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6fc6879b JM |
1 | /* |
2 | * WPA Supplicant - WPA state machine and EAPOL-Key processing | |
96efeeb6 | 3 | * Copyright (c) 2003-2012, 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 | ||
9 | #include "includes.h" | |
10 | ||
11 | #include "common.h" | |
03da66bd JM |
12 | #include "crypto/aes_wrap.h" |
13 | #include "crypto/crypto.h" | |
3642c431 | 14 | #include "crypto/random.h" |
03da66bd JM |
15 | #include "common/ieee802_11_defs.h" |
16 | #include "eapol_supp/eapol_supp_sm.h" | |
6fc6879b JM |
17 | #include "wpa.h" |
18 | #include "eloop.h" | |
6fc6879b JM |
19 | #include "preauth.h" |
20 | #include "pmksa_cache.h" | |
21 | #include "wpa_i.h" | |
22 | #include "wpa_ie.h" | |
23 | #include "peerkey.h" | |
6fc6879b JM |
24 | |
25 | ||
6fc6879b JM |
26 | /** |
27 | * wpa_eapol_key_send - Send WPA/RSN EAPOL-Key message | |
28 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
29 | * @kck: Key Confirmation Key (KCK, part of PTK) | |
30 | * @ver: Version field from Key Info | |
31 | * @dest: Destination address for the frame | |
32 | * @proto: Ethertype (usually ETH_P_EAPOL) | |
33 | * @msg: EAPOL-Key message | |
34 | * @msg_len: Length of message | |
35 | * @key_mic: Pointer to the buffer to which the EAPOL-Key MIC is written | |
36 | */ | |
37 | void wpa_eapol_key_send(struct wpa_sm *sm, const u8 *kck, | |
38 | int ver, const u8 *dest, u16 proto, | |
39 | u8 *msg, size_t msg_len, u8 *key_mic) | |
40 | { | |
a8e16edc | 41 | if (is_zero_ether_addr(dest) && is_zero_ether_addr(sm->bssid)) { |
6fc6879b JM |
42 | /* |
43 | * Association event was not yet received; try to fetch | |
44 | * BSSID from the driver. | |
45 | */ | |
46 | if (wpa_sm_get_bssid(sm, sm->bssid) < 0) { | |
f049052b BG |
47 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
48 | "WPA: Failed to read BSSID for " | |
49 | "EAPOL-Key destination address"); | |
6fc6879b JM |
50 | } else { |
51 | dest = sm->bssid; | |
f049052b BG |
52 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
53 | "WPA: Use BSSID (" MACSTR | |
54 | ") as the destination for EAPOL-Key", | |
55 | MAC2STR(dest)); | |
6fc6879b JM |
56 | } |
57 | } | |
04b6b3ed | 58 | if (key_mic && |
929a2ea5 | 59 | wpa_eapol_key_mic(kck, sm->key_mgmt, ver, msg, msg_len, key_mic)) { |
f049052b | 60 | wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, |
929a2ea5 JM |
61 | "WPA: Failed to generate EAPOL-Key version %d key_mgmt 0x%x MIC", |
62 | ver, sm->key_mgmt); | |
04b6b3ed JM |
63 | goto out; |
64 | } | |
bc8318ac JM |
65 | wpa_hexdump_key(MSG_DEBUG, "WPA: KCK", kck, 16); |
66 | wpa_hexdump(MSG_DEBUG, "WPA: Derived Key MIC", key_mic, 16); | |
6fc6879b JM |
67 | wpa_hexdump(MSG_MSGDUMP, "WPA: TX EAPOL-Key", msg, msg_len); |
68 | wpa_sm_ether_send(sm, dest, proto, msg, msg_len); | |
69 | eapol_sm_notify_tx_eapol_key(sm->eapol); | |
04b6b3ed | 70 | out: |
6fc6879b JM |
71 | os_free(msg); |
72 | } | |
73 | ||
74 | ||
75 | /** | |
76 | * wpa_sm_key_request - Send EAPOL-Key Request | |
77 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
78 | * @error: Indicate whether this is an Michael MIC error report | |
79 | * @pairwise: 1 = error report for pairwise packet, 0 = for group packet | |
6fc6879b JM |
80 | * |
81 | * Send an EAPOL-Key Request to the current authenticator. This function is | |
82 | * used to request rekeying and it is usually called when a local Michael MIC | |
83 | * failure is detected. | |
84 | */ | |
85 | void wpa_sm_key_request(struct wpa_sm *sm, int error, int pairwise) | |
86 | { | |
87 | size_t rlen; | |
88 | struct wpa_eapol_key *reply; | |
89 | int key_info, ver; | |
90 | u8 bssid[ETH_ALEN], *rbuf; | |
91 | ||
929a2ea5 JM |
92 | if (sm->key_mgmt == WPA_KEY_MGMT_OSEN || |
93 | wpa_key_mgmt_suite_b(sm->key_mgmt)) | |
df0f01d9 JM |
94 | ver = WPA_KEY_INFO_TYPE_AKM_DEFINED; |
95 | else if (wpa_key_mgmt_ft(sm->key_mgmt) || | |
96 | wpa_key_mgmt_sha256(sm->key_mgmt)) | |
6fc6879b | 97 | ver = WPA_KEY_INFO_TYPE_AES_128_CMAC; |
eb7719ff | 98 | else if (sm->pairwise_cipher != WPA_CIPHER_TKIP) |
6fc6879b JM |
99 | ver = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES; |
100 | else | |
101 | ver = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4; | |
102 | ||
103 | if (wpa_sm_get_bssid(sm, bssid) < 0) { | |
f049052b BG |
104 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
105 | "Failed to read BSSID for EAPOL-Key request"); | |
6fc6879b JM |
106 | return; |
107 | } | |
108 | ||
109 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, | |
110 | sizeof(*reply), &rlen, (void *) &reply); | |
111 | if (rbuf == NULL) | |
112 | return; | |
113 | ||
a14896e8 JM |
114 | reply->type = (sm->proto == WPA_PROTO_RSN || |
115 | sm->proto == WPA_PROTO_OSEN) ? | |
6fc6879b JM |
116 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; |
117 | key_info = WPA_KEY_INFO_REQUEST | ver; | |
118 | if (sm->ptk_set) | |
119 | key_info |= WPA_KEY_INFO_MIC; | |
120 | if (error) | |
121 | key_info |= WPA_KEY_INFO_ERROR; | |
122 | if (pairwise) | |
123 | key_info |= WPA_KEY_INFO_KEY_TYPE; | |
124 | WPA_PUT_BE16(reply->key_info, key_info); | |
125 | WPA_PUT_BE16(reply->key_length, 0); | |
126 | os_memcpy(reply->replay_counter, sm->request_counter, | |
127 | WPA_REPLAY_COUNTER_LEN); | |
128 | inc_byte_array(sm->request_counter, WPA_REPLAY_COUNTER_LEN); | |
129 | ||
130 | WPA_PUT_BE16(reply->key_data_length, 0); | |
131 | ||
f049052b BG |
132 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
133 | "WPA: Sending EAPOL-Key Request (error=%d " | |
134 | "pairwise=%d ptk_set=%d len=%lu)", | |
135 | error, pairwise, sm->ptk_set, (unsigned long) rlen); | |
6fc6879b JM |
136 | wpa_eapol_key_send(sm, sm->ptk.kck, ver, bssid, ETH_P_EAPOL, |
137 | rbuf, rlen, key_info & WPA_KEY_INFO_MIC ? | |
138 | reply->key_mic : NULL); | |
139 | } | |
140 | ||
141 | ||
b41f2684 CL |
142 | static void wpa_supplicant_key_mgmt_set_pmk(struct wpa_sm *sm) |
143 | { | |
144 | #ifdef CONFIG_IEEE80211R | |
145 | if (sm->key_mgmt == WPA_KEY_MGMT_FT_IEEE8021X) { | |
146 | if (wpa_sm_key_mgmt_set_pmk(sm, sm->xxkey, sm->xxkey_len)) | |
147 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
148 | "RSN: Cannot set low order 256 bits of MSK for key management offload"); | |
149 | } else { | |
150 | #endif /* CONFIG_IEEE80211R */ | |
151 | if (wpa_sm_key_mgmt_set_pmk(sm, sm->pmk, sm->pmk_len)) | |
152 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
153 | "RSN: Cannot set PMK for key management offload"); | |
154 | #ifdef CONFIG_IEEE80211R | |
155 | } | |
156 | #endif /* CONFIG_IEEE80211R */ | |
157 | } | |
158 | ||
159 | ||
6fc6879b JM |
160 | static int wpa_supplicant_get_pmk(struct wpa_sm *sm, |
161 | const unsigned char *src_addr, | |
162 | const u8 *pmkid) | |
163 | { | |
164 | int abort_cached = 0; | |
165 | ||
166 | if (pmkid && !sm->cur_pmksa) { | |
167 | /* When using drivers that generate RSN IE, wpa_supplicant may | |
168 | * not have enough time to get the association information | |
169 | * event before receiving this 1/4 message, so try to find a | |
170 | * matching PMKSA cache entry here. */ | |
96efeeb6 JM |
171 | sm->cur_pmksa = pmksa_cache_get(sm->pmksa, src_addr, pmkid, |
172 | NULL); | |
6fc6879b | 173 | if (sm->cur_pmksa) { |
f049052b BG |
174 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
175 | "RSN: found matching PMKID from PMKSA cache"); | |
6fc6879b | 176 | } else { |
f049052b BG |
177 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
178 | "RSN: no matching PMKID found"); | |
6fc6879b JM |
179 | abort_cached = 1; |
180 | } | |
181 | } | |
182 | ||
183 | if (pmkid && sm->cur_pmksa && | |
0d15b69f | 184 | os_memcmp_const(pmkid, sm->cur_pmksa->pmkid, PMKID_LEN) == 0) { |
6fc6879b JM |
185 | wpa_hexdump(MSG_DEBUG, "RSN: matched PMKID", pmkid, PMKID_LEN); |
186 | wpa_sm_set_pmk_from_pmksa(sm); | |
187 | wpa_hexdump_key(MSG_DEBUG, "RSN: PMK from PMKSA cache", | |
188 | sm->pmk, sm->pmk_len); | |
189 | eapol_sm_notify_cached(sm->eapol); | |
190 | #ifdef CONFIG_IEEE80211R | |
191 | sm->xxkey_len = 0; | |
192 | #endif /* CONFIG_IEEE80211R */ | |
56586197 | 193 | } else if (wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) && sm->eapol) { |
6fc6879b JM |
194 | int res, pmk_len; |
195 | pmk_len = PMK_LEN; | |
196 | res = eapol_sm_get_key(sm->eapol, sm->pmk, PMK_LEN); | |
197 | if (res) { | |
198 | /* | |
199 | * EAP-LEAP is an exception from other EAP methods: it | |
200 | * uses only 16-byte PMK. | |
201 | */ | |
202 | res = eapol_sm_get_key(sm->eapol, sm->pmk, 16); | |
203 | pmk_len = 16; | |
204 | } else { | |
205 | #ifdef CONFIG_IEEE80211R | |
206 | u8 buf[2 * PMK_LEN]; | |
207 | if (eapol_sm_get_key(sm->eapol, buf, 2 * PMK_LEN) == 0) | |
208 | { | |
209 | os_memcpy(sm->xxkey, buf + PMK_LEN, PMK_LEN); | |
210 | sm->xxkey_len = PMK_LEN; | |
211 | os_memset(buf, 0, sizeof(buf)); | |
212 | } | |
213 | #endif /* CONFIG_IEEE80211R */ | |
214 | } | |
215 | if (res == 0) { | |
a7f10d65 | 216 | struct rsn_pmksa_cache_entry *sa = NULL; |
6fc6879b JM |
217 | wpa_hexdump_key(MSG_DEBUG, "WPA: PMK from EAPOL state " |
218 | "machines", sm->pmk, pmk_len); | |
219 | sm->pmk_len = pmk_len; | |
b41f2684 | 220 | wpa_supplicant_key_mgmt_set_pmk(sm); |
715ed737 | 221 | if (sm->proto == WPA_PROTO_RSN && |
087a1f4e | 222 | !wpa_key_mgmt_suite_b(sm->key_mgmt) && |
715ed737 | 223 | !wpa_key_mgmt_ft(sm->key_mgmt)) { |
a7f10d65 JM |
224 | sa = pmksa_cache_add(sm->pmksa, |
225 | sm->pmk, pmk_len, | |
087a1f4e | 226 | NULL, 0, |
a7f10d65 JM |
227 | src_addr, sm->own_addr, |
228 | sm->network_ctx, | |
229 | sm->key_mgmt); | |
f5a51b58 | 230 | } |
6fc6879b | 231 | if (!sm->cur_pmksa && pmkid && |
96efeeb6 JM |
232 | pmksa_cache_get(sm->pmksa, src_addr, pmkid, NULL)) |
233 | { | |
f049052b BG |
234 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
235 | "RSN: the new PMK matches with the " | |
236 | "PMKID"); | |
6fc6879b JM |
237 | abort_cached = 0; |
238 | } | |
a7f10d65 JM |
239 | |
240 | if (!sm->cur_pmksa) | |
241 | sm->cur_pmksa = sa; | |
6fc6879b | 242 | } else { |
0f057fb2 | 243 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
6fc6879b | 244 | "WPA: Failed to get master session key from " |
f049052b BG |
245 | "EAPOL state machines - key handshake " |
246 | "aborted"); | |
6fc6879b | 247 | if (sm->cur_pmksa) { |
f049052b BG |
248 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
249 | "RSN: Cancelled PMKSA caching " | |
250 | "attempt"); | |
6fc6879b JM |
251 | sm->cur_pmksa = NULL; |
252 | abort_cached = 1; | |
1ac2d4a9 | 253 | } else if (!abort_cached) { |
6fc6879b JM |
254 | return -1; |
255 | } | |
256 | } | |
257 | } | |
258 | ||
715ed737 | 259 | if (abort_cached && wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) && |
087a1f4e | 260 | !wpa_key_mgmt_suite_b(sm->key_mgmt) && |
a14896e8 JM |
261 | !wpa_key_mgmt_ft(sm->key_mgmt) && sm->key_mgmt != WPA_KEY_MGMT_OSEN) |
262 | { | |
6fc6879b JM |
263 | /* Send EAPOL-Start to trigger full EAP authentication. */ |
264 | u8 *buf; | |
265 | size_t buflen; | |
266 | ||
f049052b BG |
267 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
268 | "RSN: no PMKSA entry found - trigger " | |
269 | "full EAP authentication"); | |
6fc6879b JM |
270 | buf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_START, |
271 | NULL, 0, &buflen, NULL); | |
272 | if (buf) { | |
273 | wpa_sm_ether_send(sm, sm->bssid, ETH_P_EAPOL, | |
274 | buf, buflen); | |
275 | os_free(buf); | |
b4a1256d | 276 | return -2; |
6fc6879b JM |
277 | } |
278 | ||
279 | return -1; | |
280 | } | |
281 | ||
282 | return 0; | |
283 | } | |
284 | ||
285 | ||
286 | /** | |
287 | * wpa_supplicant_send_2_of_4 - Send message 2 of WPA/RSN 4-Way Handshake | |
288 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
289 | * @dst: Destination address for the frame | |
290 | * @key: Pointer to the EAPOL-Key frame header | |
291 | * @ver: Version bits from EAPOL-Key Key Info | |
292 | * @nonce: Nonce value for the EAPOL-Key frame | |
293 | * @wpa_ie: WPA/RSN IE | |
294 | * @wpa_ie_len: Length of the WPA/RSN IE | |
295 | * @ptk: PTK to use for keyed hash and encryption | |
296 | * Returns: 0 on success, -1 on failure | |
297 | */ | |
298 | int wpa_supplicant_send_2_of_4(struct wpa_sm *sm, const unsigned char *dst, | |
299 | const struct wpa_eapol_key *key, | |
300 | int ver, const u8 *nonce, | |
301 | const u8 *wpa_ie, size_t wpa_ie_len, | |
302 | struct wpa_ptk *ptk) | |
303 | { | |
304 | size_t rlen; | |
305 | struct wpa_eapol_key *reply; | |
306 | u8 *rbuf; | |
26e23750 | 307 | u8 *rsn_ie_buf = NULL; |
6fc6879b JM |
308 | |
309 | if (wpa_ie == NULL) { | |
f049052b BG |
310 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No wpa_ie set - " |
311 | "cannot generate msg 2/4"); | |
6fc6879b JM |
312 | return -1; |
313 | } | |
314 | ||
26e23750 JM |
315 | #ifdef CONFIG_IEEE80211R |
316 | if (wpa_key_mgmt_ft(sm->key_mgmt)) { | |
317 | int res; | |
318 | ||
55046414 JM |
319 | /* |
320 | * Add PMKR1Name into RSN IE (PMKID-List) and add MDIE and | |
321 | * FTIE from (Re)Association Response. | |
322 | */ | |
323 | rsn_ie_buf = os_malloc(wpa_ie_len + 2 + 2 + PMKID_LEN + | |
324 | sm->assoc_resp_ies_len); | |
26e23750 JM |
325 | if (rsn_ie_buf == NULL) |
326 | return -1; | |
327 | os_memcpy(rsn_ie_buf, wpa_ie, wpa_ie_len); | |
328 | res = wpa_insert_pmkid(rsn_ie_buf, wpa_ie_len, | |
329 | sm->pmk_r1_name); | |
330 | if (res < 0) { | |
331 | os_free(rsn_ie_buf); | |
332 | return -1; | |
333 | } | |
55046414 JM |
334 | wpa_ie_len += res; |
335 | ||
336 | if (sm->assoc_resp_ies) { | |
337 | os_memcpy(rsn_ie_buf + wpa_ie_len, sm->assoc_resp_ies, | |
338 | sm->assoc_resp_ies_len); | |
339 | wpa_ie_len += sm->assoc_resp_ies_len; | |
340 | } | |
26e23750 JM |
341 | |
342 | wpa_ie = rsn_ie_buf; | |
26e23750 JM |
343 | } |
344 | #endif /* CONFIG_IEEE80211R */ | |
345 | ||
6fc6879b JM |
346 | wpa_hexdump(MSG_DEBUG, "WPA: WPA IE for msg 2/4", wpa_ie, wpa_ie_len); |
347 | ||
348 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, | |
349 | NULL, sizeof(*reply) + wpa_ie_len, | |
350 | &rlen, (void *) &reply); | |
26e23750 JM |
351 | if (rbuf == NULL) { |
352 | os_free(rsn_ie_buf); | |
6fc6879b | 353 | return -1; |
26e23750 | 354 | } |
6fc6879b | 355 | |
a14896e8 JM |
356 | reply->type = (sm->proto == WPA_PROTO_RSN || |
357 | sm->proto == WPA_PROTO_OSEN) ? | |
6fc6879b JM |
358 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; |
359 | WPA_PUT_BE16(reply->key_info, | |
360 | ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_MIC); | |
a14896e8 | 361 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) |
6fc6879b JM |
362 | WPA_PUT_BE16(reply->key_length, 0); |
363 | else | |
364 | os_memcpy(reply->key_length, key->key_length, 2); | |
365 | os_memcpy(reply->replay_counter, key->replay_counter, | |
366 | WPA_REPLAY_COUNTER_LEN); | |
bc8318ac JM |
367 | wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter", reply->replay_counter, |
368 | WPA_REPLAY_COUNTER_LEN); | |
6fc6879b JM |
369 | |
370 | WPA_PUT_BE16(reply->key_data_length, wpa_ie_len); | |
371 | os_memcpy(reply + 1, wpa_ie, wpa_ie_len); | |
26e23750 | 372 | os_free(rsn_ie_buf); |
6fc6879b JM |
373 | |
374 | os_memcpy(reply->key_nonce, nonce, WPA_NONCE_LEN); | |
375 | ||
f049052b | 376 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/4"); |
6fc6879b JM |
377 | wpa_eapol_key_send(sm, ptk->kck, ver, dst, ETH_P_EAPOL, |
378 | rbuf, rlen, reply->key_mic); | |
379 | ||
380 | return 0; | |
381 | } | |
382 | ||
383 | ||
384 | static int wpa_derive_ptk(struct wpa_sm *sm, const unsigned char *src_addr, | |
385 | const struct wpa_eapol_key *key, | |
386 | struct wpa_ptk *ptk) | |
387 | { | |
3b9c5176 | 388 | size_t ptk_len = wpa_cipher_key_len(sm->pairwise_cipher) + 32; |
6fc6879b | 389 | #ifdef CONFIG_IEEE80211R |
56586197 | 390 | if (wpa_key_mgmt_ft(sm->key_mgmt)) |
c0a61908 | 391 | return wpa_derive_ptk_ft(sm, src_addr, key, ptk, ptk_len); |
6fc6879b JM |
392 | #endif /* CONFIG_IEEE80211R */ |
393 | ||
394 | wpa_pmk_to_ptk(sm->pmk, sm->pmk_len, "Pairwise key expansion", | |
395 | sm->own_addr, sm->bssid, sm->snonce, key->key_nonce, | |
c0a61908 | 396 | (u8 *) ptk, ptk_len, |
56586197 | 397 | wpa_key_mgmt_sha256(sm->key_mgmt)); |
6fc6879b JM |
398 | return 0; |
399 | } | |
400 | ||
401 | ||
402 | static void wpa_supplicant_process_1_of_4(struct wpa_sm *sm, | |
403 | const unsigned char *src_addr, | |
404 | const struct wpa_eapol_key *key, | |
e6270129 JM |
405 | u16 ver, const u8 *key_data, |
406 | size_t key_data_len) | |
6fc6879b JM |
407 | { |
408 | struct wpa_eapol_ie_parse ie; | |
409 | struct wpa_ptk *ptk; | |
b4a1256d | 410 | int res; |
25ef8529 JM |
411 | u8 *kde, *kde_buf = NULL; |
412 | size_t kde_len; | |
6fc6879b JM |
413 | |
414 | if (wpa_sm_get_network_ctx(sm) == NULL) { | |
f049052b BG |
415 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No SSID info " |
416 | "found (msg 1 of 4)"); | |
6fc6879b JM |
417 | return; |
418 | } | |
419 | ||
420 | wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE); | |
f049052b BG |
421 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of 4-Way " |
422 | "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver); | |
6fc6879b JM |
423 | |
424 | os_memset(&ie, 0, sizeof(ie)); | |
425 | ||
a14896e8 | 426 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { |
6fc6879b | 427 | /* RSN: msg 1/4 should contain PMKID for the selected PMK */ |
e6270129 JM |
428 | wpa_hexdump(MSG_DEBUG, "RSN: msg 1/4 key data", |
429 | key_data, key_data_len); | |
430 | if (wpa_supplicant_parse_ies(key_data, key_data_len, &ie) < 0) | |
d627a939 | 431 | goto failed; |
6fc6879b JM |
432 | if (ie.pmkid) { |
433 | wpa_hexdump(MSG_DEBUG, "RSN: PMKID from " | |
434 | "Authenticator", ie.pmkid, PMKID_LEN); | |
435 | } | |
436 | } | |
6fc6879b | 437 | |
b4a1256d JM |
438 | res = wpa_supplicant_get_pmk(sm, src_addr, ie.pmkid); |
439 | if (res == -2) { | |
f049052b BG |
440 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: Do not reply to " |
441 | "msg 1/4 - requesting full EAP authentication"); | |
b4a1256d JM |
442 | return; |
443 | } | |
444 | if (res) | |
83935317 | 445 | goto failed; |
6fc6879b JM |
446 | |
447 | if (sm->renew_snonce) { | |
3642c431 | 448 | if (random_get_bytes(sm->snonce, WPA_NONCE_LEN)) { |
0f057fb2 | 449 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
6fc6879b | 450 | "WPA: Failed to get random data for SNonce"); |
83935317 | 451 | goto failed; |
6fc6879b JM |
452 | } |
453 | sm->renew_snonce = 0; | |
454 | wpa_hexdump(MSG_DEBUG, "WPA: Renewed SNonce", | |
455 | sm->snonce, WPA_NONCE_LEN); | |
456 | } | |
457 | ||
458 | /* Calculate PTK which will be stored as a temporary PTK until it has | |
459 | * been verified when processing message 3/4. */ | |
460 | ptk = &sm->tptk; | |
461 | wpa_derive_ptk(sm, src_addr, key, ptk); | |
3b9c5176 | 462 | if (sm->pairwise_cipher == WPA_CIPHER_TKIP) { |
d2c33b91 | 463 | u8 buf[8]; |
3b9c5176 JM |
464 | /* Supplicant: swap tx/rx Mic keys */ |
465 | os_memcpy(buf, ptk->u.auth.tx_mic_key, 8); | |
466 | os_memcpy(ptk->u.auth.tx_mic_key, ptk->u.auth.rx_mic_key, 8); | |
467 | os_memcpy(ptk->u.auth.rx_mic_key, buf, 8); | |
d2c33b91 | 468 | os_memset(buf, 0, sizeof(buf)); |
3b9c5176 | 469 | } |
6fc6879b JM |
470 | sm->tptk_set = 1; |
471 | ||
25ef8529 JM |
472 | kde = sm->assoc_wpa_ie; |
473 | kde_len = sm->assoc_wpa_ie_len; | |
474 | ||
475 | #ifdef CONFIG_P2P | |
476 | if (sm->p2p) { | |
477 | kde_buf = os_malloc(kde_len + 2 + RSN_SELECTOR_LEN + 1); | |
478 | if (kde_buf) { | |
479 | u8 *pos; | |
480 | wpa_printf(MSG_DEBUG, "P2P: Add IP Address Request KDE " | |
481 | "into EAPOL-Key 2/4"); | |
482 | os_memcpy(kde_buf, kde, kde_len); | |
483 | kde = kde_buf; | |
484 | pos = kde + kde_len; | |
485 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
486 | *pos++ = RSN_SELECTOR_LEN + 1; | |
487 | RSN_SELECTOR_PUT(pos, WFA_KEY_DATA_IP_ADDR_REQ); | |
488 | pos += RSN_SELECTOR_LEN; | |
489 | *pos++ = 0x01; | |
490 | kde_len = pos - kde; | |
491 | } | |
492 | } | |
493 | #endif /* CONFIG_P2P */ | |
494 | ||
6fc6879b | 495 | if (wpa_supplicant_send_2_of_4(sm, sm->bssid, key, ver, sm->snonce, |
25ef8529 | 496 | kde, kde_len, ptk)) |
83935317 | 497 | goto failed; |
6fc6879b | 498 | |
25ef8529 | 499 | os_free(kde_buf); |
6fc6879b | 500 | os_memcpy(sm->anonce, key->key_nonce, WPA_NONCE_LEN); |
83935317 JM |
501 | return; |
502 | ||
503 | failed: | |
25ef8529 | 504 | os_free(kde_buf); |
83935317 | 505 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); |
6fc6879b JM |
506 | } |
507 | ||
508 | ||
509 | static void wpa_sm_start_preauth(void *eloop_ctx, void *timeout_ctx) | |
510 | { | |
511 | struct wpa_sm *sm = eloop_ctx; | |
512 | rsn_preauth_candidate_process(sm); | |
513 | } | |
514 | ||
515 | ||
516 | static void wpa_supplicant_key_neg_complete(struct wpa_sm *sm, | |
517 | const u8 *addr, int secure) | |
518 | { | |
0f057fb2 JM |
519 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
520 | "WPA: Key negotiation completed with " | |
6fc6879b JM |
521 | MACSTR " [PTK=%s GTK=%s]", MAC2STR(addr), |
522 | wpa_cipher_txt(sm->pairwise_cipher), | |
523 | wpa_cipher_txt(sm->group_cipher)); | |
6fc6879b JM |
524 | wpa_sm_cancel_auth_timeout(sm); |
525 | wpa_sm_set_state(sm, WPA_COMPLETED); | |
526 | ||
527 | if (secure) { | |
528 | wpa_sm_mlme_setprotection( | |
529 | sm, addr, MLME_SETPROTECTION_PROTECT_TYPE_RX_TX, | |
530 | MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); | |
531 | eapol_sm_notify_portValid(sm->eapol, TRUE); | |
56586197 | 532 | if (wpa_key_mgmt_wpa_psk(sm->key_mgmt)) |
6fc6879b JM |
533 | eapol_sm_notify_eap_success(sm->eapol, TRUE); |
534 | /* | |
535 | * Start preauthentication after a short wait to avoid a | |
536 | * possible race condition between the data receive and key | |
537 | * configuration after the 4-Way Handshake. This increases the | |
ffbf1eaa | 538 | * likelihood of the first preauth EAPOL-Start frame getting to |
6fc6879b JM |
539 | * the target AP. |
540 | */ | |
541 | eloop_register_timeout(1, 0, wpa_sm_start_preauth, sm, NULL); | |
542 | } | |
543 | ||
544 | if (sm->cur_pmksa && sm->cur_pmksa->opportunistic) { | |
f049052b BG |
545 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
546 | "RSN: Authenticator accepted " | |
547 | "opportunistic PMKSA entry - marking it valid"); | |
6fc6879b JM |
548 | sm->cur_pmksa->opportunistic = 0; |
549 | } | |
550 | ||
551 | #ifdef CONFIG_IEEE80211R | |
56586197 | 552 | if (wpa_key_mgmt_ft(sm->key_mgmt)) { |
6fc6879b | 553 | /* Prepare for the next transition */ |
76b7981d | 554 | wpa_ft_prepare_auth_request(sm, NULL); |
6fc6879b JM |
555 | } |
556 | #endif /* CONFIG_IEEE80211R */ | |
557 | } | |
558 | ||
559 | ||
581a8cde JM |
560 | static void wpa_sm_rekey_ptk(void *eloop_ctx, void *timeout_ctx) |
561 | { | |
562 | struct wpa_sm *sm = eloop_ctx; | |
f049052b | 563 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Request PTK rekeying"); |
581a8cde JM |
564 | wpa_sm_key_request(sm, 0, 1); |
565 | } | |
566 | ||
567 | ||
6fc6879b JM |
568 | static int wpa_supplicant_install_ptk(struct wpa_sm *sm, |
569 | const struct wpa_eapol_key *key) | |
570 | { | |
571 | int keylen, rsclen; | |
71934751 | 572 | enum wpa_alg alg; |
6fc6879b JM |
573 | const u8 *key_rsc; |
574 | u8 null_rsc[8] = { 0, 0, 0, 0, 0, 0, 0, 0 }; | |
575 | ||
f049052b BG |
576 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
577 | "WPA: Installing PTK to the driver"); | |
6fc6879b | 578 | |
c3550295 | 579 | if (sm->pairwise_cipher == WPA_CIPHER_NONE) { |
f049052b BG |
580 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Pairwise Cipher " |
581 | "Suite: NONE - do not use pairwise keys"); | |
6fc6879b | 582 | return 0; |
c3550295 JM |
583 | } |
584 | ||
585 | if (!wpa_cipher_valid_pairwise(sm->pairwise_cipher)) { | |
f049052b BG |
586 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
587 | "WPA: Unsupported pairwise cipher %d", | |
588 | sm->pairwise_cipher); | |
6fc6879b JM |
589 | return -1; |
590 | } | |
591 | ||
c3550295 JM |
592 | alg = wpa_cipher_to_alg(sm->pairwise_cipher); |
593 | keylen = wpa_cipher_key_len(sm->pairwise_cipher); | |
594 | rsclen = wpa_cipher_rsc_len(sm->pairwise_cipher); | |
595 | ||
a14896e8 | 596 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { |
6fc6879b JM |
597 | key_rsc = null_rsc; |
598 | } else { | |
599 | key_rsc = key->key_rsc; | |
600 | wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, rsclen); | |
601 | } | |
602 | ||
603 | if (wpa_sm_set_key(sm, alg, sm->bssid, 0, 1, key_rsc, rsclen, | |
604 | (u8 *) sm->ptk.tk1, keylen) < 0) { | |
f049052b BG |
605 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
606 | "WPA: Failed to set PTK to the " | |
607 | "driver (alg=%d keylen=%d bssid=" MACSTR ")", | |
608 | alg, keylen, MAC2STR(sm->bssid)); | |
6fc6879b JM |
609 | return -1; |
610 | } | |
581a8cde JM |
611 | |
612 | if (sm->wpa_ptk_rekey) { | |
613 | eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); | |
614 | eloop_register_timeout(sm->wpa_ptk_rekey, 0, wpa_sm_rekey_ptk, | |
615 | sm, NULL); | |
616 | } | |
617 | ||
6fc6879b JM |
618 | return 0; |
619 | } | |
620 | ||
621 | ||
f049052b BG |
622 | static int wpa_supplicant_check_group_cipher(struct wpa_sm *sm, |
623 | int group_cipher, | |
6fc6879b | 624 | int keylen, int maxkeylen, |
71934751 JM |
625 | int *key_rsc_len, |
626 | enum wpa_alg *alg) | |
6fc6879b | 627 | { |
c3550295 | 628 | int klen; |
6fc6879b | 629 | |
c3550295 JM |
630 | *alg = wpa_cipher_to_alg(group_cipher); |
631 | if (*alg == WPA_ALG_NONE) { | |
f049052b BG |
632 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
633 | "WPA: Unsupported Group Cipher %d", | |
634 | group_cipher); | |
6fc6879b JM |
635 | return -1; |
636 | } | |
c3550295 | 637 | *key_rsc_len = wpa_cipher_rsc_len(group_cipher); |
6fc6879b | 638 | |
c3550295 JM |
639 | klen = wpa_cipher_key_len(group_cipher); |
640 | if (keylen != klen || maxkeylen < klen) { | |
f049052b BG |
641 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
642 | "WPA: Unsupported %s Group Cipher key length %d (%d)", | |
643 | wpa_cipher_txt(group_cipher), keylen, maxkeylen); | |
c3550295 | 644 | return -1; |
6fc6879b | 645 | } |
c3550295 | 646 | return 0; |
6fc6879b JM |
647 | } |
648 | ||
649 | ||
650 | struct wpa_gtk_data { | |
71934751 | 651 | enum wpa_alg alg; |
6fc6879b JM |
652 | int tx, key_rsc_len, keyidx; |
653 | u8 gtk[32]; | |
654 | int gtk_len; | |
655 | }; | |
656 | ||
657 | ||
658 | static int wpa_supplicant_install_gtk(struct wpa_sm *sm, | |
659 | const struct wpa_gtk_data *gd, | |
660 | const u8 *key_rsc) | |
661 | { | |
662 | const u8 *_gtk = gd->gtk; | |
663 | u8 gtk_buf[32]; | |
664 | ||
665 | wpa_hexdump_key(MSG_DEBUG, "WPA: Group Key", gd->gtk, gd->gtk_len); | |
f049052b BG |
666 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
667 | "WPA: Installing GTK to the driver (keyidx=%d tx=%d len=%d)", | |
668 | gd->keyidx, gd->tx, gd->gtk_len); | |
6fc6879b JM |
669 | wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, gd->key_rsc_len); |
670 | if (sm->group_cipher == WPA_CIPHER_TKIP) { | |
671 | /* Swap Tx/Rx keys for Michael MIC */ | |
672 | os_memcpy(gtk_buf, gd->gtk, 16); | |
673 | os_memcpy(gtk_buf + 16, gd->gtk + 24, 8); | |
674 | os_memcpy(gtk_buf + 24, gd->gtk + 16, 8); | |
675 | _gtk = gtk_buf; | |
676 | } | |
677 | if (sm->pairwise_cipher == WPA_CIPHER_NONE) { | |
0382097e | 678 | if (wpa_sm_set_key(sm, gd->alg, NULL, |
6fc6879b JM |
679 | gd->keyidx, 1, key_rsc, gd->key_rsc_len, |
680 | _gtk, gd->gtk_len) < 0) { | |
f049052b BG |
681 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
682 | "WPA: Failed to set GTK to the driver " | |
683 | "(Group only)"); | |
d2c33b91 | 684 | os_memset(gtk_buf, 0, sizeof(gtk_buf)); |
6fc6879b JM |
685 | return -1; |
686 | } | |
0382097e | 687 | } else if (wpa_sm_set_key(sm, gd->alg, broadcast_ether_addr, |
6fc6879b JM |
688 | gd->keyidx, gd->tx, key_rsc, gd->key_rsc_len, |
689 | _gtk, gd->gtk_len) < 0) { | |
f049052b BG |
690 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
691 | "WPA: Failed to set GTK to " | |
692 | "the driver (alg=%d keylen=%d keyidx=%d)", | |
693 | gd->alg, gd->gtk_len, gd->keyidx); | |
d2c33b91 | 694 | os_memset(gtk_buf, 0, sizeof(gtk_buf)); |
6fc6879b JM |
695 | return -1; |
696 | } | |
d2c33b91 | 697 | os_memset(gtk_buf, 0, sizeof(gtk_buf)); |
6fc6879b JM |
698 | |
699 | return 0; | |
700 | } | |
701 | ||
702 | ||
703 | static int wpa_supplicant_gtk_tx_bit_workaround(const struct wpa_sm *sm, | |
704 | int tx) | |
705 | { | |
706 | if (tx && sm->pairwise_cipher != WPA_CIPHER_NONE) { | |
707 | /* Ignore Tx bit for GTK if a pairwise key is used. One AP | |
708 | * seemed to set this bit (incorrectly, since Tx is only when | |
709 | * doing Group Key only APs) and without this workaround, the | |
710 | * data connection does not work because wpa_supplicant | |
711 | * configured non-zero keyidx to be used for unicast. */ | |
f049052b BG |
712 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
713 | "WPA: Tx bit set for GTK, but pairwise " | |
714 | "keys are used - ignore Tx bit"); | |
6fc6879b JM |
715 | return 0; |
716 | } | |
717 | return tx; | |
718 | } | |
719 | ||
720 | ||
721 | static int wpa_supplicant_pairwise_gtk(struct wpa_sm *sm, | |
722 | const struct wpa_eapol_key *key, | |
723 | const u8 *gtk, size_t gtk_len, | |
724 | int key_info) | |
725 | { | |
6fc6879b JM |
726 | struct wpa_gtk_data gd; |
727 | ||
728 | /* | |
729 | * IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames - Figure 43x | |
730 | * GTK KDE format: | |
731 | * KeyID[bits 0-1], Tx [bit 2], Reserved [bits 3-7] | |
732 | * Reserved [bits 0-7] | |
733 | * GTK | |
734 | */ | |
735 | ||
736 | os_memset(&gd, 0, sizeof(gd)); | |
737 | wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in pairwise handshake", | |
738 | gtk, gtk_len); | |
739 | ||
740 | if (gtk_len < 2 || gtk_len - 2 > sizeof(gd.gtk)) | |
741 | return -1; | |
742 | ||
743 | gd.keyidx = gtk[0] & 0x3; | |
744 | gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm, | |
745 | !!(gtk[0] & BIT(2))); | |
746 | gtk += 2; | |
747 | gtk_len -= 2; | |
748 | ||
749 | os_memcpy(gd.gtk, gtk, gtk_len); | |
750 | gd.gtk_len = gtk_len; | |
751 | ||
dff1e285 JM |
752 | if (sm->group_cipher != WPA_CIPHER_GTK_NOT_USED && |
753 | (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, | |
754 | gtk_len, gtk_len, | |
755 | &gd.key_rsc_len, &gd.alg) || | |
756 | wpa_supplicant_install_gtk(sm, &gd, key->key_rsc))) { | |
f049052b BG |
757 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
758 | "RSN: Failed to install GTK"); | |
d2c33b91 | 759 | os_memset(&gd, 0, sizeof(gd)); |
6fc6879b JM |
760 | return -1; |
761 | } | |
d2c33b91 | 762 | os_memset(&gd, 0, sizeof(gd)); |
6fc6879b JM |
763 | |
764 | wpa_supplicant_key_neg_complete(sm, sm->bssid, | |
765 | key_info & WPA_KEY_INFO_SECURE); | |
766 | return 0; | |
6fc6879b JM |
767 | } |
768 | ||
769 | ||
770 | static int ieee80211w_set_keys(struct wpa_sm *sm, | |
771 | struct wpa_eapol_ie_parse *ie) | |
772 | { | |
773 | #ifdef CONFIG_IEEE80211W | |
8dd9f9cd | 774 | if (!wpa_cipher_valid_mgmt_group(sm->mgmt_group_cipher)) |
6fc6879b JM |
775 | return 0; |
776 | ||
777 | if (ie->igtk) { | |
8dd9f9cd | 778 | size_t len; |
6fc6879b JM |
779 | const struct wpa_igtk_kde *igtk; |
780 | u16 keyidx; | |
8dd9f9cd JM |
781 | len = wpa_cipher_key_len(sm->mgmt_group_cipher); |
782 | if (ie->igtk_len != WPA_IGTK_KDE_PREFIX_LEN + len) | |
6fc6879b JM |
783 | return -1; |
784 | igtk = (const struct wpa_igtk_kde *) ie->igtk; | |
785 | keyidx = WPA_GET_LE16(igtk->keyid); | |
f049052b BG |
786 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: IGTK keyid %d " |
787 | "pn %02x%02x%02x%02x%02x%02x", | |
788 | keyidx, MAC2STR(igtk->pn)); | |
6fc6879b | 789 | wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK", |
8dd9f9cd | 790 | igtk->igtk, len); |
6fc6879b | 791 | if (keyidx > 4095) { |
f049052b BG |
792 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
793 | "WPA: Invalid IGTK KeyID %d", keyidx); | |
6fc6879b JM |
794 | return -1; |
795 | } | |
8dd9f9cd JM |
796 | if (wpa_sm_set_key(sm, wpa_cipher_to_alg(sm->mgmt_group_cipher), |
797 | broadcast_ether_addr, | |
6fc6879b | 798 | keyidx, 0, igtk->pn, sizeof(igtk->pn), |
8dd9f9cd | 799 | igtk->igtk, len) < 0) { |
f049052b BG |
800 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
801 | "WPA: Failed to configure IGTK to the driver"); | |
6fc6879b JM |
802 | return -1; |
803 | } | |
804 | } | |
805 | ||
806 | return 0; | |
807 | #else /* CONFIG_IEEE80211W */ | |
808 | return 0; | |
809 | #endif /* CONFIG_IEEE80211W */ | |
810 | } | |
811 | ||
812 | ||
813 | static void wpa_report_ie_mismatch(struct wpa_sm *sm, | |
814 | const char *reason, const u8 *src_addr, | |
815 | const u8 *wpa_ie, size_t wpa_ie_len, | |
816 | const u8 *rsn_ie, size_t rsn_ie_len) | |
817 | { | |
0f057fb2 | 818 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: %s (src=" MACSTR ")", |
6fc6879b JM |
819 | reason, MAC2STR(src_addr)); |
820 | ||
821 | if (sm->ap_wpa_ie) { | |
822 | wpa_hexdump(MSG_INFO, "WPA: WPA IE in Beacon/ProbeResp", | |
823 | sm->ap_wpa_ie, sm->ap_wpa_ie_len); | |
824 | } | |
825 | if (wpa_ie) { | |
826 | if (!sm->ap_wpa_ie) { | |
f049052b BG |
827 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
828 | "WPA: No WPA IE in Beacon/ProbeResp"); | |
6fc6879b JM |
829 | } |
830 | wpa_hexdump(MSG_INFO, "WPA: WPA IE in 3/4 msg", | |
831 | wpa_ie, wpa_ie_len); | |
832 | } | |
833 | ||
834 | if (sm->ap_rsn_ie) { | |
835 | wpa_hexdump(MSG_INFO, "WPA: RSN IE in Beacon/ProbeResp", | |
836 | sm->ap_rsn_ie, sm->ap_rsn_ie_len); | |
837 | } | |
838 | if (rsn_ie) { | |
839 | if (!sm->ap_rsn_ie) { | |
f049052b BG |
840 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
841 | "WPA: No RSN IE in Beacon/ProbeResp"); | |
6fc6879b JM |
842 | } |
843 | wpa_hexdump(MSG_INFO, "WPA: RSN IE in 3/4 msg", | |
844 | rsn_ie, rsn_ie_len); | |
845 | } | |
846 | ||
3da372fa | 847 | wpa_sm_deauthenticate(sm, WLAN_REASON_IE_IN_4WAY_DIFFERS); |
6fc6879b JM |
848 | } |
849 | ||
850 | ||
5af8187e JM |
851 | #ifdef CONFIG_IEEE80211R |
852 | ||
853 | static int ft_validate_mdie(struct wpa_sm *sm, | |
854 | const unsigned char *src_addr, | |
3b4f6dac JM |
855 | struct wpa_eapol_ie_parse *ie, |
856 | const u8 *assoc_resp_mdie) | |
5af8187e JM |
857 | { |
858 | struct rsn_mdie *mdie; | |
859 | ||
5af8187e JM |
860 | mdie = (struct rsn_mdie *) (ie->mdie + 2); |
861 | if (ie->mdie == NULL || ie->mdie_len < 2 + sizeof(*mdie) || | |
862 | os_memcmp(mdie->mobility_domain, sm->mobility_domain, | |
863 | MOBILITY_DOMAIN_ID_LEN) != 0) { | |
f049052b BG |
864 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE in msg 3/4 did " |
865 | "not match with the current mobility domain"); | |
5af8187e JM |
866 | return -1; |
867 | } | |
868 | ||
3b4f6dac JM |
869 | if (assoc_resp_mdie && |
870 | (assoc_resp_mdie[1] != ie->mdie[1] || | |
871 | os_memcmp(assoc_resp_mdie, ie->mdie, 2 + ie->mdie[1]) != 0)) { | |
f049052b | 872 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE mismatch"); |
3b4f6dac JM |
873 | wpa_hexdump(MSG_DEBUG, "FT: MDIE in EAPOL-Key msg 3/4", |
874 | ie->mdie, 2 + ie->mdie[1]); | |
875 | wpa_hexdump(MSG_DEBUG, "FT: MDIE in (Re)Association Response", | |
876 | assoc_resp_mdie, 2 + assoc_resp_mdie[1]); | |
877 | return -1; | |
878 | } | |
879 | ||
880 | return 0; | |
881 | } | |
882 | ||
883 | ||
884 | static int ft_validate_ftie(struct wpa_sm *sm, | |
885 | const unsigned char *src_addr, | |
886 | struct wpa_eapol_ie_parse *ie, | |
887 | const u8 *assoc_resp_ftie) | |
888 | { | |
889 | if (ie->ftie == NULL) { | |
f049052b BG |
890 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
891 | "FT: No FTIE in EAPOL-Key msg 3/4"); | |
3b4f6dac JM |
892 | return -1; |
893 | } | |
894 | ||
895 | if (assoc_resp_ftie == NULL) | |
896 | return 0; | |
897 | ||
898 | if (assoc_resp_ftie[1] != ie->ftie[1] || | |
899 | os_memcmp(assoc_resp_ftie, ie->ftie, 2 + ie->ftie[1]) != 0) { | |
f049052b | 900 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: FTIE mismatch"); |
3b4f6dac JM |
901 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 3/4", |
902 | ie->ftie, 2 + ie->ftie[1]); | |
903 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)Association Response", | |
904 | assoc_resp_ftie, 2 + assoc_resp_ftie[1]); | |
905 | return -1; | |
906 | } | |
907 | ||
5af8187e JM |
908 | return 0; |
909 | } | |
910 | ||
911 | ||
912 | static int ft_validate_rsnie(struct wpa_sm *sm, | |
913 | const unsigned char *src_addr, | |
914 | struct wpa_eapol_ie_parse *ie) | |
915 | { | |
916 | struct wpa_ie_data rsn; | |
917 | ||
918 | if (!ie->rsn_ie) | |
919 | return 0; | |
920 | ||
921 | /* | |
922 | * Verify that PMKR1Name from EAPOL-Key message 3/4 | |
923 | * matches with the value we derived. | |
924 | */ | |
925 | if (wpa_parse_wpa_ie_rsn(ie->rsn_ie, ie->rsn_ie_len, &rsn) < 0 || | |
926 | rsn.num_pmkid != 1 || rsn.pmkid == NULL) { | |
f049052b BG |
927 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: No PMKR1Name in " |
928 | "FT 4-way handshake message 3/4"); | |
5af8187e JM |
929 | return -1; |
930 | } | |
931 | ||
0d15b69f JM |
932 | if (os_memcmp_const(rsn.pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0) |
933 | { | |
f049052b BG |
934 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
935 | "FT: PMKR1Name mismatch in " | |
936 | "FT 4-way handshake message 3/4"); | |
5af8187e JM |
937 | wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Authenticator", |
938 | rsn.pmkid, WPA_PMK_NAME_LEN); | |
939 | wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name", | |
940 | sm->pmk_r1_name, WPA_PMK_NAME_LEN); | |
941 | return -1; | |
942 | } | |
943 | ||
944 | return 0; | |
945 | } | |
946 | ||
947 | ||
948 | static int wpa_supplicant_validate_ie_ft(struct wpa_sm *sm, | |
949 | const unsigned char *src_addr, | |
950 | struct wpa_eapol_ie_parse *ie) | |
951 | { | |
3b4f6dac JM |
952 | const u8 *pos, *end, *mdie = NULL, *ftie = NULL; |
953 | ||
954 | if (sm->assoc_resp_ies) { | |
955 | pos = sm->assoc_resp_ies; | |
956 | end = pos + sm->assoc_resp_ies_len; | |
957 | while (pos + 2 < end) { | |
958 | if (pos + 2 + pos[1] > end) | |
959 | break; | |
960 | switch (*pos) { | |
961 | case WLAN_EID_MOBILITY_DOMAIN: | |
962 | mdie = pos; | |
963 | break; | |
964 | case WLAN_EID_FAST_BSS_TRANSITION: | |
965 | ftie = pos; | |
966 | break; | |
967 | } | |
968 | pos += 2 + pos[1]; | |
969 | } | |
970 | } | |
971 | ||
972 | if (ft_validate_mdie(sm, src_addr, ie, mdie) < 0 || | |
973 | ft_validate_ftie(sm, src_addr, ie, ftie) < 0 || | |
5af8187e JM |
974 | ft_validate_rsnie(sm, src_addr, ie) < 0) |
975 | return -1; | |
976 | ||
977 | return 0; | |
978 | } | |
979 | ||
980 | #endif /* CONFIG_IEEE80211R */ | |
981 | ||
982 | ||
6fc6879b JM |
983 | static int wpa_supplicant_validate_ie(struct wpa_sm *sm, |
984 | const unsigned char *src_addr, | |
985 | struct wpa_eapol_ie_parse *ie) | |
986 | { | |
987 | if (sm->ap_wpa_ie == NULL && sm->ap_rsn_ie == NULL) { | |
f049052b BG |
988 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
989 | "WPA: No WPA/RSN IE for this AP known. " | |
990 | "Trying to get from scan results"); | |
6fc6879b | 991 | if (wpa_sm_get_beacon_ie(sm) < 0) { |
f049052b BG |
992 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
993 | "WPA: Could not find AP from " | |
994 | "the scan results"); | |
6fc6879b | 995 | } else { |
f049052b BG |
996 | wpa_msg(sm->ctx->msg_ctx, MSG_DEBUG, |
997 | "WPA: Found the current AP from " | |
998 | "updated scan results"); | |
6fc6879b JM |
999 | } |
1000 | } | |
1001 | ||
1002 | if (ie->wpa_ie == NULL && ie->rsn_ie == NULL && | |
1003 | (sm->ap_wpa_ie || sm->ap_rsn_ie)) { | |
1004 | wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " | |
1005 | "with IE in Beacon/ProbeResp (no IE?)", | |
1006 | src_addr, ie->wpa_ie, ie->wpa_ie_len, | |
1007 | ie->rsn_ie, ie->rsn_ie_len); | |
1008 | return -1; | |
1009 | } | |
1010 | ||
1011 | if ((ie->wpa_ie && sm->ap_wpa_ie && | |
1012 | (ie->wpa_ie_len != sm->ap_wpa_ie_len || | |
1013 | os_memcmp(ie->wpa_ie, sm->ap_wpa_ie, ie->wpa_ie_len) != 0)) || | |
1014 | (ie->rsn_ie && sm->ap_rsn_ie && | |
26e23750 JM |
1015 | wpa_compare_rsn_ie(wpa_key_mgmt_ft(sm->key_mgmt), |
1016 | sm->ap_rsn_ie, sm->ap_rsn_ie_len, | |
1017 | ie->rsn_ie, ie->rsn_ie_len))) { | |
6fc6879b JM |
1018 | wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " |
1019 | "with IE in Beacon/ProbeResp", | |
1020 | src_addr, ie->wpa_ie, ie->wpa_ie_len, | |
1021 | ie->rsn_ie, ie->rsn_ie_len); | |
1022 | return -1; | |
1023 | } | |
1024 | ||
1025 | if (sm->proto == WPA_PROTO_WPA && | |
1026 | ie->rsn_ie && sm->ap_rsn_ie == NULL && sm->rsn_enabled) { | |
1027 | wpa_report_ie_mismatch(sm, "Possible downgrade attack " | |
1028 | "detected - RSN was enabled and RSN IE " | |
1029 | "was in msg 3/4, but not in " | |
1030 | "Beacon/ProbeResp", | |
1031 | src_addr, ie->wpa_ie, ie->wpa_ie_len, | |
1032 | ie->rsn_ie, ie->rsn_ie_len); | |
1033 | return -1; | |
1034 | } | |
1035 | ||
1036 | #ifdef CONFIG_IEEE80211R | |
5af8187e JM |
1037 | if (wpa_key_mgmt_ft(sm->key_mgmt) && |
1038 | wpa_supplicant_validate_ie_ft(sm, src_addr, ie) < 0) | |
1039 | return -1; | |
6fc6879b JM |
1040 | #endif /* CONFIG_IEEE80211R */ |
1041 | ||
1042 | return 0; | |
1043 | } | |
1044 | ||
1045 | ||
1046 | /** | |
1047 | * wpa_supplicant_send_4_of_4 - Send message 4 of WPA/RSN 4-Way Handshake | |
1048 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
1049 | * @dst: Destination address for the frame | |
1050 | * @key: Pointer to the EAPOL-Key frame header | |
1051 | * @ver: Version bits from EAPOL-Key Key Info | |
1052 | * @key_info: Key Info | |
6fc6879b JM |
1053 | * @ptk: PTK to use for keyed hash and encryption |
1054 | * Returns: 0 on success, -1 on failure | |
1055 | */ | |
1056 | int wpa_supplicant_send_4_of_4(struct wpa_sm *sm, const unsigned char *dst, | |
1057 | const struct wpa_eapol_key *key, | |
1058 | u16 ver, u16 key_info, | |
6fc6879b JM |
1059 | struct wpa_ptk *ptk) |
1060 | { | |
1061 | size_t rlen; | |
1062 | struct wpa_eapol_key *reply; | |
1063 | u8 *rbuf; | |
1064 | ||
6fc6879b | 1065 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, |
e1a273a6 | 1066 | sizeof(*reply), &rlen, (void *) &reply); |
6fc6879b JM |
1067 | if (rbuf == NULL) |
1068 | return -1; | |
1069 | ||
a14896e8 JM |
1070 | reply->type = (sm->proto == WPA_PROTO_RSN || |
1071 | sm->proto == WPA_PROTO_OSEN) ? | |
6fc6879b JM |
1072 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; |
1073 | key_info &= WPA_KEY_INFO_SECURE; | |
1074 | key_info |= ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_MIC; | |
1075 | WPA_PUT_BE16(reply->key_info, key_info); | |
a14896e8 | 1076 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) |
6fc6879b JM |
1077 | WPA_PUT_BE16(reply->key_length, 0); |
1078 | else | |
1079 | os_memcpy(reply->key_length, key->key_length, 2); | |
1080 | os_memcpy(reply->replay_counter, key->replay_counter, | |
1081 | WPA_REPLAY_COUNTER_LEN); | |
1082 | ||
e1a273a6 | 1083 | WPA_PUT_BE16(reply->key_data_length, 0); |
6fc6879b | 1084 | |
f049052b | 1085 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 4/4"); |
6fc6879b JM |
1086 | wpa_eapol_key_send(sm, ptk->kck, ver, dst, ETH_P_EAPOL, |
1087 | rbuf, rlen, reply->key_mic); | |
1088 | ||
1089 | return 0; | |
1090 | } | |
1091 | ||
1092 | ||
1093 | static void wpa_supplicant_process_3_of_4(struct wpa_sm *sm, | |
1094 | const struct wpa_eapol_key *key, | |
e6270129 JM |
1095 | u16 ver, const u8 *key_data, |
1096 | size_t key_data_len) | |
6fc6879b | 1097 | { |
e6270129 | 1098 | u16 key_info, keylen; |
6fc6879b JM |
1099 | struct wpa_eapol_ie_parse ie; |
1100 | ||
1101 | wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE); | |
f049052b BG |
1102 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 3 of 4-Way " |
1103 | "Handshake from " MACSTR " (ver=%d)", MAC2STR(sm->bssid), ver); | |
6fc6879b JM |
1104 | |
1105 | key_info = WPA_GET_BE16(key->key_info); | |
1106 | ||
e6270129 JM |
1107 | wpa_hexdump(MSG_DEBUG, "WPA: IE KeyData", key_data, key_data_len); |
1108 | if (wpa_supplicant_parse_ies(key_data, key_data_len, &ie) < 0) | |
d627a939 | 1109 | goto failed; |
6fc6879b | 1110 | if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { |
f049052b BG |
1111 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1112 | "WPA: GTK IE in unencrypted key data"); | |
83935317 | 1113 | goto failed; |
6fc6879b JM |
1114 | } |
1115 | #ifdef CONFIG_IEEE80211W | |
1116 | if (ie.igtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { | |
f049052b BG |
1117 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1118 | "WPA: IGTK KDE in unencrypted key data"); | |
83935317 | 1119 | goto failed; |
6fc6879b JM |
1120 | } |
1121 | ||
8dd9f9cd JM |
1122 | if (ie.igtk && |
1123 | wpa_cipher_valid_mgmt_group(sm->mgmt_group_cipher) && | |
1124 | ie.igtk_len != WPA_IGTK_KDE_PREFIX_LEN + | |
1125 | (unsigned int) wpa_cipher_key_len(sm->mgmt_group_cipher)) { | |
f049052b BG |
1126 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1127 | "WPA: Invalid IGTK KDE length %lu", | |
1128 | (unsigned long) ie.igtk_len); | |
83935317 | 1129 | goto failed; |
6fc6879b JM |
1130 | } |
1131 | #endif /* CONFIG_IEEE80211W */ | |
1132 | ||
1133 | if (wpa_supplicant_validate_ie(sm, sm->bssid, &ie) < 0) | |
83935317 | 1134 | goto failed; |
6fc6879b JM |
1135 | |
1136 | if (os_memcmp(sm->anonce, key->key_nonce, WPA_NONCE_LEN) != 0) { | |
f049052b BG |
1137 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1138 | "WPA: ANonce from message 1 of 4-Way Handshake " | |
1139 | "differs from 3 of 4-Way Handshake - drop packet (src=" | |
1140 | MACSTR ")", MAC2STR(sm->bssid)); | |
83935317 | 1141 | goto failed; |
6fc6879b JM |
1142 | } |
1143 | ||
1144 | keylen = WPA_GET_BE16(key->key_length); | |
c3550295 JM |
1145 | if (keylen != wpa_cipher_key_len(sm->pairwise_cipher)) { |
1146 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, | |
1147 | "WPA: Invalid %s key length %d (src=" MACSTR | |
1148 | ")", wpa_cipher_txt(sm->pairwise_cipher), keylen, | |
1149 | MAC2STR(sm->bssid)); | |
1150 | goto failed; | |
6fc6879b JM |
1151 | } |
1152 | ||
25ef8529 JM |
1153 | #ifdef CONFIG_P2P |
1154 | if (ie.ip_addr_alloc) { | |
1155 | os_memcpy(sm->p2p_ip_addr, ie.ip_addr_alloc, 3 * 4); | |
1156 | wpa_hexdump(MSG_DEBUG, "P2P: IP address info", | |
1157 | sm->p2p_ip_addr, sizeof(sm->p2p_ip_addr)); | |
1158 | } | |
1159 | #endif /* CONFIG_P2P */ | |
1160 | ||
6fc6879b | 1161 | if (wpa_supplicant_send_4_of_4(sm, sm->bssid, key, ver, key_info, |
e1a273a6 | 1162 | &sm->ptk)) { |
83935317 JM |
1163 | goto failed; |
1164 | } | |
6fc6879b JM |
1165 | |
1166 | /* SNonce was successfully used in msg 3/4, so mark it to be renewed | |
1167 | * for the next 4-Way Handshake. If msg 3 is received again, the old | |
1168 | * SNonce will still be used to avoid changing PTK. */ | |
1169 | sm->renew_snonce = 1; | |
1170 | ||
1171 | if (key_info & WPA_KEY_INFO_INSTALL) { | |
83935317 JM |
1172 | if (wpa_supplicant_install_ptk(sm, key)) |
1173 | goto failed; | |
6fc6879b JM |
1174 | } |
1175 | ||
1176 | if (key_info & WPA_KEY_INFO_SECURE) { | |
1177 | wpa_sm_mlme_setprotection( | |
1178 | sm, sm->bssid, MLME_SETPROTECTION_PROTECT_TYPE_RX, | |
1179 | MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); | |
1180 | eapol_sm_notify_portValid(sm->eapol, TRUE); | |
1181 | } | |
1182 | wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); | |
1183 | ||
dff1e285 JM |
1184 | if (sm->group_cipher == WPA_CIPHER_GTK_NOT_USED) { |
1185 | wpa_supplicant_key_neg_complete(sm, sm->bssid, | |
1186 | key_info & WPA_KEY_INFO_SECURE); | |
1187 | } else if (ie.gtk && | |
6fc6879b JM |
1188 | wpa_supplicant_pairwise_gtk(sm, key, |
1189 | ie.gtk, ie.gtk_len, key_info) < 0) { | |
f049052b BG |
1190 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1191 | "RSN: Failed to configure GTK"); | |
83935317 | 1192 | goto failed; |
6fc6879b JM |
1193 | } |
1194 | ||
83935317 | 1195 | if (ieee80211w_set_keys(sm, &ie) < 0) { |
f049052b BG |
1196 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1197 | "RSN: Failed to configure IGTK"); | |
83935317 JM |
1198 | goto failed; |
1199 | } | |
1200 | ||
392e68e8 SD |
1201 | if (ie.gtk) |
1202 | wpa_sm_set_rekey_offload(sm); | |
b14a210c | 1203 | |
087a1f4e JM |
1204 | if (sm->proto == WPA_PROTO_RSN && wpa_key_mgmt_suite_b(sm->key_mgmt)) { |
1205 | struct rsn_pmksa_cache_entry *sa; | |
1206 | ||
1207 | sa = pmksa_cache_add(sm->pmksa, sm->pmk, sm->pmk_len, | |
1208 | sm->ptk.kck, sizeof(sm->ptk.kck), | |
1209 | sm->bssid, sm->own_addr, | |
1210 | sm->network_ctx, sm->key_mgmt); | |
1211 | if (!sm->cur_pmksa) | |
1212 | sm->cur_pmksa = sa; | |
1213 | } | |
1214 | ||
83935317 JM |
1215 | return; |
1216 | ||
1217 | failed: | |
1218 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); | |
6fc6879b JM |
1219 | } |
1220 | ||
1221 | ||
1222 | static int wpa_supplicant_process_1_of_2_rsn(struct wpa_sm *sm, | |
1223 | const u8 *keydata, | |
1224 | size_t keydatalen, | |
1225 | u16 key_info, | |
1226 | struct wpa_gtk_data *gd) | |
1227 | { | |
1228 | int maxkeylen; | |
1229 | struct wpa_eapol_ie_parse ie; | |
1230 | ||
1231 | wpa_hexdump(MSG_DEBUG, "RSN: msg 1/2 key data", keydata, keydatalen); | |
d627a939 JM |
1232 | if (wpa_supplicant_parse_ies(keydata, keydatalen, &ie) < 0) |
1233 | return -1; | |
6fc6879b | 1234 | if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { |
f049052b BG |
1235 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1236 | "WPA: GTK IE in unencrypted key data"); | |
6fc6879b JM |
1237 | return -1; |
1238 | } | |
1239 | if (ie.gtk == NULL) { | |
f049052b BG |
1240 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1241 | "WPA: No GTK IE in Group Key msg 1/2"); | |
6fc6879b JM |
1242 | return -1; |
1243 | } | |
1244 | maxkeylen = gd->gtk_len = ie.gtk_len - 2; | |
1245 | ||
f049052b | 1246 | if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, |
6fc6879b JM |
1247 | gd->gtk_len, maxkeylen, |
1248 | &gd->key_rsc_len, &gd->alg)) | |
1249 | return -1; | |
1250 | ||
1251 | wpa_hexdump(MSG_DEBUG, "RSN: received GTK in group key handshake", | |
1252 | ie.gtk, ie.gtk_len); | |
1253 | gd->keyidx = ie.gtk[0] & 0x3; | |
1254 | gd->tx = wpa_supplicant_gtk_tx_bit_workaround(sm, | |
1255 | !!(ie.gtk[0] & BIT(2))); | |
1256 | if (ie.gtk_len - 2 > sizeof(gd->gtk)) { | |
f049052b BG |
1257 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1258 | "RSN: Too long GTK in GTK IE (len=%lu)", | |
1259 | (unsigned long) ie.gtk_len - 2); | |
6fc6879b JM |
1260 | return -1; |
1261 | } | |
1262 | os_memcpy(gd->gtk, ie.gtk + 2, ie.gtk_len - 2); | |
1263 | ||
1264 | if (ieee80211w_set_keys(sm, &ie) < 0) | |
f049052b BG |
1265 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1266 | "RSN: Failed to configure IGTK"); | |
6fc6879b JM |
1267 | |
1268 | return 0; | |
1269 | } | |
1270 | ||
1271 | ||
1272 | static int wpa_supplicant_process_1_of_2_wpa(struct wpa_sm *sm, | |
1273 | const struct wpa_eapol_key *key, | |
e6270129 JM |
1274 | const u8 *key_data, |
1275 | size_t key_data_len, u16 key_info, | |
1276 | u16 ver, struct wpa_gtk_data *gd) | |
6fc6879b JM |
1277 | { |
1278 | size_t maxkeylen; | |
6fc6879b JM |
1279 | |
1280 | gd->gtk_len = WPA_GET_BE16(key->key_length); | |
e6270129 | 1281 | maxkeylen = key_data_len; |
6fc6879b JM |
1282 | if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { |
1283 | if (maxkeylen < 8) { | |
f049052b BG |
1284 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1285 | "WPA: Too short maxkeylen (%lu)", | |
1286 | (unsigned long) maxkeylen); | |
6fc6879b JM |
1287 | return -1; |
1288 | } | |
1289 | maxkeylen -= 8; | |
1290 | } | |
1291 | ||
f049052b | 1292 | if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, |
6fc6879b JM |
1293 | gd->gtk_len, maxkeylen, |
1294 | &gd->key_rsc_len, &gd->alg)) | |
1295 | return -1; | |
1296 | ||
1297 | gd->keyidx = (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> | |
1298 | WPA_KEY_INFO_KEY_INDEX_SHIFT; | |
1299 | if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) { | |
d2c33b91 | 1300 | u8 ek[32]; |
e6270129 | 1301 | if (key_data_len > sizeof(gd->gtk)) { |
f049052b BG |
1302 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1303 | "WPA: RC4 key data too long (%lu)", | |
e6270129 | 1304 | (unsigned long) key_data_len); |
6fc6879b JM |
1305 | return -1; |
1306 | } | |
d2c33b91 JM |
1307 | os_memcpy(ek, key->key_iv, 16); |
1308 | os_memcpy(ek + 16, sm->ptk.kek, 16); | |
e6270129 JM |
1309 | os_memcpy(gd->gtk, key_data, key_data_len); |
1310 | if (rc4_skip(ek, 32, 256, gd->gtk, key_data_len)) { | |
d2c33b91 | 1311 | os_memset(ek, 0, sizeof(ek)); |
f049052b BG |
1312 | wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, |
1313 | "WPA: RC4 failed"); | |
7a215dfc JM |
1314 | return -1; |
1315 | } | |
d2c33b91 | 1316 | os_memset(ek, 0, sizeof(ek)); |
6fc6879b | 1317 | } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { |
e6270129 | 1318 | if (maxkeylen % 8) { |
f049052b BG |
1319 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1320 | "WPA: Unsupported AES-WRAP len %lu", | |
e6270129 | 1321 | (unsigned long) maxkeylen); |
6fc6879b JM |
1322 | return -1; |
1323 | } | |
1324 | if (maxkeylen > sizeof(gd->gtk)) { | |
f049052b BG |
1325 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1326 | "WPA: AES-WRAP key data " | |
1327 | "too long (keydatalen=%lu maxkeylen=%lu)", | |
e6270129 | 1328 | (unsigned long) key_data_len, |
f049052b | 1329 | (unsigned long) maxkeylen); |
6fc6879b JM |
1330 | return -1; |
1331 | } | |
eefec1e4 JM |
1332 | if (aes_unwrap(sm->ptk.kek, 16, maxkeylen / 8, key_data, |
1333 | gd->gtk)) { | |
f049052b BG |
1334 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1335 | "WPA: AES unwrap failed - could not decrypt " | |
1336 | "GTK"); | |
6fc6879b JM |
1337 | return -1; |
1338 | } | |
1339 | } else { | |
f049052b BG |
1340 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1341 | "WPA: Unsupported key_info type %d", ver); | |
6fc6879b JM |
1342 | return -1; |
1343 | } | |
1344 | gd->tx = wpa_supplicant_gtk_tx_bit_workaround( | |
1345 | sm, !!(key_info & WPA_KEY_INFO_TXRX)); | |
1346 | return 0; | |
1347 | } | |
1348 | ||
1349 | ||
1350 | static int wpa_supplicant_send_2_of_2(struct wpa_sm *sm, | |
1351 | const struct wpa_eapol_key *key, | |
1352 | int ver, u16 key_info) | |
1353 | { | |
1354 | size_t rlen; | |
1355 | struct wpa_eapol_key *reply; | |
1356 | u8 *rbuf; | |
1357 | ||
1358 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, | |
1359 | sizeof(*reply), &rlen, (void *) &reply); | |
1360 | if (rbuf == NULL) | |
1361 | return -1; | |
1362 | ||
a14896e8 JM |
1363 | reply->type = (sm->proto == WPA_PROTO_RSN || |
1364 | sm->proto == WPA_PROTO_OSEN) ? | |
6fc6879b JM |
1365 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; |
1366 | key_info &= WPA_KEY_INFO_KEY_INDEX_MASK; | |
1367 | key_info |= ver | WPA_KEY_INFO_MIC | WPA_KEY_INFO_SECURE; | |
1368 | WPA_PUT_BE16(reply->key_info, key_info); | |
a14896e8 | 1369 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) |
6fc6879b JM |
1370 | WPA_PUT_BE16(reply->key_length, 0); |
1371 | else | |
1372 | os_memcpy(reply->key_length, key->key_length, 2); | |
1373 | os_memcpy(reply->replay_counter, key->replay_counter, | |
1374 | WPA_REPLAY_COUNTER_LEN); | |
1375 | ||
1376 | WPA_PUT_BE16(reply->key_data_length, 0); | |
1377 | ||
f049052b | 1378 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/2"); |
6fc6879b JM |
1379 | wpa_eapol_key_send(sm, sm->ptk.kck, ver, sm->bssid, ETH_P_EAPOL, |
1380 | rbuf, rlen, reply->key_mic); | |
1381 | ||
1382 | return 0; | |
1383 | } | |
1384 | ||
1385 | ||
1386 | static void wpa_supplicant_process_1_of_2(struct wpa_sm *sm, | |
1387 | const unsigned char *src_addr, | |
1388 | const struct wpa_eapol_key *key, | |
e6270129 JM |
1389 | const u8 *key_data, |
1390 | size_t key_data_len, u16 ver) | |
6fc6879b | 1391 | { |
e6270129 | 1392 | u16 key_info; |
6fc6879b JM |
1393 | int rekey, ret; |
1394 | struct wpa_gtk_data gd; | |
1395 | ||
1396 | os_memset(&gd, 0, sizeof(gd)); | |
1397 | ||
1398 | rekey = wpa_sm_get_state(sm) == WPA_COMPLETED; | |
f049052b BG |
1399 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of Group Key " |
1400 | "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver); | |
6fc6879b JM |
1401 | |
1402 | key_info = WPA_GET_BE16(key->key_info); | |
6fc6879b | 1403 | |
a14896e8 | 1404 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { |
e6270129 JM |
1405 | ret = wpa_supplicant_process_1_of_2_rsn(sm, key_data, |
1406 | key_data_len, key_info, | |
6fc6879b JM |
1407 | &gd); |
1408 | } else { | |
e6270129 JM |
1409 | ret = wpa_supplicant_process_1_of_2_wpa(sm, key, key_data, |
1410 | key_data_len, | |
1411 | key_info, ver, &gd); | |
6fc6879b JM |
1412 | } |
1413 | ||
1414 | wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); | |
1415 | ||
1416 | if (ret) | |
83935317 | 1417 | goto failed; |
6fc6879b JM |
1418 | |
1419 | if (wpa_supplicant_install_gtk(sm, &gd, key->key_rsc) || | |
1420 | wpa_supplicant_send_2_of_2(sm, key, ver, key_info)) | |
83935317 | 1421 | goto failed; |
6fc6879b JM |
1422 | |
1423 | if (rekey) { | |
0f057fb2 | 1424 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Group rekeying " |
6fc6879b JM |
1425 | "completed with " MACSTR " [GTK=%s]", |
1426 | MAC2STR(sm->bssid), wpa_cipher_txt(sm->group_cipher)); | |
1427 | wpa_sm_cancel_auth_timeout(sm); | |
1428 | wpa_sm_set_state(sm, WPA_COMPLETED); | |
1429 | } else { | |
1430 | wpa_supplicant_key_neg_complete(sm, sm->bssid, | |
1431 | key_info & | |
1432 | WPA_KEY_INFO_SECURE); | |
1433 | } | |
392e68e8 SD |
1434 | |
1435 | wpa_sm_set_rekey_offload(sm); | |
1436 | ||
83935317 JM |
1437 | return; |
1438 | ||
1439 | failed: | |
1440 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); | |
6fc6879b JM |
1441 | } |
1442 | ||
1443 | ||
1444 | static int wpa_supplicant_verify_eapol_key_mic(struct wpa_sm *sm, | |
1445 | struct wpa_eapol_key *key, | |
1446 | u16 ver, | |
1447 | const u8 *buf, size_t len) | |
1448 | { | |
1449 | u8 mic[16]; | |
1450 | int ok = 0; | |
1451 | ||
1452 | os_memcpy(mic, key->key_mic, 16); | |
1453 | if (sm->tptk_set) { | |
1454 | os_memset(key->key_mic, 0, 16); | |
929a2ea5 | 1455 | wpa_eapol_key_mic(sm->tptk.kck, sm->key_mgmt, ver, buf, len, |
6fc6879b | 1456 | key->key_mic); |
0d15b69f | 1457 | if (os_memcmp_const(mic, key->key_mic, 16) != 0) { |
f049052b BG |
1458 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1459 | "WPA: Invalid EAPOL-Key MIC " | |
1460 | "when using TPTK - ignoring TPTK"); | |
6fc6879b JM |
1461 | } else { |
1462 | ok = 1; | |
1463 | sm->tptk_set = 0; | |
1464 | sm->ptk_set = 1; | |
1465 | os_memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk)); | |
d2c33b91 | 1466 | os_memset(&sm->tptk, 0, sizeof(sm->tptk)); |
6fc6879b JM |
1467 | } |
1468 | } | |
1469 | ||
1470 | if (!ok && sm->ptk_set) { | |
1471 | os_memset(key->key_mic, 0, 16); | |
929a2ea5 | 1472 | wpa_eapol_key_mic(sm->ptk.kck, sm->key_mgmt, ver, buf, len, |
6fc6879b | 1473 | key->key_mic); |
0d15b69f | 1474 | if (os_memcmp_const(mic, key->key_mic, 16) != 0) { |
f049052b BG |
1475 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1476 | "WPA: Invalid EAPOL-Key MIC - " | |
1477 | "dropping packet"); | |
6fc6879b JM |
1478 | return -1; |
1479 | } | |
1480 | ok = 1; | |
1481 | } | |
1482 | ||
1483 | if (!ok) { | |
f049052b BG |
1484 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1485 | "WPA: Could not verify EAPOL-Key MIC - " | |
1486 | "dropping packet"); | |
6fc6879b JM |
1487 | return -1; |
1488 | } | |
1489 | ||
1490 | os_memcpy(sm->rx_replay_counter, key->replay_counter, | |
1491 | WPA_REPLAY_COUNTER_LEN); | |
1492 | sm->rx_replay_counter_set = 1; | |
1493 | return 0; | |
1494 | } | |
1495 | ||
1496 | ||
1497 | /* Decrypt RSN EAPOL-Key key data (RC4 or AES-WRAP) */ | |
1498 | static int wpa_supplicant_decrypt_key_data(struct wpa_sm *sm, | |
e6270129 JM |
1499 | struct wpa_eapol_key *key, u16 ver, |
1500 | u8 *key_data, size_t *key_data_len) | |
6fc6879b | 1501 | { |
6fc6879b | 1502 | wpa_hexdump(MSG_DEBUG, "RSN: encrypted key data", |
e6270129 | 1503 | key_data, *key_data_len); |
6fc6879b | 1504 | if (!sm->ptk_set) { |
f049052b BG |
1505 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1506 | "WPA: PTK not available, cannot decrypt EAPOL-Key Key " | |
1507 | "Data"); | |
6fc6879b JM |
1508 | return -1; |
1509 | } | |
1510 | ||
1511 | /* Decrypt key data here so that this operation does not need | |
1512 | * to be implemented separately for each message type. */ | |
1513 | if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) { | |
1514 | u8 ek[32]; | |
1515 | os_memcpy(ek, key->key_iv, 16); | |
1516 | os_memcpy(ek + 16, sm->ptk.kek, 16); | |
e6270129 | 1517 | if (rc4_skip(ek, 32, 256, key_data, *key_data_len)) { |
d2c33b91 | 1518 | os_memset(ek, 0, sizeof(ek)); |
f049052b BG |
1519 | wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, |
1520 | "WPA: RC4 failed"); | |
7a215dfc JM |
1521 | return -1; |
1522 | } | |
d2c33b91 | 1523 | os_memset(ek, 0, sizeof(ek)); |
6fc6879b | 1524 | } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || |
df0f01d9 | 1525 | ver == WPA_KEY_INFO_TYPE_AES_128_CMAC || |
929a2ea5 JM |
1526 | sm->key_mgmt == WPA_KEY_MGMT_OSEN || |
1527 | wpa_key_mgmt_suite_b(sm->key_mgmt)) { | |
6fc6879b | 1528 | u8 *buf; |
e6270129 | 1529 | if (*key_data_len < 8 || *key_data_len % 8) { |
f049052b | 1530 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
e6270129 JM |
1531 | "WPA: Unsupported AES-WRAP len %u", |
1532 | (unsigned int) *key_data_len); | |
6fc6879b JM |
1533 | return -1; |
1534 | } | |
e6270129 JM |
1535 | *key_data_len -= 8; /* AES-WRAP adds 8 bytes */ |
1536 | buf = os_malloc(*key_data_len); | |
6fc6879b | 1537 | if (buf == NULL) { |
f049052b BG |
1538 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1539 | "WPA: No memory for AES-UNWRAP buffer"); | |
6fc6879b JM |
1540 | return -1; |
1541 | } | |
eefec1e4 | 1542 | if (aes_unwrap(sm->ptk.kek, 16, *key_data_len / 8, |
e6270129 | 1543 | key_data, buf)) { |
6fc6879b | 1544 | os_free(buf); |
f049052b BG |
1545 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1546 | "WPA: AES unwrap failed - " | |
1547 | "could not decrypt EAPOL-Key key data"); | |
6fc6879b JM |
1548 | return -1; |
1549 | } | |
e6270129 | 1550 | os_memcpy(key_data, buf, *key_data_len); |
6fc6879b | 1551 | os_free(buf); |
e6270129 | 1552 | WPA_PUT_BE16(key->key_data_length, *key_data_len); |
6fc6879b | 1553 | } else { |
f049052b BG |
1554 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1555 | "WPA: Unsupported key_info type %d", ver); | |
6fc6879b JM |
1556 | return -1; |
1557 | } | |
1558 | wpa_hexdump_key(MSG_DEBUG, "WPA: decrypted EAPOL-Key key data", | |
e6270129 | 1559 | key_data, *key_data_len); |
6fc6879b JM |
1560 | return 0; |
1561 | } | |
1562 | ||
1563 | ||
1564 | /** | |
1565 | * wpa_sm_aborted_cached - Notify WPA that PMKSA caching was aborted | |
1566 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
1567 | */ | |
1568 | void wpa_sm_aborted_cached(struct wpa_sm *sm) | |
1569 | { | |
1570 | if (sm && sm->cur_pmksa) { | |
f049052b BG |
1571 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1572 | "RSN: Cancelling PMKSA caching attempt"); | |
6fc6879b JM |
1573 | sm->cur_pmksa = NULL; |
1574 | } | |
1575 | } | |
1576 | ||
1577 | ||
f049052b BG |
1578 | static void wpa_eapol_key_dump(struct wpa_sm *sm, |
1579 | const struct wpa_eapol_key *key) | |
6fc6879b JM |
1580 | { |
1581 | #ifndef CONFIG_NO_STDOUT_DEBUG | |
1582 | u16 key_info = WPA_GET_BE16(key->key_info); | |
1583 | ||
f049052b BG |
1584 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, " EAPOL-Key type=%d", key->type); |
1585 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
1586 | " key_info 0x%x (ver=%d keyidx=%d rsvd=%d %s%s%s%s%s%s%s%s)", | |
1587 | key_info, key_info & WPA_KEY_INFO_TYPE_MASK, | |
1588 | (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> | |
1589 | WPA_KEY_INFO_KEY_INDEX_SHIFT, | |
1590 | (key_info & (BIT(13) | BIT(14) | BIT(15))) >> 13, | |
1591 | key_info & WPA_KEY_INFO_KEY_TYPE ? "Pairwise" : "Group", | |
1592 | key_info & WPA_KEY_INFO_INSTALL ? " Install" : "", | |
1593 | key_info & WPA_KEY_INFO_ACK ? " Ack" : "", | |
1594 | key_info & WPA_KEY_INFO_MIC ? " MIC" : "", | |
1595 | key_info & WPA_KEY_INFO_SECURE ? " Secure" : "", | |
1596 | key_info & WPA_KEY_INFO_ERROR ? " Error" : "", | |
1597 | key_info & WPA_KEY_INFO_REQUEST ? " Request" : "", | |
1598 | key_info & WPA_KEY_INFO_ENCR_KEY_DATA ? " Encr" : ""); | |
1599 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
1600 | " key_length=%u key_data_length=%u", | |
1601 | WPA_GET_BE16(key->key_length), | |
1602 | WPA_GET_BE16(key->key_data_length)); | |
6fc6879b JM |
1603 | wpa_hexdump(MSG_DEBUG, " replay_counter", |
1604 | key->replay_counter, WPA_REPLAY_COUNTER_LEN); | |
1605 | wpa_hexdump(MSG_DEBUG, " key_nonce", key->key_nonce, WPA_NONCE_LEN); | |
1606 | wpa_hexdump(MSG_DEBUG, " key_iv", key->key_iv, 16); | |
1607 | wpa_hexdump(MSG_DEBUG, " key_rsc", key->key_rsc, 8); | |
1608 | wpa_hexdump(MSG_DEBUG, " key_id (reserved)", key->key_id, 8); | |
1609 | wpa_hexdump(MSG_DEBUG, " key_mic", key->key_mic, 16); | |
1610 | #endif /* CONFIG_NO_STDOUT_DEBUG */ | |
1611 | } | |
1612 | ||
1613 | ||
1614 | /** | |
1615 | * wpa_sm_rx_eapol - Process received WPA EAPOL frames | |
1616 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
1617 | * @src_addr: Source MAC address of the EAPOL packet | |
1618 | * @buf: Pointer to the beginning of the EAPOL data (EAPOL header) | |
1619 | * @len: Length of the EAPOL frame | |
1620 | * Returns: 1 = WPA EAPOL-Key processed, 0 = not a WPA EAPOL-Key, -1 failure | |
1621 | * | |
1622 | * This function is called for each received EAPOL frame. Other than EAPOL-Key | |
1623 | * frames can be skipped if filtering is done elsewhere. wpa_sm_rx_eapol() is | |
1624 | * only processing WPA and WPA2 EAPOL-Key frames. | |
1625 | * | |
1626 | * The received EAPOL-Key packets are validated and valid packets are replied | |
1627 | * to. In addition, key material (PTK, GTK) is configured at the end of a | |
1628 | * successful key handshake. | |
1629 | */ | |
1630 | int wpa_sm_rx_eapol(struct wpa_sm *sm, const u8 *src_addr, | |
1631 | const u8 *buf, size_t len) | |
1632 | { | |
e6270129 | 1633 | size_t plen, data_len, key_data_len; |
d56d7e56 | 1634 | const struct ieee802_1x_hdr *hdr; |
6fc6879b JM |
1635 | struct wpa_eapol_key *key; |
1636 | u16 key_info, ver; | |
d56d7e56 | 1637 | u8 *tmp = NULL; |
6fc6879b JM |
1638 | int ret = -1; |
1639 | struct wpa_peerkey *peerkey = NULL; | |
e6270129 | 1640 | u8 *key_data; |
6fc6879b JM |
1641 | |
1642 | #ifdef CONFIG_IEEE80211R | |
1643 | sm->ft_completed = 0; | |
1644 | #endif /* CONFIG_IEEE80211R */ | |
1645 | ||
1646 | if (len < sizeof(*hdr) + sizeof(*key)) { | |
f049052b BG |
1647 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1648 | "WPA: EAPOL frame too short to be a WPA " | |
1649 | "EAPOL-Key (len %lu, expecting at least %lu)", | |
1650 | (unsigned long) len, | |
1651 | (unsigned long) sizeof(*hdr) + sizeof(*key)); | |
6fc6879b JM |
1652 | return 0; |
1653 | } | |
1654 | ||
d56d7e56 | 1655 | hdr = (const struct ieee802_1x_hdr *) buf; |
6fc6879b JM |
1656 | plen = be_to_host16(hdr->length); |
1657 | data_len = plen + sizeof(*hdr); | |
f049052b BG |
1658 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1659 | "IEEE 802.1X RX: version=%d type=%d length=%lu", | |
1660 | hdr->version, hdr->type, (unsigned long) plen); | |
6fc6879b JM |
1661 | |
1662 | if (hdr->version < EAPOL_VERSION) { | |
1663 | /* TODO: backwards compatibility */ | |
1664 | } | |
1665 | if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) { | |
f049052b BG |
1666 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1667 | "WPA: EAPOL frame (type %u) discarded, " | |
6fc6879b JM |
1668 | "not a Key frame", hdr->type); |
1669 | ret = 0; | |
1670 | goto out; | |
1671 | } | |
d56d7e56 | 1672 | wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL-Key", buf, len); |
6fc6879b | 1673 | if (plen > len - sizeof(*hdr) || plen < sizeof(*key)) { |
f049052b BG |
1674 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1675 | "WPA: EAPOL frame payload size %lu " | |
1676 | "invalid (frame size %lu)", | |
1677 | (unsigned long) plen, (unsigned long) len); | |
6fc6879b JM |
1678 | ret = 0; |
1679 | goto out; | |
1680 | } | |
d56d7e56 JM |
1681 | if (data_len < len) { |
1682 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
1683 | "WPA: ignoring %lu bytes after the IEEE 802.1X data", | |
1684 | (unsigned long) len - data_len); | |
1685 | } | |
1686 | ||
1687 | /* | |
1688 | * Make a copy of the frame since we need to modify the buffer during | |
1689 | * MAC validation and Key Data decryption. | |
1690 | */ | |
1691 | tmp = os_malloc(data_len); | |
1692 | if (tmp == NULL) | |
1693 | goto out; | |
1694 | os_memcpy(tmp, buf, data_len); | |
1695 | key = (struct wpa_eapol_key *) (tmp + sizeof(struct ieee802_1x_hdr)); | |
e6270129 | 1696 | key_data = (u8 *) (key + 1); |
6fc6879b JM |
1697 | |
1698 | if (key->type != EAPOL_KEY_TYPE_WPA && key->type != EAPOL_KEY_TYPE_RSN) | |
1699 | { | |
f049052b BG |
1700 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1701 | "WPA: EAPOL-Key type (%d) unknown, discarded", | |
1702 | key->type); | |
6fc6879b JM |
1703 | ret = 0; |
1704 | goto out; | |
1705 | } | |
f049052b | 1706 | wpa_eapol_key_dump(sm, key); |
6fc6879b | 1707 | |
e6270129 JM |
1708 | key_data_len = WPA_GET_BE16(key->key_data_length); |
1709 | if (key_data_len > plen - sizeof(struct wpa_eapol_key)) { | |
d56d7e56 JM |
1710 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Invalid EAPOL-Key " |
1711 | "frame - key_data overflow (%u > %u)", | |
e6270129 | 1712 | (unsigned int) key_data_len, |
d56d7e56 JM |
1713 | (unsigned int) (plen - sizeof(struct wpa_eapol_key))); |
1714 | goto out; | |
6fc6879b | 1715 | } |
d56d7e56 JM |
1716 | |
1717 | eapol_sm_notify_lower_layer_success(sm->eapol, 0); | |
6fc6879b JM |
1718 | key_info = WPA_GET_BE16(key->key_info); |
1719 | ver = key_info & WPA_KEY_INFO_TYPE_MASK; | |
1720 | if (ver != WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && | |
a20088e5 | 1721 | #if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W) |
6fc6879b | 1722 | ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && |
a20088e5 | 1723 | #endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */ |
df0f01d9 | 1724 | ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES && |
929a2ea5 | 1725 | !wpa_key_mgmt_suite_b(sm->key_mgmt) && |
df0f01d9 | 1726 | sm->key_mgmt != WPA_KEY_MGMT_OSEN) { |
f049052b BG |
1727 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1728 | "WPA: Unsupported EAPOL-Key descriptor version %d", | |
1729 | ver); | |
6fc6879b JM |
1730 | goto out; |
1731 | } | |
1732 | ||
df0f01d9 JM |
1733 | if (sm->key_mgmt == WPA_KEY_MGMT_OSEN && |
1734 | ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) { | |
1735 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, | |
1736 | "OSEN: Unsupported EAPOL-Key descriptor version %d", | |
1737 | ver); | |
1738 | goto out; | |
1739 | } | |
1740 | ||
929a2ea5 JM |
1741 | if (wpa_key_mgmt_suite_b(sm->key_mgmt) && |
1742 | ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) { | |
1743 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, | |
1744 | "RSN: Unsupported EAPOL-Key descriptor version %d (expected AKM defined = 0)", | |
1745 | ver); | |
1746 | goto out; | |
1747 | } | |
1748 | ||
6fc6879b | 1749 | #ifdef CONFIG_IEEE80211R |
56586197 | 1750 | if (wpa_key_mgmt_ft(sm->key_mgmt)) { |
6fc6879b JM |
1751 | /* IEEE 802.11r uses a new key_info type (AES-128-CMAC). */ |
1752 | if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) { | |
f049052b BG |
1753 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1754 | "FT: AP did not use AES-128-CMAC"); | |
6fc6879b JM |
1755 | goto out; |
1756 | } | |
1757 | } else | |
1758 | #endif /* CONFIG_IEEE80211R */ | |
56586197 JM |
1759 | #ifdef CONFIG_IEEE80211W |
1760 | if (wpa_key_mgmt_sha256(sm->key_mgmt)) { | |
df0f01d9 | 1761 | if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && |
929a2ea5 JM |
1762 | sm->key_mgmt != WPA_KEY_MGMT_OSEN && |
1763 | !wpa_key_mgmt_suite_b(sm->key_mgmt)) { | |
f049052b BG |
1764 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1765 | "WPA: AP did not use the " | |
1766 | "negotiated AES-128-CMAC"); | |
56586197 JM |
1767 | goto out; |
1768 | } | |
1769 | } else | |
1770 | #endif /* CONFIG_IEEE80211W */ | |
6fc6879b | 1771 | if (sm->pairwise_cipher == WPA_CIPHER_CCMP && |
929a2ea5 | 1772 | !wpa_key_mgmt_suite_b(sm->key_mgmt) && |
6fc6879b | 1773 | ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { |
f049052b BG |
1774 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1775 | "WPA: CCMP is used, but EAPOL-Key " | |
1776 | "descriptor version (%d) is not 2", ver); | |
6fc6879b JM |
1777 | if (sm->group_cipher != WPA_CIPHER_CCMP && |
1778 | !(key_info & WPA_KEY_INFO_KEY_TYPE)) { | |
1779 | /* Earlier versions of IEEE 802.11i did not explicitly | |
1780 | * require version 2 descriptor for all EAPOL-Key | |
1781 | * packets, so allow group keys to use version 1 if | |
1782 | * CCMP is not used for them. */ | |
f049052b BG |
1783 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1784 | "WPA: Backwards compatibility: allow invalid " | |
1785 | "version for non-CCMP group keys"); | |
9f6a7cdd JM |
1786 | } else if (ver == WPA_KEY_INFO_TYPE_AES_128_CMAC) { |
1787 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, | |
1788 | "WPA: Interoperability workaround: allow incorrect (should have been HMAC-SHA1), but stronger (is AES-128-CMAC), descriptor version to be used"); | |
6fc6879b JM |
1789 | } else |
1790 | goto out; | |
801e1173 | 1791 | } else if (sm->pairwise_cipher == WPA_CIPHER_GCMP && |
929a2ea5 | 1792 | !wpa_key_mgmt_suite_b(sm->key_mgmt) && |
801e1173 | 1793 | ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { |
eb7719ff JM |
1794 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1795 | "WPA: GCMP is used, but EAPOL-Key " | |
1796 | "descriptor version (%d) is not 2", ver); | |
1797 | goto out; | |
1798 | } | |
6fc6879b JM |
1799 | |
1800 | #ifdef CONFIG_PEERKEY | |
1801 | for (peerkey = sm->peerkey; peerkey; peerkey = peerkey->next) { | |
1802 | if (os_memcmp(peerkey->addr, src_addr, ETH_ALEN) == 0) | |
1803 | break; | |
1804 | } | |
1805 | ||
1806 | if (!(key_info & WPA_KEY_INFO_SMK_MESSAGE) && peerkey) { | |
1807 | if (!peerkey->initiator && peerkey->replay_counter_set && | |
1808 | os_memcmp(key->replay_counter, peerkey->replay_counter, | |
1809 | WPA_REPLAY_COUNTER_LEN) <= 0) { | |
f049052b BG |
1810 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1811 | "RSN: EAPOL-Key Replay Counter did not " | |
1812 | "increase (STK) - dropping packet"); | |
6fc6879b JM |
1813 | goto out; |
1814 | } else if (peerkey->initiator) { | |
1815 | u8 _tmp[WPA_REPLAY_COUNTER_LEN]; | |
1816 | os_memcpy(_tmp, key->replay_counter, | |
1817 | WPA_REPLAY_COUNTER_LEN); | |
1818 | inc_byte_array(_tmp, WPA_REPLAY_COUNTER_LEN); | |
1819 | if (os_memcmp(_tmp, peerkey->replay_counter, | |
1820 | WPA_REPLAY_COUNTER_LEN) != 0) { | |
f049052b BG |
1821 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1822 | "RSN: EAPOL-Key Replay " | |
1823 | "Counter did not match (STK) - " | |
1824 | "dropping packet"); | |
6fc6879b JM |
1825 | goto out; |
1826 | } | |
1827 | } | |
1828 | } | |
1829 | ||
1830 | if (peerkey && peerkey->initiator && (key_info & WPA_KEY_INFO_ACK)) { | |
f049052b BG |
1831 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1832 | "RSN: Ack bit in key_info from STK peer"); | |
6fc6879b JM |
1833 | goto out; |
1834 | } | |
1835 | #endif /* CONFIG_PEERKEY */ | |
1836 | ||
1837 | if (!peerkey && sm->rx_replay_counter_set && | |
1838 | os_memcmp(key->replay_counter, sm->rx_replay_counter, | |
1839 | WPA_REPLAY_COUNTER_LEN) <= 0) { | |
f049052b BG |
1840 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1841 | "WPA: EAPOL-Key Replay Counter did not increase - " | |
1842 | "dropping packet"); | |
6fc6879b JM |
1843 | goto out; |
1844 | } | |
1845 | ||
1846 | if (!(key_info & (WPA_KEY_INFO_ACK | WPA_KEY_INFO_SMK_MESSAGE)) | |
1847 | #ifdef CONFIG_PEERKEY | |
1848 | && (peerkey == NULL || !peerkey->initiator) | |
1849 | #endif /* CONFIG_PEERKEY */ | |
1850 | ) { | |
f049052b BG |
1851 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1852 | "WPA: No Ack bit in key_info"); | |
6fc6879b JM |
1853 | goto out; |
1854 | } | |
1855 | ||
1856 | if (key_info & WPA_KEY_INFO_REQUEST) { | |
f049052b BG |
1857 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1858 | "WPA: EAPOL-Key with Request bit - dropped"); | |
6fc6879b JM |
1859 | goto out; |
1860 | } | |
1861 | ||
1862 | if ((key_info & WPA_KEY_INFO_MIC) && !peerkey && | |
1863 | wpa_supplicant_verify_eapol_key_mic(sm, key, ver, tmp, data_len)) | |
1864 | goto out; | |
1865 | ||
1866 | #ifdef CONFIG_PEERKEY | |
1867 | if ((key_info & WPA_KEY_INFO_MIC) && peerkey && | |
1868 | peerkey_verify_eapol_key_mic(sm, peerkey, key, ver, tmp, data_len)) | |
1869 | goto out; | |
1870 | #endif /* CONFIG_PEERKEY */ | |
1871 | ||
a14896e8 | 1872 | if ((sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) && |
6fc6879b | 1873 | (key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { |
e6270129 JM |
1874 | if (wpa_supplicant_decrypt_key_data(sm, key, ver, key_data, |
1875 | &key_data_len)) | |
d56d7e56 | 1876 | goto out; |
6fc6879b JM |
1877 | } |
1878 | ||
1879 | if (key_info & WPA_KEY_INFO_KEY_TYPE) { | |
1880 | if (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) { | |
f049052b BG |
1881 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1882 | "WPA: Ignored EAPOL-Key (Pairwise) with " | |
1883 | "non-zero key index"); | |
6fc6879b JM |
1884 | goto out; |
1885 | } | |
1886 | if (peerkey) { | |
1887 | /* PeerKey 4-Way Handshake */ | |
f107d00c JM |
1888 | peerkey_rx_eapol_4way(sm, peerkey, key, key_info, ver, |
1889 | key_data, key_data_len); | |
6fc6879b JM |
1890 | } else if (key_info & WPA_KEY_INFO_MIC) { |
1891 | /* 3/4 4-Way Handshake */ | |
e6270129 JM |
1892 | wpa_supplicant_process_3_of_4(sm, key, ver, key_data, |
1893 | key_data_len); | |
6fc6879b JM |
1894 | } else { |
1895 | /* 1/4 4-Way Handshake */ | |
1896 | wpa_supplicant_process_1_of_4(sm, src_addr, key, | |
e6270129 JM |
1897 | ver, key_data, |
1898 | key_data_len); | |
6fc6879b JM |
1899 | } |
1900 | } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) { | |
1901 | /* PeerKey SMK Handshake */ | |
e6270129 | 1902 | peerkey_rx_eapol_smk(sm, src_addr, key, key_data_len, key_info, |
6fc6879b JM |
1903 | ver); |
1904 | } else { | |
1905 | if (key_info & WPA_KEY_INFO_MIC) { | |
1906 | /* 1/2 Group Key Handshake */ | |
1907 | wpa_supplicant_process_1_of_2(sm, src_addr, key, | |
e6270129 JM |
1908 | key_data, key_data_len, |
1909 | ver); | |
6fc6879b | 1910 | } else { |
f049052b BG |
1911 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1912 | "WPA: EAPOL-Key (Group) without Mic bit - " | |
1913 | "dropped"); | |
6fc6879b JM |
1914 | } |
1915 | } | |
1916 | ||
1917 | ret = 1; | |
1918 | ||
1919 | out: | |
1920 | os_free(tmp); | |
1921 | return ret; | |
1922 | } | |
1923 | ||
1924 | ||
1925 | #ifdef CONFIG_CTRL_IFACE | |
6fc6879b JM |
1926 | static u32 wpa_key_mgmt_suite(struct wpa_sm *sm) |
1927 | { | |
1928 | switch (sm->key_mgmt) { | |
1929 | case WPA_KEY_MGMT_IEEE8021X: | |
a14896e8 JM |
1930 | return ((sm->proto == WPA_PROTO_RSN || |
1931 | sm->proto == WPA_PROTO_OSEN) ? | |
6fc6879b JM |
1932 | RSN_AUTH_KEY_MGMT_UNSPEC_802_1X : |
1933 | WPA_AUTH_KEY_MGMT_UNSPEC_802_1X); | |
1934 | case WPA_KEY_MGMT_PSK: | |
1935 | return (sm->proto == WPA_PROTO_RSN ? | |
1936 | RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X : | |
1937 | WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X); | |
1938 | #ifdef CONFIG_IEEE80211R | |
1939 | case WPA_KEY_MGMT_FT_IEEE8021X: | |
1940 | return RSN_AUTH_KEY_MGMT_FT_802_1X; | |
1941 | case WPA_KEY_MGMT_FT_PSK: | |
1942 | return RSN_AUTH_KEY_MGMT_FT_PSK; | |
1943 | #endif /* CONFIG_IEEE80211R */ | |
56586197 JM |
1944 | #ifdef CONFIG_IEEE80211W |
1945 | case WPA_KEY_MGMT_IEEE8021X_SHA256: | |
1946 | return RSN_AUTH_KEY_MGMT_802_1X_SHA256; | |
1947 | case WPA_KEY_MGMT_PSK_SHA256: | |
1948 | return RSN_AUTH_KEY_MGMT_PSK_SHA256; | |
1949 | #endif /* CONFIG_IEEE80211W */ | |
369c8d7b JM |
1950 | case WPA_KEY_MGMT_CCKM: |
1951 | return (sm->proto == WPA_PROTO_RSN ? | |
1952 | RSN_AUTH_KEY_MGMT_CCKM: | |
1953 | WPA_AUTH_KEY_MGMT_CCKM); | |
6fc6879b JM |
1954 | case WPA_KEY_MGMT_WPA_NONE: |
1955 | return WPA_AUTH_KEY_MGMT_NONE; | |
666497c8 JM |
1956 | case WPA_KEY_MGMT_IEEE8021X_SUITE_B: |
1957 | return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B; | |
6fc6879b JM |
1958 | default: |
1959 | return 0; | |
1960 | } | |
1961 | } | |
1962 | ||
1963 | ||
6fc6879b JM |
1964 | #define RSN_SUITE "%02x-%02x-%02x-%d" |
1965 | #define RSN_SUITE_ARG(s) \ | |
1966 | ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff | |
1967 | ||
1968 | /** | |
1969 | * wpa_sm_get_mib - Dump text list of MIB entries | |
1970 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
1971 | * @buf: Buffer for the list | |
1972 | * @buflen: Length of the buffer | |
1973 | * Returns: Number of bytes written to buffer | |
1974 | * | |
1975 | * This function is used fetch dot11 MIB variables. | |
1976 | */ | |
1977 | int wpa_sm_get_mib(struct wpa_sm *sm, char *buf, size_t buflen) | |
1978 | { | |
1979 | char pmkid_txt[PMKID_LEN * 2 + 1]; | |
1980 | int rsna, ret; | |
1981 | size_t len; | |
1982 | ||
1983 | if (sm->cur_pmksa) { | |
1984 | wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt), | |
1985 | sm->cur_pmksa->pmkid, PMKID_LEN); | |
1986 | } else | |
1987 | pmkid_txt[0] = '\0'; | |
1988 | ||
56586197 JM |
1989 | if ((wpa_key_mgmt_wpa_psk(sm->key_mgmt) || |
1990 | wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt)) && | |
6fc6879b JM |
1991 | sm->proto == WPA_PROTO_RSN) |
1992 | rsna = 1; | |
1993 | else | |
1994 | rsna = 0; | |
1995 | ||
1996 | ret = os_snprintf(buf, buflen, | |
1997 | "dot11RSNAOptionImplemented=TRUE\n" | |
1998 | "dot11RSNAPreauthenticationImplemented=TRUE\n" | |
1999 | "dot11RSNAEnabled=%s\n" | |
2000 | "dot11RSNAPreauthenticationEnabled=%s\n" | |
2001 | "dot11RSNAConfigVersion=%d\n" | |
2002 | "dot11RSNAConfigPairwiseKeysSupported=5\n" | |
2003 | "dot11RSNAConfigGroupCipherSize=%d\n" | |
2004 | "dot11RSNAConfigPMKLifetime=%d\n" | |
2005 | "dot11RSNAConfigPMKReauthThreshold=%d\n" | |
2006 | "dot11RSNAConfigNumberOfPTKSAReplayCounters=1\n" | |
2007 | "dot11RSNAConfigSATimeout=%d\n", | |
2008 | rsna ? "TRUE" : "FALSE", | |
2009 | rsna ? "TRUE" : "FALSE", | |
2010 | RSN_VERSION, | |
c3550295 | 2011 | wpa_cipher_key_len(sm->group_cipher) * 8, |
6fc6879b JM |
2012 | sm->dot11RSNAConfigPMKLifetime, |
2013 | sm->dot11RSNAConfigPMKReauthThreshold, | |
2014 | sm->dot11RSNAConfigSATimeout); | |
2015 | if (ret < 0 || (size_t) ret >= buflen) | |
2016 | return 0; | |
2017 | len = ret; | |
2018 | ||
2019 | ret = os_snprintf( | |
2020 | buf + len, buflen - len, | |
2021 | "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n" | |
2022 | "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n" | |
2023 | "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n" | |
2024 | "dot11RSNAPMKIDUsed=%s\n" | |
2025 | "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n" | |
2026 | "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n" | |
2027 | "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n" | |
2028 | "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n" | |
2029 | "dot11RSNA4WayHandshakeFailures=%u\n", | |
2030 | RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)), | |
c3550295 JM |
2031 | RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, |
2032 | sm->pairwise_cipher)), | |
2033 | RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, | |
2034 | sm->group_cipher)), | |
6fc6879b JM |
2035 | pmkid_txt, |
2036 | RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)), | |
c3550295 JM |
2037 | RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, |
2038 | sm->pairwise_cipher)), | |
2039 | RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, | |
2040 | sm->group_cipher)), | |
6fc6879b JM |
2041 | sm->dot11RSNA4WayHandshakeFailures); |
2042 | if (ret >= 0 && (size_t) ret < buflen) | |
2043 | len += ret; | |
2044 | ||
2045 | return (int) len; | |
2046 | } | |
2047 | #endif /* CONFIG_CTRL_IFACE */ | |
2048 | ||
2049 | ||
2050 | static void wpa_sm_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry, | |
6aaac006 | 2051 | void *ctx, enum pmksa_free_reason reason) |
6fc6879b JM |
2052 | { |
2053 | struct wpa_sm *sm = ctx; | |
6aaac006 | 2054 | int deauth = 0; |
6fc6879b | 2055 | |
6aaac006 DW |
2056 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: PMKSA cache entry free_cb: " |
2057 | MACSTR " reason=%d", MAC2STR(entry->aa), reason); | |
2058 | ||
2059 | if (sm->cur_pmksa == entry) { | |
2060 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
2061 | "RSN: %s current PMKSA entry", | |
2062 | reason == PMKSA_REPLACE ? "replaced" : "removed"); | |
2063 | pmksa_cache_clear_current(sm); | |
2064 | ||
2065 | /* | |
2066 | * If an entry is simply being replaced, there's no need to | |
2067 | * deauthenticate because it will be immediately re-added. | |
2068 | * This happens when EAP authentication is completed again | |
2069 | * (reauth or failed PMKSA caching attempt). | |
2070 | */ | |
2071 | if (reason != PMKSA_REPLACE) | |
2072 | deauth = 1; | |
2073 | } | |
2074 | ||
2075 | if (reason == PMKSA_EXPIRE && | |
6fc6879b JM |
2076 | (sm->pmk_len == entry->pmk_len && |
2077 | os_memcmp(sm->pmk, entry->pmk, sm->pmk_len) == 0)) { | |
f049052b | 2078 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
6aaac006 DW |
2079 | "RSN: deauthenticating due to expired PMK"); |
2080 | pmksa_cache_clear_current(sm); | |
2081 | deauth = 1; | |
2082 | } | |
6fc6879b | 2083 | |
6aaac006 | 2084 | if (deauth) { |
6fc6879b JM |
2085 | os_memset(sm->pmk, 0, sizeof(sm->pmk)); |
2086 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); | |
6fc6879b JM |
2087 | } |
2088 | } | |
2089 | ||
2090 | ||
2091 | /** | |
2092 | * wpa_sm_init - Initialize WPA state machine | |
2093 | * @ctx: Context pointer for callbacks; this needs to be an allocated buffer | |
2094 | * Returns: Pointer to the allocated WPA state machine data | |
2095 | * | |
2096 | * This function is used to allocate a new WPA state machine and the returned | |
2097 | * value is passed to all WPA state machine calls. | |
2098 | */ | |
2099 | struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx) | |
2100 | { | |
2101 | struct wpa_sm *sm; | |
2102 | ||
2103 | sm = os_zalloc(sizeof(*sm)); | |
2104 | if (sm == NULL) | |
2105 | return NULL; | |
c5b26e33 | 2106 | dl_list_init(&sm->pmksa_candidates); |
6fc6879b JM |
2107 | sm->renew_snonce = 1; |
2108 | sm->ctx = ctx; | |
2109 | ||
2110 | sm->dot11RSNAConfigPMKLifetime = 43200; | |
2111 | sm->dot11RSNAConfigPMKReauthThreshold = 70; | |
2112 | sm->dot11RSNAConfigSATimeout = 60; | |
2113 | ||
2114 | sm->pmksa = pmksa_cache_init(wpa_sm_pmksa_free_cb, sm, sm); | |
2115 | if (sm->pmksa == NULL) { | |
f049052b BG |
2116 | wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, |
2117 | "RSN: PMKSA cache initialization failed"); | |
6fc6879b JM |
2118 | os_free(sm); |
2119 | return NULL; | |
2120 | } | |
2121 | ||
2122 | return sm; | |
2123 | } | |
2124 | ||
2125 | ||
2126 | /** | |
2127 | * wpa_sm_deinit - Deinitialize WPA state machine | |
2128 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2129 | */ | |
2130 | void wpa_sm_deinit(struct wpa_sm *sm) | |
2131 | { | |
2132 | if (sm == NULL) | |
2133 | return; | |
2134 | pmksa_cache_deinit(sm->pmksa); | |
2135 | eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL); | |
581a8cde | 2136 | eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); |
6fc6879b JM |
2137 | os_free(sm->assoc_wpa_ie); |
2138 | os_free(sm->ap_wpa_ie); | |
2139 | os_free(sm->ap_rsn_ie); | |
2140 | os_free(sm->ctx); | |
2141 | peerkey_deinit(sm); | |
55046414 JM |
2142 | #ifdef CONFIG_IEEE80211R |
2143 | os_free(sm->assoc_resp_ies); | |
2144 | #endif /* CONFIG_IEEE80211R */ | |
6fc6879b JM |
2145 | os_free(sm); |
2146 | } | |
2147 | ||
2148 | ||
2149 | /** | |
2150 | * wpa_sm_notify_assoc - Notify WPA state machine about association | |
2151 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2152 | * @bssid: The BSSID of the new association | |
2153 | * | |
2154 | * This function is called to let WPA state machine know that the connection | |
2155 | * was established. | |
2156 | */ | |
2157 | void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid) | |
2158 | { | |
58a98fb0 JM |
2159 | int clear_ptk = 1; |
2160 | ||
6fc6879b JM |
2161 | if (sm == NULL) |
2162 | return; | |
2163 | ||
f049052b BG |
2164 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2165 | "WPA: Association event - clear replay counter"); | |
6fc6879b JM |
2166 | os_memcpy(sm->bssid, bssid, ETH_ALEN); |
2167 | os_memset(sm->rx_replay_counter, 0, WPA_REPLAY_COUNTER_LEN); | |
2168 | sm->rx_replay_counter_set = 0; | |
2169 | sm->renew_snonce = 1; | |
2170 | if (os_memcmp(sm->preauth_bssid, bssid, ETH_ALEN) == 0) | |
2171 | rsn_preauth_deinit(sm); | |
2172 | ||
2173 | #ifdef CONFIG_IEEE80211R | |
58a98fb0 | 2174 | if (wpa_ft_is_completed(sm)) { |
5d5a9f00 JM |
2175 | /* |
2176 | * Clear portValid to kick EAPOL state machine to re-enter | |
2177 | * AUTHENTICATED state to get the EAPOL port Authorized. | |
2178 | */ | |
2179 | eapol_sm_notify_portValid(sm->eapol, FALSE); | |
6fc6879b JM |
2180 | wpa_supplicant_key_neg_complete(sm, sm->bssid, 1); |
2181 | ||
2182 | /* Prepare for the next transition */ | |
76b7981d | 2183 | wpa_ft_prepare_auth_request(sm, NULL); |
58a98fb0 JM |
2184 | |
2185 | clear_ptk = 0; | |
6fc6879b JM |
2186 | } |
2187 | #endif /* CONFIG_IEEE80211R */ | |
58a98fb0 JM |
2188 | |
2189 | if (clear_ptk) { | |
2190 | /* | |
2191 | * IEEE 802.11, 8.4.10: Delete PTK SA on (re)association if | |
2192 | * this is not part of a Fast BSS Transition. | |
2193 | */ | |
f049052b | 2194 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PTK"); |
58a98fb0 | 2195 | sm->ptk_set = 0; |
d2c33b91 | 2196 | os_memset(&sm->ptk, 0, sizeof(sm->ptk)); |
58a98fb0 | 2197 | sm->tptk_set = 0; |
d2c33b91 | 2198 | os_memset(&sm->tptk, 0, sizeof(sm->tptk)); |
58a98fb0 | 2199 | } |
40cf22e6 JM |
2200 | |
2201 | #ifdef CONFIG_TDLS | |
2202 | wpa_tdls_assoc(sm); | |
2203 | #endif /* CONFIG_TDLS */ | |
25ef8529 JM |
2204 | |
2205 | #ifdef CONFIG_P2P | |
2206 | os_memset(sm->p2p_ip_addr, 0, sizeof(sm->p2p_ip_addr)); | |
2207 | #endif /* CONFIG_P2P */ | |
6fc6879b JM |
2208 | } |
2209 | ||
2210 | ||
2211 | /** | |
2212 | * wpa_sm_notify_disassoc - Notify WPA state machine about disassociation | |
2213 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2214 | * | |
2215 | * This function is called to let WPA state machine know that the connection | |
2216 | * was lost. This will abort any existing pre-authentication session. | |
2217 | */ | |
2218 | void wpa_sm_notify_disassoc(struct wpa_sm *sm) | |
2219 | { | |
77327298 | 2220 | peerkey_deinit(sm); |
6fc6879b | 2221 | rsn_preauth_deinit(sm); |
0639970d | 2222 | pmksa_cache_clear_current(sm); |
6fc6879b JM |
2223 | if (wpa_sm_get_state(sm) == WPA_4WAY_HANDSHAKE) |
2224 | sm->dot11RSNA4WayHandshakeFailures++; | |
40cf22e6 JM |
2225 | #ifdef CONFIG_TDLS |
2226 | wpa_tdls_disassoc(sm); | |
2227 | #endif /* CONFIG_TDLS */ | |
6fc6879b JM |
2228 | } |
2229 | ||
2230 | ||
2231 | /** | |
2232 | * wpa_sm_set_pmk - Set PMK | |
2233 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2234 | * @pmk: The new PMK | |
2235 | * @pmk_len: The length of the new PMK in bytes | |
bc26ac50 | 2236 | * @bssid: AA to add into PMKSA cache or %NULL to not cache the PMK |
6fc6879b JM |
2237 | * |
2238 | * Configure the PMK for WPA state machine. | |
2239 | */ | |
bc26ac50 JM |
2240 | void wpa_sm_set_pmk(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len, |
2241 | const u8 *bssid) | |
6fc6879b JM |
2242 | { |
2243 | if (sm == NULL) | |
2244 | return; | |
2245 | ||
2246 | sm->pmk_len = pmk_len; | |
2247 | os_memcpy(sm->pmk, pmk, pmk_len); | |
2248 | ||
2249 | #ifdef CONFIG_IEEE80211R | |
2250 | /* Set XXKey to be PSK for FT key derivation */ | |
2251 | sm->xxkey_len = pmk_len; | |
2252 | os_memcpy(sm->xxkey, pmk, pmk_len); | |
2253 | #endif /* CONFIG_IEEE80211R */ | |
bc26ac50 JM |
2254 | |
2255 | if (bssid) { | |
087a1f4e JM |
2256 | pmksa_cache_add(sm->pmksa, pmk, pmk_len, NULL, 0, |
2257 | bssid, sm->own_addr, | |
bc26ac50 JM |
2258 | sm->network_ctx, sm->key_mgmt); |
2259 | } | |
6fc6879b JM |
2260 | } |
2261 | ||
2262 | ||
2263 | /** | |
2264 | * wpa_sm_set_pmk_from_pmksa - Set PMK based on the current PMKSA | |
2265 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2266 | * | |
2267 | * Take the PMK from the current PMKSA into use. If no PMKSA is active, the PMK | |
2268 | * will be cleared. | |
2269 | */ | |
2270 | void wpa_sm_set_pmk_from_pmksa(struct wpa_sm *sm) | |
2271 | { | |
2272 | if (sm == NULL) | |
2273 | return; | |
2274 | ||
2275 | if (sm->cur_pmksa) { | |
2276 | sm->pmk_len = sm->cur_pmksa->pmk_len; | |
2277 | os_memcpy(sm->pmk, sm->cur_pmksa->pmk, sm->pmk_len); | |
2278 | } else { | |
2279 | sm->pmk_len = PMK_LEN; | |
2280 | os_memset(sm->pmk, 0, PMK_LEN); | |
2281 | } | |
2282 | } | |
2283 | ||
2284 | ||
2285 | /** | |
2286 | * wpa_sm_set_fast_reauth - Set fast reauthentication (EAP) enabled/disabled | |
2287 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2288 | * @fast_reauth: Whether fast reauthentication (EAP) is allowed | |
2289 | */ | |
2290 | void wpa_sm_set_fast_reauth(struct wpa_sm *sm, int fast_reauth) | |
2291 | { | |
2292 | if (sm) | |
2293 | sm->fast_reauth = fast_reauth; | |
2294 | } | |
2295 | ||
2296 | ||
2297 | /** | |
2298 | * wpa_sm_set_scard_ctx - Set context pointer for smartcard callbacks | |
2299 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2300 | * @scard_ctx: Context pointer for smartcard related callback functions | |
2301 | */ | |
2302 | void wpa_sm_set_scard_ctx(struct wpa_sm *sm, void *scard_ctx) | |
2303 | { | |
2304 | if (sm == NULL) | |
2305 | return; | |
2306 | sm->scard_ctx = scard_ctx; | |
2307 | if (sm->preauth_eapol) | |
2308 | eapol_sm_register_scard_ctx(sm->preauth_eapol, scard_ctx); | |
2309 | } | |
2310 | ||
2311 | ||
2312 | /** | |
2313 | * wpa_sm_set_config - Notification of current configration change | |
2314 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2315 | * @config: Pointer to current network configuration | |
2316 | * | |
2317 | * Notify WPA state machine that configuration has changed. config will be | |
2318 | * stored as a backpointer to network configuration. This can be %NULL to clear | |
2319 | * the stored pointed. | |
2320 | */ | |
2321 | void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config) | |
2322 | { | |
2323 | if (!sm) | |
2324 | return; | |
2325 | ||
6fc6879b | 2326 | if (config) { |
886a807f | 2327 | sm->network_ctx = config->network_ctx; |
6fc6879b JM |
2328 | sm->peerkey_enabled = config->peerkey_enabled; |
2329 | sm->allowed_pairwise_cipher = config->allowed_pairwise_cipher; | |
2330 | sm->proactive_key_caching = config->proactive_key_caching; | |
2331 | sm->eap_workaround = config->eap_workaround; | |
2332 | sm->eap_conf_ctx = config->eap_conf_ctx; | |
2333 | if (config->ssid) { | |
2334 | os_memcpy(sm->ssid, config->ssid, config->ssid_len); | |
2335 | sm->ssid_len = config->ssid_len; | |
2336 | } else | |
2337 | sm->ssid_len = 0; | |
581a8cde | 2338 | sm->wpa_ptk_rekey = config->wpa_ptk_rekey; |
25ef8529 | 2339 | sm->p2p = config->p2p; |
6fc6879b | 2340 | } else { |
886a807f | 2341 | sm->network_ctx = NULL; |
6fc6879b JM |
2342 | sm->peerkey_enabled = 0; |
2343 | sm->allowed_pairwise_cipher = 0; | |
2344 | sm->proactive_key_caching = 0; | |
2345 | sm->eap_workaround = 0; | |
2346 | sm->eap_conf_ctx = NULL; | |
2347 | sm->ssid_len = 0; | |
581a8cde | 2348 | sm->wpa_ptk_rekey = 0; |
25ef8529 | 2349 | sm->p2p = 0; |
6fc6879b | 2350 | } |
6fc6879b JM |
2351 | } |
2352 | ||
2353 | ||
2354 | /** | |
2355 | * wpa_sm_set_own_addr - Set own MAC address | |
2356 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2357 | * @addr: Own MAC address | |
2358 | */ | |
2359 | void wpa_sm_set_own_addr(struct wpa_sm *sm, const u8 *addr) | |
2360 | { | |
2361 | if (sm) | |
2362 | os_memcpy(sm->own_addr, addr, ETH_ALEN); | |
2363 | } | |
2364 | ||
2365 | ||
2366 | /** | |
2367 | * wpa_sm_set_ifname - Set network interface name | |
2368 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2369 | * @ifname: Interface name | |
2370 | * @bridge_ifname: Optional bridge interface name (for pre-auth) | |
2371 | */ | |
2372 | void wpa_sm_set_ifname(struct wpa_sm *sm, const char *ifname, | |
2373 | const char *bridge_ifname) | |
2374 | { | |
2375 | if (sm) { | |
2376 | sm->ifname = ifname; | |
2377 | sm->bridge_ifname = bridge_ifname; | |
2378 | } | |
2379 | } | |
2380 | ||
2381 | ||
2382 | /** | |
2383 | * wpa_sm_set_eapol - Set EAPOL state machine pointer | |
2384 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2385 | * @eapol: Pointer to EAPOL state machine allocated with eapol_sm_init() | |
2386 | */ | |
2387 | void wpa_sm_set_eapol(struct wpa_sm *sm, struct eapol_sm *eapol) | |
2388 | { | |
2389 | if (sm) | |
2390 | sm->eapol = eapol; | |
2391 | } | |
2392 | ||
2393 | ||
2394 | /** | |
2395 | * wpa_sm_set_param - Set WPA state machine parameters | |
2396 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2397 | * @param: Parameter field | |
2398 | * @value: Parameter value | |
2399 | * Returns: 0 on success, -1 on failure | |
2400 | */ | |
2401 | int wpa_sm_set_param(struct wpa_sm *sm, enum wpa_sm_conf_params param, | |
2402 | unsigned int value) | |
2403 | { | |
2404 | int ret = 0; | |
2405 | ||
2406 | if (sm == NULL) | |
2407 | return -1; | |
2408 | ||
2409 | switch (param) { | |
2410 | case RSNA_PMK_LIFETIME: | |
2411 | if (value > 0) | |
2412 | sm->dot11RSNAConfigPMKLifetime = value; | |
2413 | else | |
2414 | ret = -1; | |
2415 | break; | |
2416 | case RSNA_PMK_REAUTH_THRESHOLD: | |
2417 | if (value > 0 && value <= 100) | |
2418 | sm->dot11RSNAConfigPMKReauthThreshold = value; | |
2419 | else | |
2420 | ret = -1; | |
2421 | break; | |
2422 | case RSNA_SA_TIMEOUT: | |
2423 | if (value > 0) | |
2424 | sm->dot11RSNAConfigSATimeout = value; | |
2425 | else | |
2426 | ret = -1; | |
2427 | break; | |
2428 | case WPA_PARAM_PROTO: | |
2429 | sm->proto = value; | |
2430 | break; | |
2431 | case WPA_PARAM_PAIRWISE: | |
2432 | sm->pairwise_cipher = value; | |
2433 | break; | |
2434 | case WPA_PARAM_GROUP: | |
2435 | sm->group_cipher = value; | |
2436 | break; | |
2437 | case WPA_PARAM_KEY_MGMT: | |
2438 | sm->key_mgmt = value; | |
2439 | break; | |
2440 | #ifdef CONFIG_IEEE80211W | |
2441 | case WPA_PARAM_MGMT_GROUP: | |
2442 | sm->mgmt_group_cipher = value; | |
2443 | break; | |
2444 | #endif /* CONFIG_IEEE80211W */ | |
2445 | case WPA_PARAM_RSN_ENABLED: | |
2446 | sm->rsn_enabled = value; | |
2447 | break; | |
e820cf95 JM |
2448 | case WPA_PARAM_MFP: |
2449 | sm->mfp = value; | |
2450 | break; | |
6fc6879b JM |
2451 | default: |
2452 | break; | |
2453 | } | |
2454 | ||
2455 | return ret; | |
2456 | } | |
2457 | ||
2458 | ||
6fc6879b JM |
2459 | /** |
2460 | * wpa_sm_get_status - Get WPA state machine | |
2461 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2462 | * @buf: Buffer for status information | |
2463 | * @buflen: Maximum buffer length | |
2464 | * @verbose: Whether to include verbose status information | |
2465 | * Returns: Number of bytes written to buf. | |
2466 | * | |
2467 | * Query WPA state machine for status information. This function fills in | |
2468 | * a text area with current status information. If the buffer (buf) is not | |
2469 | * large enough, status information will be truncated to fit the buffer. | |
2470 | */ | |
2471 | int wpa_sm_get_status(struct wpa_sm *sm, char *buf, size_t buflen, | |
2472 | int verbose) | |
2473 | { | |
2474 | char *pos = buf, *end = buf + buflen; | |
2475 | int ret; | |
2476 | ||
2477 | ret = os_snprintf(pos, end - pos, | |
2478 | "pairwise_cipher=%s\n" | |
2479 | "group_cipher=%s\n" | |
2480 | "key_mgmt=%s\n", | |
2481 | wpa_cipher_txt(sm->pairwise_cipher), | |
2482 | wpa_cipher_txt(sm->group_cipher), | |
2483 | wpa_key_mgmt_txt(sm->key_mgmt, sm->proto)); | |
2484 | if (ret < 0 || ret >= end - pos) | |
2485 | return pos - buf; | |
2486 | pos += ret; | |
13e1d2e2 JM |
2487 | |
2488 | if (sm->mfp != NO_MGMT_FRAME_PROTECTION && sm->ap_rsn_ie) { | |
2489 | struct wpa_ie_data rsn; | |
2490 | if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) | |
2491 | >= 0 && | |
2492 | rsn.capabilities & (WPA_CAPABILITY_MFPR | | |
2493 | WPA_CAPABILITY_MFPC)) { | |
2494 | ret = os_snprintf(pos, end - pos, "pmf=%d\n", | |
2495 | (rsn.capabilities & | |
2496 | WPA_CAPABILITY_MFPR) ? 2 : 1); | |
2497 | if (ret < 0 || ret >= end - pos) | |
2498 | return pos - buf; | |
2499 | pos += ret; | |
2500 | } | |
2501 | } | |
2502 | ||
6fc6879b JM |
2503 | return pos - buf; |
2504 | } | |
2505 | ||
2506 | ||
ae8535b6 JM |
2507 | int wpa_sm_pmf_enabled(struct wpa_sm *sm) |
2508 | { | |
2509 | struct wpa_ie_data rsn; | |
2510 | ||
2511 | if (sm->mfp == NO_MGMT_FRAME_PROTECTION || !sm->ap_rsn_ie) | |
2512 | return 0; | |
2513 | ||
2514 | if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) >= 0 && | |
2515 | rsn.capabilities & (WPA_CAPABILITY_MFPR | WPA_CAPABILITY_MFPC)) | |
2516 | return 1; | |
2517 | ||
2518 | return 0; | |
2519 | } | |
2520 | ||
2521 | ||
6fc6879b JM |
2522 | /** |
2523 | * wpa_sm_set_assoc_wpa_ie_default - Generate own WPA/RSN IE from configuration | |
2524 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2525 | * @wpa_ie: Pointer to buffer for WPA/RSN IE | |
2526 | * @wpa_ie_len: Pointer to the length of the wpa_ie buffer | |
2527 | * Returns: 0 on success, -1 on failure | |
2528 | */ | |
2529 | int wpa_sm_set_assoc_wpa_ie_default(struct wpa_sm *sm, u8 *wpa_ie, | |
2530 | size_t *wpa_ie_len) | |
2531 | { | |
2532 | int res; | |
2533 | ||
2534 | if (sm == NULL) | |
2535 | return -1; | |
2536 | ||
2537 | res = wpa_gen_wpa_ie(sm, wpa_ie, *wpa_ie_len); | |
2538 | if (res < 0) | |
2539 | return -1; | |
2540 | *wpa_ie_len = res; | |
2541 | ||
2542 | wpa_hexdump(MSG_DEBUG, "WPA: Set own WPA IE default", | |
2543 | wpa_ie, *wpa_ie_len); | |
2544 | ||
2545 | if (sm->assoc_wpa_ie == NULL) { | |
2546 | /* | |
2547 | * Make a copy of the WPA/RSN IE so that 4-Way Handshake gets | |
2548 | * the correct version of the IE even if PMKSA caching is | |
2549 | * aborted (which would remove PMKID from IE generation). | |
2550 | */ | |
2551 | sm->assoc_wpa_ie = os_malloc(*wpa_ie_len); | |
2552 | if (sm->assoc_wpa_ie == NULL) | |
2553 | return -1; | |
2554 | ||
2555 | os_memcpy(sm->assoc_wpa_ie, wpa_ie, *wpa_ie_len); | |
2556 | sm->assoc_wpa_ie_len = *wpa_ie_len; | |
2557 | } | |
2558 | ||
2559 | return 0; | |
2560 | } | |
2561 | ||
2562 | ||
2563 | /** | |
2564 | * wpa_sm_set_assoc_wpa_ie - Set own WPA/RSN IE from (Re)AssocReq | |
2565 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2566 | * @ie: Pointer to IE data (starting from id) | |
2567 | * @len: IE length | |
2568 | * Returns: 0 on success, -1 on failure | |
2569 | * | |
2570 | * Inform WPA state machine about the WPA/RSN IE used in (Re)Association | |
2571 | * Request frame. The IE will be used to override the default value generated | |
2572 | * with wpa_sm_set_assoc_wpa_ie_default(). | |
2573 | */ | |
2574 | int wpa_sm_set_assoc_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len) | |
2575 | { | |
2576 | if (sm == NULL) | |
2577 | return -1; | |
2578 | ||
2579 | os_free(sm->assoc_wpa_ie); | |
2580 | if (ie == NULL || len == 0) { | |
f049052b BG |
2581 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2582 | "WPA: clearing own WPA/RSN IE"); | |
6fc6879b JM |
2583 | sm->assoc_wpa_ie = NULL; |
2584 | sm->assoc_wpa_ie_len = 0; | |
2585 | } else { | |
2586 | wpa_hexdump(MSG_DEBUG, "WPA: set own WPA/RSN IE", ie, len); | |
2587 | sm->assoc_wpa_ie = os_malloc(len); | |
2588 | if (sm->assoc_wpa_ie == NULL) | |
2589 | return -1; | |
2590 | ||
2591 | os_memcpy(sm->assoc_wpa_ie, ie, len); | |
2592 | sm->assoc_wpa_ie_len = len; | |
2593 | } | |
2594 | ||
2595 | return 0; | |
2596 | } | |
2597 | ||
2598 | ||
2599 | /** | |
2600 | * wpa_sm_set_ap_wpa_ie - Set AP WPA IE from Beacon/ProbeResp | |
2601 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2602 | * @ie: Pointer to IE data (starting from id) | |
2603 | * @len: IE length | |
2604 | * Returns: 0 on success, -1 on failure | |
2605 | * | |
2606 | * Inform WPA state machine about the WPA IE used in Beacon / Probe Response | |
2607 | * frame. | |
2608 | */ | |
2609 | int wpa_sm_set_ap_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len) | |
2610 | { | |
2611 | if (sm == NULL) | |
2612 | return -1; | |
2613 | ||
2614 | os_free(sm->ap_wpa_ie); | |
2615 | if (ie == NULL || len == 0) { | |
f049052b BG |
2616 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2617 | "WPA: clearing AP WPA IE"); | |
6fc6879b JM |
2618 | sm->ap_wpa_ie = NULL; |
2619 | sm->ap_wpa_ie_len = 0; | |
2620 | } else { | |
2621 | wpa_hexdump(MSG_DEBUG, "WPA: set AP WPA IE", ie, len); | |
2622 | sm->ap_wpa_ie = os_malloc(len); | |
2623 | if (sm->ap_wpa_ie == NULL) | |
2624 | return -1; | |
2625 | ||
2626 | os_memcpy(sm->ap_wpa_ie, ie, len); | |
2627 | sm->ap_wpa_ie_len = len; | |
2628 | } | |
2629 | ||
2630 | return 0; | |
2631 | } | |
2632 | ||
2633 | ||
2634 | /** | |
2635 | * wpa_sm_set_ap_rsn_ie - Set AP RSN IE from Beacon/ProbeResp | |
2636 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2637 | * @ie: Pointer to IE data (starting from id) | |
2638 | * @len: IE length | |
2639 | * Returns: 0 on success, -1 on failure | |
2640 | * | |
2641 | * Inform WPA state machine about the RSN IE used in Beacon / Probe Response | |
2642 | * frame. | |
2643 | */ | |
2644 | int wpa_sm_set_ap_rsn_ie(struct wpa_sm *sm, const u8 *ie, size_t len) | |
2645 | { | |
2646 | if (sm == NULL) | |
2647 | return -1; | |
2648 | ||
2649 | os_free(sm->ap_rsn_ie); | |
2650 | if (ie == NULL || len == 0) { | |
f049052b BG |
2651 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2652 | "WPA: clearing AP RSN IE"); | |
6fc6879b JM |
2653 | sm->ap_rsn_ie = NULL; |
2654 | sm->ap_rsn_ie_len = 0; | |
2655 | } else { | |
2656 | wpa_hexdump(MSG_DEBUG, "WPA: set AP RSN IE", ie, len); | |
2657 | sm->ap_rsn_ie = os_malloc(len); | |
2658 | if (sm->ap_rsn_ie == NULL) | |
2659 | return -1; | |
2660 | ||
2661 | os_memcpy(sm->ap_rsn_ie, ie, len); | |
2662 | sm->ap_rsn_ie_len = len; | |
2663 | } | |
2664 | ||
2665 | return 0; | |
2666 | } | |
2667 | ||
2668 | ||
2669 | /** | |
2670 | * wpa_sm_parse_own_wpa_ie - Parse own WPA/RSN IE | |
2671 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2672 | * @data: Pointer to data area for parsing results | |
2673 | * Returns: 0 on success, -1 if IE is not known, or -2 on parsing failure | |
2674 | * | |
2675 | * Parse the contents of the own WPA or RSN IE from (Re)AssocReq and write the | |
2676 | * parsed data into data. | |
2677 | */ | |
2678 | int wpa_sm_parse_own_wpa_ie(struct wpa_sm *sm, struct wpa_ie_data *data) | |
2679 | { | |
2a522e71 JM |
2680 | if (sm == NULL) |
2681 | return -1; | |
2682 | ||
2683 | if (sm->assoc_wpa_ie == NULL) { | |
f049052b BG |
2684 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2685 | "WPA: No WPA/RSN IE available from association info"); | |
6fc6879b JM |
2686 | return -1; |
2687 | } | |
2688 | if (wpa_parse_wpa_ie(sm->assoc_wpa_ie, sm->assoc_wpa_ie_len, data)) | |
2689 | return -2; | |
2690 | return 0; | |
2691 | } | |
540264a7 JM |
2692 | |
2693 | ||
2694 | int wpa_sm_pmksa_cache_list(struct wpa_sm *sm, char *buf, size_t len) | |
2695 | { | |
540264a7 | 2696 | return pmksa_cache_list(sm->pmksa, buf, len); |
540264a7 | 2697 | } |
32d5295f JM |
2698 | |
2699 | ||
9ff4de6d | 2700 | #ifdef CONFIG_TESTING_OPTIONS |
32d5295f JM |
2701 | void wpa_sm_drop_sa(struct wpa_sm *sm) |
2702 | { | |
f049052b | 2703 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PMK and PTK"); |
32d5295f JM |
2704 | sm->ptk_set = 0; |
2705 | sm->tptk_set = 0; | |
2706 | os_memset(sm->pmk, 0, sizeof(sm->pmk)); | |
2707 | os_memset(&sm->ptk, 0, sizeof(sm->ptk)); | |
2708 | os_memset(&sm->tptk, 0, sizeof(sm->tptk)); | |
2709 | } | |
9ff4de6d | 2710 | #endif /* CONFIG_TESTING_OPTIONS */ |
0d7b4409 JM |
2711 | |
2712 | ||
2713 | int wpa_sm_has_ptk(struct wpa_sm *sm) | |
2714 | { | |
2715 | if (sm == NULL) | |
2716 | return 0; | |
2717 | return sm->ptk_set; | |
2718 | } | |
b14a210c JB |
2719 | |
2720 | ||
2721 | void wpa_sm_update_replay_ctr(struct wpa_sm *sm, const u8 *replay_ctr) | |
2722 | { | |
2723 | os_memcpy(sm->rx_replay_counter, replay_ctr, WPA_REPLAY_COUNTER_LEN); | |
2724 | } | |
d8a790b9 JM |
2725 | |
2726 | ||
2727 | void wpa_sm_pmksa_cache_flush(struct wpa_sm *sm, void *network_ctx) | |
2728 | { | |
4033935d | 2729 | pmksa_cache_flush(sm->pmksa, network_ctx, NULL, 0); |
d8a790b9 | 2730 | } |
75cad1a0 XC |
2731 | |
2732 | ||
ad3872a3 | 2733 | #ifdef CONFIG_WNM |
75cad1a0 XC |
2734 | int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 subelem_id, u8 *buf) |
2735 | { | |
75cad1a0 XC |
2736 | u16 keyinfo; |
2737 | u8 keylen; /* plaintext key len */ | |
75cad1a0 XC |
2738 | u8 *key_rsc; |
2739 | ||
75cad1a0 | 2740 | if (subelem_id == WNM_SLEEP_SUBELEM_GTK) { |
d2c33b91 JM |
2741 | struct wpa_gtk_data gd; |
2742 | ||
2743 | os_memset(&gd, 0, sizeof(gd)); | |
2744 | keylen = wpa_cipher_key_len(sm->group_cipher); | |
2745 | gd.key_rsc_len = wpa_cipher_rsc_len(sm->group_cipher); | |
2746 | gd.alg = wpa_cipher_to_alg(sm->group_cipher); | |
2747 | if (gd.alg == WPA_ALG_NONE) { | |
2748 | wpa_printf(MSG_DEBUG, "Unsupported group cipher suite"); | |
2749 | return -1; | |
2750 | } | |
2751 | ||
75cad1a0 | 2752 | key_rsc = buf + 5; |
68db9ab0 | 2753 | keyinfo = WPA_GET_LE16(buf + 2); |
75cad1a0 XC |
2754 | gd.gtk_len = keylen; |
2755 | if (gd.gtk_len != buf[4]) { | |
2756 | wpa_printf(MSG_DEBUG, "GTK len mismatch len %d vs %d", | |
2757 | gd.gtk_len, buf[4]); | |
2758 | return -1; | |
2759 | } | |
2760 | gd.keyidx = keyinfo & 0x03; /* B0 - B1 */ | |
2761 | gd.tx = wpa_supplicant_gtk_tx_bit_workaround( | |
2762 | sm, !!(keyinfo & WPA_KEY_INFO_TXRX)); | |
2763 | ||
68db9ab0 | 2764 | os_memcpy(gd.gtk, buf + 13, gd.gtk_len); |
75cad1a0 XC |
2765 | |
2766 | wpa_hexdump_key(MSG_DEBUG, "Install GTK (WNM SLEEP)", | |
2767 | gd.gtk, gd.gtk_len); | |
2768 | if (wpa_supplicant_install_gtk(sm, &gd, key_rsc)) { | |
d2c33b91 | 2769 | os_memset(&gd, 0, sizeof(gd)); |
75cad1a0 XC |
2770 | wpa_printf(MSG_DEBUG, "Failed to install the GTK in " |
2771 | "WNM mode"); | |
2772 | return -1; | |
2773 | } | |
d2c33b91 | 2774 | os_memset(&gd, 0, sizeof(gd)); |
75cad1a0 XC |
2775 | #ifdef CONFIG_IEEE80211W |
2776 | } else if (subelem_id == WNM_SLEEP_SUBELEM_IGTK) { | |
d2c33b91 JM |
2777 | struct wpa_igtk_kde igd; |
2778 | u16 keyidx; | |
2779 | ||
2780 | os_memset(&igd, 0, sizeof(igd)); | |
8dd9f9cd | 2781 | keylen = wpa_cipher_key_len(sm->mgmt_group_cipher); |
75cad1a0 XC |
2782 | os_memcpy(igd.keyid, buf + 2, 2); |
2783 | os_memcpy(igd.pn, buf + 4, 6); | |
2784 | ||
2785 | keyidx = WPA_GET_LE16(igd.keyid); | |
8dd9f9cd | 2786 | os_memcpy(igd.igtk, buf + 10, keylen); |
75cad1a0 XC |
2787 | |
2788 | wpa_hexdump_key(MSG_DEBUG, "Install IGTK (WNM SLEEP)", | |
8dd9f9cd JM |
2789 | igd.igtk, keylen); |
2790 | if (wpa_sm_set_key(sm, wpa_cipher_to_alg(sm->mgmt_group_cipher), | |
2791 | broadcast_ether_addr, | |
75cad1a0 | 2792 | keyidx, 0, igd.pn, sizeof(igd.pn), |
8dd9f9cd | 2793 | igd.igtk, keylen) < 0) { |
75cad1a0 XC |
2794 | wpa_printf(MSG_DEBUG, "Failed to install the IGTK in " |
2795 | "WNM mode"); | |
d2c33b91 | 2796 | os_memset(&igd, 0, sizeof(igd)); |
75cad1a0 XC |
2797 | return -1; |
2798 | } | |
d2c33b91 | 2799 | os_memset(&igd, 0, sizeof(igd)); |
75cad1a0 XC |
2800 | #endif /* CONFIG_IEEE80211W */ |
2801 | } else { | |
2802 | wpa_printf(MSG_DEBUG, "Unknown element id"); | |
2803 | return -1; | |
2804 | } | |
2805 | ||
2806 | return 0; | |
2807 | } | |
ad3872a3 | 2808 | #endif /* CONFIG_WNM */ |
db76aa64 JM |
2809 | |
2810 | ||
2811 | #ifdef CONFIG_PEERKEY | |
2812 | int wpa_sm_rx_eapol_peerkey(struct wpa_sm *sm, const u8 *src_addr, | |
2813 | const u8 *buf, size_t len) | |
2814 | { | |
2815 | struct wpa_peerkey *peerkey; | |
2816 | ||
2817 | for (peerkey = sm->peerkey; peerkey; peerkey = peerkey->next) { | |
2818 | if (os_memcmp(peerkey->addr, src_addr, ETH_ALEN) == 0) | |
2819 | break; | |
2820 | } | |
2821 | ||
2822 | if (!peerkey) | |
2823 | return 0; | |
2824 | ||
2825 | wpa_sm_rx_eapol(sm, src_addr, buf, len); | |
2826 | ||
2827 | return 1; | |
2828 | } | |
2829 | #endif /* CONFIG_PEERKEY */ | |
25ef8529 JM |
2830 | |
2831 | ||
2832 | #ifdef CONFIG_P2P | |
2833 | ||
2834 | int wpa_sm_get_p2p_ip_addr(struct wpa_sm *sm, u8 *buf) | |
2835 | { | |
2836 | if (sm == NULL || WPA_GET_BE32(sm->p2p_ip_addr) == 0) | |
2837 | return -1; | |
2838 | os_memcpy(buf, sm->p2p_ip_addr, 3 * 4); | |
2839 | return 0; | |
2840 | } | |
2841 | ||
2842 | #endif /* CONFIG_P2P */ | |
b41f2684 CL |
2843 | |
2844 | ||
2845 | void wpa_sm_set_rx_replay_ctr(struct wpa_sm *sm, const u8 *rx_replay_counter) | |
2846 | { | |
2847 | if (rx_replay_counter == NULL) | |
2848 | return; | |
2849 | ||
2850 | os_memcpy(sm->rx_replay_counter, rx_replay_counter, | |
2851 | WPA_REPLAY_COUNTER_LEN); | |
2852 | sm->rx_replay_counter_set = 1; | |
2853 | wpa_printf(MSG_DEBUG, "Updated key replay counter"); | |
2854 | } | |
2855 | ||
2856 | ||
2857 | void wpa_sm_set_ptk_kck_kek(struct wpa_sm *sm, const u8 *ptk_kck, | |
2858 | const u8 *ptk_kek) | |
2859 | { | |
2860 | if (ptk_kck) { | |
2861 | os_memcpy(sm->ptk.kck, ptk_kck, 16); | |
2862 | wpa_printf(MSG_DEBUG, "Updated PTK KCK"); | |
2863 | } | |
2864 | if (ptk_kek) { | |
2865 | os_memcpy(sm->ptk.kek, ptk_kek, 16); | |
2866 | wpa_printf(MSG_DEBUG, "Updated PTK KEK"); | |
2867 | } | |
2868 | sm->ptk_set = 1; | |
2869 | } |