Line data Source code
1 : /*
2 : * EAP peer method: EAP-FAST (RFC 4851)
3 : * Copyright (c) 2004-2008, 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 : };
71 :
72 :
73 18 : 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 18 : struct eap_fast_data *data = ctx;
79 :
80 18 : wpa_printf(MSG_DEBUG, "EAP-FAST: SessionTicket callback");
81 :
82 18 : if (client_random == NULL || server_random == NULL ||
83 : master_secret == NULL) {
84 0 : wpa_printf(MSG_DEBUG, "EAP-FAST: SessionTicket failed - fall "
85 : "back to full TLS handshake");
86 0 : data->session_ticket_used = 0;
87 0 : if (data->provisioning_allowed) {
88 0 : wpa_printf(MSG_DEBUG, "EAP-FAST: Try to provision a "
89 : "new PAC-Key");
90 0 : data->provisioning = 1;
91 0 : data->current_pac = NULL;
92 : }
93 0 : return 0;
94 : }
95 :
96 18 : wpa_hexdump(MSG_DEBUG, "EAP-FAST: SessionTicket", ticket, len);
97 :
98 18 : if (data->current_pac == NULL) {
99 9 : wpa_printf(MSG_DEBUG, "EAP-FAST: No PAC-Key available for "
100 : "using SessionTicket");
101 9 : data->session_ticket_used = 0;
102 9 : return 0;
103 : }
104 :
105 9 : eap_fast_derive_master_secret(data->current_pac->pac_key,
106 : server_random, client_random,
107 : master_secret);
108 :
109 9 : data->session_ticket_used = 1;
110 :
111 9 : return 1;
112 : }
113 :
114 :
115 17 : static int eap_fast_parse_phase1(struct eap_fast_data *data,
116 : const char *phase1)
117 : {
118 : const char *pos;
119 :
120 17 : pos = os_strstr(phase1, "fast_provisioning=");
121 17 : if (pos) {
122 16 : data->provisioning_allowed = atoi(pos + 18);
123 16 : wpa_printf(MSG_DEBUG, "EAP-FAST: Automatic PAC provisioning "
124 : "mode: %d", data->provisioning_allowed);
125 : }
126 :
127 17 : pos = os_strstr(phase1, "fast_max_pac_list_len=");
128 17 : if (pos) {
129 3 : data->max_pac_list_len = atoi(pos + 22);
130 3 : if (data->max_pac_list_len == 0)
131 0 : data->max_pac_list_len = 1;
132 3 : wpa_printf(MSG_DEBUG, "EAP-FAST: Maximum PAC list length: %lu",
133 : (unsigned long) data->max_pac_list_len);
134 : }
135 :
136 17 : pos = os_strstr(phase1, "fast_pac_format=binary");
137 17 : if (pos) {
138 6 : data->use_pac_binary_format = 1;
139 6 : wpa_printf(MSG_DEBUG, "EAP-FAST: Using binary format for PAC "
140 : "list");
141 : }
142 :
143 17 : return 0;
144 : }
145 :
146 :
147 20 : static void * eap_fast_init(struct eap_sm *sm)
148 : {
149 : struct eap_fast_data *data;
150 20 : struct eap_peer_config *config = eap_get_config(sm);
151 :
152 20 : if (config == NULL)
153 0 : return NULL;
154 :
155 20 : data = os_zalloc(sizeof(*data));
156 20 : if (data == NULL)
157 0 : return NULL;
158 20 : data->fast_version = EAP_FAST_VERSION;
159 20 : data->max_pac_list_len = 10;
160 :
161 20 : if (config->phase1 && eap_fast_parse_phase1(data, config->phase1) < 0) {
162 0 : eap_fast_deinit(sm, data);
163 0 : return NULL;
164 : }
165 :
166 20 : if (eap_peer_select_phase2_methods(config, "auth=",
167 : &data->phase2_types,
168 : &data->num_phase2_types) < 0) {
169 0 : eap_fast_deinit(sm, data);
170 0 : return NULL;
171 : }
172 :
173 20 : data->phase2_type.vendor = EAP_VENDOR_IETF;
174 20 : data->phase2_type.method = EAP_TYPE_NONE;
175 :
176 20 : if (eap_peer_tls_ssl_init(sm, &data->ssl, config, EAP_TYPE_FAST)) {
177 0 : wpa_printf(MSG_INFO, "EAP-FAST: Failed to initialize SSL.");
178 0 : eap_fast_deinit(sm, data);
179 0 : return NULL;
180 : }
181 :
182 20 : if (tls_connection_set_session_ticket_cb(sm->ssl_ctx, data->ssl.conn,
183 : eap_fast_session_ticket_cb,
184 : data) < 0) {
185 0 : wpa_printf(MSG_INFO, "EAP-FAST: Failed to set SessionTicket "
186 : "callback");
187 0 : eap_fast_deinit(sm, data);
188 0 : return NULL;
189 : }
190 :
191 : /*
192 : * The local RADIUS server in a Cisco AP does not seem to like empty
193 : * fragments before data, so disable that workaround for CBC.
194 : * TODO: consider making this configurable
195 : */
196 20 : if (tls_connection_enable_workaround(sm->ssl_ctx, data->ssl.conn)) {
197 0 : wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to enable TLS "
198 : "workarounds");
199 : }
200 :
201 20 : if (!config->pac_file) {
202 1 : wpa_printf(MSG_INFO, "EAP-FAST: No PAC file configured");
203 1 : eap_fast_deinit(sm, data);
204 1 : return NULL;
205 : }
206 :
207 25 : if (data->use_pac_binary_format &&
208 6 : eap_fast_load_pac_bin(sm, &data->pac, config->pac_file) < 0) {
209 0 : wpa_printf(MSG_INFO, "EAP-FAST: Failed to load PAC file");
210 0 : eap_fast_deinit(sm, data);
211 0 : return NULL;
212 : }
213 :
214 32 : if (!data->use_pac_binary_format &&
215 13 : eap_fast_load_pac(sm, &data->pac, config->pac_file) < 0) {
216 0 : wpa_printf(MSG_INFO, "EAP-FAST: Failed to load PAC file");
217 0 : eap_fast_deinit(sm, data);
218 0 : return NULL;
219 : }
220 19 : eap_fast_pac_list_truncate(data->pac, data->max_pac_list_len);
221 :
222 19 : if (data->pac == NULL && !data->provisioning_allowed) {
223 1 : wpa_printf(MSG_INFO, "EAP-FAST: No PAC configured and "
224 : "provisioning disabled");
225 1 : eap_fast_deinit(sm, data);
226 1 : return NULL;
227 : }
228 :
229 18 : return data;
230 : }
231 :
232 :
233 20 : static void eap_fast_deinit(struct eap_sm *sm, void *priv)
234 : {
235 20 : struct eap_fast_data *data = priv;
236 : struct eap_fast_pac *pac, *prev;
237 :
238 20 : if (data == NULL)
239 20 : return;
240 20 : if (data->phase2_priv && data->phase2_method)
241 18 : data->phase2_method->deinit(sm, data->phase2_priv);
242 20 : os_free(data->phase2_types);
243 20 : os_free(data->key_block_p);
244 20 : eap_peer_tls_ssl_deinit(sm, &data->ssl);
245 :
246 20 : pac = data->pac;
247 20 : prev = NULL;
248 58 : while (pac) {
249 18 : prev = pac;
250 18 : pac = pac->next;
251 18 : eap_fast_free_pac(prev);
252 : }
253 20 : os_free(data->session_id);
254 20 : wpabuf_free(data->pending_phase2_req);
255 20 : os_free(data);
256 : }
257 :
258 :
259 15 : static int eap_fast_derive_msk(struct eap_fast_data *data)
260 : {
261 15 : eap_fast_derive_eap_msk(data->simck, data->key_data);
262 15 : eap_fast_derive_eap_emsk(data->simck, data->emsk);
263 15 : data->success = 1;
264 15 : return 0;
265 : }
266 :
267 :
268 14 : static void 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 14 : sks = eap_fast_derive_key(sm->ssl_ctx, data->ssl.conn, "key expansion",
278 : EAP_FAST_SKS_LEN);
279 14 : if (sks == NULL) {
280 0 : wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to derive "
281 : "session_key_seed");
282 14 : return;
283 : }
284 :
285 : /*
286 : * RFC 4851, Section 5.2:
287 : * S-IMCK[0] = session_key_seed
288 : */
289 14 : wpa_hexdump_key(MSG_DEBUG,
290 : "EAP-FAST: session_key_seed (SKS = S-IMCK[0])",
291 : sks, EAP_FAST_SKS_LEN);
292 14 : data->simck_idx = 0;
293 14 : os_memcpy(data->simck, sks, EAP_FAST_SIMCK_LEN);
294 14 : os_free(sks);
295 : }
296 :
297 :
298 4 : static void eap_fast_derive_key_provisioning(struct eap_sm *sm,
299 : struct eap_fast_data *data)
300 : {
301 4 : os_free(data->key_block_p);
302 4 : data->key_block_p = (struct eap_fast_key_block_provisioning *)
303 4 : eap_fast_derive_key(sm->ssl_ctx, data->ssl.conn,
304 : "key expansion",
305 : sizeof(*data->key_block_p));
306 4 : if (data->key_block_p == NULL) {
307 0 : wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to derive key block");
308 4 : return;
309 : }
310 : /*
311 : * RFC 4851, Section 5.2:
312 : * S-IMCK[0] = session_key_seed
313 : */
314 4 : wpa_hexdump_key(MSG_DEBUG,
315 : "EAP-FAST: session_key_seed (SKS = S-IMCK[0])",
316 4 : data->key_block_p->session_key_seed,
317 : sizeof(data->key_block_p->session_key_seed));
318 4 : data->simck_idx = 0;
319 4 : os_memcpy(data->simck, data->key_block_p->session_key_seed,
320 : EAP_FAST_SIMCK_LEN);
321 4 : wpa_hexdump_key(MSG_DEBUG, "EAP-FAST: server_challenge",
322 4 : data->key_block_p->server_challenge,
323 : sizeof(data->key_block_p->server_challenge));
324 4 : wpa_hexdump_key(MSG_DEBUG, "EAP-FAST: client_challenge",
325 4 : data->key_block_p->client_challenge,
326 : sizeof(data->key_block_p->client_challenge));
327 : }
328 :
329 :
330 18 : static void eap_fast_derive_keys(struct eap_sm *sm, struct eap_fast_data *data)
331 : {
332 18 : if (data->anon_provisioning)
333 4 : eap_fast_derive_key_provisioning(sm, data);
334 : else
335 14 : eap_fast_derive_key_auth(sm, data);
336 18 : }
337 :
338 :
339 19 : static int eap_fast_init_phase2_method(struct eap_sm *sm,
340 : struct eap_fast_data *data)
341 : {
342 19 : data->phase2_method =
343 19 : eap_peer_get_eap_method(data->phase2_type.vendor,
344 19 : data->phase2_type.method);
345 19 : if (data->phase2_method == NULL)
346 0 : return -1;
347 :
348 19 : if (data->key_block_p) {
349 4 : sm->auth_challenge = data->key_block_p->server_challenge;
350 4 : sm->peer_challenge = data->key_block_p->client_challenge;
351 : }
352 19 : sm->init_phase2 = 1;
353 19 : data->phase2_priv = data->phase2_method->init(sm);
354 19 : sm->init_phase2 = 0;
355 19 : sm->auth_challenge = NULL;
356 19 : sm->peer_challenge = NULL;
357 :
358 19 : return data->phase2_priv == NULL ? -1 : 0;
359 : }
360 :
361 :
362 23 : static int eap_fast_select_phase2_method(struct eap_fast_data *data, u8 type)
363 : {
364 : size_t i;
365 :
366 : /* TODO: TNC with anonymous provisioning; need to require both
367 : * completed MSCHAPv2 and TNC */
368 :
369 23 : if (data->anon_provisioning && type != EAP_TYPE_MSCHAPV2) {
370 0 : wpa_printf(MSG_INFO, "EAP-FAST: Only EAP-MSCHAPv2 is allowed "
371 : "during unauthenticated provisioning; reject phase2"
372 : " type %d", type);
373 0 : return -1;
374 : }
375 :
376 : #ifdef EAP_TNC
377 23 : if (type == EAP_TYPE_TNC) {
378 1 : data->phase2_type.vendor = EAP_VENDOR_IETF;
379 1 : data->phase2_type.method = EAP_TYPE_TNC;
380 1 : wpa_printf(MSG_DEBUG, "EAP-FAST: Selected Phase 2 EAP "
381 : "vendor %d method %d for TNC",
382 : data->phase2_type.vendor,
383 : data->phase2_type.method);
384 1 : return 0;
385 : }
386 : #endif /* EAP_TNC */
387 :
388 52 : for (i = 0; i < data->num_phase2_types; i++) {
389 44 : if (data->phase2_types[i].vendor != EAP_VENDOR_IETF ||
390 22 : data->phase2_types[i].method != type)
391 4 : continue;
392 :
393 18 : data->phase2_type.vendor = data->phase2_types[i].vendor;
394 18 : data->phase2_type.method = data->phase2_types[i].method;
395 18 : wpa_printf(MSG_DEBUG, "EAP-FAST: Selected Phase 2 EAP "
396 : "vendor %d method %d",
397 : data->phase2_type.vendor,
398 : data->phase2_type.method);
399 18 : break;
400 : }
401 :
402 22 : if (type != data->phase2_type.method || type == EAP_TYPE_NONE)
403 4 : return -1;
404 :
405 18 : return 0;
406 : }
407 :
408 :
409 48 : static int eap_fast_phase2_request(struct eap_sm *sm,
410 : struct eap_fast_data *data,
411 : struct eap_method_ret *ret,
412 : struct eap_hdr *hdr,
413 : struct wpabuf **resp)
414 : {
415 48 : size_t len = be_to_host16(hdr->length);
416 : u8 *pos;
417 : struct eap_method_ret iret;
418 48 : struct eap_peer_config *config = eap_get_config(sm);
419 : struct wpabuf msg;
420 :
421 48 : if (len <= sizeof(struct eap_hdr)) {
422 0 : wpa_printf(MSG_INFO, "EAP-FAST: too short "
423 : "Phase 2 request (len=%lu)", (unsigned long) len);
424 0 : return -1;
425 : }
426 48 : pos = (u8 *) (hdr + 1);
427 48 : wpa_printf(MSG_DEBUG, "EAP-FAST: Phase 2 Request: type=%d", *pos);
428 48 : if (*pos == EAP_TYPE_IDENTITY) {
429 9 : *resp = eap_sm_buildIdentity(sm, hdr->identifier, 1);
430 9 : return 0;
431 : }
432 :
433 56 : if (data->phase2_priv && data->phase2_method &&
434 17 : *pos != data->phase2_type.method) {
435 1 : wpa_printf(MSG_DEBUG, "EAP-FAST: Phase 2 EAP sequence - "
436 : "deinitialize previous method");
437 1 : data->phase2_method->deinit(sm, data->phase2_priv);
438 1 : data->phase2_method = NULL;
439 1 : data->phase2_priv = NULL;
440 1 : data->phase2_type.vendor = EAP_VENDOR_IETF;
441 1 : data->phase2_type.method = EAP_TYPE_NONE;
442 : }
443 :
444 78 : if (data->phase2_type.vendor == EAP_VENDOR_IETF &&
445 62 : data->phase2_type.method == EAP_TYPE_NONE &&
446 23 : eap_fast_select_phase2_method(data, *pos) < 0) {
447 4 : if (eap_peer_tls_phase2_nak(data->phase2_types,
448 : data->num_phase2_types,
449 : hdr, resp))
450 0 : return -1;
451 4 : return 0;
452 : }
453 :
454 54 : if ((data->phase2_priv == NULL &&
455 54 : eap_fast_init_phase2_method(sm, data) < 0) ||
456 35 : data->phase2_method == NULL) {
457 0 : wpa_printf(MSG_INFO, "EAP-FAST: Failed to initialize "
458 0 : "Phase 2 EAP method %d", *pos);
459 0 : ret->methodState = METHOD_DONE;
460 0 : ret->decision = DECISION_FAIL;
461 0 : return -1;
462 : }
463 :
464 35 : os_memset(&iret, 0, sizeof(iret));
465 35 : wpabuf_set(&msg, hdr, len);
466 35 : *resp = data->phase2_method->process(sm, data->phase2_priv, &iret,
467 : &msg);
468 70 : if (*resp == NULL ||
469 48 : (iret.methodState == METHOD_DONE &&
470 13 : iret.decision == DECISION_FAIL)) {
471 0 : ret->methodState = METHOD_DONE;
472 0 : ret->decision = DECISION_FAIL;
473 57 : } else if ((iret.methodState == METHOD_DONE ||
474 57 : iret.methodState == METHOD_MAY_CONT) &&
475 56 : (iret.decision == DECISION_UNCOND_SUCC ||
476 21 : iret.decision == DECISION_COND_SUCC)) {
477 19 : data->phase2_success = 1;
478 : }
479 :
480 35 : if (*resp == NULL && config &&
481 0 : (config->pending_req_identity || config->pending_req_password ||
482 0 : config->pending_req_otp || config->pending_req_new_password)) {
483 0 : wpabuf_free(data->pending_phase2_req);
484 0 : data->pending_phase2_req = wpabuf_alloc_copy(hdr, len);
485 35 : } else if (*resp == NULL)
486 0 : return -1;
487 :
488 35 : return 0;
489 : }
490 :
491 :
492 0 : static struct wpabuf * eap_fast_tlv_nak(int vendor_id, int tlv_type)
493 : {
494 : struct wpabuf *buf;
495 : struct eap_tlv_nak_tlv *nak;
496 0 : buf = wpabuf_alloc(sizeof(*nak));
497 0 : if (buf == NULL)
498 0 : return NULL;
499 0 : nak = wpabuf_put(buf, sizeof(*nak));
500 0 : nak->tlv_type = host_to_be16(EAP_TLV_TYPE_MANDATORY | EAP_TLV_NAK_TLV);
501 0 : nak->length = host_to_be16(6);
502 0 : nak->vendor_id = host_to_be32(vendor_id);
503 0 : nak->nak_type = host_to_be16(tlv_type);
504 0 : return buf;
505 : }
506 :
507 :
508 29 : static struct wpabuf * eap_fast_tlv_result(int status, int intermediate)
509 : {
510 : struct wpabuf *buf;
511 : struct eap_tlv_intermediate_result_tlv *result;
512 29 : buf = wpabuf_alloc(sizeof(*result));
513 29 : if (buf == NULL)
514 0 : return NULL;
515 29 : wpa_printf(MSG_DEBUG, "EAP-FAST: Add %sResult TLV(status=%d)",
516 : intermediate ? "Intermediate " : "", status);
517 29 : result = wpabuf_put(buf, sizeof(*result));
518 29 : result->tlv_type = host_to_be16(EAP_TLV_TYPE_MANDATORY |
519 : (intermediate ?
520 : EAP_TLV_INTERMEDIATE_RESULT_TLV :
521 : EAP_TLV_RESULT_TLV));
522 29 : result->length = host_to_be16(2);
523 29 : result->status = host_to_be16(status);
524 29 : return buf;
525 : }
526 :
527 :
528 9 : static struct wpabuf * eap_fast_tlv_pac_ack(void)
529 : {
530 : struct wpabuf *buf;
531 : struct eap_tlv_result_tlv *res;
532 : struct eap_tlv_pac_ack_tlv *ack;
533 :
534 9 : buf = wpabuf_alloc(sizeof(*res) + sizeof(*ack));
535 9 : if (buf == NULL)
536 0 : return NULL;
537 :
538 9 : wpa_printf(MSG_DEBUG, "EAP-FAST: Add PAC TLV (ack)");
539 9 : ack = wpabuf_put(buf, sizeof(*ack));
540 9 : ack->tlv_type = host_to_be16(EAP_TLV_PAC_TLV |
541 : EAP_TLV_TYPE_MANDATORY);
542 9 : ack->length = host_to_be16(sizeof(*ack) - sizeof(struct eap_tlv_hdr));
543 9 : ack->pac_type = host_to_be16(PAC_TYPE_PAC_ACKNOWLEDGEMENT);
544 9 : ack->pac_len = host_to_be16(2);
545 9 : ack->result = host_to_be16(EAP_TLV_RESULT_SUCCESS);
546 :
547 9 : return buf;
548 : }
549 :
550 :
551 48 : static struct wpabuf * eap_fast_process_eap_payload_tlv(
552 : struct eap_sm *sm, struct eap_fast_data *data,
553 : struct eap_method_ret *ret,
554 : u8 *eap_payload_tlv, size_t eap_payload_tlv_len)
555 : {
556 : struct eap_hdr *hdr;
557 48 : struct wpabuf *resp = NULL;
558 :
559 48 : if (eap_payload_tlv_len < sizeof(*hdr)) {
560 0 : wpa_printf(MSG_DEBUG, "EAP-FAST: too short EAP "
561 : "Payload TLV (len=%lu)",
562 : (unsigned long) eap_payload_tlv_len);
563 0 : return NULL;
564 : }
565 :
566 48 : hdr = (struct eap_hdr *) eap_payload_tlv;
567 48 : if (be_to_host16(hdr->length) > eap_payload_tlv_len) {
568 0 : wpa_printf(MSG_DEBUG, "EAP-FAST: EAP packet overflow in "
569 : "EAP Payload TLV");
570 0 : return NULL;
571 : }
572 :
573 48 : if (hdr->code != EAP_CODE_REQUEST) {
574 0 : wpa_printf(MSG_INFO, "EAP-FAST: Unexpected code=%d in "
575 0 : "Phase 2 EAP header", hdr->code);
576 0 : return NULL;
577 : }
578 :
579 48 : if (eap_fast_phase2_request(sm, data, ret, hdr, &resp)) {
580 0 : wpa_printf(MSG_INFO, "EAP-FAST: Phase2 Request processing "
581 : "failed");
582 0 : return NULL;
583 : }
584 :
585 48 : return eap_fast_tlv_eap_payload(resp);
586 : }
587 :
588 :
589 19 : static int eap_fast_validate_crypto_binding(
590 : struct eap_tlv_crypto_binding_tlv *_bind)
591 : {
592 57 : wpa_printf(MSG_DEBUG, "EAP-FAST: Crypto-Binding TLV: Version %d "
593 : "Received Version %d SubType %d",
594 57 : _bind->version, _bind->received_version, _bind->subtype);
595 19 : wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: NONCE",
596 19 : _bind->nonce, sizeof(_bind->nonce));
597 19 : wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Compound MAC",
598 19 : _bind->compound_mac, sizeof(_bind->compound_mac));
599 :
600 38 : if (_bind->version != EAP_FAST_VERSION ||
601 38 : _bind->received_version != EAP_FAST_VERSION ||
602 19 : _bind->subtype != EAP_TLV_CRYPTO_BINDING_SUBTYPE_REQUEST) {
603 0 : wpa_printf(MSG_INFO, "EAP-FAST: Invalid version/subtype in "
604 : "Crypto-Binding TLV: Version %d "
605 : "Received Version %d SubType %d",
606 0 : _bind->version, _bind->received_version,
607 0 : _bind->subtype);
608 0 : return -1;
609 : }
610 :
611 19 : return 0;
612 : }
613 :
614 :
615 19 : static void eap_fast_write_crypto_binding(
616 : struct eap_tlv_crypto_binding_tlv *rbind,
617 : struct eap_tlv_crypto_binding_tlv *_bind, const u8 *cmk)
618 : {
619 19 : rbind->tlv_type = host_to_be16(EAP_TLV_TYPE_MANDATORY |
620 : EAP_TLV_CRYPTO_BINDING_TLV);
621 19 : rbind->length = host_to_be16(sizeof(*rbind) -
622 : sizeof(struct eap_tlv_hdr));
623 19 : rbind->version = EAP_FAST_VERSION;
624 19 : rbind->received_version = _bind->version;
625 19 : rbind->subtype = EAP_TLV_CRYPTO_BINDING_SUBTYPE_RESPONSE;
626 19 : os_memcpy(rbind->nonce, _bind->nonce, sizeof(_bind->nonce));
627 19 : inc_byte_array(rbind->nonce, sizeof(rbind->nonce));
628 19 : hmac_sha1(cmk, EAP_FAST_CMK_LEN, (u8 *) rbind, sizeof(*rbind),
629 19 : rbind->compound_mac);
630 :
631 57 : wpa_printf(MSG_DEBUG, "EAP-FAST: Reply Crypto-Binding TLV: Version %d "
632 : "Received Version %d SubType %d",
633 57 : rbind->version, rbind->received_version, rbind->subtype);
634 19 : wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: NONCE",
635 19 : rbind->nonce, sizeof(rbind->nonce));
636 19 : wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Compound MAC",
637 19 : rbind->compound_mac, sizeof(rbind->compound_mac));
638 19 : }
639 :
640 :
641 19 : static int eap_fast_get_phase2_key(struct eap_sm *sm,
642 : struct eap_fast_data *data,
643 : u8 *isk, size_t isk_len)
644 : {
645 : u8 *key;
646 : size_t key_len;
647 :
648 19 : os_memset(isk, 0, isk_len);
649 :
650 19 : if (data->phase2_method == NULL || data->phase2_priv == NULL) {
651 0 : wpa_printf(MSG_DEBUG, "EAP-FAST: Phase 2 method not "
652 : "available");
653 0 : return -1;
654 : }
655 :
656 33 : if (data->phase2_method->isKeyAvailable == NULL ||
657 14 : data->phase2_method->getKey == NULL)
658 5 : return 0;
659 :
660 28 : if (!data->phase2_method->isKeyAvailable(sm, data->phase2_priv) ||
661 14 : (key = data->phase2_method->getKey(sm, data->phase2_priv,
662 : &key_len)) == NULL) {
663 0 : wpa_printf(MSG_DEBUG, "EAP-FAST: Could not get key material "
664 : "from Phase 2");
665 0 : return -1;
666 : }
667 :
668 14 : if (key_len > isk_len)
669 1 : key_len = isk_len;
670 28 : if (key_len == 32 &&
671 28 : data->phase2_method->vendor == EAP_VENDOR_IETF &&
672 14 : data->phase2_method->method == EAP_TYPE_MSCHAPV2) {
673 : /*
674 : * EAP-FAST uses reverse order for MS-MPPE keys when deriving
675 : * MSK from EAP-MSCHAPv2. Swap the keys here to get the correct
676 : * ISK for EAP-FAST cryptobinding.
677 : */
678 13 : os_memcpy(isk, key + 16, 16);
679 13 : os_memcpy(isk + 16, key, 16);
680 : } else
681 1 : os_memcpy(isk, key, key_len);
682 14 : os_free(key);
683 :
684 14 : return 0;
685 : }
686 :
687 :
688 19 : static int eap_fast_get_cmk(struct eap_sm *sm, struct eap_fast_data *data,
689 : u8 *cmk)
690 : {
691 : u8 isk[32], imck[60];
692 :
693 19 : wpa_printf(MSG_DEBUG, "EAP-FAST: Determining CMK[%d] for Compound MIC "
694 19 : "calculation", data->simck_idx + 1);
695 :
696 : /*
697 : * RFC 4851, Section 5.2:
698 : * IMCK[j] = T-PRF(S-IMCK[j-1], "Inner Methods Compound Keys",
699 : * MSK[j], 60)
700 : * S-IMCK[j] = first 40 octets of IMCK[j]
701 : * CMK[j] = last 20 octets of IMCK[j]
702 : */
703 :
704 19 : if (eap_fast_get_phase2_key(sm, data, isk, sizeof(isk)) < 0)
705 0 : return -1;
706 19 : wpa_hexdump_key(MSG_MSGDUMP, "EAP-FAST: ISK[j]", isk, sizeof(isk));
707 19 : sha1_t_prf(data->simck, EAP_FAST_SIMCK_LEN,
708 : "Inner Methods Compound Keys",
709 : isk, sizeof(isk), imck, sizeof(imck));
710 19 : data->simck_idx++;
711 19 : os_memcpy(data->simck, imck, EAP_FAST_SIMCK_LEN);
712 19 : wpa_hexdump_key(MSG_MSGDUMP, "EAP-FAST: S-IMCK[j]",
713 19 : data->simck, EAP_FAST_SIMCK_LEN);
714 19 : os_memcpy(cmk, imck + EAP_FAST_SIMCK_LEN, EAP_FAST_CMK_LEN);
715 19 : wpa_hexdump_key(MSG_MSGDUMP, "EAP-FAST: CMK[j]",
716 : cmk, EAP_FAST_CMK_LEN);
717 :
718 19 : return 0;
719 : }
720 :
721 :
722 6 : static u8 * eap_fast_write_pac_request(u8 *pos, u16 pac_type)
723 : {
724 : struct eap_tlv_hdr *pac;
725 : struct eap_tlv_request_action_tlv *act;
726 : struct eap_tlv_pac_type_tlv *type;
727 :
728 6 : act = (struct eap_tlv_request_action_tlv *) pos;
729 6 : act->tlv_type = host_to_be16(EAP_TLV_REQUEST_ACTION_TLV);
730 6 : act->length = host_to_be16(2);
731 6 : act->action = host_to_be16(EAP_TLV_ACTION_PROCESS_TLV);
732 :
733 6 : pac = (struct eap_tlv_hdr *) (act + 1);
734 6 : pac->tlv_type = host_to_be16(EAP_TLV_PAC_TLV);
735 6 : pac->length = host_to_be16(sizeof(*type));
736 :
737 6 : type = (struct eap_tlv_pac_type_tlv *) (pac + 1);
738 6 : type->tlv_type = host_to_be16(PAC_TYPE_PAC_TYPE);
739 6 : type->length = host_to_be16(2);
740 6 : type->pac_type = host_to_be16(pac_type);
741 :
742 6 : return (u8 *) (type + 1);
743 : }
744 :
745 :
746 19 : static struct wpabuf * eap_fast_process_crypto_binding(
747 : struct eap_sm *sm, struct eap_fast_data *data,
748 : struct eap_method_ret *ret,
749 : struct eap_tlv_crypto_binding_tlv *_bind, size_t bind_len)
750 : {
751 : struct wpabuf *resp;
752 : u8 *pos;
753 : u8 cmk[EAP_FAST_CMK_LEN], cmac[SHA1_MAC_LEN];
754 : int res;
755 : size_t len;
756 :
757 19 : if (eap_fast_validate_crypto_binding(_bind) < 0)
758 0 : return NULL;
759 :
760 19 : if (eap_fast_get_cmk(sm, data, cmk) < 0)
761 0 : return NULL;
762 :
763 : /* Validate received Compound MAC */
764 19 : os_memcpy(cmac, _bind->compound_mac, sizeof(cmac));
765 19 : os_memset(_bind->compound_mac, 0, sizeof(cmac));
766 19 : wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Crypto-Binding TLV for Compound "
767 : "MAC calculation", (u8 *) _bind, bind_len);
768 19 : hmac_sha1(cmk, EAP_FAST_CMK_LEN, (u8 *) _bind, bind_len,
769 19 : _bind->compound_mac);
770 19 : res = os_memcmp(cmac, _bind->compound_mac, sizeof(cmac));
771 19 : wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Received Compound MAC",
772 : cmac, sizeof(cmac));
773 19 : wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Calculated Compound MAC",
774 19 : _bind->compound_mac, sizeof(cmac));
775 19 : if (res != 0) {
776 0 : wpa_printf(MSG_INFO, "EAP-FAST: Compound MAC did not match");
777 0 : os_memcpy(_bind->compound_mac, cmac, sizeof(cmac));
778 0 : return NULL;
779 : }
780 :
781 : /*
782 : * Compound MAC was valid, so authentication succeeded. Reply with
783 : * crypto binding to allow server to complete authentication.
784 : */
785 :
786 19 : len = sizeof(struct eap_tlv_crypto_binding_tlv);
787 19 : resp = wpabuf_alloc(len);
788 19 : if (resp == NULL)
789 0 : return NULL;
790 :
791 34 : if (!data->anon_provisioning && data->phase2_success &&
792 15 : eap_fast_derive_msk(data) < 0) {
793 0 : wpa_printf(MSG_INFO, "EAP-FAST: Failed to generate MSK");
794 0 : ret->methodState = METHOD_DONE;
795 0 : ret->decision = DECISION_FAIL;
796 0 : data->phase2_success = 0;
797 0 : wpabuf_free(resp);
798 0 : return NULL;
799 : }
800 :
801 19 : if (!data->anon_provisioning && data->phase2_success) {
802 15 : os_free(data->session_id);
803 15 : data->session_id = eap_peer_tls_derive_session_id(
804 : sm, &data->ssl, EAP_TYPE_FAST, &data->id_len);
805 15 : if (data->session_id) {
806 30 : wpa_hexdump(MSG_DEBUG, "EAP-FAST: Derived Session-Id",
807 15 : data->session_id, data->id_len);
808 : } else {
809 0 : wpa_printf(MSG_ERROR, "EAP-FAST: Failed to derive "
810 : "Session-Id");
811 0 : wpabuf_free(resp);
812 0 : return NULL;
813 : }
814 : }
815 :
816 19 : pos = wpabuf_put(resp, sizeof(struct eap_tlv_crypto_binding_tlv));
817 19 : eap_fast_write_crypto_binding((struct eap_tlv_crypto_binding_tlv *)
818 : pos, _bind, cmk);
819 :
820 19 : return resp;
821 : }
822 :
823 :
824 27 : static void eap_fast_parse_pac_tlv(struct eap_fast_pac *entry, int type,
825 : u8 *pos, size_t len, int *pac_key_found)
826 : {
827 27 : switch (type & 0x7fff) {
828 : case PAC_TYPE_PAC_KEY:
829 9 : wpa_hexdump_key(MSG_DEBUG, "EAP-FAST: PAC-Key", pos, len);
830 9 : if (len != EAP_FAST_PAC_KEY_LEN) {
831 0 : wpa_printf(MSG_DEBUG, "EAP-FAST: Invalid PAC-Key "
832 : "length %lu", (unsigned long) len);
833 0 : break;
834 : }
835 9 : *pac_key_found = 1;
836 9 : os_memcpy(entry->pac_key, pos, len);
837 9 : break;
838 : case PAC_TYPE_PAC_OPAQUE:
839 9 : wpa_hexdump(MSG_DEBUG, "EAP-FAST: PAC-Opaque", pos, len);
840 9 : entry->pac_opaque = pos;
841 9 : entry->pac_opaque_len = len;
842 9 : break;
843 : case PAC_TYPE_PAC_INFO:
844 9 : wpa_hexdump(MSG_DEBUG, "EAP-FAST: PAC-Info", pos, len);
845 9 : entry->pac_info = pos;
846 9 : entry->pac_info_len = len;
847 9 : break;
848 : default:
849 0 : wpa_printf(MSG_DEBUG, "EAP-FAST: Ignored unknown PAC type %d",
850 : type);
851 0 : break;
852 : }
853 27 : }
854 :
855 :
856 9 : static int eap_fast_process_pac_tlv(struct eap_fast_pac *entry,
857 : u8 *pac, size_t pac_len)
858 : {
859 : struct pac_tlv_hdr *hdr;
860 : u8 *pos;
861 : size_t left, len;
862 9 : int type, pac_key_found = 0;
863 :
864 9 : pos = pac;
865 9 : left = pac_len;
866 :
867 45 : while (left > sizeof(*hdr)) {
868 27 : hdr = (struct pac_tlv_hdr *) pos;
869 27 : type = be_to_host16(hdr->type);
870 27 : len = be_to_host16(hdr->len);
871 27 : pos += sizeof(*hdr);
872 27 : left -= sizeof(*hdr);
873 27 : if (len > left) {
874 0 : wpa_printf(MSG_DEBUG, "EAP-FAST: PAC TLV overrun "
875 : "(type=%d len=%lu left=%lu)",
876 : type, (unsigned long) len,
877 : (unsigned long) left);
878 0 : return -1;
879 : }
880 :
881 27 : eap_fast_parse_pac_tlv(entry, type, pos, len, &pac_key_found);
882 :
883 27 : pos += len;
884 27 : left -= len;
885 : }
886 :
887 9 : if (!pac_key_found || !entry->pac_opaque || !entry->pac_info) {
888 0 : wpa_printf(MSG_DEBUG, "EAP-FAST: PAC TLV does not include "
889 : "all the required fields");
890 0 : return -1;
891 : }
892 :
893 9 : return 0;
894 : }
895 :
896 :
897 45 : static int eap_fast_parse_pac_info(struct eap_fast_pac *entry, int type,
898 : u8 *pos, size_t len)
899 : {
900 : u16 pac_type;
901 : u32 lifetime;
902 : struct os_time now;
903 :
904 45 : switch (type & 0x7fff) {
905 : case PAC_TYPE_CRED_LIFETIME:
906 9 : if (len != 4) {
907 0 : wpa_hexdump(MSG_DEBUG, "EAP-FAST: PAC-Info - "
908 : "Invalid CRED_LIFETIME length - ignored",
909 : pos, len);
910 0 : return 0;
911 : }
912 :
913 : /*
914 : * This is not currently saved separately in PAC files since
915 : * the server can automatically initiate PAC update when
916 : * needed. Anyway, the information is available from PAC-Info
917 : * dump if it is needed for something in the future.
918 : */
919 9 : lifetime = WPA_GET_BE32(pos);
920 9 : os_get_time(&now);
921 9 : wpa_printf(MSG_DEBUG, "EAP-FAST: PAC-Info - CRED_LIFETIME %d "
922 : "(%d days)",
923 9 : lifetime, (lifetime - (u32) now.sec) / 86400);
924 9 : break;
925 : case PAC_TYPE_A_ID:
926 9 : wpa_hexdump_ascii(MSG_DEBUG, "EAP-FAST: PAC-Info - A-ID",
927 : pos, len);
928 9 : entry->a_id = pos;
929 9 : entry->a_id_len = len;
930 9 : break;
931 : case PAC_TYPE_I_ID:
932 9 : wpa_hexdump_ascii(MSG_DEBUG, "EAP-FAST: PAC-Info - I-ID",
933 : pos, len);
934 9 : entry->i_id = pos;
935 9 : entry->i_id_len = len;
936 9 : break;
937 : case PAC_TYPE_A_ID_INFO:
938 9 : wpa_hexdump_ascii(MSG_DEBUG, "EAP-FAST: PAC-Info - A-ID-Info",
939 : pos, len);
940 9 : entry->a_id_info = pos;
941 9 : entry->a_id_info_len = len;
942 9 : break;
943 : case PAC_TYPE_PAC_TYPE:
944 : /* RFC 5422, Section 4.2.6 - PAC-Type TLV */
945 9 : if (len != 2) {
946 0 : wpa_printf(MSG_INFO, "EAP-FAST: Invalid PAC-Type "
947 : "length %lu (expected 2)",
948 : (unsigned long) len);
949 0 : wpa_hexdump_ascii(MSG_DEBUG,
950 : "EAP-FAST: PAC-Info - PAC-Type",
951 : pos, len);
952 0 : return -1;
953 : }
954 9 : pac_type = WPA_GET_BE16(pos);
955 9 : if (pac_type != PAC_TYPE_TUNNEL_PAC &&
956 0 : pac_type != PAC_TYPE_USER_AUTHORIZATION &&
957 : pac_type != PAC_TYPE_MACHINE_AUTHENTICATION) {
958 0 : wpa_printf(MSG_INFO, "EAP-FAST: Unsupported PAC Type "
959 : "%d", pac_type);
960 0 : return -1;
961 : }
962 :
963 9 : wpa_printf(MSG_DEBUG, "EAP-FAST: PAC-Info - PAC-Type %d",
964 : pac_type);
965 9 : entry->pac_type = pac_type;
966 9 : break;
967 : default:
968 0 : wpa_printf(MSG_DEBUG, "EAP-FAST: Ignored unknown PAC-Info "
969 : "type %d", type);
970 0 : break;
971 : }
972 :
973 45 : return 0;
974 : }
975 :
976 :
977 9 : static int eap_fast_process_pac_info(struct eap_fast_pac *entry)
978 : {
979 : struct pac_tlv_hdr *hdr;
980 : u8 *pos;
981 : size_t left, len;
982 : int type;
983 :
984 : /* RFC 5422, Section 4.2.4 */
985 :
986 : /* PAC-Type defaults to Tunnel PAC (Type 1) */
987 9 : entry->pac_type = PAC_TYPE_TUNNEL_PAC;
988 :
989 9 : pos = entry->pac_info;
990 9 : left = entry->pac_info_len;
991 63 : while (left > sizeof(*hdr)) {
992 45 : hdr = (struct pac_tlv_hdr *) pos;
993 45 : type = be_to_host16(hdr->type);
994 45 : len = be_to_host16(hdr->len);
995 45 : pos += sizeof(*hdr);
996 45 : left -= sizeof(*hdr);
997 45 : if (len > left) {
998 0 : wpa_printf(MSG_DEBUG, "EAP-FAST: PAC-Info overrun "
999 : "(type=%d len=%lu left=%lu)",
1000 : type, (unsigned long) len,
1001 : (unsigned long) left);
1002 0 : return -1;
1003 : }
1004 :
1005 45 : if (eap_fast_parse_pac_info(entry, type, pos, len) < 0)
1006 0 : return -1;
1007 :
1008 45 : pos += len;
1009 45 : left -= len;
1010 : }
1011 :
1012 9 : if (entry->a_id == NULL || entry->a_id_info == NULL) {
1013 0 : wpa_printf(MSG_DEBUG, "EAP-FAST: PAC-Info does not include "
1014 : "all the required fields");
1015 0 : return -1;
1016 : }
1017 :
1018 9 : return 0;
1019 : }
1020 :
1021 :
1022 9 : static struct wpabuf * eap_fast_process_pac(struct eap_sm *sm,
1023 : struct eap_fast_data *data,
1024 : struct eap_method_ret *ret,
1025 : u8 *pac, size_t pac_len)
1026 : {
1027 9 : struct eap_peer_config *config = eap_get_config(sm);
1028 : struct eap_fast_pac entry;
1029 :
1030 9 : os_memset(&entry, 0, sizeof(entry));
1031 18 : if (eap_fast_process_pac_tlv(&entry, pac, pac_len) ||
1032 9 : eap_fast_process_pac_info(&entry))
1033 0 : return NULL;
1034 :
1035 9 : eap_fast_add_pac(&data->pac, &data->current_pac, &entry);
1036 9 : eap_fast_pac_list_truncate(data->pac, data->max_pac_list_len);
1037 9 : if (data->use_pac_binary_format)
1038 2 : eap_fast_save_pac_bin(sm, data->pac, config->pac_file);
1039 : else
1040 7 : eap_fast_save_pac(sm, data->pac, config->pac_file);
1041 :
1042 9 : if (data->provisioning) {
1043 9 : if (data->anon_provisioning) {
1044 : /*
1045 : * Unauthenticated provisioning does not provide keying
1046 : * material and must end with an EAP-Failure.
1047 : * Authentication will be done separately after this.
1048 : */
1049 4 : data->success = 0;
1050 4 : ret->decision = DECISION_FAIL;
1051 : } else {
1052 : /*
1053 : * Server may or may not allow authenticated
1054 : * provisioning also for key generation.
1055 : */
1056 5 : ret->decision = DECISION_COND_SUCC;
1057 : }
1058 9 : wpa_printf(MSG_DEBUG, "EAP-FAST: Send PAC-Acknowledgement TLV "
1059 : "- Provisioning completed successfully");
1060 9 : sm->expected_failure = 1;
1061 : } else {
1062 : /*
1063 : * This is PAC refreshing, i.e., normal authentication that is
1064 : * expected to be completed with an EAP-Success. However,
1065 : * RFC 5422, Section 3.5 allows EAP-Failure to be sent even
1066 : * after protected success exchange in case of EAP-Fast
1067 : * provisioning, so we better use DECISION_COND_SUCC here
1068 : * instead of DECISION_UNCOND_SUCC.
1069 : */
1070 0 : wpa_printf(MSG_DEBUG, "EAP-FAST: Send PAC-Acknowledgement TLV "
1071 : "- PAC refreshing completed successfully");
1072 0 : ret->decision = DECISION_COND_SUCC;
1073 : }
1074 9 : ret->methodState = METHOD_DONE;
1075 9 : return eap_fast_tlv_pac_ack();
1076 : }
1077 :
1078 :
1079 75 : static int eap_fast_parse_decrypted(struct wpabuf *decrypted,
1080 : struct eap_fast_tlv_parse *tlv,
1081 : struct wpabuf **resp)
1082 : {
1083 : int mandatory, tlv_type, len, res;
1084 : u8 *pos, *end;
1085 :
1086 75 : os_memset(tlv, 0, sizeof(*tlv));
1087 :
1088 : /* Parse TLVs from the decrypted Phase 2 data */
1089 75 : pos = wpabuf_mhead(decrypted);
1090 75 : end = pos + wpabuf_len(decrypted);
1091 255 : while (pos + 4 < end) {
1092 105 : mandatory = pos[0] & 0x80;
1093 105 : tlv_type = WPA_GET_BE16(pos) & 0x3fff;
1094 105 : pos += 2;
1095 105 : len = WPA_GET_BE16(pos);
1096 105 : pos += 2;
1097 105 : if (pos + len > end) {
1098 0 : wpa_printf(MSG_INFO, "EAP-FAST: TLV overflow");
1099 0 : return -1;
1100 : }
1101 105 : wpa_printf(MSG_DEBUG, "EAP-FAST: Received Phase 2: "
1102 : "TLV type %d length %d%s",
1103 : tlv_type, len, mandatory ? " (mandatory)" : "");
1104 :
1105 105 : res = eap_fast_parse_tlv(tlv, tlv_type, pos, len);
1106 105 : if (res == -2)
1107 0 : break;
1108 105 : if (res < 0) {
1109 0 : if (mandatory) {
1110 0 : wpa_printf(MSG_DEBUG, "EAP-FAST: Nak unknown "
1111 : "mandatory TLV type %d", tlv_type);
1112 0 : *resp = eap_fast_tlv_nak(0, tlv_type);
1113 0 : break;
1114 : } else {
1115 0 : wpa_printf(MSG_DEBUG, "EAP-FAST: ignored "
1116 : "unknown optional TLV type %d",
1117 : tlv_type);
1118 : }
1119 : }
1120 :
1121 105 : pos += len;
1122 : }
1123 :
1124 75 : return 0;
1125 : }
1126 :
1127 :
1128 75 : static int eap_fast_encrypt_response(struct eap_sm *sm,
1129 : struct eap_fast_data *data,
1130 : struct wpabuf *resp,
1131 : u8 identifier, struct wpabuf **out_data)
1132 : {
1133 75 : if (resp == NULL)
1134 0 : return 0;
1135 :
1136 75 : wpa_hexdump_buf(MSG_DEBUG, "EAP-FAST: Encrypting Phase 2 data",
1137 : resp);
1138 75 : if (eap_peer_tls_encrypt(sm, &data->ssl, EAP_TYPE_FAST,
1139 : data->fast_version, identifier,
1140 : resp, out_data)) {
1141 0 : wpa_printf(MSG_INFO, "EAP-FAST: Failed to encrypt a Phase 2 "
1142 : "frame");
1143 : }
1144 75 : wpabuf_free(resp);
1145 :
1146 75 : return 0;
1147 : }
1148 :
1149 :
1150 6 : static struct wpabuf * eap_fast_pac_request(void)
1151 : {
1152 : struct wpabuf *tmp;
1153 : u8 *pos, *pos2;
1154 :
1155 6 : tmp = wpabuf_alloc(sizeof(struct eap_tlv_hdr) +
1156 : sizeof(struct eap_tlv_request_action_tlv) +
1157 : sizeof(struct eap_tlv_pac_type_tlv));
1158 6 : if (tmp == NULL)
1159 0 : return NULL;
1160 :
1161 6 : pos = wpabuf_put(tmp, 0);
1162 6 : pos2 = eap_fast_write_pac_request(pos, PAC_TYPE_TUNNEL_PAC);
1163 6 : wpabuf_put(tmp, pos2 - pos);
1164 6 : return tmp;
1165 : }
1166 :
1167 :
1168 75 : static int eap_fast_process_decrypted(struct eap_sm *sm,
1169 : struct eap_fast_data *data,
1170 : struct eap_method_ret *ret,
1171 : const struct eap_hdr *req,
1172 : struct wpabuf *decrypted,
1173 : struct wpabuf **out_data)
1174 : {
1175 75 : struct wpabuf *resp = NULL, *tmp;
1176 : struct eap_fast_tlv_parse tlv;
1177 75 : int failed = 0;
1178 :
1179 75 : if (eap_fast_parse_decrypted(decrypted, &tlv, &resp) < 0)
1180 0 : return 0;
1181 75 : if (resp)
1182 0 : return eap_fast_encrypt_response(sm, data, resp,
1183 0 : req->identifier, out_data);
1184 :
1185 75 : if (tlv.result == EAP_TLV_RESULT_FAILURE) {
1186 0 : resp = eap_fast_tlv_result(EAP_TLV_RESULT_FAILURE, 0);
1187 0 : return eap_fast_encrypt_response(sm, data, resp,
1188 0 : req->identifier, out_data);
1189 : }
1190 :
1191 75 : if (tlv.iresult == EAP_TLV_RESULT_FAILURE) {
1192 0 : resp = eap_fast_tlv_result(EAP_TLV_RESULT_FAILURE, 1);
1193 0 : return eap_fast_encrypt_response(sm, data, resp,
1194 0 : req->identifier, out_data);
1195 : }
1196 :
1197 75 : if (tlv.crypto_binding) {
1198 19 : tmp = eap_fast_process_crypto_binding(sm, data, ret,
1199 : tlv.crypto_binding,
1200 : tlv.crypto_binding_len);
1201 19 : if (tmp == NULL)
1202 0 : failed = 1;
1203 : else
1204 19 : resp = wpabuf_concat(resp, tmp);
1205 : }
1206 :
1207 75 : if (tlv.iresult == EAP_TLV_RESULT_SUCCESS) {
1208 6 : tmp = eap_fast_tlv_result(failed ? EAP_TLV_RESULT_FAILURE :
1209 : EAP_TLV_RESULT_SUCCESS, 1);
1210 6 : resp = wpabuf_concat(resp, tmp);
1211 : }
1212 :
1213 75 : if (tlv.eap_payload_tlv) {
1214 48 : tmp = eap_fast_process_eap_payload_tlv(
1215 : sm, data, ret, tlv.eap_payload_tlv,
1216 : tlv.eap_payload_tlv_len);
1217 48 : resp = wpabuf_concat(resp, tmp);
1218 : }
1219 :
1220 75 : if (tlv.pac && tlv.result != EAP_TLV_RESULT_SUCCESS) {
1221 0 : wpa_printf(MSG_DEBUG, "EAP-FAST: PAC TLV without Result TLV "
1222 : "acknowledging success");
1223 0 : failed = 1;
1224 75 : } else if (tlv.pac && tlv.result == EAP_TLV_RESULT_SUCCESS) {
1225 9 : tmp = eap_fast_process_pac(sm, data, ret, tlv.pac,
1226 : tlv.pac_len);
1227 9 : resp = wpabuf_concat(resp, tmp);
1228 : }
1229 :
1230 123 : if (data->current_pac == NULL && data->provisioning &&
1231 99 : !data->anon_provisioning && !tlv.pac &&
1232 44 : (tlv.iresult == EAP_TLV_RESULT_SUCCESS ||
1233 21 : tlv.result == EAP_TLV_RESULT_SUCCESS)) {
1234 : /*
1235 : * Need to request Tunnel PAC when using authenticated
1236 : * provisioning.
1237 : */
1238 6 : wpa_printf(MSG_DEBUG, "EAP-FAST: Request Tunnel PAC");
1239 6 : tmp = eap_fast_pac_request();
1240 6 : resp = wpabuf_concat(resp, tmp);
1241 : }
1242 :
1243 75 : if (tlv.result == EAP_TLV_RESULT_SUCCESS && !failed) {
1244 23 : tmp = eap_fast_tlv_result(EAP_TLV_RESULT_SUCCESS, 0);
1245 23 : resp = wpabuf_concat(tmp, resp);
1246 52 : } else if (failed) {
1247 0 : tmp = eap_fast_tlv_result(EAP_TLV_RESULT_FAILURE, 0);
1248 0 : resp = wpabuf_concat(tmp, resp);
1249 : }
1250 :
1251 98 : if (resp && tlv.result == EAP_TLV_RESULT_SUCCESS && !failed &&
1252 37 : tlv.crypto_binding && data->phase2_success) {
1253 14 : if (data->anon_provisioning) {
1254 0 : wpa_printf(MSG_DEBUG, "EAP-FAST: Unauthenticated "
1255 : "provisioning completed successfully.");
1256 0 : ret->methodState = METHOD_DONE;
1257 0 : ret->decision = DECISION_FAIL;
1258 0 : sm->expected_failure = 1;
1259 : } else {
1260 14 : wpa_printf(MSG_DEBUG, "EAP-FAST: Authentication "
1261 : "completed successfully.");
1262 14 : if (data->provisioning)
1263 5 : ret->methodState = METHOD_MAY_CONT;
1264 : else
1265 9 : ret->methodState = METHOD_DONE;
1266 14 : ret->decision = DECISION_UNCOND_SUCC;
1267 : }
1268 : }
1269 :
1270 75 : if (resp == NULL) {
1271 0 : wpa_printf(MSG_DEBUG, "EAP-FAST: No recognized TLVs - send "
1272 : "empty response packet");
1273 0 : resp = wpabuf_alloc(1);
1274 : }
1275 :
1276 75 : return eap_fast_encrypt_response(sm, data, resp, req->identifier,
1277 : out_data);
1278 : }
1279 :
1280 :
1281 75 : static int eap_fast_decrypt(struct eap_sm *sm, struct eap_fast_data *data,
1282 : struct eap_method_ret *ret,
1283 : const struct eap_hdr *req,
1284 : const struct wpabuf *in_data,
1285 : struct wpabuf **out_data)
1286 : {
1287 : struct wpabuf *in_decrypted;
1288 : int res;
1289 :
1290 75 : wpa_printf(MSG_DEBUG, "EAP-FAST: Received %lu bytes encrypted data for"
1291 : " Phase 2", (unsigned long) wpabuf_len(in_data));
1292 :
1293 75 : if (data->pending_phase2_req) {
1294 9 : wpa_printf(MSG_DEBUG, "EAP-FAST: Pending Phase 2 request - "
1295 : "skip decryption and use old data");
1296 : /* Clear TLS reassembly state. */
1297 9 : eap_peer_tls_reset_input(&data->ssl);
1298 :
1299 9 : in_decrypted = data->pending_phase2_req;
1300 9 : data->pending_phase2_req = NULL;
1301 9 : goto continue_req;
1302 : }
1303 :
1304 66 : if (wpabuf_len(in_data) == 0) {
1305 : /* Received TLS ACK - requesting more fragments */
1306 0 : return eap_peer_tls_encrypt(sm, &data->ssl, EAP_TYPE_FAST,
1307 : data->fast_version,
1308 0 : req->identifier, NULL, out_data);
1309 : }
1310 :
1311 66 : res = eap_peer_tls_decrypt(sm, &data->ssl, in_data, &in_decrypted);
1312 66 : if (res)
1313 0 : return res;
1314 :
1315 : continue_req:
1316 75 : wpa_hexdump_buf(MSG_MSGDUMP, "EAP-FAST: Decrypted Phase 2 TLV(s)",
1317 : in_decrypted);
1318 :
1319 75 : if (wpabuf_len(in_decrypted) < 4) {
1320 0 : wpa_printf(MSG_INFO, "EAP-FAST: Too short Phase 2 "
1321 : "TLV frame (len=%lu)",
1322 : (unsigned long) wpabuf_len(in_decrypted));
1323 0 : wpabuf_free(in_decrypted);
1324 0 : return -1;
1325 : }
1326 :
1327 75 : res = eap_fast_process_decrypted(sm, data, ret, req,
1328 : in_decrypted, out_data);
1329 :
1330 75 : wpabuf_free(in_decrypted);
1331 :
1332 75 : return res;
1333 : }
1334 :
1335 :
1336 18 : static const u8 * eap_fast_get_a_id(const u8 *buf, size_t len, size_t *id_len)
1337 : {
1338 : const u8 *a_id;
1339 : struct pac_tlv_hdr *hdr;
1340 :
1341 : /*
1342 : * Parse authority identity (A-ID) from the EAP-FAST/Start. This
1343 : * supports both raw A-ID and one inside an A-ID TLV.
1344 : */
1345 18 : a_id = buf;
1346 18 : *id_len = len;
1347 18 : if (len > sizeof(*hdr)) {
1348 : int tlen;
1349 18 : hdr = (struct pac_tlv_hdr *) buf;
1350 18 : tlen = be_to_host16(hdr->len);
1351 36 : if (be_to_host16(hdr->type) == PAC_TYPE_A_ID &&
1352 18 : sizeof(*hdr) + tlen <= len) {
1353 18 : wpa_printf(MSG_DEBUG, "EAP-FAST: A-ID was in TLV "
1354 : "(Start)");
1355 18 : a_id = (u8 *) (hdr + 1);
1356 18 : *id_len = tlen;
1357 : }
1358 : }
1359 18 : wpa_hexdump_ascii(MSG_DEBUG, "EAP-FAST: A-ID", a_id, *id_len);
1360 :
1361 18 : return a_id;
1362 : }
1363 :
1364 :
1365 18 : static void eap_fast_select_pac(struct eap_fast_data *data,
1366 : const u8 *a_id, size_t a_id_len)
1367 : {
1368 18 : data->current_pac = eap_fast_get_pac(data->pac, a_id, a_id_len,
1369 : PAC_TYPE_TUNNEL_PAC);
1370 18 : if (data->current_pac == NULL) {
1371 : /*
1372 : * Tunnel PAC was not available for this A-ID. Try to use
1373 : * Machine Authentication PAC, if one is available.
1374 : */
1375 9 : data->current_pac = eap_fast_get_pac(
1376 : data->pac, a_id, a_id_len,
1377 : PAC_TYPE_MACHINE_AUTHENTICATION);
1378 : }
1379 :
1380 18 : if (data->current_pac) {
1381 9 : wpa_printf(MSG_DEBUG, "EAP-FAST: PAC found for this A-ID "
1382 9 : "(PAC-Type %d)", data->current_pac->pac_type);
1383 18 : wpa_hexdump_ascii(MSG_MSGDUMP, "EAP-FAST: A-ID-Info",
1384 9 : data->current_pac->a_id_info,
1385 9 : data->current_pac->a_id_info_len);
1386 : }
1387 18 : }
1388 :
1389 :
1390 9 : static int eap_fast_use_pac_opaque(struct eap_sm *sm,
1391 : struct eap_fast_data *data,
1392 : struct eap_fast_pac *pac)
1393 : {
1394 : u8 *tlv;
1395 : size_t tlv_len, olen;
1396 : struct eap_tlv_hdr *ehdr;
1397 :
1398 9 : olen = pac->pac_opaque_len;
1399 9 : tlv_len = sizeof(*ehdr) + olen;
1400 9 : tlv = os_malloc(tlv_len);
1401 9 : if (tlv) {
1402 9 : ehdr = (struct eap_tlv_hdr *) tlv;
1403 9 : ehdr->tlv_type = host_to_be16(PAC_TYPE_PAC_OPAQUE);
1404 9 : ehdr->length = host_to_be16(olen);
1405 9 : os_memcpy(ehdr + 1, pac->pac_opaque, olen);
1406 : }
1407 18 : if (tlv == NULL ||
1408 9 : tls_connection_client_hello_ext(sm->ssl_ctx, data->ssl.conn,
1409 : TLS_EXT_PAC_OPAQUE,
1410 : tlv, tlv_len) < 0) {
1411 0 : wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to add PAC-Opaque TLS "
1412 : "extension");
1413 0 : os_free(tlv);
1414 0 : return -1;
1415 : }
1416 9 : os_free(tlv);
1417 :
1418 9 : return 0;
1419 : }
1420 :
1421 :
1422 9 : static int eap_fast_clear_pac_opaque_ext(struct eap_sm *sm,
1423 : struct eap_fast_data *data)
1424 : {
1425 9 : if (tls_connection_client_hello_ext(sm->ssl_ctx, data->ssl.conn,
1426 : TLS_EXT_PAC_OPAQUE, NULL, 0) < 0) {
1427 0 : wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to remove PAC-Opaque "
1428 : "TLS extension");
1429 0 : return -1;
1430 : }
1431 9 : return 0;
1432 : }
1433 :
1434 :
1435 9 : static int eap_fast_set_provisioning_ciphers(struct eap_sm *sm,
1436 : struct eap_fast_data *data)
1437 : {
1438 : u8 ciphers[5];
1439 9 : int count = 0;
1440 :
1441 9 : if (data->provisioning_allowed & EAP_FAST_PROV_UNAUTH) {
1442 4 : wpa_printf(MSG_DEBUG, "EAP-FAST: Enabling unauthenticated "
1443 : "provisioning TLS cipher suites");
1444 4 : ciphers[count++] = TLS_CIPHER_ANON_DH_AES128_SHA;
1445 : }
1446 :
1447 9 : if (data->provisioning_allowed & EAP_FAST_PROV_AUTH) {
1448 5 : wpa_printf(MSG_DEBUG, "EAP-FAST: Enabling authenticated "
1449 : "provisioning TLS cipher suites");
1450 5 : ciphers[count++] = TLS_CIPHER_RSA_DHE_AES128_SHA;
1451 5 : ciphers[count++] = TLS_CIPHER_AES128_SHA;
1452 5 : ciphers[count++] = TLS_CIPHER_RC4_SHA;
1453 : }
1454 :
1455 9 : ciphers[count++] = TLS_CIPHER_NONE;
1456 :
1457 9 : if (tls_connection_set_cipher_list(sm->ssl_ctx, data->ssl.conn,
1458 : ciphers)) {
1459 0 : wpa_printf(MSG_INFO, "EAP-FAST: Could not configure TLS "
1460 : "cipher suites for provisioning");
1461 0 : return -1;
1462 : }
1463 :
1464 9 : return 0;
1465 : }
1466 :
1467 :
1468 18 : static int eap_fast_process_start(struct eap_sm *sm,
1469 : struct eap_fast_data *data, u8 flags,
1470 : const u8 *pos, size_t left)
1471 : {
1472 : const u8 *a_id;
1473 : size_t a_id_len;
1474 :
1475 : /* EAP-FAST Version negotiation (section 3.1) */
1476 18 : wpa_printf(MSG_DEBUG, "EAP-FAST: Start (server ver=%d, own ver=%d)",
1477 : flags & EAP_TLS_VERSION_MASK, data->fast_version);
1478 18 : if ((flags & EAP_TLS_VERSION_MASK) < data->fast_version)
1479 0 : data->fast_version = flags & EAP_TLS_VERSION_MASK;
1480 18 : wpa_printf(MSG_DEBUG, "EAP-FAST: Using FAST version %d",
1481 : data->fast_version);
1482 :
1483 18 : a_id = eap_fast_get_a_id(pos, left, &a_id_len);
1484 18 : eap_fast_select_pac(data, a_id, a_id_len);
1485 :
1486 18 : if (data->resuming && data->current_pac) {
1487 0 : wpa_printf(MSG_DEBUG, "EAP-FAST: Trying to resume session - "
1488 : "do not add PAC-Opaque to TLS ClientHello");
1489 0 : if (eap_fast_clear_pac_opaque_ext(sm, data) < 0)
1490 0 : return -1;
1491 18 : } else if (data->current_pac) {
1492 : /*
1493 : * PAC found for the A-ID and we are not resuming an old
1494 : * session, so add PAC-Opaque extension to ClientHello.
1495 : */
1496 9 : if (eap_fast_use_pac_opaque(sm, data, data->current_pac) < 0)
1497 0 : return -1;
1498 : } else {
1499 : /* No PAC found, so we must provision one. */
1500 9 : if (!data->provisioning_allowed) {
1501 0 : wpa_printf(MSG_DEBUG, "EAP-FAST: No PAC found and "
1502 : "provisioning disabled");
1503 0 : return -1;
1504 : }
1505 9 : wpa_printf(MSG_DEBUG, "EAP-FAST: No PAC found - "
1506 : "starting provisioning");
1507 18 : if (eap_fast_set_provisioning_ciphers(sm, data) < 0 ||
1508 9 : eap_fast_clear_pac_opaque_ext(sm, data) < 0)
1509 0 : return -1;
1510 9 : data->provisioning = 1;
1511 : }
1512 :
1513 18 : return 0;
1514 : }
1515 :
1516 :
1517 115 : static struct wpabuf * eap_fast_process(struct eap_sm *sm, void *priv,
1518 : struct eap_method_ret *ret,
1519 : const struct wpabuf *reqData)
1520 : {
1521 : const struct eap_hdr *req;
1522 : size_t left;
1523 : int res;
1524 : u8 flags, id;
1525 : struct wpabuf *resp;
1526 : const u8 *pos;
1527 115 : struct eap_fast_data *data = priv;
1528 :
1529 115 : pos = eap_peer_tls_process_init(sm, &data->ssl, EAP_TYPE_FAST, ret,
1530 : reqData, &left, &flags);
1531 115 : if (pos == NULL)
1532 0 : return NULL;
1533 :
1534 115 : req = wpabuf_head(reqData);
1535 115 : id = req->identifier;
1536 :
1537 115 : if (flags & EAP_TLS_FLAGS_START) {
1538 18 : if (eap_fast_process_start(sm, data, flags, pos, left) < 0)
1539 0 : return NULL;
1540 :
1541 18 : left = 0; /* A-ID is not used in further packet processing */
1542 : }
1543 :
1544 115 : resp = NULL;
1545 181 : if (tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
1546 132 : !data->resuming) {
1547 : /* Process tunneled (encrypted) phase 2 data. */
1548 : struct wpabuf msg;
1549 66 : wpabuf_set(&msg, pos, left);
1550 66 : res = eap_fast_decrypt(sm, data, ret, req, &msg, &resp);
1551 66 : if (res < 0) {
1552 0 : ret->methodState = METHOD_DONE;
1553 0 : ret->decision = DECISION_FAIL;
1554 : /*
1555 : * Ack possible Alert that may have caused failure in
1556 : * decryption.
1557 : */
1558 0 : res = 1;
1559 : }
1560 : } else {
1561 : /* Continue processing TLS handshake (phase 1). */
1562 49 : res = eap_peer_tls_process_helper(sm, &data->ssl,
1563 : EAP_TYPE_FAST,
1564 : data->fast_version, id, pos,
1565 : left, &resp);
1566 :
1567 49 : if (tls_connection_established(sm->ssl_ctx, data->ssl.conn)) {
1568 : char cipher[80];
1569 18 : wpa_printf(MSG_DEBUG,
1570 : "EAP-FAST: TLS done, proceed to Phase 2");
1571 27 : if (data->provisioning &&
1572 9 : (!(data->provisioning_allowed &
1573 5 : EAP_FAST_PROV_AUTH) ||
1574 5 : tls_get_cipher(sm->ssl_ctx, data->ssl.conn,
1575 5 : cipher, sizeof(cipher)) < 0 ||
1576 10 : os_strstr(cipher, "ADH-") ||
1577 5 : os_strstr(cipher, "anon"))) {
1578 4 : wpa_printf(MSG_DEBUG, "EAP-FAST: Using "
1579 : "anonymous (unauthenticated) "
1580 : "provisioning");
1581 4 : data->anon_provisioning = 1;
1582 : } else
1583 14 : data->anon_provisioning = 0;
1584 18 : data->resuming = 0;
1585 18 : eap_fast_derive_keys(sm, data);
1586 : }
1587 :
1588 49 : if (res == 2) {
1589 : struct wpabuf msg;
1590 : /*
1591 : * Application data included in the handshake message.
1592 : */
1593 9 : wpabuf_free(data->pending_phase2_req);
1594 9 : data->pending_phase2_req = resp;
1595 9 : resp = NULL;
1596 9 : wpabuf_set(&msg, pos, left);
1597 9 : res = eap_fast_decrypt(sm, data, ret, req, &msg,
1598 : &resp);
1599 : }
1600 : }
1601 :
1602 115 : if (res == 1) {
1603 4 : wpabuf_free(resp);
1604 4 : return eap_peer_tls_build_ack(id, EAP_TYPE_FAST,
1605 : data->fast_version);
1606 : }
1607 :
1608 111 : return resp;
1609 : }
1610 :
1611 :
1612 : #if 0 /* FIX */
1613 : static Boolean eap_fast_has_reauth_data(struct eap_sm *sm, void *priv)
1614 : {
1615 : struct eap_fast_data *data = priv;
1616 : return tls_connection_established(sm->ssl_ctx, data->ssl.conn);
1617 : }
1618 :
1619 :
1620 : static void eap_fast_deinit_for_reauth(struct eap_sm *sm, void *priv)
1621 : {
1622 : struct eap_fast_data *data = priv;
1623 : os_free(data->key_block_p);
1624 : data->key_block_p = NULL;
1625 : wpabuf_free(data->pending_phase2_req);
1626 : data->pending_phase2_req = NULL;
1627 : }
1628 :
1629 :
1630 : static void * eap_fast_init_for_reauth(struct eap_sm *sm, void *priv)
1631 : {
1632 : struct eap_fast_data *data = priv;
1633 : if (eap_peer_tls_reauth_init(sm, &data->ssl)) {
1634 : os_free(data);
1635 : return NULL;
1636 : }
1637 : os_free(data->session_id);
1638 : data->session_id = NULL;
1639 : if (data->phase2_priv && data->phase2_method &&
1640 : data->phase2_method->init_for_reauth)
1641 : data->phase2_method->init_for_reauth(sm, data->phase2_priv);
1642 : data->phase2_success = 0;
1643 : data->resuming = 1;
1644 : data->provisioning = 0;
1645 : data->anon_provisioning = 0;
1646 : data->simck_idx = 0;
1647 : return priv;
1648 : }
1649 : #endif
1650 :
1651 :
1652 11 : static int eap_fast_get_status(struct eap_sm *sm, void *priv, char *buf,
1653 : size_t buflen, int verbose)
1654 : {
1655 11 : struct eap_fast_data *data = priv;
1656 : int len, ret;
1657 :
1658 11 : len = eap_peer_tls_status(sm, &data->ssl, buf, buflen, verbose);
1659 11 : if (data->phase2_method) {
1660 11 : ret = os_snprintf(buf + len, buflen - len,
1661 : "EAP-FAST Phase2 method=%s\n",
1662 11 : data->phase2_method->name);
1663 11 : if (ret < 0 || (size_t) ret >= buflen - len)
1664 0 : return len;
1665 11 : len += ret;
1666 : }
1667 11 : return len;
1668 : }
1669 :
1670 :
1671 115 : static Boolean eap_fast_isKeyAvailable(struct eap_sm *sm, void *priv)
1672 : {
1673 115 : struct eap_fast_data *data = priv;
1674 115 : return data->success;
1675 : }
1676 :
1677 :
1678 22 : static u8 * eap_fast_getKey(struct eap_sm *sm, void *priv, size_t *len)
1679 : {
1680 22 : struct eap_fast_data *data = priv;
1681 : u8 *key;
1682 :
1683 22 : if (!data->success)
1684 0 : return NULL;
1685 :
1686 22 : key = os_malloc(EAP_FAST_KEY_LEN);
1687 22 : if (key == NULL)
1688 0 : return NULL;
1689 :
1690 22 : *len = EAP_FAST_KEY_LEN;
1691 22 : os_memcpy(key, data->key_data, EAP_FAST_KEY_LEN);
1692 :
1693 22 : return key;
1694 : }
1695 :
1696 :
1697 22 : static u8 * eap_fast_get_session_id(struct eap_sm *sm, void *priv, size_t *len)
1698 : {
1699 22 : struct eap_fast_data *data = priv;
1700 : u8 *id;
1701 :
1702 22 : if (!data->success)
1703 0 : return NULL;
1704 :
1705 22 : id = os_malloc(data->id_len);
1706 22 : if (id == NULL)
1707 0 : return NULL;
1708 :
1709 22 : *len = data->id_len;
1710 22 : os_memcpy(id, data->session_id, data->id_len);
1711 :
1712 22 : return id;
1713 : }
1714 :
1715 :
1716 0 : static u8 * eap_fast_get_emsk(struct eap_sm *sm, void *priv, size_t *len)
1717 : {
1718 0 : struct eap_fast_data *data = priv;
1719 : u8 *key;
1720 :
1721 0 : if (!data->success)
1722 0 : return NULL;
1723 :
1724 0 : key = os_malloc(EAP_EMSK_LEN);
1725 0 : if (key == NULL)
1726 0 : return NULL;
1727 :
1728 0 : *len = EAP_EMSK_LEN;
1729 0 : os_memcpy(key, data->emsk, EAP_EMSK_LEN);
1730 :
1731 0 : return key;
1732 : }
1733 :
1734 :
1735 4 : int eap_peer_fast_register(void)
1736 : {
1737 : struct eap_method *eap;
1738 : int ret;
1739 :
1740 4 : eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
1741 : EAP_VENDOR_IETF, EAP_TYPE_FAST, "FAST");
1742 4 : if (eap == NULL)
1743 0 : return -1;
1744 :
1745 4 : eap->init = eap_fast_init;
1746 4 : eap->deinit = eap_fast_deinit;
1747 4 : eap->process = eap_fast_process;
1748 4 : eap->isKeyAvailable = eap_fast_isKeyAvailable;
1749 4 : eap->getKey = eap_fast_getKey;
1750 4 : eap->getSessionId = eap_fast_get_session_id;
1751 4 : eap->get_status = eap_fast_get_status;
1752 : #if 0
1753 : eap->has_reauth_data = eap_fast_has_reauth_data;
1754 : eap->deinit_for_reauth = eap_fast_deinit_for_reauth;
1755 : eap->init_for_reauth = eap_fast_init_for_reauth;
1756 : #endif
1757 4 : eap->get_emsk = eap_fast_get_emsk;
1758 :
1759 4 : ret = eap_peer_method_register(eap);
1760 4 : if (ret)
1761 0 : eap_peer_method_free(eap);
1762 4 : return ret;
1763 : }
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