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