]>
Commit | Line | Data |
---|---|---|
6fc6879b JM |
1 | /* |
2 | * WPA Supplicant - WPA state machine and EAPOL-Key processing | |
98cd3d1c | 3 | * Copyright (c) 2003-2015, Jouni Malinen <j@w1.fi> |
73ed03f3 | 4 | * Copyright(c) 2015 Intel Deutschland GmbH |
6fc6879b | 5 | * |
0f3d578e JM |
6 | * This software may be distributed under the terms of the BSD license. |
7 | * See README for more details. | |
6fc6879b JM |
8 | */ |
9 | ||
10 | #include "includes.h" | |
11 | ||
12 | #include "common.h" | |
03da66bd JM |
13 | #include "crypto/aes_wrap.h" |
14 | #include "crypto/crypto.h" | |
3642c431 | 15 | #include "crypto/random.h" |
03da66bd JM |
16 | #include "common/ieee802_11_defs.h" |
17 | #include "eapol_supp/eapol_supp_sm.h" | |
6fc6879b JM |
18 | #include "wpa.h" |
19 | #include "eloop.h" | |
6fc6879b JM |
20 | #include "preauth.h" |
21 | #include "pmksa_cache.h" | |
22 | #include "wpa_i.h" | |
23 | #include "wpa_ie.h" | |
24 | #include "peerkey.h" | |
6fc6879b JM |
25 | |
26 | ||
73ed03f3 MS |
27 | static const u8 null_rsc[8] = { 0, 0, 0, 0, 0, 0, 0, 0 }; |
28 | ||
29 | ||
6fc6879b JM |
30 | /** |
31 | * wpa_eapol_key_send - Send WPA/RSN EAPOL-Key message | |
32 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
33 | * @kck: Key Confirmation Key (KCK, part of PTK) | |
98cd3d1c | 34 | * @kck_len: KCK length in octets |
6fc6879b JM |
35 | * @ver: Version field from Key Info |
36 | * @dest: Destination address for the frame | |
37 | * @proto: Ethertype (usually ETH_P_EAPOL) | |
38 | * @msg: EAPOL-Key message | |
39 | * @msg_len: Length of message | |
40 | * @key_mic: Pointer to the buffer to which the EAPOL-Key MIC is written | |
c93b7e18 | 41 | * Returns: >= 0 on success, < 0 on failure |
6fc6879b | 42 | */ |
c93b7e18 AA |
43 | int wpa_eapol_key_send(struct wpa_sm *sm, const u8 *kck, size_t kck_len, |
44 | int ver, const u8 *dest, u16 proto, | |
45 | u8 *msg, size_t msg_len, u8 *key_mic) | |
6fc6879b | 46 | { |
c93b7e18 | 47 | int ret = -1; |
5e3b5197 | 48 | size_t mic_len = wpa_mic_len(sm->key_mgmt); |
98cd3d1c | 49 | |
a8e16edc | 50 | if (is_zero_ether_addr(dest) && is_zero_ether_addr(sm->bssid)) { |
6fc6879b JM |
51 | /* |
52 | * Association event was not yet received; try to fetch | |
53 | * BSSID from the driver. | |
54 | */ | |
55 | if (wpa_sm_get_bssid(sm, sm->bssid) < 0) { | |
f049052b BG |
56 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
57 | "WPA: Failed to read BSSID for " | |
58 | "EAPOL-Key destination address"); | |
6fc6879b JM |
59 | } else { |
60 | dest = sm->bssid; | |
f049052b BG |
61 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
62 | "WPA: Use BSSID (" MACSTR | |
63 | ") as the destination for EAPOL-Key", | |
64 | MAC2STR(dest)); | |
6fc6879b JM |
65 | } |
66 | } | |
04b6b3ed | 67 | if (key_mic && |
98cd3d1c JM |
68 | wpa_eapol_key_mic(kck, kck_len, sm->key_mgmt, ver, msg, msg_len, |
69 | key_mic)) { | |
f049052b | 70 | wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, |
929a2ea5 JM |
71 | "WPA: Failed to generate EAPOL-Key version %d key_mgmt 0x%x MIC", |
72 | ver, sm->key_mgmt); | |
04b6b3ed JM |
73 | goto out; |
74 | } | |
98cd3d1c JM |
75 | wpa_hexdump_key(MSG_DEBUG, "WPA: KCK", kck, kck_len); |
76 | wpa_hexdump(MSG_DEBUG, "WPA: Derived Key MIC", key_mic, mic_len); | |
6fc6879b | 77 | wpa_hexdump(MSG_MSGDUMP, "WPA: TX EAPOL-Key", msg, msg_len); |
c93b7e18 | 78 | ret = wpa_sm_ether_send(sm, dest, proto, msg, msg_len); |
6fc6879b | 79 | eapol_sm_notify_tx_eapol_key(sm->eapol); |
04b6b3ed | 80 | out: |
6fc6879b | 81 | os_free(msg); |
c93b7e18 | 82 | return ret; |
6fc6879b JM |
83 | } |
84 | ||
85 | ||
86 | /** | |
87 | * wpa_sm_key_request - Send EAPOL-Key Request | |
88 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
89 | * @error: Indicate whether this is an Michael MIC error report | |
90 | * @pairwise: 1 = error report for pairwise packet, 0 = for group packet | |
6fc6879b JM |
91 | * |
92 | * Send an EAPOL-Key Request to the current authenticator. This function is | |
93 | * used to request rekeying and it is usually called when a local Michael MIC | |
94 | * failure is detected. | |
95 | */ | |
96 | void wpa_sm_key_request(struct wpa_sm *sm, int error, int pairwise) | |
97 | { | |
5e3b5197 | 98 | size_t mic_len, hdrlen, rlen; |
6fc6879b | 99 | struct wpa_eapol_key *reply; |
5e3b5197 | 100 | struct wpa_eapol_key_192 *reply192; |
6fc6879b | 101 | int key_info, ver; |
5e3b5197 | 102 | u8 bssid[ETH_ALEN], *rbuf, *key_mic; |
6fc6879b | 103 | |
929a2ea5 JM |
104 | if (sm->key_mgmt == WPA_KEY_MGMT_OSEN || |
105 | wpa_key_mgmt_suite_b(sm->key_mgmt)) | |
df0f01d9 JM |
106 | ver = WPA_KEY_INFO_TYPE_AKM_DEFINED; |
107 | else if (wpa_key_mgmt_ft(sm->key_mgmt) || | |
108 | wpa_key_mgmt_sha256(sm->key_mgmt)) | |
6fc6879b | 109 | ver = WPA_KEY_INFO_TYPE_AES_128_CMAC; |
eb7719ff | 110 | else if (sm->pairwise_cipher != WPA_CIPHER_TKIP) |
6fc6879b JM |
111 | ver = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES; |
112 | else | |
113 | ver = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4; | |
114 | ||
115 | if (wpa_sm_get_bssid(sm, bssid) < 0) { | |
f049052b BG |
116 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
117 | "Failed to read BSSID for EAPOL-Key request"); | |
6fc6879b JM |
118 | return; |
119 | } | |
120 | ||
5e3b5197 JM |
121 | mic_len = wpa_mic_len(sm->key_mgmt); |
122 | hdrlen = mic_len == 24 ? sizeof(*reply192) : sizeof(*reply); | |
6fc6879b | 123 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, |
5e3b5197 | 124 | hdrlen, &rlen, (void *) &reply); |
6fc6879b JM |
125 | if (rbuf == NULL) |
126 | return; | |
5e3b5197 | 127 | reply192 = (struct wpa_eapol_key_192 *) reply; |
6fc6879b | 128 | |
a14896e8 JM |
129 | reply->type = (sm->proto == WPA_PROTO_RSN || |
130 | sm->proto == WPA_PROTO_OSEN) ? | |
6fc6879b JM |
131 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; |
132 | key_info = WPA_KEY_INFO_REQUEST | ver; | |
133 | if (sm->ptk_set) | |
134 | key_info |= WPA_KEY_INFO_MIC; | |
135 | if (error) | |
136 | key_info |= WPA_KEY_INFO_ERROR; | |
137 | if (pairwise) | |
138 | key_info |= WPA_KEY_INFO_KEY_TYPE; | |
139 | WPA_PUT_BE16(reply->key_info, key_info); | |
140 | WPA_PUT_BE16(reply->key_length, 0); | |
141 | os_memcpy(reply->replay_counter, sm->request_counter, | |
142 | WPA_REPLAY_COUNTER_LEN); | |
143 | inc_byte_array(sm->request_counter, WPA_REPLAY_COUNTER_LEN); | |
144 | ||
5e3b5197 JM |
145 | if (mic_len == 24) |
146 | WPA_PUT_BE16(reply192->key_data_length, 0); | |
147 | else | |
148 | WPA_PUT_BE16(reply->key_data_length, 0); | |
149 | if (!(key_info & WPA_KEY_INFO_MIC)) | |
150 | key_mic = NULL; | |
151 | else | |
152 | key_mic = reply192->key_mic; /* same offset in reply */ | |
6fc6879b | 153 | |
f049052b BG |
154 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
155 | "WPA: Sending EAPOL-Key Request (error=%d " | |
156 | "pairwise=%d ptk_set=%d len=%lu)", | |
157 | error, pairwise, sm->ptk_set, (unsigned long) rlen); | |
98cd3d1c | 158 | wpa_eapol_key_send(sm, sm->ptk.kck, sm->ptk.kck_len, ver, bssid, |
5e3b5197 | 159 | ETH_P_EAPOL, rbuf, rlen, key_mic); |
6fc6879b JM |
160 | } |
161 | ||
162 | ||
b41f2684 CL |
163 | static void wpa_supplicant_key_mgmt_set_pmk(struct wpa_sm *sm) |
164 | { | |
165 | #ifdef CONFIG_IEEE80211R | |
166 | if (sm->key_mgmt == WPA_KEY_MGMT_FT_IEEE8021X) { | |
167 | if (wpa_sm_key_mgmt_set_pmk(sm, sm->xxkey, sm->xxkey_len)) | |
168 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
169 | "RSN: Cannot set low order 256 bits of MSK for key management offload"); | |
170 | } else { | |
171 | #endif /* CONFIG_IEEE80211R */ | |
172 | if (wpa_sm_key_mgmt_set_pmk(sm, sm->pmk, sm->pmk_len)) | |
173 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
174 | "RSN: Cannot set PMK for key management offload"); | |
175 | #ifdef CONFIG_IEEE80211R | |
176 | } | |
177 | #endif /* CONFIG_IEEE80211R */ | |
178 | } | |
179 | ||
180 | ||
6fc6879b JM |
181 | static int wpa_supplicant_get_pmk(struct wpa_sm *sm, |
182 | const unsigned char *src_addr, | |
183 | const u8 *pmkid) | |
184 | { | |
185 | int abort_cached = 0; | |
186 | ||
187 | if (pmkid && !sm->cur_pmksa) { | |
188 | /* When using drivers that generate RSN IE, wpa_supplicant may | |
189 | * not have enough time to get the association information | |
190 | * event before receiving this 1/4 message, so try to find a | |
191 | * matching PMKSA cache entry here. */ | |
96efeeb6 JM |
192 | sm->cur_pmksa = pmksa_cache_get(sm->pmksa, src_addr, pmkid, |
193 | NULL); | |
6fc6879b | 194 | if (sm->cur_pmksa) { |
f049052b BG |
195 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
196 | "RSN: found matching PMKID from PMKSA cache"); | |
6fc6879b | 197 | } else { |
f049052b BG |
198 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
199 | "RSN: no matching PMKID found"); | |
6fc6879b JM |
200 | abort_cached = 1; |
201 | } | |
202 | } | |
203 | ||
204 | if (pmkid && sm->cur_pmksa && | |
0d15b69f | 205 | os_memcmp_const(pmkid, sm->cur_pmksa->pmkid, PMKID_LEN) == 0) { |
6fc6879b JM |
206 | wpa_hexdump(MSG_DEBUG, "RSN: matched PMKID", pmkid, PMKID_LEN); |
207 | wpa_sm_set_pmk_from_pmksa(sm); | |
208 | wpa_hexdump_key(MSG_DEBUG, "RSN: PMK from PMKSA cache", | |
209 | sm->pmk, sm->pmk_len); | |
210 | eapol_sm_notify_cached(sm->eapol); | |
211 | #ifdef CONFIG_IEEE80211R | |
212 | sm->xxkey_len = 0; | |
213 | #endif /* CONFIG_IEEE80211R */ | |
56586197 | 214 | } else if (wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) && sm->eapol) { |
6fc6879b | 215 | int res, pmk_len; |
207976f0 JM |
216 | |
217 | if (sm->key_mgmt & WPA_KEY_MGMT_IEEE8021X_SUITE_B_192) | |
218 | pmk_len = PMK_LEN_SUITE_B_192; | |
219 | else | |
220 | pmk_len = PMK_LEN; | |
221 | res = eapol_sm_get_key(sm->eapol, sm->pmk, pmk_len); | |
6fc6879b | 222 | if (res) { |
207976f0 JM |
223 | if (pmk_len == PMK_LEN) { |
224 | /* | |
225 | * EAP-LEAP is an exception from other EAP | |
226 | * methods: it uses only 16-byte PMK. | |
227 | */ | |
228 | res = eapol_sm_get_key(sm->eapol, sm->pmk, 16); | |
229 | pmk_len = 16; | |
230 | } | |
6fc6879b JM |
231 | } else { |
232 | #ifdef CONFIG_IEEE80211R | |
233 | u8 buf[2 * PMK_LEN]; | |
234 | if (eapol_sm_get_key(sm->eapol, buf, 2 * PMK_LEN) == 0) | |
235 | { | |
236 | os_memcpy(sm->xxkey, buf + PMK_LEN, PMK_LEN); | |
237 | sm->xxkey_len = PMK_LEN; | |
238 | os_memset(buf, 0, sizeof(buf)); | |
239 | } | |
240 | #endif /* CONFIG_IEEE80211R */ | |
241 | } | |
242 | if (res == 0) { | |
a7f10d65 | 243 | struct rsn_pmksa_cache_entry *sa = NULL; |
6fc6879b JM |
244 | wpa_hexdump_key(MSG_DEBUG, "WPA: PMK from EAPOL state " |
245 | "machines", sm->pmk, pmk_len); | |
246 | sm->pmk_len = pmk_len; | |
b41f2684 | 247 | wpa_supplicant_key_mgmt_set_pmk(sm); |
715ed737 | 248 | if (sm->proto == WPA_PROTO_RSN && |
087a1f4e | 249 | !wpa_key_mgmt_suite_b(sm->key_mgmt) && |
715ed737 | 250 | !wpa_key_mgmt_ft(sm->key_mgmt)) { |
a7f10d65 JM |
251 | sa = pmksa_cache_add(sm->pmksa, |
252 | sm->pmk, pmk_len, | |
087a1f4e | 253 | NULL, 0, |
a7f10d65 JM |
254 | src_addr, sm->own_addr, |
255 | sm->network_ctx, | |
256 | sm->key_mgmt); | |
f5a51b58 | 257 | } |
6fc6879b | 258 | if (!sm->cur_pmksa && pmkid && |
96efeeb6 JM |
259 | pmksa_cache_get(sm->pmksa, src_addr, pmkid, NULL)) |
260 | { | |
f049052b BG |
261 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
262 | "RSN: the new PMK matches with the " | |
263 | "PMKID"); | |
6fc6879b | 264 | abort_cached = 0; |
bddc51e8 JM |
265 | } else if (sa && !sm->cur_pmksa && pmkid) { |
266 | /* | |
267 | * It looks like the authentication server | |
268 | * derived mismatching MSK. This should not | |
269 | * really happen, but bugs happen.. There is not | |
270 | * much we can do here without knowing what | |
271 | * exactly caused the server to misbehave. | |
272 | */ | |
273 | wpa_dbg(sm->ctx->msg_ctx, MSG_INFO, | |
274 | "RSN: PMKID mismatch - authentication server may have derived different MSK?!"); | |
275 | return -1; | |
6fc6879b | 276 | } |
a7f10d65 JM |
277 | |
278 | if (!sm->cur_pmksa) | |
279 | sm->cur_pmksa = sa; | |
6fc6879b | 280 | } else { |
0f057fb2 | 281 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
6fc6879b | 282 | "WPA: Failed to get master session key from " |
f049052b BG |
283 | "EAPOL state machines - key handshake " |
284 | "aborted"); | |
6fc6879b | 285 | if (sm->cur_pmksa) { |
f049052b BG |
286 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
287 | "RSN: Cancelled PMKSA caching " | |
288 | "attempt"); | |
6fc6879b JM |
289 | sm->cur_pmksa = NULL; |
290 | abort_cached = 1; | |
1ac2d4a9 | 291 | } else if (!abort_cached) { |
6fc6879b JM |
292 | return -1; |
293 | } | |
294 | } | |
295 | } | |
296 | ||
715ed737 | 297 | if (abort_cached && wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) && |
087a1f4e | 298 | !wpa_key_mgmt_suite_b(sm->key_mgmt) && |
a14896e8 JM |
299 | !wpa_key_mgmt_ft(sm->key_mgmt) && sm->key_mgmt != WPA_KEY_MGMT_OSEN) |
300 | { | |
6fc6879b JM |
301 | /* Send EAPOL-Start to trigger full EAP authentication. */ |
302 | u8 *buf; | |
303 | size_t buflen; | |
304 | ||
f049052b BG |
305 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
306 | "RSN: no PMKSA entry found - trigger " | |
307 | "full EAP authentication"); | |
6fc6879b JM |
308 | buf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_START, |
309 | NULL, 0, &buflen, NULL); | |
310 | if (buf) { | |
311 | wpa_sm_ether_send(sm, sm->bssid, ETH_P_EAPOL, | |
312 | buf, buflen); | |
313 | os_free(buf); | |
b4a1256d | 314 | return -2; |
6fc6879b JM |
315 | } |
316 | ||
317 | return -1; | |
318 | } | |
319 | ||
320 | return 0; | |
321 | } | |
322 | ||
323 | ||
324 | /** | |
325 | * wpa_supplicant_send_2_of_4 - Send message 2 of WPA/RSN 4-Way Handshake | |
326 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
327 | * @dst: Destination address for the frame | |
328 | * @key: Pointer to the EAPOL-Key frame header | |
329 | * @ver: Version bits from EAPOL-Key Key Info | |
330 | * @nonce: Nonce value for the EAPOL-Key frame | |
331 | * @wpa_ie: WPA/RSN IE | |
332 | * @wpa_ie_len: Length of the WPA/RSN IE | |
333 | * @ptk: PTK to use for keyed hash and encryption | |
c93b7e18 | 334 | * Returns: >= 0 on success, < 0 on failure |
6fc6879b JM |
335 | */ |
336 | int wpa_supplicant_send_2_of_4(struct wpa_sm *sm, const unsigned char *dst, | |
337 | const struct wpa_eapol_key *key, | |
338 | int ver, const u8 *nonce, | |
339 | const u8 *wpa_ie, size_t wpa_ie_len, | |
340 | struct wpa_ptk *ptk) | |
341 | { | |
5e3b5197 | 342 | size_t mic_len, hdrlen, rlen; |
6fc6879b | 343 | struct wpa_eapol_key *reply; |
5e3b5197 JM |
344 | struct wpa_eapol_key_192 *reply192; |
345 | u8 *rbuf, *key_mic; | |
26e23750 | 346 | u8 *rsn_ie_buf = NULL; |
6fc6879b JM |
347 | |
348 | if (wpa_ie == NULL) { | |
f049052b BG |
349 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No wpa_ie set - " |
350 | "cannot generate msg 2/4"); | |
6fc6879b JM |
351 | return -1; |
352 | } | |
353 | ||
26e23750 JM |
354 | #ifdef CONFIG_IEEE80211R |
355 | if (wpa_key_mgmt_ft(sm->key_mgmt)) { | |
356 | int res; | |
357 | ||
55046414 JM |
358 | /* |
359 | * Add PMKR1Name into RSN IE (PMKID-List) and add MDIE and | |
360 | * FTIE from (Re)Association Response. | |
361 | */ | |
362 | rsn_ie_buf = os_malloc(wpa_ie_len + 2 + 2 + PMKID_LEN + | |
363 | sm->assoc_resp_ies_len); | |
26e23750 JM |
364 | if (rsn_ie_buf == NULL) |
365 | return -1; | |
366 | os_memcpy(rsn_ie_buf, wpa_ie, wpa_ie_len); | |
367 | res = wpa_insert_pmkid(rsn_ie_buf, wpa_ie_len, | |
368 | sm->pmk_r1_name); | |
369 | if (res < 0) { | |
370 | os_free(rsn_ie_buf); | |
371 | return -1; | |
372 | } | |
55046414 JM |
373 | wpa_ie_len += res; |
374 | ||
375 | if (sm->assoc_resp_ies) { | |
376 | os_memcpy(rsn_ie_buf + wpa_ie_len, sm->assoc_resp_ies, | |
377 | sm->assoc_resp_ies_len); | |
378 | wpa_ie_len += sm->assoc_resp_ies_len; | |
379 | } | |
26e23750 JM |
380 | |
381 | wpa_ie = rsn_ie_buf; | |
26e23750 JM |
382 | } |
383 | #endif /* CONFIG_IEEE80211R */ | |
384 | ||
6fc6879b JM |
385 | wpa_hexdump(MSG_DEBUG, "WPA: WPA IE for msg 2/4", wpa_ie, wpa_ie_len); |
386 | ||
5e3b5197 JM |
387 | mic_len = wpa_mic_len(sm->key_mgmt); |
388 | hdrlen = mic_len == 24 ? sizeof(*reply192) : sizeof(*reply); | |
6fc6879b | 389 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, |
5e3b5197 | 390 | NULL, hdrlen + wpa_ie_len, |
6fc6879b | 391 | &rlen, (void *) &reply); |
26e23750 JM |
392 | if (rbuf == NULL) { |
393 | os_free(rsn_ie_buf); | |
6fc6879b | 394 | return -1; |
26e23750 | 395 | } |
5e3b5197 | 396 | reply192 = (struct wpa_eapol_key_192 *) reply; |
6fc6879b | 397 | |
a14896e8 JM |
398 | reply->type = (sm->proto == WPA_PROTO_RSN || |
399 | sm->proto == WPA_PROTO_OSEN) ? | |
6fc6879b JM |
400 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; |
401 | WPA_PUT_BE16(reply->key_info, | |
402 | ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_MIC); | |
a14896e8 | 403 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) |
6fc6879b JM |
404 | WPA_PUT_BE16(reply->key_length, 0); |
405 | else | |
406 | os_memcpy(reply->key_length, key->key_length, 2); | |
407 | os_memcpy(reply->replay_counter, key->replay_counter, | |
408 | WPA_REPLAY_COUNTER_LEN); | |
bc8318ac JM |
409 | wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter", reply->replay_counter, |
410 | WPA_REPLAY_COUNTER_LEN); | |
6fc6879b | 411 | |
5e3b5197 JM |
412 | key_mic = reply192->key_mic; /* same offset for reply and reply192 */ |
413 | if (mic_len == 24) { | |
414 | WPA_PUT_BE16(reply192->key_data_length, wpa_ie_len); | |
415 | os_memcpy(reply192 + 1, wpa_ie, wpa_ie_len); | |
416 | } else { | |
417 | WPA_PUT_BE16(reply->key_data_length, wpa_ie_len); | |
418 | os_memcpy(reply + 1, wpa_ie, wpa_ie_len); | |
419 | } | |
26e23750 | 420 | os_free(rsn_ie_buf); |
6fc6879b JM |
421 | |
422 | os_memcpy(reply->key_nonce, nonce, WPA_NONCE_LEN); | |
423 | ||
f049052b | 424 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/4"); |
c93b7e18 AA |
425 | return wpa_eapol_key_send(sm, ptk->kck, ptk->kck_len, ver, dst, |
426 | ETH_P_EAPOL, rbuf, rlen, key_mic); | |
6fc6879b JM |
427 | } |
428 | ||
429 | ||
430 | static int wpa_derive_ptk(struct wpa_sm *sm, const unsigned char *src_addr, | |
98cd3d1c | 431 | const struct wpa_eapol_key *key, struct wpa_ptk *ptk) |
6fc6879b JM |
432 | { |
433 | #ifdef CONFIG_IEEE80211R | |
56586197 | 434 | if (wpa_key_mgmt_ft(sm->key_mgmt)) |
98cd3d1c | 435 | return wpa_derive_ptk_ft(sm, src_addr, key, ptk); |
6fc6879b JM |
436 | #endif /* CONFIG_IEEE80211R */ |
437 | ||
98cd3d1c JM |
438 | return wpa_pmk_to_ptk(sm->pmk, sm->pmk_len, "Pairwise key expansion", |
439 | sm->own_addr, sm->bssid, sm->snonce, | |
440 | key->key_nonce, ptk, sm->key_mgmt, | |
441 | sm->pairwise_cipher); | |
6fc6879b JM |
442 | } |
443 | ||
444 | ||
445 | static void wpa_supplicant_process_1_of_4(struct wpa_sm *sm, | |
446 | const unsigned char *src_addr, | |
447 | const struct wpa_eapol_key *key, | |
e6270129 JM |
448 | u16 ver, const u8 *key_data, |
449 | size_t key_data_len) | |
6fc6879b JM |
450 | { |
451 | struct wpa_eapol_ie_parse ie; | |
452 | struct wpa_ptk *ptk; | |
b4a1256d | 453 | int res; |
25ef8529 JM |
454 | u8 *kde, *kde_buf = NULL; |
455 | size_t kde_len; | |
6fc6879b JM |
456 | |
457 | if (wpa_sm_get_network_ctx(sm) == NULL) { | |
f049052b BG |
458 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No SSID info " |
459 | "found (msg 1 of 4)"); | |
6fc6879b JM |
460 | return; |
461 | } | |
462 | ||
463 | wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE); | |
f049052b BG |
464 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of 4-Way " |
465 | "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver); | |
6fc6879b JM |
466 | |
467 | os_memset(&ie, 0, sizeof(ie)); | |
468 | ||
a14896e8 | 469 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { |
6fc6879b | 470 | /* RSN: msg 1/4 should contain PMKID for the selected PMK */ |
e6270129 JM |
471 | wpa_hexdump(MSG_DEBUG, "RSN: msg 1/4 key data", |
472 | key_data, key_data_len); | |
473 | if (wpa_supplicant_parse_ies(key_data, key_data_len, &ie) < 0) | |
d627a939 | 474 | goto failed; |
6fc6879b JM |
475 | if (ie.pmkid) { |
476 | wpa_hexdump(MSG_DEBUG, "RSN: PMKID from " | |
477 | "Authenticator", ie.pmkid, PMKID_LEN); | |
478 | } | |
479 | } | |
6fc6879b | 480 | |
b4a1256d JM |
481 | res = wpa_supplicant_get_pmk(sm, src_addr, ie.pmkid); |
482 | if (res == -2) { | |
f049052b BG |
483 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: Do not reply to " |
484 | "msg 1/4 - requesting full EAP authentication"); | |
b4a1256d JM |
485 | return; |
486 | } | |
487 | if (res) | |
83935317 | 488 | goto failed; |
6fc6879b JM |
489 | |
490 | if (sm->renew_snonce) { | |
3642c431 | 491 | if (random_get_bytes(sm->snonce, WPA_NONCE_LEN)) { |
0f057fb2 | 492 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
6fc6879b | 493 | "WPA: Failed to get random data for SNonce"); |
83935317 | 494 | goto failed; |
6fc6879b JM |
495 | } |
496 | sm->renew_snonce = 0; | |
497 | wpa_hexdump(MSG_DEBUG, "WPA: Renewed SNonce", | |
498 | sm->snonce, WPA_NONCE_LEN); | |
499 | } | |
500 | ||
501 | /* Calculate PTK which will be stored as a temporary PTK until it has | |
502 | * been verified when processing message 3/4. */ | |
503 | ptk = &sm->tptk; | |
504 | wpa_derive_ptk(sm, src_addr, key, ptk); | |
3b9c5176 | 505 | if (sm->pairwise_cipher == WPA_CIPHER_TKIP) { |
d2c33b91 | 506 | u8 buf[8]; |
3b9c5176 | 507 | /* Supplicant: swap tx/rx Mic keys */ |
98cd3d1c JM |
508 | os_memcpy(buf, &ptk->tk[16], 8); |
509 | os_memcpy(&ptk->tk[16], &ptk->tk[24], 8); | |
510 | os_memcpy(&ptk->tk[24], buf, 8); | |
d2c33b91 | 511 | os_memset(buf, 0, sizeof(buf)); |
3b9c5176 | 512 | } |
6fc6879b | 513 | sm->tptk_set = 1; |
ad00d64e | 514 | sm->tk_to_set = 1; |
6fc6879b | 515 | |
25ef8529 JM |
516 | kde = sm->assoc_wpa_ie; |
517 | kde_len = sm->assoc_wpa_ie_len; | |
518 | ||
519 | #ifdef CONFIG_P2P | |
520 | if (sm->p2p) { | |
521 | kde_buf = os_malloc(kde_len + 2 + RSN_SELECTOR_LEN + 1); | |
522 | if (kde_buf) { | |
523 | u8 *pos; | |
524 | wpa_printf(MSG_DEBUG, "P2P: Add IP Address Request KDE " | |
525 | "into EAPOL-Key 2/4"); | |
526 | os_memcpy(kde_buf, kde, kde_len); | |
527 | kde = kde_buf; | |
528 | pos = kde + kde_len; | |
529 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
530 | *pos++ = RSN_SELECTOR_LEN + 1; | |
531 | RSN_SELECTOR_PUT(pos, WFA_KEY_DATA_IP_ADDR_REQ); | |
532 | pos += RSN_SELECTOR_LEN; | |
533 | *pos++ = 0x01; | |
534 | kde_len = pos - kde; | |
535 | } | |
536 | } | |
537 | #endif /* CONFIG_P2P */ | |
538 | ||
6fc6879b | 539 | if (wpa_supplicant_send_2_of_4(sm, sm->bssid, key, ver, sm->snonce, |
c93b7e18 | 540 | kde, kde_len, ptk) < 0) |
83935317 | 541 | goto failed; |
6fc6879b | 542 | |
25ef8529 | 543 | os_free(kde_buf); |
6fc6879b | 544 | os_memcpy(sm->anonce, key->key_nonce, WPA_NONCE_LEN); |
83935317 JM |
545 | return; |
546 | ||
547 | failed: | |
25ef8529 | 548 | os_free(kde_buf); |
83935317 | 549 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); |
6fc6879b JM |
550 | } |
551 | ||
552 | ||
553 | static void wpa_sm_start_preauth(void *eloop_ctx, void *timeout_ctx) | |
554 | { | |
555 | struct wpa_sm *sm = eloop_ctx; | |
556 | rsn_preauth_candidate_process(sm); | |
557 | } | |
558 | ||
559 | ||
560 | static void wpa_supplicant_key_neg_complete(struct wpa_sm *sm, | |
561 | const u8 *addr, int secure) | |
562 | { | |
0f057fb2 JM |
563 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
564 | "WPA: Key negotiation completed with " | |
6fc6879b JM |
565 | MACSTR " [PTK=%s GTK=%s]", MAC2STR(addr), |
566 | wpa_cipher_txt(sm->pairwise_cipher), | |
567 | wpa_cipher_txt(sm->group_cipher)); | |
6fc6879b JM |
568 | wpa_sm_cancel_auth_timeout(sm); |
569 | wpa_sm_set_state(sm, WPA_COMPLETED); | |
570 | ||
571 | if (secure) { | |
572 | wpa_sm_mlme_setprotection( | |
573 | sm, addr, MLME_SETPROTECTION_PROTECT_TYPE_RX_TX, | |
574 | MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); | |
575 | eapol_sm_notify_portValid(sm->eapol, TRUE); | |
56586197 | 576 | if (wpa_key_mgmt_wpa_psk(sm->key_mgmt)) |
6fc6879b JM |
577 | eapol_sm_notify_eap_success(sm->eapol, TRUE); |
578 | /* | |
579 | * Start preauthentication after a short wait to avoid a | |
580 | * possible race condition between the data receive and key | |
581 | * configuration after the 4-Way Handshake. This increases the | |
ffbf1eaa | 582 | * likelihood of the first preauth EAPOL-Start frame getting to |
6fc6879b JM |
583 | * the target AP. |
584 | */ | |
585 | eloop_register_timeout(1, 0, wpa_sm_start_preauth, sm, NULL); | |
586 | } | |
587 | ||
588 | if (sm->cur_pmksa && sm->cur_pmksa->opportunistic) { | |
f049052b BG |
589 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
590 | "RSN: Authenticator accepted " | |
591 | "opportunistic PMKSA entry - marking it valid"); | |
6fc6879b JM |
592 | sm->cur_pmksa->opportunistic = 0; |
593 | } | |
594 | ||
595 | #ifdef CONFIG_IEEE80211R | |
56586197 | 596 | if (wpa_key_mgmt_ft(sm->key_mgmt)) { |
6fc6879b | 597 | /* Prepare for the next transition */ |
76b7981d | 598 | wpa_ft_prepare_auth_request(sm, NULL); |
6fc6879b JM |
599 | } |
600 | #endif /* CONFIG_IEEE80211R */ | |
601 | } | |
602 | ||
603 | ||
581a8cde JM |
604 | static void wpa_sm_rekey_ptk(void *eloop_ctx, void *timeout_ctx) |
605 | { | |
606 | struct wpa_sm *sm = eloop_ctx; | |
f049052b | 607 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Request PTK rekeying"); |
581a8cde JM |
608 | wpa_sm_key_request(sm, 0, 1); |
609 | } | |
610 | ||
611 | ||
6fc6879b JM |
612 | static int wpa_supplicant_install_ptk(struct wpa_sm *sm, |
613 | const struct wpa_eapol_key *key) | |
614 | { | |
615 | int keylen, rsclen; | |
71934751 | 616 | enum wpa_alg alg; |
6fc6879b | 617 | const u8 *key_rsc; |
6fc6879b | 618 | |
ad00d64e JM |
619 | if (!sm->tk_to_set) { |
620 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
621 | "WPA: Do not re-install same PTK to the driver"); | |
622 | return 0; | |
623 | } | |
624 | ||
f049052b BG |
625 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
626 | "WPA: Installing PTK to the driver"); | |
6fc6879b | 627 | |
c3550295 | 628 | if (sm->pairwise_cipher == WPA_CIPHER_NONE) { |
f049052b BG |
629 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Pairwise Cipher " |
630 | "Suite: NONE - do not use pairwise keys"); | |
6fc6879b | 631 | return 0; |
c3550295 JM |
632 | } |
633 | ||
634 | if (!wpa_cipher_valid_pairwise(sm->pairwise_cipher)) { | |
f049052b BG |
635 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
636 | "WPA: Unsupported pairwise cipher %d", | |
637 | sm->pairwise_cipher); | |
6fc6879b JM |
638 | return -1; |
639 | } | |
640 | ||
c3550295 JM |
641 | alg = wpa_cipher_to_alg(sm->pairwise_cipher); |
642 | keylen = wpa_cipher_key_len(sm->pairwise_cipher); | |
643 | rsclen = wpa_cipher_rsc_len(sm->pairwise_cipher); | |
644 | ||
a14896e8 | 645 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { |
6fc6879b JM |
646 | key_rsc = null_rsc; |
647 | } else { | |
648 | key_rsc = key->key_rsc; | |
649 | wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, rsclen); | |
650 | } | |
651 | ||
652 | if (wpa_sm_set_key(sm, alg, sm->bssid, 0, 1, key_rsc, rsclen, | |
98cd3d1c | 653 | sm->ptk.tk, keylen) < 0) { |
f049052b BG |
654 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
655 | "WPA: Failed to set PTK to the " | |
656 | "driver (alg=%d keylen=%d bssid=" MACSTR ")", | |
657 | alg, keylen, MAC2STR(sm->bssid)); | |
6fc6879b JM |
658 | return -1; |
659 | } | |
581a8cde | 660 | |
7d711541 | 661 | /* TK is not needed anymore in supplicant */ |
98cd3d1c | 662 | os_memset(sm->ptk.tk, 0, WPA_TK_MAX_LEN); |
ad00d64e | 663 | sm->tk_to_set = 0; |
7d711541 | 664 | |
581a8cde JM |
665 | if (sm->wpa_ptk_rekey) { |
666 | eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); | |
667 | eloop_register_timeout(sm->wpa_ptk_rekey, 0, wpa_sm_rekey_ptk, | |
668 | sm, NULL); | |
669 | } | |
670 | ||
6fc6879b JM |
671 | return 0; |
672 | } | |
673 | ||
674 | ||
f049052b BG |
675 | static int wpa_supplicant_check_group_cipher(struct wpa_sm *sm, |
676 | int group_cipher, | |
6fc6879b | 677 | int keylen, int maxkeylen, |
71934751 JM |
678 | int *key_rsc_len, |
679 | enum wpa_alg *alg) | |
6fc6879b | 680 | { |
c3550295 | 681 | int klen; |
6fc6879b | 682 | |
c3550295 JM |
683 | *alg = wpa_cipher_to_alg(group_cipher); |
684 | if (*alg == WPA_ALG_NONE) { | |
f049052b BG |
685 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
686 | "WPA: Unsupported Group Cipher %d", | |
687 | group_cipher); | |
6fc6879b JM |
688 | return -1; |
689 | } | |
c3550295 | 690 | *key_rsc_len = wpa_cipher_rsc_len(group_cipher); |
6fc6879b | 691 | |
c3550295 JM |
692 | klen = wpa_cipher_key_len(group_cipher); |
693 | if (keylen != klen || maxkeylen < klen) { | |
f049052b BG |
694 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
695 | "WPA: Unsupported %s Group Cipher key length %d (%d)", | |
696 | wpa_cipher_txt(group_cipher), keylen, maxkeylen); | |
c3550295 | 697 | return -1; |
6fc6879b | 698 | } |
c3550295 | 699 | return 0; |
6fc6879b JM |
700 | } |
701 | ||
702 | ||
703 | struct wpa_gtk_data { | |
71934751 | 704 | enum wpa_alg alg; |
6fc6879b JM |
705 | int tx, key_rsc_len, keyidx; |
706 | u8 gtk[32]; | |
707 | int gtk_len; | |
708 | }; | |
709 | ||
710 | ||
711 | static int wpa_supplicant_install_gtk(struct wpa_sm *sm, | |
712 | const struct wpa_gtk_data *gd, | |
713 | const u8 *key_rsc) | |
714 | { | |
715 | const u8 *_gtk = gd->gtk; | |
716 | u8 gtk_buf[32]; | |
717 | ||
718 | wpa_hexdump_key(MSG_DEBUG, "WPA: Group Key", gd->gtk, gd->gtk_len); | |
f049052b BG |
719 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
720 | "WPA: Installing GTK to the driver (keyidx=%d tx=%d len=%d)", | |
721 | gd->keyidx, gd->tx, gd->gtk_len); | |
6fc6879b JM |
722 | wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, gd->key_rsc_len); |
723 | if (sm->group_cipher == WPA_CIPHER_TKIP) { | |
724 | /* Swap Tx/Rx keys for Michael MIC */ | |
725 | os_memcpy(gtk_buf, gd->gtk, 16); | |
726 | os_memcpy(gtk_buf + 16, gd->gtk + 24, 8); | |
727 | os_memcpy(gtk_buf + 24, gd->gtk + 16, 8); | |
728 | _gtk = gtk_buf; | |
729 | } | |
730 | if (sm->pairwise_cipher == WPA_CIPHER_NONE) { | |
0382097e | 731 | if (wpa_sm_set_key(sm, gd->alg, NULL, |
6fc6879b JM |
732 | gd->keyidx, 1, key_rsc, gd->key_rsc_len, |
733 | _gtk, gd->gtk_len) < 0) { | |
f049052b BG |
734 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
735 | "WPA: Failed to set GTK to the driver " | |
736 | "(Group only)"); | |
d2c33b91 | 737 | os_memset(gtk_buf, 0, sizeof(gtk_buf)); |
6fc6879b JM |
738 | return -1; |
739 | } | |
0382097e | 740 | } else if (wpa_sm_set_key(sm, gd->alg, broadcast_ether_addr, |
6fc6879b JM |
741 | gd->keyidx, gd->tx, key_rsc, gd->key_rsc_len, |
742 | _gtk, gd->gtk_len) < 0) { | |
f049052b BG |
743 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
744 | "WPA: Failed to set GTK to " | |
745 | "the driver (alg=%d keylen=%d keyidx=%d)", | |
746 | gd->alg, gd->gtk_len, gd->keyidx); | |
d2c33b91 | 747 | os_memset(gtk_buf, 0, sizeof(gtk_buf)); |
6fc6879b JM |
748 | return -1; |
749 | } | |
d2c33b91 | 750 | os_memset(gtk_buf, 0, sizeof(gtk_buf)); |
6fc6879b JM |
751 | |
752 | return 0; | |
753 | } | |
754 | ||
755 | ||
756 | static int wpa_supplicant_gtk_tx_bit_workaround(const struct wpa_sm *sm, | |
757 | int tx) | |
758 | { | |
759 | if (tx && sm->pairwise_cipher != WPA_CIPHER_NONE) { | |
760 | /* Ignore Tx bit for GTK if a pairwise key is used. One AP | |
761 | * seemed to set this bit (incorrectly, since Tx is only when | |
762 | * doing Group Key only APs) and without this workaround, the | |
763 | * data connection does not work because wpa_supplicant | |
764 | * configured non-zero keyidx to be used for unicast. */ | |
f049052b BG |
765 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
766 | "WPA: Tx bit set for GTK, but pairwise " | |
767 | "keys are used - ignore Tx bit"); | |
6fc6879b JM |
768 | return 0; |
769 | } | |
770 | return tx; | |
771 | } | |
772 | ||
773 | ||
73ed03f3 MS |
774 | static int wpa_supplicant_rsc_relaxation(const struct wpa_sm *sm, |
775 | const u8 *rsc) | |
776 | { | |
777 | int rsclen; | |
778 | ||
779 | if (!sm->wpa_rsc_relaxation) | |
780 | return 0; | |
781 | ||
782 | rsclen = wpa_cipher_rsc_len(sm->group_cipher); | |
783 | ||
784 | /* | |
785 | * Try to detect RSC (endian) corruption issue where the AP sends | |
786 | * the RSC bytes in EAPOL-Key message in the wrong order, both if | |
787 | * it's actually a 6-byte field (as it should be) and if it treats | |
788 | * it as an 8-byte field. | |
789 | * An AP model known to have this bug is the Sapido RB-1632. | |
790 | */ | |
791 | if (rsclen == 6 && ((rsc[5] && !rsc[0]) || rsc[6] || rsc[7])) { | |
792 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, | |
793 | "RSC %02x%02x%02x%02x%02x%02x%02x%02x is likely bogus, using 0", | |
794 | rsc[0], rsc[1], rsc[2], rsc[3], | |
795 | rsc[4], rsc[5], rsc[6], rsc[7]); | |
796 | ||
797 | return 1; | |
798 | } | |
799 | ||
800 | return 0; | |
801 | } | |
802 | ||
803 | ||
6fc6879b JM |
804 | static int wpa_supplicant_pairwise_gtk(struct wpa_sm *sm, |
805 | const struct wpa_eapol_key *key, | |
806 | const u8 *gtk, size_t gtk_len, | |
807 | int key_info) | |
808 | { | |
6fc6879b | 809 | struct wpa_gtk_data gd; |
73ed03f3 | 810 | const u8 *key_rsc; |
6fc6879b JM |
811 | |
812 | /* | |
813 | * IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames - Figure 43x | |
814 | * GTK KDE format: | |
815 | * KeyID[bits 0-1], Tx [bit 2], Reserved [bits 3-7] | |
816 | * Reserved [bits 0-7] | |
817 | * GTK | |
818 | */ | |
819 | ||
820 | os_memset(&gd, 0, sizeof(gd)); | |
821 | wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in pairwise handshake", | |
822 | gtk, gtk_len); | |
823 | ||
824 | if (gtk_len < 2 || gtk_len - 2 > sizeof(gd.gtk)) | |
825 | return -1; | |
826 | ||
827 | gd.keyidx = gtk[0] & 0x3; | |
828 | gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm, | |
829 | !!(gtk[0] & BIT(2))); | |
830 | gtk += 2; | |
831 | gtk_len -= 2; | |
832 | ||
833 | os_memcpy(gd.gtk, gtk, gtk_len); | |
834 | gd.gtk_len = gtk_len; | |
835 | ||
73ed03f3 MS |
836 | key_rsc = key->key_rsc; |
837 | if (wpa_supplicant_rsc_relaxation(sm, key->key_rsc)) | |
838 | key_rsc = null_rsc; | |
839 | ||
dff1e285 JM |
840 | if (sm->group_cipher != WPA_CIPHER_GTK_NOT_USED && |
841 | (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, | |
842 | gtk_len, gtk_len, | |
843 | &gd.key_rsc_len, &gd.alg) || | |
73ed03f3 | 844 | wpa_supplicant_install_gtk(sm, &gd, key_rsc))) { |
f049052b BG |
845 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
846 | "RSN: Failed to install GTK"); | |
d2c33b91 | 847 | os_memset(&gd, 0, sizeof(gd)); |
6fc6879b JM |
848 | return -1; |
849 | } | |
d2c33b91 | 850 | os_memset(&gd, 0, sizeof(gd)); |
6fc6879b JM |
851 | |
852 | wpa_supplicant_key_neg_complete(sm, sm->bssid, | |
853 | key_info & WPA_KEY_INFO_SECURE); | |
854 | return 0; | |
6fc6879b JM |
855 | } |
856 | ||
857 | ||
858 | static int ieee80211w_set_keys(struct wpa_sm *sm, | |
859 | struct wpa_eapol_ie_parse *ie) | |
860 | { | |
861 | #ifdef CONFIG_IEEE80211W | |
8dd9f9cd | 862 | if (!wpa_cipher_valid_mgmt_group(sm->mgmt_group_cipher)) |
6fc6879b JM |
863 | return 0; |
864 | ||
865 | if (ie->igtk) { | |
8dd9f9cd | 866 | size_t len; |
6fc6879b JM |
867 | const struct wpa_igtk_kde *igtk; |
868 | u16 keyidx; | |
8dd9f9cd JM |
869 | len = wpa_cipher_key_len(sm->mgmt_group_cipher); |
870 | if (ie->igtk_len != WPA_IGTK_KDE_PREFIX_LEN + len) | |
6fc6879b JM |
871 | return -1; |
872 | igtk = (const struct wpa_igtk_kde *) ie->igtk; | |
873 | keyidx = WPA_GET_LE16(igtk->keyid); | |
f049052b BG |
874 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: IGTK keyid %d " |
875 | "pn %02x%02x%02x%02x%02x%02x", | |
876 | keyidx, MAC2STR(igtk->pn)); | |
6fc6879b | 877 | wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK", |
8dd9f9cd | 878 | igtk->igtk, len); |
6fc6879b | 879 | if (keyidx > 4095) { |
f049052b BG |
880 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
881 | "WPA: Invalid IGTK KeyID %d", keyidx); | |
6fc6879b JM |
882 | return -1; |
883 | } | |
8dd9f9cd JM |
884 | if (wpa_sm_set_key(sm, wpa_cipher_to_alg(sm->mgmt_group_cipher), |
885 | broadcast_ether_addr, | |
6fc6879b | 886 | keyidx, 0, igtk->pn, sizeof(igtk->pn), |
8dd9f9cd | 887 | igtk->igtk, len) < 0) { |
f049052b BG |
888 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
889 | "WPA: Failed to configure IGTK to the driver"); | |
6fc6879b JM |
890 | return -1; |
891 | } | |
892 | } | |
893 | ||
894 | return 0; | |
895 | #else /* CONFIG_IEEE80211W */ | |
896 | return 0; | |
897 | #endif /* CONFIG_IEEE80211W */ | |
898 | } | |
899 | ||
900 | ||
901 | static void wpa_report_ie_mismatch(struct wpa_sm *sm, | |
902 | const char *reason, const u8 *src_addr, | |
903 | const u8 *wpa_ie, size_t wpa_ie_len, | |
904 | const u8 *rsn_ie, size_t rsn_ie_len) | |
905 | { | |
0f057fb2 | 906 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: %s (src=" MACSTR ")", |
6fc6879b JM |
907 | reason, MAC2STR(src_addr)); |
908 | ||
909 | if (sm->ap_wpa_ie) { | |
910 | wpa_hexdump(MSG_INFO, "WPA: WPA IE in Beacon/ProbeResp", | |
911 | sm->ap_wpa_ie, sm->ap_wpa_ie_len); | |
912 | } | |
913 | if (wpa_ie) { | |
914 | if (!sm->ap_wpa_ie) { | |
f049052b BG |
915 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
916 | "WPA: No WPA IE in Beacon/ProbeResp"); | |
6fc6879b JM |
917 | } |
918 | wpa_hexdump(MSG_INFO, "WPA: WPA IE in 3/4 msg", | |
919 | wpa_ie, wpa_ie_len); | |
920 | } | |
921 | ||
922 | if (sm->ap_rsn_ie) { | |
923 | wpa_hexdump(MSG_INFO, "WPA: RSN IE in Beacon/ProbeResp", | |
924 | sm->ap_rsn_ie, sm->ap_rsn_ie_len); | |
925 | } | |
926 | if (rsn_ie) { | |
927 | if (!sm->ap_rsn_ie) { | |
f049052b BG |
928 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
929 | "WPA: No RSN IE in Beacon/ProbeResp"); | |
6fc6879b JM |
930 | } |
931 | wpa_hexdump(MSG_INFO, "WPA: RSN IE in 3/4 msg", | |
932 | rsn_ie, rsn_ie_len); | |
933 | } | |
934 | ||
3da372fa | 935 | wpa_sm_deauthenticate(sm, WLAN_REASON_IE_IN_4WAY_DIFFERS); |
6fc6879b JM |
936 | } |
937 | ||
938 | ||
5af8187e JM |
939 | #ifdef CONFIG_IEEE80211R |
940 | ||
941 | static int ft_validate_mdie(struct wpa_sm *sm, | |
942 | const unsigned char *src_addr, | |
3b4f6dac JM |
943 | struct wpa_eapol_ie_parse *ie, |
944 | const u8 *assoc_resp_mdie) | |
5af8187e JM |
945 | { |
946 | struct rsn_mdie *mdie; | |
947 | ||
5af8187e JM |
948 | mdie = (struct rsn_mdie *) (ie->mdie + 2); |
949 | if (ie->mdie == NULL || ie->mdie_len < 2 + sizeof(*mdie) || | |
950 | os_memcmp(mdie->mobility_domain, sm->mobility_domain, | |
951 | MOBILITY_DOMAIN_ID_LEN) != 0) { | |
f049052b BG |
952 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE in msg 3/4 did " |
953 | "not match with the current mobility domain"); | |
5af8187e JM |
954 | return -1; |
955 | } | |
956 | ||
3b4f6dac JM |
957 | if (assoc_resp_mdie && |
958 | (assoc_resp_mdie[1] != ie->mdie[1] || | |
959 | os_memcmp(assoc_resp_mdie, ie->mdie, 2 + ie->mdie[1]) != 0)) { | |
f049052b | 960 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE mismatch"); |
3b4f6dac JM |
961 | wpa_hexdump(MSG_DEBUG, "FT: MDIE in EAPOL-Key msg 3/4", |
962 | ie->mdie, 2 + ie->mdie[1]); | |
963 | wpa_hexdump(MSG_DEBUG, "FT: MDIE in (Re)Association Response", | |
964 | assoc_resp_mdie, 2 + assoc_resp_mdie[1]); | |
965 | return -1; | |
966 | } | |
967 | ||
968 | return 0; | |
969 | } | |
970 | ||
971 | ||
972 | static int ft_validate_ftie(struct wpa_sm *sm, | |
973 | const unsigned char *src_addr, | |
974 | struct wpa_eapol_ie_parse *ie, | |
975 | const u8 *assoc_resp_ftie) | |
976 | { | |
977 | if (ie->ftie == NULL) { | |
f049052b BG |
978 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
979 | "FT: No FTIE in EAPOL-Key msg 3/4"); | |
3b4f6dac JM |
980 | return -1; |
981 | } | |
982 | ||
983 | if (assoc_resp_ftie == NULL) | |
984 | return 0; | |
985 | ||
986 | if (assoc_resp_ftie[1] != ie->ftie[1] || | |
987 | os_memcmp(assoc_resp_ftie, ie->ftie, 2 + ie->ftie[1]) != 0) { | |
f049052b | 988 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: FTIE mismatch"); |
3b4f6dac JM |
989 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 3/4", |
990 | ie->ftie, 2 + ie->ftie[1]); | |
991 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)Association Response", | |
992 | assoc_resp_ftie, 2 + assoc_resp_ftie[1]); | |
993 | return -1; | |
994 | } | |
995 | ||
5af8187e JM |
996 | return 0; |
997 | } | |
998 | ||
999 | ||
1000 | static int ft_validate_rsnie(struct wpa_sm *sm, | |
1001 | const unsigned char *src_addr, | |
1002 | struct wpa_eapol_ie_parse *ie) | |
1003 | { | |
1004 | struct wpa_ie_data rsn; | |
1005 | ||
1006 | if (!ie->rsn_ie) | |
1007 | return 0; | |
1008 | ||
1009 | /* | |
1010 | * Verify that PMKR1Name from EAPOL-Key message 3/4 | |
1011 | * matches with the value we derived. | |
1012 | */ | |
1013 | if (wpa_parse_wpa_ie_rsn(ie->rsn_ie, ie->rsn_ie_len, &rsn) < 0 || | |
1014 | rsn.num_pmkid != 1 || rsn.pmkid == NULL) { | |
f049052b BG |
1015 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: No PMKR1Name in " |
1016 | "FT 4-way handshake message 3/4"); | |
5af8187e JM |
1017 | return -1; |
1018 | } | |
1019 | ||
0d15b69f JM |
1020 | if (os_memcmp_const(rsn.pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0) |
1021 | { | |
f049052b BG |
1022 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1023 | "FT: PMKR1Name mismatch in " | |
1024 | "FT 4-way handshake message 3/4"); | |
5af8187e JM |
1025 | wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Authenticator", |
1026 | rsn.pmkid, WPA_PMK_NAME_LEN); | |
1027 | wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name", | |
1028 | sm->pmk_r1_name, WPA_PMK_NAME_LEN); | |
1029 | return -1; | |
1030 | } | |
1031 | ||
1032 | return 0; | |
1033 | } | |
1034 | ||
1035 | ||
1036 | static int wpa_supplicant_validate_ie_ft(struct wpa_sm *sm, | |
1037 | const unsigned char *src_addr, | |
1038 | struct wpa_eapol_ie_parse *ie) | |
1039 | { | |
3b4f6dac JM |
1040 | const u8 *pos, *end, *mdie = NULL, *ftie = NULL; |
1041 | ||
1042 | if (sm->assoc_resp_ies) { | |
1043 | pos = sm->assoc_resp_ies; | |
1044 | end = pos + sm->assoc_resp_ies_len; | |
2461724c JM |
1045 | while (end - pos > 2) { |
1046 | if (2 + pos[1] > end - pos) | |
3b4f6dac JM |
1047 | break; |
1048 | switch (*pos) { | |
1049 | case WLAN_EID_MOBILITY_DOMAIN: | |
1050 | mdie = pos; | |
1051 | break; | |
1052 | case WLAN_EID_FAST_BSS_TRANSITION: | |
1053 | ftie = pos; | |
1054 | break; | |
1055 | } | |
1056 | pos += 2 + pos[1]; | |
1057 | } | |
1058 | } | |
1059 | ||
1060 | if (ft_validate_mdie(sm, src_addr, ie, mdie) < 0 || | |
1061 | ft_validate_ftie(sm, src_addr, ie, ftie) < 0 || | |
5af8187e JM |
1062 | ft_validate_rsnie(sm, src_addr, ie) < 0) |
1063 | return -1; | |
1064 | ||
1065 | return 0; | |
1066 | } | |
1067 | ||
1068 | #endif /* CONFIG_IEEE80211R */ | |
1069 | ||
1070 | ||
6fc6879b JM |
1071 | static int wpa_supplicant_validate_ie(struct wpa_sm *sm, |
1072 | const unsigned char *src_addr, | |
1073 | struct wpa_eapol_ie_parse *ie) | |
1074 | { | |
1075 | if (sm->ap_wpa_ie == NULL && sm->ap_rsn_ie == NULL) { | |
f049052b BG |
1076 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1077 | "WPA: No WPA/RSN IE for this AP known. " | |
1078 | "Trying to get from scan results"); | |
6fc6879b | 1079 | if (wpa_sm_get_beacon_ie(sm) < 0) { |
f049052b BG |
1080 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1081 | "WPA: Could not find AP from " | |
1082 | "the scan results"); | |
6fc6879b | 1083 | } else { |
f049052b BG |
1084 | wpa_msg(sm->ctx->msg_ctx, MSG_DEBUG, |
1085 | "WPA: Found the current AP from " | |
1086 | "updated scan results"); | |
6fc6879b JM |
1087 | } |
1088 | } | |
1089 | ||
1090 | if (ie->wpa_ie == NULL && ie->rsn_ie == NULL && | |
1091 | (sm->ap_wpa_ie || sm->ap_rsn_ie)) { | |
1092 | wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " | |
1093 | "with IE in Beacon/ProbeResp (no IE?)", | |
1094 | src_addr, ie->wpa_ie, ie->wpa_ie_len, | |
1095 | ie->rsn_ie, ie->rsn_ie_len); | |
1096 | return -1; | |
1097 | } | |
1098 | ||
1099 | if ((ie->wpa_ie && sm->ap_wpa_ie && | |
1100 | (ie->wpa_ie_len != sm->ap_wpa_ie_len || | |
1101 | os_memcmp(ie->wpa_ie, sm->ap_wpa_ie, ie->wpa_ie_len) != 0)) || | |
1102 | (ie->rsn_ie && sm->ap_rsn_ie && | |
26e23750 JM |
1103 | wpa_compare_rsn_ie(wpa_key_mgmt_ft(sm->key_mgmt), |
1104 | sm->ap_rsn_ie, sm->ap_rsn_ie_len, | |
1105 | ie->rsn_ie, ie->rsn_ie_len))) { | |
6fc6879b JM |
1106 | wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " |
1107 | "with IE in Beacon/ProbeResp", | |
1108 | src_addr, ie->wpa_ie, ie->wpa_ie_len, | |
1109 | ie->rsn_ie, ie->rsn_ie_len); | |
1110 | return -1; | |
1111 | } | |
1112 | ||
1113 | if (sm->proto == WPA_PROTO_WPA && | |
1114 | ie->rsn_ie && sm->ap_rsn_ie == NULL && sm->rsn_enabled) { | |
1115 | wpa_report_ie_mismatch(sm, "Possible downgrade attack " | |
1116 | "detected - RSN was enabled and RSN IE " | |
1117 | "was in msg 3/4, but not in " | |
1118 | "Beacon/ProbeResp", | |
1119 | src_addr, ie->wpa_ie, ie->wpa_ie_len, | |
1120 | ie->rsn_ie, ie->rsn_ie_len); | |
1121 | return -1; | |
1122 | } | |
1123 | ||
1124 | #ifdef CONFIG_IEEE80211R | |
5af8187e JM |
1125 | if (wpa_key_mgmt_ft(sm->key_mgmt) && |
1126 | wpa_supplicant_validate_ie_ft(sm, src_addr, ie) < 0) | |
1127 | return -1; | |
6fc6879b JM |
1128 | #endif /* CONFIG_IEEE80211R */ |
1129 | ||
1130 | return 0; | |
1131 | } | |
1132 | ||
1133 | ||
1134 | /** | |
1135 | * wpa_supplicant_send_4_of_4 - Send message 4 of WPA/RSN 4-Way Handshake | |
1136 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
1137 | * @dst: Destination address for the frame | |
1138 | * @key: Pointer to the EAPOL-Key frame header | |
1139 | * @ver: Version bits from EAPOL-Key Key Info | |
1140 | * @key_info: Key Info | |
6fc6879b | 1141 | * @ptk: PTK to use for keyed hash and encryption |
c93b7e18 | 1142 | * Returns: >= 0 on success, < 0 on failure |
6fc6879b JM |
1143 | */ |
1144 | int wpa_supplicant_send_4_of_4(struct wpa_sm *sm, const unsigned char *dst, | |
1145 | const struct wpa_eapol_key *key, | |
1146 | u16 ver, u16 key_info, | |
6fc6879b JM |
1147 | struct wpa_ptk *ptk) |
1148 | { | |
5e3b5197 | 1149 | size_t mic_len, hdrlen, rlen; |
6fc6879b | 1150 | struct wpa_eapol_key *reply; |
5e3b5197 JM |
1151 | struct wpa_eapol_key_192 *reply192; |
1152 | u8 *rbuf, *key_mic; | |
6fc6879b | 1153 | |
5e3b5197 JM |
1154 | mic_len = wpa_mic_len(sm->key_mgmt); |
1155 | hdrlen = mic_len == 24 ? sizeof(*reply192) : sizeof(*reply); | |
6fc6879b | 1156 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, |
5e3b5197 | 1157 | hdrlen, &rlen, (void *) &reply); |
6fc6879b JM |
1158 | if (rbuf == NULL) |
1159 | return -1; | |
5e3b5197 | 1160 | reply192 = (struct wpa_eapol_key_192 *) reply; |
6fc6879b | 1161 | |
a14896e8 JM |
1162 | reply->type = (sm->proto == WPA_PROTO_RSN || |
1163 | sm->proto == WPA_PROTO_OSEN) ? | |
6fc6879b JM |
1164 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; |
1165 | key_info &= WPA_KEY_INFO_SECURE; | |
1166 | key_info |= ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_MIC; | |
1167 | WPA_PUT_BE16(reply->key_info, key_info); | |
a14896e8 | 1168 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) |
6fc6879b JM |
1169 | WPA_PUT_BE16(reply->key_length, 0); |
1170 | else | |
1171 | os_memcpy(reply->key_length, key->key_length, 2); | |
1172 | os_memcpy(reply->replay_counter, key->replay_counter, | |
1173 | WPA_REPLAY_COUNTER_LEN); | |
1174 | ||
5e3b5197 JM |
1175 | key_mic = reply192->key_mic; /* same offset for reply and reply192 */ |
1176 | if (mic_len == 24) | |
1177 | WPA_PUT_BE16(reply192->key_data_length, 0); | |
1178 | else | |
1179 | WPA_PUT_BE16(reply->key_data_length, 0); | |
6fc6879b | 1180 | |
f049052b | 1181 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 4/4"); |
c93b7e18 AA |
1182 | return wpa_eapol_key_send(sm, ptk->kck, ptk->kck_len, ver, dst, |
1183 | ETH_P_EAPOL, rbuf, rlen, key_mic); | |
6fc6879b JM |
1184 | } |
1185 | ||
1186 | ||
1187 | static void wpa_supplicant_process_3_of_4(struct wpa_sm *sm, | |
1188 | const struct wpa_eapol_key *key, | |
e6270129 JM |
1189 | u16 ver, const u8 *key_data, |
1190 | size_t key_data_len) | |
6fc6879b | 1191 | { |
e6270129 | 1192 | u16 key_info, keylen; |
6fc6879b JM |
1193 | struct wpa_eapol_ie_parse ie; |
1194 | ||
1195 | wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE); | |
f049052b BG |
1196 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 3 of 4-Way " |
1197 | "Handshake from " MACSTR " (ver=%d)", MAC2STR(sm->bssid), ver); | |
6fc6879b JM |
1198 | |
1199 | key_info = WPA_GET_BE16(key->key_info); | |
1200 | ||
e6270129 JM |
1201 | wpa_hexdump(MSG_DEBUG, "WPA: IE KeyData", key_data, key_data_len); |
1202 | if (wpa_supplicant_parse_ies(key_data, key_data_len, &ie) < 0) | |
d627a939 | 1203 | goto failed; |
6fc6879b | 1204 | if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { |
f049052b BG |
1205 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1206 | "WPA: GTK IE in unencrypted key data"); | |
83935317 | 1207 | goto failed; |
6fc6879b JM |
1208 | } |
1209 | #ifdef CONFIG_IEEE80211W | |
1210 | if (ie.igtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { | |
f049052b BG |
1211 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1212 | "WPA: IGTK KDE in unencrypted key data"); | |
83935317 | 1213 | goto failed; |
6fc6879b JM |
1214 | } |
1215 | ||
8dd9f9cd JM |
1216 | if (ie.igtk && |
1217 | wpa_cipher_valid_mgmt_group(sm->mgmt_group_cipher) && | |
1218 | ie.igtk_len != WPA_IGTK_KDE_PREFIX_LEN + | |
1219 | (unsigned int) wpa_cipher_key_len(sm->mgmt_group_cipher)) { | |
f049052b BG |
1220 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1221 | "WPA: Invalid IGTK KDE length %lu", | |
1222 | (unsigned long) ie.igtk_len); | |
83935317 | 1223 | goto failed; |
6fc6879b JM |
1224 | } |
1225 | #endif /* CONFIG_IEEE80211W */ | |
1226 | ||
1227 | if (wpa_supplicant_validate_ie(sm, sm->bssid, &ie) < 0) | |
83935317 | 1228 | goto failed; |
6fc6879b JM |
1229 | |
1230 | if (os_memcmp(sm->anonce, key->key_nonce, WPA_NONCE_LEN) != 0) { | |
f049052b BG |
1231 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1232 | "WPA: ANonce from message 1 of 4-Way Handshake " | |
1233 | "differs from 3 of 4-Way Handshake - drop packet (src=" | |
1234 | MACSTR ")", MAC2STR(sm->bssid)); | |
83935317 | 1235 | goto failed; |
6fc6879b JM |
1236 | } |
1237 | ||
1238 | keylen = WPA_GET_BE16(key->key_length); | |
c3550295 JM |
1239 | if (keylen != wpa_cipher_key_len(sm->pairwise_cipher)) { |
1240 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, | |
1241 | "WPA: Invalid %s key length %d (src=" MACSTR | |
1242 | ")", wpa_cipher_txt(sm->pairwise_cipher), keylen, | |
1243 | MAC2STR(sm->bssid)); | |
1244 | goto failed; | |
6fc6879b JM |
1245 | } |
1246 | ||
25ef8529 JM |
1247 | #ifdef CONFIG_P2P |
1248 | if (ie.ip_addr_alloc) { | |
1249 | os_memcpy(sm->p2p_ip_addr, ie.ip_addr_alloc, 3 * 4); | |
1250 | wpa_hexdump(MSG_DEBUG, "P2P: IP address info", | |
1251 | sm->p2p_ip_addr, sizeof(sm->p2p_ip_addr)); | |
1252 | } | |
1253 | #endif /* CONFIG_P2P */ | |
1254 | ||
6fc6879b | 1255 | if (wpa_supplicant_send_4_of_4(sm, sm->bssid, key, ver, key_info, |
c93b7e18 | 1256 | &sm->ptk) < 0) { |
83935317 JM |
1257 | goto failed; |
1258 | } | |
6fc6879b JM |
1259 | |
1260 | /* SNonce was successfully used in msg 3/4, so mark it to be renewed | |
1261 | * for the next 4-Way Handshake. If msg 3 is received again, the old | |
1262 | * SNonce will still be used to avoid changing PTK. */ | |
1263 | sm->renew_snonce = 1; | |
1264 | ||
1265 | if (key_info & WPA_KEY_INFO_INSTALL) { | |
83935317 JM |
1266 | if (wpa_supplicant_install_ptk(sm, key)) |
1267 | goto failed; | |
6fc6879b JM |
1268 | } |
1269 | ||
1270 | if (key_info & WPA_KEY_INFO_SECURE) { | |
1271 | wpa_sm_mlme_setprotection( | |
1272 | sm, sm->bssid, MLME_SETPROTECTION_PROTECT_TYPE_RX, | |
1273 | MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); | |
1274 | eapol_sm_notify_portValid(sm->eapol, TRUE); | |
1275 | } | |
1276 | wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); | |
1277 | ||
dff1e285 JM |
1278 | if (sm->group_cipher == WPA_CIPHER_GTK_NOT_USED) { |
1279 | wpa_supplicant_key_neg_complete(sm, sm->bssid, | |
1280 | key_info & WPA_KEY_INFO_SECURE); | |
1281 | } else if (ie.gtk && | |
6fc6879b JM |
1282 | wpa_supplicant_pairwise_gtk(sm, key, |
1283 | ie.gtk, ie.gtk_len, key_info) < 0) { | |
f049052b BG |
1284 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1285 | "RSN: Failed to configure GTK"); | |
83935317 | 1286 | goto failed; |
6fc6879b JM |
1287 | } |
1288 | ||
83935317 | 1289 | if (ieee80211w_set_keys(sm, &ie) < 0) { |
f049052b BG |
1290 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1291 | "RSN: Failed to configure IGTK"); | |
83935317 JM |
1292 | goto failed; |
1293 | } | |
1294 | ||
392e68e8 SD |
1295 | if (ie.gtk) |
1296 | wpa_sm_set_rekey_offload(sm); | |
b14a210c | 1297 | |
087a1f4e JM |
1298 | if (sm->proto == WPA_PROTO_RSN && wpa_key_mgmt_suite_b(sm->key_mgmt)) { |
1299 | struct rsn_pmksa_cache_entry *sa; | |
1300 | ||
1301 | sa = pmksa_cache_add(sm->pmksa, sm->pmk, sm->pmk_len, | |
98cd3d1c | 1302 | sm->ptk.kck, sm->ptk.kck_len, |
087a1f4e JM |
1303 | sm->bssid, sm->own_addr, |
1304 | sm->network_ctx, sm->key_mgmt); | |
1305 | if (!sm->cur_pmksa) | |
1306 | sm->cur_pmksa = sa; | |
1307 | } | |
1308 | ||
761396e4 | 1309 | sm->msg_3_of_4_ok = 1; |
83935317 JM |
1310 | return; |
1311 | ||
1312 | failed: | |
1313 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); | |
6fc6879b JM |
1314 | } |
1315 | ||
1316 | ||
1317 | static int wpa_supplicant_process_1_of_2_rsn(struct wpa_sm *sm, | |
1318 | const u8 *keydata, | |
1319 | size_t keydatalen, | |
1320 | u16 key_info, | |
1321 | struct wpa_gtk_data *gd) | |
1322 | { | |
1323 | int maxkeylen; | |
1324 | struct wpa_eapol_ie_parse ie; | |
1325 | ||
1326 | wpa_hexdump(MSG_DEBUG, "RSN: msg 1/2 key data", keydata, keydatalen); | |
d627a939 JM |
1327 | if (wpa_supplicant_parse_ies(keydata, keydatalen, &ie) < 0) |
1328 | return -1; | |
6fc6879b | 1329 | if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { |
f049052b BG |
1330 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1331 | "WPA: GTK IE in unencrypted key data"); | |
6fc6879b JM |
1332 | return -1; |
1333 | } | |
1334 | if (ie.gtk == NULL) { | |
f049052b BG |
1335 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1336 | "WPA: No GTK IE in Group Key msg 1/2"); | |
6fc6879b JM |
1337 | return -1; |
1338 | } | |
1339 | maxkeylen = gd->gtk_len = ie.gtk_len - 2; | |
1340 | ||
f049052b | 1341 | if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, |
6fc6879b JM |
1342 | gd->gtk_len, maxkeylen, |
1343 | &gd->key_rsc_len, &gd->alg)) | |
1344 | return -1; | |
1345 | ||
7cb9bb4d JM |
1346 | wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in group key handshake", |
1347 | ie.gtk, ie.gtk_len); | |
6fc6879b JM |
1348 | gd->keyidx = ie.gtk[0] & 0x3; |
1349 | gd->tx = wpa_supplicant_gtk_tx_bit_workaround(sm, | |
1350 | !!(ie.gtk[0] & BIT(2))); | |
1351 | if (ie.gtk_len - 2 > sizeof(gd->gtk)) { | |
f049052b BG |
1352 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1353 | "RSN: Too long GTK in GTK IE (len=%lu)", | |
1354 | (unsigned long) ie.gtk_len - 2); | |
6fc6879b JM |
1355 | return -1; |
1356 | } | |
1357 | os_memcpy(gd->gtk, ie.gtk + 2, ie.gtk_len - 2); | |
1358 | ||
1359 | if (ieee80211w_set_keys(sm, &ie) < 0) | |
f049052b BG |
1360 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1361 | "RSN: Failed to configure IGTK"); | |
6fc6879b JM |
1362 | |
1363 | return 0; | |
1364 | } | |
1365 | ||
1366 | ||
1367 | static int wpa_supplicant_process_1_of_2_wpa(struct wpa_sm *sm, | |
1368 | const struct wpa_eapol_key *key, | |
e6270129 JM |
1369 | const u8 *key_data, |
1370 | size_t key_data_len, u16 key_info, | |
1371 | u16 ver, struct wpa_gtk_data *gd) | |
6fc6879b JM |
1372 | { |
1373 | size_t maxkeylen; | |
c397eff8 | 1374 | u16 gtk_len; |
6fc6879b | 1375 | |
c397eff8 | 1376 | gtk_len = WPA_GET_BE16(key->key_length); |
e6270129 | 1377 | maxkeylen = key_data_len; |
6fc6879b JM |
1378 | if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { |
1379 | if (maxkeylen < 8) { | |
f049052b BG |
1380 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1381 | "WPA: Too short maxkeylen (%lu)", | |
1382 | (unsigned long) maxkeylen); | |
6fc6879b JM |
1383 | return -1; |
1384 | } | |
1385 | maxkeylen -= 8; | |
1386 | } | |
1387 | ||
c397eff8 JM |
1388 | if (gtk_len > maxkeylen || |
1389 | wpa_supplicant_check_group_cipher(sm, sm->group_cipher, | |
1390 | gtk_len, maxkeylen, | |
6fc6879b JM |
1391 | &gd->key_rsc_len, &gd->alg)) |
1392 | return -1; | |
1393 | ||
c397eff8 | 1394 | gd->gtk_len = gtk_len; |
6fc6879b JM |
1395 | gd->keyidx = (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> |
1396 | WPA_KEY_INFO_KEY_INDEX_SHIFT; | |
98cd3d1c | 1397 | if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && sm->ptk.kek_len == 16) { |
7cb53ded JM |
1398 | #ifdef CONFIG_NO_RC4 |
1399 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, | |
1400 | "WPA: RC4 not supported in the build"); | |
1401 | return -1; | |
1402 | #else /* CONFIG_NO_RC4 */ | |
d2c33b91 | 1403 | u8 ek[32]; |
e6270129 | 1404 | if (key_data_len > sizeof(gd->gtk)) { |
f049052b BG |
1405 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1406 | "WPA: RC4 key data too long (%lu)", | |
e6270129 | 1407 | (unsigned long) key_data_len); |
6fc6879b JM |
1408 | return -1; |
1409 | } | |
d2c33b91 | 1410 | os_memcpy(ek, key->key_iv, 16); |
98cd3d1c | 1411 | os_memcpy(ek + 16, sm->ptk.kek, sm->ptk.kek_len); |
e6270129 JM |
1412 | os_memcpy(gd->gtk, key_data, key_data_len); |
1413 | if (rc4_skip(ek, 32, 256, gd->gtk, key_data_len)) { | |
d2c33b91 | 1414 | os_memset(ek, 0, sizeof(ek)); |
f049052b BG |
1415 | wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, |
1416 | "WPA: RC4 failed"); | |
7a215dfc JM |
1417 | return -1; |
1418 | } | |
d2c33b91 | 1419 | os_memset(ek, 0, sizeof(ek)); |
7cb53ded | 1420 | #endif /* CONFIG_NO_RC4 */ |
6fc6879b | 1421 | } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { |
e6270129 | 1422 | if (maxkeylen % 8) { |
f049052b BG |
1423 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1424 | "WPA: Unsupported AES-WRAP len %lu", | |
e6270129 | 1425 | (unsigned long) maxkeylen); |
6fc6879b JM |
1426 | return -1; |
1427 | } | |
1428 | if (maxkeylen > sizeof(gd->gtk)) { | |
f049052b BG |
1429 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1430 | "WPA: AES-WRAP key data " | |
1431 | "too long (keydatalen=%lu maxkeylen=%lu)", | |
e6270129 | 1432 | (unsigned long) key_data_len, |
f049052b | 1433 | (unsigned long) maxkeylen); |
6fc6879b JM |
1434 | return -1; |
1435 | } | |
98cd3d1c JM |
1436 | if (aes_unwrap(sm->ptk.kek, sm->ptk.kek_len, maxkeylen / 8, |
1437 | key_data, gd->gtk)) { | |
f049052b BG |
1438 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1439 | "WPA: AES unwrap failed - could not decrypt " | |
1440 | "GTK"); | |
6fc6879b JM |
1441 | return -1; |
1442 | } | |
1443 | } else { | |
f049052b BG |
1444 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1445 | "WPA: Unsupported key_info type %d", ver); | |
6fc6879b JM |
1446 | return -1; |
1447 | } | |
1448 | gd->tx = wpa_supplicant_gtk_tx_bit_workaround( | |
1449 | sm, !!(key_info & WPA_KEY_INFO_TXRX)); | |
1450 | return 0; | |
1451 | } | |
1452 | ||
1453 | ||
1454 | static int wpa_supplicant_send_2_of_2(struct wpa_sm *sm, | |
1455 | const struct wpa_eapol_key *key, | |
1456 | int ver, u16 key_info) | |
1457 | { | |
5e3b5197 | 1458 | size_t mic_len, hdrlen, rlen; |
6fc6879b | 1459 | struct wpa_eapol_key *reply; |
5e3b5197 JM |
1460 | struct wpa_eapol_key_192 *reply192; |
1461 | u8 *rbuf, *key_mic; | |
6fc6879b | 1462 | |
5e3b5197 JM |
1463 | mic_len = wpa_mic_len(sm->key_mgmt); |
1464 | hdrlen = mic_len == 24 ? sizeof(*reply192) : sizeof(*reply); | |
6fc6879b | 1465 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, |
5e3b5197 | 1466 | hdrlen, &rlen, (void *) &reply); |
6fc6879b JM |
1467 | if (rbuf == NULL) |
1468 | return -1; | |
5e3b5197 | 1469 | reply192 = (struct wpa_eapol_key_192 *) reply; |
6fc6879b | 1470 | |
a14896e8 JM |
1471 | reply->type = (sm->proto == WPA_PROTO_RSN || |
1472 | sm->proto == WPA_PROTO_OSEN) ? | |
6fc6879b JM |
1473 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; |
1474 | key_info &= WPA_KEY_INFO_KEY_INDEX_MASK; | |
1475 | key_info |= ver | WPA_KEY_INFO_MIC | WPA_KEY_INFO_SECURE; | |
1476 | WPA_PUT_BE16(reply->key_info, key_info); | |
a14896e8 | 1477 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) |
6fc6879b JM |
1478 | WPA_PUT_BE16(reply->key_length, 0); |
1479 | else | |
1480 | os_memcpy(reply->key_length, key->key_length, 2); | |
1481 | os_memcpy(reply->replay_counter, key->replay_counter, | |
1482 | WPA_REPLAY_COUNTER_LEN); | |
1483 | ||
5e3b5197 JM |
1484 | key_mic = reply192->key_mic; /* same offset for reply and reply192 */ |
1485 | if (mic_len == 24) | |
1486 | WPA_PUT_BE16(reply192->key_data_length, 0); | |
1487 | else | |
1488 | WPA_PUT_BE16(reply->key_data_length, 0); | |
6fc6879b | 1489 | |
f049052b | 1490 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/2"); |
c93b7e18 AA |
1491 | return wpa_eapol_key_send(sm, sm->ptk.kck, sm->ptk.kck_len, ver, |
1492 | sm->bssid, ETH_P_EAPOL, rbuf, rlen, key_mic); | |
6fc6879b JM |
1493 | } |
1494 | ||
1495 | ||
1496 | static void wpa_supplicant_process_1_of_2(struct wpa_sm *sm, | |
1497 | const unsigned char *src_addr, | |
1498 | const struct wpa_eapol_key *key, | |
e6270129 JM |
1499 | const u8 *key_data, |
1500 | size_t key_data_len, u16 ver) | |
6fc6879b | 1501 | { |
e6270129 | 1502 | u16 key_info; |
6fc6879b JM |
1503 | int rekey, ret; |
1504 | struct wpa_gtk_data gd; | |
73ed03f3 | 1505 | const u8 *key_rsc; |
6fc6879b | 1506 | |
761396e4 JM |
1507 | if (!sm->msg_3_of_4_ok) { |
1508 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, | |
1509 | "WPA: Group Key Handshake started prior to completion of 4-way handshake"); | |
1510 | goto failed; | |
1511 | } | |
1512 | ||
6fc6879b JM |
1513 | os_memset(&gd, 0, sizeof(gd)); |
1514 | ||
1515 | rekey = wpa_sm_get_state(sm) == WPA_COMPLETED; | |
f049052b BG |
1516 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of Group Key " |
1517 | "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver); | |
6fc6879b JM |
1518 | |
1519 | key_info = WPA_GET_BE16(key->key_info); | |
6fc6879b | 1520 | |
a14896e8 | 1521 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { |
e6270129 JM |
1522 | ret = wpa_supplicant_process_1_of_2_rsn(sm, key_data, |
1523 | key_data_len, key_info, | |
6fc6879b JM |
1524 | &gd); |
1525 | } else { | |
e6270129 JM |
1526 | ret = wpa_supplicant_process_1_of_2_wpa(sm, key, key_data, |
1527 | key_data_len, | |
1528 | key_info, ver, &gd); | |
6fc6879b JM |
1529 | } |
1530 | ||
1531 | wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); | |
1532 | ||
1533 | if (ret) | |
83935317 | 1534 | goto failed; |
6fc6879b | 1535 | |
73ed03f3 MS |
1536 | key_rsc = key->key_rsc; |
1537 | if (wpa_supplicant_rsc_relaxation(sm, key->key_rsc)) | |
1538 | key_rsc = null_rsc; | |
1539 | ||
1540 | if (wpa_supplicant_install_gtk(sm, &gd, key_rsc) || | |
c93b7e18 | 1541 | wpa_supplicant_send_2_of_2(sm, key, ver, key_info) < 0) |
83935317 | 1542 | goto failed; |
fbfc974c | 1543 | os_memset(&gd, 0, sizeof(gd)); |
6fc6879b JM |
1544 | |
1545 | if (rekey) { | |
0f057fb2 | 1546 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Group rekeying " |
6fc6879b JM |
1547 | "completed with " MACSTR " [GTK=%s]", |
1548 | MAC2STR(sm->bssid), wpa_cipher_txt(sm->group_cipher)); | |
1549 | wpa_sm_cancel_auth_timeout(sm); | |
1550 | wpa_sm_set_state(sm, WPA_COMPLETED); | |
1551 | } else { | |
1552 | wpa_supplicant_key_neg_complete(sm, sm->bssid, | |
1553 | key_info & | |
1554 | WPA_KEY_INFO_SECURE); | |
1555 | } | |
392e68e8 SD |
1556 | |
1557 | wpa_sm_set_rekey_offload(sm); | |
1558 | ||
83935317 JM |
1559 | return; |
1560 | ||
1561 | failed: | |
fbfc974c | 1562 | os_memset(&gd, 0, sizeof(gd)); |
83935317 | 1563 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); |
6fc6879b JM |
1564 | } |
1565 | ||
1566 | ||
1567 | static int wpa_supplicant_verify_eapol_key_mic(struct wpa_sm *sm, | |
5e3b5197 | 1568 | struct wpa_eapol_key_192 *key, |
6fc6879b JM |
1569 | u16 ver, |
1570 | const u8 *buf, size_t len) | |
1571 | { | |
98cd3d1c | 1572 | u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN]; |
6fc6879b | 1573 | int ok = 0; |
5e3b5197 | 1574 | size_t mic_len = wpa_mic_len(sm->key_mgmt); |
6fc6879b | 1575 | |
98cd3d1c | 1576 | os_memcpy(mic, key->key_mic, mic_len); |
6fc6879b | 1577 | if (sm->tptk_set) { |
98cd3d1c JM |
1578 | os_memset(key->key_mic, 0, mic_len); |
1579 | wpa_eapol_key_mic(sm->tptk.kck, sm->tptk.kck_len, sm->key_mgmt, | |
1580 | ver, buf, len, key->key_mic); | |
1581 | if (os_memcmp_const(mic, key->key_mic, mic_len) != 0) { | |
f049052b BG |
1582 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1583 | "WPA: Invalid EAPOL-Key MIC " | |
1584 | "when using TPTK - ignoring TPTK"); | |
6fc6879b JM |
1585 | } else { |
1586 | ok = 1; | |
1587 | sm->tptk_set = 0; | |
1588 | sm->ptk_set = 1; | |
1589 | os_memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk)); | |
d2c33b91 | 1590 | os_memset(&sm->tptk, 0, sizeof(sm->tptk)); |
6fc6879b JM |
1591 | } |
1592 | } | |
1593 | ||
1594 | if (!ok && sm->ptk_set) { | |
98cd3d1c JM |
1595 | os_memset(key->key_mic, 0, mic_len); |
1596 | wpa_eapol_key_mic(sm->ptk.kck, sm->ptk.kck_len, sm->key_mgmt, | |
1597 | ver, buf, len, key->key_mic); | |
1598 | if (os_memcmp_const(mic, key->key_mic, mic_len) != 0) { | |
f049052b BG |
1599 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1600 | "WPA: Invalid EAPOL-Key MIC - " | |
1601 | "dropping packet"); | |
6fc6879b JM |
1602 | return -1; |
1603 | } | |
1604 | ok = 1; | |
1605 | } | |
1606 | ||
1607 | if (!ok) { | |
f049052b BG |
1608 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1609 | "WPA: Could not verify EAPOL-Key MIC - " | |
1610 | "dropping packet"); | |
6fc6879b JM |
1611 | return -1; |
1612 | } | |
1613 | ||
1614 | os_memcpy(sm->rx_replay_counter, key->replay_counter, | |
1615 | WPA_REPLAY_COUNTER_LEN); | |
1616 | sm->rx_replay_counter_set = 1; | |
1617 | return 0; | |
1618 | } | |
1619 | ||
1620 | ||
1621 | /* Decrypt RSN EAPOL-Key key data (RC4 or AES-WRAP) */ | |
1622 | static int wpa_supplicant_decrypt_key_data(struct wpa_sm *sm, | |
e6270129 JM |
1623 | struct wpa_eapol_key *key, u16 ver, |
1624 | u8 *key_data, size_t *key_data_len) | |
6fc6879b | 1625 | { |
6fc6879b | 1626 | wpa_hexdump(MSG_DEBUG, "RSN: encrypted key data", |
e6270129 | 1627 | key_data, *key_data_len); |
6fc6879b | 1628 | if (!sm->ptk_set) { |
f049052b BG |
1629 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1630 | "WPA: PTK not available, cannot decrypt EAPOL-Key Key " | |
1631 | "Data"); | |
6fc6879b JM |
1632 | return -1; |
1633 | } | |
1634 | ||
1635 | /* Decrypt key data here so that this operation does not need | |
1636 | * to be implemented separately for each message type. */ | |
98cd3d1c | 1637 | if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && sm->ptk.kek_len == 16) { |
7cb53ded JM |
1638 | #ifdef CONFIG_NO_RC4 |
1639 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, | |
1640 | "WPA: RC4 not supported in the build"); | |
1641 | return -1; | |
1642 | #else /* CONFIG_NO_RC4 */ | |
6fc6879b JM |
1643 | u8 ek[32]; |
1644 | os_memcpy(ek, key->key_iv, 16); | |
98cd3d1c | 1645 | os_memcpy(ek + 16, sm->ptk.kek, sm->ptk.kek_len); |
e6270129 | 1646 | if (rc4_skip(ek, 32, 256, key_data, *key_data_len)) { |
d2c33b91 | 1647 | os_memset(ek, 0, sizeof(ek)); |
f049052b BG |
1648 | wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, |
1649 | "WPA: RC4 failed"); | |
7a215dfc JM |
1650 | return -1; |
1651 | } | |
d2c33b91 | 1652 | os_memset(ek, 0, sizeof(ek)); |
7cb53ded | 1653 | #endif /* CONFIG_NO_RC4 */ |
6fc6879b | 1654 | } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || |
df0f01d9 | 1655 | ver == WPA_KEY_INFO_TYPE_AES_128_CMAC || |
929a2ea5 JM |
1656 | sm->key_mgmt == WPA_KEY_MGMT_OSEN || |
1657 | wpa_key_mgmt_suite_b(sm->key_mgmt)) { | |
6fc6879b | 1658 | u8 *buf; |
e6270129 | 1659 | if (*key_data_len < 8 || *key_data_len % 8) { |
f049052b | 1660 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
e6270129 JM |
1661 | "WPA: Unsupported AES-WRAP len %u", |
1662 | (unsigned int) *key_data_len); | |
6fc6879b JM |
1663 | return -1; |
1664 | } | |
e6270129 JM |
1665 | *key_data_len -= 8; /* AES-WRAP adds 8 bytes */ |
1666 | buf = os_malloc(*key_data_len); | |
6fc6879b | 1667 | if (buf == NULL) { |
f049052b BG |
1668 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1669 | "WPA: No memory for AES-UNWRAP buffer"); | |
6fc6879b JM |
1670 | return -1; |
1671 | } | |
98cd3d1c | 1672 | if (aes_unwrap(sm->ptk.kek, sm->ptk.kek_len, *key_data_len / 8, |
e6270129 | 1673 | key_data, buf)) { |
6fc6879b | 1674 | os_free(buf); |
f049052b BG |
1675 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1676 | "WPA: AES unwrap failed - " | |
1677 | "could not decrypt EAPOL-Key key data"); | |
6fc6879b JM |
1678 | return -1; |
1679 | } | |
e6270129 | 1680 | os_memcpy(key_data, buf, *key_data_len); |
6fc6879b | 1681 | os_free(buf); |
e6270129 | 1682 | WPA_PUT_BE16(key->key_data_length, *key_data_len); |
6fc6879b | 1683 | } else { |
f049052b BG |
1684 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1685 | "WPA: Unsupported key_info type %d", ver); | |
6fc6879b JM |
1686 | return -1; |
1687 | } | |
1688 | wpa_hexdump_key(MSG_DEBUG, "WPA: decrypted EAPOL-Key key data", | |
e6270129 | 1689 | key_data, *key_data_len); |
6fc6879b JM |
1690 | return 0; |
1691 | } | |
1692 | ||
1693 | ||
1694 | /** | |
1695 | * wpa_sm_aborted_cached - Notify WPA that PMKSA caching was aborted | |
1696 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
1697 | */ | |
1698 | void wpa_sm_aborted_cached(struct wpa_sm *sm) | |
1699 | { | |
1700 | if (sm && sm->cur_pmksa) { | |
f049052b BG |
1701 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1702 | "RSN: Cancelling PMKSA caching attempt"); | |
6fc6879b JM |
1703 | sm->cur_pmksa = NULL; |
1704 | } | |
1705 | } | |
1706 | ||
1707 | ||
f049052b | 1708 | static void wpa_eapol_key_dump(struct wpa_sm *sm, |
5e3b5197 JM |
1709 | const struct wpa_eapol_key *key, |
1710 | unsigned int key_data_len, | |
1711 | const u8 *mic, unsigned int mic_len) | |
6fc6879b JM |
1712 | { |
1713 | #ifndef CONFIG_NO_STDOUT_DEBUG | |
1714 | u16 key_info = WPA_GET_BE16(key->key_info); | |
1715 | ||
f049052b BG |
1716 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, " EAPOL-Key type=%d", key->type); |
1717 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
1718 | " key_info 0x%x (ver=%d keyidx=%d rsvd=%d %s%s%s%s%s%s%s%s)", | |
1719 | key_info, key_info & WPA_KEY_INFO_TYPE_MASK, | |
1720 | (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> | |
1721 | WPA_KEY_INFO_KEY_INDEX_SHIFT, | |
1722 | (key_info & (BIT(13) | BIT(14) | BIT(15))) >> 13, | |
1723 | key_info & WPA_KEY_INFO_KEY_TYPE ? "Pairwise" : "Group", | |
1724 | key_info & WPA_KEY_INFO_INSTALL ? " Install" : "", | |
1725 | key_info & WPA_KEY_INFO_ACK ? " Ack" : "", | |
1726 | key_info & WPA_KEY_INFO_MIC ? " MIC" : "", | |
1727 | key_info & WPA_KEY_INFO_SECURE ? " Secure" : "", | |
1728 | key_info & WPA_KEY_INFO_ERROR ? " Error" : "", | |
1729 | key_info & WPA_KEY_INFO_REQUEST ? " Request" : "", | |
1730 | key_info & WPA_KEY_INFO_ENCR_KEY_DATA ? " Encr" : ""); | |
1731 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
1732 | " key_length=%u key_data_length=%u", | |
5e3b5197 | 1733 | WPA_GET_BE16(key->key_length), key_data_len); |
6fc6879b JM |
1734 | wpa_hexdump(MSG_DEBUG, " replay_counter", |
1735 | key->replay_counter, WPA_REPLAY_COUNTER_LEN); | |
1736 | wpa_hexdump(MSG_DEBUG, " key_nonce", key->key_nonce, WPA_NONCE_LEN); | |
1737 | wpa_hexdump(MSG_DEBUG, " key_iv", key->key_iv, 16); | |
1738 | wpa_hexdump(MSG_DEBUG, " key_rsc", key->key_rsc, 8); | |
1739 | wpa_hexdump(MSG_DEBUG, " key_id (reserved)", key->key_id, 8); | |
5e3b5197 | 1740 | wpa_hexdump(MSG_DEBUG, " key_mic", mic, mic_len); |
6fc6879b JM |
1741 | #endif /* CONFIG_NO_STDOUT_DEBUG */ |
1742 | } | |
1743 | ||
1744 | ||
1745 | /** | |
1746 | * wpa_sm_rx_eapol - Process received WPA EAPOL frames | |
1747 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
1748 | * @src_addr: Source MAC address of the EAPOL packet | |
1749 | * @buf: Pointer to the beginning of the EAPOL data (EAPOL header) | |
1750 | * @len: Length of the EAPOL frame | |
1751 | * Returns: 1 = WPA EAPOL-Key processed, 0 = not a WPA EAPOL-Key, -1 failure | |
1752 | * | |
1753 | * This function is called for each received EAPOL frame. Other than EAPOL-Key | |
1754 | * frames can be skipped if filtering is done elsewhere. wpa_sm_rx_eapol() is | |
1755 | * only processing WPA and WPA2 EAPOL-Key frames. | |
1756 | * | |
1757 | * The received EAPOL-Key packets are validated and valid packets are replied | |
1758 | * to. In addition, key material (PTK, GTK) is configured at the end of a | |
1759 | * successful key handshake. | |
1760 | */ | |
1761 | int wpa_sm_rx_eapol(struct wpa_sm *sm, const u8 *src_addr, | |
1762 | const u8 *buf, size_t len) | |
1763 | { | |
e6270129 | 1764 | size_t plen, data_len, key_data_len; |
d56d7e56 | 1765 | const struct ieee802_1x_hdr *hdr; |
6fc6879b | 1766 | struct wpa_eapol_key *key; |
5e3b5197 | 1767 | struct wpa_eapol_key_192 *key192; |
6fc6879b | 1768 | u16 key_info, ver; |
d56d7e56 | 1769 | u8 *tmp = NULL; |
6fc6879b JM |
1770 | int ret = -1; |
1771 | struct wpa_peerkey *peerkey = NULL; | |
e6270129 | 1772 | u8 *key_data; |
5e3b5197 | 1773 | size_t mic_len, keyhdrlen; |
6fc6879b JM |
1774 | |
1775 | #ifdef CONFIG_IEEE80211R | |
1776 | sm->ft_completed = 0; | |
1777 | #endif /* CONFIG_IEEE80211R */ | |
1778 | ||
5e3b5197 JM |
1779 | mic_len = wpa_mic_len(sm->key_mgmt); |
1780 | keyhdrlen = mic_len == 24 ? sizeof(*key192) : sizeof(*key); | |
1781 | ||
1782 | if (len < sizeof(*hdr) + keyhdrlen) { | |
f049052b BG |
1783 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1784 | "WPA: EAPOL frame too short to be a WPA " | |
1785 | "EAPOL-Key (len %lu, expecting at least %lu)", | |
1786 | (unsigned long) len, | |
5e3b5197 | 1787 | (unsigned long) sizeof(*hdr) + keyhdrlen); |
6fc6879b JM |
1788 | return 0; |
1789 | } | |
1790 | ||
d56d7e56 | 1791 | hdr = (const struct ieee802_1x_hdr *) buf; |
6fc6879b JM |
1792 | plen = be_to_host16(hdr->length); |
1793 | data_len = plen + sizeof(*hdr); | |
f049052b BG |
1794 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1795 | "IEEE 802.1X RX: version=%d type=%d length=%lu", | |
1796 | hdr->version, hdr->type, (unsigned long) plen); | |
6fc6879b JM |
1797 | |
1798 | if (hdr->version < EAPOL_VERSION) { | |
1799 | /* TODO: backwards compatibility */ | |
1800 | } | |
1801 | if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) { | |
f049052b BG |
1802 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1803 | "WPA: EAPOL frame (type %u) discarded, " | |
6fc6879b JM |
1804 | "not a Key frame", hdr->type); |
1805 | ret = 0; | |
1806 | goto out; | |
1807 | } | |
d56d7e56 | 1808 | wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL-Key", buf, len); |
5e3b5197 | 1809 | if (plen > len - sizeof(*hdr) || plen < keyhdrlen) { |
f049052b BG |
1810 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1811 | "WPA: EAPOL frame payload size %lu " | |
1812 | "invalid (frame size %lu)", | |
1813 | (unsigned long) plen, (unsigned long) len); | |
6fc6879b JM |
1814 | ret = 0; |
1815 | goto out; | |
1816 | } | |
d56d7e56 JM |
1817 | if (data_len < len) { |
1818 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
1819 | "WPA: ignoring %lu bytes after the IEEE 802.1X data", | |
1820 | (unsigned long) len - data_len); | |
1821 | } | |
1822 | ||
1823 | /* | |
1824 | * Make a copy of the frame since we need to modify the buffer during | |
1825 | * MAC validation and Key Data decryption. | |
1826 | */ | |
1827 | tmp = os_malloc(data_len); | |
1828 | if (tmp == NULL) | |
1829 | goto out; | |
1830 | os_memcpy(tmp, buf, data_len); | |
1831 | key = (struct wpa_eapol_key *) (tmp + sizeof(struct ieee802_1x_hdr)); | |
5e3b5197 JM |
1832 | key192 = (struct wpa_eapol_key_192 *) |
1833 | (tmp + sizeof(struct ieee802_1x_hdr)); | |
1834 | if (mic_len == 24) | |
1835 | key_data = (u8 *) (key192 + 1); | |
1836 | else | |
1837 | key_data = (u8 *) (key + 1); | |
6fc6879b JM |
1838 | |
1839 | if (key->type != EAPOL_KEY_TYPE_WPA && key->type != EAPOL_KEY_TYPE_RSN) | |
1840 | { | |
f049052b BG |
1841 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1842 | "WPA: EAPOL-Key type (%d) unknown, discarded", | |
1843 | key->type); | |
6fc6879b JM |
1844 | ret = 0; |
1845 | goto out; | |
1846 | } | |
6fc6879b | 1847 | |
5e3b5197 JM |
1848 | if (mic_len == 24) |
1849 | key_data_len = WPA_GET_BE16(key192->key_data_length); | |
1850 | else | |
1851 | key_data_len = WPA_GET_BE16(key->key_data_length); | |
1852 | wpa_eapol_key_dump(sm, key, key_data_len, key192->key_mic, mic_len); | |
1853 | ||
1854 | if (key_data_len > plen - keyhdrlen) { | |
d56d7e56 JM |
1855 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Invalid EAPOL-Key " |
1856 | "frame - key_data overflow (%u > %u)", | |
e6270129 | 1857 | (unsigned int) key_data_len, |
5e3b5197 | 1858 | (unsigned int) (plen - keyhdrlen)); |
d56d7e56 | 1859 | goto out; |
6fc6879b | 1860 | } |
d56d7e56 JM |
1861 | |
1862 | eapol_sm_notify_lower_layer_success(sm->eapol, 0); | |
6fc6879b JM |
1863 | key_info = WPA_GET_BE16(key->key_info); |
1864 | ver = key_info & WPA_KEY_INFO_TYPE_MASK; | |
1865 | if (ver != WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && | |
a20088e5 | 1866 | #if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W) |
6fc6879b | 1867 | ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && |
a20088e5 | 1868 | #endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */ |
df0f01d9 | 1869 | ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES && |
929a2ea5 | 1870 | !wpa_key_mgmt_suite_b(sm->key_mgmt) && |
df0f01d9 | 1871 | sm->key_mgmt != WPA_KEY_MGMT_OSEN) { |
f049052b BG |
1872 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1873 | "WPA: Unsupported EAPOL-Key descriptor version %d", | |
1874 | ver); | |
6fc6879b JM |
1875 | goto out; |
1876 | } | |
1877 | ||
df0f01d9 JM |
1878 | if (sm->key_mgmt == WPA_KEY_MGMT_OSEN && |
1879 | ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) { | |
1880 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, | |
1881 | "OSEN: Unsupported EAPOL-Key descriptor version %d", | |
1882 | ver); | |
1883 | goto out; | |
1884 | } | |
1885 | ||
929a2ea5 JM |
1886 | if (wpa_key_mgmt_suite_b(sm->key_mgmt) && |
1887 | ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) { | |
1888 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, | |
1889 | "RSN: Unsupported EAPOL-Key descriptor version %d (expected AKM defined = 0)", | |
1890 | ver); | |
1891 | goto out; | |
1892 | } | |
1893 | ||
6fc6879b | 1894 | #ifdef CONFIG_IEEE80211R |
56586197 | 1895 | if (wpa_key_mgmt_ft(sm->key_mgmt)) { |
6fc6879b JM |
1896 | /* IEEE 802.11r uses a new key_info type (AES-128-CMAC). */ |
1897 | if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) { | |
f049052b BG |
1898 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1899 | "FT: AP did not use AES-128-CMAC"); | |
6fc6879b JM |
1900 | goto out; |
1901 | } | |
1902 | } else | |
1903 | #endif /* CONFIG_IEEE80211R */ | |
56586197 JM |
1904 | #ifdef CONFIG_IEEE80211W |
1905 | if (wpa_key_mgmt_sha256(sm->key_mgmt)) { | |
df0f01d9 | 1906 | if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && |
929a2ea5 JM |
1907 | sm->key_mgmt != WPA_KEY_MGMT_OSEN && |
1908 | !wpa_key_mgmt_suite_b(sm->key_mgmt)) { | |
f049052b BG |
1909 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1910 | "WPA: AP did not use the " | |
1911 | "negotiated AES-128-CMAC"); | |
56586197 JM |
1912 | goto out; |
1913 | } | |
1914 | } else | |
1915 | #endif /* CONFIG_IEEE80211W */ | |
6fc6879b | 1916 | if (sm->pairwise_cipher == WPA_CIPHER_CCMP && |
929a2ea5 | 1917 | !wpa_key_mgmt_suite_b(sm->key_mgmt) && |
6fc6879b | 1918 | ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { |
f049052b BG |
1919 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1920 | "WPA: CCMP is used, but EAPOL-Key " | |
1921 | "descriptor version (%d) is not 2", ver); | |
6fc6879b JM |
1922 | if (sm->group_cipher != WPA_CIPHER_CCMP && |
1923 | !(key_info & WPA_KEY_INFO_KEY_TYPE)) { | |
1924 | /* Earlier versions of IEEE 802.11i did not explicitly | |
1925 | * require version 2 descriptor for all EAPOL-Key | |
1926 | * packets, so allow group keys to use version 1 if | |
1927 | * CCMP is not used for them. */ | |
f049052b BG |
1928 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1929 | "WPA: Backwards compatibility: allow invalid " | |
1930 | "version for non-CCMP group keys"); | |
9f6a7cdd JM |
1931 | } else if (ver == WPA_KEY_INFO_TYPE_AES_128_CMAC) { |
1932 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, | |
1933 | "WPA: Interoperability workaround: allow incorrect (should have been HMAC-SHA1), but stronger (is AES-128-CMAC), descriptor version to be used"); | |
6fc6879b JM |
1934 | } else |
1935 | goto out; | |
801e1173 | 1936 | } else if (sm->pairwise_cipher == WPA_CIPHER_GCMP && |
929a2ea5 | 1937 | !wpa_key_mgmt_suite_b(sm->key_mgmt) && |
801e1173 | 1938 | ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { |
eb7719ff JM |
1939 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1940 | "WPA: GCMP is used, but EAPOL-Key " | |
1941 | "descriptor version (%d) is not 2", ver); | |
1942 | goto out; | |
1943 | } | |
6fc6879b JM |
1944 | |
1945 | #ifdef CONFIG_PEERKEY | |
1946 | for (peerkey = sm->peerkey; peerkey; peerkey = peerkey->next) { | |
1947 | if (os_memcmp(peerkey->addr, src_addr, ETH_ALEN) == 0) | |
1948 | break; | |
1949 | } | |
1950 | ||
1951 | if (!(key_info & WPA_KEY_INFO_SMK_MESSAGE) && peerkey) { | |
1952 | if (!peerkey->initiator && peerkey->replay_counter_set && | |
1953 | os_memcmp(key->replay_counter, peerkey->replay_counter, | |
1954 | WPA_REPLAY_COUNTER_LEN) <= 0) { | |
f049052b BG |
1955 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1956 | "RSN: EAPOL-Key Replay Counter did not " | |
1957 | "increase (STK) - dropping packet"); | |
6fc6879b JM |
1958 | goto out; |
1959 | } else if (peerkey->initiator) { | |
1960 | u8 _tmp[WPA_REPLAY_COUNTER_LEN]; | |
1961 | os_memcpy(_tmp, key->replay_counter, | |
1962 | WPA_REPLAY_COUNTER_LEN); | |
1963 | inc_byte_array(_tmp, WPA_REPLAY_COUNTER_LEN); | |
1964 | if (os_memcmp(_tmp, peerkey->replay_counter, | |
1965 | WPA_REPLAY_COUNTER_LEN) != 0) { | |
f049052b BG |
1966 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1967 | "RSN: EAPOL-Key Replay " | |
1968 | "Counter did not match (STK) - " | |
1969 | "dropping packet"); | |
6fc6879b JM |
1970 | goto out; |
1971 | } | |
1972 | } | |
1973 | } | |
1974 | ||
1975 | if (peerkey && peerkey->initiator && (key_info & WPA_KEY_INFO_ACK)) { | |
f049052b BG |
1976 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1977 | "RSN: Ack bit in key_info from STK peer"); | |
6fc6879b JM |
1978 | goto out; |
1979 | } | |
1980 | #endif /* CONFIG_PEERKEY */ | |
1981 | ||
1982 | if (!peerkey && sm->rx_replay_counter_set && | |
1983 | os_memcmp(key->replay_counter, sm->rx_replay_counter, | |
1984 | WPA_REPLAY_COUNTER_LEN) <= 0) { | |
f049052b BG |
1985 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1986 | "WPA: EAPOL-Key Replay Counter did not increase - " | |
1987 | "dropping packet"); | |
6fc6879b JM |
1988 | goto out; |
1989 | } | |
1990 | ||
1991 | if (!(key_info & (WPA_KEY_INFO_ACK | WPA_KEY_INFO_SMK_MESSAGE)) | |
1992 | #ifdef CONFIG_PEERKEY | |
1993 | && (peerkey == NULL || !peerkey->initiator) | |
1994 | #endif /* CONFIG_PEERKEY */ | |
1995 | ) { | |
f049052b BG |
1996 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1997 | "WPA: No Ack bit in key_info"); | |
6fc6879b JM |
1998 | goto out; |
1999 | } | |
2000 | ||
2001 | if (key_info & WPA_KEY_INFO_REQUEST) { | |
f049052b BG |
2002 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
2003 | "WPA: EAPOL-Key with Request bit - dropped"); | |
6fc6879b JM |
2004 | goto out; |
2005 | } | |
2006 | ||
2007 | if ((key_info & WPA_KEY_INFO_MIC) && !peerkey && | |
5e3b5197 | 2008 | wpa_supplicant_verify_eapol_key_mic(sm, key192, ver, tmp, data_len)) |
6fc6879b JM |
2009 | goto out; |
2010 | ||
2011 | #ifdef CONFIG_PEERKEY | |
2012 | if ((key_info & WPA_KEY_INFO_MIC) && peerkey && | |
5e3b5197 JM |
2013 | peerkey_verify_eapol_key_mic(sm, peerkey, key192, ver, tmp, |
2014 | data_len)) | |
6fc6879b JM |
2015 | goto out; |
2016 | #endif /* CONFIG_PEERKEY */ | |
2017 | ||
a14896e8 | 2018 | if ((sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) && |
6fc6879b | 2019 | (key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { |
e6270129 JM |
2020 | if (wpa_supplicant_decrypt_key_data(sm, key, ver, key_data, |
2021 | &key_data_len)) | |
d56d7e56 | 2022 | goto out; |
6fc6879b JM |
2023 | } |
2024 | ||
2025 | if (key_info & WPA_KEY_INFO_KEY_TYPE) { | |
2026 | if (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) { | |
f049052b BG |
2027 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
2028 | "WPA: Ignored EAPOL-Key (Pairwise) with " | |
2029 | "non-zero key index"); | |
6fc6879b JM |
2030 | goto out; |
2031 | } | |
2032 | if (peerkey) { | |
2033 | /* PeerKey 4-Way Handshake */ | |
f107d00c JM |
2034 | peerkey_rx_eapol_4way(sm, peerkey, key, key_info, ver, |
2035 | key_data, key_data_len); | |
6fc6879b JM |
2036 | } else if (key_info & WPA_KEY_INFO_MIC) { |
2037 | /* 3/4 4-Way Handshake */ | |
e6270129 JM |
2038 | wpa_supplicant_process_3_of_4(sm, key, ver, key_data, |
2039 | key_data_len); | |
6fc6879b JM |
2040 | } else { |
2041 | /* 1/4 4-Way Handshake */ | |
2042 | wpa_supplicant_process_1_of_4(sm, src_addr, key, | |
e6270129 JM |
2043 | ver, key_data, |
2044 | key_data_len); | |
6fc6879b JM |
2045 | } |
2046 | } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) { | |
2047 | /* PeerKey SMK Handshake */ | |
e6270129 | 2048 | peerkey_rx_eapol_smk(sm, src_addr, key, key_data_len, key_info, |
6fc6879b JM |
2049 | ver); |
2050 | } else { | |
2051 | if (key_info & WPA_KEY_INFO_MIC) { | |
2052 | /* 1/2 Group Key Handshake */ | |
2053 | wpa_supplicant_process_1_of_2(sm, src_addr, key, | |
e6270129 JM |
2054 | key_data, key_data_len, |
2055 | ver); | |
6fc6879b | 2056 | } else { |
f049052b BG |
2057 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
2058 | "WPA: EAPOL-Key (Group) without Mic bit - " | |
2059 | "dropped"); | |
6fc6879b JM |
2060 | } |
2061 | } | |
2062 | ||
2063 | ret = 1; | |
2064 | ||
2065 | out: | |
fbfc974c | 2066 | bin_clear_free(tmp, data_len); |
6fc6879b JM |
2067 | return ret; |
2068 | } | |
2069 | ||
2070 | ||
2071 | #ifdef CONFIG_CTRL_IFACE | |
6fc6879b JM |
2072 | static u32 wpa_key_mgmt_suite(struct wpa_sm *sm) |
2073 | { | |
2074 | switch (sm->key_mgmt) { | |
2075 | case WPA_KEY_MGMT_IEEE8021X: | |
a14896e8 JM |
2076 | return ((sm->proto == WPA_PROTO_RSN || |
2077 | sm->proto == WPA_PROTO_OSEN) ? | |
6fc6879b JM |
2078 | RSN_AUTH_KEY_MGMT_UNSPEC_802_1X : |
2079 | WPA_AUTH_KEY_MGMT_UNSPEC_802_1X); | |
2080 | case WPA_KEY_MGMT_PSK: | |
2081 | return (sm->proto == WPA_PROTO_RSN ? | |
2082 | RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X : | |
2083 | WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X); | |
2084 | #ifdef CONFIG_IEEE80211R | |
2085 | case WPA_KEY_MGMT_FT_IEEE8021X: | |
2086 | return RSN_AUTH_KEY_MGMT_FT_802_1X; | |
2087 | case WPA_KEY_MGMT_FT_PSK: | |
2088 | return RSN_AUTH_KEY_MGMT_FT_PSK; | |
2089 | #endif /* CONFIG_IEEE80211R */ | |
56586197 JM |
2090 | #ifdef CONFIG_IEEE80211W |
2091 | case WPA_KEY_MGMT_IEEE8021X_SHA256: | |
2092 | return RSN_AUTH_KEY_MGMT_802_1X_SHA256; | |
2093 | case WPA_KEY_MGMT_PSK_SHA256: | |
2094 | return RSN_AUTH_KEY_MGMT_PSK_SHA256; | |
2095 | #endif /* CONFIG_IEEE80211W */ | |
369c8d7b JM |
2096 | case WPA_KEY_MGMT_CCKM: |
2097 | return (sm->proto == WPA_PROTO_RSN ? | |
2098 | RSN_AUTH_KEY_MGMT_CCKM: | |
2099 | WPA_AUTH_KEY_MGMT_CCKM); | |
6fc6879b JM |
2100 | case WPA_KEY_MGMT_WPA_NONE: |
2101 | return WPA_AUTH_KEY_MGMT_NONE; | |
666497c8 JM |
2102 | case WPA_KEY_MGMT_IEEE8021X_SUITE_B: |
2103 | return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B; | |
5e3b5197 JM |
2104 | case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192: |
2105 | return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192; | |
6fc6879b JM |
2106 | default: |
2107 | return 0; | |
2108 | } | |
2109 | } | |
2110 | ||
2111 | ||
6fc6879b JM |
2112 | #define RSN_SUITE "%02x-%02x-%02x-%d" |
2113 | #define RSN_SUITE_ARG(s) \ | |
2114 | ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff | |
2115 | ||
2116 | /** | |
2117 | * wpa_sm_get_mib - Dump text list of MIB entries | |
2118 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2119 | * @buf: Buffer for the list | |
2120 | * @buflen: Length of the buffer | |
2121 | * Returns: Number of bytes written to buffer | |
2122 | * | |
2123 | * This function is used fetch dot11 MIB variables. | |
2124 | */ | |
2125 | int wpa_sm_get_mib(struct wpa_sm *sm, char *buf, size_t buflen) | |
2126 | { | |
2127 | char pmkid_txt[PMKID_LEN * 2 + 1]; | |
2128 | int rsna, ret; | |
2129 | size_t len; | |
2130 | ||
2131 | if (sm->cur_pmksa) { | |
2132 | wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt), | |
2133 | sm->cur_pmksa->pmkid, PMKID_LEN); | |
2134 | } else | |
2135 | pmkid_txt[0] = '\0'; | |
2136 | ||
56586197 JM |
2137 | if ((wpa_key_mgmt_wpa_psk(sm->key_mgmt) || |
2138 | wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt)) && | |
6fc6879b JM |
2139 | sm->proto == WPA_PROTO_RSN) |
2140 | rsna = 1; | |
2141 | else | |
2142 | rsna = 0; | |
2143 | ||
2144 | ret = os_snprintf(buf, buflen, | |
2145 | "dot11RSNAOptionImplemented=TRUE\n" | |
2146 | "dot11RSNAPreauthenticationImplemented=TRUE\n" | |
2147 | "dot11RSNAEnabled=%s\n" | |
2148 | "dot11RSNAPreauthenticationEnabled=%s\n" | |
2149 | "dot11RSNAConfigVersion=%d\n" | |
2150 | "dot11RSNAConfigPairwiseKeysSupported=5\n" | |
2151 | "dot11RSNAConfigGroupCipherSize=%d\n" | |
2152 | "dot11RSNAConfigPMKLifetime=%d\n" | |
2153 | "dot11RSNAConfigPMKReauthThreshold=%d\n" | |
2154 | "dot11RSNAConfigNumberOfPTKSAReplayCounters=1\n" | |
2155 | "dot11RSNAConfigSATimeout=%d\n", | |
2156 | rsna ? "TRUE" : "FALSE", | |
2157 | rsna ? "TRUE" : "FALSE", | |
2158 | RSN_VERSION, | |
c3550295 | 2159 | wpa_cipher_key_len(sm->group_cipher) * 8, |
6fc6879b JM |
2160 | sm->dot11RSNAConfigPMKLifetime, |
2161 | sm->dot11RSNAConfigPMKReauthThreshold, | |
2162 | sm->dot11RSNAConfigSATimeout); | |
d85e1fc8 | 2163 | if (os_snprintf_error(buflen, ret)) |
6fc6879b JM |
2164 | return 0; |
2165 | len = ret; | |
2166 | ||
2167 | ret = os_snprintf( | |
2168 | buf + len, buflen - len, | |
2169 | "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n" | |
2170 | "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n" | |
2171 | "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n" | |
2172 | "dot11RSNAPMKIDUsed=%s\n" | |
2173 | "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n" | |
2174 | "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n" | |
2175 | "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n" | |
2176 | "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n" | |
2177 | "dot11RSNA4WayHandshakeFailures=%u\n", | |
2178 | RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)), | |
c3550295 JM |
2179 | RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, |
2180 | sm->pairwise_cipher)), | |
2181 | RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, | |
2182 | sm->group_cipher)), | |
6fc6879b JM |
2183 | pmkid_txt, |
2184 | RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)), | |
c3550295 JM |
2185 | RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, |
2186 | sm->pairwise_cipher)), | |
2187 | RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, | |
2188 | sm->group_cipher)), | |
6fc6879b | 2189 | sm->dot11RSNA4WayHandshakeFailures); |
1f102d3b | 2190 | if (!os_snprintf_error(buflen - len, ret)) |
6fc6879b JM |
2191 | len += ret; |
2192 | ||
2193 | return (int) len; | |
2194 | } | |
2195 | #endif /* CONFIG_CTRL_IFACE */ | |
2196 | ||
2197 | ||
2198 | static void wpa_sm_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry, | |
6aaac006 | 2199 | void *ctx, enum pmksa_free_reason reason) |
6fc6879b JM |
2200 | { |
2201 | struct wpa_sm *sm = ctx; | |
6aaac006 | 2202 | int deauth = 0; |
6fc6879b | 2203 | |
6aaac006 DW |
2204 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: PMKSA cache entry free_cb: " |
2205 | MACSTR " reason=%d", MAC2STR(entry->aa), reason); | |
2206 | ||
2207 | if (sm->cur_pmksa == entry) { | |
2208 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
2209 | "RSN: %s current PMKSA entry", | |
2210 | reason == PMKSA_REPLACE ? "replaced" : "removed"); | |
2211 | pmksa_cache_clear_current(sm); | |
2212 | ||
2213 | /* | |
2214 | * If an entry is simply being replaced, there's no need to | |
2215 | * deauthenticate because it will be immediately re-added. | |
2216 | * This happens when EAP authentication is completed again | |
2217 | * (reauth or failed PMKSA caching attempt). | |
2218 | */ | |
2219 | if (reason != PMKSA_REPLACE) | |
2220 | deauth = 1; | |
2221 | } | |
2222 | ||
2223 | if (reason == PMKSA_EXPIRE && | |
6fc6879b JM |
2224 | (sm->pmk_len == entry->pmk_len && |
2225 | os_memcmp(sm->pmk, entry->pmk, sm->pmk_len) == 0)) { | |
f049052b | 2226 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
6aaac006 DW |
2227 | "RSN: deauthenticating due to expired PMK"); |
2228 | pmksa_cache_clear_current(sm); | |
2229 | deauth = 1; | |
2230 | } | |
6fc6879b | 2231 | |
6aaac006 | 2232 | if (deauth) { |
6fc6879b JM |
2233 | os_memset(sm->pmk, 0, sizeof(sm->pmk)); |
2234 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); | |
6fc6879b JM |
2235 | } |
2236 | } | |
2237 | ||
2238 | ||
2239 | /** | |
2240 | * wpa_sm_init - Initialize WPA state machine | |
2241 | * @ctx: Context pointer for callbacks; this needs to be an allocated buffer | |
2242 | * Returns: Pointer to the allocated WPA state machine data | |
2243 | * | |
2244 | * This function is used to allocate a new WPA state machine and the returned | |
2245 | * value is passed to all WPA state machine calls. | |
2246 | */ | |
2247 | struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx) | |
2248 | { | |
2249 | struct wpa_sm *sm; | |
2250 | ||
2251 | sm = os_zalloc(sizeof(*sm)); | |
2252 | if (sm == NULL) | |
2253 | return NULL; | |
c5b26e33 | 2254 | dl_list_init(&sm->pmksa_candidates); |
6fc6879b JM |
2255 | sm->renew_snonce = 1; |
2256 | sm->ctx = ctx; | |
2257 | ||
2258 | sm->dot11RSNAConfigPMKLifetime = 43200; | |
2259 | sm->dot11RSNAConfigPMKReauthThreshold = 70; | |
2260 | sm->dot11RSNAConfigSATimeout = 60; | |
2261 | ||
2262 | sm->pmksa = pmksa_cache_init(wpa_sm_pmksa_free_cb, sm, sm); | |
2263 | if (sm->pmksa == NULL) { | |
f049052b BG |
2264 | wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, |
2265 | "RSN: PMKSA cache initialization failed"); | |
6fc6879b JM |
2266 | os_free(sm); |
2267 | return NULL; | |
2268 | } | |
2269 | ||
2270 | return sm; | |
2271 | } | |
2272 | ||
2273 | ||
2274 | /** | |
2275 | * wpa_sm_deinit - Deinitialize WPA state machine | |
2276 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2277 | */ | |
2278 | void wpa_sm_deinit(struct wpa_sm *sm) | |
2279 | { | |
2280 | if (sm == NULL) | |
2281 | return; | |
2282 | pmksa_cache_deinit(sm->pmksa); | |
2283 | eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL); | |
581a8cde | 2284 | eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); |
6fc6879b JM |
2285 | os_free(sm->assoc_wpa_ie); |
2286 | os_free(sm->ap_wpa_ie); | |
2287 | os_free(sm->ap_rsn_ie); | |
71932544 | 2288 | wpa_sm_drop_sa(sm); |
6fc6879b JM |
2289 | os_free(sm->ctx); |
2290 | peerkey_deinit(sm); | |
55046414 JM |
2291 | #ifdef CONFIG_IEEE80211R |
2292 | os_free(sm->assoc_resp_ies); | |
2293 | #endif /* CONFIG_IEEE80211R */ | |
6fc6879b JM |
2294 | os_free(sm); |
2295 | } | |
2296 | ||
2297 | ||
2298 | /** | |
2299 | * wpa_sm_notify_assoc - Notify WPA state machine about association | |
2300 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2301 | * @bssid: The BSSID of the new association | |
2302 | * | |
2303 | * This function is called to let WPA state machine know that the connection | |
2304 | * was established. | |
2305 | */ | |
2306 | void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid) | |
2307 | { | |
58a98fb0 JM |
2308 | int clear_ptk = 1; |
2309 | ||
6fc6879b JM |
2310 | if (sm == NULL) |
2311 | return; | |
2312 | ||
f049052b BG |
2313 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2314 | "WPA: Association event - clear replay counter"); | |
6fc6879b JM |
2315 | os_memcpy(sm->bssid, bssid, ETH_ALEN); |
2316 | os_memset(sm->rx_replay_counter, 0, WPA_REPLAY_COUNTER_LEN); | |
2317 | sm->rx_replay_counter_set = 0; | |
2318 | sm->renew_snonce = 1; | |
2319 | if (os_memcmp(sm->preauth_bssid, bssid, ETH_ALEN) == 0) | |
2320 | rsn_preauth_deinit(sm); | |
2321 | ||
2322 | #ifdef CONFIG_IEEE80211R | |
58a98fb0 | 2323 | if (wpa_ft_is_completed(sm)) { |
5d5a9f00 JM |
2324 | /* |
2325 | * Clear portValid to kick EAPOL state machine to re-enter | |
2326 | * AUTHENTICATED state to get the EAPOL port Authorized. | |
2327 | */ | |
2328 | eapol_sm_notify_portValid(sm->eapol, FALSE); | |
6fc6879b JM |
2329 | wpa_supplicant_key_neg_complete(sm, sm->bssid, 1); |
2330 | ||
2331 | /* Prepare for the next transition */ | |
76b7981d | 2332 | wpa_ft_prepare_auth_request(sm, NULL); |
58a98fb0 JM |
2333 | |
2334 | clear_ptk = 0; | |
6fc6879b JM |
2335 | } |
2336 | #endif /* CONFIG_IEEE80211R */ | |
58a98fb0 JM |
2337 | |
2338 | if (clear_ptk) { | |
2339 | /* | |
2340 | * IEEE 802.11, 8.4.10: Delete PTK SA on (re)association if | |
2341 | * this is not part of a Fast BSS Transition. | |
2342 | */ | |
f049052b | 2343 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PTK"); |
58a98fb0 | 2344 | sm->ptk_set = 0; |
d2c33b91 | 2345 | os_memset(&sm->ptk, 0, sizeof(sm->ptk)); |
58a98fb0 | 2346 | sm->tptk_set = 0; |
d2c33b91 | 2347 | os_memset(&sm->tptk, 0, sizeof(sm->tptk)); |
58a98fb0 | 2348 | } |
40cf22e6 JM |
2349 | |
2350 | #ifdef CONFIG_TDLS | |
2351 | wpa_tdls_assoc(sm); | |
2352 | #endif /* CONFIG_TDLS */ | |
25ef8529 JM |
2353 | |
2354 | #ifdef CONFIG_P2P | |
2355 | os_memset(sm->p2p_ip_addr, 0, sizeof(sm->p2p_ip_addr)); | |
2356 | #endif /* CONFIG_P2P */ | |
6fc6879b JM |
2357 | } |
2358 | ||
2359 | ||
2360 | /** | |
2361 | * wpa_sm_notify_disassoc - Notify WPA state machine about disassociation | |
2362 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2363 | * | |
2364 | * This function is called to let WPA state machine know that the connection | |
2365 | * was lost. This will abort any existing pre-authentication session. | |
2366 | */ | |
2367 | void wpa_sm_notify_disassoc(struct wpa_sm *sm) | |
2368 | { | |
ac8e074e JM |
2369 | eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL); |
2370 | eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); | |
77327298 | 2371 | peerkey_deinit(sm); |
6fc6879b | 2372 | rsn_preauth_deinit(sm); |
0639970d | 2373 | pmksa_cache_clear_current(sm); |
6fc6879b JM |
2374 | if (wpa_sm_get_state(sm) == WPA_4WAY_HANDSHAKE) |
2375 | sm->dot11RSNA4WayHandshakeFailures++; | |
40cf22e6 JM |
2376 | #ifdef CONFIG_TDLS |
2377 | wpa_tdls_disassoc(sm); | |
2378 | #endif /* CONFIG_TDLS */ | |
71932544 JM |
2379 | |
2380 | /* Keys are not needed in the WPA state machine anymore */ | |
2381 | wpa_sm_drop_sa(sm); | |
761396e4 JM |
2382 | |
2383 | sm->msg_3_of_4_ok = 0; | |
6fc6879b JM |
2384 | } |
2385 | ||
2386 | ||
2387 | /** | |
2388 | * wpa_sm_set_pmk - Set PMK | |
2389 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2390 | * @pmk: The new PMK | |
2391 | * @pmk_len: The length of the new PMK in bytes | |
bc26ac50 | 2392 | * @bssid: AA to add into PMKSA cache or %NULL to not cache the PMK |
6fc6879b JM |
2393 | * |
2394 | * Configure the PMK for WPA state machine. | |
2395 | */ | |
bc26ac50 JM |
2396 | void wpa_sm_set_pmk(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len, |
2397 | const u8 *bssid) | |
6fc6879b JM |
2398 | { |
2399 | if (sm == NULL) | |
2400 | return; | |
2401 | ||
2402 | sm->pmk_len = pmk_len; | |
2403 | os_memcpy(sm->pmk, pmk, pmk_len); | |
2404 | ||
2405 | #ifdef CONFIG_IEEE80211R | |
2406 | /* Set XXKey to be PSK for FT key derivation */ | |
2407 | sm->xxkey_len = pmk_len; | |
2408 | os_memcpy(sm->xxkey, pmk, pmk_len); | |
2409 | #endif /* CONFIG_IEEE80211R */ | |
bc26ac50 JM |
2410 | |
2411 | if (bssid) { | |
087a1f4e JM |
2412 | pmksa_cache_add(sm->pmksa, pmk, pmk_len, NULL, 0, |
2413 | bssid, sm->own_addr, | |
bc26ac50 JM |
2414 | sm->network_ctx, sm->key_mgmt); |
2415 | } | |
6fc6879b JM |
2416 | } |
2417 | ||
2418 | ||
2419 | /** | |
2420 | * wpa_sm_set_pmk_from_pmksa - Set PMK based on the current PMKSA | |
2421 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2422 | * | |
2423 | * Take the PMK from the current PMKSA into use. If no PMKSA is active, the PMK | |
2424 | * will be cleared. | |
2425 | */ | |
2426 | void wpa_sm_set_pmk_from_pmksa(struct wpa_sm *sm) | |
2427 | { | |
2428 | if (sm == NULL) | |
2429 | return; | |
2430 | ||
2431 | if (sm->cur_pmksa) { | |
2432 | sm->pmk_len = sm->cur_pmksa->pmk_len; | |
2433 | os_memcpy(sm->pmk, sm->cur_pmksa->pmk, sm->pmk_len); | |
2434 | } else { | |
2435 | sm->pmk_len = PMK_LEN; | |
2436 | os_memset(sm->pmk, 0, PMK_LEN); | |
2437 | } | |
2438 | } | |
2439 | ||
2440 | ||
2441 | /** | |
2442 | * wpa_sm_set_fast_reauth - Set fast reauthentication (EAP) enabled/disabled | |
2443 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2444 | * @fast_reauth: Whether fast reauthentication (EAP) is allowed | |
2445 | */ | |
2446 | void wpa_sm_set_fast_reauth(struct wpa_sm *sm, int fast_reauth) | |
2447 | { | |
2448 | if (sm) | |
2449 | sm->fast_reauth = fast_reauth; | |
2450 | } | |
2451 | ||
2452 | ||
2453 | /** | |
2454 | * wpa_sm_set_scard_ctx - Set context pointer for smartcard callbacks | |
2455 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2456 | * @scard_ctx: Context pointer for smartcard related callback functions | |
2457 | */ | |
2458 | void wpa_sm_set_scard_ctx(struct wpa_sm *sm, void *scard_ctx) | |
2459 | { | |
2460 | if (sm == NULL) | |
2461 | return; | |
2462 | sm->scard_ctx = scard_ctx; | |
2463 | if (sm->preauth_eapol) | |
2464 | eapol_sm_register_scard_ctx(sm->preauth_eapol, scard_ctx); | |
2465 | } | |
2466 | ||
2467 | ||
2468 | /** | |
2469 | * wpa_sm_set_config - Notification of current configration change | |
2470 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2471 | * @config: Pointer to current network configuration | |
2472 | * | |
2473 | * Notify WPA state machine that configuration has changed. config will be | |
2474 | * stored as a backpointer to network configuration. This can be %NULL to clear | |
2475 | * the stored pointed. | |
2476 | */ | |
2477 | void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config) | |
2478 | { | |
2479 | if (!sm) | |
2480 | return; | |
2481 | ||
6fc6879b | 2482 | if (config) { |
886a807f | 2483 | sm->network_ctx = config->network_ctx; |
6fc6879b JM |
2484 | sm->peerkey_enabled = config->peerkey_enabled; |
2485 | sm->allowed_pairwise_cipher = config->allowed_pairwise_cipher; | |
2486 | sm->proactive_key_caching = config->proactive_key_caching; | |
2487 | sm->eap_workaround = config->eap_workaround; | |
2488 | sm->eap_conf_ctx = config->eap_conf_ctx; | |
2489 | if (config->ssid) { | |
2490 | os_memcpy(sm->ssid, config->ssid, config->ssid_len); | |
2491 | sm->ssid_len = config->ssid_len; | |
2492 | } else | |
2493 | sm->ssid_len = 0; | |
581a8cde | 2494 | sm->wpa_ptk_rekey = config->wpa_ptk_rekey; |
25ef8529 | 2495 | sm->p2p = config->p2p; |
73ed03f3 | 2496 | sm->wpa_rsc_relaxation = config->wpa_rsc_relaxation; |
6fc6879b | 2497 | } else { |
886a807f | 2498 | sm->network_ctx = NULL; |
6fc6879b JM |
2499 | sm->peerkey_enabled = 0; |
2500 | sm->allowed_pairwise_cipher = 0; | |
2501 | sm->proactive_key_caching = 0; | |
2502 | sm->eap_workaround = 0; | |
2503 | sm->eap_conf_ctx = NULL; | |
2504 | sm->ssid_len = 0; | |
581a8cde | 2505 | sm->wpa_ptk_rekey = 0; |
25ef8529 | 2506 | sm->p2p = 0; |
73ed03f3 | 2507 | sm->wpa_rsc_relaxation = 0; |
6fc6879b | 2508 | } |
6fc6879b JM |
2509 | } |
2510 | ||
2511 | ||
2512 | /** | |
2513 | * wpa_sm_set_own_addr - Set own MAC address | |
2514 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2515 | * @addr: Own MAC address | |
2516 | */ | |
2517 | void wpa_sm_set_own_addr(struct wpa_sm *sm, const u8 *addr) | |
2518 | { | |
2519 | if (sm) | |
2520 | os_memcpy(sm->own_addr, addr, ETH_ALEN); | |
2521 | } | |
2522 | ||
2523 | ||
2524 | /** | |
2525 | * wpa_sm_set_ifname - Set network interface name | |
2526 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2527 | * @ifname: Interface name | |
2528 | * @bridge_ifname: Optional bridge interface name (for pre-auth) | |
2529 | */ | |
2530 | void wpa_sm_set_ifname(struct wpa_sm *sm, const char *ifname, | |
2531 | const char *bridge_ifname) | |
2532 | { | |
2533 | if (sm) { | |
2534 | sm->ifname = ifname; | |
2535 | sm->bridge_ifname = bridge_ifname; | |
2536 | } | |
2537 | } | |
2538 | ||
2539 | ||
2540 | /** | |
2541 | * wpa_sm_set_eapol - Set EAPOL state machine pointer | |
2542 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2543 | * @eapol: Pointer to EAPOL state machine allocated with eapol_sm_init() | |
2544 | */ | |
2545 | void wpa_sm_set_eapol(struct wpa_sm *sm, struct eapol_sm *eapol) | |
2546 | { | |
2547 | if (sm) | |
2548 | sm->eapol = eapol; | |
2549 | } | |
2550 | ||
2551 | ||
2552 | /** | |
2553 | * wpa_sm_set_param - Set WPA state machine parameters | |
2554 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2555 | * @param: Parameter field | |
2556 | * @value: Parameter value | |
2557 | * Returns: 0 on success, -1 on failure | |
2558 | */ | |
2559 | int wpa_sm_set_param(struct wpa_sm *sm, enum wpa_sm_conf_params param, | |
2560 | unsigned int value) | |
2561 | { | |
2562 | int ret = 0; | |
2563 | ||
2564 | if (sm == NULL) | |
2565 | return -1; | |
2566 | ||
2567 | switch (param) { | |
2568 | case RSNA_PMK_LIFETIME: | |
2569 | if (value > 0) | |
2570 | sm->dot11RSNAConfigPMKLifetime = value; | |
2571 | else | |
2572 | ret = -1; | |
2573 | break; | |
2574 | case RSNA_PMK_REAUTH_THRESHOLD: | |
2575 | if (value > 0 && value <= 100) | |
2576 | sm->dot11RSNAConfigPMKReauthThreshold = value; | |
2577 | else | |
2578 | ret = -1; | |
2579 | break; | |
2580 | case RSNA_SA_TIMEOUT: | |
2581 | if (value > 0) | |
2582 | sm->dot11RSNAConfigSATimeout = value; | |
2583 | else | |
2584 | ret = -1; | |
2585 | break; | |
2586 | case WPA_PARAM_PROTO: | |
2587 | sm->proto = value; | |
2588 | break; | |
2589 | case WPA_PARAM_PAIRWISE: | |
2590 | sm->pairwise_cipher = value; | |
2591 | break; | |
2592 | case WPA_PARAM_GROUP: | |
2593 | sm->group_cipher = value; | |
2594 | break; | |
2595 | case WPA_PARAM_KEY_MGMT: | |
2596 | sm->key_mgmt = value; | |
2597 | break; | |
2598 | #ifdef CONFIG_IEEE80211W | |
2599 | case WPA_PARAM_MGMT_GROUP: | |
2600 | sm->mgmt_group_cipher = value; | |
2601 | break; | |
2602 | #endif /* CONFIG_IEEE80211W */ | |
2603 | case WPA_PARAM_RSN_ENABLED: | |
2604 | sm->rsn_enabled = value; | |
2605 | break; | |
e820cf95 JM |
2606 | case WPA_PARAM_MFP: |
2607 | sm->mfp = value; | |
2608 | break; | |
6fc6879b JM |
2609 | default: |
2610 | break; | |
2611 | } | |
2612 | ||
2613 | return ret; | |
2614 | } | |
2615 | ||
2616 | ||
6fc6879b JM |
2617 | /** |
2618 | * wpa_sm_get_status - Get WPA state machine | |
2619 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2620 | * @buf: Buffer for status information | |
2621 | * @buflen: Maximum buffer length | |
2622 | * @verbose: Whether to include verbose status information | |
2623 | * Returns: Number of bytes written to buf. | |
2624 | * | |
2625 | * Query WPA state machine for status information. This function fills in | |
2626 | * a text area with current status information. If the buffer (buf) is not | |
2627 | * large enough, status information will be truncated to fit the buffer. | |
2628 | */ | |
2629 | int wpa_sm_get_status(struct wpa_sm *sm, char *buf, size_t buflen, | |
2630 | int verbose) | |
2631 | { | |
2632 | char *pos = buf, *end = buf + buflen; | |
2633 | int ret; | |
2634 | ||
2635 | ret = os_snprintf(pos, end - pos, | |
2636 | "pairwise_cipher=%s\n" | |
2637 | "group_cipher=%s\n" | |
2638 | "key_mgmt=%s\n", | |
2639 | wpa_cipher_txt(sm->pairwise_cipher), | |
2640 | wpa_cipher_txt(sm->group_cipher), | |
2641 | wpa_key_mgmt_txt(sm->key_mgmt, sm->proto)); | |
d85e1fc8 | 2642 | if (os_snprintf_error(end - pos, ret)) |
6fc6879b JM |
2643 | return pos - buf; |
2644 | pos += ret; | |
13e1d2e2 JM |
2645 | |
2646 | if (sm->mfp != NO_MGMT_FRAME_PROTECTION && sm->ap_rsn_ie) { | |
2647 | struct wpa_ie_data rsn; | |
2648 | if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) | |
2649 | >= 0 && | |
2650 | rsn.capabilities & (WPA_CAPABILITY_MFPR | | |
2651 | WPA_CAPABILITY_MFPC)) { | |
2652 | ret = os_snprintf(pos, end - pos, "pmf=%d\n", | |
2653 | (rsn.capabilities & | |
2654 | WPA_CAPABILITY_MFPR) ? 2 : 1); | |
d85e1fc8 | 2655 | if (os_snprintf_error(end - pos, ret)) |
13e1d2e2 JM |
2656 | return pos - buf; |
2657 | pos += ret; | |
2658 | } | |
2659 | } | |
2660 | ||
6fc6879b JM |
2661 | return pos - buf; |
2662 | } | |
2663 | ||
2664 | ||
ae8535b6 JM |
2665 | int wpa_sm_pmf_enabled(struct wpa_sm *sm) |
2666 | { | |
2667 | struct wpa_ie_data rsn; | |
2668 | ||
2669 | if (sm->mfp == NO_MGMT_FRAME_PROTECTION || !sm->ap_rsn_ie) | |
2670 | return 0; | |
2671 | ||
2672 | if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) >= 0 && | |
2673 | rsn.capabilities & (WPA_CAPABILITY_MFPR | WPA_CAPABILITY_MFPC)) | |
2674 | return 1; | |
2675 | ||
2676 | return 0; | |
2677 | } | |
2678 | ||
2679 | ||
6fc6879b JM |
2680 | /** |
2681 | * wpa_sm_set_assoc_wpa_ie_default - Generate own WPA/RSN IE from configuration | |
2682 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2683 | * @wpa_ie: Pointer to buffer for WPA/RSN IE | |
2684 | * @wpa_ie_len: Pointer to the length of the wpa_ie buffer | |
2685 | * Returns: 0 on success, -1 on failure | |
2686 | */ | |
2687 | int wpa_sm_set_assoc_wpa_ie_default(struct wpa_sm *sm, u8 *wpa_ie, | |
2688 | size_t *wpa_ie_len) | |
2689 | { | |
2690 | int res; | |
2691 | ||
2692 | if (sm == NULL) | |
2693 | return -1; | |
2694 | ||
2695 | res = wpa_gen_wpa_ie(sm, wpa_ie, *wpa_ie_len); | |
2696 | if (res < 0) | |
2697 | return -1; | |
2698 | *wpa_ie_len = res; | |
2699 | ||
2700 | wpa_hexdump(MSG_DEBUG, "WPA: Set own WPA IE default", | |
2701 | wpa_ie, *wpa_ie_len); | |
2702 | ||
2703 | if (sm->assoc_wpa_ie == NULL) { | |
2704 | /* | |
2705 | * Make a copy of the WPA/RSN IE so that 4-Way Handshake gets | |
2706 | * the correct version of the IE even if PMKSA caching is | |
2707 | * aborted (which would remove PMKID from IE generation). | |
2708 | */ | |
2709 | sm->assoc_wpa_ie = os_malloc(*wpa_ie_len); | |
2710 | if (sm->assoc_wpa_ie == NULL) | |
2711 | return -1; | |
2712 | ||
2713 | os_memcpy(sm->assoc_wpa_ie, wpa_ie, *wpa_ie_len); | |
2714 | sm->assoc_wpa_ie_len = *wpa_ie_len; | |
2715 | } | |
2716 | ||
2717 | return 0; | |
2718 | } | |
2719 | ||
2720 | ||
2721 | /** | |
2722 | * wpa_sm_set_assoc_wpa_ie - Set own WPA/RSN IE from (Re)AssocReq | |
2723 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2724 | * @ie: Pointer to IE data (starting from id) | |
2725 | * @len: IE length | |
2726 | * Returns: 0 on success, -1 on failure | |
2727 | * | |
2728 | * Inform WPA state machine about the WPA/RSN IE used in (Re)Association | |
2729 | * Request frame. The IE will be used to override the default value generated | |
2730 | * with wpa_sm_set_assoc_wpa_ie_default(). | |
2731 | */ | |
2732 | int wpa_sm_set_assoc_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len) | |
2733 | { | |
2734 | if (sm == NULL) | |
2735 | return -1; | |
2736 | ||
2737 | os_free(sm->assoc_wpa_ie); | |
2738 | if (ie == NULL || len == 0) { | |
f049052b BG |
2739 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2740 | "WPA: clearing own WPA/RSN IE"); | |
6fc6879b JM |
2741 | sm->assoc_wpa_ie = NULL; |
2742 | sm->assoc_wpa_ie_len = 0; | |
2743 | } else { | |
2744 | wpa_hexdump(MSG_DEBUG, "WPA: set own WPA/RSN IE", ie, len); | |
2745 | sm->assoc_wpa_ie = os_malloc(len); | |
2746 | if (sm->assoc_wpa_ie == NULL) | |
2747 | return -1; | |
2748 | ||
2749 | os_memcpy(sm->assoc_wpa_ie, ie, len); | |
2750 | sm->assoc_wpa_ie_len = len; | |
2751 | } | |
2752 | ||
2753 | return 0; | |
2754 | } | |
2755 | ||
2756 | ||
2757 | /** | |
2758 | * wpa_sm_set_ap_wpa_ie - Set AP WPA IE from Beacon/ProbeResp | |
2759 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2760 | * @ie: Pointer to IE data (starting from id) | |
2761 | * @len: IE length | |
2762 | * Returns: 0 on success, -1 on failure | |
2763 | * | |
2764 | * Inform WPA state machine about the WPA IE used in Beacon / Probe Response | |
2765 | * frame. | |
2766 | */ | |
2767 | int wpa_sm_set_ap_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len) | |
2768 | { | |
2769 | if (sm == NULL) | |
2770 | return -1; | |
2771 | ||
2772 | os_free(sm->ap_wpa_ie); | |
2773 | if (ie == NULL || len == 0) { | |
f049052b BG |
2774 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2775 | "WPA: clearing AP WPA IE"); | |
6fc6879b JM |
2776 | sm->ap_wpa_ie = NULL; |
2777 | sm->ap_wpa_ie_len = 0; | |
2778 | } else { | |
2779 | wpa_hexdump(MSG_DEBUG, "WPA: set AP WPA IE", ie, len); | |
2780 | sm->ap_wpa_ie = os_malloc(len); | |
2781 | if (sm->ap_wpa_ie == NULL) | |
2782 | return -1; | |
2783 | ||
2784 | os_memcpy(sm->ap_wpa_ie, ie, len); | |
2785 | sm->ap_wpa_ie_len = len; | |
2786 | } | |
2787 | ||
2788 | return 0; | |
2789 | } | |
2790 | ||
2791 | ||
2792 | /** | |
2793 | * wpa_sm_set_ap_rsn_ie - Set AP RSN IE from Beacon/ProbeResp | |
2794 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2795 | * @ie: Pointer to IE data (starting from id) | |
2796 | * @len: IE length | |
2797 | * Returns: 0 on success, -1 on failure | |
2798 | * | |
2799 | * Inform WPA state machine about the RSN IE used in Beacon / Probe Response | |
2800 | * frame. | |
2801 | */ | |
2802 | int wpa_sm_set_ap_rsn_ie(struct wpa_sm *sm, const u8 *ie, size_t len) | |
2803 | { | |
2804 | if (sm == NULL) | |
2805 | return -1; | |
2806 | ||
2807 | os_free(sm->ap_rsn_ie); | |
2808 | if (ie == NULL || len == 0) { | |
f049052b BG |
2809 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2810 | "WPA: clearing AP RSN IE"); | |
6fc6879b JM |
2811 | sm->ap_rsn_ie = NULL; |
2812 | sm->ap_rsn_ie_len = 0; | |
2813 | } else { | |
2814 | wpa_hexdump(MSG_DEBUG, "WPA: set AP RSN IE", ie, len); | |
2815 | sm->ap_rsn_ie = os_malloc(len); | |
2816 | if (sm->ap_rsn_ie == NULL) | |
2817 | return -1; | |
2818 | ||
2819 | os_memcpy(sm->ap_rsn_ie, ie, len); | |
2820 | sm->ap_rsn_ie_len = len; | |
2821 | } | |
2822 | ||
2823 | return 0; | |
2824 | } | |
2825 | ||
2826 | ||
2827 | /** | |
2828 | * wpa_sm_parse_own_wpa_ie - Parse own WPA/RSN IE | |
2829 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2830 | * @data: Pointer to data area for parsing results | |
2831 | * Returns: 0 on success, -1 if IE is not known, or -2 on parsing failure | |
2832 | * | |
2833 | * Parse the contents of the own WPA or RSN IE from (Re)AssocReq and write the | |
2834 | * parsed data into data. | |
2835 | */ | |
2836 | int wpa_sm_parse_own_wpa_ie(struct wpa_sm *sm, struct wpa_ie_data *data) | |
2837 | { | |
2a522e71 JM |
2838 | if (sm == NULL) |
2839 | return -1; | |
2840 | ||
2841 | if (sm->assoc_wpa_ie == NULL) { | |
f049052b BG |
2842 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2843 | "WPA: No WPA/RSN IE available from association info"); | |
6fc6879b JM |
2844 | return -1; |
2845 | } | |
2846 | if (wpa_parse_wpa_ie(sm->assoc_wpa_ie, sm->assoc_wpa_ie_len, data)) | |
2847 | return -2; | |
2848 | return 0; | |
2849 | } | |
540264a7 JM |
2850 | |
2851 | ||
2852 | int wpa_sm_pmksa_cache_list(struct wpa_sm *sm, char *buf, size_t len) | |
2853 | { | |
540264a7 | 2854 | return pmksa_cache_list(sm->pmksa, buf, len); |
540264a7 | 2855 | } |
32d5295f JM |
2856 | |
2857 | ||
2858 | void wpa_sm_drop_sa(struct wpa_sm *sm) | |
2859 | { | |
f049052b | 2860 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PMK and PTK"); |
32d5295f JM |
2861 | sm->ptk_set = 0; |
2862 | sm->tptk_set = 0; | |
2863 | os_memset(sm->pmk, 0, sizeof(sm->pmk)); | |
2864 | os_memset(&sm->ptk, 0, sizeof(sm->ptk)); | |
2865 | os_memset(&sm->tptk, 0, sizeof(sm->tptk)); | |
71932544 JM |
2866 | #ifdef CONFIG_IEEE80211R |
2867 | os_memset(sm->xxkey, 0, sizeof(sm->xxkey)); | |
2868 | os_memset(sm->pmk_r0, 0, sizeof(sm->pmk_r0)); | |
2869 | os_memset(sm->pmk_r1, 0, sizeof(sm->pmk_r1)); | |
2870 | #endif /* CONFIG_IEEE80211R */ | |
32d5295f | 2871 | } |
0d7b4409 JM |
2872 | |
2873 | ||
2874 | int wpa_sm_has_ptk(struct wpa_sm *sm) | |
2875 | { | |
2876 | if (sm == NULL) | |
2877 | return 0; | |
2878 | return sm->ptk_set; | |
2879 | } | |
b14a210c JB |
2880 | |
2881 | ||
2882 | void wpa_sm_update_replay_ctr(struct wpa_sm *sm, const u8 *replay_ctr) | |
2883 | { | |
2884 | os_memcpy(sm->rx_replay_counter, replay_ctr, WPA_REPLAY_COUNTER_LEN); | |
2885 | } | |
d8a790b9 JM |
2886 | |
2887 | ||
2888 | void wpa_sm_pmksa_cache_flush(struct wpa_sm *sm, void *network_ctx) | |
2889 | { | |
4033935d | 2890 | pmksa_cache_flush(sm->pmksa, network_ctx, NULL, 0); |
d8a790b9 | 2891 | } |
75cad1a0 XC |
2892 | |
2893 | ||
ad3872a3 | 2894 | #ifdef CONFIG_WNM |
75cad1a0 XC |
2895 | int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 subelem_id, u8 *buf) |
2896 | { | |
75cad1a0 XC |
2897 | u16 keyinfo; |
2898 | u8 keylen; /* plaintext key len */ | |
75cad1a0 XC |
2899 | u8 *key_rsc; |
2900 | ||
75cad1a0 | 2901 | if (subelem_id == WNM_SLEEP_SUBELEM_GTK) { |
d2c33b91 JM |
2902 | struct wpa_gtk_data gd; |
2903 | ||
2904 | os_memset(&gd, 0, sizeof(gd)); | |
2905 | keylen = wpa_cipher_key_len(sm->group_cipher); | |
2906 | gd.key_rsc_len = wpa_cipher_rsc_len(sm->group_cipher); | |
2907 | gd.alg = wpa_cipher_to_alg(sm->group_cipher); | |
2908 | if (gd.alg == WPA_ALG_NONE) { | |
2909 | wpa_printf(MSG_DEBUG, "Unsupported group cipher suite"); | |
2910 | return -1; | |
2911 | } | |
2912 | ||
75cad1a0 | 2913 | key_rsc = buf + 5; |
68db9ab0 | 2914 | keyinfo = WPA_GET_LE16(buf + 2); |
75cad1a0 XC |
2915 | gd.gtk_len = keylen; |
2916 | if (gd.gtk_len != buf[4]) { | |
2917 | wpa_printf(MSG_DEBUG, "GTK len mismatch len %d vs %d", | |
2918 | gd.gtk_len, buf[4]); | |
2919 | return -1; | |
2920 | } | |
2921 | gd.keyidx = keyinfo & 0x03; /* B0 - B1 */ | |
2922 | gd.tx = wpa_supplicant_gtk_tx_bit_workaround( | |
2923 | sm, !!(keyinfo & WPA_KEY_INFO_TXRX)); | |
2924 | ||
68db9ab0 | 2925 | os_memcpy(gd.gtk, buf + 13, gd.gtk_len); |
75cad1a0 XC |
2926 | |
2927 | wpa_hexdump_key(MSG_DEBUG, "Install GTK (WNM SLEEP)", | |
2928 | gd.gtk, gd.gtk_len); | |
2929 | if (wpa_supplicant_install_gtk(sm, &gd, key_rsc)) { | |
d2c33b91 | 2930 | os_memset(&gd, 0, sizeof(gd)); |
75cad1a0 XC |
2931 | wpa_printf(MSG_DEBUG, "Failed to install the GTK in " |
2932 | "WNM mode"); | |
2933 | return -1; | |
2934 | } | |
d2c33b91 | 2935 | os_memset(&gd, 0, sizeof(gd)); |
75cad1a0 XC |
2936 | #ifdef CONFIG_IEEE80211W |
2937 | } else if (subelem_id == WNM_SLEEP_SUBELEM_IGTK) { | |
d2c33b91 JM |
2938 | struct wpa_igtk_kde igd; |
2939 | u16 keyidx; | |
2940 | ||
2941 | os_memset(&igd, 0, sizeof(igd)); | |
8dd9f9cd | 2942 | keylen = wpa_cipher_key_len(sm->mgmt_group_cipher); |
75cad1a0 XC |
2943 | os_memcpy(igd.keyid, buf + 2, 2); |
2944 | os_memcpy(igd.pn, buf + 4, 6); | |
2945 | ||
2946 | keyidx = WPA_GET_LE16(igd.keyid); | |
8dd9f9cd | 2947 | os_memcpy(igd.igtk, buf + 10, keylen); |
75cad1a0 XC |
2948 | |
2949 | wpa_hexdump_key(MSG_DEBUG, "Install IGTK (WNM SLEEP)", | |
8dd9f9cd JM |
2950 | igd.igtk, keylen); |
2951 | if (wpa_sm_set_key(sm, wpa_cipher_to_alg(sm->mgmt_group_cipher), | |
2952 | broadcast_ether_addr, | |
75cad1a0 | 2953 | keyidx, 0, igd.pn, sizeof(igd.pn), |
8dd9f9cd | 2954 | igd.igtk, keylen) < 0) { |
75cad1a0 XC |
2955 | wpa_printf(MSG_DEBUG, "Failed to install the IGTK in " |
2956 | "WNM mode"); | |
d2c33b91 | 2957 | os_memset(&igd, 0, sizeof(igd)); |
75cad1a0 XC |
2958 | return -1; |
2959 | } | |
d2c33b91 | 2960 | os_memset(&igd, 0, sizeof(igd)); |
75cad1a0 XC |
2961 | #endif /* CONFIG_IEEE80211W */ |
2962 | } else { | |
2963 | wpa_printf(MSG_DEBUG, "Unknown element id"); | |
2964 | return -1; | |
2965 | } | |
2966 | ||
2967 | return 0; | |
2968 | } | |
ad3872a3 | 2969 | #endif /* CONFIG_WNM */ |
db76aa64 JM |
2970 | |
2971 | ||
2972 | #ifdef CONFIG_PEERKEY | |
2973 | int wpa_sm_rx_eapol_peerkey(struct wpa_sm *sm, const u8 *src_addr, | |
2974 | const u8 *buf, size_t len) | |
2975 | { | |
2976 | struct wpa_peerkey *peerkey; | |
2977 | ||
2978 | for (peerkey = sm->peerkey; peerkey; peerkey = peerkey->next) { | |
2979 | if (os_memcmp(peerkey->addr, src_addr, ETH_ALEN) == 0) | |
2980 | break; | |
2981 | } | |
2982 | ||
2983 | if (!peerkey) | |
2984 | return 0; | |
2985 | ||
2986 | wpa_sm_rx_eapol(sm, src_addr, buf, len); | |
2987 | ||
2988 | return 1; | |
2989 | } | |
2990 | #endif /* CONFIG_PEERKEY */ | |
25ef8529 JM |
2991 | |
2992 | ||
2993 | #ifdef CONFIG_P2P | |
2994 | ||
2995 | int wpa_sm_get_p2p_ip_addr(struct wpa_sm *sm, u8 *buf) | |
2996 | { | |
2997 | if (sm == NULL || WPA_GET_BE32(sm->p2p_ip_addr) == 0) | |
2998 | return -1; | |
2999 | os_memcpy(buf, sm->p2p_ip_addr, 3 * 4); | |
3000 | return 0; | |
3001 | } | |
3002 | ||
3003 | #endif /* CONFIG_P2P */ | |
b41f2684 CL |
3004 | |
3005 | ||
3006 | void wpa_sm_set_rx_replay_ctr(struct wpa_sm *sm, const u8 *rx_replay_counter) | |
3007 | { | |
3008 | if (rx_replay_counter == NULL) | |
3009 | return; | |
3010 | ||
3011 | os_memcpy(sm->rx_replay_counter, rx_replay_counter, | |
3012 | WPA_REPLAY_COUNTER_LEN); | |
3013 | sm->rx_replay_counter_set = 1; | |
3014 | wpa_printf(MSG_DEBUG, "Updated key replay counter"); | |
3015 | } | |
3016 | ||
3017 | ||
98cd3d1c JM |
3018 | void wpa_sm_set_ptk_kck_kek(struct wpa_sm *sm, |
3019 | const u8 *ptk_kck, size_t ptk_kck_len, | |
3020 | const u8 *ptk_kek, size_t ptk_kek_len) | |
b41f2684 | 3021 | { |
98cd3d1c JM |
3022 | if (ptk_kck && ptk_kck_len <= WPA_KCK_MAX_LEN) { |
3023 | os_memcpy(sm->ptk.kck, ptk_kck, ptk_kck_len); | |
3024 | sm->ptk.kck_len = ptk_kck_len; | |
b41f2684 CL |
3025 | wpa_printf(MSG_DEBUG, "Updated PTK KCK"); |
3026 | } | |
98cd3d1c JM |
3027 | if (ptk_kek && ptk_kek_len <= WPA_KEK_MAX_LEN) { |
3028 | os_memcpy(sm->ptk.kek, ptk_kek, ptk_kek_len); | |
3029 | sm->ptk.kek_len = ptk_kek_len; | |
b41f2684 CL |
3030 | wpa_printf(MSG_DEBUG, "Updated PTK KEK"); |
3031 | } | |
3032 | sm->ptk_set = 1; | |
3033 | } |