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