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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 JM |
93 | ver = WPA_KEY_INFO_TYPE_AES_128_CMAC; |
94 | else if (sm->pairwise_cipher == WPA_CIPHER_CCMP) | |
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) { | |
193 | wpa_hexdump_key(MSG_DEBUG, "WPA: PMK from EAPOL state " | |
194 | "machines", sm->pmk, pmk_len); | |
195 | sm->pmk_len = pmk_len; | |
715ed737 HW |
196 | if (sm->proto == WPA_PROTO_RSN && |
197 | !wpa_key_mgmt_ft(sm->key_mgmt)) { | |
f5a51b58 JM |
198 | pmksa_cache_add(sm->pmksa, sm->pmk, pmk_len, |
199 | src_addr, sm->own_addr, | |
200 | sm->network_ctx, sm->key_mgmt); | |
201 | } | |
6fc6879b | 202 | if (!sm->cur_pmksa && pmkid && |
96efeeb6 JM |
203 | pmksa_cache_get(sm->pmksa, src_addr, pmkid, NULL)) |
204 | { | |
f049052b BG |
205 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
206 | "RSN: the new PMK matches with the " | |
207 | "PMKID"); | |
6fc6879b JM |
208 | abort_cached = 0; |
209 | } | |
210 | } else { | |
0f057fb2 | 211 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
6fc6879b | 212 | "WPA: Failed to get master session key from " |
f049052b BG |
213 | "EAPOL state machines - key handshake " |
214 | "aborted"); | |
6fc6879b | 215 | if (sm->cur_pmksa) { |
f049052b BG |
216 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
217 | "RSN: Cancelled PMKSA caching " | |
218 | "attempt"); | |
6fc6879b JM |
219 | sm->cur_pmksa = NULL; |
220 | abort_cached = 1; | |
1ac2d4a9 | 221 | } else if (!abort_cached) { |
6fc6879b JM |
222 | return -1; |
223 | } | |
224 | } | |
225 | } | |
226 | ||
715ed737 HW |
227 | if (abort_cached && wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) && |
228 | !wpa_key_mgmt_ft(sm->key_mgmt)) { | |
6fc6879b JM |
229 | /* Send EAPOL-Start to trigger full EAP authentication. */ |
230 | u8 *buf; | |
231 | size_t buflen; | |
232 | ||
f049052b BG |
233 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
234 | "RSN: no PMKSA entry found - trigger " | |
235 | "full EAP authentication"); | |
6fc6879b JM |
236 | buf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_START, |
237 | NULL, 0, &buflen, NULL); | |
238 | if (buf) { | |
239 | wpa_sm_ether_send(sm, sm->bssid, ETH_P_EAPOL, | |
240 | buf, buflen); | |
241 | os_free(buf); | |
b4a1256d | 242 | return -2; |
6fc6879b JM |
243 | } |
244 | ||
245 | return -1; | |
246 | } | |
247 | ||
248 | return 0; | |
249 | } | |
250 | ||
251 | ||
252 | /** | |
253 | * wpa_supplicant_send_2_of_4 - Send message 2 of WPA/RSN 4-Way Handshake | |
254 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
255 | * @dst: Destination address for the frame | |
256 | * @key: Pointer to the EAPOL-Key frame header | |
257 | * @ver: Version bits from EAPOL-Key Key Info | |
258 | * @nonce: Nonce value for the EAPOL-Key frame | |
259 | * @wpa_ie: WPA/RSN IE | |
260 | * @wpa_ie_len: Length of the WPA/RSN IE | |
261 | * @ptk: PTK to use for keyed hash and encryption | |
262 | * Returns: 0 on success, -1 on failure | |
263 | */ | |
264 | int wpa_supplicant_send_2_of_4(struct wpa_sm *sm, const unsigned char *dst, | |
265 | const struct wpa_eapol_key *key, | |
266 | int ver, const u8 *nonce, | |
267 | const u8 *wpa_ie, size_t wpa_ie_len, | |
268 | struct wpa_ptk *ptk) | |
269 | { | |
270 | size_t rlen; | |
271 | struct wpa_eapol_key *reply; | |
272 | u8 *rbuf; | |
26e23750 | 273 | u8 *rsn_ie_buf = NULL; |
6fc6879b JM |
274 | |
275 | if (wpa_ie == NULL) { | |
f049052b BG |
276 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No wpa_ie set - " |
277 | "cannot generate msg 2/4"); | |
6fc6879b JM |
278 | return -1; |
279 | } | |
280 | ||
26e23750 JM |
281 | #ifdef CONFIG_IEEE80211R |
282 | if (wpa_key_mgmt_ft(sm->key_mgmt)) { | |
283 | int res; | |
284 | ||
55046414 JM |
285 | /* |
286 | * Add PMKR1Name into RSN IE (PMKID-List) and add MDIE and | |
287 | * FTIE from (Re)Association Response. | |
288 | */ | |
289 | rsn_ie_buf = os_malloc(wpa_ie_len + 2 + 2 + PMKID_LEN + | |
290 | sm->assoc_resp_ies_len); | |
26e23750 JM |
291 | if (rsn_ie_buf == NULL) |
292 | return -1; | |
293 | os_memcpy(rsn_ie_buf, wpa_ie, wpa_ie_len); | |
294 | res = wpa_insert_pmkid(rsn_ie_buf, wpa_ie_len, | |
295 | sm->pmk_r1_name); | |
296 | if (res < 0) { | |
297 | os_free(rsn_ie_buf); | |
298 | return -1; | |
299 | } | |
55046414 JM |
300 | wpa_ie_len += res; |
301 | ||
302 | if (sm->assoc_resp_ies) { | |
303 | os_memcpy(rsn_ie_buf + wpa_ie_len, sm->assoc_resp_ies, | |
304 | sm->assoc_resp_ies_len); | |
305 | wpa_ie_len += sm->assoc_resp_ies_len; | |
306 | } | |
26e23750 JM |
307 | |
308 | wpa_ie = rsn_ie_buf; | |
26e23750 JM |
309 | } |
310 | #endif /* CONFIG_IEEE80211R */ | |
311 | ||
6fc6879b JM |
312 | wpa_hexdump(MSG_DEBUG, "WPA: WPA IE for msg 2/4", wpa_ie, wpa_ie_len); |
313 | ||
314 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, | |
315 | NULL, sizeof(*reply) + wpa_ie_len, | |
316 | &rlen, (void *) &reply); | |
26e23750 JM |
317 | if (rbuf == NULL) { |
318 | os_free(rsn_ie_buf); | |
6fc6879b | 319 | return -1; |
26e23750 | 320 | } |
6fc6879b JM |
321 | |
322 | reply->type = sm->proto == WPA_PROTO_RSN ? | |
323 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; | |
324 | WPA_PUT_BE16(reply->key_info, | |
325 | ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_MIC); | |
326 | if (sm->proto == WPA_PROTO_RSN) | |
327 | WPA_PUT_BE16(reply->key_length, 0); | |
328 | else | |
329 | os_memcpy(reply->key_length, key->key_length, 2); | |
330 | os_memcpy(reply->replay_counter, key->replay_counter, | |
331 | WPA_REPLAY_COUNTER_LEN); | |
bc8318ac JM |
332 | wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter", reply->replay_counter, |
333 | WPA_REPLAY_COUNTER_LEN); | |
6fc6879b JM |
334 | |
335 | WPA_PUT_BE16(reply->key_data_length, wpa_ie_len); | |
336 | os_memcpy(reply + 1, wpa_ie, wpa_ie_len); | |
26e23750 | 337 | os_free(rsn_ie_buf); |
6fc6879b JM |
338 | |
339 | os_memcpy(reply->key_nonce, nonce, WPA_NONCE_LEN); | |
340 | ||
f049052b | 341 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/4"); |
6fc6879b JM |
342 | wpa_eapol_key_send(sm, ptk->kck, ver, dst, ETH_P_EAPOL, |
343 | rbuf, rlen, reply->key_mic); | |
344 | ||
345 | return 0; | |
346 | } | |
347 | ||
348 | ||
349 | static int wpa_derive_ptk(struct wpa_sm *sm, const unsigned char *src_addr, | |
350 | const struct wpa_eapol_key *key, | |
351 | struct wpa_ptk *ptk) | |
352 | { | |
c0a61908 | 353 | size_t ptk_len = sm->pairwise_cipher == WPA_CIPHER_CCMP ? 48 : 64; |
6fc6879b | 354 | #ifdef CONFIG_IEEE80211R |
56586197 | 355 | if (wpa_key_mgmt_ft(sm->key_mgmt)) |
c0a61908 | 356 | return wpa_derive_ptk_ft(sm, src_addr, key, ptk, ptk_len); |
6fc6879b JM |
357 | #endif /* CONFIG_IEEE80211R */ |
358 | ||
359 | wpa_pmk_to_ptk(sm->pmk, sm->pmk_len, "Pairwise key expansion", | |
360 | sm->own_addr, sm->bssid, sm->snonce, key->key_nonce, | |
c0a61908 | 361 | (u8 *) ptk, ptk_len, |
56586197 | 362 | wpa_key_mgmt_sha256(sm->key_mgmt)); |
6fc6879b JM |
363 | return 0; |
364 | } | |
365 | ||
366 | ||
367 | static void wpa_supplicant_process_1_of_4(struct wpa_sm *sm, | |
368 | const unsigned char *src_addr, | |
369 | const struct wpa_eapol_key *key, | |
370 | u16 ver) | |
371 | { | |
372 | struct wpa_eapol_ie_parse ie; | |
373 | struct wpa_ptk *ptk; | |
374 | u8 buf[8]; | |
b4a1256d | 375 | int res; |
6fc6879b JM |
376 | |
377 | if (wpa_sm_get_network_ctx(sm) == NULL) { | |
f049052b BG |
378 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No SSID info " |
379 | "found (msg 1 of 4)"); | |
6fc6879b JM |
380 | return; |
381 | } | |
382 | ||
383 | wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE); | |
f049052b BG |
384 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of 4-Way " |
385 | "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver); | |
6fc6879b JM |
386 | |
387 | os_memset(&ie, 0, sizeof(ie)); | |
388 | ||
389 | #ifndef CONFIG_NO_WPA2 | |
390 | if (sm->proto == WPA_PROTO_RSN) { | |
391 | /* RSN: msg 1/4 should contain PMKID for the selected PMK */ | |
392 | const u8 *_buf = (const u8 *) (key + 1); | |
393 | size_t len = WPA_GET_BE16(key->key_data_length); | |
394 | wpa_hexdump(MSG_DEBUG, "RSN: msg 1/4 key data", _buf, len); | |
d627a939 JM |
395 | if (wpa_supplicant_parse_ies(_buf, len, &ie) < 0) |
396 | goto failed; | |
6fc6879b JM |
397 | if (ie.pmkid) { |
398 | wpa_hexdump(MSG_DEBUG, "RSN: PMKID from " | |
399 | "Authenticator", ie.pmkid, PMKID_LEN); | |
400 | } | |
401 | } | |
402 | #endif /* CONFIG_NO_WPA2 */ | |
403 | ||
b4a1256d JM |
404 | res = wpa_supplicant_get_pmk(sm, src_addr, ie.pmkid); |
405 | if (res == -2) { | |
f049052b BG |
406 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: Do not reply to " |
407 | "msg 1/4 - requesting full EAP authentication"); | |
b4a1256d JM |
408 | return; |
409 | } | |
410 | if (res) | |
83935317 | 411 | goto failed; |
6fc6879b JM |
412 | |
413 | if (sm->renew_snonce) { | |
3642c431 | 414 | if (random_get_bytes(sm->snonce, WPA_NONCE_LEN)) { |
0f057fb2 | 415 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
6fc6879b | 416 | "WPA: Failed to get random data for SNonce"); |
83935317 | 417 | goto failed; |
6fc6879b JM |
418 | } |
419 | sm->renew_snonce = 0; | |
420 | wpa_hexdump(MSG_DEBUG, "WPA: Renewed SNonce", | |
421 | sm->snonce, WPA_NONCE_LEN); | |
422 | } | |
423 | ||
424 | /* Calculate PTK which will be stored as a temporary PTK until it has | |
425 | * been verified when processing message 3/4. */ | |
426 | ptk = &sm->tptk; | |
427 | wpa_derive_ptk(sm, src_addr, key, ptk); | |
428 | /* Supplicant: swap tx/rx Mic keys */ | |
429 | os_memcpy(buf, ptk->u.auth.tx_mic_key, 8); | |
430 | os_memcpy(ptk->u.auth.tx_mic_key, ptk->u.auth.rx_mic_key, 8); | |
431 | os_memcpy(ptk->u.auth.rx_mic_key, buf, 8); | |
432 | sm->tptk_set = 1; | |
433 | ||
434 | if (wpa_supplicant_send_2_of_4(sm, sm->bssid, key, ver, sm->snonce, | |
435 | sm->assoc_wpa_ie, sm->assoc_wpa_ie_len, | |
436 | ptk)) | |
83935317 | 437 | goto failed; |
6fc6879b JM |
438 | |
439 | os_memcpy(sm->anonce, key->key_nonce, WPA_NONCE_LEN); | |
83935317 JM |
440 | return; |
441 | ||
442 | failed: | |
443 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); | |
6fc6879b JM |
444 | } |
445 | ||
446 | ||
447 | static void wpa_sm_start_preauth(void *eloop_ctx, void *timeout_ctx) | |
448 | { | |
449 | struct wpa_sm *sm = eloop_ctx; | |
450 | rsn_preauth_candidate_process(sm); | |
451 | } | |
452 | ||
453 | ||
454 | static void wpa_supplicant_key_neg_complete(struct wpa_sm *sm, | |
455 | const u8 *addr, int secure) | |
456 | { | |
0f057fb2 JM |
457 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
458 | "WPA: Key negotiation completed with " | |
6fc6879b JM |
459 | MACSTR " [PTK=%s GTK=%s]", MAC2STR(addr), |
460 | wpa_cipher_txt(sm->pairwise_cipher), | |
461 | wpa_cipher_txt(sm->group_cipher)); | |
6fc6879b JM |
462 | wpa_sm_cancel_auth_timeout(sm); |
463 | wpa_sm_set_state(sm, WPA_COMPLETED); | |
464 | ||
465 | if (secure) { | |
466 | wpa_sm_mlme_setprotection( | |
467 | sm, addr, MLME_SETPROTECTION_PROTECT_TYPE_RX_TX, | |
468 | MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); | |
469 | eapol_sm_notify_portValid(sm->eapol, TRUE); | |
56586197 | 470 | if (wpa_key_mgmt_wpa_psk(sm->key_mgmt)) |
6fc6879b JM |
471 | eapol_sm_notify_eap_success(sm->eapol, TRUE); |
472 | /* | |
473 | * Start preauthentication after a short wait to avoid a | |
474 | * possible race condition between the data receive and key | |
475 | * configuration after the 4-Way Handshake. This increases the | |
ffbf1eaa | 476 | * likelihood of the first preauth EAPOL-Start frame getting to |
6fc6879b JM |
477 | * the target AP. |
478 | */ | |
479 | eloop_register_timeout(1, 0, wpa_sm_start_preauth, sm, NULL); | |
480 | } | |
481 | ||
482 | if (sm->cur_pmksa && sm->cur_pmksa->opportunistic) { | |
f049052b BG |
483 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
484 | "RSN: Authenticator accepted " | |
485 | "opportunistic PMKSA entry - marking it valid"); | |
6fc6879b JM |
486 | sm->cur_pmksa->opportunistic = 0; |
487 | } | |
488 | ||
489 | #ifdef CONFIG_IEEE80211R | |
56586197 | 490 | if (wpa_key_mgmt_ft(sm->key_mgmt)) { |
6fc6879b | 491 | /* Prepare for the next transition */ |
76b7981d | 492 | wpa_ft_prepare_auth_request(sm, NULL); |
6fc6879b JM |
493 | } |
494 | #endif /* CONFIG_IEEE80211R */ | |
495 | } | |
496 | ||
497 | ||
581a8cde JM |
498 | static void wpa_sm_rekey_ptk(void *eloop_ctx, void *timeout_ctx) |
499 | { | |
500 | struct wpa_sm *sm = eloop_ctx; | |
f049052b | 501 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Request PTK rekeying"); |
581a8cde JM |
502 | wpa_sm_key_request(sm, 0, 1); |
503 | } | |
504 | ||
505 | ||
6fc6879b JM |
506 | static int wpa_supplicant_install_ptk(struct wpa_sm *sm, |
507 | const struct wpa_eapol_key *key) | |
508 | { | |
509 | int keylen, rsclen; | |
71934751 | 510 | enum wpa_alg alg; |
6fc6879b JM |
511 | const u8 *key_rsc; |
512 | u8 null_rsc[8] = { 0, 0, 0, 0, 0, 0, 0, 0 }; | |
513 | ||
f049052b BG |
514 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
515 | "WPA: Installing PTK to the driver"); | |
6fc6879b JM |
516 | |
517 | switch (sm->pairwise_cipher) { | |
518 | case WPA_CIPHER_CCMP: | |
519 | alg = WPA_ALG_CCMP; | |
520 | keylen = 16; | |
521 | rsclen = 6; | |
522 | break; | |
523 | case WPA_CIPHER_TKIP: | |
524 | alg = WPA_ALG_TKIP; | |
525 | keylen = 32; | |
526 | rsclen = 6; | |
527 | break; | |
528 | case WPA_CIPHER_NONE: | |
f049052b BG |
529 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Pairwise Cipher " |
530 | "Suite: NONE - do not use pairwise keys"); | |
6fc6879b JM |
531 | return 0; |
532 | default: | |
f049052b BG |
533 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
534 | "WPA: Unsupported pairwise cipher %d", | |
535 | sm->pairwise_cipher); | |
6fc6879b JM |
536 | return -1; |
537 | } | |
538 | ||
539 | if (sm->proto == WPA_PROTO_RSN) { | |
540 | key_rsc = null_rsc; | |
541 | } else { | |
542 | key_rsc = key->key_rsc; | |
543 | wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, rsclen); | |
544 | } | |
545 | ||
546 | if (wpa_sm_set_key(sm, alg, sm->bssid, 0, 1, key_rsc, rsclen, | |
547 | (u8 *) sm->ptk.tk1, keylen) < 0) { | |
f049052b BG |
548 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
549 | "WPA: Failed to set PTK to the " | |
550 | "driver (alg=%d keylen=%d bssid=" MACSTR ")", | |
551 | alg, keylen, MAC2STR(sm->bssid)); | |
6fc6879b JM |
552 | return -1; |
553 | } | |
581a8cde JM |
554 | |
555 | if (sm->wpa_ptk_rekey) { | |
556 | eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); | |
557 | eloop_register_timeout(sm->wpa_ptk_rekey, 0, wpa_sm_rekey_ptk, | |
558 | sm, NULL); | |
559 | } | |
560 | ||
6fc6879b JM |
561 | return 0; |
562 | } | |
563 | ||
564 | ||
f049052b BG |
565 | static int wpa_supplicant_check_group_cipher(struct wpa_sm *sm, |
566 | int group_cipher, | |
6fc6879b | 567 | int keylen, int maxkeylen, |
71934751 JM |
568 | int *key_rsc_len, |
569 | enum wpa_alg *alg) | |
6fc6879b JM |
570 | { |
571 | int ret = 0; | |
572 | ||
573 | switch (group_cipher) { | |
574 | case WPA_CIPHER_CCMP: | |
575 | if (keylen != 16 || maxkeylen < 16) { | |
576 | ret = -1; | |
577 | break; | |
578 | } | |
579 | *key_rsc_len = 6; | |
580 | *alg = WPA_ALG_CCMP; | |
581 | break; | |
582 | case WPA_CIPHER_TKIP: | |
583 | if (keylen != 32 || maxkeylen < 32) { | |
584 | ret = -1; | |
585 | break; | |
586 | } | |
587 | *key_rsc_len = 6; | |
588 | *alg = WPA_ALG_TKIP; | |
589 | break; | |
590 | case WPA_CIPHER_WEP104: | |
591 | if (keylen != 13 || maxkeylen < 13) { | |
592 | ret = -1; | |
593 | break; | |
594 | } | |
595 | *key_rsc_len = 0; | |
596 | *alg = WPA_ALG_WEP; | |
597 | break; | |
598 | case WPA_CIPHER_WEP40: | |
599 | if (keylen != 5 || maxkeylen < 5) { | |
600 | ret = -1; | |
601 | break; | |
602 | } | |
603 | *key_rsc_len = 0; | |
604 | *alg = WPA_ALG_WEP; | |
605 | break; | |
606 | default: | |
f049052b BG |
607 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
608 | "WPA: Unsupported Group Cipher %d", | |
609 | group_cipher); | |
6fc6879b JM |
610 | return -1; |
611 | } | |
612 | ||
613 | if (ret < 0 ) { | |
f049052b BG |
614 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
615 | "WPA: Unsupported %s Group Cipher key length %d (%d)", | |
616 | wpa_cipher_txt(group_cipher), keylen, maxkeylen); | |
6fc6879b JM |
617 | } |
618 | ||
619 | return ret; | |
620 | } | |
621 | ||
622 | ||
623 | struct wpa_gtk_data { | |
71934751 | 624 | enum wpa_alg alg; |
6fc6879b JM |
625 | int tx, key_rsc_len, keyidx; |
626 | u8 gtk[32]; | |
627 | int gtk_len; | |
628 | }; | |
629 | ||
630 | ||
631 | static int wpa_supplicant_install_gtk(struct wpa_sm *sm, | |
632 | const struct wpa_gtk_data *gd, | |
633 | const u8 *key_rsc) | |
634 | { | |
635 | const u8 *_gtk = gd->gtk; | |
636 | u8 gtk_buf[32]; | |
637 | ||
638 | wpa_hexdump_key(MSG_DEBUG, "WPA: Group Key", gd->gtk, gd->gtk_len); | |
f049052b BG |
639 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
640 | "WPA: Installing GTK to the driver (keyidx=%d tx=%d len=%d)", | |
641 | gd->keyidx, gd->tx, gd->gtk_len); | |
6fc6879b JM |
642 | wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, gd->key_rsc_len); |
643 | if (sm->group_cipher == WPA_CIPHER_TKIP) { | |
644 | /* Swap Tx/Rx keys for Michael MIC */ | |
645 | os_memcpy(gtk_buf, gd->gtk, 16); | |
646 | os_memcpy(gtk_buf + 16, gd->gtk + 24, 8); | |
647 | os_memcpy(gtk_buf + 24, gd->gtk + 16, 8); | |
648 | _gtk = gtk_buf; | |
649 | } | |
650 | if (sm->pairwise_cipher == WPA_CIPHER_NONE) { | |
0382097e | 651 | if (wpa_sm_set_key(sm, gd->alg, NULL, |
6fc6879b JM |
652 | gd->keyidx, 1, key_rsc, gd->key_rsc_len, |
653 | _gtk, gd->gtk_len) < 0) { | |
f049052b BG |
654 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
655 | "WPA: Failed to set GTK to the driver " | |
656 | "(Group only)"); | |
6fc6879b JM |
657 | return -1; |
658 | } | |
0382097e | 659 | } else if (wpa_sm_set_key(sm, gd->alg, broadcast_ether_addr, |
6fc6879b JM |
660 | gd->keyidx, gd->tx, key_rsc, gd->key_rsc_len, |
661 | _gtk, gd->gtk_len) < 0) { | |
f049052b BG |
662 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
663 | "WPA: Failed to set GTK to " | |
664 | "the driver (alg=%d keylen=%d keyidx=%d)", | |
665 | gd->alg, gd->gtk_len, gd->keyidx); | |
6fc6879b JM |
666 | return -1; |
667 | } | |
668 | ||
669 | return 0; | |
670 | } | |
671 | ||
672 | ||
673 | static int wpa_supplicant_gtk_tx_bit_workaround(const struct wpa_sm *sm, | |
674 | int tx) | |
675 | { | |
676 | if (tx && sm->pairwise_cipher != WPA_CIPHER_NONE) { | |
677 | /* Ignore Tx bit for GTK if a pairwise key is used. One AP | |
678 | * seemed to set this bit (incorrectly, since Tx is only when | |
679 | * doing Group Key only APs) and without this workaround, the | |
680 | * data connection does not work because wpa_supplicant | |
681 | * configured non-zero keyidx to be used for unicast. */ | |
f049052b BG |
682 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
683 | "WPA: Tx bit set for GTK, but pairwise " | |
684 | "keys are used - ignore Tx bit"); | |
6fc6879b JM |
685 | return 0; |
686 | } | |
687 | return tx; | |
688 | } | |
689 | ||
690 | ||
691 | static int wpa_supplicant_pairwise_gtk(struct wpa_sm *sm, | |
692 | const struct wpa_eapol_key *key, | |
693 | const u8 *gtk, size_t gtk_len, | |
694 | int key_info) | |
695 | { | |
696 | #ifndef CONFIG_NO_WPA2 | |
697 | struct wpa_gtk_data gd; | |
698 | ||
699 | /* | |
700 | * IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames - Figure 43x | |
701 | * GTK KDE format: | |
702 | * KeyID[bits 0-1], Tx [bit 2], Reserved [bits 3-7] | |
703 | * Reserved [bits 0-7] | |
704 | * GTK | |
705 | */ | |
706 | ||
707 | os_memset(&gd, 0, sizeof(gd)); | |
708 | wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in pairwise handshake", | |
709 | gtk, gtk_len); | |
710 | ||
711 | if (gtk_len < 2 || gtk_len - 2 > sizeof(gd.gtk)) | |
712 | return -1; | |
713 | ||
714 | gd.keyidx = gtk[0] & 0x3; | |
715 | gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm, | |
716 | !!(gtk[0] & BIT(2))); | |
717 | gtk += 2; | |
718 | gtk_len -= 2; | |
719 | ||
720 | os_memcpy(gd.gtk, gtk, gtk_len); | |
721 | gd.gtk_len = gtk_len; | |
722 | ||
f049052b | 723 | if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, |
6fc6879b JM |
724 | gtk_len, gtk_len, |
725 | &gd.key_rsc_len, &gd.alg) || | |
726 | wpa_supplicant_install_gtk(sm, &gd, key->key_rsc)) { | |
f049052b BG |
727 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
728 | "RSN: Failed to install GTK"); | |
6fc6879b JM |
729 | return -1; |
730 | } | |
731 | ||
732 | wpa_supplicant_key_neg_complete(sm, sm->bssid, | |
733 | key_info & WPA_KEY_INFO_SECURE); | |
734 | return 0; | |
735 | #else /* CONFIG_NO_WPA2 */ | |
736 | return -1; | |
737 | #endif /* CONFIG_NO_WPA2 */ | |
738 | } | |
739 | ||
740 | ||
741 | static int ieee80211w_set_keys(struct wpa_sm *sm, | |
742 | struct wpa_eapol_ie_parse *ie) | |
743 | { | |
744 | #ifdef CONFIG_IEEE80211W | |
745 | if (sm->mgmt_group_cipher != WPA_CIPHER_AES_128_CMAC) | |
746 | return 0; | |
747 | ||
748 | if (ie->igtk) { | |
749 | const struct wpa_igtk_kde *igtk; | |
750 | u16 keyidx; | |
751 | if (ie->igtk_len != sizeof(*igtk)) | |
752 | return -1; | |
753 | igtk = (const struct wpa_igtk_kde *) ie->igtk; | |
754 | keyidx = WPA_GET_LE16(igtk->keyid); | |
f049052b BG |
755 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: IGTK keyid %d " |
756 | "pn %02x%02x%02x%02x%02x%02x", | |
757 | keyidx, MAC2STR(igtk->pn)); | |
6fc6879b JM |
758 | wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK", |
759 | igtk->igtk, WPA_IGTK_LEN); | |
760 | if (keyidx > 4095) { | |
f049052b BG |
761 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
762 | "WPA: Invalid IGTK KeyID %d", keyidx); | |
6fc6879b JM |
763 | return -1; |
764 | } | |
0382097e | 765 | if (wpa_sm_set_key(sm, WPA_ALG_IGTK, broadcast_ether_addr, |
6fc6879b JM |
766 | keyidx, 0, igtk->pn, sizeof(igtk->pn), |
767 | igtk->igtk, WPA_IGTK_LEN) < 0) { | |
f049052b BG |
768 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
769 | "WPA: Failed to configure IGTK to the driver"); | |
6fc6879b JM |
770 | return -1; |
771 | } | |
772 | } | |
773 | ||
774 | return 0; | |
775 | #else /* CONFIG_IEEE80211W */ | |
776 | return 0; | |
777 | #endif /* CONFIG_IEEE80211W */ | |
778 | } | |
779 | ||
780 | ||
781 | static void wpa_report_ie_mismatch(struct wpa_sm *sm, | |
782 | const char *reason, const u8 *src_addr, | |
783 | const u8 *wpa_ie, size_t wpa_ie_len, | |
784 | const u8 *rsn_ie, size_t rsn_ie_len) | |
785 | { | |
0f057fb2 | 786 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: %s (src=" MACSTR ")", |
6fc6879b JM |
787 | reason, MAC2STR(src_addr)); |
788 | ||
789 | if (sm->ap_wpa_ie) { | |
790 | wpa_hexdump(MSG_INFO, "WPA: WPA IE in Beacon/ProbeResp", | |
791 | sm->ap_wpa_ie, sm->ap_wpa_ie_len); | |
792 | } | |
793 | if (wpa_ie) { | |
794 | if (!sm->ap_wpa_ie) { | |
f049052b BG |
795 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
796 | "WPA: No WPA IE in Beacon/ProbeResp"); | |
6fc6879b JM |
797 | } |
798 | wpa_hexdump(MSG_INFO, "WPA: WPA IE in 3/4 msg", | |
799 | wpa_ie, wpa_ie_len); | |
800 | } | |
801 | ||
802 | if (sm->ap_rsn_ie) { | |
803 | wpa_hexdump(MSG_INFO, "WPA: RSN IE in Beacon/ProbeResp", | |
804 | sm->ap_rsn_ie, sm->ap_rsn_ie_len); | |
805 | } | |
806 | if (rsn_ie) { | |
807 | if (!sm->ap_rsn_ie) { | |
f049052b BG |
808 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
809 | "WPA: No RSN IE in Beacon/ProbeResp"); | |
6fc6879b JM |
810 | } |
811 | wpa_hexdump(MSG_INFO, "WPA: RSN IE in 3/4 msg", | |
812 | rsn_ie, rsn_ie_len); | |
813 | } | |
814 | ||
815 | wpa_sm_disassociate(sm, WLAN_REASON_IE_IN_4WAY_DIFFERS); | |
6fc6879b JM |
816 | } |
817 | ||
818 | ||
5af8187e JM |
819 | #ifdef CONFIG_IEEE80211R |
820 | ||
821 | static int ft_validate_mdie(struct wpa_sm *sm, | |
822 | const unsigned char *src_addr, | |
3b4f6dac JM |
823 | struct wpa_eapol_ie_parse *ie, |
824 | const u8 *assoc_resp_mdie) | |
5af8187e JM |
825 | { |
826 | struct rsn_mdie *mdie; | |
827 | ||
5af8187e JM |
828 | mdie = (struct rsn_mdie *) (ie->mdie + 2); |
829 | if (ie->mdie == NULL || ie->mdie_len < 2 + sizeof(*mdie) || | |
830 | os_memcmp(mdie->mobility_domain, sm->mobility_domain, | |
831 | MOBILITY_DOMAIN_ID_LEN) != 0) { | |
f049052b BG |
832 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE in msg 3/4 did " |
833 | "not match with the current mobility domain"); | |
5af8187e JM |
834 | return -1; |
835 | } | |
836 | ||
3b4f6dac JM |
837 | if (assoc_resp_mdie && |
838 | (assoc_resp_mdie[1] != ie->mdie[1] || | |
839 | os_memcmp(assoc_resp_mdie, ie->mdie, 2 + ie->mdie[1]) != 0)) { | |
f049052b | 840 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE mismatch"); |
3b4f6dac JM |
841 | wpa_hexdump(MSG_DEBUG, "FT: MDIE in EAPOL-Key msg 3/4", |
842 | ie->mdie, 2 + ie->mdie[1]); | |
843 | wpa_hexdump(MSG_DEBUG, "FT: MDIE in (Re)Association Response", | |
844 | assoc_resp_mdie, 2 + assoc_resp_mdie[1]); | |
845 | return -1; | |
846 | } | |
847 | ||
848 | return 0; | |
849 | } | |
850 | ||
851 | ||
852 | static int ft_validate_ftie(struct wpa_sm *sm, | |
853 | const unsigned char *src_addr, | |
854 | struct wpa_eapol_ie_parse *ie, | |
855 | const u8 *assoc_resp_ftie) | |
856 | { | |
857 | if (ie->ftie == NULL) { | |
f049052b BG |
858 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
859 | "FT: No FTIE in EAPOL-Key msg 3/4"); | |
3b4f6dac JM |
860 | return -1; |
861 | } | |
862 | ||
863 | if (assoc_resp_ftie == NULL) | |
864 | return 0; | |
865 | ||
866 | if (assoc_resp_ftie[1] != ie->ftie[1] || | |
867 | os_memcmp(assoc_resp_ftie, ie->ftie, 2 + ie->ftie[1]) != 0) { | |
f049052b | 868 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: FTIE mismatch"); |
3b4f6dac JM |
869 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 3/4", |
870 | ie->ftie, 2 + ie->ftie[1]); | |
871 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)Association Response", | |
872 | assoc_resp_ftie, 2 + assoc_resp_ftie[1]); | |
873 | return -1; | |
874 | } | |
875 | ||
5af8187e JM |
876 | return 0; |
877 | } | |
878 | ||
879 | ||
880 | static int ft_validate_rsnie(struct wpa_sm *sm, | |
881 | const unsigned char *src_addr, | |
882 | struct wpa_eapol_ie_parse *ie) | |
883 | { | |
884 | struct wpa_ie_data rsn; | |
885 | ||
886 | if (!ie->rsn_ie) | |
887 | return 0; | |
888 | ||
889 | /* | |
890 | * Verify that PMKR1Name from EAPOL-Key message 3/4 | |
891 | * matches with the value we derived. | |
892 | */ | |
893 | if (wpa_parse_wpa_ie_rsn(ie->rsn_ie, ie->rsn_ie_len, &rsn) < 0 || | |
894 | rsn.num_pmkid != 1 || rsn.pmkid == NULL) { | |
f049052b BG |
895 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: No PMKR1Name in " |
896 | "FT 4-way handshake message 3/4"); | |
5af8187e JM |
897 | return -1; |
898 | } | |
899 | ||
900 | if (os_memcmp(rsn.pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0) { | |
f049052b BG |
901 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
902 | "FT: PMKR1Name mismatch in " | |
903 | "FT 4-way handshake message 3/4"); | |
5af8187e JM |
904 | wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Authenticator", |
905 | rsn.pmkid, WPA_PMK_NAME_LEN); | |
906 | wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name", | |
907 | sm->pmk_r1_name, WPA_PMK_NAME_LEN); | |
908 | return -1; | |
909 | } | |
910 | ||
911 | return 0; | |
912 | } | |
913 | ||
914 | ||
915 | static int wpa_supplicant_validate_ie_ft(struct wpa_sm *sm, | |
916 | const unsigned char *src_addr, | |
917 | struct wpa_eapol_ie_parse *ie) | |
918 | { | |
3b4f6dac JM |
919 | const u8 *pos, *end, *mdie = NULL, *ftie = NULL; |
920 | ||
921 | if (sm->assoc_resp_ies) { | |
922 | pos = sm->assoc_resp_ies; | |
923 | end = pos + sm->assoc_resp_ies_len; | |
924 | while (pos + 2 < end) { | |
925 | if (pos + 2 + pos[1] > end) | |
926 | break; | |
927 | switch (*pos) { | |
928 | case WLAN_EID_MOBILITY_DOMAIN: | |
929 | mdie = pos; | |
930 | break; | |
931 | case WLAN_EID_FAST_BSS_TRANSITION: | |
932 | ftie = pos; | |
933 | break; | |
934 | } | |
935 | pos += 2 + pos[1]; | |
936 | } | |
937 | } | |
938 | ||
939 | if (ft_validate_mdie(sm, src_addr, ie, mdie) < 0 || | |
940 | ft_validate_ftie(sm, src_addr, ie, ftie) < 0 || | |
5af8187e JM |
941 | ft_validate_rsnie(sm, src_addr, ie) < 0) |
942 | return -1; | |
943 | ||
944 | return 0; | |
945 | } | |
946 | ||
947 | #endif /* CONFIG_IEEE80211R */ | |
948 | ||
949 | ||
6fc6879b JM |
950 | static int wpa_supplicant_validate_ie(struct wpa_sm *sm, |
951 | const unsigned char *src_addr, | |
952 | struct wpa_eapol_ie_parse *ie) | |
953 | { | |
954 | if (sm->ap_wpa_ie == NULL && sm->ap_rsn_ie == NULL) { | |
f049052b BG |
955 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
956 | "WPA: No WPA/RSN IE for this AP known. " | |
957 | "Trying to get from scan results"); | |
6fc6879b | 958 | if (wpa_sm_get_beacon_ie(sm) < 0) { |
f049052b BG |
959 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
960 | "WPA: Could not find AP from " | |
961 | "the scan results"); | |
6fc6879b | 962 | } else { |
f049052b BG |
963 | wpa_msg(sm->ctx->msg_ctx, MSG_DEBUG, |
964 | "WPA: Found the current AP from " | |
965 | "updated scan results"); | |
6fc6879b JM |
966 | } |
967 | } | |
968 | ||
969 | if (ie->wpa_ie == NULL && ie->rsn_ie == NULL && | |
970 | (sm->ap_wpa_ie || sm->ap_rsn_ie)) { | |
971 | wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " | |
972 | "with IE in Beacon/ProbeResp (no IE?)", | |
973 | src_addr, ie->wpa_ie, ie->wpa_ie_len, | |
974 | ie->rsn_ie, ie->rsn_ie_len); | |
975 | return -1; | |
976 | } | |
977 | ||
978 | if ((ie->wpa_ie && sm->ap_wpa_ie && | |
979 | (ie->wpa_ie_len != sm->ap_wpa_ie_len || | |
980 | os_memcmp(ie->wpa_ie, sm->ap_wpa_ie, ie->wpa_ie_len) != 0)) || | |
981 | (ie->rsn_ie && sm->ap_rsn_ie && | |
26e23750 JM |
982 | wpa_compare_rsn_ie(wpa_key_mgmt_ft(sm->key_mgmt), |
983 | sm->ap_rsn_ie, sm->ap_rsn_ie_len, | |
984 | ie->rsn_ie, ie->rsn_ie_len))) { | |
6fc6879b JM |
985 | wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " |
986 | "with IE in Beacon/ProbeResp", | |
987 | src_addr, ie->wpa_ie, ie->wpa_ie_len, | |
988 | ie->rsn_ie, ie->rsn_ie_len); | |
989 | return -1; | |
990 | } | |
991 | ||
992 | if (sm->proto == WPA_PROTO_WPA && | |
993 | ie->rsn_ie && sm->ap_rsn_ie == NULL && sm->rsn_enabled) { | |
994 | wpa_report_ie_mismatch(sm, "Possible downgrade attack " | |
995 | "detected - RSN was enabled and RSN IE " | |
996 | "was in msg 3/4, but not in " | |
997 | "Beacon/ProbeResp", | |
998 | src_addr, ie->wpa_ie, ie->wpa_ie_len, | |
999 | ie->rsn_ie, ie->rsn_ie_len); | |
1000 | return -1; | |
1001 | } | |
1002 | ||
1003 | #ifdef CONFIG_IEEE80211R | |
5af8187e JM |
1004 | if (wpa_key_mgmt_ft(sm->key_mgmt) && |
1005 | wpa_supplicant_validate_ie_ft(sm, src_addr, ie) < 0) | |
1006 | return -1; | |
6fc6879b JM |
1007 | #endif /* CONFIG_IEEE80211R */ |
1008 | ||
1009 | return 0; | |
1010 | } | |
1011 | ||
1012 | ||
1013 | /** | |
1014 | * wpa_supplicant_send_4_of_4 - Send message 4 of WPA/RSN 4-Way Handshake | |
1015 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
1016 | * @dst: Destination address for the frame | |
1017 | * @key: Pointer to the EAPOL-Key frame header | |
1018 | * @ver: Version bits from EAPOL-Key Key Info | |
1019 | * @key_info: Key Info | |
1020 | * @kde: KDEs to include the EAPOL-Key frame | |
1021 | * @kde_len: Length of KDEs | |
1022 | * @ptk: PTK to use for keyed hash and encryption | |
1023 | * Returns: 0 on success, -1 on failure | |
1024 | */ | |
1025 | int wpa_supplicant_send_4_of_4(struct wpa_sm *sm, const unsigned char *dst, | |
1026 | const struct wpa_eapol_key *key, | |
1027 | u16 ver, u16 key_info, | |
1028 | const u8 *kde, size_t kde_len, | |
1029 | struct wpa_ptk *ptk) | |
1030 | { | |
1031 | size_t rlen; | |
1032 | struct wpa_eapol_key *reply; | |
1033 | u8 *rbuf; | |
1034 | ||
1035 | if (kde) | |
1036 | wpa_hexdump(MSG_DEBUG, "WPA: KDE for msg 4/4", kde, kde_len); | |
1037 | ||
1038 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, | |
1039 | sizeof(*reply) + kde_len, | |
1040 | &rlen, (void *) &reply); | |
1041 | if (rbuf == NULL) | |
1042 | return -1; | |
1043 | ||
1044 | reply->type = sm->proto == WPA_PROTO_RSN ? | |
1045 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; | |
1046 | key_info &= WPA_KEY_INFO_SECURE; | |
1047 | key_info |= ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_MIC; | |
1048 | WPA_PUT_BE16(reply->key_info, key_info); | |
1049 | if (sm->proto == WPA_PROTO_RSN) | |
1050 | WPA_PUT_BE16(reply->key_length, 0); | |
1051 | else | |
1052 | os_memcpy(reply->key_length, key->key_length, 2); | |
1053 | os_memcpy(reply->replay_counter, key->replay_counter, | |
1054 | WPA_REPLAY_COUNTER_LEN); | |
1055 | ||
1056 | WPA_PUT_BE16(reply->key_data_length, kde_len); | |
1057 | if (kde) | |
1058 | os_memcpy(reply + 1, kde, kde_len); | |
1059 | ||
f049052b | 1060 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 4/4"); |
6fc6879b JM |
1061 | wpa_eapol_key_send(sm, ptk->kck, ver, dst, ETH_P_EAPOL, |
1062 | rbuf, rlen, reply->key_mic); | |
1063 | ||
1064 | return 0; | |
1065 | } | |
1066 | ||
1067 | ||
1068 | static void wpa_supplicant_process_3_of_4(struct wpa_sm *sm, | |
1069 | const struct wpa_eapol_key *key, | |
1070 | u16 ver) | |
1071 | { | |
1072 | u16 key_info, keylen, len; | |
1073 | const u8 *pos; | |
1074 | struct wpa_eapol_ie_parse ie; | |
1075 | ||
1076 | wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE); | |
f049052b BG |
1077 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 3 of 4-Way " |
1078 | "Handshake from " MACSTR " (ver=%d)", MAC2STR(sm->bssid), ver); | |
6fc6879b JM |
1079 | |
1080 | key_info = WPA_GET_BE16(key->key_info); | |
1081 | ||
1082 | pos = (const u8 *) (key + 1); | |
1083 | len = WPA_GET_BE16(key->key_data_length); | |
1084 | wpa_hexdump(MSG_DEBUG, "WPA: IE KeyData", pos, len); | |
d627a939 JM |
1085 | if (wpa_supplicant_parse_ies(pos, len, &ie) < 0) |
1086 | goto failed; | |
6fc6879b | 1087 | if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { |
f049052b BG |
1088 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1089 | "WPA: GTK IE in unencrypted key data"); | |
83935317 | 1090 | goto failed; |
6fc6879b JM |
1091 | } |
1092 | #ifdef CONFIG_IEEE80211W | |
1093 | if (ie.igtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { | |
f049052b BG |
1094 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1095 | "WPA: IGTK KDE in unencrypted key data"); | |
83935317 | 1096 | goto failed; |
6fc6879b JM |
1097 | } |
1098 | ||
1099 | if (ie.igtk && ie.igtk_len != sizeof(struct wpa_igtk_kde)) { | |
f049052b BG |
1100 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1101 | "WPA: Invalid IGTK KDE length %lu", | |
1102 | (unsigned long) ie.igtk_len); | |
83935317 | 1103 | goto failed; |
6fc6879b JM |
1104 | } |
1105 | #endif /* CONFIG_IEEE80211W */ | |
1106 | ||
1107 | if (wpa_supplicant_validate_ie(sm, sm->bssid, &ie) < 0) | |
83935317 | 1108 | goto failed; |
6fc6879b JM |
1109 | |
1110 | if (os_memcmp(sm->anonce, key->key_nonce, WPA_NONCE_LEN) != 0) { | |
f049052b BG |
1111 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1112 | "WPA: ANonce from message 1 of 4-Way Handshake " | |
1113 | "differs from 3 of 4-Way Handshake - drop packet (src=" | |
1114 | MACSTR ")", MAC2STR(sm->bssid)); | |
83935317 | 1115 | goto failed; |
6fc6879b JM |
1116 | } |
1117 | ||
1118 | keylen = WPA_GET_BE16(key->key_length); | |
1119 | switch (sm->pairwise_cipher) { | |
1120 | case WPA_CIPHER_CCMP: | |
1121 | if (keylen != 16) { | |
f049052b BG |
1122 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1123 | "WPA: Invalid CCMP key length %d (src=" MACSTR | |
1124 | ")", keylen, MAC2STR(sm->bssid)); | |
83935317 | 1125 | goto failed; |
6fc6879b JM |
1126 | } |
1127 | break; | |
1128 | case WPA_CIPHER_TKIP: | |
1129 | if (keylen != 32) { | |
f049052b BG |
1130 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1131 | "WPA: Invalid TKIP key length %d (src=" MACSTR | |
1132 | ")", keylen, MAC2STR(sm->bssid)); | |
83935317 | 1133 | goto failed; |
6fc6879b JM |
1134 | } |
1135 | break; | |
1136 | } | |
1137 | ||
1138 | if (wpa_supplicant_send_4_of_4(sm, sm->bssid, key, ver, key_info, | |
83935317 JM |
1139 | NULL, 0, &sm->ptk)) { |
1140 | goto failed; | |
1141 | } | |
6fc6879b JM |
1142 | |
1143 | /* SNonce was successfully used in msg 3/4, so mark it to be renewed | |
1144 | * for the next 4-Way Handshake. If msg 3 is received again, the old | |
1145 | * SNonce will still be used to avoid changing PTK. */ | |
1146 | sm->renew_snonce = 1; | |
1147 | ||
1148 | if (key_info & WPA_KEY_INFO_INSTALL) { | |
83935317 JM |
1149 | if (wpa_supplicant_install_ptk(sm, key)) |
1150 | goto failed; | |
6fc6879b JM |
1151 | } |
1152 | ||
1153 | if (key_info & WPA_KEY_INFO_SECURE) { | |
1154 | wpa_sm_mlme_setprotection( | |
1155 | sm, sm->bssid, MLME_SETPROTECTION_PROTECT_TYPE_RX, | |
1156 | MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); | |
1157 | eapol_sm_notify_portValid(sm->eapol, TRUE); | |
1158 | } | |
1159 | wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); | |
1160 | ||
1161 | if (ie.gtk && | |
1162 | wpa_supplicant_pairwise_gtk(sm, key, | |
1163 | ie.gtk, ie.gtk_len, key_info) < 0) { | |
f049052b BG |
1164 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1165 | "RSN: Failed to configure GTK"); | |
83935317 | 1166 | goto failed; |
6fc6879b JM |
1167 | } |
1168 | ||
83935317 | 1169 | if (ieee80211w_set_keys(sm, &ie) < 0) { |
f049052b BG |
1170 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1171 | "RSN: Failed to configure IGTK"); | |
83935317 JM |
1172 | goto failed; |
1173 | } | |
1174 | ||
b14a210c JB |
1175 | wpa_sm_set_rekey_offload(sm); |
1176 | ||
83935317 JM |
1177 | return; |
1178 | ||
1179 | failed: | |
1180 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); | |
6fc6879b JM |
1181 | } |
1182 | ||
1183 | ||
1184 | static int wpa_supplicant_process_1_of_2_rsn(struct wpa_sm *sm, | |
1185 | const u8 *keydata, | |
1186 | size_t keydatalen, | |
1187 | u16 key_info, | |
1188 | struct wpa_gtk_data *gd) | |
1189 | { | |
1190 | int maxkeylen; | |
1191 | struct wpa_eapol_ie_parse ie; | |
1192 | ||
1193 | wpa_hexdump(MSG_DEBUG, "RSN: msg 1/2 key data", keydata, keydatalen); | |
d627a939 JM |
1194 | if (wpa_supplicant_parse_ies(keydata, keydatalen, &ie) < 0) |
1195 | return -1; | |
6fc6879b | 1196 | if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { |
f049052b BG |
1197 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1198 | "WPA: GTK IE in unencrypted key data"); | |
6fc6879b JM |
1199 | return -1; |
1200 | } | |
1201 | if (ie.gtk == NULL) { | |
f049052b BG |
1202 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1203 | "WPA: No GTK IE in Group Key msg 1/2"); | |
6fc6879b JM |
1204 | return -1; |
1205 | } | |
1206 | maxkeylen = gd->gtk_len = ie.gtk_len - 2; | |
1207 | ||
f049052b | 1208 | if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, |
6fc6879b JM |
1209 | gd->gtk_len, maxkeylen, |
1210 | &gd->key_rsc_len, &gd->alg)) | |
1211 | return -1; | |
1212 | ||
1213 | wpa_hexdump(MSG_DEBUG, "RSN: received GTK in group key handshake", | |
1214 | ie.gtk, ie.gtk_len); | |
1215 | gd->keyidx = ie.gtk[0] & 0x3; | |
1216 | gd->tx = wpa_supplicant_gtk_tx_bit_workaround(sm, | |
1217 | !!(ie.gtk[0] & BIT(2))); | |
1218 | if (ie.gtk_len - 2 > sizeof(gd->gtk)) { | |
f049052b BG |
1219 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1220 | "RSN: Too long GTK in GTK IE (len=%lu)", | |
1221 | (unsigned long) ie.gtk_len - 2); | |
6fc6879b JM |
1222 | return -1; |
1223 | } | |
1224 | os_memcpy(gd->gtk, ie.gtk + 2, ie.gtk_len - 2); | |
1225 | ||
1226 | if (ieee80211w_set_keys(sm, &ie) < 0) | |
f049052b BG |
1227 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1228 | "RSN: Failed to configure IGTK"); | |
6fc6879b JM |
1229 | |
1230 | return 0; | |
1231 | } | |
1232 | ||
1233 | ||
1234 | static int wpa_supplicant_process_1_of_2_wpa(struct wpa_sm *sm, | |
1235 | const struct wpa_eapol_key *key, | |
1236 | size_t keydatalen, int key_info, | |
1237 | size_t extra_len, u16 ver, | |
1238 | struct wpa_gtk_data *gd) | |
1239 | { | |
1240 | size_t maxkeylen; | |
1241 | u8 ek[32]; | |
1242 | ||
1243 | gd->gtk_len = WPA_GET_BE16(key->key_length); | |
1244 | maxkeylen = keydatalen; | |
1245 | if (keydatalen > extra_len) { | |
f049052b BG |
1246 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1247 | "WPA: Truncated EAPOL-Key packet: " | |
1248 | "key_data_length=%lu > extra_len=%lu", | |
1249 | (unsigned long) keydatalen, (unsigned long) extra_len); | |
6fc6879b JM |
1250 | return -1; |
1251 | } | |
1252 | if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { | |
1253 | if (maxkeylen < 8) { | |
f049052b BG |
1254 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1255 | "WPA: Too short maxkeylen (%lu)", | |
1256 | (unsigned long) maxkeylen); | |
6fc6879b JM |
1257 | return -1; |
1258 | } | |
1259 | maxkeylen -= 8; | |
1260 | } | |
1261 | ||
f049052b | 1262 | if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, |
6fc6879b JM |
1263 | gd->gtk_len, maxkeylen, |
1264 | &gd->key_rsc_len, &gd->alg)) | |
1265 | return -1; | |
1266 | ||
1267 | gd->keyidx = (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> | |
1268 | WPA_KEY_INFO_KEY_INDEX_SHIFT; | |
1269 | if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) { | |
1270 | os_memcpy(ek, key->key_iv, 16); | |
1271 | os_memcpy(ek + 16, sm->ptk.kek, 16); | |
1272 | if (keydatalen > sizeof(gd->gtk)) { | |
f049052b BG |
1273 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1274 | "WPA: RC4 key data too long (%lu)", | |
1275 | (unsigned long) keydatalen); | |
6fc6879b JM |
1276 | return -1; |
1277 | } | |
1278 | os_memcpy(gd->gtk, key + 1, keydatalen); | |
7a215dfc | 1279 | if (rc4_skip(ek, 32, 256, gd->gtk, keydatalen)) { |
f049052b BG |
1280 | wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, |
1281 | "WPA: RC4 failed"); | |
7a215dfc JM |
1282 | return -1; |
1283 | } | |
6fc6879b JM |
1284 | } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { |
1285 | if (keydatalen % 8) { | |
f049052b BG |
1286 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1287 | "WPA: Unsupported AES-WRAP len %lu", | |
1288 | (unsigned long) keydatalen); | |
6fc6879b JM |
1289 | return -1; |
1290 | } | |
1291 | if (maxkeylen > sizeof(gd->gtk)) { | |
f049052b BG |
1292 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1293 | "WPA: AES-WRAP key data " | |
1294 | "too long (keydatalen=%lu maxkeylen=%lu)", | |
1295 | (unsigned long) keydatalen, | |
1296 | (unsigned long) maxkeylen); | |
6fc6879b JM |
1297 | return -1; |
1298 | } | |
1299 | if (aes_unwrap(sm->ptk.kek, maxkeylen / 8, | |
1300 | (const u8 *) (key + 1), gd->gtk)) { | |
f049052b BG |
1301 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1302 | "WPA: AES unwrap failed - could not decrypt " | |
1303 | "GTK"); | |
6fc6879b JM |
1304 | return -1; |
1305 | } | |
1306 | } else { | |
f049052b BG |
1307 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1308 | "WPA: Unsupported key_info type %d", ver); | |
6fc6879b JM |
1309 | return -1; |
1310 | } | |
1311 | gd->tx = wpa_supplicant_gtk_tx_bit_workaround( | |
1312 | sm, !!(key_info & WPA_KEY_INFO_TXRX)); | |
1313 | return 0; | |
1314 | } | |
1315 | ||
1316 | ||
1317 | static int wpa_supplicant_send_2_of_2(struct wpa_sm *sm, | |
1318 | const struct wpa_eapol_key *key, | |
1319 | int ver, u16 key_info) | |
1320 | { | |
1321 | size_t rlen; | |
1322 | struct wpa_eapol_key *reply; | |
1323 | u8 *rbuf; | |
1324 | ||
1325 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, | |
1326 | sizeof(*reply), &rlen, (void *) &reply); | |
1327 | if (rbuf == NULL) | |
1328 | return -1; | |
1329 | ||
1330 | reply->type = sm->proto == WPA_PROTO_RSN ? | |
1331 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; | |
1332 | key_info &= WPA_KEY_INFO_KEY_INDEX_MASK; | |
1333 | key_info |= ver | WPA_KEY_INFO_MIC | WPA_KEY_INFO_SECURE; | |
1334 | WPA_PUT_BE16(reply->key_info, key_info); | |
1335 | if (sm->proto == WPA_PROTO_RSN) | |
1336 | WPA_PUT_BE16(reply->key_length, 0); | |
1337 | else | |
1338 | os_memcpy(reply->key_length, key->key_length, 2); | |
1339 | os_memcpy(reply->replay_counter, key->replay_counter, | |
1340 | WPA_REPLAY_COUNTER_LEN); | |
1341 | ||
1342 | WPA_PUT_BE16(reply->key_data_length, 0); | |
1343 | ||
f049052b | 1344 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/2"); |
6fc6879b JM |
1345 | wpa_eapol_key_send(sm, sm->ptk.kck, ver, sm->bssid, ETH_P_EAPOL, |
1346 | rbuf, rlen, reply->key_mic); | |
1347 | ||
1348 | return 0; | |
1349 | } | |
1350 | ||
1351 | ||
1352 | static void wpa_supplicant_process_1_of_2(struct wpa_sm *sm, | |
1353 | const unsigned char *src_addr, | |
1354 | const struct wpa_eapol_key *key, | |
1355 | int extra_len, u16 ver) | |
1356 | { | |
1357 | u16 key_info, keydatalen; | |
1358 | int rekey, ret; | |
1359 | struct wpa_gtk_data gd; | |
1360 | ||
1361 | os_memset(&gd, 0, sizeof(gd)); | |
1362 | ||
1363 | rekey = wpa_sm_get_state(sm) == WPA_COMPLETED; | |
f049052b BG |
1364 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of Group Key " |
1365 | "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver); | |
6fc6879b JM |
1366 | |
1367 | key_info = WPA_GET_BE16(key->key_info); | |
1368 | keydatalen = WPA_GET_BE16(key->key_data_length); | |
1369 | ||
1370 | if (sm->proto == WPA_PROTO_RSN) { | |
1371 | ret = wpa_supplicant_process_1_of_2_rsn(sm, | |
1372 | (const u8 *) (key + 1), | |
1373 | keydatalen, key_info, | |
1374 | &gd); | |
1375 | } else { | |
1376 | ret = wpa_supplicant_process_1_of_2_wpa(sm, key, keydatalen, | |
1377 | key_info, extra_len, | |
1378 | ver, &gd); | |
1379 | } | |
1380 | ||
1381 | wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); | |
1382 | ||
1383 | if (ret) | |
83935317 | 1384 | goto failed; |
6fc6879b JM |
1385 | |
1386 | if (wpa_supplicant_install_gtk(sm, &gd, key->key_rsc) || | |
1387 | wpa_supplicant_send_2_of_2(sm, key, ver, key_info)) | |
83935317 | 1388 | goto failed; |
6fc6879b JM |
1389 | |
1390 | if (rekey) { | |
0f057fb2 | 1391 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Group rekeying " |
6fc6879b JM |
1392 | "completed with " MACSTR " [GTK=%s]", |
1393 | MAC2STR(sm->bssid), wpa_cipher_txt(sm->group_cipher)); | |
1394 | wpa_sm_cancel_auth_timeout(sm); | |
1395 | wpa_sm_set_state(sm, WPA_COMPLETED); | |
b14a210c JB |
1396 | |
1397 | wpa_sm_set_rekey_offload(sm); | |
6fc6879b JM |
1398 | } else { |
1399 | wpa_supplicant_key_neg_complete(sm, sm->bssid, | |
1400 | key_info & | |
1401 | WPA_KEY_INFO_SECURE); | |
1402 | } | |
83935317 JM |
1403 | return; |
1404 | ||
1405 | failed: | |
1406 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); | |
6fc6879b JM |
1407 | } |
1408 | ||
1409 | ||
1410 | static int wpa_supplicant_verify_eapol_key_mic(struct wpa_sm *sm, | |
1411 | struct wpa_eapol_key *key, | |
1412 | u16 ver, | |
1413 | const u8 *buf, size_t len) | |
1414 | { | |
1415 | u8 mic[16]; | |
1416 | int ok = 0; | |
1417 | ||
1418 | os_memcpy(mic, key->key_mic, 16); | |
1419 | if (sm->tptk_set) { | |
1420 | os_memset(key->key_mic, 0, 16); | |
1421 | wpa_eapol_key_mic(sm->tptk.kck, ver, buf, len, | |
1422 | key->key_mic); | |
1423 | if (os_memcmp(mic, key->key_mic, 16) != 0) { | |
f049052b BG |
1424 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1425 | "WPA: Invalid EAPOL-Key MIC " | |
1426 | "when using TPTK - ignoring TPTK"); | |
6fc6879b JM |
1427 | } else { |
1428 | ok = 1; | |
1429 | sm->tptk_set = 0; | |
1430 | sm->ptk_set = 1; | |
1431 | os_memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk)); | |
1432 | } | |
1433 | } | |
1434 | ||
1435 | if (!ok && sm->ptk_set) { | |
1436 | os_memset(key->key_mic, 0, 16); | |
1437 | wpa_eapol_key_mic(sm->ptk.kck, ver, buf, len, | |
1438 | key->key_mic); | |
1439 | if (os_memcmp(mic, key->key_mic, 16) != 0) { | |
f049052b BG |
1440 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1441 | "WPA: Invalid EAPOL-Key MIC - " | |
1442 | "dropping packet"); | |
6fc6879b JM |
1443 | return -1; |
1444 | } | |
1445 | ok = 1; | |
1446 | } | |
1447 | ||
1448 | if (!ok) { | |
f049052b BG |
1449 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1450 | "WPA: Could not verify EAPOL-Key MIC - " | |
1451 | "dropping packet"); | |
6fc6879b JM |
1452 | return -1; |
1453 | } | |
1454 | ||
1455 | os_memcpy(sm->rx_replay_counter, key->replay_counter, | |
1456 | WPA_REPLAY_COUNTER_LEN); | |
1457 | sm->rx_replay_counter_set = 1; | |
1458 | return 0; | |
1459 | } | |
1460 | ||
1461 | ||
1462 | /* Decrypt RSN EAPOL-Key key data (RC4 or AES-WRAP) */ | |
1463 | static int wpa_supplicant_decrypt_key_data(struct wpa_sm *sm, | |
1464 | struct wpa_eapol_key *key, u16 ver) | |
1465 | { | |
1466 | u16 keydatalen = WPA_GET_BE16(key->key_data_length); | |
1467 | ||
1468 | wpa_hexdump(MSG_DEBUG, "RSN: encrypted key data", | |
1469 | (u8 *) (key + 1), keydatalen); | |
1470 | if (!sm->ptk_set) { | |
f049052b BG |
1471 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1472 | "WPA: PTK not available, cannot decrypt EAPOL-Key Key " | |
1473 | "Data"); | |
6fc6879b JM |
1474 | return -1; |
1475 | } | |
1476 | ||
1477 | /* Decrypt key data here so that this operation does not need | |
1478 | * to be implemented separately for each message type. */ | |
1479 | if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) { | |
1480 | u8 ek[32]; | |
1481 | os_memcpy(ek, key->key_iv, 16); | |
1482 | os_memcpy(ek + 16, sm->ptk.kek, 16); | |
7a215dfc | 1483 | if (rc4_skip(ek, 32, 256, (u8 *) (key + 1), keydatalen)) { |
f049052b BG |
1484 | wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, |
1485 | "WPA: RC4 failed"); | |
7a215dfc JM |
1486 | return -1; |
1487 | } | |
6fc6879b JM |
1488 | } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || |
1489 | ver == WPA_KEY_INFO_TYPE_AES_128_CMAC) { | |
1490 | u8 *buf; | |
1491 | if (keydatalen % 8) { | |
f049052b BG |
1492 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1493 | "WPA: Unsupported AES-WRAP len %d", | |
1494 | keydatalen); | |
6fc6879b JM |
1495 | return -1; |
1496 | } | |
1497 | keydatalen -= 8; /* AES-WRAP adds 8 bytes */ | |
1498 | buf = os_malloc(keydatalen); | |
1499 | if (buf == NULL) { | |
f049052b BG |
1500 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1501 | "WPA: No memory for AES-UNWRAP buffer"); | |
6fc6879b JM |
1502 | return -1; |
1503 | } | |
1504 | if (aes_unwrap(sm->ptk.kek, keydatalen / 8, | |
1505 | (u8 *) (key + 1), buf)) { | |
1506 | os_free(buf); | |
f049052b BG |
1507 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1508 | "WPA: AES unwrap failed - " | |
1509 | "could not decrypt EAPOL-Key key data"); | |
6fc6879b JM |
1510 | return -1; |
1511 | } | |
1512 | os_memcpy(key + 1, buf, keydatalen); | |
1513 | os_free(buf); | |
1514 | WPA_PUT_BE16(key->key_data_length, keydatalen); | |
1515 | } else { | |
f049052b BG |
1516 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1517 | "WPA: Unsupported key_info type %d", ver); | |
6fc6879b JM |
1518 | return -1; |
1519 | } | |
1520 | wpa_hexdump_key(MSG_DEBUG, "WPA: decrypted EAPOL-Key key data", | |
1521 | (u8 *) (key + 1), keydatalen); | |
1522 | return 0; | |
1523 | } | |
1524 | ||
1525 | ||
1526 | /** | |
1527 | * wpa_sm_aborted_cached - Notify WPA that PMKSA caching was aborted | |
1528 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
1529 | */ | |
1530 | void wpa_sm_aborted_cached(struct wpa_sm *sm) | |
1531 | { | |
1532 | if (sm && sm->cur_pmksa) { | |
f049052b BG |
1533 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1534 | "RSN: Cancelling PMKSA caching attempt"); | |
6fc6879b JM |
1535 | sm->cur_pmksa = NULL; |
1536 | } | |
1537 | } | |
1538 | ||
1539 | ||
f049052b BG |
1540 | static void wpa_eapol_key_dump(struct wpa_sm *sm, |
1541 | const struct wpa_eapol_key *key) | |
6fc6879b JM |
1542 | { |
1543 | #ifndef CONFIG_NO_STDOUT_DEBUG | |
1544 | u16 key_info = WPA_GET_BE16(key->key_info); | |
1545 | ||
f049052b BG |
1546 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, " EAPOL-Key type=%d", key->type); |
1547 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
1548 | " key_info 0x%x (ver=%d keyidx=%d rsvd=%d %s%s%s%s%s%s%s%s)", | |
1549 | key_info, key_info & WPA_KEY_INFO_TYPE_MASK, | |
1550 | (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> | |
1551 | WPA_KEY_INFO_KEY_INDEX_SHIFT, | |
1552 | (key_info & (BIT(13) | BIT(14) | BIT(15))) >> 13, | |
1553 | key_info & WPA_KEY_INFO_KEY_TYPE ? "Pairwise" : "Group", | |
1554 | key_info & WPA_KEY_INFO_INSTALL ? " Install" : "", | |
1555 | key_info & WPA_KEY_INFO_ACK ? " Ack" : "", | |
1556 | key_info & WPA_KEY_INFO_MIC ? " MIC" : "", | |
1557 | key_info & WPA_KEY_INFO_SECURE ? " Secure" : "", | |
1558 | key_info & WPA_KEY_INFO_ERROR ? " Error" : "", | |
1559 | key_info & WPA_KEY_INFO_REQUEST ? " Request" : "", | |
1560 | key_info & WPA_KEY_INFO_ENCR_KEY_DATA ? " Encr" : ""); | |
1561 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
1562 | " key_length=%u key_data_length=%u", | |
1563 | WPA_GET_BE16(key->key_length), | |
1564 | WPA_GET_BE16(key->key_data_length)); | |
6fc6879b JM |
1565 | wpa_hexdump(MSG_DEBUG, " replay_counter", |
1566 | key->replay_counter, WPA_REPLAY_COUNTER_LEN); | |
1567 | wpa_hexdump(MSG_DEBUG, " key_nonce", key->key_nonce, WPA_NONCE_LEN); | |
1568 | wpa_hexdump(MSG_DEBUG, " key_iv", key->key_iv, 16); | |
1569 | wpa_hexdump(MSG_DEBUG, " key_rsc", key->key_rsc, 8); | |
1570 | wpa_hexdump(MSG_DEBUG, " key_id (reserved)", key->key_id, 8); | |
1571 | wpa_hexdump(MSG_DEBUG, " key_mic", key->key_mic, 16); | |
1572 | #endif /* CONFIG_NO_STDOUT_DEBUG */ | |
1573 | } | |
1574 | ||
1575 | ||
1576 | /** | |
1577 | * wpa_sm_rx_eapol - Process received WPA EAPOL frames | |
1578 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
1579 | * @src_addr: Source MAC address of the EAPOL packet | |
1580 | * @buf: Pointer to the beginning of the EAPOL data (EAPOL header) | |
1581 | * @len: Length of the EAPOL frame | |
1582 | * Returns: 1 = WPA EAPOL-Key processed, 0 = not a WPA EAPOL-Key, -1 failure | |
1583 | * | |
1584 | * This function is called for each received EAPOL frame. Other than EAPOL-Key | |
1585 | * frames can be skipped if filtering is done elsewhere. wpa_sm_rx_eapol() is | |
1586 | * only processing WPA and WPA2 EAPOL-Key frames. | |
1587 | * | |
1588 | * The received EAPOL-Key packets are validated and valid packets are replied | |
1589 | * to. In addition, key material (PTK, GTK) is configured at the end of a | |
1590 | * successful key handshake. | |
1591 | */ | |
1592 | int wpa_sm_rx_eapol(struct wpa_sm *sm, const u8 *src_addr, | |
1593 | const u8 *buf, size_t len) | |
1594 | { | |
1595 | size_t plen, data_len, extra_len; | |
1596 | struct ieee802_1x_hdr *hdr; | |
1597 | struct wpa_eapol_key *key; | |
1598 | u16 key_info, ver; | |
1599 | u8 *tmp; | |
1600 | int ret = -1; | |
1601 | struct wpa_peerkey *peerkey = NULL; | |
1602 | ||
1603 | #ifdef CONFIG_IEEE80211R | |
1604 | sm->ft_completed = 0; | |
1605 | #endif /* CONFIG_IEEE80211R */ | |
1606 | ||
1607 | if (len < sizeof(*hdr) + sizeof(*key)) { | |
f049052b BG |
1608 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1609 | "WPA: EAPOL frame too short to be a WPA " | |
1610 | "EAPOL-Key (len %lu, expecting at least %lu)", | |
1611 | (unsigned long) len, | |
1612 | (unsigned long) sizeof(*hdr) + sizeof(*key)); | |
6fc6879b JM |
1613 | return 0; |
1614 | } | |
1615 | ||
1616 | tmp = os_malloc(len); | |
1617 | if (tmp == NULL) | |
1618 | return -1; | |
1619 | os_memcpy(tmp, buf, len); | |
1620 | ||
1621 | hdr = (struct ieee802_1x_hdr *) tmp; | |
1622 | key = (struct wpa_eapol_key *) (hdr + 1); | |
1623 | plen = be_to_host16(hdr->length); | |
1624 | data_len = plen + sizeof(*hdr); | |
f049052b BG |
1625 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1626 | "IEEE 802.1X RX: version=%d type=%d length=%lu", | |
1627 | hdr->version, hdr->type, (unsigned long) plen); | |
6fc6879b JM |
1628 | |
1629 | if (hdr->version < EAPOL_VERSION) { | |
1630 | /* TODO: backwards compatibility */ | |
1631 | } | |
1632 | if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) { | |
f049052b BG |
1633 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1634 | "WPA: EAPOL frame (type %u) discarded, " | |
6fc6879b JM |
1635 | "not a Key frame", hdr->type); |
1636 | ret = 0; | |
1637 | goto out; | |
1638 | } | |
1639 | if (plen > len - sizeof(*hdr) || plen < sizeof(*key)) { | |
f049052b BG |
1640 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1641 | "WPA: EAPOL frame payload size %lu " | |
1642 | "invalid (frame size %lu)", | |
1643 | (unsigned long) plen, (unsigned long) len); | |
6fc6879b JM |
1644 | ret = 0; |
1645 | goto out; | |
1646 | } | |
1647 | ||
1648 | if (key->type != EAPOL_KEY_TYPE_WPA && key->type != EAPOL_KEY_TYPE_RSN) | |
1649 | { | |
f049052b BG |
1650 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1651 | "WPA: EAPOL-Key type (%d) unknown, discarded", | |
1652 | key->type); | |
6fc6879b JM |
1653 | ret = 0; |
1654 | goto out; | |
1655 | } | |
f049052b | 1656 | wpa_eapol_key_dump(sm, key); |
6fc6879b JM |
1657 | |
1658 | eapol_sm_notify_lower_layer_success(sm->eapol, 0); | |
1659 | wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL-Key", tmp, len); | |
1660 | if (data_len < len) { | |
f049052b BG |
1661 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1662 | "WPA: ignoring %lu bytes after the IEEE 802.1X data", | |
1663 | (unsigned long) len - data_len); | |
6fc6879b JM |
1664 | } |
1665 | key_info = WPA_GET_BE16(key->key_info); | |
1666 | ver = key_info & WPA_KEY_INFO_TYPE_MASK; | |
1667 | if (ver != WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && | |
a20088e5 | 1668 | #if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W) |
6fc6879b | 1669 | ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && |
a20088e5 | 1670 | #endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */ |
6fc6879b | 1671 | ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { |
f049052b BG |
1672 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1673 | "WPA: Unsupported EAPOL-Key descriptor version %d", | |
1674 | ver); | |
6fc6879b JM |
1675 | goto out; |
1676 | } | |
1677 | ||
1678 | #ifdef CONFIG_IEEE80211R | |
56586197 | 1679 | if (wpa_key_mgmt_ft(sm->key_mgmt)) { |
6fc6879b JM |
1680 | /* IEEE 802.11r uses a new key_info type (AES-128-CMAC). */ |
1681 | if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) { | |
f049052b BG |
1682 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1683 | "FT: AP did not use AES-128-CMAC"); | |
6fc6879b JM |
1684 | goto out; |
1685 | } | |
1686 | } else | |
1687 | #endif /* CONFIG_IEEE80211R */ | |
56586197 JM |
1688 | #ifdef CONFIG_IEEE80211W |
1689 | if (wpa_key_mgmt_sha256(sm->key_mgmt)) { | |
1690 | if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) { | |
f049052b BG |
1691 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1692 | "WPA: AP did not use the " | |
1693 | "negotiated AES-128-CMAC"); | |
56586197 JM |
1694 | goto out; |
1695 | } | |
1696 | } else | |
1697 | #endif /* CONFIG_IEEE80211W */ | |
6fc6879b JM |
1698 | if (sm->pairwise_cipher == WPA_CIPHER_CCMP && |
1699 | ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { | |
f049052b BG |
1700 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1701 | "WPA: CCMP is used, but EAPOL-Key " | |
1702 | "descriptor version (%d) is not 2", ver); | |
6fc6879b JM |
1703 | if (sm->group_cipher != WPA_CIPHER_CCMP && |
1704 | !(key_info & WPA_KEY_INFO_KEY_TYPE)) { | |
1705 | /* Earlier versions of IEEE 802.11i did not explicitly | |
1706 | * require version 2 descriptor for all EAPOL-Key | |
1707 | * packets, so allow group keys to use version 1 if | |
1708 | * CCMP is not used for them. */ | |
f049052b BG |
1709 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1710 | "WPA: Backwards compatibility: allow invalid " | |
1711 | "version for non-CCMP group keys"); | |
6fc6879b JM |
1712 | } else |
1713 | goto out; | |
1714 | } | |
1715 | ||
1716 | #ifdef CONFIG_PEERKEY | |
1717 | for (peerkey = sm->peerkey; peerkey; peerkey = peerkey->next) { | |
1718 | if (os_memcmp(peerkey->addr, src_addr, ETH_ALEN) == 0) | |
1719 | break; | |
1720 | } | |
1721 | ||
1722 | if (!(key_info & WPA_KEY_INFO_SMK_MESSAGE) && peerkey) { | |
1723 | if (!peerkey->initiator && peerkey->replay_counter_set && | |
1724 | os_memcmp(key->replay_counter, peerkey->replay_counter, | |
1725 | WPA_REPLAY_COUNTER_LEN) <= 0) { | |
f049052b BG |
1726 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1727 | "RSN: EAPOL-Key Replay Counter did not " | |
1728 | "increase (STK) - dropping packet"); | |
6fc6879b JM |
1729 | goto out; |
1730 | } else if (peerkey->initiator) { | |
1731 | u8 _tmp[WPA_REPLAY_COUNTER_LEN]; | |
1732 | os_memcpy(_tmp, key->replay_counter, | |
1733 | WPA_REPLAY_COUNTER_LEN); | |
1734 | inc_byte_array(_tmp, WPA_REPLAY_COUNTER_LEN); | |
1735 | if (os_memcmp(_tmp, peerkey->replay_counter, | |
1736 | WPA_REPLAY_COUNTER_LEN) != 0) { | |
f049052b BG |
1737 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1738 | "RSN: EAPOL-Key Replay " | |
1739 | "Counter did not match (STK) - " | |
1740 | "dropping packet"); | |
6fc6879b JM |
1741 | goto out; |
1742 | } | |
1743 | } | |
1744 | } | |
1745 | ||
1746 | if (peerkey && peerkey->initiator && (key_info & WPA_KEY_INFO_ACK)) { | |
f049052b BG |
1747 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1748 | "RSN: Ack bit in key_info from STK peer"); | |
6fc6879b JM |
1749 | goto out; |
1750 | } | |
1751 | #endif /* CONFIG_PEERKEY */ | |
1752 | ||
1753 | if (!peerkey && sm->rx_replay_counter_set && | |
1754 | os_memcmp(key->replay_counter, sm->rx_replay_counter, | |
1755 | WPA_REPLAY_COUNTER_LEN) <= 0) { | |
f049052b BG |
1756 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1757 | "WPA: EAPOL-Key Replay Counter did not increase - " | |
1758 | "dropping packet"); | |
6fc6879b JM |
1759 | goto out; |
1760 | } | |
1761 | ||
1762 | if (!(key_info & (WPA_KEY_INFO_ACK | WPA_KEY_INFO_SMK_MESSAGE)) | |
1763 | #ifdef CONFIG_PEERKEY | |
1764 | && (peerkey == NULL || !peerkey->initiator) | |
1765 | #endif /* CONFIG_PEERKEY */ | |
1766 | ) { | |
f049052b BG |
1767 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1768 | "WPA: No Ack bit in key_info"); | |
6fc6879b JM |
1769 | goto out; |
1770 | } | |
1771 | ||
1772 | if (key_info & WPA_KEY_INFO_REQUEST) { | |
f049052b BG |
1773 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1774 | "WPA: EAPOL-Key with Request bit - dropped"); | |
6fc6879b JM |
1775 | goto out; |
1776 | } | |
1777 | ||
1778 | if ((key_info & WPA_KEY_INFO_MIC) && !peerkey && | |
1779 | wpa_supplicant_verify_eapol_key_mic(sm, key, ver, tmp, data_len)) | |
1780 | goto out; | |
1781 | ||
1782 | #ifdef CONFIG_PEERKEY | |
1783 | if ((key_info & WPA_KEY_INFO_MIC) && peerkey && | |
1784 | peerkey_verify_eapol_key_mic(sm, peerkey, key, ver, tmp, data_len)) | |
1785 | goto out; | |
1786 | #endif /* CONFIG_PEERKEY */ | |
1787 | ||
1788 | extra_len = data_len - sizeof(*hdr) - sizeof(*key); | |
1789 | ||
1790 | if (WPA_GET_BE16(key->key_data_length) > extra_len) { | |
0f057fb2 | 1791 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Invalid EAPOL-Key " |
6fc6879b JM |
1792 | "frame - key_data overflow (%d > %lu)", |
1793 | WPA_GET_BE16(key->key_data_length), | |
1794 | (unsigned long) extra_len); | |
1795 | goto out; | |
1796 | } | |
1797 | extra_len = WPA_GET_BE16(key->key_data_length); | |
1798 | ||
1799 | if (sm->proto == WPA_PROTO_RSN && | |
1800 | (key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { | |
1801 | if (wpa_supplicant_decrypt_key_data(sm, key, ver)) | |
1802 | goto out; | |
1803 | extra_len = WPA_GET_BE16(key->key_data_length); | |
1804 | } | |
1805 | ||
1806 | if (key_info & WPA_KEY_INFO_KEY_TYPE) { | |
1807 | if (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) { | |
f049052b BG |
1808 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1809 | "WPA: Ignored EAPOL-Key (Pairwise) with " | |
1810 | "non-zero key index"); | |
6fc6879b JM |
1811 | goto out; |
1812 | } | |
1813 | if (peerkey) { | |
1814 | /* PeerKey 4-Way Handshake */ | |
1815 | peerkey_rx_eapol_4way(sm, peerkey, key, key_info, ver); | |
1816 | } else if (key_info & WPA_KEY_INFO_MIC) { | |
1817 | /* 3/4 4-Way Handshake */ | |
1818 | wpa_supplicant_process_3_of_4(sm, key, ver); | |
1819 | } else { | |
1820 | /* 1/4 4-Way Handshake */ | |
1821 | wpa_supplicant_process_1_of_4(sm, src_addr, key, | |
1822 | ver); | |
1823 | } | |
1824 | } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) { | |
1825 | /* PeerKey SMK Handshake */ | |
1826 | peerkey_rx_eapol_smk(sm, src_addr, key, extra_len, key_info, | |
1827 | ver); | |
1828 | } else { | |
1829 | if (key_info & WPA_KEY_INFO_MIC) { | |
1830 | /* 1/2 Group Key Handshake */ | |
1831 | wpa_supplicant_process_1_of_2(sm, src_addr, key, | |
1832 | extra_len, ver); | |
1833 | } else { | |
f049052b BG |
1834 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1835 | "WPA: EAPOL-Key (Group) without Mic bit - " | |
1836 | "dropped"); | |
6fc6879b JM |
1837 | } |
1838 | } | |
1839 | ||
1840 | ret = 1; | |
1841 | ||
1842 | out: | |
1843 | os_free(tmp); | |
1844 | return ret; | |
1845 | } | |
1846 | ||
1847 | ||
1848 | #ifdef CONFIG_CTRL_IFACE | |
1849 | static int wpa_cipher_bits(int cipher) | |
1850 | { | |
1851 | switch (cipher) { | |
1852 | case WPA_CIPHER_CCMP: | |
1853 | return 128; | |
1854 | case WPA_CIPHER_TKIP: | |
1855 | return 256; | |
1856 | case WPA_CIPHER_WEP104: | |
1857 | return 104; | |
1858 | case WPA_CIPHER_WEP40: | |
1859 | return 40; | |
1860 | default: | |
1861 | return 0; | |
1862 | } | |
1863 | } | |
1864 | ||
1865 | ||
1866 | static u32 wpa_key_mgmt_suite(struct wpa_sm *sm) | |
1867 | { | |
1868 | switch (sm->key_mgmt) { | |
1869 | case WPA_KEY_MGMT_IEEE8021X: | |
1870 | return (sm->proto == WPA_PROTO_RSN ? | |
1871 | RSN_AUTH_KEY_MGMT_UNSPEC_802_1X : | |
1872 | WPA_AUTH_KEY_MGMT_UNSPEC_802_1X); | |
1873 | case WPA_KEY_MGMT_PSK: | |
1874 | return (sm->proto == WPA_PROTO_RSN ? | |
1875 | RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X : | |
1876 | WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X); | |
1877 | #ifdef CONFIG_IEEE80211R | |
1878 | case WPA_KEY_MGMT_FT_IEEE8021X: | |
1879 | return RSN_AUTH_KEY_MGMT_FT_802_1X; | |
1880 | case WPA_KEY_MGMT_FT_PSK: | |
1881 | return RSN_AUTH_KEY_MGMT_FT_PSK; | |
1882 | #endif /* CONFIG_IEEE80211R */ | |
56586197 JM |
1883 | #ifdef CONFIG_IEEE80211W |
1884 | case WPA_KEY_MGMT_IEEE8021X_SHA256: | |
1885 | return RSN_AUTH_KEY_MGMT_802_1X_SHA256; | |
1886 | case WPA_KEY_MGMT_PSK_SHA256: | |
1887 | return RSN_AUTH_KEY_MGMT_PSK_SHA256; | |
1888 | #endif /* CONFIG_IEEE80211W */ | |
6fc6879b JM |
1889 | case WPA_KEY_MGMT_WPA_NONE: |
1890 | return WPA_AUTH_KEY_MGMT_NONE; | |
1891 | default: | |
1892 | return 0; | |
1893 | } | |
1894 | } | |
1895 | ||
1896 | ||
1897 | static u32 wpa_cipher_suite(struct wpa_sm *sm, int cipher) | |
1898 | { | |
1899 | switch (cipher) { | |
1900 | case WPA_CIPHER_CCMP: | |
1901 | return (sm->proto == WPA_PROTO_RSN ? | |
1902 | RSN_CIPHER_SUITE_CCMP : WPA_CIPHER_SUITE_CCMP); | |
1903 | case WPA_CIPHER_TKIP: | |
1904 | return (sm->proto == WPA_PROTO_RSN ? | |
1905 | RSN_CIPHER_SUITE_TKIP : WPA_CIPHER_SUITE_TKIP); | |
1906 | case WPA_CIPHER_WEP104: | |
1907 | return (sm->proto == WPA_PROTO_RSN ? | |
1908 | RSN_CIPHER_SUITE_WEP104 : WPA_CIPHER_SUITE_WEP104); | |
1909 | case WPA_CIPHER_WEP40: | |
1910 | return (sm->proto == WPA_PROTO_RSN ? | |
1911 | RSN_CIPHER_SUITE_WEP40 : WPA_CIPHER_SUITE_WEP40); | |
1912 | case WPA_CIPHER_NONE: | |
1913 | return (sm->proto == WPA_PROTO_RSN ? | |
1914 | RSN_CIPHER_SUITE_NONE : WPA_CIPHER_SUITE_NONE); | |
1915 | default: | |
1916 | return 0; | |
1917 | } | |
1918 | } | |
1919 | ||
1920 | ||
1921 | #define RSN_SUITE "%02x-%02x-%02x-%d" | |
1922 | #define RSN_SUITE_ARG(s) \ | |
1923 | ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff | |
1924 | ||
1925 | /** | |
1926 | * wpa_sm_get_mib - Dump text list of MIB entries | |
1927 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
1928 | * @buf: Buffer for the list | |
1929 | * @buflen: Length of the buffer | |
1930 | * Returns: Number of bytes written to buffer | |
1931 | * | |
1932 | * This function is used fetch dot11 MIB variables. | |
1933 | */ | |
1934 | int wpa_sm_get_mib(struct wpa_sm *sm, char *buf, size_t buflen) | |
1935 | { | |
1936 | char pmkid_txt[PMKID_LEN * 2 + 1]; | |
1937 | int rsna, ret; | |
1938 | size_t len; | |
1939 | ||
1940 | if (sm->cur_pmksa) { | |
1941 | wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt), | |
1942 | sm->cur_pmksa->pmkid, PMKID_LEN); | |
1943 | } else | |
1944 | pmkid_txt[0] = '\0'; | |
1945 | ||
56586197 JM |
1946 | if ((wpa_key_mgmt_wpa_psk(sm->key_mgmt) || |
1947 | wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt)) && | |
6fc6879b JM |
1948 | sm->proto == WPA_PROTO_RSN) |
1949 | rsna = 1; | |
1950 | else | |
1951 | rsna = 0; | |
1952 | ||
1953 | ret = os_snprintf(buf, buflen, | |
1954 | "dot11RSNAOptionImplemented=TRUE\n" | |
1955 | "dot11RSNAPreauthenticationImplemented=TRUE\n" | |
1956 | "dot11RSNAEnabled=%s\n" | |
1957 | "dot11RSNAPreauthenticationEnabled=%s\n" | |
1958 | "dot11RSNAConfigVersion=%d\n" | |
1959 | "dot11RSNAConfigPairwiseKeysSupported=5\n" | |
1960 | "dot11RSNAConfigGroupCipherSize=%d\n" | |
1961 | "dot11RSNAConfigPMKLifetime=%d\n" | |
1962 | "dot11RSNAConfigPMKReauthThreshold=%d\n" | |
1963 | "dot11RSNAConfigNumberOfPTKSAReplayCounters=1\n" | |
1964 | "dot11RSNAConfigSATimeout=%d\n", | |
1965 | rsna ? "TRUE" : "FALSE", | |
1966 | rsna ? "TRUE" : "FALSE", | |
1967 | RSN_VERSION, | |
1968 | wpa_cipher_bits(sm->group_cipher), | |
1969 | sm->dot11RSNAConfigPMKLifetime, | |
1970 | sm->dot11RSNAConfigPMKReauthThreshold, | |
1971 | sm->dot11RSNAConfigSATimeout); | |
1972 | if (ret < 0 || (size_t) ret >= buflen) | |
1973 | return 0; | |
1974 | len = ret; | |
1975 | ||
1976 | ret = os_snprintf( | |
1977 | buf + len, buflen - len, | |
1978 | "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n" | |
1979 | "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n" | |
1980 | "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n" | |
1981 | "dot11RSNAPMKIDUsed=%s\n" | |
1982 | "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n" | |
1983 | "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n" | |
1984 | "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n" | |
1985 | "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n" | |
1986 | "dot11RSNA4WayHandshakeFailures=%u\n", | |
1987 | RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)), | |
1988 | RSN_SUITE_ARG(wpa_cipher_suite(sm, sm->pairwise_cipher)), | |
1989 | RSN_SUITE_ARG(wpa_cipher_suite(sm, sm->group_cipher)), | |
1990 | pmkid_txt, | |
1991 | RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)), | |
1992 | RSN_SUITE_ARG(wpa_cipher_suite(sm, sm->pairwise_cipher)), | |
1993 | RSN_SUITE_ARG(wpa_cipher_suite(sm, sm->group_cipher)), | |
1994 | sm->dot11RSNA4WayHandshakeFailures); | |
1995 | if (ret >= 0 && (size_t) ret < buflen) | |
1996 | len += ret; | |
1997 | ||
1998 | return (int) len; | |
1999 | } | |
2000 | #endif /* CONFIG_CTRL_IFACE */ | |
2001 | ||
2002 | ||
2003 | static void wpa_sm_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry, | |
2004 | void *ctx, int replace) | |
2005 | { | |
2006 | struct wpa_sm *sm = ctx; | |
2007 | ||
2008 | if (sm->cur_pmksa == entry || | |
2009 | (sm->pmk_len == entry->pmk_len && | |
2010 | os_memcmp(sm->pmk, entry->pmk, sm->pmk_len) == 0)) { | |
f049052b BG |
2011 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2012 | "RSN: removed current PMKSA entry"); | |
6fc6879b JM |
2013 | sm->cur_pmksa = NULL; |
2014 | ||
2015 | if (replace) { | |
2016 | /* A new entry is being added, so no need to | |
2017 | * deauthenticate in this case. This happens when EAP | |
2018 | * authentication is completed again (reauth or failed | |
2019 | * PMKSA caching attempt). */ | |
2020 | return; | |
2021 | } | |
2022 | ||
2023 | os_memset(sm->pmk, 0, sizeof(sm->pmk)); | |
2024 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); | |
6fc6879b JM |
2025 | } |
2026 | } | |
2027 | ||
2028 | ||
2029 | /** | |
2030 | * wpa_sm_init - Initialize WPA state machine | |
2031 | * @ctx: Context pointer for callbacks; this needs to be an allocated buffer | |
2032 | * Returns: Pointer to the allocated WPA state machine data | |
2033 | * | |
2034 | * This function is used to allocate a new WPA state machine and the returned | |
2035 | * value is passed to all WPA state machine calls. | |
2036 | */ | |
2037 | struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx) | |
2038 | { | |
2039 | struct wpa_sm *sm; | |
2040 | ||
2041 | sm = os_zalloc(sizeof(*sm)); | |
2042 | if (sm == NULL) | |
2043 | return NULL; | |
c5b26e33 | 2044 | dl_list_init(&sm->pmksa_candidates); |
6fc6879b JM |
2045 | sm->renew_snonce = 1; |
2046 | sm->ctx = ctx; | |
2047 | ||
2048 | sm->dot11RSNAConfigPMKLifetime = 43200; | |
2049 | sm->dot11RSNAConfigPMKReauthThreshold = 70; | |
2050 | sm->dot11RSNAConfigSATimeout = 60; | |
2051 | ||
2052 | sm->pmksa = pmksa_cache_init(wpa_sm_pmksa_free_cb, sm, sm); | |
2053 | if (sm->pmksa == NULL) { | |
f049052b BG |
2054 | wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, |
2055 | "RSN: PMKSA cache initialization failed"); | |
6fc6879b JM |
2056 | os_free(sm); |
2057 | return NULL; | |
2058 | } | |
2059 | ||
2060 | return sm; | |
2061 | } | |
2062 | ||
2063 | ||
2064 | /** | |
2065 | * wpa_sm_deinit - Deinitialize WPA state machine | |
2066 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2067 | */ | |
2068 | void wpa_sm_deinit(struct wpa_sm *sm) | |
2069 | { | |
2070 | if (sm == NULL) | |
2071 | return; | |
2072 | pmksa_cache_deinit(sm->pmksa); | |
2073 | eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL); | |
581a8cde | 2074 | eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); |
6fc6879b JM |
2075 | os_free(sm->assoc_wpa_ie); |
2076 | os_free(sm->ap_wpa_ie); | |
2077 | os_free(sm->ap_rsn_ie); | |
2078 | os_free(sm->ctx); | |
2079 | peerkey_deinit(sm); | |
55046414 JM |
2080 | #ifdef CONFIG_IEEE80211R |
2081 | os_free(sm->assoc_resp_ies); | |
2082 | #endif /* CONFIG_IEEE80211R */ | |
6fc6879b JM |
2083 | os_free(sm); |
2084 | } | |
2085 | ||
2086 | ||
2087 | /** | |
2088 | * wpa_sm_notify_assoc - Notify WPA state machine about association | |
2089 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2090 | * @bssid: The BSSID of the new association | |
2091 | * | |
2092 | * This function is called to let WPA state machine know that the connection | |
2093 | * was established. | |
2094 | */ | |
2095 | void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid) | |
2096 | { | |
58a98fb0 JM |
2097 | int clear_ptk = 1; |
2098 | ||
6fc6879b JM |
2099 | if (sm == NULL) |
2100 | return; | |
2101 | ||
f049052b BG |
2102 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2103 | "WPA: Association event - clear replay counter"); | |
6fc6879b JM |
2104 | os_memcpy(sm->bssid, bssid, ETH_ALEN); |
2105 | os_memset(sm->rx_replay_counter, 0, WPA_REPLAY_COUNTER_LEN); | |
2106 | sm->rx_replay_counter_set = 0; | |
2107 | sm->renew_snonce = 1; | |
2108 | if (os_memcmp(sm->preauth_bssid, bssid, ETH_ALEN) == 0) | |
2109 | rsn_preauth_deinit(sm); | |
2110 | ||
2111 | #ifdef CONFIG_IEEE80211R | |
58a98fb0 | 2112 | if (wpa_ft_is_completed(sm)) { |
5d5a9f00 JM |
2113 | /* |
2114 | * Clear portValid to kick EAPOL state machine to re-enter | |
2115 | * AUTHENTICATED state to get the EAPOL port Authorized. | |
2116 | */ | |
2117 | eapol_sm_notify_portValid(sm->eapol, FALSE); | |
6fc6879b JM |
2118 | wpa_supplicant_key_neg_complete(sm, sm->bssid, 1); |
2119 | ||
2120 | /* Prepare for the next transition */ | |
76b7981d | 2121 | wpa_ft_prepare_auth_request(sm, NULL); |
58a98fb0 JM |
2122 | |
2123 | clear_ptk = 0; | |
6fc6879b JM |
2124 | } |
2125 | #endif /* CONFIG_IEEE80211R */ | |
58a98fb0 JM |
2126 | |
2127 | if (clear_ptk) { | |
2128 | /* | |
2129 | * IEEE 802.11, 8.4.10: Delete PTK SA on (re)association if | |
2130 | * this is not part of a Fast BSS Transition. | |
2131 | */ | |
f049052b | 2132 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PTK"); |
58a98fb0 JM |
2133 | sm->ptk_set = 0; |
2134 | sm->tptk_set = 0; | |
2135 | } | |
40cf22e6 JM |
2136 | |
2137 | #ifdef CONFIG_TDLS | |
2138 | wpa_tdls_assoc(sm); | |
2139 | #endif /* CONFIG_TDLS */ | |
6fc6879b JM |
2140 | } |
2141 | ||
2142 | ||
2143 | /** | |
2144 | * wpa_sm_notify_disassoc - Notify WPA state machine about disassociation | |
2145 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2146 | * | |
2147 | * This function is called to let WPA state machine know that the connection | |
2148 | * was lost. This will abort any existing pre-authentication session. | |
2149 | */ | |
2150 | void wpa_sm_notify_disassoc(struct wpa_sm *sm) | |
2151 | { | |
2152 | rsn_preauth_deinit(sm); | |
2153 | if (wpa_sm_get_state(sm) == WPA_4WAY_HANDSHAKE) | |
2154 | sm->dot11RSNA4WayHandshakeFailures++; | |
40cf22e6 JM |
2155 | #ifdef CONFIG_TDLS |
2156 | wpa_tdls_disassoc(sm); | |
2157 | #endif /* CONFIG_TDLS */ | |
6fc6879b JM |
2158 | } |
2159 | ||
2160 | ||
2161 | /** | |
2162 | * wpa_sm_set_pmk - Set PMK | |
2163 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2164 | * @pmk: The new PMK | |
2165 | * @pmk_len: The length of the new PMK in bytes | |
2166 | * | |
2167 | * Configure the PMK for WPA state machine. | |
2168 | */ | |
2169 | void wpa_sm_set_pmk(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len) | |
2170 | { | |
2171 | if (sm == NULL) | |
2172 | return; | |
2173 | ||
2174 | sm->pmk_len = pmk_len; | |
2175 | os_memcpy(sm->pmk, pmk, pmk_len); | |
2176 | ||
2177 | #ifdef CONFIG_IEEE80211R | |
2178 | /* Set XXKey to be PSK for FT key derivation */ | |
2179 | sm->xxkey_len = pmk_len; | |
2180 | os_memcpy(sm->xxkey, pmk, pmk_len); | |
2181 | #endif /* CONFIG_IEEE80211R */ | |
2182 | } | |
2183 | ||
2184 | ||
2185 | /** | |
2186 | * wpa_sm_set_pmk_from_pmksa - Set PMK based on the current PMKSA | |
2187 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2188 | * | |
2189 | * Take the PMK from the current PMKSA into use. If no PMKSA is active, the PMK | |
2190 | * will be cleared. | |
2191 | */ | |
2192 | void wpa_sm_set_pmk_from_pmksa(struct wpa_sm *sm) | |
2193 | { | |
2194 | if (sm == NULL) | |
2195 | return; | |
2196 | ||
2197 | if (sm->cur_pmksa) { | |
2198 | sm->pmk_len = sm->cur_pmksa->pmk_len; | |
2199 | os_memcpy(sm->pmk, sm->cur_pmksa->pmk, sm->pmk_len); | |
2200 | } else { | |
2201 | sm->pmk_len = PMK_LEN; | |
2202 | os_memset(sm->pmk, 0, PMK_LEN); | |
2203 | } | |
2204 | } | |
2205 | ||
2206 | ||
2207 | /** | |
2208 | * wpa_sm_set_fast_reauth - Set fast reauthentication (EAP) enabled/disabled | |
2209 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2210 | * @fast_reauth: Whether fast reauthentication (EAP) is allowed | |
2211 | */ | |
2212 | void wpa_sm_set_fast_reauth(struct wpa_sm *sm, int fast_reauth) | |
2213 | { | |
2214 | if (sm) | |
2215 | sm->fast_reauth = fast_reauth; | |
2216 | } | |
2217 | ||
2218 | ||
2219 | /** | |
2220 | * wpa_sm_set_scard_ctx - Set context pointer for smartcard callbacks | |
2221 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2222 | * @scard_ctx: Context pointer for smartcard related callback functions | |
2223 | */ | |
2224 | void wpa_sm_set_scard_ctx(struct wpa_sm *sm, void *scard_ctx) | |
2225 | { | |
2226 | if (sm == NULL) | |
2227 | return; | |
2228 | sm->scard_ctx = scard_ctx; | |
2229 | if (sm->preauth_eapol) | |
2230 | eapol_sm_register_scard_ctx(sm->preauth_eapol, scard_ctx); | |
2231 | } | |
2232 | ||
2233 | ||
2234 | /** | |
2235 | * wpa_sm_set_config - Notification of current configration change | |
2236 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2237 | * @config: Pointer to current network configuration | |
2238 | * | |
2239 | * Notify WPA state machine that configuration has changed. config will be | |
2240 | * stored as a backpointer to network configuration. This can be %NULL to clear | |
2241 | * the stored pointed. | |
2242 | */ | |
2243 | void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config) | |
2244 | { | |
2245 | if (!sm) | |
2246 | return; | |
2247 | ||
6fc6879b | 2248 | if (config) { |
886a807f | 2249 | sm->network_ctx = config->network_ctx; |
6fc6879b JM |
2250 | sm->peerkey_enabled = config->peerkey_enabled; |
2251 | sm->allowed_pairwise_cipher = config->allowed_pairwise_cipher; | |
2252 | sm->proactive_key_caching = config->proactive_key_caching; | |
2253 | sm->eap_workaround = config->eap_workaround; | |
2254 | sm->eap_conf_ctx = config->eap_conf_ctx; | |
2255 | if (config->ssid) { | |
2256 | os_memcpy(sm->ssid, config->ssid, config->ssid_len); | |
2257 | sm->ssid_len = config->ssid_len; | |
2258 | } else | |
2259 | sm->ssid_len = 0; | |
581a8cde | 2260 | sm->wpa_ptk_rekey = config->wpa_ptk_rekey; |
6fc6879b | 2261 | } else { |
886a807f | 2262 | sm->network_ctx = NULL; |
6fc6879b JM |
2263 | sm->peerkey_enabled = 0; |
2264 | sm->allowed_pairwise_cipher = 0; | |
2265 | sm->proactive_key_caching = 0; | |
2266 | sm->eap_workaround = 0; | |
2267 | sm->eap_conf_ctx = NULL; | |
2268 | sm->ssid_len = 0; | |
581a8cde | 2269 | sm->wpa_ptk_rekey = 0; |
6fc6879b | 2270 | } |
6fc6879b JM |
2271 | } |
2272 | ||
2273 | ||
2274 | /** | |
2275 | * wpa_sm_set_own_addr - Set own MAC address | |
2276 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2277 | * @addr: Own MAC address | |
2278 | */ | |
2279 | void wpa_sm_set_own_addr(struct wpa_sm *sm, const u8 *addr) | |
2280 | { | |
2281 | if (sm) | |
2282 | os_memcpy(sm->own_addr, addr, ETH_ALEN); | |
2283 | } | |
2284 | ||
2285 | ||
2286 | /** | |
2287 | * wpa_sm_set_ifname - Set network interface name | |
2288 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2289 | * @ifname: Interface name | |
2290 | * @bridge_ifname: Optional bridge interface name (for pre-auth) | |
2291 | */ | |
2292 | void wpa_sm_set_ifname(struct wpa_sm *sm, const char *ifname, | |
2293 | const char *bridge_ifname) | |
2294 | { | |
2295 | if (sm) { | |
2296 | sm->ifname = ifname; | |
2297 | sm->bridge_ifname = bridge_ifname; | |
2298 | } | |
2299 | } | |
2300 | ||
2301 | ||
2302 | /** | |
2303 | * wpa_sm_set_eapol - Set EAPOL state machine pointer | |
2304 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2305 | * @eapol: Pointer to EAPOL state machine allocated with eapol_sm_init() | |
2306 | */ | |
2307 | void wpa_sm_set_eapol(struct wpa_sm *sm, struct eapol_sm *eapol) | |
2308 | { | |
2309 | if (sm) | |
2310 | sm->eapol = eapol; | |
2311 | } | |
2312 | ||
2313 | ||
2314 | /** | |
2315 | * wpa_sm_set_param - Set WPA state machine parameters | |
2316 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2317 | * @param: Parameter field | |
2318 | * @value: Parameter value | |
2319 | * Returns: 0 on success, -1 on failure | |
2320 | */ | |
2321 | int wpa_sm_set_param(struct wpa_sm *sm, enum wpa_sm_conf_params param, | |
2322 | unsigned int value) | |
2323 | { | |
2324 | int ret = 0; | |
2325 | ||
2326 | if (sm == NULL) | |
2327 | return -1; | |
2328 | ||
2329 | switch (param) { | |
2330 | case RSNA_PMK_LIFETIME: | |
2331 | if (value > 0) | |
2332 | sm->dot11RSNAConfigPMKLifetime = value; | |
2333 | else | |
2334 | ret = -1; | |
2335 | break; | |
2336 | case RSNA_PMK_REAUTH_THRESHOLD: | |
2337 | if (value > 0 && value <= 100) | |
2338 | sm->dot11RSNAConfigPMKReauthThreshold = value; | |
2339 | else | |
2340 | ret = -1; | |
2341 | break; | |
2342 | case RSNA_SA_TIMEOUT: | |
2343 | if (value > 0) | |
2344 | sm->dot11RSNAConfigSATimeout = value; | |
2345 | else | |
2346 | ret = -1; | |
2347 | break; | |
2348 | case WPA_PARAM_PROTO: | |
2349 | sm->proto = value; | |
2350 | break; | |
2351 | case WPA_PARAM_PAIRWISE: | |
2352 | sm->pairwise_cipher = value; | |
2353 | break; | |
2354 | case WPA_PARAM_GROUP: | |
2355 | sm->group_cipher = value; | |
2356 | break; | |
2357 | case WPA_PARAM_KEY_MGMT: | |
2358 | sm->key_mgmt = value; | |
2359 | break; | |
2360 | #ifdef CONFIG_IEEE80211W | |
2361 | case WPA_PARAM_MGMT_GROUP: | |
2362 | sm->mgmt_group_cipher = value; | |
2363 | break; | |
2364 | #endif /* CONFIG_IEEE80211W */ | |
2365 | case WPA_PARAM_RSN_ENABLED: | |
2366 | sm->rsn_enabled = value; | |
2367 | break; | |
e820cf95 JM |
2368 | case WPA_PARAM_MFP: |
2369 | sm->mfp = value; | |
2370 | break; | |
6fc6879b JM |
2371 | default: |
2372 | break; | |
2373 | } | |
2374 | ||
2375 | return ret; | |
2376 | } | |
2377 | ||
2378 | ||
2379 | /** | |
2380 | * wpa_sm_get_param - Get WPA state machine parameters | |
2381 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2382 | * @param: Parameter field | |
2383 | * Returns: Parameter value | |
2384 | */ | |
2385 | unsigned int wpa_sm_get_param(struct wpa_sm *sm, enum wpa_sm_conf_params param) | |
2386 | { | |
2387 | if (sm == NULL) | |
2388 | return 0; | |
2389 | ||
2390 | switch (param) { | |
2391 | case RSNA_PMK_LIFETIME: | |
2392 | return sm->dot11RSNAConfigPMKLifetime; | |
2393 | case RSNA_PMK_REAUTH_THRESHOLD: | |
2394 | return sm->dot11RSNAConfigPMKReauthThreshold; | |
2395 | case RSNA_SA_TIMEOUT: | |
2396 | return sm->dot11RSNAConfigSATimeout; | |
2397 | case WPA_PARAM_PROTO: | |
2398 | return sm->proto; | |
2399 | case WPA_PARAM_PAIRWISE: | |
2400 | return sm->pairwise_cipher; | |
2401 | case WPA_PARAM_GROUP: | |
2402 | return sm->group_cipher; | |
2403 | case WPA_PARAM_KEY_MGMT: | |
2404 | return sm->key_mgmt; | |
2405 | #ifdef CONFIG_IEEE80211W | |
2406 | case WPA_PARAM_MGMT_GROUP: | |
2407 | return sm->mgmt_group_cipher; | |
2408 | #endif /* CONFIG_IEEE80211W */ | |
2409 | case WPA_PARAM_RSN_ENABLED: | |
2410 | return sm->rsn_enabled; | |
2411 | default: | |
2412 | return 0; | |
2413 | } | |
2414 | } | |
2415 | ||
2416 | ||
2417 | /** | |
2418 | * wpa_sm_get_status - Get WPA state machine | |
2419 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2420 | * @buf: Buffer for status information | |
2421 | * @buflen: Maximum buffer length | |
2422 | * @verbose: Whether to include verbose status information | |
2423 | * Returns: Number of bytes written to buf. | |
2424 | * | |
2425 | * Query WPA state machine for status information. This function fills in | |
2426 | * a text area with current status information. If the buffer (buf) is not | |
2427 | * large enough, status information will be truncated to fit the buffer. | |
2428 | */ | |
2429 | int wpa_sm_get_status(struct wpa_sm *sm, char *buf, size_t buflen, | |
2430 | int verbose) | |
2431 | { | |
2432 | char *pos = buf, *end = buf + buflen; | |
2433 | int ret; | |
2434 | ||
2435 | ret = os_snprintf(pos, end - pos, | |
2436 | "pairwise_cipher=%s\n" | |
2437 | "group_cipher=%s\n" | |
2438 | "key_mgmt=%s\n", | |
2439 | wpa_cipher_txt(sm->pairwise_cipher), | |
2440 | wpa_cipher_txt(sm->group_cipher), | |
2441 | wpa_key_mgmt_txt(sm->key_mgmt, sm->proto)); | |
2442 | if (ret < 0 || ret >= end - pos) | |
2443 | return pos - buf; | |
2444 | pos += ret; | |
2445 | return pos - buf; | |
2446 | } | |
2447 | ||
2448 | ||
2449 | /** | |
2450 | * wpa_sm_set_assoc_wpa_ie_default - Generate own WPA/RSN IE from configuration | |
2451 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2452 | * @wpa_ie: Pointer to buffer for WPA/RSN IE | |
2453 | * @wpa_ie_len: Pointer to the length of the wpa_ie buffer | |
2454 | * Returns: 0 on success, -1 on failure | |
2455 | */ | |
2456 | int wpa_sm_set_assoc_wpa_ie_default(struct wpa_sm *sm, u8 *wpa_ie, | |
2457 | size_t *wpa_ie_len) | |
2458 | { | |
2459 | int res; | |
2460 | ||
2461 | if (sm == NULL) | |
2462 | return -1; | |
2463 | ||
2464 | res = wpa_gen_wpa_ie(sm, wpa_ie, *wpa_ie_len); | |
2465 | if (res < 0) | |
2466 | return -1; | |
2467 | *wpa_ie_len = res; | |
2468 | ||
2469 | wpa_hexdump(MSG_DEBUG, "WPA: Set own WPA IE default", | |
2470 | wpa_ie, *wpa_ie_len); | |
2471 | ||
2472 | if (sm->assoc_wpa_ie == NULL) { | |
2473 | /* | |
2474 | * Make a copy of the WPA/RSN IE so that 4-Way Handshake gets | |
2475 | * the correct version of the IE even if PMKSA caching is | |
2476 | * aborted (which would remove PMKID from IE generation). | |
2477 | */ | |
2478 | sm->assoc_wpa_ie = os_malloc(*wpa_ie_len); | |
2479 | if (sm->assoc_wpa_ie == NULL) | |
2480 | return -1; | |
2481 | ||
2482 | os_memcpy(sm->assoc_wpa_ie, wpa_ie, *wpa_ie_len); | |
2483 | sm->assoc_wpa_ie_len = *wpa_ie_len; | |
2484 | } | |
2485 | ||
2486 | return 0; | |
2487 | } | |
2488 | ||
2489 | ||
2490 | /** | |
2491 | * wpa_sm_set_assoc_wpa_ie - Set own WPA/RSN IE from (Re)AssocReq | |
2492 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2493 | * @ie: Pointer to IE data (starting from id) | |
2494 | * @len: IE length | |
2495 | * Returns: 0 on success, -1 on failure | |
2496 | * | |
2497 | * Inform WPA state machine about the WPA/RSN IE used in (Re)Association | |
2498 | * Request frame. The IE will be used to override the default value generated | |
2499 | * with wpa_sm_set_assoc_wpa_ie_default(). | |
2500 | */ | |
2501 | int wpa_sm_set_assoc_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len) | |
2502 | { | |
2503 | if (sm == NULL) | |
2504 | return -1; | |
2505 | ||
2506 | os_free(sm->assoc_wpa_ie); | |
2507 | if (ie == NULL || len == 0) { | |
f049052b BG |
2508 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2509 | "WPA: clearing own WPA/RSN IE"); | |
6fc6879b JM |
2510 | sm->assoc_wpa_ie = NULL; |
2511 | sm->assoc_wpa_ie_len = 0; | |
2512 | } else { | |
2513 | wpa_hexdump(MSG_DEBUG, "WPA: set own WPA/RSN IE", ie, len); | |
2514 | sm->assoc_wpa_ie = os_malloc(len); | |
2515 | if (sm->assoc_wpa_ie == NULL) | |
2516 | return -1; | |
2517 | ||
2518 | os_memcpy(sm->assoc_wpa_ie, ie, len); | |
2519 | sm->assoc_wpa_ie_len = len; | |
2520 | } | |
2521 | ||
2522 | return 0; | |
2523 | } | |
2524 | ||
2525 | ||
2526 | /** | |
2527 | * wpa_sm_set_ap_wpa_ie - Set AP WPA IE from Beacon/ProbeResp | |
2528 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2529 | * @ie: Pointer to IE data (starting from id) | |
2530 | * @len: IE length | |
2531 | * Returns: 0 on success, -1 on failure | |
2532 | * | |
2533 | * Inform WPA state machine about the WPA IE used in Beacon / Probe Response | |
2534 | * frame. | |
2535 | */ | |
2536 | int wpa_sm_set_ap_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len) | |
2537 | { | |
2538 | if (sm == NULL) | |
2539 | return -1; | |
2540 | ||
2541 | os_free(sm->ap_wpa_ie); | |
2542 | if (ie == NULL || len == 0) { | |
f049052b BG |
2543 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2544 | "WPA: clearing AP WPA IE"); | |
6fc6879b JM |
2545 | sm->ap_wpa_ie = NULL; |
2546 | sm->ap_wpa_ie_len = 0; | |
2547 | } else { | |
2548 | wpa_hexdump(MSG_DEBUG, "WPA: set AP WPA IE", ie, len); | |
2549 | sm->ap_wpa_ie = os_malloc(len); | |
2550 | if (sm->ap_wpa_ie == NULL) | |
2551 | return -1; | |
2552 | ||
2553 | os_memcpy(sm->ap_wpa_ie, ie, len); | |
2554 | sm->ap_wpa_ie_len = len; | |
2555 | } | |
2556 | ||
2557 | return 0; | |
2558 | } | |
2559 | ||
2560 | ||
2561 | /** | |
2562 | * wpa_sm_set_ap_rsn_ie - Set AP RSN IE from Beacon/ProbeResp | |
2563 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2564 | * @ie: Pointer to IE data (starting from id) | |
2565 | * @len: IE length | |
2566 | * Returns: 0 on success, -1 on failure | |
2567 | * | |
2568 | * Inform WPA state machine about the RSN IE used in Beacon / Probe Response | |
2569 | * frame. | |
2570 | */ | |
2571 | int wpa_sm_set_ap_rsn_ie(struct wpa_sm *sm, const u8 *ie, size_t len) | |
2572 | { | |
2573 | if (sm == NULL) | |
2574 | return -1; | |
2575 | ||
2576 | os_free(sm->ap_rsn_ie); | |
2577 | if (ie == NULL || len == 0) { | |
f049052b BG |
2578 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2579 | "WPA: clearing AP RSN IE"); | |
6fc6879b JM |
2580 | sm->ap_rsn_ie = NULL; |
2581 | sm->ap_rsn_ie_len = 0; | |
2582 | } else { | |
2583 | wpa_hexdump(MSG_DEBUG, "WPA: set AP RSN IE", ie, len); | |
2584 | sm->ap_rsn_ie = os_malloc(len); | |
2585 | if (sm->ap_rsn_ie == NULL) | |
2586 | return -1; | |
2587 | ||
2588 | os_memcpy(sm->ap_rsn_ie, ie, len); | |
2589 | sm->ap_rsn_ie_len = len; | |
2590 | } | |
2591 | ||
2592 | return 0; | |
2593 | } | |
2594 | ||
2595 | ||
2596 | /** | |
2597 | * wpa_sm_parse_own_wpa_ie - Parse own WPA/RSN IE | |
2598 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2599 | * @data: Pointer to data area for parsing results | |
2600 | * Returns: 0 on success, -1 if IE is not known, or -2 on parsing failure | |
2601 | * | |
2602 | * Parse the contents of the own WPA or RSN IE from (Re)AssocReq and write the | |
2603 | * parsed data into data. | |
2604 | */ | |
2605 | int wpa_sm_parse_own_wpa_ie(struct wpa_sm *sm, struct wpa_ie_data *data) | |
2606 | { | |
2a522e71 JM |
2607 | if (sm == NULL) |
2608 | return -1; | |
2609 | ||
2610 | if (sm->assoc_wpa_ie == NULL) { | |
f049052b BG |
2611 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2612 | "WPA: No WPA/RSN IE available from association info"); | |
6fc6879b JM |
2613 | return -1; |
2614 | } | |
2615 | if (wpa_parse_wpa_ie(sm->assoc_wpa_ie, sm->assoc_wpa_ie_len, data)) | |
2616 | return -2; | |
2617 | return 0; | |
2618 | } | |
540264a7 JM |
2619 | |
2620 | ||
2621 | int wpa_sm_pmksa_cache_list(struct wpa_sm *sm, char *buf, size_t len) | |
2622 | { | |
2623 | #ifndef CONFIG_NO_WPA2 | |
2624 | return pmksa_cache_list(sm->pmksa, buf, len); | |
2625 | #else /* CONFIG_NO_WPA2 */ | |
2626 | return -1; | |
2627 | #endif /* CONFIG_NO_WPA2 */ | |
2628 | } | |
32d5295f JM |
2629 | |
2630 | ||
2631 | void wpa_sm_drop_sa(struct wpa_sm *sm) | |
2632 | { | |
f049052b | 2633 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PMK and PTK"); |
32d5295f JM |
2634 | sm->ptk_set = 0; |
2635 | sm->tptk_set = 0; | |
2636 | os_memset(sm->pmk, 0, sizeof(sm->pmk)); | |
2637 | os_memset(&sm->ptk, 0, sizeof(sm->ptk)); | |
2638 | os_memset(&sm->tptk, 0, sizeof(sm->tptk)); | |
2639 | } | |
0d7b4409 JM |
2640 | |
2641 | ||
2642 | int wpa_sm_has_ptk(struct wpa_sm *sm) | |
2643 | { | |
2644 | if (sm == NULL) | |
2645 | return 0; | |
2646 | return sm->ptk_set; | |
2647 | } | |
b14a210c JB |
2648 | |
2649 | ||
2650 | void wpa_sm_update_replay_ctr(struct wpa_sm *sm, const u8 *replay_ctr) | |
2651 | { | |
2652 | os_memcpy(sm->rx_replay_counter, replay_ctr, WPA_REPLAY_COUNTER_LEN); | |
2653 | } | |
d8a790b9 JM |
2654 | |
2655 | ||
2656 | void wpa_sm_pmksa_cache_flush(struct wpa_sm *sm, void *network_ctx) | |
2657 | { | |
2658 | #ifndef CONFIG_NO_WPA2 | |
2659 | pmksa_cache_flush(sm->pmksa, network_ctx); | |
2660 | #endif /* CONFIG_NO_WPA2 */ | |
2661 | } | |
75cad1a0 XC |
2662 | |
2663 | ||
2664 | #ifdef CONFIG_IEEE80211V | |
2665 | int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 subelem_id, u8 *buf) | |
2666 | { | |
2667 | struct wpa_gtk_data gd; | |
2668 | #ifdef CONFIG_IEEE80211W | |
2669 | struct wpa_igtk_kde igd; | |
2670 | u16 keyidx; | |
2671 | #endif /* CONFIG_IEEE80211W */ | |
2672 | u16 keyinfo; | |
2673 | u8 keylen; /* plaintext key len */ | |
2674 | u8 keydatalen; | |
2675 | u8 *key_rsc; | |
2676 | ||
2677 | os_memset(&gd, 0, sizeof(gd)); | |
2678 | #ifdef CONFIG_IEEE80211W | |
2679 | os_memset(&igd, 0, sizeof(igd)); | |
2680 | #endif /* CONFIG_IEEE80211W */ | |
2681 | ||
2682 | switch (sm->group_cipher) { | |
2683 | case WPA_CIPHER_CCMP: | |
2684 | keylen = 16; | |
2685 | gd.key_rsc_len = 6; | |
2686 | gd.alg = WPA_ALG_CCMP; | |
2687 | break; | |
2688 | case WPA_CIPHER_TKIP: | |
2689 | keylen = 32; | |
2690 | gd.key_rsc_len = 6; | |
2691 | gd.alg = WPA_ALG_TKIP; | |
2692 | break; | |
2693 | case WPA_CIPHER_WEP104: | |
2694 | keylen = 13; | |
2695 | gd.key_rsc_len = 0; | |
2696 | gd.alg = WPA_ALG_WEP; | |
2697 | break; | |
2698 | case WPA_CIPHER_WEP40: | |
2699 | keylen = 5; | |
2700 | gd.key_rsc_len = 0; | |
2701 | gd.alg = WPA_ALG_WEP; | |
2702 | break; | |
2703 | default: | |
2704 | wpa_printf(MSG_DEBUG, "Unsupported group cipher suite"); | |
2705 | return -1; | |
2706 | } | |
2707 | ||
2708 | if (subelem_id == WNM_SLEEP_SUBELEM_GTK) { | |
2709 | key_rsc = buf + 5; | |
2710 | keyinfo = WPA_GET_LE16(buf+2); | |
2711 | keydatalen = buf[1] - 11 - 8; | |
2712 | gd.gtk_len = keylen; | |
2713 | if (gd.gtk_len != buf[4]) { | |
2714 | wpa_printf(MSG_DEBUG, "GTK len mismatch len %d vs %d", | |
2715 | gd.gtk_len, buf[4]); | |
2716 | return -1; | |
2717 | } | |
2718 | gd.keyidx = keyinfo & 0x03; /* B0 - B1 */ | |
2719 | gd.tx = wpa_supplicant_gtk_tx_bit_workaround( | |
2720 | sm, !!(keyinfo & WPA_KEY_INFO_TXRX)); | |
2721 | ||
2722 | if (keydatalen % 8) { | |
2723 | wpa_printf(MSG_DEBUG, "WPA: Unsupported AES-WRAP len " | |
2724 | "%d", keydatalen); | |
2725 | return -1; | |
2726 | } | |
2727 | ||
2728 | if (aes_unwrap(sm->ptk.kek, keydatalen / 8, buf + 13, gd.gtk)) | |
2729 | { | |
2730 | wpa_printf(MSG_WARNING, "WNM: AES unwrap failed - " | |
2731 | "could not decrypt GTK"); | |
2732 | return -1; | |
2733 | } | |
2734 | ||
2735 | wpa_hexdump_key(MSG_DEBUG, "Install GTK (WNM SLEEP)", | |
2736 | gd.gtk, gd.gtk_len); | |
2737 | if (wpa_supplicant_install_gtk(sm, &gd, key_rsc)) { | |
2738 | wpa_printf(MSG_DEBUG, "Failed to install the GTK in " | |
2739 | "WNM mode"); | |
2740 | return -1; | |
2741 | } | |
2742 | #ifdef CONFIG_IEEE80211W | |
2743 | } else if (subelem_id == WNM_SLEEP_SUBELEM_IGTK) { | |
2744 | if (buf[1] != 2 + 6 + WPA_IGTK_LEN + 8) { | |
2745 | wpa_printf(MSG_DEBUG, "WPA: Unsupported AES-WRAP len " | |
2746 | "%d", buf[1] - 2 - 6 - 8); | |
2747 | return -1; | |
2748 | } | |
2749 | os_memcpy(igd.keyid, buf + 2, 2); | |
2750 | os_memcpy(igd.pn, buf + 4, 6); | |
2751 | ||
2752 | keyidx = WPA_GET_LE16(igd.keyid); | |
2753 | ||
2754 | if (aes_unwrap(sm->ptk.kek, WPA_IGTK_LEN / 8, buf + 10, | |
2755 | igd.igtk)) { | |
2756 | wpa_printf(MSG_WARNING, "WNM: AES unwrap failed - " | |
2757 | "could not decrypr IGTK"); | |
2758 | return -1; | |
2759 | } | |
2760 | ||
2761 | wpa_hexdump_key(MSG_DEBUG, "Install IGTK (WNM SLEEP)", | |
2762 | igd.igtk, WPA_IGTK_LEN); | |
2763 | if (wpa_sm_set_key(sm, WPA_ALG_IGTK, broadcast_ether_addr, | |
2764 | keyidx, 0, igd.pn, sizeof(igd.pn), | |
2765 | igd.igtk, WPA_IGTK_LEN) < 0) { | |
2766 | wpa_printf(MSG_DEBUG, "Failed to install the IGTK in " | |
2767 | "WNM mode"); | |
2768 | return -1; | |
2769 | } | |
2770 | #endif /* CONFIG_IEEE80211W */ | |
2771 | } else { | |
2772 | wpa_printf(MSG_DEBUG, "Unknown element id"); | |
2773 | return -1; | |
2774 | } | |
2775 | ||
2776 | return 0; | |
2777 | } | |
2778 | #endif /* CONFIG_IEEE80211V */ |