]>
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 | } | |
f5ff8ae6 | 67 | if (key_mic && mic_len && |
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 JM |
99 | struct wpa_eapol_key *reply; |
100 | int key_info, ver; | |
6d014ffc | 101 | u8 bssid[ETH_ALEN], *rbuf, *key_mic, *mic; |
6fc6879b | 102 | |
929a2ea5 JM |
103 | if (sm->key_mgmt == WPA_KEY_MGMT_OSEN || |
104 | wpa_key_mgmt_suite_b(sm->key_mgmt)) | |
df0f01d9 JM |
105 | ver = WPA_KEY_INFO_TYPE_AKM_DEFINED; |
106 | else if (wpa_key_mgmt_ft(sm->key_mgmt) || | |
107 | wpa_key_mgmt_sha256(sm->key_mgmt)) | |
6fc6879b | 108 | ver = WPA_KEY_INFO_TYPE_AES_128_CMAC; |
eb7719ff | 109 | else if (sm->pairwise_cipher != WPA_CIPHER_TKIP) |
6fc6879b JM |
110 | ver = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES; |
111 | else | |
112 | ver = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4; | |
113 | ||
114 | if (wpa_sm_get_bssid(sm, bssid) < 0) { | |
f049052b BG |
115 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
116 | "Failed to read BSSID for EAPOL-Key request"); | |
6fc6879b JM |
117 | return; |
118 | } | |
119 | ||
5e3b5197 | 120 | mic_len = wpa_mic_len(sm->key_mgmt); |
6d014ffc | 121 | hdrlen = sizeof(*reply) + mic_len + 2; |
6fc6879b | 122 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, |
5e3b5197 | 123 | hdrlen, &rlen, (void *) &reply); |
6fc6879b JM |
124 | if (rbuf == NULL) |
125 | return; | |
126 | ||
a14896e8 JM |
127 | reply->type = (sm->proto == WPA_PROTO_RSN || |
128 | sm->proto == WPA_PROTO_OSEN) ? | |
6fc6879b JM |
129 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; |
130 | key_info = WPA_KEY_INFO_REQUEST | ver; | |
131 | if (sm->ptk_set) | |
4a26ccda JM |
132 | key_info |= WPA_KEY_INFO_SECURE; |
133 | if (sm->ptk_set && mic_len) | |
134 | key_info |= WPA_KEY_INFO_MIC; | |
6fc6879b JM |
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 | ||
6d014ffc JM |
145 | mic = (u8 *) (reply + 1); |
146 | WPA_PUT_BE16(mic + mic_len, 0); | |
5e3b5197 JM |
147 | if (!(key_info & WPA_KEY_INFO_MIC)) |
148 | key_mic = NULL; | |
149 | else | |
6d014ffc | 150 | key_mic = mic; |
6fc6879b | 151 | |
f049052b BG |
152 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
153 | "WPA: Sending EAPOL-Key Request (error=%d " | |
154 | "pairwise=%d ptk_set=%d len=%lu)", | |
155 | error, pairwise, sm->ptk_set, (unsigned long) rlen); | |
98cd3d1c | 156 | wpa_eapol_key_send(sm, sm->ptk.kck, sm->ptk.kck_len, ver, bssid, |
5e3b5197 | 157 | ETH_P_EAPOL, rbuf, rlen, key_mic); |
6fc6879b JM |
158 | } |
159 | ||
160 | ||
b41f2684 CL |
161 | static void wpa_supplicant_key_mgmt_set_pmk(struct wpa_sm *sm) |
162 | { | |
163 | #ifdef CONFIG_IEEE80211R | |
164 | if (sm->key_mgmt == WPA_KEY_MGMT_FT_IEEE8021X) { | |
165 | if (wpa_sm_key_mgmt_set_pmk(sm, sm->xxkey, sm->xxkey_len)) | |
166 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
167 | "RSN: Cannot set low order 256 bits of MSK for key management offload"); | |
168 | } else { | |
169 | #endif /* CONFIG_IEEE80211R */ | |
170 | if (wpa_sm_key_mgmt_set_pmk(sm, sm->pmk, sm->pmk_len)) | |
171 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
172 | "RSN: Cannot set PMK for key management offload"); | |
173 | #ifdef CONFIG_IEEE80211R | |
174 | } | |
175 | #endif /* CONFIG_IEEE80211R */ | |
176 | } | |
177 | ||
178 | ||
6fc6879b JM |
179 | static int wpa_supplicant_get_pmk(struct wpa_sm *sm, |
180 | const unsigned char *src_addr, | |
181 | const u8 *pmkid) | |
182 | { | |
183 | int abort_cached = 0; | |
184 | ||
185 | if (pmkid && !sm->cur_pmksa) { | |
186 | /* When using drivers that generate RSN IE, wpa_supplicant may | |
187 | * not have enough time to get the association information | |
188 | * event before receiving this 1/4 message, so try to find a | |
189 | * matching PMKSA cache entry here. */ | |
96efeeb6 JM |
190 | sm->cur_pmksa = pmksa_cache_get(sm->pmksa, src_addr, pmkid, |
191 | NULL); | |
6fc6879b | 192 | if (sm->cur_pmksa) { |
f049052b BG |
193 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
194 | "RSN: found matching PMKID from PMKSA cache"); | |
6fc6879b | 195 | } else { |
f049052b BG |
196 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
197 | "RSN: no matching PMKID found"); | |
6fc6879b JM |
198 | abort_cached = 1; |
199 | } | |
200 | } | |
201 | ||
202 | if (pmkid && sm->cur_pmksa && | |
0d15b69f | 203 | os_memcmp_const(pmkid, sm->cur_pmksa->pmkid, PMKID_LEN) == 0) { |
6fc6879b JM |
204 | wpa_hexdump(MSG_DEBUG, "RSN: matched PMKID", pmkid, PMKID_LEN); |
205 | wpa_sm_set_pmk_from_pmksa(sm); | |
206 | wpa_hexdump_key(MSG_DEBUG, "RSN: PMK from PMKSA cache", | |
207 | sm->pmk, sm->pmk_len); | |
208 | eapol_sm_notify_cached(sm->eapol); | |
209 | #ifdef CONFIG_IEEE80211R | |
210 | sm->xxkey_len = 0; | |
211 | #endif /* CONFIG_IEEE80211R */ | |
56586197 | 212 | } else if (wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) && sm->eapol) { |
6fc6879b | 213 | int res, pmk_len; |
207976f0 JM |
214 | |
215 | if (sm->key_mgmt & WPA_KEY_MGMT_IEEE8021X_SUITE_B_192) | |
216 | pmk_len = PMK_LEN_SUITE_B_192; | |
217 | else | |
218 | pmk_len = PMK_LEN; | |
219 | res = eapol_sm_get_key(sm->eapol, sm->pmk, pmk_len); | |
6fc6879b | 220 | if (res) { |
207976f0 JM |
221 | if (pmk_len == PMK_LEN) { |
222 | /* | |
223 | * EAP-LEAP is an exception from other EAP | |
224 | * methods: it uses only 16-byte PMK. | |
225 | */ | |
226 | res = eapol_sm_get_key(sm->eapol, sm->pmk, 16); | |
227 | pmk_len = 16; | |
228 | } | |
6fc6879b JM |
229 | } else { |
230 | #ifdef CONFIG_IEEE80211R | |
231 | u8 buf[2 * PMK_LEN]; | |
232 | if (eapol_sm_get_key(sm->eapol, buf, 2 * PMK_LEN) == 0) | |
233 | { | |
234 | os_memcpy(sm->xxkey, buf + PMK_LEN, PMK_LEN); | |
235 | sm->xxkey_len = PMK_LEN; | |
236 | os_memset(buf, 0, sizeof(buf)); | |
237 | } | |
238 | #endif /* CONFIG_IEEE80211R */ | |
239 | } | |
240 | if (res == 0) { | |
a7f10d65 | 241 | struct rsn_pmksa_cache_entry *sa = NULL; |
6fc6879b JM |
242 | wpa_hexdump_key(MSG_DEBUG, "WPA: PMK from EAPOL state " |
243 | "machines", sm->pmk, pmk_len); | |
244 | sm->pmk_len = pmk_len; | |
b41f2684 | 245 | wpa_supplicant_key_mgmt_set_pmk(sm); |
715ed737 | 246 | if (sm->proto == WPA_PROTO_RSN && |
087a1f4e | 247 | !wpa_key_mgmt_suite_b(sm->key_mgmt) && |
715ed737 | 248 | !wpa_key_mgmt_ft(sm->key_mgmt)) { |
a7f10d65 | 249 | sa = pmksa_cache_add(sm->pmksa, |
70c93963 | 250 | sm->pmk, pmk_len, NULL, |
087a1f4e | 251 | NULL, 0, |
a7f10d65 JM |
252 | src_addr, sm->own_addr, |
253 | sm->network_ctx, | |
254 | sm->key_mgmt); | |
f5a51b58 | 255 | } |
6fc6879b | 256 | if (!sm->cur_pmksa && pmkid && |
96efeeb6 JM |
257 | pmksa_cache_get(sm->pmksa, src_addr, pmkid, NULL)) |
258 | { | |
f049052b BG |
259 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
260 | "RSN: the new PMK matches with the " | |
261 | "PMKID"); | |
6fc6879b | 262 | abort_cached = 0; |
bddc51e8 JM |
263 | } else if (sa && !sm->cur_pmksa && pmkid) { |
264 | /* | |
265 | * It looks like the authentication server | |
266 | * derived mismatching MSK. This should not | |
267 | * really happen, but bugs happen.. There is not | |
268 | * much we can do here without knowing what | |
269 | * exactly caused the server to misbehave. | |
270 | */ | |
62417667 | 271 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
bddc51e8 JM |
272 | "RSN: PMKID mismatch - authentication server may have derived different MSK?!"); |
273 | return -1; | |
6fc6879b | 274 | } |
a7f10d65 JM |
275 | |
276 | if (!sm->cur_pmksa) | |
277 | sm->cur_pmksa = sa; | |
6fc6879b | 278 | } else { |
0f057fb2 | 279 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
6fc6879b | 280 | "WPA: Failed to get master session key from " |
f049052b BG |
281 | "EAPOL state machines - key handshake " |
282 | "aborted"); | |
6fc6879b | 283 | if (sm->cur_pmksa) { |
f049052b BG |
284 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
285 | "RSN: Cancelled PMKSA caching " | |
286 | "attempt"); | |
6fc6879b JM |
287 | sm->cur_pmksa = NULL; |
288 | abort_cached = 1; | |
1ac2d4a9 | 289 | } else if (!abort_cached) { |
6fc6879b JM |
290 | return -1; |
291 | } | |
292 | } | |
293 | } | |
294 | ||
715ed737 | 295 | if (abort_cached && wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) && |
087a1f4e | 296 | !wpa_key_mgmt_suite_b(sm->key_mgmt) && |
a14896e8 JM |
297 | !wpa_key_mgmt_ft(sm->key_mgmt) && sm->key_mgmt != WPA_KEY_MGMT_OSEN) |
298 | { | |
6fc6879b JM |
299 | /* Send EAPOL-Start to trigger full EAP authentication. */ |
300 | u8 *buf; | |
301 | size_t buflen; | |
302 | ||
f049052b BG |
303 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
304 | "RSN: no PMKSA entry found - trigger " | |
305 | "full EAP authentication"); | |
6fc6879b JM |
306 | buf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_START, |
307 | NULL, 0, &buflen, NULL); | |
308 | if (buf) { | |
309 | wpa_sm_ether_send(sm, sm->bssid, ETH_P_EAPOL, | |
310 | buf, buflen); | |
311 | os_free(buf); | |
b4a1256d | 312 | return -2; |
6fc6879b JM |
313 | } |
314 | ||
315 | return -1; | |
316 | } | |
317 | ||
318 | return 0; | |
319 | } | |
320 | ||
321 | ||
322 | /** | |
323 | * wpa_supplicant_send_2_of_4 - Send message 2 of WPA/RSN 4-Way Handshake | |
324 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
325 | * @dst: Destination address for the frame | |
326 | * @key: Pointer to the EAPOL-Key frame header | |
327 | * @ver: Version bits from EAPOL-Key Key Info | |
328 | * @nonce: Nonce value for the EAPOL-Key frame | |
329 | * @wpa_ie: WPA/RSN IE | |
330 | * @wpa_ie_len: Length of the WPA/RSN IE | |
331 | * @ptk: PTK to use for keyed hash and encryption | |
c93b7e18 | 332 | * Returns: >= 0 on success, < 0 on failure |
6fc6879b JM |
333 | */ |
334 | int wpa_supplicant_send_2_of_4(struct wpa_sm *sm, const unsigned char *dst, | |
335 | const struct wpa_eapol_key *key, | |
336 | int ver, const u8 *nonce, | |
337 | const u8 *wpa_ie, size_t wpa_ie_len, | |
338 | struct wpa_ptk *ptk) | |
339 | { | |
5e3b5197 | 340 | size_t mic_len, hdrlen, rlen; |
6fc6879b | 341 | struct wpa_eapol_key *reply; |
5e3b5197 | 342 | u8 *rbuf, *key_mic; |
26e23750 | 343 | u8 *rsn_ie_buf = NULL; |
4a26ccda | 344 | u16 key_info; |
6fc6879b JM |
345 | |
346 | if (wpa_ie == NULL) { | |
f049052b BG |
347 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No wpa_ie set - " |
348 | "cannot generate msg 2/4"); | |
6fc6879b JM |
349 | return -1; |
350 | } | |
351 | ||
26e23750 JM |
352 | #ifdef CONFIG_IEEE80211R |
353 | if (wpa_key_mgmt_ft(sm->key_mgmt)) { | |
354 | int res; | |
355 | ||
55046414 JM |
356 | /* |
357 | * Add PMKR1Name into RSN IE (PMKID-List) and add MDIE and | |
358 | * FTIE from (Re)Association Response. | |
359 | */ | |
360 | rsn_ie_buf = os_malloc(wpa_ie_len + 2 + 2 + PMKID_LEN + | |
361 | sm->assoc_resp_ies_len); | |
26e23750 JM |
362 | if (rsn_ie_buf == NULL) |
363 | return -1; | |
364 | os_memcpy(rsn_ie_buf, wpa_ie, wpa_ie_len); | |
59e78c24 | 365 | res = wpa_insert_pmkid(rsn_ie_buf, &wpa_ie_len, |
26e23750 JM |
366 | sm->pmk_r1_name); |
367 | if (res < 0) { | |
368 | os_free(rsn_ie_buf); | |
369 | return -1; | |
370 | } | |
55046414 JM |
371 | |
372 | if (sm->assoc_resp_ies) { | |
373 | os_memcpy(rsn_ie_buf + wpa_ie_len, sm->assoc_resp_ies, | |
374 | sm->assoc_resp_ies_len); | |
375 | wpa_ie_len += sm->assoc_resp_ies_len; | |
376 | } | |
26e23750 JM |
377 | |
378 | wpa_ie = rsn_ie_buf; | |
26e23750 JM |
379 | } |
380 | #endif /* CONFIG_IEEE80211R */ | |
381 | ||
6fc6879b JM |
382 | wpa_hexdump(MSG_DEBUG, "WPA: WPA IE for msg 2/4", wpa_ie, wpa_ie_len); |
383 | ||
5e3b5197 | 384 | mic_len = wpa_mic_len(sm->key_mgmt); |
6d014ffc | 385 | hdrlen = sizeof(*reply) + mic_len + 2; |
6fc6879b | 386 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, |
5e3b5197 | 387 | NULL, hdrlen + wpa_ie_len, |
6fc6879b | 388 | &rlen, (void *) &reply); |
26e23750 JM |
389 | if (rbuf == NULL) { |
390 | os_free(rsn_ie_buf); | |
6fc6879b | 391 | return -1; |
26e23750 | 392 | } |
6fc6879b | 393 | |
a14896e8 JM |
394 | reply->type = (sm->proto == WPA_PROTO_RSN || |
395 | sm->proto == WPA_PROTO_OSEN) ? | |
6fc6879b | 396 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; |
4a26ccda JM |
397 | key_info = ver | WPA_KEY_INFO_KEY_TYPE; |
398 | if (mic_len) | |
399 | key_info |= WPA_KEY_INFO_MIC; | |
400 | WPA_PUT_BE16(reply->key_info, key_info); | |
a14896e8 | 401 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) |
6fc6879b JM |
402 | WPA_PUT_BE16(reply->key_length, 0); |
403 | else | |
404 | os_memcpy(reply->key_length, key->key_length, 2); | |
405 | os_memcpy(reply->replay_counter, key->replay_counter, | |
406 | WPA_REPLAY_COUNTER_LEN); | |
bc8318ac JM |
407 | wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter", reply->replay_counter, |
408 | WPA_REPLAY_COUNTER_LEN); | |
6fc6879b | 409 | |
6d014ffc JM |
410 | key_mic = (u8 *) (reply + 1); |
411 | WPA_PUT_BE16(key_mic + mic_len, wpa_ie_len); /* Key Data Length */ | |
412 | os_memcpy(key_mic + mic_len + 2, wpa_ie, wpa_ie_len); /* Key Data */ | |
26e23750 | 413 | os_free(rsn_ie_buf); |
6fc6879b JM |
414 | |
415 | os_memcpy(reply->key_nonce, nonce, WPA_NONCE_LEN); | |
416 | ||
f049052b | 417 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/4"); |
c93b7e18 AA |
418 | return wpa_eapol_key_send(sm, ptk->kck, ptk->kck_len, ver, dst, |
419 | ETH_P_EAPOL, rbuf, rlen, key_mic); | |
6fc6879b JM |
420 | } |
421 | ||
422 | ||
423 | static int wpa_derive_ptk(struct wpa_sm *sm, const unsigned char *src_addr, | |
98cd3d1c | 424 | const struct wpa_eapol_key *key, struct wpa_ptk *ptk) |
6fc6879b JM |
425 | { |
426 | #ifdef CONFIG_IEEE80211R | |
56586197 | 427 | if (wpa_key_mgmt_ft(sm->key_mgmt)) |
98cd3d1c | 428 | return wpa_derive_ptk_ft(sm, src_addr, key, ptk); |
6fc6879b JM |
429 | #endif /* CONFIG_IEEE80211R */ |
430 | ||
98cd3d1c JM |
431 | return wpa_pmk_to_ptk(sm->pmk, sm->pmk_len, "Pairwise key expansion", |
432 | sm->own_addr, sm->bssid, sm->snonce, | |
433 | key->key_nonce, ptk, sm->key_mgmt, | |
434 | sm->pairwise_cipher); | |
6fc6879b JM |
435 | } |
436 | ||
437 | ||
438 | static void wpa_supplicant_process_1_of_4(struct wpa_sm *sm, | |
439 | const unsigned char *src_addr, | |
440 | const struct wpa_eapol_key *key, | |
e6270129 JM |
441 | u16 ver, const u8 *key_data, |
442 | size_t key_data_len) | |
6fc6879b JM |
443 | { |
444 | struct wpa_eapol_ie_parse ie; | |
445 | struct wpa_ptk *ptk; | |
b4a1256d | 446 | int res; |
25ef8529 JM |
447 | u8 *kde, *kde_buf = NULL; |
448 | size_t kde_len; | |
6fc6879b JM |
449 | |
450 | if (wpa_sm_get_network_ctx(sm) == NULL) { | |
f049052b BG |
451 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No SSID info " |
452 | "found (msg 1 of 4)"); | |
6fc6879b JM |
453 | return; |
454 | } | |
455 | ||
456 | wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE); | |
f049052b BG |
457 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of 4-Way " |
458 | "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver); | |
6fc6879b JM |
459 | |
460 | os_memset(&ie, 0, sizeof(ie)); | |
461 | ||
a14896e8 | 462 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { |
6fc6879b | 463 | /* RSN: msg 1/4 should contain PMKID for the selected PMK */ |
e6270129 JM |
464 | wpa_hexdump(MSG_DEBUG, "RSN: msg 1/4 key data", |
465 | key_data, key_data_len); | |
466 | if (wpa_supplicant_parse_ies(key_data, key_data_len, &ie) < 0) | |
d627a939 | 467 | goto failed; |
6fc6879b JM |
468 | if (ie.pmkid) { |
469 | wpa_hexdump(MSG_DEBUG, "RSN: PMKID from " | |
470 | "Authenticator", ie.pmkid, PMKID_LEN); | |
471 | } | |
472 | } | |
6fc6879b | 473 | |
b4a1256d JM |
474 | res = wpa_supplicant_get_pmk(sm, src_addr, ie.pmkid); |
475 | if (res == -2) { | |
f049052b BG |
476 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: Do not reply to " |
477 | "msg 1/4 - requesting full EAP authentication"); | |
b4a1256d JM |
478 | return; |
479 | } | |
480 | if (res) | |
83935317 | 481 | goto failed; |
6fc6879b JM |
482 | |
483 | if (sm->renew_snonce) { | |
3642c431 | 484 | if (random_get_bytes(sm->snonce, WPA_NONCE_LEN)) { |
0f057fb2 | 485 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
6fc6879b | 486 | "WPA: Failed to get random data for SNonce"); |
83935317 | 487 | goto failed; |
6fc6879b JM |
488 | } |
489 | sm->renew_snonce = 0; | |
490 | wpa_hexdump(MSG_DEBUG, "WPA: Renewed SNonce", | |
491 | sm->snonce, WPA_NONCE_LEN); | |
492 | } | |
493 | ||
494 | /* Calculate PTK which will be stored as a temporary PTK until it has | |
495 | * been verified when processing message 3/4. */ | |
496 | ptk = &sm->tptk; | |
497 | wpa_derive_ptk(sm, src_addr, key, ptk); | |
3b9c5176 | 498 | if (sm->pairwise_cipher == WPA_CIPHER_TKIP) { |
d2c33b91 | 499 | u8 buf[8]; |
3b9c5176 | 500 | /* Supplicant: swap tx/rx Mic keys */ |
98cd3d1c JM |
501 | os_memcpy(buf, &ptk->tk[16], 8); |
502 | os_memcpy(&ptk->tk[16], &ptk->tk[24], 8); | |
503 | os_memcpy(&ptk->tk[24], buf, 8); | |
d2c33b91 | 504 | os_memset(buf, 0, sizeof(buf)); |
3b9c5176 | 505 | } |
6fc6879b | 506 | sm->tptk_set = 1; |
ad00d64e | 507 | sm->tk_to_set = 1; |
6fc6879b | 508 | |
25ef8529 JM |
509 | kde = sm->assoc_wpa_ie; |
510 | kde_len = sm->assoc_wpa_ie_len; | |
511 | ||
512 | #ifdef CONFIG_P2P | |
513 | if (sm->p2p) { | |
514 | kde_buf = os_malloc(kde_len + 2 + RSN_SELECTOR_LEN + 1); | |
515 | if (kde_buf) { | |
516 | u8 *pos; | |
517 | wpa_printf(MSG_DEBUG, "P2P: Add IP Address Request KDE " | |
518 | "into EAPOL-Key 2/4"); | |
519 | os_memcpy(kde_buf, kde, kde_len); | |
520 | kde = kde_buf; | |
521 | pos = kde + kde_len; | |
522 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
523 | *pos++ = RSN_SELECTOR_LEN + 1; | |
524 | RSN_SELECTOR_PUT(pos, WFA_KEY_DATA_IP_ADDR_REQ); | |
525 | pos += RSN_SELECTOR_LEN; | |
526 | *pos++ = 0x01; | |
527 | kde_len = pos - kde; | |
528 | } | |
529 | } | |
530 | #endif /* CONFIG_P2P */ | |
531 | ||
6fc6879b | 532 | if (wpa_supplicant_send_2_of_4(sm, sm->bssid, key, ver, sm->snonce, |
c93b7e18 | 533 | kde, kde_len, ptk) < 0) |
83935317 | 534 | goto failed; |
6fc6879b | 535 | |
25ef8529 | 536 | os_free(kde_buf); |
6fc6879b | 537 | os_memcpy(sm->anonce, key->key_nonce, WPA_NONCE_LEN); |
83935317 JM |
538 | return; |
539 | ||
540 | failed: | |
25ef8529 | 541 | os_free(kde_buf); |
83935317 | 542 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); |
6fc6879b JM |
543 | } |
544 | ||
545 | ||
546 | static void wpa_sm_start_preauth(void *eloop_ctx, void *timeout_ctx) | |
547 | { | |
548 | struct wpa_sm *sm = eloop_ctx; | |
549 | rsn_preauth_candidate_process(sm); | |
550 | } | |
551 | ||
552 | ||
553 | static void wpa_supplicant_key_neg_complete(struct wpa_sm *sm, | |
554 | const u8 *addr, int secure) | |
555 | { | |
0f057fb2 JM |
556 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
557 | "WPA: Key negotiation completed with " | |
6fc6879b JM |
558 | MACSTR " [PTK=%s GTK=%s]", MAC2STR(addr), |
559 | wpa_cipher_txt(sm->pairwise_cipher), | |
560 | wpa_cipher_txt(sm->group_cipher)); | |
6fc6879b JM |
561 | wpa_sm_cancel_auth_timeout(sm); |
562 | wpa_sm_set_state(sm, WPA_COMPLETED); | |
563 | ||
564 | if (secure) { | |
565 | wpa_sm_mlme_setprotection( | |
566 | sm, addr, MLME_SETPROTECTION_PROTECT_TYPE_RX_TX, | |
567 | MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); | |
568 | eapol_sm_notify_portValid(sm->eapol, TRUE); | |
56586197 | 569 | if (wpa_key_mgmt_wpa_psk(sm->key_mgmt)) |
6fc6879b JM |
570 | eapol_sm_notify_eap_success(sm->eapol, TRUE); |
571 | /* | |
572 | * Start preauthentication after a short wait to avoid a | |
573 | * possible race condition between the data receive and key | |
574 | * configuration after the 4-Way Handshake. This increases the | |
ffbf1eaa | 575 | * likelihood of the first preauth EAPOL-Start frame getting to |
6fc6879b JM |
576 | * the target AP. |
577 | */ | |
578 | eloop_register_timeout(1, 0, wpa_sm_start_preauth, sm, NULL); | |
579 | } | |
580 | ||
581 | if (sm->cur_pmksa && sm->cur_pmksa->opportunistic) { | |
f049052b BG |
582 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
583 | "RSN: Authenticator accepted " | |
584 | "opportunistic PMKSA entry - marking it valid"); | |
6fc6879b JM |
585 | sm->cur_pmksa->opportunistic = 0; |
586 | } | |
587 | ||
588 | #ifdef CONFIG_IEEE80211R | |
56586197 | 589 | if (wpa_key_mgmt_ft(sm->key_mgmt)) { |
6fc6879b | 590 | /* Prepare for the next transition */ |
76b7981d | 591 | wpa_ft_prepare_auth_request(sm, NULL); |
6fc6879b JM |
592 | } |
593 | #endif /* CONFIG_IEEE80211R */ | |
594 | } | |
595 | ||
596 | ||
581a8cde JM |
597 | static void wpa_sm_rekey_ptk(void *eloop_ctx, void *timeout_ctx) |
598 | { | |
599 | struct wpa_sm *sm = eloop_ctx; | |
f049052b | 600 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Request PTK rekeying"); |
581a8cde JM |
601 | wpa_sm_key_request(sm, 0, 1); |
602 | } | |
603 | ||
604 | ||
6fc6879b JM |
605 | static int wpa_supplicant_install_ptk(struct wpa_sm *sm, |
606 | const struct wpa_eapol_key *key) | |
607 | { | |
608 | int keylen, rsclen; | |
71934751 | 609 | enum wpa_alg alg; |
6fc6879b | 610 | const u8 *key_rsc; |
6fc6879b | 611 | |
ad00d64e JM |
612 | if (!sm->tk_to_set) { |
613 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
614 | "WPA: Do not re-install same PTK to the driver"); | |
615 | return 0; | |
616 | } | |
617 | ||
f049052b BG |
618 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
619 | "WPA: Installing PTK to the driver"); | |
6fc6879b | 620 | |
c3550295 | 621 | if (sm->pairwise_cipher == WPA_CIPHER_NONE) { |
f049052b BG |
622 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Pairwise Cipher " |
623 | "Suite: NONE - do not use pairwise keys"); | |
6fc6879b | 624 | return 0; |
c3550295 JM |
625 | } |
626 | ||
627 | if (!wpa_cipher_valid_pairwise(sm->pairwise_cipher)) { | |
f049052b BG |
628 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
629 | "WPA: Unsupported pairwise cipher %d", | |
630 | sm->pairwise_cipher); | |
6fc6879b JM |
631 | return -1; |
632 | } | |
633 | ||
c3550295 JM |
634 | alg = wpa_cipher_to_alg(sm->pairwise_cipher); |
635 | keylen = wpa_cipher_key_len(sm->pairwise_cipher); | |
636 | rsclen = wpa_cipher_rsc_len(sm->pairwise_cipher); | |
637 | ||
a14896e8 | 638 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { |
6fc6879b JM |
639 | key_rsc = null_rsc; |
640 | } else { | |
641 | key_rsc = key->key_rsc; | |
642 | wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, rsclen); | |
643 | } | |
644 | ||
645 | if (wpa_sm_set_key(sm, alg, sm->bssid, 0, 1, key_rsc, rsclen, | |
98cd3d1c | 646 | sm->ptk.tk, keylen) < 0) { |
f049052b BG |
647 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
648 | "WPA: Failed to set PTK to the " | |
649 | "driver (alg=%d keylen=%d bssid=" MACSTR ")", | |
650 | alg, keylen, MAC2STR(sm->bssid)); | |
6fc6879b JM |
651 | return -1; |
652 | } | |
581a8cde | 653 | |
7d711541 | 654 | /* TK is not needed anymore in supplicant */ |
98cd3d1c | 655 | os_memset(sm->ptk.tk, 0, WPA_TK_MAX_LEN); |
ad00d64e | 656 | sm->tk_to_set = 0; |
7d711541 | 657 | |
581a8cde JM |
658 | if (sm->wpa_ptk_rekey) { |
659 | eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); | |
660 | eloop_register_timeout(sm->wpa_ptk_rekey, 0, wpa_sm_rekey_ptk, | |
661 | sm, NULL); | |
662 | } | |
663 | ||
6fc6879b JM |
664 | return 0; |
665 | } | |
666 | ||
667 | ||
f049052b BG |
668 | static int wpa_supplicant_check_group_cipher(struct wpa_sm *sm, |
669 | int group_cipher, | |
6fc6879b | 670 | int keylen, int maxkeylen, |
71934751 JM |
671 | int *key_rsc_len, |
672 | enum wpa_alg *alg) | |
6fc6879b | 673 | { |
c3550295 | 674 | int klen; |
6fc6879b | 675 | |
c3550295 JM |
676 | *alg = wpa_cipher_to_alg(group_cipher); |
677 | if (*alg == WPA_ALG_NONE) { | |
f049052b BG |
678 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
679 | "WPA: Unsupported Group Cipher %d", | |
680 | group_cipher); | |
6fc6879b JM |
681 | return -1; |
682 | } | |
c3550295 | 683 | *key_rsc_len = wpa_cipher_rsc_len(group_cipher); |
6fc6879b | 684 | |
c3550295 JM |
685 | klen = wpa_cipher_key_len(group_cipher); |
686 | if (keylen != klen || maxkeylen < klen) { | |
f049052b BG |
687 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
688 | "WPA: Unsupported %s Group Cipher key length %d (%d)", | |
689 | wpa_cipher_txt(group_cipher), keylen, maxkeylen); | |
c3550295 | 690 | return -1; |
6fc6879b | 691 | } |
c3550295 | 692 | return 0; |
6fc6879b JM |
693 | } |
694 | ||
695 | ||
696 | struct wpa_gtk_data { | |
71934751 | 697 | enum wpa_alg alg; |
6fc6879b JM |
698 | int tx, key_rsc_len, keyidx; |
699 | u8 gtk[32]; | |
700 | int gtk_len; | |
701 | }; | |
702 | ||
703 | ||
704 | static int wpa_supplicant_install_gtk(struct wpa_sm *sm, | |
705 | const struct wpa_gtk_data *gd, | |
706 | const u8 *key_rsc) | |
707 | { | |
708 | const u8 *_gtk = gd->gtk; | |
709 | u8 gtk_buf[32]; | |
710 | ||
711 | wpa_hexdump_key(MSG_DEBUG, "WPA: Group Key", gd->gtk, gd->gtk_len); | |
f049052b BG |
712 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
713 | "WPA: Installing GTK to the driver (keyidx=%d tx=%d len=%d)", | |
714 | gd->keyidx, gd->tx, gd->gtk_len); | |
6fc6879b JM |
715 | wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, gd->key_rsc_len); |
716 | if (sm->group_cipher == WPA_CIPHER_TKIP) { | |
717 | /* Swap Tx/Rx keys for Michael MIC */ | |
718 | os_memcpy(gtk_buf, gd->gtk, 16); | |
719 | os_memcpy(gtk_buf + 16, gd->gtk + 24, 8); | |
720 | os_memcpy(gtk_buf + 24, gd->gtk + 16, 8); | |
721 | _gtk = gtk_buf; | |
722 | } | |
723 | if (sm->pairwise_cipher == WPA_CIPHER_NONE) { | |
0382097e | 724 | if (wpa_sm_set_key(sm, gd->alg, NULL, |
6fc6879b JM |
725 | gd->keyidx, 1, key_rsc, gd->key_rsc_len, |
726 | _gtk, gd->gtk_len) < 0) { | |
f049052b BG |
727 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
728 | "WPA: Failed to set GTK to the driver " | |
729 | "(Group only)"); | |
d2c33b91 | 730 | os_memset(gtk_buf, 0, sizeof(gtk_buf)); |
6fc6879b JM |
731 | return -1; |
732 | } | |
0382097e | 733 | } else if (wpa_sm_set_key(sm, gd->alg, broadcast_ether_addr, |
6fc6879b JM |
734 | gd->keyidx, gd->tx, key_rsc, gd->key_rsc_len, |
735 | _gtk, gd->gtk_len) < 0) { | |
f049052b BG |
736 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
737 | "WPA: Failed to set GTK to " | |
738 | "the driver (alg=%d keylen=%d keyidx=%d)", | |
739 | gd->alg, gd->gtk_len, gd->keyidx); | |
d2c33b91 | 740 | os_memset(gtk_buf, 0, sizeof(gtk_buf)); |
6fc6879b JM |
741 | return -1; |
742 | } | |
d2c33b91 | 743 | os_memset(gtk_buf, 0, sizeof(gtk_buf)); |
6fc6879b JM |
744 | |
745 | return 0; | |
746 | } | |
747 | ||
748 | ||
749 | static int wpa_supplicant_gtk_tx_bit_workaround(const struct wpa_sm *sm, | |
750 | int tx) | |
751 | { | |
752 | if (tx && sm->pairwise_cipher != WPA_CIPHER_NONE) { | |
753 | /* Ignore Tx bit for GTK if a pairwise key is used. One AP | |
754 | * seemed to set this bit (incorrectly, since Tx is only when | |
755 | * doing Group Key only APs) and without this workaround, the | |
756 | * data connection does not work because wpa_supplicant | |
757 | * configured non-zero keyidx to be used for unicast. */ | |
f049052b BG |
758 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
759 | "WPA: Tx bit set for GTK, but pairwise " | |
760 | "keys are used - ignore Tx bit"); | |
6fc6879b JM |
761 | return 0; |
762 | } | |
763 | return tx; | |
764 | } | |
765 | ||
766 | ||
73ed03f3 MS |
767 | static int wpa_supplicant_rsc_relaxation(const struct wpa_sm *sm, |
768 | const u8 *rsc) | |
769 | { | |
770 | int rsclen; | |
771 | ||
772 | if (!sm->wpa_rsc_relaxation) | |
773 | return 0; | |
774 | ||
775 | rsclen = wpa_cipher_rsc_len(sm->group_cipher); | |
776 | ||
777 | /* | |
778 | * Try to detect RSC (endian) corruption issue where the AP sends | |
779 | * the RSC bytes in EAPOL-Key message in the wrong order, both if | |
780 | * it's actually a 6-byte field (as it should be) and if it treats | |
781 | * it as an 8-byte field. | |
782 | * An AP model known to have this bug is the Sapido RB-1632. | |
783 | */ | |
784 | if (rsclen == 6 && ((rsc[5] && !rsc[0]) || rsc[6] || rsc[7])) { | |
785 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, | |
786 | "RSC %02x%02x%02x%02x%02x%02x%02x%02x is likely bogus, using 0", | |
787 | rsc[0], rsc[1], rsc[2], rsc[3], | |
788 | rsc[4], rsc[5], rsc[6], rsc[7]); | |
789 | ||
790 | return 1; | |
791 | } | |
792 | ||
793 | return 0; | |
794 | } | |
795 | ||
796 | ||
6fc6879b JM |
797 | static int wpa_supplicant_pairwise_gtk(struct wpa_sm *sm, |
798 | const struct wpa_eapol_key *key, | |
799 | const u8 *gtk, size_t gtk_len, | |
800 | int key_info) | |
801 | { | |
6fc6879b | 802 | struct wpa_gtk_data gd; |
73ed03f3 | 803 | const u8 *key_rsc; |
6fc6879b JM |
804 | |
805 | /* | |
806 | * IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames - Figure 43x | |
807 | * GTK KDE format: | |
808 | * KeyID[bits 0-1], Tx [bit 2], Reserved [bits 3-7] | |
809 | * Reserved [bits 0-7] | |
810 | * GTK | |
811 | */ | |
812 | ||
813 | os_memset(&gd, 0, sizeof(gd)); | |
814 | wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in pairwise handshake", | |
815 | gtk, gtk_len); | |
816 | ||
817 | if (gtk_len < 2 || gtk_len - 2 > sizeof(gd.gtk)) | |
818 | return -1; | |
819 | ||
820 | gd.keyidx = gtk[0] & 0x3; | |
821 | gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm, | |
822 | !!(gtk[0] & BIT(2))); | |
823 | gtk += 2; | |
824 | gtk_len -= 2; | |
825 | ||
826 | os_memcpy(gd.gtk, gtk, gtk_len); | |
827 | gd.gtk_len = gtk_len; | |
828 | ||
73ed03f3 MS |
829 | key_rsc = key->key_rsc; |
830 | if (wpa_supplicant_rsc_relaxation(sm, key->key_rsc)) | |
831 | key_rsc = null_rsc; | |
832 | ||
dff1e285 JM |
833 | if (sm->group_cipher != WPA_CIPHER_GTK_NOT_USED && |
834 | (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, | |
835 | gtk_len, gtk_len, | |
836 | &gd.key_rsc_len, &gd.alg) || | |
73ed03f3 | 837 | wpa_supplicant_install_gtk(sm, &gd, key_rsc))) { |
f049052b BG |
838 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
839 | "RSN: Failed to install GTK"); | |
d2c33b91 | 840 | os_memset(&gd, 0, sizeof(gd)); |
6fc6879b JM |
841 | return -1; |
842 | } | |
d2c33b91 | 843 | os_memset(&gd, 0, sizeof(gd)); |
6fc6879b JM |
844 | |
845 | wpa_supplicant_key_neg_complete(sm, sm->bssid, | |
846 | key_info & WPA_KEY_INFO_SECURE); | |
847 | return 0; | |
6fc6879b JM |
848 | } |
849 | ||
850 | ||
851 | static int ieee80211w_set_keys(struct wpa_sm *sm, | |
852 | struct wpa_eapol_ie_parse *ie) | |
853 | { | |
854 | #ifdef CONFIG_IEEE80211W | |
8dd9f9cd | 855 | if (!wpa_cipher_valid_mgmt_group(sm->mgmt_group_cipher)) |
6fc6879b JM |
856 | return 0; |
857 | ||
858 | if (ie->igtk) { | |
8dd9f9cd | 859 | size_t len; |
6fc6879b JM |
860 | const struct wpa_igtk_kde *igtk; |
861 | u16 keyidx; | |
8dd9f9cd JM |
862 | len = wpa_cipher_key_len(sm->mgmt_group_cipher); |
863 | if (ie->igtk_len != WPA_IGTK_KDE_PREFIX_LEN + len) | |
6fc6879b JM |
864 | return -1; |
865 | igtk = (const struct wpa_igtk_kde *) ie->igtk; | |
866 | keyidx = WPA_GET_LE16(igtk->keyid); | |
f049052b BG |
867 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: IGTK keyid %d " |
868 | "pn %02x%02x%02x%02x%02x%02x", | |
869 | keyidx, MAC2STR(igtk->pn)); | |
6fc6879b | 870 | wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK", |
8dd9f9cd | 871 | igtk->igtk, len); |
6fc6879b | 872 | if (keyidx > 4095) { |
f049052b BG |
873 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
874 | "WPA: Invalid IGTK KeyID %d", keyidx); | |
6fc6879b JM |
875 | return -1; |
876 | } | |
8dd9f9cd JM |
877 | if (wpa_sm_set_key(sm, wpa_cipher_to_alg(sm->mgmt_group_cipher), |
878 | broadcast_ether_addr, | |
6fc6879b | 879 | keyidx, 0, igtk->pn, sizeof(igtk->pn), |
8dd9f9cd | 880 | igtk->igtk, len) < 0) { |
f049052b BG |
881 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
882 | "WPA: Failed to configure IGTK to the driver"); | |
6fc6879b JM |
883 | return -1; |
884 | } | |
885 | } | |
886 | ||
887 | return 0; | |
888 | #else /* CONFIG_IEEE80211W */ | |
889 | return 0; | |
890 | #endif /* CONFIG_IEEE80211W */ | |
891 | } | |
892 | ||
893 | ||
894 | static void wpa_report_ie_mismatch(struct wpa_sm *sm, | |
895 | const char *reason, const u8 *src_addr, | |
896 | const u8 *wpa_ie, size_t wpa_ie_len, | |
897 | const u8 *rsn_ie, size_t rsn_ie_len) | |
898 | { | |
0f057fb2 | 899 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: %s (src=" MACSTR ")", |
6fc6879b JM |
900 | reason, MAC2STR(src_addr)); |
901 | ||
902 | if (sm->ap_wpa_ie) { | |
903 | wpa_hexdump(MSG_INFO, "WPA: WPA IE in Beacon/ProbeResp", | |
904 | sm->ap_wpa_ie, sm->ap_wpa_ie_len); | |
905 | } | |
906 | if (wpa_ie) { | |
907 | if (!sm->ap_wpa_ie) { | |
f049052b BG |
908 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
909 | "WPA: No WPA IE in Beacon/ProbeResp"); | |
6fc6879b JM |
910 | } |
911 | wpa_hexdump(MSG_INFO, "WPA: WPA IE in 3/4 msg", | |
912 | wpa_ie, wpa_ie_len); | |
913 | } | |
914 | ||
915 | if (sm->ap_rsn_ie) { | |
916 | wpa_hexdump(MSG_INFO, "WPA: RSN IE in Beacon/ProbeResp", | |
917 | sm->ap_rsn_ie, sm->ap_rsn_ie_len); | |
918 | } | |
919 | if (rsn_ie) { | |
920 | if (!sm->ap_rsn_ie) { | |
f049052b BG |
921 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
922 | "WPA: No RSN IE in Beacon/ProbeResp"); | |
6fc6879b JM |
923 | } |
924 | wpa_hexdump(MSG_INFO, "WPA: RSN IE in 3/4 msg", | |
925 | rsn_ie, rsn_ie_len); | |
926 | } | |
927 | ||
3da372fa | 928 | wpa_sm_deauthenticate(sm, WLAN_REASON_IE_IN_4WAY_DIFFERS); |
6fc6879b JM |
929 | } |
930 | ||
931 | ||
5af8187e JM |
932 | #ifdef CONFIG_IEEE80211R |
933 | ||
934 | static int ft_validate_mdie(struct wpa_sm *sm, | |
935 | const unsigned char *src_addr, | |
3b4f6dac JM |
936 | struct wpa_eapol_ie_parse *ie, |
937 | const u8 *assoc_resp_mdie) | |
5af8187e JM |
938 | { |
939 | struct rsn_mdie *mdie; | |
940 | ||
5af8187e JM |
941 | mdie = (struct rsn_mdie *) (ie->mdie + 2); |
942 | if (ie->mdie == NULL || ie->mdie_len < 2 + sizeof(*mdie) || | |
943 | os_memcmp(mdie->mobility_domain, sm->mobility_domain, | |
944 | MOBILITY_DOMAIN_ID_LEN) != 0) { | |
f049052b BG |
945 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE in msg 3/4 did " |
946 | "not match with the current mobility domain"); | |
5af8187e JM |
947 | return -1; |
948 | } | |
949 | ||
3b4f6dac JM |
950 | if (assoc_resp_mdie && |
951 | (assoc_resp_mdie[1] != ie->mdie[1] || | |
952 | os_memcmp(assoc_resp_mdie, ie->mdie, 2 + ie->mdie[1]) != 0)) { | |
f049052b | 953 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE mismatch"); |
3b4f6dac JM |
954 | wpa_hexdump(MSG_DEBUG, "FT: MDIE in EAPOL-Key msg 3/4", |
955 | ie->mdie, 2 + ie->mdie[1]); | |
956 | wpa_hexdump(MSG_DEBUG, "FT: MDIE in (Re)Association Response", | |
957 | assoc_resp_mdie, 2 + assoc_resp_mdie[1]); | |
958 | return -1; | |
959 | } | |
960 | ||
961 | return 0; | |
962 | } | |
963 | ||
964 | ||
965 | static int ft_validate_ftie(struct wpa_sm *sm, | |
966 | const unsigned char *src_addr, | |
967 | struct wpa_eapol_ie_parse *ie, | |
968 | const u8 *assoc_resp_ftie) | |
969 | { | |
970 | if (ie->ftie == NULL) { | |
f049052b BG |
971 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
972 | "FT: No FTIE in EAPOL-Key msg 3/4"); | |
3b4f6dac JM |
973 | return -1; |
974 | } | |
975 | ||
976 | if (assoc_resp_ftie == NULL) | |
977 | return 0; | |
978 | ||
979 | if (assoc_resp_ftie[1] != ie->ftie[1] || | |
980 | os_memcmp(assoc_resp_ftie, ie->ftie, 2 + ie->ftie[1]) != 0) { | |
f049052b | 981 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: FTIE mismatch"); |
3b4f6dac JM |
982 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 3/4", |
983 | ie->ftie, 2 + ie->ftie[1]); | |
984 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)Association Response", | |
985 | assoc_resp_ftie, 2 + assoc_resp_ftie[1]); | |
986 | return -1; | |
987 | } | |
988 | ||
5af8187e JM |
989 | return 0; |
990 | } | |
991 | ||
992 | ||
993 | static int ft_validate_rsnie(struct wpa_sm *sm, | |
994 | const unsigned char *src_addr, | |
995 | struct wpa_eapol_ie_parse *ie) | |
996 | { | |
997 | struct wpa_ie_data rsn; | |
998 | ||
999 | if (!ie->rsn_ie) | |
1000 | return 0; | |
1001 | ||
1002 | /* | |
1003 | * Verify that PMKR1Name from EAPOL-Key message 3/4 | |
1004 | * matches with the value we derived. | |
1005 | */ | |
1006 | if (wpa_parse_wpa_ie_rsn(ie->rsn_ie, ie->rsn_ie_len, &rsn) < 0 || | |
1007 | rsn.num_pmkid != 1 || rsn.pmkid == NULL) { | |
f049052b BG |
1008 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: No PMKR1Name in " |
1009 | "FT 4-way handshake message 3/4"); | |
5af8187e JM |
1010 | return -1; |
1011 | } | |
1012 | ||
0d15b69f JM |
1013 | if (os_memcmp_const(rsn.pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0) |
1014 | { | |
f049052b BG |
1015 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1016 | "FT: PMKR1Name mismatch in " | |
1017 | "FT 4-way handshake message 3/4"); | |
5af8187e JM |
1018 | wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Authenticator", |
1019 | rsn.pmkid, WPA_PMK_NAME_LEN); | |
1020 | wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name", | |
1021 | sm->pmk_r1_name, WPA_PMK_NAME_LEN); | |
1022 | return -1; | |
1023 | } | |
1024 | ||
1025 | return 0; | |
1026 | } | |
1027 | ||
1028 | ||
1029 | static int wpa_supplicant_validate_ie_ft(struct wpa_sm *sm, | |
1030 | const unsigned char *src_addr, | |
1031 | struct wpa_eapol_ie_parse *ie) | |
1032 | { | |
3b4f6dac JM |
1033 | const u8 *pos, *end, *mdie = NULL, *ftie = NULL; |
1034 | ||
1035 | if (sm->assoc_resp_ies) { | |
1036 | pos = sm->assoc_resp_ies; | |
1037 | end = pos + sm->assoc_resp_ies_len; | |
2461724c JM |
1038 | while (end - pos > 2) { |
1039 | if (2 + pos[1] > end - pos) | |
3b4f6dac JM |
1040 | break; |
1041 | switch (*pos) { | |
1042 | case WLAN_EID_MOBILITY_DOMAIN: | |
1043 | mdie = pos; | |
1044 | break; | |
1045 | case WLAN_EID_FAST_BSS_TRANSITION: | |
1046 | ftie = pos; | |
1047 | break; | |
1048 | } | |
1049 | pos += 2 + pos[1]; | |
1050 | } | |
1051 | } | |
1052 | ||
1053 | if (ft_validate_mdie(sm, src_addr, ie, mdie) < 0 || | |
1054 | ft_validate_ftie(sm, src_addr, ie, ftie) < 0 || | |
5af8187e JM |
1055 | ft_validate_rsnie(sm, src_addr, ie) < 0) |
1056 | return -1; | |
1057 | ||
1058 | return 0; | |
1059 | } | |
1060 | ||
1061 | #endif /* CONFIG_IEEE80211R */ | |
1062 | ||
1063 | ||
6fc6879b JM |
1064 | static int wpa_supplicant_validate_ie(struct wpa_sm *sm, |
1065 | const unsigned char *src_addr, | |
1066 | struct wpa_eapol_ie_parse *ie) | |
1067 | { | |
1068 | if (sm->ap_wpa_ie == NULL && sm->ap_rsn_ie == NULL) { | |
f049052b BG |
1069 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1070 | "WPA: No WPA/RSN IE for this AP known. " | |
1071 | "Trying to get from scan results"); | |
6fc6879b | 1072 | if (wpa_sm_get_beacon_ie(sm) < 0) { |
f049052b BG |
1073 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1074 | "WPA: Could not find AP from " | |
1075 | "the scan results"); | |
6fc6879b | 1076 | } else { |
f049052b BG |
1077 | wpa_msg(sm->ctx->msg_ctx, MSG_DEBUG, |
1078 | "WPA: Found the current AP from " | |
1079 | "updated scan results"); | |
6fc6879b JM |
1080 | } |
1081 | } | |
1082 | ||
1083 | if (ie->wpa_ie == NULL && ie->rsn_ie == NULL && | |
1084 | (sm->ap_wpa_ie || sm->ap_rsn_ie)) { | |
1085 | wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " | |
1086 | "with IE in Beacon/ProbeResp (no IE?)", | |
1087 | src_addr, ie->wpa_ie, ie->wpa_ie_len, | |
1088 | ie->rsn_ie, ie->rsn_ie_len); | |
1089 | return -1; | |
1090 | } | |
1091 | ||
1092 | if ((ie->wpa_ie && sm->ap_wpa_ie && | |
1093 | (ie->wpa_ie_len != sm->ap_wpa_ie_len || | |
1094 | os_memcmp(ie->wpa_ie, sm->ap_wpa_ie, ie->wpa_ie_len) != 0)) || | |
1095 | (ie->rsn_ie && sm->ap_rsn_ie && | |
26e23750 JM |
1096 | wpa_compare_rsn_ie(wpa_key_mgmt_ft(sm->key_mgmt), |
1097 | sm->ap_rsn_ie, sm->ap_rsn_ie_len, | |
1098 | ie->rsn_ie, ie->rsn_ie_len))) { | |
6fc6879b JM |
1099 | wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " |
1100 | "with IE in Beacon/ProbeResp", | |
1101 | src_addr, ie->wpa_ie, ie->wpa_ie_len, | |
1102 | ie->rsn_ie, ie->rsn_ie_len); | |
1103 | return -1; | |
1104 | } | |
1105 | ||
1106 | if (sm->proto == WPA_PROTO_WPA && | |
1107 | ie->rsn_ie && sm->ap_rsn_ie == NULL && sm->rsn_enabled) { | |
1108 | wpa_report_ie_mismatch(sm, "Possible downgrade attack " | |
1109 | "detected - RSN was enabled and RSN IE " | |
1110 | "was in msg 3/4, but not in " | |
1111 | "Beacon/ProbeResp", | |
1112 | src_addr, ie->wpa_ie, ie->wpa_ie_len, | |
1113 | ie->rsn_ie, ie->rsn_ie_len); | |
1114 | return -1; | |
1115 | } | |
1116 | ||
1117 | #ifdef CONFIG_IEEE80211R | |
5af8187e JM |
1118 | if (wpa_key_mgmt_ft(sm->key_mgmt) && |
1119 | wpa_supplicant_validate_ie_ft(sm, src_addr, ie) < 0) | |
1120 | return -1; | |
6fc6879b JM |
1121 | #endif /* CONFIG_IEEE80211R */ |
1122 | ||
1123 | return 0; | |
1124 | } | |
1125 | ||
1126 | ||
1127 | /** | |
1128 | * wpa_supplicant_send_4_of_4 - Send message 4 of WPA/RSN 4-Way Handshake | |
1129 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
1130 | * @dst: Destination address for the frame | |
1131 | * @key: Pointer to the EAPOL-Key frame header | |
1132 | * @ver: Version bits from EAPOL-Key Key Info | |
1133 | * @key_info: Key Info | |
6fc6879b | 1134 | * @ptk: PTK to use for keyed hash and encryption |
c93b7e18 | 1135 | * Returns: >= 0 on success, < 0 on failure |
6fc6879b JM |
1136 | */ |
1137 | int wpa_supplicant_send_4_of_4(struct wpa_sm *sm, const unsigned char *dst, | |
1138 | const struct wpa_eapol_key *key, | |
1139 | u16 ver, u16 key_info, | |
6fc6879b JM |
1140 | struct wpa_ptk *ptk) |
1141 | { | |
5e3b5197 | 1142 | size_t mic_len, hdrlen, rlen; |
6fc6879b | 1143 | struct wpa_eapol_key *reply; |
5e3b5197 | 1144 | u8 *rbuf, *key_mic; |
6fc6879b | 1145 | |
5e3b5197 | 1146 | mic_len = wpa_mic_len(sm->key_mgmt); |
6d014ffc | 1147 | hdrlen = sizeof(*reply) + mic_len + 2; |
6fc6879b | 1148 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, |
5e3b5197 | 1149 | hdrlen, &rlen, (void *) &reply); |
6fc6879b JM |
1150 | if (rbuf == NULL) |
1151 | return -1; | |
1152 | ||
a14896e8 JM |
1153 | reply->type = (sm->proto == WPA_PROTO_RSN || |
1154 | sm->proto == WPA_PROTO_OSEN) ? | |
6fc6879b JM |
1155 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; |
1156 | key_info &= WPA_KEY_INFO_SECURE; | |
4a26ccda JM |
1157 | key_info |= ver | WPA_KEY_INFO_KEY_TYPE; |
1158 | if (mic_len) | |
1159 | key_info |= WPA_KEY_INFO_MIC; | |
6fc6879b | 1160 | WPA_PUT_BE16(reply->key_info, key_info); |
a14896e8 | 1161 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) |
6fc6879b JM |
1162 | WPA_PUT_BE16(reply->key_length, 0); |
1163 | else | |
1164 | os_memcpy(reply->key_length, key->key_length, 2); | |
1165 | os_memcpy(reply->replay_counter, key->replay_counter, | |
1166 | WPA_REPLAY_COUNTER_LEN); | |
1167 | ||
6d014ffc JM |
1168 | key_mic = (u8 *) (reply + 1); |
1169 | WPA_PUT_BE16(key_mic + mic_len, 0); | |
6fc6879b | 1170 | |
f049052b | 1171 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 4/4"); |
c93b7e18 AA |
1172 | return wpa_eapol_key_send(sm, ptk->kck, ptk->kck_len, ver, dst, |
1173 | ETH_P_EAPOL, rbuf, rlen, key_mic); | |
6fc6879b JM |
1174 | } |
1175 | ||
1176 | ||
1177 | static void wpa_supplicant_process_3_of_4(struct wpa_sm *sm, | |
1178 | const struct wpa_eapol_key *key, | |
e6270129 JM |
1179 | u16 ver, const u8 *key_data, |
1180 | size_t key_data_len) | |
6fc6879b | 1181 | { |
e6270129 | 1182 | u16 key_info, keylen; |
6fc6879b JM |
1183 | struct wpa_eapol_ie_parse ie; |
1184 | ||
1185 | wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE); | |
f049052b BG |
1186 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 3 of 4-Way " |
1187 | "Handshake from " MACSTR " (ver=%d)", MAC2STR(sm->bssid), ver); | |
6fc6879b JM |
1188 | |
1189 | key_info = WPA_GET_BE16(key->key_info); | |
1190 | ||
e6270129 JM |
1191 | wpa_hexdump(MSG_DEBUG, "WPA: IE KeyData", key_data, key_data_len); |
1192 | if (wpa_supplicant_parse_ies(key_data, key_data_len, &ie) < 0) | |
d627a939 | 1193 | goto failed; |
6fc6879b | 1194 | if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { |
f049052b BG |
1195 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1196 | "WPA: GTK IE in unencrypted key data"); | |
83935317 | 1197 | goto failed; |
6fc6879b JM |
1198 | } |
1199 | #ifdef CONFIG_IEEE80211W | |
1200 | if (ie.igtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { | |
f049052b BG |
1201 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1202 | "WPA: IGTK KDE in unencrypted key data"); | |
83935317 | 1203 | goto failed; |
6fc6879b JM |
1204 | } |
1205 | ||
8dd9f9cd JM |
1206 | if (ie.igtk && |
1207 | wpa_cipher_valid_mgmt_group(sm->mgmt_group_cipher) && | |
1208 | ie.igtk_len != WPA_IGTK_KDE_PREFIX_LEN + | |
1209 | (unsigned int) wpa_cipher_key_len(sm->mgmt_group_cipher)) { | |
f049052b BG |
1210 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1211 | "WPA: Invalid IGTK KDE length %lu", | |
1212 | (unsigned long) ie.igtk_len); | |
83935317 | 1213 | goto failed; |
6fc6879b JM |
1214 | } |
1215 | #endif /* CONFIG_IEEE80211W */ | |
1216 | ||
1217 | if (wpa_supplicant_validate_ie(sm, sm->bssid, &ie) < 0) | |
83935317 | 1218 | goto failed; |
6fc6879b JM |
1219 | |
1220 | if (os_memcmp(sm->anonce, key->key_nonce, WPA_NONCE_LEN) != 0) { | |
f049052b BG |
1221 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1222 | "WPA: ANonce from message 1 of 4-Way Handshake " | |
1223 | "differs from 3 of 4-Way Handshake - drop packet (src=" | |
1224 | MACSTR ")", MAC2STR(sm->bssid)); | |
83935317 | 1225 | goto failed; |
6fc6879b JM |
1226 | } |
1227 | ||
1228 | keylen = WPA_GET_BE16(key->key_length); | |
c3550295 JM |
1229 | if (keylen != wpa_cipher_key_len(sm->pairwise_cipher)) { |
1230 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, | |
1231 | "WPA: Invalid %s key length %d (src=" MACSTR | |
1232 | ")", wpa_cipher_txt(sm->pairwise_cipher), keylen, | |
1233 | MAC2STR(sm->bssid)); | |
1234 | goto failed; | |
6fc6879b JM |
1235 | } |
1236 | ||
25ef8529 JM |
1237 | #ifdef CONFIG_P2P |
1238 | if (ie.ip_addr_alloc) { | |
1239 | os_memcpy(sm->p2p_ip_addr, ie.ip_addr_alloc, 3 * 4); | |
1240 | wpa_hexdump(MSG_DEBUG, "P2P: IP address info", | |
1241 | sm->p2p_ip_addr, sizeof(sm->p2p_ip_addr)); | |
1242 | } | |
1243 | #endif /* CONFIG_P2P */ | |
1244 | ||
6fc6879b | 1245 | if (wpa_supplicant_send_4_of_4(sm, sm->bssid, key, ver, key_info, |
c93b7e18 | 1246 | &sm->ptk) < 0) { |
83935317 JM |
1247 | goto failed; |
1248 | } | |
6fc6879b JM |
1249 | |
1250 | /* SNonce was successfully used in msg 3/4, so mark it to be renewed | |
1251 | * for the next 4-Way Handshake. If msg 3 is received again, the old | |
1252 | * SNonce will still be used to avoid changing PTK. */ | |
1253 | sm->renew_snonce = 1; | |
1254 | ||
1255 | if (key_info & WPA_KEY_INFO_INSTALL) { | |
83935317 JM |
1256 | if (wpa_supplicant_install_ptk(sm, key)) |
1257 | goto failed; | |
6fc6879b JM |
1258 | } |
1259 | ||
1260 | if (key_info & WPA_KEY_INFO_SECURE) { | |
1261 | wpa_sm_mlme_setprotection( | |
1262 | sm, sm->bssid, MLME_SETPROTECTION_PROTECT_TYPE_RX, | |
1263 | MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); | |
1264 | eapol_sm_notify_portValid(sm->eapol, TRUE); | |
1265 | } | |
1266 | wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); | |
1267 | ||
dff1e285 JM |
1268 | if (sm->group_cipher == WPA_CIPHER_GTK_NOT_USED) { |
1269 | wpa_supplicant_key_neg_complete(sm, sm->bssid, | |
1270 | key_info & WPA_KEY_INFO_SECURE); | |
1271 | } else if (ie.gtk && | |
6fc6879b JM |
1272 | wpa_supplicant_pairwise_gtk(sm, key, |
1273 | ie.gtk, ie.gtk_len, key_info) < 0) { | |
f049052b BG |
1274 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1275 | "RSN: Failed to configure GTK"); | |
83935317 | 1276 | goto failed; |
6fc6879b JM |
1277 | } |
1278 | ||
83935317 | 1279 | if (ieee80211w_set_keys(sm, &ie) < 0) { |
f049052b BG |
1280 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1281 | "RSN: Failed to configure IGTK"); | |
83935317 JM |
1282 | goto failed; |
1283 | } | |
1284 | ||
392e68e8 SD |
1285 | if (ie.gtk) |
1286 | wpa_sm_set_rekey_offload(sm); | |
b14a210c | 1287 | |
087a1f4e JM |
1288 | if (sm->proto == WPA_PROTO_RSN && wpa_key_mgmt_suite_b(sm->key_mgmt)) { |
1289 | struct rsn_pmksa_cache_entry *sa; | |
1290 | ||
70c93963 | 1291 | sa = pmksa_cache_add(sm->pmksa, sm->pmk, sm->pmk_len, NULL, |
98cd3d1c | 1292 | sm->ptk.kck, sm->ptk.kck_len, |
087a1f4e JM |
1293 | sm->bssid, sm->own_addr, |
1294 | sm->network_ctx, sm->key_mgmt); | |
1295 | if (!sm->cur_pmksa) | |
1296 | sm->cur_pmksa = sa; | |
1297 | } | |
1298 | ||
761396e4 | 1299 | sm->msg_3_of_4_ok = 1; |
83935317 JM |
1300 | return; |
1301 | ||
1302 | failed: | |
1303 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); | |
6fc6879b JM |
1304 | } |
1305 | ||
1306 | ||
1307 | static int wpa_supplicant_process_1_of_2_rsn(struct wpa_sm *sm, | |
1308 | const u8 *keydata, | |
1309 | size_t keydatalen, | |
1310 | u16 key_info, | |
1311 | struct wpa_gtk_data *gd) | |
1312 | { | |
1313 | int maxkeylen; | |
1314 | struct wpa_eapol_ie_parse ie; | |
1315 | ||
1316 | wpa_hexdump(MSG_DEBUG, "RSN: msg 1/2 key data", keydata, keydatalen); | |
d627a939 JM |
1317 | if (wpa_supplicant_parse_ies(keydata, keydatalen, &ie) < 0) |
1318 | return -1; | |
6fc6879b | 1319 | if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { |
f049052b BG |
1320 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1321 | "WPA: GTK IE in unencrypted key data"); | |
6fc6879b JM |
1322 | return -1; |
1323 | } | |
1324 | if (ie.gtk == NULL) { | |
f049052b BG |
1325 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1326 | "WPA: No GTK IE in Group Key msg 1/2"); | |
6fc6879b JM |
1327 | return -1; |
1328 | } | |
1329 | maxkeylen = gd->gtk_len = ie.gtk_len - 2; | |
1330 | ||
f049052b | 1331 | if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, |
6fc6879b JM |
1332 | gd->gtk_len, maxkeylen, |
1333 | &gd->key_rsc_len, &gd->alg)) | |
1334 | return -1; | |
1335 | ||
7cb9bb4d JM |
1336 | wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in group key handshake", |
1337 | ie.gtk, ie.gtk_len); | |
6fc6879b JM |
1338 | gd->keyidx = ie.gtk[0] & 0x3; |
1339 | gd->tx = wpa_supplicant_gtk_tx_bit_workaround(sm, | |
1340 | !!(ie.gtk[0] & BIT(2))); | |
1341 | if (ie.gtk_len - 2 > sizeof(gd->gtk)) { | |
f049052b BG |
1342 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1343 | "RSN: Too long GTK in GTK IE (len=%lu)", | |
1344 | (unsigned long) ie.gtk_len - 2); | |
6fc6879b JM |
1345 | return -1; |
1346 | } | |
1347 | os_memcpy(gd->gtk, ie.gtk + 2, ie.gtk_len - 2); | |
1348 | ||
1349 | if (ieee80211w_set_keys(sm, &ie) < 0) | |
f049052b BG |
1350 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1351 | "RSN: Failed to configure IGTK"); | |
6fc6879b JM |
1352 | |
1353 | return 0; | |
1354 | } | |
1355 | ||
1356 | ||
1357 | static int wpa_supplicant_process_1_of_2_wpa(struct wpa_sm *sm, | |
1358 | const struct wpa_eapol_key *key, | |
e6270129 JM |
1359 | const u8 *key_data, |
1360 | size_t key_data_len, u16 key_info, | |
1361 | u16 ver, struct wpa_gtk_data *gd) | |
6fc6879b JM |
1362 | { |
1363 | size_t maxkeylen; | |
c397eff8 | 1364 | u16 gtk_len; |
6fc6879b | 1365 | |
c397eff8 | 1366 | gtk_len = WPA_GET_BE16(key->key_length); |
e6270129 | 1367 | maxkeylen = key_data_len; |
6fc6879b JM |
1368 | if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { |
1369 | if (maxkeylen < 8) { | |
f049052b BG |
1370 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1371 | "WPA: Too short maxkeylen (%lu)", | |
1372 | (unsigned long) maxkeylen); | |
6fc6879b JM |
1373 | return -1; |
1374 | } | |
1375 | maxkeylen -= 8; | |
1376 | } | |
1377 | ||
c397eff8 JM |
1378 | if (gtk_len > maxkeylen || |
1379 | wpa_supplicant_check_group_cipher(sm, sm->group_cipher, | |
1380 | gtk_len, maxkeylen, | |
6fc6879b JM |
1381 | &gd->key_rsc_len, &gd->alg)) |
1382 | return -1; | |
1383 | ||
c397eff8 | 1384 | gd->gtk_len = gtk_len; |
6fc6879b JM |
1385 | gd->keyidx = (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> |
1386 | WPA_KEY_INFO_KEY_INDEX_SHIFT; | |
98cd3d1c | 1387 | if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && sm->ptk.kek_len == 16) { |
7cb53ded JM |
1388 | #ifdef CONFIG_NO_RC4 |
1389 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, | |
1390 | "WPA: RC4 not supported in the build"); | |
1391 | return -1; | |
1392 | #else /* CONFIG_NO_RC4 */ | |
d2c33b91 | 1393 | u8 ek[32]; |
e6270129 | 1394 | if (key_data_len > sizeof(gd->gtk)) { |
f049052b BG |
1395 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1396 | "WPA: RC4 key data too long (%lu)", | |
e6270129 | 1397 | (unsigned long) key_data_len); |
6fc6879b JM |
1398 | return -1; |
1399 | } | |
d2c33b91 | 1400 | os_memcpy(ek, key->key_iv, 16); |
98cd3d1c | 1401 | os_memcpy(ek + 16, sm->ptk.kek, sm->ptk.kek_len); |
e6270129 JM |
1402 | os_memcpy(gd->gtk, key_data, key_data_len); |
1403 | if (rc4_skip(ek, 32, 256, gd->gtk, key_data_len)) { | |
d2c33b91 | 1404 | os_memset(ek, 0, sizeof(ek)); |
f049052b BG |
1405 | wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, |
1406 | "WPA: RC4 failed"); | |
7a215dfc JM |
1407 | return -1; |
1408 | } | |
d2c33b91 | 1409 | os_memset(ek, 0, sizeof(ek)); |
7cb53ded | 1410 | #endif /* CONFIG_NO_RC4 */ |
6fc6879b | 1411 | } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { |
e6270129 | 1412 | if (maxkeylen % 8) { |
f049052b BG |
1413 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1414 | "WPA: Unsupported AES-WRAP len %lu", | |
e6270129 | 1415 | (unsigned long) maxkeylen); |
6fc6879b JM |
1416 | return -1; |
1417 | } | |
1418 | if (maxkeylen > sizeof(gd->gtk)) { | |
f049052b BG |
1419 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1420 | "WPA: AES-WRAP key data " | |
1421 | "too long (keydatalen=%lu maxkeylen=%lu)", | |
e6270129 | 1422 | (unsigned long) key_data_len, |
f049052b | 1423 | (unsigned long) maxkeylen); |
6fc6879b JM |
1424 | return -1; |
1425 | } | |
98cd3d1c JM |
1426 | if (aes_unwrap(sm->ptk.kek, sm->ptk.kek_len, maxkeylen / 8, |
1427 | key_data, gd->gtk)) { | |
f049052b BG |
1428 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1429 | "WPA: AES unwrap failed - could not decrypt " | |
1430 | "GTK"); | |
6fc6879b JM |
1431 | return -1; |
1432 | } | |
1433 | } else { | |
f049052b BG |
1434 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1435 | "WPA: Unsupported key_info type %d", ver); | |
6fc6879b JM |
1436 | return -1; |
1437 | } | |
1438 | gd->tx = wpa_supplicant_gtk_tx_bit_workaround( | |
1439 | sm, !!(key_info & WPA_KEY_INFO_TXRX)); | |
1440 | return 0; | |
1441 | } | |
1442 | ||
1443 | ||
1444 | static int wpa_supplicant_send_2_of_2(struct wpa_sm *sm, | |
1445 | const struct wpa_eapol_key *key, | |
1446 | int ver, u16 key_info) | |
1447 | { | |
5e3b5197 | 1448 | size_t mic_len, hdrlen, rlen; |
6fc6879b | 1449 | struct wpa_eapol_key *reply; |
5e3b5197 | 1450 | u8 *rbuf, *key_mic; |
6fc6879b | 1451 | |
5e3b5197 | 1452 | mic_len = wpa_mic_len(sm->key_mgmt); |
6d014ffc | 1453 | hdrlen = sizeof(*reply) + mic_len + 2; |
6fc6879b | 1454 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, |
5e3b5197 | 1455 | hdrlen, &rlen, (void *) &reply); |
6fc6879b JM |
1456 | if (rbuf == NULL) |
1457 | return -1; | |
1458 | ||
a14896e8 JM |
1459 | reply->type = (sm->proto == WPA_PROTO_RSN || |
1460 | sm->proto == WPA_PROTO_OSEN) ? | |
6fc6879b JM |
1461 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; |
1462 | key_info &= WPA_KEY_INFO_KEY_INDEX_MASK; | |
4a26ccda JM |
1463 | key_info |= ver | WPA_KEY_INFO_SECURE; |
1464 | if (mic_len) | |
1465 | key_info |= WPA_KEY_INFO_MIC; | |
6fc6879b | 1466 | WPA_PUT_BE16(reply->key_info, key_info); |
a14896e8 | 1467 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) |
6fc6879b JM |
1468 | WPA_PUT_BE16(reply->key_length, 0); |
1469 | else | |
1470 | os_memcpy(reply->key_length, key->key_length, 2); | |
1471 | os_memcpy(reply->replay_counter, key->replay_counter, | |
1472 | WPA_REPLAY_COUNTER_LEN); | |
1473 | ||
6d014ffc JM |
1474 | key_mic = (u8 *) (reply + 1); |
1475 | WPA_PUT_BE16(key_mic + mic_len, 0); | |
6fc6879b | 1476 | |
f049052b | 1477 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/2"); |
c93b7e18 AA |
1478 | return wpa_eapol_key_send(sm, sm->ptk.kck, sm->ptk.kck_len, ver, |
1479 | sm->bssid, ETH_P_EAPOL, rbuf, rlen, key_mic); | |
6fc6879b JM |
1480 | } |
1481 | ||
1482 | ||
1483 | static void wpa_supplicant_process_1_of_2(struct wpa_sm *sm, | |
1484 | const unsigned char *src_addr, | |
1485 | const struct wpa_eapol_key *key, | |
e6270129 JM |
1486 | const u8 *key_data, |
1487 | size_t key_data_len, u16 ver) | |
6fc6879b | 1488 | { |
e6270129 | 1489 | u16 key_info; |
6fc6879b JM |
1490 | int rekey, ret; |
1491 | struct wpa_gtk_data gd; | |
73ed03f3 | 1492 | const u8 *key_rsc; |
6fc6879b | 1493 | |
761396e4 JM |
1494 | if (!sm->msg_3_of_4_ok) { |
1495 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, | |
1496 | "WPA: Group Key Handshake started prior to completion of 4-way handshake"); | |
1497 | goto failed; | |
1498 | } | |
1499 | ||
6fc6879b JM |
1500 | os_memset(&gd, 0, sizeof(gd)); |
1501 | ||
1502 | rekey = wpa_sm_get_state(sm) == WPA_COMPLETED; | |
f049052b BG |
1503 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of Group Key " |
1504 | "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver); | |
6fc6879b JM |
1505 | |
1506 | key_info = WPA_GET_BE16(key->key_info); | |
6fc6879b | 1507 | |
a14896e8 | 1508 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { |
e6270129 JM |
1509 | ret = wpa_supplicant_process_1_of_2_rsn(sm, key_data, |
1510 | key_data_len, key_info, | |
6fc6879b JM |
1511 | &gd); |
1512 | } else { | |
e6270129 JM |
1513 | ret = wpa_supplicant_process_1_of_2_wpa(sm, key, key_data, |
1514 | key_data_len, | |
1515 | key_info, ver, &gd); | |
6fc6879b JM |
1516 | } |
1517 | ||
1518 | wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); | |
1519 | ||
1520 | if (ret) | |
83935317 | 1521 | goto failed; |
6fc6879b | 1522 | |
73ed03f3 MS |
1523 | key_rsc = key->key_rsc; |
1524 | if (wpa_supplicant_rsc_relaxation(sm, key->key_rsc)) | |
1525 | key_rsc = null_rsc; | |
1526 | ||
1527 | if (wpa_supplicant_install_gtk(sm, &gd, key_rsc) || | |
c93b7e18 | 1528 | wpa_supplicant_send_2_of_2(sm, key, ver, key_info) < 0) |
83935317 | 1529 | goto failed; |
fbfc974c | 1530 | os_memset(&gd, 0, sizeof(gd)); |
6fc6879b JM |
1531 | |
1532 | if (rekey) { | |
0f057fb2 | 1533 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Group rekeying " |
6fc6879b JM |
1534 | "completed with " MACSTR " [GTK=%s]", |
1535 | MAC2STR(sm->bssid), wpa_cipher_txt(sm->group_cipher)); | |
1536 | wpa_sm_cancel_auth_timeout(sm); | |
1537 | wpa_sm_set_state(sm, WPA_COMPLETED); | |
1538 | } else { | |
1539 | wpa_supplicant_key_neg_complete(sm, sm->bssid, | |
1540 | key_info & | |
1541 | WPA_KEY_INFO_SECURE); | |
1542 | } | |
392e68e8 SD |
1543 | |
1544 | wpa_sm_set_rekey_offload(sm); | |
1545 | ||
83935317 JM |
1546 | return; |
1547 | ||
1548 | failed: | |
fbfc974c | 1549 | os_memset(&gd, 0, sizeof(gd)); |
83935317 | 1550 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); |
6fc6879b JM |
1551 | } |
1552 | ||
1553 | ||
1554 | static int wpa_supplicant_verify_eapol_key_mic(struct wpa_sm *sm, | |
6d014ffc | 1555 | struct wpa_eapol_key *key, |
6fc6879b JM |
1556 | u16 ver, |
1557 | const u8 *buf, size_t len) | |
1558 | { | |
98cd3d1c | 1559 | u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN]; |
6fc6879b | 1560 | int ok = 0; |
5e3b5197 | 1561 | size_t mic_len = wpa_mic_len(sm->key_mgmt); |
6fc6879b | 1562 | |
6d014ffc | 1563 | os_memcpy(mic, key + 1, mic_len); |
6fc6879b | 1564 | if (sm->tptk_set) { |
6d014ffc | 1565 | os_memset(key + 1, 0, mic_len); |
98cd3d1c | 1566 | wpa_eapol_key_mic(sm->tptk.kck, sm->tptk.kck_len, sm->key_mgmt, |
6d014ffc JM |
1567 | ver, buf, len, (u8 *) (key + 1)); |
1568 | if (os_memcmp_const(mic, key + 1, mic_len) != 0) { | |
f049052b BG |
1569 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1570 | "WPA: Invalid EAPOL-Key MIC " | |
1571 | "when using TPTK - ignoring TPTK"); | |
6fc6879b JM |
1572 | } else { |
1573 | ok = 1; | |
1574 | sm->tptk_set = 0; | |
1575 | sm->ptk_set = 1; | |
1576 | os_memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk)); | |
d2c33b91 | 1577 | os_memset(&sm->tptk, 0, sizeof(sm->tptk)); |
6fc6879b JM |
1578 | } |
1579 | } | |
1580 | ||
1581 | if (!ok && sm->ptk_set) { | |
6d014ffc | 1582 | os_memset(key + 1, 0, mic_len); |
98cd3d1c | 1583 | wpa_eapol_key_mic(sm->ptk.kck, sm->ptk.kck_len, sm->key_mgmt, |
6d014ffc JM |
1584 | ver, buf, len, (u8 *) (key + 1)); |
1585 | if (os_memcmp_const(mic, key + 1, mic_len) != 0) { | |
f049052b BG |
1586 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1587 | "WPA: Invalid EAPOL-Key MIC - " | |
1588 | "dropping packet"); | |
6fc6879b JM |
1589 | return -1; |
1590 | } | |
1591 | ok = 1; | |
1592 | } | |
1593 | ||
1594 | if (!ok) { | |
f049052b BG |
1595 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1596 | "WPA: Could not verify EAPOL-Key MIC - " | |
1597 | "dropping packet"); | |
6fc6879b JM |
1598 | return -1; |
1599 | } | |
1600 | ||
1601 | os_memcpy(sm->rx_replay_counter, key->replay_counter, | |
1602 | WPA_REPLAY_COUNTER_LEN); | |
1603 | sm->rx_replay_counter_set = 1; | |
1604 | return 0; | |
1605 | } | |
1606 | ||
1607 | ||
1608 | /* Decrypt RSN EAPOL-Key key data (RC4 or AES-WRAP) */ | |
1609 | static int wpa_supplicant_decrypt_key_data(struct wpa_sm *sm, | |
6d014ffc JM |
1610 | struct wpa_eapol_key *key, |
1611 | size_t mic_len, u16 ver, | |
e6270129 | 1612 | u8 *key_data, size_t *key_data_len) |
6fc6879b | 1613 | { |
6fc6879b | 1614 | wpa_hexdump(MSG_DEBUG, "RSN: encrypted key data", |
e6270129 | 1615 | key_data, *key_data_len); |
6fc6879b | 1616 | if (!sm->ptk_set) { |
f049052b BG |
1617 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1618 | "WPA: PTK not available, cannot decrypt EAPOL-Key Key " | |
1619 | "Data"); | |
6fc6879b JM |
1620 | return -1; |
1621 | } | |
1622 | ||
1623 | /* Decrypt key data here so that this operation does not need | |
1624 | * to be implemented separately for each message type. */ | |
98cd3d1c | 1625 | if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && sm->ptk.kek_len == 16) { |
7cb53ded JM |
1626 | #ifdef CONFIG_NO_RC4 |
1627 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, | |
1628 | "WPA: RC4 not supported in the build"); | |
1629 | return -1; | |
1630 | #else /* CONFIG_NO_RC4 */ | |
6fc6879b JM |
1631 | u8 ek[32]; |
1632 | os_memcpy(ek, key->key_iv, 16); | |
98cd3d1c | 1633 | os_memcpy(ek + 16, sm->ptk.kek, sm->ptk.kek_len); |
e6270129 | 1634 | if (rc4_skip(ek, 32, 256, key_data, *key_data_len)) { |
d2c33b91 | 1635 | os_memset(ek, 0, sizeof(ek)); |
f049052b BG |
1636 | wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, |
1637 | "WPA: RC4 failed"); | |
7a215dfc JM |
1638 | return -1; |
1639 | } | |
d2c33b91 | 1640 | os_memset(ek, 0, sizeof(ek)); |
7cb53ded | 1641 | #endif /* CONFIG_NO_RC4 */ |
6fc6879b | 1642 | } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || |
df0f01d9 | 1643 | ver == WPA_KEY_INFO_TYPE_AES_128_CMAC || |
929a2ea5 JM |
1644 | sm->key_mgmt == WPA_KEY_MGMT_OSEN || |
1645 | wpa_key_mgmt_suite_b(sm->key_mgmt)) { | |
6fc6879b | 1646 | u8 *buf; |
e6270129 | 1647 | if (*key_data_len < 8 || *key_data_len % 8) { |
f049052b | 1648 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
e6270129 JM |
1649 | "WPA: Unsupported AES-WRAP len %u", |
1650 | (unsigned int) *key_data_len); | |
6fc6879b JM |
1651 | return -1; |
1652 | } | |
e6270129 JM |
1653 | *key_data_len -= 8; /* AES-WRAP adds 8 bytes */ |
1654 | buf = os_malloc(*key_data_len); | |
6fc6879b | 1655 | if (buf == NULL) { |
f049052b BG |
1656 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1657 | "WPA: No memory for AES-UNWRAP buffer"); | |
6fc6879b JM |
1658 | return -1; |
1659 | } | |
98cd3d1c | 1660 | if (aes_unwrap(sm->ptk.kek, sm->ptk.kek_len, *key_data_len / 8, |
e6270129 | 1661 | key_data, buf)) { |
cd5895e8 | 1662 | bin_clear_free(buf, *key_data_len); |
f049052b BG |
1663 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1664 | "WPA: AES unwrap failed - " | |
1665 | "could not decrypt EAPOL-Key key data"); | |
6fc6879b JM |
1666 | return -1; |
1667 | } | |
e6270129 | 1668 | os_memcpy(key_data, buf, *key_data_len); |
cd5895e8 | 1669 | bin_clear_free(buf, *key_data_len); |
6d014ffc | 1670 | WPA_PUT_BE16(((u8 *) (key + 1)) + mic_len, *key_data_len); |
6fc6879b | 1671 | } else { |
f049052b BG |
1672 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1673 | "WPA: Unsupported key_info type %d", ver); | |
6fc6879b JM |
1674 | return -1; |
1675 | } | |
1676 | wpa_hexdump_key(MSG_DEBUG, "WPA: decrypted EAPOL-Key key data", | |
e6270129 | 1677 | key_data, *key_data_len); |
6fc6879b JM |
1678 | return 0; |
1679 | } | |
1680 | ||
1681 | ||
1682 | /** | |
1683 | * wpa_sm_aborted_cached - Notify WPA that PMKSA caching was aborted | |
1684 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
1685 | */ | |
1686 | void wpa_sm_aborted_cached(struct wpa_sm *sm) | |
1687 | { | |
1688 | if (sm && sm->cur_pmksa) { | |
f049052b BG |
1689 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1690 | "RSN: Cancelling PMKSA caching attempt"); | |
6fc6879b JM |
1691 | sm->cur_pmksa = NULL; |
1692 | } | |
1693 | } | |
1694 | ||
1695 | ||
f049052b | 1696 | static void wpa_eapol_key_dump(struct wpa_sm *sm, |
5e3b5197 JM |
1697 | const struct wpa_eapol_key *key, |
1698 | unsigned int key_data_len, | |
1699 | const u8 *mic, unsigned int mic_len) | |
6fc6879b JM |
1700 | { |
1701 | #ifndef CONFIG_NO_STDOUT_DEBUG | |
1702 | u16 key_info = WPA_GET_BE16(key->key_info); | |
1703 | ||
f049052b BG |
1704 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, " EAPOL-Key type=%d", key->type); |
1705 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
1706 | " key_info 0x%x (ver=%d keyidx=%d rsvd=%d %s%s%s%s%s%s%s%s)", | |
1707 | key_info, key_info & WPA_KEY_INFO_TYPE_MASK, | |
1708 | (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> | |
1709 | WPA_KEY_INFO_KEY_INDEX_SHIFT, | |
1710 | (key_info & (BIT(13) | BIT(14) | BIT(15))) >> 13, | |
1711 | key_info & WPA_KEY_INFO_KEY_TYPE ? "Pairwise" : "Group", | |
1712 | key_info & WPA_KEY_INFO_INSTALL ? " Install" : "", | |
1713 | key_info & WPA_KEY_INFO_ACK ? " Ack" : "", | |
1714 | key_info & WPA_KEY_INFO_MIC ? " MIC" : "", | |
1715 | key_info & WPA_KEY_INFO_SECURE ? " Secure" : "", | |
1716 | key_info & WPA_KEY_INFO_ERROR ? " Error" : "", | |
1717 | key_info & WPA_KEY_INFO_REQUEST ? " Request" : "", | |
1718 | key_info & WPA_KEY_INFO_ENCR_KEY_DATA ? " Encr" : ""); | |
1719 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
1720 | " key_length=%u key_data_length=%u", | |
5e3b5197 | 1721 | WPA_GET_BE16(key->key_length), key_data_len); |
6fc6879b JM |
1722 | wpa_hexdump(MSG_DEBUG, " replay_counter", |
1723 | key->replay_counter, WPA_REPLAY_COUNTER_LEN); | |
1724 | wpa_hexdump(MSG_DEBUG, " key_nonce", key->key_nonce, WPA_NONCE_LEN); | |
1725 | wpa_hexdump(MSG_DEBUG, " key_iv", key->key_iv, 16); | |
1726 | wpa_hexdump(MSG_DEBUG, " key_rsc", key->key_rsc, 8); | |
1727 | wpa_hexdump(MSG_DEBUG, " key_id (reserved)", key->key_id, 8); | |
5e3b5197 | 1728 | wpa_hexdump(MSG_DEBUG, " key_mic", mic, mic_len); |
6fc6879b JM |
1729 | #endif /* CONFIG_NO_STDOUT_DEBUG */ |
1730 | } | |
1731 | ||
1732 | ||
1733 | /** | |
1734 | * wpa_sm_rx_eapol - Process received WPA EAPOL frames | |
1735 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
1736 | * @src_addr: Source MAC address of the EAPOL packet | |
1737 | * @buf: Pointer to the beginning of the EAPOL data (EAPOL header) | |
1738 | * @len: Length of the EAPOL frame | |
1739 | * Returns: 1 = WPA EAPOL-Key processed, 0 = not a WPA EAPOL-Key, -1 failure | |
1740 | * | |
1741 | * This function is called for each received EAPOL frame. Other than EAPOL-Key | |
1742 | * frames can be skipped if filtering is done elsewhere. wpa_sm_rx_eapol() is | |
1743 | * only processing WPA and WPA2 EAPOL-Key frames. | |
1744 | * | |
1745 | * The received EAPOL-Key packets are validated and valid packets are replied | |
1746 | * to. In addition, key material (PTK, GTK) is configured at the end of a | |
1747 | * successful key handshake. | |
1748 | */ | |
1749 | int wpa_sm_rx_eapol(struct wpa_sm *sm, const u8 *src_addr, | |
1750 | const u8 *buf, size_t len) | |
1751 | { | |
e6270129 | 1752 | size_t plen, data_len, key_data_len; |
d56d7e56 | 1753 | const struct ieee802_1x_hdr *hdr; |
6fc6879b JM |
1754 | struct wpa_eapol_key *key; |
1755 | u16 key_info, ver; | |
d56d7e56 | 1756 | u8 *tmp = NULL; |
6fc6879b JM |
1757 | int ret = -1; |
1758 | struct wpa_peerkey *peerkey = NULL; | |
6d014ffc | 1759 | u8 *mic, *key_data; |
5e3b5197 | 1760 | size_t mic_len, keyhdrlen; |
6fc6879b JM |
1761 | |
1762 | #ifdef CONFIG_IEEE80211R | |
1763 | sm->ft_completed = 0; | |
1764 | #endif /* CONFIG_IEEE80211R */ | |
1765 | ||
5e3b5197 | 1766 | mic_len = wpa_mic_len(sm->key_mgmt); |
6d014ffc | 1767 | keyhdrlen = sizeof(*key) + mic_len + 2; |
5e3b5197 JM |
1768 | |
1769 | if (len < sizeof(*hdr) + keyhdrlen) { | |
f049052b BG |
1770 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1771 | "WPA: EAPOL frame too short to be a WPA " | |
1772 | "EAPOL-Key (len %lu, expecting at least %lu)", | |
1773 | (unsigned long) len, | |
5e3b5197 | 1774 | (unsigned long) sizeof(*hdr) + keyhdrlen); |
6fc6879b JM |
1775 | return 0; |
1776 | } | |
1777 | ||
d56d7e56 | 1778 | hdr = (const struct ieee802_1x_hdr *) buf; |
6fc6879b JM |
1779 | plen = be_to_host16(hdr->length); |
1780 | data_len = plen + sizeof(*hdr); | |
f049052b BG |
1781 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1782 | "IEEE 802.1X RX: version=%d type=%d length=%lu", | |
1783 | hdr->version, hdr->type, (unsigned long) plen); | |
6fc6879b JM |
1784 | |
1785 | if (hdr->version < EAPOL_VERSION) { | |
1786 | /* TODO: backwards compatibility */ | |
1787 | } | |
1788 | if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) { | |
f049052b BG |
1789 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1790 | "WPA: EAPOL frame (type %u) discarded, " | |
6fc6879b JM |
1791 | "not a Key frame", hdr->type); |
1792 | ret = 0; | |
1793 | goto out; | |
1794 | } | |
d56d7e56 | 1795 | wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL-Key", buf, len); |
5e3b5197 | 1796 | if (plen > len - sizeof(*hdr) || plen < keyhdrlen) { |
f049052b BG |
1797 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1798 | "WPA: EAPOL frame payload size %lu " | |
1799 | "invalid (frame size %lu)", | |
1800 | (unsigned long) plen, (unsigned long) len); | |
6fc6879b JM |
1801 | ret = 0; |
1802 | goto out; | |
1803 | } | |
d56d7e56 JM |
1804 | if (data_len < len) { |
1805 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
1806 | "WPA: ignoring %lu bytes after the IEEE 802.1X data", | |
1807 | (unsigned long) len - data_len); | |
1808 | } | |
1809 | ||
1810 | /* | |
1811 | * Make a copy of the frame since we need to modify the buffer during | |
1812 | * MAC validation and Key Data decryption. | |
1813 | */ | |
1814 | tmp = os_malloc(data_len); | |
1815 | if (tmp == NULL) | |
1816 | goto out; | |
1817 | os_memcpy(tmp, buf, data_len); | |
1818 | key = (struct wpa_eapol_key *) (tmp + sizeof(struct ieee802_1x_hdr)); | |
6d014ffc JM |
1819 | mic = (u8 *) (key + 1); |
1820 | key_data = mic + mic_len + 2; | |
6fc6879b JM |
1821 | |
1822 | if (key->type != EAPOL_KEY_TYPE_WPA && key->type != EAPOL_KEY_TYPE_RSN) | |
1823 | { | |
f049052b BG |
1824 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1825 | "WPA: EAPOL-Key type (%d) unknown, discarded", | |
1826 | key->type); | |
6fc6879b JM |
1827 | ret = 0; |
1828 | goto out; | |
1829 | } | |
6fc6879b | 1830 | |
6d014ffc JM |
1831 | key_data_len = WPA_GET_BE16(mic + mic_len); |
1832 | wpa_eapol_key_dump(sm, key, key_data_len, mic, mic_len); | |
5e3b5197 JM |
1833 | |
1834 | if (key_data_len > plen - keyhdrlen) { | |
d56d7e56 JM |
1835 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Invalid EAPOL-Key " |
1836 | "frame - key_data overflow (%u > %u)", | |
e6270129 | 1837 | (unsigned int) key_data_len, |
5e3b5197 | 1838 | (unsigned int) (plen - keyhdrlen)); |
d56d7e56 | 1839 | goto out; |
6fc6879b | 1840 | } |
d56d7e56 JM |
1841 | |
1842 | eapol_sm_notify_lower_layer_success(sm->eapol, 0); | |
6fc6879b JM |
1843 | key_info = WPA_GET_BE16(key->key_info); |
1844 | ver = key_info & WPA_KEY_INFO_TYPE_MASK; | |
1845 | if (ver != WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && | |
a20088e5 | 1846 | #if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W) |
6fc6879b | 1847 | ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && |
a20088e5 | 1848 | #endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */ |
df0f01d9 | 1849 | ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES && |
929a2ea5 | 1850 | !wpa_key_mgmt_suite_b(sm->key_mgmt) && |
352caf00 | 1851 | !wpa_key_mgmt_fils(sm->key_mgmt) && |
df0f01d9 | 1852 | sm->key_mgmt != WPA_KEY_MGMT_OSEN) { |
f049052b BG |
1853 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1854 | "WPA: Unsupported EAPOL-Key descriptor version %d", | |
1855 | ver); | |
6fc6879b JM |
1856 | goto out; |
1857 | } | |
1858 | ||
df0f01d9 JM |
1859 | if (sm->key_mgmt == WPA_KEY_MGMT_OSEN && |
1860 | ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) { | |
1861 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, | |
1862 | "OSEN: Unsupported EAPOL-Key descriptor version %d", | |
1863 | ver); | |
1864 | goto out; | |
1865 | } | |
1866 | ||
352caf00 JM |
1867 | if ((wpa_key_mgmt_suite_b(sm->key_mgmt) || |
1868 | wpa_key_mgmt_fils(sm->key_mgmt)) && | |
929a2ea5 JM |
1869 | ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) { |
1870 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, | |
1871 | "RSN: Unsupported EAPOL-Key descriptor version %d (expected AKM defined = 0)", | |
1872 | ver); | |
1873 | goto out; | |
1874 | } | |
1875 | ||
6fc6879b | 1876 | #ifdef CONFIG_IEEE80211R |
56586197 | 1877 | if (wpa_key_mgmt_ft(sm->key_mgmt)) { |
6fc6879b JM |
1878 | /* IEEE 802.11r uses a new key_info type (AES-128-CMAC). */ |
1879 | if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) { | |
f049052b BG |
1880 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1881 | "FT: AP did not use AES-128-CMAC"); | |
6fc6879b JM |
1882 | goto out; |
1883 | } | |
1884 | } else | |
1885 | #endif /* CONFIG_IEEE80211R */ | |
56586197 JM |
1886 | #ifdef CONFIG_IEEE80211W |
1887 | if (wpa_key_mgmt_sha256(sm->key_mgmt)) { | |
df0f01d9 | 1888 | if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && |
929a2ea5 | 1889 | sm->key_mgmt != WPA_KEY_MGMT_OSEN && |
352caf00 | 1890 | !wpa_key_mgmt_fils(sm->key_mgmt) && |
929a2ea5 | 1891 | !wpa_key_mgmt_suite_b(sm->key_mgmt)) { |
f049052b BG |
1892 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1893 | "WPA: AP did not use the " | |
1894 | "negotiated AES-128-CMAC"); | |
56586197 JM |
1895 | goto out; |
1896 | } | |
1897 | } else | |
1898 | #endif /* CONFIG_IEEE80211W */ | |
6fc6879b | 1899 | if (sm->pairwise_cipher == WPA_CIPHER_CCMP && |
929a2ea5 | 1900 | !wpa_key_mgmt_suite_b(sm->key_mgmt) && |
352caf00 | 1901 | !wpa_key_mgmt_fils(sm->key_mgmt) && |
6fc6879b | 1902 | ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { |
f049052b BG |
1903 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1904 | "WPA: CCMP is used, but EAPOL-Key " | |
1905 | "descriptor version (%d) is not 2", ver); | |
6fc6879b JM |
1906 | if (sm->group_cipher != WPA_CIPHER_CCMP && |
1907 | !(key_info & WPA_KEY_INFO_KEY_TYPE)) { | |
1908 | /* Earlier versions of IEEE 802.11i did not explicitly | |
1909 | * require version 2 descriptor for all EAPOL-Key | |
1910 | * packets, so allow group keys to use version 1 if | |
1911 | * CCMP is not used for them. */ | |
f049052b BG |
1912 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1913 | "WPA: Backwards compatibility: allow invalid " | |
1914 | "version for non-CCMP group keys"); | |
9f6a7cdd JM |
1915 | } else if (ver == WPA_KEY_INFO_TYPE_AES_128_CMAC) { |
1916 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, | |
1917 | "WPA: Interoperability workaround: allow incorrect (should have been HMAC-SHA1), but stronger (is AES-128-CMAC), descriptor version to be used"); | |
6fc6879b JM |
1918 | } else |
1919 | goto out; | |
801e1173 | 1920 | } else if (sm->pairwise_cipher == WPA_CIPHER_GCMP && |
929a2ea5 | 1921 | !wpa_key_mgmt_suite_b(sm->key_mgmt) && |
801e1173 | 1922 | ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { |
eb7719ff JM |
1923 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1924 | "WPA: GCMP is used, but EAPOL-Key " | |
1925 | "descriptor version (%d) is not 2", ver); | |
1926 | goto out; | |
1927 | } | |
6fc6879b JM |
1928 | |
1929 | #ifdef CONFIG_PEERKEY | |
1930 | for (peerkey = sm->peerkey; peerkey; peerkey = peerkey->next) { | |
1931 | if (os_memcmp(peerkey->addr, src_addr, ETH_ALEN) == 0) | |
1932 | break; | |
1933 | } | |
1934 | ||
1935 | if (!(key_info & WPA_KEY_INFO_SMK_MESSAGE) && peerkey) { | |
1936 | if (!peerkey->initiator && peerkey->replay_counter_set && | |
1937 | os_memcmp(key->replay_counter, peerkey->replay_counter, | |
1938 | WPA_REPLAY_COUNTER_LEN) <= 0) { | |
f049052b BG |
1939 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1940 | "RSN: EAPOL-Key Replay Counter did not " | |
1941 | "increase (STK) - dropping packet"); | |
6fc6879b JM |
1942 | goto out; |
1943 | } else if (peerkey->initiator) { | |
1944 | u8 _tmp[WPA_REPLAY_COUNTER_LEN]; | |
1945 | os_memcpy(_tmp, key->replay_counter, | |
1946 | WPA_REPLAY_COUNTER_LEN); | |
1947 | inc_byte_array(_tmp, WPA_REPLAY_COUNTER_LEN); | |
1948 | if (os_memcmp(_tmp, peerkey->replay_counter, | |
1949 | WPA_REPLAY_COUNTER_LEN) != 0) { | |
f049052b BG |
1950 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1951 | "RSN: EAPOL-Key Replay " | |
1952 | "Counter did not match (STK) - " | |
1953 | "dropping packet"); | |
6fc6879b JM |
1954 | goto out; |
1955 | } | |
1956 | } | |
1957 | } | |
1958 | ||
1959 | if (peerkey && peerkey->initiator && (key_info & WPA_KEY_INFO_ACK)) { | |
f049052b BG |
1960 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1961 | "RSN: Ack bit in key_info from STK peer"); | |
6fc6879b JM |
1962 | goto out; |
1963 | } | |
1964 | #endif /* CONFIG_PEERKEY */ | |
1965 | ||
1966 | if (!peerkey && sm->rx_replay_counter_set && | |
1967 | os_memcmp(key->replay_counter, sm->rx_replay_counter, | |
1968 | WPA_REPLAY_COUNTER_LEN) <= 0) { | |
f049052b BG |
1969 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1970 | "WPA: EAPOL-Key Replay Counter did not increase - " | |
1971 | "dropping packet"); | |
6fc6879b JM |
1972 | goto out; |
1973 | } | |
1974 | ||
1975 | if (!(key_info & (WPA_KEY_INFO_ACK | WPA_KEY_INFO_SMK_MESSAGE)) | |
1976 | #ifdef CONFIG_PEERKEY | |
1977 | && (peerkey == NULL || !peerkey->initiator) | |
1978 | #endif /* CONFIG_PEERKEY */ | |
1979 | ) { | |
f049052b BG |
1980 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1981 | "WPA: No Ack bit in key_info"); | |
6fc6879b JM |
1982 | goto out; |
1983 | } | |
1984 | ||
1985 | if (key_info & WPA_KEY_INFO_REQUEST) { | |
f049052b BG |
1986 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1987 | "WPA: EAPOL-Key with Request bit - dropped"); | |
6fc6879b JM |
1988 | goto out; |
1989 | } | |
1990 | ||
1991 | if ((key_info & WPA_KEY_INFO_MIC) && !peerkey && | |
6d014ffc | 1992 | wpa_supplicant_verify_eapol_key_mic(sm, key, ver, tmp, data_len)) |
6fc6879b JM |
1993 | goto out; |
1994 | ||
1995 | #ifdef CONFIG_PEERKEY | |
1996 | if ((key_info & WPA_KEY_INFO_MIC) && peerkey && | |
6d014ffc | 1997 | peerkey_verify_eapol_key_mic(sm, peerkey, key, ver, tmp, |
5e3b5197 | 1998 | data_len)) |
6fc6879b JM |
1999 | goto out; |
2000 | #endif /* CONFIG_PEERKEY */ | |
2001 | ||
a14896e8 | 2002 | if ((sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) && |
6fc6879b | 2003 | (key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { |
6d014ffc JM |
2004 | if (wpa_supplicant_decrypt_key_data(sm, key, mic_len, |
2005 | ver, key_data, | |
e6270129 | 2006 | &key_data_len)) |
d56d7e56 | 2007 | goto out; |
6fc6879b JM |
2008 | } |
2009 | ||
2010 | if (key_info & WPA_KEY_INFO_KEY_TYPE) { | |
2011 | if (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) { | |
f049052b BG |
2012 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
2013 | "WPA: Ignored EAPOL-Key (Pairwise) with " | |
2014 | "non-zero key index"); | |
6fc6879b JM |
2015 | goto out; |
2016 | } | |
2017 | if (peerkey) { | |
2018 | /* PeerKey 4-Way Handshake */ | |
f107d00c JM |
2019 | peerkey_rx_eapol_4way(sm, peerkey, key, key_info, ver, |
2020 | key_data, key_data_len); | |
6fc6879b JM |
2021 | } else if (key_info & WPA_KEY_INFO_MIC) { |
2022 | /* 3/4 4-Way Handshake */ | |
e6270129 JM |
2023 | wpa_supplicant_process_3_of_4(sm, key, ver, key_data, |
2024 | key_data_len); | |
6fc6879b JM |
2025 | } else { |
2026 | /* 1/4 4-Way Handshake */ | |
2027 | wpa_supplicant_process_1_of_4(sm, src_addr, key, | |
e6270129 JM |
2028 | ver, key_data, |
2029 | key_data_len); | |
6fc6879b JM |
2030 | } |
2031 | } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) { | |
2032 | /* PeerKey SMK Handshake */ | |
e6270129 | 2033 | peerkey_rx_eapol_smk(sm, src_addr, key, key_data_len, key_info, |
6fc6879b JM |
2034 | ver); |
2035 | } else { | |
2036 | if (key_info & WPA_KEY_INFO_MIC) { | |
2037 | /* 1/2 Group Key Handshake */ | |
2038 | wpa_supplicant_process_1_of_2(sm, src_addr, key, | |
e6270129 JM |
2039 | key_data, key_data_len, |
2040 | ver); | |
6fc6879b | 2041 | } else { |
f049052b BG |
2042 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
2043 | "WPA: EAPOL-Key (Group) without Mic bit - " | |
2044 | "dropped"); | |
6fc6879b JM |
2045 | } |
2046 | } | |
2047 | ||
2048 | ret = 1; | |
2049 | ||
2050 | out: | |
fbfc974c | 2051 | bin_clear_free(tmp, data_len); |
6fc6879b JM |
2052 | return ret; |
2053 | } | |
2054 | ||
2055 | ||
2056 | #ifdef CONFIG_CTRL_IFACE | |
6fc6879b JM |
2057 | static u32 wpa_key_mgmt_suite(struct wpa_sm *sm) |
2058 | { | |
2059 | switch (sm->key_mgmt) { | |
2060 | case WPA_KEY_MGMT_IEEE8021X: | |
a14896e8 JM |
2061 | return ((sm->proto == WPA_PROTO_RSN || |
2062 | sm->proto == WPA_PROTO_OSEN) ? | |
6fc6879b JM |
2063 | RSN_AUTH_KEY_MGMT_UNSPEC_802_1X : |
2064 | WPA_AUTH_KEY_MGMT_UNSPEC_802_1X); | |
2065 | case WPA_KEY_MGMT_PSK: | |
2066 | return (sm->proto == WPA_PROTO_RSN ? | |
2067 | RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X : | |
2068 | WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X); | |
2069 | #ifdef CONFIG_IEEE80211R | |
2070 | case WPA_KEY_MGMT_FT_IEEE8021X: | |
2071 | return RSN_AUTH_KEY_MGMT_FT_802_1X; | |
2072 | case WPA_KEY_MGMT_FT_PSK: | |
2073 | return RSN_AUTH_KEY_MGMT_FT_PSK; | |
2074 | #endif /* CONFIG_IEEE80211R */ | |
56586197 JM |
2075 | #ifdef CONFIG_IEEE80211W |
2076 | case WPA_KEY_MGMT_IEEE8021X_SHA256: | |
2077 | return RSN_AUTH_KEY_MGMT_802_1X_SHA256; | |
2078 | case WPA_KEY_MGMT_PSK_SHA256: | |
2079 | return RSN_AUTH_KEY_MGMT_PSK_SHA256; | |
2080 | #endif /* CONFIG_IEEE80211W */ | |
369c8d7b JM |
2081 | case WPA_KEY_MGMT_CCKM: |
2082 | return (sm->proto == WPA_PROTO_RSN ? | |
2083 | RSN_AUTH_KEY_MGMT_CCKM: | |
2084 | WPA_AUTH_KEY_MGMT_CCKM); | |
6fc6879b JM |
2085 | case WPA_KEY_MGMT_WPA_NONE: |
2086 | return WPA_AUTH_KEY_MGMT_NONE; | |
666497c8 JM |
2087 | case WPA_KEY_MGMT_IEEE8021X_SUITE_B: |
2088 | return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B; | |
5e3b5197 JM |
2089 | case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192: |
2090 | return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192; | |
6fc6879b JM |
2091 | default: |
2092 | return 0; | |
2093 | } | |
2094 | } | |
2095 | ||
2096 | ||
6fc6879b JM |
2097 | #define RSN_SUITE "%02x-%02x-%02x-%d" |
2098 | #define RSN_SUITE_ARG(s) \ | |
2099 | ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff | |
2100 | ||
2101 | /** | |
2102 | * wpa_sm_get_mib - Dump text list of MIB entries | |
2103 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2104 | * @buf: Buffer for the list | |
2105 | * @buflen: Length of the buffer | |
2106 | * Returns: Number of bytes written to buffer | |
2107 | * | |
2108 | * This function is used fetch dot11 MIB variables. | |
2109 | */ | |
2110 | int wpa_sm_get_mib(struct wpa_sm *sm, char *buf, size_t buflen) | |
2111 | { | |
2112 | char pmkid_txt[PMKID_LEN * 2 + 1]; | |
2113 | int rsna, ret; | |
2114 | size_t len; | |
2115 | ||
2116 | if (sm->cur_pmksa) { | |
2117 | wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt), | |
2118 | sm->cur_pmksa->pmkid, PMKID_LEN); | |
2119 | } else | |
2120 | pmkid_txt[0] = '\0'; | |
2121 | ||
56586197 JM |
2122 | if ((wpa_key_mgmt_wpa_psk(sm->key_mgmt) || |
2123 | wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt)) && | |
6fc6879b JM |
2124 | sm->proto == WPA_PROTO_RSN) |
2125 | rsna = 1; | |
2126 | else | |
2127 | rsna = 0; | |
2128 | ||
2129 | ret = os_snprintf(buf, buflen, | |
2130 | "dot11RSNAOptionImplemented=TRUE\n" | |
2131 | "dot11RSNAPreauthenticationImplemented=TRUE\n" | |
2132 | "dot11RSNAEnabled=%s\n" | |
2133 | "dot11RSNAPreauthenticationEnabled=%s\n" | |
2134 | "dot11RSNAConfigVersion=%d\n" | |
2135 | "dot11RSNAConfigPairwiseKeysSupported=5\n" | |
2136 | "dot11RSNAConfigGroupCipherSize=%d\n" | |
2137 | "dot11RSNAConfigPMKLifetime=%d\n" | |
2138 | "dot11RSNAConfigPMKReauthThreshold=%d\n" | |
2139 | "dot11RSNAConfigNumberOfPTKSAReplayCounters=1\n" | |
2140 | "dot11RSNAConfigSATimeout=%d\n", | |
2141 | rsna ? "TRUE" : "FALSE", | |
2142 | rsna ? "TRUE" : "FALSE", | |
2143 | RSN_VERSION, | |
c3550295 | 2144 | wpa_cipher_key_len(sm->group_cipher) * 8, |
6fc6879b JM |
2145 | sm->dot11RSNAConfigPMKLifetime, |
2146 | sm->dot11RSNAConfigPMKReauthThreshold, | |
2147 | sm->dot11RSNAConfigSATimeout); | |
d85e1fc8 | 2148 | if (os_snprintf_error(buflen, ret)) |
6fc6879b JM |
2149 | return 0; |
2150 | len = ret; | |
2151 | ||
2152 | ret = os_snprintf( | |
2153 | buf + len, buflen - len, | |
2154 | "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n" | |
2155 | "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n" | |
2156 | "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n" | |
2157 | "dot11RSNAPMKIDUsed=%s\n" | |
2158 | "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n" | |
2159 | "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n" | |
2160 | "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n" | |
2161 | "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n" | |
2162 | "dot11RSNA4WayHandshakeFailures=%u\n", | |
2163 | RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)), | |
c3550295 JM |
2164 | RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, |
2165 | sm->pairwise_cipher)), | |
2166 | RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, | |
2167 | sm->group_cipher)), | |
6fc6879b JM |
2168 | pmkid_txt, |
2169 | RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)), | |
c3550295 JM |
2170 | RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, |
2171 | sm->pairwise_cipher)), | |
2172 | RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, | |
2173 | sm->group_cipher)), | |
6fc6879b | 2174 | sm->dot11RSNA4WayHandshakeFailures); |
1f102d3b | 2175 | if (!os_snprintf_error(buflen - len, ret)) |
6fc6879b JM |
2176 | len += ret; |
2177 | ||
2178 | return (int) len; | |
2179 | } | |
2180 | #endif /* CONFIG_CTRL_IFACE */ | |
2181 | ||
2182 | ||
2183 | static void wpa_sm_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry, | |
6aaac006 | 2184 | void *ctx, enum pmksa_free_reason reason) |
6fc6879b JM |
2185 | { |
2186 | struct wpa_sm *sm = ctx; | |
6aaac006 | 2187 | int deauth = 0; |
6fc6879b | 2188 | |
6aaac006 DW |
2189 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: PMKSA cache entry free_cb: " |
2190 | MACSTR " reason=%d", MAC2STR(entry->aa), reason); | |
2191 | ||
2192 | if (sm->cur_pmksa == entry) { | |
2193 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
2194 | "RSN: %s current PMKSA entry", | |
2195 | reason == PMKSA_REPLACE ? "replaced" : "removed"); | |
2196 | pmksa_cache_clear_current(sm); | |
2197 | ||
2198 | /* | |
2199 | * If an entry is simply being replaced, there's no need to | |
2200 | * deauthenticate because it will be immediately re-added. | |
2201 | * This happens when EAP authentication is completed again | |
2202 | * (reauth or failed PMKSA caching attempt). | |
2203 | */ | |
2204 | if (reason != PMKSA_REPLACE) | |
2205 | deauth = 1; | |
2206 | } | |
2207 | ||
2208 | if (reason == PMKSA_EXPIRE && | |
6fc6879b JM |
2209 | (sm->pmk_len == entry->pmk_len && |
2210 | os_memcmp(sm->pmk, entry->pmk, sm->pmk_len) == 0)) { | |
f049052b | 2211 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
6aaac006 DW |
2212 | "RSN: deauthenticating due to expired PMK"); |
2213 | pmksa_cache_clear_current(sm); | |
2214 | deauth = 1; | |
2215 | } | |
6fc6879b | 2216 | |
6aaac006 | 2217 | if (deauth) { |
6fc6879b JM |
2218 | os_memset(sm->pmk, 0, sizeof(sm->pmk)); |
2219 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); | |
6fc6879b JM |
2220 | } |
2221 | } | |
2222 | ||
2223 | ||
2224 | /** | |
2225 | * wpa_sm_init - Initialize WPA state machine | |
2226 | * @ctx: Context pointer for callbacks; this needs to be an allocated buffer | |
2227 | * Returns: Pointer to the allocated WPA state machine data | |
2228 | * | |
2229 | * This function is used to allocate a new WPA state machine and the returned | |
2230 | * value is passed to all WPA state machine calls. | |
2231 | */ | |
2232 | struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx) | |
2233 | { | |
2234 | struct wpa_sm *sm; | |
2235 | ||
2236 | sm = os_zalloc(sizeof(*sm)); | |
2237 | if (sm == NULL) | |
2238 | return NULL; | |
c5b26e33 | 2239 | dl_list_init(&sm->pmksa_candidates); |
6fc6879b JM |
2240 | sm->renew_snonce = 1; |
2241 | sm->ctx = ctx; | |
2242 | ||
2243 | sm->dot11RSNAConfigPMKLifetime = 43200; | |
2244 | sm->dot11RSNAConfigPMKReauthThreshold = 70; | |
2245 | sm->dot11RSNAConfigSATimeout = 60; | |
2246 | ||
2247 | sm->pmksa = pmksa_cache_init(wpa_sm_pmksa_free_cb, sm, sm); | |
2248 | if (sm->pmksa == NULL) { | |
f049052b BG |
2249 | wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, |
2250 | "RSN: PMKSA cache initialization failed"); | |
6fc6879b JM |
2251 | os_free(sm); |
2252 | return NULL; | |
2253 | } | |
2254 | ||
2255 | return sm; | |
2256 | } | |
2257 | ||
2258 | ||
2259 | /** | |
2260 | * wpa_sm_deinit - Deinitialize WPA state machine | |
2261 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2262 | */ | |
2263 | void wpa_sm_deinit(struct wpa_sm *sm) | |
2264 | { | |
2265 | if (sm == NULL) | |
2266 | return; | |
2267 | pmksa_cache_deinit(sm->pmksa); | |
2268 | eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL); | |
581a8cde | 2269 | eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); |
6fc6879b JM |
2270 | os_free(sm->assoc_wpa_ie); |
2271 | os_free(sm->ap_wpa_ie); | |
2272 | os_free(sm->ap_rsn_ie); | |
71932544 | 2273 | wpa_sm_drop_sa(sm); |
6fc6879b JM |
2274 | os_free(sm->ctx); |
2275 | peerkey_deinit(sm); | |
55046414 JM |
2276 | #ifdef CONFIG_IEEE80211R |
2277 | os_free(sm->assoc_resp_ies); | |
2278 | #endif /* CONFIG_IEEE80211R */ | |
651c6a84 JM |
2279 | #ifdef CONFIG_TESTING_OPTIONS |
2280 | wpabuf_free(sm->test_assoc_ie); | |
2281 | #endif /* CONFIG_TESTING_OPTIONS */ | |
6fc6879b JM |
2282 | os_free(sm); |
2283 | } | |
2284 | ||
2285 | ||
2286 | /** | |
2287 | * wpa_sm_notify_assoc - Notify WPA state machine about association | |
2288 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2289 | * @bssid: The BSSID of the new association | |
2290 | * | |
2291 | * This function is called to let WPA state machine know that the connection | |
2292 | * was established. | |
2293 | */ | |
2294 | void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid) | |
2295 | { | |
58a98fb0 JM |
2296 | int clear_ptk = 1; |
2297 | ||
6fc6879b JM |
2298 | if (sm == NULL) |
2299 | return; | |
2300 | ||
f049052b BG |
2301 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2302 | "WPA: Association event - clear replay counter"); | |
6fc6879b JM |
2303 | os_memcpy(sm->bssid, bssid, ETH_ALEN); |
2304 | os_memset(sm->rx_replay_counter, 0, WPA_REPLAY_COUNTER_LEN); | |
2305 | sm->rx_replay_counter_set = 0; | |
2306 | sm->renew_snonce = 1; | |
2307 | if (os_memcmp(sm->preauth_bssid, bssid, ETH_ALEN) == 0) | |
2308 | rsn_preauth_deinit(sm); | |
2309 | ||
2310 | #ifdef CONFIG_IEEE80211R | |
58a98fb0 | 2311 | if (wpa_ft_is_completed(sm)) { |
5d5a9f00 JM |
2312 | /* |
2313 | * Clear portValid to kick EAPOL state machine to re-enter | |
2314 | * AUTHENTICATED state to get the EAPOL port Authorized. | |
2315 | */ | |
2316 | eapol_sm_notify_portValid(sm->eapol, FALSE); | |
6fc6879b JM |
2317 | wpa_supplicant_key_neg_complete(sm, sm->bssid, 1); |
2318 | ||
2319 | /* Prepare for the next transition */ | |
76b7981d | 2320 | wpa_ft_prepare_auth_request(sm, NULL); |
58a98fb0 JM |
2321 | |
2322 | clear_ptk = 0; | |
6fc6879b JM |
2323 | } |
2324 | #endif /* CONFIG_IEEE80211R */ | |
58a98fb0 JM |
2325 | |
2326 | if (clear_ptk) { | |
2327 | /* | |
2328 | * IEEE 802.11, 8.4.10: Delete PTK SA on (re)association if | |
2329 | * this is not part of a Fast BSS Transition. | |
2330 | */ | |
f049052b | 2331 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PTK"); |
58a98fb0 | 2332 | sm->ptk_set = 0; |
d2c33b91 | 2333 | os_memset(&sm->ptk, 0, sizeof(sm->ptk)); |
58a98fb0 | 2334 | sm->tptk_set = 0; |
d2c33b91 | 2335 | os_memset(&sm->tptk, 0, sizeof(sm->tptk)); |
58a98fb0 | 2336 | } |
40cf22e6 JM |
2337 | |
2338 | #ifdef CONFIG_TDLS | |
2339 | wpa_tdls_assoc(sm); | |
2340 | #endif /* CONFIG_TDLS */ | |
25ef8529 JM |
2341 | |
2342 | #ifdef CONFIG_P2P | |
2343 | os_memset(sm->p2p_ip_addr, 0, sizeof(sm->p2p_ip_addr)); | |
2344 | #endif /* CONFIG_P2P */ | |
6fc6879b JM |
2345 | } |
2346 | ||
2347 | ||
2348 | /** | |
2349 | * wpa_sm_notify_disassoc - Notify WPA state machine about disassociation | |
2350 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2351 | * | |
2352 | * This function is called to let WPA state machine know that the connection | |
2353 | * was lost. This will abort any existing pre-authentication session. | |
2354 | */ | |
2355 | void wpa_sm_notify_disassoc(struct wpa_sm *sm) | |
2356 | { | |
ac8e074e JM |
2357 | eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL); |
2358 | eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); | |
77327298 | 2359 | peerkey_deinit(sm); |
6fc6879b | 2360 | rsn_preauth_deinit(sm); |
0639970d | 2361 | pmksa_cache_clear_current(sm); |
6fc6879b JM |
2362 | if (wpa_sm_get_state(sm) == WPA_4WAY_HANDSHAKE) |
2363 | sm->dot11RSNA4WayHandshakeFailures++; | |
40cf22e6 JM |
2364 | #ifdef CONFIG_TDLS |
2365 | wpa_tdls_disassoc(sm); | |
2366 | #endif /* CONFIG_TDLS */ | |
71932544 JM |
2367 | |
2368 | /* Keys are not needed in the WPA state machine anymore */ | |
2369 | wpa_sm_drop_sa(sm); | |
761396e4 JM |
2370 | |
2371 | sm->msg_3_of_4_ok = 0; | |
6fc6879b JM |
2372 | } |
2373 | ||
2374 | ||
2375 | /** | |
2376 | * wpa_sm_set_pmk - Set PMK | |
2377 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2378 | * @pmk: The new PMK | |
2379 | * @pmk_len: The length of the new PMK in bytes | |
70c93963 | 2380 | * @pmkid: Calculated PMKID |
bc26ac50 | 2381 | * @bssid: AA to add into PMKSA cache or %NULL to not cache the PMK |
6fc6879b JM |
2382 | * |
2383 | * Configure the PMK for WPA state machine. | |
2384 | */ | |
bc26ac50 | 2385 | void wpa_sm_set_pmk(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len, |
70c93963 | 2386 | const u8 *pmkid, const u8 *bssid) |
6fc6879b JM |
2387 | { |
2388 | if (sm == NULL) | |
2389 | return; | |
2390 | ||
2391 | sm->pmk_len = pmk_len; | |
2392 | os_memcpy(sm->pmk, pmk, pmk_len); | |
2393 | ||
2394 | #ifdef CONFIG_IEEE80211R | |
2395 | /* Set XXKey to be PSK for FT key derivation */ | |
2396 | sm->xxkey_len = pmk_len; | |
2397 | os_memcpy(sm->xxkey, pmk, pmk_len); | |
2398 | #endif /* CONFIG_IEEE80211R */ | |
bc26ac50 JM |
2399 | |
2400 | if (bssid) { | |
70c93963 | 2401 | pmksa_cache_add(sm->pmksa, pmk, pmk_len, pmkid, NULL, 0, |
087a1f4e | 2402 | bssid, sm->own_addr, |
bc26ac50 JM |
2403 | sm->network_ctx, sm->key_mgmt); |
2404 | } | |
6fc6879b JM |
2405 | } |
2406 | ||
2407 | ||
2408 | /** | |
2409 | * wpa_sm_set_pmk_from_pmksa - Set PMK based on the current PMKSA | |
2410 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2411 | * | |
2412 | * Take the PMK from the current PMKSA into use. If no PMKSA is active, the PMK | |
2413 | * will be cleared. | |
2414 | */ | |
2415 | void wpa_sm_set_pmk_from_pmksa(struct wpa_sm *sm) | |
2416 | { | |
2417 | if (sm == NULL) | |
2418 | return; | |
2419 | ||
2420 | if (sm->cur_pmksa) { | |
2421 | sm->pmk_len = sm->cur_pmksa->pmk_len; | |
2422 | os_memcpy(sm->pmk, sm->cur_pmksa->pmk, sm->pmk_len); | |
2423 | } else { | |
2424 | sm->pmk_len = PMK_LEN; | |
2425 | os_memset(sm->pmk, 0, PMK_LEN); | |
2426 | } | |
2427 | } | |
2428 | ||
2429 | ||
2430 | /** | |
2431 | * wpa_sm_set_fast_reauth - Set fast reauthentication (EAP) enabled/disabled | |
2432 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2433 | * @fast_reauth: Whether fast reauthentication (EAP) is allowed | |
2434 | */ | |
2435 | void wpa_sm_set_fast_reauth(struct wpa_sm *sm, int fast_reauth) | |
2436 | { | |
2437 | if (sm) | |
2438 | sm->fast_reauth = fast_reauth; | |
2439 | } | |
2440 | ||
2441 | ||
2442 | /** | |
2443 | * wpa_sm_set_scard_ctx - Set context pointer for smartcard callbacks | |
2444 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2445 | * @scard_ctx: Context pointer for smartcard related callback functions | |
2446 | */ | |
2447 | void wpa_sm_set_scard_ctx(struct wpa_sm *sm, void *scard_ctx) | |
2448 | { | |
2449 | if (sm == NULL) | |
2450 | return; | |
2451 | sm->scard_ctx = scard_ctx; | |
2452 | if (sm->preauth_eapol) | |
2453 | eapol_sm_register_scard_ctx(sm->preauth_eapol, scard_ctx); | |
2454 | } | |
2455 | ||
2456 | ||
2457 | /** | |
2458 | * wpa_sm_set_config - Notification of current configration change | |
2459 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2460 | * @config: Pointer to current network configuration | |
2461 | * | |
2462 | * Notify WPA state machine that configuration has changed. config will be | |
2463 | * stored as a backpointer to network configuration. This can be %NULL to clear | |
2464 | * the stored pointed. | |
2465 | */ | |
2466 | void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config) | |
2467 | { | |
2468 | if (!sm) | |
2469 | return; | |
2470 | ||
6fc6879b | 2471 | if (config) { |
886a807f | 2472 | sm->network_ctx = config->network_ctx; |
6fc6879b JM |
2473 | sm->peerkey_enabled = config->peerkey_enabled; |
2474 | sm->allowed_pairwise_cipher = config->allowed_pairwise_cipher; | |
2475 | sm->proactive_key_caching = config->proactive_key_caching; | |
2476 | sm->eap_workaround = config->eap_workaround; | |
2477 | sm->eap_conf_ctx = config->eap_conf_ctx; | |
2478 | if (config->ssid) { | |
2479 | os_memcpy(sm->ssid, config->ssid, config->ssid_len); | |
2480 | sm->ssid_len = config->ssid_len; | |
2481 | } else | |
2482 | sm->ssid_len = 0; | |
581a8cde | 2483 | sm->wpa_ptk_rekey = config->wpa_ptk_rekey; |
25ef8529 | 2484 | sm->p2p = config->p2p; |
73ed03f3 | 2485 | sm->wpa_rsc_relaxation = config->wpa_rsc_relaxation; |
6fc6879b | 2486 | } else { |
886a807f | 2487 | sm->network_ctx = NULL; |
6fc6879b JM |
2488 | sm->peerkey_enabled = 0; |
2489 | sm->allowed_pairwise_cipher = 0; | |
2490 | sm->proactive_key_caching = 0; | |
2491 | sm->eap_workaround = 0; | |
2492 | sm->eap_conf_ctx = NULL; | |
2493 | sm->ssid_len = 0; | |
581a8cde | 2494 | sm->wpa_ptk_rekey = 0; |
25ef8529 | 2495 | sm->p2p = 0; |
73ed03f3 | 2496 | sm->wpa_rsc_relaxation = 0; |
6fc6879b | 2497 | } |
6fc6879b JM |
2498 | } |
2499 | ||
2500 | ||
2501 | /** | |
2502 | * wpa_sm_set_own_addr - Set own MAC address | |
2503 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2504 | * @addr: Own MAC address | |
2505 | */ | |
2506 | void wpa_sm_set_own_addr(struct wpa_sm *sm, const u8 *addr) | |
2507 | { | |
2508 | if (sm) | |
2509 | os_memcpy(sm->own_addr, addr, ETH_ALEN); | |
2510 | } | |
2511 | ||
2512 | ||
2513 | /** | |
2514 | * wpa_sm_set_ifname - Set network interface name | |
2515 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2516 | * @ifname: Interface name | |
2517 | * @bridge_ifname: Optional bridge interface name (for pre-auth) | |
2518 | */ | |
2519 | void wpa_sm_set_ifname(struct wpa_sm *sm, const char *ifname, | |
2520 | const char *bridge_ifname) | |
2521 | { | |
2522 | if (sm) { | |
2523 | sm->ifname = ifname; | |
2524 | sm->bridge_ifname = bridge_ifname; | |
2525 | } | |
2526 | } | |
2527 | ||
2528 | ||
2529 | /** | |
2530 | * wpa_sm_set_eapol - Set EAPOL state machine pointer | |
2531 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2532 | * @eapol: Pointer to EAPOL state machine allocated with eapol_sm_init() | |
2533 | */ | |
2534 | void wpa_sm_set_eapol(struct wpa_sm *sm, struct eapol_sm *eapol) | |
2535 | { | |
2536 | if (sm) | |
2537 | sm->eapol = eapol; | |
2538 | } | |
2539 | ||
2540 | ||
2541 | /** | |
2542 | * wpa_sm_set_param - Set WPA state machine parameters | |
2543 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2544 | * @param: Parameter field | |
2545 | * @value: Parameter value | |
2546 | * Returns: 0 on success, -1 on failure | |
2547 | */ | |
2548 | int wpa_sm_set_param(struct wpa_sm *sm, enum wpa_sm_conf_params param, | |
2549 | unsigned int value) | |
2550 | { | |
2551 | int ret = 0; | |
2552 | ||
2553 | if (sm == NULL) | |
2554 | return -1; | |
2555 | ||
2556 | switch (param) { | |
2557 | case RSNA_PMK_LIFETIME: | |
2558 | if (value > 0) | |
2559 | sm->dot11RSNAConfigPMKLifetime = value; | |
2560 | else | |
2561 | ret = -1; | |
2562 | break; | |
2563 | case RSNA_PMK_REAUTH_THRESHOLD: | |
2564 | if (value > 0 && value <= 100) | |
2565 | sm->dot11RSNAConfigPMKReauthThreshold = value; | |
2566 | else | |
2567 | ret = -1; | |
2568 | break; | |
2569 | case RSNA_SA_TIMEOUT: | |
2570 | if (value > 0) | |
2571 | sm->dot11RSNAConfigSATimeout = value; | |
2572 | else | |
2573 | ret = -1; | |
2574 | break; | |
2575 | case WPA_PARAM_PROTO: | |
2576 | sm->proto = value; | |
2577 | break; | |
2578 | case WPA_PARAM_PAIRWISE: | |
2579 | sm->pairwise_cipher = value; | |
2580 | break; | |
2581 | case WPA_PARAM_GROUP: | |
2582 | sm->group_cipher = value; | |
2583 | break; | |
2584 | case WPA_PARAM_KEY_MGMT: | |
2585 | sm->key_mgmt = value; | |
2586 | break; | |
2587 | #ifdef CONFIG_IEEE80211W | |
2588 | case WPA_PARAM_MGMT_GROUP: | |
2589 | sm->mgmt_group_cipher = value; | |
2590 | break; | |
2591 | #endif /* CONFIG_IEEE80211W */ | |
2592 | case WPA_PARAM_RSN_ENABLED: | |
2593 | sm->rsn_enabled = value; | |
2594 | break; | |
e820cf95 JM |
2595 | case WPA_PARAM_MFP: |
2596 | sm->mfp = value; | |
2597 | break; | |
6fc6879b JM |
2598 | default: |
2599 | break; | |
2600 | } | |
2601 | ||
2602 | return ret; | |
2603 | } | |
2604 | ||
2605 | ||
6fc6879b JM |
2606 | /** |
2607 | * wpa_sm_get_status - Get WPA state machine | |
2608 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2609 | * @buf: Buffer for status information | |
2610 | * @buflen: Maximum buffer length | |
2611 | * @verbose: Whether to include verbose status information | |
2612 | * Returns: Number of bytes written to buf. | |
2613 | * | |
2614 | * Query WPA state machine for status information. This function fills in | |
2615 | * a text area with current status information. If the buffer (buf) is not | |
2616 | * large enough, status information will be truncated to fit the buffer. | |
2617 | */ | |
2618 | int wpa_sm_get_status(struct wpa_sm *sm, char *buf, size_t buflen, | |
2619 | int verbose) | |
2620 | { | |
2621 | char *pos = buf, *end = buf + buflen; | |
2622 | int ret; | |
2623 | ||
2624 | ret = os_snprintf(pos, end - pos, | |
2625 | "pairwise_cipher=%s\n" | |
2626 | "group_cipher=%s\n" | |
2627 | "key_mgmt=%s\n", | |
2628 | wpa_cipher_txt(sm->pairwise_cipher), | |
2629 | wpa_cipher_txt(sm->group_cipher), | |
2630 | wpa_key_mgmt_txt(sm->key_mgmt, sm->proto)); | |
d85e1fc8 | 2631 | if (os_snprintf_error(end - pos, ret)) |
6fc6879b JM |
2632 | return pos - buf; |
2633 | pos += ret; | |
13e1d2e2 JM |
2634 | |
2635 | if (sm->mfp != NO_MGMT_FRAME_PROTECTION && sm->ap_rsn_ie) { | |
2636 | struct wpa_ie_data rsn; | |
2637 | if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) | |
2638 | >= 0 && | |
2639 | rsn.capabilities & (WPA_CAPABILITY_MFPR | | |
2640 | WPA_CAPABILITY_MFPC)) { | |
2641 | ret = os_snprintf(pos, end - pos, "pmf=%d\n", | |
2642 | (rsn.capabilities & | |
2643 | WPA_CAPABILITY_MFPR) ? 2 : 1); | |
d85e1fc8 | 2644 | if (os_snprintf_error(end - pos, ret)) |
13e1d2e2 JM |
2645 | return pos - buf; |
2646 | pos += ret; | |
2647 | } | |
2648 | } | |
2649 | ||
6fc6879b JM |
2650 | return pos - buf; |
2651 | } | |
2652 | ||
2653 | ||
ae8535b6 JM |
2654 | int wpa_sm_pmf_enabled(struct wpa_sm *sm) |
2655 | { | |
2656 | struct wpa_ie_data rsn; | |
2657 | ||
2658 | if (sm->mfp == NO_MGMT_FRAME_PROTECTION || !sm->ap_rsn_ie) | |
2659 | return 0; | |
2660 | ||
2661 | if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) >= 0 && | |
2662 | rsn.capabilities & (WPA_CAPABILITY_MFPR | WPA_CAPABILITY_MFPC)) | |
2663 | return 1; | |
2664 | ||
2665 | return 0; | |
2666 | } | |
2667 | ||
2668 | ||
6fc6879b JM |
2669 | /** |
2670 | * wpa_sm_set_assoc_wpa_ie_default - Generate own WPA/RSN IE from configuration | |
2671 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2672 | * @wpa_ie: Pointer to buffer for WPA/RSN IE | |
2673 | * @wpa_ie_len: Pointer to the length of the wpa_ie buffer | |
2674 | * Returns: 0 on success, -1 on failure | |
2675 | */ | |
2676 | int wpa_sm_set_assoc_wpa_ie_default(struct wpa_sm *sm, u8 *wpa_ie, | |
2677 | size_t *wpa_ie_len) | |
2678 | { | |
2679 | int res; | |
2680 | ||
2681 | if (sm == NULL) | |
2682 | return -1; | |
2683 | ||
651c6a84 JM |
2684 | #ifdef CONFIG_TESTING_OPTIONS |
2685 | if (sm->test_assoc_ie) { | |
2686 | wpa_printf(MSG_DEBUG, | |
2687 | "TESTING: Replace association WPA/RSN IE"); | |
2688 | if (*wpa_ie_len < wpabuf_len(sm->test_assoc_ie)) | |
2689 | return -1; | |
2690 | os_memcpy(wpa_ie, wpabuf_head(sm->test_assoc_ie), | |
2691 | wpabuf_len(sm->test_assoc_ie)); | |
2692 | res = wpabuf_len(sm->test_assoc_ie); | |
2693 | } else | |
2694 | #endif /* CONFIG_TESTING_OPTIONS */ | |
6fc6879b JM |
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 | } | |
651c6a84 JM |
3034 | |
3035 | ||
3036 | #ifdef CONFIG_TESTING_OPTIONS | |
3037 | void wpa_sm_set_test_assoc_ie(struct wpa_sm *sm, struct wpabuf *buf) | |
3038 | { | |
3039 | wpabuf_free(sm->test_assoc_ie); | |
3040 | sm->test_assoc_ie = buf; | |
3041 | } | |
3042 | #endif /* CONFIG_TESTING_OPTIONS */ |