?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Use common driver code for Linux hwaddr get/set
[hostap-gosc2009.git] / src / eap_peer / eap_ttls.c
blob25737803beeda10ccda70b2775b53f4ce5409beb
1 /*
2 * EAP peer method: EAP-TTLS (RFC 5281)
3 * Copyright (c) 2004-2008, Jouni Malinen <j@w1.fi>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 */
14
15 #include "includes.h"
16
17 #include "common.h"
18 #include "crypto/ms_funcs.h"
19 #include "crypto/sha1.h"
20 #include "crypto/tls.h"
21 #include "eap_common/chap.h"
22 #include "eap_common/eap_ttls.h"
23 #include "mschapv2.h"
24 #include "eap_i.h"
25 #include "eap_tls_common.h"
26 #include "eap_config.h"
27
28
29 /* Maximum supported TTLS version
30 * 0 = RFC 5281
31 * 1 = draft-funk-eap-ttls-v1-00.txt
32 */
33 #ifndef EAP_TTLS_VERSION
34 #define EAP_TTLS_VERSION 0 /* TTLSv1 implementation is not yet complete */
35 #endif /* EAP_TTLS_VERSION */
36
37
38 #define MSCHAPV2_KEY_LEN 16
39 #define MSCHAPV2_NT_RESPONSE_LEN 24
40
41
42 static void eap_ttls_deinit(struct eap_sm *sm, void *priv);
43
44
45 struct eap_ttls_data {
46 struct eap_ssl_data ssl;
47 int ssl_initialized;
48
49 int ttls_version, force_ttls_version;
50
51 const struct eap_method *phase2_method;
52 void *phase2_priv;
53 int phase2_success;
54 int phase2_start;
55
56 enum phase2_types {
57 EAP_TTLS_PHASE2_EAP,
58 EAP_TTLS_PHASE2_MSCHAPV2,
59 EAP_TTLS_PHASE2_MSCHAP,
60 EAP_TTLS_PHASE2_PAP,
61 EAP_TTLS_PHASE2_CHAP
62 } phase2_type;
63 struct eap_method_type phase2_eap_type;
64 struct eap_method_type *phase2_eap_types;
65 size_t num_phase2_eap_types;
66
67 u8 auth_response[MSCHAPV2_AUTH_RESPONSE_LEN];
68 int auth_response_valid;
69 u8 master_key[MSCHAPV2_MASTER_KEY_LEN]; /* MSCHAPv2 master key */
70 u8 ident;
71 int resuming; /* starting a resumed session */
72 int reauth; /* reauthentication */
73 u8 *key_data;
74
75 struct wpabuf *pending_phase2_req;
76
77 #ifdef EAP_TNC
78 int ready_for_tnc;
79 int tnc_started;
80 #endif /* EAP_TNC */
81 };
82
83
84 static void * eap_ttls_init(struct eap_sm *sm)
85 {
86 struct eap_ttls_data *data;
87 struct eap_peer_config *config = eap_get_config(sm);
88 char *selected;
89
90 data = os_zalloc(sizeof(*data));
91 if (data == NULL)
92 return NULL;
93 data->ttls_version = EAP_TTLS_VERSION;
94 data->force_ttls_version = -1;
95 selected = "EAP";
96 data->phase2_type = EAP_TTLS_PHASE2_EAP;
97
98 #if EAP_TTLS_VERSION > 0
99 if (config && config->phase1) {
100 const char *pos = os_strstr(config->phase1, "ttlsver=");
101 if (pos) {
102 data->force_ttls_version = atoi(pos + 8);
103 data->ttls_version = data->force_ttls_version;
104 wpa_printf(MSG_DEBUG, "EAP-TTLS: Forced TTLS version "
105 "%d", data->force_ttls_version);
106 }
107 }
108 #endif /* EAP_TTLS_VERSION */
109
110 if (config && config->phase2) {
111 if (os_strstr(config->phase2, "autheap=")) {
112 selected = "EAP";
113 data->phase2_type = EAP_TTLS_PHASE2_EAP;
114 } else if (os_strstr(config->phase2, "auth=MSCHAPV2")) {
115 selected = "MSCHAPV2";
116 data->phase2_type = EAP_TTLS_PHASE2_MSCHAPV2;
117 } else if (os_strstr(config->phase2, "auth=MSCHAP")) {
118 selected = "MSCHAP";
119 data->phase2_type = EAP_TTLS_PHASE2_MSCHAP;
120 } else if (os_strstr(config->phase2, "auth=PAP")) {
121 selected = "PAP";
122 data->phase2_type = EAP_TTLS_PHASE2_PAP;
123 } else if (os_strstr(config->phase2, "auth=CHAP")) {
124 selected = "CHAP";
125 data->phase2_type = EAP_TTLS_PHASE2_CHAP;
126 }
127 }
128 wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase2 type: %s", selected);
129
130 if (data->phase2_type == EAP_TTLS_PHASE2_EAP) {
131 if (eap_peer_select_phase2_methods(config, "autheap=",
132 &data->phase2_eap_types,
133 &data->num_phase2_eap_types)
134 < 0) {
135 eap_ttls_deinit(sm, data);
136 return NULL;
137 }
138
139 data->phase2_eap_type.vendor = EAP_VENDOR_IETF;
140 data->phase2_eap_type.method = EAP_TYPE_NONE;
141 }
142
143 #if EAP_TTLS_VERSION > 0
144 if (!(tls_capabilities(sm->ssl_ctx) & TLS_CAPABILITY_IA) &&
145 data->ttls_version > 0) {
146 if (data->force_ttls_version > 0) {
147 wpa_printf(MSG_INFO, "EAP-TTLS: Forced TTLSv%d and "
148 "TLS library does not support TLS/IA.",
149 data->force_ttls_version);
150 eap_ttls_deinit(sm, data);
151 return NULL;
152 }
153 data->ttls_version = 0;
154 }
155 #endif /* EAP_TTLS_VERSION */
156
157 return data;
158 }
159
160
161 static void eap_ttls_phase2_eap_deinit(struct eap_sm *sm,
162 struct eap_ttls_data *data)
163 {
164 if (data->phase2_priv && data->phase2_method) {
165 data->phase2_method->deinit(sm, data->phase2_priv);
166 data->phase2_method = NULL;
167 data->phase2_priv = NULL;
168 }
169 }
170
171
172 static void eap_ttls_deinit(struct eap_sm *sm, void *priv)
173 {
174 struct eap_ttls_data *data = priv;
175 if (data == NULL)
176 return;
177 eap_ttls_phase2_eap_deinit(sm, data);
178 os_free(data->phase2_eap_types);
179 if (data->ssl_initialized)
180 eap_peer_tls_ssl_deinit(sm, &data->ssl);
181 os_free(data->key_data);
182 wpabuf_free(data->pending_phase2_req);
183 os_free(data);
184 }
185
186
187 static u8 * eap_ttls_avp_hdr(u8 *avphdr, u32 avp_code, u32 vendor_id,
188 int mandatory, size_t len)
189 {
190 struct ttls_avp_vendor *avp;
191 u8 flags;
192 size_t hdrlen;
193
194 avp = (struct ttls_avp_vendor *) avphdr;
195 flags = mandatory ? AVP_FLAGS_MANDATORY : 0;
196 if (vendor_id) {
197 flags |= AVP_FLAGS_VENDOR;
198 hdrlen = sizeof(*avp);
199 avp->vendor_id = host_to_be32(vendor_id);
200 } else {
201 hdrlen = sizeof(struct ttls_avp);
202 }
203
204 avp->avp_code = host_to_be32(avp_code);
205 avp->avp_length = host_to_be32((flags << 24) | (hdrlen + len));
206
207 return avphdr + hdrlen;
208 }
209
210
211 static u8 * eap_ttls_avp_add(u8 *start, u8 *avphdr, u32 avp_code,
212 u32 vendor_id, int mandatory,
213 const u8 *data, size_t len)
214 {
215 u8 *pos;
216 pos = eap_ttls_avp_hdr(avphdr, avp_code, vendor_id, mandatory, len);
217 os_memcpy(pos, data, len);
218 pos += len;
219 AVP_PAD(start, pos);
220 return pos;
221 }
222
223
224 static int eap_ttls_avp_encapsulate(struct wpabuf **resp, u32 avp_code,
225 int mandatory)
226 {
227 struct wpabuf *msg;
228 u8 *avp, *pos;
229
230 msg = wpabuf_alloc(sizeof(struct ttls_avp) + wpabuf_len(*resp) + 4);
231 if (msg == NULL) {
232 wpabuf_free(*resp);
233 *resp = NULL;
234 return -1;
235 }
236
237 avp = wpabuf_mhead(msg);
238 pos = eap_ttls_avp_hdr(avp, avp_code, 0, mandatory, wpabuf_len(*resp));
239 os_memcpy(pos, wpabuf_head(*resp), wpabuf_len(*resp));
240 pos += wpabuf_len(*resp);
241 AVP_PAD(avp, pos);
242 wpabuf_free(*resp);
243 wpabuf_put(msg, pos - avp);
244 *resp = msg;
245 return 0;
246 }
247
248
249 #if EAP_TTLS_VERSION > 0
250 static int eap_ttls_ia_permute_inner_secret(struct eap_sm *sm,
251 struct eap_ttls_data *data,
252 const u8 *key, size_t key_len)
253 {
254 u8 *buf;
255 size_t buf_len;
256 int ret;
257
258 if (key) {
259 buf_len = 2 + key_len;
260 buf = os_malloc(buf_len);
261 if (buf == NULL)
262 return -1;
263 WPA_PUT_BE16(buf, key_len);
264 os_memcpy(buf + 2, key, key_len);
265 } else {
266 buf = NULL;
267 buf_len = 0;
268 }
269
270 wpa_hexdump_key(MSG_DEBUG, "EAP-TTLS: Session keys for TLS/IA inner "
271 "secret permutation", buf, buf_len);
272 ret = tls_connection_ia_permute_inner_secret(sm->ssl_ctx,
273 data->ssl.conn,
274 buf, buf_len);
275 os_free(buf);
276
277 return ret;
278 }
279 #endif /* EAP_TTLS_VERSION */
280
281
282 static int eap_ttls_v0_derive_key(struct eap_sm *sm,
283 struct eap_ttls_data *data)
284 {
285 os_free(data->key_data);
286 data->key_data = eap_peer_tls_derive_key(sm, &data->ssl,
287 "ttls keying material",
288 EAP_TLS_KEY_LEN);
289 if (!data->key_data) {
290 wpa_printf(MSG_INFO, "EAP-TTLS: Failed to derive key");
291 return -1;
292 }
293
294 wpa_hexdump_key(MSG_DEBUG, "EAP-TTLS: Derived key",
295 data->key_data, EAP_TLS_KEY_LEN);
296
297 return 0;
298 }
299
300
301 #if EAP_TTLS_VERSION > 0
302 static int eap_ttls_v1_derive_key(struct eap_sm *sm,
303 struct eap_ttls_data *data)
304 {
305 struct tls_keys keys;
306 u8 *rnd;
307
308 os_free(data->key_data);
309 data->key_data = NULL;
310
311 os_memset(&keys, 0, sizeof(keys));
312 if (tls_connection_get_keys(sm->ssl_ctx, data->ssl.conn, &keys) ||
313 keys.client_random == NULL || keys.server_random == NULL ||
314 keys.inner_secret == NULL) {
315 wpa_printf(MSG_INFO, "EAP-TTLS: Could not get inner secret, "
316 "client random, or server random to derive keying "
317 "material");
318 return -1;
319 }
320
321 rnd = os_malloc(keys.client_random_len + keys.server_random_len);
322 data->key_data = os_malloc(EAP_TLS_KEY_LEN);
323 if (rnd == NULL || data->key_data == NULL) {
324 wpa_printf(MSG_INFO, "EAP-TTLS: No memory for key derivation");
325 os_free(rnd);
326 os_free(data->key_data);
327 data->key_data = NULL;
328 return -1;
329 }
330 os_memcpy(rnd, keys.client_random, keys.client_random_len);
331 os_memcpy(rnd + keys.client_random_len, keys.server_random,
332 keys.server_random_len);
333
334 if (tls_prf(keys.inner_secret, keys.inner_secret_len,
335 "ttls v1 keying material", rnd, keys.client_random_len +
336 keys.server_random_len, data->key_data, EAP_TLS_KEY_LEN)) {
337 wpa_printf(MSG_DEBUG, "EAP-TTLS: Failed to derive key");
338 os_free(rnd);
339 os_free(data->key_data);
340 data->key_data = NULL;
341 return -1;
342 }
343
344 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: client/server random",
345 rnd, keys.client_random_len + keys.server_random_len);
346 wpa_hexdump_key(MSG_DEBUG, "EAP-TTLS: TLS/IA inner secret",
347 keys.inner_secret, keys.inner_secret_len);
348
349 os_free(rnd);
350
351 wpa_hexdump_key(MSG_DEBUG, "EAP-TTLS: Derived key",
352 data->key_data, EAP_TLS_KEY_LEN);
353
354 return 0;
355 }
356 #endif /* EAP_TTLS_VERSION */
357
358
359 static u8 * eap_ttls_implicit_challenge(struct eap_sm *sm,
360 struct eap_ttls_data *data, size_t len)
361 {
362 #if EAP_TTLS_VERSION > 0
363 struct tls_keys keys;
364 u8 *challenge, *rnd;
365 #endif /* EAP_TTLS_VERSION */
366
367 if (data->ttls_version == 0) {
368 return eap_peer_tls_derive_key(sm, &data->ssl,
369 "ttls challenge", len);
370 }
371
372 #if EAP_TTLS_VERSION > 0
373
374 os_memset(&keys, 0, sizeof(keys));
375 if (tls_connection_get_keys(sm->ssl_ctx, data->ssl.conn, &keys) ||
376 keys.client_random == NULL || keys.server_random == NULL ||
377 keys.inner_secret == NULL) {
378 wpa_printf(MSG_INFO, "EAP-TTLS: Could not get inner secret, "
379 "client random, or server random to derive "
380 "implicit challenge");
381 return NULL;
382 }
383
384 rnd = os_malloc(keys.client_random_len + keys.server_random_len);
385 challenge = os_malloc(len);
386 if (rnd == NULL || challenge == NULL) {
387 wpa_printf(MSG_INFO, "EAP-TTLS: No memory for implicit "
388 "challenge derivation");
389 os_free(rnd);
390 os_free(challenge);
391 return NULL;
392 }
393 os_memcpy(rnd, keys.server_random, keys.server_random_len);
394 os_memcpy(rnd + keys.server_random_len, keys.client_random,
395 keys.client_random_len);
396
397 if (tls_prf(keys.inner_secret, keys.inner_secret_len,
398 "inner application challenge", rnd,
399 keys.client_random_len + keys.server_random_len,
400 challenge, len)) {
401 wpa_printf(MSG_DEBUG, "EAP-TTLS: Failed to derive implicit "
402 "challenge");
403 os_free(rnd);
404 os_free(challenge);
405 return NULL;
406 }
407
408 os_free(rnd);
409
410 wpa_hexdump_key(MSG_DEBUG, "EAP-TTLS: Derived implicit challenge",
411 challenge, len);
412
413 return challenge;
414
415 #else /* EAP_TTLS_VERSION */
416
417 return NULL;
418
419 #endif /* EAP_TTLS_VERSION */
420 }
421
422
423 static void eap_ttlsv1_phase2_eap_finish(struct eap_sm *sm,
424 struct eap_ttls_data *data,
425 struct eap_method_ret *ret)
426 {
427 #if EAP_TTLS_VERSION > 0
428 if (data->ttls_version > 0) {
429 const struct eap_method *m = data->phase2_method;
430 void *priv = data->phase2_priv;
431
432 /* TTLSv1 requires TLS/IA FinalPhaseFinished */
433 if (ret->decision == DECISION_UNCOND_SUCC)
434 ret->decision = DECISION_COND_SUCC;
435 ret->methodState = METHOD_CONT;
436
437 if (ret->decision == DECISION_COND_SUCC &&
438 m->isKeyAvailable && m->getKey &&
439 m->isKeyAvailable(sm, priv)) {
440 u8 *key;
441 size_t key_len;
442 key = m->getKey(sm, priv, &key_len);
443 if (key) {
444 eap_ttls_ia_permute_inner_secret(
445 sm, data, key, key_len);
446 os_free(key);
447 }
448 }
449 }
450 #endif /* EAP_TTLS_VERSION */
451 }
452
453
454 static void eap_ttls_phase2_select_eap_method(struct eap_ttls_data *data,
455 u8 method)
456 {
457 size_t i;
458 for (i = 0; i < data->num_phase2_eap_types; i++) {
459 if (data->phase2_eap_types[i].vendor != EAP_VENDOR_IETF ||
460 data->phase2_eap_types[i].method != method)
461 continue;
462
463 data->phase2_eap_type.vendor =
464 data->phase2_eap_types[i].vendor;
465 data->phase2_eap_type.method =
466 data->phase2_eap_types[i].method;
467 wpa_printf(MSG_DEBUG, "EAP-TTLS: Selected "
468 "Phase 2 EAP vendor %d method %d",
469 data->phase2_eap_type.vendor,
470 data->phase2_eap_type.method);
471 break;
472 }
473 }
474
475
476 static int eap_ttls_phase2_eap_process(struct eap_sm *sm,
477 struct eap_ttls_data *data,
478 struct eap_method_ret *ret,
479 struct eap_hdr *hdr, size_t len,
480 struct wpabuf **resp)
481 {
482 struct wpabuf msg;
483 struct eap_method_ret iret;
484
485 os_memset(&iret, 0, sizeof(iret));
486 wpabuf_set(&msg, hdr, len);
487 *resp = data->phase2_method->process(sm, data->phase2_priv, &iret,
488 &msg);
489 if ((iret.methodState == METHOD_DONE ||
490 iret.methodState == METHOD_MAY_CONT) &&
491 (iret.decision == DECISION_UNCOND_SUCC ||
492 iret.decision == DECISION_COND_SUCC ||
493 iret.decision == DECISION_FAIL)) {
494 ret->methodState = iret.methodState;
495 ret->decision = iret.decision;
496 }
497 eap_ttlsv1_phase2_eap_finish(sm, data, ret);
498
499 return 0;
500 }
501
502
503 static int eap_ttls_phase2_request_eap_method(struct eap_sm *sm,
504 struct eap_ttls_data *data,
505 struct eap_method_ret *ret,
506 struct eap_hdr *hdr, size_t len,
507 u8 method, struct wpabuf **resp)
508 {
509 #ifdef EAP_TNC
510 if (data->tnc_started && data->phase2_method &&
511 data->phase2_priv && method == EAP_TYPE_TNC &&
512 data->phase2_eap_type.method == EAP_TYPE_TNC)
513 return eap_ttls_phase2_eap_process(sm, data, ret, hdr, len,
514 resp);
515
516 if (data->ready_for_tnc && !data->tnc_started &&
517 method == EAP_TYPE_TNC) {
518 wpa_printf(MSG_DEBUG, "EAP-TTLS: Start TNC after completed "
519 "EAP method");
520 data->tnc_started = 1;
521 }
522
523 if (data->tnc_started) {
524 if (data->phase2_eap_type.vendor != EAP_VENDOR_IETF ||
525 data->phase2_eap_type.method == EAP_TYPE_TNC) {
526 wpa_printf(MSG_DEBUG, "EAP-TTLS: Unexpected EAP "
527 "type %d for TNC", method);
528 return -1;
529 }
530
531 data->phase2_eap_type.vendor = EAP_VENDOR_IETF;
532 data->phase2_eap_type.method = method;
533 wpa_printf(MSG_DEBUG, "EAP-TTLS: Selected "
534 "Phase 2 EAP vendor %d method %d (TNC)",
535 data->phase2_eap_type.vendor,
536 data->phase2_eap_type.method);
537
538 if (data->phase2_type == EAP_TTLS_PHASE2_EAP)
539 eap_ttls_phase2_eap_deinit(sm, data);
540 }
541 #endif /* EAP_TNC */
542
543 if (data->phase2_eap_type.vendor == EAP_VENDOR_IETF &&
544 data->phase2_eap_type.method == EAP_TYPE_NONE)
545 eap_ttls_phase2_select_eap_method(data, method);
546
547 if (method != data->phase2_eap_type.method || method == EAP_TYPE_NONE)
548 {
549 if (eap_peer_tls_phase2_nak(data->phase2_eap_types,
550 data->num_phase2_eap_types,
551 hdr, resp))
552 return -1;
553 return 0;
554 }
555
556 if (data->phase2_priv == NULL) {
557 data->phase2_method = eap_peer_get_eap_method(
558 EAP_VENDOR_IETF, method);
559 if (data->phase2_method) {
560 sm->init_phase2 = 1;
561 data->phase2_priv = data->phase2_method->init(sm);
562 sm->init_phase2 = 0;
563 }
564 }
565 if (data->phase2_priv == NULL || data->phase2_method == NULL) {
566 wpa_printf(MSG_INFO, "EAP-TTLS: failed to initialize "
567 "Phase 2 EAP method %d", method);
568 return -1;
569 }
570
571 return eap_ttls_phase2_eap_process(sm, data, ret, hdr, len, resp);
572 }
573
574
575 static int eap_ttls_phase2_request_eap(struct eap_sm *sm,
576 struct eap_ttls_data *data,
577 struct eap_method_ret *ret,
578 struct eap_hdr *hdr,
579 struct wpabuf **resp)
580 {
581 size_t len = be_to_host16(hdr->length);
582 u8 *pos;
583 struct eap_peer_config *config = eap_get_config(sm);
584
585 if (len <= sizeof(struct eap_hdr)) {
586 wpa_printf(MSG_INFO, "EAP-TTLS: too short "
587 "Phase 2 request (len=%lu)", (unsigned long) len);
588 return -1;
589 }
590 pos = (u8 *) (hdr + 1);
591 wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 EAP Request: type=%d", *pos);
592 switch (*pos) {
593 case EAP_TYPE_IDENTITY:
594 *resp = eap_sm_buildIdentity(sm, hdr->identifier, 1);
595 break;
596 default:
597 if (eap_ttls_phase2_request_eap_method(sm, data, ret, hdr, len,
598 *pos, resp) < 0)
599 return -1;
600 break;
601 }
602
603 if (*resp == NULL &&
604 (config->pending_req_identity || config->pending_req_password ||
605 config->pending_req_otp)) {
606 return 0;
607 }
608
609 if (*resp == NULL)
610 return -1;
611
612 wpa_hexdump_buf(MSG_DEBUG, "EAP-TTLS: AVP encapsulate EAP Response",
613 *resp);
614 return eap_ttls_avp_encapsulate(resp, RADIUS_ATTR_EAP_MESSAGE, 1);
615 }
616
617
618 static void eap_ttlsv1_permute_inner(struct eap_sm *sm,
619 struct eap_ttls_data *data)
620 {
621 #if EAP_TTLS_VERSION > 0
622 u8 session_key[2 * MSCHAPV2_KEY_LEN];
623
624 if (data->ttls_version == 0)
625 return;
626
627 get_asymetric_start_key(data->master_key, session_key,
628 MSCHAPV2_KEY_LEN, 0, 0);
629 get_asymetric_start_key(data->master_key,
630 session_key + MSCHAPV2_KEY_LEN,
631 MSCHAPV2_KEY_LEN, 1, 0);
632 eap_ttls_ia_permute_inner_secret(sm, data, session_key,
633 sizeof(session_key));
634 #endif /* EAP_TTLS_VERSION */
635 }
636
637
638 static int eap_ttls_phase2_request_mschapv2(struct eap_sm *sm,
639 struct eap_ttls_data *data,
640 struct eap_method_ret *ret,
641 struct wpabuf **resp)
642 {
643 struct wpabuf *msg;
644 u8 *buf, *pos, *challenge, *peer_challenge;
645 const u8 *identity, *password;
646 size_t identity_len, password_len;
647 int pwhash;
648
649 wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 MSCHAPV2 Request");
650
651 identity = eap_get_config_identity(sm, &identity_len);
652 password = eap_get_config_password2(sm, &password_len, &pwhash);
653 if (identity == NULL || password == NULL)
654 return -1;
655
656 msg = wpabuf_alloc(identity_len + 1000);
657 if (msg == NULL) {
658 wpa_printf(MSG_ERROR,
659 "EAP-TTLS/MSCHAPV2: Failed to allocate memory");
660 return -1;
661 }
662 pos = buf = wpabuf_mhead(msg);
663
664 /* User-Name */
665 pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_USER_NAME, 0, 1,
666 identity, identity_len);
667
668 /* MS-CHAP-Challenge */
669 challenge = eap_ttls_implicit_challenge(
670 sm, data, EAP_TTLS_MSCHAPV2_CHALLENGE_LEN + 1);
671 if (challenge == NULL) {
672 wpabuf_free(msg);
673 wpa_printf(MSG_ERROR, "EAP-TTLS/MSCHAPV2: Failed to derive "
674 "implicit challenge");
675 return -1;
676 }
677 peer_challenge = challenge + 1 + EAP_TTLS_MSCHAPV2_CHALLENGE_LEN;
678
679 pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_MS_CHAP_CHALLENGE,
680 RADIUS_VENDOR_ID_MICROSOFT, 1,
681 challenge, EAP_TTLS_MSCHAPV2_CHALLENGE_LEN);
682
683 /* MS-CHAP2-Response */
684 pos = eap_ttls_avp_hdr(pos, RADIUS_ATTR_MS_CHAP2_RESPONSE,
685 RADIUS_VENDOR_ID_MICROSOFT, 1,
686 EAP_TTLS_MSCHAPV2_RESPONSE_LEN);
687 data->ident = challenge[EAP_TTLS_MSCHAPV2_CHALLENGE_LEN];
688 *pos++ = data->ident;
689 *pos++ = 0; /* Flags */
690 os_memcpy(pos, peer_challenge, EAP_TTLS_MSCHAPV2_CHALLENGE_LEN);
691 pos += EAP_TTLS_MSCHAPV2_CHALLENGE_LEN;
692 os_memset(pos, 0, 8); /* Reserved, must be zero */
693 pos += 8;
694 if (mschapv2_derive_response(identity, identity_len, password,
695 password_len, pwhash, challenge,
696 peer_challenge, pos, data->auth_response,
697 data->master_key)) {
698 wpabuf_free(msg);
699 wpa_printf(MSG_ERROR, "EAP-TTLS/MSCHAPV2: Failed to derive "
700 "response");
701 return -1;
702 }
703 data->auth_response_valid = 1;
704
705 eap_ttlsv1_permute_inner(sm, data);
706
707 pos += 24;
708 os_free(challenge);
709 AVP_PAD(buf, pos);
710
711 wpabuf_put(msg, pos - buf);
712 *resp = msg;
713
714 if (sm->workaround && data->ttls_version == 0) {
715 /* At least FreeRADIUS seems to be terminating
716 * EAP-TTLS/MSHCAPV2 without the expected MS-CHAP-v2 Success
717 * packet. */
718 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2: EAP workaround - "
719 "allow success without tunneled response");
720 ret->methodState = METHOD_MAY_CONT;
721 ret->decision = DECISION_COND_SUCC;
722 }
723
724 return 0;
725 }
726
727
728 static int eap_ttls_phase2_request_mschap(struct eap_sm *sm,
729 struct eap_ttls_data *data,
730 struct eap_method_ret *ret,
731 struct wpabuf **resp)
732 {
733 struct wpabuf *msg;
734 u8 *buf, *pos, *challenge;
735 const u8 *identity, *password;
736 size_t identity_len, password_len;
737 int pwhash;
738
739 wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 MSCHAP Request");
740
741 identity = eap_get_config_identity(sm, &identity_len);
742 password = eap_get_config_password2(sm, &password_len, &pwhash);
743 if (identity == NULL || password == NULL)
744 return -1;
745
746 msg = wpabuf_alloc(identity_len + 1000);
747 if (msg == NULL) {
748 wpa_printf(MSG_ERROR,
749 "EAP-TTLS/MSCHAP: Failed to allocate memory");
750 return -1;
751 }
752 pos = buf = wpabuf_mhead(msg);
753
754 /* User-Name */
755 pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_USER_NAME, 0, 1,
756 identity, identity_len);
757
758 /* MS-CHAP-Challenge */
759 challenge = eap_ttls_implicit_challenge(
760 sm, data, EAP_TTLS_MSCHAP_CHALLENGE_LEN + 1);
761 if (challenge == NULL) {
762 wpabuf_free(msg);
763 wpa_printf(MSG_ERROR, "EAP-TTLS/MSCHAP: Failed to derive "
764 "implicit challenge");
765 return -1;
766 }
767
768 pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_MS_CHAP_CHALLENGE,
769 RADIUS_VENDOR_ID_MICROSOFT, 1,
770 challenge, EAP_TTLS_MSCHAP_CHALLENGE_LEN);
771
772 /* MS-CHAP-Response */
773 pos = eap_ttls_avp_hdr(pos, RADIUS_ATTR_MS_CHAP_RESPONSE,
774 RADIUS_VENDOR_ID_MICROSOFT, 1,
775 EAP_TTLS_MSCHAP_RESPONSE_LEN);
776 data->ident = challenge[EAP_TTLS_MSCHAP_CHALLENGE_LEN];
777 *pos++ = data->ident;
778 *pos++ = 1; /* Flags: Use NT style passwords */
779 os_memset(pos, 0, 24); /* LM-Response */
780 pos += 24;
781 if (pwhash) {
782 challenge_response(challenge, password, pos); /* NT-Response */
783 wpa_hexdump_key(MSG_DEBUG, "EAP-TTLS: MSCHAP password hash",
784 password, 16);
785 } else {
786 nt_challenge_response(challenge, password, password_len,
787 pos); /* NT-Response */
788 wpa_hexdump_ascii_key(MSG_DEBUG, "EAP-TTLS: MSCHAP password",
789 password, password_len);
790 }
791 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: MSCHAP implicit challenge",
792 challenge, EAP_TTLS_MSCHAP_CHALLENGE_LEN);
793 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: MSCHAP response", pos, 24);
794 pos += 24;
795 os_free(challenge);
796 AVP_PAD(buf, pos);
797
798 wpabuf_put(msg, pos - buf);
799 *resp = msg;
800
801 if (data->ttls_version > 0) {
802 /* EAP-TTLSv1 uses TLS/IA FinalPhaseFinished to report success,
803 * so do not allow connection to be terminated yet. */
804 ret->methodState = METHOD_CONT;
805 ret->decision = DECISION_COND_SUCC;
806 } else {
807 /* EAP-TTLS/MSCHAP does not provide tunneled success
808 * notification, so assume that Phase2 succeeds. */
809 ret->methodState = METHOD_DONE;
810 ret->decision = DECISION_COND_SUCC;
811 }
812
813 return 0;
814 }
815
816
817 static int eap_ttls_phase2_request_pap(struct eap_sm *sm,
818 struct eap_ttls_data *data,
819 struct eap_method_ret *ret,
820 struct wpabuf **resp)
821 {
822 struct wpabuf *msg;
823 u8 *buf, *pos;
824 size_t pad;
825 const u8 *identity, *password;
826 size_t identity_len, password_len;
827
828 wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 PAP Request");
829
830 identity = eap_get_config_identity(sm, &identity_len);
831 password = eap_get_config_password(sm, &password_len);
832 if (identity == NULL || password == NULL)
833 return -1;
834
835 msg = wpabuf_alloc(identity_len + password_len + 100);
836 if (msg == NULL) {
837 wpa_printf(MSG_ERROR,
838 "EAP-TTLS/PAP: Failed to allocate memory");
839 return -1;
840 }
841 pos = buf = wpabuf_mhead(msg);
842
843 /* User-Name */
844 pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_USER_NAME, 0, 1,
845 identity, identity_len);
846
847 /* User-Password; in RADIUS, this is encrypted, but EAP-TTLS encrypts
848 * the data, so no separate encryption is used in the AVP itself.
849 * However, the password is padded to obfuscate its length. */
850 pad = password_len == 0 ? 16 : (16 - (password_len & 15)) & 15;
851 pos = eap_ttls_avp_hdr(pos, RADIUS_ATTR_USER_PASSWORD, 0, 1,
852 password_len + pad);
853 os_memcpy(pos, password, password_len);
854 pos += password_len;
855 os_memset(pos, 0, pad);
856 pos += pad;
857 AVP_PAD(buf, pos);
858
859 wpabuf_put(msg, pos - buf);
860 *resp = msg;
861
862 if (data->ttls_version > 0) {
863 /* EAP-TTLSv1 uses TLS/IA FinalPhaseFinished to report success,
864 * so do not allow connection to be terminated yet. */
865 ret->methodState = METHOD_CONT;
866 ret->decision = DECISION_COND_SUCC;
867 } else {
868 /* EAP-TTLS/PAP does not provide tunneled success notification,
869 * so assume that Phase2 succeeds. */
870 ret->methodState = METHOD_DONE;
871 ret->decision = DECISION_COND_SUCC;
872 }
873
874 return 0;
875 }
876
877
878 static int eap_ttls_phase2_request_chap(struct eap_sm *sm,
879 struct eap_ttls_data *data,
880 struct eap_method_ret *ret,
881 struct wpabuf **resp)
882 {
883 struct wpabuf *msg;
884 u8 *buf, *pos, *challenge;
885 const u8 *identity, *password;
886 size_t identity_len, password_len;
887
888 wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 CHAP Request");
889
890 identity = eap_get_config_identity(sm, &identity_len);
891 password = eap_get_config_password(sm, &password_len);
892 if (identity == NULL || password == NULL)
893 return -1;
894
895 msg = wpabuf_alloc(identity_len + 1000);
896 if (msg == NULL) {
897 wpa_printf(MSG_ERROR,
898 "EAP-TTLS/CHAP: Failed to allocate memory");
899 return -1;
900 }
901 pos = buf = wpabuf_mhead(msg);
902
903 /* User-Name */
904 pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_USER_NAME, 0, 1,
905 identity, identity_len);
906
907 /* CHAP-Challenge */
908 challenge = eap_ttls_implicit_challenge(
909 sm, data, EAP_TTLS_CHAP_CHALLENGE_LEN + 1);
910 if (challenge == NULL) {
911 wpabuf_free(msg);
912 wpa_printf(MSG_ERROR, "EAP-TTLS/CHAP: Failed to derive "
913 "implicit challenge");
914 return -1;
915 }
916
917 pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_CHAP_CHALLENGE, 0, 1,
918 challenge, EAP_TTLS_CHAP_CHALLENGE_LEN);
919
920 /* CHAP-Password */
921 pos = eap_ttls_avp_hdr(pos, RADIUS_ATTR_CHAP_PASSWORD, 0, 1,
922 1 + EAP_TTLS_CHAP_PASSWORD_LEN);
923 data->ident = challenge[EAP_TTLS_CHAP_CHALLENGE_LEN];
924 *pos++ = data->ident;
925
926 /* MD5(Ident + Password + Challenge) */
927 chap_md5(data->ident, password, password_len, challenge,
928 EAP_TTLS_CHAP_CHALLENGE_LEN, pos);
929
930 wpa_hexdump_ascii(MSG_DEBUG, "EAP-TTLS: CHAP username",
931 identity, identity_len);
932 wpa_hexdump_ascii_key(MSG_DEBUG, "EAP-TTLS: CHAP password",
933 password, password_len);
934 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: CHAP implicit challenge",
935 challenge, EAP_TTLS_CHAP_CHALLENGE_LEN);
936 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: CHAP password",
937 pos, EAP_TTLS_CHAP_PASSWORD_LEN);
938 pos += EAP_TTLS_CHAP_PASSWORD_LEN;
939 os_free(challenge);
940 AVP_PAD(buf, pos);
941
942 wpabuf_put(msg, pos - buf);
943 *resp = msg;
944
945 if (data->ttls_version > 0) {
946 /* EAP-TTLSv1 uses TLS/IA FinalPhaseFinished to report success,
947 * so do not allow connection to be terminated yet. */
948 ret->methodState = METHOD_CONT;
949 ret->decision = DECISION_COND_SUCC;
950 } else {
951 /* EAP-TTLS/CHAP does not provide tunneled success
952 * notification, so assume that Phase2 succeeds. */
953 ret->methodState = METHOD_DONE;
954 ret->decision = DECISION_COND_SUCC;
955 }
956
957 return 0;
958 }
959
960
961 static int eap_ttls_phase2_request(struct eap_sm *sm,
962 struct eap_ttls_data *data,
963 struct eap_method_ret *ret,
964 struct eap_hdr *hdr,
965 struct wpabuf **resp)
966 {
967 int res = 0;
968 size_t len;
969 enum phase2_types phase2_type = data->phase2_type;
970
971 #ifdef EAP_TNC
972 if (data->tnc_started) {
973 wpa_printf(MSG_DEBUG, "EAP-TTLS: Processing TNC");
974 phase2_type = EAP_TTLS_PHASE2_EAP;
975 }
976 #endif /* EAP_TNC */
977
978 if (phase2_type == EAP_TTLS_PHASE2_MSCHAPV2 ||
979 phase2_type == EAP_TTLS_PHASE2_MSCHAP ||
980 phase2_type == EAP_TTLS_PHASE2_PAP ||
981 phase2_type == EAP_TTLS_PHASE2_CHAP) {
982 if (eap_get_config_identity(sm, &len) == NULL) {
983 wpa_printf(MSG_INFO,
984 "EAP-TTLS: Identity not configured");
985 eap_sm_request_identity(sm);
986 if (eap_get_config_password(sm, &len) == NULL)
987 eap_sm_request_password(sm);
988 return 0;
989 }
990
991 if (eap_get_config_password(sm, &len) == NULL) {
992 wpa_printf(MSG_INFO,
993 "EAP-TTLS: Password not configured");
994 eap_sm_request_password(sm);
995 return 0;
996 }
997 }
998
999 switch (phase2_type) {
1000 case EAP_TTLS_PHASE2_EAP:
1001 res = eap_ttls_phase2_request_eap(sm, data, ret, hdr, resp);
1002 break;
1003 case EAP_TTLS_PHASE2_MSCHAPV2:
1004 res = eap_ttls_phase2_request_mschapv2(sm, data, ret, resp);
1005 break;
1006 case EAP_TTLS_PHASE2_MSCHAP:
1007 res = eap_ttls_phase2_request_mschap(sm, data, ret, resp);
1008 break;
1009 case EAP_TTLS_PHASE2_PAP:
1010 res = eap_ttls_phase2_request_pap(sm, data, ret, resp);
1011 break;
1012 case EAP_TTLS_PHASE2_CHAP:
1013 res = eap_ttls_phase2_request_chap(sm, data, ret, resp);
1014 break;
1015 default:
1016 wpa_printf(MSG_ERROR, "EAP-TTLS: Phase 2 - Unknown");
1017 res = -1;
1018 break;
1019 }
1020
1021 if (res < 0) {
1022 ret->methodState = METHOD_DONE;
1023 ret->decision = DECISION_FAIL;
1024 }
1025
1026 return res;
1027 }
1028
1029
1030 #if EAP_TTLS_VERSION > 0
1031 static struct wpabuf * eap_ttls_build_phase_finished(
1032 struct eap_sm *sm, struct eap_ttls_data *data, int id, int final)
1033 {
1034 struct wpabuf *req, *buf;
1035
1036 buf = tls_connection_ia_send_phase_finished(sm->ssl_ctx,
1037 data->ssl.conn,
1038 final);
1039 if (buf == NULL)
1040 return NULL;
1041
1042 req = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_TTLS,
1043 1 + wpabuf_len(buf),
1044 EAP_CODE_RESPONSE, id);
1045 if (req == NULL) {
1046 wpabuf_free(buf);
1047 return NULL;
1048 }
1049
1050 wpabuf_put_u8(req, data->ttls_version);
1051 wpabuf_put_buf(req, buf);
1052 wpabuf_free(buf);
1053 eap_update_len(req);
1054
1055 return req;
1056 }
1057 #endif /* EAP_TTLS_VERSION */
1058
1059
1060 struct ttls_parse_avp {
1061 u8 *mschapv2;
1062 u8 *eapdata;
1063 size_t eap_len;
1064 int mschapv2_error;
1065 };
1066
1067
1068 static int eap_ttls_parse_attr_eap(const u8 *dpos, size_t dlen,
1069 struct ttls_parse_avp *parse)
1070 {
1071 wpa_printf(MSG_DEBUG, "EAP-TTLS: AVP - EAP Message");
1072 if (parse->eapdata == NULL) {
1073 parse->eapdata = os_malloc(dlen);
1074 if (parse->eapdata == NULL) {
1075 wpa_printf(MSG_WARNING, "EAP-TTLS: Failed to allocate "
1076 "memory for Phase 2 EAP data");
1077 return -1;
1078 }
1079 os_memcpy(parse->eapdata, dpos, dlen);
1080 parse->eap_len = dlen;
1081 } else {
1082 u8 *neweap = os_realloc(parse->eapdata, parse->eap_len + dlen);
1083 if (neweap == NULL) {
1084 wpa_printf(MSG_WARNING, "EAP-TTLS: Failed to allocate "
1085 "memory for Phase 2 EAP data");
1086 return -1;
1087 }
1088 os_memcpy(neweap + parse->eap_len, dpos, dlen);
1089 parse->eapdata = neweap;
1090 parse->eap_len += dlen;
1091 }
1092
1093 return 0;
1094 }
1095
1096
1097 static int eap_ttls_parse_avp(u8 *pos, size_t left,
1098 struct ttls_parse_avp *parse)
1099 {
1100 struct ttls_avp *avp;
1101 u32 avp_code, avp_length, vendor_id = 0;
1102 u8 avp_flags, *dpos;
1103 size_t dlen;
1104
1105 avp = (struct ttls_avp *) pos;
1106 avp_code = be_to_host32(avp->avp_code);
1107 avp_length = be_to_host32(avp->avp_length);
1108 avp_flags = (avp_length >> 24) & 0xff;
1109 avp_length &= 0xffffff;
1110 wpa_printf(MSG_DEBUG, "EAP-TTLS: AVP: code=%d flags=0x%02x "
1111 "length=%d", (int) avp_code, avp_flags,
1112 (int) avp_length);
1113
1114 if (avp_length > left) {
1115 wpa_printf(MSG_WARNING, "EAP-TTLS: AVP overflow "
1116 "(len=%d, left=%lu) - dropped",
1117 (int) avp_length, (unsigned long) left);
1118 return -1;
1119 }
1120
1121 if (avp_length < sizeof(*avp)) {
1122 wpa_printf(MSG_WARNING, "EAP-TTLS: Invalid AVP length %d",
1123 avp_length);
1124 return -1;
1125 }
1126
1127 dpos = (u8 *) (avp + 1);
1128 dlen = avp_length - sizeof(*avp);
1129 if (avp_flags & AVP_FLAGS_VENDOR) {
1130 if (dlen < 4) {
1131 wpa_printf(MSG_WARNING, "EAP-TTLS: Vendor AVP "
1132 "underflow");
1133 return -1;
1134 }
1135 vendor_id = WPA_GET_BE32(dpos);
1136 wpa_printf(MSG_DEBUG, "EAP-TTLS: AVP vendor_id %d",
1137 (int) vendor_id);
1138 dpos += 4;
1139 dlen -= 4;
1140 }
1141
1142 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: AVP data", dpos, dlen);
1143
1144 if (vendor_id == 0 && avp_code == RADIUS_ATTR_EAP_MESSAGE) {
1145 if (eap_ttls_parse_attr_eap(dpos, dlen, parse) < 0)
1146 return -1;
1147 } else if (vendor_id == 0 && avp_code == RADIUS_ATTR_REPLY_MESSAGE) {
1148 /* This is an optional message that can be displayed to
1149 * the user. */
1150 wpa_hexdump_ascii(MSG_DEBUG, "EAP-TTLS: AVP - Reply-Message",
1151 dpos, dlen);
1152 } else if (vendor_id == RADIUS_VENDOR_ID_MICROSOFT &&
1153 avp_code == RADIUS_ATTR_MS_CHAP2_SUCCESS) {
1154 wpa_hexdump_ascii(MSG_DEBUG, "EAP-TTLS: MS-CHAP2-Success",
1155 dpos, dlen);
1156 if (dlen != 43) {
1157 wpa_printf(MSG_WARNING, "EAP-TTLS: Unexpected "
1158 "MS-CHAP2-Success length "
1159 "(len=%lu, expected 43)",
1160 (unsigned long) dlen);
1161 return -1;
1162 }
1163 parse->mschapv2 = dpos;
1164 } else if (vendor_id == RADIUS_VENDOR_ID_MICROSOFT &&
1165 avp_code == RADIUS_ATTR_MS_CHAP_ERROR) {
1166 wpa_hexdump_ascii(MSG_DEBUG, "EAP-TTLS: MS-CHAP-Error",
1167 dpos, dlen);
1168 parse->mschapv2_error = 1;
1169 } else if (avp_flags & AVP_FLAGS_MANDATORY) {
1170 wpa_printf(MSG_WARNING, "EAP-TTLS: Unsupported mandatory AVP "
1171 "code %d vendor_id %d - dropped",
1172 (int) avp_code, (int) vendor_id);
1173 return -1;
1174 } else {
1175 wpa_printf(MSG_DEBUG, "EAP-TTLS: Ignoring unsupported AVP "
1176 "code %d vendor_id %d",
1177 (int) avp_code, (int) vendor_id);
1178 }
1179
1180 return avp_length;
1181 }
1182
1183
1184 static int eap_ttls_parse_avps(struct wpabuf *in_decrypted,
1185 struct ttls_parse_avp *parse)
1186 {
1187 u8 *pos;
1188 size_t left, pad;
1189 int avp_length;
1190
1191 pos = wpabuf_mhead(in_decrypted);
1192 left = wpabuf_len(in_decrypted);
1193 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: Decrypted Phase 2 AVPs", pos, left);
1194 if (left < sizeof(struct ttls_avp)) {
1195 wpa_printf(MSG_WARNING, "EAP-TTLS: Too short Phase 2 AVP frame"
1196 " len=%lu expected %lu or more - dropped",
1197 (unsigned long) left,
1198 (unsigned long) sizeof(struct ttls_avp));
1199 return -1;
1200 }
1201
1202 /* Parse AVPs */
1203 os_memset(parse, 0, sizeof(*parse));
1204
1205 while (left > 0) {
1206 avp_length = eap_ttls_parse_avp(pos, left, parse);
1207 if (avp_length < 0)
1208 return -1;
1209
1210 pad = (4 - (avp_length & 3)) & 3;
1211 pos += avp_length + pad;
1212 if (left < avp_length + pad)
1213 left = 0;
1214 else
1215 left -= avp_length + pad;
1216 }
1217
1218 return 0;
1219 }
1220
1221
1222 static u8 * eap_ttls_fake_identity_request(void)
1223 {
1224 struct eap_hdr *hdr;
1225 u8 *buf;
1226
1227 wpa_printf(MSG_DEBUG, "EAP-TTLS: empty data in beginning of "
1228 "Phase 2 - use fake EAP-Request Identity");
1229 buf = os_malloc(sizeof(*hdr) + 1);
1230 if (buf == NULL) {
1231 wpa_printf(MSG_WARNING, "EAP-TTLS: failed to allocate "
1232 "memory for fake EAP-Identity Request");
1233 return NULL;
1234 }
1235
1236 hdr = (struct eap_hdr *) buf;
1237 hdr->code = EAP_CODE_REQUEST;
1238 hdr->identifier = 0;
1239 hdr->length = host_to_be16(sizeof(*hdr) + 1);
1240 buf[sizeof(*hdr)] = EAP_TYPE_IDENTITY;
1241
1242 return buf;
1243 }
1244
1245
1246 static int eap_ttls_encrypt_response(struct eap_sm *sm,
1247 struct eap_ttls_data *data,
1248 struct wpabuf *resp, u8 identifier,
1249 struct wpabuf **out_data)
1250 {
1251 if (resp == NULL)
1252 return 0;
1253
1254 wpa_hexdump_buf_key(MSG_DEBUG, "EAP-TTLS: Encrypting Phase 2 data",
1255 resp);
1256 if (eap_peer_tls_encrypt(sm, &data->ssl, EAP_TYPE_TTLS,
1257 data->ttls_version, identifier,
1258 resp, out_data)) {
1259 wpa_printf(MSG_INFO, "EAP-TTLS: Failed to encrypt a Phase 2 "
1260 "frame");
1261 return -1;
1262 }
1263 wpabuf_free(resp);
1264
1265 return 0;
1266 }
1267
1268
1269 static int eap_ttls_process_phase2_eap(struct eap_sm *sm,
1270 struct eap_ttls_data *data,
1271 struct eap_method_ret *ret,
1272 struct ttls_parse_avp *parse,
1273 struct wpabuf **resp)
1274 {
1275 struct eap_hdr *hdr;
1276 size_t len;
1277
1278 if (parse->eapdata == NULL) {
1279 wpa_printf(MSG_WARNING, "EAP-TTLS: No EAP Message in the "
1280 "packet - dropped");
1281 return -1;
1282 }
1283
1284 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: Phase 2 EAP",
1285 parse->eapdata, parse->eap_len);
1286 hdr = (struct eap_hdr *) parse->eapdata;
1287
1288 if (parse->eap_len < sizeof(*hdr)) {
1289 wpa_printf(MSG_WARNING, "EAP-TTLS: Too short Phase 2 EAP "
1290 "frame (len=%lu, expected %lu or more) - dropped",
1291 (unsigned long) parse->eap_len,
1292 (unsigned long) sizeof(*hdr));
1293 return -1;
1294 }
1295 len = be_to_host16(hdr->length);
1296 if (len > parse->eap_len) {
1297 wpa_printf(MSG_INFO, "EAP-TTLS: Length mismatch in Phase 2 "
1298 "EAP frame (EAP hdr len=%lu, EAP data len in "
1299 "AVP=%lu)",
1300 (unsigned long) len,
1301 (unsigned long) parse->eap_len);
1302 return -1;
1303 }
1304 wpa_printf(MSG_DEBUG, "EAP-TTLS: received Phase 2: code=%d "
1305 "identifier=%d length=%lu",
1306 hdr->code, hdr->identifier, (unsigned long) len);
1307 switch (hdr->code) {
1308 case EAP_CODE_REQUEST:
1309 if (eap_ttls_phase2_request(sm, data, ret, hdr, resp)) {
1310 wpa_printf(MSG_INFO, "EAP-TTLS: Phase2 Request "
1311 "processing failed");
1312 return -1;
1313 }
1314 break;
1315 default:
1316 wpa_printf(MSG_INFO, "EAP-TTLS: Unexpected code=%d in "
1317 "Phase 2 EAP header", hdr->code);
1318 return -1;
1319 }
1320
1321 return 0;
1322 }
1323
1324
1325 static int eap_ttls_process_phase2_mschapv2(struct eap_sm *sm,
1326 struct eap_ttls_data *data,
1327 struct eap_method_ret *ret,
1328 struct ttls_parse_avp *parse)
1329 {
1330 if (parse->mschapv2_error) {
1331 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2: Received "
1332 "MS-CHAP-Error - failed");
1333 ret->methodState = METHOD_DONE;
1334 ret->decision = DECISION_FAIL;
1335 /* Reply with empty data to ACK error */
1336 return 1;
1337 }
1338
1339 if (parse->mschapv2 == NULL) {
1340 #ifdef EAP_TNC
1341 if (data->phase2_success && parse->eapdata) {
1342 /*
1343 * Allow EAP-TNC to be started after successfully
1344 * completed MSCHAPV2.
1345 */
1346 return 1;
1347 }
1348 #endif /* EAP_TNC */
1349 wpa_printf(MSG_WARNING, "EAP-TTLS: no MS-CHAP2-Success AVP "
1350 "received for Phase2 MSCHAPV2");
1351 return -1;
1352 }
1353 if (parse->mschapv2[0] != data->ident) {
1354 wpa_printf(MSG_WARNING, "EAP-TTLS: Ident mismatch for Phase 2 "
1355 "MSCHAPV2 (received Ident 0x%02x, expected 0x%02x)",
1356 parse->mschapv2[0], data->ident);
1357 return -1;
1358 }
1359 if (!data->auth_response_valid ||
1360 mschapv2_verify_auth_response(data->auth_response,
1361 parse->mschapv2 + 1, 42)) {
1362 wpa_printf(MSG_WARNING, "EAP-TTLS: Invalid authenticator "
1363 "response in Phase 2 MSCHAPV2 success request");
1364 return -1;
1365 }
1366
1367 wpa_printf(MSG_INFO, "EAP-TTLS: Phase 2 MSCHAPV2 "
1368 "authentication succeeded");
1369 if (data->ttls_version > 0) {
1370 /*
1371 * EAP-TTLSv1 uses TLS/IA FinalPhaseFinished to report
1372 * success, so do not allow connection to be terminated
1373 * yet.
1374 */
1375 ret->methodState = METHOD_CONT;
1376 ret->decision = DECISION_COND_SUCC;
1377 } else {
1378 ret->methodState = METHOD_DONE;
1379 ret->decision = DECISION_UNCOND_SUCC;
1380 data->phase2_success = 1;
1381 }
1382
1383 /*
1384 * Reply with empty data; authentication server will reply
1385 * with EAP-Success after this.
1386 */
1387 return 1;
1388 }
1389
1390
1391 #ifdef EAP_TNC
1392 static int eap_ttls_process_tnc_start(struct eap_sm *sm,
1393 struct eap_ttls_data *data,
1394 struct eap_method_ret *ret,
1395 struct ttls_parse_avp *parse,
1396 struct wpabuf **resp)
1397 {
1398 /* TNC uses inner EAP method after non-EAP TTLS phase 2. */
1399 if (parse->eapdata == NULL) {
1400 wpa_printf(MSG_INFO, "EAP-TTLS: Phase 2 received "
1401 "unexpected tunneled data (no EAP)");
1402 return -1;
1403 }
1404
1405 if (!data->ready_for_tnc) {
1406 wpa_printf(MSG_INFO, "EAP-TTLS: Phase 2 received "
1407 "EAP after non-EAP, but not ready for TNC");
1408 return -1;
1409 }
1410
1411 wpa_printf(MSG_DEBUG, "EAP-TTLS: Start TNC after completed "
1412 "non-EAP method");
1413 data->tnc_started = 1;
1414
1415 if (eap_ttls_process_phase2_eap(sm, data, ret, parse, resp) < 0)
1416 return -1;
1417
1418 return 0;
1419 }
1420 #endif /* EAP_TNC */
1421
1422
1423 static int eap_ttls_process_decrypted(struct eap_sm *sm,
1424 struct eap_ttls_data *data,
1425 struct eap_method_ret *ret,
1426 u8 identifier,
1427 struct ttls_parse_avp *parse,
1428 struct wpabuf *in_decrypted,
1429 struct wpabuf **out_data)
1430 {
1431 struct wpabuf *resp = NULL;
1432 struct eap_peer_config *config = eap_get_config(sm);
1433 int res;
1434 enum phase2_types phase2_type = data->phase2_type;
1435
1436 #ifdef EAP_TNC
1437 if (data->tnc_started)
1438 phase2_type = EAP_TTLS_PHASE2_EAP;
1439 #endif /* EAP_TNC */
1440
1441 switch (phase2_type) {
1442 case EAP_TTLS_PHASE2_EAP:
1443 if (eap_ttls_process_phase2_eap(sm, data, ret, parse, &resp) <
1444 0)
1445 return -1;
1446 break;
1447 case EAP_TTLS_PHASE2_MSCHAPV2:
1448 res = eap_ttls_process_phase2_mschapv2(sm, data, ret, parse);
1449 #ifdef EAP_TNC
1450 if (res == 1 && parse->eapdata && data->phase2_success) {
1451 /*
1452 * TNC may be required as the next
1453 * authentication method within the tunnel.
1454 */
1455 ret->methodState = METHOD_MAY_CONT;
1456 data->ready_for_tnc = 1;
1457 if (eap_ttls_process_tnc_start(sm, data, ret, parse,
1458 &resp) == 0)
1459 break;
1460 }
1461 #endif /* EAP_TNC */
1462 return res;
1463 case EAP_TTLS_PHASE2_MSCHAP:
1464 case EAP_TTLS_PHASE2_PAP:
1465 case EAP_TTLS_PHASE2_CHAP:
1466 #ifdef EAP_TNC
1467 if (eap_ttls_process_tnc_start(sm, data, ret, parse, &resp) <
1468 0)
1469 return -1;
1470 break;
1471 #else /* EAP_TNC */
1472 /* EAP-TTLS/{MSCHAP,PAP,CHAP} should not send any TLS tunneled
1473 * requests to the supplicant */
1474 wpa_printf(MSG_INFO, "EAP-TTLS: Phase 2 received unexpected "
1475 "tunneled data");
1476 return -1;
1477 #endif /* EAP_TNC */
1478 }
1479
1480 if (resp) {
1481 if (eap_ttls_encrypt_response(sm, data, resp, identifier,
1482 out_data) < 0)
1483 return -1;
1484 } else if (config->pending_req_identity ||
1485 config->pending_req_password ||
1486 config->pending_req_otp ||
1487 config->pending_req_new_password) {
1488 wpabuf_free(data->pending_phase2_req);
1489 data->pending_phase2_req = wpabuf_dup(in_decrypted);
1490 }
1491
1492 return 0;
1493 }
1494
1495
1496 #if EAP_TTLS_VERSION > 0
1497 static void eap_ttls_final_phase_finished(struct eap_sm *sm,
1498 struct eap_ttls_data *data,
1499 struct eap_method_ret *ret,
1500 u8 identifier,
1501 struct wpabuf **out_data)
1502 {
1503 wpa_printf(MSG_DEBUG, "EAP-TTLS: FinalPhaseFinished received");
1504 wpa_printf(MSG_INFO, "EAP-TTLS: TLS/IA authentication succeeded");
1505 ret->methodState = METHOD_DONE;
1506 ret->decision = DECISION_UNCOND_SUCC;
1507 data->phase2_success = 1;
1508 *out_data = eap_ttls_build_phase_finished(sm, data, identifier, 1);
1509 eap_ttls_v1_derive_key(sm, data);
1510 }
1511 #endif /* EAP_TTLS_VERSION */
1512
1513
1514 static int eap_ttls_implicit_identity_request(struct eap_sm *sm,
1515 struct eap_ttls_data *data,
1516 struct eap_method_ret *ret,
1517 u8 identifier,
1518 struct wpabuf **out_data)
1519 {
1520 int retval = 0;
1521 struct eap_hdr *hdr;
1522 struct wpabuf *resp;
1523
1524 hdr = (struct eap_hdr *) eap_ttls_fake_identity_request();
1525 if (hdr == NULL) {
1526 ret->methodState = METHOD_DONE;
1527 ret->decision = DECISION_FAIL;
1528 return -1;
1529 }
1530
1531 resp = NULL;
1532 if (eap_ttls_phase2_request(sm, data, ret, hdr, &resp)) {
1533 wpa_printf(MSG_INFO, "EAP-TTLS: Phase2 Request "
1534 "processing failed");
1535 retval = -1;
1536 } else {
1537 retval = eap_ttls_encrypt_response(sm, data, resp, identifier,
1538 out_data);
1539 }
1540
1541 os_free(hdr);
1542
1543 if (retval < 0) {
1544 ret->methodState = METHOD_DONE;
1545 ret->decision = DECISION_FAIL;
1546 }
1547
1548 return retval;
1549 }
1550
1551
1552 static int eap_ttls_phase2_start(struct eap_sm *sm, struct eap_ttls_data *data,
1553 struct eap_method_ret *ret, u8 identifier,
1554 struct wpabuf **out_data)
1555 {
1556 data->phase2_start = 0;
1557
1558 /*
1559 * EAP-TTLS does not use Phase2 on fast re-auth; this must be done only
1560 * if TLS part was indeed resuming a previous session. Most
1561 * Authentication Servers terminate EAP-TTLS before reaching this
1562 * point, but some do not. Make wpa_supplicant stop phase 2 here, if
1563 * needed.
1564 */
1565 if (data->reauth &&
1566 tls_connection_resumed(sm->ssl_ctx, data->ssl.conn)) {
1567 wpa_printf(MSG_DEBUG, "EAP-TTLS: Session resumption - "
1568 "skip phase 2");
1569 *out_data = eap_peer_tls_build_ack(identifier, EAP_TYPE_TTLS,
1570 data->ttls_version);
1571 ret->methodState = METHOD_DONE;
1572 ret->decision = DECISION_UNCOND_SUCC;
1573 data->phase2_success = 1;
1574 return 0;
1575 }
1576
1577 return eap_ttls_implicit_identity_request(sm, data, ret, identifier,
1578 out_data);
1579 }
1580
1581
1582 static int eap_ttls_decrypt(struct eap_sm *sm, struct eap_ttls_data *data,
1583 struct eap_method_ret *ret, u8 identifier,
1584 const struct wpabuf *in_data,
1585 struct wpabuf **out_data)
1586 {
1587 struct wpabuf *in_decrypted = NULL;
1588 int retval = 0;
1589 struct ttls_parse_avp parse;
1590
1591 os_memset(&parse, 0, sizeof(parse));
1592
1593 wpa_printf(MSG_DEBUG, "EAP-TTLS: received %lu bytes encrypted data for"
1594 " Phase 2",
1595 in_data ? (unsigned long) wpabuf_len(in_data) : 0);
1596
1597 if (data->pending_phase2_req) {
1598 wpa_printf(MSG_DEBUG, "EAP-TTLS: Pending Phase 2 request - "
1599 "skip decryption and use old data");
1600 /* Clear TLS reassembly state. */
1601 eap_peer_tls_reset_input(&data->ssl);
1602
1603 in_decrypted = data->pending_phase2_req;
1604 data->pending_phase2_req = NULL;
1605 if (wpabuf_len(in_decrypted) == 0) {
1606 wpabuf_free(in_decrypted);
1607 return eap_ttls_implicit_identity_request(
1608 sm, data, ret, identifier, out_data);
1609 }
1610 goto continue_req;
1611 }
1612
1613 if ((in_data == NULL || wpabuf_len(in_data) == 0) &&
1614 data->phase2_start) {
1615 return eap_ttls_phase2_start(sm, data, ret, identifier,
1616 out_data);
1617 }
1618
1619 if (in_data == NULL || wpabuf_len(in_data) == 0) {
1620 /* Received TLS ACK - requesting more fragments */
1621 return eap_peer_tls_encrypt(sm, &data->ssl, EAP_TYPE_TTLS,
1622 data->ttls_version,
1623 identifier, NULL, out_data);
1624 }
1625
1626 retval = eap_peer_tls_decrypt(sm, &data->ssl, in_data, &in_decrypted);
1627 if (retval)
1628 goto done;
1629
1630 #if EAP_TTLS_VERSION > 0
1631 if (data->ttls_version > 0 &&
1632 (in_decrypted == NULL || wpabuf_len(in_decrypted) == 0) &&
1633 tls_connection_ia_final_phase_finished(sm->ssl_ctx,
1634 data->ssl.conn)) {
1635 eap_ttls_final_phase_finished(sm, data, ret, identifier,
1636 out_data);
1637 goto done;
1638 }
1639 #endif /* EAP_TTLS_VERSION */
1640
1641 continue_req:
1642 data->phase2_start = 0;
1643
1644 if (eap_ttls_parse_avps(in_decrypted, &parse) < 0) {
1645 retval = -1;
1646 goto done;
1647 }
1648
1649 retval = eap_ttls_process_decrypted(sm, data, ret, identifier,
1650 &parse, in_decrypted, out_data);
1651
1652 done:
1653 wpabuf_free(in_decrypted);
1654 os_free(parse.eapdata);
1655
1656 if (retval < 0) {
1657 ret->methodState = METHOD_DONE;
1658 ret->decision = DECISION_FAIL;
1659 }
1660
1661 return retval;
1662 }
1663
1664
1665 static int eap_ttls_process_start(struct eap_sm *sm,
1666 struct eap_ttls_data *data, u8 flags,
1667 struct eap_method_ret *ret)
1668 {
1669 struct eap_peer_config *config = eap_get_config(sm);
1670
1671 wpa_printf(MSG_DEBUG, "EAP-TTLS: Start (server ver=%d, own ver=%d)",
1672 flags & EAP_TLS_VERSION_MASK, data->ttls_version);
1673 #if EAP_TTLS_VERSION > 0
1674 if ((flags & EAP_TLS_VERSION_MASK) < data->ttls_version)
1675 data->ttls_version = flags & EAP_TLS_VERSION_MASK;
1676 if (data->force_ttls_version >= 0 &&
1677 data->force_ttls_version != data->ttls_version) {
1678 wpa_printf(MSG_WARNING, "EAP-TTLS: Failed to select "
1679 "forced TTLS version %d",
1680 data->force_ttls_version);
1681 ret->methodState = METHOD_DONE;
1682 ret->decision = DECISION_FAIL;
1683 ret->allowNotifications = FALSE;
1684 return -1;
1685 }
1686 wpa_printf(MSG_DEBUG, "EAP-TTLS: Using TTLS version %d",
1687 data->ttls_version);
1688
1689 if (data->ttls_version > 0)
1690 data->ssl.tls_ia = 1;
1691 #endif /* EAP_TTLS_VERSION */
1692 if (!data->ssl_initialized &&
1693 eap_peer_tls_ssl_init(sm, &data->ssl, config)) {
1694 wpa_printf(MSG_INFO, "EAP-TTLS: Failed to initialize SSL.");
1695 return -1;
1696 }
1697 data->ssl_initialized = 1;
1698
1699 wpa_printf(MSG_DEBUG, "EAP-TTLS: Start");
1700
1701 return 0;
1702 }
1703
1704
1705 static int eap_ttls_process_handshake(struct eap_sm *sm,
1706 struct eap_ttls_data *data,
1707 struct eap_method_ret *ret,
1708 u8 identifier,
1709 const u8 *in_data, size_t in_len,
1710 struct wpabuf **out_data)
1711 {
1712 int res;
1713
1714 res = eap_peer_tls_process_helper(sm, &data->ssl, EAP_TYPE_TTLS,
1715 data->ttls_version, identifier,
1716 in_data, in_len, out_data);
1717
1718 if (tls_connection_established(sm->ssl_ctx, data->ssl.conn)) {
1719 wpa_printf(MSG_DEBUG, "EAP-TTLS: TLS done, proceed to "
1720 "Phase 2");
1721 if (data->resuming) {
1722 wpa_printf(MSG_DEBUG, "EAP-TTLS: fast reauth - may "
1723 "skip Phase 2");
1724 ret->decision = DECISION_COND_SUCC;
1725 ret->methodState = METHOD_MAY_CONT;
1726 }
1727 data->phase2_start = 1;
1728 if (data->ttls_version == 0)
1729 eap_ttls_v0_derive_key(sm, data);
1730
1731 if (*out_data == NULL || wpabuf_len(*out_data) == 0) {
1732 if (eap_ttls_decrypt(sm, data, ret, identifier,
1733 NULL, out_data)) {
1734 wpa_printf(MSG_WARNING, "EAP-TTLS: "
1735 "failed to process early "
1736 "start for Phase 2");
1737 }
1738 res = 0;
1739 }
1740 data->resuming = 0;
1741 }
1742
1743 if (res == 2) {
1744 struct wpabuf msg;
1745 /*
1746 * Application data included in the handshake message.
1747 */
1748 wpabuf_free(data->pending_phase2_req);
1749 data->pending_phase2_req = *out_data;
1750 *out_data = NULL;
1751 wpabuf_set(&msg, in_data, in_len);
1752 res = eap_ttls_decrypt(sm, data, ret, identifier, &msg,
1753 out_data);
1754 }
1755
1756 return res;
1757 }
1758
1759
1760 static void eap_ttls_check_auth_status(struct eap_sm *sm,
1761 struct eap_ttls_data *data,
1762 struct eap_method_ret *ret)
1763 {
1764 if (data->ttls_version == 0 && ret->methodState == METHOD_DONE) {
1765 ret->allowNotifications = FALSE;
1766 if (ret->decision == DECISION_UNCOND_SUCC ||
1767 ret->decision == DECISION_COND_SUCC) {
1768 wpa_printf(MSG_DEBUG, "EAP-TTLS: Authentication "
1769 "completed successfully");
1770 data->phase2_success = 1;
1771 #ifdef EAP_TNC
1772 if (!data->ready_for_tnc && !data->tnc_started) {
1773 /*
1774 * TNC may be required as the next
1775 * authentication method within the tunnel.
1776 */
1777 ret->methodState = METHOD_MAY_CONT;
1778 data->ready_for_tnc = 1;
1779 }
1780 #endif /* EAP_TNC */
1781 }
1782 } else if (data->ttls_version == 0 &&
1783 ret->methodState == METHOD_MAY_CONT &&
1784 (ret->decision == DECISION_UNCOND_SUCC ||
1785 ret->decision == DECISION_COND_SUCC)) {
1786 wpa_printf(MSG_DEBUG, "EAP-TTLS: Authentication "
1787 "completed successfully (MAY_CONT)");
1788 data->phase2_success = 1;
1789 }
1790 }
1791
1792
1793 static struct wpabuf * eap_ttls_process(struct eap_sm *sm, void *priv,
1794 struct eap_method_ret *ret,
1795 const struct wpabuf *reqData)
1796 {
1797 size_t left;
1798 int res;
1799 u8 flags, id;
1800 struct wpabuf *resp;
1801 const u8 *pos;
1802 struct eap_ttls_data *data = priv;
1803
1804 pos = eap_peer_tls_process_init(sm, &data->ssl, EAP_TYPE_TTLS, ret,
1805 reqData, &left, &flags);
1806 if (pos == NULL)
1807 return NULL;
1808 id = eap_get_id(reqData);
1809
1810 if (flags & EAP_TLS_FLAGS_START) {
1811 if (eap_ttls_process_start(sm, data, flags, ret) < 0)
1812 return NULL;
1813
1814 /* RFC 5281, Ch. 9.2:
1815 * "This packet MAY contain additional information in the form
1816 * of AVPs, which may provide useful hints to the client"
1817 * For now, ignore any potential extra data.
1818 */
1819 left = 0;
1820 } else if (!data->ssl_initialized) {
1821 wpa_printf(MSG_DEBUG, "EAP-TTLS: First message did not "
1822 "include Start flag");
1823 ret->methodState = METHOD_DONE;
1824 ret->decision = DECISION_FAIL;
1825 ret->allowNotifications = FALSE;
1826 return NULL;
1827 }
1828
1829 resp = NULL;
1830 if (tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
1831 !data->resuming) {
1832 struct wpabuf msg;
1833 wpabuf_set(&msg, pos, left);
1834 res = eap_ttls_decrypt(sm, data, ret, id, &msg, &resp);
1835 } else {
1836 res = eap_ttls_process_handshake(sm, data, ret, id,
1837 pos, left, &resp);
1838 }
1839
1840 eap_ttls_check_auth_status(sm, data, ret);
1841
1842 /* FIX: what about res == -1? Could just move all error processing into
1843 * the other functions and get rid of this res==1 case here. */
1844 if (res == 1) {
1845 wpabuf_free(resp);
1846 return eap_peer_tls_build_ack(id, EAP_TYPE_TTLS,
1847 data->ttls_version);
1848 }
1849 return resp;
1850 }
1851
1852
1853 static Boolean eap_ttls_has_reauth_data(struct eap_sm *sm, void *priv)
1854 {
1855 struct eap_ttls_data *data = priv;
1856 return tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
1857 data->phase2_success;
1858 }
1859
1860
1861 static void eap_ttls_deinit_for_reauth(struct eap_sm *sm, void *priv)
1862 {
1863 struct eap_ttls_data *data = priv;
1864 wpabuf_free(data->pending_phase2_req);
1865 data->pending_phase2_req = NULL;
1866 #ifdef EAP_TNC
1867 data->ready_for_tnc = 0;
1868 data->tnc_started = 0;
1869 #endif /* EAP_TNC */
1870 }
1871
1872
1873 static void * eap_ttls_init_for_reauth(struct eap_sm *sm, void *priv)
1874 {
1875 struct eap_ttls_data *data = priv;
1876 os_free(data->key_data);
1877 data->key_data = NULL;
1878 if (eap_peer_tls_reauth_init(sm, &data->ssl)) {
1879 os_free(data);
1880 return NULL;
1881 }
1882 if (data->phase2_priv && data->phase2_method &&
1883 data->phase2_method->init_for_reauth)
1884 data->phase2_method->init_for_reauth(sm, data->phase2_priv);
1885 data->phase2_start = 0;
1886 data->phase2_success = 0;
1887 data->resuming = 1;
1888 data->reauth = 1;
1889 return priv;
1890 }
1891
1892
1893 static int eap_ttls_get_status(struct eap_sm *sm, void *priv, char *buf,
1894 size_t buflen, int verbose)
1895 {
1896 struct eap_ttls_data *data = priv;
1897 int len, ret;
1898
1899 len = eap_peer_tls_status(sm, &data->ssl, buf, buflen, verbose);
1900 ret = os_snprintf(buf + len, buflen - len,
1901 "EAP-TTLSv%d Phase2 method=",
1902 data->ttls_version);
1903 if (ret < 0 || (size_t) ret >= buflen - len)
1904 return len;
1905 len += ret;
1906 switch (data->phase2_type) {
1907 case EAP_TTLS_PHASE2_EAP:
1908 ret = os_snprintf(buf + len, buflen - len, "EAP-%s\n",
1909 data->phase2_method ?
1910 data->phase2_method->name : "?");
1911 break;
1912 case EAP_TTLS_PHASE2_MSCHAPV2:
1913 ret = os_snprintf(buf + len, buflen - len, "MSCHAPV2\n");
1914 break;
1915 case EAP_TTLS_PHASE2_MSCHAP:
1916 ret = os_snprintf(buf + len, buflen - len, "MSCHAP\n");
1917 break;
1918 case EAP_TTLS_PHASE2_PAP:
1919 ret = os_snprintf(buf + len, buflen - len, "PAP\n");
1920 break;
1921 case EAP_TTLS_PHASE2_CHAP:
1922 ret = os_snprintf(buf + len, buflen - len, "CHAP\n");
1923 break;
1924 default:
1925 ret = 0;
1926 break;
1927 }
1928 if (ret < 0 || (size_t) ret >= buflen - len)
1929 return len;
1930 len += ret;
1931
1932 return len;
1933 }
1934
1935
1936 static Boolean eap_ttls_isKeyAvailable(struct eap_sm *sm, void *priv)
1937 {
1938 struct eap_ttls_data *data = priv;
1939 return data->key_data != NULL && data->phase2_success;
1940 }
1941
1942
1943 static u8 * eap_ttls_getKey(struct eap_sm *sm, void *priv, size_t *len)
1944 {
1945 struct eap_ttls_data *data = priv;
1946 u8 *key;
1947
1948 if (data->key_data == NULL || !data->phase2_success)
1949 return NULL;
1950
1951 key = os_malloc(EAP_TLS_KEY_LEN);
1952 if (key == NULL)
1953 return NULL;
1954
1955 *len = EAP_TLS_KEY_LEN;
1956 os_memcpy(key, data->key_data, EAP_TLS_KEY_LEN);
1957
1958 return key;
1959 }
1960
1961
1962 int eap_peer_ttls_register(void)
1963 {
1964 struct eap_method *eap;
1965 int ret;
1966
1967 eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
1968 EAP_VENDOR_IETF, EAP_TYPE_TTLS, "TTLS");
1969 if (eap == NULL)
1970 return -1;
1971
1972 eap->init = eap_ttls_init;
1973 eap->deinit = eap_ttls_deinit;
1974 eap->process = eap_ttls_process;
1975 eap->isKeyAvailable = eap_ttls_isKeyAvailable;
1976 eap->getKey = eap_ttls_getKey;
1977 eap->get_status = eap_ttls_get_status;
1978 eap->has_reauth_data = eap_ttls_has_reauth_data;
1979 eap->deinit_for_reauth = eap_ttls_deinit_for_reauth;
1980 eap->init_for_reauth = eap_ttls_init_for_reauth;
1981
1982 ret = eap_peer_method_register(eap);
1983 if (ret)
1984 eap_peer_method_free(eap);
1985 return ret;
1986 }