1 /*
2 * EAP peer method: EAP-FAST (RFC 4851)
3 * Copyright (c) 2004-2015, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "includes.h"
10
11 #include "common.h"
12 #include "crypto/tls.h"
13 #include "crypto/sha1.h"
14 #include "eap_common/eap_tlv_common.h"
15 #include "eap_i.h"
16 #include "eap_tls_common.h"
17 #include "eap_config.h"
18 #include "eap_fast_pac.h"
19
20 #ifdef EAP_FAST_DYNAMIC
21 #include "eap_fast_pac.c"
22 #endif /* EAP_FAST_DYNAMIC */
23
24 /* TODO:
25 * - test session resumption and enable it if it interoperates
26 * - password change (pending mschapv2 packet; replay decrypted packet)
27 */
28
29
30 static void eap_fast_deinit(struct eap_sm *sm, void *priv);
31
32
33 struct eap_fast_data {
34 struct eap_ssl_data ssl;
35
36 int fast_version;
37
38 const struct eap_method *phase2_method;
39 void *phase2_priv;
40 int phase2_success;
41
42 struct eap_method_type phase2_type;
43 struct eap_method_type *phase2_types;
44 size_t num_phase2_types;
45 int resuming; /* starting a resumed session */
46 struct eap_fast_key_block_provisioning *key_block_p;
47 #define EAP_FAST_PROV_UNAUTH 1
48 #define EAP_FAST_PROV_AUTH 2
49 int provisioning_allowed; /* Allowed PAC provisioning modes */
50 int provisioning; /* doing PAC provisioning (not the normal auth) */
51 int anon_provisioning; /* doing anonymous (unauthenticated)
52 * provisioning */
53 int session_ticket_used;
54
55 u8 key_data[EAP_FAST_KEY_LEN];
56 u8 *session_id;
57 size_t id_len;
58 u8 emsk[EAP_EMSK_LEN];
59 int success;
60
61 struct eap_fast_pac *pac;
62 struct eap_fast_pac *current_pac;
63 size_t max_pac_list_len;
64 int use_pac_binary_format;
65
66 u8 simck[EAP_FAST_SIMCK_LEN];
67 int simck_idx;
68
69 struct wpabuf *pending_phase2_req;
70 struct wpabuf *pending_resp;
71 };
72
73
eap_fast_session_ticket_cb(void * ctx,const u8 * ticket,size_t len,const u8 * client_random,const u8 * server_random,u8 * master_secret)74 static int eap_fast_session_ticket_cb(void *ctx, const u8 *ticket, size_t len,
75 const u8 *client_random,
76 const u8 *server_random,
77 u8 *master_secret)
78 {
79 struct eap_fast_data *data = ctx;
80
81 wpa_printf(MSG_DEBUG, "EAP-FAST: SessionTicket callback");
82
83 if (client_random == NULL || server_random == NULL ||
84 master_secret == NULL) {
85 wpa_printf(MSG_DEBUG, "EAP-FAST: SessionTicket failed - fall "
86 "back to full TLS handshake");
87 data->session_ticket_used = 0;
88 if (data->provisioning_allowed) {
89 wpa_printf(MSG_DEBUG, "EAP-FAST: Try to provision a "
90 "new PAC-Key");
91 data->provisioning = 1;
92 data->current_pac = NULL;
93 }
94 return 0;
95 }
96
97 wpa_hexdump(MSG_DEBUG, "EAP-FAST: SessionTicket", ticket, len);
98
99 if (data->current_pac == NULL) {
100 wpa_printf(MSG_DEBUG, "EAP-FAST: No PAC-Key available for "
101 "using SessionTicket");
102 data->session_ticket_used = 0;
103 return 0;
104 }
105
106 eap_fast_derive_master_secret(data->current_pac->pac_key,
107 server_random, client_random,
108 master_secret);
109
110 data->session_ticket_used = 1;
111
112 return 1;
113 }
114
115
eap_fast_parse_phase1(struct eap_fast_data * data,const char * phase1)116 static void eap_fast_parse_phase1(struct eap_fast_data *data,
117 const char *phase1)
118 {
119 const char *pos;
120
121 pos = os_strstr(phase1, "fast_provisioning=");
122 if (pos) {
123 data->provisioning_allowed = atoi(pos + 18);
124 wpa_printf(MSG_DEBUG, "EAP-FAST: Automatic PAC provisioning "
125 "mode: %d", data->provisioning_allowed);
126 }
127
128 pos = os_strstr(phase1, "fast_max_pac_list_len=");
129 if (pos) {
130 data->max_pac_list_len = atoi(pos + 22);
131 if (data->max_pac_list_len == 0)
132 data->max_pac_list_len = 1;
133 wpa_printf(MSG_DEBUG, "EAP-FAST: Maximum PAC list length: %lu",
134 (unsigned long) data->max_pac_list_len);
135 }
136
137 pos = os_strstr(phase1, "fast_pac_format=binary");
138 if (pos) {
139 data->use_pac_binary_format = 1;
140 wpa_printf(MSG_DEBUG, "EAP-FAST: Using binary format for PAC "
141 "list");
142 }
143 }
144
145
eap_fast_init(struct eap_sm * sm)146 static void * eap_fast_init(struct eap_sm *sm)
147 {
148 struct eap_fast_data *data;
149 struct eap_peer_config *config = eap_get_config(sm);
150
151 if (config == NULL)
152 return NULL;
153
154 data = os_zalloc(sizeof(*data));
155 if (data == NULL)
156 return NULL;
157 data->fast_version = EAP_FAST_VERSION;
158 data->max_pac_list_len = 10;
159
160 if (config->phase1)
161 eap_fast_parse_phase1(data, config->phase1);
162
163 if (eap_peer_select_phase2_methods(config, "auth=",
164 &data->phase2_types,
165 &data->num_phase2_types) < 0) {
166 eap_fast_deinit(sm, data);
167 return NULL;
168 }
169
170 data->phase2_type.vendor = EAP_VENDOR_IETF;
171 data->phase2_type.method = EAP_TYPE_NONE;
172
173 if (eap_peer_tls_ssl_init(sm, &data->ssl, config, EAP_TYPE_FAST)) {
174 wpa_printf(MSG_INFO, "EAP-FAST: Failed to initialize SSL.");
175 eap_fast_deinit(sm, data);
176 return NULL;
177 }
178
179 if (tls_connection_set_session_ticket_cb(sm->ssl_ctx, data->ssl.conn,
180 eap_fast_session_ticket_cb,
181 data) < 0) {
182 wpa_printf(MSG_INFO, "EAP-FAST: Failed to set SessionTicket "
183 "callback");
184 eap_fast_deinit(sm, data);
185 return NULL;
186 }
187
188 /*
189 * The local RADIUS server in a Cisco AP does not seem to like empty
190 * fragments before data, so disable that workaround for CBC.
191 * TODO: consider making this configurable
192 */
193 if (tls_connection_enable_workaround(sm->ssl_ctx, data->ssl.conn)) {
194 wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to enable TLS "
195 "workarounds");
196 }
197
198 if (!config->pac_file) {
199 wpa_printf(MSG_INFO, "EAP-FAST: No PAC file configured");
200 eap_fast_deinit(sm, data);
201 return NULL;
202 }
203
204 if (data->use_pac_binary_format &&
205 eap_fast_load_pac_bin(sm, &data->pac, config->pac_file) < 0) {
206 wpa_printf(MSG_INFO, "EAP-FAST: Failed to load PAC file");
207 eap_fast_deinit(sm, data);
208 return NULL;
209 }
210
211 if (!data->use_pac_binary_format &&
212 eap_fast_load_pac(sm, &data->pac, config->pac_file) < 0) {
213 wpa_printf(MSG_INFO, "EAP-FAST: Failed to load PAC file");
214 eap_fast_deinit(sm, data);
215 return NULL;
216 }
217 eap_fast_pac_list_truncate(data->pac, data->max_pac_list_len);
218
219 if (data->pac == NULL && !data->provisioning_allowed) {
220 wpa_printf(MSG_INFO, "EAP-FAST: No PAC configured and "
221 "provisioning disabled");
222 eap_fast_deinit(sm, data);
223 return NULL;
224 }
225
226 return data;
227 }
228
229
eap_fast_deinit(struct eap_sm * sm,void * priv)230 static void eap_fast_deinit(struct eap_sm *sm, void *priv)
231 {
232 struct eap_fast_data *data = priv;
233 struct eap_fast_pac *pac, *prev;
234
235 if (data == NULL)
236 return;
237 if (data->phase2_priv && data->phase2_method)
238 data->phase2_method->deinit(sm, data->phase2_priv);
239 os_free(data->phase2_types);
240 os_free(data->key_block_p);
241 eap_peer_tls_ssl_deinit(sm, &data->ssl);
242
243 pac = data->pac;
244 prev = NULL;
245 while (pac) {
246 prev = pac;
247 pac = pac->next;
248 eap_fast_free_pac(prev);
249 }
250 os_memset(data->key_data, 0, EAP_FAST_KEY_LEN);
251 os_memset(data->emsk, 0, EAP_EMSK_LEN);
252 os_free(data->session_id);
253 wpabuf_free(data->pending_phase2_req);
254 wpabuf_free(data->pending_resp);
255 os_free(data);
256 }
257
258
eap_fast_derive_msk(struct eap_fast_data * data)259 static int eap_fast_derive_msk(struct eap_fast_data *data)
260 {
261 if (eap_fast_derive_eap_msk(data->simck, data->key_data) < 0 ||
262 eap_fast_derive_eap_emsk(data->simck, data->emsk) < 0)
263 return -1;
264 data->success = 1;
265 return 0;
266 }
267
268
eap_fast_derive_key_auth(struct eap_sm * sm,struct eap_fast_data * data)269 static int eap_fast_derive_key_auth(struct eap_sm *sm,
270 struct eap_fast_data *data)
271 {
272 u8 *sks;
273
274 /* RFC 4851, Section 5.1:
275 * Extra key material after TLS key_block: session_key_seed[40]
276 */
277
278 sks = eap_fast_derive_key(sm->ssl_ctx, data->ssl.conn, "key expansion",
279 EAP_FAST_SKS_LEN);
280 if (sks == NULL) {
281 wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to derive "
282 "session_key_seed");
283 return -1;
284 }
285
286 /*
287 * RFC 4851, Section 5.2:
288 * S-IMCK[0] = session_key_seed
289 */
290 wpa_hexdump_key(MSG_DEBUG,
291 "EAP-FAST: session_key_seed (SKS = S-IMCK[0])",
292 sks, EAP_FAST_SKS_LEN);
293 data->simck_idx = 0;
294 os_memcpy(data->simck, sks, EAP_FAST_SIMCK_LEN);
295 os_free(sks);
296 return 0;
297 }
298
299
eap_fast_derive_key_provisioning(struct eap_sm * sm,struct eap_fast_data * data)300 static int eap_fast_derive_key_provisioning(struct eap_sm *sm,
301 struct eap_fast_data *data)
302 {
303 os_free(data->key_block_p);
304 data->key_block_p = (struct eap_fast_key_block_provisioning *)
305 eap_fast_derive_key(sm->ssl_ctx, data->ssl.conn,
306 "key expansion",
307 sizeof(*data->key_block_p));
308 if (data->key_block_p == NULL) {
309 wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to derive key block");
310 return -1;
311 }
312 /*
313 * RFC 4851, Section 5.2:
314 * S-IMCK[0] = session_key_seed
315 */
316 wpa_hexdump_key(MSG_DEBUG,
317 "EAP-FAST: session_key_seed (SKS = S-IMCK[0])",
318 data->key_block_p->session_key_seed,
319 sizeof(data->key_block_p->session_key_seed));
320 data->simck_idx = 0;
321 os_memcpy(data->simck, data->key_block_p->session_key_seed,
322 EAP_FAST_SIMCK_LEN);
323 wpa_hexdump_key(MSG_DEBUG, "EAP-FAST: server_challenge",
324 data->key_block_p->server_challenge,
325 sizeof(data->key_block_p->server_challenge));
326 wpa_hexdump_key(MSG_DEBUG, "EAP-FAST: client_challenge",
327 data->key_block_p->client_challenge,
328 sizeof(data->key_block_p->client_challenge));
329 return 0;
330 }
331
332
eap_fast_derive_keys(struct eap_sm * sm,struct eap_fast_data * data)333 static int eap_fast_derive_keys(struct eap_sm *sm, struct eap_fast_data *data)
334 {
335 int res;
336
337 if (data->anon_provisioning)
338 res = eap_fast_derive_key_provisioning(sm, data);
339 else
340 res = eap_fast_derive_key_auth(sm, data);
341 return res;
342 }
343
344
eap_fast_init_phase2_method(struct eap_sm * sm,struct eap_fast_data * data)345 static int eap_fast_init_phase2_method(struct eap_sm *sm,
346 struct eap_fast_data *data)
347 {
348 data->phase2_method =
349 eap_peer_get_eap_method(data->phase2_type.vendor,
350 data->phase2_type.method);
351 if (data->phase2_method == NULL)
352 return -1;
353
354 if (data->key_block_p) {
355 sm->auth_challenge = data->key_block_p->server_challenge;
356 sm->peer_challenge = data->key_block_p->client_challenge;
357 }
358 sm->init_phase2 = 1;
359 data->phase2_priv = data->phase2_method->init(sm);
360 sm->init_phase2 = 0;
361 sm->auth_challenge = NULL;
362 sm->peer_challenge = NULL;
363
364 return data->phase2_priv == NULL ? -1 : 0;
365 }
366
367
eap_fast_select_phase2_method(struct eap_fast_data * data,u8 type)368 static int eap_fast_select_phase2_method(struct eap_fast_data *data, u8 type)
369 {
370 size_t i;
371
372 /* TODO: TNC with anonymous provisioning; need to require both
373 * completed MSCHAPv2 and TNC */
374
375 if (data->anon_provisioning && type != EAP_TYPE_MSCHAPV2) {
376 wpa_printf(MSG_INFO, "EAP-FAST: Only EAP-MSCHAPv2 is allowed "
377 "during unauthenticated provisioning; reject phase2"
378 " type %d", type);
379 return -1;
380 }
381
382 #ifdef EAP_TNC
383 if (type == EAP_TYPE_TNC) {
384 data->phase2_type.vendor = EAP_VENDOR_IETF;
385 data->phase2_type.method = EAP_TYPE_TNC;
386 wpa_printf(MSG_DEBUG, "EAP-FAST: Selected Phase 2 EAP "
387 "vendor %d method %d for TNC",
388 data->phase2_type.vendor,
389 data->phase2_type.method);
390 return 0;
391 }
392 #endif /* EAP_TNC */
393
394 for (i = 0; i < data->num_phase2_types; i++) {
395 if (data->phase2_types[i].vendor != EAP_VENDOR_IETF ||
396 data->phase2_types[i].method != type)
397 continue;
398
399 data->phase2_type.vendor = data->phase2_types[i].vendor;
400 data->phase2_type.method = data->phase2_types[i].method;
401 wpa_printf(MSG_DEBUG, "EAP-FAST: Selected Phase 2 EAP "
402 "vendor %d method %d",
403 data->phase2_type.vendor,
404 data->phase2_type.method);
405 break;
406 }
407
408 if (type != data->phase2_type.method || type == EAP_TYPE_NONE)
409 return -1;
410
411 return 0;
412 }
413
414
eap_fast_phase2_request(struct eap_sm * sm,struct eap_fast_data * data,struct eap_method_ret * ret,struct eap_hdr * hdr,struct wpabuf ** resp)415 static int eap_fast_phase2_request(struct eap_sm *sm,
416 struct eap_fast_data *data,
417 struct eap_method_ret *ret,
418 struct eap_hdr *hdr,
419 struct wpabuf **resp)
420 {
421 size_t len = be_to_host16(hdr->length);
422 u8 *pos;
423 struct eap_method_ret iret;
424 struct eap_peer_config *config = eap_get_config(sm);
425 struct wpabuf msg;
426
427 if (len <= sizeof(struct eap_hdr)) {
428 wpa_printf(MSG_INFO, "EAP-FAST: too short "
429 "Phase 2 request (len=%lu)", (unsigned long) len);
430 return -1;
431 }
432 pos = (u8 *) (hdr + 1);
433 wpa_printf(MSG_DEBUG, "EAP-FAST: Phase 2 Request: type=%d", *pos);
434 if (*pos == EAP_TYPE_IDENTITY) {
435 *resp = eap_sm_buildIdentity(sm, hdr->identifier, 1);
436 return 0;
437 }
438
439 if (data->phase2_priv && data->phase2_method &&
440 *pos != data->phase2_type.method) {
441 wpa_printf(MSG_DEBUG, "EAP-FAST: Phase 2 EAP sequence - "
442 "deinitialize previous method");
443 data->phase2_method->deinit(sm, data->phase2_priv);
444 data->phase2_method = NULL;
445 data->phase2_priv = NULL;
446 data->phase2_type.vendor = EAP_VENDOR_IETF;
447 data->phase2_type.method = EAP_TYPE_NONE;
448 }
449
450 if (data->phase2_type.vendor == EAP_VENDOR_IETF &&
451 data->phase2_type.method == EAP_TYPE_NONE &&
452 eap_fast_select_phase2_method(data, *pos) < 0) {
453 if (eap_peer_tls_phase2_nak(data->phase2_types,
454 data->num_phase2_types,
455 hdr, resp))
456 return -1;
457 return 0;
458 }
459
460 if ((data->phase2_priv == NULL &&
461 eap_fast_init_phase2_method(sm, data) < 0) ||
462 data->phase2_method == NULL) {
463 wpa_printf(MSG_INFO, "EAP-FAST: Failed to initialize "
464 "Phase 2 EAP method %d", *pos);
465 ret->methodState = METHOD_DONE;
466 ret->decision = DECISION_FAIL;
467 return -1;
468 }
469
470 os_memset(&iret, 0, sizeof(iret));
471 wpabuf_set(&msg, hdr, len);
472 *resp = data->phase2_method->process(sm, data->phase2_priv, &iret,
473 &msg);
474 if (*resp == NULL ||
475 (iret.methodState == METHOD_DONE &&
476 iret.decision == DECISION_FAIL)) {
477 ret->methodState = METHOD_DONE;
478 ret->decision = DECISION_FAIL;
479 } else if ((iret.methodState == METHOD_DONE ||
480 iret.methodState == METHOD_MAY_CONT) &&
481 (iret.decision == DECISION_UNCOND_SUCC ||
482 iret.decision == DECISION_COND_SUCC)) {
483 data->phase2_success = 1;
484 }
485
486 if (*resp == NULL && config &&
487 (config->pending_req_identity || config->pending_req_password ||
488 config->pending_req_otp || config->pending_req_new_password)) {
489 wpabuf_free(data->pending_phase2_req);
490 data->pending_phase2_req = wpabuf_alloc_copy(hdr, len);
491 } else if (*resp == NULL)
492 return -1;
493
494 return 0;
495 }
496
497
eap_fast_tlv_nak(int vendor_id,int tlv_type)498 static struct wpabuf * eap_fast_tlv_nak(int vendor_id, int tlv_type)
499 {
500 struct wpabuf *buf;
501 struct eap_tlv_nak_tlv *nak;
502 buf = wpabuf_alloc(sizeof(*nak));
503 if (buf == NULL)
504 return NULL;
505 nak = wpabuf_put(buf, sizeof(*nak));
506 nak->tlv_type = host_to_be16(EAP_TLV_TYPE_MANDATORY | EAP_TLV_NAK_TLV);
507 nak->length = host_to_be16(6);
508 nak->vendor_id = host_to_be32(vendor_id);
509 nak->nak_type = host_to_be16(tlv_type);
510 return buf;
511 }
512
513
eap_fast_tlv_result(int status,int intermediate)514 static struct wpabuf * eap_fast_tlv_result(int status, int intermediate)
515 {
516 struct wpabuf *buf;
517 struct eap_tlv_intermediate_result_tlv *result;
518 buf = wpabuf_alloc(sizeof(*result));
519 if (buf == NULL)
520 return NULL;
521 wpa_printf(MSG_DEBUG, "EAP-FAST: Add %sResult TLV(status=%d)",
522 intermediate ? "Intermediate " : "", status);
523 result = wpabuf_put(buf, sizeof(*result));
524 result->tlv_type = host_to_be16(EAP_TLV_TYPE_MANDATORY |
525 (intermediate ?
526 EAP_TLV_INTERMEDIATE_RESULT_TLV :
527 EAP_TLV_RESULT_TLV));
528 result->length = host_to_be16(2);
529 result->status = host_to_be16(status);
530 return buf;
531 }
532
533
eap_fast_tlv_pac_ack(void)534 static struct wpabuf * eap_fast_tlv_pac_ack(void)
535 {
536 struct wpabuf *buf;
537 struct eap_tlv_result_tlv *res;
538 struct eap_tlv_pac_ack_tlv *ack;
539
540 buf = wpabuf_alloc(sizeof(*res) + sizeof(*ack));
541 if (buf == NULL)
542 return NULL;
543
544 wpa_printf(MSG_DEBUG, "EAP-FAST: Add PAC TLV (ack)");
545 ack = wpabuf_put(buf, sizeof(*ack));
546 ack->tlv_type = host_to_be16(EAP_TLV_PAC_TLV |
547 EAP_TLV_TYPE_MANDATORY);
548 ack->length = host_to_be16(sizeof(*ack) - sizeof(struct eap_tlv_hdr));
549 ack->pac_type = host_to_be16(PAC_TYPE_PAC_ACKNOWLEDGEMENT);
550 ack->pac_len = host_to_be16(2);
551 ack->result = host_to_be16(EAP_TLV_RESULT_SUCCESS);
552
553 return buf;
554 }
555
556
eap_fast_process_eap_payload_tlv(struct eap_sm * sm,struct eap_fast_data * data,struct eap_method_ret * ret,u8 * eap_payload_tlv,size_t eap_payload_tlv_len)557 static struct wpabuf * eap_fast_process_eap_payload_tlv(
558 struct eap_sm *sm, struct eap_fast_data *data,
559 struct eap_method_ret *ret,
560 u8 *eap_payload_tlv, size_t eap_payload_tlv_len)
561 {
562 struct eap_hdr *hdr;
563 struct wpabuf *resp = NULL;
564
565 if (eap_payload_tlv_len < sizeof(*hdr)) {
566 wpa_printf(MSG_DEBUG, "EAP-FAST: too short EAP "
567 "Payload TLV (len=%lu)",
568 (unsigned long) eap_payload_tlv_len);
569 return NULL;
570 }
571
572 hdr = (struct eap_hdr *) eap_payload_tlv;
573 if (be_to_host16(hdr->length) > eap_payload_tlv_len) {
574 wpa_printf(MSG_DEBUG, "EAP-FAST: EAP packet overflow in "
575 "EAP Payload TLV");
576 return NULL;
577 }
578
579 if (hdr->code != EAP_CODE_REQUEST) {
580 wpa_printf(MSG_INFO, "EAP-FAST: Unexpected code=%d in "
581 "Phase 2 EAP header", hdr->code);
582 return NULL;
583 }
584
585 if (eap_fast_phase2_request(sm, data, ret, hdr, &resp)) {
586 wpa_printf(MSG_INFO, "EAP-FAST: Phase2 Request processing "
587 "failed");
588 return NULL;
589 }
590
591 return eap_fast_tlv_eap_payload(resp);
592 }
593
594
eap_fast_validate_crypto_binding(struct eap_tlv_crypto_binding_tlv * _bind)595 static int eap_fast_validate_crypto_binding(
596 struct eap_tlv_crypto_binding_tlv *_bind)
597 {
598 wpa_printf(MSG_DEBUG, "EAP-FAST: Crypto-Binding TLV: Version %d "
599 "Received Version %d SubType %d",
600 _bind->version, _bind->received_version, _bind->subtype);
601 wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: NONCE",
602 _bind->nonce, sizeof(_bind->nonce));
603 wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Compound MAC",
604 _bind->compound_mac, sizeof(_bind->compound_mac));
605
606 if (_bind->version != EAP_FAST_VERSION ||
607 _bind->received_version != EAP_FAST_VERSION ||
608 _bind->subtype != EAP_TLV_CRYPTO_BINDING_SUBTYPE_REQUEST) {
609 wpa_printf(MSG_INFO, "EAP-FAST: Invalid version/subtype in "
610 "Crypto-Binding TLV: Version %d "
611 "Received Version %d SubType %d",
612 _bind->version, _bind->received_version,
613 _bind->subtype);
614 return -1;
615 }
616
617 return 0;
618 }
619
620
eap_fast_write_crypto_binding(struct eap_tlv_crypto_binding_tlv * rbind,struct eap_tlv_crypto_binding_tlv * _bind,const u8 * cmk)621 static void eap_fast_write_crypto_binding(
622 struct eap_tlv_crypto_binding_tlv *rbind,
623 struct eap_tlv_crypto_binding_tlv *_bind, const u8 *cmk)
624 {
625 rbind->tlv_type = host_to_be16(EAP_TLV_TYPE_MANDATORY |
626 EAP_TLV_CRYPTO_BINDING_TLV);
627 rbind->length = host_to_be16(sizeof(*rbind) -
628 sizeof(struct eap_tlv_hdr));
629 rbind->version = EAP_FAST_VERSION;
630 rbind->received_version = _bind->version;
631 rbind->subtype = EAP_TLV_CRYPTO_BINDING_SUBTYPE_RESPONSE;
632 os_memcpy(rbind->nonce, _bind->nonce, sizeof(_bind->nonce));
633 inc_byte_array(rbind->nonce, sizeof(rbind->nonce));
634 hmac_sha1(cmk, EAP_FAST_CMK_LEN, (u8 *) rbind, sizeof(*rbind),
635 rbind->compound_mac);
636
637 wpa_printf(MSG_DEBUG, "EAP-FAST: Reply Crypto-Binding TLV: Version %d "
638 "Received Version %d SubType %d",
639 rbind->version, rbind->received_version, rbind->subtype);
640 wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: NONCE",
641 rbind->nonce, sizeof(rbind->nonce));
642 wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Compound MAC",
643 rbind->compound_mac, sizeof(rbind->compound_mac));
644 }
645
646
eap_fast_get_phase2_key(struct eap_sm * sm,struct eap_fast_data * data,u8 * isk,size_t isk_len)647 static int eap_fast_get_phase2_key(struct eap_sm *sm,
648 struct eap_fast_data *data,
649 u8 *isk, size_t isk_len)
650 {
651 u8 *key;
652 size_t key_len;
653
654 os_memset(isk, 0, isk_len);
655
656 if (data->phase2_method == NULL || data->phase2_priv == NULL) {
657 wpa_printf(MSG_DEBUG, "EAP-FAST: Phase 2 method not "
658 "available");
659 return -1;
660 }
661
662 if (data->phase2_method->isKeyAvailable == NULL ||
663 data->phase2_method->getKey == NULL)
664 return 0;
665
666 if (!data->phase2_method->isKeyAvailable(sm, data->phase2_priv) ||
667 (key = data->phase2_method->getKey(sm, data->phase2_priv,
668 &key_len)) == NULL) {
669 wpa_printf(MSG_DEBUG, "EAP-FAST: Could not get key material "
670 "from Phase 2");
671 return -1;
672 }
673
674 if (key_len > isk_len)
675 key_len = isk_len;
676 if (key_len == 32 &&
677 data->phase2_method->vendor == EAP_VENDOR_IETF &&
678 data->phase2_method->method == EAP_TYPE_MSCHAPV2) {
679 /*
680 * EAP-FAST uses reverse order for MS-MPPE keys when deriving
681 * MSK from EAP-MSCHAPv2. Swap the keys here to get the correct
682 * ISK for EAP-FAST cryptobinding.
683 */
684 os_memcpy(isk, key + 16, 16);
685 os_memcpy(isk + 16, key, 16);
686 } else
687 os_memcpy(isk, key, key_len);
688 os_free(key);
689
690 return 0;
691 }
692
693
eap_fast_get_cmk(struct eap_sm * sm,struct eap_fast_data * data,u8 * cmk)694 static int eap_fast_get_cmk(struct eap_sm *sm, struct eap_fast_data *data,
695 u8 *cmk)
696 {
697 u8 isk[32], imck[60];
698
699 wpa_printf(MSG_DEBUG, "EAP-FAST: Determining CMK[%d] for Compound MIC "
700 "calculation", data->simck_idx + 1);
701
702 /*
703 * RFC 4851, Section 5.2:
704 * IMCK[j] = T-PRF(S-IMCK[j-1], "Inner Methods Compound Keys",
705 * MSK[j], 60)
706 * S-IMCK[j] = first 40 octets of IMCK[j]
707 * CMK[j] = last 20 octets of IMCK[j]
708 */
709
710 if (eap_fast_get_phase2_key(sm, data, isk, sizeof(isk)) < 0)
711 return -1;
712 wpa_hexdump_key(MSG_MSGDUMP, "EAP-FAST: ISK[j]", isk, sizeof(isk));
713 sha1_t_prf(data->simck, EAP_FAST_SIMCK_LEN,
714 "Inner Methods Compound Keys",
715 isk, sizeof(isk), imck, sizeof(imck));
716 data->simck_idx++;
717 os_memcpy(data->simck, imck, EAP_FAST_SIMCK_LEN);
718 wpa_hexdump_key(MSG_MSGDUMP, "EAP-FAST: S-IMCK[j]",
719 data->simck, EAP_FAST_SIMCK_LEN);
720 os_memcpy(cmk, imck + EAP_FAST_SIMCK_LEN, EAP_FAST_CMK_LEN);
721 wpa_hexdump_key(MSG_MSGDUMP, "EAP-FAST: CMK[j]",
722 cmk, EAP_FAST_CMK_LEN);
723
724 return 0;
725 }
726
727
eap_fast_write_pac_request(u8 * pos,u16 pac_type)728 static u8 * eap_fast_write_pac_request(u8 *pos, u16 pac_type)
729 {
730 struct eap_tlv_hdr *pac;
731 struct eap_tlv_request_action_tlv *act;
732 struct eap_tlv_pac_type_tlv *type;
733
734 act = (struct eap_tlv_request_action_tlv *) pos;
735 act->tlv_type = host_to_be16(EAP_TLV_REQUEST_ACTION_TLV);
736 act->length = host_to_be16(2);
737 act->action = host_to_be16(EAP_TLV_ACTION_PROCESS_TLV);
738
739 pac = (struct eap_tlv_hdr *) (act + 1);
740 pac->tlv_type = host_to_be16(EAP_TLV_PAC_TLV);
741 pac->length = host_to_be16(sizeof(*type));
742
743 type = (struct eap_tlv_pac_type_tlv *) (pac + 1);
744 type->tlv_type = host_to_be16(PAC_TYPE_PAC_TYPE);
745 type->length = host_to_be16(2);
746 type->pac_type = host_to_be16(pac_type);
747
748 return (u8 *) (type + 1);
749 }
750
751
eap_fast_process_crypto_binding(struct eap_sm * sm,struct eap_fast_data * data,struct eap_method_ret * ret,struct eap_tlv_crypto_binding_tlv * _bind,size_t bind_len)752 static struct wpabuf * eap_fast_process_crypto_binding(
753 struct eap_sm *sm, struct eap_fast_data *data,
754 struct eap_method_ret *ret,
755 struct eap_tlv_crypto_binding_tlv *_bind, size_t bind_len)
756 {
757 struct wpabuf *resp;
758 u8 *pos;
759 u8 cmk[EAP_FAST_CMK_LEN], cmac[SHA1_MAC_LEN];
760 int res;
761 size_t len;
762
763 if (eap_fast_validate_crypto_binding(_bind) < 0)
764 return NULL;
765
766 if (eap_fast_get_cmk(sm, data, cmk) < 0)
767 return NULL;
768
769 /* Validate received Compound MAC */
770 os_memcpy(cmac, _bind->compound_mac, sizeof(cmac));
771 os_memset(_bind->compound_mac, 0, sizeof(cmac));
772 wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Crypto-Binding TLV for Compound "
773 "MAC calculation", (u8 *) _bind, bind_len);
774 hmac_sha1(cmk, EAP_FAST_CMK_LEN, (u8 *) _bind, bind_len,
775 _bind->compound_mac);
776 res = os_memcmp_const(cmac, _bind->compound_mac, sizeof(cmac));
777 wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Received Compound MAC",
778 cmac, sizeof(cmac));
779 wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Calculated Compound MAC",
780 _bind->compound_mac, sizeof(cmac));
781 if (res != 0) {
782 wpa_printf(MSG_INFO, "EAP-FAST: Compound MAC did not match");
783 os_memcpy(_bind->compound_mac, cmac, sizeof(cmac));
784 return NULL;
785 }
786
787 /*
788 * Compound MAC was valid, so authentication succeeded. Reply with
789 * crypto binding to allow server to complete authentication.
790 */
791
792 len = sizeof(struct eap_tlv_crypto_binding_tlv);
793 resp = wpabuf_alloc(len);
794 if (resp == NULL)
795 return NULL;
796
797 if (!data->anon_provisioning && data->phase2_success &&
798 eap_fast_derive_msk(data) < 0) {
799 wpa_printf(MSG_INFO, "EAP-FAST: Failed to generate MSK");
800 ret->methodState = METHOD_DONE;
801 ret->decision = DECISION_FAIL;
802 data->phase2_success = 0;
803 wpabuf_free(resp);
804 return NULL;
805 }
806
807 if (!data->anon_provisioning && data->phase2_success) {
808 os_free(data->session_id);
809 data->session_id = eap_peer_tls_derive_session_id(
810 sm, &data->ssl, EAP_TYPE_FAST, &data->id_len);
811 if (data->session_id) {
812 wpa_hexdump(MSG_DEBUG, "EAP-FAST: Derived Session-Id",
813 data->session_id, data->id_len);
814 } else {
815 wpa_printf(MSG_ERROR, "EAP-FAST: Failed to derive "
816 "Session-Id");
817 wpabuf_free(resp);
818 return NULL;
819 }
820 }
821
822 pos = wpabuf_put(resp, sizeof(struct eap_tlv_crypto_binding_tlv));
823 eap_fast_write_crypto_binding((struct eap_tlv_crypto_binding_tlv *)
824 pos, _bind, cmk);
825
826 return resp;
827 }
828
829
eap_fast_parse_pac_tlv(struct eap_fast_pac * entry,int type,u8 * pos,size_t len,int * pac_key_found)830 static void eap_fast_parse_pac_tlv(struct eap_fast_pac *entry, int type,
831 u8 *pos, size_t len, int *pac_key_found)
832 {
833 switch (type & 0x7fff) {
834 case PAC_TYPE_PAC_KEY:
835 wpa_hexdump_key(MSG_DEBUG, "EAP-FAST: PAC-Key", pos, len);
836 if (len != EAP_FAST_PAC_KEY_LEN) {
837 wpa_printf(MSG_DEBUG, "EAP-FAST: Invalid PAC-Key "
838 "length %lu", (unsigned long) len);
839 break;
840 }
841 *pac_key_found = 1;
842 os_memcpy(entry->pac_key, pos, len);
843 break;
844 case PAC_TYPE_PAC_OPAQUE:
845 wpa_hexdump(MSG_DEBUG, "EAP-FAST: PAC-Opaque", pos, len);
846 entry->pac_opaque = pos;
847 entry->pac_opaque_len = len;
848 break;
849 case PAC_TYPE_PAC_INFO:
850 wpa_hexdump(MSG_DEBUG, "EAP-FAST: PAC-Info", pos, len);
851 entry->pac_info = pos;
852 entry->pac_info_len = len;
853 break;
854 default:
855 wpa_printf(MSG_DEBUG, "EAP-FAST: Ignored unknown PAC type %d",
856 type);
857 break;
858 }
859 }
860
861
eap_fast_process_pac_tlv(struct eap_fast_pac * entry,u8 * pac,size_t pac_len)862 static int eap_fast_process_pac_tlv(struct eap_fast_pac *entry,
863 u8 *pac, size_t pac_len)
864 {
865 struct pac_tlv_hdr *hdr;
866 u8 *pos;
867 size_t left, len;
868 int type, pac_key_found = 0;
869
870 pos = pac;
871 left = pac_len;
872
873 while (left > sizeof(*hdr)) {
874 hdr = (struct pac_tlv_hdr *) pos;
875 type = be_to_host16(hdr->type);
876 len = be_to_host16(hdr->len);
877 pos += sizeof(*hdr);
878 left -= sizeof(*hdr);
879 if (len > left) {
880 wpa_printf(MSG_DEBUG, "EAP-FAST: PAC TLV overrun "
881 "(type=%d len=%lu left=%lu)",
882 type, (unsigned long) len,
883 (unsigned long) left);
884 return -1;
885 }
886
887 eap_fast_parse_pac_tlv(entry, type, pos, len, &pac_key_found);
888
889 pos += len;
890 left -= len;
891 }
892
893 if (!pac_key_found || !entry->pac_opaque || !entry->pac_info) {
894 wpa_printf(MSG_DEBUG, "EAP-FAST: PAC TLV does not include "
895 "all the required fields");
896 return -1;
897 }
898
899 return 0;
900 }
901
902
eap_fast_parse_pac_info(struct eap_fast_pac * entry,int type,u8 * pos,size_t len)903 static int eap_fast_parse_pac_info(struct eap_fast_pac *entry, int type,
904 u8 *pos, size_t len)
905 {
906 u16 pac_type;
907 u32 lifetime;
908 struct os_time now;
909
910 switch (type & 0x7fff) {
911 case PAC_TYPE_CRED_LIFETIME:
912 if (len != 4) {
913 wpa_hexdump(MSG_DEBUG, "EAP-FAST: PAC-Info - "
914 "Invalid CRED_LIFETIME length - ignored",
915 pos, len);
916 return 0;
917 }
918
919 /*
920 * This is not currently saved separately in PAC files since
921 * the server can automatically initiate PAC update when
922 * needed. Anyway, the information is available from PAC-Info
923 * dump if it is needed for something in the future.
924 */
925 lifetime = WPA_GET_BE32(pos);
926 os_get_time(&now);
927 wpa_printf(MSG_DEBUG, "EAP-FAST: PAC-Info - CRED_LIFETIME %d "
928 "(%d days)",
929 lifetime, (lifetime - (u32) now.sec) / 86400);
930 break;
931 case PAC_TYPE_A_ID:
932 wpa_hexdump_ascii(MSG_DEBUG, "EAP-FAST: PAC-Info - A-ID",
933 pos, len);
934 entry->a_id = pos;
935 entry->a_id_len = len;
936 break;
937 case PAC_TYPE_I_ID:
938 wpa_hexdump_ascii(MSG_DEBUG, "EAP-FAST: PAC-Info - I-ID",
939 pos, len);
940 entry->i_id = pos;
941 entry->i_id_len = len;
942 break;
943 case PAC_TYPE_A_ID_INFO:
944 wpa_hexdump_ascii(MSG_DEBUG, "EAP-FAST: PAC-Info - A-ID-Info",
945 pos, len);
946 entry->a_id_info = pos;
947 entry->a_id_info_len = len;
948 break;
949 case PAC_TYPE_PAC_TYPE:
950 /* RFC 5422, Section 4.2.6 - PAC-Type TLV */
951 if (len != 2) {
952 wpa_printf(MSG_INFO, "EAP-FAST: Invalid PAC-Type "
953 "length %lu (expected 2)",
954 (unsigned long) len);
955 wpa_hexdump_ascii(MSG_DEBUG,
956 "EAP-FAST: PAC-Info - PAC-Type",
957 pos, len);
958 return -1;
959 }
960 pac_type = WPA_GET_BE16(pos);
961 if (pac_type != PAC_TYPE_TUNNEL_PAC &&
962 pac_type != PAC_TYPE_USER_AUTHORIZATION &&
963 pac_type != PAC_TYPE_MACHINE_AUTHENTICATION) {
964 wpa_printf(MSG_INFO, "EAP-FAST: Unsupported PAC Type "
965 "%d", pac_type);
966 return -1;
967 }
968
969 wpa_printf(MSG_DEBUG, "EAP-FAST: PAC-Info - PAC-Type %d",
970 pac_type);
971 entry->pac_type = pac_type;
972 break;
973 default:
974 wpa_printf(MSG_DEBUG, "EAP-FAST: Ignored unknown PAC-Info "
975 "type %d", type);
976 break;
977 }
978
979 return 0;
980 }
981
982
eap_fast_process_pac_info(struct eap_fast_pac * entry)983 static int eap_fast_process_pac_info(struct eap_fast_pac *entry)
984 {
985 struct pac_tlv_hdr *hdr;
986 u8 *pos;
987 size_t left, len;
988 int type;
989
990 /* RFC 5422, Section 4.2.4 */
991
992 /* PAC-Type defaults to Tunnel PAC (Type 1) */
993 entry->pac_type = PAC_TYPE_TUNNEL_PAC;
994
995 pos = entry->pac_info;
996 left = entry->pac_info_len;
997 while (left > sizeof(*hdr)) {
998 hdr = (struct pac_tlv_hdr *) pos;
999 type = be_to_host16(hdr->type);
1000 len = be_to_host16(hdr->len);
1001 pos += sizeof(*hdr);
1002 left -= sizeof(*hdr);
1003 if (len > left) {
1004 wpa_printf(MSG_DEBUG, "EAP-FAST: PAC-Info overrun "
1005 "(type=%d len=%lu left=%lu)",
1006 type, (unsigned long) len,
1007 (unsigned long) left);
1008 return -1;
1009 }
1010
1011 if (eap_fast_parse_pac_info(entry, type, pos, len) < 0)
1012 return -1;
1013
1014 pos += len;
1015 left -= len;
1016 }
1017
1018 if (entry->a_id == NULL || entry->a_id_info == NULL) {
1019 wpa_printf(MSG_DEBUG, "EAP-FAST: PAC-Info does not include "
1020 "all the required fields");
1021 return -1;
1022 }
1023
1024 return 0;
1025 }
1026
1027
eap_fast_process_pac(struct eap_sm * sm,struct eap_fast_data * data,struct eap_method_ret * ret,u8 * pac,size_t pac_len)1028 static struct wpabuf * eap_fast_process_pac(struct eap_sm *sm,
1029 struct eap_fast_data *data,
1030 struct eap_method_ret *ret,
1031 u8 *pac, size_t pac_len)
1032 {
1033 struct eap_peer_config *config = eap_get_config(sm);
1034 struct eap_fast_pac entry;
1035
1036 os_memset(&entry, 0, sizeof(entry));
1037 if (eap_fast_process_pac_tlv(&entry, pac, pac_len) ||
1038 eap_fast_process_pac_info(&entry))
1039 return NULL;
1040
1041 eap_fast_add_pac(&data->pac, &data->current_pac, &entry);
1042 eap_fast_pac_list_truncate(data->pac, data->max_pac_list_len);
1043 if (data->use_pac_binary_format)
1044 eap_fast_save_pac_bin(sm, data->pac, config->pac_file);
1045 else
1046 eap_fast_save_pac(sm, data->pac, config->pac_file);
1047
1048 if (data->provisioning) {
1049 if (data->anon_provisioning) {
1050 /*
1051 * Unauthenticated provisioning does not provide keying
1052 * material and must end with an EAP-Failure.
1053 * Authentication will be done separately after this.
1054 */
1055 data->success = 0;
1056 ret->decision = DECISION_FAIL;
1057 } else {
1058 /*
1059 * Server may or may not allow authenticated
1060 * provisioning also for key generation.
1061 */
1062 ret->decision = DECISION_COND_SUCC;
1063 }
1064 wpa_printf(MSG_DEBUG, "EAP-FAST: Send PAC-Acknowledgement TLV "
1065 "- Provisioning completed successfully");
1066 sm->expected_failure = 1;
1067 } else {
1068 /*
1069 * This is PAC refreshing, i.e., normal authentication that is
1070 * expected to be completed with an EAP-Success. However,
1071 * RFC 5422, Section 3.5 allows EAP-Failure to be sent even
1072 * after protected success exchange in case of EAP-Fast
1073 * provisioning, so we better use DECISION_COND_SUCC here
1074 * instead of DECISION_UNCOND_SUCC.
1075 */
1076 wpa_printf(MSG_DEBUG, "EAP-FAST: Send PAC-Acknowledgement TLV "
1077 "- PAC refreshing completed successfully");
1078 ret->decision = DECISION_COND_SUCC;
1079 }
1080 ret->methodState = METHOD_DONE;
1081 return eap_fast_tlv_pac_ack();
1082 }
1083
1084
eap_fast_parse_decrypted(struct wpabuf * decrypted,struct eap_fast_tlv_parse * tlv,struct wpabuf ** resp)1085 static int eap_fast_parse_decrypted(struct wpabuf *decrypted,
1086 struct eap_fast_tlv_parse *tlv,
1087 struct wpabuf **resp)
1088 {
1089 int mandatory, tlv_type, res;
1090 size_t len;
1091 u8 *pos, *end;
1092
1093 os_memset(tlv, 0, sizeof(*tlv));
1094
1095 /* Parse TLVs from the decrypted Phase 2 data */
1096 pos = wpabuf_mhead(decrypted);
1097 end = pos + wpabuf_len(decrypted);
1098 while (end - pos > 4) {
1099 mandatory = pos[0] & 0x80;
1100 tlv_type = WPA_GET_BE16(pos) & 0x3fff;
1101 pos += 2;
1102 len = WPA_GET_BE16(pos);
1103 pos += 2;
1104 if (len > (size_t) (end - pos)) {
1105 wpa_printf(MSG_INFO, "EAP-FAST: TLV overflow");
1106 return -1;
1107 }
1108 wpa_printf(MSG_DEBUG, "EAP-FAST: Received Phase 2: "
1109 "TLV type %d length %u%s",
1110 tlv_type, (unsigned int) len,
1111 mandatory ? " (mandatory)" : "");
1112
1113 res = eap_fast_parse_tlv(tlv, tlv_type, pos, len);
1114 if (res == -2)
1115 break;
1116 if (res < 0) {
1117 if (mandatory) {
1118 wpa_printf(MSG_DEBUG, "EAP-FAST: Nak unknown "
1119 "mandatory TLV type %d", tlv_type);
1120 *resp = eap_fast_tlv_nak(0, tlv_type);
1121 break;
1122 } else {
1123 wpa_printf(MSG_DEBUG, "EAP-FAST: ignored "
1124 "unknown optional TLV type %d",
1125 tlv_type);
1126 }
1127 }
1128
1129 pos += len;
1130 }
1131
1132 return 0;
1133 }
1134
1135
eap_fast_encrypt_response(struct eap_sm * sm,struct eap_fast_data * data,struct wpabuf * resp,u8 identifier,struct wpabuf ** out_data)1136 static int eap_fast_encrypt_response(struct eap_sm *sm,
1137 struct eap_fast_data *data,
1138 struct wpabuf *resp,
1139 u8 identifier, struct wpabuf **out_data)
1140 {
1141 if (resp == NULL)
1142 return 0;
1143
1144 wpa_hexdump_buf(MSG_DEBUG, "EAP-FAST: Encrypting Phase 2 data",
1145 resp);
1146 if (eap_peer_tls_encrypt(sm, &data->ssl, EAP_TYPE_FAST,
1147 data->fast_version, identifier,
1148 resp, out_data)) {
1149 wpa_printf(MSG_INFO, "EAP-FAST: Failed to encrypt a Phase 2 "
1150 "frame");
1151 }
1152 wpabuf_free(resp);
1153
1154 return 0;
1155 }
1156
1157
eap_fast_pac_request(void)1158 static struct wpabuf * eap_fast_pac_request(void)
1159 {
1160 struct wpabuf *tmp;
1161 u8 *pos, *pos2;
1162
1163 tmp = wpabuf_alloc(sizeof(struct eap_tlv_hdr) +
1164 sizeof(struct eap_tlv_request_action_tlv) +
1165 sizeof(struct eap_tlv_pac_type_tlv));
1166 if (tmp == NULL)
1167 return NULL;
1168
1169 pos = wpabuf_put(tmp, 0);
1170 pos2 = eap_fast_write_pac_request(pos, PAC_TYPE_TUNNEL_PAC);
1171 wpabuf_put(tmp, pos2 - pos);
1172 return tmp;
1173 }
1174
1175
eap_fast_process_decrypted(struct eap_sm * sm,struct eap_fast_data * data,struct eap_method_ret * ret,u8 identifier,struct wpabuf * decrypted,struct wpabuf ** out_data)1176 static int eap_fast_process_decrypted(struct eap_sm *sm,
1177 struct eap_fast_data *data,
1178 struct eap_method_ret *ret,
1179 u8 identifier,
1180 struct wpabuf *decrypted,
1181 struct wpabuf **out_data)
1182 {
1183 struct wpabuf *resp = NULL, *tmp;
1184 struct eap_fast_tlv_parse tlv;
1185 int failed = 0;
1186
1187 if (eap_fast_parse_decrypted(decrypted, &tlv, &resp) < 0)
1188 return 0;
1189 if (resp)
1190 return eap_fast_encrypt_response(sm, data, resp,
1191 identifier, out_data);
1192
1193 if (tlv.result == EAP_TLV_RESULT_FAILURE) {
1194 resp = eap_fast_tlv_result(EAP_TLV_RESULT_FAILURE, 0);
1195 return eap_fast_encrypt_response(sm, data, resp,
1196 identifier, out_data);
1197 }
1198
1199 if (tlv.iresult == EAP_TLV_RESULT_FAILURE) {
1200 resp = eap_fast_tlv_result(EAP_TLV_RESULT_FAILURE, 1);
1201 return eap_fast_encrypt_response(sm, data, resp,
1202 identifier, out_data);
1203 }
1204
1205 if (tlv.crypto_binding) {
1206 tmp = eap_fast_process_crypto_binding(sm, data, ret,
1207 tlv.crypto_binding,
1208 tlv.crypto_binding_len);
1209 if (tmp == NULL)
1210 failed = 1;
1211 else
1212 resp = wpabuf_concat(resp, tmp);
1213 }
1214
1215 if (tlv.iresult == EAP_TLV_RESULT_SUCCESS) {
1216 tmp = eap_fast_tlv_result(failed ? EAP_TLV_RESULT_FAILURE :
1217 EAP_TLV_RESULT_SUCCESS, 1);
1218 resp = wpabuf_concat(resp, tmp);
1219 }
1220
1221 if (tlv.eap_payload_tlv) {
1222 tmp = eap_fast_process_eap_payload_tlv(
1223 sm, data, ret, tlv.eap_payload_tlv,
1224 tlv.eap_payload_tlv_len);
1225 resp = wpabuf_concat(resp, tmp);
1226 }
1227
1228 if (tlv.pac && tlv.result != EAP_TLV_RESULT_SUCCESS) {
1229 wpa_printf(MSG_DEBUG, "EAP-FAST: PAC TLV without Result TLV "
1230 "acknowledging success");
1231 failed = 1;
1232 } else if (tlv.pac && tlv.result == EAP_TLV_RESULT_SUCCESS) {
1233 tmp = eap_fast_process_pac(sm, data, ret, tlv.pac,
1234 tlv.pac_len);
1235 resp = wpabuf_concat(resp, tmp);
1236 }
1237
1238 if (data->current_pac == NULL && data->provisioning &&
1239 !data->anon_provisioning && !tlv.pac &&
1240 (tlv.iresult == EAP_TLV_RESULT_SUCCESS ||
1241 tlv.result == EAP_TLV_RESULT_SUCCESS)) {
1242 /*
1243 * Need to request Tunnel PAC when using authenticated
1244 * provisioning.
1245 */
1246 wpa_printf(MSG_DEBUG, "EAP-FAST: Request Tunnel PAC");
1247 tmp = eap_fast_pac_request();
1248 resp = wpabuf_concat(resp, tmp);
1249 }
1250
1251 if (tlv.result == EAP_TLV_RESULT_SUCCESS && !failed) {
1252 tmp = eap_fast_tlv_result(EAP_TLV_RESULT_SUCCESS, 0);
1253 resp = wpabuf_concat(tmp, resp);
1254 } else if (failed) {
1255 tmp = eap_fast_tlv_result(EAP_TLV_RESULT_FAILURE, 0);
1256 resp = wpabuf_concat(tmp, resp);
1257 }
1258
1259 if (resp && tlv.result == EAP_TLV_RESULT_SUCCESS && !failed &&
1260 tlv.crypto_binding && data->phase2_success) {
1261 if (data->anon_provisioning) {
1262 wpa_printf(MSG_DEBUG, "EAP-FAST: Unauthenticated "
1263 "provisioning completed successfully.");
1264 ret->methodState = METHOD_DONE;
1265 ret->decision = DECISION_FAIL;
1266 sm->expected_failure = 1;
1267 } else {
1268 wpa_printf(MSG_DEBUG, "EAP-FAST: Authentication "
1269 "completed successfully.");
1270 if (data->provisioning)
1271 ret->methodState = METHOD_MAY_CONT;
1272 else
1273 ret->methodState = METHOD_DONE;
1274 ret->decision = DECISION_UNCOND_SUCC;
1275 }
1276 }
1277
1278 if (resp == NULL) {
1279 wpa_printf(MSG_DEBUG, "EAP-FAST: No recognized TLVs - send "
1280 "empty response packet");
1281 resp = wpabuf_alloc(1);
1282 }
1283
1284 return eap_fast_encrypt_response(sm, data, resp, identifier,
1285 out_data);
1286 }
1287
1288
eap_fast_decrypt(struct eap_sm * sm,struct eap_fast_data * data,struct eap_method_ret * ret,u8 identifier,const struct wpabuf * in_data,struct wpabuf ** out_data)1289 static int eap_fast_decrypt(struct eap_sm *sm, struct eap_fast_data *data,
1290 struct eap_method_ret *ret, u8 identifier,
1291 const struct wpabuf *in_data,
1292 struct wpabuf **out_data)
1293 {
1294 struct wpabuf *in_decrypted;
1295 int res;
1296
1297 wpa_printf(MSG_DEBUG, "EAP-FAST: Received %lu bytes encrypted data for"
1298 " Phase 2", (unsigned long) wpabuf_len(in_data));
1299
1300 if (data->pending_phase2_req) {
1301 wpa_printf(MSG_DEBUG, "EAP-FAST: Pending Phase 2 request - "
1302 "skip decryption and use old data");
1303 /* Clear TLS reassembly state. */
1304 eap_peer_tls_reset_input(&data->ssl);
1305
1306 in_decrypted = data->pending_phase2_req;
1307 data->pending_phase2_req = NULL;
1308 goto continue_req;
1309 }
1310
1311 if (wpabuf_len(in_data) == 0) {
1312 /* Received TLS ACK - requesting more fragments */
1313 return eap_peer_tls_encrypt(sm, &data->ssl, EAP_TYPE_FAST,
1314 data->fast_version,
1315 identifier, NULL, out_data);
1316 }
1317
1318 res = eap_peer_tls_decrypt(sm, &data->ssl, in_data, &in_decrypted);
1319 if (res)
1320 return res;
1321
1322 continue_req:
1323 wpa_hexdump_buf(MSG_MSGDUMP, "EAP-FAST: Decrypted Phase 2 TLV(s)",
1324 in_decrypted);
1325
1326 if (wpabuf_len(in_decrypted) < 4) {
1327 wpa_printf(MSG_INFO, "EAP-FAST: Too short Phase 2 "
1328 "TLV frame (len=%lu)",
1329 (unsigned long) wpabuf_len(in_decrypted));
1330 wpabuf_free(in_decrypted);
1331 return -1;
1332 }
1333
1334 res = eap_fast_process_decrypted(sm, data, ret, identifier,
1335 in_decrypted, out_data);
1336
1337 wpabuf_free(in_decrypted);
1338
1339 return res;
1340 }
1341
1342
eap_fast_get_a_id(const u8 * buf,size_t len,size_t * id_len)1343 static const u8 * eap_fast_get_a_id(const u8 *buf, size_t len, size_t *id_len)
1344 {
1345 const u8 *a_id;
1346 const struct pac_tlv_hdr *hdr;
1347
1348 /*
1349 * Parse authority identity (A-ID) from the EAP-FAST/Start. This
1350 * supports both raw A-ID and one inside an A-ID TLV.
1351 */
1352 a_id = buf;
1353 *id_len = len;
1354 if (len > sizeof(*hdr)) {
1355 int tlen;
1356 hdr = (const struct pac_tlv_hdr *) buf;
1357 tlen = be_to_host16(hdr->len);
1358 if (be_to_host16(hdr->type) == PAC_TYPE_A_ID &&
1359 sizeof(*hdr) + tlen <= len) {
1360 wpa_printf(MSG_DEBUG, "EAP-FAST: A-ID was in TLV "
1361 "(Start)");
1362 a_id = (const u8 *) (hdr + 1);
1363 *id_len = tlen;
1364 }
1365 }
1366 wpa_hexdump_ascii(MSG_DEBUG, "EAP-FAST: A-ID", a_id, *id_len);
1367
1368 return a_id;
1369 }
1370
1371
eap_fast_select_pac(struct eap_fast_data * data,const u8 * a_id,size_t a_id_len)1372 static void eap_fast_select_pac(struct eap_fast_data *data,
1373 const u8 *a_id, size_t a_id_len)
1374 {
1375 data->current_pac = eap_fast_get_pac(data->pac, a_id, a_id_len,
1376 PAC_TYPE_TUNNEL_PAC);
1377 if (data->current_pac == NULL) {
1378 /*
1379 * Tunnel PAC was not available for this A-ID. Try to use
1380 * Machine Authentication PAC, if one is available.
1381 */
1382 data->current_pac = eap_fast_get_pac(
1383 data->pac, a_id, a_id_len,
1384 PAC_TYPE_MACHINE_AUTHENTICATION);
1385 }
1386
1387 if (data->current_pac) {
1388 wpa_printf(MSG_DEBUG, "EAP-FAST: PAC found for this A-ID "
1389 "(PAC-Type %d)", data->current_pac->pac_type);
1390 wpa_hexdump_ascii(MSG_MSGDUMP, "EAP-FAST: A-ID-Info",
1391 data->current_pac->a_id_info,
1392 data->current_pac->a_id_info_len);
1393 }
1394 }
1395
1396
eap_fast_use_pac_opaque(struct eap_sm * sm,struct eap_fast_data * data,struct eap_fast_pac * pac)1397 static int eap_fast_use_pac_opaque(struct eap_sm *sm,
1398 struct eap_fast_data *data,
1399 struct eap_fast_pac *pac)
1400 {
1401 u8 *tlv;
1402 size_t tlv_len, olen;
1403 struct eap_tlv_hdr *ehdr;
1404
1405 olen = pac->pac_opaque_len;
1406 tlv_len = sizeof(*ehdr) + olen;
1407 tlv = os_malloc(tlv_len);
1408 if (tlv) {
1409 ehdr = (struct eap_tlv_hdr *) tlv;
1410 ehdr->tlv_type = host_to_be16(PAC_TYPE_PAC_OPAQUE);
1411 ehdr->length = host_to_be16(olen);
1412 os_memcpy(ehdr + 1, pac->pac_opaque, olen);
1413 }
1414 if (tlv == NULL ||
1415 tls_connection_client_hello_ext(sm->ssl_ctx, data->ssl.conn,
1416 TLS_EXT_PAC_OPAQUE,
1417 tlv, tlv_len) < 0) {
1418 wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to add PAC-Opaque TLS "
1419 "extension");
1420 os_free(tlv);
1421 return -1;
1422 }
1423 os_free(tlv);
1424
1425 return 0;
1426 }
1427
1428
eap_fast_clear_pac_opaque_ext(struct eap_sm * sm,struct eap_fast_data * data)1429 static int eap_fast_clear_pac_opaque_ext(struct eap_sm *sm,
1430 struct eap_fast_data *data)
1431 {
1432 if (tls_connection_client_hello_ext(sm->ssl_ctx, data->ssl.conn,
1433 TLS_EXT_PAC_OPAQUE, NULL, 0) < 0) {
1434 wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to remove PAC-Opaque "
1435 "TLS extension");
1436 return -1;
1437 }
1438 return 0;
1439 }
1440
1441
eap_fast_set_provisioning_ciphers(struct eap_sm * sm,struct eap_fast_data * data)1442 static int eap_fast_set_provisioning_ciphers(struct eap_sm *sm,
1443 struct eap_fast_data *data)
1444 {
1445 u8 ciphers[7];
1446 int count = 0;
1447
1448 if (data->provisioning_allowed & EAP_FAST_PROV_UNAUTH) {
1449 wpa_printf(MSG_DEBUG, "EAP-FAST: Enabling unauthenticated "
1450 "provisioning TLS cipher suites");
1451 ciphers[count++] = TLS_CIPHER_ANON_DH_AES128_SHA;
1452 }
1453
1454 if (data->provisioning_allowed & EAP_FAST_PROV_AUTH) {
1455 wpa_printf(MSG_DEBUG, "EAP-FAST: Enabling authenticated "
1456 "provisioning TLS cipher suites");
1457 ciphers[count++] = TLS_CIPHER_RSA_DHE_AES256_SHA;
1458 ciphers[count++] = TLS_CIPHER_RSA_DHE_AES128_SHA;
1459 ciphers[count++] = TLS_CIPHER_AES256_SHA;
1460 ciphers[count++] = TLS_CIPHER_AES128_SHA;
1461 ciphers[count++] = TLS_CIPHER_RC4_SHA;
1462 }
1463
1464 ciphers[count++] = TLS_CIPHER_NONE;
1465
1466 if (tls_connection_set_cipher_list(sm->ssl_ctx, data->ssl.conn,
1467 ciphers)) {
1468 wpa_printf(MSG_INFO, "EAP-FAST: Could not configure TLS "
1469 "cipher suites for provisioning");
1470 return -1;
1471 }
1472
1473 return 0;
1474 }
1475
1476
eap_fast_process_start(struct eap_sm * sm,struct eap_fast_data * data,u8 flags,const u8 * pos,size_t left)1477 static int eap_fast_process_start(struct eap_sm *sm,
1478 struct eap_fast_data *data, u8 flags,
1479 const u8 *pos, size_t left)
1480 {
1481 const u8 *a_id;
1482 size_t a_id_len;
1483
1484 /* EAP-FAST Version negotiation (section 3.1) */
1485 wpa_printf(MSG_DEBUG, "EAP-FAST: Start (server ver=%d, own ver=%d)",
1486 flags & EAP_TLS_VERSION_MASK, data->fast_version);
1487 if ((flags & EAP_TLS_VERSION_MASK) < data->fast_version)
1488 data->fast_version = flags & EAP_TLS_VERSION_MASK;
1489 wpa_printf(MSG_DEBUG, "EAP-FAST: Using FAST version %d",
1490 data->fast_version);
1491
1492 a_id = eap_fast_get_a_id(pos, left, &a_id_len);
1493 eap_fast_select_pac(data, a_id, a_id_len);
1494
1495 if (data->resuming && data->current_pac) {
1496 wpa_printf(MSG_DEBUG, "EAP-FAST: Trying to resume session - "
1497 "do not add PAC-Opaque to TLS ClientHello");
1498 if (eap_fast_clear_pac_opaque_ext(sm, data) < 0)
1499 return -1;
1500 } else if (data->current_pac) {
1501 /*
1502 * PAC found for the A-ID and we are not resuming an old
1503 * session, so add PAC-Opaque extension to ClientHello.
1504 */
1505 if (eap_fast_use_pac_opaque(sm, data, data->current_pac) < 0)
1506 return -1;
1507 } else {
1508 /* No PAC found, so we must provision one. */
1509 if (!data->provisioning_allowed) {
1510 wpa_printf(MSG_DEBUG, "EAP-FAST: No PAC found and "
1511 "provisioning disabled");
1512 return -1;
1513 }
1514 wpa_printf(MSG_DEBUG, "EAP-FAST: No PAC found - "
1515 "starting provisioning");
1516 if (eap_fast_set_provisioning_ciphers(sm, data) < 0 ||
1517 eap_fast_clear_pac_opaque_ext(sm, data) < 0)
1518 return -1;
1519 data->provisioning = 1;
1520 }
1521
1522 return 0;
1523 }
1524
1525
eap_fast_process(struct eap_sm * sm,void * priv,struct eap_method_ret * ret,const struct wpabuf * reqData)1526 static struct wpabuf * eap_fast_process(struct eap_sm *sm, void *priv,
1527 struct eap_method_ret *ret,
1528 const struct wpabuf *reqData)
1529 {
1530 const struct eap_hdr *req;
1531 size_t left;
1532 int res;
1533 u8 flags, id;
1534 struct wpabuf *resp;
1535 const u8 *pos;
1536 struct eap_fast_data *data = priv;
1537 struct wpabuf msg;
1538
1539 pos = eap_peer_tls_process_init(sm, &data->ssl, EAP_TYPE_FAST, ret,
1540 reqData, &left, &flags);
1541 if (pos == NULL)
1542 return NULL;
1543
1544 req = wpabuf_head(reqData);
1545 id = req->identifier;
1546
1547 if (flags & EAP_TLS_FLAGS_START) {
1548 if (eap_fast_process_start(sm, data, flags, pos, left) < 0)
1549 return NULL;
1550
1551 left = 0; /* A-ID is not used in further packet processing */
1552 }
1553
1554 wpabuf_set(&msg, pos, left);
1555
1556 resp = NULL;
1557 if (tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
1558 !data->resuming) {
1559 /* Process tunneled (encrypted) phase 2 data. */
1560 res = eap_fast_decrypt(sm, data, ret, id, &msg, &resp);
1561 if (res < 0) {
1562 ret->methodState = METHOD_DONE;
1563 ret->decision = DECISION_FAIL;
1564 /*
1565 * Ack possible Alert that may have caused failure in
1566 * decryption.
1567 */
1568 res = 1;
1569 }
1570 } else {
1571 if (sm->waiting_ext_cert_check && data->pending_resp) {
1572 struct eap_peer_config *config = eap_get_config(sm);
1573
1574 if (config->pending_ext_cert_check ==
1575 EXT_CERT_CHECK_GOOD) {
1576 wpa_printf(MSG_DEBUG,
1577 "EAP-FAST: External certificate check succeeded - continue handshake");
1578 resp = data->pending_resp;
1579 data->pending_resp = NULL;
1580 sm->waiting_ext_cert_check = 0;
1581 return resp;
1582 }
1583
1584 if (config->pending_ext_cert_check ==
1585 EXT_CERT_CHECK_BAD) {
1586 wpa_printf(MSG_DEBUG,
1587 "EAP-FAST: External certificate check failed - force authentication failure");
1588 ret->methodState = METHOD_DONE;
1589 ret->decision = DECISION_FAIL;
1590 sm->waiting_ext_cert_check = 0;
1591 return NULL;
1592 }
1593
1594 wpa_printf(MSG_DEBUG,
1595 "EAP-FAST: Continuing to wait external server certificate validation");
1596 return NULL;
1597 }
1598
1599 /* Continue processing TLS handshake (phase 1). */
1600 res = eap_peer_tls_process_helper(sm, &data->ssl,
1601 EAP_TYPE_FAST,
1602 data->fast_version, id, &msg,
1603 &resp);
1604 if (res < 0) {
1605 wpa_printf(MSG_DEBUG,
1606 "EAP-FAST: TLS processing failed");
1607 ret->methodState = METHOD_DONE;
1608 ret->decision = DECISION_FAIL;
1609 return resp;
1610 }
1611
1612 if (sm->waiting_ext_cert_check) {
1613 wpa_printf(MSG_DEBUG,
1614 "EAP-FAST: Waiting external server certificate validation");
1615 wpabuf_free(data->pending_resp);
1616 data->pending_resp = resp;
1617 return NULL;
1618 }
1619
1620 if (tls_connection_established(sm->ssl_ctx, data->ssl.conn)) {
1621 char cipher[80];
1622 wpa_printf(MSG_DEBUG,
1623 "EAP-FAST: TLS done, proceed to Phase 2");
1624 if (data->provisioning &&
1625 (!(data->provisioning_allowed &
1626 EAP_FAST_PROV_AUTH) ||
1627 tls_get_cipher(sm->ssl_ctx, data->ssl.conn,
1628 cipher, sizeof(cipher)) < 0 ||
1629 os_strstr(cipher, "ADH-") ||
1630 os_strstr(cipher, "anon"))) {
1631 wpa_printf(MSG_DEBUG, "EAP-FAST: Using "
1632 "anonymous (unauthenticated) "
1633 "provisioning");
1634 data->anon_provisioning = 1;
1635 } else
1636 data->anon_provisioning = 0;
1637 data->resuming = 0;
1638 if (eap_fast_derive_keys(sm, data) < 0) {
1639 wpa_printf(MSG_DEBUG,
1640 "EAP-FAST: Could not derive keys");
1641 ret->methodState = METHOD_DONE;
1642 ret->decision = DECISION_FAIL;
1643 wpabuf_free(resp);
1644 return NULL;
1645 }
1646 }
1647
1648 if (res == 2) {
1649 /*
1650 * Application data included in the handshake message.
1651 */
1652 wpabuf_free(data->pending_phase2_req);
1653 data->pending_phase2_req = resp;
1654 resp = NULL;
1655 res = eap_fast_decrypt(sm, data, ret, id, &msg, &resp);
1656 }
1657 }
1658
1659 if (res == 1) {
1660 wpabuf_free(resp);
1661 return eap_peer_tls_build_ack(id, EAP_TYPE_FAST,
1662 data->fast_version);
1663 }
1664
1665 return resp;
1666 }
1667
1668
1669 #if 0 /* FIX */
1670 static Boolean eap_fast_has_reauth_data(struct eap_sm *sm, void *priv)
1671 {
1672 struct eap_fast_data *data = priv;
1673 return tls_connection_established(sm->ssl_ctx, data->ssl.conn);
1674 }
1675
1676
1677 static void eap_fast_deinit_for_reauth(struct eap_sm *sm, void *priv)
1678 {
1679 struct eap_fast_data *data = priv;
1680 os_free(data->key_block_p);
1681 data->key_block_p = NULL;
1682 wpabuf_free(data->pending_phase2_req);
1683 data->pending_phase2_req = NULL;
1684 wpabuf_free(data->pending_resp);
1685 data->pending_resp = NULL;
1686 }
1687
1688
1689 static void * eap_fast_init_for_reauth(struct eap_sm *sm, void *priv)
1690 {
1691 struct eap_fast_data *data = priv;
1692 if (eap_peer_tls_reauth_init(sm, &data->ssl)) {
1693 os_free(data);
1694 return NULL;
1695 }
1696 os_memset(data->key_data, 0, EAP_FAST_KEY_LEN);
1697 os_memset(data->emsk, 0, EAP_EMSK_LEN);
1698 os_free(data->session_id);
1699 data->session_id = NULL;
1700 if (data->phase2_priv && data->phase2_method &&
1701 data->phase2_method->init_for_reauth)
1702 data->phase2_method->init_for_reauth(sm, data->phase2_priv);
1703 data->phase2_success = 0;
1704 data->resuming = 1;
1705 data->provisioning = 0;
1706 data->anon_provisioning = 0;
1707 data->simck_idx = 0;
1708 return priv;
1709 }
1710 #endif
1711
1712
eap_fast_get_status(struct eap_sm * sm,void * priv,char * buf,size_t buflen,int verbose)1713 static int eap_fast_get_status(struct eap_sm *sm, void *priv, char *buf,
1714 size_t buflen, int verbose)
1715 {
1716 struct eap_fast_data *data = priv;
1717 int len, ret;
1718
1719 len = eap_peer_tls_status(sm, &data->ssl, buf, buflen, verbose);
1720 if (data->phase2_method) {
1721 ret = os_snprintf(buf + len, buflen - len,
1722 "EAP-FAST Phase2 method=%s\n",
1723 data->phase2_method->name);
1724 if (os_snprintf_error(buflen - len, ret))
1725 return len;
1726 len += ret;
1727 }
1728 return len;
1729 }
1730
1731
eap_fast_isKeyAvailable(struct eap_sm * sm,void * priv)1732 static Boolean eap_fast_isKeyAvailable(struct eap_sm *sm, void *priv)
1733 {
1734 struct eap_fast_data *data = priv;
1735 return data->success;
1736 }
1737
1738
eap_fast_getKey(struct eap_sm * sm,void * priv,size_t * len)1739 static u8 * eap_fast_getKey(struct eap_sm *sm, void *priv, size_t *len)
1740 {
1741 struct eap_fast_data *data = priv;
1742 u8 *key;
1743
1744 if (!data->success)
1745 return NULL;
1746
1747 key = os_malloc(EAP_FAST_KEY_LEN);
1748 if (key == NULL)
1749 return NULL;
1750
1751 *len = EAP_FAST_KEY_LEN;
1752 os_memcpy(key, data->key_data, EAP_FAST_KEY_LEN);
1753
1754 return key;
1755 }
1756
1757
eap_fast_get_session_id(struct eap_sm * sm,void * priv,size_t * len)1758 static u8 * eap_fast_get_session_id(struct eap_sm *sm, void *priv, size_t *len)
1759 {
1760 struct eap_fast_data *data = priv;
1761 u8 *id;
1762
1763 if (!data->success || !data->session_id)
1764 return NULL;
1765
1766 id = os_malloc(data->id_len);
1767 if (id == NULL)
1768 return NULL;
1769
1770 *len = data->id_len;
1771 os_memcpy(id, data->session_id, data->id_len);
1772
1773 return id;
1774 }
1775
1776
eap_fast_get_emsk(struct eap_sm * sm,void * priv,size_t * len)1777 static u8 * eap_fast_get_emsk(struct eap_sm *sm, void *priv, size_t *len)
1778 {
1779 struct eap_fast_data *data = priv;
1780 u8 *key;
1781
1782 if (!data->success)
1783 return NULL;
1784
1785 key = os_malloc(EAP_EMSK_LEN);
1786 if (key == NULL)
1787 return NULL;
1788
1789 *len = EAP_EMSK_LEN;
1790 os_memcpy(key, data->emsk, EAP_EMSK_LEN);
1791
1792 return key;
1793 }
1794
1795
eap_peer_fast_register(void)1796 int eap_peer_fast_register(void)
1797 {
1798 struct eap_method *eap;
1799
1800 eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
1801 EAP_VENDOR_IETF, EAP_TYPE_FAST, "FAST");
1802 if (eap == NULL)
1803 return -1;
1804
1805 eap->init = eap_fast_init;
1806 eap->deinit = eap_fast_deinit;
1807 eap->process = eap_fast_process;
1808 eap->isKeyAvailable = eap_fast_isKeyAvailable;
1809 eap->getKey = eap_fast_getKey;
1810 eap->getSessionId = eap_fast_get_session_id;
1811 eap->get_status = eap_fast_get_status;
1812 #if 0
1813 eap->has_reauth_data = eap_fast_has_reauth_data;
1814 eap->deinit_for_reauth = eap_fast_deinit_for_reauth;
1815 eap->init_for_reauth = eap_fast_init_for_reauth;
1816 #endif
1817 eap->get_emsk = eap_fast_get_emsk;
1818
1819 return eap_peer_method_register(eap);
1820 }
1821