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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 | ||
395 | #ifndef CONFIG_NO_WPA2 | |
396 | if (sm->proto == WPA_PROTO_RSN) { | |
397 | /* RSN: msg 1/4 should contain PMKID for the selected PMK */ | |
398 | const u8 *_buf = (const u8 *) (key + 1); | |
399 | size_t len = WPA_GET_BE16(key->key_data_length); | |
400 | wpa_hexdump(MSG_DEBUG, "RSN: msg 1/4 key data", _buf, len); | |
d627a939 JM |
401 | if (wpa_supplicant_parse_ies(_buf, len, &ie) < 0) |
402 | goto failed; | |
6fc6879b JM |
403 | if (ie.pmkid) { |
404 | wpa_hexdump(MSG_DEBUG, "RSN: PMKID from " | |
405 | "Authenticator", ie.pmkid, PMKID_LEN); | |
406 | } | |
407 | } | |
408 | #endif /* CONFIG_NO_WPA2 */ | |
409 | ||
b4a1256d JM |
410 | res = wpa_supplicant_get_pmk(sm, src_addr, ie.pmkid); |
411 | if (res == -2) { | |
f049052b BG |
412 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: Do not reply to " |
413 | "msg 1/4 - requesting full EAP authentication"); | |
b4a1256d JM |
414 | return; |
415 | } | |
416 | if (res) | |
83935317 | 417 | goto failed; |
6fc6879b JM |
418 | |
419 | if (sm->renew_snonce) { | |
3642c431 | 420 | if (random_get_bytes(sm->snonce, WPA_NONCE_LEN)) { |
0f057fb2 | 421 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
6fc6879b | 422 | "WPA: Failed to get random data for SNonce"); |
83935317 | 423 | goto failed; |
6fc6879b JM |
424 | } |
425 | sm->renew_snonce = 0; | |
426 | wpa_hexdump(MSG_DEBUG, "WPA: Renewed SNonce", | |
427 | sm->snonce, WPA_NONCE_LEN); | |
428 | } | |
429 | ||
430 | /* Calculate PTK which will be stored as a temporary PTK until it has | |
431 | * been verified when processing message 3/4. */ | |
432 | ptk = &sm->tptk; | |
433 | wpa_derive_ptk(sm, src_addr, key, ptk); | |
434 | /* Supplicant: swap tx/rx Mic keys */ | |
435 | os_memcpy(buf, ptk->u.auth.tx_mic_key, 8); | |
436 | os_memcpy(ptk->u.auth.tx_mic_key, ptk->u.auth.rx_mic_key, 8); | |
437 | os_memcpy(ptk->u.auth.rx_mic_key, buf, 8); | |
438 | sm->tptk_set = 1; | |
439 | ||
440 | if (wpa_supplicant_send_2_of_4(sm, sm->bssid, key, ver, sm->snonce, | |
441 | sm->assoc_wpa_ie, sm->assoc_wpa_ie_len, | |
442 | ptk)) | |
83935317 | 443 | goto failed; |
6fc6879b JM |
444 | |
445 | os_memcpy(sm->anonce, key->key_nonce, WPA_NONCE_LEN); | |
83935317 JM |
446 | return; |
447 | ||
448 | failed: | |
449 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); | |
6fc6879b JM |
450 | } |
451 | ||
452 | ||
453 | static void wpa_sm_start_preauth(void *eloop_ctx, void *timeout_ctx) | |
454 | { | |
455 | struct wpa_sm *sm = eloop_ctx; | |
456 | rsn_preauth_candidate_process(sm); | |
457 | } | |
458 | ||
459 | ||
460 | static void wpa_supplicant_key_neg_complete(struct wpa_sm *sm, | |
461 | const u8 *addr, int secure) | |
462 | { | |
0f057fb2 JM |
463 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
464 | "WPA: Key negotiation completed with " | |
6fc6879b JM |
465 | MACSTR " [PTK=%s GTK=%s]", MAC2STR(addr), |
466 | wpa_cipher_txt(sm->pairwise_cipher), | |
467 | wpa_cipher_txt(sm->group_cipher)); | |
6fc6879b JM |
468 | wpa_sm_cancel_auth_timeout(sm); |
469 | wpa_sm_set_state(sm, WPA_COMPLETED); | |
470 | ||
471 | if (secure) { | |
472 | wpa_sm_mlme_setprotection( | |
473 | sm, addr, MLME_SETPROTECTION_PROTECT_TYPE_RX_TX, | |
474 | MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); | |
475 | eapol_sm_notify_portValid(sm->eapol, TRUE); | |
56586197 | 476 | if (wpa_key_mgmt_wpa_psk(sm->key_mgmt)) |
6fc6879b JM |
477 | eapol_sm_notify_eap_success(sm->eapol, TRUE); |
478 | /* | |
479 | * Start preauthentication after a short wait to avoid a | |
480 | * possible race condition between the data receive and key | |
481 | * configuration after the 4-Way Handshake. This increases the | |
ffbf1eaa | 482 | * likelihood of the first preauth EAPOL-Start frame getting to |
6fc6879b JM |
483 | * the target AP. |
484 | */ | |
485 | eloop_register_timeout(1, 0, wpa_sm_start_preauth, sm, NULL); | |
486 | } | |
487 | ||
488 | if (sm->cur_pmksa && sm->cur_pmksa->opportunistic) { | |
f049052b BG |
489 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
490 | "RSN: Authenticator accepted " | |
491 | "opportunistic PMKSA entry - marking it valid"); | |
6fc6879b JM |
492 | sm->cur_pmksa->opportunistic = 0; |
493 | } | |
494 | ||
495 | #ifdef CONFIG_IEEE80211R | |
56586197 | 496 | if (wpa_key_mgmt_ft(sm->key_mgmt)) { |
6fc6879b | 497 | /* Prepare for the next transition */ |
76b7981d | 498 | wpa_ft_prepare_auth_request(sm, NULL); |
6fc6879b JM |
499 | } |
500 | #endif /* CONFIG_IEEE80211R */ | |
501 | } | |
502 | ||
503 | ||
581a8cde JM |
504 | static void wpa_sm_rekey_ptk(void *eloop_ctx, void *timeout_ctx) |
505 | { | |
506 | struct wpa_sm *sm = eloop_ctx; | |
f049052b | 507 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Request PTK rekeying"); |
581a8cde JM |
508 | wpa_sm_key_request(sm, 0, 1); |
509 | } | |
510 | ||
511 | ||
6fc6879b JM |
512 | static int wpa_supplicant_install_ptk(struct wpa_sm *sm, |
513 | const struct wpa_eapol_key *key) | |
514 | { | |
515 | int keylen, rsclen; | |
71934751 | 516 | enum wpa_alg alg; |
6fc6879b JM |
517 | const u8 *key_rsc; |
518 | u8 null_rsc[8] = { 0, 0, 0, 0, 0, 0, 0, 0 }; | |
519 | ||
f049052b BG |
520 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
521 | "WPA: Installing PTK to the driver"); | |
6fc6879b | 522 | |
c3550295 | 523 | if (sm->pairwise_cipher == WPA_CIPHER_NONE) { |
f049052b BG |
524 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Pairwise Cipher " |
525 | "Suite: NONE - do not use pairwise keys"); | |
6fc6879b | 526 | return 0; |
c3550295 JM |
527 | } |
528 | ||
529 | if (!wpa_cipher_valid_pairwise(sm->pairwise_cipher)) { | |
f049052b BG |
530 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
531 | "WPA: Unsupported pairwise cipher %d", | |
532 | sm->pairwise_cipher); | |
6fc6879b JM |
533 | return -1; |
534 | } | |
535 | ||
c3550295 JM |
536 | alg = wpa_cipher_to_alg(sm->pairwise_cipher); |
537 | keylen = wpa_cipher_key_len(sm->pairwise_cipher); | |
538 | rsclen = wpa_cipher_rsc_len(sm->pairwise_cipher); | |
539 | ||
6fc6879b JM |
540 | if (sm->proto == WPA_PROTO_RSN) { |
541 | key_rsc = null_rsc; | |
542 | } else { | |
543 | key_rsc = key->key_rsc; | |
544 | wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, rsclen); | |
545 | } | |
546 | ||
547 | if (wpa_sm_set_key(sm, alg, sm->bssid, 0, 1, key_rsc, rsclen, | |
548 | (u8 *) sm->ptk.tk1, keylen) < 0) { | |
f049052b BG |
549 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
550 | "WPA: Failed to set PTK to the " | |
551 | "driver (alg=%d keylen=%d bssid=" MACSTR ")", | |
552 | alg, keylen, MAC2STR(sm->bssid)); | |
6fc6879b JM |
553 | return -1; |
554 | } | |
581a8cde JM |
555 | |
556 | if (sm->wpa_ptk_rekey) { | |
557 | eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); | |
558 | eloop_register_timeout(sm->wpa_ptk_rekey, 0, wpa_sm_rekey_ptk, | |
559 | sm, NULL); | |
560 | } | |
561 | ||
6fc6879b JM |
562 | return 0; |
563 | } | |
564 | ||
565 | ||
f049052b BG |
566 | static int wpa_supplicant_check_group_cipher(struct wpa_sm *sm, |
567 | int group_cipher, | |
6fc6879b | 568 | int keylen, int maxkeylen, |
71934751 JM |
569 | int *key_rsc_len, |
570 | enum wpa_alg *alg) | |
6fc6879b | 571 | { |
c3550295 | 572 | int klen; |
6fc6879b | 573 | |
c3550295 JM |
574 | *alg = wpa_cipher_to_alg(group_cipher); |
575 | if (*alg == WPA_ALG_NONE) { | |
f049052b BG |
576 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
577 | "WPA: Unsupported Group Cipher %d", | |
578 | group_cipher); | |
6fc6879b JM |
579 | return -1; |
580 | } | |
c3550295 | 581 | *key_rsc_len = wpa_cipher_rsc_len(group_cipher); |
6fc6879b | 582 | |
c3550295 JM |
583 | klen = wpa_cipher_key_len(group_cipher); |
584 | if (keylen != klen || maxkeylen < klen) { | |
f049052b BG |
585 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
586 | "WPA: Unsupported %s Group Cipher key length %d (%d)", | |
587 | wpa_cipher_txt(group_cipher), keylen, maxkeylen); | |
c3550295 | 588 | return -1; |
6fc6879b | 589 | } |
c3550295 | 590 | return 0; |
6fc6879b JM |
591 | } |
592 | ||
593 | ||
594 | struct wpa_gtk_data { | |
71934751 | 595 | enum wpa_alg alg; |
6fc6879b JM |
596 | int tx, key_rsc_len, keyidx; |
597 | u8 gtk[32]; | |
598 | int gtk_len; | |
599 | }; | |
600 | ||
601 | ||
602 | static int wpa_supplicant_install_gtk(struct wpa_sm *sm, | |
603 | const struct wpa_gtk_data *gd, | |
604 | const u8 *key_rsc) | |
605 | { | |
606 | const u8 *_gtk = gd->gtk; | |
607 | u8 gtk_buf[32]; | |
608 | ||
609 | wpa_hexdump_key(MSG_DEBUG, "WPA: Group Key", gd->gtk, gd->gtk_len); | |
f049052b BG |
610 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
611 | "WPA: Installing GTK to the driver (keyidx=%d tx=%d len=%d)", | |
612 | gd->keyidx, gd->tx, gd->gtk_len); | |
6fc6879b JM |
613 | wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, gd->key_rsc_len); |
614 | if (sm->group_cipher == WPA_CIPHER_TKIP) { | |
615 | /* Swap Tx/Rx keys for Michael MIC */ | |
616 | os_memcpy(gtk_buf, gd->gtk, 16); | |
617 | os_memcpy(gtk_buf + 16, gd->gtk + 24, 8); | |
618 | os_memcpy(gtk_buf + 24, gd->gtk + 16, 8); | |
619 | _gtk = gtk_buf; | |
620 | } | |
621 | if (sm->pairwise_cipher == WPA_CIPHER_NONE) { | |
0382097e | 622 | if (wpa_sm_set_key(sm, gd->alg, NULL, |
6fc6879b JM |
623 | gd->keyidx, 1, key_rsc, gd->key_rsc_len, |
624 | _gtk, gd->gtk_len) < 0) { | |
f049052b BG |
625 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
626 | "WPA: Failed to set GTK to the driver " | |
627 | "(Group only)"); | |
6fc6879b JM |
628 | return -1; |
629 | } | |
0382097e | 630 | } else if (wpa_sm_set_key(sm, gd->alg, broadcast_ether_addr, |
6fc6879b JM |
631 | gd->keyidx, gd->tx, key_rsc, gd->key_rsc_len, |
632 | _gtk, gd->gtk_len) < 0) { | |
f049052b BG |
633 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
634 | "WPA: Failed to set GTK to " | |
635 | "the driver (alg=%d keylen=%d keyidx=%d)", | |
636 | gd->alg, gd->gtk_len, gd->keyidx); | |
6fc6879b JM |
637 | return -1; |
638 | } | |
639 | ||
640 | return 0; | |
641 | } | |
642 | ||
643 | ||
644 | static int wpa_supplicant_gtk_tx_bit_workaround(const struct wpa_sm *sm, | |
645 | int tx) | |
646 | { | |
647 | if (tx && sm->pairwise_cipher != WPA_CIPHER_NONE) { | |
648 | /* Ignore Tx bit for GTK if a pairwise key is used. One AP | |
649 | * seemed to set this bit (incorrectly, since Tx is only when | |
650 | * doing Group Key only APs) and without this workaround, the | |
651 | * data connection does not work because wpa_supplicant | |
652 | * configured non-zero keyidx to be used for unicast. */ | |
f049052b BG |
653 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
654 | "WPA: Tx bit set for GTK, but pairwise " | |
655 | "keys are used - ignore Tx bit"); | |
6fc6879b JM |
656 | return 0; |
657 | } | |
658 | return tx; | |
659 | } | |
660 | ||
661 | ||
662 | static int wpa_supplicant_pairwise_gtk(struct wpa_sm *sm, | |
663 | const struct wpa_eapol_key *key, | |
664 | const u8 *gtk, size_t gtk_len, | |
665 | int key_info) | |
666 | { | |
667 | #ifndef CONFIG_NO_WPA2 | |
668 | struct wpa_gtk_data gd; | |
669 | ||
670 | /* | |
671 | * IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames - Figure 43x | |
672 | * GTK KDE format: | |
673 | * KeyID[bits 0-1], Tx [bit 2], Reserved [bits 3-7] | |
674 | * Reserved [bits 0-7] | |
675 | * GTK | |
676 | */ | |
677 | ||
678 | os_memset(&gd, 0, sizeof(gd)); | |
679 | wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in pairwise handshake", | |
680 | gtk, gtk_len); | |
681 | ||
682 | if (gtk_len < 2 || gtk_len - 2 > sizeof(gd.gtk)) | |
683 | return -1; | |
684 | ||
685 | gd.keyidx = gtk[0] & 0x3; | |
686 | gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm, | |
687 | !!(gtk[0] & BIT(2))); | |
688 | gtk += 2; | |
689 | gtk_len -= 2; | |
690 | ||
691 | os_memcpy(gd.gtk, gtk, gtk_len); | |
692 | gd.gtk_len = gtk_len; | |
693 | ||
f049052b | 694 | if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, |
6fc6879b JM |
695 | gtk_len, gtk_len, |
696 | &gd.key_rsc_len, &gd.alg) || | |
697 | wpa_supplicant_install_gtk(sm, &gd, key->key_rsc)) { | |
f049052b BG |
698 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
699 | "RSN: Failed to install GTK"); | |
6fc6879b JM |
700 | return -1; |
701 | } | |
702 | ||
703 | wpa_supplicant_key_neg_complete(sm, sm->bssid, | |
704 | key_info & WPA_KEY_INFO_SECURE); | |
705 | return 0; | |
706 | #else /* CONFIG_NO_WPA2 */ | |
707 | return -1; | |
708 | #endif /* CONFIG_NO_WPA2 */ | |
709 | } | |
710 | ||
711 | ||
712 | static int ieee80211w_set_keys(struct wpa_sm *sm, | |
713 | struct wpa_eapol_ie_parse *ie) | |
714 | { | |
715 | #ifdef CONFIG_IEEE80211W | |
716 | if (sm->mgmt_group_cipher != WPA_CIPHER_AES_128_CMAC) | |
717 | return 0; | |
718 | ||
719 | if (ie->igtk) { | |
720 | const struct wpa_igtk_kde *igtk; | |
721 | u16 keyidx; | |
722 | if (ie->igtk_len != sizeof(*igtk)) | |
723 | return -1; | |
724 | igtk = (const struct wpa_igtk_kde *) ie->igtk; | |
725 | keyidx = WPA_GET_LE16(igtk->keyid); | |
f049052b BG |
726 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: IGTK keyid %d " |
727 | "pn %02x%02x%02x%02x%02x%02x", | |
728 | keyidx, MAC2STR(igtk->pn)); | |
6fc6879b JM |
729 | wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK", |
730 | igtk->igtk, WPA_IGTK_LEN); | |
731 | if (keyidx > 4095) { | |
f049052b BG |
732 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
733 | "WPA: Invalid IGTK KeyID %d", keyidx); | |
6fc6879b JM |
734 | return -1; |
735 | } | |
0382097e | 736 | if (wpa_sm_set_key(sm, WPA_ALG_IGTK, broadcast_ether_addr, |
6fc6879b JM |
737 | keyidx, 0, igtk->pn, sizeof(igtk->pn), |
738 | igtk->igtk, WPA_IGTK_LEN) < 0) { | |
f049052b BG |
739 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
740 | "WPA: Failed to configure IGTK to the driver"); | |
6fc6879b JM |
741 | return -1; |
742 | } | |
743 | } | |
744 | ||
745 | return 0; | |
746 | #else /* CONFIG_IEEE80211W */ | |
747 | return 0; | |
748 | #endif /* CONFIG_IEEE80211W */ | |
749 | } | |
750 | ||
751 | ||
752 | static void wpa_report_ie_mismatch(struct wpa_sm *sm, | |
753 | const char *reason, const u8 *src_addr, | |
754 | const u8 *wpa_ie, size_t wpa_ie_len, | |
755 | const u8 *rsn_ie, size_t rsn_ie_len) | |
756 | { | |
0f057fb2 | 757 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: %s (src=" MACSTR ")", |
6fc6879b JM |
758 | reason, MAC2STR(src_addr)); |
759 | ||
760 | if (sm->ap_wpa_ie) { | |
761 | wpa_hexdump(MSG_INFO, "WPA: WPA IE in Beacon/ProbeResp", | |
762 | sm->ap_wpa_ie, sm->ap_wpa_ie_len); | |
763 | } | |
764 | if (wpa_ie) { | |
765 | if (!sm->ap_wpa_ie) { | |
f049052b BG |
766 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
767 | "WPA: No WPA IE in Beacon/ProbeResp"); | |
6fc6879b JM |
768 | } |
769 | wpa_hexdump(MSG_INFO, "WPA: WPA IE in 3/4 msg", | |
770 | wpa_ie, wpa_ie_len); | |
771 | } | |
772 | ||
773 | if (sm->ap_rsn_ie) { | |
774 | wpa_hexdump(MSG_INFO, "WPA: RSN IE in Beacon/ProbeResp", | |
775 | sm->ap_rsn_ie, sm->ap_rsn_ie_len); | |
776 | } | |
777 | if (rsn_ie) { | |
778 | if (!sm->ap_rsn_ie) { | |
f049052b BG |
779 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
780 | "WPA: No RSN IE in Beacon/ProbeResp"); | |
6fc6879b JM |
781 | } |
782 | wpa_hexdump(MSG_INFO, "WPA: RSN IE in 3/4 msg", | |
783 | rsn_ie, rsn_ie_len); | |
784 | } | |
785 | ||
3da372fa | 786 | wpa_sm_deauthenticate(sm, WLAN_REASON_IE_IN_4WAY_DIFFERS); |
6fc6879b JM |
787 | } |
788 | ||
789 | ||
5af8187e JM |
790 | #ifdef CONFIG_IEEE80211R |
791 | ||
792 | static int ft_validate_mdie(struct wpa_sm *sm, | |
793 | const unsigned char *src_addr, | |
3b4f6dac JM |
794 | struct wpa_eapol_ie_parse *ie, |
795 | const u8 *assoc_resp_mdie) | |
5af8187e JM |
796 | { |
797 | struct rsn_mdie *mdie; | |
798 | ||
5af8187e JM |
799 | mdie = (struct rsn_mdie *) (ie->mdie + 2); |
800 | if (ie->mdie == NULL || ie->mdie_len < 2 + sizeof(*mdie) || | |
801 | os_memcmp(mdie->mobility_domain, sm->mobility_domain, | |
802 | MOBILITY_DOMAIN_ID_LEN) != 0) { | |
f049052b BG |
803 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE in msg 3/4 did " |
804 | "not match with the current mobility domain"); | |
5af8187e JM |
805 | return -1; |
806 | } | |
807 | ||
3b4f6dac JM |
808 | if (assoc_resp_mdie && |
809 | (assoc_resp_mdie[1] != ie->mdie[1] || | |
810 | os_memcmp(assoc_resp_mdie, ie->mdie, 2 + ie->mdie[1]) != 0)) { | |
f049052b | 811 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE mismatch"); |
3b4f6dac JM |
812 | wpa_hexdump(MSG_DEBUG, "FT: MDIE in EAPOL-Key msg 3/4", |
813 | ie->mdie, 2 + ie->mdie[1]); | |
814 | wpa_hexdump(MSG_DEBUG, "FT: MDIE in (Re)Association Response", | |
815 | assoc_resp_mdie, 2 + assoc_resp_mdie[1]); | |
816 | return -1; | |
817 | } | |
818 | ||
819 | return 0; | |
820 | } | |
821 | ||
822 | ||
823 | static int ft_validate_ftie(struct wpa_sm *sm, | |
824 | const unsigned char *src_addr, | |
825 | struct wpa_eapol_ie_parse *ie, | |
826 | const u8 *assoc_resp_ftie) | |
827 | { | |
828 | if (ie->ftie == NULL) { | |
f049052b BG |
829 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
830 | "FT: No FTIE in EAPOL-Key msg 3/4"); | |
3b4f6dac JM |
831 | return -1; |
832 | } | |
833 | ||
834 | if (assoc_resp_ftie == NULL) | |
835 | return 0; | |
836 | ||
837 | if (assoc_resp_ftie[1] != ie->ftie[1] || | |
838 | os_memcmp(assoc_resp_ftie, ie->ftie, 2 + ie->ftie[1]) != 0) { | |
f049052b | 839 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: FTIE mismatch"); |
3b4f6dac JM |
840 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 3/4", |
841 | ie->ftie, 2 + ie->ftie[1]); | |
842 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)Association Response", | |
843 | assoc_resp_ftie, 2 + assoc_resp_ftie[1]); | |
844 | return -1; | |
845 | } | |
846 | ||
5af8187e JM |
847 | return 0; |
848 | } | |
849 | ||
850 | ||
851 | static int ft_validate_rsnie(struct wpa_sm *sm, | |
852 | const unsigned char *src_addr, | |
853 | struct wpa_eapol_ie_parse *ie) | |
854 | { | |
855 | struct wpa_ie_data rsn; | |
856 | ||
857 | if (!ie->rsn_ie) | |
858 | return 0; | |
859 | ||
860 | /* | |
861 | * Verify that PMKR1Name from EAPOL-Key message 3/4 | |
862 | * matches with the value we derived. | |
863 | */ | |
864 | if (wpa_parse_wpa_ie_rsn(ie->rsn_ie, ie->rsn_ie_len, &rsn) < 0 || | |
865 | rsn.num_pmkid != 1 || rsn.pmkid == NULL) { | |
f049052b BG |
866 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: No PMKR1Name in " |
867 | "FT 4-way handshake message 3/4"); | |
5af8187e JM |
868 | return -1; |
869 | } | |
870 | ||
871 | if (os_memcmp(rsn.pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0) { | |
f049052b BG |
872 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
873 | "FT: PMKR1Name mismatch in " | |
874 | "FT 4-way handshake message 3/4"); | |
5af8187e JM |
875 | wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Authenticator", |
876 | rsn.pmkid, WPA_PMK_NAME_LEN); | |
877 | wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name", | |
878 | sm->pmk_r1_name, WPA_PMK_NAME_LEN); | |
879 | return -1; | |
880 | } | |
881 | ||
882 | return 0; | |
883 | } | |
884 | ||
885 | ||
886 | static int wpa_supplicant_validate_ie_ft(struct wpa_sm *sm, | |
887 | const unsigned char *src_addr, | |
888 | struct wpa_eapol_ie_parse *ie) | |
889 | { | |
3b4f6dac JM |
890 | const u8 *pos, *end, *mdie = NULL, *ftie = NULL; |
891 | ||
892 | if (sm->assoc_resp_ies) { | |
893 | pos = sm->assoc_resp_ies; | |
894 | end = pos + sm->assoc_resp_ies_len; | |
895 | while (pos + 2 < end) { | |
896 | if (pos + 2 + pos[1] > end) | |
897 | break; | |
898 | switch (*pos) { | |
899 | case WLAN_EID_MOBILITY_DOMAIN: | |
900 | mdie = pos; | |
901 | break; | |
902 | case WLAN_EID_FAST_BSS_TRANSITION: | |
903 | ftie = pos; | |
904 | break; | |
905 | } | |
906 | pos += 2 + pos[1]; | |
907 | } | |
908 | } | |
909 | ||
910 | if (ft_validate_mdie(sm, src_addr, ie, mdie) < 0 || | |
911 | ft_validate_ftie(sm, src_addr, ie, ftie) < 0 || | |
5af8187e JM |
912 | ft_validate_rsnie(sm, src_addr, ie) < 0) |
913 | return -1; | |
914 | ||
915 | return 0; | |
916 | } | |
917 | ||
918 | #endif /* CONFIG_IEEE80211R */ | |
919 | ||
920 | ||
6fc6879b JM |
921 | static int wpa_supplicant_validate_ie(struct wpa_sm *sm, |
922 | const unsigned char *src_addr, | |
923 | struct wpa_eapol_ie_parse *ie) | |
924 | { | |
925 | if (sm->ap_wpa_ie == NULL && sm->ap_rsn_ie == NULL) { | |
f049052b BG |
926 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
927 | "WPA: No WPA/RSN IE for this AP known. " | |
928 | "Trying to get from scan results"); | |
6fc6879b | 929 | if (wpa_sm_get_beacon_ie(sm) < 0) { |
f049052b BG |
930 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
931 | "WPA: Could not find AP from " | |
932 | "the scan results"); | |
6fc6879b | 933 | } else { |
f049052b BG |
934 | wpa_msg(sm->ctx->msg_ctx, MSG_DEBUG, |
935 | "WPA: Found the current AP from " | |
936 | "updated scan results"); | |
6fc6879b JM |
937 | } |
938 | } | |
939 | ||
940 | if (ie->wpa_ie == NULL && ie->rsn_ie == NULL && | |
941 | (sm->ap_wpa_ie || sm->ap_rsn_ie)) { | |
942 | wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " | |
943 | "with IE in Beacon/ProbeResp (no IE?)", | |
944 | src_addr, ie->wpa_ie, ie->wpa_ie_len, | |
945 | ie->rsn_ie, ie->rsn_ie_len); | |
946 | return -1; | |
947 | } | |
948 | ||
949 | if ((ie->wpa_ie && sm->ap_wpa_ie && | |
950 | (ie->wpa_ie_len != sm->ap_wpa_ie_len || | |
951 | os_memcmp(ie->wpa_ie, sm->ap_wpa_ie, ie->wpa_ie_len) != 0)) || | |
952 | (ie->rsn_ie && sm->ap_rsn_ie && | |
26e23750 JM |
953 | wpa_compare_rsn_ie(wpa_key_mgmt_ft(sm->key_mgmt), |
954 | sm->ap_rsn_ie, sm->ap_rsn_ie_len, | |
955 | ie->rsn_ie, ie->rsn_ie_len))) { | |
6fc6879b JM |
956 | wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " |
957 | "with IE in Beacon/ProbeResp", | |
958 | src_addr, ie->wpa_ie, ie->wpa_ie_len, | |
959 | ie->rsn_ie, ie->rsn_ie_len); | |
960 | return -1; | |
961 | } | |
962 | ||
963 | if (sm->proto == WPA_PROTO_WPA && | |
964 | ie->rsn_ie && sm->ap_rsn_ie == NULL && sm->rsn_enabled) { | |
965 | wpa_report_ie_mismatch(sm, "Possible downgrade attack " | |
966 | "detected - RSN was enabled and RSN IE " | |
967 | "was in msg 3/4, but not in " | |
968 | "Beacon/ProbeResp", | |
969 | src_addr, ie->wpa_ie, ie->wpa_ie_len, | |
970 | ie->rsn_ie, ie->rsn_ie_len); | |
971 | return -1; | |
972 | } | |
973 | ||
974 | #ifdef CONFIG_IEEE80211R | |
5af8187e JM |
975 | if (wpa_key_mgmt_ft(sm->key_mgmt) && |
976 | wpa_supplicant_validate_ie_ft(sm, src_addr, ie) < 0) | |
977 | return -1; | |
6fc6879b JM |
978 | #endif /* CONFIG_IEEE80211R */ |
979 | ||
980 | return 0; | |
981 | } | |
982 | ||
983 | ||
984 | /** | |
985 | * wpa_supplicant_send_4_of_4 - Send message 4 of WPA/RSN 4-Way Handshake | |
986 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
987 | * @dst: Destination address for the frame | |
988 | * @key: Pointer to the EAPOL-Key frame header | |
989 | * @ver: Version bits from EAPOL-Key Key Info | |
990 | * @key_info: Key Info | |
991 | * @kde: KDEs to include the EAPOL-Key frame | |
992 | * @kde_len: Length of KDEs | |
993 | * @ptk: PTK to use for keyed hash and encryption | |
994 | * Returns: 0 on success, -1 on failure | |
995 | */ | |
996 | int wpa_supplicant_send_4_of_4(struct wpa_sm *sm, const unsigned char *dst, | |
997 | const struct wpa_eapol_key *key, | |
998 | u16 ver, u16 key_info, | |
999 | const u8 *kde, size_t kde_len, | |
1000 | struct wpa_ptk *ptk) | |
1001 | { | |
1002 | size_t rlen; | |
1003 | struct wpa_eapol_key *reply; | |
1004 | u8 *rbuf; | |
1005 | ||
1006 | if (kde) | |
1007 | wpa_hexdump(MSG_DEBUG, "WPA: KDE for msg 4/4", kde, kde_len); | |
1008 | ||
1009 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, | |
1010 | sizeof(*reply) + kde_len, | |
1011 | &rlen, (void *) &reply); | |
1012 | if (rbuf == NULL) | |
1013 | return -1; | |
1014 | ||
1015 | reply->type = sm->proto == WPA_PROTO_RSN ? | |
1016 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; | |
1017 | key_info &= WPA_KEY_INFO_SECURE; | |
1018 | key_info |= ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_MIC; | |
1019 | WPA_PUT_BE16(reply->key_info, key_info); | |
1020 | if (sm->proto == WPA_PROTO_RSN) | |
1021 | WPA_PUT_BE16(reply->key_length, 0); | |
1022 | else | |
1023 | os_memcpy(reply->key_length, key->key_length, 2); | |
1024 | os_memcpy(reply->replay_counter, key->replay_counter, | |
1025 | WPA_REPLAY_COUNTER_LEN); | |
1026 | ||
1027 | WPA_PUT_BE16(reply->key_data_length, kde_len); | |
1028 | if (kde) | |
1029 | os_memcpy(reply + 1, kde, kde_len); | |
1030 | ||
f049052b | 1031 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 4/4"); |
6fc6879b JM |
1032 | wpa_eapol_key_send(sm, ptk->kck, ver, dst, ETH_P_EAPOL, |
1033 | rbuf, rlen, reply->key_mic); | |
1034 | ||
1035 | return 0; | |
1036 | } | |
1037 | ||
1038 | ||
1039 | static void wpa_supplicant_process_3_of_4(struct wpa_sm *sm, | |
1040 | const struct wpa_eapol_key *key, | |
1041 | u16 ver) | |
1042 | { | |
1043 | u16 key_info, keylen, len; | |
1044 | const u8 *pos; | |
1045 | struct wpa_eapol_ie_parse ie; | |
1046 | ||
1047 | wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE); | |
f049052b BG |
1048 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 3 of 4-Way " |
1049 | "Handshake from " MACSTR " (ver=%d)", MAC2STR(sm->bssid), ver); | |
6fc6879b JM |
1050 | |
1051 | key_info = WPA_GET_BE16(key->key_info); | |
1052 | ||
1053 | pos = (const u8 *) (key + 1); | |
1054 | len = WPA_GET_BE16(key->key_data_length); | |
1055 | wpa_hexdump(MSG_DEBUG, "WPA: IE KeyData", pos, len); | |
d627a939 JM |
1056 | if (wpa_supplicant_parse_ies(pos, len, &ie) < 0) |
1057 | goto failed; | |
6fc6879b | 1058 | if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { |
f049052b BG |
1059 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1060 | "WPA: GTK IE in unencrypted key data"); | |
83935317 | 1061 | goto failed; |
6fc6879b JM |
1062 | } |
1063 | #ifdef CONFIG_IEEE80211W | |
1064 | if (ie.igtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { | |
f049052b BG |
1065 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1066 | "WPA: IGTK KDE in unencrypted key data"); | |
83935317 | 1067 | goto failed; |
6fc6879b JM |
1068 | } |
1069 | ||
1070 | if (ie.igtk && ie.igtk_len != sizeof(struct wpa_igtk_kde)) { | |
f049052b BG |
1071 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1072 | "WPA: Invalid IGTK KDE length %lu", | |
1073 | (unsigned long) ie.igtk_len); | |
83935317 | 1074 | goto failed; |
6fc6879b JM |
1075 | } |
1076 | #endif /* CONFIG_IEEE80211W */ | |
1077 | ||
1078 | if (wpa_supplicant_validate_ie(sm, sm->bssid, &ie) < 0) | |
83935317 | 1079 | goto failed; |
6fc6879b JM |
1080 | |
1081 | if (os_memcmp(sm->anonce, key->key_nonce, WPA_NONCE_LEN) != 0) { | |
f049052b BG |
1082 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1083 | "WPA: ANonce from message 1 of 4-Way Handshake " | |
1084 | "differs from 3 of 4-Way Handshake - drop packet (src=" | |
1085 | MACSTR ")", MAC2STR(sm->bssid)); | |
83935317 | 1086 | goto failed; |
6fc6879b JM |
1087 | } |
1088 | ||
1089 | keylen = WPA_GET_BE16(key->key_length); | |
c3550295 JM |
1090 | if (keylen != wpa_cipher_key_len(sm->pairwise_cipher)) { |
1091 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, | |
1092 | "WPA: Invalid %s key length %d (src=" MACSTR | |
1093 | ")", wpa_cipher_txt(sm->pairwise_cipher), keylen, | |
1094 | MAC2STR(sm->bssid)); | |
1095 | goto failed; | |
6fc6879b JM |
1096 | } |
1097 | ||
1098 | if (wpa_supplicant_send_4_of_4(sm, sm->bssid, key, ver, key_info, | |
83935317 JM |
1099 | NULL, 0, &sm->ptk)) { |
1100 | goto failed; | |
1101 | } | |
6fc6879b JM |
1102 | |
1103 | /* SNonce was successfully used in msg 3/4, so mark it to be renewed | |
1104 | * for the next 4-Way Handshake. If msg 3 is received again, the old | |
1105 | * SNonce will still be used to avoid changing PTK. */ | |
1106 | sm->renew_snonce = 1; | |
1107 | ||
1108 | if (key_info & WPA_KEY_INFO_INSTALL) { | |
83935317 JM |
1109 | if (wpa_supplicant_install_ptk(sm, key)) |
1110 | goto failed; | |
6fc6879b JM |
1111 | } |
1112 | ||
1113 | if (key_info & WPA_KEY_INFO_SECURE) { | |
1114 | wpa_sm_mlme_setprotection( | |
1115 | sm, sm->bssid, MLME_SETPROTECTION_PROTECT_TYPE_RX, | |
1116 | MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); | |
1117 | eapol_sm_notify_portValid(sm->eapol, TRUE); | |
1118 | } | |
1119 | wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); | |
1120 | ||
1121 | if (ie.gtk && | |
1122 | wpa_supplicant_pairwise_gtk(sm, key, | |
1123 | ie.gtk, ie.gtk_len, key_info) < 0) { | |
f049052b BG |
1124 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1125 | "RSN: Failed to configure GTK"); | |
83935317 | 1126 | goto failed; |
6fc6879b JM |
1127 | } |
1128 | ||
83935317 | 1129 | if (ieee80211w_set_keys(sm, &ie) < 0) { |
f049052b BG |
1130 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1131 | "RSN: Failed to configure IGTK"); | |
83935317 JM |
1132 | goto failed; |
1133 | } | |
1134 | ||
b14a210c JB |
1135 | wpa_sm_set_rekey_offload(sm); |
1136 | ||
83935317 JM |
1137 | return; |
1138 | ||
1139 | failed: | |
1140 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); | |
6fc6879b JM |
1141 | } |
1142 | ||
1143 | ||
1144 | static int wpa_supplicant_process_1_of_2_rsn(struct wpa_sm *sm, | |
1145 | const u8 *keydata, | |
1146 | size_t keydatalen, | |
1147 | u16 key_info, | |
1148 | struct wpa_gtk_data *gd) | |
1149 | { | |
1150 | int maxkeylen; | |
1151 | struct wpa_eapol_ie_parse ie; | |
1152 | ||
1153 | wpa_hexdump(MSG_DEBUG, "RSN: msg 1/2 key data", keydata, keydatalen); | |
d627a939 JM |
1154 | if (wpa_supplicant_parse_ies(keydata, keydatalen, &ie) < 0) |
1155 | return -1; | |
6fc6879b | 1156 | if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { |
f049052b BG |
1157 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1158 | "WPA: GTK IE in unencrypted key data"); | |
6fc6879b JM |
1159 | return -1; |
1160 | } | |
1161 | if (ie.gtk == NULL) { | |
f049052b BG |
1162 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1163 | "WPA: No GTK IE in Group Key msg 1/2"); | |
6fc6879b JM |
1164 | return -1; |
1165 | } | |
1166 | maxkeylen = gd->gtk_len = ie.gtk_len - 2; | |
1167 | ||
f049052b | 1168 | if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, |
6fc6879b JM |
1169 | gd->gtk_len, maxkeylen, |
1170 | &gd->key_rsc_len, &gd->alg)) | |
1171 | return -1; | |
1172 | ||
1173 | wpa_hexdump(MSG_DEBUG, "RSN: received GTK in group key handshake", | |
1174 | ie.gtk, ie.gtk_len); | |
1175 | gd->keyidx = ie.gtk[0] & 0x3; | |
1176 | gd->tx = wpa_supplicant_gtk_tx_bit_workaround(sm, | |
1177 | !!(ie.gtk[0] & BIT(2))); | |
1178 | if (ie.gtk_len - 2 > sizeof(gd->gtk)) { | |
f049052b BG |
1179 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1180 | "RSN: Too long GTK in GTK IE (len=%lu)", | |
1181 | (unsigned long) ie.gtk_len - 2); | |
6fc6879b JM |
1182 | return -1; |
1183 | } | |
1184 | os_memcpy(gd->gtk, ie.gtk + 2, ie.gtk_len - 2); | |
1185 | ||
1186 | if (ieee80211w_set_keys(sm, &ie) < 0) | |
f049052b BG |
1187 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1188 | "RSN: Failed to configure IGTK"); | |
6fc6879b JM |
1189 | |
1190 | return 0; | |
1191 | } | |
1192 | ||
1193 | ||
1194 | static int wpa_supplicant_process_1_of_2_wpa(struct wpa_sm *sm, | |
1195 | const struct wpa_eapol_key *key, | |
1196 | size_t keydatalen, int key_info, | |
1197 | size_t extra_len, u16 ver, | |
1198 | struct wpa_gtk_data *gd) | |
1199 | { | |
1200 | size_t maxkeylen; | |
1201 | u8 ek[32]; | |
1202 | ||
1203 | gd->gtk_len = WPA_GET_BE16(key->key_length); | |
1204 | maxkeylen = keydatalen; | |
1205 | if (keydatalen > extra_len) { | |
f049052b BG |
1206 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1207 | "WPA: Truncated EAPOL-Key packet: " | |
1208 | "key_data_length=%lu > extra_len=%lu", | |
1209 | (unsigned long) keydatalen, (unsigned long) extra_len); | |
6fc6879b JM |
1210 | return -1; |
1211 | } | |
1212 | if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { | |
1213 | if (maxkeylen < 8) { | |
f049052b BG |
1214 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1215 | "WPA: Too short maxkeylen (%lu)", | |
1216 | (unsigned long) maxkeylen); | |
6fc6879b JM |
1217 | return -1; |
1218 | } | |
1219 | maxkeylen -= 8; | |
1220 | } | |
1221 | ||
f049052b | 1222 | if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, |
6fc6879b JM |
1223 | gd->gtk_len, maxkeylen, |
1224 | &gd->key_rsc_len, &gd->alg)) | |
1225 | return -1; | |
1226 | ||
1227 | gd->keyidx = (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> | |
1228 | WPA_KEY_INFO_KEY_INDEX_SHIFT; | |
1229 | if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) { | |
1230 | os_memcpy(ek, key->key_iv, 16); | |
1231 | os_memcpy(ek + 16, sm->ptk.kek, 16); | |
1232 | if (keydatalen > sizeof(gd->gtk)) { | |
f049052b BG |
1233 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1234 | "WPA: RC4 key data too long (%lu)", | |
1235 | (unsigned long) keydatalen); | |
6fc6879b JM |
1236 | return -1; |
1237 | } | |
1238 | os_memcpy(gd->gtk, key + 1, keydatalen); | |
7a215dfc | 1239 | if (rc4_skip(ek, 32, 256, gd->gtk, keydatalen)) { |
f049052b BG |
1240 | wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, |
1241 | "WPA: RC4 failed"); | |
7a215dfc JM |
1242 | return -1; |
1243 | } | |
6fc6879b JM |
1244 | } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { |
1245 | if (keydatalen % 8) { | |
f049052b BG |
1246 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1247 | "WPA: Unsupported AES-WRAP len %lu", | |
1248 | (unsigned long) keydatalen); | |
6fc6879b JM |
1249 | return -1; |
1250 | } | |
1251 | if (maxkeylen > sizeof(gd->gtk)) { | |
f049052b BG |
1252 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1253 | "WPA: AES-WRAP key data " | |
1254 | "too long (keydatalen=%lu maxkeylen=%lu)", | |
1255 | (unsigned long) keydatalen, | |
1256 | (unsigned long) maxkeylen); | |
6fc6879b JM |
1257 | return -1; |
1258 | } | |
1259 | if (aes_unwrap(sm->ptk.kek, maxkeylen / 8, | |
1260 | (const u8 *) (key + 1), gd->gtk)) { | |
f049052b BG |
1261 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1262 | "WPA: AES unwrap failed - could not decrypt " | |
1263 | "GTK"); | |
6fc6879b JM |
1264 | return -1; |
1265 | } | |
1266 | } else { | |
f049052b BG |
1267 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1268 | "WPA: Unsupported key_info type %d", ver); | |
6fc6879b JM |
1269 | return -1; |
1270 | } | |
1271 | gd->tx = wpa_supplicant_gtk_tx_bit_workaround( | |
1272 | sm, !!(key_info & WPA_KEY_INFO_TXRX)); | |
1273 | return 0; | |
1274 | } | |
1275 | ||
1276 | ||
1277 | static int wpa_supplicant_send_2_of_2(struct wpa_sm *sm, | |
1278 | const struct wpa_eapol_key *key, | |
1279 | int ver, u16 key_info) | |
1280 | { | |
1281 | size_t rlen; | |
1282 | struct wpa_eapol_key *reply; | |
1283 | u8 *rbuf; | |
1284 | ||
1285 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, | |
1286 | sizeof(*reply), &rlen, (void *) &reply); | |
1287 | if (rbuf == NULL) | |
1288 | return -1; | |
1289 | ||
1290 | reply->type = sm->proto == WPA_PROTO_RSN ? | |
1291 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; | |
1292 | key_info &= WPA_KEY_INFO_KEY_INDEX_MASK; | |
1293 | key_info |= ver | WPA_KEY_INFO_MIC | WPA_KEY_INFO_SECURE; | |
1294 | WPA_PUT_BE16(reply->key_info, key_info); | |
1295 | if (sm->proto == WPA_PROTO_RSN) | |
1296 | WPA_PUT_BE16(reply->key_length, 0); | |
1297 | else | |
1298 | os_memcpy(reply->key_length, key->key_length, 2); | |
1299 | os_memcpy(reply->replay_counter, key->replay_counter, | |
1300 | WPA_REPLAY_COUNTER_LEN); | |
1301 | ||
1302 | WPA_PUT_BE16(reply->key_data_length, 0); | |
1303 | ||
f049052b | 1304 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/2"); |
6fc6879b JM |
1305 | wpa_eapol_key_send(sm, sm->ptk.kck, ver, sm->bssid, ETH_P_EAPOL, |
1306 | rbuf, rlen, reply->key_mic); | |
1307 | ||
1308 | return 0; | |
1309 | } | |
1310 | ||
1311 | ||
1312 | static void wpa_supplicant_process_1_of_2(struct wpa_sm *sm, | |
1313 | const unsigned char *src_addr, | |
1314 | const struct wpa_eapol_key *key, | |
1315 | int extra_len, u16 ver) | |
1316 | { | |
1317 | u16 key_info, keydatalen; | |
1318 | int rekey, ret; | |
1319 | struct wpa_gtk_data gd; | |
1320 | ||
1321 | os_memset(&gd, 0, sizeof(gd)); | |
1322 | ||
1323 | rekey = wpa_sm_get_state(sm) == WPA_COMPLETED; | |
f049052b BG |
1324 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of Group Key " |
1325 | "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver); | |
6fc6879b JM |
1326 | |
1327 | key_info = WPA_GET_BE16(key->key_info); | |
1328 | keydatalen = WPA_GET_BE16(key->key_data_length); | |
1329 | ||
1330 | if (sm->proto == WPA_PROTO_RSN) { | |
1331 | ret = wpa_supplicant_process_1_of_2_rsn(sm, | |
1332 | (const u8 *) (key + 1), | |
1333 | keydatalen, key_info, | |
1334 | &gd); | |
1335 | } else { | |
1336 | ret = wpa_supplicant_process_1_of_2_wpa(sm, key, keydatalen, | |
1337 | key_info, extra_len, | |
1338 | ver, &gd); | |
1339 | } | |
1340 | ||
1341 | wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); | |
1342 | ||
1343 | if (ret) | |
83935317 | 1344 | goto failed; |
6fc6879b JM |
1345 | |
1346 | if (wpa_supplicant_install_gtk(sm, &gd, key->key_rsc) || | |
1347 | wpa_supplicant_send_2_of_2(sm, key, ver, key_info)) | |
83935317 | 1348 | goto failed; |
6fc6879b JM |
1349 | |
1350 | if (rekey) { | |
0f057fb2 | 1351 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Group rekeying " |
6fc6879b JM |
1352 | "completed with " MACSTR " [GTK=%s]", |
1353 | MAC2STR(sm->bssid), wpa_cipher_txt(sm->group_cipher)); | |
1354 | wpa_sm_cancel_auth_timeout(sm); | |
1355 | wpa_sm_set_state(sm, WPA_COMPLETED); | |
b14a210c JB |
1356 | |
1357 | wpa_sm_set_rekey_offload(sm); | |
6fc6879b JM |
1358 | } else { |
1359 | wpa_supplicant_key_neg_complete(sm, sm->bssid, | |
1360 | key_info & | |
1361 | WPA_KEY_INFO_SECURE); | |
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 | { | |
2101 | rsn_preauth_deinit(sm); | |
0639970d | 2102 | pmksa_cache_clear_current(sm); |
6fc6879b JM |
2103 | if (wpa_sm_get_state(sm) == WPA_4WAY_HANDSHAKE) |
2104 | sm->dot11RSNA4WayHandshakeFailures++; | |
40cf22e6 JM |
2105 | #ifdef CONFIG_TDLS |
2106 | wpa_tdls_disassoc(sm); | |
2107 | #endif /* CONFIG_TDLS */ | |
6fc6879b JM |
2108 | } |
2109 | ||
2110 | ||
2111 | /** | |
2112 | * wpa_sm_set_pmk - Set PMK | |
2113 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2114 | * @pmk: The new PMK | |
2115 | * @pmk_len: The length of the new PMK in bytes | |
2116 | * | |
2117 | * Configure the PMK for WPA state machine. | |
2118 | */ | |
2119 | void wpa_sm_set_pmk(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len) | |
2120 | { | |
2121 | if (sm == NULL) | |
2122 | return; | |
2123 | ||
2124 | sm->pmk_len = pmk_len; | |
2125 | os_memcpy(sm->pmk, pmk, pmk_len); | |
2126 | ||
2127 | #ifdef CONFIG_IEEE80211R | |
2128 | /* Set XXKey to be PSK for FT key derivation */ | |
2129 | sm->xxkey_len = pmk_len; | |
2130 | os_memcpy(sm->xxkey, pmk, pmk_len); | |
2131 | #endif /* CONFIG_IEEE80211R */ | |
2132 | } | |
2133 | ||
2134 | ||
2135 | /** | |
2136 | * wpa_sm_set_pmk_from_pmksa - Set PMK based on the current PMKSA | |
2137 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2138 | * | |
2139 | * Take the PMK from the current PMKSA into use. If no PMKSA is active, the PMK | |
2140 | * will be cleared. | |
2141 | */ | |
2142 | void wpa_sm_set_pmk_from_pmksa(struct wpa_sm *sm) | |
2143 | { | |
2144 | if (sm == NULL) | |
2145 | return; | |
2146 | ||
2147 | if (sm->cur_pmksa) { | |
2148 | sm->pmk_len = sm->cur_pmksa->pmk_len; | |
2149 | os_memcpy(sm->pmk, sm->cur_pmksa->pmk, sm->pmk_len); | |
2150 | } else { | |
2151 | sm->pmk_len = PMK_LEN; | |
2152 | os_memset(sm->pmk, 0, PMK_LEN); | |
2153 | } | |
2154 | } | |
2155 | ||
2156 | ||
2157 | /** | |
2158 | * wpa_sm_set_fast_reauth - Set fast reauthentication (EAP) enabled/disabled | |
2159 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2160 | * @fast_reauth: Whether fast reauthentication (EAP) is allowed | |
2161 | */ | |
2162 | void wpa_sm_set_fast_reauth(struct wpa_sm *sm, int fast_reauth) | |
2163 | { | |
2164 | if (sm) | |
2165 | sm->fast_reauth = fast_reauth; | |
2166 | } | |
2167 | ||
2168 | ||
2169 | /** | |
2170 | * wpa_sm_set_scard_ctx - Set context pointer for smartcard callbacks | |
2171 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2172 | * @scard_ctx: Context pointer for smartcard related callback functions | |
2173 | */ | |
2174 | void wpa_sm_set_scard_ctx(struct wpa_sm *sm, void *scard_ctx) | |
2175 | { | |
2176 | if (sm == NULL) | |
2177 | return; | |
2178 | sm->scard_ctx = scard_ctx; | |
2179 | if (sm->preauth_eapol) | |
2180 | eapol_sm_register_scard_ctx(sm->preauth_eapol, scard_ctx); | |
2181 | } | |
2182 | ||
2183 | ||
2184 | /** | |
2185 | * wpa_sm_set_config - Notification of current configration change | |
2186 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2187 | * @config: Pointer to current network configuration | |
2188 | * | |
2189 | * Notify WPA state machine that configuration has changed. config will be | |
2190 | * stored as a backpointer to network configuration. This can be %NULL to clear | |
2191 | * the stored pointed. | |
2192 | */ | |
2193 | void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config) | |
2194 | { | |
2195 | if (!sm) | |
2196 | return; | |
2197 | ||
6fc6879b | 2198 | if (config) { |
886a807f | 2199 | sm->network_ctx = config->network_ctx; |
6fc6879b JM |
2200 | sm->peerkey_enabled = config->peerkey_enabled; |
2201 | sm->allowed_pairwise_cipher = config->allowed_pairwise_cipher; | |
2202 | sm->proactive_key_caching = config->proactive_key_caching; | |
2203 | sm->eap_workaround = config->eap_workaround; | |
2204 | sm->eap_conf_ctx = config->eap_conf_ctx; | |
2205 | if (config->ssid) { | |
2206 | os_memcpy(sm->ssid, config->ssid, config->ssid_len); | |
2207 | sm->ssid_len = config->ssid_len; | |
2208 | } else | |
2209 | sm->ssid_len = 0; | |
581a8cde | 2210 | sm->wpa_ptk_rekey = config->wpa_ptk_rekey; |
6fc6879b | 2211 | } else { |
886a807f | 2212 | sm->network_ctx = NULL; |
6fc6879b JM |
2213 | sm->peerkey_enabled = 0; |
2214 | sm->allowed_pairwise_cipher = 0; | |
2215 | sm->proactive_key_caching = 0; | |
2216 | sm->eap_workaround = 0; | |
2217 | sm->eap_conf_ctx = NULL; | |
2218 | sm->ssid_len = 0; | |
581a8cde | 2219 | sm->wpa_ptk_rekey = 0; |
6fc6879b | 2220 | } |
6fc6879b JM |
2221 | } |
2222 | ||
2223 | ||
2224 | /** | |
2225 | * wpa_sm_set_own_addr - Set own MAC address | |
2226 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2227 | * @addr: Own MAC address | |
2228 | */ | |
2229 | void wpa_sm_set_own_addr(struct wpa_sm *sm, const u8 *addr) | |
2230 | { | |
2231 | if (sm) | |
2232 | os_memcpy(sm->own_addr, addr, ETH_ALEN); | |
2233 | } | |
2234 | ||
2235 | ||
2236 | /** | |
2237 | * wpa_sm_set_ifname - Set network interface name | |
2238 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2239 | * @ifname: Interface name | |
2240 | * @bridge_ifname: Optional bridge interface name (for pre-auth) | |
2241 | */ | |
2242 | void wpa_sm_set_ifname(struct wpa_sm *sm, const char *ifname, | |
2243 | const char *bridge_ifname) | |
2244 | { | |
2245 | if (sm) { | |
2246 | sm->ifname = ifname; | |
2247 | sm->bridge_ifname = bridge_ifname; | |
2248 | } | |
2249 | } | |
2250 | ||
2251 | ||
2252 | /** | |
2253 | * wpa_sm_set_eapol - Set EAPOL state machine pointer | |
2254 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2255 | * @eapol: Pointer to EAPOL state machine allocated with eapol_sm_init() | |
2256 | */ | |
2257 | void wpa_sm_set_eapol(struct wpa_sm *sm, struct eapol_sm *eapol) | |
2258 | { | |
2259 | if (sm) | |
2260 | sm->eapol = eapol; | |
2261 | } | |
2262 | ||
2263 | ||
2264 | /** | |
2265 | * wpa_sm_set_param - Set WPA state machine parameters | |
2266 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2267 | * @param: Parameter field | |
2268 | * @value: Parameter value | |
2269 | * Returns: 0 on success, -1 on failure | |
2270 | */ | |
2271 | int wpa_sm_set_param(struct wpa_sm *sm, enum wpa_sm_conf_params param, | |
2272 | unsigned int value) | |
2273 | { | |
2274 | int ret = 0; | |
2275 | ||
2276 | if (sm == NULL) | |
2277 | return -1; | |
2278 | ||
2279 | switch (param) { | |
2280 | case RSNA_PMK_LIFETIME: | |
2281 | if (value > 0) | |
2282 | sm->dot11RSNAConfigPMKLifetime = value; | |
2283 | else | |
2284 | ret = -1; | |
2285 | break; | |
2286 | case RSNA_PMK_REAUTH_THRESHOLD: | |
2287 | if (value > 0 && value <= 100) | |
2288 | sm->dot11RSNAConfigPMKReauthThreshold = value; | |
2289 | else | |
2290 | ret = -1; | |
2291 | break; | |
2292 | case RSNA_SA_TIMEOUT: | |
2293 | if (value > 0) | |
2294 | sm->dot11RSNAConfigSATimeout = value; | |
2295 | else | |
2296 | ret = -1; | |
2297 | break; | |
2298 | case WPA_PARAM_PROTO: | |
2299 | sm->proto = value; | |
2300 | break; | |
2301 | case WPA_PARAM_PAIRWISE: | |
2302 | sm->pairwise_cipher = value; | |
2303 | break; | |
2304 | case WPA_PARAM_GROUP: | |
2305 | sm->group_cipher = value; | |
2306 | break; | |
2307 | case WPA_PARAM_KEY_MGMT: | |
2308 | sm->key_mgmt = value; | |
2309 | break; | |
2310 | #ifdef CONFIG_IEEE80211W | |
2311 | case WPA_PARAM_MGMT_GROUP: | |
2312 | sm->mgmt_group_cipher = value; | |
2313 | break; | |
2314 | #endif /* CONFIG_IEEE80211W */ | |
2315 | case WPA_PARAM_RSN_ENABLED: | |
2316 | sm->rsn_enabled = value; | |
2317 | break; | |
e820cf95 JM |
2318 | case WPA_PARAM_MFP: |
2319 | sm->mfp = value; | |
2320 | break; | |
6fc6879b JM |
2321 | default: |
2322 | break; | |
2323 | } | |
2324 | ||
2325 | return ret; | |
2326 | } | |
2327 | ||
2328 | ||
2329 | /** | |
2330 | * wpa_sm_get_param - Get WPA state machine parameters | |
2331 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2332 | * @param: Parameter field | |
2333 | * Returns: Parameter value | |
2334 | */ | |
2335 | unsigned int wpa_sm_get_param(struct wpa_sm *sm, enum wpa_sm_conf_params param) | |
2336 | { | |
2337 | if (sm == NULL) | |
2338 | return 0; | |
2339 | ||
2340 | switch (param) { | |
2341 | case RSNA_PMK_LIFETIME: | |
2342 | return sm->dot11RSNAConfigPMKLifetime; | |
2343 | case RSNA_PMK_REAUTH_THRESHOLD: | |
2344 | return sm->dot11RSNAConfigPMKReauthThreshold; | |
2345 | case RSNA_SA_TIMEOUT: | |
2346 | return sm->dot11RSNAConfigSATimeout; | |
2347 | case WPA_PARAM_PROTO: | |
2348 | return sm->proto; | |
2349 | case WPA_PARAM_PAIRWISE: | |
2350 | return sm->pairwise_cipher; | |
2351 | case WPA_PARAM_GROUP: | |
2352 | return sm->group_cipher; | |
2353 | case WPA_PARAM_KEY_MGMT: | |
2354 | return sm->key_mgmt; | |
2355 | #ifdef CONFIG_IEEE80211W | |
2356 | case WPA_PARAM_MGMT_GROUP: | |
2357 | return sm->mgmt_group_cipher; | |
2358 | #endif /* CONFIG_IEEE80211W */ | |
2359 | case WPA_PARAM_RSN_ENABLED: | |
2360 | return sm->rsn_enabled; | |
2361 | default: | |
2362 | return 0; | |
2363 | } | |
2364 | } | |
2365 | ||
2366 | ||
2367 | /** | |
2368 | * wpa_sm_get_status - Get WPA state machine | |
2369 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2370 | * @buf: Buffer for status information | |
2371 | * @buflen: Maximum buffer length | |
2372 | * @verbose: Whether to include verbose status information | |
2373 | * Returns: Number of bytes written to buf. | |
2374 | * | |
2375 | * Query WPA state machine for status information. This function fills in | |
2376 | * a text area with current status information. If the buffer (buf) is not | |
2377 | * large enough, status information will be truncated to fit the buffer. | |
2378 | */ | |
2379 | int wpa_sm_get_status(struct wpa_sm *sm, char *buf, size_t buflen, | |
2380 | int verbose) | |
2381 | { | |
2382 | char *pos = buf, *end = buf + buflen; | |
2383 | int ret; | |
2384 | ||
2385 | ret = os_snprintf(pos, end - pos, | |
2386 | "pairwise_cipher=%s\n" | |
2387 | "group_cipher=%s\n" | |
2388 | "key_mgmt=%s\n", | |
2389 | wpa_cipher_txt(sm->pairwise_cipher), | |
2390 | wpa_cipher_txt(sm->group_cipher), | |
2391 | wpa_key_mgmt_txt(sm->key_mgmt, sm->proto)); | |
2392 | if (ret < 0 || ret >= end - pos) | |
2393 | return pos - buf; | |
2394 | pos += ret; | |
13e1d2e2 JM |
2395 | |
2396 | if (sm->mfp != NO_MGMT_FRAME_PROTECTION && sm->ap_rsn_ie) { | |
2397 | struct wpa_ie_data rsn; | |
2398 | if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) | |
2399 | >= 0 && | |
2400 | rsn.capabilities & (WPA_CAPABILITY_MFPR | | |
2401 | WPA_CAPABILITY_MFPC)) { | |
2402 | ret = os_snprintf(pos, end - pos, "pmf=%d\n", | |
2403 | (rsn.capabilities & | |
2404 | WPA_CAPABILITY_MFPR) ? 2 : 1); | |
2405 | if (ret < 0 || ret >= end - pos) | |
2406 | return pos - buf; | |
2407 | pos += ret; | |
2408 | } | |
2409 | } | |
2410 | ||
6fc6879b JM |
2411 | return pos - buf; |
2412 | } | |
2413 | ||
2414 | ||
2415 | /** | |
2416 | * wpa_sm_set_assoc_wpa_ie_default - Generate own WPA/RSN IE from configuration | |
2417 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2418 | * @wpa_ie: Pointer to buffer for WPA/RSN IE | |
2419 | * @wpa_ie_len: Pointer to the length of the wpa_ie buffer | |
2420 | * Returns: 0 on success, -1 on failure | |
2421 | */ | |
2422 | int wpa_sm_set_assoc_wpa_ie_default(struct wpa_sm *sm, u8 *wpa_ie, | |
2423 | size_t *wpa_ie_len) | |
2424 | { | |
2425 | int res; | |
2426 | ||
2427 | if (sm == NULL) | |
2428 | return -1; | |
2429 | ||
2430 | res = wpa_gen_wpa_ie(sm, wpa_ie, *wpa_ie_len); | |
2431 | if (res < 0) | |
2432 | return -1; | |
2433 | *wpa_ie_len = res; | |
2434 | ||
2435 | wpa_hexdump(MSG_DEBUG, "WPA: Set own WPA IE default", | |
2436 | wpa_ie, *wpa_ie_len); | |
2437 | ||
2438 | if (sm->assoc_wpa_ie == NULL) { | |
2439 | /* | |
2440 | * Make a copy of the WPA/RSN IE so that 4-Way Handshake gets | |
2441 | * the correct version of the IE even if PMKSA caching is | |
2442 | * aborted (which would remove PMKID from IE generation). | |
2443 | */ | |
2444 | sm->assoc_wpa_ie = os_malloc(*wpa_ie_len); | |
2445 | if (sm->assoc_wpa_ie == NULL) | |
2446 | return -1; | |
2447 | ||
2448 | os_memcpy(sm->assoc_wpa_ie, wpa_ie, *wpa_ie_len); | |
2449 | sm->assoc_wpa_ie_len = *wpa_ie_len; | |
2450 | } | |
2451 | ||
2452 | return 0; | |
2453 | } | |
2454 | ||
2455 | ||
2456 | /** | |
2457 | * wpa_sm_set_assoc_wpa_ie - Set own WPA/RSN IE from (Re)AssocReq | |
2458 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2459 | * @ie: Pointer to IE data (starting from id) | |
2460 | * @len: IE length | |
2461 | * Returns: 0 on success, -1 on failure | |
2462 | * | |
2463 | * Inform WPA state machine about the WPA/RSN IE used in (Re)Association | |
2464 | * Request frame. The IE will be used to override the default value generated | |
2465 | * with wpa_sm_set_assoc_wpa_ie_default(). | |
2466 | */ | |
2467 | int wpa_sm_set_assoc_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len) | |
2468 | { | |
2469 | if (sm == NULL) | |
2470 | return -1; | |
2471 | ||
2472 | os_free(sm->assoc_wpa_ie); | |
2473 | if (ie == NULL || len == 0) { | |
f049052b BG |
2474 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2475 | "WPA: clearing own WPA/RSN IE"); | |
6fc6879b JM |
2476 | sm->assoc_wpa_ie = NULL; |
2477 | sm->assoc_wpa_ie_len = 0; | |
2478 | } else { | |
2479 | wpa_hexdump(MSG_DEBUG, "WPA: set own WPA/RSN IE", ie, len); | |
2480 | sm->assoc_wpa_ie = os_malloc(len); | |
2481 | if (sm->assoc_wpa_ie == NULL) | |
2482 | return -1; | |
2483 | ||
2484 | os_memcpy(sm->assoc_wpa_ie, ie, len); | |
2485 | sm->assoc_wpa_ie_len = len; | |
2486 | } | |
2487 | ||
2488 | return 0; | |
2489 | } | |
2490 | ||
2491 | ||
2492 | /** | |
2493 | * wpa_sm_set_ap_wpa_ie - Set AP WPA IE from Beacon/ProbeResp | |
2494 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2495 | * @ie: Pointer to IE data (starting from id) | |
2496 | * @len: IE length | |
2497 | * Returns: 0 on success, -1 on failure | |
2498 | * | |
2499 | * Inform WPA state machine about the WPA IE used in Beacon / Probe Response | |
2500 | * frame. | |
2501 | */ | |
2502 | int wpa_sm_set_ap_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len) | |
2503 | { | |
2504 | if (sm == NULL) | |
2505 | return -1; | |
2506 | ||
2507 | os_free(sm->ap_wpa_ie); | |
2508 | if (ie == NULL || len == 0) { | |
f049052b BG |
2509 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2510 | "WPA: clearing AP WPA IE"); | |
6fc6879b JM |
2511 | sm->ap_wpa_ie = NULL; |
2512 | sm->ap_wpa_ie_len = 0; | |
2513 | } else { | |
2514 | wpa_hexdump(MSG_DEBUG, "WPA: set AP WPA IE", ie, len); | |
2515 | sm->ap_wpa_ie = os_malloc(len); | |
2516 | if (sm->ap_wpa_ie == NULL) | |
2517 | return -1; | |
2518 | ||
2519 | os_memcpy(sm->ap_wpa_ie, ie, len); | |
2520 | sm->ap_wpa_ie_len = len; | |
2521 | } | |
2522 | ||
2523 | return 0; | |
2524 | } | |
2525 | ||
2526 | ||
2527 | /** | |
2528 | * wpa_sm_set_ap_rsn_ie - Set AP RSN IE from Beacon/ProbeResp | |
2529 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2530 | * @ie: Pointer to IE data (starting from id) | |
2531 | * @len: IE length | |
2532 | * Returns: 0 on success, -1 on failure | |
2533 | * | |
2534 | * Inform WPA state machine about the RSN IE used in Beacon / Probe Response | |
2535 | * frame. | |
2536 | */ | |
2537 | int wpa_sm_set_ap_rsn_ie(struct wpa_sm *sm, const u8 *ie, size_t len) | |
2538 | { | |
2539 | if (sm == NULL) | |
2540 | return -1; | |
2541 | ||
2542 | os_free(sm->ap_rsn_ie); | |
2543 | if (ie == NULL || len == 0) { | |
f049052b BG |
2544 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2545 | "WPA: clearing AP RSN IE"); | |
6fc6879b JM |
2546 | sm->ap_rsn_ie = NULL; |
2547 | sm->ap_rsn_ie_len = 0; | |
2548 | } else { | |
2549 | wpa_hexdump(MSG_DEBUG, "WPA: set AP RSN IE", ie, len); | |
2550 | sm->ap_rsn_ie = os_malloc(len); | |
2551 | if (sm->ap_rsn_ie == NULL) | |
2552 | return -1; | |
2553 | ||
2554 | os_memcpy(sm->ap_rsn_ie, ie, len); | |
2555 | sm->ap_rsn_ie_len = len; | |
2556 | } | |
2557 | ||
2558 | return 0; | |
2559 | } | |
2560 | ||
2561 | ||
2562 | /** | |
2563 | * wpa_sm_parse_own_wpa_ie - Parse own WPA/RSN IE | |
2564 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2565 | * @data: Pointer to data area for parsing results | |
2566 | * Returns: 0 on success, -1 if IE is not known, or -2 on parsing failure | |
2567 | * | |
2568 | * Parse the contents of the own WPA or RSN IE from (Re)AssocReq and write the | |
2569 | * parsed data into data. | |
2570 | */ | |
2571 | int wpa_sm_parse_own_wpa_ie(struct wpa_sm *sm, struct wpa_ie_data *data) | |
2572 | { | |
2a522e71 JM |
2573 | if (sm == NULL) |
2574 | return -1; | |
2575 | ||
2576 | if (sm->assoc_wpa_ie == NULL) { | |
f049052b BG |
2577 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2578 | "WPA: No WPA/RSN IE available from association info"); | |
6fc6879b JM |
2579 | return -1; |
2580 | } | |
2581 | if (wpa_parse_wpa_ie(sm->assoc_wpa_ie, sm->assoc_wpa_ie_len, data)) | |
2582 | return -2; | |
2583 | return 0; | |
2584 | } | |
540264a7 JM |
2585 | |
2586 | ||
2587 | int wpa_sm_pmksa_cache_list(struct wpa_sm *sm, char *buf, size_t len) | |
2588 | { | |
2589 | #ifndef CONFIG_NO_WPA2 | |
2590 | return pmksa_cache_list(sm->pmksa, buf, len); | |
2591 | #else /* CONFIG_NO_WPA2 */ | |
2592 | return -1; | |
2593 | #endif /* CONFIG_NO_WPA2 */ | |
2594 | } | |
32d5295f JM |
2595 | |
2596 | ||
2597 | void wpa_sm_drop_sa(struct wpa_sm *sm) | |
2598 | { | |
f049052b | 2599 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PMK and PTK"); |
32d5295f JM |
2600 | sm->ptk_set = 0; |
2601 | sm->tptk_set = 0; | |
2602 | os_memset(sm->pmk, 0, sizeof(sm->pmk)); | |
2603 | os_memset(&sm->ptk, 0, sizeof(sm->ptk)); | |
2604 | os_memset(&sm->tptk, 0, sizeof(sm->tptk)); | |
2605 | } | |
0d7b4409 JM |
2606 | |
2607 | ||
2608 | int wpa_sm_has_ptk(struct wpa_sm *sm) | |
2609 | { | |
2610 | if (sm == NULL) | |
2611 | return 0; | |
2612 | return sm->ptk_set; | |
2613 | } | |
b14a210c JB |
2614 | |
2615 | ||
2616 | void wpa_sm_update_replay_ctr(struct wpa_sm *sm, const u8 *replay_ctr) | |
2617 | { | |
2618 | os_memcpy(sm->rx_replay_counter, replay_ctr, WPA_REPLAY_COUNTER_LEN); | |
2619 | } | |
d8a790b9 JM |
2620 | |
2621 | ||
2622 | void wpa_sm_pmksa_cache_flush(struct wpa_sm *sm, void *network_ctx) | |
2623 | { | |
2624 | #ifndef CONFIG_NO_WPA2 | |
2625 | pmksa_cache_flush(sm->pmksa, network_ctx); | |
2626 | #endif /* CONFIG_NO_WPA2 */ | |
2627 | } | |
75cad1a0 XC |
2628 | |
2629 | ||
2630 | #ifdef CONFIG_IEEE80211V | |
2631 | int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 subelem_id, u8 *buf) | |
2632 | { | |
2633 | struct wpa_gtk_data gd; | |
2634 | #ifdef CONFIG_IEEE80211W | |
2635 | struct wpa_igtk_kde igd; | |
2636 | u16 keyidx; | |
2637 | #endif /* CONFIG_IEEE80211W */ | |
2638 | u16 keyinfo; | |
2639 | u8 keylen; /* plaintext key len */ | |
2640 | u8 keydatalen; | |
2641 | u8 *key_rsc; | |
2642 | ||
2643 | os_memset(&gd, 0, sizeof(gd)); | |
2644 | #ifdef CONFIG_IEEE80211W | |
2645 | os_memset(&igd, 0, sizeof(igd)); | |
2646 | #endif /* CONFIG_IEEE80211W */ | |
2647 | ||
c3550295 JM |
2648 | keylen = wpa_cipher_key_len(sm->group_cipher); |
2649 | gd.key_rsc_len = wpa_cipher_rsc_len(sm->group_cipher); | |
2650 | gd.alg = wpa_cipher_to_alg(sm->group_cipher); | |
2651 | if (gd.alg == WPA_ALG_NONE) { | |
75cad1a0 XC |
2652 | wpa_printf(MSG_DEBUG, "Unsupported group cipher suite"); |
2653 | return -1; | |
2654 | } | |
2655 | ||
2656 | if (subelem_id == WNM_SLEEP_SUBELEM_GTK) { | |
2657 | key_rsc = buf + 5; | |
2658 | keyinfo = WPA_GET_LE16(buf+2); | |
2659 | keydatalen = buf[1] - 11 - 8; | |
2660 | gd.gtk_len = keylen; | |
2661 | if (gd.gtk_len != buf[4]) { | |
2662 | wpa_printf(MSG_DEBUG, "GTK len mismatch len %d vs %d", | |
2663 | gd.gtk_len, buf[4]); | |
2664 | return -1; | |
2665 | } | |
2666 | gd.keyidx = keyinfo & 0x03; /* B0 - B1 */ | |
2667 | gd.tx = wpa_supplicant_gtk_tx_bit_workaround( | |
2668 | sm, !!(keyinfo & WPA_KEY_INFO_TXRX)); | |
2669 | ||
2670 | if (keydatalen % 8) { | |
2671 | wpa_printf(MSG_DEBUG, "WPA: Unsupported AES-WRAP len " | |
2672 | "%d", keydatalen); | |
2673 | return -1; | |
2674 | } | |
2675 | ||
2676 | if (aes_unwrap(sm->ptk.kek, keydatalen / 8, buf + 13, gd.gtk)) | |
2677 | { | |
2678 | wpa_printf(MSG_WARNING, "WNM: AES unwrap failed - " | |
2679 | "could not decrypt GTK"); | |
2680 | return -1; | |
2681 | } | |
2682 | ||
2683 | wpa_hexdump_key(MSG_DEBUG, "Install GTK (WNM SLEEP)", | |
2684 | gd.gtk, gd.gtk_len); | |
2685 | if (wpa_supplicant_install_gtk(sm, &gd, key_rsc)) { | |
2686 | wpa_printf(MSG_DEBUG, "Failed to install the GTK in " | |
2687 | "WNM mode"); | |
2688 | return -1; | |
2689 | } | |
2690 | #ifdef CONFIG_IEEE80211W | |
2691 | } else if (subelem_id == WNM_SLEEP_SUBELEM_IGTK) { | |
2692 | if (buf[1] != 2 + 6 + WPA_IGTK_LEN + 8) { | |
2693 | wpa_printf(MSG_DEBUG, "WPA: Unsupported AES-WRAP len " | |
2694 | "%d", buf[1] - 2 - 6 - 8); | |
2695 | return -1; | |
2696 | } | |
2697 | os_memcpy(igd.keyid, buf + 2, 2); | |
2698 | os_memcpy(igd.pn, buf + 4, 6); | |
2699 | ||
2700 | keyidx = WPA_GET_LE16(igd.keyid); | |
2701 | ||
2702 | if (aes_unwrap(sm->ptk.kek, WPA_IGTK_LEN / 8, buf + 10, | |
2703 | igd.igtk)) { | |
2704 | wpa_printf(MSG_WARNING, "WNM: AES unwrap failed - " | |
2705 | "could not decrypr IGTK"); | |
2706 | return -1; | |
2707 | } | |
2708 | ||
2709 | wpa_hexdump_key(MSG_DEBUG, "Install IGTK (WNM SLEEP)", | |
2710 | igd.igtk, WPA_IGTK_LEN); | |
2711 | if (wpa_sm_set_key(sm, WPA_ALG_IGTK, broadcast_ether_addr, | |
2712 | keyidx, 0, igd.pn, sizeof(igd.pn), | |
2713 | igd.igtk, WPA_IGTK_LEN) < 0) { | |
2714 | wpa_printf(MSG_DEBUG, "Failed to install the IGTK in " | |
2715 | "WNM mode"); | |
2716 | return -1; | |
2717 | } | |
2718 | #endif /* CONFIG_IEEE80211W */ | |
2719 | } else { | |
2720 | wpa_printf(MSG_DEBUG, "Unknown element id"); | |
2721 | return -1; | |
2722 | } | |
2723 | ||
2724 | return 0; | |
2725 | } | |
2726 | #endif /* CONFIG_IEEE80211V */ |