4226 | return 1; |
6fc6879b | 4227 | } |
e4a6ea1d | 4228 | return 0; |
6fc6879b JM |
4229 | } |
4230 | ||
4231 | ||
4232 | static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx) | |
4233 | { | |
4234 | struct wpa_state_machine *sm = eloop_ctx; | |
4235 | wpa_sm_step(sm); | |
4236 | } | |
4237 | ||
4238 | ||
4239 | void wpa_auth_sm_notify(struct wpa_state_machine *sm) | |
4240 | { | |
4241 | if (sm == NULL) | |
4242 | return; | |
4243 | eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL); | |
4244 | } | |
4245 | ||
4246 | ||
4247 | void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth) | |
4248 | { | |
4249 | int tmp, i; | |
4250 | struct wpa_group *group; | |
4251 | ||
4252 | if (wpa_auth == NULL) | |
4253 | return; | |
4254 | ||
4255 | group = wpa_auth->group; | |
4256 | ||
4257 | for (i = 0; i < 2; i++) { | |
4258 | tmp = group->GM; | |
4259 | group->GM = group->GN; | |
4260 | group->GN = tmp; | |
6fc6879b JM |
4261 | tmp = group->GM_igtk; |
4262 | group->GM_igtk = group->GN_igtk; | |
4263 | group->GN_igtk = tmp; | |
555dcd75 JM |
4264 | tmp = group->GM_bigtk; |
4265 | group->GM_bigtk = group->GN_bigtk; | |
4266 | group->GN_bigtk = tmp; | |
6fc6879b | 4267 | wpa_gtk_update(wpa_auth, group); |
9354e594 | 4268 | wpa_group_config_group_keys(wpa_auth, group); |
6fc6879b JM |
4269 | } |
4270 | } | |
4271 | ||
4272 | ||
a6da824b | 4273 | static const char * wpa_bool_txt(int val) |
6fc6879b | 4274 | { |
a6da824b | 4275 | return val ? "TRUE" : "FALSE"; |
6fc6879b JM |
4276 | } |
4277 | ||
4278 | ||
6fc6879b JM |
4279 | #define RSN_SUITE "%02x-%02x-%02x-%d" |
4280 | #define RSN_SUITE_ARG(s) \ | |
4281 | ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff | |
4282 | ||
4283 | int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen) | |
4284 | { | |
4285 | int len = 0, ret; | |
4286 | char pmkid_txt[PMKID_LEN * 2 + 1]; | |
8ce58ceb IH |
4287 | #ifdef CONFIG_RSN_PREAUTH |
4288 | const int preauth = 1; | |
4289 | #else /* CONFIG_RSN_PREAUTH */ | |
4290 | const int preauth = 0; | |
4291 | #endif /* CONFIG_RSN_PREAUTH */ | |
6fc6879b JM |
4292 | |
4293 | if (wpa_auth == NULL) | |
4294 | return len; | |
4295 | ||
4296 | ret = os_snprintf(buf + len, buflen - len, | |
4297 | "dot11RSNAOptionImplemented=TRUE\n" | |
8ce58ceb | 4298 | "dot11RSNAPreauthenticationImplemented=%s\n" |
6fc6879b JM |
4299 | "dot11RSNAEnabled=%s\n" |
4300 | "dot11RSNAPreauthenticationEnabled=%s\n", | |
8ce58ceb | 4301 | wpa_bool_txt(preauth), |
6fc6879b JM |
4302 | wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN), |
4303 | wpa_bool_txt(wpa_auth->conf.rsn_preauth)); | |
d85e1fc8 | 4304 | if (os_snprintf_error(buflen - len, ret)) |
6fc6879b JM |
4305 | return len; |
4306 | len += ret; | |
4307 | ||
4308 | wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt), | |
4309 | wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN); | |
4310 | ||
4311 | ret = os_snprintf( | |
4312 | buf + len, buflen - len, | |
4313 | "dot11RSNAConfigVersion=%u\n" | |
4314 | "dot11RSNAConfigPairwiseKeysSupported=9999\n" | |
4315 | /* FIX: dot11RSNAConfigGroupCipher */ | |
4316 | /* FIX: dot11RSNAConfigGroupRekeyMethod */ | |
4317 | /* FIX: dot11RSNAConfigGroupRekeyTime */ | |
4318 | /* FIX: dot11RSNAConfigGroupRekeyPackets */ | |
4319 | "dot11RSNAConfigGroupRekeyStrict=%u\n" | |
4320 | "dot11RSNAConfigGroupUpdateCount=%u\n" | |
4321 | "dot11RSNAConfigPairwiseUpdateCount=%u\n" | |
4322 | "dot11RSNAConfigGroupCipherSize=%u\n" | |
4323 | "dot11RSNAConfigPMKLifetime=%u\n" | |
4324 | "dot11RSNAConfigPMKReauthThreshold=%u\n" | |
4325 | "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n" | |
4326 | "dot11RSNAConfigSATimeout=%u\n" | |
4327 | "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n" | |
4328 | "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n" | |
4329 | "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n" | |
4330 | "dot11RSNAPMKIDUsed=%s\n" | |
4331 | "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n" | |
4332 | "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n" | |
4333 | "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n" | |
4334 | "dot11RSNATKIPCounterMeasuresInvoked=%u\n" | |
4335 | "dot11RSNA4WayHandshakeFailures=%u\n" | |
4336 | "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n", | |
4337 | RSN_VERSION, | |
4338 | !!wpa_auth->conf.wpa_strict_rekey, | |
41f140d3 GK |
4339 | wpa_auth->conf.wpa_group_update_count, |
4340 | wpa_auth->conf.wpa_pairwise_update_count, | |
c3550295 | 4341 | wpa_cipher_key_len(wpa_auth->conf.wpa_group) * 8, |
6fc6879b JM |
4342 | dot11RSNAConfigPMKLifetime, |
4343 | dot11RSNAConfigPMKReauthThreshold, | |
4344 | dot11RSNAConfigSATimeout, | |
4345 | RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected), | |
4346 | RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected), | |
4347 | RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected), | |
4348 | pmkid_txt, | |
4349 | RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested), | |
4350 | RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested), | |
4351 | RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested), | |
4352 | wpa_auth->dot11RSNATKIPCounterMeasuresInvoked, | |
4353 | wpa_auth->dot11RSNA4WayHandshakeFailures); | |
d85e1fc8 | 4354 | if (os_snprintf_error(buflen - len, ret)) |
6fc6879b JM |
4355 | return len; |
4356 | len += ret; | |
4357 | ||
4358 | /* TODO: dot11RSNAConfigPairwiseCiphersTable */ | |
4359 | /* TODO: dot11RSNAConfigAuthenticationSuitesTable */ | |
4360 | ||
4361 | /* Private MIB */ | |
4362 | ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n", | |
4363 | wpa_auth->group->wpa_group_state); | |
d85e1fc8 | 4364 | if (os_snprintf_error(buflen - len, ret)) |
6fc6879b JM |
4365 | return len; |
4366 | len += ret; | |
4367 | ||
4368 | return len; | |
4369 | } | |
4370 | ||
4371 | ||
4372 | int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen) | |
4373 | { | |
4374 | int len = 0, ret; | |
4375 | u32 pairwise = 0; | |
4376 | ||
4377 | if (sm == NULL) | |
4378 | return 0; | |
4379 | ||
4380 | /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */ | |
4381 | ||
4382 | /* dot11RSNAStatsEntry */ | |
4383 | ||
c3550295 JM |
4384 | pairwise = wpa_cipher_to_suite(sm->wpa == WPA_VERSION_WPA2 ? |
4385 | WPA_PROTO_RSN : WPA_PROTO_WPA, | |
4386 | sm->pairwise); | |
4387 | if (pairwise == 0) | |
6fc6879b JM |
4388 | return 0; |
4389 | ||
4390 | ret = os_snprintf( | |
4391 | buf + len, buflen - len, | |
4392 | /* TODO: dot11RSNAStatsIndex */ | |
4393 | "dot11RSNAStatsSTAAddress=" MACSTR "\n" | |
4394 | "dot11RSNAStatsVersion=1\n" | |
4395 | "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n" | |
4396 | /* TODO: dot11RSNAStatsTKIPICVErrors */ | |
4397 | "dot11RSNAStatsTKIPLocalMICFailures=%u\n" | |
d9040cdb | 4398 | "dot11RSNAStatsTKIPRemoteMICFailures=%u\n" |
6fc6879b JM |
4399 | /* TODO: dot11RSNAStatsCCMPReplays */ |
4400 | /* TODO: dot11RSNAStatsCCMPDecryptErrors */ | |
4401 | /* TODO: dot11RSNAStatsTKIPReplays */, | |
4402 | MAC2STR(sm->addr), | |
4403 | RSN_SUITE_ARG(pairwise), | |
4404 | sm->dot11RSNAStatsTKIPLocalMICFailures, | |
4405 | sm->dot11RSNAStatsTKIPRemoteMICFailures); | |
d85e1fc8 | 4406 | if (os_snprintf_error(buflen - len, ret)) |
6fc6879b JM |
4407 | return len; |
4408 | len += ret; | |
4409 | ||
4410 | /* Private MIB */ | |
4411 | ret = os_snprintf(buf + len, buflen - len, | |
d1b1f9fa JM |
4412 | "wpa=%d\n" |
4413 | "AKMSuiteSelector=" RSN_SUITE "\n" | |
6fc6879b JM |
4414 | "hostapdWPAPTKState=%d\n" |
4415 | "hostapdWPAPTKGroupState=%d\n", | |
d1b1f9fa JM |
4416 | sm->wpa, |
4417 | RSN_SUITE_ARG(wpa_akm_to_suite(sm->wpa_key_mgmt)), | |
6fc6879b JM |
4418 | sm->wpa_ptk_state, |
4419 | sm->wpa_ptk_group_state); | |
d85e1fc8 | 4420 | if (os_snprintf_error(buflen - len, ret)) |
6fc6879b JM |
4421 | return len; |
4422 | len += ret; | |
4423 | ||
4424 | return len; | |
4425 | } | |
4426 | ||
4427 | ||
4428 | void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth) | |
4429 | { | |
4430 | if (wpa_auth) | |
4431 | wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++; | |
4432 | } | |
4433 | ||
4434 | ||
4435 | int wpa_auth_pairwise_set(struct wpa_state_machine *sm) | |
4436 | { | |
4437 | return sm && sm->pairwise_set; | |
4438 | } | |
4439 | ||
4440 | ||
ff36ff00 JM |
4441 | int wpa_auth_get_pairwise(struct wpa_state_machine *sm) |
4442 | { | |
4443 | return sm->pairwise; | |
4444 | } | |
4445 | ||
4446 | ||
b08c9ad0 MK |
4447 | const u8 * wpa_auth_get_pmk(struct wpa_state_machine *sm, int *len) |
4448 | { | |
4449 | if (!sm) | |
4450 | return NULL; | |
4451 | *len = sm->pmk_len; | |
4452 | return sm->PMK; | |
4453 | } | |
4454 | ||
4455 | ||
6fc6879b JM |
4456 | int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm) |
4457 | { | |
4458 | if (sm == NULL) | |
4459 | return -1; | |
4460 | return sm->wpa_key_mgmt; | |
4461 | } | |
4462 | ||
4463 | ||
4464 | int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm) | |
4465 | { | |
4466 | if (sm == NULL) | |
4467 | return 0; | |
4468 | return sm->wpa; | |
4469 | } | |
4470 | ||
4471 | ||
0e3bd7ac MV |
4472 | int wpa_auth_sta_ft_tk_already_set(struct wpa_state_machine *sm) |
4473 | { | |
4474 | if (!sm || !wpa_key_mgmt_ft(sm->wpa_key_mgmt)) | |
4475 | return 0; | |
4476 | return sm->tk_already_set; | |
4477 | } | |
4478 | ||
4479 | ||
2f1357fb JM |
4480 | int wpa_auth_sta_fils_tk_already_set(struct wpa_state_machine *sm) |
4481 | { | |
4482 | if (!sm || !wpa_key_mgmt_fils(sm->wpa_key_mgmt)) | |
4483 | return 0; | |
4484 | return sm->tk_already_set; | |
4485 | } | |
4486 | ||
4487 | ||
6fc6879b JM |
4488 | int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm, |
4489 | struct rsn_pmksa_cache_entry *entry) | |
4490 | { | |
4491 | if (sm == NULL || sm->pmksa != entry) | |
4492 | return -1; | |
4493 | sm->pmksa = NULL; | |
4494 | return 0; | |
4495 | } | |
4496 | ||
4497 | ||
4498 | struct rsn_pmksa_cache_entry * | |
4499 | wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm) | |
4500 | { | |
4501 | return sm ? sm->pmksa : NULL; | |
4502 | } | |
4503 | ||
4504 | ||
4505 | void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm) | |
4506 | { | |
4507 | if (sm) | |
4508 | sm->dot11RSNAStatsTKIPLocalMICFailures++; | |
4509 | } | |
4510 | ||
4511 | ||
4512 | const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len) | |
4513 | { | |
4514 | if (wpa_auth == NULL) | |
4515 | return NULL; | |
4516 | *len = wpa_auth->wpa_ie_len; | |
4517 | return wpa_auth->wpa_ie; | |
4518 | } | |
4519 | ||
4520 | ||
4521 | int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk, | |
207976f0 | 4522 | unsigned int pmk_len, |
6fc6879b JM |
4523 | int session_timeout, struct eapol_state_machine *eapol) |
4524 | { | |
cb465555 JM |
4525 | if (sm == NULL || sm->wpa != WPA_VERSION_WPA2 || |
4526 | sm->wpa_auth->conf.disable_pmksa_caching) | |
6fc6879b JM |
4527 | return -1; |
4528 | ||
64f48093 JM |
4529 | #ifdef CONFIG_IEEE80211R_AP |
4530 | if (pmk_len >= 2 * PMK_LEN && wpa_key_mgmt_ft(sm->wpa_key_mgmt) && | |
4531 | wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) && | |
4532 | !wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) { | |
4533 | /* Cache MPMK/XXKey instead of initial part from MSK */ | |
4534 | pmk = pmk + PMK_LEN; | |
4535 | pmk_len = PMK_LEN; | |
4536 | } else | |
4537 | #endif /* CONFIG_IEEE80211R_AP */ | |
834c5d68 | 4538 | if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) { |
207976f0 JM |
4539 | if (pmk_len > PMK_LEN_SUITE_B_192) |
4540 | pmk_len = PMK_LEN_SUITE_B_192; | |
4541 | } else if (pmk_len > PMK_LEN) { | |
4542 | pmk_len = PMK_LEN; | |
4543 | } | |
4544 | ||
64f48093 | 4545 | wpa_hexdump_key(MSG_DEBUG, "RSN: Cache PMK", pmk, pmk_len); |
70c93963 | 4546 | if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, pmk_len, NULL, |
98cd3d1c | 4547 | sm->PTK.kck, sm->PTK.kck_len, |
4bb081f1 JM |
4548 | sm->wpa_auth->addr, sm->addr, session_timeout, |
4549 | eapol, sm->wpa_key_mgmt)) | |
6fc6879b JM |
4550 | return 0; |
4551 | ||
4552 | return -1; | |
4553 | } | |
4554 | ||
4555 | ||
4556 | int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth, | |
4557 | const u8 *pmk, size_t len, const u8 *sta_addr, | |
4558 | int session_timeout, | |
4559 | struct eapol_state_machine *eapol) | |
4560 | { | |
4561 | if (wpa_auth == NULL) | |
4562 | return -1; | |
4563 | ||
64f48093 | 4564 | wpa_hexdump_key(MSG_DEBUG, "RSN: Cache PMK from preauth", pmk, len); |
70c93963 | 4565 | if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len, NULL, |
087a1f4e JM |
4566 | NULL, 0, |
4567 | wpa_auth->addr, | |
4bb081f1 JM |
4568 | sta_addr, session_timeout, eapol, |
4569 | WPA_KEY_MGMT_IEEE8021X)) | |
6fc6879b JM |
4570 | return 0; |
4571 | ||
4572 | return -1; | |
4573 | } | |
4574 | ||
4575 | ||
f2991170 | 4576 | int wpa_auth_pmksa_add_sae(struct wpa_authenticator *wpa_auth, const u8 *addr, |
70c93963 | 4577 | const u8 *pmk, const u8 *pmkid) |
f2991170 JM |
4578 | { |
4579 | if (wpa_auth->conf.disable_pmksa_caching) | |
4580 | return -1; | |
4581 | ||
64f48093 | 4582 | wpa_hexdump_key(MSG_DEBUG, "RSN: Cache PMK from SAE", pmk, PMK_LEN); |
70c93963 | 4583 | if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, PMK_LEN, pmkid, |
087a1f4e | 4584 | NULL, 0, |
f2991170 JM |
4585 | wpa_auth->addr, addr, 0, NULL, |
4586 | WPA_KEY_MGMT_SAE)) | |
4587 | return 0; | |
4588 | ||
4589 | return -1; | |
4590 | } | |
4591 | ||
4592 | ||
9d94e4bb JM |
4593 | void wpa_auth_add_sae_pmkid(struct wpa_state_machine *sm, const u8 *pmkid) |
4594 | { | |
4595 | os_memcpy(sm->pmkid, pmkid, PMKID_LEN); | |
4596 | sm->pmkid_set = 1; | |
4597 | } | |
4598 | ||
4599 | ||
0c52953b JM |
4600 | int wpa_auth_pmksa_add2(struct wpa_authenticator *wpa_auth, const u8 *addr, |
4601 | const u8 *pmk, size_t pmk_len, const u8 *pmkid, | |
4602 | int session_timeout, int akmp) | |
4603 | { | |
4604 | if (wpa_auth->conf.disable_pmksa_caching) | |
4605 | return -1; | |
4606 | ||
64f48093 | 4607 | wpa_hexdump_key(MSG_DEBUG, "RSN: Cache PMK (2)", pmk, PMK_LEN); |
0c52953b JM |
4608 | if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, pmk_len, pmkid, |
4609 | NULL, 0, wpa_auth->addr, addr, session_timeout, | |
4610 | NULL, akmp)) | |
4611 | return 0; | |
4612 | ||
4613 | return -1; | |
4614 | } | |
4615 | ||
4616 | ||
901d1fe1 JM |
4617 | void wpa_auth_pmksa_remove(struct wpa_authenticator *wpa_auth, |
4618 | const u8 *sta_addr) | |
4619 | { | |
4620 | struct rsn_pmksa_cache_entry *pmksa; | |
4621 | ||
4622 | if (wpa_auth == NULL || wpa_auth->pmksa == NULL) | |
4623 | return; | |
4624 | pmksa = pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, NULL); | |
4625 | if (pmksa) { | |
4626 | wpa_printf(MSG_DEBUG, "WPA: Remove PMKSA cache entry for " | |
4627 | MACSTR " based on request", MAC2STR(sta_addr)); | |
4628 | pmksa_cache_free_entry(wpa_auth->pmksa, pmksa); | |
4629 | } | |
4630 | } | |
4631 | ||
4632 | ||
b8daac18 MH |
4633 | int wpa_auth_pmksa_list(struct wpa_authenticator *wpa_auth, char *buf, |
4634 | size_t len) | |
4635 | { | |
4636 | if (!wpa_auth || !wpa_auth->pmksa) | |
4637 | return 0; | |
4638 | return pmksa_cache_auth_list(wpa_auth->pmksa, buf, len); | |
4639 | } | |
4640 | ||
4641 | ||
4c522c77 MH |
4642 | void wpa_auth_pmksa_flush(struct wpa_authenticator *wpa_auth) |
4643 | { | |
4644 | if (wpa_auth && wpa_auth->pmksa) | |
4645 | pmksa_cache_auth_flush(wpa_auth->pmksa); | |
4646 | } | |
4647 | ||
4648 | ||
4d77d80e MH |
4649 | #ifdef CONFIG_PMKSA_CACHE_EXTERNAL |
4650 | #ifdef CONFIG_MESH | |
4651 | ||
4652 | int wpa_auth_pmksa_list_mesh(struct wpa_authenticator *wpa_auth, const u8 *addr, | |
4653 | char *buf, size_t len) | |
4654 | { | |
4655 | if (!wpa_auth || !wpa_auth->pmksa) | |
4656 | return 0; | |
4657 | ||
4658 | return pmksa_cache_auth_list_mesh(wpa_auth->pmksa, addr, buf, len); | |
4659 | } | |
4660 | ||
4661 | ||
4662 | struct rsn_pmksa_cache_entry * | |
4663 | wpa_auth_pmksa_create_entry(const u8 *aa, const u8 *spa, const u8 *pmk, | |
4664 | const u8 *pmkid, int expiration) | |
4665 | { | |
4666 | struct rsn_pmksa_cache_entry *entry; | |
4667 | struct os_reltime now; | |
4668 | ||
4669 | entry = pmksa_cache_auth_create_entry(pmk, PMK_LEN, pmkid, NULL, 0, aa, | |
4670 | spa, 0, NULL, WPA_KEY_MGMT_SAE); | |
4671 | if (!entry) | |
4672 | return NULL; | |
4673 | ||
4674 | os_get_reltime(&now); | |
4675 | entry->expiration = now.sec + expiration; | |
4676 | return entry; | |
4677 | } | |
4678 | ||
4679 | ||
4680 | int wpa_auth_pmksa_add_entry(struct wpa_authenticator *wpa_auth, | |
4681 | struct rsn_pmksa_cache_entry *entry) | |
4682 | { | |
4683 | int ret; | |
4684 | ||
4685 | if (!wpa_auth || !wpa_auth->pmksa) | |
4686 | return -1; | |
4687 | ||
4688 | ret = pmksa_cache_auth_add_entry(wpa_auth->pmksa, entry); | |
4689 | if (ret < 0) | |
4690 | wpa_printf(MSG_DEBUG, | |
4691 | "RSN: Failed to store external PMKSA cache for " | |
4692 | MACSTR, MAC2STR(entry->spa)); | |
4693 | ||
4694 | return ret; | |
4695 | } | |
4696 | ||
4697 | #endif /* CONFIG_MESH */ | |
4698 | #endif /* CONFIG_PMKSA_CACHE_EXTERNAL */ | |
4699 | ||
4700 | ||
9f2cf23e | 4701 | struct rsn_pmksa_cache_entry * |
c1bd4bac JM |
4702 | wpa_auth_pmksa_get(struct wpa_authenticator *wpa_auth, const u8 *sta_addr, |
4703 | const u8 *pmkid) | |
9f2cf23e MH |
4704 | { |
4705 | if (!wpa_auth || !wpa_auth->pmksa) | |
4706 | return NULL; | |
c1bd4bac | 4707 | return pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, pmkid); |
9f2cf23e MH |
4708 | } |
4709 | ||
4710 | ||
4711 | void wpa_auth_pmksa_set_to_sm(struct rsn_pmksa_cache_entry *pmksa, | |
4712 | struct wpa_state_machine *sm, | |
4713 | struct wpa_authenticator *wpa_auth, | |
4714 | u8 *pmkid, u8 *pmk) | |
4715 | { | |
4716 | if (!sm) | |
4717 | return; | |
4718 | ||
4719 | sm->pmksa = pmksa; | |
8854f90b JM |
4720 | os_memcpy(pmk, pmksa->pmk, PMK_LEN); |
4721 | os_memcpy(pmkid, pmksa->pmkid, PMKID_LEN); | |
4722 | os_memcpy(wpa_auth->dot11RSNAPMKIDUsed, pmksa->pmkid, PMKID_LEN); | |
9f2cf23e MH |
4723 | } |
4724 | ||
4725 | ||
a0ad9e8c MB |
4726 | /* |
4727 | * Remove and free the group from wpa_authenticator. This is triggered by a | |
4728 | * callback to make sure nobody is currently iterating the group list while it | |
4729 | * gets modified. | |
4730 | */ | |
4731 | static void wpa_group_free(struct wpa_authenticator *wpa_auth, | |
4732 | struct wpa_group *group) | |
4733 | { | |
4734 | struct wpa_group *prev = wpa_auth->group; | |
4735 | ||
4736 | wpa_printf(MSG_DEBUG, "WPA: Remove group state machine for VLAN-ID %d", | |
4737 | group->vlan_id); | |
4738 | ||
4739 | while (prev) { | |
4740 | if (prev->next == group) { | |
4741 | /* This never frees the special first group as needed */ | |
4742 | prev->next = group->next; | |
4743 | os_free(group); | |
4744 | break; | |
4745 | } | |
4746 | prev = prev->next; | |
4747 | } | |
4748 | ||
4749 | } | |
4750 | ||
4751 | ||
4752 | /* Increase the reference counter for group */ | |
4753 | static void wpa_group_get(struct wpa_authenticator *wpa_auth, | |
4754 | struct wpa_group *group) | |
4755 | { | |
4756 | /* Skip the special first group */ | |
4757 | if (wpa_auth->group == group) | |
4758 | return; | |
4759 | ||
4760 | group->references++; | |
4761 | } | |
4762 | ||
4763 | ||
4764 | /* Decrease the reference counter and maybe free the group */ | |
4765 | static void wpa_group_put(struct wpa_authenticator *wpa_auth, | |
4766 | struct wpa_group *group) | |
4767 | { | |
4768 | /* Skip the special first group */ | |
4769 | if (wpa_auth->group == group) | |
4770 | return; | |
4771 | ||
4772 | group->references--; | |
4773 | if (group->references) | |
4774 | return; | |
4775 | wpa_group_free(wpa_auth, group); | |
4776 | } | |
4777 | ||
4778 | ||
4779 | /* | |
4780 | * Add a group that has its references counter set to zero. Caller needs to | |
4781 | * call wpa_group_get() on the return value to mark the entry in use. | |
4782 | */ | |
6fc6879b JM |
4783 | static struct wpa_group * |
4784 | wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id) | |
4785 | { | |
4786 | struct wpa_group *group; | |
4787 | ||
4788 | if (wpa_auth == NULL || wpa_auth->group == NULL) | |
4789 | return NULL; | |
4790 | ||
4791 | wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d", | |
4792 | vlan_id); | |
bdffdc5d | 4793 | group = wpa_group_init(wpa_auth, vlan_id, 0); |
6fc6879b JM |
4794 | if (group == NULL) |
4795 | return NULL; | |
4796 | ||
4797 | group->next = wpa_auth->group->next; | |
4798 | wpa_auth->group->next = group; | |
4799 | ||
4800 | return group; | |
4801 | } | |
4802 | ||
4803 | ||
7cebc8e2 MB |
4804 | /* |
4805 | * Enforce that the group state machine for the VLAN is running, increase | |
4806 | * reference counter as interface is up. References might have been increased | |
4807 | * even if a negative value is returned. | |
4808 | * Returns: -1 on error (group missing, group already failed); otherwise, 0 | |
4809 | */ | |
4810 | int wpa_auth_ensure_group(struct wpa_authenticator *wpa_auth, int vlan_id) | |
4811 | { | |
4812 | struct wpa_group *group; | |
4813 | ||
4814 | if (wpa_auth == NULL) | |
4815 | return 0; | |
4816 | ||
4817 | group = wpa_auth->group; | |
4818 | while (group) { | |
4819 | if (group->vlan_id == vlan_id) | |
4820 | break; | |
4821 | group = group->next; | |
4822 | } | |
4823 | ||
4824 | if (group == NULL) { | |
4825 | group = wpa_auth_add_group(wpa_auth, vlan_id); | |
4826 | if (group == NULL) | |
4827 | return -1; | |
4828 | } | |
4829 | ||
4830 | wpa_printf(MSG_DEBUG, | |
4831 | "WPA: Ensure group state machine running for VLAN ID %d", | |
4832 | vlan_id); | |
4833 | ||
4834 | wpa_group_get(wpa_auth, group); | |
4835 | group->num_setup_iface++; | |
4836 | ||
4837 | if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) | |
4838 | return -1; | |
4839 | ||
4840 | return 0; | |
4841 | } | |
4842 | ||
4843 | ||
4844 | /* | |
4845 | * Decrease reference counter, expected to be zero afterwards. | |
4846 | * returns: -1 on error (group not found, group in fail state) | |
4847 | * -2 if wpa_group is still referenced | |
4848 | * 0 else | |
4849 | */ | |
4850 | int wpa_auth_release_group(struct wpa_authenticator *wpa_auth, int vlan_id) | |
4851 | { | |
4852 | struct wpa_group *group; | |
4853 | int ret = 0; | |
4854 | ||
4855 | if (wpa_auth == NULL) | |
4856 | return 0; | |
4857 | ||
4858 | group = wpa_auth->group; | |
4859 | while (group) { | |
4860 | if (group->vlan_id == vlan_id) | |
4861 | break; | |
4862 | group = group->next; | |
4863 | } | |
4864 | ||
4865 | if (group == NULL) | |
4866 | return -1; | |
4867 | ||
4868 | wpa_printf(MSG_DEBUG, | |
4869 | "WPA: Try stopping group state machine for VLAN ID %d", | |
4870 | vlan_id); | |
4871 | ||
4872 | if (group->num_setup_iface <= 0) { | |
4873 | wpa_printf(MSG_ERROR, | |
4874 | "WPA: wpa_auth_release_group called more often than wpa_auth_ensure_group for VLAN ID %d, skipping.", | |
4875 | vlan_id); | |
4876 | return -1; | |
4877 | } | |
4878 | group->num_setup_iface--; | |
4879 | ||
4880 | if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) | |
4881 | ret = -1; | |
4882 | ||
4883 | if (group->references > 1) { | |
4884 | wpa_printf(MSG_DEBUG, | |
4885 | "WPA: Cannot stop group state machine for VLAN ID %d as references are still hold", | |
4886 | vlan_id); | |
4887 | ret = -2; | |
4888 | } | |
4889 | ||
4890 | wpa_group_put(wpa_auth, group); | |
4891 | ||
4892 | return ret; | |
4893 | } | |
4894 | ||
4895 | ||
6fc6879b JM |
4896 | int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id) |
4897 | { | |
4898 | struct wpa_group *group; | |
4899 | ||
4900 | if (sm == NULL || sm->wpa_auth == NULL) | |
4901 | return 0; | |
4902 | ||
4903 | group = sm->wpa_auth->group; | |
4904 | while (group) { | |
4905 | if (group->vlan_id == vlan_id) | |
4906 | break; | |
4907 | group = group->next; | |
4908 | } | |
4909 | ||
4910 | if (group == NULL) { | |
4911 | group = wpa_auth_add_group(sm->wpa_auth, vlan_id); | |
4912 | if (group == NULL) | |
4913 | return -1; | |
4914 | } | |
4915 | ||
4916 | if (sm->group == group) | |
4917 | return 0; | |
4918 | ||
7d7f7be2 JM |
4919 | if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) |
4920 | return -1; | |
4921 | ||
6fc6879b JM |
4922 | wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state " |
4923 | "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id); | |
4924 | ||
a0ad9e8c MB |
4925 | wpa_group_get(sm->wpa_auth, group); |
4926 | wpa_group_put(sm->wpa_auth, sm->group); | |
6fc6879b | 4927 | sm->group = group; |
a0ad9e8c | 4928 | |
6fc6879b JM |
4929 | return 0; |
4930 | } | |
e4bf4db9 JM |
4931 | |
4932 | ||
4933 | void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth, | |
4934 | struct wpa_state_machine *sm, int ack) | |
4935 | { | |
4936 | if (wpa_auth == NULL || sm == NULL) | |
4937 | return; | |
4938 | wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key TX status for STA " MACSTR | |
4939 | " ack=%d", MAC2STR(sm->addr), ack); | |
4940 | if (sm->pending_1_of_4_timeout && ack) { | |
4941 | /* | |
4942 | * Some deployed supplicant implementations update their SNonce | |
4943 | * for each EAPOL-Key 2/4 message even within the same 4-way | |
4944 | * handshake and then fail to use the first SNonce when | |
4945 | * deriving the PTK. This results in unsuccessful 4-way | |
4946 | * handshake whenever the relatively short initial timeout is | |
4947 | * reached and EAPOL-Key 1/4 is retransmitted. Try to work | |
4948 | * around this by increasing the timeout now that we know that | |
4949 | * the station has received the frame. | |
4950 | */ | |
4951 | int timeout_ms = eapol_key_timeout_subseq; | |
4952 | wpa_printf(MSG_DEBUG, "WPA: Increase initial EAPOL-Key 1/4 " | |
4953 | "timeout by %u ms because of acknowledged frame", | |
4954 | timeout_ms); | |
4955 | eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm); | |
4956 | eloop_register_timeout(timeout_ms / 1000, | |
4957 | (timeout_ms % 1000) * 1000, | |
4958 | wpa_send_eapol_timeout, wpa_auth, sm); | |
4959 | } | |
3d695328 JM |
4960 | |
4961 | #ifdef CONFIG_TESTING_OPTIONS | |
4962 | if (sm->eapol_status_cb) { | |
4963 | sm->eapol_status_cb(sm->eapol_status_cb_ctx1, | |
4964 | sm->eapol_status_cb_ctx2); | |
4965 | sm->eapol_status_cb = NULL; | |
4966 | } | |
4967 | #endif /* CONFIG_TESTING_OPTIONS */ | |
e4bf4db9 | 4968 | } |
c10347f2 JM |
4969 | |
4970 | ||
4971 | int wpa_auth_uses_sae(struct wpa_state_machine *sm) | |
4972 | { | |
4973 | if (sm == NULL) | |
4974 | return 0; | |
4975 | return wpa_key_mgmt_sae(sm->wpa_key_mgmt); | |
4976 | } | |
aa189ac9 JM |
4977 | |
4978 | ||
4979 | int wpa_auth_uses_ft_sae(struct wpa_state_machine *sm) | |
4980 | { | |
4981 | if (sm == NULL) | |
4982 | return 0; | |
4983 | return sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_SAE; | |
4984 | } | |
25ef8529 JM |
4985 | |
4986 | ||
4987 | #ifdef CONFIG_P2P | |
4988 | int wpa_auth_get_ip_addr(struct wpa_state_machine *sm, u8 *addr) | |
4989 | { | |
4990 | if (sm == NULL || WPA_GET_BE32(sm->ip_addr) == 0) | |
4991 | return -1; | |
4992 | os_memcpy(addr, sm->ip_addr, 4); | |
4993 | return 0; | |
4994 | } | |
4995 | #endif /* CONFIG_P2P */ | |
cbc210de JM |
4996 | |
4997 | ||
4998 | int wpa_auth_radius_das_disconnect_pmksa(struct wpa_authenticator *wpa_auth, | |
4999 | struct radius_das_attrs *attr) | |
5000 | { | |
5001 | return pmksa_cache_auth_radius_das_disconnect(wpa_auth->pmksa, attr); | |
5002 | } | |
34782730 JM |
5003 | |
5004 | ||
5005 | void wpa_auth_reconfig_group_keys(struct wpa_authenticator *wpa_auth) | |
5006 | { | |
5007 | struct wpa_group *group; | |
5008 | ||
5009 | if (!wpa_auth) | |
5010 | return; | |
5011 | for (group = wpa_auth->group; group; group = group->next) | |
5012 | wpa_group_config_group_keys(wpa_auth, group); | |
5013 | } | |
7eace378 JM |
5014 | |
5015 | ||
5016 | #ifdef CONFIG_FILS | |
5017 | ||
5018 | struct wpa_auth_fils_iter_data { | |
5019 | struct wpa_authenticator *auth; | |
5020 | const u8 *cache_id; | |
5021 | struct rsn_pmksa_cache_entry *pmksa; | |
5022 | const u8 *spa; | |
5023 | const u8 *pmkid; | |
5024 | }; | |
5025 | ||
5026 | ||
5027 | static int wpa_auth_fils_iter(struct wpa_authenticator *a, void *ctx) | |
5028 | { | |
5029 | struct wpa_auth_fils_iter_data *data = ctx; | |
5030 | ||
4cc6574d | 5031 | if (a == data->auth || !a->conf.fils_cache_id_set || |
7eace378 JM |
5032 | os_memcmp(a->conf.fils_cache_id, data->cache_id, |
5033 | FILS_CACHE_ID_LEN) != 0) | |
5034 | return 0; | |
5035 | data->pmksa = pmksa_cache_auth_get(a->pmksa, data->spa, data->pmkid); | |
5036 | return data->pmksa != NULL; | |
5037 | } | |
5038 | ||
5039 | ||
5040 | struct rsn_pmksa_cache_entry * | |
5041 | wpa_auth_pmksa_get_fils_cache_id(struct wpa_authenticator *wpa_auth, | |
5042 | const u8 *sta_addr, const u8 *pmkid) | |
5043 | { | |
5044 | struct wpa_auth_fils_iter_data idata; | |
5045 | ||
5046 | if (!wpa_auth->conf.fils_cache_id_set) | |
5047 | return NULL; | |
5048 | idata.auth = wpa_auth; | |
5049 | idata.cache_id = wpa_auth->conf.fils_cache_id; | |
5050 | idata.pmksa = NULL; | |
5051 | idata.spa = sta_addr; | |
5052 | idata.pmkid = pmkid; | |
5053 | wpa_auth_for_each_auth(wpa_auth, wpa_auth_fils_iter, &idata); | |
5054 | return idata.pmksa; | |
5055 | } | |
5056 | ||
5db997e3 JM |
5057 | |
5058 | #ifdef CONFIG_IEEE80211R_AP | |
a7968ea5 JM |
5059 | int wpa_auth_write_fte(struct wpa_authenticator *wpa_auth, int use_sha384, |
5060 | u8 *buf, size_t len) | |
5db997e3 JM |
5061 | { |
5062 | struct wpa_auth_config *conf = &wpa_auth->conf; | |
5063 | ||
a7968ea5 | 5064 | return wpa_write_ftie(conf, use_sha384, conf->r0_key_holder, |
5db997e3 JM |
5065 | conf->r0_key_holder_len, |
5066 | NULL, NULL, buf, len, NULL, 0); | |
5067 | } | |
5068 | #endif /* CONFIG_IEEE80211R_AP */ | |
5069 | ||
8acbf85f JM |
5070 | |
5071 | void wpa_auth_get_fils_aead_params(struct wpa_state_machine *sm, | |
5072 | u8 *fils_anonce, u8 *fils_snonce, | |
5073 | u8 *fils_kek, size_t *fils_kek_len) | |
5074 | { | |
5075 | os_memcpy(fils_anonce, sm->ANonce, WPA_NONCE_LEN); | |
5076 | os_memcpy(fils_snonce, sm->SNonce, WPA_NONCE_LEN); | |
5077 | os_memcpy(fils_kek, sm->PTK.kek, WPA_KEK_MAX_LEN); | |
5078 | *fils_kek_len = sm->PTK.kek_len; | |
5079 | } | |
5080 | ||
a40bd06e JM |
5081 | |
5082 | void wpa_auth_add_fils_pmk_pmkid(struct wpa_state_machine *sm, const u8 *pmk, | |
5083 | size_t pmk_len, const u8 *pmkid) | |
5084 | { | |
5085 | os_memcpy(sm->PMK, pmk, pmk_len); | |
5086 | sm->pmk_len = pmk_len; | |
5087 | os_memcpy(sm->pmkid, pmkid, PMKID_LEN); | |
5088 | sm->pmkid_set = 1; | |
5089 | } | |
5090 | ||
7eace378 | 5091 | #endif /* CONFIG_FILS */ |
6bc2f00f JM |
5092 | |
5093 | ||
36536639 JM |
5094 | void wpa_auth_set_auth_alg(struct wpa_state_machine *sm, u16 auth_alg) |
5095 | { | |
5096 | if (sm) | |
5097 | sm->auth_alg = auth_alg; | |
5098 | } | |
5099 | ||
5100 | ||
10ec6a5f JM |
5101 | #ifdef CONFIG_DPP2 |
5102 | void wpa_auth_set_dpp_z(struct wpa_state_machine *sm, const struct wpabuf *z) | |
5103 | { | |
5104 | if (sm) { | |
5105 | wpabuf_clear_free(sm->dpp_z); | |
5106 | sm->dpp_z = z ? wpabuf_dup(z) : NULL; | |
5107 | } | |
5108 | } | |
5109 | #endif /* CONFIG_DPP2 */ | |
5110 | ||
5111 | ||
82424732 | 5112 | #ifdef CONFIG_TESTING_OPTIONS |
d8afdb21 | 5113 | |
3d695328 JM |
5114 | int wpa_auth_resend_m1(struct wpa_state_machine *sm, int change_anonce, |
5115 | void (*cb)(void *ctx1, void *ctx2), | |
5116 | void *ctx1, void *ctx2) | |
d8afdb21 JM |
5117 | { |
5118 | const u8 *anonce = sm->ANonce; | |
5119 | u8 anonce_buf[WPA_NONCE_LEN]; | |
5120 | ||
5121 | if (change_anonce) { | |
5122 | if (random_get_bytes(anonce_buf, WPA_NONCE_LEN)) | |
5123 | return -1; | |
5124 | anonce = anonce_buf; | |
5125 | } | |
5126 | ||
5127 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
5128 | "sending 1/4 msg of 4-Way Handshake (TESTING)"); | |
5129 | wpa_send_eapol(sm->wpa_auth, sm, | |
5130 | WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL, | |
5131 | anonce, NULL, 0, 0, 0); | |
5132 | return 0; | |
5133 | } | |
5134 | ||
5135 | ||
3d695328 JM |
5136 | int wpa_auth_resend_m3(struct wpa_state_machine *sm, |
5137 | void (*cb)(void *ctx1, void *ctx2), | |
5138 | void *ctx1, void *ctx2) | |
d8afdb21 | 5139 | { |
0c3bc1be | 5140 | u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos; |
0c3bc1be | 5141 | u8 *opos; |
d8afdb21 JM |
5142 | size_t gtk_len, kde_len; |
5143 | struct wpa_group *gsm = sm->group; | |
5144 | u8 *wpa_ie; | |
7a4b01c8 | 5145 | int wpa_ie_len, secure, gtkidx, encr = 0; |
d8afdb21 JM |
5146 | |
5147 | /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE], | |
16889aff | 5148 | GTK[GN], IGTK, [BIGTK], [FTIE], [TIE * 2]) |
d8afdb21 JM |
5149 | */ |
5150 | ||
5151 | /* Use 0 RSC */ | |
5152 | os_memset(rsc, 0, WPA_KEY_RSC_LEN); | |
5153 | /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */ | |
5154 | wpa_ie = sm->wpa_auth->wpa_ie; | |
5155 | wpa_ie_len = sm->wpa_auth->wpa_ie_len; | |
5156 | if (sm->wpa == WPA_VERSION_WPA && | |
5157 | (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) && | |
5158 | wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) { | |
5159 | /* WPA-only STA, remove RSN IE and possible MDIE */ | |
5160 | wpa_ie = wpa_ie + wpa_ie[1] + 2; | |
5161 | if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN) | |
5162 | wpa_ie = wpa_ie + wpa_ie[1] + 2; | |
5163 | wpa_ie_len = wpa_ie[1] + 2; | |
5164 | } | |
5165 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
5166 | "sending 3/4 msg of 4-Way Handshake (TESTING)"); | |
5167 | if (sm->wpa == WPA_VERSION_WPA2) { | |
5168 | /* WPA2 send GTK in the 4-way handshake */ | |
5169 | secure = 1; | |
5170 | gtk = gsm->GTK[gsm->GN - 1]; | |
5171 | gtk_len = gsm->GTK_len; | |
7a4b01c8 | 5172 | gtkidx = gsm->GN; |
d8afdb21 JM |
5173 | _rsc = rsc; |
5174 | encr = 1; | |
5175 | } else { | |
5176 | /* WPA does not include GTK in msg 3/4 */ | |
5177 | secure = 0; | |
5178 | gtk = NULL; | |
5179 | gtk_len = 0; | |
d8afdb21 JM |
5180 | _rsc = NULL; |
5181 | if (sm->rx_eapol_key_secure) { | |
5182 | /* | |
5183 | * It looks like Windows 7 supplicant tries to use | |
5184 | * Secure bit in msg 2/4 after having reported Michael | |
5185 | * MIC failure and it then rejects the 4-way handshake | |
5186 | * if msg 3/4 does not set Secure bit. Work around this | |
5187 | * by setting the Secure bit here even in the case of | |
5188 | * WPA if the supplicant used it first. | |
5189 | */ | |
5190 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
5191 | "STA used Secure bit in WPA msg 2/4 - " | |
5192 | "set Secure for 3/4 as workaround"); | |
5193 | secure = 1; | |
5194 | } | |
5195 | } | |
5196 | ||
17c2559c | 5197 | kde_len = wpa_ie_len + ieee80211w_kde_len(sm) + ocv_oci_len(sm); |
d8afdb21 JM |
5198 | if (gtk) |
5199 | kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len; | |
5200 | #ifdef CONFIG_IEEE80211R_AP | |
5201 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { | |
5202 | kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */ | |
5203 | kde_len += 300; /* FTIE + 2 * TIE */ | |
5204 | } | |
5205 | #endif /* CONFIG_IEEE80211R_AP */ | |
5206 | kde = os_malloc(kde_len); | |
5207 | if (kde == NULL) | |
5208 | return -1; | |
5209 | ||
5210 | pos = kde; | |
5211 | os_memcpy(pos, wpa_ie, wpa_ie_len); | |
5212 | pos += wpa_ie_len; | |
5213 | #ifdef CONFIG_IEEE80211R_AP | |
5214 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { | |
5215 | int res; | |
5216 | size_t elen; | |
5217 | ||
5218 | elen = pos - kde; | |
5219 | res = wpa_insert_pmkid(kde, &elen, sm->pmk_r1_name); | |
5220 | if (res < 0) { | |
5221 | wpa_printf(MSG_ERROR, "FT: Failed to insert " | |
5222 | "PMKR1Name into RSN IE in EAPOL-Key data"); | |
5223 | os_free(kde); | |
5224 | return -1; | |
5225 | } | |
5226 | pos -= wpa_ie_len; | |
5227 | pos += elen; | |
5228 | } | |
5229 | #endif /* CONFIG_IEEE80211R_AP */ | |
5230 | if (gtk) { | |
5231 | u8 hdr[2]; | |
7a4b01c8 | 5232 | hdr[0] = gtkidx & 0x03; |
d8afdb21 JM |
5233 | hdr[1] = 0; |
5234 | pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2, | |
5235 | gtk, gtk_len); | |
5236 | } | |
5237 | opos = pos; | |
5238 | pos = ieee80211w_kde_add(sm, pos); | |
9f917339 MV |
5239 | if (pos - opos >= 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN) { |
5240 | /* skip KDE header and keyid */ | |
5241 | opos += 2 + RSN_SELECTOR_LEN + 2; | |
d8afdb21 JM |
5242 | os_memset(opos, 0, 6); /* clear PN */ |
5243 | } | |
17c2559c MV |
5244 | if (ocv_oci_add(sm, &pos) < 0) { |
5245 | os_free(kde); | |
5246 | return -1; | |
5247 | } | |
d8afdb21 JM |
5248 | |
5249 | #ifdef CONFIG_IEEE80211R_AP | |
5250 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { | |
5251 | int res; | |
5252 | struct wpa_auth_config *conf; | |
5253 | ||
5254 | conf = &sm->wpa_auth->conf; | |
5255 | if (sm->assoc_resp_ftie && | |
5256 | kde + kde_len - pos >= 2 + sm->assoc_resp_ftie[1]) { | |
5257 | os_memcpy(pos, sm->assoc_resp_ftie, | |
5258 | 2 + sm->assoc_resp_ftie[1]); | |
5259 | res = 2 + sm->assoc_resp_ftie[1]; | |
5260 | } else { | |
a7968ea5 JM |
5261 | int use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt); |
5262 | ||
5263 | res = wpa_write_ftie(conf, use_sha384, | |
5264 | conf->r0_key_holder, | |
d8afdb21 JM |
5265 | conf->r0_key_holder_len, |
5266 | NULL, NULL, pos, | |
5267 | kde + kde_len - pos, | |
5268 | NULL, 0); | |
5269 | } | |
5270 | if (res < 0) { | |
5271 | wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE " | |
5272 | "into EAPOL-Key Key Data"); | |
5273 | os_free(kde); | |
5274 | return -1; | |
5275 | } | |
5276 | pos += res; | |
5277 | ||
5278 | /* TIE[ReassociationDeadline] (TU) */ | |
5279 | *pos++ = WLAN_EID_TIMEOUT_INTERVAL; | |
5280 | *pos++ = 5; | |
5281 | *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE; | |
5282 | WPA_PUT_LE32(pos, conf->reassociation_deadline); | |
5283 | pos += 4; | |
5284 | ||
5285 | /* TIE[KeyLifetime] (seconds) */ | |
5286 | *pos++ = WLAN_EID_TIMEOUT_INTERVAL; | |
5287 | *pos++ = 5; | |
5288 | *pos++ = WLAN_TIMEOUT_KEY_LIFETIME; | |
83fe4bd3 | 5289 | WPA_PUT_LE32(pos, conf->r0_key_lifetime); |
d8afdb21 JM |
5290 | pos += 4; |
5291 | } | |
5292 | #endif /* CONFIG_IEEE80211R_AP */ | |
5293 | ||
5294 | wpa_send_eapol(sm->wpa_auth, sm, | |
5295 | (secure ? WPA_KEY_INFO_SECURE : 0) | | |
5296 | (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ? | |
5297 | WPA_KEY_INFO_MIC : 0) | | |
5298 | WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL | | |
5299 | WPA_KEY_INFO_KEY_TYPE, | |
7a4b01c8 | 5300 | _rsc, sm->ANonce, kde, pos - kde, 0, encr); |
d8afdb21 JM |
5301 | os_free(kde); |
5302 | return 0; | |
5303 | } | |
5304 | ||
5305 | ||
3d695328 JM |
5306 | int wpa_auth_resend_group_m1(struct wpa_state_machine *sm, |
5307 | void (*cb)(void *ctx1, void *ctx2), | |
5308 | void *ctx1, void *ctx2) | |
6bc2f00f JM |
5309 | { |
5310 | u8 rsc[WPA_KEY_RSC_LEN]; | |
5311 | struct wpa_group *gsm = sm->group; | |
5312 | const u8 *kde; | |
0c3bc1be | 5313 | u8 *kde_buf = NULL, *pos, hdr[2]; |
0c3bc1be | 5314 | u8 *opos; |
6bc2f00f JM |
5315 | size_t kde_len; |
5316 | u8 *gtk; | |
5317 | ||
5318 | /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */ | |
5319 | os_memset(rsc, 0, WPA_KEY_RSC_LEN); | |
5320 | /* Use 0 RSC */ | |
5321 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
5322 | "sending 1/2 msg of Group Key Handshake (TESTING)"); | |
5323 | ||
5324 | gtk = gsm->GTK[gsm->GN - 1]; | |
5325 | if (sm->wpa == WPA_VERSION_WPA2) { | |
5326 | kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len + | |
17c2559c | 5327 | ieee80211w_kde_len(sm) + ocv_oci_len(sm); |
6bc2f00f JM |
5328 | kde_buf = os_malloc(kde_len); |
5329 | if (kde_buf == NULL) | |
5330 | return -1; | |
5331 | ||
5332 | kde = pos = kde_buf; | |
5333 | hdr[0] = gsm->GN & 0x03; | |
5334 | hdr[1] = 0; | |
5335 | pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2, | |
5336 | gtk, gsm->GTK_len); | |
5337 | opos = pos; | |
5338 | pos = ieee80211w_kde_add(sm, pos); | |
9f917339 MV |
5339 | if (pos - opos >= |
5340 | 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN) { | |
5341 | /* skip KDE header and keyid */ | |
5342 | opos += 2 + RSN_SELECTOR_LEN + 2; | |
6bc2f00f JM |
5343 | os_memset(opos, 0, 6); /* clear PN */ |
5344 | } | |
17c2559c MV |
5345 | if (ocv_oci_add(sm, &pos) < 0) { |
5346 | os_free(kde_buf); | |
5347 | return -1; | |
5348 | } | |
6bc2f00f JM |
5349 | kde_len = pos - kde; |
5350 | } else { | |
5351 | kde = gtk; | |
5352 | kde_len = gsm->GTK_len; | |
5353 | } | |
5354 | ||
3d695328 JM |
5355 | sm->eapol_status_cb = cb; |
5356 | sm->eapol_status_cb_ctx1 = ctx1; | |
5357 | sm->eapol_status_cb_ctx2 = ctx2; | |
5358 | ||
6bc2f00f JM |
5359 | wpa_send_eapol(sm->wpa_auth, sm, |
5360 | WPA_KEY_INFO_SECURE | | |
5361 | (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ? | |
5362 | WPA_KEY_INFO_MIC : 0) | | |
5363 | WPA_KEY_INFO_ACK | | |
5364 | (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0), | |
5365 | rsc, NULL, kde, kde_len, gsm->GN, 1); | |
5366 | ||
5367 | os_free(kde_buf); | |
5368 | return 0; | |
5369 | } | |
d8afdb21 | 5370 | |
92662fb2 JB |
5371 | |
5372 | int wpa_auth_rekey_gtk(struct wpa_authenticator *wpa_auth) | |
5373 | { | |
5374 | if (!wpa_auth) | |
5375 | return -1; | |
5376 | eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL); | |
5377 | return eloop_register_timeout(0, 0, wpa_rekey_gtk, wpa_auth, NULL); | |
5378 | } | |
5379 | ||
6bc2f00f | 5380 | #endif /* CONFIG_TESTING_OPTIONS */ |