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Commit | Line | Data |
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6fc6879b JM |
1 | /* |
2 | * hostapd - IEEE 802.11r - Fast BSS Transition | |
98cd3d1c | 3 | * Copyright (c) 2004-2015, Jouni Malinen <j@w1.fi> |
6fc6879b | 4 | * |
0f3d578e JM |
5 | * This software may be distributed under the terms of the BSD license. |
6 | * See README for more details. | |
6fc6879b JM |
7 | */ |
8 | ||
6226e38d | 9 | #include "utils/includes.h" |
6fc6879b | 10 | |
6226e38d | 11 | #include "utils/common.h" |
692ec305 | 12 | #include "utils/eloop.h" |
76967603 | 13 | #include "utils/list.h" |
81f4f619 JM |
14 | #include "common/ieee802_11_defs.h" |
15 | #include "common/ieee802_11_common.h" | |
03da66bd | 16 | #include "crypto/aes_wrap.h" |
3642c431 | 17 | #include "crypto/random.h" |
6226e38d | 18 | #include "ap_config.h" |
6fc6879b | 19 | #include "ieee802_11.h" |
1057d78e | 20 | #include "wmm.h" |
6226e38d | 21 | #include "wpa_auth.h" |
6fc6879b | 22 | #include "wpa_auth_i.h" |
6fc6879b JM |
23 | |
24 | ||
4ec1fd8e | 25 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b | 26 | |
692ec305 JM |
27 | static int wpa_ft_send_rrb_auth_resp(struct wpa_state_machine *sm, |
28 | const u8 *current_ap, const u8 *sta_addr, | |
29 | u16 status, const u8 *resp_ies, | |
30 | size_t resp_ies_len); | |
31 | ||
32 | ||
6fc6879b JM |
33 | static int wpa_ft_rrb_send(struct wpa_authenticator *wpa_auth, const u8 *dst, |
34 | const u8 *data, size_t data_len) | |
35 | { | |
cef8fac0 | 36 | if (wpa_auth->cb->send_ether == NULL) |
6fc6879b | 37 | return -1; |
67ccef7e | 38 | wpa_printf(MSG_DEBUG, "FT: RRB send to " MACSTR, MAC2STR(dst)); |
cef8fac0 JB |
39 | return wpa_auth->cb->send_ether(wpa_auth->cb_ctx, dst, ETH_P_RRB, |
40 | data, data_len); | |
6fc6879b JM |
41 | } |
42 | ||
43 | ||
44 | static int wpa_ft_action_send(struct wpa_authenticator *wpa_auth, | |
45 | const u8 *dst, const u8 *data, size_t data_len) | |
46 | { | |
cef8fac0 | 47 | if (wpa_auth->cb->send_ft_action == NULL) |
6fc6879b | 48 | return -1; |
cef8fac0 JB |
49 | return wpa_auth->cb->send_ft_action(wpa_auth->cb_ctx, dst, |
50 | data, data_len); | |
6fc6879b JM |
51 | } |
52 | ||
53 | ||
96590564 MB |
54 | static const u8 * wpa_ft_get_psk(struct wpa_authenticator *wpa_auth, |
55 | const u8 *addr, const u8 *p2p_dev_addr, | |
56 | const u8 *prev_psk) | |
57 | { | |
cef8fac0 | 58 | if (wpa_auth->cb->get_psk == NULL) |
96590564 | 59 | return NULL; |
cef8fac0 JB |
60 | return wpa_auth->cb->get_psk(wpa_auth->cb_ctx, addr, p2p_dev_addr, |
61 | prev_psk); | |
96590564 MB |
62 | } |
63 | ||
64 | ||
6fc6879b JM |
65 | static struct wpa_state_machine * |
66 | wpa_ft_add_sta(struct wpa_authenticator *wpa_auth, const u8 *sta_addr) | |
67 | { | |
cef8fac0 | 68 | if (wpa_auth->cb->add_sta == NULL) |
6fc6879b | 69 | return NULL; |
cef8fac0 | 70 | return wpa_auth->cb->add_sta(wpa_auth->cb_ctx, sta_addr); |
6fc6879b JM |
71 | } |
72 | ||
73 | ||
88b32a99 SP |
74 | static int wpa_ft_add_tspec(struct wpa_authenticator *wpa_auth, |
75 | const u8 *sta_addr, | |
76 | u8 *tspec_ie, size_t tspec_ielen) | |
77 | { | |
cef8fac0 | 78 | if (wpa_auth->cb->add_tspec == NULL) { |
006309b5 | 79 | wpa_printf(MSG_DEBUG, "FT: add_tspec is not initialized"); |
88b32a99 SP |
80 | return -1; |
81 | } | |
cef8fac0 JB |
82 | return wpa_auth->cb->add_tspec(wpa_auth->cb_ctx, sta_addr, tspec_ie, |
83 | tspec_ielen); | |
88b32a99 SP |
84 | } |
85 | ||
86 | ||
6fc6879b JM |
87 | int wpa_write_mdie(struct wpa_auth_config *conf, u8 *buf, size_t len) |
88 | { | |
89 | u8 *pos = buf; | |
90 | u8 capab; | |
91 | if (len < 2 + sizeof(struct rsn_mdie)) | |
92 | return -1; | |
93 | ||
94 | *pos++ = WLAN_EID_MOBILITY_DOMAIN; | |
95 | *pos++ = MOBILITY_DOMAIN_ID_LEN + 1; | |
96 | os_memcpy(pos, conf->mobility_domain, MOBILITY_DOMAIN_ID_LEN); | |
97 | pos += MOBILITY_DOMAIN_ID_LEN; | |
d7956add SP |
98 | capab = 0; |
99 | if (conf->ft_over_ds) | |
100 | capab |= RSN_FT_CAPAB_FT_OVER_DS; | |
6fc6879b JM |
101 | *pos++ = capab; |
102 | ||
103 | return pos - buf; | |
104 | } | |
105 | ||
106 | ||
86dfabb8 JM |
107 | int wpa_write_ftie(struct wpa_auth_config *conf, const u8 *r0kh_id, |
108 | size_t r0kh_id_len, | |
109 | const u8 *anonce, const u8 *snonce, | |
110 | u8 *buf, size_t len, const u8 *subelem, | |
111 | size_t subelem_len) | |
6fc6879b JM |
112 | { |
113 | u8 *pos = buf, *ielen; | |
114 | struct rsn_ftie *hdr; | |
115 | ||
116 | if (len < 2 + sizeof(*hdr) + 2 + FT_R1KH_ID_LEN + 2 + r0kh_id_len + | |
117 | subelem_len) | |
118 | return -1; | |
119 | ||
120 | *pos++ = WLAN_EID_FAST_BSS_TRANSITION; | |
121 | ielen = pos++; | |
122 | ||
123 | hdr = (struct rsn_ftie *) pos; | |
124 | os_memset(hdr, 0, sizeof(*hdr)); | |
125 | pos += sizeof(*hdr); | |
126 | WPA_PUT_LE16(hdr->mic_control, 0); | |
127 | if (anonce) | |
128 | os_memcpy(hdr->anonce, anonce, WPA_NONCE_LEN); | |
129 | if (snonce) | |
130 | os_memcpy(hdr->snonce, snonce, WPA_NONCE_LEN); | |
131 | ||
132 | /* Optional Parameters */ | |
133 | *pos++ = FTIE_SUBELEM_R1KH_ID; | |
134 | *pos++ = FT_R1KH_ID_LEN; | |
135 | os_memcpy(pos, conf->r1_key_holder, FT_R1KH_ID_LEN); | |
136 | pos += FT_R1KH_ID_LEN; | |
137 | ||
138 | if (r0kh_id) { | |
139 | *pos++ = FTIE_SUBELEM_R0KH_ID; | |
140 | *pos++ = r0kh_id_len; | |
141 | os_memcpy(pos, r0kh_id, r0kh_id_len); | |
142 | pos += r0kh_id_len; | |
143 | } | |
144 | ||
145 | if (subelem) { | |
146 | os_memcpy(pos, subelem, subelem_len); | |
147 | pos += subelem_len; | |
148 | } | |
149 | ||
150 | *ielen = pos - buf - 2; | |
151 | ||
152 | return pos - buf; | |
153 | } | |
154 | ||
155 | ||
156 | struct wpa_ft_pmk_r0_sa { | |
157 | struct wpa_ft_pmk_r0_sa *next; | |
158 | u8 pmk_r0[PMK_LEN]; | |
159 | u8 pmk_r0_name[WPA_PMK_NAME_LEN]; | |
160 | u8 spa[ETH_ALEN]; | |
1b484d60 | 161 | int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */ |
6fc6879b JM |
162 | /* TODO: expiration, identity, radius_class, EAP type, VLAN ID */ |
163 | int pmk_r1_pushed; | |
164 | }; | |
165 | ||
166 | struct wpa_ft_pmk_r1_sa { | |
167 | struct wpa_ft_pmk_r1_sa *next; | |
168 | u8 pmk_r1[PMK_LEN]; | |
169 | u8 pmk_r1_name[WPA_PMK_NAME_LEN]; | |
170 | u8 spa[ETH_ALEN]; | |
1b484d60 | 171 | int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */ |
6fc6879b JM |
172 | /* TODO: expiration, identity, radius_class, EAP type, VLAN ID */ |
173 | }; | |
174 | ||
175 | struct wpa_ft_pmk_cache { | |
176 | struct wpa_ft_pmk_r0_sa *pmk_r0; | |
177 | struct wpa_ft_pmk_r1_sa *pmk_r1; | |
178 | }; | |
179 | ||
180 | struct wpa_ft_pmk_cache * wpa_ft_pmk_cache_init(void) | |
181 | { | |
182 | struct wpa_ft_pmk_cache *cache; | |
183 | ||
184 | cache = os_zalloc(sizeof(*cache)); | |
185 | ||
186 | return cache; | |
187 | } | |
188 | ||
189 | ||
190 | void wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache *cache) | |
191 | { | |
192 | struct wpa_ft_pmk_r0_sa *r0, *r0prev; | |
193 | struct wpa_ft_pmk_r1_sa *r1, *r1prev; | |
194 | ||
195 | r0 = cache->pmk_r0; | |
196 | while (r0) { | |
197 | r0prev = r0; | |
198 | r0 = r0->next; | |
199 | os_memset(r0prev->pmk_r0, 0, PMK_LEN); | |
200 | os_free(r0prev); | |
201 | } | |
202 | ||
203 | r1 = cache->pmk_r1; | |
204 | while (r1) { | |
205 | r1prev = r1; | |
206 | r1 = r1->next; | |
207 | os_memset(r1prev->pmk_r1, 0, PMK_LEN); | |
208 | os_free(r1prev); | |
209 | } | |
210 | ||
211 | os_free(cache); | |
212 | } | |
213 | ||
214 | ||
215 | static int wpa_ft_store_pmk_r0(struct wpa_authenticator *wpa_auth, | |
216 | const u8 *spa, const u8 *pmk_r0, | |
1b484d60 | 217 | const u8 *pmk_r0_name, int pairwise) |
6fc6879b JM |
218 | { |
219 | struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache; | |
220 | struct wpa_ft_pmk_r0_sa *r0; | |
221 | ||
222 | /* TODO: add expiration and limit on number of entries in cache */ | |
223 | ||
224 | r0 = os_zalloc(sizeof(*r0)); | |
225 | if (r0 == NULL) | |
226 | return -1; | |
227 | ||
228 | os_memcpy(r0->pmk_r0, pmk_r0, PMK_LEN); | |
229 | os_memcpy(r0->pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN); | |
230 | os_memcpy(r0->spa, spa, ETH_ALEN); | |
1b484d60 | 231 | r0->pairwise = pairwise; |
6fc6879b JM |
232 | |
233 | r0->next = cache->pmk_r0; | |
234 | cache->pmk_r0 = r0; | |
235 | ||
236 | return 0; | |
237 | } | |
238 | ||
239 | ||
240 | static int wpa_ft_fetch_pmk_r0(struct wpa_authenticator *wpa_auth, | |
241 | const u8 *spa, const u8 *pmk_r0_name, | |
1b484d60 | 242 | u8 *pmk_r0, int *pairwise) |
6fc6879b JM |
243 | { |
244 | struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache; | |
245 | struct wpa_ft_pmk_r0_sa *r0; | |
246 | ||
247 | r0 = cache->pmk_r0; | |
248 | while (r0) { | |
249 | if (os_memcmp(r0->spa, spa, ETH_ALEN) == 0 && | |
870834a1 JM |
250 | os_memcmp_const(r0->pmk_r0_name, pmk_r0_name, |
251 | WPA_PMK_NAME_LEN) == 0) { | |
6fc6879b | 252 | os_memcpy(pmk_r0, r0->pmk_r0, PMK_LEN); |
1b484d60 JM |
253 | if (pairwise) |
254 | *pairwise = r0->pairwise; | |
6fc6879b JM |
255 | return 0; |
256 | } | |
257 | ||
258 | r0 = r0->next; | |
259 | } | |
260 | ||
261 | return -1; | |
262 | } | |
263 | ||
264 | ||
265 | static int wpa_ft_store_pmk_r1(struct wpa_authenticator *wpa_auth, | |
266 | const u8 *spa, const u8 *pmk_r1, | |
1b484d60 | 267 | const u8 *pmk_r1_name, int pairwise) |
6fc6879b JM |
268 | { |
269 | struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache; | |
270 | struct wpa_ft_pmk_r1_sa *r1; | |
271 | ||
272 | /* TODO: add expiration and limit on number of entries in cache */ | |
273 | ||
274 | r1 = os_zalloc(sizeof(*r1)); | |
275 | if (r1 == NULL) | |
276 | return -1; | |
277 | ||
278 | os_memcpy(r1->pmk_r1, pmk_r1, PMK_LEN); | |
279 | os_memcpy(r1->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN); | |
280 | os_memcpy(r1->spa, spa, ETH_ALEN); | |
1b484d60 | 281 | r1->pairwise = pairwise; |
6fc6879b JM |
282 | |
283 | r1->next = cache->pmk_r1; | |
284 | cache->pmk_r1 = r1; | |
285 | ||
286 | return 0; | |
287 | } | |
288 | ||
289 | ||
290 | static int wpa_ft_fetch_pmk_r1(struct wpa_authenticator *wpa_auth, | |
291 | const u8 *spa, const u8 *pmk_r1_name, | |
1b484d60 | 292 | u8 *pmk_r1, int *pairwise) |
6fc6879b JM |
293 | { |
294 | struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache; | |
295 | struct wpa_ft_pmk_r1_sa *r1; | |
296 | ||
297 | r1 = cache->pmk_r1; | |
298 | while (r1) { | |
299 | if (os_memcmp(r1->spa, spa, ETH_ALEN) == 0 && | |
870834a1 JM |
300 | os_memcmp_const(r1->pmk_r1_name, pmk_r1_name, |
301 | WPA_PMK_NAME_LEN) == 0) { | |
6fc6879b | 302 | os_memcpy(pmk_r1, r1->pmk_r1, PMK_LEN); |
1b484d60 JM |
303 | if (pairwise) |
304 | *pairwise = r1->pairwise; | |
6fc6879b JM |
305 | return 0; |
306 | } | |
307 | ||
308 | r1 = r1->next; | |
309 | } | |
310 | ||
311 | return -1; | |
312 | } | |
313 | ||
314 | ||
692ec305 JM |
315 | static int wpa_ft_pull_pmk_r1(struct wpa_state_machine *sm, |
316 | const u8 *ies, size_t ies_len, | |
317 | const u8 *pmk_r0_name) | |
6fc6879b JM |
318 | { |
319 | struct ft_remote_r0kh *r0kh; | |
320 | struct ft_r0kh_r1kh_pull_frame frame, f; | |
321 | ||
692ec305 | 322 | r0kh = sm->wpa_auth->conf.r0kh_list; |
6fc6879b | 323 | while (r0kh) { |
692ec305 | 324 | if (r0kh->id_len == sm->r0kh_id_len && |
870834a1 JM |
325 | os_memcmp_const(r0kh->id, sm->r0kh_id, sm->r0kh_id_len) == |
326 | 0) | |
6fc6879b JM |
327 | break; |
328 | r0kh = r0kh->next; | |
329 | } | |
692ec305 JM |
330 | if (r0kh == NULL) { |
331 | wpa_hexdump(MSG_DEBUG, "FT: Did not find R0KH-ID", | |
332 | sm->r0kh_id, sm->r0kh_id_len); | |
6fc6879b | 333 | return -1; |
692ec305 | 334 | } |
6fc6879b JM |
335 | |
336 | wpa_printf(MSG_DEBUG, "FT: Send PMK-R1 pull request to remote R0KH " | |
337 | "address " MACSTR, MAC2STR(r0kh->addr)); | |
338 | ||
339 | os_memset(&frame, 0, sizeof(frame)); | |
340 | frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB; | |
341 | frame.packet_type = FT_PACKET_R0KH_R1KH_PULL; | |
342 | frame.data_length = host_to_le16(FT_R0KH_R1KH_PULL_DATA_LEN); | |
692ec305 | 343 | os_memcpy(frame.ap_address, sm->wpa_auth->addr, ETH_ALEN); |
6fc6879b JM |
344 | |
345 | /* aes_wrap() does not support inplace encryption, so use a temporary | |
346 | * buffer for the data. */ | |
692ec305 | 347 | if (random_get_bytes(f.nonce, FT_R0KH_R1KH_PULL_NONCE_LEN)) { |
6fc6879b JM |
348 | wpa_printf(MSG_DEBUG, "FT: Failed to get random data for " |
349 | "nonce"); | |
350 | return -1; | |
351 | } | |
692ec305 JM |
352 | os_memcpy(sm->ft_pending_pull_nonce, f.nonce, |
353 | FT_R0KH_R1KH_PULL_NONCE_LEN); | |
6fc6879b | 354 | os_memcpy(f.pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN); |
692ec305 JM |
355 | os_memcpy(f.r1kh_id, sm->wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN); |
356 | os_memcpy(f.s1kh_id, sm->addr, ETH_ALEN); | |
5bcd5c5a | 357 | os_memset(f.pad, 0, sizeof(f.pad)); |
6fc6879b | 358 | |
eefec1e4 JM |
359 | if (aes_wrap(r0kh->key, sizeof(r0kh->key), |
360 | (FT_R0KH_R1KH_PULL_DATA_LEN + 7) / 8, | |
6fc6879b JM |
361 | f.nonce, frame.nonce) < 0) |
362 | return -1; | |
363 | ||
692ec305 JM |
364 | wpabuf_free(sm->ft_pending_req_ies); |
365 | sm->ft_pending_req_ies = wpabuf_alloc_copy(ies, ies_len); | |
366 | if (sm->ft_pending_req_ies == NULL) | |
367 | return -1; | |
368 | ||
369 | wpa_ft_rrb_send(sm->wpa_auth, r0kh->addr, (u8 *) &frame, sizeof(frame)); | |
6fc6879b JM |
370 | |
371 | return 0; | |
372 | } | |
373 | ||
374 | ||
375 | int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, const u8 *pmk, | |
98cd3d1c | 376 | struct wpa_ptk *ptk) |
6fc6879b JM |
377 | { |
378 | u8 pmk_r0[PMK_LEN], pmk_r0_name[WPA_PMK_NAME_LEN]; | |
26e23750 | 379 | u8 pmk_r1[PMK_LEN]; |
6fc6879b JM |
380 | u8 ptk_name[WPA_PMK_NAME_LEN]; |
381 | const u8 *mdid = sm->wpa_auth->conf.mobility_domain; | |
382 | const u8 *r0kh = sm->wpa_auth->conf.r0_key_holder; | |
383 | size_t r0kh_len = sm->wpa_auth->conf.r0_key_holder_len; | |
384 | const u8 *r1kh = sm->wpa_auth->conf.r1_key_holder; | |
385 | const u8 *ssid = sm->wpa_auth->conf.ssid; | |
386 | size_t ssid_len = sm->wpa_auth->conf.ssid_len; | |
96590564 | 387 | int psk_local = sm->wpa_auth->conf.ft_psk_generate_local; |
6fc6879b | 388 | |
6fc6879b JM |
389 | if (sm->xxkey_len == 0) { |
390 | wpa_printf(MSG_DEBUG, "FT: XXKey not available for key " | |
391 | "derivation"); | |
392 | return -1; | |
393 | } | |
394 | ||
364c064a JM |
395 | if (wpa_derive_pmk_r0(sm->xxkey, sm->xxkey_len, ssid, ssid_len, mdid, |
396 | r0kh, r0kh_len, sm->addr, | |
397 | pmk_r0, pmk_r0_name) < 0) | |
398 | return -1; | |
6fc6879b JM |
399 | wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, PMK_LEN); |
400 | wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name", pmk_r0_name, WPA_PMK_NAME_LEN); | |
96590564 MB |
401 | if (!psk_local || !wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt)) |
402 | wpa_ft_store_pmk_r0(sm->wpa_auth, sm->addr, pmk_r0, pmk_r0_name, | |
403 | sm->pairwise); | |
6fc6879b | 404 | |
364c064a JM |
405 | if (wpa_derive_pmk_r1(pmk_r0, pmk_r0_name, r1kh, sm->addr, |
406 | pmk_r1, sm->pmk_r1_name) < 0) | |
407 | return -1; | |
6fc6879b | 408 | wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, PMK_LEN); |
26e23750 JM |
409 | wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", sm->pmk_r1_name, |
410 | WPA_PMK_NAME_LEN); | |
96590564 MB |
411 | if (!psk_local || !wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt)) |
412 | wpa_ft_store_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1, | |
413 | sm->pmk_r1_name, sm->pairwise); | |
6fc6879b | 414 | |
98cd3d1c JM |
415 | return wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr, |
416 | sm->wpa_auth->addr, sm->pmk_r1_name, | |
417 | ptk, ptk_name, sm->wpa_key_mgmt, sm->pairwise); | |
6fc6879b JM |
418 | } |
419 | ||
420 | ||
421 | static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth, | |
422 | const u8 *addr, int idx, u8 *seq) | |
423 | { | |
cef8fac0 | 424 | if (wpa_auth->cb->get_seqnum == NULL) |
6fc6879b | 425 | return -1; |
cef8fac0 | 426 | return wpa_auth->cb->get_seqnum(wpa_auth->cb_ctx, addr, idx, seq); |
6fc6879b JM |
427 | } |
428 | ||
429 | ||
430 | static u8 * wpa_ft_gtk_subelem(struct wpa_state_machine *sm, size_t *len) | |
431 | { | |
432 | u8 *subelem; | |
433 | struct wpa_group *gsm = sm->group; | |
434 | size_t subelem_len, pad_len; | |
435 | const u8 *key; | |
436 | size_t key_len; | |
437 | u8 keybuf[32]; | |
438 | ||
439 | key_len = gsm->GTK_len; | |
440 | if (key_len > sizeof(keybuf)) | |
441 | return NULL; | |
442 | ||
443 | /* | |
444 | * Pad key for AES Key Wrap if it is not multiple of 8 bytes or is less | |
445 | * than 16 bytes. | |
446 | */ | |
447 | pad_len = key_len % 8; | |
448 | if (pad_len) | |
449 | pad_len = 8 - pad_len; | |
450 | if (key_len + pad_len < 16) | |
451 | pad_len += 8; | |
5bfc46bb | 452 | if (pad_len && key_len < sizeof(keybuf)) { |
6fc6879b JM |
453 | os_memcpy(keybuf, gsm->GTK[gsm->GN - 1], key_len); |
454 | os_memset(keybuf + key_len, 0, pad_len); | |
455 | keybuf[key_len] = 0xdd; | |
456 | key_len += pad_len; | |
457 | key = keybuf; | |
458 | } else | |
459 | key = gsm->GTK[gsm->GN - 1]; | |
460 | ||
461 | /* | |
39eb4d08 | 462 | * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] | |
6fc6879b JM |
463 | * Key[5..32]. |
464 | */ | |
39eb4d08 | 465 | subelem_len = 13 + key_len + 8; |
6fc6879b JM |
466 | subelem = os_zalloc(subelem_len); |
467 | if (subelem == NULL) | |
468 | return NULL; | |
469 | ||
470 | subelem[0] = FTIE_SUBELEM_GTK; | |
39eb4d08 JM |
471 | subelem[1] = 11 + key_len + 8; |
472 | /* Key ID in B0-B1 of Key Info */ | |
473 | WPA_PUT_LE16(&subelem[2], gsm->GN & 0x03); | |
474 | subelem[4] = gsm->GTK_len; | |
475 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, subelem + 5); | |
98cd3d1c JM |
476 | if (aes_wrap(sm->PTK.kek, sm->PTK.kek_len, key_len / 8, key, |
477 | subelem + 13)) { | |
6fc6879b JM |
478 | os_free(subelem); |
479 | return NULL; | |
480 | } | |
481 | ||
482 | *len = subelem_len; | |
483 | return subelem; | |
484 | } | |
485 | ||
486 | ||
b27f13ed JM |
487 | #ifdef CONFIG_IEEE80211W |
488 | static u8 * wpa_ft_igtk_subelem(struct wpa_state_machine *sm, size_t *len) | |
489 | { | |
490 | u8 *subelem, *pos; | |
491 | struct wpa_group *gsm = sm->group; | |
492 | size_t subelem_len; | |
493 | ||
ff89afb7 JM |
494 | /* Sub-elem ID[1] | Length[1] | KeyID[2] | IPN[6] | Key Length[1] | |
495 | * Key[16+8] */ | |
496 | subelem_len = 1 + 1 + 2 + 6 + 1 + WPA_IGTK_LEN + 8; | |
b27f13ed JM |
497 | subelem = os_zalloc(subelem_len); |
498 | if (subelem == NULL) | |
499 | return NULL; | |
500 | ||
501 | pos = subelem; | |
502 | *pos++ = FTIE_SUBELEM_IGTK; | |
503 | *pos++ = subelem_len - 2; | |
504 | WPA_PUT_LE16(pos, gsm->GN_igtk); | |
505 | pos += 2; | |
9008a3e4 | 506 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos); |
b27f13ed | 507 | pos += 6; |
ff89afb7 | 508 | *pos++ = WPA_IGTK_LEN; |
98cd3d1c | 509 | if (aes_wrap(sm->PTK.kek, sm->PTK.kek_len, WPA_IGTK_LEN / 8, |
b27f13ed JM |
510 | gsm->IGTK[gsm->GN_igtk - 4], pos)) { |
511 | os_free(subelem); | |
512 | return NULL; | |
513 | } | |
514 | ||
515 | *len = subelem_len; | |
516 | return subelem; | |
517 | } | |
518 | #endif /* CONFIG_IEEE80211W */ | |
519 | ||
520 | ||
88b32a99 SP |
521 | static u8 * wpa_ft_process_rdie(struct wpa_state_machine *sm, |
522 | u8 *pos, u8 *end, u8 id, u8 descr_count, | |
f238cf9f JM |
523 | const u8 *ies, size_t ies_len) |
524 | { | |
525 | struct ieee802_11_elems parse; | |
526 | struct rsn_rdie *rdie; | |
527 | ||
528 | wpa_printf(MSG_DEBUG, "FT: Resource Request: id=%d descr_count=%d", | |
529 | id, descr_count); | |
530 | wpa_hexdump(MSG_MSGDUMP, "FT: Resource descriptor IE(s)", | |
531 | ies, ies_len); | |
532 | ||
533 | if (end - pos < (int) sizeof(*rdie)) { | |
534 | wpa_printf(MSG_ERROR, "FT: Not enough room for response RDIE"); | |
535 | return pos; | |
536 | } | |
537 | ||
538 | *pos++ = WLAN_EID_RIC_DATA; | |
539 | *pos++ = sizeof(*rdie); | |
540 | rdie = (struct rsn_rdie *) pos; | |
541 | rdie->id = id; | |
542 | rdie->descr_count = 0; | |
543 | rdie->status_code = host_to_le16(WLAN_STATUS_SUCCESS); | |
544 | pos += sizeof(*rdie); | |
545 | ||
546 | if (ieee802_11_parse_elems((u8 *) ies, ies_len, &parse, 1) == | |
547 | ParseFailed) { | |
548 | wpa_printf(MSG_DEBUG, "FT: Failed to parse request IEs"); | |
549 | rdie->status_code = | |
550 | host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE); | |
551 | return pos; | |
552 | } | |
553 | ||
25310368 | 554 | if (parse.wmm_tspec) { |
f238cf9f | 555 | struct wmm_tspec_element *tspec; |
f238cf9f JM |
556 | |
557 | if (parse.wmm_tspec_len + 2 < (int) sizeof(*tspec)) { | |
558 | wpa_printf(MSG_DEBUG, "FT: Too short WMM TSPEC IE " | |
559 | "(%d)", (int) parse.wmm_tspec_len); | |
560 | rdie->status_code = | |
561 | host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE); | |
562 | return pos; | |
563 | } | |
564 | if (end - pos < (int) sizeof(*tspec)) { | |
565 | wpa_printf(MSG_ERROR, "FT: Not enough room for " | |
566 | "response TSPEC"); | |
567 | rdie->status_code = | |
568 | host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE); | |
569 | return pos; | |
570 | } | |
571 | tspec = (struct wmm_tspec_element *) pos; | |
572 | os_memcpy(tspec, parse.wmm_tspec - 2, sizeof(*tspec)); | |
25310368 JM |
573 | } |
574 | ||
575 | #ifdef NEED_AP_MLME | |
576 | if (parse.wmm_tspec && sm->wpa_auth->conf.ap_mlme) { | |
577 | int res; | |
578 | ||
579 | res = wmm_process_tspec((struct wmm_tspec_element *) pos); | |
f238cf9f JM |
580 | wpa_printf(MSG_DEBUG, "FT: ADDTS processing result: %d", res); |
581 | if (res == WMM_ADDTS_STATUS_INVALID_PARAMETERS) | |
582 | rdie->status_code = | |
583 | host_to_le16(WLAN_STATUS_INVALID_PARAMETERS); | |
584 | else if (res == WMM_ADDTS_STATUS_REFUSED) | |
585 | rdie->status_code = | |
586 | host_to_le16(WLAN_STATUS_REQUEST_DECLINED); | |
587 | else { | |
588 | /* TSPEC accepted; include updated TSPEC in response */ | |
589 | rdie->descr_count = 1; | |
25310368 | 590 | pos += sizeof(struct wmm_tspec_element); |
f238cf9f JM |
591 | } |
592 | return pos; | |
593 | } | |
fe6bdb77 | 594 | #endif /* NEED_AP_MLME */ |
f238cf9f | 595 | |
88b32a99 | 596 | if (parse.wmm_tspec && !sm->wpa_auth->conf.ap_mlme) { |
88b32a99 SP |
597 | int res; |
598 | ||
88b32a99 | 599 | res = wpa_ft_add_tspec(sm->wpa_auth, sm->addr, pos, |
25310368 | 600 | sizeof(struct wmm_tspec_element)); |
88b32a99 SP |
601 | if (res >= 0) { |
602 | if (res) | |
603 | rdie->status_code = host_to_le16(res); | |
604 | else { | |
605 | /* TSPEC accepted; include updated TSPEC in | |
606 | * response */ | |
006309b5 | 607 | rdie->descr_count = 1; |
25310368 | 608 | pos += sizeof(struct wmm_tspec_element); |
88b32a99 SP |
609 | } |
610 | return pos; | |
611 | } | |
612 | } | |
613 | ||
f238cf9f JM |
614 | wpa_printf(MSG_DEBUG, "FT: No supported resource requested"); |
615 | rdie->status_code = host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE); | |
616 | return pos; | |
617 | } | |
618 | ||
619 | ||
88b32a99 SP |
620 | static u8 * wpa_ft_process_ric(struct wpa_state_machine *sm, u8 *pos, u8 *end, |
621 | const u8 *ric, size_t ric_len) | |
f238cf9f JM |
622 | { |
623 | const u8 *rpos, *start; | |
624 | const struct rsn_rdie *rdie; | |
625 | ||
626 | wpa_hexdump(MSG_MSGDUMP, "FT: RIC Request", ric, ric_len); | |
627 | ||
628 | rpos = ric; | |
629 | while (rpos + sizeof(*rdie) < ric + ric_len) { | |
630 | if (rpos[0] != WLAN_EID_RIC_DATA || rpos[1] < sizeof(*rdie) || | |
631 | rpos + 2 + rpos[1] > ric + ric_len) | |
632 | break; | |
633 | rdie = (const struct rsn_rdie *) (rpos + 2); | |
634 | rpos += 2 + rpos[1]; | |
635 | start = rpos; | |
636 | ||
637 | while (rpos + 2 <= ric + ric_len && | |
638 | rpos + 2 + rpos[1] <= ric + ric_len) { | |
639 | if (rpos[0] == WLAN_EID_RIC_DATA) | |
640 | break; | |
641 | rpos += 2 + rpos[1]; | |
642 | } | |
88b32a99 | 643 | pos = wpa_ft_process_rdie(sm, pos, end, rdie->id, |
f238cf9f JM |
644 | rdie->descr_count, |
645 | start, rpos - start); | |
646 | } | |
647 | ||
648 | return pos; | |
649 | } | |
650 | ||
651 | ||
6fc6879b | 652 | u8 * wpa_sm_write_assoc_resp_ies(struct wpa_state_machine *sm, u8 *pos, |
f238cf9f JM |
653 | size_t max_len, int auth_alg, |
654 | const u8 *req_ies, size_t req_ies_len) | |
6fc6879b | 655 | { |
738a1cb2 JM |
656 | u8 *end, *mdie, *ftie, *rsnie = NULL, *r0kh_id, *subelem = NULL; |
657 | size_t mdie_len, ftie_len, rsnie_len = 0, r0kh_id_len, subelem_len = 0; | |
6fc6879b JM |
658 | int res; |
659 | struct wpa_auth_config *conf; | |
660 | struct rsn_ftie *_ftie; | |
f238cf9f JM |
661 | struct wpa_ft_ies parse; |
662 | u8 *ric_start; | |
6e80516a | 663 | u8 *anonce, *snonce; |
6fc6879b JM |
664 | |
665 | if (sm == NULL) | |
666 | return pos; | |
667 | ||
668 | conf = &sm->wpa_auth->conf; | |
669 | ||
aa189ac9 | 670 | if (!wpa_key_mgmt_ft(sm->wpa_key_mgmt)) |
6fc6879b JM |
671 | return pos; |
672 | ||
673 | end = pos + max_len; | |
674 | ||
738a1cb2 JM |
675 | if (auth_alg == WLAN_AUTH_FT) { |
676 | /* | |
677 | * RSN (only present if this is a Reassociation Response and | |
678 | * part of a fast BSS transition) | |
679 | */ | |
680 | res = wpa_write_rsn_ie(conf, pos, end - pos, sm->pmk_r1_name); | |
681 | if (res < 0) | |
682 | return pos; | |
683 | rsnie = pos; | |
684 | rsnie_len = res; | |
685 | pos += res; | |
686 | } | |
6fc6879b JM |
687 | |
688 | /* Mobility Domain Information */ | |
689 | res = wpa_write_mdie(conf, pos, end - pos); | |
690 | if (res < 0) | |
691 | return pos; | |
692 | mdie = pos; | |
693 | mdie_len = res; | |
694 | pos += res; | |
695 | ||
696 | /* Fast BSS Transition Information */ | |
697 | if (auth_alg == WLAN_AUTH_FT) { | |
698 | subelem = wpa_ft_gtk_subelem(sm, &subelem_len); | |
699 | r0kh_id = sm->r0kh_id; | |
700 | r0kh_id_len = sm->r0kh_id_len; | |
6e80516a JM |
701 | anonce = sm->ANonce; |
702 | snonce = sm->SNonce; | |
b27f13ed JM |
703 | #ifdef CONFIG_IEEE80211W |
704 | if (sm->mgmt_frame_prot) { | |
705 | u8 *igtk; | |
706 | size_t igtk_len; | |
707 | u8 *nbuf; | |
708 | igtk = wpa_ft_igtk_subelem(sm, &igtk_len); | |
709 | if (igtk == NULL) { | |
710 | os_free(subelem); | |
711 | return pos; | |
712 | } | |
713 | nbuf = os_realloc(subelem, subelem_len + igtk_len); | |
714 | if (nbuf == NULL) { | |
715 | os_free(subelem); | |
716 | os_free(igtk); | |
717 | return pos; | |
718 | } | |
719 | subelem = nbuf; | |
720 | os_memcpy(subelem + subelem_len, igtk, igtk_len); | |
721 | subelem_len += igtk_len; | |
722 | os_free(igtk); | |
723 | } | |
724 | #endif /* CONFIG_IEEE80211W */ | |
6fc6879b JM |
725 | } else { |
726 | r0kh_id = conf->r0_key_holder; | |
727 | r0kh_id_len = conf->r0_key_holder_len; | |
6e80516a JM |
728 | anonce = NULL; |
729 | snonce = NULL; | |
6fc6879b | 730 | } |
6e80516a | 731 | res = wpa_write_ftie(conf, r0kh_id, r0kh_id_len, anonce, snonce, pos, |
6fc6879b JM |
732 | end - pos, subelem, subelem_len); |
733 | os_free(subelem); | |
734 | if (res < 0) | |
735 | return pos; | |
736 | ftie = pos; | |
737 | ftie_len = res; | |
738 | pos += res; | |
739 | ||
740 | _ftie = (struct rsn_ftie *) (ftie + 2); | |
1f6e69e0 JM |
741 | if (auth_alg == WLAN_AUTH_FT) |
742 | _ftie->mic_control[1] = 3; /* Information element count */ | |
f238cf9f JM |
743 | |
744 | ric_start = pos; | |
745 | if (wpa_ft_parse_ies(req_ies, req_ies_len, &parse) == 0 && parse.ric) { | |
88b32a99 SP |
746 | pos = wpa_ft_process_ric(sm, pos, end, parse.ric, |
747 | parse.ric_len); | |
1f6e69e0 JM |
748 | if (auth_alg == WLAN_AUTH_FT) |
749 | _ftie->mic_control[1] += | |
750 | ieee802_11_ie_count(ric_start, | |
751 | pos - ric_start); | |
f238cf9f JM |
752 | } |
753 | if (ric_start == pos) | |
754 | ric_start = NULL; | |
755 | ||
1f6e69e0 | 756 | if (auth_alg == WLAN_AUTH_FT && |
98cd3d1c JM |
757 | wpa_ft_mic(sm->PTK.kck, sm->PTK.kck_len, sm->addr, |
758 | sm->wpa_auth->addr, 6, | |
6fc6879b | 759 | mdie, mdie_len, ftie, ftie_len, |
f238cf9f JM |
760 | rsnie, rsnie_len, |
761 | ric_start, ric_start ? pos - ric_start : 0, | |
762 | _ftie->mic) < 0) | |
6fc6879b JM |
763 | wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC"); |
764 | ||
e44bd28c JM |
765 | os_free(sm->assoc_resp_ftie); |
766 | sm->assoc_resp_ftie = os_malloc(ftie_len); | |
767 | if (sm->assoc_resp_ftie) | |
768 | os_memcpy(sm->assoc_resp_ftie, ftie, ftie_len); | |
769 | ||
6fc6879b JM |
770 | return pos; |
771 | } | |
772 | ||
773 | ||
6fc6879b JM |
774 | static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth, |
775 | int vlan_id, | |
71934751 | 776 | enum wpa_alg alg, const u8 *addr, int idx, |
6fc6879b JM |
777 | u8 *key, size_t key_len) |
778 | { | |
cef8fac0 | 779 | if (wpa_auth->cb->set_key == NULL) |
6fc6879b | 780 | return -1; |
cef8fac0 JB |
781 | return wpa_auth->cb->set_key(wpa_auth->cb_ctx, vlan_id, alg, addr, idx, |
782 | key, key_len); | |
6fc6879b JM |
783 | } |
784 | ||
785 | ||
0e84c254 | 786 | void wpa_ft_install_ptk(struct wpa_state_machine *sm) |
6fc6879b | 787 | { |
71934751 | 788 | enum wpa_alg alg; |
6fc6879b JM |
789 | int klen; |
790 | ||
791 | /* MLME-SETKEYS.request(PTK) */ | |
c3550295 JM |
792 | alg = wpa_cipher_to_alg(sm->pairwise); |
793 | klen = wpa_cipher_key_len(sm->pairwise); | |
794 | if (!wpa_cipher_valid_pairwise(sm->pairwise)) { | |
0e84c254 JM |
795 | wpa_printf(MSG_DEBUG, "FT: Unknown pairwise alg 0x%x - skip " |
796 | "PTK configuration", sm->pairwise); | |
6fc6879b | 797 | return; |
0e84c254 | 798 | } |
6fc6879b JM |
799 | |
800 | /* FIX: add STA entry to kernel/driver here? The set_key will fail | |
801 | * most likely without this.. At the moment, STA entry is added only | |
0e84c254 JM |
802 | * after association has been completed. This function will be called |
803 | * again after association to get the PTK configured, but that could be | |
804 | * optimized by adding the STA entry earlier. | |
6fc6879b JM |
805 | */ |
806 | if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0, | |
98cd3d1c | 807 | sm->PTK.tk, klen)) |
6fc6879b JM |
808 | return; |
809 | ||
810 | /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */ | |
811 | sm->pairwise_set = TRUE; | |
812 | } | |
813 | ||
814 | ||
96590564 MB |
815 | /* Derive PMK-R1 from PSK, check all available PSK */ |
816 | static int wpa_ft_psk_pmk_r1(struct wpa_state_machine *sm, | |
817 | const u8 *req_pmk_r1_name, | |
818 | u8 *out_pmk_r1, int *out_pairwise) | |
819 | { | |
820 | const u8 *pmk = NULL; | |
821 | u8 pmk_r0[PMK_LEN], pmk_r0_name[WPA_PMK_NAME_LEN]; | |
822 | u8 pmk_r1[PMK_LEN], pmk_r1_name[WPA_PMK_NAME_LEN]; | |
823 | struct wpa_authenticator *wpa_auth = sm->wpa_auth; | |
824 | const u8 *mdid = wpa_auth->conf.mobility_domain; | |
825 | const u8 *r0kh = sm->r0kh_id; | |
826 | size_t r0kh_len = sm->r0kh_id_len; | |
827 | const u8 *r1kh = wpa_auth->conf.r1_key_holder; | |
828 | const u8 *ssid = wpa_auth->conf.ssid; | |
829 | size_t ssid_len = wpa_auth->conf.ssid_len; | |
830 | int pairwise; | |
831 | ||
832 | pairwise = sm->pairwise; | |
833 | ||
834 | for (;;) { | |
835 | pmk = wpa_ft_get_psk(wpa_auth, sm->addr, sm->p2p_dev_addr, | |
836 | pmk); | |
837 | if (pmk == NULL) | |
838 | break; | |
839 | ||
364c064a JM |
840 | if (wpa_derive_pmk_r0(pmk, PMK_LEN, ssid, ssid_len, mdid, r0kh, |
841 | r0kh_len, sm->addr, | |
842 | pmk_r0, pmk_r0_name) < 0 || | |
843 | wpa_derive_pmk_r1(pmk_r0, pmk_r0_name, r1kh, sm->addr, | |
844 | pmk_r1, pmk_r1_name) < 0 || | |
845 | os_memcmp_const(pmk_r1_name, req_pmk_r1_name, | |
96590564 MB |
846 | WPA_PMK_NAME_LEN) != 0) |
847 | continue; | |
848 | ||
849 | /* We found a PSK that matches the requested pmk_r1_name */ | |
850 | wpa_printf(MSG_DEBUG, | |
851 | "FT: Found PSK to generate PMK-R1 locally"); | |
852 | os_memcpy(out_pmk_r1, pmk_r1, PMK_LEN); | |
853 | if (out_pairwise) | |
854 | *out_pairwise = pairwise; | |
855 | return 0; | |
856 | } | |
857 | ||
858 | wpa_printf(MSG_DEBUG, | |
859 | "FT: Did not find PSK to generate PMK-R1 locally"); | |
860 | return -1; | |
861 | } | |
862 | ||
863 | ||
864 | /* Detect the configuration the station asked for. | |
865 | * Required to detect FT-PSK and pairwise cipher. | |
866 | */ | |
867 | static int wpa_ft_set_key_mgmt(struct wpa_state_machine *sm, | |
868 | struct wpa_ft_ies *parse) | |
869 | { | |
870 | int key_mgmt, ciphers; | |
871 | ||
872 | if (sm->wpa_key_mgmt) | |
873 | return 0; | |
874 | ||
875 | key_mgmt = parse->key_mgmt & sm->wpa_auth->conf.wpa_key_mgmt; | |
876 | if (!key_mgmt) { | |
877 | wpa_printf(MSG_DEBUG, "FT: Invalid key mgmt (0x%x) from " | |
878 | MACSTR, parse->key_mgmt, MAC2STR(sm->addr)); | |
879 | return -1; | |
880 | } | |
881 | if (key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X) | |
882 | sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X; | |
883 | else if (key_mgmt & WPA_KEY_MGMT_FT_PSK) | |
884 | sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_PSK; | |
5aa08153 JM |
885 | #ifdef CONFIG_FILS |
886 | else if (key_mgmt & WPA_KEY_MGMT_FT_FILS_SHA256) | |
887 | sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_FILS_SHA256; | |
888 | else if (key_mgmt & WPA_KEY_MGMT_FT_FILS_SHA384) | |
889 | sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_FILS_SHA384; | |
890 | #endif /* CONFIG_FILS */ | |
96590564 MB |
891 | ciphers = parse->pairwise_cipher & sm->wpa_auth->conf.rsn_pairwise; |
892 | if (!ciphers) { | |
893 | wpa_printf(MSG_DEBUG, "FT: Invalid pairwise cipher (0x%x) from " | |
894 | MACSTR, | |
895 | parse->pairwise_cipher, MAC2STR(sm->addr)); | |
896 | return -1; | |
897 | } | |
898 | sm->pairwise = wpa_pick_pairwise_cipher(ciphers, 0); | |
899 | ||
900 | return 0; | |
901 | } | |
902 | ||
903 | ||
692ec305 | 904 | static int wpa_ft_process_auth_req(struct wpa_state_machine *sm, |
6fc6879b JM |
905 | const u8 *ies, size_t ies_len, |
906 | u8 **resp_ies, size_t *resp_ies_len) | |
907 | { | |
908 | struct rsn_mdie *mdie; | |
909 | struct rsn_ftie *ftie; | |
910 | u8 pmk_r1[PMK_LEN], pmk_r1_name[WPA_PMK_NAME_LEN]; | |
911 | u8 ptk_name[WPA_PMK_NAME_LEN]; | |
912 | struct wpa_auth_config *conf; | |
913 | struct wpa_ft_ies parse; | |
98cd3d1c | 914 | size_t buflen; |
6fc6879b JM |
915 | int ret; |
916 | u8 *pos, *end; | |
1b484d60 | 917 | int pairwise; |
6fc6879b JM |
918 | |
919 | *resp_ies = NULL; | |
920 | *resp_ies_len = 0; | |
921 | ||
922 | sm->pmk_r1_name_valid = 0; | |
923 | conf = &sm->wpa_auth->conf; | |
924 | ||
925 | wpa_hexdump(MSG_DEBUG, "FT: Received authentication frame IEs", | |
926 | ies, ies_len); | |
927 | ||
928 | if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) { | |
929 | wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs"); | |
930 | return WLAN_STATUS_UNSPECIFIED_FAILURE; | |
931 | } | |
932 | ||
933 | mdie = (struct rsn_mdie *) parse.mdie; | |
934 | if (mdie == NULL || parse.mdie_len < sizeof(*mdie) || | |
935 | os_memcmp(mdie->mobility_domain, | |
936 | sm->wpa_auth->conf.mobility_domain, | |
937 | MOBILITY_DOMAIN_ID_LEN) != 0) { | |
938 | wpa_printf(MSG_DEBUG, "FT: Invalid MDIE"); | |
939 | return WLAN_STATUS_INVALID_MDIE; | |
940 | } | |
941 | ||
942 | ftie = (struct rsn_ftie *) parse.ftie; | |
943 | if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) { | |
944 | wpa_printf(MSG_DEBUG, "FT: Invalid FTIE"); | |
945 | return WLAN_STATUS_INVALID_FTIE; | |
946 | } | |
947 | ||
948 | os_memcpy(sm->SNonce, ftie->snonce, WPA_NONCE_LEN); | |
949 | ||
950 | if (parse.r0kh_id == NULL) { | |
951 | wpa_printf(MSG_DEBUG, "FT: Invalid FTIE - no R0KH-ID"); | |
952 | return WLAN_STATUS_INVALID_FTIE; | |
953 | } | |
954 | ||
955 | wpa_hexdump(MSG_DEBUG, "FT: STA R0KH-ID", | |
956 | parse.r0kh_id, parse.r0kh_id_len); | |
957 | os_memcpy(sm->r0kh_id, parse.r0kh_id, parse.r0kh_id_len); | |
958 | sm->r0kh_id_len = parse.r0kh_id_len; | |
959 | ||
960 | if (parse.rsn_pmkid == NULL) { | |
961 | wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE"); | |
962 | return WLAN_STATUS_INVALID_PMKID; | |
963 | } | |
964 | ||
96590564 MB |
965 | if (wpa_ft_set_key_mgmt(sm, &parse) < 0) |
966 | return WLAN_STATUS_UNSPECIFIED_FAILURE; | |
967 | ||
6fc6879b JM |
968 | wpa_hexdump(MSG_DEBUG, "FT: Requested PMKR0Name", |
969 | parse.rsn_pmkid, WPA_PMK_NAME_LEN); | |
364c064a JM |
970 | if (wpa_derive_pmk_r1_name(parse.rsn_pmkid, |
971 | sm->wpa_auth->conf.r1_key_holder, sm->addr, | |
972 | pmk_r1_name) < 0) | |
973 | return WLAN_STATUS_UNSPECIFIED_FAILURE; | |
6fc6879b JM |
974 | wpa_hexdump(MSG_DEBUG, "FT: Derived requested PMKR1Name", |
975 | pmk_r1_name, WPA_PMK_NAME_LEN); | |
976 | ||
96590564 MB |
977 | if (conf->ft_psk_generate_local && |
978 | wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt)) { | |
979 | if (wpa_ft_psk_pmk_r1(sm, pmk_r1_name, pmk_r1, &pairwise) < 0) | |
980 | return WLAN_STATUS_INVALID_PMKID; | |
981 | } else if (wpa_ft_fetch_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1_name, | |
982 | pmk_r1, &pairwise) < 0) { | |
692ec305 | 983 | if (wpa_ft_pull_pmk_r1(sm, ies, ies_len, parse.rsn_pmkid) < 0) { |
6fc6879b JM |
984 | wpa_printf(MSG_DEBUG, "FT: Did not have matching " |
985 | "PMK-R1 and unknown R0KH-ID"); | |
986 | return WLAN_STATUS_INVALID_PMKID; | |
987 | } | |
988 | ||
692ec305 | 989 | return -1; /* Status pending */ |
6fc6879b JM |
990 | } |
991 | ||
992 | wpa_hexdump_key(MSG_DEBUG, "FT: Selected PMK-R1", pmk_r1, PMK_LEN); | |
993 | sm->pmk_r1_name_valid = 1; | |
994 | os_memcpy(sm->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN); | |
995 | ||
3642c431 | 996 | if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) { |
6fc6879b JM |
997 | wpa_printf(MSG_DEBUG, "FT: Failed to get random data for " |
998 | "ANonce"); | |
999 | return WLAN_STATUS_UNSPECIFIED_FAILURE; | |
1000 | } | |
1001 | ||
1002 | wpa_hexdump(MSG_DEBUG, "FT: Received SNonce", | |
1003 | sm->SNonce, WPA_NONCE_LEN); | |
1004 | wpa_hexdump(MSG_DEBUG, "FT: Generated ANonce", | |
1005 | sm->ANonce, WPA_NONCE_LEN); | |
1006 | ||
98cd3d1c JM |
1007 | if (wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr, |
1008 | sm->wpa_auth->addr, pmk_r1_name, | |
1009 | &sm->PTK, ptk_name, sm->wpa_key_mgmt, | |
1010 | pairwise) < 0) | |
1011 | return WLAN_STATUS_UNSPECIFIED_FAILURE; | |
6fc6879b | 1012 | |
0e84c254 | 1013 | sm->pairwise = pairwise; |
3d4d2348 | 1014 | sm->PTK_valid = TRUE; |
6fc6879b JM |
1015 | wpa_ft_install_ptk(sm); |
1016 | ||
1017 | buflen = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) + | |
1018 | 2 + FT_R1KH_ID_LEN + 200; | |
1019 | *resp_ies = os_zalloc(buflen); | |
a8e25dee JM |
1020 | if (*resp_ies == NULL) |
1021 | goto fail; | |
6fc6879b JM |
1022 | |
1023 | pos = *resp_ies; | |
1024 | end = *resp_ies + buflen; | |
1025 | ||
1026 | ret = wpa_write_rsn_ie(conf, pos, end - pos, parse.rsn_pmkid); | |
a8e25dee JM |
1027 | if (ret < 0) |
1028 | goto fail; | |
6fc6879b JM |
1029 | pos += ret; |
1030 | ||
1031 | ret = wpa_write_mdie(conf, pos, end - pos); | |
a8e25dee JM |
1032 | if (ret < 0) |
1033 | goto fail; | |
6fc6879b JM |
1034 | pos += ret; |
1035 | ||
1036 | ret = wpa_write_ftie(conf, parse.r0kh_id, parse.r0kh_id_len, | |
1037 | sm->ANonce, sm->SNonce, pos, end - pos, NULL, 0); | |
a8e25dee JM |
1038 | if (ret < 0) |
1039 | goto fail; | |
6fc6879b JM |
1040 | pos += ret; |
1041 | ||
1042 | *resp_ies_len = pos - *resp_ies; | |
1043 | ||
1044 | return WLAN_STATUS_SUCCESS; | |
a8e25dee JM |
1045 | fail: |
1046 | os_free(*resp_ies); | |
1047 | *resp_ies = NULL; | |
1048 | return WLAN_STATUS_UNSPECIFIED_FAILURE; | |
6fc6879b JM |
1049 | } |
1050 | ||
1051 | ||
1052 | void wpa_ft_process_auth(struct wpa_state_machine *sm, const u8 *bssid, | |
1053 | u16 auth_transaction, const u8 *ies, size_t ies_len, | |
1054 | void (*cb)(void *ctx, const u8 *dst, const u8 *bssid, | |
1055 | u16 auth_transaction, u16 status, | |
1056 | const u8 *ies, size_t ies_len), | |
1057 | void *ctx) | |
1058 | { | |
1059 | u16 status; | |
1060 | u8 *resp_ies; | |
1061 | size_t resp_ies_len; | |
692ec305 | 1062 | int res; |
6fc6879b JM |
1063 | |
1064 | if (sm == NULL) { | |
1065 | wpa_printf(MSG_DEBUG, "FT: Received authentication frame, but " | |
1066 | "WPA SM not available"); | |
1067 | return; | |
1068 | } | |
1069 | ||
1070 | wpa_printf(MSG_DEBUG, "FT: Received authentication frame: STA=" MACSTR | |
1071 | " BSSID=" MACSTR " transaction=%d", | |
1072 | MAC2STR(sm->addr), MAC2STR(bssid), auth_transaction); | |
692ec305 JM |
1073 | sm->ft_pending_cb = cb; |
1074 | sm->ft_pending_cb_ctx = ctx; | |
1075 | sm->ft_pending_auth_transaction = auth_transaction; | |
1076 | res = wpa_ft_process_auth_req(sm, ies, ies_len, &resp_ies, | |
1077 | &resp_ies_len); | |
1078 | if (res < 0) { | |
1079 | wpa_printf(MSG_DEBUG, "FT: Callback postponed until response is available"); | |
1080 | return; | |
1081 | } | |
1082 | status = res; | |
6fc6879b JM |
1083 | |
1084 | wpa_printf(MSG_DEBUG, "FT: FT authentication response: dst=" MACSTR | |
1085 | " auth_transaction=%d status=%d", | |
1086 | MAC2STR(sm->addr), auth_transaction + 1, status); | |
1087 | wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len); | |
1088 | cb(ctx, sm->addr, bssid, auth_transaction + 1, status, | |
1089 | resp_ies, resp_ies_len); | |
1090 | os_free(resp_ies); | |
1091 | } | |
1092 | ||
1093 | ||
1094 | u16 wpa_ft_validate_reassoc(struct wpa_state_machine *sm, const u8 *ies, | |
1095 | size_t ies_len) | |
1096 | { | |
1097 | struct wpa_ft_ies parse; | |
1098 | struct rsn_mdie *mdie; | |
1099 | struct rsn_ftie *ftie; | |
98cd3d1c JM |
1100 | u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN]; |
1101 | size_t mic_len = 16; | |
8aaf894d | 1102 | unsigned int count; |
6fc6879b JM |
1103 | |
1104 | if (sm == NULL) | |
1105 | return WLAN_STATUS_UNSPECIFIED_FAILURE; | |
1106 | ||
1107 | wpa_hexdump(MSG_DEBUG, "FT: Reassoc Req IEs", ies, ies_len); | |
1108 | ||
1109 | if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) { | |
1110 | wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs"); | |
1111 | return WLAN_STATUS_UNSPECIFIED_FAILURE; | |
1112 | } | |
1113 | ||
1114 | if (parse.rsn == NULL) { | |
1115 | wpa_printf(MSG_DEBUG, "FT: No RSNIE in Reassoc Req"); | |
1116 | return WLAN_STATUS_UNSPECIFIED_FAILURE; | |
1117 | } | |
1118 | ||
1119 | if (parse.rsn_pmkid == NULL) { | |
1120 | wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE"); | |
1121 | return WLAN_STATUS_INVALID_PMKID; | |
1122 | } | |
1123 | ||
870834a1 JM |
1124 | if (os_memcmp_const(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) |
1125 | != 0) { | |
6fc6879b JM |
1126 | wpa_printf(MSG_DEBUG, "FT: PMKID in Reassoc Req did not match " |
1127 | "with the PMKR1Name derived from auth request"); | |
1128 | return WLAN_STATUS_INVALID_PMKID; | |
1129 | } | |
1130 | ||
1131 | mdie = (struct rsn_mdie *) parse.mdie; | |
1132 | if (mdie == NULL || parse.mdie_len < sizeof(*mdie) || | |
1133 | os_memcmp(mdie->mobility_domain, | |
1134 | sm->wpa_auth->conf.mobility_domain, | |
1135 | MOBILITY_DOMAIN_ID_LEN) != 0) { | |
1136 | wpa_printf(MSG_DEBUG, "FT: Invalid MDIE"); | |
1137 | return WLAN_STATUS_INVALID_MDIE; | |
1138 | } | |
1139 | ||
1140 | ftie = (struct rsn_ftie *) parse.ftie; | |
1141 | if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) { | |
1142 | wpa_printf(MSG_DEBUG, "FT: Invalid FTIE"); | |
1143 | return WLAN_STATUS_INVALID_FTIE; | |
1144 | } | |
1145 | ||
0ae145cd JM |
1146 | if (os_memcmp(ftie->snonce, sm->SNonce, WPA_NONCE_LEN) != 0) { |
1147 | wpa_printf(MSG_DEBUG, "FT: SNonce mismatch in FTIE"); | |
1148 | wpa_hexdump(MSG_DEBUG, "FT: Received SNonce", | |
1149 | ftie->snonce, WPA_NONCE_LEN); | |
1150 | wpa_hexdump(MSG_DEBUG, "FT: Expected SNonce", | |
1151 | sm->SNonce, WPA_NONCE_LEN); | |
0a63635e | 1152 | return WLAN_STATUS_INVALID_FTIE; |
0ae145cd JM |
1153 | } |
1154 | ||
1155 | if (os_memcmp(ftie->anonce, sm->ANonce, WPA_NONCE_LEN) != 0) { | |
1156 | wpa_printf(MSG_DEBUG, "FT: ANonce mismatch in FTIE"); | |
1157 | wpa_hexdump(MSG_DEBUG, "FT: Received ANonce", | |
1158 | ftie->anonce, WPA_NONCE_LEN); | |
1159 | wpa_hexdump(MSG_DEBUG, "FT: Expected ANonce", | |
1160 | sm->ANonce, WPA_NONCE_LEN); | |
0a63635e | 1161 | return WLAN_STATUS_INVALID_FTIE; |
0ae145cd JM |
1162 | } |
1163 | ||
1164 | ||
1165 | if (parse.r0kh_id == NULL) { | |
1166 | wpa_printf(MSG_DEBUG, "FT: No R0KH-ID subelem in FTIE"); | |
0a63635e | 1167 | return WLAN_STATUS_INVALID_FTIE; |
0ae145cd JM |
1168 | } |
1169 | ||
1170 | if (parse.r0kh_id_len != sm->r0kh_id_len || | |
870834a1 JM |
1171 | os_memcmp_const(parse.r0kh_id, sm->r0kh_id, parse.r0kh_id_len) != 0) |
1172 | { | |
0ae145cd JM |
1173 | wpa_printf(MSG_DEBUG, "FT: R0KH-ID in FTIE did not match with " |
1174 | "the current R0KH-ID"); | |
1175 | wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID in FTIE", | |
1176 | parse.r0kh_id, parse.r0kh_id_len); | |
1177 | wpa_hexdump(MSG_DEBUG, "FT: The current R0KH-ID", | |
1178 | sm->r0kh_id, sm->r0kh_id_len); | |
0a63635e | 1179 | return WLAN_STATUS_INVALID_FTIE; |
0ae145cd JM |
1180 | } |
1181 | ||
1182 | if (parse.r1kh_id == NULL) { | |
1183 | wpa_printf(MSG_DEBUG, "FT: No R1KH-ID subelem in FTIE"); | |
0a63635e | 1184 | return WLAN_STATUS_INVALID_FTIE; |
0ae145cd JM |
1185 | } |
1186 | ||
870834a1 JM |
1187 | if (os_memcmp_const(parse.r1kh_id, sm->wpa_auth->conf.r1_key_holder, |
1188 | FT_R1KH_ID_LEN) != 0) { | |
0ae145cd JM |
1189 | wpa_printf(MSG_DEBUG, "FT: Unknown R1KH-ID used in " |
1190 | "ReassocReq"); | |
1191 | wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID in FTIE", | |
1192 | parse.r1kh_id, FT_R1KH_ID_LEN); | |
1193 | wpa_hexdump(MSG_DEBUG, "FT: Expected R1KH-ID", | |
1194 | sm->wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN); | |
0a63635e | 1195 | return WLAN_STATUS_INVALID_FTIE; |
0ae145cd JM |
1196 | } |
1197 | ||
1198 | if (parse.rsn_pmkid == NULL || | |
870834a1 JM |
1199 | os_memcmp_const(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN)) |
1200 | { | |
0ae145cd JM |
1201 | wpa_printf(MSG_DEBUG, "FT: No matching PMKR1Name (PMKID) in " |
1202 | "RSNIE (pmkid=%d)", !!parse.rsn_pmkid); | |
0a63635e | 1203 | return WLAN_STATUS_INVALID_PMKID; |
0ae145cd JM |
1204 | } |
1205 | ||
8aaf894d JM |
1206 | count = 3; |
1207 | if (parse.ric) | |
c284b461 | 1208 | count += ieee802_11_ie_count(parse.ric, parse.ric_len); |
8aaf894d JM |
1209 | if (ftie->mic_control[1] != count) { |
1210 | wpa_printf(MSG_DEBUG, "FT: Unexpected IE count in MIC " | |
1211 | "Control: received %u expected %u", | |
1212 | ftie->mic_control[1], count); | |
0a63635e | 1213 | return WLAN_STATUS_UNSPECIFIED_FAILURE; |
8aaf894d JM |
1214 | } |
1215 | ||
98cd3d1c JM |
1216 | if (wpa_ft_mic(sm->PTK.kck, sm->PTK.kck_len, sm->addr, |
1217 | sm->wpa_auth->addr, 5, | |
6fc6879b JM |
1218 | parse.mdie - 2, parse.mdie_len + 2, |
1219 | parse.ftie - 2, parse.ftie_len + 2, | |
babfbf15 JM |
1220 | parse.rsn - 2, parse.rsn_len + 2, |
1221 | parse.ric, parse.ric_len, | |
6fc6879b JM |
1222 | mic) < 0) { |
1223 | wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC"); | |
1224 | return WLAN_STATUS_UNSPECIFIED_FAILURE; | |
1225 | } | |
1226 | ||
98cd3d1c | 1227 | if (os_memcmp_const(mic, ftie->mic, mic_len) != 0) { |
6fc6879b | 1228 | wpa_printf(MSG_DEBUG, "FT: Invalid MIC in FTIE"); |
88b32a99 SP |
1229 | wpa_printf(MSG_DEBUG, "FT: addr=" MACSTR " auth_addr=" MACSTR, |
1230 | MAC2STR(sm->addr), MAC2STR(sm->wpa_auth->addr)); | |
98cd3d1c JM |
1231 | wpa_hexdump(MSG_MSGDUMP, "FT: Received MIC", |
1232 | ftie->mic, mic_len); | |
1233 | wpa_hexdump(MSG_MSGDUMP, "FT: Calculated MIC", mic, mic_len); | |
88b32a99 SP |
1234 | wpa_hexdump(MSG_MSGDUMP, "FT: MDIE", |
1235 | parse.mdie - 2, parse.mdie_len + 2); | |
1236 | wpa_hexdump(MSG_MSGDUMP, "FT: FTIE", | |
1237 | parse.ftie - 2, parse.ftie_len + 2); | |
1238 | wpa_hexdump(MSG_MSGDUMP, "FT: RSN", | |
1239 | parse.rsn - 2, parse.rsn_len + 2); | |
6fc6879b JM |
1240 | return WLAN_STATUS_INVALID_FTIE; |
1241 | } | |
1242 | ||
1243 | return WLAN_STATUS_SUCCESS; | |
1244 | } | |
1245 | ||
1246 | ||
1247 | int wpa_ft_action_rx(struct wpa_state_machine *sm, const u8 *data, size_t len) | |
1248 | { | |
1249 | const u8 *sta_addr, *target_ap; | |
1250 | const u8 *ies; | |
1251 | size_t ies_len; | |
1252 | u8 action; | |
1253 | struct ft_rrb_frame *frame; | |
1254 | ||
1255 | if (sm == NULL) | |
1256 | return -1; | |
1257 | ||
1258 | /* | |
1259 | * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6] | |
1260 | * FT Request action frame body[variable] | |
1261 | */ | |
1262 | ||
1263 | if (len < 14) { | |
1264 | wpa_printf(MSG_DEBUG, "FT: Too short FT Action frame " | |
1265 | "(len=%lu)", (unsigned long) len); | |
1266 | return -1; | |
1267 | } | |
1268 | ||
1269 | action = data[1]; | |
1270 | sta_addr = data + 2; | |
1271 | target_ap = data + 8; | |
1272 | ies = data + 14; | |
1273 | ies_len = len - 14; | |
1274 | ||
1275 | wpa_printf(MSG_DEBUG, "FT: Received FT Action frame (STA=" MACSTR | |
1276 | " Target AP=" MACSTR " Action=%d)", | |
1277 | MAC2STR(sta_addr), MAC2STR(target_ap), action); | |
1278 | ||
1279 | if (os_memcmp(sta_addr, sm->addr, ETH_ALEN) != 0) { | |
1280 | wpa_printf(MSG_DEBUG, "FT: Mismatch in FT Action STA address: " | |
1281 | "STA=" MACSTR " STA-Address=" MACSTR, | |
1282 | MAC2STR(sm->addr), MAC2STR(sta_addr)); | |
1283 | return -1; | |
1284 | } | |
1285 | ||
1286 | /* | |
1287 | * Do some sanity checking on the target AP address (not own and not | |
1288 | * broadcast. This could be extended to filter based on a list of known | |
1289 | * APs in the MD (if such a list were configured). | |
1290 | */ | |
1291 | if ((target_ap[0] & 0x01) || | |
1292 | os_memcmp(target_ap, sm->wpa_auth->addr, ETH_ALEN) == 0) { | |
1293 | wpa_printf(MSG_DEBUG, "FT: Invalid Target AP in FT Action " | |
1294 | "frame"); | |
1295 | return -1; | |
1296 | } | |
1297 | ||
1298 | wpa_hexdump(MSG_MSGDUMP, "FT: Action frame body", ies, ies_len); | |
1299 | ||
1940559e JM |
1300 | if (!sm->wpa_auth->conf.ft_over_ds) { |
1301 | wpa_printf(MSG_DEBUG, "FT: Over-DS option disabled - reject"); | |
1302 | return -1; | |
1303 | } | |
1304 | ||
6fc6879b JM |
1305 | /* RRB - Forward action frame to the target AP */ |
1306 | frame = os_malloc(sizeof(*frame) + len); | |
2c48211c JM |
1307 | if (frame == NULL) |
1308 | return -1; | |
6fc6879b JM |
1309 | frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB; |
1310 | frame->packet_type = FT_PACKET_REQUEST; | |
1311 | frame->action_length = host_to_le16(len); | |
1312 | os_memcpy(frame->ap_address, sm->wpa_auth->addr, ETH_ALEN); | |
1313 | os_memcpy(frame + 1, data, len); | |
1314 | ||
1315 | wpa_ft_rrb_send(sm->wpa_auth, target_ap, (u8 *) frame, | |
1316 | sizeof(*frame) + len); | |
1317 | os_free(frame); | |
1318 | ||
1319 | return 0; | |
1320 | } | |
1321 | ||
1322 | ||
692ec305 JM |
1323 | static void wpa_ft_rrb_rx_request_cb(void *ctx, const u8 *dst, const u8 *bssid, |
1324 | u16 auth_transaction, u16 resp, | |
1325 | const u8 *ies, size_t ies_len) | |
1326 | { | |
1327 | struct wpa_state_machine *sm = ctx; | |
1328 | wpa_printf(MSG_DEBUG, "FT: Over-the-DS RX request cb for " MACSTR, | |
1329 | MAC2STR(sm->addr)); | |
1330 | wpa_ft_send_rrb_auth_resp(sm, sm->ft_pending_current_ap, sm->addr, | |
1331 | WLAN_STATUS_SUCCESS, ies, ies_len); | |
1332 | } | |
1333 | ||
1334 | ||
6fc6879b JM |
1335 | static int wpa_ft_rrb_rx_request(struct wpa_authenticator *wpa_auth, |
1336 | const u8 *current_ap, const u8 *sta_addr, | |
1337 | const u8 *body, size_t len) | |
1338 | { | |
1339 | struct wpa_state_machine *sm; | |
1340 | u16 status; | |
692ec305 JM |
1341 | u8 *resp_ies; |
1342 | size_t resp_ies_len; | |
1343 | int res; | |
6fc6879b JM |
1344 | |
1345 | sm = wpa_ft_add_sta(wpa_auth, sta_addr); | |
1346 | if (sm == NULL) { | |
1347 | wpa_printf(MSG_DEBUG, "FT: Failed to add new STA based on " | |
1348 | "RRB Request"); | |
1349 | return -1; | |
1350 | } | |
1351 | ||
1352 | wpa_hexdump(MSG_MSGDUMP, "FT: RRB Request Frame body", body, len); | |
1353 | ||
692ec305 JM |
1354 | sm->ft_pending_cb = wpa_ft_rrb_rx_request_cb; |
1355 | sm->ft_pending_cb_ctx = sm; | |
1356 | os_memcpy(sm->ft_pending_current_ap, current_ap, ETH_ALEN); | |
1357 | res = wpa_ft_process_auth_req(sm, body, len, &resp_ies, | |
1358 | &resp_ies_len); | |
1359 | if (res < 0) { | |
1360 | wpa_printf(MSG_DEBUG, "FT: No immediate response available - wait for pull response"); | |
1361 | return 0; | |
1362 | } | |
1363 | status = res; | |
1364 | ||
1365 | res = wpa_ft_send_rrb_auth_resp(sm, current_ap, sta_addr, status, | |
1366 | resp_ies, resp_ies_len); | |
1367 | os_free(resp_ies); | |
1368 | return res; | |
1369 | } | |
1370 | ||
1371 | ||
1372 | static int wpa_ft_send_rrb_auth_resp(struct wpa_state_machine *sm, | |
1373 | const u8 *current_ap, const u8 *sta_addr, | |
1374 | u16 status, const u8 *resp_ies, | |
1375 | size_t resp_ies_len) | |
1376 | { | |
1377 | struct wpa_authenticator *wpa_auth = sm->wpa_auth; | |
1378 | size_t rlen; | |
1379 | struct ft_rrb_frame *frame; | |
1380 | u8 *pos; | |
6fc6879b JM |
1381 | |
1382 | wpa_printf(MSG_DEBUG, "FT: RRB authentication response: STA=" MACSTR | |
1383 | " CurrentAP=" MACSTR " status=%d", | |
1384 | MAC2STR(sm->addr), MAC2STR(current_ap), status); | |
1385 | wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len); | |
1386 | ||
1387 | /* RRB - Forward action frame response to the Current AP */ | |
1388 | ||
1389 | /* | |
1390 | * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6] | |
1391 | * Status_Code[2] FT Request action frame body[variable] | |
1392 | */ | |
1393 | rlen = 2 + 2 * ETH_ALEN + 2 + resp_ies_len; | |
1394 | ||
1395 | frame = os_malloc(sizeof(*frame) + rlen); | |
692ec305 | 1396 | if (frame == NULL) |
2c48211c | 1397 | return -1; |
6fc6879b JM |
1398 | frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB; |
1399 | frame->packet_type = FT_PACKET_RESPONSE; | |
1400 | frame->action_length = host_to_le16(rlen); | |
1401 | os_memcpy(frame->ap_address, wpa_auth->addr, ETH_ALEN); | |
1402 | pos = (u8 *) (frame + 1); | |
1403 | *pos++ = WLAN_ACTION_FT; | |
1404 | *pos++ = 2; /* Action: Response */ | |
1405 | os_memcpy(pos, sta_addr, ETH_ALEN); | |
1406 | pos += ETH_ALEN; | |
1407 | os_memcpy(pos, wpa_auth->addr, ETH_ALEN); | |
1408 | pos += ETH_ALEN; | |
1409 | WPA_PUT_LE16(pos, status); | |
1410 | pos += 2; | |
692ec305 | 1411 | if (resp_ies) |
6fc6879b | 1412 | os_memcpy(pos, resp_ies, resp_ies_len); |
6fc6879b JM |
1413 | |
1414 | wpa_ft_rrb_send(wpa_auth, current_ap, (u8 *) frame, | |
1415 | sizeof(*frame) + rlen); | |
1416 | os_free(frame); | |
1417 | ||
1418 | return 0; | |
1419 | } | |
1420 | ||
1421 | ||
1422 | static int wpa_ft_rrb_rx_pull(struct wpa_authenticator *wpa_auth, | |
1423 | const u8 *src_addr, | |
1424 | const u8 *data, size_t data_len) | |
1425 | { | |
76967603 JM |
1426 | struct ft_r0kh_r1kh_pull_frame f; |
1427 | const u8 *crypt; | |
1428 | u8 *plain; | |
6fc6879b JM |
1429 | struct ft_remote_r1kh *r1kh; |
1430 | struct ft_r0kh_r1kh_resp_frame resp, r; | |
1431 | u8 pmk_r0[PMK_LEN]; | |
1b484d60 | 1432 | int pairwise; |
6fc6879b JM |
1433 | |
1434 | wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull"); | |
1435 | ||
76967603 | 1436 | if (data_len < sizeof(f)) |
6fc6879b JM |
1437 | return -1; |
1438 | ||
1439 | r1kh = wpa_auth->conf.r1kh_list; | |
1440 | while (r1kh) { | |
1441 | if (os_memcmp(r1kh->addr, src_addr, ETH_ALEN) == 0) | |
1442 | break; | |
1443 | r1kh = r1kh->next; | |
1444 | } | |
1445 | if (r1kh == NULL) { | |
1446 | wpa_printf(MSG_DEBUG, "FT: No matching R1KH address found for " | |
1447 | "PMK-R1 pull source address " MACSTR, | |
1448 | MAC2STR(src_addr)); | |
1449 | return -1; | |
1450 | } | |
1451 | ||
76967603 JM |
1452 | crypt = data + offsetof(struct ft_r0kh_r1kh_pull_frame, nonce); |
1453 | os_memset(&f, 0, sizeof(f)); | |
1454 | plain = ((u8 *) &f) + offsetof(struct ft_r0kh_r1kh_pull_frame, nonce); | |
6fc6879b JM |
1455 | /* aes_unwrap() does not support inplace decryption, so use a temporary |
1456 | * buffer for the data. */ | |
eefec1e4 JM |
1457 | if (aes_unwrap(r1kh->key, sizeof(r1kh->key), |
1458 | (FT_R0KH_R1KH_PULL_DATA_LEN + 7) / 8, | |
76967603 | 1459 | crypt, plain) < 0) { |
6fc6879b JM |
1460 | wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull " |
1461 | "request from " MACSTR, MAC2STR(src_addr)); | |
1462 | return -1; | |
1463 | } | |
1464 | ||
1465 | wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce", | |
1466 | f.nonce, sizeof(f.nonce)); | |
1467 | wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR0Name", | |
1468 | f.pmk_r0_name, WPA_PMK_NAME_LEN); | |
692ec305 | 1469 | wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR " S1KH-ID=" |
6fc6879b JM |
1470 | MACSTR, MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id)); |
1471 | ||
1472 | os_memset(&resp, 0, sizeof(resp)); | |
1473 | resp.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB; | |
1474 | resp.packet_type = FT_PACKET_R0KH_R1KH_RESP; | |
1475 | resp.data_length = host_to_le16(FT_R0KH_R1KH_RESP_DATA_LEN); | |
1476 | os_memcpy(resp.ap_address, wpa_auth->addr, ETH_ALEN); | |
1477 | ||
1478 | /* aes_wrap() does not support inplace encryption, so use a temporary | |
1479 | * buffer for the data. */ | |
1480 | os_memcpy(r.nonce, f.nonce, sizeof(f.nonce)); | |
1481 | os_memcpy(r.r1kh_id, f.r1kh_id, FT_R1KH_ID_LEN); | |
1482 | os_memcpy(r.s1kh_id, f.s1kh_id, ETH_ALEN); | |
1b484d60 JM |
1483 | if (wpa_ft_fetch_pmk_r0(wpa_auth, f.s1kh_id, f.pmk_r0_name, pmk_r0, |
1484 | &pairwise) < 0) { | |
6fc6879b JM |
1485 | wpa_printf(MSG_DEBUG, "FT: No matching PMKR0Name found for " |
1486 | "PMK-R1 pull"); | |
1487 | return -1; | |
1488 | } | |
1489 | ||
364c064a JM |
1490 | if (wpa_derive_pmk_r1(pmk_r0, f.pmk_r0_name, f.r1kh_id, f.s1kh_id, |
1491 | r.pmk_r1, r.pmk_r1_name) < 0) { | |
1492 | os_memset(pmk_r0, 0, PMK_LEN); | |
1493 | return -1; | |
1494 | } | |
6fc6879b JM |
1495 | wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", r.pmk_r1, PMK_LEN); |
1496 | wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", r.pmk_r1_name, | |
1497 | WPA_PMK_NAME_LEN); | |
e9501a07 | 1498 | r.pairwise = host_to_le16(pairwise); |
5bcd5c5a | 1499 | os_memset(r.pad, 0, sizeof(r.pad)); |
6fc6879b | 1500 | |
eefec1e4 JM |
1501 | if (aes_wrap(r1kh->key, sizeof(r1kh->key), |
1502 | (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8, | |
6fc6879b JM |
1503 | r.nonce, resp.nonce) < 0) { |
1504 | os_memset(pmk_r0, 0, PMK_LEN); | |
1505 | return -1; | |
1506 | } | |
1507 | ||
1508 | os_memset(pmk_r0, 0, PMK_LEN); | |
1509 | ||
1510 | wpa_ft_rrb_send(wpa_auth, src_addr, (u8 *) &resp, sizeof(resp)); | |
1511 | ||
1512 | return 0; | |
1513 | } | |
1514 | ||
1515 | ||
692ec305 JM |
1516 | static void ft_pull_resp_cb_finish(void *eloop_ctx, void *timeout_ctx) |
1517 | { | |
1518 | struct wpa_state_machine *sm = eloop_ctx; | |
1519 | int res; | |
1520 | u8 *resp_ies; | |
1521 | size_t resp_ies_len; | |
1522 | u16 status; | |
1523 | ||
1524 | res = wpa_ft_process_auth_req(sm, wpabuf_head(sm->ft_pending_req_ies), | |
1525 | wpabuf_len(sm->ft_pending_req_ies), | |
1526 | &resp_ies, &resp_ies_len); | |
1527 | wpabuf_free(sm->ft_pending_req_ies); | |
1528 | sm->ft_pending_req_ies = NULL; | |
1529 | if (res < 0) | |
1530 | res = WLAN_STATUS_UNSPECIFIED_FAILURE; | |
1531 | status = res; | |
1532 | wpa_printf(MSG_DEBUG, "FT: Postponed auth callback result for " MACSTR | |
1533 | " - status %u", MAC2STR(sm->addr), status); | |
1534 | ||
1535 | sm->ft_pending_cb(sm->ft_pending_cb_ctx, sm->addr, sm->wpa_auth->addr, | |
1536 | sm->ft_pending_auth_transaction + 1, status, | |
1537 | resp_ies, resp_ies_len); | |
1538 | os_free(resp_ies); | |
1539 | } | |
1540 | ||
1541 | ||
1542 | static int ft_pull_resp_cb(struct wpa_state_machine *sm, void *ctx) | |
1543 | { | |
1544 | struct ft_r0kh_r1kh_resp_frame *frame = ctx; | |
1545 | ||
a8e25dee JM |
1546 | if (os_memcmp(frame->s1kh_id, sm->addr, ETH_ALEN) != 0 || |
1547 | os_memcmp(frame->nonce, sm->ft_pending_pull_nonce, | |
1548 | FT_R0KH_R1KH_PULL_NONCE_LEN) != 0 || | |
1549 | sm->ft_pending_cb == NULL || sm->ft_pending_req_ies == NULL) | |
692ec305 JM |
1550 | return 0; |
1551 | ||
1552 | wpa_printf(MSG_DEBUG, "FT: Response to a pending pull request for " | |
1553 | MACSTR " - process from timeout", MAC2STR(sm->addr)); | |
1554 | eloop_register_timeout(0, 0, ft_pull_resp_cb_finish, sm, NULL); | |
1555 | return 1; | |
1556 | } | |
1557 | ||
1558 | ||
6fc6879b JM |
1559 | static int wpa_ft_rrb_rx_resp(struct wpa_authenticator *wpa_auth, |
1560 | const u8 *src_addr, | |
1561 | const u8 *data, size_t data_len) | |
1562 | { | |
76967603 JM |
1563 | struct ft_r0kh_r1kh_resp_frame f; |
1564 | const u8 *crypt; | |
1565 | u8 *plain; | |
6fc6879b | 1566 | struct ft_remote_r0kh *r0kh; |
692ec305 | 1567 | int pairwise, res; |
6fc6879b JM |
1568 | |
1569 | wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull response"); | |
1570 | ||
76967603 | 1571 | if (data_len < sizeof(f)) |
6fc6879b JM |
1572 | return -1; |
1573 | ||
1574 | r0kh = wpa_auth->conf.r0kh_list; | |
1575 | while (r0kh) { | |
1576 | if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0) | |
1577 | break; | |
1578 | r0kh = r0kh->next; | |
1579 | } | |
1580 | if (r0kh == NULL) { | |
1581 | wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for " | |
1582 | "PMK-R0 pull response source address " MACSTR, | |
1583 | MAC2STR(src_addr)); | |
1584 | return -1; | |
1585 | } | |
1586 | ||
76967603 JM |
1587 | crypt = data + offsetof(struct ft_r0kh_r1kh_resp_frame, nonce); |
1588 | os_memset(&f, 0, sizeof(f)); | |
1589 | plain = ((u8 *) &f) + offsetof(struct ft_r0kh_r1kh_resp_frame, nonce); | |
6fc6879b JM |
1590 | /* aes_unwrap() does not support inplace decryption, so use a temporary |
1591 | * buffer for the data. */ | |
eefec1e4 JM |
1592 | if (aes_unwrap(r0kh->key, sizeof(r0kh->key), |
1593 | (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8, | |
76967603 | 1594 | crypt, plain) < 0) { |
6fc6879b JM |
1595 | wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull " |
1596 | "response from " MACSTR, MAC2STR(src_addr)); | |
1597 | return -1; | |
1598 | } | |
1599 | ||
870834a1 JM |
1600 | if (os_memcmp_const(f.r1kh_id, wpa_auth->conf.r1_key_holder, |
1601 | FT_R1KH_ID_LEN) != 0) { | |
6fc6879b JM |
1602 | wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull response did not use a " |
1603 | "matching R1KH-ID"); | |
1604 | return -1; | |
1605 | } | |
1606 | ||
1b484d60 | 1607 | pairwise = le_to_host16(f.pairwise); |
6fc6879b JM |
1608 | wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce", |
1609 | f.nonce, sizeof(f.nonce)); | |
692ec305 | 1610 | wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR " S1KH-ID=" |
1b484d60 JM |
1611 | MACSTR " pairwise=0x%x", |
1612 | MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id), pairwise); | |
6fc6879b JM |
1613 | wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 pull - PMK-R1", |
1614 | f.pmk_r1, PMK_LEN); | |
1615 | wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR1Name", | |
1616 | f.pmk_r1_name, WPA_PMK_NAME_LEN); | |
1617 | ||
692ec305 JM |
1618 | res = wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name, |
1619 | pairwise); | |
1620 | wpa_printf(MSG_DEBUG, "FT: Look for pending pull request"); | |
1621 | wpa_auth_for_each_sta(wpa_auth, ft_pull_resp_cb, &f); | |
6fc6879b JM |
1622 | os_memset(f.pmk_r1, 0, PMK_LEN); |
1623 | ||
692ec305 | 1624 | return res ? 0 : -1; |
6fc6879b JM |
1625 | } |
1626 | ||
1627 | ||
1628 | static int wpa_ft_rrb_rx_push(struct wpa_authenticator *wpa_auth, | |
1629 | const u8 *src_addr, | |
1630 | const u8 *data, size_t data_len) | |
1631 | { | |
76967603 JM |
1632 | struct ft_r0kh_r1kh_push_frame f; |
1633 | const u8 *crypt; | |
1634 | u8 *plain; | |
6fc6879b JM |
1635 | struct ft_remote_r0kh *r0kh; |
1636 | struct os_time now; | |
1637 | os_time_t tsend; | |
1b484d60 | 1638 | int pairwise; |
6fc6879b JM |
1639 | |
1640 | wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 push"); | |
1641 | ||
76967603 | 1642 | if (data_len < sizeof(f)) |
6fc6879b JM |
1643 | return -1; |
1644 | ||
1645 | r0kh = wpa_auth->conf.r0kh_list; | |
1646 | while (r0kh) { | |
1647 | if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0) | |
1648 | break; | |
1649 | r0kh = r0kh->next; | |
1650 | } | |
1651 | if (r0kh == NULL) { | |
1652 | wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for " | |
1653 | "PMK-R0 push source address " MACSTR, | |
1654 | MAC2STR(src_addr)); | |
1655 | return -1; | |
1656 | } | |
1657 | ||
76967603 JM |
1658 | crypt = data + offsetof(struct ft_r0kh_r1kh_push_frame, timestamp); |
1659 | os_memset(&f, 0, sizeof(f)); | |
1660 | plain = ((u8 *) &f) + offsetof(struct ft_r0kh_r1kh_push_frame, | |
1661 | timestamp); | |
6fc6879b JM |
1662 | /* aes_unwrap() does not support inplace decryption, so use a temporary |
1663 | * buffer for the data. */ | |
eefec1e4 JM |
1664 | if (aes_unwrap(r0kh->key, sizeof(r0kh->key), |
1665 | (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8, | |
76967603 | 1666 | crypt, plain) < 0) { |
6fc6879b JM |
1667 | wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 push from " |
1668 | MACSTR, MAC2STR(src_addr)); | |
1669 | return -1; | |
1670 | } | |
1671 | ||
1672 | os_get_time(&now); | |
1673 | tsend = WPA_GET_LE32(f.timestamp); | |
1674 | if ((now.sec > tsend && now.sec - tsend > 60) || | |
1675 | (now.sec < tsend && tsend - now.sec > 60)) { | |
1676 | wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not have a valid " | |
1677 | "timestamp: sender time %d own time %d\n", | |
1678 | (int) tsend, (int) now.sec); | |
1679 | return -1; | |
1680 | } | |
1681 | ||
870834a1 JM |
1682 | if (os_memcmp_const(f.r1kh_id, wpa_auth->conf.r1_key_holder, |
1683 | FT_R1KH_ID_LEN) != 0) { | |
6fc6879b JM |
1684 | wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not use a matching " |
1685 | "R1KH-ID (received " MACSTR " own " MACSTR ")", | |
1686 | MAC2STR(f.r1kh_id), | |
1687 | MAC2STR(wpa_auth->conf.r1_key_holder)); | |
1688 | return -1; | |
1689 | } | |
1690 | ||
1b484d60 | 1691 | pairwise = le_to_host16(f.pairwise); |
6fc6879b | 1692 | wpa_printf(MSG_DEBUG, "FT: PMK-R1 push - R1KH-ID=" MACSTR " S1KH-ID=" |
1b484d60 JM |
1693 | MACSTR " pairwise=0x%x", |
1694 | MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id), pairwise); | |
6fc6879b JM |
1695 | wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 push - PMK-R1", |
1696 | f.pmk_r1, PMK_LEN); | |
1697 | wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 push - PMKR1Name", | |
1698 | f.pmk_r1_name, WPA_PMK_NAME_LEN); | |
1699 | ||
1b484d60 JM |
1700 | wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name, |
1701 | pairwise); | |
6fc6879b JM |
1702 | os_memset(f.pmk_r1, 0, PMK_LEN); |
1703 | ||
1704 | return 0; | |
1705 | } | |
1706 | ||
1707 | ||
1708 | int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr, | |
1709 | const u8 *data, size_t data_len) | |
1710 | { | |
1711 | struct ft_rrb_frame *frame; | |
1712 | u16 alen; | |
1713 | const u8 *pos, *end, *start; | |
1714 | u8 action; | |
1715 | const u8 *sta_addr, *target_ap_addr; | |
1716 | ||
1717 | wpa_printf(MSG_DEBUG, "FT: RRB received frame from remote AP " MACSTR, | |
1718 | MAC2STR(src_addr)); | |
1719 | ||
1720 | if (data_len < sizeof(*frame)) { | |
1721 | wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (data_len=%lu)", | |
1722 | (unsigned long) data_len); | |
1723 | return -1; | |
1724 | } | |
1725 | ||
1726 | pos = data; | |
1727 | frame = (struct ft_rrb_frame *) pos; | |
1728 | pos += sizeof(*frame); | |
1729 | ||
1730 | alen = le_to_host16(frame->action_length); | |
1731 | wpa_printf(MSG_DEBUG, "FT: RRB frame - frame_type=%d packet_type=%d " | |
1732 | "action_length=%d ap_address=" MACSTR, | |
1733 | frame->frame_type, frame->packet_type, alen, | |
1734 | MAC2STR(frame->ap_address)); | |
1735 | ||
1736 | if (frame->frame_type != RSN_REMOTE_FRAME_TYPE_FT_RRB) { | |
c1e033b0 | 1737 | /* Discard frame per IEEE Std 802.11r-2008, 11A.10.3 */ |
6fc6879b JM |
1738 | wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with " |
1739 | "unrecognized type %d", frame->frame_type); | |
1740 | return -1; | |
1741 | } | |
1742 | ||
1743 | if (alen > data_len - sizeof(*frame)) { | |
1744 | wpa_printf(MSG_DEBUG, "FT: RRB frame too short for action " | |
1745 | "frame"); | |
1746 | return -1; | |
1747 | } | |
1748 | ||
1749 | if (frame->packet_type == FT_PACKET_R0KH_R1KH_PULL) | |
1750 | return wpa_ft_rrb_rx_pull(wpa_auth, src_addr, data, data_len); | |
1751 | if (frame->packet_type == FT_PACKET_R0KH_R1KH_RESP) | |
1752 | return wpa_ft_rrb_rx_resp(wpa_auth, src_addr, data, data_len); | |
1753 | if (frame->packet_type == FT_PACKET_R0KH_R1KH_PUSH) | |
1754 | return wpa_ft_rrb_rx_push(wpa_auth, src_addr, data, data_len); | |
1755 | ||
1756 | wpa_hexdump(MSG_MSGDUMP, "FT: RRB - FT Action frame", pos, alen); | |
1757 | ||
1758 | if (alen < 1 + 1 + 2 * ETH_ALEN) { | |
1759 | wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (not enough " | |
1760 | "room for Action Frame body); alen=%lu", | |
1761 | (unsigned long) alen); | |
1762 | return -1; | |
1763 | } | |
1764 | start = pos; | |
1765 | end = pos + alen; | |
1766 | ||
1767 | if (*pos != WLAN_ACTION_FT) { | |
1768 | wpa_printf(MSG_DEBUG, "FT: Unexpected Action frame category " | |
1769 | "%d", *pos); | |
1770 | return -1; | |
1771 | } | |
1772 | ||
1773 | pos++; | |
1774 | action = *pos++; | |
1775 | sta_addr = pos; | |
1776 | pos += ETH_ALEN; | |
1777 | target_ap_addr = pos; | |
1778 | pos += ETH_ALEN; | |
1779 | wpa_printf(MSG_DEBUG, "FT: RRB Action Frame: action=%d sta_addr=" | |
1780 | MACSTR " target_ap_addr=" MACSTR, | |
1781 | action, MAC2STR(sta_addr), MAC2STR(target_ap_addr)); | |
1782 | ||
1783 | if (frame->packet_type == FT_PACKET_REQUEST) { | |
1784 | wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Request"); | |
1785 | ||
1786 | if (action != 1) { | |
1787 | wpa_printf(MSG_DEBUG, "FT: Unexpected Action %d in " | |
1788 | "RRB Request", action); | |
1789 | return -1; | |
1790 | } | |
1791 | ||
1792 | if (os_memcmp(target_ap_addr, wpa_auth->addr, ETH_ALEN) != 0) { | |
1793 | wpa_printf(MSG_DEBUG, "FT: Target AP address in the " | |
1794 | "RRB Request does not match with own " | |
1795 | "address"); | |
1796 | return -1; | |
1797 | } | |
1798 | ||
1799 | if (wpa_ft_rrb_rx_request(wpa_auth, frame->ap_address, | |
1800 | sta_addr, pos, end - pos) < 0) | |
1801 | return -1; | |
1802 | } else if (frame->packet_type == FT_PACKET_RESPONSE) { | |
1803 | u16 status_code; | |
1804 | ||
1805 | if (end - pos < 2) { | |
1806 | wpa_printf(MSG_DEBUG, "FT: Not enough room for status " | |
1807 | "code in RRB Response"); | |
1808 | return -1; | |
1809 | } | |
1810 | status_code = WPA_GET_LE16(pos); | |
1811 | pos += 2; | |
1812 | ||
1813 | wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Response " | |
1814 | "(status_code=%d)", status_code); | |
1815 | ||
1816 | if (wpa_ft_action_send(wpa_auth, sta_addr, start, alen) < 0) | |
1817 | return -1; | |
1818 | } else { | |
1819 | wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with unknown " | |
1820 | "packet_type %d", frame->packet_type); | |
1821 | return -1; | |
1822 | } | |
1823 | ||
164a453f JM |
1824 | if (end > pos) { |
1825 | wpa_hexdump(MSG_DEBUG, "FT: Ignore extra data in end", | |
1826 | pos, end - pos); | |
1827 | } | |
1828 | ||
6fc6879b JM |
1829 | return 0; |
1830 | } | |
1831 | ||
1832 | ||
364c064a JM |
1833 | static int wpa_ft_generate_pmk_r1(struct wpa_authenticator *wpa_auth, |
1834 | struct wpa_ft_pmk_r0_sa *pmk_r0, | |
1835 | struct ft_remote_r1kh *r1kh, | |
1836 | const u8 *s1kh_id, int pairwise) | |
6fc6879b JM |
1837 | { |
1838 | struct ft_r0kh_r1kh_push_frame frame, f; | |
1839 | struct os_time now; | |
369d07af JM |
1840 | const u8 *plain; |
1841 | u8 *crypt; | |
6fc6879b JM |
1842 | |
1843 | os_memset(&frame, 0, sizeof(frame)); | |
1844 | frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB; | |
1845 | frame.packet_type = FT_PACKET_R0KH_R1KH_PUSH; | |
1846 | frame.data_length = host_to_le16(FT_R0KH_R1KH_PUSH_DATA_LEN); | |
1847 | os_memcpy(frame.ap_address, wpa_auth->addr, ETH_ALEN); | |
1848 | ||
1849 | /* aes_wrap() does not support inplace encryption, so use a temporary | |
1850 | * buffer for the data. */ | |
1851 | os_memcpy(f.r1kh_id, r1kh->id, FT_R1KH_ID_LEN); | |
1852 | os_memcpy(f.s1kh_id, s1kh_id, ETH_ALEN); | |
1853 | os_memcpy(f.pmk_r0_name, pmk_r0->pmk_r0_name, WPA_PMK_NAME_LEN); | |
364c064a JM |
1854 | if (wpa_derive_pmk_r1(pmk_r0->pmk_r0, pmk_r0->pmk_r0_name, r1kh->id, |
1855 | s1kh_id, f.pmk_r1, f.pmk_r1_name) < 0) | |
1856 | return -1; | |
6fc6879b JM |
1857 | wpa_printf(MSG_DEBUG, "FT: R1KH-ID " MACSTR, MAC2STR(r1kh->id)); |
1858 | wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", f.pmk_r1, PMK_LEN); | |
1859 | wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", f.pmk_r1_name, | |
1860 | WPA_PMK_NAME_LEN); | |
1861 | os_get_time(&now); | |
1862 | WPA_PUT_LE32(f.timestamp, now.sec); | |
e9501a07 | 1863 | f.pairwise = host_to_le16(pairwise); |
5bcd5c5a | 1864 | os_memset(f.pad, 0, sizeof(f.pad)); |
369d07af JM |
1865 | plain = ((const u8 *) &f) + offsetof(struct ft_r0kh_r1kh_push_frame, |
1866 | timestamp); | |
1867 | crypt = ((u8 *) &frame) + offsetof(struct ft_r0kh_r1kh_push_frame, | |
1868 | timestamp); | |
eefec1e4 JM |
1869 | if (aes_wrap(r1kh->key, sizeof(r1kh->key), |
1870 | (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8, | |
369d07af | 1871 | plain, crypt) < 0) |
364c064a | 1872 | return -1; |
6fc6879b JM |
1873 | |
1874 | wpa_ft_rrb_send(wpa_auth, r1kh->addr, (u8 *) &frame, sizeof(frame)); | |
364c064a | 1875 | return 0; |
6fc6879b JM |
1876 | } |
1877 | ||
1878 | ||
1879 | void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr) | |
1880 | { | |
1881 | struct wpa_ft_pmk_r0_sa *r0; | |
1882 | struct ft_remote_r1kh *r1kh; | |
1883 | ||
1884 | if (!wpa_auth->conf.pmk_r1_push) | |
1885 | return; | |
1886 | ||
1887 | r0 = wpa_auth->ft_pmk_cache->pmk_r0; | |
1888 | while (r0) { | |
1889 | if (os_memcmp(r0->spa, addr, ETH_ALEN) == 0) | |
1890 | break; | |
1891 | r0 = r0->next; | |
1892 | } | |
1893 | ||
1894 | if (r0 == NULL || r0->pmk_r1_pushed) | |
1895 | return; | |
1896 | r0->pmk_r1_pushed = 1; | |
1897 | ||
1898 | wpa_printf(MSG_DEBUG, "FT: Deriving and pushing PMK-R1 keys to R1KHs " | |
1899 | "for STA " MACSTR, MAC2STR(addr)); | |
1900 | ||
1901 | r1kh = wpa_auth->conf.r1kh_list; | |
1902 | while (r1kh) { | |
1b484d60 | 1903 | wpa_ft_generate_pmk_r1(wpa_auth, r0, r1kh, addr, r0->pairwise); |
6fc6879b JM |
1904 | r1kh = r1kh->next; |
1905 | } | |
1906 | } | |
1907 | ||
4ec1fd8e | 1908 | #endif /* CONFIG_IEEE80211R_AP */ |