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