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Commit | Line | Data |
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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 JM |
58 | if (key_mic && |
59 | wpa_eapol_key_mic(kck, ver, msg, msg_len, key_mic)) { | |
f049052b BG |
60 | wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, |
61 | "WPA: Failed to generate EAPOL-Key " | |
62 | "version %d MIC", ver); | |
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 | ||
56586197 | 92 | if (wpa_key_mgmt_ft(sm->key_mgmt) || wpa_key_mgmt_sha256(sm->key_mgmt)) |
6fc6879b | 93 | ver = WPA_KEY_INFO_TYPE_AES_128_CMAC; |
eb7719ff | 94 | else if (sm->pairwise_cipher != WPA_CIPHER_TKIP) |
6fc6879b JM |
95 | ver = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES; |
96 | else | |
97 | ver = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4; | |
98 | ||
99 | if (wpa_sm_get_bssid(sm, bssid) < 0) { | |
f049052b BG |
100 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
101 | "Failed to read BSSID for EAPOL-Key request"); | |
6fc6879b JM |
102 | return; |
103 | } | |
104 | ||
105 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, | |
106 | sizeof(*reply), &rlen, (void *) &reply); | |
107 | if (rbuf == NULL) | |
108 | return; | |
109 | ||
110 | reply->type = sm->proto == WPA_PROTO_RSN ? | |
111 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; | |
112 | key_info = WPA_KEY_INFO_REQUEST | ver; | |
113 | if (sm->ptk_set) | |
114 | key_info |= WPA_KEY_INFO_MIC; | |
115 | if (error) | |
116 | key_info |= WPA_KEY_INFO_ERROR; | |
117 | if (pairwise) | |
118 | key_info |= WPA_KEY_INFO_KEY_TYPE; | |
119 | WPA_PUT_BE16(reply->key_info, key_info); | |
120 | WPA_PUT_BE16(reply->key_length, 0); | |
121 | os_memcpy(reply->replay_counter, sm->request_counter, | |
122 | WPA_REPLAY_COUNTER_LEN); | |
123 | inc_byte_array(sm->request_counter, WPA_REPLAY_COUNTER_LEN); | |
124 | ||
125 | WPA_PUT_BE16(reply->key_data_length, 0); | |
126 | ||
f049052b BG |
127 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
128 | "WPA: Sending EAPOL-Key Request (error=%d " | |
129 | "pairwise=%d ptk_set=%d len=%lu)", | |
130 | error, pairwise, sm->ptk_set, (unsigned long) rlen); | |
6fc6879b JM |
131 | wpa_eapol_key_send(sm, sm->ptk.kck, ver, bssid, ETH_P_EAPOL, |
132 | rbuf, rlen, key_info & WPA_KEY_INFO_MIC ? | |
133 | reply->key_mic : NULL); | |
134 | } | |
135 | ||
136 | ||
137 | static int wpa_supplicant_get_pmk(struct wpa_sm *sm, | |
138 | const unsigned char *src_addr, | |
139 | const u8 *pmkid) | |
140 | { | |
141 | int abort_cached = 0; | |
142 | ||
143 | if (pmkid && !sm->cur_pmksa) { | |
144 | /* When using drivers that generate RSN IE, wpa_supplicant may | |
145 | * not have enough time to get the association information | |
146 | * event before receiving this 1/4 message, so try to find a | |
147 | * matching PMKSA cache entry here. */ | |
96efeeb6 JM |
148 | sm->cur_pmksa = pmksa_cache_get(sm->pmksa, src_addr, pmkid, |
149 | NULL); | |
6fc6879b | 150 | if (sm->cur_pmksa) { |
f049052b BG |
151 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
152 | "RSN: found matching PMKID from PMKSA cache"); | |
6fc6879b | 153 | } else { |
f049052b BG |
154 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
155 | "RSN: no matching PMKID found"); | |
6fc6879b JM |
156 | abort_cached = 1; |
157 | } | |
158 | } | |
159 | ||
160 | if (pmkid && sm->cur_pmksa && | |
161 | os_memcmp(pmkid, sm->cur_pmksa->pmkid, PMKID_LEN) == 0) { | |
162 | wpa_hexdump(MSG_DEBUG, "RSN: matched PMKID", pmkid, PMKID_LEN); | |
163 | wpa_sm_set_pmk_from_pmksa(sm); | |
164 | wpa_hexdump_key(MSG_DEBUG, "RSN: PMK from PMKSA cache", | |
165 | sm->pmk, sm->pmk_len); | |
166 | eapol_sm_notify_cached(sm->eapol); | |
167 | #ifdef CONFIG_IEEE80211R | |
168 | sm->xxkey_len = 0; | |
169 | #endif /* CONFIG_IEEE80211R */ | |
56586197 | 170 | } else if (wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) && sm->eapol) { |
6fc6879b JM |
171 | int res, pmk_len; |
172 | pmk_len = PMK_LEN; | |
173 | res = eapol_sm_get_key(sm->eapol, sm->pmk, PMK_LEN); | |
174 | if (res) { | |
175 | /* | |
176 | * EAP-LEAP is an exception from other EAP methods: it | |
177 | * uses only 16-byte PMK. | |
178 | */ | |
179 | res = eapol_sm_get_key(sm->eapol, sm->pmk, 16); | |
180 | pmk_len = 16; | |
181 | } else { | |
182 | #ifdef CONFIG_IEEE80211R | |
183 | u8 buf[2 * PMK_LEN]; | |
184 | if (eapol_sm_get_key(sm->eapol, buf, 2 * PMK_LEN) == 0) | |
185 | { | |
186 | os_memcpy(sm->xxkey, buf + PMK_LEN, PMK_LEN); | |
187 | sm->xxkey_len = PMK_LEN; | |
188 | os_memset(buf, 0, sizeof(buf)); | |
189 | } | |
190 | #endif /* CONFIG_IEEE80211R */ | |
191 | } | |
192 | if (res == 0) { | |
a7f10d65 | 193 | struct rsn_pmksa_cache_entry *sa = NULL; |
6fc6879b JM |
194 | wpa_hexdump_key(MSG_DEBUG, "WPA: PMK from EAPOL state " |
195 | "machines", sm->pmk, pmk_len); | |
196 | sm->pmk_len = pmk_len; | |
715ed737 HW |
197 | if (sm->proto == WPA_PROTO_RSN && |
198 | !wpa_key_mgmt_ft(sm->key_mgmt)) { | |
a7f10d65 JM |
199 | sa = pmksa_cache_add(sm->pmksa, |
200 | sm->pmk, pmk_len, | |
201 | src_addr, sm->own_addr, | |
202 | sm->network_ctx, | |
203 | sm->key_mgmt); | |
f5a51b58 | 204 | } |
6fc6879b | 205 | if (!sm->cur_pmksa && pmkid && |
96efeeb6 JM |
206 | pmksa_cache_get(sm->pmksa, src_addr, pmkid, NULL)) |
207 | { | |
f049052b BG |
208 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
209 | "RSN: the new PMK matches with the " | |
210 | "PMKID"); | |
6fc6879b JM |
211 | abort_cached = 0; |
212 | } | |
a7f10d65 JM |
213 | |
214 | if (!sm->cur_pmksa) | |
215 | sm->cur_pmksa = sa; | |
6fc6879b | 216 | } else { |
0f057fb2 | 217 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
6fc6879b | 218 | "WPA: Failed to get master session key from " |
f049052b BG |
219 | "EAPOL state machines - key handshake " |
220 | "aborted"); | |
6fc6879b | 221 | if (sm->cur_pmksa) { |
f049052b BG |
222 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
223 | "RSN: Cancelled PMKSA caching " | |
224 | "attempt"); | |
6fc6879b JM |
225 | sm->cur_pmksa = NULL; |
226 | abort_cached = 1; | |
1ac2d4a9 | 227 | } else if (!abort_cached) { |
6fc6879b JM |
228 | return -1; |
229 | } | |
230 | } | |
231 | } | |
232 | ||
715ed737 HW |
233 | if (abort_cached && wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) && |
234 | !wpa_key_mgmt_ft(sm->key_mgmt)) { | |
6fc6879b JM |
235 | /* Send EAPOL-Start to trigger full EAP authentication. */ |
236 | u8 *buf; | |
237 | size_t buflen; | |
238 | ||
f049052b BG |
239 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
240 | "RSN: no PMKSA entry found - trigger " | |
241 | "full EAP authentication"); | |
6fc6879b JM |
242 | buf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_START, |
243 | NULL, 0, &buflen, NULL); | |
244 | if (buf) { | |
245 | wpa_sm_ether_send(sm, sm->bssid, ETH_P_EAPOL, | |
246 | buf, buflen); | |
247 | os_free(buf); | |
b4a1256d | 248 | return -2; |
6fc6879b JM |
249 | } |
250 | ||
251 | return -1; | |
252 | } | |
253 | ||
254 | return 0; | |
255 | } | |
256 | ||
257 | ||
258 | /** | |
259 | * wpa_supplicant_send_2_of_4 - Send message 2 of WPA/RSN 4-Way Handshake | |
260 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
261 | * @dst: Destination address for the frame | |
262 | * @key: Pointer to the EAPOL-Key frame header | |
263 | * @ver: Version bits from EAPOL-Key Key Info | |
264 | * @nonce: Nonce value for the EAPOL-Key frame | |
265 | * @wpa_ie: WPA/RSN IE | |
266 | * @wpa_ie_len: Length of the WPA/RSN IE | |
267 | * @ptk: PTK to use for keyed hash and encryption | |
268 | * Returns: 0 on success, -1 on failure | |
269 | */ | |
270 | int wpa_supplicant_send_2_of_4(struct wpa_sm *sm, const unsigned char *dst, | |
271 | const struct wpa_eapol_key *key, | |
272 | int ver, const u8 *nonce, | |
273 | const u8 *wpa_ie, size_t wpa_ie_len, | |
274 | struct wpa_ptk *ptk) | |
275 | { | |
276 | size_t rlen; | |
277 | struct wpa_eapol_key *reply; | |
278 | u8 *rbuf; | |
26e23750 | 279 | u8 *rsn_ie_buf = NULL; |
6fc6879b JM |
280 | |
281 | if (wpa_ie == NULL) { | |
f049052b BG |
282 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No wpa_ie set - " |
283 | "cannot generate msg 2/4"); | |
6fc6879b JM |
284 | return -1; |
285 | } | |
286 | ||
26e23750 JM |
287 | #ifdef CONFIG_IEEE80211R |
288 | if (wpa_key_mgmt_ft(sm->key_mgmt)) { | |
289 | int res; | |
290 | ||
55046414 JM |
291 | /* |
292 | * Add PMKR1Name into RSN IE (PMKID-List) and add MDIE and | |
293 | * FTIE from (Re)Association Response. | |
294 | */ | |
295 | rsn_ie_buf = os_malloc(wpa_ie_len + 2 + 2 + PMKID_LEN + | |
296 | sm->assoc_resp_ies_len); | |
26e23750 JM |
297 | if (rsn_ie_buf == NULL) |
298 | return -1; | |
299 | os_memcpy(rsn_ie_buf, wpa_ie, wpa_ie_len); | |
300 | res = wpa_insert_pmkid(rsn_ie_buf, wpa_ie_len, | |
301 | sm->pmk_r1_name); | |
302 | if (res < 0) { | |
303 | os_free(rsn_ie_buf); | |
304 | return -1; | |
305 | } | |
55046414 JM |
306 | wpa_ie_len += res; |
307 | ||
308 | if (sm->assoc_resp_ies) { | |
309 | os_memcpy(rsn_ie_buf + wpa_ie_len, sm->assoc_resp_ies, | |
310 | sm->assoc_resp_ies_len); | |
311 | wpa_ie_len += sm->assoc_resp_ies_len; | |
312 | } | |
26e23750 JM |
313 | |
314 | wpa_ie = rsn_ie_buf; | |
26e23750 JM |
315 | } |
316 | #endif /* CONFIG_IEEE80211R */ | |
317 | ||
6fc6879b JM |
318 | wpa_hexdump(MSG_DEBUG, "WPA: WPA IE for msg 2/4", wpa_ie, wpa_ie_len); |
319 | ||
320 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, | |
321 | NULL, sizeof(*reply) + wpa_ie_len, | |
322 | &rlen, (void *) &reply); | |
26e23750 JM |
323 | if (rbuf == NULL) { |
324 | os_free(rsn_ie_buf); | |
6fc6879b | 325 | return -1; |
26e23750 | 326 | } |
6fc6879b JM |
327 | |
328 | reply->type = sm->proto == WPA_PROTO_RSN ? | |
329 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; | |
330 | WPA_PUT_BE16(reply->key_info, | |
331 | ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_MIC); | |
332 | if (sm->proto == WPA_PROTO_RSN) | |
333 | WPA_PUT_BE16(reply->key_length, 0); | |
334 | else | |
335 | os_memcpy(reply->key_length, key->key_length, 2); | |
336 | os_memcpy(reply->replay_counter, key->replay_counter, | |
337 | WPA_REPLAY_COUNTER_LEN); | |
bc8318ac JM |
338 | wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter", reply->replay_counter, |
339 | WPA_REPLAY_COUNTER_LEN); | |
6fc6879b JM |
340 | |
341 | WPA_PUT_BE16(reply->key_data_length, wpa_ie_len); | |
342 | os_memcpy(reply + 1, wpa_ie, wpa_ie_len); | |
26e23750 | 343 | os_free(rsn_ie_buf); |
6fc6879b JM |
344 | |
345 | os_memcpy(reply->key_nonce, nonce, WPA_NONCE_LEN); | |
346 | ||
f049052b | 347 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/4"); |
6fc6879b JM |
348 | wpa_eapol_key_send(sm, ptk->kck, ver, dst, ETH_P_EAPOL, |
349 | rbuf, rlen, reply->key_mic); | |
350 | ||
351 | return 0; | |
352 | } | |
353 | ||
354 | ||
355 | static int wpa_derive_ptk(struct wpa_sm *sm, const unsigned char *src_addr, | |
356 | const struct wpa_eapol_key *key, | |
357 | struct wpa_ptk *ptk) | |
358 | { | |
eb7719ff | 359 | size_t ptk_len = sm->pairwise_cipher != WPA_CIPHER_TKIP ? 48 : 64; |
6fc6879b | 360 | #ifdef CONFIG_IEEE80211R |
56586197 | 361 | if (wpa_key_mgmt_ft(sm->key_mgmt)) |
c0a61908 | 362 | return wpa_derive_ptk_ft(sm, src_addr, key, ptk, ptk_len); |
6fc6879b JM |
363 | #endif /* CONFIG_IEEE80211R */ |
364 | ||
365 | wpa_pmk_to_ptk(sm->pmk, sm->pmk_len, "Pairwise key expansion", | |
366 | sm->own_addr, sm->bssid, sm->snonce, key->key_nonce, | |
c0a61908 | 367 | (u8 *) ptk, ptk_len, |
56586197 | 368 | wpa_key_mgmt_sha256(sm->key_mgmt)); |
6fc6879b JM |
369 | return 0; |
370 | } | |
371 | ||
372 | ||
373 | static void wpa_supplicant_process_1_of_4(struct wpa_sm *sm, | |
374 | const unsigned char *src_addr, | |
375 | const struct wpa_eapol_key *key, | |
376 | u16 ver) | |
377 | { | |
378 | struct wpa_eapol_ie_parse ie; | |
379 | struct wpa_ptk *ptk; | |
380 | u8 buf[8]; | |
b4a1256d | 381 | int res; |
6fc6879b JM |
382 | |
383 | if (wpa_sm_get_network_ctx(sm) == NULL) { | |
f049052b BG |
384 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No SSID info " |
385 | "found (msg 1 of 4)"); | |
6fc6879b JM |
386 | return; |
387 | } | |
388 | ||
389 | wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE); | |
f049052b BG |
390 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of 4-Way " |
391 | "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver); | |
6fc6879b JM |
392 | |
393 | os_memset(&ie, 0, sizeof(ie)); | |
394 | ||
6fc6879b JM |
395 | if (sm->proto == WPA_PROTO_RSN) { |
396 | /* RSN: msg 1/4 should contain PMKID for the selected PMK */ | |
397 | const u8 *_buf = (const u8 *) (key + 1); | |
398 | size_t len = WPA_GET_BE16(key->key_data_length); | |
399 | wpa_hexdump(MSG_DEBUG, "RSN: msg 1/4 key data", _buf, len); | |
d627a939 JM |
400 | if (wpa_supplicant_parse_ies(_buf, len, &ie) < 0) |
401 | goto failed; | |
6fc6879b JM |
402 | if (ie.pmkid) { |
403 | wpa_hexdump(MSG_DEBUG, "RSN: PMKID from " | |
404 | "Authenticator", ie.pmkid, PMKID_LEN); | |
405 | } | |
406 | } | |
6fc6879b | 407 | |
b4a1256d JM |
408 | res = wpa_supplicant_get_pmk(sm, src_addr, ie.pmkid); |
409 | if (res == -2) { | |
f049052b BG |
410 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: Do not reply to " |
411 | "msg 1/4 - requesting full EAP authentication"); | |
b4a1256d JM |
412 | return; |
413 | } | |
414 | if (res) | |
83935317 | 415 | goto failed; |
6fc6879b JM |
416 | |
417 | if (sm->renew_snonce) { | |
3642c431 | 418 | if (random_get_bytes(sm->snonce, WPA_NONCE_LEN)) { |
0f057fb2 | 419 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
6fc6879b | 420 | "WPA: Failed to get random data for SNonce"); |
83935317 | 421 | goto failed; |
6fc6879b JM |
422 | } |
423 | sm->renew_snonce = 0; | |
424 | wpa_hexdump(MSG_DEBUG, "WPA: Renewed SNonce", | |
425 | sm->snonce, WPA_NONCE_LEN); | |
426 | } | |
427 | ||
428 | /* Calculate PTK which will be stored as a temporary PTK until it has | |
429 | * been verified when processing message 3/4. */ | |
430 | ptk = &sm->tptk; | |
431 | wpa_derive_ptk(sm, src_addr, key, ptk); | |
432 | /* Supplicant: swap tx/rx Mic keys */ | |
433 | os_memcpy(buf, ptk->u.auth.tx_mic_key, 8); | |
434 | os_memcpy(ptk->u.auth.tx_mic_key, ptk->u.auth.rx_mic_key, 8); | |
435 | os_memcpy(ptk->u.auth.rx_mic_key, buf, 8); | |
436 | sm->tptk_set = 1; | |
437 | ||
438 | if (wpa_supplicant_send_2_of_4(sm, sm->bssid, key, ver, sm->snonce, | |
439 | sm->assoc_wpa_ie, sm->assoc_wpa_ie_len, | |
440 | ptk)) | |
83935317 | 441 | goto failed; |
6fc6879b JM |
442 | |
443 | os_memcpy(sm->anonce, key->key_nonce, WPA_NONCE_LEN); | |
83935317 JM |
444 | return; |
445 | ||
446 | failed: | |
447 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); | |
6fc6879b JM |
448 | } |
449 | ||
450 | ||
451 | static void wpa_sm_start_preauth(void *eloop_ctx, void *timeout_ctx) | |
452 | { | |
453 | struct wpa_sm *sm = eloop_ctx; | |
454 | rsn_preauth_candidate_process(sm); | |
455 | } | |
456 | ||
457 | ||
458 | static void wpa_supplicant_key_neg_complete(struct wpa_sm *sm, | |
459 | const u8 *addr, int secure) | |
460 | { | |
0f057fb2 JM |
461 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
462 | "WPA: Key negotiation completed with " | |
6fc6879b JM |
463 | MACSTR " [PTK=%s GTK=%s]", MAC2STR(addr), |
464 | wpa_cipher_txt(sm->pairwise_cipher), | |
465 | wpa_cipher_txt(sm->group_cipher)); | |
6fc6879b JM |
466 | wpa_sm_cancel_auth_timeout(sm); |
467 | wpa_sm_set_state(sm, WPA_COMPLETED); | |
468 | ||
469 | if (secure) { | |
470 | wpa_sm_mlme_setprotection( | |
471 | sm, addr, MLME_SETPROTECTION_PROTECT_TYPE_RX_TX, | |
472 | MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); | |
473 | eapol_sm_notify_portValid(sm->eapol, TRUE); | |
56586197 | 474 | if (wpa_key_mgmt_wpa_psk(sm->key_mgmt)) |
6fc6879b JM |
475 | eapol_sm_notify_eap_success(sm->eapol, TRUE); |
476 | /* | |
477 | * Start preauthentication after a short wait to avoid a | |
478 | * possible race condition between the data receive and key | |
479 | * configuration after the 4-Way Handshake. This increases the | |
ffbf1eaa | 480 | * likelihood of the first preauth EAPOL-Start frame getting to |
6fc6879b JM |
481 | * the target AP. |
482 | */ | |
483 | eloop_register_timeout(1, 0, wpa_sm_start_preauth, sm, NULL); | |
484 | } | |
485 | ||
486 | if (sm->cur_pmksa && sm->cur_pmksa->opportunistic) { | |
f049052b BG |
487 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
488 | "RSN: Authenticator accepted " | |
489 | "opportunistic PMKSA entry - marking it valid"); | |
6fc6879b JM |
490 | sm->cur_pmksa->opportunistic = 0; |
491 | } | |
492 | ||
493 | #ifdef CONFIG_IEEE80211R | |
56586197 | 494 | if (wpa_key_mgmt_ft(sm->key_mgmt)) { |
6fc6879b | 495 | /* Prepare for the next transition */ |
76b7981d | 496 | wpa_ft_prepare_auth_request(sm, NULL); |
6fc6879b JM |
497 | } |
498 | #endif /* CONFIG_IEEE80211R */ | |
499 | } | |
500 | ||
501 | ||
581a8cde JM |
502 | static void wpa_sm_rekey_ptk(void *eloop_ctx, void *timeout_ctx) |
503 | { | |
504 | struct wpa_sm *sm = eloop_ctx; | |
f049052b | 505 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Request PTK rekeying"); |
581a8cde JM |
506 | wpa_sm_key_request(sm, 0, 1); |
507 | } | |
508 | ||
509 | ||
6fc6879b JM |
510 | static int wpa_supplicant_install_ptk(struct wpa_sm *sm, |
511 | const struct wpa_eapol_key *key) | |
512 | { | |
513 | int keylen, rsclen; | |
71934751 | 514 | enum wpa_alg alg; |
6fc6879b JM |
515 | const u8 *key_rsc; |
516 | u8 null_rsc[8] = { 0, 0, 0, 0, 0, 0, 0, 0 }; | |
517 | ||
f049052b BG |
518 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
519 | "WPA: Installing PTK to the driver"); | |
6fc6879b | 520 | |
c3550295 | 521 | if (sm->pairwise_cipher == WPA_CIPHER_NONE) { |
f049052b BG |
522 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Pairwise Cipher " |
523 | "Suite: NONE - do not use pairwise keys"); | |
6fc6879b | 524 | return 0; |
c3550295 JM |
525 | } |
526 | ||
527 | if (!wpa_cipher_valid_pairwise(sm->pairwise_cipher)) { | |
f049052b BG |
528 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
529 | "WPA: Unsupported pairwise cipher %d", | |
530 | sm->pairwise_cipher); | |
6fc6879b JM |
531 | return -1; |
532 | } | |
533 | ||
c3550295 JM |
534 | alg = wpa_cipher_to_alg(sm->pairwise_cipher); |
535 | keylen = wpa_cipher_key_len(sm->pairwise_cipher); | |
536 | rsclen = wpa_cipher_rsc_len(sm->pairwise_cipher); | |
537 | ||
6fc6879b JM |
538 | if (sm->proto == WPA_PROTO_RSN) { |
539 | key_rsc = null_rsc; | |
540 | } else { | |
541 | key_rsc = key->key_rsc; | |
542 | wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, rsclen); | |
543 | } | |
544 | ||
545 | if (wpa_sm_set_key(sm, alg, sm->bssid, 0, 1, key_rsc, rsclen, | |
546 | (u8 *) sm->ptk.tk1, keylen) < 0) { | |
f049052b BG |
547 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
548 | "WPA: Failed to set PTK to the " | |
549 | "driver (alg=%d keylen=%d bssid=" MACSTR ")", | |
550 | alg, keylen, MAC2STR(sm->bssid)); | |
6fc6879b JM |
551 | return -1; |
552 | } | |
581a8cde JM |
553 | |
554 | if (sm->wpa_ptk_rekey) { | |
555 | eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); | |
556 | eloop_register_timeout(sm->wpa_ptk_rekey, 0, wpa_sm_rekey_ptk, | |
557 | sm, NULL); | |
558 | } | |
559 | ||
6fc6879b JM |
560 | return 0; |
561 | } | |
562 | ||
563 | ||
f049052b BG |
564 | static int wpa_supplicant_check_group_cipher(struct wpa_sm *sm, |
565 | int group_cipher, | |
6fc6879b | 566 | int keylen, int maxkeylen, |
71934751 JM |
567 | int *key_rsc_len, |
568 | enum wpa_alg *alg) | |
6fc6879b | 569 | { |
c3550295 | 570 | int klen; |
6fc6879b | 571 | |
c3550295 JM |
572 | *alg = wpa_cipher_to_alg(group_cipher); |
573 | if (*alg == WPA_ALG_NONE) { | |
f049052b BG |
574 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
575 | "WPA: Unsupported Group Cipher %d", | |
576 | group_cipher); | |
6fc6879b JM |
577 | return -1; |
578 | } | |
c3550295 | 579 | *key_rsc_len = wpa_cipher_rsc_len(group_cipher); |
6fc6879b | 580 | |
c3550295 JM |
581 | klen = wpa_cipher_key_len(group_cipher); |
582 | if (keylen != klen || maxkeylen < klen) { | |
f049052b BG |
583 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
584 | "WPA: Unsupported %s Group Cipher key length %d (%d)", | |
585 | wpa_cipher_txt(group_cipher), keylen, maxkeylen); | |
c3550295 | 586 | return -1; |
6fc6879b | 587 | } |
c3550295 | 588 | return 0; |
6fc6879b JM |
589 | } |
590 | ||
591 | ||
592 | struct wpa_gtk_data { | |
71934751 | 593 | enum wpa_alg alg; |
6fc6879b JM |
594 | int tx, key_rsc_len, keyidx; |
595 | u8 gtk[32]; | |
596 | int gtk_len; | |
597 | }; | |
598 | ||
599 | ||
600 | static int wpa_supplicant_install_gtk(struct wpa_sm *sm, | |
601 | const struct wpa_gtk_data *gd, | |
602 | const u8 *key_rsc) | |
603 | { | |
604 | const u8 *_gtk = gd->gtk; | |
605 | u8 gtk_buf[32]; | |
606 | ||
607 | wpa_hexdump_key(MSG_DEBUG, "WPA: Group Key", gd->gtk, gd->gtk_len); | |
f049052b BG |
608 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
609 | "WPA: Installing GTK to the driver (keyidx=%d tx=%d len=%d)", | |
610 | gd->keyidx, gd->tx, gd->gtk_len); | |
6fc6879b JM |
611 | wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, gd->key_rsc_len); |
612 | if (sm->group_cipher == WPA_CIPHER_TKIP) { | |
613 | /* Swap Tx/Rx keys for Michael MIC */ | |
614 | os_memcpy(gtk_buf, gd->gtk, 16); | |
615 | os_memcpy(gtk_buf + 16, gd->gtk + 24, 8); | |
616 | os_memcpy(gtk_buf + 24, gd->gtk + 16, 8); | |
617 | _gtk = gtk_buf; | |
618 | } | |
619 | if (sm->pairwise_cipher == WPA_CIPHER_NONE) { | |
0382097e | 620 | if (wpa_sm_set_key(sm, gd->alg, NULL, |
6fc6879b JM |
621 | gd->keyidx, 1, key_rsc, gd->key_rsc_len, |
622 | _gtk, gd->gtk_len) < 0) { | |
f049052b BG |
623 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
624 | "WPA: Failed to set GTK to the driver " | |
625 | "(Group only)"); | |
6fc6879b JM |
626 | return -1; |
627 | } | |
0382097e | 628 | } else if (wpa_sm_set_key(sm, gd->alg, broadcast_ether_addr, |
6fc6879b JM |
629 | gd->keyidx, gd->tx, key_rsc, gd->key_rsc_len, |
630 | _gtk, gd->gtk_len) < 0) { | |
f049052b BG |
631 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
632 | "WPA: Failed to set GTK to " | |
633 | "the driver (alg=%d keylen=%d keyidx=%d)", | |
634 | gd->alg, gd->gtk_len, gd->keyidx); | |
6fc6879b JM |
635 | return -1; |
636 | } | |
637 | ||
638 | return 0; | |
639 | } | |
640 | ||
641 | ||
642 | static int wpa_supplicant_gtk_tx_bit_workaround(const struct wpa_sm *sm, | |
643 | int tx) | |
644 | { | |
645 | if (tx && sm->pairwise_cipher != WPA_CIPHER_NONE) { | |
646 | /* Ignore Tx bit for GTK if a pairwise key is used. One AP | |
647 | * seemed to set this bit (incorrectly, since Tx is only when | |
648 | * doing Group Key only APs) and without this workaround, the | |
649 | * data connection does not work because wpa_supplicant | |
650 | * configured non-zero keyidx to be used for unicast. */ | |
f049052b BG |
651 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
652 | "WPA: Tx bit set for GTK, but pairwise " | |
653 | "keys are used - ignore Tx bit"); | |
6fc6879b JM |
654 | return 0; |
655 | } | |
656 | return tx; | |
657 | } | |
658 | ||
659 | ||
660 | static int wpa_supplicant_pairwise_gtk(struct wpa_sm *sm, | |
661 | const struct wpa_eapol_key *key, | |
662 | const u8 *gtk, size_t gtk_len, | |
663 | int key_info) | |
664 | { | |
6fc6879b JM |
665 | struct wpa_gtk_data gd; |
666 | ||
667 | /* | |
668 | * IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames - Figure 43x | |
669 | * GTK KDE format: | |
670 | * KeyID[bits 0-1], Tx [bit 2], Reserved [bits 3-7] | |
671 | * Reserved [bits 0-7] | |
672 | * GTK | |
673 | */ | |
674 | ||
675 | os_memset(&gd, 0, sizeof(gd)); | |
676 | wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in pairwise handshake", | |
677 | gtk, gtk_len); | |
678 | ||
679 | if (gtk_len < 2 || gtk_len - 2 > sizeof(gd.gtk)) | |
680 | return -1; | |
681 | ||
682 | gd.keyidx = gtk[0] & 0x3; | |
683 | gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm, | |
684 | !!(gtk[0] & BIT(2))); | |
685 | gtk += 2; | |
686 | gtk_len -= 2; | |
687 | ||
688 | os_memcpy(gd.gtk, gtk, gtk_len); | |
689 | gd.gtk_len = gtk_len; | |
690 | ||
dff1e285 JM |
691 | if (sm->group_cipher != WPA_CIPHER_GTK_NOT_USED && |
692 | (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, | |
693 | gtk_len, gtk_len, | |
694 | &gd.key_rsc_len, &gd.alg) || | |
695 | wpa_supplicant_install_gtk(sm, &gd, key->key_rsc))) { | |
f049052b BG |
696 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
697 | "RSN: Failed to install GTK"); | |
6fc6879b JM |
698 | return -1; |
699 | } | |
700 | ||
701 | wpa_supplicant_key_neg_complete(sm, sm->bssid, | |
702 | key_info & WPA_KEY_INFO_SECURE); | |
703 | return 0; | |
6fc6879b JM |
704 | } |
705 | ||
706 | ||
707 | static int ieee80211w_set_keys(struct wpa_sm *sm, | |
708 | struct wpa_eapol_ie_parse *ie) | |
709 | { | |
710 | #ifdef CONFIG_IEEE80211W | |
711 | if (sm->mgmt_group_cipher != WPA_CIPHER_AES_128_CMAC) | |
712 | return 0; | |
713 | ||
714 | if (ie->igtk) { | |
715 | const struct wpa_igtk_kde *igtk; | |
716 | u16 keyidx; | |
717 | if (ie->igtk_len != sizeof(*igtk)) | |
718 | return -1; | |
719 | igtk = (const struct wpa_igtk_kde *) ie->igtk; | |
720 | keyidx = WPA_GET_LE16(igtk->keyid); | |
f049052b BG |
721 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: IGTK keyid %d " |
722 | "pn %02x%02x%02x%02x%02x%02x", | |
723 | keyidx, MAC2STR(igtk->pn)); | |
6fc6879b JM |
724 | wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK", |
725 | igtk->igtk, WPA_IGTK_LEN); | |
726 | if (keyidx > 4095) { | |
f049052b BG |
727 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
728 | "WPA: Invalid IGTK KeyID %d", keyidx); | |
6fc6879b JM |
729 | return -1; |
730 | } | |
0382097e | 731 | if (wpa_sm_set_key(sm, WPA_ALG_IGTK, broadcast_ether_addr, |
6fc6879b JM |
732 | keyidx, 0, igtk->pn, sizeof(igtk->pn), |
733 | igtk->igtk, WPA_IGTK_LEN) < 0) { | |
f049052b BG |
734 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
735 | "WPA: Failed to configure IGTK to the driver"); | |
6fc6879b JM |
736 | return -1; |
737 | } | |
738 | } | |
739 | ||
740 | return 0; | |
741 | #else /* CONFIG_IEEE80211W */ | |
742 | return 0; | |
743 | #endif /* CONFIG_IEEE80211W */ | |
744 | } | |
745 | ||
746 | ||
747 | static void wpa_report_ie_mismatch(struct wpa_sm *sm, | |
748 | const char *reason, const u8 *src_addr, | |
749 | const u8 *wpa_ie, size_t wpa_ie_len, | |
750 | const u8 *rsn_ie, size_t rsn_ie_len) | |
751 | { | |
0f057fb2 | 752 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: %s (src=" MACSTR ")", |
6fc6879b JM |
753 | reason, MAC2STR(src_addr)); |
754 | ||
755 | if (sm->ap_wpa_ie) { | |
756 | wpa_hexdump(MSG_INFO, "WPA: WPA IE in Beacon/ProbeResp", | |
757 | sm->ap_wpa_ie, sm->ap_wpa_ie_len); | |
758 | } | |
759 | if (wpa_ie) { | |
760 | if (!sm->ap_wpa_ie) { | |
f049052b BG |
761 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
762 | "WPA: No WPA IE in Beacon/ProbeResp"); | |
6fc6879b JM |
763 | } |
764 | wpa_hexdump(MSG_INFO, "WPA: WPA IE in 3/4 msg", | |
765 | wpa_ie, wpa_ie_len); | |
766 | } | |
767 | ||
768 | if (sm->ap_rsn_ie) { | |
769 | wpa_hexdump(MSG_INFO, "WPA: RSN IE in Beacon/ProbeResp", | |
770 | sm->ap_rsn_ie, sm->ap_rsn_ie_len); | |
771 | } | |
772 | if (rsn_ie) { | |
773 | if (!sm->ap_rsn_ie) { | |
f049052b BG |
774 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
775 | "WPA: No RSN IE in Beacon/ProbeResp"); | |
6fc6879b JM |
776 | } |
777 | wpa_hexdump(MSG_INFO, "WPA: RSN IE in 3/4 msg", | |
778 | rsn_ie, rsn_ie_len); | |
779 | } | |
780 | ||
3da372fa | 781 | wpa_sm_deauthenticate(sm, WLAN_REASON_IE_IN_4WAY_DIFFERS); |
6fc6879b JM |
782 | } |
783 | ||
784 | ||
5af8187e JM |
785 | #ifdef CONFIG_IEEE80211R |
786 | ||
787 | static int ft_validate_mdie(struct wpa_sm *sm, | |
788 | const unsigned char *src_addr, | |
3b4f6dac JM |
789 | struct wpa_eapol_ie_parse *ie, |
790 | const u8 *assoc_resp_mdie) | |
5af8187e JM |
791 | { |
792 | struct rsn_mdie *mdie; | |
793 | ||
5af8187e JM |
794 | mdie = (struct rsn_mdie *) (ie->mdie + 2); |
795 | if (ie->mdie == NULL || ie->mdie_len < 2 + sizeof(*mdie) || | |
796 | os_memcmp(mdie->mobility_domain, sm->mobility_domain, | |
797 | MOBILITY_DOMAIN_ID_LEN) != 0) { | |
f049052b BG |
798 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE in msg 3/4 did " |
799 | "not match with the current mobility domain"); | |
5af8187e JM |
800 | return -1; |
801 | } | |
802 | ||
3b4f6dac JM |
803 | if (assoc_resp_mdie && |
804 | (assoc_resp_mdie[1] != ie->mdie[1] || | |
805 | os_memcmp(assoc_resp_mdie, ie->mdie, 2 + ie->mdie[1]) != 0)) { | |
f049052b | 806 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE mismatch"); |
3b4f6dac JM |
807 | wpa_hexdump(MSG_DEBUG, "FT: MDIE in EAPOL-Key msg 3/4", |
808 | ie->mdie, 2 + ie->mdie[1]); | |
809 | wpa_hexdump(MSG_DEBUG, "FT: MDIE in (Re)Association Response", | |
810 | assoc_resp_mdie, 2 + assoc_resp_mdie[1]); | |
811 | return -1; | |
812 | } | |
813 | ||
814 | return 0; | |
815 | } | |
816 | ||
817 | ||
818 | static int ft_validate_ftie(struct wpa_sm *sm, | |
819 | const unsigned char *src_addr, | |
820 | struct wpa_eapol_ie_parse *ie, | |
821 | const u8 *assoc_resp_ftie) | |
822 | { | |
823 | if (ie->ftie == NULL) { | |
f049052b BG |
824 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
825 | "FT: No FTIE in EAPOL-Key msg 3/4"); | |
3b4f6dac JM |
826 | return -1; |
827 | } | |
828 | ||
829 | if (assoc_resp_ftie == NULL) | |
830 | return 0; | |
831 | ||
832 | if (assoc_resp_ftie[1] != ie->ftie[1] || | |
833 | os_memcmp(assoc_resp_ftie, ie->ftie, 2 + ie->ftie[1]) != 0) { | |
f049052b | 834 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: FTIE mismatch"); |
3b4f6dac JM |
835 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 3/4", |
836 | ie->ftie, 2 + ie->ftie[1]); | |
837 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)Association Response", | |
838 | assoc_resp_ftie, 2 + assoc_resp_ftie[1]); | |
839 | return -1; | |
840 | } | |
841 | ||
5af8187e JM |
842 | return 0; |
843 | } | |
844 | ||
845 | ||
846 | static int ft_validate_rsnie(struct wpa_sm *sm, | |
847 | const unsigned char *src_addr, | |
848 | struct wpa_eapol_ie_parse *ie) | |
849 | { | |
850 | struct wpa_ie_data rsn; | |
851 | ||
852 | if (!ie->rsn_ie) | |
853 | return 0; | |
854 | ||
855 | /* | |
856 | * Verify that PMKR1Name from EAPOL-Key message 3/4 | |
857 | * matches with the value we derived. | |
858 | */ | |
859 | if (wpa_parse_wpa_ie_rsn(ie->rsn_ie, ie->rsn_ie_len, &rsn) < 0 || | |
860 | rsn.num_pmkid != 1 || rsn.pmkid == NULL) { | |
f049052b BG |
861 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: No PMKR1Name in " |
862 | "FT 4-way handshake message 3/4"); | |
5af8187e JM |
863 | return -1; |
864 | } | |
865 | ||
866 | if (os_memcmp(rsn.pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0) { | |
f049052b BG |
867 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
868 | "FT: PMKR1Name mismatch in " | |
869 | "FT 4-way handshake message 3/4"); | |
5af8187e JM |
870 | wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Authenticator", |
871 | rsn.pmkid, WPA_PMK_NAME_LEN); | |
872 | wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name", | |
873 | sm->pmk_r1_name, WPA_PMK_NAME_LEN); | |
874 | return -1; | |
875 | } | |
876 | ||
877 | return 0; | |
878 | } | |
879 | ||
880 | ||
881 | static int wpa_supplicant_validate_ie_ft(struct wpa_sm *sm, | |
882 | const unsigned char *src_addr, | |
883 | struct wpa_eapol_ie_parse *ie) | |
884 | { | |
3b4f6dac JM |
885 | const u8 *pos, *end, *mdie = NULL, *ftie = NULL; |
886 | ||
887 | if (sm->assoc_resp_ies) { | |
888 | pos = sm->assoc_resp_ies; | |
889 | end = pos + sm->assoc_resp_ies_len; | |
890 | while (pos + 2 < end) { | |
891 | if (pos + 2 + pos[1] > end) | |
892 | break; | |
893 | switch (*pos) { | |
894 | case WLAN_EID_MOBILITY_DOMAIN: | |
895 | mdie = pos; | |
896 | break; | |
897 | case WLAN_EID_FAST_BSS_TRANSITION: | |
898 | ftie = pos; | |
899 | break; | |
900 | } | |
901 | pos += 2 + pos[1]; | |
902 | } | |
903 | } | |
904 | ||
905 | if (ft_validate_mdie(sm, src_addr, ie, mdie) < 0 || | |
906 | ft_validate_ftie(sm, src_addr, ie, ftie) < 0 || | |
5af8187e JM |
907 | ft_validate_rsnie(sm, src_addr, ie) < 0) |
908 | return -1; | |
909 | ||
910 | return 0; | |
911 | } | |
912 | ||
913 | #endif /* CONFIG_IEEE80211R */ | |
914 | ||
915 | ||
6fc6879b JM |
916 | static int wpa_supplicant_validate_ie(struct wpa_sm *sm, |
917 | const unsigned char *src_addr, | |
918 | struct wpa_eapol_ie_parse *ie) | |
919 | { | |
920 | if (sm->ap_wpa_ie == NULL && sm->ap_rsn_ie == NULL) { | |
f049052b BG |
921 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
922 | "WPA: No WPA/RSN IE for this AP known. " | |
923 | "Trying to get from scan results"); | |
6fc6879b | 924 | if (wpa_sm_get_beacon_ie(sm) < 0) { |
f049052b BG |
925 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
926 | "WPA: Could not find AP from " | |
927 | "the scan results"); | |
6fc6879b | 928 | } else { |
f049052b BG |
929 | wpa_msg(sm->ctx->msg_ctx, MSG_DEBUG, |
930 | "WPA: Found the current AP from " | |
931 | "updated scan results"); | |
6fc6879b JM |
932 | } |
933 | } | |
934 | ||
935 | if (ie->wpa_ie == NULL && ie->rsn_ie == NULL && | |
936 | (sm->ap_wpa_ie || sm->ap_rsn_ie)) { | |
937 | wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " | |
938 | "with IE in Beacon/ProbeResp (no IE?)", | |
939 | src_addr, ie->wpa_ie, ie->wpa_ie_len, | |
940 | ie->rsn_ie, ie->rsn_ie_len); | |
941 | return -1; | |
942 | } | |
943 | ||
944 | if ((ie->wpa_ie && sm->ap_wpa_ie && | |
945 | (ie->wpa_ie_len != sm->ap_wpa_ie_len || | |
946 | os_memcmp(ie->wpa_ie, sm->ap_wpa_ie, ie->wpa_ie_len) != 0)) || | |
947 | (ie->rsn_ie && sm->ap_rsn_ie && | |
26e23750 JM |
948 | wpa_compare_rsn_ie(wpa_key_mgmt_ft(sm->key_mgmt), |
949 | sm->ap_rsn_ie, sm->ap_rsn_ie_len, | |
950 | ie->rsn_ie, ie->rsn_ie_len))) { | |
6fc6879b JM |
951 | wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " |
952 | "with IE in Beacon/ProbeResp", | |
953 | src_addr, ie->wpa_ie, ie->wpa_ie_len, | |
954 | ie->rsn_ie, ie->rsn_ie_len); | |
955 | return -1; | |
956 | } | |
957 | ||
958 | if (sm->proto == WPA_PROTO_WPA && | |
959 | ie->rsn_ie && sm->ap_rsn_ie == NULL && sm->rsn_enabled) { | |
960 | wpa_report_ie_mismatch(sm, "Possible downgrade attack " | |
961 | "detected - RSN was enabled and RSN IE " | |
962 | "was in msg 3/4, but not in " | |
963 | "Beacon/ProbeResp", | |
964 | src_addr, ie->wpa_ie, ie->wpa_ie_len, | |
965 | ie->rsn_ie, ie->rsn_ie_len); | |
966 | return -1; | |
967 | } | |
968 | ||
969 | #ifdef CONFIG_IEEE80211R | |
5af8187e JM |
970 | if (wpa_key_mgmt_ft(sm->key_mgmt) && |
971 | wpa_supplicant_validate_ie_ft(sm, src_addr, ie) < 0) | |
972 | return -1; | |
6fc6879b JM |
973 | #endif /* CONFIG_IEEE80211R */ |
974 | ||
975 | return 0; | |
976 | } | |
977 | ||
978 | ||
979 | /** | |
980 | * wpa_supplicant_send_4_of_4 - Send message 4 of WPA/RSN 4-Way Handshake | |
981 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
982 | * @dst: Destination address for the frame | |
983 | * @key: Pointer to the EAPOL-Key frame header | |
984 | * @ver: Version bits from EAPOL-Key Key Info | |
985 | * @key_info: Key Info | |
986 | * @kde: KDEs to include the EAPOL-Key frame | |
987 | * @kde_len: Length of KDEs | |
988 | * @ptk: PTK to use for keyed hash and encryption | |
989 | * Returns: 0 on success, -1 on failure | |
990 | */ | |
991 | int wpa_supplicant_send_4_of_4(struct wpa_sm *sm, const unsigned char *dst, | |
992 | const struct wpa_eapol_key *key, | |
993 | u16 ver, u16 key_info, | |
994 | const u8 *kde, size_t kde_len, | |
995 | struct wpa_ptk *ptk) | |
996 | { | |
997 | size_t rlen; | |
998 | struct wpa_eapol_key *reply; | |
999 | u8 *rbuf; | |
1000 | ||
1001 | if (kde) | |
1002 | wpa_hexdump(MSG_DEBUG, "WPA: KDE for msg 4/4", kde, kde_len); | |
1003 | ||
1004 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, | |
1005 | sizeof(*reply) + kde_len, | |
1006 | &rlen, (void *) &reply); | |
1007 | if (rbuf == NULL) | |
1008 | return -1; | |
1009 | ||
1010 | reply->type = sm->proto == WPA_PROTO_RSN ? | |
1011 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; | |
1012 | key_info &= WPA_KEY_INFO_SECURE; | |
1013 | key_info |= ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_MIC; | |
1014 | WPA_PUT_BE16(reply->key_info, key_info); | |
1015 | if (sm->proto == WPA_PROTO_RSN) | |
1016 | WPA_PUT_BE16(reply->key_length, 0); | |
1017 | else | |
1018 | os_memcpy(reply->key_length, key->key_length, 2); | |
1019 | os_memcpy(reply->replay_counter, key->replay_counter, | |
1020 | WPA_REPLAY_COUNTER_LEN); | |
1021 | ||
1022 | WPA_PUT_BE16(reply->key_data_length, kde_len); | |
1023 | if (kde) | |
1024 | os_memcpy(reply + 1, kde, kde_len); | |
1025 | ||
f049052b | 1026 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 4/4"); |
6fc6879b JM |
1027 | wpa_eapol_key_send(sm, ptk->kck, ver, dst, ETH_P_EAPOL, |
1028 | rbuf, rlen, reply->key_mic); | |
1029 | ||
1030 | return 0; | |
1031 | } | |
1032 | ||
1033 | ||
1034 | static void wpa_supplicant_process_3_of_4(struct wpa_sm *sm, | |
1035 | const struct wpa_eapol_key *key, | |
1036 | u16 ver) | |
1037 | { | |
1038 | u16 key_info, keylen, len; | |
1039 | const u8 *pos; | |
1040 | struct wpa_eapol_ie_parse ie; | |
1041 | ||
1042 | wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE); | |
f049052b BG |
1043 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 3 of 4-Way " |
1044 | "Handshake from " MACSTR " (ver=%d)", MAC2STR(sm->bssid), ver); | |
6fc6879b JM |
1045 | |
1046 | key_info = WPA_GET_BE16(key->key_info); | |
1047 | ||
1048 | pos = (const u8 *) (key + 1); | |
1049 | len = WPA_GET_BE16(key->key_data_length); | |
1050 | wpa_hexdump(MSG_DEBUG, "WPA: IE KeyData", pos, len); | |
d627a939 JM |
1051 | if (wpa_supplicant_parse_ies(pos, len, &ie) < 0) |
1052 | goto failed; | |
6fc6879b | 1053 | if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { |
f049052b BG |
1054 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1055 | "WPA: GTK IE in unencrypted key data"); | |
83935317 | 1056 | goto failed; |
6fc6879b JM |
1057 | } |
1058 | #ifdef CONFIG_IEEE80211W | |
1059 | if (ie.igtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { | |
f049052b BG |
1060 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1061 | "WPA: IGTK KDE in unencrypted key data"); | |
83935317 | 1062 | goto failed; |
6fc6879b JM |
1063 | } |
1064 | ||
1065 | if (ie.igtk && ie.igtk_len != sizeof(struct wpa_igtk_kde)) { | |
f049052b BG |
1066 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1067 | "WPA: Invalid IGTK KDE length %lu", | |
1068 | (unsigned long) ie.igtk_len); | |
83935317 | 1069 | goto failed; |
6fc6879b JM |
1070 | } |
1071 | #endif /* CONFIG_IEEE80211W */ | |
1072 | ||
1073 | if (wpa_supplicant_validate_ie(sm, sm->bssid, &ie) < 0) | |
83935317 | 1074 | goto failed; |
6fc6879b JM |
1075 | |
1076 | if (os_memcmp(sm->anonce, key->key_nonce, WPA_NONCE_LEN) != 0) { | |
f049052b BG |
1077 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1078 | "WPA: ANonce from message 1 of 4-Way Handshake " | |
1079 | "differs from 3 of 4-Way Handshake - drop packet (src=" | |
1080 | MACSTR ")", MAC2STR(sm->bssid)); | |
83935317 | 1081 | goto failed; |
6fc6879b JM |
1082 | } |
1083 | ||
1084 | keylen = WPA_GET_BE16(key->key_length); | |
c3550295 JM |
1085 | if (keylen != wpa_cipher_key_len(sm->pairwise_cipher)) { |
1086 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, | |
1087 | "WPA: Invalid %s key length %d (src=" MACSTR | |
1088 | ")", wpa_cipher_txt(sm->pairwise_cipher), keylen, | |
1089 | MAC2STR(sm->bssid)); | |
1090 | goto failed; | |
6fc6879b JM |
1091 | } |
1092 | ||
1093 | if (wpa_supplicant_send_4_of_4(sm, sm->bssid, key, ver, key_info, | |
83935317 JM |
1094 | NULL, 0, &sm->ptk)) { |
1095 | goto failed; | |
1096 | } | |
6fc6879b JM |
1097 | |
1098 | /* SNonce was successfully used in msg 3/4, so mark it to be renewed | |
1099 | * for the next 4-Way Handshake. If msg 3 is received again, the old | |
1100 | * SNonce will still be used to avoid changing PTK. */ | |
1101 | sm->renew_snonce = 1; | |
1102 | ||
1103 | if (key_info & WPA_KEY_INFO_INSTALL) { | |
83935317 JM |
1104 | if (wpa_supplicant_install_ptk(sm, key)) |
1105 | goto failed; | |
6fc6879b JM |
1106 | } |
1107 | ||
1108 | if (key_info & WPA_KEY_INFO_SECURE) { | |
1109 | wpa_sm_mlme_setprotection( | |
1110 | sm, sm->bssid, MLME_SETPROTECTION_PROTECT_TYPE_RX, | |
1111 | MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); | |
1112 | eapol_sm_notify_portValid(sm->eapol, TRUE); | |
1113 | } | |
1114 | wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); | |
1115 | ||
dff1e285 JM |
1116 | if (sm->group_cipher == WPA_CIPHER_GTK_NOT_USED) { |
1117 | wpa_supplicant_key_neg_complete(sm, sm->bssid, | |
1118 | key_info & WPA_KEY_INFO_SECURE); | |
1119 | } else if (ie.gtk && | |
6fc6879b JM |
1120 | wpa_supplicant_pairwise_gtk(sm, key, |
1121 | ie.gtk, ie.gtk_len, key_info) < 0) { | |
f049052b BG |
1122 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1123 | "RSN: Failed to configure GTK"); | |
83935317 | 1124 | goto failed; |
6fc6879b JM |
1125 | } |
1126 | ||
83935317 | 1127 | if (ieee80211w_set_keys(sm, &ie) < 0) { |
f049052b BG |
1128 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1129 | "RSN: Failed to configure IGTK"); | |
83935317 JM |
1130 | goto failed; |
1131 | } | |
1132 | ||
392e68e8 SD |
1133 | if (ie.gtk) |
1134 | wpa_sm_set_rekey_offload(sm); | |
b14a210c | 1135 | |
83935317 JM |
1136 | return; |
1137 | ||
1138 | failed: | |
1139 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); | |
6fc6879b JM |
1140 | } |
1141 | ||
1142 | ||
1143 | static int wpa_supplicant_process_1_of_2_rsn(struct wpa_sm *sm, | |
1144 | const u8 *keydata, | |
1145 | size_t keydatalen, | |
1146 | u16 key_info, | |
1147 | struct wpa_gtk_data *gd) | |
1148 | { | |
1149 | int maxkeylen; | |
1150 | struct wpa_eapol_ie_parse ie; | |
1151 | ||
1152 | wpa_hexdump(MSG_DEBUG, "RSN: msg 1/2 key data", keydata, keydatalen); | |
d627a939 JM |
1153 | if (wpa_supplicant_parse_ies(keydata, keydatalen, &ie) < 0) |
1154 | return -1; | |
6fc6879b | 1155 | if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { |
f049052b BG |
1156 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1157 | "WPA: GTK IE in unencrypted key data"); | |
6fc6879b JM |
1158 | return -1; |
1159 | } | |
1160 | if (ie.gtk == NULL) { | |
f049052b BG |
1161 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1162 | "WPA: No GTK IE in Group Key msg 1/2"); | |
6fc6879b JM |
1163 | return -1; |
1164 | } | |
1165 | maxkeylen = gd->gtk_len = ie.gtk_len - 2; | |
1166 | ||
f049052b | 1167 | if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, |
6fc6879b JM |
1168 | gd->gtk_len, maxkeylen, |
1169 | &gd->key_rsc_len, &gd->alg)) | |
1170 | return -1; | |
1171 | ||
1172 | wpa_hexdump(MSG_DEBUG, "RSN: received GTK in group key handshake", | |
1173 | ie.gtk, ie.gtk_len); | |
1174 | gd->keyidx = ie.gtk[0] & 0x3; | |
1175 | gd->tx = wpa_supplicant_gtk_tx_bit_workaround(sm, | |
1176 | !!(ie.gtk[0] & BIT(2))); | |
1177 | if (ie.gtk_len - 2 > sizeof(gd->gtk)) { | |
f049052b BG |
1178 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1179 | "RSN: Too long GTK in GTK IE (len=%lu)", | |
1180 | (unsigned long) ie.gtk_len - 2); | |
6fc6879b JM |
1181 | return -1; |
1182 | } | |
1183 | os_memcpy(gd->gtk, ie.gtk + 2, ie.gtk_len - 2); | |
1184 | ||
1185 | if (ieee80211w_set_keys(sm, &ie) < 0) | |
f049052b BG |
1186 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1187 | "RSN: Failed to configure IGTK"); | |
6fc6879b JM |
1188 | |
1189 | return 0; | |
1190 | } | |
1191 | ||
1192 | ||
1193 | static int wpa_supplicant_process_1_of_2_wpa(struct wpa_sm *sm, | |
1194 | const struct wpa_eapol_key *key, | |
1195 | size_t keydatalen, int key_info, | |
1196 | size_t extra_len, u16 ver, | |
1197 | struct wpa_gtk_data *gd) | |
1198 | { | |
1199 | size_t maxkeylen; | |
1200 | u8 ek[32]; | |
1201 | ||
1202 | gd->gtk_len = WPA_GET_BE16(key->key_length); | |
1203 | maxkeylen = keydatalen; | |
1204 | if (keydatalen > extra_len) { | |
f049052b BG |
1205 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1206 | "WPA: Truncated EAPOL-Key packet: " | |
1207 | "key_data_length=%lu > extra_len=%lu", | |
1208 | (unsigned long) keydatalen, (unsigned long) extra_len); | |
6fc6879b JM |
1209 | return -1; |
1210 | } | |
1211 | if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { | |
1212 | if (maxkeylen < 8) { | |
f049052b BG |
1213 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1214 | "WPA: Too short maxkeylen (%lu)", | |
1215 | (unsigned long) maxkeylen); | |
6fc6879b JM |
1216 | return -1; |
1217 | } | |
1218 | maxkeylen -= 8; | |
1219 | } | |
1220 | ||
f049052b | 1221 | if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, |
6fc6879b JM |
1222 | gd->gtk_len, maxkeylen, |
1223 | &gd->key_rsc_len, &gd->alg)) | |
1224 | return -1; | |
1225 | ||
1226 | gd->keyidx = (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> | |
1227 | WPA_KEY_INFO_KEY_INDEX_SHIFT; | |
1228 | if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) { | |
1229 | os_memcpy(ek, key->key_iv, 16); | |
1230 | os_memcpy(ek + 16, sm->ptk.kek, 16); | |
1231 | if (keydatalen > sizeof(gd->gtk)) { | |
f049052b BG |
1232 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1233 | "WPA: RC4 key data too long (%lu)", | |
1234 | (unsigned long) keydatalen); | |
6fc6879b JM |
1235 | return -1; |
1236 | } | |
1237 | os_memcpy(gd->gtk, key + 1, keydatalen); | |
7a215dfc | 1238 | if (rc4_skip(ek, 32, 256, gd->gtk, keydatalen)) { |
f049052b BG |
1239 | wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, |
1240 | "WPA: RC4 failed"); | |
7a215dfc JM |
1241 | return -1; |
1242 | } | |
6fc6879b JM |
1243 | } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { |
1244 | if (keydatalen % 8) { | |
f049052b BG |
1245 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1246 | "WPA: Unsupported AES-WRAP len %lu", | |
1247 | (unsigned long) keydatalen); | |
6fc6879b JM |
1248 | return -1; |
1249 | } | |
1250 | if (maxkeylen > sizeof(gd->gtk)) { | |
f049052b BG |
1251 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1252 | "WPA: AES-WRAP key data " | |
1253 | "too long (keydatalen=%lu maxkeylen=%lu)", | |
1254 | (unsigned long) keydatalen, | |
1255 | (unsigned long) maxkeylen); | |
6fc6879b JM |
1256 | return -1; |
1257 | } | |
1258 | if (aes_unwrap(sm->ptk.kek, maxkeylen / 8, | |
1259 | (const u8 *) (key + 1), gd->gtk)) { | |
f049052b BG |
1260 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1261 | "WPA: AES unwrap failed - could not decrypt " | |
1262 | "GTK"); | |
6fc6879b JM |
1263 | return -1; |
1264 | } | |
1265 | } else { | |
f049052b BG |
1266 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1267 | "WPA: Unsupported key_info type %d", ver); | |
6fc6879b JM |
1268 | return -1; |
1269 | } | |
1270 | gd->tx = wpa_supplicant_gtk_tx_bit_workaround( | |
1271 | sm, !!(key_info & WPA_KEY_INFO_TXRX)); | |
1272 | return 0; | |
1273 | } | |
1274 | ||
1275 | ||
1276 | static int wpa_supplicant_send_2_of_2(struct wpa_sm *sm, | |
1277 | const struct wpa_eapol_key *key, | |
1278 | int ver, u16 key_info) | |
1279 | { | |
1280 | size_t rlen; | |
1281 | struct wpa_eapol_key *reply; | |
1282 | u8 *rbuf; | |
1283 | ||
1284 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, | |
1285 | sizeof(*reply), &rlen, (void *) &reply); | |
1286 | if (rbuf == NULL) | |
1287 | return -1; | |
1288 | ||
1289 | reply->type = sm->proto == WPA_PROTO_RSN ? | |
1290 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; | |
1291 | key_info &= WPA_KEY_INFO_KEY_INDEX_MASK; | |
1292 | key_info |= ver | WPA_KEY_INFO_MIC | WPA_KEY_INFO_SECURE; | |
1293 | WPA_PUT_BE16(reply->key_info, key_info); | |
1294 | if (sm->proto == WPA_PROTO_RSN) | |
1295 | WPA_PUT_BE16(reply->key_length, 0); | |
1296 | else | |
1297 | os_memcpy(reply->key_length, key->key_length, 2); | |
1298 | os_memcpy(reply->replay_counter, key->replay_counter, | |
1299 | WPA_REPLAY_COUNTER_LEN); | |
1300 | ||
1301 | WPA_PUT_BE16(reply->key_data_length, 0); | |
1302 | ||
f049052b | 1303 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/2"); |
6fc6879b JM |
1304 | wpa_eapol_key_send(sm, sm->ptk.kck, ver, sm->bssid, ETH_P_EAPOL, |
1305 | rbuf, rlen, reply->key_mic); | |
1306 | ||
1307 | return 0; | |
1308 | } | |
1309 | ||
1310 | ||
1311 | static void wpa_supplicant_process_1_of_2(struct wpa_sm *sm, | |
1312 | const unsigned char *src_addr, | |
1313 | const struct wpa_eapol_key *key, | |
1314 | int extra_len, u16 ver) | |
1315 | { | |
1316 | u16 key_info, keydatalen; | |
1317 | int rekey, ret; | |
1318 | struct wpa_gtk_data gd; | |
1319 | ||
1320 | os_memset(&gd, 0, sizeof(gd)); | |
1321 | ||
1322 | rekey = wpa_sm_get_state(sm) == WPA_COMPLETED; | |
f049052b BG |
1323 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of Group Key " |
1324 | "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver); | |
6fc6879b JM |
1325 | |
1326 | key_info = WPA_GET_BE16(key->key_info); | |
1327 | keydatalen = WPA_GET_BE16(key->key_data_length); | |
1328 | ||
1329 | if (sm->proto == WPA_PROTO_RSN) { | |
1330 | ret = wpa_supplicant_process_1_of_2_rsn(sm, | |
1331 | (const u8 *) (key + 1), | |
1332 | keydatalen, key_info, | |
1333 | &gd); | |
1334 | } else { | |
1335 | ret = wpa_supplicant_process_1_of_2_wpa(sm, key, keydatalen, | |
1336 | key_info, extra_len, | |
1337 | ver, &gd); | |
1338 | } | |
1339 | ||
1340 | wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); | |
1341 | ||
1342 | if (ret) | |
83935317 | 1343 | goto failed; |
6fc6879b JM |
1344 | |
1345 | if (wpa_supplicant_install_gtk(sm, &gd, key->key_rsc) || | |
1346 | wpa_supplicant_send_2_of_2(sm, key, ver, key_info)) | |
83935317 | 1347 | goto failed; |
6fc6879b JM |
1348 | |
1349 | if (rekey) { | |
0f057fb2 | 1350 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Group rekeying " |
6fc6879b JM |
1351 | "completed with " MACSTR " [GTK=%s]", |
1352 | MAC2STR(sm->bssid), wpa_cipher_txt(sm->group_cipher)); | |
1353 | wpa_sm_cancel_auth_timeout(sm); | |
1354 | wpa_sm_set_state(sm, WPA_COMPLETED); | |
1355 | } else { | |
1356 | wpa_supplicant_key_neg_complete(sm, sm->bssid, | |
1357 | key_info & | |
1358 | WPA_KEY_INFO_SECURE); | |
1359 | } | |
392e68e8 SD |
1360 | |
1361 | wpa_sm_set_rekey_offload(sm); | |
1362 | ||
83935317 JM |
1363 | return; |
1364 | ||
1365 | failed: | |
1366 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); | |
6fc6879b JM |
1367 | } |
1368 | ||
1369 | ||
1370 | static int wpa_supplicant_verify_eapol_key_mic(struct wpa_sm *sm, | |
1371 | struct wpa_eapol_key *key, | |
1372 | u16 ver, | |
1373 | const u8 *buf, size_t len) | |
1374 | { | |
1375 | u8 mic[16]; | |
1376 | int ok = 0; | |
1377 | ||
1378 | os_memcpy(mic, key->key_mic, 16); | |
1379 | if (sm->tptk_set) { | |
1380 | os_memset(key->key_mic, 0, 16); | |
1381 | wpa_eapol_key_mic(sm->tptk.kck, ver, buf, len, | |
1382 | key->key_mic); | |
1383 | if (os_memcmp(mic, key->key_mic, 16) != 0) { | |
f049052b BG |
1384 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1385 | "WPA: Invalid EAPOL-Key MIC " | |
1386 | "when using TPTK - ignoring TPTK"); | |
6fc6879b JM |
1387 | } else { |
1388 | ok = 1; | |
1389 | sm->tptk_set = 0; | |
1390 | sm->ptk_set = 1; | |
1391 | os_memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk)); | |
1392 | } | |
1393 | } | |
1394 | ||
1395 | if (!ok && sm->ptk_set) { | |
1396 | os_memset(key->key_mic, 0, 16); | |
1397 | wpa_eapol_key_mic(sm->ptk.kck, ver, buf, len, | |
1398 | key->key_mic); | |
1399 | if (os_memcmp(mic, key->key_mic, 16) != 0) { | |
f049052b BG |
1400 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1401 | "WPA: Invalid EAPOL-Key MIC - " | |
1402 | "dropping packet"); | |
6fc6879b JM |
1403 | return -1; |
1404 | } | |
1405 | ok = 1; | |
1406 | } | |
1407 | ||
1408 | if (!ok) { | |
f049052b BG |
1409 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1410 | "WPA: Could not verify EAPOL-Key MIC - " | |
1411 | "dropping packet"); | |
6fc6879b JM |
1412 | return -1; |
1413 | } | |
1414 | ||
1415 | os_memcpy(sm->rx_replay_counter, key->replay_counter, | |
1416 | WPA_REPLAY_COUNTER_LEN); | |
1417 | sm->rx_replay_counter_set = 1; | |
1418 | return 0; | |
1419 | } | |
1420 | ||
1421 | ||
1422 | /* Decrypt RSN EAPOL-Key key data (RC4 or AES-WRAP) */ | |
1423 | static int wpa_supplicant_decrypt_key_data(struct wpa_sm *sm, | |
1424 | struct wpa_eapol_key *key, u16 ver) | |
1425 | { | |
1426 | u16 keydatalen = WPA_GET_BE16(key->key_data_length); | |
1427 | ||
1428 | wpa_hexdump(MSG_DEBUG, "RSN: encrypted key data", | |
1429 | (u8 *) (key + 1), keydatalen); | |
1430 | if (!sm->ptk_set) { | |
f049052b BG |
1431 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1432 | "WPA: PTK not available, cannot decrypt EAPOL-Key Key " | |
1433 | "Data"); | |
6fc6879b JM |
1434 | return -1; |
1435 | } | |
1436 | ||
1437 | /* Decrypt key data here so that this operation does not need | |
1438 | * to be implemented separately for each message type. */ | |
1439 | if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) { | |
1440 | u8 ek[32]; | |
1441 | os_memcpy(ek, key->key_iv, 16); | |
1442 | os_memcpy(ek + 16, sm->ptk.kek, 16); | |
7a215dfc | 1443 | if (rc4_skip(ek, 32, 256, (u8 *) (key + 1), keydatalen)) { |
f049052b BG |
1444 | wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, |
1445 | "WPA: RC4 failed"); | |
7a215dfc JM |
1446 | return -1; |
1447 | } | |
6fc6879b JM |
1448 | } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || |
1449 | ver == WPA_KEY_INFO_TYPE_AES_128_CMAC) { | |
1450 | u8 *buf; | |
1451 | if (keydatalen % 8) { | |
f049052b BG |
1452 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1453 | "WPA: Unsupported AES-WRAP len %d", | |
1454 | keydatalen); | |
6fc6879b JM |
1455 | return -1; |
1456 | } | |
1457 | keydatalen -= 8; /* AES-WRAP adds 8 bytes */ | |
1458 | buf = os_malloc(keydatalen); | |
1459 | if (buf == NULL) { | |
f049052b BG |
1460 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1461 | "WPA: No memory for AES-UNWRAP buffer"); | |
6fc6879b JM |
1462 | return -1; |
1463 | } | |
1464 | if (aes_unwrap(sm->ptk.kek, keydatalen / 8, | |
1465 | (u8 *) (key + 1), buf)) { | |
1466 | os_free(buf); | |
f049052b BG |
1467 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1468 | "WPA: AES unwrap failed - " | |
1469 | "could not decrypt EAPOL-Key key data"); | |
6fc6879b JM |
1470 | return -1; |
1471 | } | |
1472 | os_memcpy(key + 1, buf, keydatalen); | |
1473 | os_free(buf); | |
1474 | WPA_PUT_BE16(key->key_data_length, keydatalen); | |
1475 | } else { | |
f049052b BG |
1476 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1477 | "WPA: Unsupported key_info type %d", ver); | |
6fc6879b JM |
1478 | return -1; |
1479 | } | |
1480 | wpa_hexdump_key(MSG_DEBUG, "WPA: decrypted EAPOL-Key key data", | |
1481 | (u8 *) (key + 1), keydatalen); | |
1482 | return 0; | |
1483 | } | |
1484 | ||
1485 | ||
1486 | /** | |
1487 | * wpa_sm_aborted_cached - Notify WPA that PMKSA caching was aborted | |
1488 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
1489 | */ | |
1490 | void wpa_sm_aborted_cached(struct wpa_sm *sm) | |
1491 | { | |
1492 | if (sm && sm->cur_pmksa) { | |
f049052b BG |
1493 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1494 | "RSN: Cancelling PMKSA caching attempt"); | |
6fc6879b JM |
1495 | sm->cur_pmksa = NULL; |
1496 | } | |
1497 | } | |
1498 | ||
1499 | ||
f049052b BG |
1500 | static void wpa_eapol_key_dump(struct wpa_sm *sm, |
1501 | const struct wpa_eapol_key *key) | |
6fc6879b JM |
1502 | { |
1503 | #ifndef CONFIG_NO_STDOUT_DEBUG | |
1504 | u16 key_info = WPA_GET_BE16(key->key_info); | |
1505 | ||
f049052b BG |
1506 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, " EAPOL-Key type=%d", key->type); |
1507 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
1508 | " key_info 0x%x (ver=%d keyidx=%d rsvd=%d %s%s%s%s%s%s%s%s)", | |
1509 | key_info, key_info & WPA_KEY_INFO_TYPE_MASK, | |
1510 | (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> | |
1511 | WPA_KEY_INFO_KEY_INDEX_SHIFT, | |
1512 | (key_info & (BIT(13) | BIT(14) | BIT(15))) >> 13, | |
1513 | key_info & WPA_KEY_INFO_KEY_TYPE ? "Pairwise" : "Group", | |
1514 | key_info & WPA_KEY_INFO_INSTALL ? " Install" : "", | |
1515 | key_info & WPA_KEY_INFO_ACK ? " Ack" : "", | |
1516 | key_info & WPA_KEY_INFO_MIC ? " MIC" : "", | |
1517 | key_info & WPA_KEY_INFO_SECURE ? " Secure" : "", | |
1518 | key_info & WPA_KEY_INFO_ERROR ? " Error" : "", | |
1519 | key_info & WPA_KEY_INFO_REQUEST ? " Request" : "", | |
1520 | key_info & WPA_KEY_INFO_ENCR_KEY_DATA ? " Encr" : ""); | |
1521 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
1522 | " key_length=%u key_data_length=%u", | |
1523 | WPA_GET_BE16(key->key_length), | |
1524 | WPA_GET_BE16(key->key_data_length)); | |
6fc6879b JM |
1525 | wpa_hexdump(MSG_DEBUG, " replay_counter", |
1526 | key->replay_counter, WPA_REPLAY_COUNTER_LEN); | |
1527 | wpa_hexdump(MSG_DEBUG, " key_nonce", key->key_nonce, WPA_NONCE_LEN); | |
1528 | wpa_hexdump(MSG_DEBUG, " key_iv", key->key_iv, 16); | |
1529 | wpa_hexdump(MSG_DEBUG, " key_rsc", key->key_rsc, 8); | |
1530 | wpa_hexdump(MSG_DEBUG, " key_id (reserved)", key->key_id, 8); | |
1531 | wpa_hexdump(MSG_DEBUG, " key_mic", key->key_mic, 16); | |
1532 | #endif /* CONFIG_NO_STDOUT_DEBUG */ | |
1533 | } | |
1534 | ||
1535 | ||
1536 | /** | |
1537 | * wpa_sm_rx_eapol - Process received WPA EAPOL frames | |
1538 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
1539 | * @src_addr: Source MAC address of the EAPOL packet | |
1540 | * @buf: Pointer to the beginning of the EAPOL data (EAPOL header) | |
1541 | * @len: Length of the EAPOL frame | |
1542 | * Returns: 1 = WPA EAPOL-Key processed, 0 = not a WPA EAPOL-Key, -1 failure | |
1543 | * | |
1544 | * This function is called for each received EAPOL frame. Other than EAPOL-Key | |
1545 | * frames can be skipped if filtering is done elsewhere. wpa_sm_rx_eapol() is | |
1546 | * only processing WPA and WPA2 EAPOL-Key frames. | |
1547 | * | |
1548 | * The received EAPOL-Key packets are validated and valid packets are replied | |
1549 | * to. In addition, key material (PTK, GTK) is configured at the end of a | |
1550 | * successful key handshake. | |
1551 | */ | |
1552 | int wpa_sm_rx_eapol(struct wpa_sm *sm, const u8 *src_addr, | |
1553 | const u8 *buf, size_t len) | |
1554 | { | |
1555 | size_t plen, data_len, extra_len; | |
1556 | struct ieee802_1x_hdr *hdr; | |
1557 | struct wpa_eapol_key *key; | |
1558 | u16 key_info, ver; | |
1559 | u8 *tmp; | |
1560 | int ret = -1; | |
1561 | struct wpa_peerkey *peerkey = NULL; | |
1562 | ||
1563 | #ifdef CONFIG_IEEE80211R | |
1564 | sm->ft_completed = 0; | |
1565 | #endif /* CONFIG_IEEE80211R */ | |
1566 | ||
1567 | if (len < sizeof(*hdr) + sizeof(*key)) { | |
f049052b BG |
1568 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1569 | "WPA: EAPOL frame too short to be a WPA " | |
1570 | "EAPOL-Key (len %lu, expecting at least %lu)", | |
1571 | (unsigned long) len, | |
1572 | (unsigned long) sizeof(*hdr) + sizeof(*key)); | |
6fc6879b JM |
1573 | return 0; |
1574 | } | |
1575 | ||
1576 | tmp = os_malloc(len); | |
1577 | if (tmp == NULL) | |
1578 | return -1; | |
1579 | os_memcpy(tmp, buf, len); | |
1580 | ||
1581 | hdr = (struct ieee802_1x_hdr *) tmp; | |
1582 | key = (struct wpa_eapol_key *) (hdr + 1); | |
1583 | plen = be_to_host16(hdr->length); | |
1584 | data_len = plen + sizeof(*hdr); | |
f049052b BG |
1585 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1586 | "IEEE 802.1X RX: version=%d type=%d length=%lu", | |
1587 | hdr->version, hdr->type, (unsigned long) plen); | |
6fc6879b JM |
1588 | |
1589 | if (hdr->version < EAPOL_VERSION) { | |
1590 | /* TODO: backwards compatibility */ | |
1591 | } | |
1592 | if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) { | |
f049052b BG |
1593 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1594 | "WPA: EAPOL frame (type %u) discarded, " | |
6fc6879b JM |
1595 | "not a Key frame", hdr->type); |
1596 | ret = 0; | |
1597 | goto out; | |
1598 | } | |
1599 | if (plen > len - sizeof(*hdr) || plen < sizeof(*key)) { | |
f049052b BG |
1600 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1601 | "WPA: EAPOL frame payload size %lu " | |
1602 | "invalid (frame size %lu)", | |
1603 | (unsigned long) plen, (unsigned long) len); | |
6fc6879b JM |
1604 | ret = 0; |
1605 | goto out; | |
1606 | } | |
1607 | ||
1608 | if (key->type != EAPOL_KEY_TYPE_WPA && key->type != EAPOL_KEY_TYPE_RSN) | |
1609 | { | |
f049052b BG |
1610 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1611 | "WPA: EAPOL-Key type (%d) unknown, discarded", | |
1612 | key->type); | |
6fc6879b JM |
1613 | ret = 0; |
1614 | goto out; | |
1615 | } | |
f049052b | 1616 | wpa_eapol_key_dump(sm, key); |
6fc6879b JM |
1617 | |
1618 | eapol_sm_notify_lower_layer_success(sm->eapol, 0); | |
1619 | wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL-Key", tmp, len); | |
1620 | if (data_len < len) { | |
f049052b BG |
1621 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1622 | "WPA: ignoring %lu bytes after the IEEE 802.1X data", | |
1623 | (unsigned long) len - data_len); | |
6fc6879b JM |
1624 | } |
1625 | key_info = WPA_GET_BE16(key->key_info); | |
1626 | ver = key_info & WPA_KEY_INFO_TYPE_MASK; | |
1627 | if (ver != WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && | |
a20088e5 | 1628 | #if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W) |
6fc6879b | 1629 | ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && |
a20088e5 | 1630 | #endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */ |
6fc6879b | 1631 | ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { |
f049052b BG |
1632 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1633 | "WPA: Unsupported EAPOL-Key descriptor version %d", | |
1634 | ver); | |
6fc6879b JM |
1635 | goto out; |
1636 | } | |
1637 | ||
1638 | #ifdef CONFIG_IEEE80211R | |
56586197 | 1639 | if (wpa_key_mgmt_ft(sm->key_mgmt)) { |
6fc6879b JM |
1640 | /* IEEE 802.11r uses a new key_info type (AES-128-CMAC). */ |
1641 | if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) { | |
f049052b BG |
1642 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1643 | "FT: AP did not use AES-128-CMAC"); | |
6fc6879b JM |
1644 | goto out; |
1645 | } | |
1646 | } else | |
1647 | #endif /* CONFIG_IEEE80211R */ | |
56586197 JM |
1648 | #ifdef CONFIG_IEEE80211W |
1649 | if (wpa_key_mgmt_sha256(sm->key_mgmt)) { | |
1650 | if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) { | |
f049052b BG |
1651 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1652 | "WPA: AP did not use the " | |
1653 | "negotiated AES-128-CMAC"); | |
56586197 JM |
1654 | goto out; |
1655 | } | |
1656 | } else | |
1657 | #endif /* CONFIG_IEEE80211W */ | |
6fc6879b JM |
1658 | if (sm->pairwise_cipher == WPA_CIPHER_CCMP && |
1659 | ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { | |
f049052b BG |
1660 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1661 | "WPA: CCMP is used, but EAPOL-Key " | |
1662 | "descriptor version (%d) is not 2", ver); | |
6fc6879b JM |
1663 | if (sm->group_cipher != WPA_CIPHER_CCMP && |
1664 | !(key_info & WPA_KEY_INFO_KEY_TYPE)) { | |
1665 | /* Earlier versions of IEEE 802.11i did not explicitly | |
1666 | * require version 2 descriptor for all EAPOL-Key | |
1667 | * packets, so allow group keys to use version 1 if | |
1668 | * CCMP is not used for them. */ | |
f049052b BG |
1669 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1670 | "WPA: Backwards compatibility: allow invalid " | |
1671 | "version for non-CCMP group keys"); | |
6fc6879b JM |
1672 | } else |
1673 | goto out; | |
1674 | } | |
eb7719ff JM |
1675 | if (sm->pairwise_cipher == WPA_CIPHER_GCMP && |
1676 | ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { | |
1677 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, | |
1678 | "WPA: GCMP is used, but EAPOL-Key " | |
1679 | "descriptor version (%d) is not 2", ver); | |
1680 | goto out; | |
1681 | } | |
6fc6879b JM |
1682 | |
1683 | #ifdef CONFIG_PEERKEY | |
1684 | for (peerkey = sm->peerkey; peerkey; peerkey = peerkey->next) { | |
1685 | if (os_memcmp(peerkey->addr, src_addr, ETH_ALEN) == 0) | |
1686 | break; | |
1687 | } | |
1688 | ||
1689 | if (!(key_info & WPA_KEY_INFO_SMK_MESSAGE) && peerkey) { | |
1690 | if (!peerkey->initiator && peerkey->replay_counter_set && | |
1691 | os_memcmp(key->replay_counter, peerkey->replay_counter, | |
1692 | WPA_REPLAY_COUNTER_LEN) <= 0) { | |
f049052b BG |
1693 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1694 | "RSN: EAPOL-Key Replay Counter did not " | |
1695 | "increase (STK) - dropping packet"); | |
6fc6879b JM |
1696 | goto out; |
1697 | } else if (peerkey->initiator) { | |
1698 | u8 _tmp[WPA_REPLAY_COUNTER_LEN]; | |
1699 | os_memcpy(_tmp, key->replay_counter, | |
1700 | WPA_REPLAY_COUNTER_LEN); | |
1701 | inc_byte_array(_tmp, WPA_REPLAY_COUNTER_LEN); | |
1702 | if (os_memcmp(_tmp, peerkey->replay_counter, | |
1703 | WPA_REPLAY_COUNTER_LEN) != 0) { | |
f049052b BG |
1704 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1705 | "RSN: EAPOL-Key Replay " | |
1706 | "Counter did not match (STK) - " | |
1707 | "dropping packet"); | |
6fc6879b JM |
1708 | goto out; |
1709 | } | |
1710 | } | |
1711 | } | |
1712 | ||
1713 | if (peerkey && peerkey->initiator && (key_info & WPA_KEY_INFO_ACK)) { | |
f049052b BG |
1714 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1715 | "RSN: Ack bit in key_info from STK peer"); | |
6fc6879b JM |
1716 | goto out; |
1717 | } | |
1718 | #endif /* CONFIG_PEERKEY */ | |
1719 | ||
1720 | if (!peerkey && sm->rx_replay_counter_set && | |
1721 | os_memcmp(key->replay_counter, sm->rx_replay_counter, | |
1722 | WPA_REPLAY_COUNTER_LEN) <= 0) { | |
f049052b BG |
1723 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1724 | "WPA: EAPOL-Key Replay Counter did not increase - " | |
1725 | "dropping packet"); | |
6fc6879b JM |
1726 | goto out; |
1727 | } | |
1728 | ||
1729 | if (!(key_info & (WPA_KEY_INFO_ACK | WPA_KEY_INFO_SMK_MESSAGE)) | |
1730 | #ifdef CONFIG_PEERKEY | |
1731 | && (peerkey == NULL || !peerkey->initiator) | |
1732 | #endif /* CONFIG_PEERKEY */ | |
1733 | ) { | |
f049052b BG |
1734 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1735 | "WPA: No Ack bit in key_info"); | |
6fc6879b JM |
1736 | goto out; |
1737 | } | |
1738 | ||
1739 | if (key_info & WPA_KEY_INFO_REQUEST) { | |
f049052b BG |
1740 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1741 | "WPA: EAPOL-Key with Request bit - dropped"); | |
6fc6879b JM |
1742 | goto out; |
1743 | } | |
1744 | ||
1745 | if ((key_info & WPA_KEY_INFO_MIC) && !peerkey && | |
1746 | wpa_supplicant_verify_eapol_key_mic(sm, key, ver, tmp, data_len)) | |
1747 | goto out; | |
1748 | ||
1749 | #ifdef CONFIG_PEERKEY | |
1750 | if ((key_info & WPA_KEY_INFO_MIC) && peerkey && | |
1751 | peerkey_verify_eapol_key_mic(sm, peerkey, key, ver, tmp, data_len)) | |
1752 | goto out; | |
1753 | #endif /* CONFIG_PEERKEY */ | |
1754 | ||
1755 | extra_len = data_len - sizeof(*hdr) - sizeof(*key); | |
1756 | ||
1757 | if (WPA_GET_BE16(key->key_data_length) > extra_len) { | |
0f057fb2 | 1758 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Invalid EAPOL-Key " |
6fc6879b JM |
1759 | "frame - key_data overflow (%d > %lu)", |
1760 | WPA_GET_BE16(key->key_data_length), | |
1761 | (unsigned long) extra_len); | |
1762 | goto out; | |
1763 | } | |
1764 | extra_len = WPA_GET_BE16(key->key_data_length); | |
1765 | ||
1766 | if (sm->proto == WPA_PROTO_RSN && | |
1767 | (key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { | |
1768 | if (wpa_supplicant_decrypt_key_data(sm, key, ver)) | |
1769 | goto out; | |
1770 | extra_len = WPA_GET_BE16(key->key_data_length); | |
1771 | } | |
1772 | ||
1773 | if (key_info & WPA_KEY_INFO_KEY_TYPE) { | |
1774 | if (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) { | |
f049052b BG |
1775 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1776 | "WPA: Ignored EAPOL-Key (Pairwise) with " | |
1777 | "non-zero key index"); | |
6fc6879b JM |
1778 | goto out; |
1779 | } | |
1780 | if (peerkey) { | |
1781 | /* PeerKey 4-Way Handshake */ | |
1782 | peerkey_rx_eapol_4way(sm, peerkey, key, key_info, ver); | |
1783 | } else if (key_info & WPA_KEY_INFO_MIC) { | |
1784 | /* 3/4 4-Way Handshake */ | |
1785 | wpa_supplicant_process_3_of_4(sm, key, ver); | |
1786 | } else { | |
1787 | /* 1/4 4-Way Handshake */ | |
1788 | wpa_supplicant_process_1_of_4(sm, src_addr, key, | |
1789 | ver); | |
1790 | } | |
1791 | } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) { | |
1792 | /* PeerKey SMK Handshake */ | |
1793 | peerkey_rx_eapol_smk(sm, src_addr, key, extra_len, key_info, | |
1794 | ver); | |
1795 | } else { | |
1796 | if (key_info & WPA_KEY_INFO_MIC) { | |
1797 | /* 1/2 Group Key Handshake */ | |
1798 | wpa_supplicant_process_1_of_2(sm, src_addr, key, | |
1799 | extra_len, ver); | |
1800 | } else { | |
f049052b BG |
1801 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1802 | "WPA: EAPOL-Key (Group) without Mic bit - " | |
1803 | "dropped"); | |
6fc6879b JM |
1804 | } |
1805 | } | |
1806 | ||
1807 | ret = 1; | |
1808 | ||
1809 | out: | |
1810 | os_free(tmp); | |
1811 | return ret; | |
1812 | } | |
1813 | ||
1814 | ||
1815 | #ifdef CONFIG_CTRL_IFACE | |
6fc6879b JM |
1816 | static u32 wpa_key_mgmt_suite(struct wpa_sm *sm) |
1817 | { | |
1818 | switch (sm->key_mgmt) { | |
1819 | case WPA_KEY_MGMT_IEEE8021X: | |
1820 | return (sm->proto == WPA_PROTO_RSN ? | |
1821 | RSN_AUTH_KEY_MGMT_UNSPEC_802_1X : | |
1822 | WPA_AUTH_KEY_MGMT_UNSPEC_802_1X); | |
1823 | case WPA_KEY_MGMT_PSK: | |
1824 | return (sm->proto == WPA_PROTO_RSN ? | |
1825 | RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X : | |
1826 | WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X); | |
1827 | #ifdef CONFIG_IEEE80211R | |
1828 | case WPA_KEY_MGMT_FT_IEEE8021X: | |
1829 | return RSN_AUTH_KEY_MGMT_FT_802_1X; | |
1830 | case WPA_KEY_MGMT_FT_PSK: | |
1831 | return RSN_AUTH_KEY_MGMT_FT_PSK; | |
1832 | #endif /* CONFIG_IEEE80211R */ | |
56586197 JM |
1833 | #ifdef CONFIG_IEEE80211W |
1834 | case WPA_KEY_MGMT_IEEE8021X_SHA256: | |
1835 | return RSN_AUTH_KEY_MGMT_802_1X_SHA256; | |
1836 | case WPA_KEY_MGMT_PSK_SHA256: | |
1837 | return RSN_AUTH_KEY_MGMT_PSK_SHA256; | |
1838 | #endif /* CONFIG_IEEE80211W */ | |
369c8d7b JM |
1839 | case WPA_KEY_MGMT_CCKM: |
1840 | return (sm->proto == WPA_PROTO_RSN ? | |
1841 | RSN_AUTH_KEY_MGMT_CCKM: | |
1842 | WPA_AUTH_KEY_MGMT_CCKM); | |
6fc6879b JM |
1843 | case WPA_KEY_MGMT_WPA_NONE: |
1844 | return WPA_AUTH_KEY_MGMT_NONE; | |
1845 | default: | |
1846 | return 0; | |
1847 | } | |
1848 | } | |
1849 | ||
1850 | ||
6fc6879b JM |
1851 | #define RSN_SUITE "%02x-%02x-%02x-%d" |
1852 | #define RSN_SUITE_ARG(s) \ | |
1853 | ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff | |
1854 | ||
1855 | /** | |
1856 | * wpa_sm_get_mib - Dump text list of MIB entries | |
1857 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
1858 | * @buf: Buffer for the list | |
1859 | * @buflen: Length of the buffer | |
1860 | * Returns: Number of bytes written to buffer | |
1861 | * | |
1862 | * This function is used fetch dot11 MIB variables. | |
1863 | */ | |
1864 | int wpa_sm_get_mib(struct wpa_sm *sm, char *buf, size_t buflen) | |
1865 | { | |
1866 | char pmkid_txt[PMKID_LEN * 2 + 1]; | |
1867 | int rsna, ret; | |
1868 | size_t len; | |
1869 | ||
1870 | if (sm->cur_pmksa) { | |
1871 | wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt), | |
1872 | sm->cur_pmksa->pmkid, PMKID_LEN); | |
1873 | } else | |
1874 | pmkid_txt[0] = '\0'; | |
1875 | ||
56586197 JM |
1876 | if ((wpa_key_mgmt_wpa_psk(sm->key_mgmt) || |
1877 | wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt)) && | |
6fc6879b JM |
1878 | sm->proto == WPA_PROTO_RSN) |
1879 | rsna = 1; | |
1880 | else | |
1881 | rsna = 0; | |
1882 | ||
1883 | ret = os_snprintf(buf, buflen, | |
1884 | "dot11RSNAOptionImplemented=TRUE\n" | |
1885 | "dot11RSNAPreauthenticationImplemented=TRUE\n" | |
1886 | "dot11RSNAEnabled=%s\n" | |
1887 | "dot11RSNAPreauthenticationEnabled=%s\n" | |
1888 | "dot11RSNAConfigVersion=%d\n" | |
1889 | "dot11RSNAConfigPairwiseKeysSupported=5\n" | |
1890 | "dot11RSNAConfigGroupCipherSize=%d\n" | |
1891 | "dot11RSNAConfigPMKLifetime=%d\n" | |
1892 | "dot11RSNAConfigPMKReauthThreshold=%d\n" | |
1893 | "dot11RSNAConfigNumberOfPTKSAReplayCounters=1\n" | |
1894 | "dot11RSNAConfigSATimeout=%d\n", | |
1895 | rsna ? "TRUE" : "FALSE", | |
1896 | rsna ? "TRUE" : "FALSE", | |
1897 | RSN_VERSION, | |
c3550295 | 1898 | wpa_cipher_key_len(sm->group_cipher) * 8, |
6fc6879b JM |
1899 | sm->dot11RSNAConfigPMKLifetime, |
1900 | sm->dot11RSNAConfigPMKReauthThreshold, | |
1901 | sm->dot11RSNAConfigSATimeout); | |
1902 | if (ret < 0 || (size_t) ret >= buflen) | |
1903 | return 0; | |
1904 | len = ret; | |
1905 | ||
1906 | ret = os_snprintf( | |
1907 | buf + len, buflen - len, | |
1908 | "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n" | |
1909 | "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n" | |
1910 | "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n" | |
1911 | "dot11RSNAPMKIDUsed=%s\n" | |
1912 | "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n" | |
1913 | "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n" | |
1914 | "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n" | |
1915 | "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n" | |
1916 | "dot11RSNA4WayHandshakeFailures=%u\n", | |
1917 | RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)), | |
c3550295 JM |
1918 | RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, |
1919 | sm->pairwise_cipher)), | |
1920 | RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, | |
1921 | sm->group_cipher)), | |
6fc6879b JM |
1922 | pmkid_txt, |
1923 | RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)), | |
c3550295 JM |
1924 | RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, |
1925 | sm->pairwise_cipher)), | |
1926 | RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, | |
1927 | sm->group_cipher)), | |
6fc6879b JM |
1928 | sm->dot11RSNA4WayHandshakeFailures); |
1929 | if (ret >= 0 && (size_t) ret < buflen) | |
1930 | len += ret; | |
1931 | ||
1932 | return (int) len; | |
1933 | } | |
1934 | #endif /* CONFIG_CTRL_IFACE */ | |
1935 | ||
1936 | ||
1937 | static void wpa_sm_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry, | |
6aaac006 | 1938 | void *ctx, enum pmksa_free_reason reason) |
6fc6879b JM |
1939 | { |
1940 | struct wpa_sm *sm = ctx; | |
6aaac006 | 1941 | int deauth = 0; |
6fc6879b | 1942 | |
6aaac006 DW |
1943 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: PMKSA cache entry free_cb: " |
1944 | MACSTR " reason=%d", MAC2STR(entry->aa), reason); | |
1945 | ||
1946 | if (sm->cur_pmksa == entry) { | |
1947 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
1948 | "RSN: %s current PMKSA entry", | |
1949 | reason == PMKSA_REPLACE ? "replaced" : "removed"); | |
1950 | pmksa_cache_clear_current(sm); | |
1951 | ||
1952 | /* | |
1953 | * If an entry is simply being replaced, there's no need to | |
1954 | * deauthenticate because it will be immediately re-added. | |
1955 | * This happens when EAP authentication is completed again | |
1956 | * (reauth or failed PMKSA caching attempt). | |
1957 | */ | |
1958 | if (reason != PMKSA_REPLACE) | |
1959 | deauth = 1; | |
1960 | } | |
1961 | ||
1962 | if (reason == PMKSA_EXPIRE && | |
6fc6879b JM |
1963 | (sm->pmk_len == entry->pmk_len && |
1964 | os_memcmp(sm->pmk, entry->pmk, sm->pmk_len) == 0)) { | |
f049052b | 1965 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
6aaac006 DW |
1966 | "RSN: deauthenticating due to expired PMK"); |
1967 | pmksa_cache_clear_current(sm); | |
1968 | deauth = 1; | |
1969 | } | |
6fc6879b | 1970 | |
6aaac006 | 1971 | if (deauth) { |
6fc6879b JM |
1972 | os_memset(sm->pmk, 0, sizeof(sm->pmk)); |
1973 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); | |
6fc6879b JM |
1974 | } |
1975 | } | |
1976 | ||
1977 | ||
1978 | /** | |
1979 | * wpa_sm_init - Initialize WPA state machine | |
1980 | * @ctx: Context pointer for callbacks; this needs to be an allocated buffer | |
1981 | * Returns: Pointer to the allocated WPA state machine data | |
1982 | * | |
1983 | * This function is used to allocate a new WPA state machine and the returned | |
1984 | * value is passed to all WPA state machine calls. | |
1985 | */ | |
1986 | struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx) | |
1987 | { | |
1988 | struct wpa_sm *sm; | |
1989 | ||
1990 | sm = os_zalloc(sizeof(*sm)); | |
1991 | if (sm == NULL) | |
1992 | return NULL; | |
c5b26e33 | 1993 | dl_list_init(&sm->pmksa_candidates); |
6fc6879b JM |
1994 | sm->renew_snonce = 1; |
1995 | sm->ctx = ctx; | |
1996 | ||
1997 | sm->dot11RSNAConfigPMKLifetime = 43200; | |
1998 | sm->dot11RSNAConfigPMKReauthThreshold = 70; | |
1999 | sm->dot11RSNAConfigSATimeout = 60; | |
2000 | ||
2001 | sm->pmksa = pmksa_cache_init(wpa_sm_pmksa_free_cb, sm, sm); | |
2002 | if (sm->pmksa == NULL) { | |
f049052b BG |
2003 | wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, |
2004 | "RSN: PMKSA cache initialization failed"); | |
6fc6879b JM |
2005 | os_free(sm); |
2006 | return NULL; | |
2007 | } | |
2008 | ||
2009 | return sm; | |
2010 | } | |
2011 | ||
2012 | ||
2013 | /** | |
2014 | * wpa_sm_deinit - Deinitialize WPA state machine | |
2015 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2016 | */ | |
2017 | void wpa_sm_deinit(struct wpa_sm *sm) | |
2018 | { | |
2019 | if (sm == NULL) | |
2020 | return; | |
2021 | pmksa_cache_deinit(sm->pmksa); | |
2022 | eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL); | |
581a8cde | 2023 | eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); |
6fc6879b JM |
2024 | os_free(sm->assoc_wpa_ie); |
2025 | os_free(sm->ap_wpa_ie); | |
2026 | os_free(sm->ap_rsn_ie); | |
2027 | os_free(sm->ctx); | |
2028 | peerkey_deinit(sm); | |
55046414 JM |
2029 | #ifdef CONFIG_IEEE80211R |
2030 | os_free(sm->assoc_resp_ies); | |
2031 | #endif /* CONFIG_IEEE80211R */ | |
6fc6879b JM |
2032 | os_free(sm); |
2033 | } | |
2034 | ||
2035 | ||
2036 | /** | |
2037 | * wpa_sm_notify_assoc - Notify WPA state machine about association | |
2038 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2039 | * @bssid: The BSSID of the new association | |
2040 | * | |
2041 | * This function is called to let WPA state machine know that the connection | |
2042 | * was established. | |
2043 | */ | |
2044 | void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid) | |
2045 | { | |
58a98fb0 JM |
2046 | int clear_ptk = 1; |
2047 | ||
6fc6879b JM |
2048 | if (sm == NULL) |
2049 | return; | |
2050 | ||
f049052b BG |
2051 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2052 | "WPA: Association event - clear replay counter"); | |
6fc6879b JM |
2053 | os_memcpy(sm->bssid, bssid, ETH_ALEN); |
2054 | os_memset(sm->rx_replay_counter, 0, WPA_REPLAY_COUNTER_LEN); | |
2055 | sm->rx_replay_counter_set = 0; | |
2056 | sm->renew_snonce = 1; | |
2057 | if (os_memcmp(sm->preauth_bssid, bssid, ETH_ALEN) == 0) | |
2058 | rsn_preauth_deinit(sm); | |
2059 | ||
2060 | #ifdef CONFIG_IEEE80211R | |
58a98fb0 | 2061 | if (wpa_ft_is_completed(sm)) { |
5d5a9f00 JM |
2062 | /* |
2063 | * Clear portValid to kick EAPOL state machine to re-enter | |
2064 | * AUTHENTICATED state to get the EAPOL port Authorized. | |
2065 | */ | |
2066 | eapol_sm_notify_portValid(sm->eapol, FALSE); | |
6fc6879b JM |
2067 | wpa_supplicant_key_neg_complete(sm, sm->bssid, 1); |
2068 | ||
2069 | /* Prepare for the next transition */ | |
76b7981d | 2070 | wpa_ft_prepare_auth_request(sm, NULL); |
58a98fb0 JM |
2071 | |
2072 | clear_ptk = 0; | |
6fc6879b JM |
2073 | } |
2074 | #endif /* CONFIG_IEEE80211R */ | |
58a98fb0 JM |
2075 | |
2076 | if (clear_ptk) { | |
2077 | /* | |
2078 | * IEEE 802.11, 8.4.10: Delete PTK SA on (re)association if | |
2079 | * this is not part of a Fast BSS Transition. | |
2080 | */ | |
f049052b | 2081 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PTK"); |
58a98fb0 JM |
2082 | sm->ptk_set = 0; |
2083 | sm->tptk_set = 0; | |
2084 | } | |
40cf22e6 JM |
2085 | |
2086 | #ifdef CONFIG_TDLS | |
2087 | wpa_tdls_assoc(sm); | |
2088 | #endif /* CONFIG_TDLS */ | |
6fc6879b JM |
2089 | } |
2090 | ||
2091 | ||
2092 | /** | |
2093 | * wpa_sm_notify_disassoc - Notify WPA state machine about disassociation | |
2094 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2095 | * | |
2096 | * This function is called to let WPA state machine know that the connection | |
2097 | * was lost. This will abort any existing pre-authentication session. | |
2098 | */ | |
2099 | void wpa_sm_notify_disassoc(struct wpa_sm *sm) | |
2100 | { | |
77327298 | 2101 | peerkey_deinit(sm); |
6fc6879b | 2102 | rsn_preauth_deinit(sm); |
0639970d | 2103 | pmksa_cache_clear_current(sm); |
6fc6879b JM |
2104 | if (wpa_sm_get_state(sm) == WPA_4WAY_HANDSHAKE) |
2105 | sm->dot11RSNA4WayHandshakeFailures++; | |
40cf22e6 JM |
2106 | #ifdef CONFIG_TDLS |
2107 | wpa_tdls_disassoc(sm); | |
2108 | #endif /* CONFIG_TDLS */ | |
6fc6879b JM |
2109 | } |
2110 | ||
2111 | ||
2112 | /** | |
2113 | * wpa_sm_set_pmk - Set PMK | |
2114 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2115 | * @pmk: The new PMK | |
2116 | * @pmk_len: The length of the new PMK in bytes | |
2117 | * | |
2118 | * Configure the PMK for WPA state machine. | |
2119 | */ | |
2120 | void wpa_sm_set_pmk(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len) | |
2121 | { | |
2122 | if (sm == NULL) | |
2123 | return; | |
2124 | ||
2125 | sm->pmk_len = pmk_len; | |
2126 | os_memcpy(sm->pmk, pmk, pmk_len); | |
2127 | ||
2128 | #ifdef CONFIG_IEEE80211R | |
2129 | /* Set XXKey to be PSK for FT key derivation */ | |
2130 | sm->xxkey_len = pmk_len; | |
2131 | os_memcpy(sm->xxkey, pmk, pmk_len); | |
2132 | #endif /* CONFIG_IEEE80211R */ | |
2133 | } | |
2134 | ||
2135 | ||
2136 | /** | |
2137 | * wpa_sm_set_pmk_from_pmksa - Set PMK based on the current PMKSA | |
2138 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2139 | * | |
2140 | * Take the PMK from the current PMKSA into use. If no PMKSA is active, the PMK | |
2141 | * will be cleared. | |
2142 | */ | |
2143 | void wpa_sm_set_pmk_from_pmksa(struct wpa_sm *sm) | |
2144 | { | |
2145 | if (sm == NULL) | |
2146 | return; | |
2147 | ||
2148 | if (sm->cur_pmksa) { | |
2149 | sm->pmk_len = sm->cur_pmksa->pmk_len; | |
2150 | os_memcpy(sm->pmk, sm->cur_pmksa->pmk, sm->pmk_len); | |
2151 | } else { | |
2152 | sm->pmk_len = PMK_LEN; | |
2153 | os_memset(sm->pmk, 0, PMK_LEN); | |
2154 | } | |
2155 | } | |
2156 | ||
2157 | ||
2158 | /** | |
2159 | * wpa_sm_set_fast_reauth - Set fast reauthentication (EAP) enabled/disabled | |
2160 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2161 | * @fast_reauth: Whether fast reauthentication (EAP) is allowed | |
2162 | */ | |
2163 | void wpa_sm_set_fast_reauth(struct wpa_sm *sm, int fast_reauth) | |
2164 | { | |
2165 | if (sm) | |
2166 | sm->fast_reauth = fast_reauth; | |
2167 | } | |
2168 | ||
2169 | ||
2170 | /** | |
2171 | * wpa_sm_set_scard_ctx - Set context pointer for smartcard callbacks | |
2172 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2173 | * @scard_ctx: Context pointer for smartcard related callback functions | |
2174 | */ | |
2175 | void wpa_sm_set_scard_ctx(struct wpa_sm *sm, void *scard_ctx) | |
2176 | { | |
2177 | if (sm == NULL) | |
2178 | return; | |
2179 | sm->scard_ctx = scard_ctx; | |
2180 | if (sm->preauth_eapol) | |
2181 | eapol_sm_register_scard_ctx(sm->preauth_eapol, scard_ctx); | |
2182 | } | |
2183 | ||
2184 | ||
2185 | /** | |
2186 | * wpa_sm_set_config - Notification of current configration change | |
2187 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2188 | * @config: Pointer to current network configuration | |
2189 | * | |
2190 | * Notify WPA state machine that configuration has changed. config will be | |
2191 | * stored as a backpointer to network configuration. This can be %NULL to clear | |
2192 | * the stored pointed. | |
2193 | */ | |
2194 | void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config) | |
2195 | { | |
2196 | if (!sm) | |
2197 | return; | |
2198 | ||
6fc6879b | 2199 | if (config) { |
886a807f | 2200 | sm->network_ctx = config->network_ctx; |
6fc6879b JM |
2201 | sm->peerkey_enabled = config->peerkey_enabled; |
2202 | sm->allowed_pairwise_cipher = config->allowed_pairwise_cipher; | |
2203 | sm->proactive_key_caching = config->proactive_key_caching; | |
2204 | sm->eap_workaround = config->eap_workaround; | |
2205 | sm->eap_conf_ctx = config->eap_conf_ctx; | |
2206 | if (config->ssid) { | |
2207 | os_memcpy(sm->ssid, config->ssid, config->ssid_len); | |
2208 | sm->ssid_len = config->ssid_len; | |
2209 | } else | |
2210 | sm->ssid_len = 0; | |
581a8cde | 2211 | sm->wpa_ptk_rekey = config->wpa_ptk_rekey; |
6fc6879b | 2212 | } else { |
886a807f | 2213 | sm->network_ctx = NULL; |
6fc6879b JM |
2214 | sm->peerkey_enabled = 0; |
2215 | sm->allowed_pairwise_cipher = 0; | |
2216 | sm->proactive_key_caching = 0; | |
2217 | sm->eap_workaround = 0; | |
2218 | sm->eap_conf_ctx = NULL; | |
2219 | sm->ssid_len = 0; | |
581a8cde | 2220 | sm->wpa_ptk_rekey = 0; |
6fc6879b | 2221 | } |
6fc6879b JM |
2222 | } |
2223 | ||
2224 | ||
2225 | /** | |
2226 | * wpa_sm_set_own_addr - Set own MAC address | |
2227 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2228 | * @addr: Own MAC address | |
2229 | */ | |
2230 | void wpa_sm_set_own_addr(struct wpa_sm *sm, const u8 *addr) | |
2231 | { | |
2232 | if (sm) | |
2233 | os_memcpy(sm->own_addr, addr, ETH_ALEN); | |
2234 | } | |
2235 | ||
2236 | ||
2237 | /** | |
2238 | * wpa_sm_set_ifname - Set network interface name | |
2239 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2240 | * @ifname: Interface name | |
2241 | * @bridge_ifname: Optional bridge interface name (for pre-auth) | |
2242 | */ | |
2243 | void wpa_sm_set_ifname(struct wpa_sm *sm, const char *ifname, | |
2244 | const char *bridge_ifname) | |
2245 | { | |
2246 | if (sm) { | |
2247 | sm->ifname = ifname; | |
2248 | sm->bridge_ifname = bridge_ifname; | |
2249 | } | |
2250 | } | |
2251 | ||
2252 | ||
2253 | /** | |
2254 | * wpa_sm_set_eapol - Set EAPOL state machine pointer | |
2255 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2256 | * @eapol: Pointer to EAPOL state machine allocated with eapol_sm_init() | |
2257 | */ | |
2258 | void wpa_sm_set_eapol(struct wpa_sm *sm, struct eapol_sm *eapol) | |
2259 | { | |
2260 | if (sm) | |
2261 | sm->eapol = eapol; | |
2262 | } | |
2263 | ||
2264 | ||
2265 | /** | |
2266 | * wpa_sm_set_param - Set WPA state machine parameters | |
2267 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2268 | * @param: Parameter field | |
2269 | * @value: Parameter value | |
2270 | * Returns: 0 on success, -1 on failure | |
2271 | */ | |
2272 | int wpa_sm_set_param(struct wpa_sm *sm, enum wpa_sm_conf_params param, | |
2273 | unsigned int value) | |
2274 | { | |
2275 | int ret = 0; | |
2276 | ||
2277 | if (sm == NULL) | |
2278 | return -1; | |
2279 | ||
2280 | switch (param) { | |
2281 | case RSNA_PMK_LIFETIME: | |
2282 | if (value > 0) | |
2283 | sm->dot11RSNAConfigPMKLifetime = value; | |
2284 | else | |
2285 | ret = -1; | |
2286 | break; | |
2287 | case RSNA_PMK_REAUTH_THRESHOLD: | |
2288 | if (value > 0 && value <= 100) | |
2289 | sm->dot11RSNAConfigPMKReauthThreshold = value; | |
2290 | else | |
2291 | ret = -1; | |
2292 | break; | |
2293 | case RSNA_SA_TIMEOUT: | |
2294 | if (value > 0) | |
2295 | sm->dot11RSNAConfigSATimeout = value; | |
2296 | else | |
2297 | ret = -1; | |
2298 | break; | |
2299 | case WPA_PARAM_PROTO: | |
2300 | sm->proto = value; | |
2301 | break; | |
2302 | case WPA_PARAM_PAIRWISE: | |
2303 | sm->pairwise_cipher = value; | |
2304 | break; | |
2305 | case WPA_PARAM_GROUP: | |
2306 | sm->group_cipher = value; | |
2307 | break; | |
2308 | case WPA_PARAM_KEY_MGMT: | |
2309 | sm->key_mgmt = value; | |
2310 | break; | |
2311 | #ifdef CONFIG_IEEE80211W | |
2312 | case WPA_PARAM_MGMT_GROUP: | |
2313 | sm->mgmt_group_cipher = value; | |
2314 | break; | |
2315 | #endif /* CONFIG_IEEE80211W */ | |
2316 | case WPA_PARAM_RSN_ENABLED: | |
2317 | sm->rsn_enabled = value; | |
2318 | break; | |
e820cf95 JM |
2319 | case WPA_PARAM_MFP: |
2320 | sm->mfp = value; | |
2321 | break; | |
6fc6879b JM |
2322 | default: |
2323 | break; | |
2324 | } | |
2325 | ||
2326 | return ret; | |
2327 | } | |
2328 | ||
2329 | ||
2330 | /** | |
2331 | * wpa_sm_get_param - Get WPA state machine parameters | |
2332 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2333 | * @param: Parameter field | |
2334 | * Returns: Parameter value | |
2335 | */ | |
2336 | unsigned int wpa_sm_get_param(struct wpa_sm *sm, enum wpa_sm_conf_params param) | |
2337 | { | |
2338 | if (sm == NULL) | |
2339 | return 0; | |
2340 | ||
2341 | switch (param) { | |
2342 | case RSNA_PMK_LIFETIME: | |
2343 | return sm->dot11RSNAConfigPMKLifetime; | |
2344 | case RSNA_PMK_REAUTH_THRESHOLD: | |
2345 | return sm->dot11RSNAConfigPMKReauthThreshold; | |
2346 | case RSNA_SA_TIMEOUT: | |
2347 | return sm->dot11RSNAConfigSATimeout; | |
2348 | case WPA_PARAM_PROTO: | |
2349 | return sm->proto; | |
2350 | case WPA_PARAM_PAIRWISE: | |
2351 | return sm->pairwise_cipher; | |
2352 | case WPA_PARAM_GROUP: | |
2353 | return sm->group_cipher; | |
2354 | case WPA_PARAM_KEY_MGMT: | |
2355 | return sm->key_mgmt; | |
2356 | #ifdef CONFIG_IEEE80211W | |
2357 | case WPA_PARAM_MGMT_GROUP: | |
2358 | return sm->mgmt_group_cipher; | |
2359 | #endif /* CONFIG_IEEE80211W */ | |
2360 | case WPA_PARAM_RSN_ENABLED: | |
2361 | return sm->rsn_enabled; | |
2362 | default: | |
2363 | return 0; | |
2364 | } | |
2365 | } | |
2366 | ||
2367 | ||
2368 | /** | |
2369 | * wpa_sm_get_status - Get WPA state machine | |
2370 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2371 | * @buf: Buffer for status information | |
2372 | * @buflen: Maximum buffer length | |
2373 | * @verbose: Whether to include verbose status information | |
2374 | * Returns: Number of bytes written to buf. | |
2375 | * | |
2376 | * Query WPA state machine for status information. This function fills in | |
2377 | * a text area with current status information. If the buffer (buf) is not | |
2378 | * large enough, status information will be truncated to fit the buffer. | |
2379 | */ | |
2380 | int wpa_sm_get_status(struct wpa_sm *sm, char *buf, size_t buflen, | |
2381 | int verbose) | |
2382 | { | |
2383 | char *pos = buf, *end = buf + buflen; | |
2384 | int ret; | |
2385 | ||
2386 | ret = os_snprintf(pos, end - pos, | |
2387 | "pairwise_cipher=%s\n" | |
2388 | "group_cipher=%s\n" | |
2389 | "key_mgmt=%s\n", | |
2390 | wpa_cipher_txt(sm->pairwise_cipher), | |
2391 | wpa_cipher_txt(sm->group_cipher), | |
2392 | wpa_key_mgmt_txt(sm->key_mgmt, sm->proto)); | |
2393 | if (ret < 0 || ret >= end - pos) | |
2394 | return pos - buf; | |
2395 | pos += ret; | |
13e1d2e2 JM |
2396 | |
2397 | if (sm->mfp != NO_MGMT_FRAME_PROTECTION && sm->ap_rsn_ie) { | |
2398 | struct wpa_ie_data rsn; | |
2399 | if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) | |
2400 | >= 0 && | |
2401 | rsn.capabilities & (WPA_CAPABILITY_MFPR | | |
2402 | WPA_CAPABILITY_MFPC)) { | |
2403 | ret = os_snprintf(pos, end - pos, "pmf=%d\n", | |
2404 | (rsn.capabilities & | |
2405 | WPA_CAPABILITY_MFPR) ? 2 : 1); | |
2406 | if (ret < 0 || ret >= end - pos) | |
2407 | return pos - buf; | |
2408 | pos += ret; | |
2409 | } | |
2410 | } | |
2411 | ||
6fc6879b JM |
2412 | return pos - buf; |
2413 | } | |
2414 | ||
2415 | ||
ae8535b6 JM |
2416 | int wpa_sm_pmf_enabled(struct wpa_sm *sm) |
2417 | { | |
2418 | struct wpa_ie_data rsn; | |
2419 | ||
2420 | if (sm->mfp == NO_MGMT_FRAME_PROTECTION || !sm->ap_rsn_ie) | |
2421 | return 0; | |
2422 | ||
2423 | if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) >= 0 && | |
2424 | rsn.capabilities & (WPA_CAPABILITY_MFPR | WPA_CAPABILITY_MFPC)) | |
2425 | return 1; | |
2426 | ||
2427 | return 0; | |
2428 | } | |
2429 | ||
2430 | ||
6fc6879b JM |
2431 | /** |
2432 | * wpa_sm_set_assoc_wpa_ie_default - Generate own WPA/RSN IE from configuration | |
2433 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2434 | * @wpa_ie: Pointer to buffer for WPA/RSN IE | |
2435 | * @wpa_ie_len: Pointer to the length of the wpa_ie buffer | |
2436 | * Returns: 0 on success, -1 on failure | |
2437 | */ | |
2438 | int wpa_sm_set_assoc_wpa_ie_default(struct wpa_sm *sm, u8 *wpa_ie, | |
2439 | size_t *wpa_ie_len) | |
2440 | { | |
2441 | int res; | |
2442 | ||
2443 | if (sm == NULL) | |
2444 | return -1; | |
2445 | ||
2446 | res = wpa_gen_wpa_ie(sm, wpa_ie, *wpa_ie_len); | |
2447 | if (res < 0) | |
2448 | return -1; | |
2449 | *wpa_ie_len = res; | |
2450 | ||
2451 | wpa_hexdump(MSG_DEBUG, "WPA: Set own WPA IE default", | |
2452 | wpa_ie, *wpa_ie_len); | |
2453 | ||
2454 | if (sm->assoc_wpa_ie == NULL) { | |
2455 | /* | |
2456 | * Make a copy of the WPA/RSN IE so that 4-Way Handshake gets | |
2457 | * the correct version of the IE even if PMKSA caching is | |
2458 | * aborted (which would remove PMKID from IE generation). | |
2459 | */ | |
2460 | sm->assoc_wpa_ie = os_malloc(*wpa_ie_len); | |
2461 | if (sm->assoc_wpa_ie == NULL) | |
2462 | return -1; | |
2463 | ||
2464 | os_memcpy(sm->assoc_wpa_ie, wpa_ie, *wpa_ie_len); | |
2465 | sm->assoc_wpa_ie_len = *wpa_ie_len; | |
2466 | } | |
2467 | ||
2468 | return 0; | |
2469 | } | |
2470 | ||
2471 | ||
2472 | /** | |
2473 | * wpa_sm_set_assoc_wpa_ie - Set own WPA/RSN IE from (Re)AssocReq | |
2474 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2475 | * @ie: Pointer to IE data (starting from id) | |
2476 | * @len: IE length | |
2477 | * Returns: 0 on success, -1 on failure | |
2478 | * | |
2479 | * Inform WPA state machine about the WPA/RSN IE used in (Re)Association | |
2480 | * Request frame. The IE will be used to override the default value generated | |
2481 | * with wpa_sm_set_assoc_wpa_ie_default(). | |
2482 | */ | |
2483 | int wpa_sm_set_assoc_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len) | |
2484 | { | |
2485 | if (sm == NULL) | |
2486 | return -1; | |
2487 | ||
2488 | os_free(sm->assoc_wpa_ie); | |
2489 | if (ie == NULL || len == 0) { | |
f049052b BG |
2490 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2491 | "WPA: clearing own WPA/RSN IE"); | |
6fc6879b JM |
2492 | sm->assoc_wpa_ie = NULL; |
2493 | sm->assoc_wpa_ie_len = 0; | |
2494 | } else { | |
2495 | wpa_hexdump(MSG_DEBUG, "WPA: set own WPA/RSN IE", ie, len); | |
2496 | sm->assoc_wpa_ie = os_malloc(len); | |
2497 | if (sm->assoc_wpa_ie == NULL) | |
2498 | return -1; | |
2499 | ||
2500 | os_memcpy(sm->assoc_wpa_ie, ie, len); | |
2501 | sm->assoc_wpa_ie_len = len; | |
2502 | } | |
2503 | ||
2504 | return 0; | |
2505 | } | |
2506 | ||
2507 | ||
2508 | /** | |
2509 | * wpa_sm_set_ap_wpa_ie - Set AP WPA IE from Beacon/ProbeResp | |
2510 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2511 | * @ie: Pointer to IE data (starting from id) | |
2512 | * @len: IE length | |
2513 | * Returns: 0 on success, -1 on failure | |
2514 | * | |
2515 | * Inform WPA state machine about the WPA IE used in Beacon / Probe Response | |
2516 | * frame. | |
2517 | */ | |
2518 | int wpa_sm_set_ap_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len) | |
2519 | { | |
2520 | if (sm == NULL) | |
2521 | return -1; | |
2522 | ||
2523 | os_free(sm->ap_wpa_ie); | |
2524 | if (ie == NULL || len == 0) { | |
f049052b BG |
2525 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2526 | "WPA: clearing AP WPA IE"); | |
6fc6879b JM |
2527 | sm->ap_wpa_ie = NULL; |
2528 | sm->ap_wpa_ie_len = 0; | |
2529 | } else { | |
2530 | wpa_hexdump(MSG_DEBUG, "WPA: set AP WPA IE", ie, len); | |
2531 | sm->ap_wpa_ie = os_malloc(len); | |
2532 | if (sm->ap_wpa_ie == NULL) | |
2533 | return -1; | |
2534 | ||
2535 | os_memcpy(sm->ap_wpa_ie, ie, len); | |
2536 | sm->ap_wpa_ie_len = len; | |
2537 | } | |
2538 | ||
2539 | return 0; | |
2540 | } | |
2541 | ||
2542 | ||
2543 | /** | |
2544 | * wpa_sm_set_ap_rsn_ie - Set AP RSN IE from Beacon/ProbeResp | |
2545 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2546 | * @ie: Pointer to IE data (starting from id) | |
2547 | * @len: IE length | |
2548 | * Returns: 0 on success, -1 on failure | |
2549 | * | |
2550 | * Inform WPA state machine about the RSN IE used in Beacon / Probe Response | |
2551 | * frame. | |
2552 | */ | |
2553 | int wpa_sm_set_ap_rsn_ie(struct wpa_sm *sm, const u8 *ie, size_t len) | |
2554 | { | |
2555 | if (sm == NULL) | |
2556 | return -1; | |
2557 | ||
2558 | os_free(sm->ap_rsn_ie); | |
2559 | if (ie == NULL || len == 0) { | |
f049052b BG |
2560 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2561 | "WPA: clearing AP RSN IE"); | |
6fc6879b JM |
2562 | sm->ap_rsn_ie = NULL; |
2563 | sm->ap_rsn_ie_len = 0; | |
2564 | } else { | |
2565 | wpa_hexdump(MSG_DEBUG, "WPA: set AP RSN IE", ie, len); | |
2566 | sm->ap_rsn_ie = os_malloc(len); | |
2567 | if (sm->ap_rsn_ie == NULL) | |
2568 | return -1; | |
2569 | ||
2570 | os_memcpy(sm->ap_rsn_ie, ie, len); | |
2571 | sm->ap_rsn_ie_len = len; | |
2572 | } | |
2573 | ||
2574 | return 0; | |
2575 | } | |
2576 | ||
2577 | ||
2578 | /** | |
2579 | * wpa_sm_parse_own_wpa_ie - Parse own WPA/RSN IE | |
2580 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2581 | * @data: Pointer to data area for parsing results | |
2582 | * Returns: 0 on success, -1 if IE is not known, or -2 on parsing failure | |
2583 | * | |
2584 | * Parse the contents of the own WPA or RSN IE from (Re)AssocReq and write the | |
2585 | * parsed data into data. | |
2586 | */ | |
2587 | int wpa_sm_parse_own_wpa_ie(struct wpa_sm *sm, struct wpa_ie_data *data) | |
2588 | { | |
2a522e71 JM |
2589 | if (sm == NULL) |
2590 | return -1; | |
2591 | ||
2592 | if (sm->assoc_wpa_ie == NULL) { | |
f049052b BG |
2593 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2594 | "WPA: No WPA/RSN IE available from association info"); | |
6fc6879b JM |
2595 | return -1; |
2596 | } | |
2597 | if (wpa_parse_wpa_ie(sm->assoc_wpa_ie, sm->assoc_wpa_ie_len, data)) | |
2598 | return -2; | |
2599 | return 0; | |
2600 | } | |
540264a7 JM |
2601 | |
2602 | ||
2603 | int wpa_sm_pmksa_cache_list(struct wpa_sm *sm, char *buf, size_t len) | |
2604 | { | |
540264a7 | 2605 | return pmksa_cache_list(sm->pmksa, buf, len); |
540264a7 | 2606 | } |
32d5295f JM |
2607 | |
2608 | ||
2609 | void wpa_sm_drop_sa(struct wpa_sm *sm) | |
2610 | { | |
f049052b | 2611 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PMK and PTK"); |
32d5295f JM |
2612 | sm->ptk_set = 0; |
2613 | sm->tptk_set = 0; | |
2614 | os_memset(sm->pmk, 0, sizeof(sm->pmk)); | |
2615 | os_memset(&sm->ptk, 0, sizeof(sm->ptk)); | |
2616 | os_memset(&sm->tptk, 0, sizeof(sm->tptk)); | |
2617 | } | |
0d7b4409 JM |
2618 | |
2619 | ||
2620 | int wpa_sm_has_ptk(struct wpa_sm *sm) | |
2621 | { | |
2622 | if (sm == NULL) | |
2623 | return 0; | |
2624 | return sm->ptk_set; | |
2625 | } | |
b14a210c JB |
2626 | |
2627 | ||
2628 | void wpa_sm_update_replay_ctr(struct wpa_sm *sm, const u8 *replay_ctr) | |
2629 | { | |
2630 | os_memcpy(sm->rx_replay_counter, replay_ctr, WPA_REPLAY_COUNTER_LEN); | |
2631 | } | |
d8a790b9 JM |
2632 | |
2633 | ||
2634 | void wpa_sm_pmksa_cache_flush(struct wpa_sm *sm, void *network_ctx) | |
2635 | { | |
4033935d | 2636 | pmksa_cache_flush(sm->pmksa, network_ctx, NULL, 0); |
d8a790b9 | 2637 | } |
75cad1a0 XC |
2638 | |
2639 | ||
ad3872a3 | 2640 | #ifdef CONFIG_WNM |
75cad1a0 XC |
2641 | int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 subelem_id, u8 *buf) |
2642 | { | |
2643 | struct wpa_gtk_data gd; | |
2644 | #ifdef CONFIG_IEEE80211W | |
2645 | struct wpa_igtk_kde igd; | |
2646 | u16 keyidx; | |
2647 | #endif /* CONFIG_IEEE80211W */ | |
2648 | u16 keyinfo; | |
2649 | u8 keylen; /* plaintext key len */ | |
75cad1a0 XC |
2650 | u8 *key_rsc; |
2651 | ||
2652 | os_memset(&gd, 0, sizeof(gd)); | |
2653 | #ifdef CONFIG_IEEE80211W | |
2654 | os_memset(&igd, 0, sizeof(igd)); | |
2655 | #endif /* CONFIG_IEEE80211W */ | |
2656 | ||
c3550295 JM |
2657 | keylen = wpa_cipher_key_len(sm->group_cipher); |
2658 | gd.key_rsc_len = wpa_cipher_rsc_len(sm->group_cipher); | |
2659 | gd.alg = wpa_cipher_to_alg(sm->group_cipher); | |
2660 | if (gd.alg == WPA_ALG_NONE) { | |
75cad1a0 XC |
2661 | wpa_printf(MSG_DEBUG, "Unsupported group cipher suite"); |
2662 | return -1; | |
2663 | } | |
2664 | ||
2665 | if (subelem_id == WNM_SLEEP_SUBELEM_GTK) { | |
2666 | key_rsc = buf + 5; | |
68db9ab0 | 2667 | keyinfo = WPA_GET_LE16(buf + 2); |
75cad1a0 XC |
2668 | gd.gtk_len = keylen; |
2669 | if (gd.gtk_len != buf[4]) { | |
2670 | wpa_printf(MSG_DEBUG, "GTK len mismatch len %d vs %d", | |
2671 | gd.gtk_len, buf[4]); | |
2672 | return -1; | |
2673 | } | |
2674 | gd.keyidx = keyinfo & 0x03; /* B0 - B1 */ | |
2675 | gd.tx = wpa_supplicant_gtk_tx_bit_workaround( | |
2676 | sm, !!(keyinfo & WPA_KEY_INFO_TXRX)); | |
2677 | ||
68db9ab0 | 2678 | os_memcpy(gd.gtk, buf + 13, gd.gtk_len); |
75cad1a0 XC |
2679 | |
2680 | wpa_hexdump_key(MSG_DEBUG, "Install GTK (WNM SLEEP)", | |
2681 | gd.gtk, gd.gtk_len); | |
2682 | if (wpa_supplicant_install_gtk(sm, &gd, key_rsc)) { | |
2683 | wpa_printf(MSG_DEBUG, "Failed to install the GTK in " | |
2684 | "WNM mode"); | |
2685 | return -1; | |
2686 | } | |
2687 | #ifdef CONFIG_IEEE80211W | |
2688 | } else if (subelem_id == WNM_SLEEP_SUBELEM_IGTK) { | |
75cad1a0 XC |
2689 | os_memcpy(igd.keyid, buf + 2, 2); |
2690 | os_memcpy(igd.pn, buf + 4, 6); | |
2691 | ||
2692 | keyidx = WPA_GET_LE16(igd.keyid); | |
68db9ab0 | 2693 | os_memcpy(igd.igtk, buf + 10, WPA_IGTK_LEN); |
75cad1a0 XC |
2694 | |
2695 | wpa_hexdump_key(MSG_DEBUG, "Install IGTK (WNM SLEEP)", | |
2696 | igd.igtk, WPA_IGTK_LEN); | |
2697 | if (wpa_sm_set_key(sm, WPA_ALG_IGTK, broadcast_ether_addr, | |
2698 | keyidx, 0, igd.pn, sizeof(igd.pn), | |
2699 | igd.igtk, WPA_IGTK_LEN) < 0) { | |
2700 | wpa_printf(MSG_DEBUG, "Failed to install the IGTK in " | |
2701 | "WNM mode"); | |
2702 | return -1; | |
2703 | } | |
2704 | #endif /* CONFIG_IEEE80211W */ | |
2705 | } else { | |
2706 | wpa_printf(MSG_DEBUG, "Unknown element id"); | |
2707 | return -1; | |
2708 | } | |
2709 | ||
2710 | return 0; | |
2711 | } | |
ad3872a3 | 2712 | #endif /* CONFIG_WNM */ |