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Commit | Line | Data |
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6fc6879b JM |
1 | /* |
2 | * WPA Supplicant - WPA state machine and EAPOL-Key processing | |
a3e18dbb | 3 | * Copyright (c) 2003-2018, 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" | |
2022f1d0 | 13 | #include "crypto/aes.h" |
03da66bd JM |
14 | #include "crypto/aes_wrap.h" |
15 | #include "crypto/crypto.h" | |
3642c431 | 16 | #include "crypto/random.h" |
2022f1d0 | 17 | #include "crypto/aes_siv.h" |
0a614799 | 18 | #include "crypto/sha256.h" |
ec9f4837 JM |
19 | #include "crypto/sha384.h" |
20 | #include "crypto/sha512.h" | |
03da66bd | 21 | #include "common/ieee802_11_defs.h" |
a6609937 | 22 | #include "common/ieee802_11_common.h" |
fcd3d6ce | 23 | #include "eap_common/eap_defs.h" |
03da66bd | 24 | #include "eapol_supp/eapol_supp_sm.h" |
6fc6879b JM |
25 | #include "wpa.h" |
26 | #include "eloop.h" | |
6fc6879b JM |
27 | #include "preauth.h" |
28 | #include "pmksa_cache.h" | |
29 | #include "wpa_i.h" | |
30 | #include "wpa_ie.h" | |
6fc6879b JM |
31 | |
32 | ||
73ed03f3 MS |
33 | static const u8 null_rsc[8] = { 0, 0, 0, 0, 0, 0, 0, 0 }; |
34 | ||
35 | ||
6fc6879b JM |
36 | /** |
37 | * wpa_eapol_key_send - Send WPA/RSN EAPOL-Key message | |
38 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
1049af7e | 39 | * @ptk: PTK for Key Confirmation/Encryption Key |
6fc6879b JM |
40 | * @ver: Version field from Key Info |
41 | * @dest: Destination address for the frame | |
42 | * @proto: Ethertype (usually ETH_P_EAPOL) | |
43 | * @msg: EAPOL-Key message | |
44 | * @msg_len: Length of message | |
45 | * @key_mic: Pointer to the buffer to which the EAPOL-Key MIC is written | |
c93b7e18 | 46 | * Returns: >= 0 on success, < 0 on failure |
6fc6879b | 47 | */ |
1049af7e | 48 | int wpa_eapol_key_send(struct wpa_sm *sm, struct wpa_ptk *ptk, |
c93b7e18 AA |
49 | int ver, const u8 *dest, u16 proto, |
50 | u8 *msg, size_t msg_len, u8 *key_mic) | |
6fc6879b | 51 | { |
c93b7e18 | 52 | int ret = -1; |
567da5bb | 53 | size_t mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len); |
98cd3d1c | 54 | |
ef9627cb JM |
55 | wpa_printf(MSG_DEBUG, "WPA: Send EAPOL-Key frame to " MACSTR |
56 | " ver=%d mic_len=%d key_mgmt=0x%x", | |
57 | MAC2STR(dest), ver, (int) mic_len, sm->key_mgmt); | |
a8e16edc | 58 | if (is_zero_ether_addr(dest) && is_zero_ether_addr(sm->bssid)) { |
6fc6879b JM |
59 | /* |
60 | * Association event was not yet received; try to fetch | |
61 | * BSSID from the driver. | |
62 | */ | |
63 | if (wpa_sm_get_bssid(sm, sm->bssid) < 0) { | |
f049052b BG |
64 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
65 | "WPA: Failed to read BSSID for " | |
66 | "EAPOL-Key destination address"); | |
6fc6879b JM |
67 | } else { |
68 | dest = sm->bssid; | |
f049052b BG |
69 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
70 | "WPA: Use BSSID (" MACSTR | |
71 | ") as the destination for EAPOL-Key", | |
72 | MAC2STR(dest)); | |
6fc6879b JM |
73 | } |
74 | } | |
2022f1d0 JM |
75 | |
76 | if (mic_len) { | |
77 | if (key_mic && (!ptk || !ptk->kck_len)) | |
78 | goto out; | |
79 | ||
80 | if (key_mic && | |
81 | wpa_eapol_key_mic(ptk->kck, ptk->kck_len, sm->key_mgmt, ver, | |
82 | msg, msg_len, key_mic)) { | |
83 | wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, | |
84 | "WPA: Failed to generate EAPOL-Key version %d key_mgmt 0x%x MIC", | |
85 | ver, sm->key_mgmt); | |
86 | goto out; | |
87 | } | |
28fb9bb1 JM |
88 | if (ptk) |
89 | wpa_hexdump_key(MSG_DEBUG, "WPA: KCK", | |
90 | ptk->kck, ptk->kck_len); | |
2022f1d0 JM |
91 | wpa_hexdump(MSG_DEBUG, "WPA: Derived Key MIC", |
92 | key_mic, mic_len); | |
93 | } else { | |
94 | #ifdef CONFIG_FILS | |
95 | /* AEAD cipher - Key MIC field not used */ | |
96 | struct ieee802_1x_hdr *s_hdr, *hdr; | |
97 | struct wpa_eapol_key *s_key, *key; | |
98 | u8 *buf, *s_key_data, *key_data; | |
99 | size_t buf_len = msg_len + AES_BLOCK_SIZE; | |
100 | size_t key_data_len; | |
101 | u16 eapol_len; | |
102 | const u8 *aad[1]; | |
103 | size_t aad_len[1]; | |
104 | ||
105 | if (!ptk || !ptk->kek_len) | |
106 | goto out; | |
107 | ||
108 | key_data_len = msg_len - sizeof(struct ieee802_1x_hdr) - | |
109 | sizeof(struct wpa_eapol_key) - 2; | |
110 | ||
111 | buf = os_malloc(buf_len); | |
112 | if (!buf) | |
113 | goto out; | |
114 | ||
115 | os_memcpy(buf, msg, msg_len); | |
116 | hdr = (struct ieee802_1x_hdr *) buf; | |
117 | key = (struct wpa_eapol_key *) (hdr + 1); | |
118 | key_data = ((u8 *) (key + 1)) + 2; | |
119 | ||
120 | /* Update EAPOL header to include AES-SIV overhead */ | |
121 | eapol_len = be_to_host16(hdr->length); | |
122 | eapol_len += AES_BLOCK_SIZE; | |
123 | hdr->length = host_to_be16(eapol_len); | |
124 | ||
125 | /* Update Key Data Length field to include AES-SIV overhead */ | |
126 | WPA_PUT_BE16((u8 *) (key + 1), AES_BLOCK_SIZE + key_data_len); | |
127 | ||
128 | s_hdr = (struct ieee802_1x_hdr *) msg; | |
129 | s_key = (struct wpa_eapol_key *) (s_hdr + 1); | |
130 | s_key_data = ((u8 *) (s_key + 1)) + 2; | |
131 | ||
132 | wpa_hexdump_key(MSG_DEBUG, "WPA: Plaintext Key Data", | |
133 | s_key_data, key_data_len); | |
134 | ||
135 | wpa_hexdump_key(MSG_DEBUG, "WPA: KEK", ptk->kek, ptk->kek_len); | |
136 | /* AES-SIV AAD from EAPOL protocol version field (inclusive) to | |
137 | * to Key Data (exclusive). */ | |
138 | aad[0] = buf; | |
139 | aad_len[0] = key_data - buf; | |
140 | if (aes_siv_encrypt(ptk->kek, ptk->kek_len, | |
141 | s_key_data, key_data_len, | |
142 | 1, aad, aad_len, key_data) < 0) { | |
143 | os_free(buf); | |
144 | goto out; | |
145 | } | |
146 | ||
147 | wpa_hexdump(MSG_DEBUG, "WPA: Encrypted Key Data from SIV", | |
148 | key_data, AES_BLOCK_SIZE + key_data_len); | |
149 | ||
150 | os_free(msg); | |
151 | msg = buf; | |
152 | msg_len = buf_len; | |
153 | #else /* CONFIG_FILS */ | |
04b6b3ed | 154 | goto out; |
2022f1d0 | 155 | #endif /* CONFIG_FILS */ |
04b6b3ed | 156 | } |
2022f1d0 | 157 | |
6fc6879b | 158 | wpa_hexdump(MSG_MSGDUMP, "WPA: TX EAPOL-Key", msg, msg_len); |
c93b7e18 | 159 | ret = wpa_sm_ether_send(sm, dest, proto, msg, msg_len); |
6fc6879b | 160 | eapol_sm_notify_tx_eapol_key(sm->eapol); |
04b6b3ed | 161 | out: |
6fc6879b | 162 | os_free(msg); |
c93b7e18 | 163 | return ret; |
6fc6879b JM |
164 | } |
165 | ||
166 | ||
167 | /** | |
168 | * wpa_sm_key_request - Send EAPOL-Key Request | |
169 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
170 | * @error: Indicate whether this is an Michael MIC error report | |
171 | * @pairwise: 1 = error report for pairwise packet, 0 = for group packet | |
6fc6879b JM |
172 | * |
173 | * Send an EAPOL-Key Request to the current authenticator. This function is | |
174 | * used to request rekeying and it is usually called when a local Michael MIC | |
175 | * failure is detected. | |
176 | */ | |
177 | void wpa_sm_key_request(struct wpa_sm *sm, int error, int pairwise) | |
178 | { | |
5e3b5197 | 179 | size_t mic_len, hdrlen, rlen; |
6fc6879b JM |
180 | struct wpa_eapol_key *reply; |
181 | int key_info, ver; | |
6d014ffc | 182 | u8 bssid[ETH_ALEN], *rbuf, *key_mic, *mic; |
6fc6879b | 183 | |
4bc801ab | 184 | if (wpa_use_akm_defined(sm->key_mgmt)) |
df0f01d9 JM |
185 | ver = WPA_KEY_INFO_TYPE_AKM_DEFINED; |
186 | else if (wpa_key_mgmt_ft(sm->key_mgmt) || | |
187 | wpa_key_mgmt_sha256(sm->key_mgmt)) | |
6fc6879b | 188 | ver = WPA_KEY_INFO_TYPE_AES_128_CMAC; |
eb7719ff | 189 | else if (sm->pairwise_cipher != WPA_CIPHER_TKIP) |
6fc6879b JM |
190 | ver = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES; |
191 | else | |
192 | ver = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4; | |
193 | ||
194 | if (wpa_sm_get_bssid(sm, bssid) < 0) { | |
f049052b BG |
195 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
196 | "Failed to read BSSID for EAPOL-Key request"); | |
6fc6879b JM |
197 | return; |
198 | } | |
199 | ||
567da5bb | 200 | mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len); |
6d014ffc | 201 | hdrlen = sizeof(*reply) + mic_len + 2; |
6fc6879b | 202 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, |
5e3b5197 | 203 | hdrlen, &rlen, (void *) &reply); |
6fc6879b JM |
204 | if (rbuf == NULL) |
205 | return; | |
206 | ||
a14896e8 JM |
207 | reply->type = (sm->proto == WPA_PROTO_RSN || |
208 | sm->proto == WPA_PROTO_OSEN) ? | |
6fc6879b JM |
209 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; |
210 | key_info = WPA_KEY_INFO_REQUEST | ver; | |
211 | if (sm->ptk_set) | |
4a26ccda JM |
212 | key_info |= WPA_KEY_INFO_SECURE; |
213 | if (sm->ptk_set && mic_len) | |
214 | key_info |= WPA_KEY_INFO_MIC; | |
6fc6879b JM |
215 | if (error) |
216 | key_info |= WPA_KEY_INFO_ERROR; | |
217 | if (pairwise) | |
218 | key_info |= WPA_KEY_INFO_KEY_TYPE; | |
219 | WPA_PUT_BE16(reply->key_info, key_info); | |
220 | WPA_PUT_BE16(reply->key_length, 0); | |
221 | os_memcpy(reply->replay_counter, sm->request_counter, | |
222 | WPA_REPLAY_COUNTER_LEN); | |
223 | inc_byte_array(sm->request_counter, WPA_REPLAY_COUNTER_LEN); | |
224 | ||
6d014ffc JM |
225 | mic = (u8 *) (reply + 1); |
226 | WPA_PUT_BE16(mic + mic_len, 0); | |
5e3b5197 JM |
227 | if (!(key_info & WPA_KEY_INFO_MIC)) |
228 | key_mic = NULL; | |
229 | else | |
6d014ffc | 230 | key_mic = mic; |
6fc6879b | 231 | |
f049052b BG |
232 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
233 | "WPA: Sending EAPOL-Key Request (error=%d " | |
234 | "pairwise=%d ptk_set=%d len=%lu)", | |
235 | error, pairwise, sm->ptk_set, (unsigned long) rlen); | |
1049af7e JM |
236 | wpa_eapol_key_send(sm, &sm->ptk, ver, bssid, ETH_P_EAPOL, rbuf, rlen, |
237 | key_mic); | |
6fc6879b JM |
238 | } |
239 | ||
240 | ||
b41f2684 CL |
241 | static void wpa_supplicant_key_mgmt_set_pmk(struct wpa_sm *sm) |
242 | { | |
243 | #ifdef CONFIG_IEEE80211R | |
244 | if (sm->key_mgmt == WPA_KEY_MGMT_FT_IEEE8021X) { | |
245 | if (wpa_sm_key_mgmt_set_pmk(sm, sm->xxkey, sm->xxkey_len)) | |
246 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
247 | "RSN: Cannot set low order 256 bits of MSK for key management offload"); | |
248 | } else { | |
249 | #endif /* CONFIG_IEEE80211R */ | |
250 | if (wpa_sm_key_mgmt_set_pmk(sm, sm->pmk, sm->pmk_len)) | |
251 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
252 | "RSN: Cannot set PMK for key management offload"); | |
253 | #ifdef CONFIG_IEEE80211R | |
254 | } | |
255 | #endif /* CONFIG_IEEE80211R */ | |
256 | } | |
257 | ||
258 | ||
6fc6879b JM |
259 | static int wpa_supplicant_get_pmk(struct wpa_sm *sm, |
260 | const unsigned char *src_addr, | |
261 | const u8 *pmkid) | |
262 | { | |
263 | int abort_cached = 0; | |
264 | ||
265 | if (pmkid && !sm->cur_pmksa) { | |
266 | /* When using drivers that generate RSN IE, wpa_supplicant may | |
267 | * not have enough time to get the association information | |
268 | * event before receiving this 1/4 message, so try to find a | |
269 | * matching PMKSA cache entry here. */ | |
96efeeb6 | 270 | sm->cur_pmksa = pmksa_cache_get(sm->pmksa, src_addr, pmkid, |
852b2f27 | 271 | NULL, 0); |
6fc6879b | 272 | if (sm->cur_pmksa) { |
f049052b BG |
273 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
274 | "RSN: found matching PMKID from PMKSA cache"); | |
6fc6879b | 275 | } else { |
f049052b BG |
276 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
277 | "RSN: no matching PMKID found"); | |
6fc6879b JM |
278 | abort_cached = 1; |
279 | } | |
280 | } | |
281 | ||
282 | if (pmkid && sm->cur_pmksa && | |
0d15b69f | 283 | os_memcmp_const(pmkid, sm->cur_pmksa->pmkid, PMKID_LEN) == 0) { |
6fc6879b JM |
284 | wpa_hexdump(MSG_DEBUG, "RSN: matched PMKID", pmkid, PMKID_LEN); |
285 | wpa_sm_set_pmk_from_pmksa(sm); | |
286 | wpa_hexdump_key(MSG_DEBUG, "RSN: PMK from PMKSA cache", | |
287 | sm->pmk, sm->pmk_len); | |
288 | eapol_sm_notify_cached(sm->eapol); | |
289 | #ifdef CONFIG_IEEE80211R | |
290 | sm->xxkey_len = 0; | |
a03f9d17 JM |
291 | #ifdef CONFIG_SAE |
292 | if (sm->key_mgmt == WPA_KEY_MGMT_FT_SAE && | |
293 | sm->pmk_len == PMK_LEN) { | |
294 | /* Need to allow FT key derivation to proceed with | |
295 | * PMK from SAE being used as the XXKey in cases where | |
296 | * the PMKID in msg 1/4 matches the PMKSA entry that was | |
297 | * just added based on SAE authentication for the | |
298 | * initial mobility domain association. */ | |
299 | os_memcpy(sm->xxkey, sm->pmk, sm->pmk_len); | |
300 | sm->xxkey_len = sm->pmk_len; | |
301 | } | |
302 | #endif /* CONFIG_SAE */ | |
6fc6879b | 303 | #endif /* CONFIG_IEEE80211R */ |
56586197 | 304 | } else if (wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) && sm->eapol) { |
6fc6879b | 305 | int res, pmk_len; |
207976f0 | 306 | |
834c5d68 | 307 | if (wpa_key_mgmt_sha384(sm->key_mgmt)) |
207976f0 JM |
308 | pmk_len = PMK_LEN_SUITE_B_192; |
309 | else | |
310 | pmk_len = PMK_LEN; | |
311 | res = eapol_sm_get_key(sm->eapol, sm->pmk, pmk_len); | |
6fc6879b | 312 | if (res) { |
207976f0 JM |
313 | if (pmk_len == PMK_LEN) { |
314 | /* | |
315 | * EAP-LEAP is an exception from other EAP | |
316 | * methods: it uses only 16-byte PMK. | |
317 | */ | |
318 | res = eapol_sm_get_key(sm->eapol, sm->pmk, 16); | |
319 | pmk_len = 16; | |
320 | } | |
6fc6879b JM |
321 | } else { |
322 | #ifdef CONFIG_IEEE80211R | |
323 | u8 buf[2 * PMK_LEN]; | |
324 | if (eapol_sm_get_key(sm->eapol, buf, 2 * PMK_LEN) == 0) | |
325 | { | |
9f12271b JM |
326 | if (wpa_key_mgmt_sha384(sm->key_mgmt)) { |
327 | os_memcpy(sm->xxkey, buf, | |
328 | SHA384_MAC_LEN); | |
329 | sm->xxkey_len = SHA384_MAC_LEN; | |
330 | } else { | |
331 | os_memcpy(sm->xxkey, buf + PMK_LEN, | |
332 | PMK_LEN); | |
333 | sm->xxkey_len = PMK_LEN; | |
334 | } | |
6fc6879b JM |
335 | os_memset(buf, 0, sizeof(buf)); |
336 | } | |
337 | #endif /* CONFIG_IEEE80211R */ | |
338 | } | |
339 | if (res == 0) { | |
a7f10d65 | 340 | struct rsn_pmksa_cache_entry *sa = NULL; |
869af307 JM |
341 | const u8 *fils_cache_id = NULL; |
342 | ||
343 | #ifdef CONFIG_FILS | |
344 | if (sm->fils_cache_id_set) | |
345 | fils_cache_id = sm->fils_cache_id; | |
346 | #endif /* CONFIG_FILS */ | |
347 | ||
6fc6879b JM |
348 | wpa_hexdump_key(MSG_DEBUG, "WPA: PMK from EAPOL state " |
349 | "machines", sm->pmk, pmk_len); | |
350 | sm->pmk_len = pmk_len; | |
b41f2684 | 351 | wpa_supplicant_key_mgmt_set_pmk(sm); |
715ed737 | 352 | if (sm->proto == WPA_PROTO_RSN && |
087a1f4e | 353 | !wpa_key_mgmt_suite_b(sm->key_mgmt) && |
715ed737 | 354 | !wpa_key_mgmt_ft(sm->key_mgmt)) { |
a7f10d65 | 355 | sa = pmksa_cache_add(sm->pmksa, |
70c93963 | 356 | sm->pmk, pmk_len, NULL, |
087a1f4e | 357 | NULL, 0, |
a7f10d65 JM |
358 | src_addr, sm->own_addr, |
359 | sm->network_ctx, | |
869af307 JM |
360 | sm->key_mgmt, |
361 | fils_cache_id); | |
f5a51b58 | 362 | } |
6fc6879b | 363 | if (!sm->cur_pmksa && pmkid && |
852b2f27 JM |
364 | pmksa_cache_get(sm->pmksa, src_addr, pmkid, NULL, |
365 | 0)) { | |
f049052b BG |
366 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
367 | "RSN: the new PMK matches with the " | |
368 | "PMKID"); | |
6fc6879b | 369 | abort_cached = 0; |
bddc51e8 JM |
370 | } else if (sa && !sm->cur_pmksa && pmkid) { |
371 | /* | |
372 | * It looks like the authentication server | |
373 | * derived mismatching MSK. This should not | |
374 | * really happen, but bugs happen.. There is not | |
375 | * much we can do here without knowing what | |
376 | * exactly caused the server to misbehave. | |
377 | */ | |
62417667 | 378 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
bddc51e8 JM |
379 | "RSN: PMKID mismatch - authentication server may have derived different MSK?!"); |
380 | return -1; | |
6fc6879b | 381 | } |
a7f10d65 JM |
382 | |
383 | if (!sm->cur_pmksa) | |
384 | sm->cur_pmksa = sa; | |
6fc6879b | 385 | } else { |
0f057fb2 | 386 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
6fc6879b | 387 | "WPA: Failed to get master session key from " |
f049052b BG |
388 | "EAPOL state machines - key handshake " |
389 | "aborted"); | |
6fc6879b | 390 | if (sm->cur_pmksa) { |
f049052b BG |
391 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
392 | "RSN: Cancelled PMKSA caching " | |
393 | "attempt"); | |
6fc6879b JM |
394 | sm->cur_pmksa = NULL; |
395 | abort_cached = 1; | |
1ac2d4a9 | 396 | } else if (!abort_cached) { |
6fc6879b JM |
397 | return -1; |
398 | } | |
399 | } | |
400 | } | |
401 | ||
715ed737 | 402 | if (abort_cached && wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) && |
087a1f4e | 403 | !wpa_key_mgmt_suite_b(sm->key_mgmt) && |
a14896e8 JM |
404 | !wpa_key_mgmt_ft(sm->key_mgmt) && sm->key_mgmt != WPA_KEY_MGMT_OSEN) |
405 | { | |
6fc6879b JM |
406 | /* Send EAPOL-Start to trigger full EAP authentication. */ |
407 | u8 *buf; | |
408 | size_t buflen; | |
409 | ||
f049052b BG |
410 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
411 | "RSN: no PMKSA entry found - trigger " | |
412 | "full EAP authentication"); | |
6fc6879b JM |
413 | buf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_START, |
414 | NULL, 0, &buflen, NULL); | |
415 | if (buf) { | |
416 | wpa_sm_ether_send(sm, sm->bssid, ETH_P_EAPOL, | |
417 | buf, buflen); | |
418 | os_free(buf); | |
b4a1256d | 419 | return -2; |
6fc6879b JM |
420 | } |
421 | ||
422 | return -1; | |
423 | } | |
424 | ||
425 | return 0; | |
426 | } | |
427 | ||
428 | ||
429 | /** | |
430 | * wpa_supplicant_send_2_of_4 - Send message 2 of WPA/RSN 4-Way Handshake | |
431 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
432 | * @dst: Destination address for the frame | |
433 | * @key: Pointer to the EAPOL-Key frame header | |
434 | * @ver: Version bits from EAPOL-Key Key Info | |
435 | * @nonce: Nonce value for the EAPOL-Key frame | |
436 | * @wpa_ie: WPA/RSN IE | |
437 | * @wpa_ie_len: Length of the WPA/RSN IE | |
438 | * @ptk: PTK to use for keyed hash and encryption | |
c93b7e18 | 439 | * Returns: >= 0 on success, < 0 on failure |
6fc6879b JM |
440 | */ |
441 | int wpa_supplicant_send_2_of_4(struct wpa_sm *sm, const unsigned char *dst, | |
442 | const struct wpa_eapol_key *key, | |
443 | int ver, const u8 *nonce, | |
444 | const u8 *wpa_ie, size_t wpa_ie_len, | |
445 | struct wpa_ptk *ptk) | |
446 | { | |
5e3b5197 | 447 | size_t mic_len, hdrlen, rlen; |
6fc6879b | 448 | struct wpa_eapol_key *reply; |
5e3b5197 | 449 | u8 *rbuf, *key_mic; |
26e23750 | 450 | u8 *rsn_ie_buf = NULL; |
4a26ccda | 451 | u16 key_info; |
6fc6879b JM |
452 | |
453 | if (wpa_ie == NULL) { | |
f049052b BG |
454 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No wpa_ie set - " |
455 | "cannot generate msg 2/4"); | |
6fc6879b JM |
456 | return -1; |
457 | } | |
458 | ||
26e23750 JM |
459 | #ifdef CONFIG_IEEE80211R |
460 | if (wpa_key_mgmt_ft(sm->key_mgmt)) { | |
461 | int res; | |
462 | ||
55046414 JM |
463 | /* |
464 | * Add PMKR1Name into RSN IE (PMKID-List) and add MDIE and | |
465 | * FTIE from (Re)Association Response. | |
466 | */ | |
467 | rsn_ie_buf = os_malloc(wpa_ie_len + 2 + 2 + PMKID_LEN + | |
468 | sm->assoc_resp_ies_len); | |
26e23750 JM |
469 | if (rsn_ie_buf == NULL) |
470 | return -1; | |
471 | os_memcpy(rsn_ie_buf, wpa_ie, wpa_ie_len); | |
59e78c24 | 472 | res = wpa_insert_pmkid(rsn_ie_buf, &wpa_ie_len, |
26e23750 JM |
473 | sm->pmk_r1_name); |
474 | if (res < 0) { | |
475 | os_free(rsn_ie_buf); | |
476 | return -1; | |
477 | } | |
55046414 JM |
478 | |
479 | if (sm->assoc_resp_ies) { | |
480 | os_memcpy(rsn_ie_buf + wpa_ie_len, sm->assoc_resp_ies, | |
481 | sm->assoc_resp_ies_len); | |
482 | wpa_ie_len += sm->assoc_resp_ies_len; | |
483 | } | |
26e23750 JM |
484 | |
485 | wpa_ie = rsn_ie_buf; | |
26e23750 JM |
486 | } |
487 | #endif /* CONFIG_IEEE80211R */ | |
488 | ||
6fc6879b JM |
489 | wpa_hexdump(MSG_DEBUG, "WPA: WPA IE for msg 2/4", wpa_ie, wpa_ie_len); |
490 | ||
567da5bb | 491 | mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len); |
6d014ffc | 492 | hdrlen = sizeof(*reply) + mic_len + 2; |
6fc6879b | 493 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, |
5e3b5197 | 494 | NULL, hdrlen + wpa_ie_len, |
6fc6879b | 495 | &rlen, (void *) &reply); |
26e23750 JM |
496 | if (rbuf == NULL) { |
497 | os_free(rsn_ie_buf); | |
6fc6879b | 498 | return -1; |
26e23750 | 499 | } |
6fc6879b | 500 | |
a14896e8 JM |
501 | reply->type = (sm->proto == WPA_PROTO_RSN || |
502 | sm->proto == WPA_PROTO_OSEN) ? | |
6fc6879b | 503 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; |
4a26ccda JM |
504 | key_info = ver | WPA_KEY_INFO_KEY_TYPE; |
505 | if (mic_len) | |
506 | key_info |= WPA_KEY_INFO_MIC; | |
2022f1d0 JM |
507 | else |
508 | key_info |= WPA_KEY_INFO_ENCR_KEY_DATA; | |
4a26ccda | 509 | WPA_PUT_BE16(reply->key_info, key_info); |
a14896e8 | 510 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) |
6fc6879b JM |
511 | WPA_PUT_BE16(reply->key_length, 0); |
512 | else | |
513 | os_memcpy(reply->key_length, key->key_length, 2); | |
514 | os_memcpy(reply->replay_counter, key->replay_counter, | |
515 | WPA_REPLAY_COUNTER_LEN); | |
bc8318ac JM |
516 | wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter", reply->replay_counter, |
517 | WPA_REPLAY_COUNTER_LEN); | |
6fc6879b | 518 | |
6d014ffc JM |
519 | key_mic = (u8 *) (reply + 1); |
520 | WPA_PUT_BE16(key_mic + mic_len, wpa_ie_len); /* Key Data Length */ | |
521 | os_memcpy(key_mic + mic_len + 2, wpa_ie, wpa_ie_len); /* Key Data */ | |
26e23750 | 522 | os_free(rsn_ie_buf); |
6fc6879b JM |
523 | |
524 | os_memcpy(reply->key_nonce, nonce, WPA_NONCE_LEN); | |
525 | ||
f049052b | 526 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/4"); |
1049af7e JM |
527 | return wpa_eapol_key_send(sm, ptk, ver, dst, ETH_P_EAPOL, rbuf, rlen, |
528 | key_mic); | |
6fc6879b JM |
529 | } |
530 | ||
531 | ||
532 | static int wpa_derive_ptk(struct wpa_sm *sm, const unsigned char *src_addr, | |
98cd3d1c | 533 | const struct wpa_eapol_key *key, struct wpa_ptk *ptk) |
6fc6879b JM |
534 | { |
535 | #ifdef CONFIG_IEEE80211R | |
56586197 | 536 | if (wpa_key_mgmt_ft(sm->key_mgmt)) |
98cd3d1c | 537 | return wpa_derive_ptk_ft(sm, src_addr, key, ptk); |
6fc6879b JM |
538 | #endif /* CONFIG_IEEE80211R */ |
539 | ||
98cd3d1c JM |
540 | return wpa_pmk_to_ptk(sm->pmk, sm->pmk_len, "Pairwise key expansion", |
541 | sm->own_addr, sm->bssid, sm->snonce, | |
542 | key->key_nonce, ptk, sm->key_mgmt, | |
543 | sm->pairwise_cipher); | |
6fc6879b JM |
544 | } |
545 | ||
546 | ||
547 | static void wpa_supplicant_process_1_of_4(struct wpa_sm *sm, | |
548 | const unsigned char *src_addr, | |
549 | const struct wpa_eapol_key *key, | |
e6270129 JM |
550 | u16 ver, const u8 *key_data, |
551 | size_t key_data_len) | |
6fc6879b JM |
552 | { |
553 | struct wpa_eapol_ie_parse ie; | |
554 | struct wpa_ptk *ptk; | |
b4a1256d | 555 | int res; |
25ef8529 JM |
556 | u8 *kde, *kde_buf = NULL; |
557 | size_t kde_len; | |
6fc6879b JM |
558 | |
559 | if (wpa_sm_get_network_ctx(sm) == NULL) { | |
f049052b BG |
560 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No SSID info " |
561 | "found (msg 1 of 4)"); | |
6fc6879b JM |
562 | return; |
563 | } | |
564 | ||
565 | wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE); | |
f049052b BG |
566 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of 4-Way " |
567 | "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver); | |
6fc6879b JM |
568 | |
569 | os_memset(&ie, 0, sizeof(ie)); | |
570 | ||
a14896e8 | 571 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { |
6fc6879b | 572 | /* RSN: msg 1/4 should contain PMKID for the selected PMK */ |
e6270129 JM |
573 | wpa_hexdump(MSG_DEBUG, "RSN: msg 1/4 key data", |
574 | key_data, key_data_len); | |
575 | if (wpa_supplicant_parse_ies(key_data, key_data_len, &ie) < 0) | |
d627a939 | 576 | goto failed; |
6fc6879b JM |
577 | if (ie.pmkid) { |
578 | wpa_hexdump(MSG_DEBUG, "RSN: PMKID from " | |
579 | "Authenticator", ie.pmkid, PMKID_LEN); | |
580 | } | |
581 | } | |
6fc6879b | 582 | |
b4a1256d JM |
583 | res = wpa_supplicant_get_pmk(sm, src_addr, ie.pmkid); |
584 | if (res == -2) { | |
f049052b BG |
585 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: Do not reply to " |
586 | "msg 1/4 - requesting full EAP authentication"); | |
b4a1256d JM |
587 | return; |
588 | } | |
589 | if (res) | |
83935317 | 590 | goto failed; |
6fc6879b JM |
591 | |
592 | if (sm->renew_snonce) { | |
3642c431 | 593 | if (random_get_bytes(sm->snonce, WPA_NONCE_LEN)) { |
0f057fb2 | 594 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
6fc6879b | 595 | "WPA: Failed to get random data for SNonce"); |
83935317 | 596 | goto failed; |
6fc6879b JM |
597 | } |
598 | sm->renew_snonce = 0; | |
599 | wpa_hexdump(MSG_DEBUG, "WPA: Renewed SNonce", | |
600 | sm->snonce, WPA_NONCE_LEN); | |
601 | } | |
602 | ||
603 | /* Calculate PTK which will be stored as a temporary PTK until it has | |
604 | * been verified when processing message 3/4. */ | |
605 | ptk = &sm->tptk; | |
b488a129 JM |
606 | if (wpa_derive_ptk(sm, src_addr, key, ptk) < 0) |
607 | goto failed; | |
3b9c5176 | 608 | if (sm->pairwise_cipher == WPA_CIPHER_TKIP) { |
d2c33b91 | 609 | u8 buf[8]; |
3b9c5176 | 610 | /* Supplicant: swap tx/rx Mic keys */ |
98cd3d1c JM |
611 | os_memcpy(buf, &ptk->tk[16], 8); |
612 | os_memcpy(&ptk->tk[16], &ptk->tk[24], 8); | |
613 | os_memcpy(&ptk->tk[24], buf, 8); | |
d2c33b91 | 614 | os_memset(buf, 0, sizeof(buf)); |
3b9c5176 | 615 | } |
6fc6879b JM |
616 | sm->tptk_set = 1; |
617 | ||
25ef8529 JM |
618 | kde = sm->assoc_wpa_ie; |
619 | kde_len = sm->assoc_wpa_ie_len; | |
620 | ||
621 | #ifdef CONFIG_P2P | |
622 | if (sm->p2p) { | |
623 | kde_buf = os_malloc(kde_len + 2 + RSN_SELECTOR_LEN + 1); | |
624 | if (kde_buf) { | |
625 | u8 *pos; | |
626 | wpa_printf(MSG_DEBUG, "P2P: Add IP Address Request KDE " | |
627 | "into EAPOL-Key 2/4"); | |
628 | os_memcpy(kde_buf, kde, kde_len); | |
629 | kde = kde_buf; | |
630 | pos = kde + kde_len; | |
631 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
632 | *pos++ = RSN_SELECTOR_LEN + 1; | |
633 | RSN_SELECTOR_PUT(pos, WFA_KEY_DATA_IP_ADDR_REQ); | |
634 | pos += RSN_SELECTOR_LEN; | |
635 | *pos++ = 0x01; | |
636 | kde_len = pos - kde; | |
637 | } | |
638 | } | |
639 | #endif /* CONFIG_P2P */ | |
640 | ||
6fc6879b | 641 | if (wpa_supplicant_send_2_of_4(sm, sm->bssid, key, ver, sm->snonce, |
c93b7e18 | 642 | kde, kde_len, ptk) < 0) |
83935317 | 643 | goto failed; |
6fc6879b | 644 | |
25ef8529 | 645 | os_free(kde_buf); |
6fc6879b | 646 | os_memcpy(sm->anonce, key->key_nonce, WPA_NONCE_LEN); |
83935317 JM |
647 | return; |
648 | ||
649 | failed: | |
25ef8529 | 650 | os_free(kde_buf); |
83935317 | 651 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); |
6fc6879b JM |
652 | } |
653 | ||
654 | ||
655 | static void wpa_sm_start_preauth(void *eloop_ctx, void *timeout_ctx) | |
656 | { | |
657 | struct wpa_sm *sm = eloop_ctx; | |
658 | rsn_preauth_candidate_process(sm); | |
659 | } | |
660 | ||
661 | ||
662 | static void wpa_supplicant_key_neg_complete(struct wpa_sm *sm, | |
663 | const u8 *addr, int secure) | |
664 | { | |
0f057fb2 JM |
665 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
666 | "WPA: Key negotiation completed with " | |
6fc6879b JM |
667 | MACSTR " [PTK=%s GTK=%s]", MAC2STR(addr), |
668 | wpa_cipher_txt(sm->pairwise_cipher), | |
669 | wpa_cipher_txt(sm->group_cipher)); | |
6fc6879b JM |
670 | wpa_sm_cancel_auth_timeout(sm); |
671 | wpa_sm_set_state(sm, WPA_COMPLETED); | |
672 | ||
673 | if (secure) { | |
674 | wpa_sm_mlme_setprotection( | |
675 | sm, addr, MLME_SETPROTECTION_PROTECT_TYPE_RX_TX, | |
676 | MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); | |
677 | eapol_sm_notify_portValid(sm->eapol, TRUE); | |
a1ea1b45 | 678 | if (wpa_key_mgmt_wpa_psk(sm->key_mgmt) || |
567da5bb | 679 | sm->key_mgmt == WPA_KEY_MGMT_DPP || |
a1ea1b45 | 680 | sm->key_mgmt == WPA_KEY_MGMT_OWE) |
6fc6879b JM |
681 | eapol_sm_notify_eap_success(sm->eapol, TRUE); |
682 | /* | |
683 | * Start preauthentication after a short wait to avoid a | |
684 | * possible race condition between the data receive and key | |
685 | * configuration after the 4-Way Handshake. This increases the | |
ffbf1eaa | 686 | * likelihood of the first preauth EAPOL-Start frame getting to |
6fc6879b JM |
687 | * the target AP. |
688 | */ | |
689 | eloop_register_timeout(1, 0, wpa_sm_start_preauth, sm, NULL); | |
690 | } | |
691 | ||
692 | if (sm->cur_pmksa && sm->cur_pmksa->opportunistic) { | |
f049052b BG |
693 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
694 | "RSN: Authenticator accepted " | |
695 | "opportunistic PMKSA entry - marking it valid"); | |
6fc6879b JM |
696 | sm->cur_pmksa->opportunistic = 0; |
697 | } | |
698 | ||
699 | #ifdef CONFIG_IEEE80211R | |
56586197 | 700 | if (wpa_key_mgmt_ft(sm->key_mgmt)) { |
6fc6879b | 701 | /* Prepare for the next transition */ |
76b7981d | 702 | wpa_ft_prepare_auth_request(sm, NULL); |
6fc6879b JM |
703 | } |
704 | #endif /* CONFIG_IEEE80211R */ | |
705 | } | |
706 | ||
707 | ||
581a8cde JM |
708 | static void wpa_sm_rekey_ptk(void *eloop_ctx, void *timeout_ctx) |
709 | { | |
710 | struct wpa_sm *sm = eloop_ctx; | |
f049052b | 711 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Request PTK rekeying"); |
581a8cde JM |
712 | wpa_sm_key_request(sm, 0, 1); |
713 | } | |
714 | ||
715 | ||
6fc6879b JM |
716 | static int wpa_supplicant_install_ptk(struct wpa_sm *sm, |
717 | const struct wpa_eapol_key *key) | |
718 | { | |
719 | int keylen, rsclen; | |
71934751 | 720 | enum wpa_alg alg; |
6fc6879b | 721 | const u8 *key_rsc; |
6fc6879b | 722 | |
53bb18cc | 723 | if (sm->ptk.installed) { |
ad00d64e JM |
724 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
725 | "WPA: Do not re-install same PTK to the driver"); | |
726 | return 0; | |
727 | } | |
728 | ||
f049052b BG |
729 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
730 | "WPA: Installing PTK to the driver"); | |
6fc6879b | 731 | |
c3550295 | 732 | if (sm->pairwise_cipher == WPA_CIPHER_NONE) { |
f049052b BG |
733 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Pairwise Cipher " |
734 | "Suite: NONE - do not use pairwise keys"); | |
6fc6879b | 735 | return 0; |
c3550295 JM |
736 | } |
737 | ||
738 | if (!wpa_cipher_valid_pairwise(sm->pairwise_cipher)) { | |
f049052b BG |
739 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
740 | "WPA: Unsupported pairwise cipher %d", | |
741 | sm->pairwise_cipher); | |
6fc6879b JM |
742 | return -1; |
743 | } | |
744 | ||
c3550295 JM |
745 | alg = wpa_cipher_to_alg(sm->pairwise_cipher); |
746 | keylen = wpa_cipher_key_len(sm->pairwise_cipher); | |
a6ea6653 JM |
747 | if (keylen <= 0 || (unsigned int) keylen != sm->ptk.tk_len) { |
748 | wpa_printf(MSG_DEBUG, "WPA: TK length mismatch: %d != %lu", | |
749 | keylen, (long unsigned int) sm->ptk.tk_len); | |
750 | return -1; | |
751 | } | |
c3550295 JM |
752 | rsclen = wpa_cipher_rsc_len(sm->pairwise_cipher); |
753 | ||
a14896e8 | 754 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { |
6fc6879b JM |
755 | key_rsc = null_rsc; |
756 | } else { | |
757 | key_rsc = key->key_rsc; | |
758 | wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, rsclen); | |
759 | } | |
760 | ||
761 | if (wpa_sm_set_key(sm, alg, sm->bssid, 0, 1, key_rsc, rsclen, | |
98cd3d1c | 762 | sm->ptk.tk, keylen) < 0) { |
f049052b BG |
763 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
764 | "WPA: Failed to set PTK to the " | |
765 | "driver (alg=%d keylen=%d bssid=" MACSTR ")", | |
766 | alg, keylen, MAC2STR(sm->bssid)); | |
6fc6879b JM |
767 | return -1; |
768 | } | |
581a8cde | 769 | |
7d711541 | 770 | /* TK is not needed anymore in supplicant */ |
98cd3d1c | 771 | os_memset(sm->ptk.tk, 0, WPA_TK_MAX_LEN); |
a6ea6653 | 772 | sm->ptk.tk_len = 0; |
53bb18cc | 773 | sm->ptk.installed = 1; |
7d711541 | 774 | |
581a8cde JM |
775 | if (sm->wpa_ptk_rekey) { |
776 | eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); | |
777 | eloop_register_timeout(sm->wpa_ptk_rekey, 0, wpa_sm_rekey_ptk, | |
778 | sm, NULL); | |
779 | } | |
780 | ||
6fc6879b JM |
781 | return 0; |
782 | } | |
783 | ||
784 | ||
f049052b BG |
785 | static int wpa_supplicant_check_group_cipher(struct wpa_sm *sm, |
786 | int group_cipher, | |
6fc6879b | 787 | int keylen, int maxkeylen, |
71934751 JM |
788 | int *key_rsc_len, |
789 | enum wpa_alg *alg) | |
6fc6879b | 790 | { |
c3550295 | 791 | int klen; |
6fc6879b | 792 | |
c3550295 JM |
793 | *alg = wpa_cipher_to_alg(group_cipher); |
794 | if (*alg == WPA_ALG_NONE) { | |
f049052b BG |
795 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
796 | "WPA: Unsupported Group Cipher %d", | |
797 | group_cipher); | |
6fc6879b JM |
798 | return -1; |
799 | } | |
c3550295 | 800 | *key_rsc_len = wpa_cipher_rsc_len(group_cipher); |
6fc6879b | 801 | |
c3550295 JM |
802 | klen = wpa_cipher_key_len(group_cipher); |
803 | if (keylen != klen || maxkeylen < klen) { | |
f049052b BG |
804 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
805 | "WPA: Unsupported %s Group Cipher key length %d (%d)", | |
806 | wpa_cipher_txt(group_cipher), keylen, maxkeylen); | |
c3550295 | 807 | return -1; |
6fc6879b | 808 | } |
c3550295 | 809 | return 0; |
6fc6879b JM |
810 | } |
811 | ||
812 | ||
813 | struct wpa_gtk_data { | |
71934751 | 814 | enum wpa_alg alg; |
6fc6879b JM |
815 | int tx, key_rsc_len, keyidx; |
816 | u8 gtk[32]; | |
817 | int gtk_len; | |
818 | }; | |
819 | ||
820 | ||
821 | static int wpa_supplicant_install_gtk(struct wpa_sm *sm, | |
822 | const struct wpa_gtk_data *gd, | |
87e2db16 | 823 | const u8 *key_rsc, int wnm_sleep) |
6fc6879b JM |
824 | { |
825 | const u8 *_gtk = gd->gtk; | |
826 | u8 gtk_buf[32]; | |
827 | ||
cb5132bb | 828 | /* Detect possible key reinstallation */ |
87e2db16 JM |
829 | if ((sm->gtk.gtk_len == (size_t) gd->gtk_len && |
830 | os_memcmp(sm->gtk.gtk, gd->gtk, sm->gtk.gtk_len) == 0) || | |
831 | (sm->gtk_wnm_sleep.gtk_len == (size_t) gd->gtk_len && | |
832 | os_memcmp(sm->gtk_wnm_sleep.gtk, gd->gtk, | |
833 | sm->gtk_wnm_sleep.gtk_len) == 0)) { | |
cb5132bb MV |
834 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
835 | "WPA: Not reinstalling already in-use GTK to the driver (keyidx=%d tx=%d len=%d)", | |
836 | gd->keyidx, gd->tx, gd->gtk_len); | |
837 | return 0; | |
838 | } | |
839 | ||
6fc6879b | 840 | wpa_hexdump_key(MSG_DEBUG, "WPA: Group Key", gd->gtk, gd->gtk_len); |
f049052b BG |
841 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
842 | "WPA: Installing GTK to the driver (keyidx=%d tx=%d len=%d)", | |
843 | gd->keyidx, gd->tx, gd->gtk_len); | |
6fc6879b JM |
844 | wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, gd->key_rsc_len); |
845 | if (sm->group_cipher == WPA_CIPHER_TKIP) { | |
846 | /* Swap Tx/Rx keys for Michael MIC */ | |
847 | os_memcpy(gtk_buf, gd->gtk, 16); | |
848 | os_memcpy(gtk_buf + 16, gd->gtk + 24, 8); | |
849 | os_memcpy(gtk_buf + 24, gd->gtk + 16, 8); | |
850 | _gtk = gtk_buf; | |
851 | } | |
852 | if (sm->pairwise_cipher == WPA_CIPHER_NONE) { | |
0382097e | 853 | if (wpa_sm_set_key(sm, gd->alg, NULL, |
6fc6879b JM |
854 | gd->keyidx, 1, key_rsc, gd->key_rsc_len, |
855 | _gtk, gd->gtk_len) < 0) { | |
f049052b BG |
856 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
857 | "WPA: Failed to set GTK to the driver " | |
858 | "(Group only)"); | |
d2c33b91 | 859 | os_memset(gtk_buf, 0, sizeof(gtk_buf)); |
6fc6879b JM |
860 | return -1; |
861 | } | |
0382097e | 862 | } else if (wpa_sm_set_key(sm, gd->alg, broadcast_ether_addr, |
6fc6879b JM |
863 | gd->keyidx, gd->tx, key_rsc, gd->key_rsc_len, |
864 | _gtk, gd->gtk_len) < 0) { | |
f049052b BG |
865 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
866 | "WPA: Failed to set GTK to " | |
867 | "the driver (alg=%d keylen=%d keyidx=%d)", | |
868 | gd->alg, gd->gtk_len, gd->keyidx); | |
d2c33b91 | 869 | os_memset(gtk_buf, 0, sizeof(gtk_buf)); |
6fc6879b JM |
870 | return -1; |
871 | } | |
d2c33b91 | 872 | os_memset(gtk_buf, 0, sizeof(gtk_buf)); |
6fc6879b | 873 | |
87e2db16 JM |
874 | if (wnm_sleep) { |
875 | sm->gtk_wnm_sleep.gtk_len = gd->gtk_len; | |
876 | os_memcpy(sm->gtk_wnm_sleep.gtk, gd->gtk, | |
877 | sm->gtk_wnm_sleep.gtk_len); | |
878 | } else { | |
879 | sm->gtk.gtk_len = gd->gtk_len; | |
880 | os_memcpy(sm->gtk.gtk, gd->gtk, sm->gtk.gtk_len); | |
881 | } | |
cb5132bb | 882 | |
6fc6879b JM |
883 | return 0; |
884 | } | |
885 | ||
886 | ||
887 | static int wpa_supplicant_gtk_tx_bit_workaround(const struct wpa_sm *sm, | |
888 | int tx) | |
889 | { | |
890 | if (tx && sm->pairwise_cipher != WPA_CIPHER_NONE) { | |
891 | /* Ignore Tx bit for GTK if a pairwise key is used. One AP | |
892 | * seemed to set this bit (incorrectly, since Tx is only when | |
893 | * doing Group Key only APs) and without this workaround, the | |
894 | * data connection does not work because wpa_supplicant | |
895 | * configured non-zero keyidx to be used for unicast. */ | |
f049052b BG |
896 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
897 | "WPA: Tx bit set for GTK, but pairwise " | |
898 | "keys are used - ignore Tx bit"); | |
6fc6879b JM |
899 | return 0; |
900 | } | |
901 | return tx; | |
902 | } | |
903 | ||
904 | ||
73ed03f3 MS |
905 | static int wpa_supplicant_rsc_relaxation(const struct wpa_sm *sm, |
906 | const u8 *rsc) | |
907 | { | |
908 | int rsclen; | |
909 | ||
910 | if (!sm->wpa_rsc_relaxation) | |
911 | return 0; | |
912 | ||
913 | rsclen = wpa_cipher_rsc_len(sm->group_cipher); | |
914 | ||
915 | /* | |
916 | * Try to detect RSC (endian) corruption issue where the AP sends | |
917 | * the RSC bytes in EAPOL-Key message in the wrong order, both if | |
918 | * it's actually a 6-byte field (as it should be) and if it treats | |
919 | * it as an 8-byte field. | |
920 | * An AP model known to have this bug is the Sapido RB-1632. | |
921 | */ | |
922 | if (rsclen == 6 && ((rsc[5] && !rsc[0]) || rsc[6] || rsc[7])) { | |
923 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, | |
924 | "RSC %02x%02x%02x%02x%02x%02x%02x%02x is likely bogus, using 0", | |
925 | rsc[0], rsc[1], rsc[2], rsc[3], | |
926 | rsc[4], rsc[5], rsc[6], rsc[7]); | |
927 | ||
928 | return 1; | |
929 | } | |
930 | ||
931 | return 0; | |
932 | } | |
933 | ||
934 | ||
6fc6879b JM |
935 | static int wpa_supplicant_pairwise_gtk(struct wpa_sm *sm, |
936 | const struct wpa_eapol_key *key, | |
937 | const u8 *gtk, size_t gtk_len, | |
938 | int key_info) | |
939 | { | |
6fc6879b | 940 | struct wpa_gtk_data gd; |
73ed03f3 | 941 | const u8 *key_rsc; |
6fc6879b JM |
942 | |
943 | /* | |
944 | * IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames - Figure 43x | |
945 | * GTK KDE format: | |
946 | * KeyID[bits 0-1], Tx [bit 2], Reserved [bits 3-7] | |
947 | * Reserved [bits 0-7] | |
948 | * GTK | |
949 | */ | |
950 | ||
951 | os_memset(&gd, 0, sizeof(gd)); | |
952 | wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in pairwise handshake", | |
953 | gtk, gtk_len); | |
954 | ||
955 | if (gtk_len < 2 || gtk_len - 2 > sizeof(gd.gtk)) | |
956 | return -1; | |
957 | ||
958 | gd.keyidx = gtk[0] & 0x3; | |
959 | gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm, | |
960 | !!(gtk[0] & BIT(2))); | |
961 | gtk += 2; | |
962 | gtk_len -= 2; | |
963 | ||
964 | os_memcpy(gd.gtk, gtk, gtk_len); | |
965 | gd.gtk_len = gtk_len; | |
966 | ||
73ed03f3 MS |
967 | key_rsc = key->key_rsc; |
968 | if (wpa_supplicant_rsc_relaxation(sm, key->key_rsc)) | |
969 | key_rsc = null_rsc; | |
970 | ||
dff1e285 JM |
971 | if (sm->group_cipher != WPA_CIPHER_GTK_NOT_USED && |
972 | (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, | |
973 | gtk_len, gtk_len, | |
974 | &gd.key_rsc_len, &gd.alg) || | |
87e2db16 | 975 | wpa_supplicant_install_gtk(sm, &gd, key_rsc, 0))) { |
f049052b BG |
976 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
977 | "RSN: Failed to install GTK"); | |
d2c33b91 | 978 | os_memset(&gd, 0, sizeof(gd)); |
6fc6879b JM |
979 | return -1; |
980 | } | |
d2c33b91 | 981 | os_memset(&gd, 0, sizeof(gd)); |
6fc6879b JM |
982 | |
983 | wpa_supplicant_key_neg_complete(sm, sm->bssid, | |
984 | key_info & WPA_KEY_INFO_SECURE); | |
985 | return 0; | |
6fc6879b JM |
986 | } |
987 | ||
988 | ||
cb5132bb MV |
989 | #ifdef CONFIG_IEEE80211W |
990 | static int wpa_supplicant_install_igtk(struct wpa_sm *sm, | |
87e2db16 JM |
991 | const struct wpa_igtk_kde *igtk, |
992 | int wnm_sleep) | |
cb5132bb MV |
993 | { |
994 | size_t len = wpa_cipher_key_len(sm->mgmt_group_cipher); | |
995 | u16 keyidx = WPA_GET_LE16(igtk->keyid); | |
996 | ||
997 | /* Detect possible key reinstallation */ | |
87e2db16 JM |
998 | if ((sm->igtk.igtk_len == len && |
999 | os_memcmp(sm->igtk.igtk, igtk->igtk, sm->igtk.igtk_len) == 0) || | |
1000 | (sm->igtk_wnm_sleep.igtk_len == len && | |
1001 | os_memcmp(sm->igtk_wnm_sleep.igtk, igtk->igtk, | |
1002 | sm->igtk_wnm_sleep.igtk_len) == 0)) { | |
cb5132bb MV |
1003 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1004 | "WPA: Not reinstalling already in-use IGTK to the driver (keyidx=%d)", | |
1005 | keyidx); | |
1006 | return 0; | |
1007 | } | |
1008 | ||
1009 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
1010 | "WPA: IGTK keyid %d pn %02x%02x%02x%02x%02x%02x", | |
1011 | keyidx, MAC2STR(igtk->pn)); | |
1012 | wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK", igtk->igtk, len); | |
1013 | if (keyidx > 4095) { | |
1014 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, | |
1015 | "WPA: Invalid IGTK KeyID %d", keyidx); | |
1016 | return -1; | |
1017 | } | |
1018 | if (wpa_sm_set_key(sm, wpa_cipher_to_alg(sm->mgmt_group_cipher), | |
1019 | broadcast_ether_addr, | |
1020 | keyidx, 0, igtk->pn, sizeof(igtk->pn), | |
1021 | igtk->igtk, len) < 0) { | |
1022 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, | |
1023 | "WPA: Failed to configure IGTK to the driver"); | |
1024 | return -1; | |
1025 | } | |
1026 | ||
87e2db16 JM |
1027 | if (wnm_sleep) { |
1028 | sm->igtk_wnm_sleep.igtk_len = len; | |
1029 | os_memcpy(sm->igtk_wnm_sleep.igtk, igtk->igtk, | |
1030 | sm->igtk_wnm_sleep.igtk_len); | |
1031 | } else { | |
1032 | sm->igtk.igtk_len = len; | |
1033 | os_memcpy(sm->igtk.igtk, igtk->igtk, sm->igtk.igtk_len); | |
1034 | } | |
cb5132bb MV |
1035 | |
1036 | return 0; | |
1037 | } | |
1038 | #endif /* CONFIG_IEEE80211W */ | |
1039 | ||
1040 | ||
6fc6879b JM |
1041 | static int ieee80211w_set_keys(struct wpa_sm *sm, |
1042 | struct wpa_eapol_ie_parse *ie) | |
1043 | { | |
1044 | #ifdef CONFIG_IEEE80211W | |
8dd9f9cd | 1045 | if (!wpa_cipher_valid_mgmt_group(sm->mgmt_group_cipher)) |
6fc6879b JM |
1046 | return 0; |
1047 | ||
1048 | if (ie->igtk) { | |
8dd9f9cd | 1049 | size_t len; |
6fc6879b | 1050 | const struct wpa_igtk_kde *igtk; |
cb5132bb | 1051 | |
8dd9f9cd JM |
1052 | len = wpa_cipher_key_len(sm->mgmt_group_cipher); |
1053 | if (ie->igtk_len != WPA_IGTK_KDE_PREFIX_LEN + len) | |
6fc6879b | 1054 | return -1; |
cb5132bb | 1055 | |
6fc6879b | 1056 | igtk = (const struct wpa_igtk_kde *) ie->igtk; |
87e2db16 | 1057 | if (wpa_supplicant_install_igtk(sm, igtk, 0) < 0) |
6fc6879b | 1058 | return -1; |
6fc6879b JM |
1059 | } |
1060 | ||
1061 | return 0; | |
1062 | #else /* CONFIG_IEEE80211W */ | |
1063 | return 0; | |
1064 | #endif /* CONFIG_IEEE80211W */ | |
1065 | } | |
1066 | ||
1067 | ||
1068 | static void wpa_report_ie_mismatch(struct wpa_sm *sm, | |
1069 | const char *reason, const u8 *src_addr, | |
1070 | const u8 *wpa_ie, size_t wpa_ie_len, | |
1071 | const u8 *rsn_ie, size_t rsn_ie_len) | |
1072 | { | |
0f057fb2 | 1073 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: %s (src=" MACSTR ")", |
6fc6879b JM |
1074 | reason, MAC2STR(src_addr)); |
1075 | ||
1076 | if (sm->ap_wpa_ie) { | |
1077 | wpa_hexdump(MSG_INFO, "WPA: WPA IE in Beacon/ProbeResp", | |
1078 | sm->ap_wpa_ie, sm->ap_wpa_ie_len); | |
1079 | } | |
1080 | if (wpa_ie) { | |
1081 | if (!sm->ap_wpa_ie) { | |
f049052b BG |
1082 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1083 | "WPA: No WPA IE in Beacon/ProbeResp"); | |
6fc6879b JM |
1084 | } |
1085 | wpa_hexdump(MSG_INFO, "WPA: WPA IE in 3/4 msg", | |
1086 | wpa_ie, wpa_ie_len); | |
1087 | } | |
1088 | ||
1089 | if (sm->ap_rsn_ie) { | |
1090 | wpa_hexdump(MSG_INFO, "WPA: RSN IE in Beacon/ProbeResp", | |
1091 | sm->ap_rsn_ie, sm->ap_rsn_ie_len); | |
1092 | } | |
1093 | if (rsn_ie) { | |
1094 | if (!sm->ap_rsn_ie) { | |
f049052b BG |
1095 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1096 | "WPA: No RSN IE in Beacon/ProbeResp"); | |
6fc6879b JM |
1097 | } |
1098 | wpa_hexdump(MSG_INFO, "WPA: RSN IE in 3/4 msg", | |
1099 | rsn_ie, rsn_ie_len); | |
1100 | } | |
1101 | ||
3da372fa | 1102 | wpa_sm_deauthenticate(sm, WLAN_REASON_IE_IN_4WAY_DIFFERS); |
6fc6879b JM |
1103 | } |
1104 | ||
1105 | ||
5af8187e JM |
1106 | #ifdef CONFIG_IEEE80211R |
1107 | ||
1108 | static int ft_validate_mdie(struct wpa_sm *sm, | |
1109 | const unsigned char *src_addr, | |
3b4f6dac JM |
1110 | struct wpa_eapol_ie_parse *ie, |
1111 | const u8 *assoc_resp_mdie) | |
5af8187e JM |
1112 | { |
1113 | struct rsn_mdie *mdie; | |
1114 | ||
5af8187e JM |
1115 | mdie = (struct rsn_mdie *) (ie->mdie + 2); |
1116 | if (ie->mdie == NULL || ie->mdie_len < 2 + sizeof(*mdie) || | |
1117 | os_memcmp(mdie->mobility_domain, sm->mobility_domain, | |
1118 | MOBILITY_DOMAIN_ID_LEN) != 0) { | |
f049052b BG |
1119 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE in msg 3/4 did " |
1120 | "not match with the current mobility domain"); | |
5af8187e JM |
1121 | return -1; |
1122 | } | |
1123 | ||
3b4f6dac JM |
1124 | if (assoc_resp_mdie && |
1125 | (assoc_resp_mdie[1] != ie->mdie[1] || | |
1126 | os_memcmp(assoc_resp_mdie, ie->mdie, 2 + ie->mdie[1]) != 0)) { | |
f049052b | 1127 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE mismatch"); |
3b4f6dac JM |
1128 | wpa_hexdump(MSG_DEBUG, "FT: MDIE in EAPOL-Key msg 3/4", |
1129 | ie->mdie, 2 + ie->mdie[1]); | |
1130 | wpa_hexdump(MSG_DEBUG, "FT: MDIE in (Re)Association Response", | |
1131 | assoc_resp_mdie, 2 + assoc_resp_mdie[1]); | |
1132 | return -1; | |
1133 | } | |
1134 | ||
1135 | return 0; | |
1136 | } | |
1137 | ||
1138 | ||
1139 | static int ft_validate_ftie(struct wpa_sm *sm, | |
1140 | const unsigned char *src_addr, | |
1141 | struct wpa_eapol_ie_parse *ie, | |
1142 | const u8 *assoc_resp_ftie) | |
1143 | { | |
1144 | if (ie->ftie == NULL) { | |
f049052b BG |
1145 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1146 | "FT: No FTIE in EAPOL-Key msg 3/4"); | |
3b4f6dac JM |
1147 | return -1; |
1148 | } | |
1149 | ||
1150 | if (assoc_resp_ftie == NULL) | |
1151 | return 0; | |
1152 | ||
1153 | if (assoc_resp_ftie[1] != ie->ftie[1] || | |
1154 | os_memcmp(assoc_resp_ftie, ie->ftie, 2 + ie->ftie[1]) != 0) { | |
f049052b | 1155 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: FTIE mismatch"); |
3b4f6dac JM |
1156 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 3/4", |
1157 | ie->ftie, 2 + ie->ftie[1]); | |
1158 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)Association Response", | |
1159 | assoc_resp_ftie, 2 + assoc_resp_ftie[1]); | |
1160 | return -1; | |
1161 | } | |
1162 | ||
5af8187e JM |
1163 | return 0; |
1164 | } | |
1165 | ||
1166 | ||
1167 | static int ft_validate_rsnie(struct wpa_sm *sm, | |
1168 | const unsigned char *src_addr, | |
1169 | struct wpa_eapol_ie_parse *ie) | |
1170 | { | |
1171 | struct wpa_ie_data rsn; | |
1172 | ||
1173 | if (!ie->rsn_ie) | |
1174 | return 0; | |
1175 | ||
1176 | /* | |
1177 | * Verify that PMKR1Name from EAPOL-Key message 3/4 | |
1178 | * matches with the value we derived. | |
1179 | */ | |
1180 | if (wpa_parse_wpa_ie_rsn(ie->rsn_ie, ie->rsn_ie_len, &rsn) < 0 || | |
1181 | rsn.num_pmkid != 1 || rsn.pmkid == NULL) { | |
f049052b BG |
1182 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: No PMKR1Name in " |
1183 | "FT 4-way handshake message 3/4"); | |
5af8187e JM |
1184 | return -1; |
1185 | } | |
1186 | ||
0d15b69f JM |
1187 | if (os_memcmp_const(rsn.pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0) |
1188 | { | |
f049052b BG |
1189 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1190 | "FT: PMKR1Name mismatch in " | |
1191 | "FT 4-way handshake message 3/4"); | |
5af8187e JM |
1192 | wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Authenticator", |
1193 | rsn.pmkid, WPA_PMK_NAME_LEN); | |
1194 | wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name", | |
1195 | sm->pmk_r1_name, WPA_PMK_NAME_LEN); | |
1196 | return -1; | |
1197 | } | |
1198 | ||
1199 | return 0; | |
1200 | } | |
1201 | ||
1202 | ||
1203 | static int wpa_supplicant_validate_ie_ft(struct wpa_sm *sm, | |
1204 | const unsigned char *src_addr, | |
1205 | struct wpa_eapol_ie_parse *ie) | |
1206 | { | |
3b4f6dac JM |
1207 | const u8 *pos, *end, *mdie = NULL, *ftie = NULL; |
1208 | ||
1209 | if (sm->assoc_resp_ies) { | |
1210 | pos = sm->assoc_resp_ies; | |
1211 | end = pos + sm->assoc_resp_ies_len; | |
2461724c JM |
1212 | while (end - pos > 2) { |
1213 | if (2 + pos[1] > end - pos) | |
3b4f6dac JM |
1214 | break; |
1215 | switch (*pos) { | |
1216 | case WLAN_EID_MOBILITY_DOMAIN: | |
1217 | mdie = pos; | |
1218 | break; | |
1219 | case WLAN_EID_FAST_BSS_TRANSITION: | |
1220 | ftie = pos; | |
1221 | break; | |
1222 | } | |
1223 | pos += 2 + pos[1]; | |
1224 | } | |
1225 | } | |
1226 | ||
1227 | if (ft_validate_mdie(sm, src_addr, ie, mdie) < 0 || | |
1228 | ft_validate_ftie(sm, src_addr, ie, ftie) < 0 || | |
5af8187e JM |
1229 | ft_validate_rsnie(sm, src_addr, ie) < 0) |
1230 | return -1; | |
1231 | ||
1232 | return 0; | |
1233 | } | |
1234 | ||
1235 | #endif /* CONFIG_IEEE80211R */ | |
1236 | ||
1237 | ||
6fc6879b JM |
1238 | static int wpa_supplicant_validate_ie(struct wpa_sm *sm, |
1239 | const unsigned char *src_addr, | |
1240 | struct wpa_eapol_ie_parse *ie) | |
1241 | { | |
1242 | if (sm->ap_wpa_ie == NULL && sm->ap_rsn_ie == NULL) { | |
f049052b BG |
1243 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1244 | "WPA: No WPA/RSN IE for this AP known. " | |
1245 | "Trying to get from scan results"); | |
6fc6879b | 1246 | if (wpa_sm_get_beacon_ie(sm) < 0) { |
f049052b BG |
1247 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1248 | "WPA: Could not find AP from " | |
1249 | "the scan results"); | |
6fc6879b | 1250 | } else { |
f049052b BG |
1251 | wpa_msg(sm->ctx->msg_ctx, MSG_DEBUG, |
1252 | "WPA: Found the current AP from " | |
1253 | "updated scan results"); | |
6fc6879b JM |
1254 | } |
1255 | } | |
1256 | ||
1257 | if (ie->wpa_ie == NULL && ie->rsn_ie == NULL && | |
1258 | (sm->ap_wpa_ie || sm->ap_rsn_ie)) { | |
1259 | wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " | |
1260 | "with IE in Beacon/ProbeResp (no IE?)", | |
1261 | src_addr, ie->wpa_ie, ie->wpa_ie_len, | |
1262 | ie->rsn_ie, ie->rsn_ie_len); | |
1263 | return -1; | |
1264 | } | |
1265 | ||
1266 | if ((ie->wpa_ie && sm->ap_wpa_ie && | |
1267 | (ie->wpa_ie_len != sm->ap_wpa_ie_len || | |
1268 | os_memcmp(ie->wpa_ie, sm->ap_wpa_ie, ie->wpa_ie_len) != 0)) || | |
1269 | (ie->rsn_ie && sm->ap_rsn_ie && | |
26e23750 JM |
1270 | wpa_compare_rsn_ie(wpa_key_mgmt_ft(sm->key_mgmt), |
1271 | sm->ap_rsn_ie, sm->ap_rsn_ie_len, | |
1272 | ie->rsn_ie, ie->rsn_ie_len))) { | |
6fc6879b JM |
1273 | wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " |
1274 | "with IE in Beacon/ProbeResp", | |
1275 | src_addr, ie->wpa_ie, ie->wpa_ie_len, | |
1276 | ie->rsn_ie, ie->rsn_ie_len); | |
1277 | return -1; | |
1278 | } | |
1279 | ||
1280 | if (sm->proto == WPA_PROTO_WPA && | |
1281 | ie->rsn_ie && sm->ap_rsn_ie == NULL && sm->rsn_enabled) { | |
1282 | wpa_report_ie_mismatch(sm, "Possible downgrade attack " | |
1283 | "detected - RSN was enabled and RSN IE " | |
1284 | "was in msg 3/4, but not in " | |
1285 | "Beacon/ProbeResp", | |
1286 | src_addr, ie->wpa_ie, ie->wpa_ie_len, | |
1287 | ie->rsn_ie, ie->rsn_ie_len); | |
1288 | return -1; | |
1289 | } | |
1290 | ||
1291 | #ifdef CONFIG_IEEE80211R | |
5af8187e JM |
1292 | if (wpa_key_mgmt_ft(sm->key_mgmt) && |
1293 | wpa_supplicant_validate_ie_ft(sm, src_addr, ie) < 0) | |
1294 | return -1; | |
6fc6879b JM |
1295 | #endif /* CONFIG_IEEE80211R */ |
1296 | ||
1297 | return 0; | |
1298 | } | |
1299 | ||
1300 | ||
1301 | /** | |
1302 | * wpa_supplicant_send_4_of_4 - Send message 4 of WPA/RSN 4-Way Handshake | |
1303 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
1304 | * @dst: Destination address for the frame | |
1305 | * @key: Pointer to the EAPOL-Key frame header | |
1306 | * @ver: Version bits from EAPOL-Key Key Info | |
1307 | * @key_info: Key Info | |
6fc6879b | 1308 | * @ptk: PTK to use for keyed hash and encryption |
c93b7e18 | 1309 | * Returns: >= 0 on success, < 0 on failure |
6fc6879b JM |
1310 | */ |
1311 | int wpa_supplicant_send_4_of_4(struct wpa_sm *sm, const unsigned char *dst, | |
1312 | const struct wpa_eapol_key *key, | |
1313 | u16 ver, u16 key_info, | |
6fc6879b JM |
1314 | struct wpa_ptk *ptk) |
1315 | { | |
5e3b5197 | 1316 | size_t mic_len, hdrlen, rlen; |
6fc6879b | 1317 | struct wpa_eapol_key *reply; |
5e3b5197 | 1318 | u8 *rbuf, *key_mic; |
6fc6879b | 1319 | |
567da5bb | 1320 | mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len); |
6d014ffc | 1321 | hdrlen = sizeof(*reply) + mic_len + 2; |
6fc6879b | 1322 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, |
5e3b5197 | 1323 | hdrlen, &rlen, (void *) &reply); |
6fc6879b JM |
1324 | if (rbuf == NULL) |
1325 | return -1; | |
1326 | ||
a14896e8 JM |
1327 | reply->type = (sm->proto == WPA_PROTO_RSN || |
1328 | sm->proto == WPA_PROTO_OSEN) ? | |
6fc6879b JM |
1329 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; |
1330 | key_info &= WPA_KEY_INFO_SECURE; | |
4a26ccda JM |
1331 | key_info |= ver | WPA_KEY_INFO_KEY_TYPE; |
1332 | if (mic_len) | |
1333 | key_info |= WPA_KEY_INFO_MIC; | |
2022f1d0 JM |
1334 | else |
1335 | key_info |= WPA_KEY_INFO_ENCR_KEY_DATA; | |
6fc6879b | 1336 | WPA_PUT_BE16(reply->key_info, key_info); |
a14896e8 | 1337 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) |
6fc6879b JM |
1338 | WPA_PUT_BE16(reply->key_length, 0); |
1339 | else | |
1340 | os_memcpy(reply->key_length, key->key_length, 2); | |
1341 | os_memcpy(reply->replay_counter, key->replay_counter, | |
1342 | WPA_REPLAY_COUNTER_LEN); | |
1343 | ||
6d014ffc JM |
1344 | key_mic = (u8 *) (reply + 1); |
1345 | WPA_PUT_BE16(key_mic + mic_len, 0); | |
6fc6879b | 1346 | |
f049052b | 1347 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 4/4"); |
1049af7e JM |
1348 | return wpa_eapol_key_send(sm, ptk, ver, dst, ETH_P_EAPOL, rbuf, rlen, |
1349 | key_mic); | |
6fc6879b JM |
1350 | } |
1351 | ||
1352 | ||
1353 | static void wpa_supplicant_process_3_of_4(struct wpa_sm *sm, | |
1354 | const struct wpa_eapol_key *key, | |
e6270129 JM |
1355 | u16 ver, const u8 *key_data, |
1356 | size_t key_data_len) | |
6fc6879b | 1357 | { |
e6270129 | 1358 | u16 key_info, keylen; |
6fc6879b JM |
1359 | struct wpa_eapol_ie_parse ie; |
1360 | ||
1361 | wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE); | |
f049052b BG |
1362 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 3 of 4-Way " |
1363 | "Handshake from " MACSTR " (ver=%d)", MAC2STR(sm->bssid), ver); | |
6fc6879b JM |
1364 | |
1365 | key_info = WPA_GET_BE16(key->key_info); | |
1366 | ||
e6270129 JM |
1367 | wpa_hexdump(MSG_DEBUG, "WPA: IE KeyData", key_data, key_data_len); |
1368 | if (wpa_supplicant_parse_ies(key_data, key_data_len, &ie) < 0) | |
d627a939 | 1369 | goto failed; |
6fc6879b | 1370 | if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { |
f049052b BG |
1371 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1372 | "WPA: GTK IE in unencrypted key data"); | |
83935317 | 1373 | goto failed; |
6fc6879b JM |
1374 | } |
1375 | #ifdef CONFIG_IEEE80211W | |
1376 | if (ie.igtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { | |
f049052b BG |
1377 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1378 | "WPA: IGTK KDE in unencrypted key data"); | |
83935317 | 1379 | goto failed; |
6fc6879b JM |
1380 | } |
1381 | ||
8dd9f9cd JM |
1382 | if (ie.igtk && |
1383 | wpa_cipher_valid_mgmt_group(sm->mgmt_group_cipher) && | |
1384 | ie.igtk_len != WPA_IGTK_KDE_PREFIX_LEN + | |
1385 | (unsigned int) wpa_cipher_key_len(sm->mgmt_group_cipher)) { | |
f049052b BG |
1386 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1387 | "WPA: Invalid IGTK KDE length %lu", | |
1388 | (unsigned long) ie.igtk_len); | |
83935317 | 1389 | goto failed; |
6fc6879b JM |
1390 | } |
1391 | #endif /* CONFIG_IEEE80211W */ | |
1392 | ||
1393 | if (wpa_supplicant_validate_ie(sm, sm->bssid, &ie) < 0) | |
83935317 | 1394 | goto failed; |
6fc6879b JM |
1395 | |
1396 | if (os_memcmp(sm->anonce, key->key_nonce, WPA_NONCE_LEN) != 0) { | |
f049052b BG |
1397 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1398 | "WPA: ANonce from message 1 of 4-Way Handshake " | |
1399 | "differs from 3 of 4-Way Handshake - drop packet (src=" | |
1400 | MACSTR ")", MAC2STR(sm->bssid)); | |
83935317 | 1401 | goto failed; |
6fc6879b JM |
1402 | } |
1403 | ||
1404 | keylen = WPA_GET_BE16(key->key_length); | |
c3550295 JM |
1405 | if (keylen != wpa_cipher_key_len(sm->pairwise_cipher)) { |
1406 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, | |
1407 | "WPA: Invalid %s key length %d (src=" MACSTR | |
1408 | ")", wpa_cipher_txt(sm->pairwise_cipher), keylen, | |
1409 | MAC2STR(sm->bssid)); | |
1410 | goto failed; | |
6fc6879b JM |
1411 | } |
1412 | ||
25ef8529 JM |
1413 | #ifdef CONFIG_P2P |
1414 | if (ie.ip_addr_alloc) { | |
1415 | os_memcpy(sm->p2p_ip_addr, ie.ip_addr_alloc, 3 * 4); | |
1416 | wpa_hexdump(MSG_DEBUG, "P2P: IP address info", | |
1417 | sm->p2p_ip_addr, sizeof(sm->p2p_ip_addr)); | |
1418 | } | |
1419 | #endif /* CONFIG_P2P */ | |
1420 | ||
6fc6879b | 1421 | if (wpa_supplicant_send_4_of_4(sm, sm->bssid, key, ver, key_info, |
c93b7e18 | 1422 | &sm->ptk) < 0) { |
83935317 JM |
1423 | goto failed; |
1424 | } | |
6fc6879b JM |
1425 | |
1426 | /* SNonce was successfully used in msg 3/4, so mark it to be renewed | |
1427 | * for the next 4-Way Handshake. If msg 3 is received again, the old | |
1428 | * SNonce will still be used to avoid changing PTK. */ | |
1429 | sm->renew_snonce = 1; | |
1430 | ||
1431 | if (key_info & WPA_KEY_INFO_INSTALL) { | |
83935317 JM |
1432 | if (wpa_supplicant_install_ptk(sm, key)) |
1433 | goto failed; | |
6fc6879b JM |
1434 | } |
1435 | ||
1436 | if (key_info & WPA_KEY_INFO_SECURE) { | |
1437 | wpa_sm_mlme_setprotection( | |
1438 | sm, sm->bssid, MLME_SETPROTECTION_PROTECT_TYPE_RX, | |
1439 | MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); | |
1440 | eapol_sm_notify_portValid(sm->eapol, TRUE); | |
1441 | } | |
1442 | wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); | |
1443 | ||
dff1e285 JM |
1444 | if (sm->group_cipher == WPA_CIPHER_GTK_NOT_USED) { |
1445 | wpa_supplicant_key_neg_complete(sm, sm->bssid, | |
1446 | key_info & WPA_KEY_INFO_SECURE); | |
1447 | } else if (ie.gtk && | |
6fc6879b JM |
1448 | wpa_supplicant_pairwise_gtk(sm, key, |
1449 | ie.gtk, ie.gtk_len, key_info) < 0) { | |
f049052b BG |
1450 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1451 | "RSN: Failed to configure GTK"); | |
83935317 | 1452 | goto failed; |
6fc6879b JM |
1453 | } |
1454 | ||
83935317 | 1455 | if (ieee80211w_set_keys(sm, &ie) < 0) { |
f049052b BG |
1456 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1457 | "RSN: Failed to configure IGTK"); | |
83935317 JM |
1458 | goto failed; |
1459 | } | |
1460 | ||
392e68e8 SD |
1461 | if (ie.gtk) |
1462 | wpa_sm_set_rekey_offload(sm); | |
b14a210c | 1463 | |
087a1f4e JM |
1464 | if (sm->proto == WPA_PROTO_RSN && wpa_key_mgmt_suite_b(sm->key_mgmt)) { |
1465 | struct rsn_pmksa_cache_entry *sa; | |
1466 | ||
70c93963 | 1467 | sa = pmksa_cache_add(sm->pmksa, sm->pmk, sm->pmk_len, NULL, |
98cd3d1c | 1468 | sm->ptk.kck, sm->ptk.kck_len, |
087a1f4e | 1469 | sm->bssid, sm->own_addr, |
869af307 | 1470 | sm->network_ctx, sm->key_mgmt, NULL); |
087a1f4e JM |
1471 | if (!sm->cur_pmksa) |
1472 | sm->cur_pmksa = sa; | |
1473 | } | |
1474 | ||
761396e4 | 1475 | sm->msg_3_of_4_ok = 1; |
83935317 JM |
1476 | return; |
1477 | ||
1478 | failed: | |
1479 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); | |
6fc6879b JM |
1480 | } |
1481 | ||
1482 | ||
1483 | static int wpa_supplicant_process_1_of_2_rsn(struct wpa_sm *sm, | |
1484 | const u8 *keydata, | |
1485 | size_t keydatalen, | |
1486 | u16 key_info, | |
1487 | struct wpa_gtk_data *gd) | |
1488 | { | |
1489 | int maxkeylen; | |
1490 | struct wpa_eapol_ie_parse ie; | |
1491 | ||
ecbdc1a1 JM |
1492 | wpa_hexdump_key(MSG_DEBUG, "RSN: msg 1/2 key data", |
1493 | keydata, keydatalen); | |
d627a939 JM |
1494 | if (wpa_supplicant_parse_ies(keydata, keydatalen, &ie) < 0) |
1495 | return -1; | |
6fc6879b | 1496 | if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { |
f049052b BG |
1497 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1498 | "WPA: GTK IE in unencrypted key data"); | |
6fc6879b JM |
1499 | return -1; |
1500 | } | |
1501 | if (ie.gtk == NULL) { | |
f049052b BG |
1502 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1503 | "WPA: No GTK IE in Group Key msg 1/2"); | |
6fc6879b JM |
1504 | return -1; |
1505 | } | |
1506 | maxkeylen = gd->gtk_len = ie.gtk_len - 2; | |
1507 | ||
f049052b | 1508 | if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, |
6fc6879b JM |
1509 | gd->gtk_len, maxkeylen, |
1510 | &gd->key_rsc_len, &gd->alg)) | |
1511 | return -1; | |
1512 | ||
7cb9bb4d JM |
1513 | wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in group key handshake", |
1514 | ie.gtk, ie.gtk_len); | |
6fc6879b JM |
1515 | gd->keyidx = ie.gtk[0] & 0x3; |
1516 | gd->tx = wpa_supplicant_gtk_tx_bit_workaround(sm, | |
1517 | !!(ie.gtk[0] & BIT(2))); | |
1518 | if (ie.gtk_len - 2 > sizeof(gd->gtk)) { | |
f049052b BG |
1519 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1520 | "RSN: Too long GTK in GTK IE (len=%lu)", | |
1521 | (unsigned long) ie.gtk_len - 2); | |
6fc6879b JM |
1522 | return -1; |
1523 | } | |
1524 | os_memcpy(gd->gtk, ie.gtk + 2, ie.gtk_len - 2); | |
1525 | ||
1526 | if (ieee80211w_set_keys(sm, &ie) < 0) | |
f049052b BG |
1527 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1528 | "RSN: Failed to configure IGTK"); | |
6fc6879b JM |
1529 | |
1530 | return 0; | |
1531 | } | |
1532 | ||
1533 | ||
1534 | static int wpa_supplicant_process_1_of_2_wpa(struct wpa_sm *sm, | |
1535 | const struct wpa_eapol_key *key, | |
e6270129 JM |
1536 | const u8 *key_data, |
1537 | size_t key_data_len, u16 key_info, | |
1538 | u16 ver, struct wpa_gtk_data *gd) | |
6fc6879b JM |
1539 | { |
1540 | size_t maxkeylen; | |
c397eff8 | 1541 | u16 gtk_len; |
6fc6879b | 1542 | |
c397eff8 | 1543 | gtk_len = WPA_GET_BE16(key->key_length); |
e6270129 | 1544 | maxkeylen = key_data_len; |
6fc6879b JM |
1545 | if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { |
1546 | if (maxkeylen < 8) { | |
f049052b BG |
1547 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1548 | "WPA: Too short maxkeylen (%lu)", | |
1549 | (unsigned long) maxkeylen); | |
6fc6879b JM |
1550 | return -1; |
1551 | } | |
1552 | maxkeylen -= 8; | |
1553 | } | |
1554 | ||
c397eff8 JM |
1555 | if (gtk_len > maxkeylen || |
1556 | wpa_supplicant_check_group_cipher(sm, sm->group_cipher, | |
1557 | gtk_len, maxkeylen, | |
6fc6879b JM |
1558 | &gd->key_rsc_len, &gd->alg)) |
1559 | return -1; | |
1560 | ||
c397eff8 | 1561 | gd->gtk_len = gtk_len; |
6fc6879b JM |
1562 | gd->keyidx = (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> |
1563 | WPA_KEY_INFO_KEY_INDEX_SHIFT; | |
98cd3d1c | 1564 | if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && sm->ptk.kek_len == 16) { |
7cb53ded JM |
1565 | #ifdef CONFIG_NO_RC4 |
1566 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, | |
1567 | "WPA: RC4 not supported in the build"); | |
1568 | return -1; | |
1569 | #else /* CONFIG_NO_RC4 */ | |
d2c33b91 | 1570 | u8 ek[32]; |
e6270129 | 1571 | if (key_data_len > sizeof(gd->gtk)) { |
f049052b BG |
1572 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1573 | "WPA: RC4 key data too long (%lu)", | |
e6270129 | 1574 | (unsigned long) key_data_len); |
6fc6879b JM |
1575 | return -1; |
1576 | } | |
d2c33b91 | 1577 | os_memcpy(ek, key->key_iv, 16); |
98cd3d1c | 1578 | os_memcpy(ek + 16, sm->ptk.kek, sm->ptk.kek_len); |
e6270129 JM |
1579 | os_memcpy(gd->gtk, key_data, key_data_len); |
1580 | if (rc4_skip(ek, 32, 256, gd->gtk, key_data_len)) { | |
d2c33b91 | 1581 | os_memset(ek, 0, sizeof(ek)); |
f049052b BG |
1582 | wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, |
1583 | "WPA: RC4 failed"); | |
7a215dfc JM |
1584 | return -1; |
1585 | } | |
d2c33b91 | 1586 | os_memset(ek, 0, sizeof(ek)); |
7cb53ded | 1587 | #endif /* CONFIG_NO_RC4 */ |
6fc6879b | 1588 | } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { |
e6270129 | 1589 | if (maxkeylen % 8) { |
f049052b BG |
1590 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1591 | "WPA: Unsupported AES-WRAP len %lu", | |
e6270129 | 1592 | (unsigned long) maxkeylen); |
6fc6879b JM |
1593 | return -1; |
1594 | } | |
1595 | if (maxkeylen > sizeof(gd->gtk)) { | |
f049052b BG |
1596 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1597 | "WPA: AES-WRAP key data " | |
1598 | "too long (keydatalen=%lu maxkeylen=%lu)", | |
e6270129 | 1599 | (unsigned long) key_data_len, |
f049052b | 1600 | (unsigned long) maxkeylen); |
6fc6879b JM |
1601 | return -1; |
1602 | } | |
98cd3d1c JM |
1603 | if (aes_unwrap(sm->ptk.kek, sm->ptk.kek_len, maxkeylen / 8, |
1604 | key_data, gd->gtk)) { | |
f049052b BG |
1605 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1606 | "WPA: AES unwrap failed - could not decrypt " | |
1607 | "GTK"); | |
6fc6879b JM |
1608 | return -1; |
1609 | } | |
1610 | } else { | |
f049052b BG |
1611 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1612 | "WPA: Unsupported key_info type %d", ver); | |
6fc6879b JM |
1613 | return -1; |
1614 | } | |
1615 | gd->tx = wpa_supplicant_gtk_tx_bit_workaround( | |
1616 | sm, !!(key_info & WPA_KEY_INFO_TXRX)); | |
1617 | return 0; | |
1618 | } | |
1619 | ||
1620 | ||
1621 | static int wpa_supplicant_send_2_of_2(struct wpa_sm *sm, | |
1622 | const struct wpa_eapol_key *key, | |
1623 | int ver, u16 key_info) | |
1624 | { | |
5e3b5197 | 1625 | size_t mic_len, hdrlen, rlen; |
6fc6879b | 1626 | struct wpa_eapol_key *reply; |
5e3b5197 | 1627 | u8 *rbuf, *key_mic; |
6fc6879b | 1628 | |
567da5bb | 1629 | mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len); |
6d014ffc | 1630 | hdrlen = sizeof(*reply) + mic_len + 2; |
6fc6879b | 1631 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, |
5e3b5197 | 1632 | hdrlen, &rlen, (void *) &reply); |
6fc6879b JM |
1633 | if (rbuf == NULL) |
1634 | return -1; | |
1635 | ||
a14896e8 JM |
1636 | reply->type = (sm->proto == WPA_PROTO_RSN || |
1637 | sm->proto == WPA_PROTO_OSEN) ? | |
6fc6879b JM |
1638 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; |
1639 | key_info &= WPA_KEY_INFO_KEY_INDEX_MASK; | |
4a26ccda JM |
1640 | key_info |= ver | WPA_KEY_INFO_SECURE; |
1641 | if (mic_len) | |
1642 | key_info |= WPA_KEY_INFO_MIC; | |
b44d1efd VK |
1643 | else |
1644 | key_info |= WPA_KEY_INFO_ENCR_KEY_DATA; | |
6fc6879b | 1645 | WPA_PUT_BE16(reply->key_info, key_info); |
a14896e8 | 1646 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) |
6fc6879b JM |
1647 | WPA_PUT_BE16(reply->key_length, 0); |
1648 | else | |
1649 | os_memcpy(reply->key_length, key->key_length, 2); | |
1650 | os_memcpy(reply->replay_counter, key->replay_counter, | |
1651 | WPA_REPLAY_COUNTER_LEN); | |
1652 | ||
6d014ffc JM |
1653 | key_mic = (u8 *) (reply + 1); |
1654 | WPA_PUT_BE16(key_mic + mic_len, 0); | |
6fc6879b | 1655 | |
f049052b | 1656 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/2"); |
1049af7e JM |
1657 | return wpa_eapol_key_send(sm, &sm->ptk, ver, sm->bssid, ETH_P_EAPOL, |
1658 | rbuf, rlen, key_mic); | |
6fc6879b JM |
1659 | } |
1660 | ||
1661 | ||
1662 | static void wpa_supplicant_process_1_of_2(struct wpa_sm *sm, | |
1663 | const unsigned char *src_addr, | |
1664 | const struct wpa_eapol_key *key, | |
e6270129 JM |
1665 | const u8 *key_data, |
1666 | size_t key_data_len, u16 ver) | |
6fc6879b | 1667 | { |
e6270129 | 1668 | u16 key_info; |
6fc6879b JM |
1669 | int rekey, ret; |
1670 | struct wpa_gtk_data gd; | |
73ed03f3 | 1671 | const u8 *key_rsc; |
6fc6879b | 1672 | |
04243740 | 1673 | if (!sm->msg_3_of_4_ok && !wpa_fils_is_completed(sm)) { |
761396e4 JM |
1674 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1675 | "WPA: Group Key Handshake started prior to completion of 4-way handshake"); | |
1676 | goto failed; | |
1677 | } | |
1678 | ||
6fc6879b JM |
1679 | os_memset(&gd, 0, sizeof(gd)); |
1680 | ||
1681 | rekey = wpa_sm_get_state(sm) == WPA_COMPLETED; | |
f049052b BG |
1682 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of Group Key " |
1683 | "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver); | |
6fc6879b JM |
1684 | |
1685 | key_info = WPA_GET_BE16(key->key_info); | |
6fc6879b | 1686 | |
a14896e8 | 1687 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { |
e6270129 JM |
1688 | ret = wpa_supplicant_process_1_of_2_rsn(sm, key_data, |
1689 | key_data_len, key_info, | |
6fc6879b JM |
1690 | &gd); |
1691 | } else { | |
e6270129 JM |
1692 | ret = wpa_supplicant_process_1_of_2_wpa(sm, key, key_data, |
1693 | key_data_len, | |
1694 | key_info, ver, &gd); | |
6fc6879b JM |
1695 | } |
1696 | ||
1697 | wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); | |
1698 | ||
1699 | if (ret) | |
83935317 | 1700 | goto failed; |
6fc6879b | 1701 | |
73ed03f3 MS |
1702 | key_rsc = key->key_rsc; |
1703 | if (wpa_supplicant_rsc_relaxation(sm, key->key_rsc)) | |
1704 | key_rsc = null_rsc; | |
1705 | ||
87e2db16 | 1706 | if (wpa_supplicant_install_gtk(sm, &gd, key_rsc, 0) || |
c93b7e18 | 1707 | wpa_supplicant_send_2_of_2(sm, key, ver, key_info) < 0) |
83935317 | 1708 | goto failed; |
fbfc974c | 1709 | os_memset(&gd, 0, sizeof(gd)); |
6fc6879b JM |
1710 | |
1711 | if (rekey) { | |
0f057fb2 | 1712 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Group rekeying " |
6fc6879b JM |
1713 | "completed with " MACSTR " [GTK=%s]", |
1714 | MAC2STR(sm->bssid), wpa_cipher_txt(sm->group_cipher)); | |
1715 | wpa_sm_cancel_auth_timeout(sm); | |
1716 | wpa_sm_set_state(sm, WPA_COMPLETED); | |
1717 | } else { | |
1718 | wpa_supplicant_key_neg_complete(sm, sm->bssid, | |
1719 | key_info & | |
1720 | WPA_KEY_INFO_SECURE); | |
1721 | } | |
392e68e8 SD |
1722 | |
1723 | wpa_sm_set_rekey_offload(sm); | |
1724 | ||
83935317 JM |
1725 | return; |
1726 | ||
1727 | failed: | |
fbfc974c | 1728 | os_memset(&gd, 0, sizeof(gd)); |
83935317 | 1729 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); |
6fc6879b JM |
1730 | } |
1731 | ||
1732 | ||
1733 | static int wpa_supplicant_verify_eapol_key_mic(struct wpa_sm *sm, | |
6d014ffc | 1734 | struct wpa_eapol_key *key, |
6fc6879b JM |
1735 | u16 ver, |
1736 | const u8 *buf, size_t len) | |
1737 | { | |
98cd3d1c | 1738 | u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN]; |
6fc6879b | 1739 | int ok = 0; |
567da5bb | 1740 | size_t mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len); |
6fc6879b | 1741 | |
6d014ffc | 1742 | os_memcpy(mic, key + 1, mic_len); |
6fc6879b | 1743 | if (sm->tptk_set) { |
6d014ffc | 1744 | os_memset(key + 1, 0, mic_len); |
a6ea6653 JM |
1745 | if (wpa_eapol_key_mic(sm->tptk.kck, sm->tptk.kck_len, |
1746 | sm->key_mgmt, | |
1747 | ver, buf, len, (u8 *) (key + 1)) < 0 || | |
1748 | os_memcmp_const(mic, key + 1, mic_len) != 0) { | |
f049052b BG |
1749 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1750 | "WPA: Invalid EAPOL-Key MIC " | |
1751 | "when using TPTK - ignoring TPTK"); | |
6fc6879b JM |
1752 | } else { |
1753 | ok = 1; | |
1754 | sm->tptk_set = 0; | |
1755 | sm->ptk_set = 1; | |
1756 | os_memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk)); | |
d2c33b91 | 1757 | os_memset(&sm->tptk, 0, sizeof(sm->tptk)); |
a00e946c MV |
1758 | /* |
1759 | * This assures the same TPTK in sm->tptk can never be | |
a68e0d86 | 1760 | * copied twice to sm->ptk as the new PTK. In |
a00e946c MV |
1761 | * combination with the installed flag in the wpa_ptk |
1762 | * struct, this assures the same PTK is only installed | |
1763 | * once. | |
1764 | */ | |
1765 | sm->renew_snonce = 1; | |
6fc6879b JM |
1766 | } |
1767 | } | |
1768 | ||
1769 | if (!ok && sm->ptk_set) { | |
6d014ffc | 1770 | os_memset(key + 1, 0, mic_len); |
a6ea6653 JM |
1771 | if (wpa_eapol_key_mic(sm->ptk.kck, sm->ptk.kck_len, |
1772 | sm->key_mgmt, | |
1773 | ver, buf, len, (u8 *) (key + 1)) < 0 || | |
1774 | os_memcmp_const(mic, key + 1, mic_len) != 0) { | |
f049052b BG |
1775 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1776 | "WPA: Invalid EAPOL-Key MIC - " | |
1777 | "dropping packet"); | |
6fc6879b JM |
1778 | return -1; |
1779 | } | |
1780 | ok = 1; | |
1781 | } | |
1782 | ||
1783 | if (!ok) { | |
f049052b BG |
1784 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1785 | "WPA: Could not verify EAPOL-Key MIC - " | |
1786 | "dropping packet"); | |
6fc6879b JM |
1787 | return -1; |
1788 | } | |
1789 | ||
1790 | os_memcpy(sm->rx_replay_counter, key->replay_counter, | |
1791 | WPA_REPLAY_COUNTER_LEN); | |
1792 | sm->rx_replay_counter_set = 1; | |
1793 | return 0; | |
1794 | } | |
1795 | ||
1796 | ||
1797 | /* Decrypt RSN EAPOL-Key key data (RC4 or AES-WRAP) */ | |
1798 | static int wpa_supplicant_decrypt_key_data(struct wpa_sm *sm, | |
6d014ffc JM |
1799 | struct wpa_eapol_key *key, |
1800 | size_t mic_len, u16 ver, | |
e6270129 | 1801 | u8 *key_data, size_t *key_data_len) |
6fc6879b | 1802 | { |
6fc6879b | 1803 | wpa_hexdump(MSG_DEBUG, "RSN: encrypted key data", |
e6270129 | 1804 | key_data, *key_data_len); |
6fc6879b | 1805 | if (!sm->ptk_set) { |
f049052b BG |
1806 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1807 | "WPA: PTK not available, cannot decrypt EAPOL-Key Key " | |
1808 | "Data"); | |
6fc6879b JM |
1809 | return -1; |
1810 | } | |
1811 | ||
1812 | /* Decrypt key data here so that this operation does not need | |
1813 | * to be implemented separately for each message type. */ | |
98cd3d1c | 1814 | if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && sm->ptk.kek_len == 16) { |
7cb53ded JM |
1815 | #ifdef CONFIG_NO_RC4 |
1816 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, | |
1817 | "WPA: RC4 not supported in the build"); | |
1818 | return -1; | |
1819 | #else /* CONFIG_NO_RC4 */ | |
6fc6879b | 1820 | u8 ek[32]; |
ef9627cb JM |
1821 | |
1822 | wpa_printf(MSG_DEBUG, "WPA: Decrypt Key Data using RC4"); | |
6fc6879b | 1823 | os_memcpy(ek, key->key_iv, 16); |
98cd3d1c | 1824 | os_memcpy(ek + 16, sm->ptk.kek, sm->ptk.kek_len); |
e6270129 | 1825 | if (rc4_skip(ek, 32, 256, key_data, *key_data_len)) { |
d2c33b91 | 1826 | os_memset(ek, 0, sizeof(ek)); |
f049052b BG |
1827 | wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, |
1828 | "WPA: RC4 failed"); | |
7a215dfc JM |
1829 | return -1; |
1830 | } | |
d2c33b91 | 1831 | os_memset(ek, 0, sizeof(ek)); |
7cb53ded | 1832 | #endif /* CONFIG_NO_RC4 */ |
6fc6879b | 1833 | } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || |
df0f01d9 | 1834 | ver == WPA_KEY_INFO_TYPE_AES_128_CMAC || |
4bc801ab | 1835 | wpa_use_aes_key_wrap(sm->key_mgmt)) { |
6fc6879b | 1836 | u8 *buf; |
ef9627cb JM |
1837 | |
1838 | wpa_printf(MSG_DEBUG, | |
1839 | "WPA: Decrypt Key Data using AES-UNWRAP (KEK length %u)", | |
1840 | (unsigned int) sm->ptk.kek_len); | |
e6270129 | 1841 | if (*key_data_len < 8 || *key_data_len % 8) { |
f049052b | 1842 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
e6270129 JM |
1843 | "WPA: Unsupported AES-WRAP len %u", |
1844 | (unsigned int) *key_data_len); | |
6fc6879b JM |
1845 | return -1; |
1846 | } | |
e6270129 JM |
1847 | *key_data_len -= 8; /* AES-WRAP adds 8 bytes */ |
1848 | buf = os_malloc(*key_data_len); | |
6fc6879b | 1849 | if (buf == NULL) { |
f049052b BG |
1850 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1851 | "WPA: No memory for AES-UNWRAP buffer"); | |
6fc6879b JM |
1852 | return -1; |
1853 | } | |
98cd3d1c | 1854 | if (aes_unwrap(sm->ptk.kek, sm->ptk.kek_len, *key_data_len / 8, |
e6270129 | 1855 | key_data, buf)) { |
cd5895e8 | 1856 | bin_clear_free(buf, *key_data_len); |
f049052b BG |
1857 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1858 | "WPA: AES unwrap failed - " | |
1859 | "could not decrypt EAPOL-Key key data"); | |
6fc6879b JM |
1860 | return -1; |
1861 | } | |
e6270129 | 1862 | os_memcpy(key_data, buf, *key_data_len); |
cd5895e8 | 1863 | bin_clear_free(buf, *key_data_len); |
6d014ffc | 1864 | WPA_PUT_BE16(((u8 *) (key + 1)) + mic_len, *key_data_len); |
6fc6879b | 1865 | } else { |
f049052b BG |
1866 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1867 | "WPA: Unsupported key_info type %d", ver); | |
6fc6879b JM |
1868 | return -1; |
1869 | } | |
1870 | wpa_hexdump_key(MSG_DEBUG, "WPA: decrypted EAPOL-Key key data", | |
e6270129 | 1871 | key_data, *key_data_len); |
6fc6879b JM |
1872 | return 0; |
1873 | } | |
1874 | ||
1875 | ||
1876 | /** | |
1877 | * wpa_sm_aborted_cached - Notify WPA that PMKSA caching was aborted | |
1878 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
1879 | */ | |
1880 | void wpa_sm_aborted_cached(struct wpa_sm *sm) | |
1881 | { | |
1882 | if (sm && sm->cur_pmksa) { | |
f049052b BG |
1883 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1884 | "RSN: Cancelling PMKSA caching attempt"); | |
6fc6879b JM |
1885 | sm->cur_pmksa = NULL; |
1886 | } | |
1887 | } | |
1888 | ||
1889 | ||
f049052b | 1890 | static void wpa_eapol_key_dump(struct wpa_sm *sm, |
5e3b5197 JM |
1891 | const struct wpa_eapol_key *key, |
1892 | unsigned int key_data_len, | |
1893 | const u8 *mic, unsigned int mic_len) | |
6fc6879b JM |
1894 | { |
1895 | #ifndef CONFIG_NO_STDOUT_DEBUG | |
1896 | u16 key_info = WPA_GET_BE16(key->key_info); | |
1897 | ||
f049052b BG |
1898 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, " EAPOL-Key type=%d", key->type); |
1899 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
1900 | " key_info 0x%x (ver=%d keyidx=%d rsvd=%d %s%s%s%s%s%s%s%s)", | |
1901 | key_info, key_info & WPA_KEY_INFO_TYPE_MASK, | |
1902 | (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> | |
1903 | WPA_KEY_INFO_KEY_INDEX_SHIFT, | |
1904 | (key_info & (BIT(13) | BIT(14) | BIT(15))) >> 13, | |
1905 | key_info & WPA_KEY_INFO_KEY_TYPE ? "Pairwise" : "Group", | |
1906 | key_info & WPA_KEY_INFO_INSTALL ? " Install" : "", | |
1907 | key_info & WPA_KEY_INFO_ACK ? " Ack" : "", | |
1908 | key_info & WPA_KEY_INFO_MIC ? " MIC" : "", | |
1909 | key_info & WPA_KEY_INFO_SECURE ? " Secure" : "", | |
1910 | key_info & WPA_KEY_INFO_ERROR ? " Error" : "", | |
1911 | key_info & WPA_KEY_INFO_REQUEST ? " Request" : "", | |
1912 | key_info & WPA_KEY_INFO_ENCR_KEY_DATA ? " Encr" : ""); | |
1913 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
1914 | " key_length=%u key_data_length=%u", | |
5e3b5197 | 1915 | WPA_GET_BE16(key->key_length), key_data_len); |
6fc6879b JM |
1916 | wpa_hexdump(MSG_DEBUG, " replay_counter", |
1917 | key->replay_counter, WPA_REPLAY_COUNTER_LEN); | |
1918 | wpa_hexdump(MSG_DEBUG, " key_nonce", key->key_nonce, WPA_NONCE_LEN); | |
1919 | wpa_hexdump(MSG_DEBUG, " key_iv", key->key_iv, 16); | |
1920 | wpa_hexdump(MSG_DEBUG, " key_rsc", key->key_rsc, 8); | |
1921 | wpa_hexdump(MSG_DEBUG, " key_id (reserved)", key->key_id, 8); | |
5e3b5197 | 1922 | wpa_hexdump(MSG_DEBUG, " key_mic", mic, mic_len); |
6fc6879b JM |
1923 | #endif /* CONFIG_NO_STDOUT_DEBUG */ |
1924 | } | |
1925 | ||
1926 | ||
0ab1dd01 JM |
1927 | #ifdef CONFIG_FILS |
1928 | static int wpa_supp_aead_decrypt(struct wpa_sm *sm, u8 *buf, size_t buf_len, | |
1929 | size_t *key_data_len) | |
1930 | { | |
1931 | struct wpa_ptk *ptk; | |
1932 | struct ieee802_1x_hdr *hdr; | |
1933 | struct wpa_eapol_key *key; | |
1934 | u8 *pos, *tmp; | |
1935 | const u8 *aad[1]; | |
1936 | size_t aad_len[1]; | |
1937 | ||
1938 | if (*key_data_len < AES_BLOCK_SIZE) { | |
1939 | wpa_printf(MSG_INFO, "No room for AES-SIV data in the frame"); | |
1940 | return -1; | |
1941 | } | |
1942 | ||
1943 | if (sm->tptk_set) | |
1944 | ptk = &sm->tptk; | |
1945 | else if (sm->ptk_set) | |
1946 | ptk = &sm->ptk; | |
1947 | else | |
1948 | return -1; | |
1949 | ||
1950 | hdr = (struct ieee802_1x_hdr *) buf; | |
1951 | key = (struct wpa_eapol_key *) (hdr + 1); | |
1952 | pos = (u8 *) (key + 1); | |
1953 | pos += 2; /* Pointing at the Encrypted Key Data field */ | |
1954 | ||
1955 | tmp = os_malloc(*key_data_len); | |
1956 | if (!tmp) | |
1957 | return -1; | |
1958 | ||
1959 | /* AES-SIV AAD from EAPOL protocol version field (inclusive) to | |
1960 | * to Key Data (exclusive). */ | |
1961 | aad[0] = buf; | |
1962 | aad_len[0] = pos - buf; | |
1963 | if (aes_siv_decrypt(ptk->kek, ptk->kek_len, pos, *key_data_len, | |
1964 | 1, aad, aad_len, tmp) < 0) { | |
1965 | wpa_printf(MSG_INFO, "Invalid AES-SIV data in the frame"); | |
1966 | bin_clear_free(tmp, *key_data_len); | |
1967 | return -1; | |
1968 | } | |
1969 | ||
1970 | /* AEAD decryption and validation completed successfully */ | |
1971 | (*key_data_len) -= AES_BLOCK_SIZE; | |
1972 | wpa_hexdump_key(MSG_DEBUG, "WPA: Decrypted Key Data", | |
1973 | tmp, *key_data_len); | |
1974 | ||
1975 | /* Replace Key Data field with the decrypted version */ | |
1976 | os_memcpy(pos, tmp, *key_data_len); | |
1977 | pos -= 2; /* Key Data Length field */ | |
1978 | WPA_PUT_BE16(pos, *key_data_len); | |
1979 | bin_clear_free(tmp, *key_data_len); | |
1980 | ||
1981 | if (sm->tptk_set) { | |
1982 | sm->tptk_set = 0; | |
1983 | sm->ptk_set = 1; | |
1984 | os_memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk)); | |
1985 | os_memset(&sm->tptk, 0, sizeof(sm->tptk)); | |
1986 | } | |
1987 | ||
1988 | os_memcpy(sm->rx_replay_counter, key->replay_counter, | |
1989 | WPA_REPLAY_COUNTER_LEN); | |
1990 | sm->rx_replay_counter_set = 1; | |
1991 | ||
1992 | return 0; | |
1993 | } | |
1994 | #endif /* CONFIG_FILS */ | |
1995 | ||
1996 | ||
6fc6879b JM |
1997 | /** |
1998 | * wpa_sm_rx_eapol - Process received WPA EAPOL frames | |
1999 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2000 | * @src_addr: Source MAC address of the EAPOL packet | |
2001 | * @buf: Pointer to the beginning of the EAPOL data (EAPOL header) | |
2002 | * @len: Length of the EAPOL frame | |
2003 | * Returns: 1 = WPA EAPOL-Key processed, 0 = not a WPA EAPOL-Key, -1 failure | |
2004 | * | |
2005 | * This function is called for each received EAPOL frame. Other than EAPOL-Key | |
2006 | * frames can be skipped if filtering is done elsewhere. wpa_sm_rx_eapol() is | |
2007 | * only processing WPA and WPA2 EAPOL-Key frames. | |
2008 | * | |
2009 | * The received EAPOL-Key packets are validated and valid packets are replied | |
2010 | * to. In addition, key material (PTK, GTK) is configured at the end of a | |
2011 | * successful key handshake. | |
2012 | */ | |
2013 | int wpa_sm_rx_eapol(struct wpa_sm *sm, const u8 *src_addr, | |
2014 | const u8 *buf, size_t len) | |
2015 | { | |
e6270129 | 2016 | size_t plen, data_len, key_data_len; |
d56d7e56 | 2017 | const struct ieee802_1x_hdr *hdr; |
6fc6879b JM |
2018 | struct wpa_eapol_key *key; |
2019 | u16 key_info, ver; | |
d56d7e56 | 2020 | u8 *tmp = NULL; |
6fc6879b | 2021 | int ret = -1; |
6d014ffc | 2022 | u8 *mic, *key_data; |
5e3b5197 | 2023 | size_t mic_len, keyhdrlen; |
6fc6879b JM |
2024 | |
2025 | #ifdef CONFIG_IEEE80211R | |
2026 | sm->ft_completed = 0; | |
2027 | #endif /* CONFIG_IEEE80211R */ | |
2028 | ||
567da5bb | 2029 | mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len); |
6d014ffc | 2030 | keyhdrlen = sizeof(*key) + mic_len + 2; |
5e3b5197 JM |
2031 | |
2032 | if (len < sizeof(*hdr) + keyhdrlen) { | |
f049052b BG |
2033 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2034 | "WPA: EAPOL frame too short to be a WPA " | |
2035 | "EAPOL-Key (len %lu, expecting at least %lu)", | |
2036 | (unsigned long) len, | |
5e3b5197 | 2037 | (unsigned long) sizeof(*hdr) + keyhdrlen); |
6fc6879b JM |
2038 | return 0; |
2039 | } | |
2040 | ||
d56d7e56 | 2041 | hdr = (const struct ieee802_1x_hdr *) buf; |
6fc6879b JM |
2042 | plen = be_to_host16(hdr->length); |
2043 | data_len = plen + sizeof(*hdr); | |
f049052b BG |
2044 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2045 | "IEEE 802.1X RX: version=%d type=%d length=%lu", | |
2046 | hdr->version, hdr->type, (unsigned long) plen); | |
6fc6879b JM |
2047 | |
2048 | if (hdr->version < EAPOL_VERSION) { | |
2049 | /* TODO: backwards compatibility */ | |
2050 | } | |
2051 | if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) { | |
f049052b BG |
2052 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2053 | "WPA: EAPOL frame (type %u) discarded, " | |
6fc6879b JM |
2054 | "not a Key frame", hdr->type); |
2055 | ret = 0; | |
2056 | goto out; | |
2057 | } | |
d56d7e56 | 2058 | wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL-Key", buf, len); |
5e3b5197 | 2059 | if (plen > len - sizeof(*hdr) || plen < keyhdrlen) { |
f049052b BG |
2060 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2061 | "WPA: EAPOL frame payload size %lu " | |
2062 | "invalid (frame size %lu)", | |
2063 | (unsigned long) plen, (unsigned long) len); | |
6fc6879b JM |
2064 | ret = 0; |
2065 | goto out; | |
2066 | } | |
d56d7e56 JM |
2067 | if (data_len < len) { |
2068 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
2069 | "WPA: ignoring %lu bytes after the IEEE 802.1X data", | |
2070 | (unsigned long) len - data_len); | |
2071 | } | |
2072 | ||
2073 | /* | |
2074 | * Make a copy of the frame since we need to modify the buffer during | |
2075 | * MAC validation and Key Data decryption. | |
2076 | */ | |
a1f11e34 | 2077 | tmp = os_memdup(buf, data_len); |
d56d7e56 JM |
2078 | if (tmp == NULL) |
2079 | goto out; | |
d56d7e56 | 2080 | key = (struct wpa_eapol_key *) (tmp + sizeof(struct ieee802_1x_hdr)); |
6d014ffc JM |
2081 | mic = (u8 *) (key + 1); |
2082 | key_data = mic + mic_len + 2; | |
6fc6879b JM |
2083 | |
2084 | if (key->type != EAPOL_KEY_TYPE_WPA && key->type != EAPOL_KEY_TYPE_RSN) | |
2085 | { | |
f049052b BG |
2086 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2087 | "WPA: EAPOL-Key type (%d) unknown, discarded", | |
2088 | key->type); | |
6fc6879b JM |
2089 | ret = 0; |
2090 | goto out; | |
2091 | } | |
6fc6879b | 2092 | |
6d014ffc JM |
2093 | key_data_len = WPA_GET_BE16(mic + mic_len); |
2094 | wpa_eapol_key_dump(sm, key, key_data_len, mic, mic_len); | |
5e3b5197 JM |
2095 | |
2096 | if (key_data_len > plen - keyhdrlen) { | |
d56d7e56 JM |
2097 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Invalid EAPOL-Key " |
2098 | "frame - key_data overflow (%u > %u)", | |
e6270129 | 2099 | (unsigned int) key_data_len, |
5e3b5197 | 2100 | (unsigned int) (plen - keyhdrlen)); |
d56d7e56 | 2101 | goto out; |
6fc6879b | 2102 | } |
d56d7e56 JM |
2103 | |
2104 | eapol_sm_notify_lower_layer_success(sm->eapol, 0); | |
6fc6879b JM |
2105 | key_info = WPA_GET_BE16(key->key_info); |
2106 | ver = key_info & WPA_KEY_INFO_TYPE_MASK; | |
2107 | if (ver != WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && | |
a20088e5 | 2108 | #if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W) |
6fc6879b | 2109 | ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && |
a20088e5 | 2110 | #endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */ |
df0f01d9 | 2111 | ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES && |
4bc801ab | 2112 | !wpa_use_akm_defined(sm->key_mgmt)) { |
f049052b BG |
2113 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
2114 | "WPA: Unsupported EAPOL-Key descriptor version %d", | |
2115 | ver); | |
6fc6879b JM |
2116 | goto out; |
2117 | } | |
2118 | ||
4bc801ab | 2119 | if (wpa_use_akm_defined(sm->key_mgmt) && |
929a2ea5 JM |
2120 | ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) { |
2121 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, | |
2122 | "RSN: Unsupported EAPOL-Key descriptor version %d (expected AKM defined = 0)", | |
2123 | ver); | |
2124 | goto out; | |
2125 | } | |
2126 | ||
6fc6879b | 2127 | #ifdef CONFIG_IEEE80211R |
56586197 | 2128 | if (wpa_key_mgmt_ft(sm->key_mgmt)) { |
6fc6879b | 2129 | /* IEEE 802.11r uses a new key_info type (AES-128-CMAC). */ |
4bc801ab JM |
2130 | if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && |
2131 | !wpa_use_akm_defined(sm->key_mgmt)) { | |
f049052b BG |
2132 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
2133 | "FT: AP did not use AES-128-CMAC"); | |
6fc6879b JM |
2134 | goto out; |
2135 | } | |
2136 | } else | |
2137 | #endif /* CONFIG_IEEE80211R */ | |
56586197 JM |
2138 | #ifdef CONFIG_IEEE80211W |
2139 | if (wpa_key_mgmt_sha256(sm->key_mgmt)) { | |
df0f01d9 | 2140 | if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && |
4bc801ab | 2141 | !wpa_use_akm_defined(sm->key_mgmt)) { |
f049052b BG |
2142 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
2143 | "WPA: AP did not use the " | |
2144 | "negotiated AES-128-CMAC"); | |
56586197 JM |
2145 | goto out; |
2146 | } | |
2147 | } else | |
2148 | #endif /* CONFIG_IEEE80211W */ | |
6fc6879b | 2149 | if (sm->pairwise_cipher == WPA_CIPHER_CCMP && |
4bc801ab | 2150 | !wpa_use_akm_defined(sm->key_mgmt) && |
6fc6879b | 2151 | ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { |
f049052b BG |
2152 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
2153 | "WPA: CCMP is used, but EAPOL-Key " | |
2154 | "descriptor version (%d) is not 2", ver); | |
6fc6879b JM |
2155 | if (sm->group_cipher != WPA_CIPHER_CCMP && |
2156 | !(key_info & WPA_KEY_INFO_KEY_TYPE)) { | |
2157 | /* Earlier versions of IEEE 802.11i did not explicitly | |
2158 | * require version 2 descriptor for all EAPOL-Key | |
2159 | * packets, so allow group keys to use version 1 if | |
2160 | * CCMP is not used for them. */ | |
f049052b BG |
2161 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
2162 | "WPA: Backwards compatibility: allow invalid " | |
2163 | "version for non-CCMP group keys"); | |
9f6a7cdd JM |
2164 | } else if (ver == WPA_KEY_INFO_TYPE_AES_128_CMAC) { |
2165 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, | |
2166 | "WPA: Interoperability workaround: allow incorrect (should have been HMAC-SHA1), but stronger (is AES-128-CMAC), descriptor version to be used"); | |
6fc6879b JM |
2167 | } else |
2168 | goto out; | |
801e1173 | 2169 | } else if (sm->pairwise_cipher == WPA_CIPHER_GCMP && |
4bc801ab | 2170 | !wpa_use_akm_defined(sm->key_mgmt) && |
801e1173 | 2171 | ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { |
eb7719ff JM |
2172 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
2173 | "WPA: GCMP is used, but EAPOL-Key " | |
2174 | "descriptor version (%d) is not 2", ver); | |
2175 | goto out; | |
2176 | } | |
6fc6879b | 2177 | |
a0bf1b68 | 2178 | if (sm->rx_replay_counter_set && |
6fc6879b JM |
2179 | os_memcmp(key->replay_counter, sm->rx_replay_counter, |
2180 | WPA_REPLAY_COUNTER_LEN) <= 0) { | |
f049052b BG |
2181 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
2182 | "WPA: EAPOL-Key Replay Counter did not increase - " | |
2183 | "dropping packet"); | |
6fc6879b JM |
2184 | goto out; |
2185 | } | |
2186 | ||
a0bf1b68 JM |
2187 | if (key_info & WPA_KEY_INFO_SMK_MESSAGE) { |
2188 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, | |
2189 | "WPA: Unsupported SMK bit in key_info"); | |
2190 | goto out; | |
2191 | } | |
2192 | ||
2193 | if (!(key_info & WPA_KEY_INFO_ACK)) { | |
f049052b BG |
2194 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
2195 | "WPA: No Ack bit in key_info"); | |
6fc6879b JM |
2196 | goto out; |
2197 | } | |
2198 | ||
2199 | if (key_info & WPA_KEY_INFO_REQUEST) { | |
f049052b BG |
2200 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
2201 | "WPA: EAPOL-Key with Request bit - dropped"); | |
6fc6879b JM |
2202 | goto out; |
2203 | } | |
2204 | ||
a0bf1b68 | 2205 | if ((key_info & WPA_KEY_INFO_MIC) && |
6d014ffc | 2206 | wpa_supplicant_verify_eapol_key_mic(sm, key, ver, tmp, data_len)) |
6fc6879b JM |
2207 | goto out; |
2208 | ||
0ab1dd01 JM |
2209 | #ifdef CONFIG_FILS |
2210 | if (!mic_len && (key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { | |
2211 | if (wpa_supp_aead_decrypt(sm, tmp, data_len, &key_data_len)) | |
2212 | goto out; | |
2213 | } | |
2214 | #endif /* CONFIG_FILS */ | |
2215 | ||
a14896e8 | 2216 | if ((sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) && |
0ab1dd01 | 2217 | (key_info & WPA_KEY_INFO_ENCR_KEY_DATA) && mic_len) { |
6d014ffc JM |
2218 | if (wpa_supplicant_decrypt_key_data(sm, key, mic_len, |
2219 | ver, key_data, | |
e6270129 | 2220 | &key_data_len)) |
d56d7e56 | 2221 | goto out; |
6fc6879b JM |
2222 | } |
2223 | ||
2224 | if (key_info & WPA_KEY_INFO_KEY_TYPE) { | |
2225 | if (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) { | |
f049052b BG |
2226 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
2227 | "WPA: Ignored EAPOL-Key (Pairwise) with " | |
2228 | "non-zero key index"); | |
6fc6879b JM |
2229 | goto out; |
2230 | } | |
a0bf1b68 JM |
2231 | if (key_info & (WPA_KEY_INFO_MIC | |
2232 | WPA_KEY_INFO_ENCR_KEY_DATA)) { | |
6fc6879b | 2233 | /* 3/4 4-Way Handshake */ |
e6270129 JM |
2234 | wpa_supplicant_process_3_of_4(sm, key, ver, key_data, |
2235 | key_data_len); | |
6fc6879b JM |
2236 | } else { |
2237 | /* 1/4 4-Way Handshake */ | |
2238 | wpa_supplicant_process_1_of_4(sm, src_addr, key, | |
e6270129 JM |
2239 | ver, key_data, |
2240 | key_data_len); | |
6fc6879b | 2241 | } |
6fc6879b | 2242 | } else { |
16eb4858 JM |
2243 | if ((mic_len && (key_info & WPA_KEY_INFO_MIC)) || |
2244 | (!mic_len && (key_info & WPA_KEY_INFO_ENCR_KEY_DATA))) { | |
6fc6879b JM |
2245 | /* 1/2 Group Key Handshake */ |
2246 | wpa_supplicant_process_1_of_2(sm, src_addr, key, | |
e6270129 JM |
2247 | key_data, key_data_len, |
2248 | ver); | |
6fc6879b | 2249 | } else { |
f049052b | 2250 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
16eb4858 | 2251 | "WPA: EAPOL-Key (Group) without Mic/Encr bit - " |
f049052b | 2252 | "dropped"); |
6fc6879b JM |
2253 | } |
2254 | } | |
2255 | ||
2256 | ret = 1; | |
2257 | ||
2258 | out: | |
fbfc974c | 2259 | bin_clear_free(tmp, data_len); |
6fc6879b JM |
2260 | return ret; |
2261 | } | |
2262 | ||
2263 | ||
2264 | #ifdef CONFIG_CTRL_IFACE | |
6fc6879b JM |
2265 | static u32 wpa_key_mgmt_suite(struct wpa_sm *sm) |
2266 | { | |
2267 | switch (sm->key_mgmt) { | |
2268 | case WPA_KEY_MGMT_IEEE8021X: | |
a14896e8 JM |
2269 | return ((sm->proto == WPA_PROTO_RSN || |
2270 | sm->proto == WPA_PROTO_OSEN) ? | |
6fc6879b JM |
2271 | RSN_AUTH_KEY_MGMT_UNSPEC_802_1X : |
2272 | WPA_AUTH_KEY_MGMT_UNSPEC_802_1X); | |
2273 | case WPA_KEY_MGMT_PSK: | |
2274 | return (sm->proto == WPA_PROTO_RSN ? | |
2275 | RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X : | |
2276 | WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X); | |
2277 | #ifdef CONFIG_IEEE80211R | |
2278 | case WPA_KEY_MGMT_FT_IEEE8021X: | |
2279 | return RSN_AUTH_KEY_MGMT_FT_802_1X; | |
2280 | case WPA_KEY_MGMT_FT_PSK: | |
2281 | return RSN_AUTH_KEY_MGMT_FT_PSK; | |
2282 | #endif /* CONFIG_IEEE80211R */ | |
56586197 JM |
2283 | #ifdef CONFIG_IEEE80211W |
2284 | case WPA_KEY_MGMT_IEEE8021X_SHA256: | |
2285 | return RSN_AUTH_KEY_MGMT_802_1X_SHA256; | |
2286 | case WPA_KEY_MGMT_PSK_SHA256: | |
2287 | return RSN_AUTH_KEY_MGMT_PSK_SHA256; | |
2288 | #endif /* CONFIG_IEEE80211W */ | |
369c8d7b JM |
2289 | case WPA_KEY_MGMT_CCKM: |
2290 | return (sm->proto == WPA_PROTO_RSN ? | |
2291 | RSN_AUTH_KEY_MGMT_CCKM: | |
2292 | WPA_AUTH_KEY_MGMT_CCKM); | |
6fc6879b JM |
2293 | case WPA_KEY_MGMT_WPA_NONE: |
2294 | return WPA_AUTH_KEY_MGMT_NONE; | |
666497c8 JM |
2295 | case WPA_KEY_MGMT_IEEE8021X_SUITE_B: |
2296 | return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B; | |
5e3b5197 JM |
2297 | case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192: |
2298 | return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192; | |
6fc6879b JM |
2299 | default: |
2300 | return 0; | |
2301 | } | |
2302 | } | |
2303 | ||
2304 | ||
6fc6879b JM |
2305 | #define RSN_SUITE "%02x-%02x-%02x-%d" |
2306 | #define RSN_SUITE_ARG(s) \ | |
2307 | ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff | |
2308 | ||
2309 | /** | |
2310 | * wpa_sm_get_mib - Dump text list of MIB entries | |
2311 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2312 | * @buf: Buffer for the list | |
2313 | * @buflen: Length of the buffer | |
2314 | * Returns: Number of bytes written to buffer | |
2315 | * | |
2316 | * This function is used fetch dot11 MIB variables. | |
2317 | */ | |
2318 | int wpa_sm_get_mib(struct wpa_sm *sm, char *buf, size_t buflen) | |
2319 | { | |
2320 | char pmkid_txt[PMKID_LEN * 2 + 1]; | |
2321 | int rsna, ret; | |
2322 | size_t len; | |
2323 | ||
2324 | if (sm->cur_pmksa) { | |
2325 | wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt), | |
2326 | sm->cur_pmksa->pmkid, PMKID_LEN); | |
2327 | } else | |
2328 | pmkid_txt[0] = '\0'; | |
2329 | ||
56586197 JM |
2330 | if ((wpa_key_mgmt_wpa_psk(sm->key_mgmt) || |
2331 | wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt)) && | |
6fc6879b JM |
2332 | sm->proto == WPA_PROTO_RSN) |
2333 | rsna = 1; | |
2334 | else | |
2335 | rsna = 0; | |
2336 | ||
2337 | ret = os_snprintf(buf, buflen, | |
2338 | "dot11RSNAOptionImplemented=TRUE\n" | |
2339 | "dot11RSNAPreauthenticationImplemented=TRUE\n" | |
2340 | "dot11RSNAEnabled=%s\n" | |
2341 | "dot11RSNAPreauthenticationEnabled=%s\n" | |
2342 | "dot11RSNAConfigVersion=%d\n" | |
2343 | "dot11RSNAConfigPairwiseKeysSupported=5\n" | |
2344 | "dot11RSNAConfigGroupCipherSize=%d\n" | |
2345 | "dot11RSNAConfigPMKLifetime=%d\n" | |
2346 | "dot11RSNAConfigPMKReauthThreshold=%d\n" | |
2347 | "dot11RSNAConfigNumberOfPTKSAReplayCounters=1\n" | |
2348 | "dot11RSNAConfigSATimeout=%d\n", | |
2349 | rsna ? "TRUE" : "FALSE", | |
2350 | rsna ? "TRUE" : "FALSE", | |
2351 | RSN_VERSION, | |
c3550295 | 2352 | wpa_cipher_key_len(sm->group_cipher) * 8, |
6fc6879b JM |
2353 | sm->dot11RSNAConfigPMKLifetime, |
2354 | sm->dot11RSNAConfigPMKReauthThreshold, | |
2355 | sm->dot11RSNAConfigSATimeout); | |
d85e1fc8 | 2356 | if (os_snprintf_error(buflen, ret)) |
6fc6879b JM |
2357 | return 0; |
2358 | len = ret; | |
2359 | ||
2360 | ret = os_snprintf( | |
2361 | buf + len, buflen - len, | |
2362 | "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n" | |
2363 | "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n" | |
2364 | "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n" | |
2365 | "dot11RSNAPMKIDUsed=%s\n" | |
2366 | "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n" | |
2367 | "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n" | |
2368 | "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n" | |
2369 | "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n" | |
2370 | "dot11RSNA4WayHandshakeFailures=%u\n", | |
2371 | RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)), | |
c3550295 JM |
2372 | RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, |
2373 | sm->pairwise_cipher)), | |
2374 | RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, | |
2375 | sm->group_cipher)), | |
6fc6879b JM |
2376 | pmkid_txt, |
2377 | RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)), | |
c3550295 JM |
2378 | RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, |
2379 | sm->pairwise_cipher)), | |
2380 | RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, | |
2381 | sm->group_cipher)), | |
6fc6879b | 2382 | sm->dot11RSNA4WayHandshakeFailures); |
1f102d3b | 2383 | if (!os_snprintf_error(buflen - len, ret)) |
6fc6879b JM |
2384 | len += ret; |
2385 | ||
2386 | return (int) len; | |
2387 | } | |
2388 | #endif /* CONFIG_CTRL_IFACE */ | |
2389 | ||
2390 | ||
2391 | static void wpa_sm_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry, | |
6aaac006 | 2392 | void *ctx, enum pmksa_free_reason reason) |
6fc6879b JM |
2393 | { |
2394 | struct wpa_sm *sm = ctx; | |
6aaac006 | 2395 | int deauth = 0; |
6fc6879b | 2396 | |
6aaac006 DW |
2397 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: PMKSA cache entry free_cb: " |
2398 | MACSTR " reason=%d", MAC2STR(entry->aa), reason); | |
2399 | ||
2400 | if (sm->cur_pmksa == entry) { | |
2401 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
2402 | "RSN: %s current PMKSA entry", | |
2403 | reason == PMKSA_REPLACE ? "replaced" : "removed"); | |
2404 | pmksa_cache_clear_current(sm); | |
2405 | ||
2406 | /* | |
2407 | * If an entry is simply being replaced, there's no need to | |
2408 | * deauthenticate because it will be immediately re-added. | |
2409 | * This happens when EAP authentication is completed again | |
2410 | * (reauth or failed PMKSA caching attempt). | |
2411 | */ | |
2412 | if (reason != PMKSA_REPLACE) | |
2413 | deauth = 1; | |
2414 | } | |
2415 | ||
2416 | if (reason == PMKSA_EXPIRE && | |
6fc6879b JM |
2417 | (sm->pmk_len == entry->pmk_len && |
2418 | os_memcmp(sm->pmk, entry->pmk, sm->pmk_len) == 0)) { | |
f049052b | 2419 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
6aaac006 DW |
2420 | "RSN: deauthenticating due to expired PMK"); |
2421 | pmksa_cache_clear_current(sm); | |
2422 | deauth = 1; | |
2423 | } | |
6fc6879b | 2424 | |
6aaac006 | 2425 | if (deauth) { |
1bd13110 | 2426 | sm->pmk_len = 0; |
6fc6879b JM |
2427 | os_memset(sm->pmk, 0, sizeof(sm->pmk)); |
2428 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); | |
6fc6879b JM |
2429 | } |
2430 | } | |
2431 | ||
2432 | ||
2433 | /** | |
2434 | * wpa_sm_init - Initialize WPA state machine | |
2435 | * @ctx: Context pointer for callbacks; this needs to be an allocated buffer | |
2436 | * Returns: Pointer to the allocated WPA state machine data | |
2437 | * | |
2438 | * This function is used to allocate a new WPA state machine and the returned | |
2439 | * value is passed to all WPA state machine calls. | |
2440 | */ | |
2441 | struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx) | |
2442 | { | |
2443 | struct wpa_sm *sm; | |
2444 | ||
2445 | sm = os_zalloc(sizeof(*sm)); | |
2446 | if (sm == NULL) | |
2447 | return NULL; | |
c5b26e33 | 2448 | dl_list_init(&sm->pmksa_candidates); |
6fc6879b JM |
2449 | sm->renew_snonce = 1; |
2450 | sm->ctx = ctx; | |
2451 | ||
2452 | sm->dot11RSNAConfigPMKLifetime = 43200; | |
2453 | sm->dot11RSNAConfigPMKReauthThreshold = 70; | |
2454 | sm->dot11RSNAConfigSATimeout = 60; | |
2455 | ||
2456 | sm->pmksa = pmksa_cache_init(wpa_sm_pmksa_free_cb, sm, sm); | |
2457 | if (sm->pmksa == NULL) { | |
f049052b BG |
2458 | wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, |
2459 | "RSN: PMKSA cache initialization failed"); | |
6fc6879b JM |
2460 | os_free(sm); |
2461 | return NULL; | |
2462 | } | |
2463 | ||
2464 | return sm; | |
2465 | } | |
2466 | ||
2467 | ||
2468 | /** | |
2469 | * wpa_sm_deinit - Deinitialize WPA state machine | |
2470 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2471 | */ | |
2472 | void wpa_sm_deinit(struct wpa_sm *sm) | |
2473 | { | |
2474 | if (sm == NULL) | |
2475 | return; | |
2476 | pmksa_cache_deinit(sm->pmksa); | |
2477 | eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL); | |
581a8cde | 2478 | eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); |
6fc6879b JM |
2479 | os_free(sm->assoc_wpa_ie); |
2480 | os_free(sm->ap_wpa_ie); | |
2481 | os_free(sm->ap_rsn_ie); | |
71932544 | 2482 | wpa_sm_drop_sa(sm); |
6fc6879b | 2483 | os_free(sm->ctx); |
55046414 JM |
2484 | #ifdef CONFIG_IEEE80211R |
2485 | os_free(sm->assoc_resp_ies); | |
2486 | #endif /* CONFIG_IEEE80211R */ | |
651c6a84 JM |
2487 | #ifdef CONFIG_TESTING_OPTIONS |
2488 | wpabuf_free(sm->test_assoc_ie); | |
2489 | #endif /* CONFIG_TESTING_OPTIONS */ | |
0119d442 | 2490 | #ifdef CONFIG_FILS_SK_PFS |
76e20f4f | 2491 | crypto_ecdh_deinit(sm->fils_ecdh); |
0119d442 | 2492 | #endif /* CONFIG_FILS_SK_PFS */ |
7d440a3b JM |
2493 | #ifdef CONFIG_FILS |
2494 | wpabuf_free(sm->fils_ft_ies); | |
2495 | #endif /* CONFIG_FILS */ | |
0a614799 JM |
2496 | #ifdef CONFIG_OWE |
2497 | crypto_ecdh_deinit(sm->owe_ecdh); | |
2498 | #endif /* CONFIG_OWE */ | |
6fc6879b JM |
2499 | os_free(sm); |
2500 | } | |
2501 | ||
2502 | ||
2503 | /** | |
2504 | * wpa_sm_notify_assoc - Notify WPA state machine about association | |
2505 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2506 | * @bssid: The BSSID of the new association | |
2507 | * | |
2508 | * This function is called to let WPA state machine know that the connection | |
2509 | * was established. | |
2510 | */ | |
2511 | void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid) | |
2512 | { | |
cb5132bb | 2513 | int clear_keys = 1; |
58a98fb0 | 2514 | |
6fc6879b JM |
2515 | if (sm == NULL) |
2516 | return; | |
2517 | ||
f049052b BG |
2518 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2519 | "WPA: Association event - clear replay counter"); | |
6fc6879b JM |
2520 | os_memcpy(sm->bssid, bssid, ETH_ALEN); |
2521 | os_memset(sm->rx_replay_counter, 0, WPA_REPLAY_COUNTER_LEN); | |
2522 | sm->rx_replay_counter_set = 0; | |
2523 | sm->renew_snonce = 1; | |
2524 | if (os_memcmp(sm->preauth_bssid, bssid, ETH_ALEN) == 0) | |
2525 | rsn_preauth_deinit(sm); | |
2526 | ||
2527 | #ifdef CONFIG_IEEE80211R | |
58a98fb0 | 2528 | if (wpa_ft_is_completed(sm)) { |
5d5a9f00 JM |
2529 | /* |
2530 | * Clear portValid to kick EAPOL state machine to re-enter | |
2531 | * AUTHENTICATED state to get the EAPOL port Authorized. | |
2532 | */ | |
2533 | eapol_sm_notify_portValid(sm->eapol, FALSE); | |
6fc6879b JM |
2534 | wpa_supplicant_key_neg_complete(sm, sm->bssid, 1); |
2535 | ||
2536 | /* Prepare for the next transition */ | |
76b7981d | 2537 | wpa_ft_prepare_auth_request(sm, NULL); |
58a98fb0 | 2538 | |
cb5132bb | 2539 | clear_keys = 0; |
6fc6879b JM |
2540 | } |
2541 | #endif /* CONFIG_IEEE80211R */ | |
706df429 JM |
2542 | #ifdef CONFIG_FILS |
2543 | if (sm->fils_completed) { | |
2544 | /* | |
2545 | * Clear portValid to kick EAPOL state machine to re-enter | |
2546 | * AUTHENTICATED state to get the EAPOL port Authorized. | |
2547 | */ | |
2548 | wpa_supplicant_key_neg_complete(sm, sm->bssid, 1); | |
cb5132bb | 2549 | clear_keys = 0; |
706df429 JM |
2550 | } |
2551 | #endif /* CONFIG_FILS */ | |
58a98fb0 | 2552 | |
cb5132bb | 2553 | if (clear_keys) { |
58a98fb0 JM |
2554 | /* |
2555 | * IEEE 802.11, 8.4.10: Delete PTK SA on (re)association if | |
2556 | * this is not part of a Fast BSS Transition. | |
2557 | */ | |
f049052b | 2558 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PTK"); |
58a98fb0 | 2559 | sm->ptk_set = 0; |
d2c33b91 | 2560 | os_memset(&sm->ptk, 0, sizeof(sm->ptk)); |
58a98fb0 | 2561 | sm->tptk_set = 0; |
d2c33b91 | 2562 | os_memset(&sm->tptk, 0, sizeof(sm->tptk)); |
cb5132bb | 2563 | os_memset(&sm->gtk, 0, sizeof(sm->gtk)); |
87e2db16 | 2564 | os_memset(&sm->gtk_wnm_sleep, 0, sizeof(sm->gtk_wnm_sleep)); |
cb5132bb MV |
2565 | #ifdef CONFIG_IEEE80211W |
2566 | os_memset(&sm->igtk, 0, sizeof(sm->igtk)); | |
87e2db16 | 2567 | os_memset(&sm->igtk_wnm_sleep, 0, sizeof(sm->igtk_wnm_sleep)); |
cb5132bb | 2568 | #endif /* CONFIG_IEEE80211W */ |
58a98fb0 | 2569 | } |
40cf22e6 JM |
2570 | |
2571 | #ifdef CONFIG_TDLS | |
2572 | wpa_tdls_assoc(sm); | |
2573 | #endif /* CONFIG_TDLS */ | |
25ef8529 JM |
2574 | |
2575 | #ifdef CONFIG_P2P | |
2576 | os_memset(sm->p2p_ip_addr, 0, sizeof(sm->p2p_ip_addr)); | |
2577 | #endif /* CONFIG_P2P */ | |
6fc6879b JM |
2578 | } |
2579 | ||
2580 | ||
2581 | /** | |
2582 | * wpa_sm_notify_disassoc - Notify WPA state machine about disassociation | |
2583 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2584 | * | |
2585 | * This function is called to let WPA state machine know that the connection | |
2586 | * was lost. This will abort any existing pre-authentication session. | |
2587 | */ | |
2588 | void wpa_sm_notify_disassoc(struct wpa_sm *sm) | |
2589 | { | |
ac8e074e JM |
2590 | eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL); |
2591 | eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); | |
6fc6879b | 2592 | rsn_preauth_deinit(sm); |
0639970d | 2593 | pmksa_cache_clear_current(sm); |
6fc6879b JM |
2594 | if (wpa_sm_get_state(sm) == WPA_4WAY_HANDSHAKE) |
2595 | sm->dot11RSNA4WayHandshakeFailures++; | |
40cf22e6 JM |
2596 | #ifdef CONFIG_TDLS |
2597 | wpa_tdls_disassoc(sm); | |
2598 | #endif /* CONFIG_TDLS */ | |
706df429 JM |
2599 | #ifdef CONFIG_FILS |
2600 | sm->fils_completed = 0; | |
2601 | #endif /* CONFIG_FILS */ | |
2a9c5217 JM |
2602 | #ifdef CONFIG_IEEE80211R |
2603 | sm->ft_reassoc_completed = 0; | |
2604 | #endif /* CONFIG_IEEE80211R */ | |
71932544 JM |
2605 | |
2606 | /* Keys are not needed in the WPA state machine anymore */ | |
2607 | wpa_sm_drop_sa(sm); | |
761396e4 JM |
2608 | |
2609 | sm->msg_3_of_4_ok = 0; | |
c0fe5f12 | 2610 | os_memset(sm->bssid, 0, ETH_ALEN); |
6fc6879b JM |
2611 | } |
2612 | ||
2613 | ||
2614 | /** | |
2615 | * wpa_sm_set_pmk - Set PMK | |
2616 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2617 | * @pmk: The new PMK | |
2618 | * @pmk_len: The length of the new PMK in bytes | |
70c93963 | 2619 | * @pmkid: Calculated PMKID |
bc26ac50 | 2620 | * @bssid: AA to add into PMKSA cache or %NULL to not cache the PMK |
6fc6879b JM |
2621 | * |
2622 | * Configure the PMK for WPA state machine. | |
2623 | */ | |
bc26ac50 | 2624 | void wpa_sm_set_pmk(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len, |
70c93963 | 2625 | const u8 *pmkid, const u8 *bssid) |
6fc6879b JM |
2626 | { |
2627 | if (sm == NULL) | |
2628 | return; | |
2629 | ||
00583ef1 JM |
2630 | wpa_hexdump_key(MSG_DEBUG, "WPA: Set PMK based on external data", |
2631 | pmk, pmk_len); | |
6fc6879b JM |
2632 | sm->pmk_len = pmk_len; |
2633 | os_memcpy(sm->pmk, pmk, pmk_len); | |
2634 | ||
2635 | #ifdef CONFIG_IEEE80211R | |
2636 | /* Set XXKey to be PSK for FT key derivation */ | |
2637 | sm->xxkey_len = pmk_len; | |
2638 | os_memcpy(sm->xxkey, pmk, pmk_len); | |
2639 | #endif /* CONFIG_IEEE80211R */ | |
bc26ac50 JM |
2640 | |
2641 | if (bssid) { | |
70c93963 | 2642 | pmksa_cache_add(sm->pmksa, pmk, pmk_len, pmkid, NULL, 0, |
087a1f4e | 2643 | bssid, sm->own_addr, |
869af307 | 2644 | sm->network_ctx, sm->key_mgmt, NULL); |
bc26ac50 | 2645 | } |
6fc6879b JM |
2646 | } |
2647 | ||
2648 | ||
2649 | /** | |
2650 | * wpa_sm_set_pmk_from_pmksa - Set PMK based on the current PMKSA | |
2651 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2652 | * | |
2653 | * Take the PMK from the current PMKSA into use. If no PMKSA is active, the PMK | |
2654 | * will be cleared. | |
2655 | */ | |
2656 | void wpa_sm_set_pmk_from_pmksa(struct wpa_sm *sm) | |
2657 | { | |
2658 | if (sm == NULL) | |
2659 | return; | |
2660 | ||
2661 | if (sm->cur_pmksa) { | |
00583ef1 JM |
2662 | wpa_hexdump_key(MSG_DEBUG, |
2663 | "WPA: Set PMK based on current PMKSA", | |
2664 | sm->cur_pmksa->pmk, sm->cur_pmksa->pmk_len); | |
6fc6879b JM |
2665 | sm->pmk_len = sm->cur_pmksa->pmk_len; |
2666 | os_memcpy(sm->pmk, sm->cur_pmksa->pmk, sm->pmk_len); | |
2667 | } else { | |
00583ef1 | 2668 | wpa_printf(MSG_DEBUG, "WPA: No current PMKSA - clear PMK"); |
b488a129 JM |
2669 | sm->pmk_len = 0; |
2670 | os_memset(sm->pmk, 0, PMK_LEN_MAX); | |
6fc6879b JM |
2671 | } |
2672 | } | |
2673 | ||
2674 | ||
2675 | /** | |
2676 | * wpa_sm_set_fast_reauth - Set fast reauthentication (EAP) enabled/disabled | |
2677 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2678 | * @fast_reauth: Whether fast reauthentication (EAP) is allowed | |
2679 | */ | |
2680 | void wpa_sm_set_fast_reauth(struct wpa_sm *sm, int fast_reauth) | |
2681 | { | |
2682 | if (sm) | |
2683 | sm->fast_reauth = fast_reauth; | |
2684 | } | |
2685 | ||
2686 | ||
2687 | /** | |
2688 | * wpa_sm_set_scard_ctx - Set context pointer for smartcard callbacks | |
2689 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2690 | * @scard_ctx: Context pointer for smartcard related callback functions | |
2691 | */ | |
2692 | void wpa_sm_set_scard_ctx(struct wpa_sm *sm, void *scard_ctx) | |
2693 | { | |
2694 | if (sm == NULL) | |
2695 | return; | |
2696 | sm->scard_ctx = scard_ctx; | |
2697 | if (sm->preauth_eapol) | |
2698 | eapol_sm_register_scard_ctx(sm->preauth_eapol, scard_ctx); | |
2699 | } | |
2700 | ||
2701 | ||
2702 | /** | |
2703 | * wpa_sm_set_config - Notification of current configration change | |
2704 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2705 | * @config: Pointer to current network configuration | |
2706 | * | |
2707 | * Notify WPA state machine that configuration has changed. config will be | |
2708 | * stored as a backpointer to network configuration. This can be %NULL to clear | |
2709 | * the stored pointed. | |
2710 | */ | |
2711 | void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config) | |
2712 | { | |
2713 | if (!sm) | |
2714 | return; | |
2715 | ||
6fc6879b | 2716 | if (config) { |
886a807f | 2717 | sm->network_ctx = config->network_ctx; |
6fc6879b JM |
2718 | sm->allowed_pairwise_cipher = config->allowed_pairwise_cipher; |
2719 | sm->proactive_key_caching = config->proactive_key_caching; | |
2720 | sm->eap_workaround = config->eap_workaround; | |
2721 | sm->eap_conf_ctx = config->eap_conf_ctx; | |
2722 | if (config->ssid) { | |
2723 | os_memcpy(sm->ssid, config->ssid, config->ssid_len); | |
2724 | sm->ssid_len = config->ssid_len; | |
2725 | } else | |
2726 | sm->ssid_len = 0; | |
581a8cde | 2727 | sm->wpa_ptk_rekey = config->wpa_ptk_rekey; |
25ef8529 | 2728 | sm->p2p = config->p2p; |
73ed03f3 | 2729 | sm->wpa_rsc_relaxation = config->wpa_rsc_relaxation; |
869af307 JM |
2730 | #ifdef CONFIG_FILS |
2731 | if (config->fils_cache_id) { | |
2732 | sm->fils_cache_id_set = 1; | |
2733 | os_memcpy(sm->fils_cache_id, config->fils_cache_id, | |
2734 | FILS_CACHE_ID_LEN); | |
2735 | } else { | |
2736 | sm->fils_cache_id_set = 0; | |
2737 | } | |
2738 | #endif /* CONFIG_FILS */ | |
6fc6879b | 2739 | } else { |
886a807f | 2740 | sm->network_ctx = NULL; |
6fc6879b JM |
2741 | sm->allowed_pairwise_cipher = 0; |
2742 | sm->proactive_key_caching = 0; | |
2743 | sm->eap_workaround = 0; | |
2744 | sm->eap_conf_ctx = NULL; | |
2745 | sm->ssid_len = 0; | |
581a8cde | 2746 | sm->wpa_ptk_rekey = 0; |
25ef8529 | 2747 | sm->p2p = 0; |
73ed03f3 | 2748 | sm->wpa_rsc_relaxation = 0; |
6fc6879b | 2749 | } |
6fc6879b JM |
2750 | } |
2751 | ||
2752 | ||
2753 | /** | |
2754 | * wpa_sm_set_own_addr - Set own MAC address | |
2755 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2756 | * @addr: Own MAC address | |
2757 | */ | |
2758 | void wpa_sm_set_own_addr(struct wpa_sm *sm, const u8 *addr) | |
2759 | { | |
2760 | if (sm) | |
2761 | os_memcpy(sm->own_addr, addr, ETH_ALEN); | |
2762 | } | |
2763 | ||
2764 | ||
2765 | /** | |
2766 | * wpa_sm_set_ifname - Set network interface name | |
2767 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2768 | * @ifname: Interface name | |
2769 | * @bridge_ifname: Optional bridge interface name (for pre-auth) | |
2770 | */ | |
2771 | void wpa_sm_set_ifname(struct wpa_sm *sm, const char *ifname, | |
2772 | const char *bridge_ifname) | |
2773 | { | |
2774 | if (sm) { | |
2775 | sm->ifname = ifname; | |
2776 | sm->bridge_ifname = bridge_ifname; | |
2777 | } | |
2778 | } | |
2779 | ||
2780 | ||
2781 | /** | |
2782 | * wpa_sm_set_eapol - Set EAPOL state machine pointer | |
2783 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2784 | * @eapol: Pointer to EAPOL state machine allocated with eapol_sm_init() | |
2785 | */ | |
2786 | void wpa_sm_set_eapol(struct wpa_sm *sm, struct eapol_sm *eapol) | |
2787 | { | |
2788 | if (sm) | |
2789 | sm->eapol = eapol; | |
2790 | } | |
2791 | ||
2792 | ||
2793 | /** | |
2794 | * wpa_sm_set_param - Set WPA state machine parameters | |
2795 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2796 | * @param: Parameter field | |
2797 | * @value: Parameter value | |
2798 | * Returns: 0 on success, -1 on failure | |
2799 | */ | |
2800 | int wpa_sm_set_param(struct wpa_sm *sm, enum wpa_sm_conf_params param, | |
2801 | unsigned int value) | |
2802 | { | |
2803 | int ret = 0; | |
2804 | ||
2805 | if (sm == NULL) | |
2806 | return -1; | |
2807 | ||
2808 | switch (param) { | |
2809 | case RSNA_PMK_LIFETIME: | |
2810 | if (value > 0) | |
2811 | sm->dot11RSNAConfigPMKLifetime = value; | |
2812 | else | |
2813 | ret = -1; | |
2814 | break; | |
2815 | case RSNA_PMK_REAUTH_THRESHOLD: | |
2816 | if (value > 0 && value <= 100) | |
2817 | sm->dot11RSNAConfigPMKReauthThreshold = value; | |
2818 | else | |
2819 | ret = -1; | |
2820 | break; | |
2821 | case RSNA_SA_TIMEOUT: | |
2822 | if (value > 0) | |
2823 | sm->dot11RSNAConfigSATimeout = value; | |
2824 | else | |
2825 | ret = -1; | |
2826 | break; | |
2827 | case WPA_PARAM_PROTO: | |
2828 | sm->proto = value; | |
2829 | break; | |
2830 | case WPA_PARAM_PAIRWISE: | |
2831 | sm->pairwise_cipher = value; | |
2832 | break; | |
2833 | case WPA_PARAM_GROUP: | |
2834 | sm->group_cipher = value; | |
2835 | break; | |
2836 | case WPA_PARAM_KEY_MGMT: | |
2837 | sm->key_mgmt = value; | |
2838 | break; | |
2839 | #ifdef CONFIG_IEEE80211W | |
2840 | case WPA_PARAM_MGMT_GROUP: | |
2841 | sm->mgmt_group_cipher = value; | |
2842 | break; | |
2843 | #endif /* CONFIG_IEEE80211W */ | |
2844 | case WPA_PARAM_RSN_ENABLED: | |
2845 | sm->rsn_enabled = value; | |
2846 | break; | |
e820cf95 JM |
2847 | case WPA_PARAM_MFP: |
2848 | sm->mfp = value; | |
2849 | break; | |
6fc6879b JM |
2850 | default: |
2851 | break; | |
2852 | } | |
2853 | ||
2854 | return ret; | |
2855 | } | |
2856 | ||
2857 | ||
6fc6879b JM |
2858 | /** |
2859 | * wpa_sm_get_status - Get WPA state machine | |
2860 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2861 | * @buf: Buffer for status information | |
2862 | * @buflen: Maximum buffer length | |
2863 | * @verbose: Whether to include verbose status information | |
2864 | * Returns: Number of bytes written to buf. | |
2865 | * | |
2866 | * Query WPA state machine for status information. This function fills in | |
2867 | * a text area with current status information. If the buffer (buf) is not | |
2868 | * large enough, status information will be truncated to fit the buffer. | |
2869 | */ | |
2870 | int wpa_sm_get_status(struct wpa_sm *sm, char *buf, size_t buflen, | |
2871 | int verbose) | |
2872 | { | |
2873 | char *pos = buf, *end = buf + buflen; | |
2874 | int ret; | |
2875 | ||
2876 | ret = os_snprintf(pos, end - pos, | |
2877 | "pairwise_cipher=%s\n" | |
2878 | "group_cipher=%s\n" | |
2879 | "key_mgmt=%s\n", | |
2880 | wpa_cipher_txt(sm->pairwise_cipher), | |
2881 | wpa_cipher_txt(sm->group_cipher), | |
2882 | wpa_key_mgmt_txt(sm->key_mgmt, sm->proto)); | |
d85e1fc8 | 2883 | if (os_snprintf_error(end - pos, ret)) |
6fc6879b JM |
2884 | return pos - buf; |
2885 | pos += ret; | |
13e1d2e2 JM |
2886 | |
2887 | if (sm->mfp != NO_MGMT_FRAME_PROTECTION && sm->ap_rsn_ie) { | |
2888 | struct wpa_ie_data rsn; | |
2889 | if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) | |
2890 | >= 0 && | |
2891 | rsn.capabilities & (WPA_CAPABILITY_MFPR | | |
2892 | WPA_CAPABILITY_MFPC)) { | |
3a5954ef JM |
2893 | ret = os_snprintf(pos, end - pos, "pmf=%d\n" |
2894 | "mgmt_group_cipher=%s\n", | |
13e1d2e2 | 2895 | (rsn.capabilities & |
3a5954ef JM |
2896 | WPA_CAPABILITY_MFPR) ? 2 : 1, |
2897 | wpa_cipher_txt( | |
2898 | sm->mgmt_group_cipher)); | |
d85e1fc8 | 2899 | if (os_snprintf_error(end - pos, ret)) |
13e1d2e2 JM |
2900 | return pos - buf; |
2901 | pos += ret; | |
2902 | } | |
2903 | } | |
2904 | ||
6fc6879b JM |
2905 | return pos - buf; |
2906 | } | |
2907 | ||
2908 | ||
ae8535b6 JM |
2909 | int wpa_sm_pmf_enabled(struct wpa_sm *sm) |
2910 | { | |
2911 | struct wpa_ie_data rsn; | |
2912 | ||
2913 | if (sm->mfp == NO_MGMT_FRAME_PROTECTION || !sm->ap_rsn_ie) | |
2914 | return 0; | |
2915 | ||
2916 | if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) >= 0 && | |
2917 | rsn.capabilities & (WPA_CAPABILITY_MFPR | WPA_CAPABILITY_MFPC)) | |
2918 | return 1; | |
2919 | ||
2920 | return 0; | |
2921 | } | |
2922 | ||
2923 | ||
6fc6879b JM |
2924 | /** |
2925 | * wpa_sm_set_assoc_wpa_ie_default - Generate own WPA/RSN IE from configuration | |
2926 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2927 | * @wpa_ie: Pointer to buffer for WPA/RSN IE | |
2928 | * @wpa_ie_len: Pointer to the length of the wpa_ie buffer | |
2929 | * Returns: 0 on success, -1 on failure | |
2930 | */ | |
2931 | int wpa_sm_set_assoc_wpa_ie_default(struct wpa_sm *sm, u8 *wpa_ie, | |
2932 | size_t *wpa_ie_len) | |
2933 | { | |
2934 | int res; | |
2935 | ||
2936 | if (sm == NULL) | |
2937 | return -1; | |
2938 | ||
651c6a84 JM |
2939 | #ifdef CONFIG_TESTING_OPTIONS |
2940 | if (sm->test_assoc_ie) { | |
2941 | wpa_printf(MSG_DEBUG, | |
2942 | "TESTING: Replace association WPA/RSN IE"); | |
2943 | if (*wpa_ie_len < wpabuf_len(sm->test_assoc_ie)) | |
2944 | return -1; | |
2945 | os_memcpy(wpa_ie, wpabuf_head(sm->test_assoc_ie), | |
2946 | wpabuf_len(sm->test_assoc_ie)); | |
2947 | res = wpabuf_len(sm->test_assoc_ie); | |
2948 | } else | |
2949 | #endif /* CONFIG_TESTING_OPTIONS */ | |
6fc6879b JM |
2950 | res = wpa_gen_wpa_ie(sm, wpa_ie, *wpa_ie_len); |
2951 | if (res < 0) | |
2952 | return -1; | |
2953 | *wpa_ie_len = res; | |
2954 | ||
2955 | wpa_hexdump(MSG_DEBUG, "WPA: Set own WPA IE default", | |
2956 | wpa_ie, *wpa_ie_len); | |
2957 | ||
2958 | if (sm->assoc_wpa_ie == NULL) { | |
2959 | /* | |
2960 | * Make a copy of the WPA/RSN IE so that 4-Way Handshake gets | |
2961 | * the correct version of the IE even if PMKSA caching is | |
2962 | * aborted (which would remove PMKID from IE generation). | |
2963 | */ | |
a1f11e34 | 2964 | sm->assoc_wpa_ie = os_memdup(wpa_ie, *wpa_ie_len); |
6fc6879b JM |
2965 | if (sm->assoc_wpa_ie == NULL) |
2966 | return -1; | |
2967 | ||
6fc6879b | 2968 | sm->assoc_wpa_ie_len = *wpa_ie_len; |
0866ed00 JM |
2969 | } else { |
2970 | wpa_hexdump(MSG_DEBUG, | |
2971 | "WPA: Leave previously set WPA IE default", | |
2972 | sm->assoc_wpa_ie, sm->assoc_wpa_ie_len); | |
6fc6879b JM |
2973 | } |
2974 | ||
2975 | return 0; | |
2976 | } | |
2977 | ||
2978 | ||
2979 | /** | |
2980 | * wpa_sm_set_assoc_wpa_ie - Set own WPA/RSN IE from (Re)AssocReq | |
2981 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2982 | * @ie: Pointer to IE data (starting from id) | |
2983 | * @len: IE length | |
2984 | * Returns: 0 on success, -1 on failure | |
2985 | * | |
2986 | * Inform WPA state machine about the WPA/RSN IE used in (Re)Association | |
2987 | * Request frame. The IE will be used to override the default value generated | |
2988 | * with wpa_sm_set_assoc_wpa_ie_default(). | |
2989 | */ | |
2990 | int wpa_sm_set_assoc_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len) | |
2991 | { | |
2992 | if (sm == NULL) | |
2993 | return -1; | |
2994 | ||
2995 | os_free(sm->assoc_wpa_ie); | |
2996 | if (ie == NULL || len == 0) { | |
f049052b BG |
2997 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2998 | "WPA: clearing own WPA/RSN IE"); | |
6fc6879b JM |
2999 | sm->assoc_wpa_ie = NULL; |
3000 | sm->assoc_wpa_ie_len = 0; | |
3001 | } else { | |
3002 | wpa_hexdump(MSG_DEBUG, "WPA: set own WPA/RSN IE", ie, len); | |
a1f11e34 | 3003 | sm->assoc_wpa_ie = os_memdup(ie, len); |
6fc6879b JM |
3004 | if (sm->assoc_wpa_ie == NULL) |
3005 | return -1; | |
3006 | ||
6fc6879b JM |
3007 | sm->assoc_wpa_ie_len = len; |
3008 | } | |
3009 | ||
3010 | return 0; | |
3011 | } | |
3012 | ||
3013 | ||
3014 | /** | |
3015 | * wpa_sm_set_ap_wpa_ie - Set AP WPA IE from Beacon/ProbeResp | |
3016 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
3017 | * @ie: Pointer to IE data (starting from id) | |
3018 | * @len: IE length | |
3019 | * Returns: 0 on success, -1 on failure | |
3020 | * | |
3021 | * Inform WPA state machine about the WPA IE used in Beacon / Probe Response | |
3022 | * frame. | |
3023 | */ | |
3024 | int wpa_sm_set_ap_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len) | |
3025 | { | |
3026 | if (sm == NULL) | |
3027 | return -1; | |
3028 | ||
3029 | os_free(sm->ap_wpa_ie); | |
3030 | if (ie == NULL || len == 0) { | |
f049052b BG |
3031 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
3032 | "WPA: clearing AP WPA IE"); | |
6fc6879b JM |
3033 | sm->ap_wpa_ie = NULL; |
3034 | sm->ap_wpa_ie_len = 0; | |
3035 | } else { | |
3036 | wpa_hexdump(MSG_DEBUG, "WPA: set AP WPA IE", ie, len); | |
a1f11e34 | 3037 | sm->ap_wpa_ie = os_memdup(ie, len); |
6fc6879b JM |
3038 | if (sm->ap_wpa_ie == NULL) |
3039 | return -1; | |
3040 | ||
6fc6879b JM |
3041 | sm->ap_wpa_ie_len = len; |
3042 | } | |
3043 | ||
3044 | return 0; | |
3045 | } | |
3046 | ||
3047 | ||
3048 | /** | |
3049 | * wpa_sm_set_ap_rsn_ie - Set AP RSN IE from Beacon/ProbeResp | |
3050 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
3051 | * @ie: Pointer to IE data (starting from id) | |
3052 | * @len: IE length | |
3053 | * Returns: 0 on success, -1 on failure | |
3054 | * | |
3055 | * Inform WPA state machine about the RSN IE used in Beacon / Probe Response | |
3056 | * frame. | |
3057 | */ | |
3058 | int wpa_sm_set_ap_rsn_ie(struct wpa_sm *sm, const u8 *ie, size_t len) | |
3059 | { | |
3060 | if (sm == NULL) | |
3061 | return -1; | |
3062 | ||
3063 | os_free(sm->ap_rsn_ie); | |
3064 | if (ie == NULL || len == 0) { | |
f049052b BG |
3065 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
3066 | "WPA: clearing AP RSN IE"); | |
6fc6879b JM |
3067 | sm->ap_rsn_ie = NULL; |
3068 | sm->ap_rsn_ie_len = 0; | |
3069 | } else { | |
3070 | wpa_hexdump(MSG_DEBUG, "WPA: set AP RSN IE", ie, len); | |
a1f11e34 | 3071 | sm->ap_rsn_ie = os_memdup(ie, len); |
6fc6879b JM |
3072 | if (sm->ap_rsn_ie == NULL) |
3073 | return -1; | |
3074 | ||
6fc6879b JM |
3075 | sm->ap_rsn_ie_len = len; |
3076 | } | |
3077 | ||
3078 | return 0; | |
3079 | } | |
3080 | ||
3081 | ||
3082 | /** | |
3083 | * wpa_sm_parse_own_wpa_ie - Parse own WPA/RSN IE | |
3084 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
3085 | * @data: Pointer to data area for parsing results | |
3086 | * Returns: 0 on success, -1 if IE is not known, or -2 on parsing failure | |
3087 | * | |
3088 | * Parse the contents of the own WPA or RSN IE from (Re)AssocReq and write the | |
3089 | * parsed data into data. | |
3090 | */ | |
3091 | int wpa_sm_parse_own_wpa_ie(struct wpa_sm *sm, struct wpa_ie_data *data) | |
3092 | { | |
2a522e71 JM |
3093 | if (sm == NULL) |
3094 | return -1; | |
3095 | ||
3096 | if (sm->assoc_wpa_ie == NULL) { | |
f049052b BG |
3097 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
3098 | "WPA: No WPA/RSN IE available from association info"); | |
6fc6879b JM |
3099 | return -1; |
3100 | } | |
3101 | if (wpa_parse_wpa_ie(sm->assoc_wpa_ie, sm->assoc_wpa_ie_len, data)) | |
3102 | return -2; | |
3103 | return 0; | |
3104 | } | |
540264a7 JM |
3105 | |
3106 | ||
3107 | int wpa_sm_pmksa_cache_list(struct wpa_sm *sm, char *buf, size_t len) | |
3108 | { | |
540264a7 | 3109 | return pmksa_cache_list(sm->pmksa, buf, len); |
540264a7 | 3110 | } |
32d5295f JM |
3111 | |
3112 | ||
3459381d JM |
3113 | struct rsn_pmksa_cache_entry * wpa_sm_pmksa_cache_head(struct wpa_sm *sm) |
3114 | { | |
3115 | return pmksa_cache_head(sm->pmksa); | |
3116 | } | |
3117 | ||
3118 | ||
3119 | struct rsn_pmksa_cache_entry * | |
3120 | wpa_sm_pmksa_cache_add_entry(struct wpa_sm *sm, | |
3121 | struct rsn_pmksa_cache_entry * entry) | |
3122 | { | |
3123 | return pmksa_cache_add_entry(sm->pmksa, entry); | |
3124 | } | |
3125 | ||
3126 | ||
f705f41b VK |
3127 | void wpa_sm_pmksa_cache_add(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len, |
3128 | const u8 *pmkid, const u8 *bssid, | |
3129 | const u8 *fils_cache_id) | |
3130 | { | |
3131 | sm->cur_pmksa = pmksa_cache_add(sm->pmksa, pmk, pmk_len, pmkid, NULL, 0, | |
3132 | bssid, sm->own_addr, sm->network_ctx, | |
3133 | sm->key_mgmt, fils_cache_id); | |
3134 | } | |
3135 | ||
3136 | ||
567da5bb JM |
3137 | int wpa_sm_pmksa_exists(struct wpa_sm *sm, const u8 *bssid, |
3138 | const void *network_ctx) | |
3139 | { | |
852b2f27 | 3140 | return pmksa_cache_get(sm->pmksa, bssid, NULL, network_ctx, 0) != NULL; |
567da5bb JM |
3141 | } |
3142 | ||
3143 | ||
32d5295f JM |
3144 | void wpa_sm_drop_sa(struct wpa_sm *sm) |
3145 | { | |
f049052b | 3146 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PMK and PTK"); |
32d5295f JM |
3147 | sm->ptk_set = 0; |
3148 | sm->tptk_set = 0; | |
1bd13110 | 3149 | sm->pmk_len = 0; |
32d5295f JM |
3150 | os_memset(sm->pmk, 0, sizeof(sm->pmk)); |
3151 | os_memset(&sm->ptk, 0, sizeof(sm->ptk)); | |
3152 | os_memset(&sm->tptk, 0, sizeof(sm->tptk)); | |
cb5132bb | 3153 | os_memset(&sm->gtk, 0, sizeof(sm->gtk)); |
87e2db16 | 3154 | os_memset(&sm->gtk_wnm_sleep, 0, sizeof(sm->gtk_wnm_sleep)); |
cb5132bb MV |
3155 | #ifdef CONFIG_IEEE80211W |
3156 | os_memset(&sm->igtk, 0, sizeof(sm->igtk)); | |
87e2db16 | 3157 | os_memset(&sm->igtk_wnm_sleep, 0, sizeof(sm->igtk_wnm_sleep)); |
cb5132bb | 3158 | #endif /* CONFIG_IEEE80211W */ |
71932544 JM |
3159 | #ifdef CONFIG_IEEE80211R |
3160 | os_memset(sm->xxkey, 0, sizeof(sm->xxkey)); | |
a3e18dbb | 3161 | sm->xxkey_len = 0; |
71932544 | 3162 | os_memset(sm->pmk_r0, 0, sizeof(sm->pmk_r0)); |
a3e18dbb | 3163 | sm->pmk_r0_len = 0; |
71932544 | 3164 | os_memset(sm->pmk_r1, 0, sizeof(sm->pmk_r1)); |
a3e18dbb | 3165 | sm->pmk_r1_len = 0; |
71932544 | 3166 | #endif /* CONFIG_IEEE80211R */ |
32d5295f | 3167 | } |
0d7b4409 JM |
3168 | |
3169 | ||
3170 | int wpa_sm_has_ptk(struct wpa_sm *sm) | |
3171 | { | |
3172 | if (sm == NULL) | |
3173 | return 0; | |
3174 | return sm->ptk_set; | |
3175 | } | |
b14a210c JB |
3176 | |
3177 | ||
3178 | void wpa_sm_update_replay_ctr(struct wpa_sm *sm, const u8 *replay_ctr) | |
3179 | { | |
3180 | os_memcpy(sm->rx_replay_counter, replay_ctr, WPA_REPLAY_COUNTER_LEN); | |
3181 | } | |
d8a790b9 JM |
3182 | |
3183 | ||
3184 | void wpa_sm_pmksa_cache_flush(struct wpa_sm *sm, void *network_ctx) | |
3185 | { | |
4033935d | 3186 | pmksa_cache_flush(sm->pmksa, network_ctx, NULL, 0); |
d8a790b9 | 3187 | } |
75cad1a0 XC |
3188 | |
3189 | ||
ad3872a3 | 3190 | #ifdef CONFIG_WNM |
75cad1a0 XC |
3191 | int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 subelem_id, u8 *buf) |
3192 | { | |
75cad1a0 XC |
3193 | u16 keyinfo; |
3194 | u8 keylen; /* plaintext key len */ | |
75cad1a0 XC |
3195 | u8 *key_rsc; |
3196 | ||
75cad1a0 | 3197 | if (subelem_id == WNM_SLEEP_SUBELEM_GTK) { |
d2c33b91 JM |
3198 | struct wpa_gtk_data gd; |
3199 | ||
3200 | os_memset(&gd, 0, sizeof(gd)); | |
3201 | keylen = wpa_cipher_key_len(sm->group_cipher); | |
3202 | gd.key_rsc_len = wpa_cipher_rsc_len(sm->group_cipher); | |
3203 | gd.alg = wpa_cipher_to_alg(sm->group_cipher); | |
3204 | if (gd.alg == WPA_ALG_NONE) { | |
3205 | wpa_printf(MSG_DEBUG, "Unsupported group cipher suite"); | |
3206 | return -1; | |
3207 | } | |
3208 | ||
75cad1a0 | 3209 | key_rsc = buf + 5; |
68db9ab0 | 3210 | keyinfo = WPA_GET_LE16(buf + 2); |
75cad1a0 XC |
3211 | gd.gtk_len = keylen; |
3212 | if (gd.gtk_len != buf[4]) { | |
3213 | wpa_printf(MSG_DEBUG, "GTK len mismatch len %d vs %d", | |
3214 | gd.gtk_len, buf[4]); | |
3215 | return -1; | |
3216 | } | |
3217 | gd.keyidx = keyinfo & 0x03; /* B0 - B1 */ | |
3218 | gd.tx = wpa_supplicant_gtk_tx_bit_workaround( | |
3219 | sm, !!(keyinfo & WPA_KEY_INFO_TXRX)); | |
3220 | ||
68db9ab0 | 3221 | os_memcpy(gd.gtk, buf + 13, gd.gtk_len); |
75cad1a0 XC |
3222 | |
3223 | wpa_hexdump_key(MSG_DEBUG, "Install GTK (WNM SLEEP)", | |
3224 | gd.gtk, gd.gtk_len); | |
87e2db16 | 3225 | if (wpa_supplicant_install_gtk(sm, &gd, key_rsc, 1)) { |
d2c33b91 | 3226 | os_memset(&gd, 0, sizeof(gd)); |
75cad1a0 XC |
3227 | wpa_printf(MSG_DEBUG, "Failed to install the GTK in " |
3228 | "WNM mode"); | |
3229 | return -1; | |
3230 | } | |
d2c33b91 | 3231 | os_memset(&gd, 0, sizeof(gd)); |
75cad1a0 XC |
3232 | #ifdef CONFIG_IEEE80211W |
3233 | } else if (subelem_id == WNM_SLEEP_SUBELEM_IGTK) { | |
cb5132bb MV |
3234 | const struct wpa_igtk_kde *igtk; |
3235 | ||
3236 | igtk = (const struct wpa_igtk_kde *) (buf + 2); | |
87e2db16 | 3237 | if (wpa_supplicant_install_igtk(sm, igtk, 1) < 0) |
75cad1a0 | 3238 | return -1; |
75cad1a0 XC |
3239 | #endif /* CONFIG_IEEE80211W */ |
3240 | } else { | |
3241 | wpa_printf(MSG_DEBUG, "Unknown element id"); | |
3242 | return -1; | |
3243 | } | |
3244 | ||
3245 | return 0; | |
3246 | } | |
ad3872a3 | 3247 | #endif /* CONFIG_WNM */ |
db76aa64 JM |
3248 | |
3249 | ||
25ef8529 JM |
3250 | #ifdef CONFIG_P2P |
3251 | ||
3252 | int wpa_sm_get_p2p_ip_addr(struct wpa_sm *sm, u8 *buf) | |
3253 | { | |
3254 | if (sm == NULL || WPA_GET_BE32(sm->p2p_ip_addr) == 0) | |
3255 | return -1; | |
3256 | os_memcpy(buf, sm->p2p_ip_addr, 3 * 4); | |
3257 | return 0; | |
3258 | } | |
3259 | ||
3260 | #endif /* CONFIG_P2P */ | |
b41f2684 CL |
3261 | |
3262 | ||
3263 | void wpa_sm_set_rx_replay_ctr(struct wpa_sm *sm, const u8 *rx_replay_counter) | |
3264 | { | |
3265 | if (rx_replay_counter == NULL) | |
3266 | return; | |
3267 | ||
3268 | os_memcpy(sm->rx_replay_counter, rx_replay_counter, | |
3269 | WPA_REPLAY_COUNTER_LEN); | |
3270 | sm->rx_replay_counter_set = 1; | |
3271 | wpa_printf(MSG_DEBUG, "Updated key replay counter"); | |
3272 | } | |
3273 | ||
3274 | ||
98cd3d1c JM |
3275 | void wpa_sm_set_ptk_kck_kek(struct wpa_sm *sm, |
3276 | const u8 *ptk_kck, size_t ptk_kck_len, | |
3277 | const u8 *ptk_kek, size_t ptk_kek_len) | |
b41f2684 | 3278 | { |
98cd3d1c JM |
3279 | if (ptk_kck && ptk_kck_len <= WPA_KCK_MAX_LEN) { |
3280 | os_memcpy(sm->ptk.kck, ptk_kck, ptk_kck_len); | |
3281 | sm->ptk.kck_len = ptk_kck_len; | |
b41f2684 CL |
3282 | wpa_printf(MSG_DEBUG, "Updated PTK KCK"); |
3283 | } | |
98cd3d1c JM |
3284 | if (ptk_kek && ptk_kek_len <= WPA_KEK_MAX_LEN) { |
3285 | os_memcpy(sm->ptk.kek, ptk_kek, ptk_kek_len); | |
3286 | sm->ptk.kek_len = ptk_kek_len; | |
b41f2684 CL |
3287 | wpa_printf(MSG_DEBUG, "Updated PTK KEK"); |
3288 | } | |
3289 | sm->ptk_set = 1; | |
3290 | } | |
651c6a84 JM |
3291 | |
3292 | ||
3293 | #ifdef CONFIG_TESTING_OPTIONS | |
bb06748f | 3294 | |
651c6a84 JM |
3295 | void wpa_sm_set_test_assoc_ie(struct wpa_sm *sm, struct wpabuf *buf) |
3296 | { | |
3297 | wpabuf_free(sm->test_assoc_ie); | |
3298 | sm->test_assoc_ie = buf; | |
3299 | } | |
bb06748f JM |
3300 | |
3301 | ||
3302 | const u8 * wpa_sm_get_anonce(struct wpa_sm *sm) | |
3303 | { | |
3304 | return sm->anonce; | |
3305 | } | |
3306 | ||
651c6a84 | 3307 | #endif /* CONFIG_TESTING_OPTIONS */ |
f00b9b88 JM |
3308 | |
3309 | ||
3dc3afe2 AM |
3310 | unsigned int wpa_sm_get_key_mgmt(struct wpa_sm *sm) |
3311 | { | |
3312 | return sm->key_mgmt; | |
3313 | } | |
3314 | ||
3315 | ||
f00b9b88 JM |
3316 | #ifdef CONFIG_FILS |
3317 | ||
af3e362f | 3318 | struct wpabuf * fils_build_auth(struct wpa_sm *sm, int dh_group, const u8 *md) |
f00b9b88 JM |
3319 | { |
3320 | struct wpabuf *buf = NULL; | |
3321 | struct wpabuf *erp_msg; | |
76e20f4f | 3322 | struct wpabuf *pub = NULL; |
f00b9b88 JM |
3323 | |
3324 | erp_msg = eapol_sm_build_erp_reauth_start(sm->eapol); | |
3325 | if (!erp_msg && !sm->cur_pmksa) { | |
3326 | wpa_printf(MSG_DEBUG, | |
3327 | "FILS: Neither ERP EAP-Initiate/Re-auth nor PMKSA cache entry is available - skip FILS"); | |
3328 | goto fail; | |
3329 | } | |
3330 | ||
3331 | wpa_printf(MSG_DEBUG, "FILS: Try to use FILS (erp=%d pmksa_cache=%d)", | |
3332 | erp_msg != NULL, sm->cur_pmksa != NULL); | |
3333 | ||
706df429 JM |
3334 | sm->fils_completed = 0; |
3335 | ||
f00b9b88 JM |
3336 | if (!sm->assoc_wpa_ie) { |
3337 | wpa_printf(MSG_INFO, "FILS: No own RSN IE set for FILS"); | |
3338 | goto fail; | |
3339 | } | |
3340 | ||
3341 | if (random_get_bytes(sm->fils_nonce, FILS_NONCE_LEN) < 0 || | |
3342 | random_get_bytes(sm->fils_session, FILS_SESSION_LEN) < 0) | |
3343 | goto fail; | |
3344 | ||
3345 | wpa_hexdump(MSG_DEBUG, "FILS: Generated FILS Nonce", | |
3346 | sm->fils_nonce, FILS_NONCE_LEN); | |
3347 | wpa_hexdump(MSG_DEBUG, "FILS: Generated FILS Session", | |
3348 | sm->fils_session, FILS_SESSION_LEN); | |
3349 | ||
76e20f4f JM |
3350 | #ifdef CONFIG_FILS_SK_PFS |
3351 | sm->fils_dh_group = dh_group; | |
3352 | if (dh_group) { | |
3353 | crypto_ecdh_deinit(sm->fils_ecdh); | |
3354 | sm->fils_ecdh = crypto_ecdh_init(dh_group); | |
3355 | if (!sm->fils_ecdh) { | |
3356 | wpa_printf(MSG_INFO, | |
3357 | "FILS: Could not initialize ECDH with group %d", | |
3358 | dh_group); | |
3359 | goto fail; | |
3360 | } | |
3361 | pub = crypto_ecdh_get_pubkey(sm->fils_ecdh, 1); | |
3362 | if (!pub) | |
3363 | goto fail; | |
3364 | wpa_hexdump_buf(MSG_DEBUG, "FILS: Element (DH public key)", | |
3365 | pub); | |
3366 | sm->fils_dh_elem_len = wpabuf_len(pub); | |
3367 | } | |
3368 | #endif /* CONFIG_FILS_SK_PFS */ | |
3369 | ||
3370 | buf = wpabuf_alloc(1000 + sm->assoc_wpa_ie_len + | |
3371 | (pub ? wpabuf_len(pub) : 0)); | |
f00b9b88 JM |
3372 | if (!buf) |
3373 | goto fail; | |
3374 | ||
3375 | /* Fields following the Authentication algorithm number field */ | |
3376 | ||
3377 | /* Authentication Transaction seq# */ | |
3378 | wpabuf_put_le16(buf, 1); | |
3379 | ||
3380 | /* Status Code */ | |
3381 | wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS); | |
3382 | ||
76e20f4f JM |
3383 | /* TODO: FILS PK */ |
3384 | #ifdef CONFIG_FILS_SK_PFS | |
3385 | if (dh_group) { | |
3386 | /* Finite Cyclic Group */ | |
3387 | wpabuf_put_le16(buf, dh_group); | |
3388 | /* Element */ | |
3389 | wpabuf_put_buf(buf, pub); | |
3390 | } | |
3391 | #endif /* CONFIG_FILS_SK_PFS */ | |
f00b9b88 JM |
3392 | |
3393 | /* RSNE */ | |
3394 | wpa_hexdump(MSG_DEBUG, "FILS: RSNE in FILS Authentication frame", | |
3395 | sm->assoc_wpa_ie, sm->assoc_wpa_ie_len); | |
3396 | wpabuf_put_data(buf, sm->assoc_wpa_ie, sm->assoc_wpa_ie_len); | |
3397 | ||
af3e362f JM |
3398 | if (md) { |
3399 | /* MDE when using FILS for FT initial association */ | |
3400 | struct rsn_mdie *mdie; | |
3401 | ||
3402 | wpabuf_put_u8(buf, WLAN_EID_MOBILITY_DOMAIN); | |
3403 | wpabuf_put_u8(buf, sizeof(*mdie)); | |
3404 | mdie = wpabuf_put(buf, sizeof(*mdie)); | |
3405 | os_memcpy(mdie->mobility_domain, md, MOBILITY_DOMAIN_ID_LEN); | |
3406 | mdie->ft_capab = 0; | |
3407 | } | |
f00b9b88 JM |
3408 | |
3409 | /* FILS Nonce */ | |
3410 | wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */ | |
3411 | wpabuf_put_u8(buf, 1 + FILS_NONCE_LEN); /* Length */ | |
3412 | /* Element ID Extension */ | |
3413 | wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_NONCE); | |
3414 | wpabuf_put_data(buf, sm->fils_nonce, FILS_NONCE_LEN); | |
3415 | ||
3416 | /* FILS Session */ | |
3417 | wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */ | |
3418 | wpabuf_put_u8(buf, 1 + FILS_SESSION_LEN); /* Length */ | |
3419 | /* Element ID Extension */ | |
3420 | wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_SESSION); | |
3421 | wpabuf_put_data(buf, sm->fils_session, FILS_SESSION_LEN); | |
3422 | ||
3423 | /* FILS Wrapped Data */ | |
fcd3d6ce | 3424 | sm->fils_erp_pmkid_set = 0; |
f00b9b88 JM |
3425 | if (erp_msg) { |
3426 | wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */ | |
3427 | wpabuf_put_u8(buf, 1 + wpabuf_len(erp_msg)); /* Length */ | |
3428 | /* Element ID Extension */ | |
3429 | wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_WRAPPED_DATA); | |
3430 | wpabuf_put_buf(buf, erp_msg); | |
fcd3d6ce JM |
3431 | /* Calculate pending PMKID here so that we do not need to |
3432 | * maintain a copy of the EAP-Initiate/Reauth message. */ | |
3433 | if (fils_pmkid_erp(sm->key_mgmt, wpabuf_head(erp_msg), | |
3434 | wpabuf_len(erp_msg), | |
3435 | sm->fils_erp_pmkid) == 0) | |
3436 | sm->fils_erp_pmkid_set = 1; | |
f00b9b88 JM |
3437 | } |
3438 | ||
3439 | wpa_hexdump_buf(MSG_DEBUG, "RSN: FILS fields for Authentication frame", | |
3440 | buf); | |
3441 | ||
3442 | fail: | |
3443 | wpabuf_free(erp_msg); | |
76e20f4f | 3444 | wpabuf_free(pub); |
f00b9b88 JM |
3445 | return buf; |
3446 | } | |
3447 | ||
a6609937 | 3448 | |
ba9774bd JM |
3449 | int fils_process_auth(struct wpa_sm *sm, const u8 *bssid, const u8 *data, |
3450 | size_t len) | |
a6609937 JM |
3451 | { |
3452 | const u8 *pos, *end; | |
3453 | struct ieee802_11_elems elems; | |
3454 | struct wpa_ie_data rsn; | |
3455 | int pmkid_match = 0; | |
3456 | u8 ick[FILS_ICK_MAX_LEN]; | |
3457 | size_t ick_len; | |
3458 | int res; | |
76e20f4f | 3459 | struct wpabuf *dh_ss = NULL; |
e6b62313 JM |
3460 | const u8 *g_sta = NULL; |
3461 | size_t g_sta_len = 0; | |
3462 | const u8 *g_ap = NULL; | |
3463 | size_t g_ap_len = 0; | |
3464 | struct wpabuf *pub = NULL; | |
a6609937 | 3465 | |
ba9774bd JM |
3466 | os_memcpy(sm->bssid, bssid, ETH_ALEN); |
3467 | ||
a6609937 JM |
3468 | wpa_hexdump(MSG_DEBUG, "FILS: Authentication frame fields", |
3469 | data, len); | |
3470 | pos = data; | |
3471 | end = data + len; | |
3472 | ||
76e20f4f JM |
3473 | /* TODO: FILS PK */ |
3474 | #ifdef CONFIG_FILS_SK_PFS | |
3475 | if (sm->fils_dh_group) { | |
3476 | u16 group; | |
3477 | ||
3478 | /* Using FILS PFS */ | |
3479 | ||
3480 | /* Finite Cyclic Group */ | |
3481 | if (end - pos < 2) { | |
3482 | wpa_printf(MSG_DEBUG, | |
3483 | "FILS: No room for Finite Cyclic Group"); | |
3484 | goto fail; | |
3485 | } | |
3486 | group = WPA_GET_LE16(pos); | |
3487 | pos += 2; | |
3488 | if (group != sm->fils_dh_group) { | |
3489 | wpa_printf(MSG_DEBUG, | |
3490 | "FILS: Unexpected change in Finite Cyclic Group: %u (expected %u)", | |
3491 | group, sm->fils_dh_group); | |
3492 | goto fail; | |
3493 | } | |
3494 | ||
3495 | /* Element */ | |
3496 | if ((size_t) (end - pos) < sm->fils_dh_elem_len) { | |
3497 | wpa_printf(MSG_DEBUG, "FILS: No room for Element"); | |
3498 | goto fail; | |
3499 | } | |
3500 | ||
3501 | if (!sm->fils_ecdh) { | |
3502 | wpa_printf(MSG_DEBUG, "FILS: No ECDH state available"); | |
3503 | goto fail; | |
3504 | } | |
3505 | dh_ss = crypto_ecdh_set_peerkey(sm->fils_ecdh, 1, pos, | |
3506 | sm->fils_dh_elem_len); | |
3507 | if (!dh_ss) { | |
3508 | wpa_printf(MSG_DEBUG, "FILS: ECDH operation failed"); | |
3509 | goto fail; | |
3510 | } | |
3511 | wpa_hexdump_buf_key(MSG_DEBUG, "FILS: DH_SS", dh_ss); | |
e6b62313 JM |
3512 | g_ap = pos; |
3513 | g_ap_len = sm->fils_dh_elem_len; | |
76e20f4f JM |
3514 | pos += sm->fils_dh_elem_len; |
3515 | } | |
3516 | #endif /* CONFIG_FILS_SK_PFS */ | |
a6609937 JM |
3517 | |
3518 | wpa_hexdump(MSG_DEBUG, "FILS: Remaining IEs", pos, end - pos); | |
3519 | if (ieee802_11_parse_elems(pos, end - pos, &elems, 1) == ParseFailed) { | |
3520 | wpa_printf(MSG_DEBUG, "FILS: Could not parse elements"); | |
76e20f4f | 3521 | goto fail; |
a6609937 JM |
3522 | } |
3523 | ||
3524 | /* RSNE */ | |
3525 | wpa_hexdump(MSG_DEBUG, "FILS: RSN element", elems.rsn_ie, | |
3526 | elems.rsn_ie_len); | |
3527 | if (!elems.rsn_ie || | |
3528 | wpa_parse_wpa_ie_rsn(elems.rsn_ie - 2, elems.rsn_ie_len + 2, | |
3529 | &rsn) < 0) { | |
3530 | wpa_printf(MSG_DEBUG, "FILS: No RSN element"); | |
76e20f4f | 3531 | goto fail; |
a6609937 JM |
3532 | } |
3533 | ||
3534 | if (!elems.fils_nonce) { | |
3535 | wpa_printf(MSG_DEBUG, "FILS: No FILS Nonce field"); | |
76e20f4f | 3536 | goto fail; |
a6609937 JM |
3537 | } |
3538 | os_memcpy(sm->fils_anonce, elems.fils_nonce, FILS_NONCE_LEN); | |
3539 | wpa_hexdump(MSG_DEBUG, "FILS: ANonce", sm->fils_anonce, FILS_NONCE_LEN); | |
3540 | ||
d555c39c | 3541 | #ifdef CONFIG_IEEE80211R |
7d440a3b JM |
3542 | if (wpa_key_mgmt_ft(sm->key_mgmt)) { |
3543 | struct wpa_ft_ies parse; | |
3544 | ||
3545 | if (!elems.mdie || !elems.ftie) { | |
3546 | wpa_printf(MSG_DEBUG, "FILS+FT: No MDE or FTE"); | |
3547 | goto fail; | |
3548 | } | |
3549 | ||
9a33737a JM |
3550 | if (wpa_ft_parse_ies(pos, end - pos, &parse, |
3551 | wpa_key_mgmt_sha384(sm->key_mgmt)) < 0) { | |
7d440a3b JM |
3552 | wpa_printf(MSG_DEBUG, "FILS+FT: Failed to parse IEs"); |
3553 | goto fail; | |
3554 | } | |
3555 | ||
3556 | if (!parse.r0kh_id) { | |
3557 | wpa_printf(MSG_DEBUG, | |
3558 | "FILS+FT: No R0KH-ID subelem in FTE"); | |
3559 | goto fail; | |
3560 | } | |
3561 | os_memcpy(sm->r0kh_id, parse.r0kh_id, parse.r0kh_id_len); | |
3562 | sm->r0kh_id_len = parse.r0kh_id_len; | |
3563 | wpa_hexdump_ascii(MSG_DEBUG, "FILS+FT: R0KH-ID", | |
3564 | sm->r0kh_id, sm->r0kh_id_len); | |
3565 | ||
3566 | if (!parse.r1kh_id) { | |
3567 | wpa_printf(MSG_DEBUG, | |
3568 | "FILS+FT: No R1KH-ID subelem in FTE"); | |
3569 | goto fail; | |
3570 | } | |
3571 | os_memcpy(sm->r1kh_id, parse.r1kh_id, FT_R1KH_ID_LEN); | |
3572 | wpa_hexdump(MSG_DEBUG, "FILS+FT: R1KH-ID", | |
3573 | sm->r1kh_id, FT_R1KH_ID_LEN); | |
3574 | ||
3575 | /* TODO: Check MDE and FTE payload */ | |
3576 | ||
3577 | wpabuf_free(sm->fils_ft_ies); | |
3578 | sm->fils_ft_ies = wpabuf_alloc(2 + elems.mdie_len + | |
3579 | 2 + elems.ftie_len); | |
3580 | if (!sm->fils_ft_ies) | |
3581 | goto fail; | |
3582 | wpabuf_put_data(sm->fils_ft_ies, elems.mdie - 2, | |
3583 | 2 + elems.mdie_len); | |
3584 | wpabuf_put_data(sm->fils_ft_ies, elems.ftie - 2, | |
3585 | 2 + elems.ftie_len); | |
3586 | } else { | |
3587 | wpabuf_free(sm->fils_ft_ies); | |
3588 | sm->fils_ft_ies = NULL; | |
3589 | } | |
d555c39c | 3590 | #endif /* CONFIG_IEEE80211R */ |
a6609937 JM |
3591 | |
3592 | /* PMKID List */ | |
3593 | if (rsn.pmkid && rsn.num_pmkid > 0) { | |
3594 | wpa_hexdump(MSG_DEBUG, "FILS: PMKID List", | |
3595 | rsn.pmkid, rsn.num_pmkid * PMKID_LEN); | |
3596 | ||
3597 | if (rsn.num_pmkid != 1) { | |
3598 | wpa_printf(MSG_DEBUG, "FILS: Invalid PMKID selection"); | |
76e20f4f | 3599 | goto fail; |
a6609937 JM |
3600 | } |
3601 | wpa_hexdump(MSG_DEBUG, "FILS: PMKID", rsn.pmkid, PMKID_LEN); | |
3602 | if (os_memcmp(sm->cur_pmksa->pmkid, rsn.pmkid, PMKID_LEN) != 0) | |
3603 | { | |
3604 | wpa_printf(MSG_DEBUG, "FILS: PMKID mismatch"); | |
3605 | wpa_hexdump(MSG_DEBUG, "FILS: Expected PMKID", | |
3606 | sm->cur_pmksa->pmkid, PMKID_LEN); | |
76e20f4f | 3607 | goto fail; |
a6609937 JM |
3608 | } |
3609 | wpa_printf(MSG_DEBUG, | |
3610 | "FILS: Matching PMKID - continue using PMKSA caching"); | |
3611 | pmkid_match = 1; | |
3612 | } | |
3613 | if (!pmkid_match && sm->cur_pmksa) { | |
3614 | wpa_printf(MSG_DEBUG, | |
3615 | "FILS: No PMKID match - cannot use cached PMKSA entry"); | |
3616 | sm->cur_pmksa = NULL; | |
3617 | } | |
3618 | ||
3619 | /* FILS Session */ | |
3620 | if (!elems.fils_session) { | |
3621 | wpa_printf(MSG_DEBUG, "FILS: No FILS Session element"); | |
76e20f4f | 3622 | goto fail; |
a6609937 JM |
3623 | } |
3624 | wpa_hexdump(MSG_DEBUG, "FILS: FILS Session", elems.fils_session, | |
3625 | FILS_SESSION_LEN); | |
3626 | if (os_memcmp(sm->fils_session, elems.fils_session, FILS_SESSION_LEN) | |
3627 | != 0) { | |
3628 | wpa_printf(MSG_DEBUG, "FILS: Session mismatch"); | |
3629 | wpa_hexdump(MSG_DEBUG, "FILS: Expected FILS Session", | |
3630 | sm->fils_session, FILS_SESSION_LEN); | |
76e20f4f | 3631 | goto fail; |
a6609937 JM |
3632 | } |
3633 | ||
3634 | /* FILS Wrapped Data */ | |
3635 | if (!sm->cur_pmksa && elems.fils_wrapped_data) { | |
fcd3d6ce JM |
3636 | u8 rmsk[ERP_MAX_KEY_LEN]; |
3637 | size_t rmsk_len; | |
3638 | ||
a6609937 JM |
3639 | wpa_hexdump(MSG_DEBUG, "FILS: Wrapped Data", |
3640 | elems.fils_wrapped_data, | |
3641 | elems.fils_wrapped_data_len); | |
3642 | eapol_sm_process_erp_finish(sm->eapol, elems.fils_wrapped_data, | |
3643 | elems.fils_wrapped_data_len); | |
3644 | if (eapol_sm_failed(sm->eapol)) | |
76e20f4f | 3645 | goto fail; |
a6609937 | 3646 | |
fcd3d6ce JM |
3647 | rmsk_len = ERP_MAX_KEY_LEN; |
3648 | res = eapol_sm_get_key(sm->eapol, rmsk, rmsk_len); | |
3649 | if (res == PMK_LEN) { | |
3650 | rmsk_len = PMK_LEN; | |
3651 | res = eapol_sm_get_key(sm->eapol, rmsk, rmsk_len); | |
3652 | } | |
a6609937 | 3653 | if (res) |
76e20f4f | 3654 | goto fail; |
a6609937 | 3655 | |
fcd3d6ce | 3656 | res = fils_rmsk_to_pmk(sm->key_mgmt, rmsk, rmsk_len, |
76e20f4f JM |
3657 | sm->fils_nonce, sm->fils_anonce, |
3658 | dh_ss ? wpabuf_head(dh_ss) : NULL, | |
3659 | dh_ss ? wpabuf_len(dh_ss) : 0, | |
fcd3d6ce JM |
3660 | sm->pmk, &sm->pmk_len); |
3661 | os_memset(rmsk, 0, sizeof(rmsk)); | |
4cada9dc JM |
3662 | |
3663 | /* Don't use DHss in PTK derivation if PMKSA caching is not | |
3664 | * used. */ | |
76e20f4f JM |
3665 | wpabuf_clear_free(dh_ss); |
3666 | dh_ss = NULL; | |
4cada9dc | 3667 | |
275cc942 | 3668 | if (res) |
76e20f4f | 3669 | goto fail; |
fcd3d6ce JM |
3670 | |
3671 | if (!sm->fils_erp_pmkid_set) { | |
3672 | wpa_printf(MSG_DEBUG, "FILS: PMKID not available"); | |
76e20f4f | 3673 | goto fail; |
fcd3d6ce JM |
3674 | } |
3675 | wpa_hexdump(MSG_DEBUG, "FILS: PMKID", sm->fils_erp_pmkid, | |
3676 | PMKID_LEN); | |
a6609937 | 3677 | wpa_printf(MSG_DEBUG, "FILS: ERP processing succeeded - add PMKSA cache entry for the result"); |
fcd3d6ce JM |
3678 | sm->cur_pmksa = pmksa_cache_add(sm->pmksa, sm->pmk, sm->pmk_len, |
3679 | sm->fils_erp_pmkid, NULL, 0, | |
3680 | sm->bssid, sm->own_addr, | |
869af307 JM |
3681 | sm->network_ctx, sm->key_mgmt, |
3682 | NULL); | |
a6609937 JM |
3683 | } |
3684 | ||
3685 | if (!sm->cur_pmksa) { | |
3686 | wpa_printf(MSG_DEBUG, | |
3687 | "FILS: No remaining options to continue FILS authentication"); | |
76e20f4f | 3688 | goto fail; |
a6609937 JM |
3689 | } |
3690 | ||
3691 | if (fils_pmk_to_ptk(sm->pmk, sm->pmk_len, sm->own_addr, sm->bssid, | |
4cada9dc JM |
3692 | sm->fils_nonce, sm->fils_anonce, |
3693 | dh_ss ? wpabuf_head(dh_ss) : NULL, | |
3694 | dh_ss ? wpabuf_len(dh_ss) : 0, | |
3695 | &sm->ptk, ick, &ick_len, | |
3696 | sm->key_mgmt, sm->pairwise_cipher, | |
7d440a3b | 3697 | sm->fils_ft, &sm->fils_ft_len) < 0) { |
a6609937 | 3698 | wpa_printf(MSG_DEBUG, "FILS: Failed to derive PTK"); |
76e20f4f | 3699 | goto fail; |
a6609937 | 3700 | } |
4cada9dc JM |
3701 | |
3702 | wpabuf_clear_free(dh_ss); | |
3703 | dh_ss = NULL; | |
3704 | ||
a6609937 JM |
3705 | sm->ptk_set = 1; |
3706 | sm->tptk_set = 0; | |
3707 | os_memset(&sm->tptk, 0, sizeof(sm->tptk)); | |
3708 | ||
e6b62313 JM |
3709 | #ifdef CONFIG_FILS_SK_PFS |
3710 | if (sm->fils_dh_group) { | |
3711 | if (!sm->fils_ecdh) { | |
3712 | wpa_printf(MSG_INFO, "FILS: ECDH not initialized"); | |
3713 | goto fail; | |
3714 | } | |
3715 | pub = crypto_ecdh_get_pubkey(sm->fils_ecdh, 1); | |
3716 | if (!pub) | |
3717 | goto fail; | |
3718 | wpa_hexdump_buf(MSG_DEBUG, "FILS: gSTA", pub); | |
3719 | g_sta = wpabuf_head(pub); | |
3720 | g_sta_len = wpabuf_len(pub); | |
3721 | if (!g_ap) { | |
3722 | wpa_printf(MSG_INFO, "FILS: gAP not available"); | |
3723 | goto fail; | |
3724 | } | |
3725 | wpa_hexdump(MSG_DEBUG, "FILS: gAP", g_ap, g_ap_len); | |
3726 | } | |
3727 | #endif /* CONFIG_FILS_SK_PFS */ | |
3728 | ||
a6609937 JM |
3729 | res = fils_key_auth_sk(ick, ick_len, sm->fils_nonce, |
3730 | sm->fils_anonce, sm->own_addr, sm->bssid, | |
e6b62313 | 3731 | g_sta, g_sta_len, g_ap, g_ap_len, |
a6609937 JM |
3732 | sm->key_mgmt, sm->fils_key_auth_sta, |
3733 | sm->fils_key_auth_ap, | |
3734 | &sm->fils_key_auth_len); | |
e6b62313 | 3735 | wpabuf_free(pub); |
a6609937 JM |
3736 | os_memset(ick, 0, sizeof(ick)); |
3737 | return res; | |
76e20f4f | 3738 | fail: |
e6b62313 | 3739 | wpabuf_free(pub); |
76e20f4f JM |
3740 | wpabuf_clear_free(dh_ss); |
3741 | return -1; | |
a6609937 JM |
3742 | } |
3743 | ||
86cd6928 | 3744 | |
7d440a3b JM |
3745 | #ifdef CONFIG_IEEE80211R |
3746 | static int fils_ft_build_assoc_req_rsne(struct wpa_sm *sm, struct wpabuf *buf) | |
3747 | { | |
3748 | struct rsn_ie_hdr *rsnie; | |
3749 | u16 capab; | |
3750 | u8 *pos; | |
994eac7e | 3751 | int use_sha384 = wpa_key_mgmt_sha384(sm->key_mgmt); |
7d440a3b JM |
3752 | |
3753 | /* RSNIE[PMKR0Name/PMKR1Name] */ | |
3754 | rsnie = wpabuf_put(buf, sizeof(*rsnie)); | |
3755 | rsnie->elem_id = WLAN_EID_RSN; | |
3756 | WPA_PUT_LE16(rsnie->version, RSN_VERSION); | |
3757 | ||
3758 | /* Group Suite Selector */ | |
3759 | if (!wpa_cipher_valid_group(sm->group_cipher)) { | |
3760 | wpa_printf(MSG_WARNING, "FT: Invalid group cipher (%d)", | |
3761 | sm->group_cipher); | |
3762 | return -1; | |
3763 | } | |
3764 | pos = wpabuf_put(buf, RSN_SELECTOR_LEN); | |
3765 | RSN_SELECTOR_PUT(pos, wpa_cipher_to_suite(WPA_PROTO_RSN, | |
3766 | sm->group_cipher)); | |
3767 | ||
3768 | /* Pairwise Suite Count */ | |
3769 | wpabuf_put_le16(buf, 1); | |
3770 | ||
3771 | /* Pairwise Suite List */ | |
3772 | if (!wpa_cipher_valid_pairwise(sm->pairwise_cipher)) { | |
3773 | wpa_printf(MSG_WARNING, "FT: Invalid pairwise cipher (%d)", | |
3774 | sm->pairwise_cipher); | |
3775 | return -1; | |
3776 | } | |
3777 | pos = wpabuf_put(buf, RSN_SELECTOR_LEN); | |
3778 | RSN_SELECTOR_PUT(pos, wpa_cipher_to_suite(WPA_PROTO_RSN, | |
3779 | sm->pairwise_cipher)); | |
3780 | ||
3781 | /* Authenticated Key Management Suite Count */ | |
3782 | wpabuf_put_le16(buf, 1); | |
3783 | ||
3784 | /* Authenticated Key Management Suite List */ | |
3785 | pos = wpabuf_put(buf, RSN_SELECTOR_LEN); | |
3786 | if (sm->key_mgmt == WPA_KEY_MGMT_FT_FILS_SHA256) | |
3787 | RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_FILS_SHA256); | |
3788 | else if (sm->key_mgmt == WPA_KEY_MGMT_FT_FILS_SHA384) | |
3789 | RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_FILS_SHA384); | |
3790 | else { | |
3791 | wpa_printf(MSG_WARNING, | |
3792 | "FILS+FT: Invalid key management type (%d)", | |
3793 | sm->key_mgmt); | |
3794 | return -1; | |
3795 | } | |
3796 | ||
3797 | /* RSN Capabilities */ | |
3798 | capab = 0; | |
3799 | #ifdef CONFIG_IEEE80211W | |
3800 | if (sm->mgmt_group_cipher == WPA_CIPHER_AES_128_CMAC) | |
3801 | capab |= WPA_CAPABILITY_MFPC; | |
3802 | #endif /* CONFIG_IEEE80211W */ | |
3803 | wpabuf_put_le16(buf, capab); | |
3804 | ||
3805 | /* PMKID Count */ | |
3806 | wpabuf_put_le16(buf, 1); | |
3807 | ||
3808 | /* PMKID List [PMKR1Name] */ | |
3809 | wpa_hexdump_key(MSG_DEBUG, "FILS+FT: XXKey (FILS-FT)", | |
3810 | sm->fils_ft, sm->fils_ft_len); | |
3811 | wpa_hexdump_ascii(MSG_DEBUG, "FILS+FT: SSID", sm->ssid, sm->ssid_len); | |
3812 | wpa_hexdump(MSG_DEBUG, "FILS+FT: MDID", | |
3813 | sm->mobility_domain, MOBILITY_DOMAIN_ID_LEN); | |
3814 | wpa_hexdump_ascii(MSG_DEBUG, "FILS+FT: R0KH-ID", | |
3815 | sm->r0kh_id, sm->r0kh_id_len); | |
3816 | if (wpa_derive_pmk_r0(sm->fils_ft, sm->fils_ft_len, sm->ssid, | |
3817 | sm->ssid_len, sm->mobility_domain, | |
3818 | sm->r0kh_id, sm->r0kh_id_len, sm->own_addr, | |
994eac7e | 3819 | sm->pmk_r0, sm->pmk_r0_name, use_sha384) < 0) { |
7d440a3b JM |
3820 | wpa_printf(MSG_WARNING, "FILS+FT: Could not derive PMK-R0"); |
3821 | return -1; | |
3822 | } | |
994eac7e JM |
3823 | sm->pmk_r0_len = use_sha384 ? SHA384_MAC_LEN : PMK_LEN; |
3824 | wpa_hexdump_key(MSG_DEBUG, "FILS+FT: PMK-R0", | |
3825 | sm->pmk_r0, sm->pmk_r0_len); | |
7d440a3b JM |
3826 | wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR0Name", |
3827 | sm->pmk_r0_name, WPA_PMK_NAME_LEN); | |
3828 | wpa_printf(MSG_DEBUG, "FILS+FT: R1KH-ID: " MACSTR, | |
3829 | MAC2STR(sm->r1kh_id)); | |
3830 | pos = wpabuf_put(buf, WPA_PMK_NAME_LEN); | |
3831 | if (wpa_derive_pmk_r1_name(sm->pmk_r0_name, sm->r1kh_id, sm->own_addr, | |
c3e4f40c | 3832 | pos, use_sha384) < 0) { |
7d440a3b JM |
3833 | wpa_printf(MSG_WARNING, "FILS+FT: Could not derive PMKR1Name"); |
3834 | return -1; | |
3835 | } | |
3836 | wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR1Name", pos, WPA_PMK_NAME_LEN); | |
3837 | ||
3838 | #ifdef CONFIG_IEEE80211W | |
3839 | if (sm->mgmt_group_cipher == WPA_CIPHER_AES_128_CMAC) { | |
3840 | /* Management Group Cipher Suite */ | |
3841 | pos = wpabuf_put(buf, RSN_SELECTOR_LEN); | |
3842 | RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_AES_128_CMAC); | |
3843 | } | |
3844 | #endif /* CONFIG_IEEE80211W */ | |
3845 | ||
3846 | rsnie->len = ((u8 *) wpabuf_put(buf, 0) - (u8 *) rsnie) - 2; | |
3847 | return 0; | |
3848 | } | |
3849 | #endif /* CONFIG_IEEE80211R */ | |
3850 | ||
3851 | ||
86cd6928 JM |
3852 | struct wpabuf * fils_build_assoc_req(struct wpa_sm *sm, const u8 **kek, |
3853 | size_t *kek_len, const u8 **snonce, | |
5732b770 JM |
3854 | const u8 **anonce, |
3855 | const struct wpabuf **hlp, | |
3856 | unsigned int num_hlp) | |
86cd6928 JM |
3857 | { |
3858 | struct wpabuf *buf; | |
5732b770 JM |
3859 | size_t len; |
3860 | unsigned int i; | |
86cd6928 | 3861 | |
5732b770 | 3862 | len = 1000; |
7d440a3b JM |
3863 | #ifdef CONFIG_IEEE80211R |
3864 | if (sm->fils_ft_ies) | |
3865 | len += wpabuf_len(sm->fils_ft_ies); | |
3866 | if (wpa_key_mgmt_ft(sm->key_mgmt)) | |
3867 | len += 256; | |
3868 | #endif /* CONFIG_IEEE80211R */ | |
5732b770 JM |
3869 | for (i = 0; hlp && i < num_hlp; i++) |
3870 | len += 10 + wpabuf_len(hlp[i]); | |
3871 | buf = wpabuf_alloc(len); | |
86cd6928 JM |
3872 | if (!buf) |
3873 | return NULL; | |
3874 | ||
7d440a3b JM |
3875 | #ifdef CONFIG_IEEE80211R |
3876 | if (wpa_key_mgmt_ft(sm->key_mgmt) && sm->fils_ft_ies) { | |
3877 | /* MDE and FTE when using FILS+FT */ | |
3878 | wpabuf_put_buf(buf, sm->fils_ft_ies); | |
3879 | /* RSNE with PMKR1Name in PMKID field */ | |
3880 | if (fils_ft_build_assoc_req_rsne(sm, buf) < 0) { | |
3881 | wpabuf_free(buf); | |
3882 | return NULL; | |
3883 | } | |
3884 | } | |
3885 | #endif /* CONFIG_IEEE80211R */ | |
3886 | ||
86cd6928 JM |
3887 | /* FILS Session */ |
3888 | wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */ | |
3889 | wpabuf_put_u8(buf, 1 + FILS_SESSION_LEN); /* Length */ | |
3890 | /* Element ID Extension */ | |
3891 | wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_SESSION); | |
3892 | wpabuf_put_data(buf, sm->fils_session, FILS_SESSION_LEN); | |
3893 | ||
3894 | /* Everything after FILS Session element gets encrypted in the driver | |
3895 | * with KEK. The buffer returned from here is the plaintext version. */ | |
3896 | ||
3897 | /* TODO: FILS Public Key */ | |
3898 | ||
3899 | /* FILS Key Confirm */ | |
3900 | wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */ | |
3901 | wpabuf_put_u8(buf, 1 + sm->fils_key_auth_len); /* Length */ | |
3902 | /* Element ID Extension */ | |
3903 | wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_KEY_CONFIRM); | |
3904 | wpabuf_put_data(buf, sm->fils_key_auth_sta, sm->fils_key_auth_len); | |
3905 | ||
5732b770 JM |
3906 | /* FILS HLP Container */ |
3907 | for (i = 0; hlp && i < num_hlp; i++) { | |
3908 | const u8 *pos = wpabuf_head(hlp[i]); | |
3909 | size_t left = wpabuf_len(hlp[i]); | |
3910 | ||
3911 | wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */ | |
3912 | if (left <= 254) | |
3913 | len = 1 + left; | |
3914 | else | |
3915 | len = 255; | |
3916 | wpabuf_put_u8(buf, len); /* Length */ | |
3917 | /* Element ID Extension */ | |
3918 | wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_HLP_CONTAINER); | |
3919 | /* Destination MAC Address, Source MAC Address, HLP Packet. | |
3920 | * HLP Packet is in MSDU format (i.e., included the LLC/SNAP | |
3921 | * header when LPD is used). */ | |
3922 | wpabuf_put_data(buf, pos, len - 1); | |
3923 | pos += len - 1; | |
3924 | left -= len - 1; | |
3925 | while (left) { | |
3926 | wpabuf_put_u8(buf, WLAN_EID_FRAGMENT); | |
3927 | len = left > 255 ? 255 : left; | |
3928 | wpabuf_put_u8(buf, len); | |
3929 | wpabuf_put_data(buf, pos, len); | |
3930 | pos += len; | |
3931 | left -= len; | |
3932 | } | |
3933 | } | |
86cd6928 JM |
3934 | |
3935 | /* TODO: FILS IP Address Assignment */ | |
3936 | ||
3937 | wpa_hexdump_buf(MSG_DEBUG, "FILS: Association Request plaintext", buf); | |
3938 | ||
3939 | *kek = sm->ptk.kek; | |
3940 | *kek_len = sm->ptk.kek_len; | |
3941 | wpa_hexdump_key(MSG_DEBUG, "FILS: KEK for AEAD", *kek, *kek_len); | |
3942 | *snonce = sm->fils_nonce; | |
3943 | wpa_hexdump(MSG_DEBUG, "FILS: SNonce for AEAD AAD", | |
3944 | *snonce, FILS_NONCE_LEN); | |
3945 | *anonce = sm->fils_anonce; | |
3946 | wpa_hexdump(MSG_DEBUG, "FILS: ANonce for AEAD AAD", | |
3947 | *anonce, FILS_NONCE_LEN); | |
3948 | ||
3949 | return buf; | |
3950 | } | |
3951 | ||
706df429 | 3952 | |
124ddfa1 JM |
3953 | static void fils_process_hlp_resp(struct wpa_sm *sm, const u8 *resp, size_t len) |
3954 | { | |
3955 | const u8 *pos, *end; | |
3956 | ||
3957 | wpa_hexdump(MSG_MSGDUMP, "FILS: HLP response", resp, len); | |
3958 | if (len < 2 * ETH_ALEN) | |
3959 | return; | |
3960 | pos = resp + 2 * ETH_ALEN; | |
3961 | end = resp + len; | |
3962 | if (end - pos >= 6 && | |
3963 | os_memcmp(pos, "\xaa\xaa\x03\x00\x00\x00", 6) == 0) | |
3964 | pos += 6; /* Remove SNAP/LLC header */ | |
3965 | wpa_sm_fils_hlp_rx(sm, resp, resp + ETH_ALEN, pos, end - pos); | |
3966 | } | |
3967 | ||
3968 | ||
3969 | static void fils_process_hlp_container(struct wpa_sm *sm, const u8 *pos, | |
3970 | size_t len) | |
3971 | { | |
3972 | const u8 *end = pos + len; | |
3973 | u8 *tmp, *tmp_pos; | |
3974 | ||
3975 | /* Check if there are any FILS HLP Container elements */ | |
3976 | while (end - pos >= 2) { | |
3977 | if (2 + pos[1] > end - pos) | |
3978 | return; | |
3979 | if (pos[0] == WLAN_EID_EXTENSION && | |
3980 | pos[1] >= 1 + 2 * ETH_ALEN && | |
3981 | pos[2] == WLAN_EID_EXT_FILS_HLP_CONTAINER) | |
3982 | break; | |
3983 | pos += 2 + pos[1]; | |
3984 | } | |
3985 | if (end - pos < 2) | |
3986 | return; /* No FILS HLP Container elements */ | |
3987 | ||
3988 | tmp = os_malloc(end - pos); | |
3989 | if (!tmp) | |
3990 | return; | |
3991 | ||
3992 | while (end - pos >= 2) { | |
3993 | if (2 + pos[1] > end - pos || | |
3994 | pos[0] != WLAN_EID_EXTENSION || | |
3995 | pos[1] < 1 + 2 * ETH_ALEN || | |
3996 | pos[2] != WLAN_EID_EXT_FILS_HLP_CONTAINER) | |
3997 | break; | |
3998 | tmp_pos = tmp; | |
3999 | os_memcpy(tmp_pos, pos + 3, pos[1] - 1); | |
4000 | tmp_pos += pos[1] - 1; | |
4001 | pos += 2 + pos[1]; | |
4002 | ||
4003 | /* Add possible fragments */ | |
4004 | while (end - pos >= 2 && pos[0] == WLAN_EID_FRAGMENT && | |
4005 | 2 + pos[1] <= end - pos) { | |
4006 | os_memcpy(tmp_pos, pos + 2, pos[1]); | |
4007 | tmp_pos += pos[1]; | |
4008 | pos += 2 + pos[1]; | |
4009 | } | |
4010 | ||
4011 | fils_process_hlp_resp(sm, tmp, tmp_pos - tmp); | |
4012 | } | |
4013 | ||
4014 | os_free(tmp); | |
4015 | } | |
4016 | ||
4017 | ||
706df429 JM |
4018 | int fils_process_assoc_resp(struct wpa_sm *sm, const u8 *resp, size_t len) |
4019 | { | |
4020 | const struct ieee80211_mgmt *mgmt; | |
4021 | const u8 *end, *ie_start; | |
4022 | struct ieee802_11_elems elems; | |
4023 | int keylen, rsclen; | |
4024 | enum wpa_alg alg; | |
4025 | struct wpa_gtk_data gd; | |
4026 | int maxkeylen; | |
4027 | struct wpa_eapol_ie_parse kde; | |
4028 | ||
4029 | if (!sm || !sm->ptk_set) { | |
4030 | wpa_printf(MSG_DEBUG, "FILS: No KEK available"); | |
4031 | return -1; | |
4032 | } | |
4033 | ||
4034 | if (!wpa_key_mgmt_fils(sm->key_mgmt)) { | |
4035 | wpa_printf(MSG_DEBUG, "FILS: Not a FILS AKM"); | |
4036 | return -1; | |
4037 | } | |
4038 | ||
e7608511 JM |
4039 | if (sm->fils_completed) { |
4040 | wpa_printf(MSG_DEBUG, | |
4041 | "FILS: Association has already been completed for this FILS authentication - ignore unexpected retransmission"); | |
4042 | return -1; | |
4043 | } | |
4044 | ||
706df429 JM |
4045 | wpa_hexdump(MSG_DEBUG, "FILS: (Re)Association Response frame", |
4046 | resp, len); | |
4047 | ||
4048 | mgmt = (const struct ieee80211_mgmt *) resp; | |
4049 | if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_resp)) | |
4050 | return -1; | |
4051 | ||
4052 | end = resp + len; | |
4053 | /* Same offset for Association Response and Reassociation Response */ | |
4054 | ie_start = mgmt->u.assoc_resp.variable; | |
4055 | ||
4056 | if (ieee802_11_parse_elems(ie_start, end - ie_start, &elems, 1) == | |
4057 | ParseFailed) { | |
4058 | wpa_printf(MSG_DEBUG, | |
4059 | "FILS: Failed to parse decrypted elements"); | |
4060 | goto fail; | |
4061 | } | |
4062 | ||
4063 | if (!elems.fils_session) { | |
4064 | wpa_printf(MSG_DEBUG, "FILS: No FILS Session element"); | |
4065 | return -1; | |
4066 | } | |
4067 | if (os_memcmp(elems.fils_session, sm->fils_session, | |
4068 | FILS_SESSION_LEN) != 0) { | |
4069 | wpa_printf(MSG_DEBUG, "FILS: FILS Session mismatch"); | |
4070 | wpa_hexdump(MSG_DEBUG, "FILS: Received FILS Session", | |
4071 | elems.fils_session, FILS_SESSION_LEN); | |
4072 | wpa_hexdump(MSG_DEBUG, "FILS: Expected FILS Session", | |
4073 | sm->fils_session, FILS_SESSION_LEN); | |
4074 | } | |
4075 | ||
4076 | /* TODO: FILS Public Key */ | |
4077 | ||
4078 | if (!elems.fils_key_confirm) { | |
4079 | wpa_printf(MSG_DEBUG, "FILS: No FILS Key Confirm element"); | |
4080 | goto fail; | |
4081 | } | |
4082 | if (elems.fils_key_confirm_len != sm->fils_key_auth_len) { | |
4083 | wpa_printf(MSG_DEBUG, | |
4084 | "FILS: Unexpected Key-Auth length %d (expected %d)", | |
4085 | elems.fils_key_confirm_len, | |
4086 | (int) sm->fils_key_auth_len); | |
4087 | goto fail; | |
4088 | } | |
4089 | if (os_memcmp(elems.fils_key_confirm, sm->fils_key_auth_ap, | |
4090 | sm->fils_key_auth_len) != 0) { | |
4091 | wpa_printf(MSG_DEBUG, "FILS: Key-Auth mismatch"); | |
4092 | wpa_hexdump(MSG_DEBUG, "FILS: Received Key-Auth", | |
4093 | elems.fils_key_confirm, | |
4094 | elems.fils_key_confirm_len); | |
4095 | wpa_hexdump(MSG_DEBUG, "FILS: Expected Key-Auth", | |
4096 | sm->fils_key_auth_ap, sm->fils_key_auth_len); | |
4097 | goto fail; | |
4098 | } | |
4099 | ||
4100 | /* Key Delivery */ | |
4101 | if (!elems.key_delivery) { | |
4102 | wpa_printf(MSG_DEBUG, "FILS: No Key Delivery element"); | |
4103 | goto fail; | |
4104 | } | |
4105 | ||
4106 | /* Parse GTK and set the key to the driver */ | |
4107 | os_memset(&gd, 0, sizeof(gd)); | |
4108 | if (wpa_supplicant_parse_ies(elems.key_delivery + WPA_KEY_RSC_LEN, | |
4109 | elems.key_delivery_len - WPA_KEY_RSC_LEN, | |
4110 | &kde) < 0) { | |
4111 | wpa_printf(MSG_DEBUG, "FILS: Failed to parse KDEs"); | |
4112 | goto fail; | |
4113 | } | |
4114 | if (!kde.gtk) { | |
4115 | wpa_printf(MSG_DEBUG, "FILS: No GTK KDE"); | |
4116 | goto fail; | |
4117 | } | |
4118 | maxkeylen = gd.gtk_len = kde.gtk_len - 2; | |
4119 | if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, | |
4120 | gd.gtk_len, maxkeylen, | |
4121 | &gd.key_rsc_len, &gd.alg)) | |
4122 | goto fail; | |
4123 | ||
4124 | wpa_hexdump_key(MSG_DEBUG, "FILS: Received GTK", kde.gtk, kde.gtk_len); | |
4125 | gd.keyidx = kde.gtk[0] & 0x3; | |
4126 | gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm, | |
4127 | !!(kde.gtk[0] & BIT(2))); | |
4128 | if (kde.gtk_len - 2 > sizeof(gd.gtk)) { | |
4129 | wpa_printf(MSG_DEBUG, "FILS: Too long GTK in GTK KDE (len=%lu)", | |
4130 | (unsigned long) kde.gtk_len - 2); | |
4131 | goto fail; | |
4132 | } | |
4133 | os_memcpy(gd.gtk, kde.gtk + 2, kde.gtk_len - 2); | |
4134 | ||
4135 | wpa_printf(MSG_DEBUG, "FILS: Set GTK to driver"); | |
87e2db16 | 4136 | if (wpa_supplicant_install_gtk(sm, &gd, elems.key_delivery, 0) < 0) { |
706df429 JM |
4137 | wpa_printf(MSG_DEBUG, "FILS: Failed to set GTK"); |
4138 | goto fail; | |
4139 | } | |
4140 | ||
4141 | if (ieee80211w_set_keys(sm, &kde) < 0) { | |
4142 | wpa_printf(MSG_DEBUG, "FILS: Failed to set IGTK"); | |
4143 | goto fail; | |
4144 | } | |
4145 | ||
4146 | alg = wpa_cipher_to_alg(sm->pairwise_cipher); | |
4147 | keylen = wpa_cipher_key_len(sm->pairwise_cipher); | |
a6ea6653 JM |
4148 | if (keylen <= 0 || (unsigned int) keylen != sm->ptk.tk_len) { |
4149 | wpa_printf(MSG_DEBUG, "FILS: TK length mismatch: %u != %lu", | |
4150 | keylen, (long unsigned int) sm->ptk.tk_len); | |
4151 | goto fail; | |
4152 | } | |
706df429 JM |
4153 | rsclen = wpa_cipher_rsc_len(sm->pairwise_cipher); |
4154 | wpa_hexdump_key(MSG_DEBUG, "FILS: Set TK to driver", | |
4155 | sm->ptk.tk, keylen); | |
4156 | if (wpa_sm_set_key(sm, alg, sm->bssid, 0, 1, null_rsc, rsclen, | |
4157 | sm->ptk.tk, keylen) < 0) { | |
4158 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, | |
4159 | "FILS: Failed to set PTK to the driver (alg=%d keylen=%d bssid=" | |
4160 | MACSTR ")", | |
4161 | alg, keylen, MAC2STR(sm->bssid)); | |
4162 | goto fail; | |
4163 | } | |
4164 | ||
4165 | /* TODO: TK could be cleared after auth frame exchange now that driver | |
4166 | * takes care of association frame encryption/decryption. */ | |
4167 | /* TK is not needed anymore in supplicant */ | |
4168 | os_memset(sm->ptk.tk, 0, WPA_TK_MAX_LEN); | |
a6ea6653 | 4169 | sm->ptk.tk_len = 0; |
53bb18cc | 4170 | sm->ptk.installed = 1; |
706df429 | 4171 | |
124ddfa1 JM |
4172 | /* FILS HLP Container */ |
4173 | fils_process_hlp_container(sm, ie_start, end - ie_start); | |
706df429 JM |
4174 | |
4175 | /* TODO: FILS IP Address Assignment */ | |
4176 | ||
4177 | wpa_printf(MSG_DEBUG, "FILS: Auth+Assoc completed successfully"); | |
4178 | sm->fils_completed = 1; | |
4179 | ||
4180 | return 0; | |
4181 | fail: | |
4182 | return -1; | |
4183 | } | |
4184 | ||
5538fc93 VK |
4185 | |
4186 | void wpa_sm_set_reset_fils_completed(struct wpa_sm *sm, int set) | |
4187 | { | |
4188 | if (sm) | |
4189 | sm->fils_completed = !!set; | |
4190 | } | |
4191 | ||
706df429 JM |
4192 | #endif /* CONFIG_FILS */ |
4193 | ||
4194 | ||
4195 | int wpa_fils_is_completed(struct wpa_sm *sm) | |
4196 | { | |
4197 | #ifdef CONFIG_FILS | |
4198 | return sm && sm->fils_completed; | |
4199 | #else /* CONFIG_FILS */ | |
4200 | return 0; | |
f00b9b88 | 4201 | #endif /* CONFIG_FILS */ |
706df429 | 4202 | } |
0a614799 JM |
4203 | |
4204 | ||
4205 | #ifdef CONFIG_OWE | |
4206 | ||
ec9f4837 | 4207 | struct wpabuf * owe_build_assoc_req(struct wpa_sm *sm, u16 group) |
0a614799 JM |
4208 | { |
4209 | struct wpabuf *ie = NULL, *pub = NULL; | |
ec9f4837 JM |
4210 | size_t prime_len; |
4211 | ||
4212 | if (group == 19) | |
4213 | prime_len = 32; | |
4214 | else if (group == 20) | |
4215 | prime_len = 48; | |
4216 | else if (group == 21) | |
4217 | prime_len = 66; | |
4218 | else | |
4219 | return NULL; | |
0a614799 JM |
4220 | |
4221 | crypto_ecdh_deinit(sm->owe_ecdh); | |
ec9f4837 | 4222 | sm->owe_ecdh = crypto_ecdh_init(group); |
0a614799 JM |
4223 | if (!sm->owe_ecdh) |
4224 | goto fail; | |
ec9f4837 | 4225 | sm->owe_group = group; |
0a614799 | 4226 | pub = crypto_ecdh_get_pubkey(sm->owe_ecdh, 0); |
ec9f4837 | 4227 | pub = wpabuf_zeropad(pub, prime_len); |
0a614799 JM |
4228 | if (!pub) |
4229 | goto fail; | |
4230 | ||
4231 | ie = wpabuf_alloc(5 + wpabuf_len(pub)); | |
4232 | if (!ie) | |
4233 | goto fail; | |
4234 | wpabuf_put_u8(ie, WLAN_EID_EXTENSION); | |
4235 | wpabuf_put_u8(ie, 1 + 2 + wpabuf_len(pub)); | |
4236 | wpabuf_put_u8(ie, WLAN_EID_EXT_OWE_DH_PARAM); | |
ec9f4837 | 4237 | wpabuf_put_le16(ie, group); |
0a614799 JM |
4238 | wpabuf_put_buf(ie, pub); |
4239 | wpabuf_free(pub); | |
4240 | wpa_hexdump_buf(MSG_DEBUG, "OWE: Diffie-Hellman Parameter element", | |
4241 | ie); | |
4242 | ||
4243 | return ie; | |
4244 | fail: | |
4245 | wpabuf_free(pub); | |
4246 | crypto_ecdh_deinit(sm->owe_ecdh); | |
4247 | sm->owe_ecdh = NULL; | |
4248 | return NULL; | |
4249 | } | |
4250 | ||
4251 | ||
5a78c361 JM |
4252 | int owe_process_assoc_resp(struct wpa_sm *sm, const u8 *bssid, |
4253 | const u8 *resp_ies, size_t resp_ies_len) | |
0a614799 JM |
4254 | { |
4255 | struct ieee802_11_elems elems; | |
4256 | u16 group; | |
4257 | struct wpabuf *secret, *pub, *hkey; | |
4258 | int res; | |
ec9f4837 | 4259 | u8 prk[SHA512_MAC_LEN], pmkid[SHA512_MAC_LEN]; |
0a614799 JM |
4260 | const char *info = "OWE Key Generation"; |
4261 | const u8 *addr[2]; | |
4262 | size_t len[2]; | |
ec9f4837 | 4263 | size_t hash_len, prime_len; |
5a78c361 | 4264 | struct wpa_ie_data data; |
0a614799 JM |
4265 | |
4266 | if (!resp_ies || | |
4267 | ieee802_11_parse_elems(resp_ies, resp_ies_len, &elems, 1) == | |
5a78c361 JM |
4268 | ParseFailed) { |
4269 | wpa_printf(MSG_INFO, | |
4270 | "OWE: Could not parse Association Response frame elements"); | |
4271 | return -1; | |
4272 | } | |
4273 | ||
4274 | if (sm->cur_pmksa && elems.rsn_ie && | |
4275 | wpa_parse_wpa_ie_rsn(elems.rsn_ie - 2, 2 + elems.rsn_ie_len, | |
4276 | &data) == 0 && | |
4277 | data.num_pmkid == 1 && data.pmkid && | |
4278 | os_memcmp(sm->cur_pmksa->pmkid, data.pmkid, PMKID_LEN) == 0) { | |
4279 | wpa_printf(MSG_DEBUG, "OWE: Use PMKSA caching"); | |
4280 | wpa_sm_set_pmk_from_pmksa(sm); | |
4281 | return 0; | |
4282 | } | |
4283 | ||
4284 | if (!elems.owe_dh) { | |
0a614799 JM |
4285 | wpa_printf(MSG_INFO, |
4286 | "OWE: No Diffie-Hellman Parameter element found in Association Response frame"); | |
4287 | return -1; | |
4288 | } | |
4289 | ||
4290 | group = WPA_GET_LE16(elems.owe_dh); | |
ec9f4837 | 4291 | if (group != sm->owe_group) { |
0a614799 JM |
4292 | wpa_printf(MSG_INFO, |
4293 | "OWE: Unexpected Diffie-Hellman group in response: %u", | |
4294 | group); | |
4295 | return -1; | |
4296 | } | |
4297 | ||
4298 | if (!sm->owe_ecdh) { | |
4299 | wpa_printf(MSG_INFO, "OWE: No ECDH state available"); | |
4300 | return -1; | |
4301 | } | |
4302 | ||
ec9f4837 JM |
4303 | if (group == 19) |
4304 | prime_len = 32; | |
4305 | else if (group == 20) | |
4306 | prime_len = 48; | |
4307 | else if (group == 21) | |
4308 | prime_len = 66; | |
4309 | else | |
4310 | return -1; | |
4311 | ||
0a614799 JM |
4312 | secret = crypto_ecdh_set_peerkey(sm->owe_ecdh, 0, |
4313 | elems.owe_dh + 2, | |
4314 | elems.owe_dh_len - 2); | |
ec9f4837 | 4315 | secret = wpabuf_zeropad(secret, prime_len); |
0a614799 JM |
4316 | if (!secret) { |
4317 | wpa_printf(MSG_DEBUG, "OWE: Invalid peer DH public key"); | |
4318 | return -1; | |
4319 | } | |
4320 | wpa_hexdump_buf_key(MSG_DEBUG, "OWE: DH shared secret", secret); | |
4321 | ||
4322 | /* prk = HKDF-extract(C | A | group, z) */ | |
4323 | ||
4324 | pub = crypto_ecdh_get_pubkey(sm->owe_ecdh, 0); | |
4325 | if (!pub) { | |
4326 | wpabuf_clear_free(secret); | |
4327 | return -1; | |
4328 | } | |
4329 | ||
4330 | /* PMKID = Truncate-128(Hash(C | A)) */ | |
4331 | addr[0] = wpabuf_head(pub); | |
4332 | len[0] = wpabuf_len(pub); | |
4333 | addr[1] = elems.owe_dh + 2; | |
4334 | len[1] = elems.owe_dh_len - 2; | |
ec9f4837 JM |
4335 | if (group == 19) { |
4336 | res = sha256_vector(2, addr, len, pmkid); | |
4337 | hash_len = SHA256_MAC_LEN; | |
4338 | } else if (group == 20) { | |
4339 | res = sha384_vector(2, addr, len, pmkid); | |
4340 | hash_len = SHA384_MAC_LEN; | |
4341 | } else if (group == 21) { | |
4342 | res = sha512_vector(2, addr, len, pmkid); | |
4343 | hash_len = SHA512_MAC_LEN; | |
4344 | } else { | |
4345 | res = -1; | |
4346 | hash_len = 0; | |
4347 | } | |
4348 | pub = wpabuf_zeropad(pub, prime_len); | |
4349 | if (res < 0 || !pub) { | |
0a614799 JM |
4350 | wpabuf_free(pub); |
4351 | wpabuf_clear_free(secret); | |
4352 | return -1; | |
4353 | } | |
4354 | ||
4355 | hkey = wpabuf_alloc(wpabuf_len(pub) + elems.owe_dh_len - 2 + 2); | |
4356 | if (!hkey) { | |
4357 | wpabuf_free(pub); | |
4358 | wpabuf_clear_free(secret); | |
4359 | return -1; | |
4360 | } | |
4361 | ||
4362 | wpabuf_put_buf(hkey, pub); /* C */ | |
4363 | wpabuf_free(pub); | |
4364 | wpabuf_put_data(hkey, elems.owe_dh + 2, elems.owe_dh_len - 2); /* A */ | |
ec9f4837 JM |
4365 | wpabuf_put_le16(hkey, sm->owe_group); /* group */ |
4366 | if (group == 19) | |
4367 | res = hmac_sha256(wpabuf_head(hkey), wpabuf_len(hkey), | |
4368 | wpabuf_head(secret), wpabuf_len(secret), prk); | |
4369 | else if (group == 20) | |
4370 | res = hmac_sha384(wpabuf_head(hkey), wpabuf_len(hkey), | |
4371 | wpabuf_head(secret), wpabuf_len(secret), prk); | |
4372 | else if (group == 21) | |
4373 | res = hmac_sha512(wpabuf_head(hkey), wpabuf_len(hkey), | |
4374 | wpabuf_head(secret), wpabuf_len(secret), prk); | |
0a614799 JM |
4375 | wpabuf_clear_free(hkey); |
4376 | wpabuf_clear_free(secret); | |
4377 | if (res < 0) | |
4378 | return -1; | |
4379 | ||
ec9f4837 | 4380 | wpa_hexdump_key(MSG_DEBUG, "OWE: prk", prk, hash_len); |
0a614799 JM |
4381 | |
4382 | /* PMK = HKDF-expand(prk, "OWE Key Generation", n) */ | |
4383 | ||
ec9f4837 JM |
4384 | if (group == 19) |
4385 | res = hmac_sha256_kdf(prk, hash_len, NULL, (const u8 *) info, | |
4386 | os_strlen(info), sm->pmk, hash_len); | |
4387 | else if (group == 20) | |
4388 | res = hmac_sha384_kdf(prk, hash_len, NULL, (const u8 *) info, | |
4389 | os_strlen(info), sm->pmk, hash_len); | |
4390 | else if (group == 21) | |
4391 | res = hmac_sha512_kdf(prk, hash_len, NULL, (const u8 *) info, | |
4392 | os_strlen(info), sm->pmk, hash_len); | |
4393 | os_memset(prk, 0, SHA512_MAC_LEN); | |
1bd13110 JM |
4394 | if (res < 0) { |
4395 | sm->pmk_len = 0; | |
0a614799 | 4396 | return -1; |
1bd13110 | 4397 | } |
ec9f4837 | 4398 | sm->pmk_len = hash_len; |
0a614799 | 4399 | |
ec9f4837 | 4400 | wpa_hexdump_key(MSG_DEBUG, "OWE: PMK", sm->pmk, sm->pmk_len); |
0a614799 | 4401 | wpa_hexdump(MSG_DEBUG, "OWE: PMKID", pmkid, PMKID_LEN); |
5a78c361 JM |
4402 | pmksa_cache_add(sm->pmksa, sm->pmk, sm->pmk_len, pmkid, NULL, 0, |
4403 | bssid, sm->own_addr, sm->network_ctx, sm->key_mgmt, | |
4404 | NULL); | |
0a614799 JM |
4405 | |
4406 | return 0; | |
4407 | } | |
4408 | ||
4409 | #endif /* CONFIG_OWE */ | |
bbe7969d VK |
4410 | |
4411 | ||
4412 | void wpa_sm_set_fils_cache_id(struct wpa_sm *sm, const u8 *fils_cache_id) | |
4413 | { | |
4414 | #ifdef CONFIG_FILS | |
4415 | if (sm && fils_cache_id) { | |
4416 | sm->fils_cache_id_set = 1; | |
4417 | os_memcpy(sm->fils_cache_id, fils_cache_id, FILS_CACHE_ID_LEN); | |
4418 | } | |
4419 | #endif /* CONFIG_FILS */ | |
4420 | } |