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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" |
17c2559c | 23 | #include "common/ocv.h" |
fcd3d6ce | 24 | #include "eap_common/eap_defs.h" |
03da66bd | 25 | #include "eapol_supp/eapol_supp_sm.h" |
17c2559c | 26 | #include "drivers/driver.h" |
6fc6879b JM |
27 | #include "wpa.h" |
28 | #include "eloop.h" | |
6fc6879b JM |
29 | #include "preauth.h" |
30 | #include "pmksa_cache.h" | |
31 | #include "wpa_i.h" | |
32 | #include "wpa_ie.h" | |
6fc6879b JM |
33 | |
34 | ||
73ed03f3 MS |
35 | static const u8 null_rsc[8] = { 0, 0, 0, 0, 0, 0, 0, 0 }; |
36 | ||
37 | ||
6fc6879b JM |
38 | /** |
39 | * wpa_eapol_key_send - Send WPA/RSN EAPOL-Key message | |
40 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
1049af7e | 41 | * @ptk: PTK for Key Confirmation/Encryption Key |
6fc6879b JM |
42 | * @ver: Version field from Key Info |
43 | * @dest: Destination address for the frame | |
44 | * @proto: Ethertype (usually ETH_P_EAPOL) | |
45 | * @msg: EAPOL-Key message | |
46 | * @msg_len: Length of message | |
47 | * @key_mic: Pointer to the buffer to which the EAPOL-Key MIC is written | |
c93b7e18 | 48 | * Returns: >= 0 on success, < 0 on failure |
6fc6879b | 49 | */ |
1049af7e | 50 | int wpa_eapol_key_send(struct wpa_sm *sm, struct wpa_ptk *ptk, |
c93b7e18 AA |
51 | int ver, const u8 *dest, u16 proto, |
52 | u8 *msg, size_t msg_len, u8 *key_mic) | |
6fc6879b | 53 | { |
c93b7e18 | 54 | int ret = -1; |
567da5bb | 55 | size_t mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len); |
98cd3d1c | 56 | |
ef9627cb JM |
57 | wpa_printf(MSG_DEBUG, "WPA: Send EAPOL-Key frame to " MACSTR |
58 | " ver=%d mic_len=%d key_mgmt=0x%x", | |
59 | MAC2STR(dest), ver, (int) mic_len, sm->key_mgmt); | |
a8e16edc | 60 | if (is_zero_ether_addr(dest) && is_zero_ether_addr(sm->bssid)) { |
6fc6879b JM |
61 | /* |
62 | * Association event was not yet received; try to fetch | |
63 | * BSSID from the driver. | |
64 | */ | |
65 | if (wpa_sm_get_bssid(sm, sm->bssid) < 0) { | |
f049052b BG |
66 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
67 | "WPA: Failed to read BSSID for " | |
68 | "EAPOL-Key destination address"); | |
6fc6879b JM |
69 | } else { |
70 | dest = sm->bssid; | |
f049052b BG |
71 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
72 | "WPA: Use BSSID (" MACSTR | |
73 | ") as the destination for EAPOL-Key", | |
74 | MAC2STR(dest)); | |
6fc6879b JM |
75 | } |
76 | } | |
2022f1d0 JM |
77 | |
78 | if (mic_len) { | |
79 | if (key_mic && (!ptk || !ptk->kck_len)) | |
80 | goto out; | |
81 | ||
82 | if (key_mic && | |
83 | wpa_eapol_key_mic(ptk->kck, ptk->kck_len, sm->key_mgmt, ver, | |
84 | msg, msg_len, key_mic)) { | |
85 | wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, | |
86 | "WPA: Failed to generate EAPOL-Key version %d key_mgmt 0x%x MIC", | |
87 | ver, sm->key_mgmt); | |
88 | goto out; | |
89 | } | |
28fb9bb1 JM |
90 | if (ptk) |
91 | wpa_hexdump_key(MSG_DEBUG, "WPA: KCK", | |
92 | ptk->kck, ptk->kck_len); | |
2022f1d0 JM |
93 | wpa_hexdump(MSG_DEBUG, "WPA: Derived Key MIC", |
94 | key_mic, mic_len); | |
95 | } else { | |
96 | #ifdef CONFIG_FILS | |
97 | /* AEAD cipher - Key MIC field not used */ | |
98 | struct ieee802_1x_hdr *s_hdr, *hdr; | |
99 | struct wpa_eapol_key *s_key, *key; | |
100 | u8 *buf, *s_key_data, *key_data; | |
101 | size_t buf_len = msg_len + AES_BLOCK_SIZE; | |
102 | size_t key_data_len; | |
103 | u16 eapol_len; | |
104 | const u8 *aad[1]; | |
105 | size_t aad_len[1]; | |
106 | ||
107 | if (!ptk || !ptk->kek_len) | |
108 | goto out; | |
109 | ||
110 | key_data_len = msg_len - sizeof(struct ieee802_1x_hdr) - | |
111 | sizeof(struct wpa_eapol_key) - 2; | |
112 | ||
113 | buf = os_malloc(buf_len); | |
114 | if (!buf) | |
115 | goto out; | |
116 | ||
117 | os_memcpy(buf, msg, msg_len); | |
118 | hdr = (struct ieee802_1x_hdr *) buf; | |
119 | key = (struct wpa_eapol_key *) (hdr + 1); | |
120 | key_data = ((u8 *) (key + 1)) + 2; | |
121 | ||
122 | /* Update EAPOL header to include AES-SIV overhead */ | |
123 | eapol_len = be_to_host16(hdr->length); | |
124 | eapol_len += AES_BLOCK_SIZE; | |
125 | hdr->length = host_to_be16(eapol_len); | |
126 | ||
127 | /* Update Key Data Length field to include AES-SIV overhead */ | |
128 | WPA_PUT_BE16((u8 *) (key + 1), AES_BLOCK_SIZE + key_data_len); | |
129 | ||
130 | s_hdr = (struct ieee802_1x_hdr *) msg; | |
131 | s_key = (struct wpa_eapol_key *) (s_hdr + 1); | |
132 | s_key_data = ((u8 *) (s_key + 1)) + 2; | |
133 | ||
134 | wpa_hexdump_key(MSG_DEBUG, "WPA: Plaintext Key Data", | |
135 | s_key_data, key_data_len); | |
136 | ||
137 | wpa_hexdump_key(MSG_DEBUG, "WPA: KEK", ptk->kek, ptk->kek_len); | |
138 | /* AES-SIV AAD from EAPOL protocol version field (inclusive) to | |
139 | * to Key Data (exclusive). */ | |
140 | aad[0] = buf; | |
141 | aad_len[0] = key_data - buf; | |
142 | if (aes_siv_encrypt(ptk->kek, ptk->kek_len, | |
143 | s_key_data, key_data_len, | |
144 | 1, aad, aad_len, key_data) < 0) { | |
145 | os_free(buf); | |
146 | goto out; | |
147 | } | |
148 | ||
149 | wpa_hexdump(MSG_DEBUG, "WPA: Encrypted Key Data from SIV", | |
150 | key_data, AES_BLOCK_SIZE + key_data_len); | |
151 | ||
152 | os_free(msg); | |
153 | msg = buf; | |
154 | msg_len = buf_len; | |
155 | #else /* CONFIG_FILS */ | |
04b6b3ed | 156 | goto out; |
2022f1d0 | 157 | #endif /* CONFIG_FILS */ |
04b6b3ed | 158 | } |
2022f1d0 | 159 | |
6fc6879b | 160 | wpa_hexdump(MSG_MSGDUMP, "WPA: TX EAPOL-Key", msg, msg_len); |
c93b7e18 | 161 | ret = wpa_sm_ether_send(sm, dest, proto, msg, msg_len); |
6fc6879b | 162 | eapol_sm_notify_tx_eapol_key(sm->eapol); |
04b6b3ed | 163 | out: |
6fc6879b | 164 | os_free(msg); |
c93b7e18 | 165 | return ret; |
6fc6879b JM |
166 | } |
167 | ||
168 | ||
169 | /** | |
170 | * wpa_sm_key_request - Send EAPOL-Key Request | |
171 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
172 | * @error: Indicate whether this is an Michael MIC error report | |
173 | * @pairwise: 1 = error report for pairwise packet, 0 = for group packet | |
6fc6879b JM |
174 | * |
175 | * Send an EAPOL-Key Request to the current authenticator. This function is | |
176 | * used to request rekeying and it is usually called when a local Michael MIC | |
177 | * failure is detected. | |
178 | */ | |
179 | void wpa_sm_key_request(struct wpa_sm *sm, int error, int pairwise) | |
180 | { | |
5e3b5197 | 181 | size_t mic_len, hdrlen, rlen; |
6fc6879b JM |
182 | struct wpa_eapol_key *reply; |
183 | int key_info, ver; | |
6d014ffc | 184 | u8 bssid[ETH_ALEN], *rbuf, *key_mic, *mic; |
6fc6879b | 185 | |
4bc801ab | 186 | if (wpa_use_akm_defined(sm->key_mgmt)) |
df0f01d9 JM |
187 | ver = WPA_KEY_INFO_TYPE_AKM_DEFINED; |
188 | else if (wpa_key_mgmt_ft(sm->key_mgmt) || | |
189 | wpa_key_mgmt_sha256(sm->key_mgmt)) | |
6fc6879b | 190 | ver = WPA_KEY_INFO_TYPE_AES_128_CMAC; |
eb7719ff | 191 | else if (sm->pairwise_cipher != WPA_CIPHER_TKIP) |
6fc6879b JM |
192 | ver = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES; |
193 | else | |
194 | ver = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4; | |
195 | ||
196 | if (wpa_sm_get_bssid(sm, bssid) < 0) { | |
f049052b BG |
197 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
198 | "Failed to read BSSID for EAPOL-Key request"); | |
6fc6879b JM |
199 | return; |
200 | } | |
201 | ||
567da5bb | 202 | mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len); |
6d014ffc | 203 | hdrlen = sizeof(*reply) + mic_len + 2; |
6fc6879b | 204 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, |
5e3b5197 | 205 | hdrlen, &rlen, (void *) &reply); |
6fc6879b JM |
206 | if (rbuf == NULL) |
207 | return; | |
208 | ||
a14896e8 JM |
209 | reply->type = (sm->proto == WPA_PROTO_RSN || |
210 | sm->proto == WPA_PROTO_OSEN) ? | |
6fc6879b JM |
211 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; |
212 | key_info = WPA_KEY_INFO_REQUEST | ver; | |
213 | if (sm->ptk_set) | |
4a26ccda JM |
214 | key_info |= WPA_KEY_INFO_SECURE; |
215 | if (sm->ptk_set && mic_len) | |
216 | key_info |= WPA_KEY_INFO_MIC; | |
6fc6879b JM |
217 | if (error) |
218 | key_info |= WPA_KEY_INFO_ERROR; | |
219 | if (pairwise) | |
220 | key_info |= WPA_KEY_INFO_KEY_TYPE; | |
221 | WPA_PUT_BE16(reply->key_info, key_info); | |
222 | WPA_PUT_BE16(reply->key_length, 0); | |
223 | os_memcpy(reply->replay_counter, sm->request_counter, | |
224 | WPA_REPLAY_COUNTER_LEN); | |
225 | inc_byte_array(sm->request_counter, WPA_REPLAY_COUNTER_LEN); | |
226 | ||
6d014ffc JM |
227 | mic = (u8 *) (reply + 1); |
228 | WPA_PUT_BE16(mic + mic_len, 0); | |
5e3b5197 JM |
229 | if (!(key_info & WPA_KEY_INFO_MIC)) |
230 | key_mic = NULL; | |
231 | else | |
6d014ffc | 232 | key_mic = mic; |
6fc6879b | 233 | |
f049052b BG |
234 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
235 | "WPA: Sending EAPOL-Key Request (error=%d " | |
236 | "pairwise=%d ptk_set=%d len=%lu)", | |
237 | error, pairwise, sm->ptk_set, (unsigned long) rlen); | |
1049af7e JM |
238 | wpa_eapol_key_send(sm, &sm->ptk, ver, bssid, ETH_P_EAPOL, rbuf, rlen, |
239 | key_mic); | |
6fc6879b JM |
240 | } |
241 | ||
242 | ||
b41f2684 CL |
243 | static void wpa_supplicant_key_mgmt_set_pmk(struct wpa_sm *sm) |
244 | { | |
245 | #ifdef CONFIG_IEEE80211R | |
246 | if (sm->key_mgmt == WPA_KEY_MGMT_FT_IEEE8021X) { | |
247 | if (wpa_sm_key_mgmt_set_pmk(sm, sm->xxkey, sm->xxkey_len)) | |
248 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
249 | "RSN: Cannot set low order 256 bits of MSK for key management offload"); | |
250 | } else { | |
251 | #endif /* CONFIG_IEEE80211R */ | |
252 | if (wpa_sm_key_mgmt_set_pmk(sm, sm->pmk, sm->pmk_len)) | |
253 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
254 | "RSN: Cannot set PMK for key management offload"); | |
255 | #ifdef CONFIG_IEEE80211R | |
256 | } | |
257 | #endif /* CONFIG_IEEE80211R */ | |
258 | } | |
259 | ||
260 | ||
6fc6879b JM |
261 | static int wpa_supplicant_get_pmk(struct wpa_sm *sm, |
262 | const unsigned char *src_addr, | |
263 | const u8 *pmkid) | |
264 | { | |
265 | int abort_cached = 0; | |
266 | ||
267 | if (pmkid && !sm->cur_pmksa) { | |
268 | /* When using drivers that generate RSN IE, wpa_supplicant may | |
269 | * not have enough time to get the association information | |
270 | * event before receiving this 1/4 message, so try to find a | |
271 | * matching PMKSA cache entry here. */ | |
96efeeb6 | 272 | sm->cur_pmksa = pmksa_cache_get(sm->pmksa, src_addr, pmkid, |
852b2f27 | 273 | NULL, 0); |
6fc6879b | 274 | if (sm->cur_pmksa) { |
f049052b BG |
275 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
276 | "RSN: found matching PMKID from PMKSA cache"); | |
6fc6879b | 277 | } else { |
f049052b BG |
278 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
279 | "RSN: no matching PMKID found"); | |
6fc6879b JM |
280 | abort_cached = 1; |
281 | } | |
282 | } | |
283 | ||
284 | if (pmkid && sm->cur_pmksa && | |
0d15b69f | 285 | os_memcmp_const(pmkid, sm->cur_pmksa->pmkid, PMKID_LEN) == 0) { |
6fc6879b JM |
286 | wpa_hexdump(MSG_DEBUG, "RSN: matched PMKID", pmkid, PMKID_LEN); |
287 | wpa_sm_set_pmk_from_pmksa(sm); | |
288 | wpa_hexdump_key(MSG_DEBUG, "RSN: PMK from PMKSA cache", | |
289 | sm->pmk, sm->pmk_len); | |
290 | eapol_sm_notify_cached(sm->eapol); | |
291 | #ifdef CONFIG_IEEE80211R | |
292 | sm->xxkey_len = 0; | |
a03f9d17 JM |
293 | #ifdef CONFIG_SAE |
294 | if (sm->key_mgmt == WPA_KEY_MGMT_FT_SAE && | |
295 | sm->pmk_len == PMK_LEN) { | |
296 | /* Need to allow FT key derivation to proceed with | |
297 | * PMK from SAE being used as the XXKey in cases where | |
298 | * the PMKID in msg 1/4 matches the PMKSA entry that was | |
299 | * just added based on SAE authentication for the | |
300 | * initial mobility domain association. */ | |
301 | os_memcpy(sm->xxkey, sm->pmk, sm->pmk_len); | |
302 | sm->xxkey_len = sm->pmk_len; | |
303 | } | |
304 | #endif /* CONFIG_SAE */ | |
6fc6879b | 305 | #endif /* CONFIG_IEEE80211R */ |
56586197 | 306 | } else if (wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) && sm->eapol) { |
6fc6879b | 307 | int res, pmk_len; |
16c51144 JM |
308 | #ifdef CONFIG_IEEE80211R |
309 | u8 buf[2 * PMK_LEN]; | |
310 | #endif /* CONFIG_IEEE80211R */ | |
207976f0 | 311 | |
834c5d68 | 312 | if (wpa_key_mgmt_sha384(sm->key_mgmt)) |
207976f0 JM |
313 | pmk_len = PMK_LEN_SUITE_B_192; |
314 | else | |
315 | pmk_len = PMK_LEN; | |
316 | res = eapol_sm_get_key(sm->eapol, sm->pmk, pmk_len); | |
6fc6879b | 317 | if (res) { |
207976f0 JM |
318 | if (pmk_len == PMK_LEN) { |
319 | /* | |
320 | * EAP-LEAP is an exception from other EAP | |
321 | * methods: it uses only 16-byte PMK. | |
322 | */ | |
323 | res = eapol_sm_get_key(sm->eapol, sm->pmk, 16); | |
324 | pmk_len = 16; | |
325 | } | |
16c51144 | 326 | } |
6fc6879b | 327 | #ifdef CONFIG_IEEE80211R |
16c51144 JM |
328 | if (res == 0 && |
329 | eapol_sm_get_key(sm->eapol, buf, 2 * PMK_LEN) == 0) { | |
330 | if (wpa_key_mgmt_sha384(sm->key_mgmt)) { | |
331 | os_memcpy(sm->xxkey, buf, SHA384_MAC_LEN); | |
332 | sm->xxkey_len = SHA384_MAC_LEN; | |
333 | } else { | |
334 | os_memcpy(sm->xxkey, buf + PMK_LEN, PMK_LEN); | |
335 | sm->xxkey_len = PMK_LEN; | |
336 | } | |
31bc66e4 | 337 | forced_memzero(buf, sizeof(buf)); |
16c51144 JM |
338 | if (sm->proto == WPA_PROTO_RSN && |
339 | wpa_key_mgmt_ft(sm->key_mgmt)) { | |
340 | struct rsn_pmksa_cache_entry *sa = NULL; | |
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 | wpa_hexdump_key(MSG_DEBUG, | |
348 | "FT: Cache XXKey/MPMK", | |
349 | sm->xxkey, sm->xxkey_len); | |
350 | sa = pmksa_cache_add(sm->pmksa, | |
351 | sm->xxkey, sm->xxkey_len, | |
352 | NULL, NULL, 0, | |
353 | src_addr, sm->own_addr, | |
354 | sm->network_ctx, | |
355 | sm->key_mgmt, | |
356 | fils_cache_id); | |
357 | if (!sm->cur_pmksa) | |
358 | sm->cur_pmksa = sa; | |
6fc6879b | 359 | } |
6fc6879b | 360 | } |
16c51144 | 361 | #endif /* CONFIG_IEEE80211R */ |
6fc6879b | 362 | if (res == 0) { |
a7f10d65 | 363 | struct rsn_pmksa_cache_entry *sa = NULL; |
869af307 JM |
364 | const u8 *fils_cache_id = NULL; |
365 | ||
366 | #ifdef CONFIG_FILS | |
367 | if (sm->fils_cache_id_set) | |
368 | fils_cache_id = sm->fils_cache_id; | |
369 | #endif /* CONFIG_FILS */ | |
370 | ||
6fc6879b JM |
371 | wpa_hexdump_key(MSG_DEBUG, "WPA: PMK from EAPOL state " |
372 | "machines", sm->pmk, pmk_len); | |
373 | sm->pmk_len = pmk_len; | |
b41f2684 | 374 | wpa_supplicant_key_mgmt_set_pmk(sm); |
715ed737 | 375 | if (sm->proto == WPA_PROTO_RSN && |
087a1f4e | 376 | !wpa_key_mgmt_suite_b(sm->key_mgmt) && |
715ed737 | 377 | !wpa_key_mgmt_ft(sm->key_mgmt)) { |
a7f10d65 | 378 | sa = pmksa_cache_add(sm->pmksa, |
70c93963 | 379 | sm->pmk, pmk_len, NULL, |
087a1f4e | 380 | NULL, 0, |
a7f10d65 JM |
381 | src_addr, sm->own_addr, |
382 | sm->network_ctx, | |
869af307 JM |
383 | sm->key_mgmt, |
384 | fils_cache_id); | |
f5a51b58 | 385 | } |
6fc6879b | 386 | if (!sm->cur_pmksa && pmkid && |
852b2f27 JM |
387 | pmksa_cache_get(sm->pmksa, src_addr, pmkid, NULL, |
388 | 0)) { | |
f049052b BG |
389 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
390 | "RSN: the new PMK matches with the " | |
391 | "PMKID"); | |
6fc6879b | 392 | abort_cached = 0; |
bddc51e8 JM |
393 | } else if (sa && !sm->cur_pmksa && pmkid) { |
394 | /* | |
395 | * It looks like the authentication server | |
396 | * derived mismatching MSK. This should not | |
397 | * really happen, but bugs happen.. There is not | |
398 | * much we can do here without knowing what | |
399 | * exactly caused the server to misbehave. | |
400 | */ | |
62417667 | 401 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
bddc51e8 JM |
402 | "RSN: PMKID mismatch - authentication server may have derived different MSK?!"); |
403 | return -1; | |
6fc6879b | 404 | } |
a7f10d65 JM |
405 | |
406 | if (!sm->cur_pmksa) | |
407 | sm->cur_pmksa = sa; | |
0a1a82db JM |
408 | #ifdef CONFIG_IEEE80211R |
409 | } else if (wpa_key_mgmt_ft(sm->key_mgmt) && sm->ft_protocol) { | |
410 | wpa_printf(MSG_DEBUG, | |
411 | "FT: Continue 4-way handshake without PMK/PMKID for association using FT protocol"); | |
412 | #endif /* CONFIG_IEEE80211R */ | |
6fc6879b | 413 | } else { |
0f057fb2 | 414 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
6fc6879b | 415 | "WPA: Failed to get master session key from " |
f049052b BG |
416 | "EAPOL state machines - key handshake " |
417 | "aborted"); | |
6fc6879b | 418 | if (sm->cur_pmksa) { |
f049052b BG |
419 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
420 | "RSN: Cancelled PMKSA caching " | |
421 | "attempt"); | |
6fc6879b JM |
422 | sm->cur_pmksa = NULL; |
423 | abort_cached = 1; | |
1ac2d4a9 | 424 | } else if (!abort_cached) { |
6fc6879b JM |
425 | return -1; |
426 | } | |
427 | } | |
428 | } | |
429 | ||
715ed737 | 430 | if (abort_cached && wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) && |
087a1f4e | 431 | !wpa_key_mgmt_suite_b(sm->key_mgmt) && |
a14896e8 JM |
432 | !wpa_key_mgmt_ft(sm->key_mgmt) && sm->key_mgmt != WPA_KEY_MGMT_OSEN) |
433 | { | |
6fc6879b JM |
434 | /* Send EAPOL-Start to trigger full EAP authentication. */ |
435 | u8 *buf; | |
436 | size_t buflen; | |
437 | ||
f049052b BG |
438 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
439 | "RSN: no PMKSA entry found - trigger " | |
440 | "full EAP authentication"); | |
6fc6879b JM |
441 | buf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_START, |
442 | NULL, 0, &buflen, NULL); | |
443 | if (buf) { | |
444 | wpa_sm_ether_send(sm, sm->bssid, ETH_P_EAPOL, | |
445 | buf, buflen); | |
446 | os_free(buf); | |
b4a1256d | 447 | return -2; |
6fc6879b JM |
448 | } |
449 | ||
450 | return -1; | |
451 | } | |
452 | ||
453 | return 0; | |
454 | } | |
455 | ||
456 | ||
457 | /** | |
458 | * wpa_supplicant_send_2_of_4 - Send message 2 of WPA/RSN 4-Way Handshake | |
459 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
460 | * @dst: Destination address for the frame | |
461 | * @key: Pointer to the EAPOL-Key frame header | |
462 | * @ver: Version bits from EAPOL-Key Key Info | |
463 | * @nonce: Nonce value for the EAPOL-Key frame | |
464 | * @wpa_ie: WPA/RSN IE | |
465 | * @wpa_ie_len: Length of the WPA/RSN IE | |
466 | * @ptk: PTK to use for keyed hash and encryption | |
c93b7e18 | 467 | * Returns: >= 0 on success, < 0 on failure |
6fc6879b JM |
468 | */ |
469 | int wpa_supplicant_send_2_of_4(struct wpa_sm *sm, const unsigned char *dst, | |
470 | const struct wpa_eapol_key *key, | |
471 | int ver, const u8 *nonce, | |
472 | const u8 *wpa_ie, size_t wpa_ie_len, | |
473 | struct wpa_ptk *ptk) | |
474 | { | |
5e3b5197 | 475 | size_t mic_len, hdrlen, rlen; |
6fc6879b | 476 | struct wpa_eapol_key *reply; |
5e3b5197 | 477 | u8 *rbuf, *key_mic; |
26e23750 | 478 | u8 *rsn_ie_buf = NULL; |
4a26ccda | 479 | u16 key_info; |
6fc6879b JM |
480 | |
481 | if (wpa_ie == NULL) { | |
f049052b BG |
482 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No wpa_ie set - " |
483 | "cannot generate msg 2/4"); | |
6fc6879b JM |
484 | return -1; |
485 | } | |
486 | ||
26e23750 JM |
487 | #ifdef CONFIG_IEEE80211R |
488 | if (wpa_key_mgmt_ft(sm->key_mgmt)) { | |
489 | int res; | |
490 | ||
84972999 JM |
491 | wpa_hexdump(MSG_DEBUG, "WPA: WPA IE before FT processing", |
492 | wpa_ie, wpa_ie_len); | |
55046414 JM |
493 | /* |
494 | * Add PMKR1Name into RSN IE (PMKID-List) and add MDIE and | |
495 | * FTIE from (Re)Association Response. | |
496 | */ | |
497 | rsn_ie_buf = os_malloc(wpa_ie_len + 2 + 2 + PMKID_LEN + | |
498 | sm->assoc_resp_ies_len); | |
26e23750 JM |
499 | if (rsn_ie_buf == NULL) |
500 | return -1; | |
501 | os_memcpy(rsn_ie_buf, wpa_ie, wpa_ie_len); | |
59e78c24 | 502 | res = wpa_insert_pmkid(rsn_ie_buf, &wpa_ie_len, |
26e23750 JM |
503 | sm->pmk_r1_name); |
504 | if (res < 0) { | |
505 | os_free(rsn_ie_buf); | |
506 | return -1; | |
507 | } | |
84972999 JM |
508 | wpa_hexdump(MSG_DEBUG, |
509 | "WPA: WPA IE after PMKID[PMKR1Name] addition into RSNE", | |
510 | rsn_ie_buf, wpa_ie_len); | |
55046414 JM |
511 | |
512 | if (sm->assoc_resp_ies) { | |
84972999 JM |
513 | wpa_hexdump(MSG_DEBUG, "WPA: Add assoc_resp_ies", |
514 | sm->assoc_resp_ies, | |
515 | sm->assoc_resp_ies_len); | |
55046414 JM |
516 | os_memcpy(rsn_ie_buf + wpa_ie_len, sm->assoc_resp_ies, |
517 | sm->assoc_resp_ies_len); | |
518 | wpa_ie_len += sm->assoc_resp_ies_len; | |
519 | } | |
26e23750 JM |
520 | |
521 | wpa_ie = rsn_ie_buf; | |
26e23750 JM |
522 | } |
523 | #endif /* CONFIG_IEEE80211R */ | |
524 | ||
6fc6879b JM |
525 | wpa_hexdump(MSG_DEBUG, "WPA: WPA IE for msg 2/4", wpa_ie, wpa_ie_len); |
526 | ||
567da5bb | 527 | mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len); |
6d014ffc | 528 | hdrlen = sizeof(*reply) + mic_len + 2; |
6fc6879b | 529 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, |
5e3b5197 | 530 | NULL, hdrlen + wpa_ie_len, |
6fc6879b | 531 | &rlen, (void *) &reply); |
26e23750 JM |
532 | if (rbuf == NULL) { |
533 | os_free(rsn_ie_buf); | |
6fc6879b | 534 | return -1; |
26e23750 | 535 | } |
6fc6879b | 536 | |
a14896e8 JM |
537 | reply->type = (sm->proto == WPA_PROTO_RSN || |
538 | sm->proto == WPA_PROTO_OSEN) ? | |
6fc6879b | 539 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; |
4a26ccda JM |
540 | key_info = ver | WPA_KEY_INFO_KEY_TYPE; |
541 | if (mic_len) | |
542 | key_info |= WPA_KEY_INFO_MIC; | |
2022f1d0 JM |
543 | else |
544 | key_info |= WPA_KEY_INFO_ENCR_KEY_DATA; | |
4a26ccda | 545 | WPA_PUT_BE16(reply->key_info, key_info); |
a14896e8 | 546 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) |
6fc6879b JM |
547 | WPA_PUT_BE16(reply->key_length, 0); |
548 | else | |
549 | os_memcpy(reply->key_length, key->key_length, 2); | |
550 | os_memcpy(reply->replay_counter, key->replay_counter, | |
551 | WPA_REPLAY_COUNTER_LEN); | |
bc8318ac JM |
552 | wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter", reply->replay_counter, |
553 | WPA_REPLAY_COUNTER_LEN); | |
6fc6879b | 554 | |
6d014ffc JM |
555 | key_mic = (u8 *) (reply + 1); |
556 | WPA_PUT_BE16(key_mic + mic_len, wpa_ie_len); /* Key Data Length */ | |
557 | os_memcpy(key_mic + mic_len + 2, wpa_ie, wpa_ie_len); /* Key Data */ | |
26e23750 | 558 | os_free(rsn_ie_buf); |
6fc6879b JM |
559 | |
560 | os_memcpy(reply->key_nonce, nonce, WPA_NONCE_LEN); | |
561 | ||
f049052b | 562 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/4"); |
1049af7e JM |
563 | return wpa_eapol_key_send(sm, ptk, ver, dst, ETH_P_EAPOL, rbuf, rlen, |
564 | key_mic); | |
6fc6879b JM |
565 | } |
566 | ||
567 | ||
568 | static int wpa_derive_ptk(struct wpa_sm *sm, const unsigned char *src_addr, | |
98cd3d1c | 569 | const struct wpa_eapol_key *key, struct wpa_ptk *ptk) |
6fc6879b | 570 | { |
10ec6a5f JM |
571 | const u8 *z = NULL; |
572 | size_t z_len = 0; | |
8b138d28 | 573 | int akmp; |
10ec6a5f | 574 | |
6fc6879b | 575 | #ifdef CONFIG_IEEE80211R |
56586197 | 576 | if (wpa_key_mgmt_ft(sm->key_mgmt)) |
98cd3d1c | 577 | return wpa_derive_ptk_ft(sm, src_addr, key, ptk); |
6fc6879b JM |
578 | #endif /* CONFIG_IEEE80211R */ |
579 | ||
10ec6a5f JM |
580 | #ifdef CONFIG_DPP2 |
581 | if (sm->key_mgmt == WPA_KEY_MGMT_DPP && sm->dpp_z) { | |
582 | z = wpabuf_head(sm->dpp_z); | |
583 | z_len = wpabuf_len(sm->dpp_z); | |
584 | } | |
585 | #endif /* CONFIG_DPP2 */ | |
586 | ||
8b138d28 JM |
587 | akmp = sm->key_mgmt; |
588 | #ifdef CONFIG_OWE | |
589 | if (sm->owe_ptk_workaround && akmp == WPA_KEY_MGMT_OWE && | |
590 | sm->pmk_len > 32) { | |
591 | wpa_printf(MSG_DEBUG, | |
592 | "OWE: Force SHA256 for PTK derivation"); | |
593 | akmp = WPA_KEY_MGMT_PSK_SHA256; | |
594 | } | |
595 | #endif /* CONFIG_OWE */ | |
98cd3d1c JM |
596 | return wpa_pmk_to_ptk(sm->pmk, sm->pmk_len, "Pairwise key expansion", |
597 | sm->own_addr, sm->bssid, sm->snonce, | |
8b138d28 | 598 | key->key_nonce, ptk, akmp, |
10ec6a5f | 599 | sm->pairwise_cipher, z, z_len); |
6fc6879b JM |
600 | } |
601 | ||
602 | ||
603 | static void wpa_supplicant_process_1_of_4(struct wpa_sm *sm, | |
604 | const unsigned char *src_addr, | |
605 | const struct wpa_eapol_key *key, | |
e6270129 JM |
606 | u16 ver, const u8 *key_data, |
607 | size_t key_data_len) | |
6fc6879b JM |
608 | { |
609 | struct wpa_eapol_ie_parse ie; | |
610 | struct wpa_ptk *ptk; | |
b4a1256d | 611 | int res; |
25ef8529 JM |
612 | u8 *kde, *kde_buf = NULL; |
613 | size_t kde_len; | |
6fc6879b JM |
614 | |
615 | if (wpa_sm_get_network_ctx(sm) == NULL) { | |
f049052b BG |
616 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No SSID info " |
617 | "found (msg 1 of 4)"); | |
6fc6879b JM |
618 | return; |
619 | } | |
620 | ||
621 | wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE); | |
f049052b BG |
622 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of 4-Way " |
623 | "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver); | |
6fc6879b JM |
624 | |
625 | os_memset(&ie, 0, sizeof(ie)); | |
626 | ||
a14896e8 | 627 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { |
6fc6879b | 628 | /* RSN: msg 1/4 should contain PMKID for the selected PMK */ |
e6270129 JM |
629 | wpa_hexdump(MSG_DEBUG, "RSN: msg 1/4 key data", |
630 | key_data, key_data_len); | |
631 | if (wpa_supplicant_parse_ies(key_data, key_data_len, &ie) < 0) | |
d627a939 | 632 | goto failed; |
6fc6879b JM |
633 | if (ie.pmkid) { |
634 | wpa_hexdump(MSG_DEBUG, "RSN: PMKID from " | |
635 | "Authenticator", ie.pmkid, PMKID_LEN); | |
636 | } | |
637 | } | |
6fc6879b | 638 | |
b4a1256d JM |
639 | res = wpa_supplicant_get_pmk(sm, src_addr, ie.pmkid); |
640 | if (res == -2) { | |
f049052b BG |
641 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: Do not reply to " |
642 | "msg 1/4 - requesting full EAP authentication"); | |
b4a1256d JM |
643 | return; |
644 | } | |
645 | if (res) | |
83935317 | 646 | goto failed; |
6fc6879b JM |
647 | |
648 | if (sm->renew_snonce) { | |
3642c431 | 649 | if (random_get_bytes(sm->snonce, WPA_NONCE_LEN)) { |
0f057fb2 | 650 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
6fc6879b | 651 | "WPA: Failed to get random data for SNonce"); |
83935317 | 652 | goto failed; |
6fc6879b JM |
653 | } |
654 | sm->renew_snonce = 0; | |
655 | wpa_hexdump(MSG_DEBUG, "WPA: Renewed SNonce", | |
656 | sm->snonce, WPA_NONCE_LEN); | |
657 | } | |
658 | ||
659 | /* Calculate PTK which will be stored as a temporary PTK until it has | |
660 | * been verified when processing message 3/4. */ | |
661 | ptk = &sm->tptk; | |
b488a129 JM |
662 | if (wpa_derive_ptk(sm, src_addr, key, ptk) < 0) |
663 | goto failed; | |
3b9c5176 | 664 | if (sm->pairwise_cipher == WPA_CIPHER_TKIP) { |
d2c33b91 | 665 | u8 buf[8]; |
3b9c5176 | 666 | /* Supplicant: swap tx/rx Mic keys */ |
98cd3d1c JM |
667 | os_memcpy(buf, &ptk->tk[16], 8); |
668 | os_memcpy(&ptk->tk[16], &ptk->tk[24], 8); | |
669 | os_memcpy(&ptk->tk[24], buf, 8); | |
31bc66e4 | 670 | forced_memzero(buf, sizeof(buf)); |
3b9c5176 | 671 | } |
6fc6879b JM |
672 | sm->tptk_set = 1; |
673 | ||
25ef8529 JM |
674 | kde = sm->assoc_wpa_ie; |
675 | kde_len = sm->assoc_wpa_ie_len; | |
6d6c8877 JM |
676 | kde_buf = os_malloc(kde_len + |
677 | 2 + RSN_SELECTOR_LEN + 3 + | |
678 | sm->assoc_rsnxe_len + | |
679 | 2 + RSN_SELECTOR_LEN + 1); | |
680 | if (!kde_buf) | |
681 | goto failed; | |
682 | os_memcpy(kde_buf, kde, kde_len); | |
683 | kde = kde_buf; | |
25ef8529 | 684 | |
17c2559c MV |
685 | #ifdef CONFIG_OCV |
686 | if (wpa_sm_ocv_enabled(sm)) { | |
687 | struct wpa_channel_info ci; | |
688 | u8 *pos; | |
689 | ||
6d6c8877 | 690 | pos = kde + kde_len; |
17c2559c MV |
691 | if (wpa_sm_channel_info(sm, &ci) != 0) { |
692 | wpa_printf(MSG_WARNING, | |
693 | "Failed to get channel info for OCI element in EAPOL-Key 2/4"); | |
694 | goto failed; | |
695 | } | |
696 | ||
17c2559c MV |
697 | if (ocv_insert_oci_kde(&ci, &pos) < 0) |
698 | goto failed; | |
699 | kde_len = pos - kde; | |
700 | } | |
701 | #endif /* CONFIG_OCV */ | |
702 | ||
6d6c8877 JM |
703 | if (sm->assoc_rsnxe && sm->assoc_rsnxe_len) { |
704 | os_memcpy(kde + kde_len, sm->assoc_rsnxe, sm->assoc_rsnxe_len); | |
705 | kde_len += sm->assoc_rsnxe_len; | |
706 | } | |
707 | ||
25ef8529 JM |
708 | #ifdef CONFIG_P2P |
709 | if (sm->p2p) { | |
6d6c8877 JM |
710 | u8 *pos; |
711 | ||
712 | wpa_printf(MSG_DEBUG, | |
713 | "P2P: Add IP Address Request KDE into EAPOL-Key 2/4"); | |
714 | pos = kde + kde_len; | |
715 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
716 | *pos++ = RSN_SELECTOR_LEN + 1; | |
717 | RSN_SELECTOR_PUT(pos, WFA_KEY_DATA_IP_ADDR_REQ); | |
718 | pos += RSN_SELECTOR_LEN; | |
719 | *pos++ = 0x01; | |
720 | kde_len = pos - kde; | |
25ef8529 JM |
721 | } |
722 | #endif /* CONFIG_P2P */ | |
723 | ||
6fc6879b | 724 | if (wpa_supplicant_send_2_of_4(sm, sm->bssid, key, ver, sm->snonce, |
c93b7e18 | 725 | kde, kde_len, ptk) < 0) |
83935317 | 726 | goto failed; |
6fc6879b | 727 | |
25ef8529 | 728 | os_free(kde_buf); |
6fc6879b | 729 | os_memcpy(sm->anonce, key->key_nonce, WPA_NONCE_LEN); |
83935317 JM |
730 | return; |
731 | ||
732 | failed: | |
25ef8529 | 733 | os_free(kde_buf); |
83935317 | 734 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); |
6fc6879b JM |
735 | } |
736 | ||
737 | ||
738 | static void wpa_sm_start_preauth(void *eloop_ctx, void *timeout_ctx) | |
739 | { | |
740 | struct wpa_sm *sm = eloop_ctx; | |
741 | rsn_preauth_candidate_process(sm); | |
742 | } | |
743 | ||
744 | ||
745 | static void wpa_supplicant_key_neg_complete(struct wpa_sm *sm, | |
746 | const u8 *addr, int secure) | |
747 | { | |
0f057fb2 JM |
748 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
749 | "WPA: Key negotiation completed with " | |
6fc6879b JM |
750 | MACSTR " [PTK=%s GTK=%s]", MAC2STR(addr), |
751 | wpa_cipher_txt(sm->pairwise_cipher), | |
752 | wpa_cipher_txt(sm->group_cipher)); | |
6fc6879b JM |
753 | wpa_sm_cancel_auth_timeout(sm); |
754 | wpa_sm_set_state(sm, WPA_COMPLETED); | |
755 | ||
756 | if (secure) { | |
757 | wpa_sm_mlme_setprotection( | |
758 | sm, addr, MLME_SETPROTECTION_PROTECT_TYPE_RX_TX, | |
759 | MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); | |
760 | eapol_sm_notify_portValid(sm->eapol, TRUE); | |
a1ea1b45 | 761 | if (wpa_key_mgmt_wpa_psk(sm->key_mgmt) || |
567da5bb | 762 | sm->key_mgmt == WPA_KEY_MGMT_DPP || |
a1ea1b45 | 763 | sm->key_mgmt == WPA_KEY_MGMT_OWE) |
6fc6879b JM |
764 | eapol_sm_notify_eap_success(sm->eapol, TRUE); |
765 | /* | |
766 | * Start preauthentication after a short wait to avoid a | |
767 | * possible race condition between the data receive and key | |
768 | * configuration after the 4-Way Handshake. This increases the | |
ffbf1eaa | 769 | * likelihood of the first preauth EAPOL-Start frame getting to |
6fc6879b JM |
770 | * the target AP. |
771 | */ | |
02a0a239 JM |
772 | if (!dl_list_empty(&sm->pmksa_candidates)) |
773 | eloop_register_timeout(1, 0, wpa_sm_start_preauth, | |
774 | sm, NULL); | |
6fc6879b JM |
775 | } |
776 | ||
777 | if (sm->cur_pmksa && sm->cur_pmksa->opportunistic) { | |
f049052b BG |
778 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
779 | "RSN: Authenticator accepted " | |
780 | "opportunistic PMKSA entry - marking it valid"); | |
6fc6879b JM |
781 | sm->cur_pmksa->opportunistic = 0; |
782 | } | |
783 | ||
784 | #ifdef CONFIG_IEEE80211R | |
56586197 | 785 | if (wpa_key_mgmt_ft(sm->key_mgmt)) { |
6fc6879b | 786 | /* Prepare for the next transition */ |
76b7981d | 787 | wpa_ft_prepare_auth_request(sm, NULL); |
6fc6879b JM |
788 | } |
789 | #endif /* CONFIG_IEEE80211R */ | |
790 | } | |
791 | ||
792 | ||
581a8cde JM |
793 | static void wpa_sm_rekey_ptk(void *eloop_ctx, void *timeout_ctx) |
794 | { | |
795 | struct wpa_sm *sm = eloop_ctx; | |
f049052b | 796 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Request PTK rekeying"); |
581a8cde JM |
797 | wpa_sm_key_request(sm, 0, 1); |
798 | } | |
799 | ||
800 | ||
6fc6879b | 801 | static int wpa_supplicant_install_ptk(struct wpa_sm *sm, |
a919a260 AW |
802 | const struct wpa_eapol_key *key, |
803 | enum key_flag key_flag) | |
6fc6879b JM |
804 | { |
805 | int keylen, rsclen; | |
71934751 | 806 | enum wpa_alg alg; |
6fc6879b | 807 | const u8 *key_rsc; |
6fc6879b | 808 | |
53bb18cc | 809 | if (sm->ptk.installed) { |
ad00d64e JM |
810 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
811 | "WPA: Do not re-install same PTK to the driver"); | |
812 | return 0; | |
813 | } | |
814 | ||
f049052b BG |
815 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
816 | "WPA: Installing PTK to the driver"); | |
6fc6879b | 817 | |
c3550295 | 818 | if (sm->pairwise_cipher == WPA_CIPHER_NONE) { |
f049052b BG |
819 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Pairwise Cipher " |
820 | "Suite: NONE - do not use pairwise keys"); | |
6fc6879b | 821 | return 0; |
c3550295 JM |
822 | } |
823 | ||
824 | if (!wpa_cipher_valid_pairwise(sm->pairwise_cipher)) { | |
f049052b BG |
825 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
826 | "WPA: Unsupported pairwise cipher %d", | |
827 | sm->pairwise_cipher); | |
6fc6879b JM |
828 | return -1; |
829 | } | |
830 | ||
c3550295 JM |
831 | alg = wpa_cipher_to_alg(sm->pairwise_cipher); |
832 | keylen = wpa_cipher_key_len(sm->pairwise_cipher); | |
a6ea6653 JM |
833 | if (keylen <= 0 || (unsigned int) keylen != sm->ptk.tk_len) { |
834 | wpa_printf(MSG_DEBUG, "WPA: TK length mismatch: %d != %lu", | |
835 | keylen, (long unsigned int) sm->ptk.tk_len); | |
836 | return -1; | |
837 | } | |
c3550295 JM |
838 | rsclen = wpa_cipher_rsc_len(sm->pairwise_cipher); |
839 | ||
a14896e8 | 840 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { |
6fc6879b JM |
841 | key_rsc = null_rsc; |
842 | } else { | |
843 | key_rsc = key->key_rsc; | |
844 | wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, rsclen); | |
845 | } | |
846 | ||
847 | if (wpa_sm_set_key(sm, alg, sm->bssid, 0, 1, key_rsc, rsclen, | |
a919a260 AW |
848 | sm->ptk.tk, keylen, |
849 | KEY_FLAG_PAIRWISE | key_flag) < 0) { | |
f049052b BG |
850 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
851 | "WPA: Failed to set PTK to the " | |
852 | "driver (alg=%d keylen=%d bssid=" MACSTR ")", | |
853 | alg, keylen, MAC2STR(sm->bssid)); | |
6fc6879b JM |
854 | return -1; |
855 | } | |
581a8cde | 856 | |
7d711541 | 857 | /* TK is not needed anymore in supplicant */ |
98cd3d1c | 858 | os_memset(sm->ptk.tk, 0, WPA_TK_MAX_LEN); |
a6ea6653 | 859 | sm->ptk.tk_len = 0; |
53bb18cc | 860 | sm->ptk.installed = 1; |
7d711541 | 861 | |
581a8cde JM |
862 | if (sm->wpa_ptk_rekey) { |
863 | eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); | |
864 | eloop_register_timeout(sm->wpa_ptk_rekey, 0, wpa_sm_rekey_ptk, | |
865 | sm, NULL); | |
866 | } | |
867 | ||
6fc6879b JM |
868 | return 0; |
869 | } | |
870 | ||
871 | ||
f049052b BG |
872 | static int wpa_supplicant_check_group_cipher(struct wpa_sm *sm, |
873 | int group_cipher, | |
6fc6879b | 874 | int keylen, int maxkeylen, |
71934751 JM |
875 | int *key_rsc_len, |
876 | enum wpa_alg *alg) | |
6fc6879b | 877 | { |
c3550295 | 878 | int klen; |
6fc6879b | 879 | |
c3550295 JM |
880 | *alg = wpa_cipher_to_alg(group_cipher); |
881 | if (*alg == WPA_ALG_NONE) { | |
f049052b BG |
882 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
883 | "WPA: Unsupported Group Cipher %d", | |
884 | group_cipher); | |
6fc6879b JM |
885 | return -1; |
886 | } | |
c3550295 | 887 | *key_rsc_len = wpa_cipher_rsc_len(group_cipher); |
6fc6879b | 888 | |
c3550295 JM |
889 | klen = wpa_cipher_key_len(group_cipher); |
890 | if (keylen != klen || maxkeylen < klen) { | |
f049052b BG |
891 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
892 | "WPA: Unsupported %s Group Cipher key length %d (%d)", | |
893 | wpa_cipher_txt(group_cipher), keylen, maxkeylen); | |
c3550295 | 894 | return -1; |
6fc6879b | 895 | } |
c3550295 | 896 | return 0; |
6fc6879b JM |
897 | } |
898 | ||
899 | ||
900 | struct wpa_gtk_data { | |
71934751 | 901 | enum wpa_alg alg; |
6fc6879b JM |
902 | int tx, key_rsc_len, keyidx; |
903 | u8 gtk[32]; | |
904 | int gtk_len; | |
905 | }; | |
906 | ||
907 | ||
908 | static int wpa_supplicant_install_gtk(struct wpa_sm *sm, | |
909 | const struct wpa_gtk_data *gd, | |
87e2db16 | 910 | const u8 *key_rsc, int wnm_sleep) |
6fc6879b JM |
911 | { |
912 | const u8 *_gtk = gd->gtk; | |
913 | u8 gtk_buf[32]; | |
914 | ||
cb5132bb | 915 | /* Detect possible key reinstallation */ |
87e2db16 JM |
916 | if ((sm->gtk.gtk_len == (size_t) gd->gtk_len && |
917 | os_memcmp(sm->gtk.gtk, gd->gtk, sm->gtk.gtk_len) == 0) || | |
918 | (sm->gtk_wnm_sleep.gtk_len == (size_t) gd->gtk_len && | |
919 | os_memcmp(sm->gtk_wnm_sleep.gtk, gd->gtk, | |
920 | sm->gtk_wnm_sleep.gtk_len) == 0)) { | |
cb5132bb MV |
921 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
922 | "WPA: Not reinstalling already in-use GTK to the driver (keyidx=%d tx=%d len=%d)", | |
923 | gd->keyidx, gd->tx, gd->gtk_len); | |
924 | return 0; | |
925 | } | |
926 | ||
6fc6879b | 927 | wpa_hexdump_key(MSG_DEBUG, "WPA: Group Key", gd->gtk, gd->gtk_len); |
f049052b BG |
928 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
929 | "WPA: Installing GTK to the driver (keyidx=%d tx=%d len=%d)", | |
930 | gd->keyidx, gd->tx, gd->gtk_len); | |
6fc6879b JM |
931 | wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, gd->key_rsc_len); |
932 | if (sm->group_cipher == WPA_CIPHER_TKIP) { | |
933 | /* Swap Tx/Rx keys for Michael MIC */ | |
934 | os_memcpy(gtk_buf, gd->gtk, 16); | |
935 | os_memcpy(gtk_buf + 16, gd->gtk + 24, 8); | |
936 | os_memcpy(gtk_buf + 24, gd->gtk + 16, 8); | |
937 | _gtk = gtk_buf; | |
938 | } | |
939 | if (sm->pairwise_cipher == WPA_CIPHER_NONE) { | |
0382097e | 940 | if (wpa_sm_set_key(sm, gd->alg, NULL, |
6fc6879b | 941 | gd->keyidx, 1, key_rsc, gd->key_rsc_len, |
a919a260 AW |
942 | _gtk, gd->gtk_len, |
943 | KEY_FLAG_GROUP_RX_TX_DEFAULT) < 0) { | |
f049052b BG |
944 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
945 | "WPA: Failed to set GTK to the driver " | |
946 | "(Group only)"); | |
31bc66e4 | 947 | forced_memzero(gtk_buf, sizeof(gtk_buf)); |
6fc6879b JM |
948 | return -1; |
949 | } | |
0382097e | 950 | } else if (wpa_sm_set_key(sm, gd->alg, broadcast_ether_addr, |
6fc6879b | 951 | gd->keyidx, gd->tx, key_rsc, gd->key_rsc_len, |
a919a260 | 952 | _gtk, gd->gtk_len, KEY_FLAG_GROUP_RX) < 0) { |
f049052b BG |
953 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
954 | "WPA: Failed to set GTK to " | |
955 | "the driver (alg=%d keylen=%d keyidx=%d)", | |
956 | gd->alg, gd->gtk_len, gd->keyidx); | |
31bc66e4 | 957 | forced_memzero(gtk_buf, sizeof(gtk_buf)); |
6fc6879b JM |
958 | return -1; |
959 | } | |
31bc66e4 | 960 | forced_memzero(gtk_buf, sizeof(gtk_buf)); |
6fc6879b | 961 | |
87e2db16 JM |
962 | if (wnm_sleep) { |
963 | sm->gtk_wnm_sleep.gtk_len = gd->gtk_len; | |
964 | os_memcpy(sm->gtk_wnm_sleep.gtk, gd->gtk, | |
965 | sm->gtk_wnm_sleep.gtk_len); | |
966 | } else { | |
967 | sm->gtk.gtk_len = gd->gtk_len; | |
968 | os_memcpy(sm->gtk.gtk, gd->gtk, sm->gtk.gtk_len); | |
969 | } | |
cb5132bb | 970 | |
6fc6879b JM |
971 | return 0; |
972 | } | |
973 | ||
974 | ||
975 | static int wpa_supplicant_gtk_tx_bit_workaround(const struct wpa_sm *sm, | |
976 | int tx) | |
977 | { | |
978 | if (tx && sm->pairwise_cipher != WPA_CIPHER_NONE) { | |
979 | /* Ignore Tx bit for GTK if a pairwise key is used. One AP | |
980 | * seemed to set this bit (incorrectly, since Tx is only when | |
981 | * doing Group Key only APs) and without this workaround, the | |
982 | * data connection does not work because wpa_supplicant | |
983 | * configured non-zero keyidx to be used for unicast. */ | |
f049052b BG |
984 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
985 | "WPA: Tx bit set for GTK, but pairwise " | |
986 | "keys are used - ignore Tx bit"); | |
6fc6879b JM |
987 | return 0; |
988 | } | |
989 | return tx; | |
990 | } | |
991 | ||
992 | ||
73ed03f3 MS |
993 | static int wpa_supplicant_rsc_relaxation(const struct wpa_sm *sm, |
994 | const u8 *rsc) | |
995 | { | |
996 | int rsclen; | |
997 | ||
998 | if (!sm->wpa_rsc_relaxation) | |
999 | return 0; | |
1000 | ||
1001 | rsclen = wpa_cipher_rsc_len(sm->group_cipher); | |
1002 | ||
1003 | /* | |
1004 | * Try to detect RSC (endian) corruption issue where the AP sends | |
1005 | * the RSC bytes in EAPOL-Key message in the wrong order, both if | |
1006 | * it's actually a 6-byte field (as it should be) and if it treats | |
1007 | * it as an 8-byte field. | |
1008 | * An AP model known to have this bug is the Sapido RB-1632. | |
1009 | */ | |
1010 | if (rsclen == 6 && ((rsc[5] && !rsc[0]) || rsc[6] || rsc[7])) { | |
1011 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, | |
1012 | "RSC %02x%02x%02x%02x%02x%02x%02x%02x is likely bogus, using 0", | |
1013 | rsc[0], rsc[1], rsc[2], rsc[3], | |
1014 | rsc[4], rsc[5], rsc[6], rsc[7]); | |
1015 | ||
1016 | return 1; | |
1017 | } | |
1018 | ||
1019 | return 0; | |
1020 | } | |
1021 | ||
1022 | ||
6fc6879b JM |
1023 | static int wpa_supplicant_pairwise_gtk(struct wpa_sm *sm, |
1024 | const struct wpa_eapol_key *key, | |
1025 | const u8 *gtk, size_t gtk_len, | |
1026 | int key_info) | |
1027 | { | |
6fc6879b | 1028 | struct wpa_gtk_data gd; |
73ed03f3 | 1029 | const u8 *key_rsc; |
6fc6879b JM |
1030 | |
1031 | /* | |
1032 | * IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames - Figure 43x | |
1033 | * GTK KDE format: | |
1034 | * KeyID[bits 0-1], Tx [bit 2], Reserved [bits 3-7] | |
1035 | * Reserved [bits 0-7] | |
1036 | * GTK | |
1037 | */ | |
1038 | ||
1039 | os_memset(&gd, 0, sizeof(gd)); | |
1040 | wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in pairwise handshake", | |
1041 | gtk, gtk_len); | |
1042 | ||
1043 | if (gtk_len < 2 || gtk_len - 2 > sizeof(gd.gtk)) | |
1044 | return -1; | |
1045 | ||
1046 | gd.keyidx = gtk[0] & 0x3; | |
1047 | gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm, | |
1048 | !!(gtk[0] & BIT(2))); | |
1049 | gtk += 2; | |
1050 | gtk_len -= 2; | |
1051 | ||
1052 | os_memcpy(gd.gtk, gtk, gtk_len); | |
1053 | gd.gtk_len = gtk_len; | |
1054 | ||
73ed03f3 MS |
1055 | key_rsc = key->key_rsc; |
1056 | if (wpa_supplicant_rsc_relaxation(sm, key->key_rsc)) | |
1057 | key_rsc = null_rsc; | |
1058 | ||
dff1e285 JM |
1059 | if (sm->group_cipher != WPA_CIPHER_GTK_NOT_USED && |
1060 | (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, | |
1061 | gtk_len, gtk_len, | |
1062 | &gd.key_rsc_len, &gd.alg) || | |
87e2db16 | 1063 | wpa_supplicant_install_gtk(sm, &gd, key_rsc, 0))) { |
f049052b BG |
1064 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1065 | "RSN: Failed to install GTK"); | |
31bc66e4 | 1066 | forced_memzero(&gd, sizeof(gd)); |
6fc6879b JM |
1067 | return -1; |
1068 | } | |
31bc66e4 | 1069 | forced_memzero(&gd, sizeof(gd)); |
6fc6879b | 1070 | |
6fc6879b | 1071 | return 0; |
6fc6879b JM |
1072 | } |
1073 | ||
1074 | ||
cb5132bb | 1075 | static int wpa_supplicant_install_igtk(struct wpa_sm *sm, |
87e2db16 JM |
1076 | const struct wpa_igtk_kde *igtk, |
1077 | int wnm_sleep) | |
cb5132bb MV |
1078 | { |
1079 | size_t len = wpa_cipher_key_len(sm->mgmt_group_cipher); | |
1080 | u16 keyidx = WPA_GET_LE16(igtk->keyid); | |
1081 | ||
1082 | /* Detect possible key reinstallation */ | |
87e2db16 JM |
1083 | if ((sm->igtk.igtk_len == len && |
1084 | os_memcmp(sm->igtk.igtk, igtk->igtk, sm->igtk.igtk_len) == 0) || | |
1085 | (sm->igtk_wnm_sleep.igtk_len == len && | |
1086 | os_memcmp(sm->igtk_wnm_sleep.igtk, igtk->igtk, | |
1087 | sm->igtk_wnm_sleep.igtk_len) == 0)) { | |
cb5132bb MV |
1088 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1089 | "WPA: Not reinstalling already in-use IGTK to the driver (keyidx=%d)", | |
1090 | keyidx); | |
1091 | return 0; | |
1092 | } | |
1093 | ||
1094 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
94919da2 | 1095 | "WPA: IGTK keyid %d pn " COMPACT_MACSTR, |
cb5132bb MV |
1096 | keyidx, MAC2STR(igtk->pn)); |
1097 | wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK", igtk->igtk, len); | |
1098 | if (keyidx > 4095) { | |
1099 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, | |
1100 | "WPA: Invalid IGTK KeyID %d", keyidx); | |
1101 | return -1; | |
1102 | } | |
1103 | if (wpa_sm_set_key(sm, wpa_cipher_to_alg(sm->mgmt_group_cipher), | |
1104 | broadcast_ether_addr, | |
1105 | keyidx, 0, igtk->pn, sizeof(igtk->pn), | |
a919a260 | 1106 | igtk->igtk, len, KEY_FLAG_GROUP_RX) < 0) { |
824cb5a5 JM |
1107 | if (keyidx == 0x0400 || keyidx == 0x0500) { |
1108 | /* Assume the AP has broken PMF implementation since it | |
1109 | * seems to have swapped the KeyID bytes. The AP cannot | |
1110 | * be trusted to implement BIP correctly or provide a | |
1111 | * valid IGTK, so do not try to configure this key with | |
1112 | * swapped KeyID bytes. Instead, continue without | |
1113 | * configuring the IGTK so that the driver can drop any | |
1114 | * received group-addressed robust management frames due | |
1115 | * to missing keys. | |
1116 | * | |
1117 | * Normally, this error behavior would result in us | |
1118 | * disconnecting, but there are number of deployed APs | |
1119 | * with this broken behavior, so as an interoperability | |
1120 | * workaround, allow the connection to proceed. */ | |
1121 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, | |
1122 | "WPA: Ignore IGTK configuration error due to invalid IGTK KeyID byte order"); | |
1123 | } else { | |
1124 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, | |
1125 | "WPA: Failed to configure IGTK to the driver"); | |
1126 | return -1; | |
1127 | } | |
cb5132bb MV |
1128 | } |
1129 | ||
87e2db16 JM |
1130 | if (wnm_sleep) { |
1131 | sm->igtk_wnm_sleep.igtk_len = len; | |
1132 | os_memcpy(sm->igtk_wnm_sleep.igtk, igtk->igtk, | |
1133 | sm->igtk_wnm_sleep.igtk_len); | |
1134 | } else { | |
1135 | sm->igtk.igtk_len = len; | |
1136 | os_memcpy(sm->igtk.igtk, igtk->igtk, sm->igtk.igtk_len); | |
1137 | } | |
cb5132bb MV |
1138 | |
1139 | return 0; | |
1140 | } | |
cb5132bb MV |
1141 | |
1142 | ||
6fc6879b JM |
1143 | static int ieee80211w_set_keys(struct wpa_sm *sm, |
1144 | struct wpa_eapol_ie_parse *ie) | |
1145 | { | |
8dd9f9cd | 1146 | if (!wpa_cipher_valid_mgmt_group(sm->mgmt_group_cipher)) |
6fc6879b JM |
1147 | return 0; |
1148 | ||
1149 | if (ie->igtk) { | |
8dd9f9cd | 1150 | size_t len; |
6fc6879b | 1151 | const struct wpa_igtk_kde *igtk; |
cb5132bb | 1152 | |
8dd9f9cd JM |
1153 | len = wpa_cipher_key_len(sm->mgmt_group_cipher); |
1154 | if (ie->igtk_len != WPA_IGTK_KDE_PREFIX_LEN + len) | |
6fc6879b | 1155 | return -1; |
cb5132bb | 1156 | |
6fc6879b | 1157 | igtk = (const struct wpa_igtk_kde *) ie->igtk; |
87e2db16 | 1158 | if (wpa_supplicant_install_igtk(sm, igtk, 0) < 0) |
6fc6879b | 1159 | return -1; |
6fc6879b JM |
1160 | } |
1161 | ||
1162 | return 0; | |
6fc6879b JM |
1163 | } |
1164 | ||
1165 | ||
1166 | static void wpa_report_ie_mismatch(struct wpa_sm *sm, | |
1167 | const char *reason, const u8 *src_addr, | |
1168 | const u8 *wpa_ie, size_t wpa_ie_len, | |
1169 | const u8 *rsn_ie, size_t rsn_ie_len) | |
1170 | { | |
0f057fb2 | 1171 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: %s (src=" MACSTR ")", |
6fc6879b JM |
1172 | reason, MAC2STR(src_addr)); |
1173 | ||
1174 | if (sm->ap_wpa_ie) { | |
1175 | wpa_hexdump(MSG_INFO, "WPA: WPA IE in Beacon/ProbeResp", | |
1176 | sm->ap_wpa_ie, sm->ap_wpa_ie_len); | |
1177 | } | |
1178 | if (wpa_ie) { | |
1179 | if (!sm->ap_wpa_ie) { | |
f049052b BG |
1180 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1181 | "WPA: No WPA IE in Beacon/ProbeResp"); | |
6fc6879b JM |
1182 | } |
1183 | wpa_hexdump(MSG_INFO, "WPA: WPA IE in 3/4 msg", | |
1184 | wpa_ie, wpa_ie_len); | |
1185 | } | |
1186 | ||
1187 | if (sm->ap_rsn_ie) { | |
1188 | wpa_hexdump(MSG_INFO, "WPA: RSN IE in Beacon/ProbeResp", | |
1189 | sm->ap_rsn_ie, sm->ap_rsn_ie_len); | |
1190 | } | |
1191 | if (rsn_ie) { | |
1192 | if (!sm->ap_rsn_ie) { | |
f049052b BG |
1193 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1194 | "WPA: No RSN IE in Beacon/ProbeResp"); | |
6fc6879b JM |
1195 | } |
1196 | wpa_hexdump(MSG_INFO, "WPA: RSN IE in 3/4 msg", | |
1197 | rsn_ie, rsn_ie_len); | |
1198 | } | |
1199 | ||
3da372fa | 1200 | wpa_sm_deauthenticate(sm, WLAN_REASON_IE_IN_4WAY_DIFFERS); |
6fc6879b JM |
1201 | } |
1202 | ||
1203 | ||
5af8187e JM |
1204 | #ifdef CONFIG_IEEE80211R |
1205 | ||
1206 | static int ft_validate_mdie(struct wpa_sm *sm, | |
1207 | const unsigned char *src_addr, | |
3b4f6dac JM |
1208 | struct wpa_eapol_ie_parse *ie, |
1209 | const u8 *assoc_resp_mdie) | |
5af8187e JM |
1210 | { |
1211 | struct rsn_mdie *mdie; | |
1212 | ||
5af8187e JM |
1213 | mdie = (struct rsn_mdie *) (ie->mdie + 2); |
1214 | if (ie->mdie == NULL || ie->mdie_len < 2 + sizeof(*mdie) || | |
1215 | os_memcmp(mdie->mobility_domain, sm->mobility_domain, | |
1216 | MOBILITY_DOMAIN_ID_LEN) != 0) { | |
f049052b BG |
1217 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE in msg 3/4 did " |
1218 | "not match with the current mobility domain"); | |
5af8187e JM |
1219 | return -1; |
1220 | } | |
1221 | ||
3b4f6dac JM |
1222 | if (assoc_resp_mdie && |
1223 | (assoc_resp_mdie[1] != ie->mdie[1] || | |
1224 | os_memcmp(assoc_resp_mdie, ie->mdie, 2 + ie->mdie[1]) != 0)) { | |
f049052b | 1225 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE mismatch"); |
3b4f6dac JM |
1226 | wpa_hexdump(MSG_DEBUG, "FT: MDIE in EAPOL-Key msg 3/4", |
1227 | ie->mdie, 2 + ie->mdie[1]); | |
1228 | wpa_hexdump(MSG_DEBUG, "FT: MDIE in (Re)Association Response", | |
1229 | assoc_resp_mdie, 2 + assoc_resp_mdie[1]); | |
1230 | return -1; | |
1231 | } | |
1232 | ||
1233 | return 0; | |
1234 | } | |
1235 | ||
1236 | ||
1237 | static int ft_validate_ftie(struct wpa_sm *sm, | |
1238 | const unsigned char *src_addr, | |
1239 | struct wpa_eapol_ie_parse *ie, | |
1240 | const u8 *assoc_resp_ftie) | |
1241 | { | |
1242 | if (ie->ftie == NULL) { | |
f049052b BG |
1243 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1244 | "FT: No FTIE in EAPOL-Key msg 3/4"); | |
3b4f6dac JM |
1245 | return -1; |
1246 | } | |
1247 | ||
1248 | if (assoc_resp_ftie == NULL) | |
1249 | return 0; | |
1250 | ||
1251 | if (assoc_resp_ftie[1] != ie->ftie[1] || | |
1252 | os_memcmp(assoc_resp_ftie, ie->ftie, 2 + ie->ftie[1]) != 0) { | |
f049052b | 1253 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: FTIE mismatch"); |
3b4f6dac JM |
1254 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 3/4", |
1255 | ie->ftie, 2 + ie->ftie[1]); | |
1256 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)Association Response", | |
1257 | assoc_resp_ftie, 2 + assoc_resp_ftie[1]); | |
1258 | return -1; | |
1259 | } | |
1260 | ||
5af8187e JM |
1261 | return 0; |
1262 | } | |
1263 | ||
1264 | ||
1265 | static int ft_validate_rsnie(struct wpa_sm *sm, | |
1266 | const unsigned char *src_addr, | |
1267 | struct wpa_eapol_ie_parse *ie) | |
1268 | { | |
1269 | struct wpa_ie_data rsn; | |
1270 | ||
1271 | if (!ie->rsn_ie) | |
1272 | return 0; | |
1273 | ||
1274 | /* | |
1275 | * Verify that PMKR1Name from EAPOL-Key message 3/4 | |
1276 | * matches with the value we derived. | |
1277 | */ | |
1278 | if (wpa_parse_wpa_ie_rsn(ie->rsn_ie, ie->rsn_ie_len, &rsn) < 0 || | |
1279 | rsn.num_pmkid != 1 || rsn.pmkid == NULL) { | |
f049052b BG |
1280 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: No PMKR1Name in " |
1281 | "FT 4-way handshake message 3/4"); | |
5af8187e JM |
1282 | return -1; |
1283 | } | |
1284 | ||
0d15b69f JM |
1285 | if (os_memcmp_const(rsn.pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0) |
1286 | { | |
f049052b BG |
1287 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1288 | "FT: PMKR1Name mismatch in " | |
1289 | "FT 4-way handshake message 3/4"); | |
5af8187e JM |
1290 | wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Authenticator", |
1291 | rsn.pmkid, WPA_PMK_NAME_LEN); | |
1292 | wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name", | |
1293 | sm->pmk_r1_name, WPA_PMK_NAME_LEN); | |
1294 | return -1; | |
1295 | } | |
1296 | ||
1297 | return 0; | |
1298 | } | |
1299 | ||
1300 | ||
1301 | static int wpa_supplicant_validate_ie_ft(struct wpa_sm *sm, | |
1302 | const unsigned char *src_addr, | |
1303 | struct wpa_eapol_ie_parse *ie) | |
1304 | { | |
3b4f6dac JM |
1305 | const u8 *pos, *end, *mdie = NULL, *ftie = NULL; |
1306 | ||
1307 | if (sm->assoc_resp_ies) { | |
1308 | pos = sm->assoc_resp_ies; | |
1309 | end = pos + sm->assoc_resp_ies_len; | |
2461724c JM |
1310 | while (end - pos > 2) { |
1311 | if (2 + pos[1] > end - pos) | |
3b4f6dac JM |
1312 | break; |
1313 | switch (*pos) { | |
1314 | case WLAN_EID_MOBILITY_DOMAIN: | |
1315 | mdie = pos; | |
1316 | break; | |
1317 | case WLAN_EID_FAST_BSS_TRANSITION: | |
1318 | ftie = pos; | |
1319 | break; | |
1320 | } | |
1321 | pos += 2 + pos[1]; | |
1322 | } | |
1323 | } | |
1324 | ||
1325 | if (ft_validate_mdie(sm, src_addr, ie, mdie) < 0 || | |
1326 | ft_validate_ftie(sm, src_addr, ie, ftie) < 0 || | |
5af8187e JM |
1327 | ft_validate_rsnie(sm, src_addr, ie) < 0) |
1328 | return -1; | |
1329 | ||
1330 | return 0; | |
1331 | } | |
1332 | ||
1333 | #endif /* CONFIG_IEEE80211R */ | |
1334 | ||
1335 | ||
6fc6879b JM |
1336 | static int wpa_supplicant_validate_ie(struct wpa_sm *sm, |
1337 | const unsigned char *src_addr, | |
1338 | struct wpa_eapol_ie_parse *ie) | |
1339 | { | |
1340 | if (sm->ap_wpa_ie == NULL && sm->ap_rsn_ie == NULL) { | |
f049052b BG |
1341 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
1342 | "WPA: No WPA/RSN IE for this AP known. " | |
1343 | "Trying to get from scan results"); | |
6fc6879b | 1344 | if (wpa_sm_get_beacon_ie(sm) < 0) { |
f049052b BG |
1345 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1346 | "WPA: Could not find AP from " | |
1347 | "the scan results"); | |
6fc6879b | 1348 | } else { |
f049052b BG |
1349 | wpa_msg(sm->ctx->msg_ctx, MSG_DEBUG, |
1350 | "WPA: Found the current AP from " | |
1351 | "updated scan results"); | |
6fc6879b JM |
1352 | } |
1353 | } | |
1354 | ||
1355 | if (ie->wpa_ie == NULL && ie->rsn_ie == NULL && | |
1356 | (sm->ap_wpa_ie || sm->ap_rsn_ie)) { | |
1357 | wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " | |
1358 | "with IE in Beacon/ProbeResp (no IE?)", | |
1359 | src_addr, ie->wpa_ie, ie->wpa_ie_len, | |
1360 | ie->rsn_ie, ie->rsn_ie_len); | |
1361 | return -1; | |
1362 | } | |
1363 | ||
1364 | if ((ie->wpa_ie && sm->ap_wpa_ie && | |
1365 | (ie->wpa_ie_len != sm->ap_wpa_ie_len || | |
1366 | os_memcmp(ie->wpa_ie, sm->ap_wpa_ie, ie->wpa_ie_len) != 0)) || | |
1367 | (ie->rsn_ie && sm->ap_rsn_ie && | |
26e23750 JM |
1368 | wpa_compare_rsn_ie(wpa_key_mgmt_ft(sm->key_mgmt), |
1369 | sm->ap_rsn_ie, sm->ap_rsn_ie_len, | |
1370 | ie->rsn_ie, ie->rsn_ie_len))) { | |
6fc6879b JM |
1371 | wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " |
1372 | "with IE in Beacon/ProbeResp", | |
1373 | src_addr, ie->wpa_ie, ie->wpa_ie_len, | |
1374 | ie->rsn_ie, ie->rsn_ie_len); | |
1375 | return -1; | |
1376 | } | |
1377 | ||
1378 | if (sm->proto == WPA_PROTO_WPA && | |
1379 | ie->rsn_ie && sm->ap_rsn_ie == NULL && sm->rsn_enabled) { | |
1380 | wpa_report_ie_mismatch(sm, "Possible downgrade attack " | |
1381 | "detected - RSN was enabled and RSN IE " | |
1382 | "was in msg 3/4, but not in " | |
1383 | "Beacon/ProbeResp", | |
1384 | src_addr, ie->wpa_ie, ie->wpa_ie_len, | |
1385 | ie->rsn_ie, ie->rsn_ie_len); | |
1386 | return -1; | |
1387 | } | |
1388 | ||
146889e3 JM |
1389 | if ((sm->ap_rsnxe && !ie->rsnxe) || |
1390 | (!sm->ap_rsnxe && ie->rsnxe) || | |
1391 | (sm->ap_rsnxe && ie->rsnxe && | |
1392 | (sm->ap_rsnxe_len != ie->rsnxe_len || | |
1393 | os_memcmp(sm->ap_rsnxe, ie->rsnxe, sm->ap_rsnxe_len) != 0))) { | |
1394 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, | |
1395 | "WPA: RSNXE mismatch between Beacon/ProbeResp and EAPOL-Key msg 3/4"); | |
1396 | return -1; | |
1397 | } | |
1398 | ||
6fc6879b | 1399 | #ifdef CONFIG_IEEE80211R |
5af8187e JM |
1400 | if (wpa_key_mgmt_ft(sm->key_mgmt) && |
1401 | wpa_supplicant_validate_ie_ft(sm, src_addr, ie) < 0) | |
1402 | return -1; | |
6fc6879b JM |
1403 | #endif /* CONFIG_IEEE80211R */ |
1404 | ||
1405 | return 0; | |
1406 | } | |
1407 | ||
1408 | ||
1409 | /** | |
1410 | * wpa_supplicant_send_4_of_4 - Send message 4 of WPA/RSN 4-Way Handshake | |
1411 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
1412 | * @dst: Destination address for the frame | |
1413 | * @key: Pointer to the EAPOL-Key frame header | |
1414 | * @ver: Version bits from EAPOL-Key Key Info | |
1415 | * @key_info: Key Info | |
6fc6879b | 1416 | * @ptk: PTK to use for keyed hash and encryption |
c93b7e18 | 1417 | * Returns: >= 0 on success, < 0 on failure |
6fc6879b JM |
1418 | */ |
1419 | int wpa_supplicant_send_4_of_4(struct wpa_sm *sm, const unsigned char *dst, | |
1420 | const struct wpa_eapol_key *key, | |
1421 | u16 ver, u16 key_info, | |
6fc6879b JM |
1422 | struct wpa_ptk *ptk) |
1423 | { | |
5e3b5197 | 1424 | size_t mic_len, hdrlen, rlen; |
6fc6879b | 1425 | struct wpa_eapol_key *reply; |
5e3b5197 | 1426 | u8 *rbuf, *key_mic; |
6fc6879b | 1427 | |
567da5bb | 1428 | mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len); |
6d014ffc | 1429 | hdrlen = sizeof(*reply) + mic_len + 2; |
6fc6879b | 1430 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, |
5e3b5197 | 1431 | hdrlen, &rlen, (void *) &reply); |
6fc6879b JM |
1432 | if (rbuf == NULL) |
1433 | return -1; | |
1434 | ||
a14896e8 JM |
1435 | reply->type = (sm->proto == WPA_PROTO_RSN || |
1436 | sm->proto == WPA_PROTO_OSEN) ? | |
6fc6879b JM |
1437 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; |
1438 | key_info &= WPA_KEY_INFO_SECURE; | |
4a26ccda JM |
1439 | key_info |= ver | WPA_KEY_INFO_KEY_TYPE; |
1440 | if (mic_len) | |
1441 | key_info |= WPA_KEY_INFO_MIC; | |
2022f1d0 JM |
1442 | else |
1443 | key_info |= WPA_KEY_INFO_ENCR_KEY_DATA; | |
6fc6879b | 1444 | WPA_PUT_BE16(reply->key_info, key_info); |
a14896e8 | 1445 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) |
6fc6879b JM |
1446 | WPA_PUT_BE16(reply->key_length, 0); |
1447 | else | |
1448 | os_memcpy(reply->key_length, key->key_length, 2); | |
1449 | os_memcpy(reply->replay_counter, key->replay_counter, | |
1450 | WPA_REPLAY_COUNTER_LEN); | |
1451 | ||
6d014ffc JM |
1452 | key_mic = (u8 *) (reply + 1); |
1453 | WPA_PUT_BE16(key_mic + mic_len, 0); | |
6fc6879b | 1454 | |
f049052b | 1455 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 4/4"); |
1049af7e JM |
1456 | return wpa_eapol_key_send(sm, ptk, ver, dst, ETH_P_EAPOL, rbuf, rlen, |
1457 | key_mic); | |
6fc6879b JM |
1458 | } |
1459 | ||
1460 | ||
1461 | static void wpa_supplicant_process_3_of_4(struct wpa_sm *sm, | |
1462 | const struct wpa_eapol_key *key, | |
e6270129 JM |
1463 | u16 ver, const u8 *key_data, |
1464 | size_t key_data_len) | |
6fc6879b | 1465 | { |
e6270129 | 1466 | u16 key_info, keylen; |
6fc6879b JM |
1467 | struct wpa_eapol_ie_parse ie; |
1468 | ||
1469 | wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE); | |
f049052b BG |
1470 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 3 of 4-Way " |
1471 | "Handshake from " MACSTR " (ver=%d)", MAC2STR(sm->bssid), ver); | |
6fc6879b JM |
1472 | |
1473 | key_info = WPA_GET_BE16(key->key_info); | |
1474 | ||
e6270129 JM |
1475 | wpa_hexdump(MSG_DEBUG, "WPA: IE KeyData", key_data, key_data_len); |
1476 | if (wpa_supplicant_parse_ies(key_data, key_data_len, &ie) < 0) | |
d627a939 | 1477 | goto failed; |
6fc6879b | 1478 | if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { |
f049052b BG |
1479 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1480 | "WPA: GTK IE in unencrypted key data"); | |
83935317 | 1481 | goto failed; |
6fc6879b | 1482 | } |
6fc6879b | 1483 | if (ie.igtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { |
f049052b BG |
1484 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1485 | "WPA: IGTK KDE in unencrypted key data"); | |
83935317 | 1486 | goto failed; |
6fc6879b JM |
1487 | } |
1488 | ||
8dd9f9cd JM |
1489 | if (ie.igtk && |
1490 | wpa_cipher_valid_mgmt_group(sm->mgmt_group_cipher) && | |
1491 | ie.igtk_len != WPA_IGTK_KDE_PREFIX_LEN + | |
1492 | (unsigned int) wpa_cipher_key_len(sm->mgmt_group_cipher)) { | |
f049052b BG |
1493 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1494 | "WPA: Invalid IGTK KDE length %lu", | |
1495 | (unsigned long) ie.igtk_len); | |
83935317 | 1496 | goto failed; |
6fc6879b | 1497 | } |
6fc6879b JM |
1498 | |
1499 | if (wpa_supplicant_validate_ie(sm, sm->bssid, &ie) < 0) | |
83935317 | 1500 | goto failed; |
6fc6879b JM |
1501 | |
1502 | if (os_memcmp(sm->anonce, key->key_nonce, WPA_NONCE_LEN) != 0) { | |
f049052b BG |
1503 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1504 | "WPA: ANonce from message 1 of 4-Way Handshake " | |
1505 | "differs from 3 of 4-Way Handshake - drop packet (src=" | |
1506 | MACSTR ")", MAC2STR(sm->bssid)); | |
83935317 | 1507 | goto failed; |
6fc6879b JM |
1508 | } |
1509 | ||
1510 | keylen = WPA_GET_BE16(key->key_length); | |
c3550295 JM |
1511 | if (keylen != wpa_cipher_key_len(sm->pairwise_cipher)) { |
1512 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, | |
1513 | "WPA: Invalid %s key length %d (src=" MACSTR | |
1514 | ")", wpa_cipher_txt(sm->pairwise_cipher), keylen, | |
1515 | MAC2STR(sm->bssid)); | |
1516 | goto failed; | |
6fc6879b JM |
1517 | } |
1518 | ||
25ef8529 JM |
1519 | #ifdef CONFIG_P2P |
1520 | if (ie.ip_addr_alloc) { | |
1521 | os_memcpy(sm->p2p_ip_addr, ie.ip_addr_alloc, 3 * 4); | |
1522 | wpa_hexdump(MSG_DEBUG, "P2P: IP address info", | |
1523 | sm->p2p_ip_addr, sizeof(sm->p2p_ip_addr)); | |
1524 | } | |
1525 | #endif /* CONFIG_P2P */ | |
1526 | ||
aed61c4e MV |
1527 | #ifdef CONFIG_OCV |
1528 | if (wpa_sm_ocv_enabled(sm)) { | |
1529 | struct wpa_channel_info ci; | |
1530 | ||
1531 | if (wpa_sm_channel_info(sm, &ci) != 0) { | |
1532 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, | |
1533 | "Failed to get channel info to validate received OCI in EAPOL-Key 3/4"); | |
1534 | return; | |
1535 | } | |
1536 | ||
1537 | if (ocv_verify_tx_params(ie.oci, ie.oci_len, &ci, | |
1538 | channel_width_to_int(ci.chanwidth), | |
1539 | ci.seg1_idx) != 0) { | |
1540 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "%s", | |
1541 | ocv_errorstr); | |
1542 | return; | |
1543 | } | |
1544 | } | |
1545 | #endif /* CONFIG_OCV */ | |
1546 | ||
6fc6879b | 1547 | if (wpa_supplicant_send_4_of_4(sm, sm->bssid, key, ver, key_info, |
c93b7e18 | 1548 | &sm->ptk) < 0) { |
83935317 JM |
1549 | goto failed; |
1550 | } | |
6fc6879b JM |
1551 | |
1552 | /* SNonce was successfully used in msg 3/4, so mark it to be renewed | |
1553 | * for the next 4-Way Handshake. If msg 3 is received again, the old | |
1554 | * SNonce will still be used to avoid changing PTK. */ | |
1555 | sm->renew_snonce = 1; | |
1556 | ||
1557 | if (key_info & WPA_KEY_INFO_INSTALL) { | |
a919a260 | 1558 | if (wpa_supplicant_install_ptk(sm, key, KEY_FLAG_RX_TX)) |
83935317 | 1559 | goto failed; |
6fc6879b JM |
1560 | } |
1561 | ||
1562 | if (key_info & WPA_KEY_INFO_SECURE) { | |
1563 | wpa_sm_mlme_setprotection( | |
1564 | sm, sm->bssid, MLME_SETPROTECTION_PROTECT_TYPE_RX, | |
1565 | MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); | |
1566 | eapol_sm_notify_portValid(sm->eapol, TRUE); | |
1567 | } | |
1568 | wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); | |
1569 | ||
dff1e285 | 1570 | if (sm->group_cipher == WPA_CIPHER_GTK_NOT_USED) { |
dfdabd91 JM |
1571 | /* No GTK to be set to the driver */ |
1572 | } else if (!ie.gtk && sm->proto == WPA_PROTO_RSN) { | |
1573 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, | |
1574 | "RSN: No GTK KDE included in EAPOL-Key msg 3/4"); | |
1575 | goto failed; | |
dff1e285 | 1576 | } else if (ie.gtk && |
6fc6879b JM |
1577 | wpa_supplicant_pairwise_gtk(sm, key, |
1578 | ie.gtk, ie.gtk_len, key_info) < 0) { | |
f049052b BG |
1579 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1580 | "RSN: Failed to configure GTK"); | |
83935317 | 1581 | goto failed; |
6fc6879b JM |
1582 | } |
1583 | ||
83935317 | 1584 | if (ieee80211w_set_keys(sm, &ie) < 0) { |
f049052b BG |
1585 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1586 | "RSN: Failed to configure IGTK"); | |
83935317 JM |
1587 | goto failed; |
1588 | } | |
1589 | ||
dfdabd91 JM |
1590 | if (sm->group_cipher == WPA_CIPHER_GTK_NOT_USED || ie.gtk) |
1591 | wpa_supplicant_key_neg_complete(sm, sm->bssid, | |
1592 | key_info & WPA_KEY_INFO_SECURE); | |
1593 | ||
392e68e8 SD |
1594 | if (ie.gtk) |
1595 | wpa_sm_set_rekey_offload(sm); | |
b14a210c | 1596 | |
17d4b774 JM |
1597 | /* Add PMKSA cache entry for Suite B AKMs here since PMKID can be |
1598 | * calculated only after KCK has been derived. Though, do not replace an | |
1599 | * existing PMKSA entry after each 4-way handshake (i.e., new KCK/PMKID) | |
1600 | * to avoid unnecessary changes of PMKID while continuing to use the | |
1601 | * same PMK. */ | |
1602 | if (sm->proto == WPA_PROTO_RSN && wpa_key_mgmt_suite_b(sm->key_mgmt) && | |
1603 | !sm->cur_pmksa) { | |
087a1f4e JM |
1604 | struct rsn_pmksa_cache_entry *sa; |
1605 | ||
70c93963 | 1606 | sa = pmksa_cache_add(sm->pmksa, sm->pmk, sm->pmk_len, NULL, |
98cd3d1c | 1607 | sm->ptk.kck, sm->ptk.kck_len, |
087a1f4e | 1608 | sm->bssid, sm->own_addr, |
869af307 | 1609 | sm->network_ctx, sm->key_mgmt, NULL); |
087a1f4e JM |
1610 | if (!sm->cur_pmksa) |
1611 | sm->cur_pmksa = sa; | |
1612 | } | |
1613 | ||
761396e4 | 1614 | sm->msg_3_of_4_ok = 1; |
83935317 JM |
1615 | return; |
1616 | ||
1617 | failed: | |
1618 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); | |
6fc6879b JM |
1619 | } |
1620 | ||
1621 | ||
1622 | static int wpa_supplicant_process_1_of_2_rsn(struct wpa_sm *sm, | |
1623 | const u8 *keydata, | |
1624 | size_t keydatalen, | |
1625 | u16 key_info, | |
1626 | struct wpa_gtk_data *gd) | |
1627 | { | |
1628 | int maxkeylen; | |
1629 | struct wpa_eapol_ie_parse ie; | |
1630 | ||
ecbdc1a1 JM |
1631 | wpa_hexdump_key(MSG_DEBUG, "RSN: msg 1/2 key data", |
1632 | keydata, keydatalen); | |
d627a939 JM |
1633 | if (wpa_supplicant_parse_ies(keydata, keydatalen, &ie) < 0) |
1634 | return -1; | |
6fc6879b | 1635 | if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { |
f049052b BG |
1636 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1637 | "WPA: GTK IE in unencrypted key data"); | |
6fc6879b JM |
1638 | return -1; |
1639 | } | |
1640 | if (ie.gtk == NULL) { | |
f049052b BG |
1641 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1642 | "WPA: No GTK IE in Group Key msg 1/2"); | |
6fc6879b JM |
1643 | return -1; |
1644 | } | |
1645 | maxkeylen = gd->gtk_len = ie.gtk_len - 2; | |
1646 | ||
aed61c4e MV |
1647 | #ifdef CONFIG_OCV |
1648 | if (wpa_sm_ocv_enabled(sm)) { | |
1649 | struct wpa_channel_info ci; | |
1650 | ||
1651 | if (wpa_sm_channel_info(sm, &ci) != 0) { | |
1652 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, | |
1653 | "Failed to get channel info to validate received OCI in EAPOL-Key group msg 1/2"); | |
1654 | return -1; | |
1655 | } | |
1656 | ||
1657 | if (ocv_verify_tx_params(ie.oci, ie.oci_len, &ci, | |
1658 | channel_width_to_int(ci.chanwidth), | |
1659 | ci.seg1_idx) != 0) { | |
1660 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "%s", | |
1661 | ocv_errorstr); | |
1662 | return -1; | |
1663 | } | |
1664 | } | |
1665 | #endif /* CONFIG_OCV */ | |
1666 | ||
f049052b | 1667 | if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, |
6fc6879b JM |
1668 | gd->gtk_len, maxkeylen, |
1669 | &gd->key_rsc_len, &gd->alg)) | |
1670 | return -1; | |
1671 | ||
7cb9bb4d JM |
1672 | wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in group key handshake", |
1673 | ie.gtk, ie.gtk_len); | |
6fc6879b JM |
1674 | gd->keyidx = ie.gtk[0] & 0x3; |
1675 | gd->tx = wpa_supplicant_gtk_tx_bit_workaround(sm, | |
1676 | !!(ie.gtk[0] & BIT(2))); | |
1677 | if (ie.gtk_len - 2 > sizeof(gd->gtk)) { | |
f049052b BG |
1678 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1679 | "RSN: Too long GTK in GTK IE (len=%lu)", | |
1680 | (unsigned long) ie.gtk_len - 2); | |
6fc6879b JM |
1681 | return -1; |
1682 | } | |
1683 | os_memcpy(gd->gtk, ie.gtk + 2, ie.gtk_len - 2); | |
1684 | ||
1685 | if (ieee80211w_set_keys(sm, &ie) < 0) | |
f049052b BG |
1686 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1687 | "RSN: Failed to configure IGTK"); | |
6fc6879b JM |
1688 | |
1689 | return 0; | |
1690 | } | |
1691 | ||
1692 | ||
1693 | static int wpa_supplicant_process_1_of_2_wpa(struct wpa_sm *sm, | |
1694 | const struct wpa_eapol_key *key, | |
e6270129 JM |
1695 | const u8 *key_data, |
1696 | size_t key_data_len, u16 key_info, | |
1697 | u16 ver, struct wpa_gtk_data *gd) | |
6fc6879b JM |
1698 | { |
1699 | size_t maxkeylen; | |
c397eff8 | 1700 | u16 gtk_len; |
6fc6879b | 1701 | |
c397eff8 | 1702 | gtk_len = WPA_GET_BE16(key->key_length); |
e6270129 | 1703 | maxkeylen = key_data_len; |
6fc6879b JM |
1704 | if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { |
1705 | if (maxkeylen < 8) { | |
f049052b BG |
1706 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1707 | "WPA: Too short maxkeylen (%lu)", | |
1708 | (unsigned long) maxkeylen); | |
6fc6879b JM |
1709 | return -1; |
1710 | } | |
1711 | maxkeylen -= 8; | |
1712 | } | |
1713 | ||
c397eff8 JM |
1714 | if (gtk_len > maxkeylen || |
1715 | wpa_supplicant_check_group_cipher(sm, sm->group_cipher, | |
1716 | gtk_len, maxkeylen, | |
6fc6879b JM |
1717 | &gd->key_rsc_len, &gd->alg)) |
1718 | return -1; | |
1719 | ||
c397eff8 | 1720 | gd->gtk_len = gtk_len; |
6fc6879b JM |
1721 | gd->keyidx = (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> |
1722 | WPA_KEY_INFO_KEY_INDEX_SHIFT; | |
98cd3d1c | 1723 | if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && sm->ptk.kek_len == 16) { |
7cb53ded JM |
1724 | #ifdef CONFIG_NO_RC4 |
1725 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, | |
1726 | "WPA: RC4 not supported in the build"); | |
1727 | return -1; | |
1728 | #else /* CONFIG_NO_RC4 */ | |
d2c33b91 | 1729 | u8 ek[32]; |
e6270129 | 1730 | if (key_data_len > sizeof(gd->gtk)) { |
f049052b BG |
1731 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1732 | "WPA: RC4 key data too long (%lu)", | |
e6270129 | 1733 | (unsigned long) key_data_len); |
6fc6879b JM |
1734 | return -1; |
1735 | } | |
d2c33b91 | 1736 | os_memcpy(ek, key->key_iv, 16); |
98cd3d1c | 1737 | os_memcpy(ek + 16, sm->ptk.kek, sm->ptk.kek_len); |
e6270129 JM |
1738 | os_memcpy(gd->gtk, key_data, key_data_len); |
1739 | if (rc4_skip(ek, 32, 256, gd->gtk, key_data_len)) { | |
31bc66e4 | 1740 | forced_memzero(ek, sizeof(ek)); |
f049052b BG |
1741 | wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, |
1742 | "WPA: RC4 failed"); | |
7a215dfc JM |
1743 | return -1; |
1744 | } | |
31bc66e4 | 1745 | forced_memzero(ek, sizeof(ek)); |
7cb53ded | 1746 | #endif /* CONFIG_NO_RC4 */ |
6fc6879b | 1747 | } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { |
e6270129 | 1748 | if (maxkeylen % 8) { |
f049052b BG |
1749 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1750 | "WPA: Unsupported AES-WRAP len %lu", | |
e6270129 | 1751 | (unsigned long) maxkeylen); |
6fc6879b JM |
1752 | return -1; |
1753 | } | |
1754 | if (maxkeylen > sizeof(gd->gtk)) { | |
f049052b BG |
1755 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1756 | "WPA: AES-WRAP key data " | |
1757 | "too long (keydatalen=%lu maxkeylen=%lu)", | |
e6270129 | 1758 | (unsigned long) key_data_len, |
f049052b | 1759 | (unsigned long) maxkeylen); |
6fc6879b JM |
1760 | return -1; |
1761 | } | |
98cd3d1c JM |
1762 | if (aes_unwrap(sm->ptk.kek, sm->ptk.kek_len, maxkeylen / 8, |
1763 | key_data, gd->gtk)) { | |
f049052b BG |
1764 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1765 | "WPA: AES unwrap failed - could not decrypt " | |
1766 | "GTK"); | |
6fc6879b JM |
1767 | return -1; |
1768 | } | |
1769 | } else { | |
f049052b BG |
1770 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1771 | "WPA: Unsupported key_info type %d", ver); | |
6fc6879b JM |
1772 | return -1; |
1773 | } | |
1774 | gd->tx = wpa_supplicant_gtk_tx_bit_workaround( | |
1775 | sm, !!(key_info & WPA_KEY_INFO_TXRX)); | |
1776 | return 0; | |
1777 | } | |
1778 | ||
1779 | ||
1780 | static int wpa_supplicant_send_2_of_2(struct wpa_sm *sm, | |
1781 | const struct wpa_eapol_key *key, | |
1782 | int ver, u16 key_info) | |
1783 | { | |
5e3b5197 | 1784 | size_t mic_len, hdrlen, rlen; |
6fc6879b | 1785 | struct wpa_eapol_key *reply; |
5e3b5197 | 1786 | u8 *rbuf, *key_mic; |
17c2559c MV |
1787 | size_t kde_len = 0; |
1788 | ||
1789 | #ifdef CONFIG_OCV | |
1790 | if (wpa_sm_ocv_enabled(sm)) | |
1791 | kde_len = OCV_OCI_KDE_LEN; | |
1792 | #endif /* CONFIG_OCV */ | |
6fc6879b | 1793 | |
567da5bb | 1794 | mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len); |
6d014ffc | 1795 | hdrlen = sizeof(*reply) + mic_len + 2; |
6fc6879b | 1796 | rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, |
17c2559c | 1797 | hdrlen + kde_len, &rlen, (void *) &reply); |
6fc6879b JM |
1798 | if (rbuf == NULL) |
1799 | return -1; | |
1800 | ||
a14896e8 JM |
1801 | reply->type = (sm->proto == WPA_PROTO_RSN || |
1802 | sm->proto == WPA_PROTO_OSEN) ? | |
6fc6879b JM |
1803 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; |
1804 | key_info &= WPA_KEY_INFO_KEY_INDEX_MASK; | |
4a26ccda JM |
1805 | key_info |= ver | WPA_KEY_INFO_SECURE; |
1806 | if (mic_len) | |
1807 | key_info |= WPA_KEY_INFO_MIC; | |
b44d1efd VK |
1808 | else |
1809 | key_info |= WPA_KEY_INFO_ENCR_KEY_DATA; | |
6fc6879b | 1810 | WPA_PUT_BE16(reply->key_info, key_info); |
a14896e8 | 1811 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) |
6fc6879b JM |
1812 | WPA_PUT_BE16(reply->key_length, 0); |
1813 | else | |
1814 | os_memcpy(reply->key_length, key->key_length, 2); | |
1815 | os_memcpy(reply->replay_counter, key->replay_counter, | |
1816 | WPA_REPLAY_COUNTER_LEN); | |
1817 | ||
6d014ffc | 1818 | key_mic = (u8 *) (reply + 1); |
17c2559c MV |
1819 | WPA_PUT_BE16(key_mic + mic_len, kde_len); /* Key Data Length */ |
1820 | ||
1821 | #ifdef CONFIG_OCV | |
1822 | if (wpa_sm_ocv_enabled(sm)) { | |
1823 | struct wpa_channel_info ci; | |
1824 | u8 *pos; | |
1825 | ||
1826 | if (wpa_sm_channel_info(sm, &ci) != 0) { | |
1827 | wpa_printf(MSG_WARNING, | |
1828 | "Failed to get channel info for OCI element in EAPOL-Key 2/2"); | |
1829 | os_free(rbuf); | |
1830 | return -1; | |
1831 | } | |
1832 | ||
1833 | pos = key_mic + mic_len + 2; /* Key Data */ | |
1834 | if (ocv_insert_oci_kde(&ci, &pos) < 0) { | |
1835 | os_free(rbuf); | |
1836 | return -1; | |
1837 | } | |
1838 | } | |
1839 | #endif /* CONFIG_OCV */ | |
6fc6879b | 1840 | |
f049052b | 1841 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/2"); |
1049af7e JM |
1842 | return wpa_eapol_key_send(sm, &sm->ptk, ver, sm->bssid, ETH_P_EAPOL, |
1843 | rbuf, rlen, key_mic); | |
6fc6879b JM |
1844 | } |
1845 | ||
1846 | ||
1847 | static void wpa_supplicant_process_1_of_2(struct wpa_sm *sm, | |
1848 | const unsigned char *src_addr, | |
1849 | const struct wpa_eapol_key *key, | |
e6270129 JM |
1850 | const u8 *key_data, |
1851 | size_t key_data_len, u16 ver) | |
6fc6879b | 1852 | { |
e6270129 | 1853 | u16 key_info; |
6fc6879b JM |
1854 | int rekey, ret; |
1855 | struct wpa_gtk_data gd; | |
73ed03f3 | 1856 | const u8 *key_rsc; |
6fc6879b | 1857 | |
04243740 | 1858 | if (!sm->msg_3_of_4_ok && !wpa_fils_is_completed(sm)) { |
761396e4 JM |
1859 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
1860 | "WPA: Group Key Handshake started prior to completion of 4-way handshake"); | |
1861 | goto failed; | |
1862 | } | |
1863 | ||
6fc6879b JM |
1864 | os_memset(&gd, 0, sizeof(gd)); |
1865 | ||
1866 | rekey = wpa_sm_get_state(sm) == WPA_COMPLETED; | |
f049052b BG |
1867 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of Group Key " |
1868 | "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver); | |
6fc6879b JM |
1869 | |
1870 | key_info = WPA_GET_BE16(key->key_info); | |
6fc6879b | 1871 | |
a14896e8 | 1872 | if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { |
e6270129 JM |
1873 | ret = wpa_supplicant_process_1_of_2_rsn(sm, key_data, |
1874 | key_data_len, key_info, | |
6fc6879b JM |
1875 | &gd); |
1876 | } else { | |
e6270129 JM |
1877 | ret = wpa_supplicant_process_1_of_2_wpa(sm, key, key_data, |
1878 | key_data_len, | |
1879 | key_info, ver, &gd); | |
6fc6879b JM |
1880 | } |
1881 | ||
1882 | wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); | |
1883 | ||
1884 | if (ret) | |
83935317 | 1885 | goto failed; |
6fc6879b | 1886 | |
73ed03f3 MS |
1887 | key_rsc = key->key_rsc; |
1888 | if (wpa_supplicant_rsc_relaxation(sm, key->key_rsc)) | |
1889 | key_rsc = null_rsc; | |
1890 | ||
87e2db16 | 1891 | if (wpa_supplicant_install_gtk(sm, &gd, key_rsc, 0) || |
c93b7e18 | 1892 | wpa_supplicant_send_2_of_2(sm, key, ver, key_info) < 0) |
83935317 | 1893 | goto failed; |
31bc66e4 | 1894 | forced_memzero(&gd, sizeof(gd)); |
6fc6879b JM |
1895 | |
1896 | if (rekey) { | |
0f057fb2 | 1897 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Group rekeying " |
6fc6879b JM |
1898 | "completed with " MACSTR " [GTK=%s]", |
1899 | MAC2STR(sm->bssid), wpa_cipher_txt(sm->group_cipher)); | |
1900 | wpa_sm_cancel_auth_timeout(sm); | |
1901 | wpa_sm_set_state(sm, WPA_COMPLETED); | |
1902 | } else { | |
1903 | wpa_supplicant_key_neg_complete(sm, sm->bssid, | |
1904 | key_info & | |
1905 | WPA_KEY_INFO_SECURE); | |
1906 | } | |
392e68e8 SD |
1907 | |
1908 | wpa_sm_set_rekey_offload(sm); | |
1909 | ||
83935317 JM |
1910 | return; |
1911 | ||
1912 | failed: | |
31bc66e4 | 1913 | forced_memzero(&gd, sizeof(gd)); |
83935317 | 1914 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); |
6fc6879b JM |
1915 | } |
1916 | ||
1917 | ||
1918 | static int wpa_supplicant_verify_eapol_key_mic(struct wpa_sm *sm, | |
6d014ffc | 1919 | struct wpa_eapol_key *key, |
6fc6879b JM |
1920 | u16 ver, |
1921 | const u8 *buf, size_t len) | |
1922 | { | |
98cd3d1c | 1923 | u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN]; |
6fc6879b | 1924 | int ok = 0; |
567da5bb | 1925 | size_t mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len); |
6fc6879b | 1926 | |
6d014ffc | 1927 | os_memcpy(mic, key + 1, mic_len); |
6fc6879b | 1928 | if (sm->tptk_set) { |
6d014ffc | 1929 | os_memset(key + 1, 0, mic_len); |
a6ea6653 JM |
1930 | if (wpa_eapol_key_mic(sm->tptk.kck, sm->tptk.kck_len, |
1931 | sm->key_mgmt, | |
1932 | ver, buf, len, (u8 *) (key + 1)) < 0 || | |
1933 | os_memcmp_const(mic, key + 1, mic_len) != 0) { | |
f049052b BG |
1934 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1935 | "WPA: Invalid EAPOL-Key MIC " | |
1936 | "when using TPTK - ignoring TPTK"); | |
525923b1 JM |
1937 | #ifdef TEST_FUZZ |
1938 | wpa_printf(MSG_INFO, | |
1939 | "TEST: Ignore Key MIC failure for fuzz testing"); | |
1940 | goto continue_fuzz; | |
1941 | #endif /* TEST_FUZZ */ | |
6fc6879b | 1942 | } else { |
525923b1 JM |
1943 | #ifdef TEST_FUZZ |
1944 | continue_fuzz: | |
1945 | #endif /* TEST_FUZZ */ | |
6fc6879b JM |
1946 | ok = 1; |
1947 | sm->tptk_set = 0; | |
1948 | sm->ptk_set = 1; | |
1949 | os_memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk)); | |
d2c33b91 | 1950 | os_memset(&sm->tptk, 0, sizeof(sm->tptk)); |
a00e946c MV |
1951 | /* |
1952 | * This assures the same TPTK in sm->tptk can never be | |
a68e0d86 | 1953 | * copied twice to sm->ptk as the new PTK. In |
a00e946c MV |
1954 | * combination with the installed flag in the wpa_ptk |
1955 | * struct, this assures the same PTK is only installed | |
1956 | * once. | |
1957 | */ | |
1958 | sm->renew_snonce = 1; | |
6fc6879b JM |
1959 | } |
1960 | } | |
1961 | ||
1962 | if (!ok && sm->ptk_set) { | |
6d014ffc | 1963 | os_memset(key + 1, 0, mic_len); |
a6ea6653 JM |
1964 | if (wpa_eapol_key_mic(sm->ptk.kck, sm->ptk.kck_len, |
1965 | sm->key_mgmt, | |
1966 | ver, buf, len, (u8 *) (key + 1)) < 0 || | |
1967 | os_memcmp_const(mic, key + 1, mic_len) != 0) { | |
f049052b BG |
1968 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1969 | "WPA: Invalid EAPOL-Key MIC - " | |
1970 | "dropping packet"); | |
525923b1 JM |
1971 | #ifdef TEST_FUZZ |
1972 | wpa_printf(MSG_INFO, | |
1973 | "TEST: Ignore Key MIC failure for fuzz testing"); | |
1974 | goto continue_fuzz2; | |
1975 | #endif /* TEST_FUZZ */ | |
6fc6879b JM |
1976 | return -1; |
1977 | } | |
525923b1 JM |
1978 | #ifdef TEST_FUZZ |
1979 | continue_fuzz2: | |
1980 | #endif /* TEST_FUZZ */ | |
6fc6879b JM |
1981 | ok = 1; |
1982 | } | |
1983 | ||
1984 | if (!ok) { | |
f049052b BG |
1985 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
1986 | "WPA: Could not verify EAPOL-Key MIC - " | |
1987 | "dropping packet"); | |
6fc6879b JM |
1988 | return -1; |
1989 | } | |
1990 | ||
1991 | os_memcpy(sm->rx_replay_counter, key->replay_counter, | |
1992 | WPA_REPLAY_COUNTER_LEN); | |
1993 | sm->rx_replay_counter_set = 1; | |
1994 | return 0; | |
1995 | } | |
1996 | ||
1997 | ||
1998 | /* Decrypt RSN EAPOL-Key key data (RC4 or AES-WRAP) */ | |
1999 | static int wpa_supplicant_decrypt_key_data(struct wpa_sm *sm, | |
6d014ffc JM |
2000 | struct wpa_eapol_key *key, |
2001 | size_t mic_len, u16 ver, | |
e6270129 | 2002 | u8 *key_data, size_t *key_data_len) |
6fc6879b | 2003 | { |
6fc6879b | 2004 | wpa_hexdump(MSG_DEBUG, "RSN: encrypted key data", |
e6270129 | 2005 | key_data, *key_data_len); |
6fc6879b | 2006 | if (!sm->ptk_set) { |
f049052b BG |
2007 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
2008 | "WPA: PTK not available, cannot decrypt EAPOL-Key Key " | |
2009 | "Data"); | |
6fc6879b JM |
2010 | return -1; |
2011 | } | |
2012 | ||
2013 | /* Decrypt key data here so that this operation does not need | |
2014 | * to be implemented separately for each message type. */ | |
98cd3d1c | 2015 | if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && sm->ptk.kek_len == 16) { |
7cb53ded JM |
2016 | #ifdef CONFIG_NO_RC4 |
2017 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, | |
2018 | "WPA: RC4 not supported in the build"); | |
2019 | return -1; | |
2020 | #else /* CONFIG_NO_RC4 */ | |
6fc6879b | 2021 | u8 ek[32]; |
ef9627cb JM |
2022 | |
2023 | wpa_printf(MSG_DEBUG, "WPA: Decrypt Key Data using RC4"); | |
6fc6879b | 2024 | os_memcpy(ek, key->key_iv, 16); |
98cd3d1c | 2025 | os_memcpy(ek + 16, sm->ptk.kek, sm->ptk.kek_len); |
e6270129 | 2026 | if (rc4_skip(ek, 32, 256, key_data, *key_data_len)) { |
31bc66e4 | 2027 | forced_memzero(ek, sizeof(ek)); |
f049052b BG |
2028 | wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, |
2029 | "WPA: RC4 failed"); | |
7a215dfc JM |
2030 | return -1; |
2031 | } | |
31bc66e4 | 2032 | forced_memzero(ek, sizeof(ek)); |
7cb53ded | 2033 | #endif /* CONFIG_NO_RC4 */ |
6fc6879b | 2034 | } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || |
df0f01d9 | 2035 | ver == WPA_KEY_INFO_TYPE_AES_128_CMAC || |
4bc801ab | 2036 | wpa_use_aes_key_wrap(sm->key_mgmt)) { |
6fc6879b | 2037 | u8 *buf; |
ef9627cb JM |
2038 | |
2039 | wpa_printf(MSG_DEBUG, | |
2040 | "WPA: Decrypt Key Data using AES-UNWRAP (KEK length %u)", | |
2041 | (unsigned int) sm->ptk.kek_len); | |
e6270129 | 2042 | if (*key_data_len < 8 || *key_data_len % 8) { |
f049052b | 2043 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
e6270129 JM |
2044 | "WPA: Unsupported AES-WRAP len %u", |
2045 | (unsigned int) *key_data_len); | |
6fc6879b JM |
2046 | return -1; |
2047 | } | |
e6270129 JM |
2048 | *key_data_len -= 8; /* AES-WRAP adds 8 bytes */ |
2049 | buf = os_malloc(*key_data_len); | |
6fc6879b | 2050 | if (buf == NULL) { |
f049052b BG |
2051 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
2052 | "WPA: No memory for AES-UNWRAP buffer"); | |
6fc6879b JM |
2053 | return -1; |
2054 | } | |
525923b1 JM |
2055 | #ifdef TEST_FUZZ |
2056 | os_memset(buf, 0x11, *key_data_len); | |
2057 | #endif /* TEST_FUZZ */ | |
98cd3d1c | 2058 | if (aes_unwrap(sm->ptk.kek, sm->ptk.kek_len, *key_data_len / 8, |
e6270129 | 2059 | key_data, buf)) { |
525923b1 JM |
2060 | #ifdef TEST_FUZZ |
2061 | wpa_printf(MSG_INFO, | |
2062 | "TEST: Ignore AES unwrap failure for fuzz testing"); | |
2063 | goto continue_fuzz; | |
2064 | #endif /* TEST_FUZZ */ | |
cd5895e8 | 2065 | bin_clear_free(buf, *key_data_len); |
f049052b BG |
2066 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
2067 | "WPA: AES unwrap failed - " | |
2068 | "could not decrypt EAPOL-Key key data"); | |
6fc6879b JM |
2069 | return -1; |
2070 | } | |
525923b1 JM |
2071 | #ifdef TEST_FUZZ |
2072 | continue_fuzz: | |
2073 | #endif /* TEST_FUZZ */ | |
e6270129 | 2074 | os_memcpy(key_data, buf, *key_data_len); |
cd5895e8 | 2075 | bin_clear_free(buf, *key_data_len); |
6d014ffc | 2076 | WPA_PUT_BE16(((u8 *) (key + 1)) + mic_len, *key_data_len); |
6fc6879b | 2077 | } else { |
f049052b BG |
2078 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
2079 | "WPA: Unsupported key_info type %d", ver); | |
6fc6879b JM |
2080 | return -1; |
2081 | } | |
2082 | wpa_hexdump_key(MSG_DEBUG, "WPA: decrypted EAPOL-Key key data", | |
e6270129 | 2083 | key_data, *key_data_len); |
6fc6879b JM |
2084 | return 0; |
2085 | } | |
2086 | ||
2087 | ||
2088 | /** | |
2089 | * wpa_sm_aborted_cached - Notify WPA that PMKSA caching was aborted | |
2090 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2091 | */ | |
2092 | void wpa_sm_aborted_cached(struct wpa_sm *sm) | |
2093 | { | |
2094 | if (sm && sm->cur_pmksa) { | |
f049052b BG |
2095 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2096 | "RSN: Cancelling PMKSA caching attempt"); | |
6fc6879b JM |
2097 | sm->cur_pmksa = NULL; |
2098 | } | |
2099 | } | |
2100 | ||
2101 | ||
f049052b | 2102 | static void wpa_eapol_key_dump(struct wpa_sm *sm, |
5e3b5197 JM |
2103 | const struct wpa_eapol_key *key, |
2104 | unsigned int key_data_len, | |
2105 | const u8 *mic, unsigned int mic_len) | |
6fc6879b JM |
2106 | { |
2107 | #ifndef CONFIG_NO_STDOUT_DEBUG | |
2108 | u16 key_info = WPA_GET_BE16(key->key_info); | |
2109 | ||
f049052b BG |
2110 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, " EAPOL-Key type=%d", key->type); |
2111 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
2112 | " key_info 0x%x (ver=%d keyidx=%d rsvd=%d %s%s%s%s%s%s%s%s)", | |
2113 | key_info, key_info & WPA_KEY_INFO_TYPE_MASK, | |
2114 | (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> | |
2115 | WPA_KEY_INFO_KEY_INDEX_SHIFT, | |
2116 | (key_info & (BIT(13) | BIT(14) | BIT(15))) >> 13, | |
2117 | key_info & WPA_KEY_INFO_KEY_TYPE ? "Pairwise" : "Group", | |
2118 | key_info & WPA_KEY_INFO_INSTALL ? " Install" : "", | |
2119 | key_info & WPA_KEY_INFO_ACK ? " Ack" : "", | |
2120 | key_info & WPA_KEY_INFO_MIC ? " MIC" : "", | |
2121 | key_info & WPA_KEY_INFO_SECURE ? " Secure" : "", | |
2122 | key_info & WPA_KEY_INFO_ERROR ? " Error" : "", | |
2123 | key_info & WPA_KEY_INFO_REQUEST ? " Request" : "", | |
2124 | key_info & WPA_KEY_INFO_ENCR_KEY_DATA ? " Encr" : ""); | |
2125 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
2126 | " key_length=%u key_data_length=%u", | |
5e3b5197 | 2127 | WPA_GET_BE16(key->key_length), key_data_len); |
6fc6879b JM |
2128 | wpa_hexdump(MSG_DEBUG, " replay_counter", |
2129 | key->replay_counter, WPA_REPLAY_COUNTER_LEN); | |
2130 | wpa_hexdump(MSG_DEBUG, " key_nonce", key->key_nonce, WPA_NONCE_LEN); | |
2131 | wpa_hexdump(MSG_DEBUG, " key_iv", key->key_iv, 16); | |
2132 | wpa_hexdump(MSG_DEBUG, " key_rsc", key->key_rsc, 8); | |
2133 | wpa_hexdump(MSG_DEBUG, " key_id (reserved)", key->key_id, 8); | |
5e3b5197 | 2134 | wpa_hexdump(MSG_DEBUG, " key_mic", mic, mic_len); |
6fc6879b JM |
2135 | #endif /* CONFIG_NO_STDOUT_DEBUG */ |
2136 | } | |
2137 | ||
2138 | ||
0ab1dd01 JM |
2139 | #ifdef CONFIG_FILS |
2140 | static int wpa_supp_aead_decrypt(struct wpa_sm *sm, u8 *buf, size_t buf_len, | |
2141 | size_t *key_data_len) | |
2142 | { | |
2143 | struct wpa_ptk *ptk; | |
2144 | struct ieee802_1x_hdr *hdr; | |
2145 | struct wpa_eapol_key *key; | |
2146 | u8 *pos, *tmp; | |
2147 | const u8 *aad[1]; | |
2148 | size_t aad_len[1]; | |
2149 | ||
2150 | if (*key_data_len < AES_BLOCK_SIZE) { | |
2151 | wpa_printf(MSG_INFO, "No room for AES-SIV data in the frame"); | |
2152 | return -1; | |
2153 | } | |
2154 | ||
2155 | if (sm->tptk_set) | |
2156 | ptk = &sm->tptk; | |
2157 | else if (sm->ptk_set) | |
2158 | ptk = &sm->ptk; | |
2159 | else | |
2160 | return -1; | |
2161 | ||
2162 | hdr = (struct ieee802_1x_hdr *) buf; | |
2163 | key = (struct wpa_eapol_key *) (hdr + 1); | |
2164 | pos = (u8 *) (key + 1); | |
2165 | pos += 2; /* Pointing at the Encrypted Key Data field */ | |
2166 | ||
2167 | tmp = os_malloc(*key_data_len); | |
2168 | if (!tmp) | |
2169 | return -1; | |
2170 | ||
2171 | /* AES-SIV AAD from EAPOL protocol version field (inclusive) to | |
2172 | * to Key Data (exclusive). */ | |
2173 | aad[0] = buf; | |
2174 | aad_len[0] = pos - buf; | |
2175 | if (aes_siv_decrypt(ptk->kek, ptk->kek_len, pos, *key_data_len, | |
2176 | 1, aad, aad_len, tmp) < 0) { | |
2177 | wpa_printf(MSG_INFO, "Invalid AES-SIV data in the frame"); | |
2178 | bin_clear_free(tmp, *key_data_len); | |
2179 | return -1; | |
2180 | } | |
2181 | ||
2182 | /* AEAD decryption and validation completed successfully */ | |
2183 | (*key_data_len) -= AES_BLOCK_SIZE; | |
2184 | wpa_hexdump_key(MSG_DEBUG, "WPA: Decrypted Key Data", | |
2185 | tmp, *key_data_len); | |
2186 | ||
2187 | /* Replace Key Data field with the decrypted version */ | |
2188 | os_memcpy(pos, tmp, *key_data_len); | |
2189 | pos -= 2; /* Key Data Length field */ | |
2190 | WPA_PUT_BE16(pos, *key_data_len); | |
2191 | bin_clear_free(tmp, *key_data_len); | |
2192 | ||
2193 | if (sm->tptk_set) { | |
2194 | sm->tptk_set = 0; | |
2195 | sm->ptk_set = 1; | |
2196 | os_memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk)); | |
2197 | os_memset(&sm->tptk, 0, sizeof(sm->tptk)); | |
2198 | } | |
2199 | ||
2200 | os_memcpy(sm->rx_replay_counter, key->replay_counter, | |
2201 | WPA_REPLAY_COUNTER_LEN); | |
2202 | sm->rx_replay_counter_set = 1; | |
2203 | ||
2204 | return 0; | |
2205 | } | |
2206 | #endif /* CONFIG_FILS */ | |
2207 | ||
2208 | ||
6fc6879b JM |
2209 | /** |
2210 | * wpa_sm_rx_eapol - Process received WPA EAPOL frames | |
2211 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2212 | * @src_addr: Source MAC address of the EAPOL packet | |
2213 | * @buf: Pointer to the beginning of the EAPOL data (EAPOL header) | |
2214 | * @len: Length of the EAPOL frame | |
2215 | * Returns: 1 = WPA EAPOL-Key processed, 0 = not a WPA EAPOL-Key, -1 failure | |
2216 | * | |
2217 | * This function is called for each received EAPOL frame. Other than EAPOL-Key | |
2218 | * frames can be skipped if filtering is done elsewhere. wpa_sm_rx_eapol() is | |
2219 | * only processing WPA and WPA2 EAPOL-Key frames. | |
2220 | * | |
2221 | * The received EAPOL-Key packets are validated and valid packets are replied | |
2222 | * to. In addition, key material (PTK, GTK) is configured at the end of a | |
2223 | * successful key handshake. | |
2224 | */ | |
2225 | int wpa_sm_rx_eapol(struct wpa_sm *sm, const u8 *src_addr, | |
2226 | const u8 *buf, size_t len) | |
2227 | { | |
e6270129 | 2228 | size_t plen, data_len, key_data_len; |
d56d7e56 | 2229 | const struct ieee802_1x_hdr *hdr; |
6fc6879b JM |
2230 | struct wpa_eapol_key *key; |
2231 | u16 key_info, ver; | |
d56d7e56 | 2232 | u8 *tmp = NULL; |
6fc6879b | 2233 | int ret = -1; |
6d014ffc | 2234 | u8 *mic, *key_data; |
5e3b5197 | 2235 | size_t mic_len, keyhdrlen; |
6fc6879b JM |
2236 | |
2237 | #ifdef CONFIG_IEEE80211R | |
2238 | sm->ft_completed = 0; | |
2239 | #endif /* CONFIG_IEEE80211R */ | |
2240 | ||
567da5bb | 2241 | mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len); |
6d014ffc | 2242 | keyhdrlen = sizeof(*key) + mic_len + 2; |
5e3b5197 JM |
2243 | |
2244 | if (len < sizeof(*hdr) + keyhdrlen) { | |
f049052b BG |
2245 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2246 | "WPA: EAPOL frame too short to be a WPA " | |
2247 | "EAPOL-Key (len %lu, expecting at least %lu)", | |
2248 | (unsigned long) len, | |
5e3b5197 | 2249 | (unsigned long) sizeof(*hdr) + keyhdrlen); |
6fc6879b JM |
2250 | return 0; |
2251 | } | |
2252 | ||
d56d7e56 | 2253 | hdr = (const struct ieee802_1x_hdr *) buf; |
6fc6879b JM |
2254 | plen = be_to_host16(hdr->length); |
2255 | data_len = plen + sizeof(*hdr); | |
f049052b BG |
2256 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2257 | "IEEE 802.1X RX: version=%d type=%d length=%lu", | |
2258 | hdr->version, hdr->type, (unsigned long) plen); | |
6fc6879b JM |
2259 | |
2260 | if (hdr->version < EAPOL_VERSION) { | |
2261 | /* TODO: backwards compatibility */ | |
2262 | } | |
2263 | if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) { | |
f049052b BG |
2264 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2265 | "WPA: EAPOL frame (type %u) discarded, " | |
6fc6879b JM |
2266 | "not a Key frame", hdr->type); |
2267 | ret = 0; | |
2268 | goto out; | |
2269 | } | |
d56d7e56 | 2270 | wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL-Key", buf, len); |
5e3b5197 | 2271 | if (plen > len - sizeof(*hdr) || plen < keyhdrlen) { |
f049052b BG |
2272 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2273 | "WPA: EAPOL frame payload size %lu " | |
2274 | "invalid (frame size %lu)", | |
2275 | (unsigned long) plen, (unsigned long) len); | |
6fc6879b JM |
2276 | ret = 0; |
2277 | goto out; | |
2278 | } | |
d56d7e56 JM |
2279 | if (data_len < len) { |
2280 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
2281 | "WPA: ignoring %lu bytes after the IEEE 802.1X data", | |
2282 | (unsigned long) len - data_len); | |
2283 | } | |
2284 | ||
2285 | /* | |
2286 | * Make a copy of the frame since we need to modify the buffer during | |
2287 | * MAC validation and Key Data decryption. | |
2288 | */ | |
a1f11e34 | 2289 | tmp = os_memdup(buf, data_len); |
d56d7e56 JM |
2290 | if (tmp == NULL) |
2291 | goto out; | |
d56d7e56 | 2292 | key = (struct wpa_eapol_key *) (tmp + sizeof(struct ieee802_1x_hdr)); |
6d014ffc JM |
2293 | mic = (u8 *) (key + 1); |
2294 | key_data = mic + mic_len + 2; | |
6fc6879b JM |
2295 | |
2296 | if (key->type != EAPOL_KEY_TYPE_WPA && key->type != EAPOL_KEY_TYPE_RSN) | |
2297 | { | |
f049052b BG |
2298 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2299 | "WPA: EAPOL-Key type (%d) unknown, discarded", | |
2300 | key->type); | |
6fc6879b JM |
2301 | ret = 0; |
2302 | goto out; | |
2303 | } | |
6fc6879b | 2304 | |
6d014ffc JM |
2305 | key_data_len = WPA_GET_BE16(mic + mic_len); |
2306 | wpa_eapol_key_dump(sm, key, key_data_len, mic, mic_len); | |
5e3b5197 JM |
2307 | |
2308 | if (key_data_len > plen - keyhdrlen) { | |
d56d7e56 JM |
2309 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Invalid EAPOL-Key " |
2310 | "frame - key_data overflow (%u > %u)", | |
e6270129 | 2311 | (unsigned int) key_data_len, |
5e3b5197 | 2312 | (unsigned int) (plen - keyhdrlen)); |
d56d7e56 | 2313 | goto out; |
6fc6879b | 2314 | } |
d56d7e56 JM |
2315 | |
2316 | eapol_sm_notify_lower_layer_success(sm->eapol, 0); | |
6fc6879b JM |
2317 | key_info = WPA_GET_BE16(key->key_info); |
2318 | ver = key_info & WPA_KEY_INFO_TYPE_MASK; | |
2319 | if (ver != WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && | |
6fc6879b | 2320 | ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && |
df0f01d9 | 2321 | ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES && |
4bc801ab | 2322 | !wpa_use_akm_defined(sm->key_mgmt)) { |
f049052b BG |
2323 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
2324 | "WPA: Unsupported EAPOL-Key descriptor version %d", | |
2325 | ver); | |
6fc6879b JM |
2326 | goto out; |
2327 | } | |
2328 | ||
4bc801ab | 2329 | if (wpa_use_akm_defined(sm->key_mgmt) && |
929a2ea5 JM |
2330 | ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) { |
2331 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, | |
2332 | "RSN: Unsupported EAPOL-Key descriptor version %d (expected AKM defined = 0)", | |
2333 | ver); | |
2334 | goto out; | |
2335 | } | |
2336 | ||
6fc6879b | 2337 | #ifdef CONFIG_IEEE80211R |
56586197 | 2338 | if (wpa_key_mgmt_ft(sm->key_mgmt)) { |
6fc6879b | 2339 | /* IEEE 802.11r uses a new key_info type (AES-128-CMAC). */ |
4bc801ab JM |
2340 | if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && |
2341 | !wpa_use_akm_defined(sm->key_mgmt)) { | |
f049052b BG |
2342 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
2343 | "FT: AP did not use AES-128-CMAC"); | |
6fc6879b JM |
2344 | goto out; |
2345 | } | |
2346 | } else | |
2347 | #endif /* CONFIG_IEEE80211R */ | |
56586197 | 2348 | if (wpa_key_mgmt_sha256(sm->key_mgmt)) { |
df0f01d9 | 2349 | if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && |
4bc801ab | 2350 | !wpa_use_akm_defined(sm->key_mgmt)) { |
f049052b BG |
2351 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
2352 | "WPA: AP did not use the " | |
2353 | "negotiated AES-128-CMAC"); | |
56586197 JM |
2354 | goto out; |
2355 | } | |
7d2ed8ba JM |
2356 | } else if (sm->pairwise_cipher == WPA_CIPHER_CCMP && |
2357 | !wpa_use_akm_defined(sm->key_mgmt) && | |
2358 | ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { | |
f049052b BG |
2359 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
2360 | "WPA: CCMP is used, but EAPOL-Key " | |
2361 | "descriptor version (%d) is not 2", ver); | |
6fc6879b JM |
2362 | if (sm->group_cipher != WPA_CIPHER_CCMP && |
2363 | !(key_info & WPA_KEY_INFO_KEY_TYPE)) { | |
2364 | /* Earlier versions of IEEE 802.11i did not explicitly | |
2365 | * require version 2 descriptor for all EAPOL-Key | |
2366 | * packets, so allow group keys to use version 1 if | |
2367 | * CCMP is not used for them. */ | |
f049052b BG |
2368 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
2369 | "WPA: Backwards compatibility: allow invalid " | |
2370 | "version for non-CCMP group keys"); | |
9f6a7cdd JM |
2371 | } else if (ver == WPA_KEY_INFO_TYPE_AES_128_CMAC) { |
2372 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, | |
2373 | "WPA: Interoperability workaround: allow incorrect (should have been HMAC-SHA1), but stronger (is AES-128-CMAC), descriptor version to be used"); | |
6fc6879b JM |
2374 | } else |
2375 | goto out; | |
801e1173 | 2376 | } else if (sm->pairwise_cipher == WPA_CIPHER_GCMP && |
4bc801ab | 2377 | !wpa_use_akm_defined(sm->key_mgmt) && |
801e1173 | 2378 | ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { |
eb7719ff JM |
2379 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
2380 | "WPA: GCMP is used, but EAPOL-Key " | |
2381 | "descriptor version (%d) is not 2", ver); | |
2382 | goto out; | |
2383 | } | |
6fc6879b | 2384 | |
a0bf1b68 | 2385 | if (sm->rx_replay_counter_set && |
6fc6879b JM |
2386 | os_memcmp(key->replay_counter, sm->rx_replay_counter, |
2387 | WPA_REPLAY_COUNTER_LEN) <= 0) { | |
f049052b BG |
2388 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
2389 | "WPA: EAPOL-Key Replay Counter did not increase - " | |
2390 | "dropping packet"); | |
6fc6879b JM |
2391 | goto out; |
2392 | } | |
2393 | ||
a0bf1b68 JM |
2394 | if (key_info & WPA_KEY_INFO_SMK_MESSAGE) { |
2395 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, | |
2396 | "WPA: Unsupported SMK bit in key_info"); | |
2397 | goto out; | |
2398 | } | |
2399 | ||
2400 | if (!(key_info & WPA_KEY_INFO_ACK)) { | |
f049052b BG |
2401 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
2402 | "WPA: No Ack bit in key_info"); | |
6fc6879b JM |
2403 | goto out; |
2404 | } | |
2405 | ||
2406 | if (key_info & WPA_KEY_INFO_REQUEST) { | |
f049052b BG |
2407 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, |
2408 | "WPA: EAPOL-Key with Request bit - dropped"); | |
6fc6879b JM |
2409 | goto out; |
2410 | } | |
2411 | ||
a0bf1b68 | 2412 | if ((key_info & WPA_KEY_INFO_MIC) && |
6d014ffc | 2413 | wpa_supplicant_verify_eapol_key_mic(sm, key, ver, tmp, data_len)) |
6fc6879b JM |
2414 | goto out; |
2415 | ||
0ab1dd01 JM |
2416 | #ifdef CONFIG_FILS |
2417 | if (!mic_len && (key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { | |
2418 | if (wpa_supp_aead_decrypt(sm, tmp, data_len, &key_data_len)) | |
2419 | goto out; | |
2420 | } | |
2421 | #endif /* CONFIG_FILS */ | |
2422 | ||
a14896e8 | 2423 | if ((sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) && |
0ab1dd01 | 2424 | (key_info & WPA_KEY_INFO_ENCR_KEY_DATA) && mic_len) { |
3e34cfdf MV |
2425 | /* |
2426 | * Only decrypt the Key Data field if the frame's authenticity | |
2427 | * was verified. When using AES-SIV (FILS), the MIC flag is not | |
2428 | * set, so this check should only be performed if mic_len != 0 | |
2429 | * which is the case in this code branch. | |
2430 | */ | |
2431 | if (!(key_info & WPA_KEY_INFO_MIC)) { | |
2432 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, | |
2433 | "WPA: Ignore EAPOL-Key with encrypted but unauthenticated data"); | |
2434 | goto out; | |
2435 | } | |
6d014ffc JM |
2436 | if (wpa_supplicant_decrypt_key_data(sm, key, mic_len, |
2437 | ver, key_data, | |
e6270129 | 2438 | &key_data_len)) |
d56d7e56 | 2439 | goto out; |
6fc6879b JM |
2440 | } |
2441 | ||
2442 | if (key_info & WPA_KEY_INFO_KEY_TYPE) { | |
2443 | if (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) { | |
f049052b BG |
2444 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
2445 | "WPA: Ignored EAPOL-Key (Pairwise) with " | |
2446 | "non-zero key index"); | |
6fc6879b JM |
2447 | goto out; |
2448 | } | |
a0bf1b68 JM |
2449 | if (key_info & (WPA_KEY_INFO_MIC | |
2450 | WPA_KEY_INFO_ENCR_KEY_DATA)) { | |
6fc6879b | 2451 | /* 3/4 4-Way Handshake */ |
e6270129 JM |
2452 | wpa_supplicant_process_3_of_4(sm, key, ver, key_data, |
2453 | key_data_len); | |
6fc6879b JM |
2454 | } else { |
2455 | /* 1/4 4-Way Handshake */ | |
2456 | wpa_supplicant_process_1_of_4(sm, src_addr, key, | |
e6270129 JM |
2457 | ver, key_data, |
2458 | key_data_len); | |
6fc6879b | 2459 | } |
6fc6879b | 2460 | } else { |
16eb4858 JM |
2461 | if ((mic_len && (key_info & WPA_KEY_INFO_MIC)) || |
2462 | (!mic_len && (key_info & WPA_KEY_INFO_ENCR_KEY_DATA))) { | |
6fc6879b JM |
2463 | /* 1/2 Group Key Handshake */ |
2464 | wpa_supplicant_process_1_of_2(sm, src_addr, key, | |
e6270129 JM |
2465 | key_data, key_data_len, |
2466 | ver); | |
6fc6879b | 2467 | } else { |
f049052b | 2468 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
16eb4858 | 2469 | "WPA: EAPOL-Key (Group) without Mic/Encr bit - " |
f049052b | 2470 | "dropped"); |
6fc6879b JM |
2471 | } |
2472 | } | |
2473 | ||
2474 | ret = 1; | |
2475 | ||
2476 | out: | |
fbfc974c | 2477 | bin_clear_free(tmp, data_len); |
6fc6879b JM |
2478 | return ret; |
2479 | } | |
2480 | ||
2481 | ||
2482 | #ifdef CONFIG_CTRL_IFACE | |
6fc6879b JM |
2483 | static u32 wpa_key_mgmt_suite(struct wpa_sm *sm) |
2484 | { | |
2485 | switch (sm->key_mgmt) { | |
2486 | case WPA_KEY_MGMT_IEEE8021X: | |
a14896e8 JM |
2487 | return ((sm->proto == WPA_PROTO_RSN || |
2488 | sm->proto == WPA_PROTO_OSEN) ? | |
6fc6879b JM |
2489 | RSN_AUTH_KEY_MGMT_UNSPEC_802_1X : |
2490 | WPA_AUTH_KEY_MGMT_UNSPEC_802_1X); | |
2491 | case WPA_KEY_MGMT_PSK: | |
2492 | return (sm->proto == WPA_PROTO_RSN ? | |
2493 | RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X : | |
2494 | WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X); | |
2495 | #ifdef CONFIG_IEEE80211R | |
2496 | case WPA_KEY_MGMT_FT_IEEE8021X: | |
2497 | return RSN_AUTH_KEY_MGMT_FT_802_1X; | |
2498 | case WPA_KEY_MGMT_FT_PSK: | |
2499 | return RSN_AUTH_KEY_MGMT_FT_PSK; | |
2500 | #endif /* CONFIG_IEEE80211R */ | |
56586197 JM |
2501 | case WPA_KEY_MGMT_IEEE8021X_SHA256: |
2502 | return RSN_AUTH_KEY_MGMT_802_1X_SHA256; | |
2503 | case WPA_KEY_MGMT_PSK_SHA256: | |
2504 | return RSN_AUTH_KEY_MGMT_PSK_SHA256; | |
369c8d7b JM |
2505 | case WPA_KEY_MGMT_CCKM: |
2506 | return (sm->proto == WPA_PROTO_RSN ? | |
2507 | RSN_AUTH_KEY_MGMT_CCKM: | |
2508 | WPA_AUTH_KEY_MGMT_CCKM); | |
6fc6879b JM |
2509 | case WPA_KEY_MGMT_WPA_NONE: |
2510 | return WPA_AUTH_KEY_MGMT_NONE; | |
666497c8 JM |
2511 | case WPA_KEY_MGMT_IEEE8021X_SUITE_B: |
2512 | return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B; | |
5e3b5197 JM |
2513 | case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192: |
2514 | return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192; | |
6fc6879b JM |
2515 | default: |
2516 | return 0; | |
2517 | } | |
2518 | } | |
2519 | ||
2520 | ||
6fc6879b JM |
2521 | #define RSN_SUITE "%02x-%02x-%02x-%d" |
2522 | #define RSN_SUITE_ARG(s) \ | |
2523 | ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff | |
2524 | ||
2525 | /** | |
2526 | * wpa_sm_get_mib - Dump text list of MIB entries | |
2527 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2528 | * @buf: Buffer for the list | |
2529 | * @buflen: Length of the buffer | |
2530 | * Returns: Number of bytes written to buffer | |
2531 | * | |
2532 | * This function is used fetch dot11 MIB variables. | |
2533 | */ | |
2534 | int wpa_sm_get_mib(struct wpa_sm *sm, char *buf, size_t buflen) | |
2535 | { | |
2536 | char pmkid_txt[PMKID_LEN * 2 + 1]; | |
2537 | int rsna, ret; | |
2538 | size_t len; | |
2539 | ||
2540 | if (sm->cur_pmksa) { | |
2541 | wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt), | |
2542 | sm->cur_pmksa->pmkid, PMKID_LEN); | |
2543 | } else | |
2544 | pmkid_txt[0] = '\0'; | |
2545 | ||
56586197 JM |
2546 | if ((wpa_key_mgmt_wpa_psk(sm->key_mgmt) || |
2547 | wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt)) && | |
6fc6879b JM |
2548 | sm->proto == WPA_PROTO_RSN) |
2549 | rsna = 1; | |
2550 | else | |
2551 | rsna = 0; | |
2552 | ||
2553 | ret = os_snprintf(buf, buflen, | |
2554 | "dot11RSNAOptionImplemented=TRUE\n" | |
2555 | "dot11RSNAPreauthenticationImplemented=TRUE\n" | |
2556 | "dot11RSNAEnabled=%s\n" | |
2557 | "dot11RSNAPreauthenticationEnabled=%s\n" | |
2558 | "dot11RSNAConfigVersion=%d\n" | |
2559 | "dot11RSNAConfigPairwiseKeysSupported=5\n" | |
2560 | "dot11RSNAConfigGroupCipherSize=%d\n" | |
2561 | "dot11RSNAConfigPMKLifetime=%d\n" | |
2562 | "dot11RSNAConfigPMKReauthThreshold=%d\n" | |
2563 | "dot11RSNAConfigNumberOfPTKSAReplayCounters=1\n" | |
2564 | "dot11RSNAConfigSATimeout=%d\n", | |
2565 | rsna ? "TRUE" : "FALSE", | |
2566 | rsna ? "TRUE" : "FALSE", | |
2567 | RSN_VERSION, | |
c3550295 | 2568 | wpa_cipher_key_len(sm->group_cipher) * 8, |
6fc6879b JM |
2569 | sm->dot11RSNAConfigPMKLifetime, |
2570 | sm->dot11RSNAConfigPMKReauthThreshold, | |
2571 | sm->dot11RSNAConfigSATimeout); | |
d85e1fc8 | 2572 | if (os_snprintf_error(buflen, ret)) |
6fc6879b JM |
2573 | return 0; |
2574 | len = ret; | |
2575 | ||
2576 | ret = os_snprintf( | |
2577 | buf + len, buflen - len, | |
2578 | "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n" | |
2579 | "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n" | |
2580 | "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n" | |
2581 | "dot11RSNAPMKIDUsed=%s\n" | |
2582 | "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n" | |
2583 | "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n" | |
2584 | "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n" | |
2585 | "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n" | |
2586 | "dot11RSNA4WayHandshakeFailures=%u\n", | |
2587 | RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)), | |
c3550295 JM |
2588 | RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, |
2589 | sm->pairwise_cipher)), | |
2590 | RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, | |
2591 | sm->group_cipher)), | |
6fc6879b JM |
2592 | pmkid_txt, |
2593 | RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)), | |
c3550295 JM |
2594 | RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, |
2595 | sm->pairwise_cipher)), | |
2596 | RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, | |
2597 | sm->group_cipher)), | |
6fc6879b | 2598 | sm->dot11RSNA4WayHandshakeFailures); |
1f102d3b | 2599 | if (!os_snprintf_error(buflen - len, ret)) |
6fc6879b JM |
2600 | len += ret; |
2601 | ||
2602 | return (int) len; | |
2603 | } | |
2604 | #endif /* CONFIG_CTRL_IFACE */ | |
2605 | ||
2606 | ||
2607 | static void wpa_sm_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry, | |
6aaac006 | 2608 | void *ctx, enum pmksa_free_reason reason) |
6fc6879b JM |
2609 | { |
2610 | struct wpa_sm *sm = ctx; | |
6aaac006 | 2611 | int deauth = 0; |
6fc6879b | 2612 | |
6aaac006 DW |
2613 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: PMKSA cache entry free_cb: " |
2614 | MACSTR " reason=%d", MAC2STR(entry->aa), reason); | |
2615 | ||
2616 | if (sm->cur_pmksa == entry) { | |
2617 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
2618 | "RSN: %s current PMKSA entry", | |
2619 | reason == PMKSA_REPLACE ? "replaced" : "removed"); | |
2620 | pmksa_cache_clear_current(sm); | |
2621 | ||
2622 | /* | |
2623 | * If an entry is simply being replaced, there's no need to | |
2624 | * deauthenticate because it will be immediately re-added. | |
2625 | * This happens when EAP authentication is completed again | |
2626 | * (reauth or failed PMKSA caching attempt). | |
2627 | */ | |
2628 | if (reason != PMKSA_REPLACE) | |
2629 | deauth = 1; | |
2630 | } | |
2631 | ||
2632 | if (reason == PMKSA_EXPIRE && | |
6fc6879b JM |
2633 | (sm->pmk_len == entry->pmk_len && |
2634 | os_memcmp(sm->pmk, entry->pmk, sm->pmk_len) == 0)) { | |
f049052b | 2635 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
6aaac006 DW |
2636 | "RSN: deauthenticating due to expired PMK"); |
2637 | pmksa_cache_clear_current(sm); | |
2638 | deauth = 1; | |
2639 | } | |
6fc6879b | 2640 | |
6aaac006 | 2641 | if (deauth) { |
1bd13110 | 2642 | sm->pmk_len = 0; |
6fc6879b JM |
2643 | os_memset(sm->pmk, 0, sizeof(sm->pmk)); |
2644 | wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); | |
6fc6879b JM |
2645 | } |
2646 | } | |
2647 | ||
2648 | ||
2649 | /** | |
2650 | * wpa_sm_init - Initialize WPA state machine | |
2651 | * @ctx: Context pointer for callbacks; this needs to be an allocated buffer | |
2652 | * Returns: Pointer to the allocated WPA state machine data | |
2653 | * | |
2654 | * This function is used to allocate a new WPA state machine and the returned | |
2655 | * value is passed to all WPA state machine calls. | |
2656 | */ | |
2657 | struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx) | |
2658 | { | |
2659 | struct wpa_sm *sm; | |
2660 | ||
2661 | sm = os_zalloc(sizeof(*sm)); | |
2662 | if (sm == NULL) | |
2663 | return NULL; | |
c5b26e33 | 2664 | dl_list_init(&sm->pmksa_candidates); |
6fc6879b JM |
2665 | sm->renew_snonce = 1; |
2666 | sm->ctx = ctx; | |
2667 | ||
2668 | sm->dot11RSNAConfigPMKLifetime = 43200; | |
2669 | sm->dot11RSNAConfigPMKReauthThreshold = 70; | |
2670 | sm->dot11RSNAConfigSATimeout = 60; | |
2671 | ||
2672 | sm->pmksa = pmksa_cache_init(wpa_sm_pmksa_free_cb, sm, sm); | |
2673 | if (sm->pmksa == NULL) { | |
f049052b BG |
2674 | wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, |
2675 | "RSN: PMKSA cache initialization failed"); | |
6fc6879b JM |
2676 | os_free(sm); |
2677 | return NULL; | |
2678 | } | |
2679 | ||
2680 | return sm; | |
2681 | } | |
2682 | ||
2683 | ||
2684 | /** | |
2685 | * wpa_sm_deinit - Deinitialize WPA state machine | |
2686 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2687 | */ | |
2688 | void wpa_sm_deinit(struct wpa_sm *sm) | |
2689 | { | |
2690 | if (sm == NULL) | |
2691 | return; | |
2692 | pmksa_cache_deinit(sm->pmksa); | |
2693 | eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL); | |
581a8cde | 2694 | eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); |
6fc6879b | 2695 | os_free(sm->assoc_wpa_ie); |
6d6c8877 | 2696 | os_free(sm->assoc_rsnxe); |
6fc6879b JM |
2697 | os_free(sm->ap_wpa_ie); |
2698 | os_free(sm->ap_rsn_ie); | |
146889e3 | 2699 | os_free(sm->ap_rsnxe); |
71932544 | 2700 | wpa_sm_drop_sa(sm); |
6fc6879b | 2701 | os_free(sm->ctx); |
55046414 JM |
2702 | #ifdef CONFIG_IEEE80211R |
2703 | os_free(sm->assoc_resp_ies); | |
2704 | #endif /* CONFIG_IEEE80211R */ | |
651c6a84 JM |
2705 | #ifdef CONFIG_TESTING_OPTIONS |
2706 | wpabuf_free(sm->test_assoc_ie); | |
2707 | #endif /* CONFIG_TESTING_OPTIONS */ | |
0119d442 | 2708 | #ifdef CONFIG_FILS_SK_PFS |
76e20f4f | 2709 | crypto_ecdh_deinit(sm->fils_ecdh); |
0119d442 | 2710 | #endif /* CONFIG_FILS_SK_PFS */ |
7d440a3b JM |
2711 | #ifdef CONFIG_FILS |
2712 | wpabuf_free(sm->fils_ft_ies); | |
2713 | #endif /* CONFIG_FILS */ | |
0a614799 JM |
2714 | #ifdef CONFIG_OWE |
2715 | crypto_ecdh_deinit(sm->owe_ecdh); | |
2716 | #endif /* CONFIG_OWE */ | |
10ec6a5f JM |
2717 | #ifdef CONFIG_DPP2 |
2718 | wpabuf_clear_free(sm->dpp_z); | |
2719 | #endif /* CONFIG_DPP2 */ | |
6fc6879b JM |
2720 | os_free(sm); |
2721 | } | |
2722 | ||
2723 | ||
2724 | /** | |
2725 | * wpa_sm_notify_assoc - Notify WPA state machine about association | |
2726 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2727 | * @bssid: The BSSID of the new association | |
2728 | * | |
2729 | * This function is called to let WPA state machine know that the connection | |
2730 | * was established. | |
2731 | */ | |
2732 | void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid) | |
2733 | { | |
cb5132bb | 2734 | int clear_keys = 1; |
58a98fb0 | 2735 | |
6fc6879b JM |
2736 | if (sm == NULL) |
2737 | return; | |
2738 | ||
f049052b BG |
2739 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
2740 | "WPA: Association event - clear replay counter"); | |
6fc6879b JM |
2741 | os_memcpy(sm->bssid, bssid, ETH_ALEN); |
2742 | os_memset(sm->rx_replay_counter, 0, WPA_REPLAY_COUNTER_LEN); | |
2743 | sm->rx_replay_counter_set = 0; | |
2744 | sm->renew_snonce = 1; | |
2745 | if (os_memcmp(sm->preauth_bssid, bssid, ETH_ALEN) == 0) | |
2746 | rsn_preauth_deinit(sm); | |
2747 | ||
2748 | #ifdef CONFIG_IEEE80211R | |
58a98fb0 | 2749 | if (wpa_ft_is_completed(sm)) { |
5d5a9f00 JM |
2750 | /* |
2751 | * Clear portValid to kick EAPOL state machine to re-enter | |
2752 | * AUTHENTICATED state to get the EAPOL port Authorized. | |
2753 | */ | |
2754 | eapol_sm_notify_portValid(sm->eapol, FALSE); | |
6fc6879b JM |
2755 | wpa_supplicant_key_neg_complete(sm, sm->bssid, 1); |
2756 | ||
2757 | /* Prepare for the next transition */ | |
76b7981d | 2758 | wpa_ft_prepare_auth_request(sm, NULL); |
58a98fb0 | 2759 | |
cb5132bb | 2760 | clear_keys = 0; |
0a1a82db JM |
2761 | sm->ft_protocol = 1; |
2762 | } else { | |
2763 | sm->ft_protocol = 0; | |
6fc6879b JM |
2764 | } |
2765 | #endif /* CONFIG_IEEE80211R */ | |
706df429 JM |
2766 | #ifdef CONFIG_FILS |
2767 | if (sm->fils_completed) { | |
2768 | /* | |
2769 | * Clear portValid to kick EAPOL state machine to re-enter | |
2770 | * AUTHENTICATED state to get the EAPOL port Authorized. | |
2771 | */ | |
2772 | wpa_supplicant_key_neg_complete(sm, sm->bssid, 1); | |
cb5132bb | 2773 | clear_keys = 0; |
706df429 JM |
2774 | } |
2775 | #endif /* CONFIG_FILS */ | |
58a98fb0 | 2776 | |
cb5132bb | 2777 | if (clear_keys) { |
58a98fb0 JM |
2778 | /* |
2779 | * IEEE 802.11, 8.4.10: Delete PTK SA on (re)association if | |
2780 | * this is not part of a Fast BSS Transition. | |
2781 | */ | |
f049052b | 2782 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PTK"); |
58a98fb0 | 2783 | sm->ptk_set = 0; |
d2c33b91 | 2784 | os_memset(&sm->ptk, 0, sizeof(sm->ptk)); |
58a98fb0 | 2785 | sm->tptk_set = 0; |
d2c33b91 | 2786 | os_memset(&sm->tptk, 0, sizeof(sm->tptk)); |
cb5132bb | 2787 | os_memset(&sm->gtk, 0, sizeof(sm->gtk)); |
87e2db16 | 2788 | os_memset(&sm->gtk_wnm_sleep, 0, sizeof(sm->gtk_wnm_sleep)); |
cb5132bb | 2789 | os_memset(&sm->igtk, 0, sizeof(sm->igtk)); |
87e2db16 | 2790 | os_memset(&sm->igtk_wnm_sleep, 0, sizeof(sm->igtk_wnm_sleep)); |
58a98fb0 | 2791 | } |
40cf22e6 JM |
2792 | |
2793 | #ifdef CONFIG_TDLS | |
2794 | wpa_tdls_assoc(sm); | |
2795 | #endif /* CONFIG_TDLS */ | |
25ef8529 JM |
2796 | |
2797 | #ifdef CONFIG_P2P | |
2798 | os_memset(sm->p2p_ip_addr, 0, sizeof(sm->p2p_ip_addr)); | |
2799 | #endif /* CONFIG_P2P */ | |
6fc6879b JM |
2800 | } |
2801 | ||
2802 | ||
2803 | /** | |
2804 | * wpa_sm_notify_disassoc - Notify WPA state machine about disassociation | |
2805 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2806 | * | |
2807 | * This function is called to let WPA state machine know that the connection | |
2808 | * was lost. This will abort any existing pre-authentication session. | |
2809 | */ | |
2810 | void wpa_sm_notify_disassoc(struct wpa_sm *sm) | |
2811 | { | |
ac8e074e JM |
2812 | eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL); |
2813 | eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); | |
6fc6879b | 2814 | rsn_preauth_deinit(sm); |
0639970d | 2815 | pmksa_cache_clear_current(sm); |
6fc6879b JM |
2816 | if (wpa_sm_get_state(sm) == WPA_4WAY_HANDSHAKE) |
2817 | sm->dot11RSNA4WayHandshakeFailures++; | |
40cf22e6 JM |
2818 | #ifdef CONFIG_TDLS |
2819 | wpa_tdls_disassoc(sm); | |
2820 | #endif /* CONFIG_TDLS */ | |
706df429 JM |
2821 | #ifdef CONFIG_FILS |
2822 | sm->fils_completed = 0; | |
2823 | #endif /* CONFIG_FILS */ | |
2a9c5217 JM |
2824 | #ifdef CONFIG_IEEE80211R |
2825 | sm->ft_reassoc_completed = 0; | |
0a1a82db | 2826 | sm->ft_protocol = 0; |
2a9c5217 | 2827 | #endif /* CONFIG_IEEE80211R */ |
71932544 JM |
2828 | |
2829 | /* Keys are not needed in the WPA state machine anymore */ | |
2830 | wpa_sm_drop_sa(sm); | |
761396e4 JM |
2831 | |
2832 | sm->msg_3_of_4_ok = 0; | |
c0fe5f12 | 2833 | os_memset(sm->bssid, 0, ETH_ALEN); |
6fc6879b JM |
2834 | } |
2835 | ||
2836 | ||
2837 | /** | |
2838 | * wpa_sm_set_pmk - Set PMK | |
2839 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2840 | * @pmk: The new PMK | |
2841 | * @pmk_len: The length of the new PMK in bytes | |
70c93963 | 2842 | * @pmkid: Calculated PMKID |
bc26ac50 | 2843 | * @bssid: AA to add into PMKSA cache or %NULL to not cache the PMK |
6fc6879b JM |
2844 | * |
2845 | * Configure the PMK for WPA state machine. | |
2846 | */ | |
bc26ac50 | 2847 | void wpa_sm_set_pmk(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len, |
70c93963 | 2848 | const u8 *pmkid, const u8 *bssid) |
6fc6879b JM |
2849 | { |
2850 | if (sm == NULL) | |
2851 | return; | |
2852 | ||
00583ef1 JM |
2853 | wpa_hexdump_key(MSG_DEBUG, "WPA: Set PMK based on external data", |
2854 | pmk, pmk_len); | |
6fc6879b JM |
2855 | sm->pmk_len = pmk_len; |
2856 | os_memcpy(sm->pmk, pmk, pmk_len); | |
2857 | ||
2858 | #ifdef CONFIG_IEEE80211R | |
2859 | /* Set XXKey to be PSK for FT key derivation */ | |
2860 | sm->xxkey_len = pmk_len; | |
2861 | os_memcpy(sm->xxkey, pmk, pmk_len); | |
2862 | #endif /* CONFIG_IEEE80211R */ | |
bc26ac50 JM |
2863 | |
2864 | if (bssid) { | |
70c93963 | 2865 | pmksa_cache_add(sm->pmksa, pmk, pmk_len, pmkid, NULL, 0, |
087a1f4e | 2866 | bssid, sm->own_addr, |
869af307 | 2867 | sm->network_ctx, sm->key_mgmt, NULL); |
bc26ac50 | 2868 | } |
6fc6879b JM |
2869 | } |
2870 | ||
2871 | ||
2872 | /** | |
2873 | * wpa_sm_set_pmk_from_pmksa - Set PMK based on the current PMKSA | |
2874 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2875 | * | |
2876 | * Take the PMK from the current PMKSA into use. If no PMKSA is active, the PMK | |
2877 | * will be cleared. | |
2878 | */ | |
2879 | void wpa_sm_set_pmk_from_pmksa(struct wpa_sm *sm) | |
2880 | { | |
2881 | if (sm == NULL) | |
2882 | return; | |
2883 | ||
2884 | if (sm->cur_pmksa) { | |
00583ef1 JM |
2885 | wpa_hexdump_key(MSG_DEBUG, |
2886 | "WPA: Set PMK based on current PMKSA", | |
2887 | sm->cur_pmksa->pmk, sm->cur_pmksa->pmk_len); | |
6fc6879b JM |
2888 | sm->pmk_len = sm->cur_pmksa->pmk_len; |
2889 | os_memcpy(sm->pmk, sm->cur_pmksa->pmk, sm->pmk_len); | |
2890 | } else { | |
00583ef1 | 2891 | wpa_printf(MSG_DEBUG, "WPA: No current PMKSA - clear PMK"); |
b488a129 JM |
2892 | sm->pmk_len = 0; |
2893 | os_memset(sm->pmk, 0, PMK_LEN_MAX); | |
6fc6879b JM |
2894 | } |
2895 | } | |
2896 | ||
2897 | ||
2898 | /** | |
2899 | * wpa_sm_set_fast_reauth - Set fast reauthentication (EAP) enabled/disabled | |
2900 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2901 | * @fast_reauth: Whether fast reauthentication (EAP) is allowed | |
2902 | */ | |
2903 | void wpa_sm_set_fast_reauth(struct wpa_sm *sm, int fast_reauth) | |
2904 | { | |
2905 | if (sm) | |
2906 | sm->fast_reauth = fast_reauth; | |
2907 | } | |
2908 | ||
2909 | ||
2910 | /** | |
2911 | * wpa_sm_set_scard_ctx - Set context pointer for smartcard callbacks | |
2912 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2913 | * @scard_ctx: Context pointer for smartcard related callback functions | |
2914 | */ | |
2915 | void wpa_sm_set_scard_ctx(struct wpa_sm *sm, void *scard_ctx) | |
2916 | { | |
2917 | if (sm == NULL) | |
2918 | return; | |
2919 | sm->scard_ctx = scard_ctx; | |
2920 | if (sm->preauth_eapol) | |
2921 | eapol_sm_register_scard_ctx(sm->preauth_eapol, scard_ctx); | |
2922 | } | |
2923 | ||
2924 | ||
2925 | /** | |
0d445cd3 | 2926 | * wpa_sm_set_config - Notification of current configuration change |
6fc6879b JM |
2927 | * @sm: Pointer to WPA state machine data from wpa_sm_init() |
2928 | * @config: Pointer to current network configuration | |
2929 | * | |
2930 | * Notify WPA state machine that configuration has changed. config will be | |
2931 | * stored as a backpointer to network configuration. This can be %NULL to clear | |
2932 | * the stored pointed. | |
2933 | */ | |
2934 | void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config) | |
2935 | { | |
2936 | if (!sm) | |
2937 | return; | |
2938 | ||
6fc6879b | 2939 | if (config) { |
886a807f | 2940 | sm->network_ctx = config->network_ctx; |
6fc6879b JM |
2941 | sm->allowed_pairwise_cipher = config->allowed_pairwise_cipher; |
2942 | sm->proactive_key_caching = config->proactive_key_caching; | |
2943 | sm->eap_workaround = config->eap_workaround; | |
2944 | sm->eap_conf_ctx = config->eap_conf_ctx; | |
2945 | if (config->ssid) { | |
2946 | os_memcpy(sm->ssid, config->ssid, config->ssid_len); | |
2947 | sm->ssid_len = config->ssid_len; | |
2948 | } else | |
2949 | sm->ssid_len = 0; | |
581a8cde | 2950 | sm->wpa_ptk_rekey = config->wpa_ptk_rekey; |
25ef8529 | 2951 | sm->p2p = config->p2p; |
73ed03f3 | 2952 | sm->wpa_rsc_relaxation = config->wpa_rsc_relaxation; |
8b138d28 | 2953 | sm->owe_ptk_workaround = config->owe_ptk_workaround; |
869af307 JM |
2954 | #ifdef CONFIG_FILS |
2955 | if (config->fils_cache_id) { | |
2956 | sm->fils_cache_id_set = 1; | |
2957 | os_memcpy(sm->fils_cache_id, config->fils_cache_id, | |
2958 | FILS_CACHE_ID_LEN); | |
2959 | } else { | |
2960 | sm->fils_cache_id_set = 0; | |
2961 | } | |
ecbf59e6 | 2962 | sm->beacon_prot = config->beacon_prot; |
869af307 | 2963 | #endif /* CONFIG_FILS */ |
6fc6879b | 2964 | } else { |
886a807f | 2965 | sm->network_ctx = NULL; |
6fc6879b JM |
2966 | sm->allowed_pairwise_cipher = 0; |
2967 | sm->proactive_key_caching = 0; | |
2968 | sm->eap_workaround = 0; | |
2969 | sm->eap_conf_ctx = NULL; | |
2970 | sm->ssid_len = 0; | |
581a8cde | 2971 | sm->wpa_ptk_rekey = 0; |
25ef8529 | 2972 | sm->p2p = 0; |
73ed03f3 | 2973 | sm->wpa_rsc_relaxation = 0; |
8b138d28 | 2974 | sm->owe_ptk_workaround = 0; |
ecbf59e6 | 2975 | sm->beacon_prot = 0; |
6fc6879b | 2976 | } |
6fc6879b JM |
2977 | } |
2978 | ||
2979 | ||
2980 | /** | |
2981 | * wpa_sm_set_own_addr - Set own MAC address | |
2982 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2983 | * @addr: Own MAC address | |
2984 | */ | |
2985 | void wpa_sm_set_own_addr(struct wpa_sm *sm, const u8 *addr) | |
2986 | { | |
2987 | if (sm) | |
2988 | os_memcpy(sm->own_addr, addr, ETH_ALEN); | |
2989 | } | |
2990 | ||
2991 | ||
2992 | /** | |
2993 | * wpa_sm_set_ifname - Set network interface name | |
2994 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
2995 | * @ifname: Interface name | |
2996 | * @bridge_ifname: Optional bridge interface name (for pre-auth) | |
2997 | */ | |
2998 | void wpa_sm_set_ifname(struct wpa_sm *sm, const char *ifname, | |
2999 | const char *bridge_ifname) | |
3000 | { | |
3001 | if (sm) { | |
3002 | sm->ifname = ifname; | |
3003 | sm->bridge_ifname = bridge_ifname; | |
3004 | } | |
3005 | } | |
3006 | ||
3007 | ||
3008 | /** | |
3009 | * wpa_sm_set_eapol - Set EAPOL state machine pointer | |
3010 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
3011 | * @eapol: Pointer to EAPOL state machine allocated with eapol_sm_init() | |
3012 | */ | |
3013 | void wpa_sm_set_eapol(struct wpa_sm *sm, struct eapol_sm *eapol) | |
3014 | { | |
3015 | if (sm) | |
3016 | sm->eapol = eapol; | |
3017 | } | |
3018 | ||
3019 | ||
3020 | /** | |
3021 | * wpa_sm_set_param - Set WPA state machine parameters | |
3022 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
3023 | * @param: Parameter field | |
3024 | * @value: Parameter value | |
3025 | * Returns: 0 on success, -1 on failure | |
3026 | */ | |
3027 | int wpa_sm_set_param(struct wpa_sm *sm, enum wpa_sm_conf_params param, | |
3028 | unsigned int value) | |
3029 | { | |
3030 | int ret = 0; | |
3031 | ||
3032 | if (sm == NULL) | |
3033 | return -1; | |
3034 | ||
3035 | switch (param) { | |
3036 | case RSNA_PMK_LIFETIME: | |
3037 | if (value > 0) | |
3038 | sm->dot11RSNAConfigPMKLifetime = value; | |
3039 | else | |
3040 | ret = -1; | |
3041 | break; | |
3042 | case RSNA_PMK_REAUTH_THRESHOLD: | |
3043 | if (value > 0 && value <= 100) | |
3044 | sm->dot11RSNAConfigPMKReauthThreshold = value; | |
3045 | else | |
3046 | ret = -1; | |
3047 | break; | |
3048 | case RSNA_SA_TIMEOUT: | |
3049 | if (value > 0) | |
3050 | sm->dot11RSNAConfigSATimeout = value; | |
3051 | else | |
3052 | ret = -1; | |
3053 | break; | |
3054 | case WPA_PARAM_PROTO: | |
3055 | sm->proto = value; | |
3056 | break; | |
3057 | case WPA_PARAM_PAIRWISE: | |
3058 | sm->pairwise_cipher = value; | |
3059 | break; | |
3060 | case WPA_PARAM_GROUP: | |
3061 | sm->group_cipher = value; | |
3062 | break; | |
3063 | case WPA_PARAM_KEY_MGMT: | |
3064 | sm->key_mgmt = value; | |
3065 | break; | |
6fc6879b JM |
3066 | case WPA_PARAM_MGMT_GROUP: |
3067 | sm->mgmt_group_cipher = value; | |
3068 | break; | |
6fc6879b JM |
3069 | case WPA_PARAM_RSN_ENABLED: |
3070 | sm->rsn_enabled = value; | |
3071 | break; | |
e820cf95 JM |
3072 | case WPA_PARAM_MFP: |
3073 | sm->mfp = value; | |
3074 | break; | |
55c12f5d MV |
3075 | case WPA_PARAM_OCV: |
3076 | sm->ocv = value; | |
3077 | break; | |
6d6c8877 JM |
3078 | case WPA_PARAM_SAE_PWE: |
3079 | sm->sae_pwe = value; | |
3080 | break; | |
6fc6879b JM |
3081 | default: |
3082 | break; | |
3083 | } | |
3084 | ||
3085 | return ret; | |
3086 | } | |
3087 | ||
3088 | ||
6fc6879b JM |
3089 | /** |
3090 | * wpa_sm_get_status - Get WPA state machine | |
3091 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
3092 | * @buf: Buffer for status information | |
3093 | * @buflen: Maximum buffer length | |
3094 | * @verbose: Whether to include verbose status information | |
3095 | * Returns: Number of bytes written to buf. | |
3096 | * | |
3097 | * Query WPA state machine for status information. This function fills in | |
3098 | * a text area with current status information. If the buffer (buf) is not | |
3099 | * large enough, status information will be truncated to fit the buffer. | |
3100 | */ | |
3101 | int wpa_sm_get_status(struct wpa_sm *sm, char *buf, size_t buflen, | |
3102 | int verbose) | |
3103 | { | |
3104 | char *pos = buf, *end = buf + buflen; | |
3105 | int ret; | |
3106 | ||
3107 | ret = os_snprintf(pos, end - pos, | |
3108 | "pairwise_cipher=%s\n" | |
3109 | "group_cipher=%s\n" | |
3110 | "key_mgmt=%s\n", | |
3111 | wpa_cipher_txt(sm->pairwise_cipher), | |
3112 | wpa_cipher_txt(sm->group_cipher), | |
3113 | wpa_key_mgmt_txt(sm->key_mgmt, sm->proto)); | |
d85e1fc8 | 3114 | if (os_snprintf_error(end - pos, ret)) |
6fc6879b JM |
3115 | return pos - buf; |
3116 | pos += ret; | |
13e1d2e2 JM |
3117 | |
3118 | if (sm->mfp != NO_MGMT_FRAME_PROTECTION && sm->ap_rsn_ie) { | |
3119 | struct wpa_ie_data rsn; | |
3120 | if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) | |
3121 | >= 0 && | |
3122 | rsn.capabilities & (WPA_CAPABILITY_MFPR | | |
3123 | WPA_CAPABILITY_MFPC)) { | |
3a5954ef JM |
3124 | ret = os_snprintf(pos, end - pos, "pmf=%d\n" |
3125 | "mgmt_group_cipher=%s\n", | |
13e1d2e2 | 3126 | (rsn.capabilities & |
3a5954ef JM |
3127 | WPA_CAPABILITY_MFPR) ? 2 : 1, |
3128 | wpa_cipher_txt( | |
3129 | sm->mgmt_group_cipher)); | |
d85e1fc8 | 3130 | if (os_snprintf_error(end - pos, ret)) |
13e1d2e2 JM |
3131 | return pos - buf; |
3132 | pos += ret; | |
3133 | } | |
3134 | } | |
3135 | ||
6fc6879b JM |
3136 | return pos - buf; |
3137 | } | |
3138 | ||
3139 | ||
ae8535b6 JM |
3140 | int wpa_sm_pmf_enabled(struct wpa_sm *sm) |
3141 | { | |
3142 | struct wpa_ie_data rsn; | |
3143 | ||
3144 | if (sm->mfp == NO_MGMT_FRAME_PROTECTION || !sm->ap_rsn_ie) | |
3145 | return 0; | |
3146 | ||
3147 | if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) >= 0 && | |
3148 | rsn.capabilities & (WPA_CAPABILITY_MFPR | WPA_CAPABILITY_MFPC)) | |
3149 | return 1; | |
3150 | ||
3151 | return 0; | |
3152 | } | |
3153 | ||
3154 | ||
17c2559c MV |
3155 | int wpa_sm_ocv_enabled(struct wpa_sm *sm) |
3156 | { | |
3157 | struct wpa_ie_data rsn; | |
3158 | ||
3159 | if (!sm->ocv || !sm->ap_rsn_ie) | |
3160 | return 0; | |
3161 | ||
3162 | return wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, | |
3163 | &rsn) >= 0 && | |
3164 | (rsn.capabilities & WPA_CAPABILITY_OCVC); | |
3165 | } | |
3166 | ||
3167 | ||
6fc6879b JM |
3168 | /** |
3169 | * wpa_sm_set_assoc_wpa_ie_default - Generate own WPA/RSN IE from configuration | |
3170 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
3171 | * @wpa_ie: Pointer to buffer for WPA/RSN IE | |
3172 | * @wpa_ie_len: Pointer to the length of the wpa_ie buffer | |
3173 | * Returns: 0 on success, -1 on failure | |
3174 | */ | |
3175 | int wpa_sm_set_assoc_wpa_ie_default(struct wpa_sm *sm, u8 *wpa_ie, | |
3176 | size_t *wpa_ie_len) | |
3177 | { | |
3178 | int res; | |
3179 | ||
3180 | if (sm == NULL) | |
3181 | return -1; | |
3182 | ||
651c6a84 JM |
3183 | #ifdef CONFIG_TESTING_OPTIONS |
3184 | if (sm->test_assoc_ie) { | |
3185 | wpa_printf(MSG_DEBUG, | |
3186 | "TESTING: Replace association WPA/RSN IE"); | |
3187 | if (*wpa_ie_len < wpabuf_len(sm->test_assoc_ie)) | |
3188 | return -1; | |
3189 | os_memcpy(wpa_ie, wpabuf_head(sm->test_assoc_ie), | |
3190 | wpabuf_len(sm->test_assoc_ie)); | |
3191 | res = wpabuf_len(sm->test_assoc_ie); | |
3192 | } else | |
3193 | #endif /* CONFIG_TESTING_OPTIONS */ | |
6fc6879b JM |
3194 | res = wpa_gen_wpa_ie(sm, wpa_ie, *wpa_ie_len); |
3195 | if (res < 0) | |
3196 | return -1; | |
3197 | *wpa_ie_len = res; | |
3198 | ||
3199 | wpa_hexdump(MSG_DEBUG, "WPA: Set own WPA IE default", | |
3200 | wpa_ie, *wpa_ie_len); | |
3201 | ||
3202 | if (sm->assoc_wpa_ie == NULL) { | |
3203 | /* | |
3204 | * Make a copy of the WPA/RSN IE so that 4-Way Handshake gets | |
3205 | * the correct version of the IE even if PMKSA caching is | |
3206 | * aborted (which would remove PMKID from IE generation). | |
3207 | */ | |
a1f11e34 | 3208 | sm->assoc_wpa_ie = os_memdup(wpa_ie, *wpa_ie_len); |
6fc6879b JM |
3209 | if (sm->assoc_wpa_ie == NULL) |
3210 | return -1; | |
3211 | ||
6fc6879b | 3212 | sm->assoc_wpa_ie_len = *wpa_ie_len; |
0866ed00 JM |
3213 | } else { |
3214 | wpa_hexdump(MSG_DEBUG, | |
3215 | "WPA: Leave previously set WPA IE default", | |
3216 | sm->assoc_wpa_ie, sm->assoc_wpa_ie_len); | |
6fc6879b JM |
3217 | } |
3218 | ||
3219 | return 0; | |
3220 | } | |
3221 | ||
3222 | ||
3223 | /** | |
3224 | * wpa_sm_set_assoc_wpa_ie - Set own WPA/RSN IE from (Re)AssocReq | |
3225 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
3226 | * @ie: Pointer to IE data (starting from id) | |
3227 | * @len: IE length | |
3228 | * Returns: 0 on success, -1 on failure | |
3229 | * | |
3230 | * Inform WPA state machine about the WPA/RSN IE used in (Re)Association | |
3231 | * Request frame. The IE will be used to override the default value generated | |
3232 | * with wpa_sm_set_assoc_wpa_ie_default(). | |
3233 | */ | |
3234 | int wpa_sm_set_assoc_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len) | |
3235 | { | |
3236 | if (sm == NULL) | |
3237 | return -1; | |
3238 | ||
3239 | os_free(sm->assoc_wpa_ie); | |
3240 | if (ie == NULL || len == 0) { | |
f049052b BG |
3241 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
3242 | "WPA: clearing own WPA/RSN IE"); | |
6fc6879b JM |
3243 | sm->assoc_wpa_ie = NULL; |
3244 | sm->assoc_wpa_ie_len = 0; | |
3245 | } else { | |
3246 | wpa_hexdump(MSG_DEBUG, "WPA: set own WPA/RSN IE", ie, len); | |
a1f11e34 | 3247 | sm->assoc_wpa_ie = os_memdup(ie, len); |
6fc6879b JM |
3248 | if (sm->assoc_wpa_ie == NULL) |
3249 | return -1; | |
3250 | ||
6fc6879b JM |
3251 | sm->assoc_wpa_ie_len = len; |
3252 | } | |
3253 | ||
3254 | return 0; | |
3255 | } | |
3256 | ||
3257 | ||
6d6c8877 JM |
3258 | /** |
3259 | * wpa_sm_set_assoc_rsnxe_default - Generate own RSNXE from configuration | |
3260 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
3261 | * @rsnxe: Pointer to buffer for RSNXE | |
3262 | * @rsnxe_len: Pointer to the length of the rsne buffer | |
3263 | * Returns: 0 on success, -1 on failure | |
3264 | */ | |
3265 | int wpa_sm_set_assoc_rsnxe_default(struct wpa_sm *sm, u8 *rsnxe, | |
3266 | size_t *rsnxe_len) | |
3267 | { | |
3268 | int res; | |
3269 | ||
3270 | if (!sm) | |
3271 | return -1; | |
3272 | ||
3273 | res = wpa_gen_rsnxe(sm, rsnxe, *rsnxe_len); | |
3274 | if (res < 0) | |
3275 | return -1; | |
3276 | *rsnxe_len = res; | |
3277 | ||
3278 | wpa_hexdump(MSG_DEBUG, "RSN: Set own RSNXE default", rsnxe, *rsnxe_len); | |
3279 | ||
3280 | if (sm->assoc_rsnxe) { | |
3281 | wpa_hexdump(MSG_DEBUG, | |
3282 | "RSN: Leave previously set RSNXE default", | |
3283 | sm->assoc_rsnxe, sm->assoc_rsnxe_len); | |
3284 | } else if (*rsnxe_len > 0) { | |
3285 | /* | |
3286 | * Make a copy of the RSNXE so that 4-Way Handshake gets the | |
3287 | * correct version of the IE even if it gets changed. | |
3288 | */ | |
3289 | sm->assoc_rsnxe = os_memdup(rsnxe, *rsnxe_len); | |
3290 | if (!sm->assoc_rsnxe) | |
3291 | return -1; | |
3292 | ||
3293 | sm->assoc_rsnxe_len = *rsnxe_len; | |
3294 | } | |
3295 | ||
3296 | return 0; | |
3297 | } | |
3298 | ||
3299 | ||
3300 | /** | |
3301 | * wpa_sm_set_assoc_rsnxe - Set own RSNXE from (Re)AssocReq | |
3302 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
3303 | * @ie: Pointer to IE data (starting from id) | |
3304 | * @len: IE length | |
3305 | * Returns: 0 on success, -1 on failure | |
3306 | * | |
3307 | * Inform WPA state machine about the RSNXE used in (Re)Association Request | |
3308 | * frame. The IE will be used to override the default value generated | |
3309 | * with wpa_sm_set_assoc_rsnxe_default(). | |
3310 | */ | |
3311 | int wpa_sm_set_assoc_rsnxe(struct wpa_sm *sm, const u8 *ie, size_t len) | |
3312 | { | |
3313 | if (!sm) | |
3314 | return -1; | |
3315 | ||
3316 | os_free(sm->assoc_rsnxe); | |
3317 | if (!ie || len == 0) { | |
3318 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, | |
3319 | "RSN: clearing own RSNXE"); | |
3320 | sm->assoc_rsnxe = NULL; | |
3321 | sm->assoc_rsnxe_len = 0; | |
3322 | } else { | |
3323 | wpa_hexdump(MSG_DEBUG, "RSN: set own RSNXE", ie, len); | |
3324 | sm->assoc_rsnxe = os_memdup(ie, len); | |
3325 | if (!sm->assoc_rsnxe) | |
3326 | return -1; | |
3327 | ||
3328 | sm->assoc_rsnxe_len = len; | |
3329 | } | |
3330 | ||
3331 | return 0; | |
3332 | } | |
3333 | ||
3334 | ||
6fc6879b JM |
3335 | /** |
3336 | * wpa_sm_set_ap_wpa_ie - Set AP WPA IE from Beacon/ProbeResp | |
3337 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
3338 | * @ie: Pointer to IE data (starting from id) | |
3339 | * @len: IE length | |
3340 | * Returns: 0 on success, -1 on failure | |
3341 | * | |
3342 | * Inform WPA state machine about the WPA IE used in Beacon / Probe Response | |
3343 | * frame. | |
3344 | */ | |
3345 | int wpa_sm_set_ap_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len) | |
3346 | { | |
3347 | if (sm == NULL) | |
3348 | return -1; | |
3349 | ||
3350 | os_free(sm->ap_wpa_ie); | |
3351 | if (ie == NULL || len == 0) { | |
f049052b BG |
3352 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
3353 | "WPA: clearing AP WPA IE"); | |
6fc6879b JM |
3354 | sm->ap_wpa_ie = NULL; |
3355 | sm->ap_wpa_ie_len = 0; | |
3356 | } else { | |
3357 | wpa_hexdump(MSG_DEBUG, "WPA: set AP WPA IE", ie, len); | |
a1f11e34 | 3358 | sm->ap_wpa_ie = os_memdup(ie, len); |
6fc6879b JM |
3359 | if (sm->ap_wpa_ie == NULL) |
3360 | return -1; | |
3361 | ||
6fc6879b JM |
3362 | sm->ap_wpa_ie_len = len; |
3363 | } | |
3364 | ||
3365 | return 0; | |
3366 | } | |
3367 | ||
3368 | ||
3369 | /** | |
3370 | * wpa_sm_set_ap_rsn_ie - Set AP RSN IE from Beacon/ProbeResp | |
3371 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
3372 | * @ie: Pointer to IE data (starting from id) | |
3373 | * @len: IE length | |
3374 | * Returns: 0 on success, -1 on failure | |
3375 | * | |
3376 | * Inform WPA state machine about the RSN IE used in Beacon / Probe Response | |
3377 | * frame. | |
3378 | */ | |
3379 | int wpa_sm_set_ap_rsn_ie(struct wpa_sm *sm, const u8 *ie, size_t len) | |
3380 | { | |
3381 | if (sm == NULL) | |
3382 | return -1; | |
3383 | ||
3384 | os_free(sm->ap_rsn_ie); | |
3385 | if (ie == NULL || len == 0) { | |
f049052b BG |
3386 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
3387 | "WPA: clearing AP RSN IE"); | |
6fc6879b JM |
3388 | sm->ap_rsn_ie = NULL; |
3389 | sm->ap_rsn_ie_len = 0; | |
3390 | } else { | |
3391 | wpa_hexdump(MSG_DEBUG, "WPA: set AP RSN IE", ie, len); | |
a1f11e34 | 3392 | sm->ap_rsn_ie = os_memdup(ie, len); |
6fc6879b JM |
3393 | if (sm->ap_rsn_ie == NULL) |
3394 | return -1; | |
3395 | ||
6fc6879b JM |
3396 | sm->ap_rsn_ie_len = len; |
3397 | } | |
3398 | ||
3399 | return 0; | |
3400 | } | |
3401 | ||
3402 | ||
146889e3 JM |
3403 | /** |
3404 | * wpa_sm_set_ap_rsnxe - Set AP RSNXE from Beacon/ProbeResp | |
3405 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
3406 | * @ie: Pointer to IE data (starting from id) | |
3407 | * @len: IE length | |
3408 | * Returns: 0 on success, -1 on failure | |
3409 | * | |
3410 | * Inform WPA state machine about the RSNXE used in Beacon / Probe Response | |
3411 | * frame. | |
3412 | */ | |
3413 | int wpa_sm_set_ap_rsnxe(struct wpa_sm *sm, const u8 *ie, size_t len) | |
3414 | { | |
3415 | if (!sm) | |
3416 | return -1; | |
3417 | ||
3418 | os_free(sm->ap_rsnxe); | |
3419 | if (!ie || len == 0) { | |
3420 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: clearing AP RSNXE"); | |
3421 | sm->ap_rsnxe = NULL; | |
3422 | sm->ap_rsnxe_len = 0; | |
3423 | } else { | |
3424 | wpa_hexdump(MSG_DEBUG, "WPA: set AP RSNXE", ie, len); | |
3425 | sm->ap_rsnxe = os_memdup(ie, len); | |
3426 | if (!sm->ap_rsnxe) | |
3427 | return -1; | |
3428 | ||
3429 | sm->ap_rsnxe_len = len; | |
3430 | } | |
3431 | ||
3432 | return 0; | |
3433 | } | |
3434 | ||
3435 | ||
6fc6879b JM |
3436 | /** |
3437 | * wpa_sm_parse_own_wpa_ie - Parse own WPA/RSN IE | |
3438 | * @sm: Pointer to WPA state machine data from wpa_sm_init() | |
3439 | * @data: Pointer to data area for parsing results | |
3440 | * Returns: 0 on success, -1 if IE is not known, or -2 on parsing failure | |
3441 | * | |
3442 | * Parse the contents of the own WPA or RSN IE from (Re)AssocReq and write the | |
3443 | * parsed data into data. | |
3444 | */ | |
3445 | int wpa_sm_parse_own_wpa_ie(struct wpa_sm *sm, struct wpa_ie_data *data) | |
3446 | { | |
2a522e71 JM |
3447 | if (sm == NULL) |
3448 | return -1; | |
3449 | ||
3450 | if (sm->assoc_wpa_ie == NULL) { | |
f049052b BG |
3451 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, |
3452 | "WPA: No WPA/RSN IE available from association info"); | |
6fc6879b JM |
3453 | return -1; |
3454 | } | |
3455 | if (wpa_parse_wpa_ie(sm->assoc_wpa_ie, sm->assoc_wpa_ie_len, data)) | |
3456 | return -2; | |
3457 | return 0; | |
3458 | } | |
540264a7 JM |
3459 | |
3460 | ||
3461 | int wpa_sm_pmksa_cache_list(struct wpa_sm *sm, char *buf, size_t len) | |
3462 | { | |
540264a7 | 3463 | return pmksa_cache_list(sm->pmksa, buf, len); |
540264a7 | 3464 | } |
32d5295f JM |
3465 | |
3466 | ||
3459381d JM |
3467 | struct rsn_pmksa_cache_entry * wpa_sm_pmksa_cache_head(struct wpa_sm *sm) |
3468 | { | |
3469 | return pmksa_cache_head(sm->pmksa); | |
3470 | } | |
3471 | ||
3472 | ||
3473 | struct rsn_pmksa_cache_entry * | |
3474 | wpa_sm_pmksa_cache_add_entry(struct wpa_sm *sm, | |
3475 | struct rsn_pmksa_cache_entry * entry) | |
3476 | { | |
3477 | return pmksa_cache_add_entry(sm->pmksa, entry); | |
3478 | } | |
3479 | ||
3480 | ||
f705f41b VK |
3481 | void wpa_sm_pmksa_cache_add(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len, |
3482 | const u8 *pmkid, const u8 *bssid, | |
3483 | const u8 *fils_cache_id) | |
3484 | { | |
3485 | sm->cur_pmksa = pmksa_cache_add(sm->pmksa, pmk, pmk_len, pmkid, NULL, 0, | |
3486 | bssid, sm->own_addr, sm->network_ctx, | |
3487 | sm->key_mgmt, fils_cache_id); | |
3488 | } | |
3489 | ||
3490 | ||
567da5bb JM |
3491 | int wpa_sm_pmksa_exists(struct wpa_sm *sm, const u8 *bssid, |
3492 | const void *network_ctx) | |
3493 | { | |
852b2f27 | 3494 | return pmksa_cache_get(sm->pmksa, bssid, NULL, network_ctx, 0) != NULL; |
567da5bb JM |
3495 | } |
3496 | ||
3497 | ||
32d5295f JM |
3498 | void wpa_sm_drop_sa(struct wpa_sm *sm) |
3499 | { | |
f049052b | 3500 | wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PMK and PTK"); |
32d5295f JM |
3501 | sm->ptk_set = 0; |
3502 | sm->tptk_set = 0; | |
1bd13110 | 3503 | sm->pmk_len = 0; |
32d5295f JM |
3504 | os_memset(sm->pmk, 0, sizeof(sm->pmk)); |
3505 | os_memset(&sm->ptk, 0, sizeof(sm->ptk)); | |
3506 | os_memset(&sm->tptk, 0, sizeof(sm->tptk)); | |
cb5132bb | 3507 | os_memset(&sm->gtk, 0, sizeof(sm->gtk)); |
87e2db16 | 3508 | os_memset(&sm->gtk_wnm_sleep, 0, sizeof(sm->gtk_wnm_sleep)); |
cb5132bb | 3509 | os_memset(&sm->igtk, 0, sizeof(sm->igtk)); |
87e2db16 | 3510 | os_memset(&sm->igtk_wnm_sleep, 0, sizeof(sm->igtk_wnm_sleep)); |
71932544 JM |
3511 | #ifdef CONFIG_IEEE80211R |
3512 | os_memset(sm->xxkey, 0, sizeof(sm->xxkey)); | |
a3e18dbb | 3513 | sm->xxkey_len = 0; |
71932544 | 3514 | os_memset(sm->pmk_r0, 0, sizeof(sm->pmk_r0)); |
a3e18dbb | 3515 | sm->pmk_r0_len = 0; |
71932544 | 3516 | os_memset(sm->pmk_r1, 0, sizeof(sm->pmk_r1)); |
a3e18dbb | 3517 | sm->pmk_r1_len = 0; |
71932544 | 3518 | #endif /* CONFIG_IEEE80211R */ |
32d5295f | 3519 | } |
0d7b4409 JM |
3520 | |
3521 | ||
3522 | int wpa_sm_has_ptk(struct wpa_sm *sm) | |
3523 | { | |
3524 | if (sm == NULL) | |
3525 | return 0; | |
3526 | return sm->ptk_set; | |
3527 | } | |
b14a210c JB |
3528 | |
3529 | ||
a79ed068 MT |
3530 | int wpa_sm_has_ptk_installed(struct wpa_sm *sm) |
3531 | { | |
3532 | if (!sm) | |
3533 | return 0; | |
3534 | return sm->ptk.installed; | |
3535 | } | |
3536 | ||
3537 | ||
b14a210c JB |
3538 | void wpa_sm_update_replay_ctr(struct wpa_sm *sm, const u8 *replay_ctr) |
3539 | { | |
3540 | os_memcpy(sm->rx_replay_counter, replay_ctr, WPA_REPLAY_COUNTER_LEN); | |
3541 | } | |
d8a790b9 JM |
3542 | |
3543 | ||
3544 | void wpa_sm_pmksa_cache_flush(struct wpa_sm *sm, void *network_ctx) | |
3545 | { | |
4033935d | 3546 | pmksa_cache_flush(sm->pmksa, network_ctx, NULL, 0); |
d8a790b9 | 3547 | } |
75cad1a0 XC |
3548 | |
3549 | ||
ad3872a3 | 3550 | #ifdef CONFIG_WNM |
75cad1a0 XC |
3551 | int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 subelem_id, u8 *buf) |
3552 | { | |
75cad1a0 XC |
3553 | u16 keyinfo; |
3554 | u8 keylen; /* plaintext key len */ | |
75cad1a0 XC |
3555 | u8 *key_rsc; |
3556 | ||
75cad1a0 | 3557 | if (subelem_id == WNM_SLEEP_SUBELEM_GTK) { |
d2c33b91 JM |
3558 | struct wpa_gtk_data gd; |
3559 | ||
3560 | os_memset(&gd, 0, sizeof(gd)); | |
3561 | keylen = wpa_cipher_key_len(sm->group_cipher); | |
3562 | gd.key_rsc_len = wpa_cipher_rsc_len(sm->group_cipher); | |
3563 | gd.alg = wpa_cipher_to_alg(sm->group_cipher); | |
3564 | if (gd.alg == WPA_ALG_NONE) { | |
3565 | wpa_printf(MSG_DEBUG, "Unsupported group cipher suite"); | |
3566 | return -1; | |
3567 | } | |
3568 | ||
75cad1a0 | 3569 | key_rsc = buf + 5; |
68db9ab0 | 3570 | keyinfo = WPA_GET_LE16(buf + 2); |
75cad1a0 XC |
3571 | gd.gtk_len = keylen; |
3572 | if (gd.gtk_len != buf[4]) { | |
3573 | wpa_printf(MSG_DEBUG, "GTK len mismatch len %d vs %d", | |
3574 | gd.gtk_len, buf[4]); | |
3575 | return -1; | |
3576 | } | |
3577 | gd.keyidx = keyinfo & 0x03; /* B0 - B1 */ | |
3578 | gd.tx = wpa_supplicant_gtk_tx_bit_workaround( | |
3579 | sm, !!(keyinfo & WPA_KEY_INFO_TXRX)); | |
3580 | ||
68db9ab0 | 3581 | os_memcpy(gd.gtk, buf + 13, gd.gtk_len); |
75cad1a0 XC |
3582 | |
3583 | wpa_hexdump_key(MSG_DEBUG, "Install GTK (WNM SLEEP)", | |
3584 | gd.gtk, gd.gtk_len); | |
87e2db16 | 3585 | if (wpa_supplicant_install_gtk(sm, &gd, key_rsc, 1)) { |
31bc66e4 | 3586 | forced_memzero(&gd, sizeof(gd)); |
75cad1a0 XC |
3587 | wpa_printf(MSG_DEBUG, "Failed to install the GTK in " |
3588 | "WNM mode"); | |
3589 | return -1; | |
3590 | } | |
31bc66e4 | 3591 | forced_memzero(&gd, sizeof(gd)); |
75cad1a0 | 3592 | } else if (subelem_id == WNM_SLEEP_SUBELEM_IGTK) { |
cb5132bb MV |
3593 | const struct wpa_igtk_kde *igtk; |
3594 | ||
3595 | igtk = (const struct wpa_igtk_kde *) (buf + 2); | |
87e2db16 | 3596 | if (wpa_supplicant_install_igtk(sm, igtk, 1) < 0) |
75cad1a0 | 3597 | return -1; |
75cad1a0 XC |
3598 | } else { |
3599 | wpa_printf(MSG_DEBUG, "Unknown element id"); | |
3600 | return -1; | |
3601 | } | |
3602 | ||
3603 | return 0; | |
3604 | } | |
ad3872a3 | 3605 | #endif /* CONFIG_WNM */ |
db76aa64 JM |
3606 | |
3607 | ||
25ef8529 JM |
3608 | #ifdef CONFIG_P2P |
3609 | ||
3610 | int wpa_sm_get_p2p_ip_addr(struct wpa_sm *sm, u8 *buf) | |
3611 | { | |
3612 | if (sm == NULL || WPA_GET_BE32(sm->p2p_ip_addr) == 0) | |
3613 | return -1; | |
3614 | os_memcpy(buf, sm->p2p_ip_addr, 3 * 4); | |
3615 | return 0; | |
3616 | } | |
3617 | ||
3618 | #endif /* CONFIG_P2P */ | |
b41f2684 CL |
3619 | |
3620 | ||
3621 | void wpa_sm_set_rx_replay_ctr(struct wpa_sm *sm, const u8 *rx_replay_counter) | |
3622 | { | |
3623 | if (rx_replay_counter == NULL) | |
3624 | return; | |
3625 | ||
3626 | os_memcpy(sm->rx_replay_counter, rx_replay_counter, | |
3627 | WPA_REPLAY_COUNTER_LEN); | |
3628 | sm->rx_replay_counter_set = 1; | |
3629 | wpa_printf(MSG_DEBUG, "Updated key replay counter"); | |
3630 | } | |
3631 | ||
3632 | ||
98cd3d1c JM |
3633 | void wpa_sm_set_ptk_kck_kek(struct wpa_sm *sm, |
3634 | const u8 *ptk_kck, size_t ptk_kck_len, | |
3635 | const u8 *ptk_kek, size_t ptk_kek_len) | |
b41f2684 | 3636 | { |
98cd3d1c JM |
3637 | if (ptk_kck && ptk_kck_len <= WPA_KCK_MAX_LEN) { |
3638 | os_memcpy(sm->ptk.kck, ptk_kck, ptk_kck_len); | |
3639 | sm->ptk.kck_len = ptk_kck_len; | |
b41f2684 CL |
3640 | wpa_printf(MSG_DEBUG, "Updated PTK KCK"); |
3641 | } | |
98cd3d1c JM |
3642 | if (ptk_kek && ptk_kek_len <= WPA_KEK_MAX_LEN) { |
3643 | os_memcpy(sm->ptk.kek, ptk_kek, ptk_kek_len); | |
3644 | sm->ptk.kek_len = ptk_kek_len; | |
b41f2684 CL |
3645 | wpa_printf(MSG_DEBUG, "Updated PTK KEK"); |
3646 | } | |
3647 | sm->ptk_set = 1; | |
3648 | } | |
651c6a84 JM |
3649 | |
3650 | ||
3651 | #ifdef CONFIG_TESTING_OPTIONS | |
bb06748f | 3652 | |
651c6a84 JM |
3653 | void wpa_sm_set_test_assoc_ie(struct wpa_sm *sm, struct wpabuf *buf) |
3654 | { | |
3655 | wpabuf_free(sm->test_assoc_ie); | |
3656 | sm->test_assoc_ie = buf; | |
3657 | } | |
bb06748f JM |
3658 | |
3659 | ||
3660 | const u8 * wpa_sm_get_anonce(struct wpa_sm *sm) | |
3661 | { | |
3662 | return sm->anonce; | |
3663 | } | |
3664 | ||
651c6a84 | 3665 | #endif /* CONFIG_TESTING_OPTIONS */ |
f00b9b88 JM |
3666 | |
3667 | ||
3dc3afe2 AM |
3668 | unsigned int wpa_sm_get_key_mgmt(struct wpa_sm *sm) |
3669 | { | |
3670 | return sm->key_mgmt; | |
3671 | } | |
3672 | ||
3673 | ||
f00b9b88 JM |
3674 | #ifdef CONFIG_FILS |
3675 | ||
af3e362f | 3676 | struct wpabuf * fils_build_auth(struct wpa_sm *sm, int dh_group, const u8 *md) |
f00b9b88 JM |
3677 | { |
3678 | struct wpabuf *buf = NULL; | |
3679 | struct wpabuf *erp_msg; | |
76e20f4f | 3680 | struct wpabuf *pub = NULL; |
f00b9b88 JM |
3681 | |
3682 | erp_msg = eapol_sm_build_erp_reauth_start(sm->eapol); | |
3683 | if (!erp_msg && !sm->cur_pmksa) { | |
3684 | wpa_printf(MSG_DEBUG, | |
3685 | "FILS: Neither ERP EAP-Initiate/Re-auth nor PMKSA cache entry is available - skip FILS"); | |
3686 | goto fail; | |
3687 | } | |
3688 | ||
3689 | wpa_printf(MSG_DEBUG, "FILS: Try to use FILS (erp=%d pmksa_cache=%d)", | |
3690 | erp_msg != NULL, sm->cur_pmksa != NULL); | |
3691 | ||
706df429 JM |
3692 | sm->fils_completed = 0; |
3693 | ||
f00b9b88 JM |
3694 | if (!sm->assoc_wpa_ie) { |
3695 | wpa_printf(MSG_INFO, "FILS: No own RSN IE set for FILS"); | |
3696 | goto fail; | |
3697 | } | |
3698 | ||
3699 | if (random_get_bytes(sm->fils_nonce, FILS_NONCE_LEN) < 0 || | |
3700 | random_get_bytes(sm->fils_session, FILS_SESSION_LEN) < 0) | |
3701 | goto fail; | |
3702 | ||
3703 | wpa_hexdump(MSG_DEBUG, "FILS: Generated FILS Nonce", | |
3704 | sm->fils_nonce, FILS_NONCE_LEN); | |
3705 | wpa_hexdump(MSG_DEBUG, "FILS: Generated FILS Session", | |
3706 | sm->fils_session, FILS_SESSION_LEN); | |
3707 | ||
76e20f4f JM |
3708 | #ifdef CONFIG_FILS_SK_PFS |
3709 | sm->fils_dh_group = dh_group; | |
3710 | if (dh_group) { | |
3711 | crypto_ecdh_deinit(sm->fils_ecdh); | |
3712 | sm->fils_ecdh = crypto_ecdh_init(dh_group); | |
3713 | if (!sm->fils_ecdh) { | |
3714 | wpa_printf(MSG_INFO, | |
3715 | "FILS: Could not initialize ECDH with group %d", | |
3716 | dh_group); | |
3717 | goto fail; | |
3718 | } | |
3719 | pub = crypto_ecdh_get_pubkey(sm->fils_ecdh, 1); | |
3720 | if (!pub) | |
3721 | goto fail; | |
3722 | wpa_hexdump_buf(MSG_DEBUG, "FILS: Element (DH public key)", | |
3723 | pub); | |
3724 | sm->fils_dh_elem_len = wpabuf_len(pub); | |
3725 | } | |
3726 | #endif /* CONFIG_FILS_SK_PFS */ | |
3727 | ||
3728 | buf = wpabuf_alloc(1000 + sm->assoc_wpa_ie_len + | |
3729 | (pub ? wpabuf_len(pub) : 0)); | |
f00b9b88 JM |
3730 | if (!buf) |
3731 | goto fail; | |
3732 | ||
3733 | /* Fields following the Authentication algorithm number field */ | |
3734 | ||
3735 | /* Authentication Transaction seq# */ | |
3736 | wpabuf_put_le16(buf, 1); | |
3737 | ||
3738 | /* Status Code */ | |
3739 | wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS); | |
3740 | ||
76e20f4f JM |
3741 | /* TODO: FILS PK */ |
3742 | #ifdef CONFIG_FILS_SK_PFS | |
3743 | if (dh_group) { | |
3744 | /* Finite Cyclic Group */ | |
3745 | wpabuf_put_le16(buf, dh_group); | |
3746 | /* Element */ | |
3747 | wpabuf_put_buf(buf, pub); | |
3748 | } | |
3749 | #endif /* CONFIG_FILS_SK_PFS */ | |
f00b9b88 JM |
3750 | |
3751 | /* RSNE */ | |
3752 | wpa_hexdump(MSG_DEBUG, "FILS: RSNE in FILS Authentication frame", | |
3753 | sm->assoc_wpa_ie, sm->assoc_wpa_ie_len); | |
3754 | wpabuf_put_data(buf, sm->assoc_wpa_ie, sm->assoc_wpa_ie_len); | |
3755 | ||
af3e362f JM |
3756 | if (md) { |
3757 | /* MDE when using FILS for FT initial association */ | |
3758 | struct rsn_mdie *mdie; | |
3759 | ||
3760 | wpabuf_put_u8(buf, WLAN_EID_MOBILITY_DOMAIN); | |
3761 | wpabuf_put_u8(buf, sizeof(*mdie)); | |
3762 | mdie = wpabuf_put(buf, sizeof(*mdie)); | |
3763 | os_memcpy(mdie->mobility_domain, md, MOBILITY_DOMAIN_ID_LEN); | |
3764 | mdie->ft_capab = 0; | |
3765 | } | |
f00b9b88 JM |
3766 | |
3767 | /* FILS Nonce */ | |
3768 | wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */ | |
3769 | wpabuf_put_u8(buf, 1 + FILS_NONCE_LEN); /* Length */ | |
3770 | /* Element ID Extension */ | |
3771 | wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_NONCE); | |
3772 | wpabuf_put_data(buf, sm->fils_nonce, FILS_NONCE_LEN); | |
3773 | ||
3774 | /* FILS Session */ | |
3775 | wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */ | |
3776 | wpabuf_put_u8(buf, 1 + FILS_SESSION_LEN); /* Length */ | |
3777 | /* Element ID Extension */ | |
3778 | wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_SESSION); | |
3779 | wpabuf_put_data(buf, sm->fils_session, FILS_SESSION_LEN); | |
3780 | ||
3781 | /* FILS Wrapped Data */ | |
fcd3d6ce | 3782 | sm->fils_erp_pmkid_set = 0; |
f00b9b88 JM |
3783 | if (erp_msg) { |
3784 | wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */ | |
3785 | wpabuf_put_u8(buf, 1 + wpabuf_len(erp_msg)); /* Length */ | |
3786 | /* Element ID Extension */ | |
3787 | wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_WRAPPED_DATA); | |
3788 | wpabuf_put_buf(buf, erp_msg); | |
fcd3d6ce JM |
3789 | /* Calculate pending PMKID here so that we do not need to |
3790 | * maintain a copy of the EAP-Initiate/Reauth message. */ | |
3791 | if (fils_pmkid_erp(sm->key_mgmt, wpabuf_head(erp_msg), | |
3792 | wpabuf_len(erp_msg), | |
3793 | sm->fils_erp_pmkid) == 0) | |
3794 | sm->fils_erp_pmkid_set = 1; | |
f00b9b88 JM |
3795 | } |
3796 | ||
3797 | wpa_hexdump_buf(MSG_DEBUG, "RSN: FILS fields for Authentication frame", | |
3798 | buf); | |
3799 | ||
3800 | fail: | |
3801 | wpabuf_free(erp_msg); | |
76e20f4f | 3802 | wpabuf_free(pub); |
f00b9b88 JM |
3803 | return buf; |
3804 | } | |
3805 | ||
a6609937 | 3806 | |
ba9774bd JM |
3807 | int fils_process_auth(struct wpa_sm *sm, const u8 *bssid, const u8 *data, |
3808 | size_t len) | |
a6609937 JM |
3809 | { |
3810 | const u8 *pos, *end; | |
3811 | struct ieee802_11_elems elems; | |
3812 | struct wpa_ie_data rsn; | |
3813 | int pmkid_match = 0; | |
3814 | u8 ick[FILS_ICK_MAX_LEN]; | |
3815 | size_t ick_len; | |
3816 | int res; | |
76e20f4f | 3817 | struct wpabuf *dh_ss = NULL; |
e6b62313 JM |
3818 | const u8 *g_sta = NULL; |
3819 | size_t g_sta_len = 0; | |
3820 | const u8 *g_ap = NULL; | |
3821 | size_t g_ap_len = 0; | |
3822 | struct wpabuf *pub = NULL; | |
a6609937 | 3823 | |
ba9774bd JM |
3824 | os_memcpy(sm->bssid, bssid, ETH_ALEN); |
3825 | ||
a6609937 JM |
3826 | wpa_hexdump(MSG_DEBUG, "FILS: Authentication frame fields", |
3827 | data, len); | |
3828 | pos = data; | |
3829 | end = data + len; | |
3830 | ||
76e20f4f JM |
3831 | /* TODO: FILS PK */ |
3832 | #ifdef CONFIG_FILS_SK_PFS | |
3833 | if (sm->fils_dh_group) { | |
3834 | u16 group; | |
3835 | ||
3836 | /* Using FILS PFS */ | |
3837 | ||
3838 | /* Finite Cyclic Group */ | |
3839 | if (end - pos < 2) { | |
3840 | wpa_printf(MSG_DEBUG, | |
3841 | "FILS: No room for Finite Cyclic Group"); | |
3842 | goto fail; | |
3843 | } | |
3844 | group = WPA_GET_LE16(pos); | |
3845 | pos += 2; | |
3846 | if (group != sm->fils_dh_group) { | |
3847 | wpa_printf(MSG_DEBUG, | |
3848 | "FILS: Unexpected change in Finite Cyclic Group: %u (expected %u)", | |
3849 | group, sm->fils_dh_group); | |
3850 | goto fail; | |
3851 | } | |
3852 | ||
3853 | /* Element */ | |
3854 | if ((size_t) (end - pos) < sm->fils_dh_elem_len) { | |
3855 | wpa_printf(MSG_DEBUG, "FILS: No room for Element"); | |
3856 | goto fail; | |
3857 | } | |
3858 | ||
3859 | if (!sm->fils_ecdh) { | |
3860 | wpa_printf(MSG_DEBUG, "FILS: No ECDH state available"); | |
3861 | goto fail; | |
3862 | } | |
3863 | dh_ss = crypto_ecdh_set_peerkey(sm->fils_ecdh, 1, pos, | |
3864 | sm->fils_dh_elem_len); | |
3865 | if (!dh_ss) { | |
3866 | wpa_printf(MSG_DEBUG, "FILS: ECDH operation failed"); | |
3867 | goto fail; | |
3868 | } | |
3869 | wpa_hexdump_buf_key(MSG_DEBUG, "FILS: DH_SS", dh_ss); | |
e6b62313 JM |
3870 | g_ap = pos; |
3871 | g_ap_len = sm->fils_dh_elem_len; | |
76e20f4f JM |
3872 | pos += sm->fils_dh_elem_len; |
3873 | } | |
3874 | #endif /* CONFIG_FILS_SK_PFS */ | |
a6609937 JM |
3875 | |
3876 | wpa_hexdump(MSG_DEBUG, "FILS: Remaining IEs", pos, end - pos); | |
3877 | if (ieee802_11_parse_elems(pos, end - pos, &elems, 1) == ParseFailed) { | |
3878 | wpa_printf(MSG_DEBUG, "FILS: Could not parse elements"); | |
76e20f4f | 3879 | goto fail; |
a6609937 JM |
3880 | } |
3881 | ||
3882 | /* RSNE */ | |
3883 | wpa_hexdump(MSG_DEBUG, "FILS: RSN element", elems.rsn_ie, | |
3884 | elems.rsn_ie_len); | |
3885 | if (!elems.rsn_ie || | |
3886 | wpa_parse_wpa_ie_rsn(elems.rsn_ie - 2, elems.rsn_ie_len + 2, | |
3887 | &rsn) < 0) { | |
3888 | wpa_printf(MSG_DEBUG, "FILS: No RSN element"); | |
76e20f4f | 3889 | goto fail; |
a6609937 JM |
3890 | } |
3891 | ||
3892 | if (!elems.fils_nonce) { | |
3893 | wpa_printf(MSG_DEBUG, "FILS: No FILS Nonce field"); | |
76e20f4f | 3894 | goto fail; |
a6609937 JM |
3895 | } |
3896 | os_memcpy(sm->fils_anonce, elems.fils_nonce, FILS_NONCE_LEN); | |
3897 | wpa_hexdump(MSG_DEBUG, "FILS: ANonce", sm->fils_anonce, FILS_NONCE_LEN); | |
3898 | ||
d555c39c | 3899 | #ifdef CONFIG_IEEE80211R |
7d440a3b JM |
3900 | if (wpa_key_mgmt_ft(sm->key_mgmt)) { |
3901 | struct wpa_ft_ies parse; | |
3902 | ||
3903 | if (!elems.mdie || !elems.ftie) { | |
3904 | wpa_printf(MSG_DEBUG, "FILS+FT: No MDE or FTE"); | |
3905 | goto fail; | |
3906 | } | |
3907 | ||
9a33737a JM |
3908 | if (wpa_ft_parse_ies(pos, end - pos, &parse, |
3909 | wpa_key_mgmt_sha384(sm->key_mgmt)) < 0) { | |
7d440a3b JM |
3910 | wpa_printf(MSG_DEBUG, "FILS+FT: Failed to parse IEs"); |
3911 | goto fail; | |
3912 | } | |
3913 | ||
3914 | if (!parse.r0kh_id) { | |
3915 | wpa_printf(MSG_DEBUG, | |
3916 | "FILS+FT: No R0KH-ID subelem in FTE"); | |
3917 | goto fail; | |
3918 | } | |
3919 | os_memcpy(sm->r0kh_id, parse.r0kh_id, parse.r0kh_id_len); | |
3920 | sm->r0kh_id_len = parse.r0kh_id_len; | |
3921 | wpa_hexdump_ascii(MSG_DEBUG, "FILS+FT: R0KH-ID", | |
3922 | sm->r0kh_id, sm->r0kh_id_len); | |
3923 | ||
3924 | if (!parse.r1kh_id) { | |
3925 | wpa_printf(MSG_DEBUG, | |
3926 | "FILS+FT: No R1KH-ID subelem in FTE"); | |
3927 | goto fail; | |
3928 | } | |
3929 | os_memcpy(sm->r1kh_id, parse.r1kh_id, FT_R1KH_ID_LEN); | |
3930 | wpa_hexdump(MSG_DEBUG, "FILS+FT: R1KH-ID", | |
3931 | sm->r1kh_id, FT_R1KH_ID_LEN); | |
3932 | ||
3933 | /* TODO: Check MDE and FTE payload */ | |
3934 | ||
3935 | wpabuf_free(sm->fils_ft_ies); | |
3936 | sm->fils_ft_ies = wpabuf_alloc(2 + elems.mdie_len + | |
3937 | 2 + elems.ftie_len); | |
3938 | if (!sm->fils_ft_ies) | |
3939 | goto fail; | |
3940 | wpabuf_put_data(sm->fils_ft_ies, elems.mdie - 2, | |
3941 | 2 + elems.mdie_len); | |
3942 | wpabuf_put_data(sm->fils_ft_ies, elems.ftie - 2, | |
3943 | 2 + elems.ftie_len); | |
3944 | } else { | |
3945 | wpabuf_free(sm->fils_ft_ies); | |
3946 | sm->fils_ft_ies = NULL; | |
3947 | } | |
d555c39c | 3948 | #endif /* CONFIG_IEEE80211R */ |
a6609937 JM |
3949 | |
3950 | /* PMKID List */ | |
3951 | if (rsn.pmkid && rsn.num_pmkid > 0) { | |
3952 | wpa_hexdump(MSG_DEBUG, "FILS: PMKID List", | |
3953 | rsn.pmkid, rsn.num_pmkid * PMKID_LEN); | |
3954 | ||
3955 | if (rsn.num_pmkid != 1) { | |
3956 | wpa_printf(MSG_DEBUG, "FILS: Invalid PMKID selection"); | |
76e20f4f | 3957 | goto fail; |
a6609937 JM |
3958 | } |
3959 | wpa_hexdump(MSG_DEBUG, "FILS: PMKID", rsn.pmkid, PMKID_LEN); | |
3960 | if (os_memcmp(sm->cur_pmksa->pmkid, rsn.pmkid, PMKID_LEN) != 0) | |
3961 | { | |
3962 | wpa_printf(MSG_DEBUG, "FILS: PMKID mismatch"); | |
3963 | wpa_hexdump(MSG_DEBUG, "FILS: Expected PMKID", | |
3964 | sm->cur_pmksa->pmkid, PMKID_LEN); | |
76e20f4f | 3965 | goto fail; |
a6609937 JM |
3966 | } |
3967 | wpa_printf(MSG_DEBUG, | |
3968 | "FILS: Matching PMKID - continue using PMKSA caching"); | |
3969 | pmkid_match = 1; | |
3970 | } | |
3971 | if (!pmkid_match && sm->cur_pmksa) { | |
3972 | wpa_printf(MSG_DEBUG, | |
3973 | "FILS: No PMKID match - cannot use cached PMKSA entry"); | |
3974 | sm->cur_pmksa = NULL; | |
3975 | } | |
3976 | ||
3977 | /* FILS Session */ | |
3978 | if (!elems.fils_session) { | |
3979 | wpa_printf(MSG_DEBUG, "FILS: No FILS Session element"); | |
76e20f4f | 3980 | goto fail; |
a6609937 JM |
3981 | } |
3982 | wpa_hexdump(MSG_DEBUG, "FILS: FILS Session", elems.fils_session, | |
3983 | FILS_SESSION_LEN); | |
3984 | if (os_memcmp(sm->fils_session, elems.fils_session, FILS_SESSION_LEN) | |
3985 | != 0) { | |
3986 | wpa_printf(MSG_DEBUG, "FILS: Session mismatch"); | |
3987 | wpa_hexdump(MSG_DEBUG, "FILS: Expected FILS Session", | |
3988 | sm->fils_session, FILS_SESSION_LEN); | |
76e20f4f | 3989 | goto fail; |
a6609937 JM |
3990 | } |
3991 | ||
3992 | /* FILS Wrapped Data */ | |
3993 | if (!sm->cur_pmksa && elems.fils_wrapped_data) { | |
fcd3d6ce JM |
3994 | u8 rmsk[ERP_MAX_KEY_LEN]; |
3995 | size_t rmsk_len; | |
3996 | ||
a6609937 JM |
3997 | wpa_hexdump(MSG_DEBUG, "FILS: Wrapped Data", |
3998 | elems.fils_wrapped_data, | |
3999 | elems.fils_wrapped_data_len); | |
4000 | eapol_sm_process_erp_finish(sm->eapol, elems.fils_wrapped_data, | |
4001 | elems.fils_wrapped_data_len); | |
4002 | if (eapol_sm_failed(sm->eapol)) | |
76e20f4f | 4003 | goto fail; |
a6609937 | 4004 | |
fcd3d6ce JM |
4005 | rmsk_len = ERP_MAX_KEY_LEN; |
4006 | res = eapol_sm_get_key(sm->eapol, rmsk, rmsk_len); | |
4007 | if (res == PMK_LEN) { | |
4008 | rmsk_len = PMK_LEN; | |
4009 | res = eapol_sm_get_key(sm->eapol, rmsk, rmsk_len); | |
4010 | } | |
a6609937 | 4011 | if (res) |
76e20f4f | 4012 | goto fail; |
a6609937 | 4013 | |
fcd3d6ce | 4014 | res = fils_rmsk_to_pmk(sm->key_mgmt, rmsk, rmsk_len, |
76e20f4f JM |
4015 | sm->fils_nonce, sm->fils_anonce, |
4016 | dh_ss ? wpabuf_head(dh_ss) : NULL, | |
4017 | dh_ss ? wpabuf_len(dh_ss) : 0, | |
fcd3d6ce | 4018 | sm->pmk, &sm->pmk_len); |
31bc66e4 | 4019 | forced_memzero(rmsk, sizeof(rmsk)); |
4cada9dc JM |
4020 | |
4021 | /* Don't use DHss in PTK derivation if PMKSA caching is not | |
4022 | * used. */ | |
76e20f4f JM |
4023 | wpabuf_clear_free(dh_ss); |
4024 | dh_ss = NULL; | |
4cada9dc | 4025 | |
275cc942 | 4026 | if (res) |
76e20f4f | 4027 | goto fail; |
fcd3d6ce JM |
4028 | |
4029 | if (!sm->fils_erp_pmkid_set) { | |
4030 | wpa_printf(MSG_DEBUG, "FILS: PMKID not available"); | |
76e20f4f | 4031 | goto fail; |
fcd3d6ce JM |
4032 | } |
4033 | wpa_hexdump(MSG_DEBUG, "FILS: PMKID", sm->fils_erp_pmkid, | |
4034 | PMKID_LEN); | |
a6609937 | 4035 | wpa_printf(MSG_DEBUG, "FILS: ERP processing succeeded - add PMKSA cache entry for the result"); |
fcd3d6ce JM |
4036 | sm->cur_pmksa = pmksa_cache_add(sm->pmksa, sm->pmk, sm->pmk_len, |
4037 | sm->fils_erp_pmkid, NULL, 0, | |
4038 | sm->bssid, sm->own_addr, | |
869af307 JM |
4039 | sm->network_ctx, sm->key_mgmt, |
4040 | NULL); | |
a6609937 JM |
4041 | } |
4042 | ||
4043 | if (!sm->cur_pmksa) { | |
4044 | wpa_printf(MSG_DEBUG, | |
4045 | "FILS: No remaining options to continue FILS authentication"); | |
76e20f4f | 4046 | goto fail; |
a6609937 JM |
4047 | } |
4048 | ||
4049 | if (fils_pmk_to_ptk(sm->pmk, sm->pmk_len, sm->own_addr, sm->bssid, | |
4cada9dc JM |
4050 | sm->fils_nonce, sm->fils_anonce, |
4051 | dh_ss ? wpabuf_head(dh_ss) : NULL, | |
4052 | dh_ss ? wpabuf_len(dh_ss) : 0, | |
4053 | &sm->ptk, ick, &ick_len, | |
4054 | sm->key_mgmt, sm->pairwise_cipher, | |
7d440a3b | 4055 | sm->fils_ft, &sm->fils_ft_len) < 0) { |
a6609937 | 4056 | wpa_printf(MSG_DEBUG, "FILS: Failed to derive PTK"); |
76e20f4f | 4057 | goto fail; |
a6609937 | 4058 | } |
4cada9dc JM |
4059 | |
4060 | wpabuf_clear_free(dh_ss); | |
4061 | dh_ss = NULL; | |
4062 | ||
a6609937 JM |
4063 | sm->ptk_set = 1; |
4064 | sm->tptk_set = 0; | |
4065 | os_memset(&sm->tptk, 0, sizeof(sm->tptk)); | |
4066 | ||
e6b62313 JM |
4067 | #ifdef CONFIG_FILS_SK_PFS |
4068 | if (sm->fils_dh_group) { | |
4069 | if (!sm->fils_ecdh) { | |
4070 | wpa_printf(MSG_INFO, "FILS: ECDH not initialized"); | |
4071 | goto fail; | |
4072 | } | |
4073 | pub = crypto_ecdh_get_pubkey(sm->fils_ecdh, 1); | |
4074 | if (!pub) | |
4075 | goto fail; | |
4076 | wpa_hexdump_buf(MSG_DEBUG, "FILS: gSTA", pub); | |
4077 | g_sta = wpabuf_head(pub); | |
4078 | g_sta_len = wpabuf_len(pub); | |
4079 | if (!g_ap) { | |
4080 | wpa_printf(MSG_INFO, "FILS: gAP not available"); | |
4081 | goto fail; | |
4082 | } | |
4083 | wpa_hexdump(MSG_DEBUG, "FILS: gAP", g_ap, g_ap_len); | |
4084 | } | |
4085 | #endif /* CONFIG_FILS_SK_PFS */ | |
4086 | ||
a6609937 JM |
4087 | res = fils_key_auth_sk(ick, ick_len, sm->fils_nonce, |
4088 | sm->fils_anonce, sm->own_addr, sm->bssid, | |
e6b62313 | 4089 | g_sta, g_sta_len, g_ap, g_ap_len, |
a6609937 JM |
4090 | sm->key_mgmt, sm->fils_key_auth_sta, |
4091 | sm->fils_key_auth_ap, | |
4092 | &sm->fils_key_auth_len); | |
e6b62313 | 4093 | wpabuf_free(pub); |
31bc66e4 | 4094 | forced_memzero(ick, sizeof(ick)); |
a6609937 | 4095 | return res; |
76e20f4f | 4096 | fail: |
e6b62313 | 4097 | wpabuf_free(pub); |
76e20f4f JM |
4098 | wpabuf_clear_free(dh_ss); |
4099 | return -1; | |
a6609937 JM |
4100 | } |
4101 | ||
86cd6928 | 4102 | |
7d440a3b JM |
4103 | #ifdef CONFIG_IEEE80211R |
4104 | static int fils_ft_build_assoc_req_rsne(struct wpa_sm *sm, struct wpabuf *buf) | |
4105 | { | |
4106 | struct rsn_ie_hdr *rsnie; | |
4107 | u16 capab; | |
4108 | u8 *pos; | |
994eac7e | 4109 | int use_sha384 = wpa_key_mgmt_sha384(sm->key_mgmt); |
7d440a3b JM |
4110 | |
4111 | /* RSNIE[PMKR0Name/PMKR1Name] */ | |
4112 | rsnie = wpabuf_put(buf, sizeof(*rsnie)); | |
4113 | rsnie->elem_id = WLAN_EID_RSN; | |
4114 | WPA_PUT_LE16(rsnie->version, RSN_VERSION); | |
4115 | ||
4116 | /* Group Suite Selector */ | |
4117 | if (!wpa_cipher_valid_group(sm->group_cipher)) { | |
4118 | wpa_printf(MSG_WARNING, "FT: Invalid group cipher (%d)", | |
4119 | sm->group_cipher); | |
4120 | return -1; | |
4121 | } | |
4122 | pos = wpabuf_put(buf, RSN_SELECTOR_LEN); | |
4123 | RSN_SELECTOR_PUT(pos, wpa_cipher_to_suite(WPA_PROTO_RSN, | |
4124 | sm->group_cipher)); | |
4125 | ||
4126 | /* Pairwise Suite Count */ | |
4127 | wpabuf_put_le16(buf, 1); | |
4128 | ||
4129 | /* Pairwise Suite List */ | |
4130 | if (!wpa_cipher_valid_pairwise(sm->pairwise_cipher)) { | |
4131 | wpa_printf(MSG_WARNING, "FT: Invalid pairwise cipher (%d)", | |
4132 | sm->pairwise_cipher); | |
4133 | return -1; | |
4134 | } | |
4135 | pos = wpabuf_put(buf, RSN_SELECTOR_LEN); | |
4136 | RSN_SELECTOR_PUT(pos, wpa_cipher_to_suite(WPA_PROTO_RSN, | |
4137 | sm->pairwise_cipher)); | |
4138 | ||
4139 | /* Authenticated Key Management Suite Count */ | |
4140 | wpabuf_put_le16(buf, 1); | |
4141 | ||
4142 | /* Authenticated Key Management Suite List */ | |
4143 | pos = wpabuf_put(buf, RSN_SELECTOR_LEN); | |
4144 | if (sm->key_mgmt == WPA_KEY_MGMT_FT_FILS_SHA256) | |
4145 | RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_FILS_SHA256); | |
4146 | else if (sm->key_mgmt == WPA_KEY_MGMT_FT_FILS_SHA384) | |
4147 | RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_FILS_SHA384); | |
4148 | else { | |
4149 | wpa_printf(MSG_WARNING, | |
4150 | "FILS+FT: Invalid key management type (%d)", | |
4151 | sm->key_mgmt); | |
4152 | return -1; | |
4153 | } | |
4154 | ||
4155 | /* RSN Capabilities */ | |
4156 | capab = 0; | |
e0d22c84 | 4157 | if (sm->mfp) |
7d440a3b | 4158 | capab |= WPA_CAPABILITY_MFPC; |
e0d22c84 JM |
4159 | if (sm->mfp == 2) |
4160 | capab |= WPA_CAPABILITY_MFPR; | |
55c12f5d MV |
4161 | if (sm->ocv) |
4162 | capab |= WPA_CAPABILITY_OCVC; | |
7d440a3b JM |
4163 | wpabuf_put_le16(buf, capab); |
4164 | ||
4165 | /* PMKID Count */ | |
4166 | wpabuf_put_le16(buf, 1); | |
4167 | ||
4168 | /* PMKID List [PMKR1Name] */ | |
4169 | wpa_hexdump_key(MSG_DEBUG, "FILS+FT: XXKey (FILS-FT)", | |
4170 | sm->fils_ft, sm->fils_ft_len); | |
4171 | wpa_hexdump_ascii(MSG_DEBUG, "FILS+FT: SSID", sm->ssid, sm->ssid_len); | |
4172 | wpa_hexdump(MSG_DEBUG, "FILS+FT: MDID", | |
4173 | sm->mobility_domain, MOBILITY_DOMAIN_ID_LEN); | |
4174 | wpa_hexdump_ascii(MSG_DEBUG, "FILS+FT: R0KH-ID", | |
4175 | sm->r0kh_id, sm->r0kh_id_len); | |
4176 | if (wpa_derive_pmk_r0(sm->fils_ft, sm->fils_ft_len, sm->ssid, | |
4177 | sm->ssid_len, sm->mobility_domain, | |
4178 | sm->r0kh_id, sm->r0kh_id_len, sm->own_addr, | |
994eac7e | 4179 | sm->pmk_r0, sm->pmk_r0_name, use_sha384) < 0) { |
7d440a3b JM |
4180 | wpa_printf(MSG_WARNING, "FILS+FT: Could not derive PMK-R0"); |
4181 | return -1; | |
4182 | } | |
994eac7e JM |
4183 | sm->pmk_r0_len = use_sha384 ? SHA384_MAC_LEN : PMK_LEN; |
4184 | wpa_hexdump_key(MSG_DEBUG, "FILS+FT: PMK-R0", | |
4185 | sm->pmk_r0, sm->pmk_r0_len); | |
7d440a3b JM |
4186 | wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR0Name", |
4187 | sm->pmk_r0_name, WPA_PMK_NAME_LEN); | |
4188 | wpa_printf(MSG_DEBUG, "FILS+FT: R1KH-ID: " MACSTR, | |
4189 | MAC2STR(sm->r1kh_id)); | |
4190 | pos = wpabuf_put(buf, WPA_PMK_NAME_LEN); | |
4191 | if (wpa_derive_pmk_r1_name(sm->pmk_r0_name, sm->r1kh_id, sm->own_addr, | |
b5e57699 | 4192 | sm->pmk_r1_name, use_sha384) < 0) { |
7d440a3b JM |
4193 | wpa_printf(MSG_WARNING, "FILS+FT: Could not derive PMKR1Name"); |
4194 | return -1; | |
4195 | } | |
b5e57699 JM |
4196 | wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR1Name", sm->pmk_r1_name, |
4197 | WPA_PMK_NAME_LEN); | |
4198 | os_memcpy(pos, sm->pmk_r1_name, WPA_PMK_NAME_LEN); | |
7d440a3b | 4199 | |
7d440a3b JM |
4200 | if (sm->mgmt_group_cipher == WPA_CIPHER_AES_128_CMAC) { |
4201 | /* Management Group Cipher Suite */ | |
4202 | pos = wpabuf_put(buf, RSN_SELECTOR_LEN); | |
4203 | RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_AES_128_CMAC); | |
4204 | } | |
7d440a3b JM |
4205 | |
4206 | rsnie->len = ((u8 *) wpabuf_put(buf, 0) - (u8 *) rsnie) - 2; | |
4207 | return 0; | |
4208 | } | |
4209 | #endif /* CONFIG_IEEE80211R */ | |
4210 | ||
4211 | ||
86cd6928 JM |
4212 | struct wpabuf * fils_build_assoc_req(struct wpa_sm *sm, const u8 **kek, |
4213 | size_t *kek_len, const u8 **snonce, | |
5732b770 JM |
4214 | const u8 **anonce, |
4215 | const struct wpabuf **hlp, | |
4216 | unsigned int num_hlp) | |
86cd6928 JM |
4217 | { |
4218 | struct wpabuf *buf; | |
5732b770 JM |
4219 | size_t len; |
4220 | unsigned int i; | |
86cd6928 | 4221 | |
5732b770 | 4222 | len = 1000; |
7d440a3b JM |
4223 | #ifdef CONFIG_IEEE80211R |
4224 | if (sm->fils_ft_ies) | |
4225 | len += wpabuf_len(sm->fils_ft_ies); | |
4226 | if (wpa_key_mgmt_ft(sm->key_mgmt)) | |
4227 | len += 256; | |
4228 | #endif /* CONFIG_IEEE80211R */ | |
5732b770 JM |
4229 | for (i = 0; hlp && i < num_hlp; i++) |
4230 | len += 10 + wpabuf_len(hlp[i]); | |
4231 | buf = wpabuf_alloc(len); | |
86cd6928 JM |
4232 | if (!buf) |
4233 | return NULL; | |
4234 | ||
7d440a3b JM |
4235 | #ifdef CONFIG_IEEE80211R |
4236 | if (wpa_key_mgmt_ft(sm->key_mgmt) && sm->fils_ft_ies) { | |
4237 | /* MDE and FTE when using FILS+FT */ | |
4238 | wpabuf_put_buf(buf, sm->fils_ft_ies); | |
4239 | /* RSNE with PMKR1Name in PMKID field */ | |
4240 | if (fils_ft_build_assoc_req_rsne(sm, buf) < 0) { | |
4241 | wpabuf_free(buf); | |
4242 | return NULL; | |
4243 | } | |
4244 | } | |
4245 | #endif /* CONFIG_IEEE80211R */ | |
4246 | ||
86cd6928 JM |
4247 | /* FILS Session */ |
4248 | wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */ | |
4249 | wpabuf_put_u8(buf, 1 + FILS_SESSION_LEN); /* Length */ | |
4250 | /* Element ID Extension */ | |
4251 | wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_SESSION); | |
4252 | wpabuf_put_data(buf, sm->fils_session, FILS_SESSION_LEN); | |
4253 | ||
4254 | /* Everything after FILS Session element gets encrypted in the driver | |
4255 | * with KEK. The buffer returned from here is the plaintext version. */ | |
4256 | ||
4257 | /* TODO: FILS Public Key */ | |
4258 | ||
4259 | /* FILS Key Confirm */ | |
4260 | wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */ | |
4261 | wpabuf_put_u8(buf, 1 + sm->fils_key_auth_len); /* Length */ | |
4262 | /* Element ID Extension */ | |
4263 | wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_KEY_CONFIRM); | |
4264 | wpabuf_put_data(buf, sm->fils_key_auth_sta, sm->fils_key_auth_len); | |
4265 | ||
5732b770 JM |
4266 | /* FILS HLP Container */ |
4267 | for (i = 0; hlp && i < num_hlp; i++) { | |
4268 | const u8 *pos = wpabuf_head(hlp[i]); | |
4269 | size_t left = wpabuf_len(hlp[i]); | |
4270 | ||
4271 | wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */ | |
4272 | if (left <= 254) | |
4273 | len = 1 + left; | |
4274 | else | |
4275 | len = 255; | |
4276 | wpabuf_put_u8(buf, len); /* Length */ | |
4277 | /* Element ID Extension */ | |
4278 | wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_HLP_CONTAINER); | |
4279 | /* Destination MAC Address, Source MAC Address, HLP Packet. | |
4280 | * HLP Packet is in MSDU format (i.e., included the LLC/SNAP | |
4281 | * header when LPD is used). */ | |
4282 | wpabuf_put_data(buf, pos, len - 1); | |
4283 | pos += len - 1; | |
4284 | left -= len - 1; | |
4285 | while (left) { | |
4286 | wpabuf_put_u8(buf, WLAN_EID_FRAGMENT); | |
4287 | len = left > 255 ? 255 : left; | |
4288 | wpabuf_put_u8(buf, len); | |
4289 | wpabuf_put_data(buf, pos, len); | |
4290 | pos += len; | |
4291 | left -= len; | |
4292 | } | |
4293 | } | |
86cd6928 JM |
4294 | |
4295 | /* TODO: FILS IP Address Assignment */ | |
4296 | ||
99621dc1 MV |
4297 | #ifdef CONFIG_OCV |
4298 | if (wpa_sm_ocv_enabled(sm)) { | |
4299 | struct wpa_channel_info ci; | |
4300 | u8 *pos; | |
4301 | ||
4302 | if (wpa_sm_channel_info(sm, &ci) != 0) { | |
4303 | wpa_printf(MSG_WARNING, | |
4304 | "FILS: Failed to get channel info for OCI element"); | |
4305 | wpabuf_free(buf); | |
4306 | return NULL; | |
4307 | } | |
4308 | ||
4309 | pos = wpabuf_put(buf, OCV_OCI_EXTENDED_LEN); | |
4310 | if (ocv_insert_extended_oci(&ci, pos) < 0) { | |
4311 | wpabuf_free(buf); | |
4312 | return NULL; | |
4313 | } | |
4314 | } | |
4315 | #endif /* CONFIG_OCV */ | |
4316 | ||
86cd6928 JM |
4317 | wpa_hexdump_buf(MSG_DEBUG, "FILS: Association Request plaintext", buf); |
4318 | ||
4319 | *kek = sm->ptk.kek; | |
4320 | *kek_len = sm->ptk.kek_len; | |
4321 | wpa_hexdump_key(MSG_DEBUG, "FILS: KEK for AEAD", *kek, *kek_len); | |
4322 | *snonce = sm->fils_nonce; | |
4323 | wpa_hexdump(MSG_DEBUG, "FILS: SNonce for AEAD AAD", | |
4324 | *snonce, FILS_NONCE_LEN); | |
4325 | *anonce = sm->fils_anonce; | |
4326 | wpa_hexdump(MSG_DEBUG, "FILS: ANonce for AEAD AAD", | |
4327 | *anonce, FILS_NONCE_LEN); | |
4328 | ||
4329 | return buf; | |
4330 | } | |
4331 | ||
706df429 | 4332 | |
124ddfa1 JM |
4333 | static void fils_process_hlp_resp(struct wpa_sm *sm, const u8 *resp, size_t len) |
4334 | { | |
4335 | const u8 *pos, *end; | |
4336 | ||
4337 | wpa_hexdump(MSG_MSGDUMP, "FILS: HLP response", resp, len); | |
4338 | if (len < 2 * ETH_ALEN) | |
4339 | return; | |
4340 | pos = resp + 2 * ETH_ALEN; | |
4341 | end = resp + len; | |
4342 | if (end - pos >= 6 && | |
4343 | os_memcmp(pos, "\xaa\xaa\x03\x00\x00\x00", 6) == 0) | |
4344 | pos += 6; /* Remove SNAP/LLC header */ | |
4345 | wpa_sm_fils_hlp_rx(sm, resp, resp + ETH_ALEN, pos, end - pos); | |
4346 | } | |
4347 | ||
4348 | ||
4349 | static void fils_process_hlp_container(struct wpa_sm *sm, const u8 *pos, | |
4350 | size_t len) | |
4351 | { | |
4352 | const u8 *end = pos + len; | |
4353 | u8 *tmp, *tmp_pos; | |
4354 | ||
4355 | /* Check if there are any FILS HLP Container elements */ | |
4356 | while (end - pos >= 2) { | |
4357 | if (2 + pos[1] > end - pos) | |
4358 | return; | |
4359 | if (pos[0] == WLAN_EID_EXTENSION && | |
4360 | pos[1] >= 1 + 2 * ETH_ALEN && | |
4361 | pos[2] == WLAN_EID_EXT_FILS_HLP_CONTAINER) | |
4362 | break; | |
4363 | pos += 2 + pos[1]; | |
4364 | } | |
4365 | if (end - pos < 2) | |
4366 | return; /* No FILS HLP Container elements */ | |
4367 | ||
4368 | tmp = os_malloc(end - pos); | |
4369 | if (!tmp) | |
4370 | return; | |
4371 | ||
4372 | while (end - pos >= 2) { | |
4373 | if (2 + pos[1] > end - pos || | |
4374 | pos[0] != WLAN_EID_EXTENSION || | |
4375 | pos[1] < 1 + 2 * ETH_ALEN || | |
4376 | pos[2] != WLAN_EID_EXT_FILS_HLP_CONTAINER) | |
4377 | break; | |
4378 | tmp_pos = tmp; | |
4379 | os_memcpy(tmp_pos, pos + 3, pos[1] - 1); | |
4380 | tmp_pos += pos[1] - 1; | |
4381 | pos += 2 + pos[1]; | |
4382 | ||
4383 | /* Add possible fragments */ | |
4384 | while (end - pos >= 2 && pos[0] == WLAN_EID_FRAGMENT && | |
4385 | 2 + pos[1] <= end - pos) { | |
4386 | os_memcpy(tmp_pos, pos + 2, pos[1]); | |
4387 | tmp_pos += pos[1]; | |
4388 | pos += 2 + pos[1]; | |
4389 | } | |
4390 | ||
4391 | fils_process_hlp_resp(sm, tmp, tmp_pos - tmp); | |
4392 | } | |
4393 | ||
4394 | os_free(tmp); | |
4395 | } | |
4396 | ||
4397 | ||
706df429 JM |
4398 | int fils_process_assoc_resp(struct wpa_sm *sm, const u8 *resp, size_t len) |
4399 | { | |
4400 | const struct ieee80211_mgmt *mgmt; | |
4401 | const u8 *end, *ie_start; | |
4402 | struct ieee802_11_elems elems; | |
4403 | int keylen, rsclen; | |
4404 | enum wpa_alg alg; | |
4405 | struct wpa_gtk_data gd; | |
4406 | int maxkeylen; | |
4407 | struct wpa_eapol_ie_parse kde; | |
4408 | ||
4409 | if (!sm || !sm->ptk_set) { | |
4410 | wpa_printf(MSG_DEBUG, "FILS: No KEK available"); | |
4411 | return -1; | |
4412 | } | |
4413 | ||
4414 | if (!wpa_key_mgmt_fils(sm->key_mgmt)) { | |
4415 | wpa_printf(MSG_DEBUG, "FILS: Not a FILS AKM"); | |
4416 | return -1; | |
4417 | } | |
4418 | ||
e7608511 JM |
4419 | if (sm->fils_completed) { |
4420 | wpa_printf(MSG_DEBUG, | |
4421 | "FILS: Association has already been completed for this FILS authentication - ignore unexpected retransmission"); | |
4422 | return -1; | |
4423 | } | |
4424 | ||
706df429 JM |
4425 | wpa_hexdump(MSG_DEBUG, "FILS: (Re)Association Response frame", |
4426 | resp, len); | |
4427 | ||
4428 | mgmt = (const struct ieee80211_mgmt *) resp; | |
4429 | if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_resp)) | |
4430 | return -1; | |
4431 | ||
4432 | end = resp + len; | |
4433 | /* Same offset for Association Response and Reassociation Response */ | |
4434 | ie_start = mgmt->u.assoc_resp.variable; | |
4435 | ||
4436 | if (ieee802_11_parse_elems(ie_start, end - ie_start, &elems, 1) == | |
4437 | ParseFailed) { | |
4438 | wpa_printf(MSG_DEBUG, | |
4439 | "FILS: Failed to parse decrypted elements"); | |
4440 | goto fail; | |
4441 | } | |
4442 | ||
4443 | if (!elems.fils_session) { | |
4444 | wpa_printf(MSG_DEBUG, "FILS: No FILS Session element"); | |
4445 | return -1; | |
4446 | } | |
4447 | if (os_memcmp(elems.fils_session, sm->fils_session, | |
4448 | FILS_SESSION_LEN) != 0) { | |
4449 | wpa_printf(MSG_DEBUG, "FILS: FILS Session mismatch"); | |
4450 | wpa_hexdump(MSG_DEBUG, "FILS: Received FILS Session", | |
4451 | elems.fils_session, FILS_SESSION_LEN); | |
4452 | wpa_hexdump(MSG_DEBUG, "FILS: Expected FILS Session", | |
4453 | sm->fils_session, FILS_SESSION_LEN); | |
4454 | } | |
4455 | ||
69afb6b3 JM |
4456 | if (!elems.rsn_ie) { |
4457 | wpa_printf(MSG_DEBUG, | |
4458 | "FILS: No RSNE in (Re)Association Response"); | |
4459 | /* As an interop workaround, allow this for now since IEEE Std | |
4460 | * 802.11ai-2016 did not include all the needed changes to make | |
4461 | * a FILS AP include RSNE in the frame. This workaround might | |
4462 | * eventually be removed and replaced with rejection (goto fail) | |
4463 | * to follow a strict interpretation of the standard. */ | |
4464 | } else if (wpa_compare_rsn_ie(wpa_key_mgmt_ft(sm->key_mgmt), | |
4465 | sm->ap_rsn_ie, sm->ap_rsn_ie_len, | |
4466 | elems.rsn_ie - 2, elems.rsn_ie_len + 2)) { | |
4467 | wpa_msg(sm->ctx->msg_ctx, MSG_INFO, | |
4468 | "FILS: RSNE mismatch between Beacon/Probe Response and (Re)Association Response"); | |
4469 | wpa_hexdump(MSG_DEBUG, "FILS: RSNE in Beacon/Probe Response", | |
4470 | sm->ap_rsn_ie, sm->ap_rsn_ie_len); | |
4471 | wpa_hexdump(MSG_DEBUG, "FILS: RSNE in (Re)Association Response", | |
4472 | elems.rsn_ie, elems.rsn_ie_len); | |
4473 | goto fail; | |
4474 | } | |
4475 | ||
706df429 JM |
4476 | /* TODO: FILS Public Key */ |
4477 | ||
4478 | if (!elems.fils_key_confirm) { | |
4479 | wpa_printf(MSG_DEBUG, "FILS: No FILS Key Confirm element"); | |
4480 | goto fail; | |
4481 | } | |
4482 | if (elems.fils_key_confirm_len != sm->fils_key_auth_len) { | |
4483 | wpa_printf(MSG_DEBUG, | |
4484 | "FILS: Unexpected Key-Auth length %d (expected %d)", | |
4485 | elems.fils_key_confirm_len, | |
4486 | (int) sm->fils_key_auth_len); | |
4487 | goto fail; | |
4488 | } | |
4489 | if (os_memcmp(elems.fils_key_confirm, sm->fils_key_auth_ap, | |
4490 | sm->fils_key_auth_len) != 0) { | |
4491 | wpa_printf(MSG_DEBUG, "FILS: Key-Auth mismatch"); | |
4492 | wpa_hexdump(MSG_DEBUG, "FILS: Received Key-Auth", | |
4493 | elems.fils_key_confirm, | |
4494 | elems.fils_key_confirm_len); | |
4495 | wpa_hexdump(MSG_DEBUG, "FILS: Expected Key-Auth", | |
4496 | sm->fils_key_auth_ap, sm->fils_key_auth_len); | |
4497 | goto fail; | |
4498 | } | |
4499 | ||
99621dc1 MV |
4500 | #ifdef CONFIG_OCV |
4501 | if (wpa_sm_ocv_enabled(sm)) { | |
4502 | struct wpa_channel_info ci; | |
4503 | ||
4504 | if (wpa_sm_channel_info(sm, &ci) != 0) { | |
4505 | wpa_printf(MSG_WARNING, | |
4506 | "Failed to get channel info to validate received OCI in FILS (Re)Association Response frame"); | |
4507 | goto fail; | |
4508 | } | |
4509 | ||
4510 | if (ocv_verify_tx_params(elems.oci, elems.oci_len, &ci, | |
4511 | channel_width_to_int(ci.chanwidth), | |
4512 | ci.seg1_idx) != 0) { | |
4513 | wpa_printf(MSG_WARNING, "FILS: %s", ocv_errorstr); | |
4514 | goto fail; | |
4515 | } | |
4516 | } | |
4517 | #endif /* CONFIG_OCV */ | |
4518 | ||
b5e57699 JM |
4519 | #ifdef CONFIG_IEEE80211R |
4520 | if (wpa_key_mgmt_ft(sm->key_mgmt) && sm->fils_ft_ies) { | |
4521 | struct wpa_ie_data rsn; | |
4522 | ||
4523 | /* Check that PMKR1Name derived by the AP matches */ | |
4524 | if (!elems.rsn_ie || | |
4525 | wpa_parse_wpa_ie_rsn(elems.rsn_ie - 2, elems.rsn_ie_len + 2, | |
4526 | &rsn) < 0 || | |
4527 | !rsn.pmkid || rsn.num_pmkid != 1 || | |
4528 | os_memcmp(rsn.pmkid, sm->pmk_r1_name, | |
4529 | WPA_PMK_NAME_LEN) != 0) { | |
4530 | wpa_printf(MSG_DEBUG, | |
4531 | "FILS+FT: No RSNE[PMKR1Name] match in AssocResp"); | |
4532 | goto fail; | |
4533 | } | |
4534 | } | |
4535 | #endif /* CONFIG_IEEE80211R */ | |
4536 | ||
706df429 JM |
4537 | /* Key Delivery */ |
4538 | if (!elems.key_delivery) { | |
4539 | wpa_printf(MSG_DEBUG, "FILS: No Key Delivery element"); | |
4540 | goto fail; | |
4541 | } | |
4542 | ||
4543 | /* Parse GTK and set the key to the driver */ | |
4544 | os_memset(&gd, 0, sizeof(gd)); | |
4545 | if (wpa_supplicant_parse_ies(elems.key_delivery + WPA_KEY_RSC_LEN, | |
4546 | elems.key_delivery_len - WPA_KEY_RSC_LEN, | |
4547 | &kde) < 0) { | |
4548 | wpa_printf(MSG_DEBUG, "FILS: Failed to parse KDEs"); | |
4549 | goto fail; | |
4550 | } | |
4551 | if (!kde.gtk) { | |
4552 | wpa_printf(MSG_DEBUG, "FILS: No GTK KDE"); | |
4553 | goto fail; | |
4554 | } | |
4555 | maxkeylen = gd.gtk_len = kde.gtk_len - 2; | |
4556 | if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, | |
4557 | gd.gtk_len, maxkeylen, | |
4558 | &gd.key_rsc_len, &gd.alg)) | |
4559 | goto fail; | |
4560 | ||
4561 | wpa_hexdump_key(MSG_DEBUG, "FILS: Received GTK", kde.gtk, kde.gtk_len); | |
4562 | gd.keyidx = kde.gtk[0] & 0x3; | |
4563 | gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm, | |
4564 | !!(kde.gtk[0] & BIT(2))); | |
4565 | if (kde.gtk_len - 2 > sizeof(gd.gtk)) { | |
4566 | wpa_printf(MSG_DEBUG, "FILS: Too long GTK in GTK KDE (len=%lu)", | |
4567 | (unsigned long) kde.gtk_len - 2); | |
4568 | goto fail; | |
4569 | } | |
4570 | os_memcpy(gd.gtk, kde.gtk + 2, kde.gtk_len - 2); | |
4571 | ||
4572 | wpa_printf(MSG_DEBUG, "FILS: Set GTK to driver"); | |
87e2db16 | 4573 | if (wpa_supplicant_install_gtk(sm, &gd, elems.key_delivery, 0) < 0) { |
706df429 JM |
4574 | wpa_printf(MSG_DEBUG, "FILS: Failed to set GTK"); |
4575 | goto fail; | |
4576 | } | |
4577 | ||
4578 | if (ieee80211w_set_keys(sm, &kde) < 0) { | |
4579 | wpa_printf(MSG_DEBUG, "FILS: Failed to set IGTK"); | |
4580 | goto fail; | |
4581 | } | |
4582 | ||
4583 | alg = wpa_cipher_to_alg(sm->pairwise_cipher); | |
4584 | keylen = wpa_cipher_key_len(sm->pairwise_cipher); | |
a6ea6653 JM |
4585 | if (keylen <= 0 || (unsigned int) keylen != sm->ptk.tk_len) { |
4586 | wpa_printf(MSG_DEBUG, "FILS: TK length mismatch: %u != %lu", | |
4587 | keylen, (long unsigned int) sm->ptk.tk_len); | |
4588 | goto fail; | |
4589 | } | |
706df429 JM |
4590 | rsclen = wpa_cipher_rsc_len(sm->pairwise_cipher); |
4591 | wpa_hexdump_key(MSG_DEBUG, "FILS: Set TK to driver", | |
4592 | sm->ptk.tk, keylen); | |
4593 | if (wpa_sm_set_key(sm, alg, sm->bssid, 0, 1, null_rsc, rsclen, | |
a919a260 | 4594 | sm->ptk.tk, keylen, KEY_FLAG_PAIRWISE_RX_TX) < 0) { |
706df429 JM |
4595 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
4596 | "FILS: Failed to set PTK to the driver (alg=%d keylen=%d bssid=" | |
4597 | MACSTR ")", | |
4598 | alg, keylen, MAC2STR(sm->bssid)); | |
4599 | goto fail; | |
4600 | } | |
4601 | ||
4602 | /* TODO: TK could be cleared after auth frame exchange now that driver | |
4603 | * takes care of association frame encryption/decryption. */ | |
4604 | /* TK is not needed anymore in supplicant */ | |
4605 | os_memset(sm->ptk.tk, 0, WPA_TK_MAX_LEN); | |
a6ea6653 | 4606 | sm->ptk.tk_len = 0; |
53bb18cc | 4607 | sm->ptk.installed = 1; |
706df429 | 4608 | |
124ddfa1 JM |
4609 | /* FILS HLP Container */ |
4610 | fils_process_hlp_container(sm, ie_start, end - ie_start); | |
706df429 JM |
4611 | |
4612 | /* TODO: FILS IP Address Assignment */ | |
4613 | ||
4614 | wpa_printf(MSG_DEBUG, "FILS: Auth+Assoc completed successfully"); | |
4615 | sm->fils_completed = 1; | |
31bc66e4 | 4616 | forced_memzero(&gd, sizeof(gd)); |
706df429 JM |
4617 | |
4618 | return 0; | |
4619 | fail: | |
31bc66e4 | 4620 | forced_memzero(&gd, sizeof(gd)); |
706df429 JM |
4621 | return -1; |
4622 | } | |
4623 | ||
5538fc93 VK |
4624 | |
4625 | void wpa_sm_set_reset_fils_completed(struct wpa_sm *sm, int set) | |
4626 | { | |
4627 | if (sm) | |
4628 | sm->fils_completed = !!set; | |
4629 | } | |
4630 | ||
706df429 JM |
4631 | #endif /* CONFIG_FILS */ |
4632 | ||
4633 | ||
4634 | int wpa_fils_is_completed(struct wpa_sm *sm) | |
4635 | { | |
4636 | #ifdef CONFIG_FILS | |
4637 | return sm && sm->fils_completed; | |
4638 | #else /* CONFIG_FILS */ | |
4639 | return 0; | |
f00b9b88 | 4640 | #endif /* CONFIG_FILS */ |
706df429 | 4641 | } |
0a614799 JM |
4642 | |
4643 | ||
4644 | #ifdef CONFIG_OWE | |
4645 | ||
ec9f4837 | 4646 | struct wpabuf * owe_build_assoc_req(struct wpa_sm *sm, u16 group) |
0a614799 JM |
4647 | { |
4648 | struct wpabuf *ie = NULL, *pub = NULL; | |
ec9f4837 JM |
4649 | size_t prime_len; |
4650 | ||
4651 | if (group == 19) | |
4652 | prime_len = 32; | |
4653 | else if (group == 20) | |
4654 | prime_len = 48; | |
4655 | else if (group == 21) | |
4656 | prime_len = 66; | |
4657 | else | |
4658 | return NULL; | |
0a614799 JM |
4659 | |
4660 | crypto_ecdh_deinit(sm->owe_ecdh); | |
ec9f4837 | 4661 | sm->owe_ecdh = crypto_ecdh_init(group); |
0a614799 JM |
4662 | if (!sm->owe_ecdh) |
4663 | goto fail; | |
ec9f4837 | 4664 | sm->owe_group = group; |
0a614799 | 4665 | pub = crypto_ecdh_get_pubkey(sm->owe_ecdh, 0); |
ec9f4837 | 4666 | pub = wpabuf_zeropad(pub, prime_len); |
0a614799 JM |
4667 | if (!pub) |
4668 | goto fail; | |
4669 | ||
4670 | ie = wpabuf_alloc(5 + wpabuf_len(pub)); | |
4671 | if (!ie) | |
4672 | goto fail; | |
4673 | wpabuf_put_u8(ie, WLAN_EID_EXTENSION); | |
4674 | wpabuf_put_u8(ie, 1 + 2 + wpabuf_len(pub)); | |
4675 | wpabuf_put_u8(ie, WLAN_EID_EXT_OWE_DH_PARAM); | |
ec9f4837 | 4676 | wpabuf_put_le16(ie, group); |
0a614799 JM |
4677 | wpabuf_put_buf(ie, pub); |
4678 | wpabuf_free(pub); | |
4679 | wpa_hexdump_buf(MSG_DEBUG, "OWE: Diffie-Hellman Parameter element", | |
4680 | ie); | |
4681 | ||
4682 | return ie; | |
4683 | fail: | |
4684 | wpabuf_free(pub); | |
4685 | crypto_ecdh_deinit(sm->owe_ecdh); | |
4686 | sm->owe_ecdh = NULL; | |
4687 | return NULL; | |
4688 | } | |
4689 | ||
4690 | ||
5a78c361 JM |
4691 | int owe_process_assoc_resp(struct wpa_sm *sm, const u8 *bssid, |
4692 | const u8 *resp_ies, size_t resp_ies_len) | |
0a614799 JM |
4693 | { |
4694 | struct ieee802_11_elems elems; | |
4695 | u16 group; | |
4696 | struct wpabuf *secret, *pub, *hkey; | |
4697 | int res; | |
ec9f4837 | 4698 | u8 prk[SHA512_MAC_LEN], pmkid[SHA512_MAC_LEN]; |
0a614799 JM |
4699 | const char *info = "OWE Key Generation"; |
4700 | const u8 *addr[2]; | |
4701 | size_t len[2]; | |
ec9f4837 | 4702 | size_t hash_len, prime_len; |
5a78c361 | 4703 | struct wpa_ie_data data; |
0a614799 JM |
4704 | |
4705 | if (!resp_ies || | |
4706 | ieee802_11_parse_elems(resp_ies, resp_ies_len, &elems, 1) == | |
5a78c361 JM |
4707 | ParseFailed) { |
4708 | wpa_printf(MSG_INFO, | |
4709 | "OWE: Could not parse Association Response frame elements"); | |
4710 | return -1; | |
4711 | } | |
4712 | ||
4713 | if (sm->cur_pmksa && elems.rsn_ie && | |
4714 | wpa_parse_wpa_ie_rsn(elems.rsn_ie - 2, 2 + elems.rsn_ie_len, | |
4715 | &data) == 0 && | |
4716 | data.num_pmkid == 1 && data.pmkid && | |
4717 | os_memcmp(sm->cur_pmksa->pmkid, data.pmkid, PMKID_LEN) == 0) { | |
4718 | wpa_printf(MSG_DEBUG, "OWE: Use PMKSA caching"); | |
4719 | wpa_sm_set_pmk_from_pmksa(sm); | |
4720 | return 0; | |
4721 | } | |
4722 | ||
4723 | if (!elems.owe_dh) { | |
0a614799 JM |
4724 | wpa_printf(MSG_INFO, |
4725 | "OWE: No Diffie-Hellman Parameter element found in Association Response frame"); | |
4726 | return -1; | |
4727 | } | |
4728 | ||
4729 | group = WPA_GET_LE16(elems.owe_dh); | |
ec9f4837 | 4730 | if (group != sm->owe_group) { |
0a614799 JM |
4731 | wpa_printf(MSG_INFO, |
4732 | "OWE: Unexpected Diffie-Hellman group in response: %u", | |
4733 | group); | |
4734 | return -1; | |
4735 | } | |
4736 | ||
4737 | if (!sm->owe_ecdh) { | |
4738 | wpa_printf(MSG_INFO, "OWE: No ECDH state available"); | |
4739 | return -1; | |
4740 | } | |
4741 | ||
ec9f4837 JM |
4742 | if (group == 19) |
4743 | prime_len = 32; | |
4744 | else if (group == 20) | |
4745 | prime_len = 48; | |
4746 | else if (group == 21) | |
4747 | prime_len = 66; | |
4748 | else | |
4749 | return -1; | |
4750 | ||
0a614799 JM |
4751 | secret = crypto_ecdh_set_peerkey(sm->owe_ecdh, 0, |
4752 | elems.owe_dh + 2, | |
4753 | elems.owe_dh_len - 2); | |
ec9f4837 | 4754 | secret = wpabuf_zeropad(secret, prime_len); |
0a614799 JM |
4755 | if (!secret) { |
4756 | wpa_printf(MSG_DEBUG, "OWE: Invalid peer DH public key"); | |
4757 | return -1; | |
4758 | } | |
4759 | wpa_hexdump_buf_key(MSG_DEBUG, "OWE: DH shared secret", secret); | |
4760 | ||
4761 | /* prk = HKDF-extract(C | A | group, z) */ | |
4762 | ||
4763 | pub = crypto_ecdh_get_pubkey(sm->owe_ecdh, 0); | |
4764 | if (!pub) { | |
4765 | wpabuf_clear_free(secret); | |
4766 | return -1; | |
4767 | } | |
4768 | ||
4769 | /* PMKID = Truncate-128(Hash(C | A)) */ | |
4770 | addr[0] = wpabuf_head(pub); | |
4771 | len[0] = wpabuf_len(pub); | |
4772 | addr[1] = elems.owe_dh + 2; | |
4773 | len[1] = elems.owe_dh_len - 2; | |
ec9f4837 JM |
4774 | if (group == 19) { |
4775 | res = sha256_vector(2, addr, len, pmkid); | |
4776 | hash_len = SHA256_MAC_LEN; | |
4777 | } else if (group == 20) { | |
4778 | res = sha384_vector(2, addr, len, pmkid); | |
4779 | hash_len = SHA384_MAC_LEN; | |
4780 | } else if (group == 21) { | |
4781 | res = sha512_vector(2, addr, len, pmkid); | |
4782 | hash_len = SHA512_MAC_LEN; | |
4783 | } else { | |
4784 | res = -1; | |
4785 | hash_len = 0; | |
4786 | } | |
4787 | pub = wpabuf_zeropad(pub, prime_len); | |
4788 | if (res < 0 || !pub) { | |
0a614799 JM |
4789 | wpabuf_free(pub); |
4790 | wpabuf_clear_free(secret); | |
4791 | return -1; | |
4792 | } | |
4793 | ||
4794 | hkey = wpabuf_alloc(wpabuf_len(pub) + elems.owe_dh_len - 2 + 2); | |
4795 | if (!hkey) { | |
4796 | wpabuf_free(pub); | |
4797 | wpabuf_clear_free(secret); | |
4798 | return -1; | |
4799 | } | |
4800 | ||
4801 | wpabuf_put_buf(hkey, pub); /* C */ | |
4802 | wpabuf_free(pub); | |
4803 | wpabuf_put_data(hkey, elems.owe_dh + 2, elems.owe_dh_len - 2); /* A */ | |
ec9f4837 JM |
4804 | wpabuf_put_le16(hkey, sm->owe_group); /* group */ |
4805 | if (group == 19) | |
4806 | res = hmac_sha256(wpabuf_head(hkey), wpabuf_len(hkey), | |
4807 | wpabuf_head(secret), wpabuf_len(secret), prk); | |
4808 | else if (group == 20) | |
4809 | res = hmac_sha384(wpabuf_head(hkey), wpabuf_len(hkey), | |
4810 | wpabuf_head(secret), wpabuf_len(secret), prk); | |
4811 | else if (group == 21) | |
4812 | res = hmac_sha512(wpabuf_head(hkey), wpabuf_len(hkey), | |
4813 | wpabuf_head(secret), wpabuf_len(secret), prk); | |
0a614799 JM |
4814 | wpabuf_clear_free(hkey); |
4815 | wpabuf_clear_free(secret); | |
4816 | if (res < 0) | |
4817 | return -1; | |
4818 | ||
ec9f4837 | 4819 | wpa_hexdump_key(MSG_DEBUG, "OWE: prk", prk, hash_len); |
0a614799 JM |
4820 | |
4821 | /* PMK = HKDF-expand(prk, "OWE Key Generation", n) */ | |
4822 | ||
ec9f4837 JM |
4823 | if (group == 19) |
4824 | res = hmac_sha256_kdf(prk, hash_len, NULL, (const u8 *) info, | |
4825 | os_strlen(info), sm->pmk, hash_len); | |
4826 | else if (group == 20) | |
4827 | res = hmac_sha384_kdf(prk, hash_len, NULL, (const u8 *) info, | |
4828 | os_strlen(info), sm->pmk, hash_len); | |
4829 | else if (group == 21) | |
4830 | res = hmac_sha512_kdf(prk, hash_len, NULL, (const u8 *) info, | |
4831 | os_strlen(info), sm->pmk, hash_len); | |
31bc66e4 | 4832 | forced_memzero(prk, SHA512_MAC_LEN); |
1bd13110 JM |
4833 | if (res < 0) { |
4834 | sm->pmk_len = 0; | |
0a614799 | 4835 | return -1; |
1bd13110 | 4836 | } |
ec9f4837 | 4837 | sm->pmk_len = hash_len; |
0a614799 | 4838 | |
ec9f4837 | 4839 | wpa_hexdump_key(MSG_DEBUG, "OWE: PMK", sm->pmk, sm->pmk_len); |
0a614799 | 4840 | wpa_hexdump(MSG_DEBUG, "OWE: PMKID", pmkid, PMKID_LEN); |
5a78c361 JM |
4841 | pmksa_cache_add(sm->pmksa, sm->pmk, sm->pmk_len, pmkid, NULL, 0, |
4842 | bssid, sm->own_addr, sm->network_ctx, sm->key_mgmt, | |
4843 | NULL); | |
0a614799 JM |
4844 | |
4845 | return 0; | |
4846 | } | |
4847 | ||
4848 | #endif /* CONFIG_OWE */ | |
bbe7969d VK |
4849 | |
4850 | ||
4851 | void wpa_sm_set_fils_cache_id(struct wpa_sm *sm, const u8 *fils_cache_id) | |
4852 | { | |
4853 | #ifdef CONFIG_FILS | |
4854 | if (sm && fils_cache_id) { | |
4855 | sm->fils_cache_id_set = 1; | |
4856 | os_memcpy(sm->fils_cache_id, fils_cache_id, FILS_CACHE_ID_LEN); | |
4857 | } | |
4858 | #endif /* CONFIG_FILS */ | |
4859 | } | |
10ec6a5f JM |
4860 | |
4861 | ||
4862 | #ifdef CONFIG_DPP2 | |
4863 | void wpa_sm_set_dpp_z(struct wpa_sm *sm, const struct wpabuf *z) | |
4864 | { | |
4865 | if (sm) { | |
4866 | wpabuf_clear_free(sm->dpp_z); | |
4867 | sm->dpp_z = z ? wpabuf_dup(z) : NULL; | |
4868 | } | |
4869 | } | |
4870 | #endif /* CONFIG_DPP2 */ |