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[netbsd-mini2440.git] / dist / wpa / src / eap_peer / eap_ttls.c
blob3dbed1b6246202c03392ee3641e701a7b2b938ec
1 /*
2 * EAP peer method: EAP-TTLS (draft-ietf-pppext-eap-ttls-03.txt)
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 "eap_peer/eap_i.h"
19 #include "eap_peer/eap_tls_common.h"
20 #include "eap_peer/eap_config.h"
21 #include "ms_funcs.h"
22 #include "sha1.h"
23 #include "eap_common/chap.h"
24 #include "tls.h"
25 #include "mschapv2.h"
26 #include "eap_common/eap_ttls.h"
27
28
29 /* Maximum supported TTLS version
30 * 0 = draft-ietf-pppext-eap-ttls-03.txt / draft-funk-eap-ttls-v0-00.txt
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 sm->mschapv2_full_key = 1;
562 data->phase2_priv = data->phase2_method->init(sm);
563 sm->init_phase2 = 0;
564 sm->mschapv2_full_key = 0;
565 }
566 }
567 if (data->phase2_priv == NULL || data->phase2_method == NULL) {
568 wpa_printf(MSG_INFO, "EAP-TTLS: failed to initialize "
569 "Phase 2 EAP method %d", method);
570 return -1;
571 }
572
573 return eap_ttls_phase2_eap_process(sm, data, ret, hdr, len, resp);
574 }
575
576
577 static int eap_ttls_phase2_request_eap(struct eap_sm *sm,
578 struct eap_ttls_data *data,
579 struct eap_method_ret *ret,
580 struct eap_hdr *hdr,
581 struct wpabuf **resp)
582 {
583 size_t len = be_to_host16(hdr->length);
584 u8 *pos;
585 struct eap_peer_config *config = eap_get_config(sm);
586
587 if (len <= sizeof(struct eap_hdr)) {
588 wpa_printf(MSG_INFO, "EAP-TTLS: too short "
589 "Phase 2 request (len=%lu)", (unsigned long) len);
590 return -1;
591 }
592 pos = (u8 *) (hdr + 1);
593 wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 EAP Request: type=%d", *pos);
594 switch (*pos) {
595 case EAP_TYPE_IDENTITY:
596 *resp = eap_sm_buildIdentity(sm, hdr->identifier, 1);
597 break;
598 default:
599 if (eap_ttls_phase2_request_eap_method(sm, data, ret, hdr, len,
600 *pos, resp) < 0)
601 return -1;
602 break;
603 }
604
605 if (*resp == NULL &&
606 (config->pending_req_identity || config->pending_req_password ||
607 config->pending_req_otp)) {
608 return 0;
609 }
610
611 if (*resp == NULL)
612 return -1;
613
614 wpa_hexdump_buf(MSG_DEBUG, "EAP-TTLS: AVP encapsulate EAP Response",
615 *resp);
616 return eap_ttls_avp_encapsulate(resp, RADIUS_ATTR_EAP_MESSAGE, 1);
617 }
618
619
620 static void eap_ttlsv1_permute_inner(struct eap_sm *sm,
621 struct eap_ttls_data *data)
622 {
623 #if EAP_TTLS_VERSION > 0
624 u8 session_key[2 * MSCHAPV2_KEY_LEN];
625
626 if (data->ttls_version == 0)
627 return;
628
629 get_asymetric_start_key(data->master_key, session_key,
630 MSCHAPV2_KEY_LEN, 0, 0);
631 get_asymetric_start_key(data->master_key,
632 session_key + MSCHAPV2_KEY_LEN,
633 MSCHAPV2_KEY_LEN, 1, 0);
634 eap_ttls_ia_permute_inner_secret(sm, data, session_key,
635 sizeof(session_key));
636 #endif /* EAP_TTLS_VERSION */
637 }
638
639
640 static int eap_ttls_phase2_request_mschapv2(struct eap_sm *sm,
641 struct eap_ttls_data *data,
642 struct eap_method_ret *ret,
643 struct wpabuf **resp)
644 {
645 struct wpabuf *msg;
646 u8 *buf, *pos, *challenge, *peer_challenge;
647 const u8 *identity, *password;
648 size_t identity_len, password_len;
649 int pwhash;
650
651 wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 MSCHAPV2 Request");
652
653 identity = eap_get_config_identity(sm, &identity_len);
654 password = eap_get_config_password2(sm, &password_len, &pwhash);
655 if (identity == NULL || password == NULL)
656 return -1;
657
658 msg = wpabuf_alloc(identity_len + 1000);
659 if (msg == NULL) {
660 wpa_printf(MSG_ERROR,
661 "EAP-TTLS/MSCHAPV2: Failed to allocate memory");
662 return -1;
663 }
664 pos = buf = wpabuf_mhead(msg);
665
666 /* User-Name */
667 pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_USER_NAME, 0, 1,
668 identity, identity_len);
669
670 /* MS-CHAP-Challenge */
671 challenge = eap_ttls_implicit_challenge(
672 sm, data, EAP_TTLS_MSCHAPV2_CHALLENGE_LEN + 1);
673 if (challenge == NULL) {
674 wpabuf_free(msg);
675 wpa_printf(MSG_ERROR, "EAP-TTLS/MSCHAPV2: Failed to derive "
676 "implicit challenge");
677 return -1;
678 }
679 peer_challenge = challenge + 1 + EAP_TTLS_MSCHAPV2_CHALLENGE_LEN;
680
681 pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_MS_CHAP_CHALLENGE,
682 RADIUS_VENDOR_ID_MICROSOFT, 1,
683 challenge, EAP_TTLS_MSCHAPV2_CHALLENGE_LEN);
684
685 /* MS-CHAP2-Response */
686 pos = eap_ttls_avp_hdr(pos, RADIUS_ATTR_MS_CHAP2_RESPONSE,
687 RADIUS_VENDOR_ID_MICROSOFT, 1,
688 EAP_TTLS_MSCHAPV2_RESPONSE_LEN);
689 data->ident = challenge[EAP_TTLS_MSCHAPV2_CHALLENGE_LEN];
690 *pos++ = data->ident;
691 *pos++ = 0; /* Flags */
692 os_memcpy(pos, peer_challenge, EAP_TTLS_MSCHAPV2_CHALLENGE_LEN);
693 pos += EAP_TTLS_MSCHAPV2_CHALLENGE_LEN;
694 os_memset(pos, 0, 8); /* Reserved, must be zero */
695 pos += 8;
696 mschapv2_derive_response(identity, identity_len, password,
697 password_len, pwhash, challenge,
698 peer_challenge, pos, data->auth_response,
699 data->master_key);
700 data->auth_response_valid = 1;
701
702 eap_ttlsv1_permute_inner(sm, data);
703
704 pos += 24;
705 os_free(challenge);
706 AVP_PAD(buf, pos);
707
708 wpabuf_put(msg, pos - buf);
709 *resp = msg;
710
711 if (sm->workaround && data->ttls_version == 0) {
712 /* At least FreeRADIUS seems to be terminating
713 * EAP-TTLS/MSHCAPV2 without the expected MS-CHAP-v2 Success
714 * packet. */
715 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2: EAP workaround - "
716 "allow success without tunneled response");
717 ret->methodState = METHOD_MAY_CONT;
718 ret->decision = DECISION_COND_SUCC;
719 }
720
721 return 0;
722 }
723
724
725 static int eap_ttls_phase2_request_mschap(struct eap_sm *sm,
726 struct eap_ttls_data *data,
727 struct eap_method_ret *ret,
728 struct wpabuf **resp)
729 {
730 struct wpabuf *msg;
731 u8 *buf, *pos, *challenge;
732 const u8 *identity, *password;
733 size_t identity_len, password_len;
734 int pwhash;
735
736 wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 MSCHAP Request");
737
738 identity = eap_get_config_identity(sm, &identity_len);
739 password = eap_get_config_password2(sm, &password_len, &pwhash);
740 if (identity == NULL || password == NULL)
741 return -1;
742
743 msg = wpabuf_alloc(identity_len + 1000);
744 if (msg == NULL) {
745 wpa_printf(MSG_ERROR,
746 "EAP-TTLS/MSCHAP: Failed to allocate memory");
747 return -1;
748 }
749 pos = buf = wpabuf_mhead(msg);
750
751 /* User-Name */
752 pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_USER_NAME, 0, 1,
753 identity, identity_len);
754
755 /* MS-CHAP-Challenge */
756 challenge = eap_ttls_implicit_challenge(
757 sm, data, EAP_TTLS_MSCHAP_CHALLENGE_LEN + 1);
758 if (challenge == NULL) {
759 wpabuf_free(msg);
760 wpa_printf(MSG_ERROR, "EAP-TTLS/MSCHAP: Failed to derive "
761 "implicit challenge");
762 return -1;
763 }
764
765 pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_MS_CHAP_CHALLENGE,
766 RADIUS_VENDOR_ID_MICROSOFT, 1,
767 challenge, EAP_TTLS_MSCHAP_CHALLENGE_LEN);
768
769 /* MS-CHAP-Response */
770 pos = eap_ttls_avp_hdr(pos, RADIUS_ATTR_MS_CHAP_RESPONSE,
771 RADIUS_VENDOR_ID_MICROSOFT, 1,
772 EAP_TTLS_MSCHAP_RESPONSE_LEN);
773 data->ident = challenge[EAP_TTLS_MSCHAP_CHALLENGE_LEN];
774 *pos++ = data->ident;
775 *pos++ = 1; /* Flags: Use NT style passwords */
776 os_memset(pos, 0, 24); /* LM-Response */
777 pos += 24;
778 if (pwhash) {
779 challenge_response(challenge, password, pos); /* NT-Response */
780 wpa_hexdump_key(MSG_DEBUG, "EAP-TTLS: MSCHAP password hash",
781 password, 16);
782 } else {
783 nt_challenge_response(challenge, password, password_len,
784 pos); /* NT-Response */
785 wpa_hexdump_ascii_key(MSG_DEBUG, "EAP-TTLS: MSCHAP password",
786 password, password_len);
787 }
788 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: MSCHAP implicit challenge",
789 challenge, EAP_TTLS_MSCHAP_CHALLENGE_LEN);
790 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: MSCHAP response", pos, 24);
791 pos += 24;
792 os_free(challenge);
793 AVP_PAD(buf, pos);
794
795 wpabuf_put(msg, pos - buf);
796 *resp = msg;
797
798 if (data->ttls_version > 0) {
799 /* EAP-TTLSv1 uses TLS/IA FinalPhaseFinished to report success,
800 * so do not allow connection to be terminated yet. */
801 ret->methodState = METHOD_CONT;
802 ret->decision = DECISION_COND_SUCC;
803 } else {
804 /* EAP-TTLS/MSCHAP does not provide tunneled success
805 * notification, so assume that Phase2 succeeds. */
806 ret->methodState = METHOD_DONE;
807 ret->decision = DECISION_COND_SUCC;
808 }
809
810 return 0;
811 }
812
813
814 static int eap_ttls_phase2_request_pap(struct eap_sm *sm,
815 struct eap_ttls_data *data,
816 struct eap_method_ret *ret,
817 struct wpabuf **resp)
818 {
819 struct wpabuf *msg;
820 u8 *buf, *pos;
821 size_t pad;
822 const u8 *identity, *password;
823 size_t identity_len, password_len;
824
825 wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 PAP Request");
826
827 identity = eap_get_config_identity(sm, &identity_len);
828 password = eap_get_config_password(sm, &password_len);
829 if (identity == NULL || password == NULL)
830 return -1;
831
832 msg = wpabuf_alloc(identity_len + password_len + 100);
833 if (msg == NULL) {
834 wpa_printf(MSG_ERROR,
835 "EAP-TTLS/PAP: Failed to allocate memory");
836 return -1;
837 }
838 pos = buf = wpabuf_mhead(msg);
839
840 /* User-Name */
841 pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_USER_NAME, 0, 1,
842 identity, identity_len);
843
844 /* User-Password; in RADIUS, this is encrypted, but EAP-TTLS encrypts
845 * the data, so no separate encryption is used in the AVP itself.
846 * However, the password is padded to obfuscate its length. */
847 pad = (16 - (password_len & 15)) & 15;
848 pos = eap_ttls_avp_hdr(pos, RADIUS_ATTR_USER_PASSWORD, 0, 1,
849 password_len + pad);
850 os_memcpy(pos, password, password_len);
851 pos += password_len;
852 os_memset(pos, 0, pad);
853 pos += pad;
854 AVP_PAD(buf, pos);
855
856 wpabuf_put(msg, pos - buf);
857 *resp = msg;
858
859 if (data->ttls_version > 0) {
860 /* EAP-TTLSv1 uses TLS/IA FinalPhaseFinished to report success,
861 * so do not allow connection to be terminated yet. */
862 ret->methodState = METHOD_CONT;
863 ret->decision = DECISION_COND_SUCC;
864 } else {
865 /* EAP-TTLS/PAP does not provide tunneled success notification,
866 * so assume that Phase2 succeeds. */
867 ret->methodState = METHOD_DONE;
868 ret->decision = DECISION_COND_SUCC;
869 }
870
871 return 0;
872 }
873
874
875 static int eap_ttls_phase2_request_chap(struct eap_sm *sm,
876 struct eap_ttls_data *data,
877 struct eap_method_ret *ret,
878 struct wpabuf **resp)
879 {
880 struct wpabuf *msg;
881 u8 *buf, *pos, *challenge;
882 const u8 *identity, *password;
883 size_t identity_len, password_len;
884
885 wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 CHAP Request");
886
887 identity = eap_get_config_identity(sm, &identity_len);
888 password = eap_get_config_password(sm, &password_len);
889 if (identity == NULL || password == NULL)
890 return -1;
891
892 msg = wpabuf_alloc(identity_len + 1000);
893 if (msg == NULL) {
894 wpa_printf(MSG_ERROR,
895 "EAP-TTLS/CHAP: Failed to allocate memory");
896 return -1;
897 }
898 pos = buf = wpabuf_mhead(msg);
899
900 /* User-Name */
901 pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_USER_NAME, 0, 1,
902 identity, identity_len);
903
904 /* CHAP-Challenge */
905 challenge = eap_ttls_implicit_challenge(
906 sm, data, EAP_TTLS_CHAP_CHALLENGE_LEN + 1);
907 if (challenge == NULL) {
908 wpabuf_free(msg);
909 wpa_printf(MSG_ERROR, "EAP-TTLS/CHAP: Failed to derive "
910 "implicit challenge");
911 return -1;
912 }
913
914 pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_CHAP_CHALLENGE, 0, 1,
915 challenge, EAP_TTLS_CHAP_CHALLENGE_LEN);
916
917 /* CHAP-Password */
918 pos = eap_ttls_avp_hdr(pos, RADIUS_ATTR_CHAP_PASSWORD, 0, 1,
919 1 + EAP_TTLS_CHAP_PASSWORD_LEN);
920 data->ident = challenge[EAP_TTLS_CHAP_CHALLENGE_LEN];
921 *pos++ = data->ident;
922
923 /* MD5(Ident + Password + Challenge) */
924 chap_md5(data->ident, password, password_len, challenge,
925 EAP_TTLS_CHAP_CHALLENGE_LEN, pos);
926
927 wpa_hexdump_ascii(MSG_DEBUG, "EAP-TTLS: CHAP username",
928 identity, identity_len);
929 wpa_hexdump_ascii_key(MSG_DEBUG, "EAP-TTLS: CHAP password",
930 password, password_len);
931 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: CHAP implicit challenge",
932 challenge, EAP_TTLS_CHAP_CHALLENGE_LEN);
933 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: CHAP password",
934 pos, EAP_TTLS_CHAP_PASSWORD_LEN);
935 pos += EAP_TTLS_CHAP_PASSWORD_LEN;
936 os_free(challenge);
937 AVP_PAD(buf, pos);
938
939 wpabuf_put(msg, pos - buf);
940 *resp = msg;
941
942 if (data->ttls_version > 0) {
943 /* EAP-TTLSv1 uses TLS/IA FinalPhaseFinished to report success,
944 * so do not allow connection to be terminated yet. */
945 ret->methodState = METHOD_CONT;
946 ret->decision = DECISION_COND_SUCC;
947 } else {
948 /* EAP-TTLS/CHAP does not provide tunneled success
949 * notification, so assume that Phase2 succeeds. */
950 ret->methodState = METHOD_DONE;
951 ret->decision = DECISION_COND_SUCC;
952 }
953
954 return 0;
955 }
956
957
958 static int eap_ttls_phase2_request(struct eap_sm *sm,
959 struct eap_ttls_data *data,
960 struct eap_method_ret *ret,
961 struct eap_hdr *hdr,
962 struct wpabuf **resp)
963 {
964 int res = 0;
965 size_t len;
966 enum phase2_types phase2_type = data->phase2_type;
967
968 #ifdef EAP_TNC
969 if (data->tnc_started) {
970 wpa_printf(MSG_DEBUG, "EAP-TTLS: Processing TNC");
971 phase2_type = EAP_TTLS_PHASE2_EAP;
972 }
973 #endif /* EAP_TNC */
974
975 if (phase2_type == EAP_TTLS_PHASE2_MSCHAPV2 ||
976 phase2_type == EAP_TTLS_PHASE2_MSCHAP ||
977 phase2_type == EAP_TTLS_PHASE2_PAP ||
978 phase2_type == EAP_TTLS_PHASE2_CHAP) {
979 if (eap_get_config_identity(sm, &len) == NULL) {
980 wpa_printf(MSG_INFO,
981 "EAP-TTLS: Identity not configured");
982 eap_sm_request_identity(sm);
983 if (eap_get_config_password(sm, &len) == NULL)
984 eap_sm_request_password(sm);
985 return 0;
986 }
987
988 if (eap_get_config_password(sm, &len) == NULL) {
989 wpa_printf(MSG_INFO,
990 "EAP-TTLS: Password not configured");
991 eap_sm_request_password(sm);
992 return 0;
993 }
994 }
995
996 switch (phase2_type) {
997 case EAP_TTLS_PHASE2_EAP:
998 res = eap_ttls_phase2_request_eap(sm, data, ret, hdr, resp);
999 break;
1000 case EAP_TTLS_PHASE2_MSCHAPV2:
1001 res = eap_ttls_phase2_request_mschapv2(sm, data, ret, resp);
1002 break;
1003 case EAP_TTLS_PHASE2_MSCHAP:
1004 res = eap_ttls_phase2_request_mschap(sm, data, ret, resp);
1005 break;
1006 case EAP_TTLS_PHASE2_PAP:
1007 res = eap_ttls_phase2_request_pap(sm, data, ret, resp);
1008 break;
1009 case EAP_TTLS_PHASE2_CHAP:
1010 res = eap_ttls_phase2_request_chap(sm, data, ret, resp);
1011 break;
1012 default:
1013 wpa_printf(MSG_ERROR, "EAP-TTLS: Phase 2 - Unknown");
1014 res = -1;
1015 break;
1016 }
1017
1018 if (res < 0) {
1019 ret->methodState = METHOD_DONE;
1020 ret->decision = DECISION_FAIL;
1021 }
1022
1023 return res;
1024 }
1025
1026
1027 #if EAP_TTLS_VERSION > 0
1028 static struct wpabuf * eap_ttls_build_phase_finished(
1029 struct eap_sm *sm, struct eap_ttls_data *data, int id, int final)
1030 {
1031 int len;
1032 struct wpabuf *req;
1033 u8 *pos;
1034 const int max_len = 300;
1035
1036 req = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_TTLS, 1 + max_len,
1037 EAP_CODE_RESPONSE, id);
1038 if (req == NULL)
1039 return NULL;
1040
1041 wpabuf_put_u8(req, data->ttls_version);
1042
1043 pos = wpabuf_put(req, 0);
1044 len = tls_connection_ia_send_phase_finished(sm->ssl_ctx,
1045 data->ssl.conn,
1046 final, pos, max_len);
1047 if (len < 0) {
1048 wpabuf_free(req);
1049 return NULL;
1050 }
1051 wpabuf_put(req, len);
1052 eap_update_len(req);
1053
1054 return req;
1055 }
1056 #endif /* EAP_TTLS_VERSION */
1057
1058
1059 struct ttls_parse_avp {
1060 u8 *mschapv2;
1061 u8 *eapdata;
1062 size_t eap_len;
1063 int mschapv2_error;
1064 };
1065
1066
1067 static int eap_ttls_parse_attr_eap(const u8 *dpos, size_t dlen,
1068 struct ttls_parse_avp *parse)
1069 {
1070 wpa_printf(MSG_DEBUG, "EAP-TTLS: AVP - EAP Message");
1071 if (parse->eapdata == NULL) {
1072 parse->eapdata = os_malloc(dlen);
1073 if (parse->eapdata == NULL) {
1074 wpa_printf(MSG_WARNING, "EAP-TTLS: Failed to allocate "
1075 "memory for Phase 2 EAP data");
1076 return -1;
1077 }
1078 os_memcpy(parse->eapdata, dpos, dlen);
1079 parse->eap_len = dlen;
1080 } else {
1081 u8 *neweap = os_realloc(parse->eapdata, parse->eap_len + dlen);
1082 if (neweap == NULL) {
1083 wpa_printf(MSG_WARNING, "EAP-TTLS: Failed to allocate "
1084 "memory for Phase 2 EAP data");
1085 return -1;
1086 }
1087 os_memcpy(neweap + parse->eap_len, dpos, dlen);
1088 parse->eapdata = neweap;
1089 parse->eap_len += dlen;
1090 }
1091
1092 return 0;
1093 }
1094
1095
1096 static int eap_ttls_parse_avp(u8 *pos, size_t left,
1097 struct ttls_parse_avp *parse)
1098 {
1099 struct ttls_avp *avp;
1100 u32 avp_code, avp_length, vendor_id = 0;
1101 u8 avp_flags, *dpos;
1102 size_t dlen;
1103
1104 avp = (struct ttls_avp *) pos;
1105 avp_code = be_to_host32(avp->avp_code);
1106 avp_length = be_to_host32(avp->avp_length);
1107 avp_flags = (avp_length >> 24) & 0xff;
1108 avp_length &= 0xffffff;
1109 wpa_printf(MSG_DEBUG, "EAP-TTLS: AVP: code=%d flags=0x%02x "
1110 "length=%d", (int) avp_code, avp_flags,
1111 (int) avp_length);
1112
1113 if (avp_length > left) {
1114 wpa_printf(MSG_WARNING, "EAP-TTLS: AVP overflow "
1115 "(len=%d, left=%lu) - dropped",
1116 (int) avp_length, (unsigned long) left);
1117 return -1;
1118 }
1119
1120 if (avp_length < sizeof(*avp)) {
1121 wpa_printf(MSG_WARNING, "EAP-TTLS: Invalid AVP length %d",
1122 avp_length);
1123 return -1;
1124 }
1125
1126 dpos = (u8 *) (avp + 1);
1127 dlen = avp_length - sizeof(*avp);
1128 if (avp_flags & AVP_FLAGS_VENDOR) {
1129 if (dlen < 4) {
1130 wpa_printf(MSG_WARNING, "EAP-TTLS: Vendor AVP "
1131 "underflow");
1132 return -1;
1133 }
1134 vendor_id = WPA_GET_BE32(dpos);
1135 wpa_printf(MSG_DEBUG, "EAP-TTLS: AVP vendor_id %d",
1136 (int) vendor_id);
1137 dpos += 4;
1138 dlen -= 4;
1139 }
1140
1141 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: AVP data", dpos, dlen);
1142
1143 if (vendor_id == 0 && avp_code == RADIUS_ATTR_EAP_MESSAGE) {
1144 if (eap_ttls_parse_attr_eap(dpos, dlen, parse) < 0)
1145 return -1;
1146 } else if (vendor_id == 0 && avp_code == RADIUS_ATTR_REPLY_MESSAGE) {
1147 /* This is an optional message that can be displayed to
1148 * the user. */
1149 wpa_hexdump_ascii(MSG_DEBUG, "EAP-TTLS: AVP - Reply-Message",
1150 dpos, dlen);
1151 } else if (vendor_id == RADIUS_VENDOR_ID_MICROSOFT &&
1152 avp_code == RADIUS_ATTR_MS_CHAP2_SUCCESS) {
1153 wpa_hexdump_ascii(MSG_DEBUG, "EAP-TTLS: MS-CHAP2-Success",
1154 dpos, dlen);
1155 if (dlen != 43) {
1156 wpa_printf(MSG_WARNING, "EAP-TTLS: Unexpected "
1157 "MS-CHAP2-Success length "
1158 "(len=%lu, expected 43)",
1159 (unsigned long) dlen);
1160 return -1;
1161 }
1162 parse->mschapv2 = dpos;
1163 } else if (vendor_id == RADIUS_VENDOR_ID_MICROSOFT &&
1164 avp_code == RADIUS_ATTR_MS_CHAP_ERROR) {
1165 wpa_hexdump_ascii(MSG_DEBUG, "EAP-TTLS: MS-CHAP-Error",
1166 dpos, dlen);
1167 parse->mschapv2_error = 1;
1168 } else if (avp_flags & AVP_FLAGS_MANDATORY) {
1169 wpa_printf(MSG_WARNING, "EAP-TTLS: Unsupported mandatory AVP "
1170 "code %d vendor_id %d - dropped",
1171 (int) avp_code, (int) vendor_id);
1172 return -1;
1173 } else {
1174 wpa_printf(MSG_DEBUG, "EAP-TTLS: Ignoring unsupported AVP "
1175 "code %d vendor_id %d",
1176 (int) avp_code, (int) vendor_id);
1177 }
1178
1179 return avp_length;
1180 }
1181
1182
1183 static int eap_ttls_parse_avps(struct wpabuf *in_decrypted,
1184 struct ttls_parse_avp *parse)
1185 {
1186 u8 *pos;
1187 size_t left, pad;
1188 int avp_length;
1189
1190 pos = wpabuf_mhead(in_decrypted);
1191 left = wpabuf_len(in_decrypted);
1192 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: Decrypted Phase 2 AVPs", pos, left);
1193 if (left < sizeof(struct ttls_avp)) {
1194 wpa_printf(MSG_WARNING, "EAP-TTLS: Too short Phase 2 AVP frame"
1195 " len=%lu expected %lu or more - dropped",
1196 (unsigned long) left,
1197 (unsigned long) sizeof(struct ttls_avp));
1198 return -1;
1199 }
1200
1201 /* Parse AVPs */
1202 os_memset(parse, 0, sizeof(*parse));
1203
1204 while (left > 0) {
1205 avp_length = eap_ttls_parse_avp(pos, left, parse);
1206 if (avp_length < 0)
1207 return -1;
1208
1209 pad = (4 - (avp_length & 3)) & 3;
1210 pos += avp_length + pad;
1211 if (left < avp_length + pad)
1212 left = 0;
1213 else
1214 left -= avp_length + pad;
1215 }
1216
1217 return 0;
1218 }
1219
1220
1221 static u8 * eap_ttls_fake_identity_request(void)
1222 {
1223 struct eap_hdr *hdr;
1224 u8 *buf;
1225
1226 wpa_printf(MSG_DEBUG, "EAP-TTLS: empty data in beginning of "
1227 "Phase 2 - use fake EAP-Request Identity");
1228 buf = os_malloc(sizeof(*hdr) + 1);
1229 if (buf == NULL) {
1230 wpa_printf(MSG_WARNING, "EAP-TTLS: failed to allocate "
1231 "memory for fake EAP-Identity Request");
1232 return NULL;
1233 }
1234
1235 hdr = (struct eap_hdr *) buf;
1236 hdr->code = EAP_CODE_REQUEST;
1237 hdr->identifier = 0;
1238 hdr->length = host_to_be16(sizeof(*hdr) + 1);
1239 buf[sizeof(*hdr)] = EAP_TYPE_IDENTITY;
1240
1241 return buf;
1242 }
1243
1244
1245 static int eap_ttls_encrypt_response(struct eap_sm *sm,
1246 struct eap_ttls_data *data,
1247 struct wpabuf *resp, u8 identifier,
1248 struct wpabuf **out_data)
1249 {
1250 if (resp == NULL)
1251 return 0;
1252
1253 wpa_hexdump_buf_key(MSG_DEBUG, "EAP-TTLS: Encrypting Phase 2 data",
1254 resp);
1255 if (eap_peer_tls_encrypt(sm, &data->ssl, EAP_TYPE_TTLS,
1256 data->ttls_version, identifier,
1257 resp, out_data)) {
1258 wpa_printf(MSG_INFO, "EAP-TTLS: Failed to encrypt a Phase 2 "
1259 "frame");
1260 return -1;
1261 }
1262 wpabuf_free(resp);
1263
1264 return 0;
1265 }
1266
1267
1268 static int eap_ttls_process_phase2_eap(struct eap_sm *sm,
1269 struct eap_ttls_data *data,
1270 struct eap_method_ret *ret,
1271 struct ttls_parse_avp *parse,
1272 struct wpabuf **resp)
1273 {
1274 struct eap_hdr *hdr;
1275 size_t len;
1276
1277 if (parse->eapdata == NULL) {
1278 wpa_printf(MSG_WARNING, "EAP-TTLS: No EAP Message in the "
1279 "packet - dropped");
1280 return -1;
1281 }
1282
1283 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: Phase 2 EAP",
1284 parse->eapdata, parse->eap_len);
1285 hdr = (struct eap_hdr *) parse->eapdata;
1286
1287 if (parse->eap_len < sizeof(*hdr)) {
1288 wpa_printf(MSG_WARNING, "EAP-TTLS: Too short Phase 2 EAP "
1289 "frame (len=%lu, expected %lu or more) - dropped",
1290 (unsigned long) parse->eap_len,
1291 (unsigned long) sizeof(*hdr));
1292 return -1;
1293 }
1294 len = be_to_host16(hdr->length);
1295 if (len > parse->eap_len) {
1296 wpa_printf(MSG_INFO, "EAP-TTLS: Length mismatch in Phase 2 "
1297 "EAP frame (EAP hdr len=%lu, EAP data len in "
1298 "AVP=%lu)",
1299 (unsigned long) len,
1300 (unsigned long) parse->eap_len);
1301 return -1;
1302 }
1303 wpa_printf(MSG_DEBUG, "EAP-TTLS: received Phase 2: code=%d "
1304 "identifier=%d length=%lu",
1305 hdr->code, hdr->identifier, (unsigned long) len);
1306 switch (hdr->code) {
1307 case EAP_CODE_REQUEST:
1308 if (eap_ttls_phase2_request(sm, data, ret, hdr, resp)) {
1309 wpa_printf(MSG_INFO, "EAP-TTLS: Phase2 Request "
1310 "processing failed");
1311 return -1;
1312 }
1313 break;
1314 default:
1315 wpa_printf(MSG_INFO, "EAP-TTLS: Unexpected code=%d in "
1316 "Phase 2 EAP header", hdr->code);
1317 return -1;
1318 }
1319
1320 return 0;
1321 }
1322
1323
1324 static int eap_ttls_process_phase2_mschapv2(struct eap_sm *sm,
1325 struct eap_ttls_data *data,
1326 struct eap_method_ret *ret,
1327 struct ttls_parse_avp *parse)
1328 {
1329 if (parse->mschapv2_error) {
1330 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2: Received "
1331 "MS-CHAP-Error - failed");
1332 ret->methodState = METHOD_DONE;
1333 ret->decision = DECISION_FAIL;
1334 /* Reply with empty data to ACK error */
1335 return 1;
1336 }
1337
1338 if (parse->mschapv2 == NULL) {
1339 #ifdef EAP_TNC
1340 if (data->phase2_success && parse->eapdata) {
1341 /*
1342 * Allow EAP-TNC to be started after successfully
1343 * completed MSCHAPV2.
1344 */
1345 return 1;
1346 }
1347 #endif /* EAP_TNC */
1348 wpa_printf(MSG_WARNING, "EAP-TTLS: no MS-CHAP2-Success AVP "
1349 "received for Phase2 MSCHAPV2");
1350 return -1;
1351 }
1352 if (parse->mschapv2[0] != data->ident) {
1353 wpa_printf(MSG_WARNING, "EAP-TTLS: Ident mismatch for Phase 2 "
1354 "MSCHAPV2 (received Ident 0x%02x, expected 0x%02x)",
1355 parse->mschapv2[0], data->ident);
1356 return -1;
1357 }
1358 if (!data->auth_response_valid ||
1359 mschapv2_verify_auth_response(data->auth_response,
1360 parse->mschapv2 + 1, 42)) {
1361 wpa_printf(MSG_WARNING, "EAP-TTLS: Invalid authenticator "
1362 "response in Phase 2 MSCHAPV2 success request");
1363 return -1;
1364 }
1365
1366 wpa_printf(MSG_INFO, "EAP-TTLS: Phase 2 MSCHAPV2 "
1367 "authentication succeeded");
1368 if (data->ttls_version > 0) {
1369 /*
1370 * EAP-TTLSv1 uses TLS/IA FinalPhaseFinished to report
1371 * success, so do not allow connection to be terminated
1372 * yet.
1373 */
1374 ret->methodState = METHOD_CONT;
1375 ret->decision = DECISION_COND_SUCC;
1376 } else {
1377 ret->methodState = METHOD_DONE;
1378 ret->decision = DECISION_UNCOND_SUCC;
1379 data->phase2_success = 1;
1380 }
1381
1382 /*
1383 * Reply with empty data; authentication server will reply
1384 * with EAP-Success after this.
1385 */
1386 return 1;
1387 }
1388
1389
1390 #ifdef EAP_TNC
1391 static int eap_ttls_process_tnc_start(struct eap_sm *sm,
1392 struct eap_ttls_data *data,
1393 struct eap_method_ret *ret,
1394 struct ttls_parse_avp *parse,
1395 struct wpabuf **resp)
1396 {
1397 /* TNC uses inner EAP method after non-EAP TTLS phase 2. */
1398 if (parse->eapdata == NULL) {
1399 wpa_printf(MSG_INFO, "EAP-TTLS: Phase 2 received "
1400 "unexpected tunneled data (no EAP)");
1401 return -1;
1402 }
1403
1404 if (!data->ready_for_tnc) {
1405 wpa_printf(MSG_INFO, "EAP-TTLS: Phase 2 received "
1406 "EAP after non-EAP, but not ready for TNC");
1407 return -1;
1408 }
1409
1410 wpa_printf(MSG_DEBUG, "EAP-TTLS: Start TNC after completed "
1411 "non-EAP method");
1412 data->tnc_started = 1;
1413
1414 if (eap_ttls_process_phase2_eap(sm, data, ret, parse, resp) < 0)
1415 return -1;
1416
1417 return 0;
1418 }
1419 #endif /* EAP_TNC */
1420
1421
1422 static int eap_ttls_process_decrypted(struct eap_sm *sm,
1423 struct eap_ttls_data *data,
1424 struct eap_method_ret *ret,
1425 u8 identifier,
1426 struct ttls_parse_avp *parse,
1427 struct wpabuf *in_decrypted,
1428 struct wpabuf **out_data)
1429 {
1430 struct wpabuf *resp = NULL;
1431 struct eap_peer_config *config = eap_get_config(sm);
1432 int res;
1433 enum phase2_types phase2_type = data->phase2_type;
1434
1435 #ifdef EAP_TNC
1436 if (data->tnc_started)
1437 phase2_type = EAP_TTLS_PHASE2_EAP;
1438 #endif /* EAP_TNC */
1439
1440 switch (phase2_type) {
1441 case EAP_TTLS_PHASE2_EAP:
1442 if (eap_ttls_process_phase2_eap(sm, data, ret, parse, &resp) <
1443 0)
1444 return -1;
1445 break;
1446 case EAP_TTLS_PHASE2_MSCHAPV2:
1447 res = eap_ttls_process_phase2_mschapv2(sm, data, ret, parse);
1448 #ifdef EAP_TNC
1449 if (res == 1 && parse->eapdata && data->phase2_success) {
1450 /*
1451 * TNC may be required as the next
1452 * authentication method within the tunnel.
1453 */
1454 ret->methodState = METHOD_MAY_CONT;
1455 data->ready_for_tnc = 1;
1456 if (eap_ttls_process_tnc_start(sm, data, ret, parse,
1457 &resp) == 0)
1458 break;
1459 }
1460 #endif /* EAP_TNC */
1461 return res;
1462 case EAP_TTLS_PHASE2_MSCHAP:
1463 case EAP_TTLS_PHASE2_PAP:
1464 case EAP_TTLS_PHASE2_CHAP:
1465 #ifdef EAP_TNC
1466 if (eap_ttls_process_tnc_start(sm, data, ret, parse, &resp) <
1467 0)
1468 return -1;
1469 break;
1470 #else /* EAP_TNC */
1471 /* EAP-TTLS/{MSCHAP,PAP,CHAP} should not send any TLS tunneled
1472 * requests to the supplicant */
1473 wpa_printf(MSG_INFO, "EAP-TTLS: Phase 2 received unexpected "
1474 "tunneled data");
1475 return -1;
1476 #endif /* EAP_TNC */
1477 }
1478
1479 if (resp) {
1480 if (eap_ttls_encrypt_response(sm, data, resp, identifier,
1481 out_data) < 0)
1482 return -1;
1483 } else if (config->pending_req_identity ||
1484 config->pending_req_password ||
1485 config->pending_req_otp ||
1486 config->pending_req_new_password) {
1487 wpabuf_free(data->pending_phase2_req);
1488 data->pending_phase2_req = wpabuf_dup(in_decrypted);
1489 }
1490
1491 return 0;
1492 }
1493
1494
1495 #if EAP_TTLS_VERSION > 0
1496 static void eap_ttls_final_phase_finished(struct eap_sm *sm,
1497 struct eap_ttls_data *data,
1498 struct eap_method_ret *ret,
1499 u8 identifier,
1500 struct wpabuf **out_data)
1501 {
1502 wpa_printf(MSG_DEBUG, "EAP-TTLS: FinalPhaseFinished received");
1503 wpa_printf(MSG_INFO, "EAP-TTLS: TLS/IA authentication succeeded");
1504 ret->methodState = METHOD_DONE;
1505 ret->decision = DECISION_UNCOND_SUCC;
1506 data->phase2_success = 1;
1507 *out_data = eap_ttls_build_phase_finished(sm, data, identifier, 1);
1508 eap_ttls_v1_derive_key(sm, data);
1509 }
1510 #endif /* EAP_TTLS_VERSION */
1511
1512
1513 static int eap_ttls_implicit_identity_request(struct eap_sm *sm,
1514 struct eap_ttls_data *data,
1515 struct eap_method_ret *ret,
1516 u8 identifier,
1517 struct wpabuf **out_data)
1518 {
1519 int retval = 0;
1520 struct eap_hdr *hdr;
1521 struct wpabuf *resp;
1522
1523 hdr = (struct eap_hdr *) eap_ttls_fake_identity_request();
1524 if (hdr == NULL) {
1525 ret->methodState = METHOD_DONE;
1526 ret->decision = DECISION_FAIL;
1527 return -1;
1528 }
1529
1530 resp = NULL;
1531 if (eap_ttls_phase2_request(sm, data, ret, hdr, &resp)) {
1532 wpa_printf(MSG_INFO, "EAP-TTLS: Phase2 Request "
1533 "processing failed");
1534 retval = -1;
1535 } else {
1536 retval = eap_ttls_encrypt_response(sm, data, resp, identifier,
1537 out_data);
1538 }
1539
1540 os_free(hdr);
1541
1542 if (retval < 0) {
1543 ret->methodState = METHOD_DONE;
1544 ret->decision = DECISION_FAIL;
1545 }
1546
1547 return retval;
1548 }
1549
1550
1551 static int eap_ttls_phase2_start(struct eap_sm *sm, struct eap_ttls_data *data,
1552 struct eap_method_ret *ret, u8 identifier,
1553 struct wpabuf **out_data)
1554 {
1555 data->phase2_start = 0;
1556
1557 /*
1558 * EAP-TTLS does not use Phase2 on fast re-auth; this must be done only
1559 * if TLS part was indeed resuming a previous session. Most
1560 * Authentication Servers terminate EAP-TTLS before reaching this
1561 * point, but some do not. Make wpa_supplicant stop phase 2 here, if
1562 * needed.
1563 */
1564 if (data->reauth &&
1565 tls_connection_resumed(sm->ssl_ctx, data->ssl.conn)) {
1566 wpa_printf(MSG_DEBUG, "EAP-TTLS: Session resumption - "
1567 "skip phase 2");
1568 *out_data = eap_peer_tls_build_ack(identifier, EAP_TYPE_TTLS,
1569 data->ttls_version);
1570 ret->methodState = METHOD_DONE;
1571 ret->decision = DECISION_UNCOND_SUCC;
1572 data->phase2_success = 1;
1573 return 0;
1574 }
1575
1576 return eap_ttls_implicit_identity_request(sm, data, ret, identifier,
1577 out_data);
1578 }
1579
1580
1581 static int eap_ttls_decrypt(struct eap_sm *sm, struct eap_ttls_data *data,
1582 struct eap_method_ret *ret, u8 identifier,
1583 const struct wpabuf *in_data,
1584 struct wpabuf **out_data)
1585 {
1586 struct wpabuf *in_decrypted = NULL;
1587 int retval = 0;
1588 struct ttls_parse_avp parse;
1589
1590 os_memset(&parse, 0, sizeof(parse));
1591
1592 wpa_printf(MSG_DEBUG, "EAP-TTLS: received %lu bytes encrypted data for"
1593 " Phase 2",
1594 in_data ? (unsigned long) wpabuf_len(in_data) : 0);
1595
1596 if (data->pending_phase2_req) {
1597 wpa_printf(MSG_DEBUG, "EAP-TTLS: Pending Phase 2 request - "
1598 "skip decryption and use old data");
1599 /* Clear TLS reassembly state. */
1600 eap_peer_tls_reset_input(&data->ssl);
1601
1602 in_decrypted = data->pending_phase2_req;
1603 data->pending_phase2_req = NULL;
1604 if (wpabuf_len(in_decrypted) == 0) {
1605 wpabuf_free(in_decrypted);
1606 return eap_ttls_implicit_identity_request(
1607 sm, data, ret, identifier, out_data);
1608 }
1609 goto continue_req;
1610 }
1611
1612 if ((in_data == NULL || wpabuf_len(in_data) == 0) &&
1613 data->phase2_start) {
1614 return eap_ttls_phase2_start(sm, data, ret, identifier,
1615 out_data);
1616 }
1617
1618 if (in_data == NULL || wpabuf_len(in_data) == 0) {
1619 /* Received TLS ACK - requesting more fragments */
1620 return eap_peer_tls_encrypt(sm, &data->ssl, EAP_TYPE_TTLS,
1621 data->ttls_version,
1622 identifier, NULL, out_data);
1623 }
1624
1625 retval = eap_peer_tls_decrypt(sm, &data->ssl, in_data, &in_decrypted);
1626 if (retval)
1627 goto done;
1628
1629 #if EAP_TTLS_VERSION > 0
1630 if (data->ttls_version > 0 &&
1631 (in_decrypted == NULL || wpabuf_len(in_decrypted) == 0) &&
1632 tls_connection_ia_final_phase_finished(sm->ssl_ctx,
1633 data->ssl.conn)) {
1634 eap_ttls_final_phase_finished(sm, data, ret, identifier,
1635 out_data);
1636 goto done;
1637 }
1638 #endif /* EAP_TTLS_VERSION */
1639
1640 continue_req:
1641 data->phase2_start = 0;
1642
1643 if (eap_ttls_parse_avps(in_decrypted, &parse) < 0) {
1644 retval = -1;
1645 goto done;
1646 }
1647
1648 retval = eap_ttls_process_decrypted(sm, data, ret, identifier,
1649 &parse, in_decrypted, out_data);
1650
1651 done:
1652 wpabuf_free(in_decrypted);
1653 os_free(parse.eapdata);
1654
1655 if (retval < 0) {
1656 ret->methodState = METHOD_DONE;
1657 ret->decision = DECISION_FAIL;
1658 }
1659
1660 return retval;
1661 }
1662
1663
1664 static int eap_ttls_process_start(struct eap_sm *sm,
1665 struct eap_ttls_data *data, u8 flags,
1666 struct eap_method_ret *ret)
1667 {
1668 struct eap_peer_config *config = eap_get_config(sm);
1669
1670 wpa_printf(MSG_DEBUG, "EAP-TTLS: Start (server ver=%d, own ver=%d)",
1671 flags & EAP_PEAP_VERSION_MASK, data->ttls_version);
1672 #if EAP_TTLS_VERSION > 0
1673 if ((flags & EAP_PEAP_VERSION_MASK) < data->ttls_version)
1674 data->ttls_version = flags & EAP_PEAP_VERSION_MASK;
1675 if (data->force_ttls_version >= 0 &&
1676 data->force_ttls_version != data->ttls_version) {
1677 wpa_printf(MSG_WARNING, "EAP-TTLS: Failed to select "
1678 "forced TTLS version %d",
1679 data->force_ttls_version);
1680 ret->methodState = METHOD_DONE;
1681 ret->decision = DECISION_FAIL;
1682 ret->allowNotifications = FALSE;
1683 return -1;
1684 }
1685 wpa_printf(MSG_DEBUG, "EAP-TTLS: Using TTLS version %d",
1686 data->ttls_version);
1687
1688 if (data->ttls_version > 0)
1689 data->ssl.tls_ia = 1;
1690 #endif /* EAP_TTLS_VERSION */
1691 if (!data->ssl_initialized &&
1692 eap_peer_tls_ssl_init(sm, &data->ssl, config)) {
1693 wpa_printf(MSG_INFO, "EAP-TTLS: Failed to initialize SSL.");
1694 return -1;
1695 }
1696 data->ssl_initialized = 1;
1697
1698 wpa_printf(MSG_DEBUG, "EAP-TTLS: Start");
1699
1700 return 0;
1701 }
1702
1703
1704 static int eap_ttls_process_handshake(struct eap_sm *sm,
1705 struct eap_ttls_data *data,
1706 struct eap_method_ret *ret,
1707 u8 identifier,
1708 const u8 *in_data, size_t in_len,
1709 struct wpabuf **out_data)
1710 {
1711 int res;
1712
1713 res = eap_peer_tls_process_helper(sm, &data->ssl, EAP_TYPE_TTLS,
1714 data->ttls_version, identifier,
1715 in_data, in_len, out_data);
1716
1717 if (tls_connection_established(sm->ssl_ctx, data->ssl.conn)) {
1718 wpa_printf(MSG_DEBUG, "EAP-TTLS: TLS done, proceed to "
1719 "Phase 2");
1720 if (data->resuming) {
1721 wpa_printf(MSG_DEBUG, "EAP-TTLS: fast reauth - may "
1722 "skip Phase 2");
1723 ret->decision = DECISION_COND_SUCC;
1724 ret->methodState = METHOD_MAY_CONT;
1725 }
1726 data->phase2_start = 1;
1727 if (data->ttls_version == 0)
1728 eap_ttls_v0_derive_key(sm, data);
1729
1730 if (*out_data == NULL || wpabuf_len(*out_data) == 0) {
1731 if (eap_ttls_decrypt(sm, data, ret, identifier,
1732 NULL, out_data)) {
1733 wpa_printf(MSG_WARNING, "EAP-TTLS: "
1734 "failed to process early "
1735 "start for Phase 2");
1736 }
1737 res = 0;
1738 }
1739 data->resuming = 0;
1740 }
1741
1742 if (res == 2) {
1743 struct wpabuf msg;
1744 /*
1745 * Application data included in the handshake message.
1746 */
1747 wpabuf_free(data->pending_phase2_req);
1748 data->pending_phase2_req = *out_data;
1749 *out_data = NULL;
1750 wpabuf_set(&msg, in_data, in_len);
1751 res = eap_ttls_decrypt(sm, data, ret, identifier, &msg,
1752 out_data);
1753 }
1754
1755 return res;
1756 }
1757
1758
1759 static void eap_ttls_check_auth_status(struct eap_sm *sm,
1760 struct eap_ttls_data *data,
1761 struct eap_method_ret *ret)
1762 {
1763 if (data->ttls_version == 0 && ret->methodState == METHOD_DONE) {
1764 ret->allowNotifications = FALSE;
1765 if (ret->decision == DECISION_UNCOND_SUCC ||
1766 ret->decision == DECISION_COND_SUCC) {
1767 wpa_printf(MSG_DEBUG, "EAP-TTLS: Authentication "
1768 "completed successfully");
1769 data->phase2_success = 1;
1770 #ifdef EAP_TNC
1771 if (!data->ready_for_tnc && !data->tnc_started) {
1772 /*
1773 * TNC may be required as the next
1774 * authentication method within the tunnel.
1775 */
1776 ret->methodState = METHOD_MAY_CONT;
1777 data->ready_for_tnc = 1;
1778 }
1779 #endif /* EAP_TNC */
1780 }
1781 } else if (data->ttls_version == 0 &&
1782 ret->methodState == METHOD_MAY_CONT &&
1783 (ret->decision == DECISION_UNCOND_SUCC ||
1784 ret->decision == DECISION_COND_SUCC)) {
1785 wpa_printf(MSG_DEBUG, "EAP-TTLS: Authentication "
1786 "completed successfully (MAY_CONT)");
1787 data->phase2_success = 1;
1788 }
1789 }
1790
1791
1792 static struct wpabuf * eap_ttls_process(struct eap_sm *sm, void *priv,
1793 struct eap_method_ret *ret,
1794 const struct wpabuf *reqData)
1795 {
1796 size_t left;
1797 int res;
1798 u8 flags, id;
1799 struct wpabuf *resp;
1800 const u8 *pos;
1801 struct eap_ttls_data *data = priv;
1802
1803 pos = eap_peer_tls_process_init(sm, &data->ssl, EAP_TYPE_TTLS, ret,
1804 reqData, &left, &flags);
1805 if (pos == NULL)
1806 return NULL;
1807 id = eap_get_id(reqData);
1808
1809 if (flags & EAP_TLS_FLAGS_START) {
1810 if (eap_ttls_process_start(sm, data, flags, ret) < 0)
1811 return NULL;
1812
1813 /* draft-ietf-pppext-eap-ttls-03.txt, Ch. 8.1:
1814 * EAP-TTLS Start packet may, in a future specification, be
1815 * allowed to contain data. Client based on this draft version
1816 * must ignore such data but must not reject the Start packet.
1817 */
1818 left = 0;
1819 } else if (!data->ssl_initialized) {
1820 wpa_printf(MSG_DEBUG, "EAP-TTLS: First message did not "
1821 "include Start flag");
1822 ret->methodState = METHOD_DONE;
1823 ret->decision = DECISION_FAIL;
1824 ret->allowNotifications = FALSE;
1825 return NULL;
1826 }
1827
1828 resp = NULL;
1829 if (tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
1830 !data->resuming) {
1831 struct wpabuf msg;
1832 wpabuf_set(&msg, pos, left);
1833 res = eap_ttls_decrypt(sm, data, ret, id, &msg, &resp);
1834 } else {
1835 res = eap_ttls_process_handshake(sm, data, ret, id,
1836 pos, left, &resp);
1837 }
1838
1839 eap_ttls_check_auth_status(sm, data, ret);
1840
1841 /* FIX: what about res == -1? Could just move all error processing into
1842 * the other functions and get rid of this res==1 case here. */
1843 if (res == 1) {
1844 wpabuf_free(resp);
1845 return eap_peer_tls_build_ack(id, EAP_TYPE_TTLS,
1846 data->ttls_version);
1847 }
1848 return resp;
1849 }
1850
1851
1852 static Boolean eap_ttls_has_reauth_data(struct eap_sm *sm, void *priv)
1853 {
1854 struct eap_ttls_data *data = priv;
1855 return tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
1856 data->phase2_success;
1857 }
1858
1859
1860 static void eap_ttls_deinit_for_reauth(struct eap_sm *sm, void *priv)
1861 {
1862 struct eap_ttls_data *data = priv;
1863 wpabuf_free(data->pending_phase2_req);
1864 data->pending_phase2_req = NULL;
1865 #ifdef EAP_TNC
1866 data->ready_for_tnc = 0;
1867 data->tnc_started = 0;
1868 #endif /* EAP_TNC */
1869 }
1870
1871
1872 static void * eap_ttls_init_for_reauth(struct eap_sm *sm, void *priv)
1873 {
1874 struct eap_ttls_data *data = priv;
1875 os_free(data->key_data);
1876 data->key_data = NULL;
1877 if (eap_peer_tls_reauth_init(sm, &data->ssl)) {
1878 os_free(data);
1879 return NULL;
1880 }
1881 if (data->phase2_priv && data->phase2_method &&
1882 data->phase2_method->init_for_reauth)
1883 data->phase2_method->init_for_reauth(sm, data->phase2_priv);
1884 data->phase2_start = 0;
1885 data->phase2_success = 0;
1886 data->resuming = 1;
1887 data->reauth = 1;
1888 return priv;
1889 }
1890
1891
1892 static int eap_ttls_get_status(struct eap_sm *sm, void *priv, char *buf,
1893 size_t buflen, int verbose)
1894 {
1895 struct eap_ttls_data *data = priv;
1896 int len, ret;
1897
1898 len = eap_peer_tls_status(sm, &data->ssl, buf, buflen, verbose);
1899 ret = os_snprintf(buf + len, buflen - len,
1900 "EAP-TTLSv%d Phase2 method=",
1901 data->ttls_version);
1902 if (ret < 0 || (size_t) ret >= buflen - len)
1903 return len;
1904 len += ret;
1905 switch (data->phase2_type) {
1906 case EAP_TTLS_PHASE2_EAP:
1907 ret = os_snprintf(buf + len, buflen - len, "EAP-%s\n",
1908 data->phase2_method ?
1909 data->phase2_method->name : "?");
1910 break;
1911 case EAP_TTLS_PHASE2_MSCHAPV2:
1912 ret = os_snprintf(buf + len, buflen - len, "MSCHAPV2\n");
1913 break;
1914 case EAP_TTLS_PHASE2_MSCHAP:
1915 ret = os_snprintf(buf + len, buflen - len, "MSCHAP\n");
1916 break;
1917 case EAP_TTLS_PHASE2_PAP:
1918 ret = os_snprintf(buf + len, buflen - len, "PAP\n");
1919 break;
1920 case EAP_TTLS_PHASE2_CHAP:
1921 ret = os_snprintf(buf + len, buflen - len, "CHAP\n");
1922 break;
1923 default:
1924 ret = 0;
1925 break;
1926 }
1927 if (ret < 0 || (size_t) ret >= buflen - len)
1928 return len;
1929 len += ret;
1930
1931 return len;
1932 }
1933
1934
1935 static Boolean eap_ttls_isKeyAvailable(struct eap_sm *sm, void *priv)
1936 {
1937 struct eap_ttls_data *data = priv;
1938 return data->key_data != NULL && data->phase2_success;
1939 }
1940
1941
1942 static u8 * eap_ttls_getKey(struct eap_sm *sm, void *priv, size_t *len)
1943 {
1944 struct eap_ttls_data *data = priv;
1945 u8 *key;
1946
1947 if (data->key_data == NULL || !data->phase2_success)
1948 return NULL;
1949
1950 key = os_malloc(EAP_TLS_KEY_LEN);
1951 if (key == NULL)
1952 return NULL;
1953
1954 *len = EAP_TLS_KEY_LEN;
1955 os_memcpy(key, data->key_data, EAP_TLS_KEY_LEN);
1956
1957 return key;
1958 }
1959
1960
1961 int eap_peer_ttls_register(void)
1962 {
1963 struct eap_method *eap;
1964 int ret;
1965
1966 eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
1967 EAP_VENDOR_IETF, EAP_TYPE_TTLS, "TTLS");
1968 if (eap == NULL)
1969 return -1;
1970
1971 eap->init = eap_ttls_init;
1972 eap->deinit = eap_ttls_deinit;
1973 eap->process = eap_ttls_process;
1974 eap->isKeyAvailable = eap_ttls_isKeyAvailable;
1975 eap->getKey = eap_ttls_getKey;
1976 eap->get_status = eap_ttls_get_status;
1977 eap->has_reauth_data = eap_ttls_has_reauth_data;
1978 eap->deinit_for_reauth = eap_ttls_deinit_for_reauth;
1979 eap->init_for_reauth = eap_ttls_init_for_reauth;
1980
1981 ret = eap_peer_method_register(eap);
1982 if (ret)
1983 eap_peer_method_free(eap);
1984 return ret;
1985 }
NetBSD on the FriendlyARM MINI2440