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) < 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_clear_free(data->pending_phase2_req);
254 wpabuf_clear_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,
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 sizeof(*data->key_block_p));
307 if (data->key_block_p == NULL) {
308 wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to derive key block");
309 return -1;
310 }
311 /*
312 * RFC 4851, Section 5.2:
313 * S-IMCK[0] = session_key_seed
314 */
315 wpa_hexdump_key(MSG_DEBUG,
316 "EAP-FAST: session_key_seed (SKS = S-IMCK[0])",
317 data->key_block_p->session_key_seed,
318 sizeof(data->key_block_p->session_key_seed));
319 data->simck_idx = 0;
320 os_memcpy(data->simck, data->key_block_p->session_key_seed,
321 EAP_FAST_SIMCK_LEN);
322 wpa_hexdump_key(MSG_DEBUG, "EAP-FAST: server_challenge",
323 data->key_block_p->server_challenge,
324 sizeof(data->key_block_p->server_challenge));
325 wpa_hexdump_key(MSG_DEBUG, "EAP-FAST: client_challenge",
326 data->key_block_p->client_challenge,
327 sizeof(data->key_block_p->client_challenge));
328 return 0;
329 }
330
331
eap_fast_derive_keys(struct eap_sm * sm,struct eap_fast_data * data)332 static int eap_fast_derive_keys(struct eap_sm *sm, struct eap_fast_data *data)
333 {
334 int res;
335
336 if (data->anon_provisioning)
337 res = eap_fast_derive_key_provisioning(sm, data);
338 else
339 res = eap_fast_derive_key_auth(sm, data);
340 return res;
341 }
342
343
eap_fast_init_phase2_method(struct eap_sm * sm,struct eap_fast_data * data)344 static int eap_fast_init_phase2_method(struct eap_sm *sm,
345 struct eap_fast_data *data)
346 {
347 data->phase2_method =
348 eap_peer_get_eap_method(data->phase2_type.vendor,
349 data->phase2_type.method);
350 if (data->phase2_method == NULL)
351 return -1;
352
353 if (data->key_block_p) {
354 sm->auth_challenge = data->key_block_p->server_challenge;
355 sm->peer_challenge = data->key_block_p->client_challenge;
356 }
357 sm->init_phase2 = 1;
358 data->phase2_priv = data->phase2_method->init(sm);
359 sm->init_phase2 = 0;
360 sm->auth_challenge = NULL;
361 sm->peer_challenge = NULL;
362
363 return data->phase2_priv == NULL ? -1 : 0;
364 }
365
366
eap_fast_select_phase2_method(struct eap_fast_data * data,int vendor,enum eap_type type)367 static int eap_fast_select_phase2_method(struct eap_fast_data *data,
368 int vendor, enum eap_type 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 &&
376 (vendor != EAP_VENDOR_IETF || type != EAP_TYPE_MSCHAPV2)) {
377 wpa_printf(MSG_INFO,
378 "EAP-FAST: Only EAP-MSCHAPv2 is allowed during unauthenticated provisioning; reject phase2 type %u:%u",
379 vendor, type);
380 return -1;
381 }
382
383 #ifdef EAP_TNC
384 if (vendor == EAP_VENDOR_IETF && type == EAP_TYPE_TNC) {
385 data->phase2_type.vendor = EAP_VENDOR_IETF;
386 data->phase2_type.method = EAP_TYPE_TNC;
387 wpa_printf(MSG_DEBUG, "EAP-FAST: Selected Phase 2 EAP "
388 "vendor %d method %d for TNC",
389 data->phase2_type.vendor,
390 data->phase2_type.method);
391 return 0;
392 }
393 #endif /* EAP_TNC */
394
395 for (i = 0; i < data->num_phase2_types; i++) {
396 if (data->phase2_types[i].vendor != vendor ||
397 data->phase2_types[i].method != type)
398 continue;
399
400 data->phase2_type.vendor = data->phase2_types[i].vendor;
401 data->phase2_type.method = data->phase2_types[i].method;
402 wpa_printf(MSG_DEBUG, "EAP-FAST: Selected Phase 2 EAP "
403 "vendor %d method %d",
404 data->phase2_type.vendor,
405 data->phase2_type.method);
406 break;
407 }
408
409 if (vendor != data->phase2_type.vendor ||
410 type != data->phase2_type.method ||
411 (vendor == EAP_VENDOR_IETF && type == EAP_TYPE_NONE))
412 return -1;
413
414 return 0;
415 }
416
417
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)418 static int eap_fast_phase2_request(struct eap_sm *sm,
419 struct eap_fast_data *data,
420 struct eap_method_ret *ret,
421 struct eap_hdr *hdr,
422 struct wpabuf **resp)
423 {
424 size_t len = be_to_host16(hdr->length);
425 u8 *pos;
426 struct eap_method_ret iret;
427 struct eap_peer_config *config = eap_get_config(sm);
428 struct wpabuf msg;
429 int vendor = EAP_VENDOR_IETF;
430 enum eap_type method;
431
432 if (len <= sizeof(struct eap_hdr)) {
433 wpa_printf(MSG_INFO, "EAP-FAST: too short "
434 "Phase 2 request (len=%lu)", (unsigned long) len);
435 return -1;
436 }
437 pos = (u8 *) (hdr + 1);
438 method = *pos;
439 if (method == EAP_TYPE_EXPANDED) {
440 if (len < sizeof(struct eap_hdr) + 8) {
441 wpa_printf(MSG_INFO,
442 "EAP-FAST: Too short Phase 2 request (expanded header) (len=%lu)",
443 (unsigned long) len);
444 return -1;
445 }
446 vendor = WPA_GET_BE24(pos + 1);
447 method = WPA_GET_BE32(pos + 4);
448 }
449 wpa_printf(MSG_DEBUG, "EAP-FAST: Phase 2 Request: type=%u:%u",
450 vendor, method);
451 if (vendor == EAP_VENDOR_IETF && method == EAP_TYPE_IDENTITY) {
452 *resp = eap_sm_buildIdentity(sm, hdr->identifier, 1);
453 return 0;
454 }
455
456 if (data->phase2_priv && data->phase2_method &&
457 (vendor != data->phase2_type.vendor ||
458 method != data->phase2_type.method)) {
459 wpa_printf(MSG_DEBUG, "EAP-FAST: Phase 2 EAP sequence - "
460 "deinitialize previous method");
461 data->phase2_method->deinit(sm, data->phase2_priv);
462 data->phase2_method = NULL;
463 data->phase2_priv = NULL;
464 data->phase2_type.vendor = EAP_VENDOR_IETF;
465 data->phase2_type.method = EAP_TYPE_NONE;
466 }
467
468 if (data->phase2_type.vendor == EAP_VENDOR_IETF &&
469 data->phase2_type.method == EAP_TYPE_NONE &&
470 eap_fast_select_phase2_method(data, vendor, method) < 0) {
471 if (eap_peer_tls_phase2_nak(data->phase2_types,
472 data->num_phase2_types,
473 hdr, resp))
474 return -1;
475 return 0;
476 }
477
478 if ((data->phase2_priv == NULL &&
479 eap_fast_init_phase2_method(sm, data) < 0) ||
480 data->phase2_method == NULL) {
481 wpa_printf(MSG_INFO,
482 "EAP-FAST: Failed to initialize Phase 2 EAP method %u:%u",
483 vendor, method);
484 ret->methodState = METHOD_DONE;
485 ret->decision = DECISION_FAIL;
486 return -1;
487 }
488
489 os_memset(&iret, 0, sizeof(iret));
490 wpabuf_set(&msg, hdr, len);
491 *resp = data->phase2_method->process(sm, data->phase2_priv, &iret,
492 &msg);
493 if (*resp == NULL ||
494 (iret.methodState == METHOD_DONE &&
495 iret.decision == DECISION_FAIL)) {
496 ret->methodState = METHOD_DONE;
497 ret->decision = DECISION_FAIL;
498 } else if ((iret.methodState == METHOD_DONE ||
499 iret.methodState == METHOD_MAY_CONT) &&
500 (iret.decision == DECISION_UNCOND_SUCC ||
501 iret.decision == DECISION_COND_SUCC)) {
502 data->phase2_success = 1;
503 }
504
505 if (*resp == NULL && config &&
506 (config->pending_req_identity || config->pending_req_password ||
507 config->pending_req_otp || config->pending_req_new_password ||
508 config->pending_req_sim)) {
509 wpabuf_clear_free(data->pending_phase2_req);
510 data->pending_phase2_req = wpabuf_alloc_copy(hdr, len);
511 } else if (*resp == NULL)
512 return -1;
513
514 return 0;
515 }
516
517
eap_fast_tlv_nak(int vendor_id,int tlv_type)518 static struct wpabuf * eap_fast_tlv_nak(int vendor_id, int tlv_type)
519 {
520 struct wpabuf *buf;
521 struct eap_tlv_nak_tlv *nak;
522 buf = wpabuf_alloc(sizeof(*nak));
523 if (buf == NULL)
524 return NULL;
525 nak = wpabuf_put(buf, sizeof(*nak));
526 nak->tlv_type = host_to_be16(EAP_TLV_TYPE_MANDATORY | EAP_TLV_NAK_TLV);
527 nak->length = host_to_be16(6);
528 nak->vendor_id = host_to_be32(vendor_id);
529 nak->nak_type = host_to_be16(tlv_type);
530 return buf;
531 }
532
533
eap_fast_tlv_result(int status,int intermediate)534 static struct wpabuf * eap_fast_tlv_result(int status, int intermediate)
535 {
536 struct wpabuf *buf;
537 struct eap_tlv_intermediate_result_tlv *result;
538 buf = wpabuf_alloc(sizeof(*result));
539 if (buf == NULL)
540 return NULL;
541 wpa_printf(MSG_DEBUG, "EAP-FAST: Add %sResult TLV(status=%d)",
542 intermediate ? "Intermediate " : "", status);
543 result = wpabuf_put(buf, sizeof(*result));
544 result->tlv_type = host_to_be16(EAP_TLV_TYPE_MANDATORY |
545 (intermediate ?
546 EAP_TLV_INTERMEDIATE_RESULT_TLV :
547 EAP_TLV_RESULT_TLV));
548 result->length = host_to_be16(2);
549 result->status = host_to_be16(status);
550 return buf;
551 }
552
553
eap_fast_tlv_pac_ack(void)554 static struct wpabuf * eap_fast_tlv_pac_ack(void)
555 {
556 struct wpabuf *buf;
557 struct eap_tlv_result_tlv *res;
558 struct eap_tlv_pac_ack_tlv *ack;
559
560 buf = wpabuf_alloc(sizeof(*res) + sizeof(*ack));
561 if (buf == NULL)
562 return NULL;
563
564 wpa_printf(MSG_DEBUG, "EAP-FAST: Add PAC TLV (ack)");
565 ack = wpabuf_put(buf, sizeof(*ack));
566 ack->tlv_type = host_to_be16(EAP_TLV_PAC_TLV |
567 EAP_TLV_TYPE_MANDATORY);
568 ack->length = host_to_be16(sizeof(*ack) - sizeof(struct eap_tlv_hdr));
569 ack->pac_type = host_to_be16(PAC_TYPE_PAC_ACKNOWLEDGEMENT);
570 ack->pac_len = host_to_be16(2);
571 ack->result = host_to_be16(EAP_TLV_RESULT_SUCCESS);
572
573 return buf;
574 }
575
576
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)577 static struct wpabuf * eap_fast_process_eap_payload_tlv(
578 struct eap_sm *sm, struct eap_fast_data *data,
579 struct eap_method_ret *ret,
580 u8 *eap_payload_tlv, size_t eap_payload_tlv_len)
581 {
582 struct eap_hdr *hdr;
583 struct wpabuf *resp = NULL;
584
585 if (eap_payload_tlv_len < sizeof(*hdr)) {
586 wpa_printf(MSG_DEBUG, "EAP-FAST: too short EAP "
587 "Payload TLV (len=%lu)",
588 (unsigned long) eap_payload_tlv_len);
589 return NULL;
590 }
591
592 hdr = (struct eap_hdr *) eap_payload_tlv;
593 if (be_to_host16(hdr->length) > eap_payload_tlv_len) {
594 wpa_printf(MSG_DEBUG, "EAP-FAST: EAP packet overflow in "
595 "EAP Payload TLV");
596 return NULL;
597 }
598
599 if (hdr->code != EAP_CODE_REQUEST) {
600 wpa_printf(MSG_INFO, "EAP-FAST: Unexpected code=%d in "
601 "Phase 2 EAP header", hdr->code);
602 return NULL;
603 }
604
605 if (eap_fast_phase2_request(sm, data, ret, hdr, &resp)) {
606 wpa_printf(MSG_INFO, "EAP-FAST: Phase2 Request processing "
607 "failed");
608 return NULL;
609 }
610
611 return eap_fast_tlv_eap_payload(resp);
612 }
613
614
eap_fast_validate_crypto_binding(struct eap_tlv_crypto_binding_tlv * _bind)615 static int eap_fast_validate_crypto_binding(
616 struct eap_tlv_crypto_binding_tlv *_bind)
617 {
618 wpa_printf(MSG_DEBUG, "EAP-FAST: Crypto-Binding TLV: Version %d "
619 "Received Version %d SubType %d",
620 _bind->version, _bind->received_version, _bind->subtype);
621 wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: NONCE",
622 _bind->nonce, sizeof(_bind->nonce));
623 wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Compound MAC",
624 _bind->compound_mac, sizeof(_bind->compound_mac));
625
626 if (_bind->version != EAP_FAST_VERSION ||
627 _bind->received_version != EAP_FAST_VERSION ||
628 _bind->subtype != EAP_TLV_CRYPTO_BINDING_SUBTYPE_REQUEST) {
629 wpa_printf(MSG_INFO, "EAP-FAST: Invalid version/subtype in "
630 "Crypto-Binding TLV: Version %d "
631 "Received Version %d SubType %d",
632 _bind->version, _bind->received_version,
633 _bind->subtype);
634 return -1;
635 }
636
637 return 0;
638 }
639
640
eap_fast_write_crypto_binding(struct eap_tlv_crypto_binding_tlv * rbind,struct eap_tlv_crypto_binding_tlv * _bind,const u8 * cmk)641 static void eap_fast_write_crypto_binding(
642 struct eap_tlv_crypto_binding_tlv *rbind,
643 struct eap_tlv_crypto_binding_tlv *_bind, const u8 *cmk)
644 {
645 rbind->tlv_type = host_to_be16(EAP_TLV_TYPE_MANDATORY |
646 EAP_TLV_CRYPTO_BINDING_TLV);
647 rbind->length = host_to_be16(sizeof(*rbind) -
648 sizeof(struct eap_tlv_hdr));
649 rbind->version = EAP_FAST_VERSION;
650 rbind->received_version = _bind->version;
651 rbind->subtype = EAP_TLV_CRYPTO_BINDING_SUBTYPE_RESPONSE;
652 os_memcpy(rbind->nonce, _bind->nonce, sizeof(_bind->nonce));
653 inc_byte_array(rbind->nonce, sizeof(rbind->nonce));
654 hmac_sha1(cmk, EAP_FAST_CMK_LEN, (u8 *) rbind, sizeof(*rbind),
655 rbind->compound_mac);
656
657 wpa_printf(MSG_DEBUG, "EAP-FAST: Reply Crypto-Binding TLV: Version %d "
658 "Received Version %d SubType %d",
659 rbind->version, rbind->received_version, rbind->subtype);
660 wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: NONCE",
661 rbind->nonce, sizeof(rbind->nonce));
662 wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Compound MAC",
663 rbind->compound_mac, sizeof(rbind->compound_mac));
664 }
665
666
eap_fast_get_phase2_key(struct eap_sm * sm,struct eap_fast_data * data,u8 * isk,size_t isk_len)667 static int eap_fast_get_phase2_key(struct eap_sm *sm,
668 struct eap_fast_data *data,
669 u8 *isk, size_t isk_len)
670 {
671 u8 *key;
672 size_t key_len;
673
674 os_memset(isk, 0, isk_len);
675
676 if (data->phase2_method == NULL || data->phase2_priv == NULL) {
677 wpa_printf(MSG_DEBUG, "EAP-FAST: Phase 2 method not "
678 "available");
679 return -1;
680 }
681
682 if (data->phase2_method->isKeyAvailable == NULL ||
683 data->phase2_method->getKey == NULL)
684 return 0;
685
686 if (!data->phase2_method->isKeyAvailable(sm, data->phase2_priv) ||
687 (key = data->phase2_method->getKey(sm, data->phase2_priv,
688 &key_len)) == NULL) {
689 wpa_printf(MSG_DEBUG, "EAP-FAST: Could not get key material "
690 "from Phase 2");
691 return -1;
692 }
693
694 if (key_len > isk_len)
695 key_len = isk_len;
696 if (key_len == 32 &&
697 data->phase2_method->vendor == EAP_VENDOR_IETF &&
698 data->phase2_method->method == EAP_TYPE_MSCHAPV2) {
699 /*
700 * EAP-FAST uses reverse order for MS-MPPE keys when deriving
701 * MSK from EAP-MSCHAPv2. Swap the keys here to get the correct
702 * ISK for EAP-FAST cryptobinding.
703 */
704 os_memcpy(isk, key + 16, 16);
705 os_memcpy(isk + 16, key, 16);
706 } else
707 os_memcpy(isk, key, key_len);
708 os_free(key);
709
710 return 0;
711 }
712
713
eap_fast_get_cmk(struct eap_sm * sm,struct eap_fast_data * data,u8 * cmk)714 static int eap_fast_get_cmk(struct eap_sm *sm, struct eap_fast_data *data,
715 u8 *cmk)
716 {
717 u8 isk[32], imck[60];
718
719 wpa_printf(MSG_DEBUG, "EAP-FAST: Determining CMK[%d] for Compound MIC "
720 "calculation", data->simck_idx + 1);
721
722 /*
723 * RFC 4851, Section 5.2:
724 * IMCK[j] = T-PRF(S-IMCK[j-1], "Inner Methods Compound Keys",
725 * MSK[j], 60)
726 * S-IMCK[j] = first 40 octets of IMCK[j]
727 * CMK[j] = last 20 octets of IMCK[j]
728 */
729
730 if (eap_fast_get_phase2_key(sm, data, isk, sizeof(isk)) < 0)
731 return -1;
732 wpa_hexdump_key(MSG_MSGDUMP, "EAP-FAST: ISK[j]", isk, sizeof(isk));
733 if (sha1_t_prf(data->simck, EAP_FAST_SIMCK_LEN,
734 "Inner Methods Compound Keys",
735 isk, sizeof(isk), imck, sizeof(imck)) < 0)
736 return -1;
737 data->simck_idx++;
738 os_memcpy(data->simck, imck, EAP_FAST_SIMCK_LEN);
739 wpa_hexdump_key(MSG_MSGDUMP, "EAP-FAST: S-IMCK[j]",
740 data->simck, EAP_FAST_SIMCK_LEN);
741 os_memcpy(cmk, imck + EAP_FAST_SIMCK_LEN, EAP_FAST_CMK_LEN);
742 wpa_hexdump_key(MSG_MSGDUMP, "EAP-FAST: CMK[j]",
743 cmk, EAP_FAST_CMK_LEN);
744
745 return 0;
746 }
747
748
eap_fast_write_pac_request(u8 * pos,u16 pac_type)749 static u8 * eap_fast_write_pac_request(u8 *pos, u16 pac_type)
750 {
751 struct eap_tlv_hdr *pac;
752 struct eap_tlv_request_action_tlv *act;
753 struct eap_tlv_pac_type_tlv *type;
754
755 act = (struct eap_tlv_request_action_tlv *) pos;
756 act->tlv_type = host_to_be16(EAP_TLV_REQUEST_ACTION_TLV);
757 act->length = host_to_be16(2);
758 act->action = host_to_be16(EAP_TLV_ACTION_PROCESS_TLV);
759
760 pac = (struct eap_tlv_hdr *) (act + 1);
761 pac->tlv_type = host_to_be16(EAP_TLV_PAC_TLV);
762 pac->length = host_to_be16(sizeof(*type));
763
764 type = (struct eap_tlv_pac_type_tlv *) (pac + 1);
765 type->tlv_type = host_to_be16(PAC_TYPE_PAC_TYPE);
766 type->length = host_to_be16(2);
767 type->pac_type = host_to_be16(pac_type);
768
769 return (u8 *) (type + 1);
770 }
771
772
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)773 static struct wpabuf * eap_fast_process_crypto_binding(
774 struct eap_sm *sm, struct eap_fast_data *data,
775 struct eap_method_ret *ret,
776 struct eap_tlv_crypto_binding_tlv *_bind, size_t bind_len)
777 {
778 struct wpabuf *resp;
779 u8 *pos;
780 u8 cmk[EAP_FAST_CMK_LEN], cmac[SHA1_MAC_LEN];
781 int res;
782 size_t len;
783
784 if (eap_fast_validate_crypto_binding(_bind) < 0)
785 return NULL;
786
787 if (eap_fast_get_cmk(sm, data, cmk) < 0)
788 return NULL;
789
790 /* Validate received Compound MAC */
791 os_memcpy(cmac, _bind->compound_mac, sizeof(cmac));
792 os_memset(_bind->compound_mac, 0, sizeof(cmac));
793 wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Crypto-Binding TLV for Compound "
794 "MAC calculation", (u8 *) _bind, bind_len);
795 hmac_sha1(cmk, EAP_FAST_CMK_LEN, (u8 *) _bind, bind_len,
796 _bind->compound_mac);
797 res = os_memcmp_const(cmac, _bind->compound_mac, sizeof(cmac));
798 wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Received Compound MAC",
799 cmac, sizeof(cmac));
800 wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Calculated Compound MAC",
801 _bind->compound_mac, sizeof(cmac));
802 if (res != 0) {
803 wpa_printf(MSG_INFO, "EAP-FAST: Compound MAC did not match");
804 os_memcpy(_bind->compound_mac, cmac, sizeof(cmac));
805 return NULL;
806 }
807
808 /*
809 * Compound MAC was valid, so authentication succeeded. Reply with
810 * crypto binding to allow server to complete authentication.
811 */
812
813 len = sizeof(struct eap_tlv_crypto_binding_tlv);
814 resp = wpabuf_alloc(len);
815 if (resp == NULL)
816 return NULL;
817
818 if (!data->anon_provisioning && data->phase2_success &&
819 eap_fast_derive_msk(data) < 0) {
820 wpa_printf(MSG_INFO, "EAP-FAST: Failed to generate MSK");
821 ret->methodState = METHOD_DONE;
822 ret->decision = DECISION_FAIL;
823 data->phase2_success = 0;
824 wpabuf_clear_free(resp);
825 return NULL;
826 }
827
828 if (!data->anon_provisioning && data->phase2_success) {
829 os_free(data->session_id);
830 data->session_id = eap_peer_tls_derive_session_id(
831 sm, &data->ssl, EAP_TYPE_FAST, &data->id_len);
832 if (data->session_id) {
833 wpa_hexdump(MSG_DEBUG, "EAP-FAST: Derived Session-Id",
834 data->session_id, data->id_len);
835 } else {
836 wpa_printf(MSG_ERROR, "EAP-FAST: Failed to derive "
837 "Session-Id");
838 wpabuf_clear_free(resp);
839 return NULL;
840 }
841 }
842
843 pos = wpabuf_put(resp, sizeof(struct eap_tlv_crypto_binding_tlv));
844 eap_fast_write_crypto_binding((struct eap_tlv_crypto_binding_tlv *)
845 pos, _bind, cmk);
846
847 return resp;
848 }
849
850
eap_fast_parse_pac_tlv(struct eap_fast_pac * entry,int type,u8 * pos,size_t len,int * pac_key_found)851 static void eap_fast_parse_pac_tlv(struct eap_fast_pac *entry, int type,
852 u8 *pos, size_t len, int *pac_key_found)
853 {
854 switch (type & 0x7fff) {
855 case PAC_TYPE_PAC_KEY:
856 wpa_hexdump_key(MSG_DEBUG, "EAP-FAST: PAC-Key", pos, len);
857 if (len != EAP_FAST_PAC_KEY_LEN) {
858 wpa_printf(MSG_DEBUG, "EAP-FAST: Invalid PAC-Key "
859 "length %lu", (unsigned long) len);
860 break;
861 }
862 *pac_key_found = 1;
863 os_memcpy(entry->pac_key, pos, len);
864 break;
865 case PAC_TYPE_PAC_OPAQUE:
866 wpa_hexdump(MSG_DEBUG, "EAP-FAST: PAC-Opaque", pos, len);
867 entry->pac_opaque = pos;
868 entry->pac_opaque_len = len;
869 break;
870 case PAC_TYPE_PAC_INFO:
871 wpa_hexdump(MSG_DEBUG, "EAP-FAST: PAC-Info", pos, len);
872 entry->pac_info = pos;
873 entry->pac_info_len = len;
874 break;
875 default:
876 wpa_printf(MSG_DEBUG, "EAP-FAST: Ignored unknown PAC type %d",
877 type);
878 break;
879 }
880 }
881
882
eap_fast_process_pac_tlv(struct eap_fast_pac * entry,u8 * pac,size_t pac_len)883 static int eap_fast_process_pac_tlv(struct eap_fast_pac *entry,
884 u8 *pac, size_t pac_len)
885 {
886 struct pac_tlv_hdr *hdr;
887 u8 *pos;
888 size_t left, len;
889 int type, pac_key_found = 0;
890
891 pos = pac;
892 left = pac_len;
893
894 while (left > sizeof(*hdr)) {
895 hdr = (struct pac_tlv_hdr *) pos;
896 type = be_to_host16(hdr->type);
897 len = be_to_host16(hdr->len);
898 pos += sizeof(*hdr);
899 left -= sizeof(*hdr);
900 if (len > left) {
901 wpa_printf(MSG_DEBUG, "EAP-FAST: PAC TLV overrun "
902 "(type=%d len=%lu left=%lu)",
903 type, (unsigned long) len,
904 (unsigned long) left);
905 return -1;
906 }
907
908 eap_fast_parse_pac_tlv(entry, type, pos, len, &pac_key_found);
909
910 pos += len;
911 left -= len;
912 }
913
914 if (!pac_key_found || !entry->pac_opaque || !entry->pac_info) {
915 wpa_printf(MSG_DEBUG, "EAP-FAST: PAC TLV does not include "
916 "all the required fields");
917 return -1;
918 }
919
920 return 0;
921 }
922
923
eap_fast_parse_pac_info(struct eap_fast_pac * entry,int type,u8 * pos,size_t len)924 static int eap_fast_parse_pac_info(struct eap_fast_pac *entry, int type,
925 u8 *pos, size_t len)
926 {
927 u16 pac_type;
928 u32 lifetime;
929 struct os_time now;
930
931 switch (type & 0x7fff) {
932 case PAC_TYPE_CRED_LIFETIME:
933 if (len != 4) {
934 wpa_hexdump(MSG_DEBUG, "EAP-FAST: PAC-Info - "
935 "Invalid CRED_LIFETIME length - ignored",
936 pos, len);
937 return 0;
938 }
939
940 /*
941 * This is not currently saved separately in PAC files since
942 * the server can automatically initiate PAC update when
943 * needed. Anyway, the information is available from PAC-Info
944 * dump if it is needed for something in the future.
945 */
946 lifetime = WPA_GET_BE32(pos);
947 os_get_time(&now);
948 wpa_printf(MSG_DEBUG, "EAP-FAST: PAC-Info - CRED_LIFETIME %d "
949 "(%d days)",
950 lifetime, (lifetime - (u32) now.sec) / 86400);
951 break;
952 case PAC_TYPE_A_ID:
953 wpa_hexdump_ascii(MSG_DEBUG, "EAP-FAST: PAC-Info - A-ID",
954 pos, len);
955 entry->a_id = pos;
956 entry->a_id_len = len;
957 break;
958 case PAC_TYPE_I_ID:
959 wpa_hexdump_ascii(MSG_DEBUG, "EAP-FAST: PAC-Info - I-ID",
960 pos, len);
961 entry->i_id = pos;
962 entry->i_id_len = len;
963 break;
964 case PAC_TYPE_A_ID_INFO:
965 wpa_hexdump_ascii(MSG_DEBUG, "EAP-FAST: PAC-Info - A-ID-Info",
966 pos, len);
967 entry->a_id_info = pos;
968 entry->a_id_info_len = len;
969 break;
970 case PAC_TYPE_PAC_TYPE:
971 /* RFC 5422, Section 4.2.6 - PAC-Type TLV */
972 if (len != 2) {
973 wpa_printf(MSG_INFO, "EAP-FAST: Invalid PAC-Type "
974 "length %lu (expected 2)",
975 (unsigned long) len);
976 wpa_hexdump_ascii(MSG_DEBUG,
977 "EAP-FAST: PAC-Info - PAC-Type",
978 pos, len);
979 return -1;
980 }
981 pac_type = WPA_GET_BE16(pos);
982 if (pac_type != PAC_TYPE_TUNNEL_PAC &&
983 pac_type != PAC_TYPE_USER_AUTHORIZATION &&
984 pac_type != PAC_TYPE_MACHINE_AUTHENTICATION) {
985 wpa_printf(MSG_INFO, "EAP-FAST: Unsupported PAC Type "
986 "%d", pac_type);
987 return -1;
988 }
989
990 wpa_printf(MSG_DEBUG, "EAP-FAST: PAC-Info - PAC-Type %d",
991 pac_type);
992 entry->pac_type = pac_type;
993 break;
994 default:
995 wpa_printf(MSG_DEBUG, "EAP-FAST: Ignored unknown PAC-Info "
996 "type %d", type);
997 break;
998 }
999
1000 return 0;
1001 }
1002
1003
eap_fast_process_pac_info(struct eap_fast_pac * entry)1004 static int eap_fast_process_pac_info(struct eap_fast_pac *entry)
1005 {
1006 struct pac_tlv_hdr *hdr;
1007 u8 *pos;
1008 size_t left, len;
1009 int type;
1010
1011 /* RFC 5422, Section 4.2.4 */
1012
1013 /* PAC-Type defaults to Tunnel PAC (Type 1) */
1014 entry->pac_type = PAC_TYPE_TUNNEL_PAC;
1015
1016 pos = entry->pac_info;
1017 left = entry->pac_info_len;
1018 while (left > sizeof(*hdr)) {
1019 hdr = (struct pac_tlv_hdr *) pos;
1020 type = be_to_host16(hdr->type);
1021 len = be_to_host16(hdr->len);
1022 pos += sizeof(*hdr);
1023 left -= sizeof(*hdr);
1024 if (len > left) {
1025 wpa_printf(MSG_DEBUG, "EAP-FAST: PAC-Info overrun "
1026 "(type=%d len=%lu left=%lu)",
1027 type, (unsigned long) len,
1028 (unsigned long) left);
1029 return -1;
1030 }
1031
1032 if (eap_fast_parse_pac_info(entry, type, pos, len) < 0)
1033 return -1;
1034
1035 pos += len;
1036 left -= len;
1037 }
1038
1039 if (entry->a_id == NULL || entry->a_id_info == NULL) {
1040 wpa_printf(MSG_DEBUG, "EAP-FAST: PAC-Info does not include "
1041 "all the required fields");
1042 return -1;
1043 }
1044
1045 return 0;
1046 }
1047
1048
eap_fast_process_pac(struct eap_sm * sm,struct eap_fast_data * data,struct eap_method_ret * ret,u8 * pac,size_t pac_len)1049 static struct wpabuf * eap_fast_process_pac(struct eap_sm *sm,
1050 struct eap_fast_data *data,
1051 struct eap_method_ret *ret,
1052 u8 *pac, size_t pac_len)
1053 {
1054 struct eap_peer_config *config = eap_get_config(sm);
1055 struct eap_fast_pac entry;
1056
1057 os_memset(&entry, 0, sizeof(entry));
1058 if (eap_fast_process_pac_tlv(&entry, pac, pac_len) ||
1059 eap_fast_process_pac_info(&entry))
1060 return NULL;
1061
1062 eap_fast_add_pac(&data->pac, &data->current_pac, &entry);
1063 eap_fast_pac_list_truncate(data->pac, data->max_pac_list_len);
1064 if (data->use_pac_binary_format)
1065 eap_fast_save_pac_bin(sm, data->pac, config->pac_file);
1066 else
1067 eap_fast_save_pac(sm, data->pac, config->pac_file);
1068
1069 if (data->provisioning) {
1070 if (data->anon_provisioning) {
1071 /*
1072 * Unauthenticated provisioning does not provide keying
1073 * material and must end with an EAP-Failure.
1074 * Authentication will be done separately after this.
1075 */
1076 data->success = 0;
1077 ret->decision = DECISION_FAIL;
1078 } else {
1079 /*
1080 * Server may or may not allow authenticated
1081 * provisioning also for key generation.
1082 */
1083 ret->decision = DECISION_COND_SUCC;
1084 }
1085 wpa_printf(MSG_DEBUG, "EAP-FAST: Send PAC-Acknowledgement TLV "
1086 "- Provisioning completed successfully");
1087 sm->expected_failure = 1;
1088 } else {
1089 /*
1090 * This is PAC refreshing, i.e., normal authentication that is
1091 * expected to be completed with an EAP-Success. However,
1092 * RFC 5422, Section 3.5 allows EAP-Failure to be sent even
1093 * after protected success exchange in case of EAP-Fast
1094 * provisioning, so we better use DECISION_COND_SUCC here
1095 * instead of DECISION_UNCOND_SUCC.
1096 */
1097 wpa_printf(MSG_DEBUG, "EAP-FAST: Send PAC-Acknowledgement TLV "
1098 "- PAC refreshing completed successfully");
1099 ret->decision = DECISION_COND_SUCC;
1100 }
1101 ret->methodState = METHOD_DONE;
1102 return eap_fast_tlv_pac_ack();
1103 }
1104
1105
eap_fast_parse_decrypted(struct wpabuf * decrypted,struct eap_fast_tlv_parse * tlv,struct wpabuf ** resp)1106 static int eap_fast_parse_decrypted(struct wpabuf *decrypted,
1107 struct eap_fast_tlv_parse *tlv,
1108 struct wpabuf **resp)
1109 {
1110 int mandatory, tlv_type, res;
1111 size_t len;
1112 u8 *pos, *end;
1113
1114 os_memset(tlv, 0, sizeof(*tlv));
1115
1116 /* Parse TLVs from the decrypted Phase 2 data */
1117 pos = wpabuf_mhead(decrypted);
1118 end = pos + wpabuf_len(decrypted);
1119 while (end - pos > 4) {
1120 mandatory = pos[0] & 0x80;
1121 tlv_type = WPA_GET_BE16(pos) & 0x3fff;
1122 pos += 2;
1123 len = WPA_GET_BE16(pos);
1124 pos += 2;
1125 if (len > (size_t) (end - pos)) {
1126 wpa_printf(MSG_INFO, "EAP-FAST: TLV overflow");
1127 return -1;
1128 }
1129 wpa_printf(MSG_DEBUG, "EAP-FAST: Received Phase 2: "
1130 "TLV type %d length %u%s",
1131 tlv_type, (unsigned int) len,
1132 mandatory ? " (mandatory)" : "");
1133
1134 res = eap_fast_parse_tlv(tlv, tlv_type, pos, len);
1135 if (res == -2)
1136 break;
1137 if (res < 0) {
1138 if (mandatory) {
1139 wpa_printf(MSG_DEBUG, "EAP-FAST: Nak unknown "
1140 "mandatory TLV type %d", tlv_type);
1141 *resp = eap_fast_tlv_nak(0, tlv_type);
1142 break;
1143 } else {
1144 wpa_printf(MSG_DEBUG, "EAP-FAST: ignored "
1145 "unknown optional TLV type %d",
1146 tlv_type);
1147 }
1148 }
1149
1150 pos += len;
1151 }
1152
1153 return 0;
1154 }
1155
1156
eap_fast_encrypt_response(struct eap_sm * sm,struct eap_fast_data * data,struct wpabuf * resp,u8 identifier,struct wpabuf ** out_data)1157 static int eap_fast_encrypt_response(struct eap_sm *sm,
1158 struct eap_fast_data *data,
1159 struct wpabuf *resp,
1160 u8 identifier, struct wpabuf **out_data)
1161 {
1162 if (resp == NULL)
1163 return 0;
1164
1165 wpa_hexdump_buf(MSG_DEBUG, "EAP-FAST: Encrypting Phase 2 data",
1166 resp);
1167 if (eap_peer_tls_encrypt(sm, &data->ssl, EAP_TYPE_FAST,
1168 data->fast_version, identifier,
1169 resp, out_data)) {
1170 wpa_printf(MSG_INFO, "EAP-FAST: Failed to encrypt a Phase 2 "
1171 "frame");
1172 }
1173 wpabuf_clear_free(resp);
1174
1175 return 0;
1176 }
1177
1178
eap_fast_pac_request(void)1179 static struct wpabuf * eap_fast_pac_request(void)
1180 {
1181 struct wpabuf *tmp;
1182 u8 *pos, *pos2;
1183
1184 tmp = wpabuf_alloc(sizeof(struct eap_tlv_hdr) +
1185 sizeof(struct eap_tlv_request_action_tlv) +
1186 sizeof(struct eap_tlv_pac_type_tlv));
1187 if (tmp == NULL)
1188 return NULL;
1189
1190 pos = wpabuf_put(tmp, 0);
1191 pos2 = eap_fast_write_pac_request(pos, PAC_TYPE_TUNNEL_PAC);
1192 wpabuf_put(tmp, pos2 - pos);
1193 return tmp;
1194 }
1195
1196
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)1197 static int eap_fast_process_decrypted(struct eap_sm *sm,
1198 struct eap_fast_data *data,
1199 struct eap_method_ret *ret,
1200 u8 identifier,
1201 struct wpabuf *decrypted,
1202 struct wpabuf **out_data)
1203 {
1204 struct wpabuf *resp = NULL, *tmp;
1205 struct eap_fast_tlv_parse tlv;
1206 int failed = 0;
1207
1208 if (eap_fast_parse_decrypted(decrypted, &tlv, &resp) < 0)
1209 return 0;
1210 if (resp)
1211 return eap_fast_encrypt_response(sm, data, resp,
1212 identifier, out_data);
1213
1214 if (tlv.result == EAP_TLV_RESULT_FAILURE) {
1215 resp = eap_fast_tlv_result(EAP_TLV_RESULT_FAILURE, 0);
1216 return eap_fast_encrypt_response(sm, data, resp,
1217 identifier, out_data);
1218 }
1219
1220 if (tlv.iresult == EAP_TLV_RESULT_FAILURE) {
1221 resp = eap_fast_tlv_result(EAP_TLV_RESULT_FAILURE, 1);
1222 return eap_fast_encrypt_response(sm, data, resp,
1223 identifier, out_data);
1224 }
1225
1226 if (tlv.crypto_binding) {
1227 tmp = eap_fast_process_crypto_binding(sm, data, ret,
1228 tlv.crypto_binding,
1229 tlv.crypto_binding_len);
1230 if (tmp == NULL)
1231 failed = 1;
1232 else
1233 resp = wpabuf_concat(resp, tmp);
1234 }
1235
1236 if (tlv.iresult == EAP_TLV_RESULT_SUCCESS) {
1237 tmp = eap_fast_tlv_result(failed ? EAP_TLV_RESULT_FAILURE :
1238 EAP_TLV_RESULT_SUCCESS, 1);
1239 resp = wpabuf_concat(resp, tmp);
1240 }
1241
1242 if (tlv.eap_payload_tlv) {
1243 tmp = eap_fast_process_eap_payload_tlv(
1244 sm, data, ret, tlv.eap_payload_tlv,
1245 tlv.eap_payload_tlv_len);
1246 resp = wpabuf_concat(resp, tmp);
1247 }
1248
1249 if (tlv.pac && tlv.result != EAP_TLV_RESULT_SUCCESS) {
1250 wpa_printf(MSG_DEBUG, "EAP-FAST: PAC TLV without Result TLV "
1251 "acknowledging success");
1252 failed = 1;
1253 } else if (tlv.pac && tlv.result == EAP_TLV_RESULT_SUCCESS) {
1254 tmp = eap_fast_process_pac(sm, data, ret, tlv.pac,
1255 tlv.pac_len);
1256 resp = wpabuf_concat(resp, tmp);
1257 }
1258
1259 if (data->current_pac == NULL && data->provisioning &&
1260 !data->anon_provisioning && !tlv.pac &&
1261 (tlv.iresult == EAP_TLV_RESULT_SUCCESS ||
1262 tlv.result == EAP_TLV_RESULT_SUCCESS)) {
1263 /*
1264 * Need to request Tunnel PAC when using authenticated
1265 * provisioning.
1266 */
1267 wpa_printf(MSG_DEBUG, "EAP-FAST: Request Tunnel PAC");
1268 tmp = eap_fast_pac_request();
1269 resp = wpabuf_concat(resp, tmp);
1270 }
1271
1272 if (tlv.result == EAP_TLV_RESULT_SUCCESS && !failed) {
1273 tmp = eap_fast_tlv_result(EAP_TLV_RESULT_SUCCESS, 0);
1274 resp = wpabuf_concat(tmp, resp);
1275 } else if (failed) {
1276 tmp = eap_fast_tlv_result(EAP_TLV_RESULT_FAILURE, 0);
1277 resp = wpabuf_concat(tmp, resp);
1278 }
1279
1280 if (resp && tlv.result == EAP_TLV_RESULT_SUCCESS && !failed &&
1281 tlv.crypto_binding && data->phase2_success) {
1282 if (data->anon_provisioning) {
1283 wpa_printf(MSG_DEBUG, "EAP-FAST: Unauthenticated "
1284 "provisioning completed successfully.");
1285 ret->methodState = METHOD_DONE;
1286 ret->decision = DECISION_FAIL;
1287 sm->expected_failure = 1;
1288 } else {
1289 wpa_printf(MSG_DEBUG, "EAP-FAST: Authentication "
1290 "completed successfully.");
1291 if (data->provisioning)
1292 ret->methodState = METHOD_MAY_CONT;
1293 else
1294 ret->methodState = METHOD_DONE;
1295 ret->decision = DECISION_UNCOND_SUCC;
1296 }
1297 }
1298
1299 if (resp == NULL) {
1300 wpa_printf(MSG_DEBUG, "EAP-FAST: No recognized TLVs - send "
1301 "empty response packet");
1302 resp = wpabuf_alloc(1);
1303 }
1304
1305 return eap_fast_encrypt_response(sm, data, resp, identifier,
1306 out_data);
1307 }
1308
1309
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)1310 static int eap_fast_decrypt(struct eap_sm *sm, struct eap_fast_data *data,
1311 struct eap_method_ret *ret, u8 identifier,
1312 const struct wpabuf *in_data,
1313 struct wpabuf **out_data)
1314 {
1315 struct wpabuf *in_decrypted;
1316 int res;
1317
1318 wpa_printf(MSG_DEBUG, "EAP-FAST: Received %lu bytes encrypted data for"
1319 " Phase 2", (unsigned long) wpabuf_len(in_data));
1320
1321 if (data->pending_phase2_req) {
1322 wpa_printf(MSG_DEBUG, "EAP-FAST: Pending Phase 2 request - "
1323 "skip decryption and use old data");
1324 /* Clear TLS reassembly state. */
1325 eap_peer_tls_reset_input(&data->ssl);
1326
1327 in_decrypted = data->pending_phase2_req;
1328 data->pending_phase2_req = NULL;
1329 goto continue_req;
1330 }
1331
1332 if (wpabuf_len(in_data) == 0) {
1333 /* Received TLS ACK - requesting more fragments */
1334 return eap_peer_tls_encrypt(sm, &data->ssl, EAP_TYPE_FAST,
1335 data->fast_version,
1336 identifier, NULL, out_data);
1337 }
1338
1339 res = eap_peer_tls_decrypt(sm, &data->ssl, in_data, &in_decrypted);
1340 if (res)
1341 return res;
1342
1343 continue_req:
1344 wpa_hexdump_buf(MSG_MSGDUMP, "EAP-FAST: Decrypted Phase 2 TLV(s)",
1345 in_decrypted);
1346
1347 if (wpabuf_len(in_decrypted) < 4) {
1348 wpa_printf(MSG_INFO, "EAP-FAST: Too short Phase 2 "
1349 "TLV frame (len=%lu)",
1350 (unsigned long) wpabuf_len(in_decrypted));
1351 wpabuf_clear_free(in_decrypted);
1352 return -1;
1353 }
1354
1355 res = eap_fast_process_decrypted(sm, data, ret, identifier,
1356 in_decrypted, out_data);
1357
1358 wpabuf_clear_free(in_decrypted);
1359
1360 return res;
1361 }
1362
1363
eap_fast_get_a_id(const u8 * buf,size_t len,size_t * id_len)1364 static const u8 * eap_fast_get_a_id(const u8 *buf, size_t len, size_t *id_len)
1365 {
1366 const u8 *a_id;
1367 const struct pac_tlv_hdr *hdr;
1368
1369 /*
1370 * Parse authority identity (A-ID) from the EAP-FAST/Start. This
1371 * supports both raw A-ID and one inside an A-ID TLV.
1372 */
1373 a_id = buf;
1374 *id_len = len;
1375 if (len > sizeof(*hdr)) {
1376 int tlen;
1377 hdr = (const struct pac_tlv_hdr *) buf;
1378 tlen = be_to_host16(hdr->len);
1379 if (be_to_host16(hdr->type) == PAC_TYPE_A_ID &&
1380 sizeof(*hdr) + tlen <= len) {
1381 wpa_printf(MSG_DEBUG, "EAP-FAST: A-ID was in TLV "
1382 "(Start)");
1383 a_id = (const u8 *) (hdr + 1);
1384 *id_len = tlen;
1385 }
1386 }
1387 wpa_hexdump_ascii(MSG_DEBUG, "EAP-FAST: A-ID", a_id, *id_len);
1388
1389 return a_id;
1390 }
1391
1392
eap_fast_select_pac(struct eap_fast_data * data,const u8 * a_id,size_t a_id_len)1393 static void eap_fast_select_pac(struct eap_fast_data *data,
1394 const u8 *a_id, size_t a_id_len)
1395 {
1396 data->current_pac = eap_fast_get_pac(data->pac, a_id, a_id_len,
1397 PAC_TYPE_TUNNEL_PAC);
1398 if (data->current_pac == NULL) {
1399 /*
1400 * Tunnel PAC was not available for this A-ID. Try to use
1401 * Machine Authentication PAC, if one is available.
1402 */
1403 data->current_pac = eap_fast_get_pac(
1404 data->pac, a_id, a_id_len,
1405 PAC_TYPE_MACHINE_AUTHENTICATION);
1406 }
1407
1408 if (data->current_pac) {
1409 wpa_printf(MSG_DEBUG, "EAP-FAST: PAC found for this A-ID "
1410 "(PAC-Type %d)", data->current_pac->pac_type);
1411 wpa_hexdump_ascii(MSG_MSGDUMP, "EAP-FAST: A-ID-Info",
1412 data->current_pac->a_id_info,
1413 data->current_pac->a_id_info_len);
1414 }
1415 }
1416
1417
eap_fast_use_pac_opaque(struct eap_sm * sm,struct eap_fast_data * data,struct eap_fast_pac * pac)1418 static int eap_fast_use_pac_opaque(struct eap_sm *sm,
1419 struct eap_fast_data *data,
1420 struct eap_fast_pac *pac)
1421 {
1422 u8 *tlv;
1423 size_t tlv_len, olen;
1424 struct eap_tlv_hdr *ehdr;
1425
1426 olen = pac->pac_opaque_len;
1427 tlv_len = sizeof(*ehdr) + olen;
1428 tlv = os_malloc(tlv_len);
1429 if (tlv) {
1430 ehdr = (struct eap_tlv_hdr *) tlv;
1431 ehdr->tlv_type = host_to_be16(PAC_TYPE_PAC_OPAQUE);
1432 ehdr->length = host_to_be16(olen);
1433 os_memcpy(ehdr + 1, pac->pac_opaque, olen);
1434 }
1435 if (tlv == NULL ||
1436 tls_connection_client_hello_ext(sm->ssl_ctx, data->ssl.conn,
1437 TLS_EXT_PAC_OPAQUE,
1438 tlv, tlv_len) < 0) {
1439 wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to add PAC-Opaque TLS "
1440 "extension");
1441 os_free(tlv);
1442 return -1;
1443 }
1444 os_free(tlv);
1445
1446 return 0;
1447 }
1448
1449
eap_fast_clear_pac_opaque_ext(struct eap_sm * sm,struct eap_fast_data * data)1450 static int eap_fast_clear_pac_opaque_ext(struct eap_sm *sm,
1451 struct eap_fast_data *data)
1452 {
1453 if (tls_connection_client_hello_ext(sm->ssl_ctx, data->ssl.conn,
1454 TLS_EXT_PAC_OPAQUE, NULL, 0) < 0) {
1455 wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to remove PAC-Opaque "
1456 "TLS extension");
1457 return -1;
1458 }
1459 return 0;
1460 }
1461
1462
eap_fast_set_provisioning_ciphers(struct eap_sm * sm,struct eap_fast_data * data)1463 static int eap_fast_set_provisioning_ciphers(struct eap_sm *sm,
1464 struct eap_fast_data *data)
1465 {
1466 u8 ciphers[7];
1467 int count = 0;
1468
1469 if (data->provisioning_allowed & EAP_FAST_PROV_UNAUTH) {
1470 wpa_printf(MSG_DEBUG, "EAP-FAST: Enabling unauthenticated "
1471 "provisioning TLS cipher suites");
1472 ciphers[count++] = TLS_CIPHER_ANON_DH_AES128_SHA;
1473 }
1474
1475 if (data->provisioning_allowed & EAP_FAST_PROV_AUTH) {
1476 wpa_printf(MSG_DEBUG, "EAP-FAST: Enabling authenticated "
1477 "provisioning TLS cipher suites");
1478 ciphers[count++] = TLS_CIPHER_RSA_DHE_AES256_SHA;
1479 ciphers[count++] = TLS_CIPHER_RSA_DHE_AES128_SHA;
1480 ciphers[count++] = TLS_CIPHER_AES256_SHA;
1481 ciphers[count++] = TLS_CIPHER_AES128_SHA;
1482 ciphers[count++] = TLS_CIPHER_RC4_SHA;
1483 }
1484
1485 ciphers[count++] = TLS_CIPHER_NONE;
1486
1487 if (tls_connection_set_cipher_list(sm->ssl_ctx, data->ssl.conn,
1488 ciphers)) {
1489 wpa_printf(MSG_INFO, "EAP-FAST: Could not configure TLS "
1490 "cipher suites for provisioning");
1491 return -1;
1492 }
1493
1494 return 0;
1495 }
1496
1497
eap_fast_process_start(struct eap_sm * sm,struct eap_fast_data * data,u8 flags,const u8 * pos,size_t left)1498 static int eap_fast_process_start(struct eap_sm *sm,
1499 struct eap_fast_data *data, u8 flags,
1500 const u8 *pos, size_t left)
1501 {
1502 const u8 *a_id;
1503 size_t a_id_len;
1504
1505 /* EAP-FAST Version negotiation (section 3.1) */
1506 wpa_printf(MSG_DEBUG, "EAP-FAST: Start (server ver=%d, own ver=%d)",
1507 flags & EAP_TLS_VERSION_MASK, data->fast_version);
1508 if ((flags & EAP_TLS_VERSION_MASK) < data->fast_version)
1509 data->fast_version = flags & EAP_TLS_VERSION_MASK;
1510 wpa_printf(MSG_DEBUG, "EAP-FAST: Using FAST version %d",
1511 data->fast_version);
1512
1513 a_id = eap_fast_get_a_id(pos, left, &a_id_len);
1514 eap_fast_select_pac(data, a_id, a_id_len);
1515
1516 if (data->resuming && data->current_pac) {
1517 wpa_printf(MSG_DEBUG, "EAP-FAST: Trying to resume session - "
1518 "do not add PAC-Opaque to TLS ClientHello");
1519 if (eap_fast_clear_pac_opaque_ext(sm, data) < 0)
1520 return -1;
1521 } else if (data->current_pac) {
1522 /*
1523 * PAC found for the A-ID and we are not resuming an old
1524 * session, so add PAC-Opaque extension to ClientHello.
1525 */
1526 if (eap_fast_use_pac_opaque(sm, data, data->current_pac) < 0)
1527 return -1;
1528 } else {
1529 /* No PAC found, so we must provision one. */
1530 if (!data->provisioning_allowed) {
1531 wpa_printf(MSG_DEBUG, "EAP-FAST: No PAC found and "
1532 "provisioning disabled");
1533 return -1;
1534 }
1535 wpa_printf(MSG_DEBUG, "EAP-FAST: No PAC found - "
1536 "starting provisioning");
1537 if (eap_fast_set_provisioning_ciphers(sm, data) < 0 ||
1538 eap_fast_clear_pac_opaque_ext(sm, data) < 0)
1539 return -1;
1540 data->provisioning = 1;
1541 }
1542
1543 return 0;
1544 }
1545
1546
eap_fast_process(struct eap_sm * sm,void * priv,struct eap_method_ret * ret,const struct wpabuf * reqData)1547 static struct wpabuf * eap_fast_process(struct eap_sm *sm, void *priv,
1548 struct eap_method_ret *ret,
1549 const struct wpabuf *reqData)
1550 {
1551 const struct eap_hdr *req;
1552 size_t left;
1553 int res;
1554 u8 flags, id;
1555 struct wpabuf *resp;
1556 const u8 *pos;
1557 struct eap_fast_data *data = priv;
1558 struct wpabuf msg;
1559
1560 pos = eap_peer_tls_process_init(sm, &data->ssl, EAP_TYPE_FAST, ret,
1561 reqData, &left, &flags);
1562 if (pos == NULL)
1563 return NULL;
1564
1565 req = wpabuf_head(reqData);
1566 id = req->identifier;
1567
1568 if (flags & EAP_TLS_FLAGS_START) {
1569 if (eap_fast_process_start(sm, data, flags, pos, left) < 0)
1570 return NULL;
1571
1572 left = 0; /* A-ID is not used in further packet processing */
1573 }
1574
1575 wpabuf_set(&msg, pos, left);
1576
1577 resp = NULL;
1578 if (tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
1579 !data->resuming) {
1580 /* Process tunneled (encrypted) phase 2 data. */
1581 res = eap_fast_decrypt(sm, data, ret, id, &msg, &resp);
1582 if (res < 0) {
1583 ret->methodState = METHOD_DONE;
1584 ret->decision = DECISION_FAIL;
1585 /*
1586 * Ack possible Alert that may have caused failure in
1587 * decryption.
1588 */
1589 res = 1;
1590 }
1591 } else {
1592 if (sm->waiting_ext_cert_check && data->pending_resp) {
1593 struct eap_peer_config *config = eap_get_config(sm);
1594
1595 if (config->pending_ext_cert_check ==
1596 EXT_CERT_CHECK_GOOD) {
1597 wpa_printf(MSG_DEBUG,
1598 "EAP-FAST: External certificate check succeeded - continue handshake");
1599 resp = data->pending_resp;
1600 data->pending_resp = NULL;
1601 sm->waiting_ext_cert_check = 0;
1602 return resp;
1603 }
1604
1605 if (config->pending_ext_cert_check ==
1606 EXT_CERT_CHECK_BAD) {
1607 wpa_printf(MSG_DEBUG,
1608 "EAP-FAST: External certificate check failed - force authentication failure");
1609 ret->methodState = METHOD_DONE;
1610 ret->decision = DECISION_FAIL;
1611 sm->waiting_ext_cert_check = 0;
1612 return NULL;
1613 }
1614
1615 wpa_printf(MSG_DEBUG,
1616 "EAP-FAST: Continuing to wait external server certificate validation");
1617 return NULL;
1618 }
1619
1620 /* Continue processing TLS handshake (phase 1). */
1621 res = eap_peer_tls_process_helper(sm, &data->ssl,
1622 EAP_TYPE_FAST,
1623 data->fast_version, id, &msg,
1624 &resp);
1625 if (res < 0) {
1626 wpa_printf(MSG_DEBUG,
1627 "EAP-FAST: TLS processing failed");
1628 ret->methodState = METHOD_DONE;
1629 ret->decision = DECISION_FAIL;
1630 return resp;
1631 }
1632
1633 if (sm->waiting_ext_cert_check) {
1634 wpa_printf(MSG_DEBUG,
1635 "EAP-FAST: Waiting external server certificate validation");
1636 wpabuf_clear_free(data->pending_resp);
1637 data->pending_resp = resp;
1638 return NULL;
1639 }
1640
1641 if (tls_connection_established(sm->ssl_ctx, data->ssl.conn)) {
1642 char cipher[80];
1643 wpa_printf(MSG_DEBUG,
1644 "EAP-FAST: TLS done, proceed to Phase 2");
1645 if (data->provisioning &&
1646 (!(data->provisioning_allowed &
1647 EAP_FAST_PROV_AUTH) ||
1648 tls_get_cipher(sm->ssl_ctx, data->ssl.conn,
1649 cipher, sizeof(cipher)) < 0 ||
1650 os_strstr(cipher, "ADH-") ||
1651 os_strstr(cipher, "anon"))) {
1652 wpa_printf(MSG_DEBUG, "EAP-FAST: Using "
1653 "anonymous (unauthenticated) "
1654 "provisioning");
1655 data->anon_provisioning = 1;
1656 } else
1657 data->anon_provisioning = 0;
1658 data->resuming = 0;
1659 if (eap_fast_derive_keys(sm, data) < 0) {
1660 wpa_printf(MSG_DEBUG,
1661 "EAP-FAST: Could not derive keys");
1662 ret->methodState = METHOD_DONE;
1663 ret->decision = DECISION_FAIL;
1664 wpabuf_clear_free(resp);
1665 return NULL;
1666 }
1667 }
1668
1669 if (res == 2) {
1670 /*
1671 * Application data included in the handshake message.
1672 */
1673 wpabuf_clear_free(data->pending_phase2_req);
1674 data->pending_phase2_req = resp;
1675 resp = NULL;
1676 res = eap_fast_decrypt(sm, data, ret, id, &msg, &resp);
1677 }
1678 }
1679
1680 if (res == 1) {
1681 wpabuf_clear_free(resp);
1682 return eap_peer_tls_build_ack(id, EAP_TYPE_FAST,
1683 data->fast_version);
1684 }
1685
1686 return resp;
1687 }
1688
1689
1690 #if 0 /* FIX */
1691 static bool eap_fast_has_reauth_data(struct eap_sm *sm, void *priv)
1692 {
1693 struct eap_fast_data *data = priv;
1694 return tls_connection_established(sm->ssl_ctx, data->ssl.conn);
1695 }
1696
1697
1698 static void eap_fast_deinit_for_reauth(struct eap_sm *sm, void *priv)
1699 {
1700 struct eap_fast_data *data = priv;
1701
1702 if (data->phase2_priv && data->phase2_method &&
1703 data->phase2_method->deinit_for_reauth)
1704 data->phase2_method->deinit_for_reauth(sm, data->phase2_priv);
1705 os_free(data->key_block_p);
1706 data->key_block_p = NULL;
1707 wpabuf_clear_free(data->pending_phase2_req);
1708 data->pending_phase2_req = NULL;
1709 wpabuf_clear_free(data->pending_resp);
1710 data->pending_resp = NULL;
1711 }
1712
1713
1714 static void * eap_fast_init_for_reauth(struct eap_sm *sm, void *priv)
1715 {
1716 struct eap_fast_data *data = priv;
1717 if (eap_peer_tls_reauth_init(sm, &data->ssl)) {
1718 os_free(data);
1719 return NULL;
1720 }
1721 os_memset(data->key_data, 0, EAP_FAST_KEY_LEN);
1722 os_memset(data->emsk, 0, EAP_EMSK_LEN);
1723 os_free(data->session_id);
1724 data->session_id = NULL;
1725 if (data->phase2_priv && data->phase2_method &&
1726 data->phase2_method->init_for_reauth)
1727 data->phase2_method->init_for_reauth(sm, data->phase2_priv);
1728 data->phase2_success = 0;
1729 data->resuming = 1;
1730 data->provisioning = 0;
1731 data->anon_provisioning = 0;
1732 data->simck_idx = 0;
1733 return priv;
1734 }
1735 #endif
1736
1737
eap_fast_get_status(struct eap_sm * sm,void * priv,char * buf,size_t buflen,int verbose)1738 static int eap_fast_get_status(struct eap_sm *sm, void *priv, char *buf,
1739 size_t buflen, int verbose)
1740 {
1741 struct eap_fast_data *data = priv;
1742 int len, ret;
1743
1744 len = eap_peer_tls_status(sm, &data->ssl, buf, buflen, verbose);
1745 if (data->phase2_method) {
1746 ret = os_snprintf(buf + len, buflen - len,
1747 "EAP-FAST Phase2 method=%s\n",
1748 data->phase2_method->name);
1749 if (os_snprintf_error(buflen - len, ret))
1750 return len;
1751 len += ret;
1752 }
1753 return len;
1754 }
1755
1756
eap_fast_isKeyAvailable(struct eap_sm * sm,void * priv)1757 static bool eap_fast_isKeyAvailable(struct eap_sm *sm, void *priv)
1758 {
1759 struct eap_fast_data *data = priv;
1760 return data->success;
1761 }
1762
1763
eap_fast_getKey(struct eap_sm * sm,void * priv,size_t * len)1764 static u8 * eap_fast_getKey(struct eap_sm *sm, void *priv, size_t *len)
1765 {
1766 struct eap_fast_data *data = priv;
1767 u8 *key;
1768
1769 if (!data->success)
1770 return NULL;
1771
1772 key = os_memdup(data->key_data, EAP_FAST_KEY_LEN);
1773 if (key == NULL)
1774 return NULL;
1775
1776 *len = EAP_FAST_KEY_LEN;
1777
1778 return key;
1779 }
1780
1781
eap_fast_get_session_id(struct eap_sm * sm,void * priv,size_t * len)1782 static u8 * eap_fast_get_session_id(struct eap_sm *sm, void *priv, size_t *len)
1783 {
1784 struct eap_fast_data *data = priv;
1785 u8 *id;
1786
1787 if (!data->success || !data->session_id)
1788 return NULL;
1789
1790 id = os_memdup(data->session_id, data->id_len);
1791 if (id == NULL)
1792 return NULL;
1793
1794 *len = data->id_len;
1795
1796 return id;
1797 }
1798
1799
eap_fast_get_emsk(struct eap_sm * sm,void * priv,size_t * len)1800 static u8 * eap_fast_get_emsk(struct eap_sm *sm, void *priv, size_t *len)
1801 {
1802 struct eap_fast_data *data = priv;
1803 u8 *key;
1804
1805 if (!data->success)
1806 return NULL;
1807
1808 key = os_memdup(data->emsk, EAP_EMSK_LEN);
1809 if (key == NULL)
1810 return NULL;
1811
1812 *len = EAP_EMSK_LEN;
1813
1814 return key;
1815 }
1816
1817
eap_peer_fast_register(void)1818 int eap_peer_fast_register(void)
1819 {
1820 struct eap_method *eap;
1821
1822 eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
1823 EAP_VENDOR_IETF, EAP_TYPE_FAST, "FAST");
1824 if (eap == NULL)
1825 return -1;
1826
1827 eap->init = eap_fast_init;
1828 eap->deinit = eap_fast_deinit;
1829 eap->process = eap_fast_process;
1830 eap->isKeyAvailable = eap_fast_isKeyAvailable;
1831 eap->getKey = eap_fast_getKey;
1832 eap->getSessionId = eap_fast_get_session_id;
1833 eap->get_status = eap_fast_get_status;
1834 #if 0
1835 eap->has_reauth_data = eap_fast_has_reauth_data;
1836 eap->deinit_for_reauth = eap_fast_deinit_for_reauth;
1837 eap->init_for_reauth = eap_fast_init_for_reauth;
1838 #endif
1839 eap->get_emsk = eap_fast_get_emsk;
1840
1841 return eap_peer_method_register(eap);
1842 }
1843