2 * EAP peer method: EAP-TTLS (RFC 5281)
3 * Copyright (c) 2004-2015, Jouni Malinen <j@w1.fi>
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
12 #include "crypto/ms_funcs.h"
13 #include "crypto/sha1.h"
14 #include "crypto/tls.h"
15 #include "eap_common/chap.h"
16 #include "eap_common/eap_ttls.h"
19 #include "eap_tls_common.h"
20 #include "eap_config.h"
23 #define EAP_TTLS_VERSION 0
26 static void eap_ttls_deinit(struct eap_sm *sm, void *priv);
29 struct eap_ttls_data {
30 struct eap_ssl_data ssl;
34 const struct eap_method *phase2_method;
38 EapDecision decision_succ;
42 EAP_TTLS_PHASE2_MSCHAPV2,
43 EAP_TTLS_PHASE2_MSCHAP,
47 struct eap_method_type phase2_eap_type;
48 struct eap_method_type *phase2_eap_types;
49 size_t num_phase2_eap_types;
51 u8 auth_response[MSCHAPV2_AUTH_RESPONSE_LEN];
52 int auth_response_valid;
53 u8 master_key[MSCHAPV2_MASTER_KEY_LEN]; /* MSCHAPv2 master key */
55 int resuming; /* starting a resumed session */
56 int reauth; /* reauthentication */
61 struct wpabuf *pending_phase2_req;
62 struct wpabuf *pending_resp;
71 static void * eap_ttls_init(struct eap_sm *sm)
73 struct eap_ttls_data *data;
74 struct eap_peer_config *config = eap_get_config(sm);
78 data = os_zalloc(sizeof(*data));
81 data->ttls_version = EAP_TTLS_VERSION;
84 data->phase2_type = EAP_TTLS_PHASE2_EAP;
87 * Either one auth= type or one or more autheap= methods can be
90 if (config && config->phase2) {
91 const char *token, *last = NULL;
93 while ((token = cstr_token(config->phase2, " \t", &last))) {
94 if (os_strncmp(token, "auth=", 5) != 0)
98 if (last - token == 8 &&
99 os_strncmp(token, "MSCHAPV2", 8) == 0) {
100 selected = "MSCHAPV2";
101 data->phase2_type = EAP_TTLS_PHASE2_MSCHAPV2;
102 } else if (last - token == 6 &&
103 os_strncmp(token, "MSCHAP", 6) == 0) {
105 data->phase2_type = EAP_TTLS_PHASE2_MSCHAP;
106 } else if (last - token == 3 &&
107 os_strncmp(token, "PAP", 3) == 0) {
109 data->phase2_type = EAP_TTLS_PHASE2_PAP;
110 } else if (last - token == 4 &&
111 os_strncmp(token, "CHAP", 4) == 0) {
113 data->phase2_type = EAP_TTLS_PHASE2_CHAP;
115 wpa_printf(MSG_ERROR,
116 "EAP-TTLS: Unsupported Phase2 type '%s'",
118 eap_ttls_deinit(sm, data);
122 if (selected_non_eap) {
123 wpa_printf(MSG_ERROR,
124 "EAP-TTLS: Only one Phase2 type can be specified");
125 eap_ttls_deinit(sm, data);
129 selected_non_eap = 1;
132 if (os_strstr(config->phase2, "autheap=")) {
133 if (selected_non_eap) {
134 wpa_printf(MSG_ERROR,
135 "EAP-TTLS: Both auth= and autheap= params cannot be specified");
136 eap_ttls_deinit(sm, data);
140 data->phase2_type = EAP_TTLS_PHASE2_EAP;
144 wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase2 type: %s", selected);
146 if (data->phase2_type == EAP_TTLS_PHASE2_EAP) {
147 if (eap_peer_select_phase2_methods(config, "autheap=",
148 &data->phase2_eap_types,
149 &data->num_phase2_eap_types)
151 eap_ttls_deinit(sm, data);
155 data->phase2_eap_type.vendor = EAP_VENDOR_IETF;
156 data->phase2_eap_type.method = EAP_TYPE_NONE;
159 if (eap_peer_tls_ssl_init(sm, &data->ssl, config, EAP_TYPE_TTLS)) {
160 wpa_printf(MSG_INFO, "EAP-TTLS: Failed to initialize SSL.");
161 eap_ttls_deinit(sm, data);
169 static void eap_ttls_phase2_eap_deinit(struct eap_sm *sm,
170 struct eap_ttls_data *data)
172 if (data->phase2_priv && data->phase2_method) {
173 data->phase2_method->deinit(sm, data->phase2_priv);
174 data->phase2_method = NULL;
175 data->phase2_priv = NULL;
180 static void eap_ttls_free_key(struct eap_ttls_data *data)
182 if (data->key_data) {
183 bin_clear_free(data->key_data, EAP_TLS_KEY_LEN + EAP_EMSK_LEN);
184 data->key_data = NULL;
189 static void eap_ttls_deinit(struct eap_sm *sm, void *priv)
191 struct eap_ttls_data *data = priv;
194 eap_ttls_phase2_eap_deinit(sm, data);
195 os_free(data->phase2_eap_types);
196 eap_peer_tls_ssl_deinit(sm, &data->ssl);
197 eap_ttls_free_key(data);
198 os_free(data->session_id);
199 wpabuf_free(data->pending_phase2_req);
200 wpabuf_free(data->pending_resp);
205 static u8 * eap_ttls_avp_hdr(u8 *avphdr, u32 avp_code, u32 vendor_id,
206 int mandatory, size_t len)
208 struct ttls_avp_vendor *avp;
212 avp = (struct ttls_avp_vendor *) avphdr;
213 flags = mandatory ? AVP_FLAGS_MANDATORY : 0;
215 flags |= AVP_FLAGS_VENDOR;
216 hdrlen = sizeof(*avp);
217 avp->vendor_id = host_to_be32(vendor_id);
219 hdrlen = sizeof(struct ttls_avp);
222 avp->avp_code = host_to_be32(avp_code);
223 avp->avp_length = host_to_be32(((u32) flags << 24) |
224 (u32) (hdrlen + len));
226 return avphdr + hdrlen;
230 static u8 * eap_ttls_avp_add(u8 *start, u8 *avphdr, u32 avp_code,
231 u32 vendor_id, int mandatory,
232 const u8 *data, size_t len)
235 pos = eap_ttls_avp_hdr(avphdr, avp_code, vendor_id, mandatory, len);
236 os_memcpy(pos, data, len);
243 static int eap_ttls_avp_encapsulate(struct wpabuf **resp, u32 avp_code,
249 msg = wpabuf_alloc(sizeof(struct ttls_avp) + wpabuf_len(*resp) + 4);
256 avp = wpabuf_mhead(msg);
257 pos = eap_ttls_avp_hdr(avp, avp_code, 0, mandatory, wpabuf_len(*resp));
258 os_memcpy(pos, wpabuf_head(*resp), wpabuf_len(*resp));
259 pos += wpabuf_len(*resp);
262 wpabuf_put(msg, pos - avp);
268 static int eap_ttls_v0_derive_key(struct eap_sm *sm,
269 struct eap_ttls_data *data)
271 eap_ttls_free_key(data);
272 data->key_data = eap_peer_tls_derive_key(sm, &data->ssl,
273 "ttls keying material",
276 if (!data->key_data) {
277 wpa_printf(MSG_INFO, "EAP-TTLS: Failed to derive key");
281 wpa_hexdump_key(MSG_DEBUG, "EAP-TTLS: Derived key",
282 data->key_data, EAP_TLS_KEY_LEN);
283 wpa_hexdump_key(MSG_DEBUG, "EAP-TTLS: Derived EMSK",
284 data->key_data + EAP_TLS_KEY_LEN,
287 os_free(data->session_id);
288 data->session_id = eap_peer_tls_derive_session_id(sm, &data->ssl,
291 if (data->session_id) {
292 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: Derived Session-Id",
293 data->session_id, data->id_len);
295 wpa_printf(MSG_ERROR, "EAP-TTLS: Failed to derive Session-Id");
303 static u8 * eap_ttls_implicit_challenge(struct eap_sm *sm,
304 struct eap_ttls_data *data, size_t len)
306 return eap_peer_tls_derive_key(sm, &data->ssl, "ttls challenge", len);
308 #endif /* CONFIG_FIPS */
311 static void eap_ttls_phase2_select_eap_method(struct eap_ttls_data *data,
315 for (i = 0; i < data->num_phase2_eap_types; i++) {
316 if (data->phase2_eap_types[i].vendor != EAP_VENDOR_IETF ||
317 data->phase2_eap_types[i].method != method)
320 data->phase2_eap_type.vendor =
321 data->phase2_eap_types[i].vendor;
322 data->phase2_eap_type.method =
323 data->phase2_eap_types[i].method;
324 wpa_printf(MSG_DEBUG, "EAP-TTLS: Selected "
325 "Phase 2 EAP vendor %d method %d",
326 data->phase2_eap_type.vendor,
327 data->phase2_eap_type.method);
333 static int eap_ttls_phase2_eap_process(struct eap_sm *sm,
334 struct eap_ttls_data *data,
335 struct eap_method_ret *ret,
336 struct eap_hdr *hdr, size_t len,
337 struct wpabuf **resp)
340 struct eap_method_ret iret;
342 os_memset(&iret, 0, sizeof(iret));
343 wpabuf_set(&msg, hdr, len);
344 *resp = data->phase2_method->process(sm, data->phase2_priv, &iret,
346 if ((iret.methodState == METHOD_DONE ||
347 iret.methodState == METHOD_MAY_CONT) &&
348 (iret.decision == DECISION_UNCOND_SUCC ||
349 iret.decision == DECISION_COND_SUCC ||
350 iret.decision == DECISION_FAIL)) {
351 ret->methodState = iret.methodState;
352 ret->decision = iret.decision;
359 static int eap_ttls_phase2_request_eap_method(struct eap_sm *sm,
360 struct eap_ttls_data *data,
361 struct eap_method_ret *ret,
362 struct eap_hdr *hdr, size_t len,
363 u8 method, struct wpabuf **resp)
366 if (data->tnc_started && data->phase2_method &&
367 data->phase2_priv && method == EAP_TYPE_TNC &&
368 data->phase2_eap_type.method == EAP_TYPE_TNC)
369 return eap_ttls_phase2_eap_process(sm, data, ret, hdr, len,
372 if (data->ready_for_tnc && !data->tnc_started &&
373 method == EAP_TYPE_TNC) {
374 wpa_printf(MSG_DEBUG, "EAP-TTLS: Start TNC after completed "
376 data->tnc_started = 1;
379 if (data->tnc_started) {
380 if (data->phase2_eap_type.vendor != EAP_VENDOR_IETF ||
381 data->phase2_eap_type.method == EAP_TYPE_TNC) {
382 wpa_printf(MSG_DEBUG, "EAP-TTLS: Unexpected EAP "
383 "type %d for TNC", method);
387 data->phase2_eap_type.vendor = EAP_VENDOR_IETF;
388 data->phase2_eap_type.method = method;
389 wpa_printf(MSG_DEBUG, "EAP-TTLS: Selected "
390 "Phase 2 EAP vendor %d method %d (TNC)",
391 data->phase2_eap_type.vendor,
392 data->phase2_eap_type.method);
394 if (data->phase2_type == EAP_TTLS_PHASE2_EAP)
395 eap_ttls_phase2_eap_deinit(sm, data);
399 if (data->phase2_eap_type.vendor == EAP_VENDOR_IETF &&
400 data->phase2_eap_type.method == EAP_TYPE_NONE)
401 eap_ttls_phase2_select_eap_method(data, method);
403 if (method != data->phase2_eap_type.method || method == EAP_TYPE_NONE)
405 if (eap_peer_tls_phase2_nak(data->phase2_eap_types,
406 data->num_phase2_eap_types,
412 if (data->phase2_priv == NULL) {
413 data->phase2_method = eap_peer_get_eap_method(
414 EAP_VENDOR_IETF, method);
415 if (data->phase2_method) {
417 data->phase2_priv = data->phase2_method->init(sm);
421 if (data->phase2_priv == NULL || data->phase2_method == NULL) {
422 wpa_printf(MSG_INFO, "EAP-TTLS: failed to initialize "
423 "Phase 2 EAP method %d", method);
427 return eap_ttls_phase2_eap_process(sm, data, ret, hdr, len, resp);
431 static int eap_ttls_phase2_request_eap(struct eap_sm *sm,
432 struct eap_ttls_data *data,
433 struct eap_method_ret *ret,
435 struct wpabuf **resp)
437 size_t len = be_to_host16(hdr->length);
439 struct eap_peer_config *config = eap_get_config(sm);
441 if (len <= sizeof(struct eap_hdr)) {
442 wpa_printf(MSG_INFO, "EAP-TTLS: too short "
443 "Phase 2 request (len=%lu)", (unsigned long) len);
446 pos = (u8 *) (hdr + 1);
447 wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 EAP Request: type=%d", *pos);
449 case EAP_TYPE_IDENTITY:
450 *resp = eap_sm_buildIdentity(sm, hdr->identifier, 1);
453 if (eap_ttls_phase2_request_eap_method(sm, data, ret, hdr, len,
460 (config->pending_req_identity || config->pending_req_password ||
461 config->pending_req_otp || config->pending_req_sim)) {
468 wpa_hexdump_buf(MSG_DEBUG, "EAP-TTLS: AVP encapsulate EAP Response",
470 return eap_ttls_avp_encapsulate(resp, RADIUS_ATTR_EAP_MESSAGE, 1);
474 static int eap_ttls_phase2_request_mschapv2(struct eap_sm *sm,
475 struct eap_ttls_data *data,
476 struct eap_method_ret *ret,
477 struct wpabuf **resp)
480 wpa_printf(MSG_ERROR, "EAP-TTLS: MSCHAPV2 not supported in FIPS build");
482 #else /* CONFIG_FIPS */
485 u8 *buf, *pos, *challenge, *peer_challenge;
486 const u8 *identity, *password;
487 size_t identity_len, password_len;
490 wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 MSCHAPV2 Request");
492 identity = eap_get_config_identity(sm, &identity_len);
493 password = eap_get_config_password2(sm, &password_len, &pwhash);
494 if (identity == NULL || password == NULL)
497 msg = wpabuf_alloc(identity_len + 1000);
499 wpa_printf(MSG_ERROR,
500 "EAP-TTLS/MSCHAPV2: Failed to allocate memory");
503 pos = buf = wpabuf_mhead(msg);
506 pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_USER_NAME, 0, 1,
507 identity, identity_len);
509 /* MS-CHAP-Challenge */
510 challenge = eap_ttls_implicit_challenge(
511 sm, data, EAP_TTLS_MSCHAPV2_CHALLENGE_LEN + 1);
512 if (challenge == NULL) {
514 wpa_printf(MSG_ERROR, "EAP-TTLS/MSCHAPV2: Failed to derive "
515 "implicit challenge");
519 pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_MS_CHAP_CHALLENGE,
520 RADIUS_VENDOR_ID_MICROSOFT, 1,
521 challenge, EAP_TTLS_MSCHAPV2_CHALLENGE_LEN);
523 /* MS-CHAP2-Response */
524 pos = eap_ttls_avp_hdr(pos, RADIUS_ATTR_MS_CHAP2_RESPONSE,
525 RADIUS_VENDOR_ID_MICROSOFT, 1,
526 EAP_TTLS_MSCHAPV2_RESPONSE_LEN);
527 data->ident = challenge[EAP_TTLS_MSCHAPV2_CHALLENGE_LEN];
528 *pos++ = data->ident;
529 *pos++ = 0; /* Flags */
530 if (os_get_random(pos, EAP_TTLS_MSCHAPV2_CHALLENGE_LEN) < 0) {
533 wpa_printf(MSG_ERROR, "EAP-TTLS/MSCHAPV2: Failed to get "
534 "random data for peer challenge");
537 peer_challenge = pos;
538 pos += EAP_TTLS_MSCHAPV2_CHALLENGE_LEN;
539 os_memset(pos, 0, 8); /* Reserved, must be zero */
541 if (mschapv2_derive_response(identity, identity_len, password,
542 password_len, pwhash, challenge,
543 peer_challenge, pos, data->auth_response,
547 wpa_printf(MSG_ERROR, "EAP-TTLS/MSCHAPV2: Failed to derive "
551 data->auth_response_valid = 1;
557 wpabuf_put(msg, pos - buf);
561 #else /* EAP_MSCHAPv2 */
562 wpa_printf(MSG_ERROR, "EAP-TTLS: MSCHAPv2 not included in the build");
564 #endif /* EAP_MSCHAPv2 */
565 #endif /* CONFIG_FIPS */
569 static int eap_ttls_phase2_request_mschap(struct eap_sm *sm,
570 struct eap_ttls_data *data,
571 struct eap_method_ret *ret,
572 struct wpabuf **resp)
575 wpa_printf(MSG_ERROR, "EAP-TTLS: MSCHAP not supported in FIPS build");
577 #else /* CONFIG_FIPS */
579 u8 *buf, *pos, *challenge;
580 const u8 *identity, *password;
581 size_t identity_len, password_len;
584 wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 MSCHAP Request");
586 identity = eap_get_config_identity(sm, &identity_len);
587 password = eap_get_config_password2(sm, &password_len, &pwhash);
588 if (identity == NULL || password == NULL)
591 msg = wpabuf_alloc(identity_len + 1000);
593 wpa_printf(MSG_ERROR,
594 "EAP-TTLS/MSCHAP: Failed to allocate memory");
597 pos = buf = wpabuf_mhead(msg);
600 pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_USER_NAME, 0, 1,
601 identity, identity_len);
603 /* MS-CHAP-Challenge */
604 challenge = eap_ttls_implicit_challenge(
605 sm, data, EAP_TTLS_MSCHAP_CHALLENGE_LEN + 1);
606 if (challenge == NULL) {
608 wpa_printf(MSG_ERROR, "EAP-TTLS/MSCHAP: Failed to derive "
609 "implicit challenge");
613 pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_MS_CHAP_CHALLENGE,
614 RADIUS_VENDOR_ID_MICROSOFT, 1,
615 challenge, EAP_TTLS_MSCHAP_CHALLENGE_LEN);
617 /* MS-CHAP-Response */
618 pos = eap_ttls_avp_hdr(pos, RADIUS_ATTR_MS_CHAP_RESPONSE,
619 RADIUS_VENDOR_ID_MICROSOFT, 1,
620 EAP_TTLS_MSCHAP_RESPONSE_LEN);
621 data->ident = challenge[EAP_TTLS_MSCHAP_CHALLENGE_LEN];
622 *pos++ = data->ident;
623 *pos++ = 1; /* Flags: Use NT style passwords */
624 os_memset(pos, 0, 24); /* LM-Response */
628 if (challenge_response(challenge, password, pos)) {
629 wpa_printf(MSG_ERROR,
630 "EAP-TTLS/MSCHAP: Failed derive password hash");
636 wpa_hexdump_key(MSG_DEBUG, "EAP-TTLS: MSCHAP password hash",
640 if (nt_challenge_response(challenge, password, password_len,
642 wpa_printf(MSG_ERROR,
643 "EAP-TTLS/MSCHAP: Failed derive password");
649 wpa_hexdump_ascii_key(MSG_DEBUG, "EAP-TTLS: MSCHAP password",
650 password, password_len);
652 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: MSCHAP implicit challenge",
653 challenge, EAP_TTLS_MSCHAP_CHALLENGE_LEN);
654 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: MSCHAP response", pos, 24);
659 wpabuf_put(msg, pos - buf);
662 /* EAP-TTLS/MSCHAP does not provide tunneled success
663 * notification, so assume that Phase2 succeeds. */
664 ret->methodState = METHOD_DONE;
665 ret->decision = DECISION_COND_SUCC;
668 #endif /* CONFIG_FIPS */
672 static int eap_ttls_phase2_request_pap(struct eap_sm *sm,
673 struct eap_ttls_data *data,
674 struct eap_method_ret *ret,
675 struct wpabuf **resp)
680 const u8 *identity, *password;
681 size_t identity_len, password_len;
683 wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 PAP Request");
685 identity = eap_get_config_identity(sm, &identity_len);
686 password = eap_get_config_password(sm, &password_len);
687 if (identity == NULL || password == NULL)
690 msg = wpabuf_alloc(identity_len + password_len + 100);
692 wpa_printf(MSG_ERROR,
693 "EAP-TTLS/PAP: Failed to allocate memory");
696 pos = buf = wpabuf_mhead(msg);
699 pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_USER_NAME, 0, 1,
700 identity, identity_len);
702 /* User-Password; in RADIUS, this is encrypted, but EAP-TTLS encrypts
703 * the data, so no separate encryption is used in the AVP itself.
704 * However, the password is padded to obfuscate its length. */
705 pad = password_len == 0 ? 16 : (16 - (password_len & 15)) & 15;
706 pos = eap_ttls_avp_hdr(pos, RADIUS_ATTR_USER_PASSWORD, 0, 1,
708 os_memcpy(pos, password, password_len);
710 os_memset(pos, 0, pad);
714 wpabuf_put(msg, pos - buf);
717 /* EAP-TTLS/PAP does not provide tunneled success notification,
718 * so assume that Phase2 succeeds. */
719 ret->methodState = METHOD_DONE;
720 ret->decision = DECISION_COND_SUCC;
726 static int eap_ttls_phase2_request_chap(struct eap_sm *sm,
727 struct eap_ttls_data *data,
728 struct eap_method_ret *ret,
729 struct wpabuf **resp)
732 wpa_printf(MSG_ERROR, "EAP-TTLS: CHAP not supported in FIPS build");
734 #else /* CONFIG_FIPS */
736 u8 *buf, *pos, *challenge;
737 const u8 *identity, *password;
738 size_t identity_len, password_len;
740 wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 CHAP Request");
742 identity = eap_get_config_identity(sm, &identity_len);
743 password = eap_get_config_password(sm, &password_len);
744 if (identity == NULL || password == NULL)
747 msg = wpabuf_alloc(identity_len + 1000);
749 wpa_printf(MSG_ERROR,
750 "EAP-TTLS/CHAP: Failed to allocate memory");
753 pos = buf = wpabuf_mhead(msg);
756 pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_USER_NAME, 0, 1,
757 identity, identity_len);
760 challenge = eap_ttls_implicit_challenge(
761 sm, data, EAP_TTLS_CHAP_CHALLENGE_LEN + 1);
762 if (challenge == NULL) {
764 wpa_printf(MSG_ERROR, "EAP-TTLS/CHAP: Failed to derive "
765 "implicit challenge");
769 pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_CHAP_CHALLENGE, 0, 1,
770 challenge, EAP_TTLS_CHAP_CHALLENGE_LEN);
773 pos = eap_ttls_avp_hdr(pos, RADIUS_ATTR_CHAP_PASSWORD, 0, 1,
774 1 + EAP_TTLS_CHAP_PASSWORD_LEN);
775 data->ident = challenge[EAP_TTLS_CHAP_CHALLENGE_LEN];
776 *pos++ = data->ident;
778 /* MD5(Ident + Password + Challenge) */
779 chap_md5(data->ident, password, password_len, challenge,
780 EAP_TTLS_CHAP_CHALLENGE_LEN, pos);
782 wpa_hexdump_ascii(MSG_DEBUG, "EAP-TTLS: CHAP username",
783 identity, identity_len);
784 wpa_hexdump_ascii_key(MSG_DEBUG, "EAP-TTLS: CHAP password",
785 password, password_len);
786 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: CHAP implicit challenge",
787 challenge, EAP_TTLS_CHAP_CHALLENGE_LEN);
788 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: CHAP password",
789 pos, EAP_TTLS_CHAP_PASSWORD_LEN);
790 pos += EAP_TTLS_CHAP_PASSWORD_LEN;
794 wpabuf_put(msg, pos - buf);
797 /* EAP-TTLS/CHAP does not provide tunneled success
798 * notification, so assume that Phase2 succeeds. */
799 ret->methodState = METHOD_DONE;
800 ret->decision = DECISION_COND_SUCC;
803 #endif /* CONFIG_FIPS */
807 static int eap_ttls_phase2_request(struct eap_sm *sm,
808 struct eap_ttls_data *data,
809 struct eap_method_ret *ret,
811 struct wpabuf **resp)
815 enum phase2_types phase2_type = data->phase2_type;
818 if (data->tnc_started) {
819 wpa_printf(MSG_DEBUG, "EAP-TTLS: Processing TNC");
820 phase2_type = EAP_TTLS_PHASE2_EAP;
824 if (phase2_type == EAP_TTLS_PHASE2_MSCHAPV2 ||
825 phase2_type == EAP_TTLS_PHASE2_MSCHAP ||
826 phase2_type == EAP_TTLS_PHASE2_PAP ||
827 phase2_type == EAP_TTLS_PHASE2_CHAP) {
828 if (eap_get_config_identity(sm, &len) == NULL) {
830 "EAP-TTLS: Identity not configured");
831 eap_sm_request_identity(sm);
832 if (eap_get_config_password(sm, &len) == NULL)
833 eap_sm_request_password(sm);
837 if (eap_get_config_password(sm, &len) == NULL) {
839 "EAP-TTLS: Password not configured");
840 eap_sm_request_password(sm);
845 switch (phase2_type) {
846 case EAP_TTLS_PHASE2_EAP:
847 res = eap_ttls_phase2_request_eap(sm, data, ret, hdr, resp);
849 case EAP_TTLS_PHASE2_MSCHAPV2:
850 res = eap_ttls_phase2_request_mschapv2(sm, data, ret, resp);
852 case EAP_TTLS_PHASE2_MSCHAP:
853 res = eap_ttls_phase2_request_mschap(sm, data, ret, resp);
855 case EAP_TTLS_PHASE2_PAP:
856 res = eap_ttls_phase2_request_pap(sm, data, ret, resp);
858 case EAP_TTLS_PHASE2_CHAP:
859 res = eap_ttls_phase2_request_chap(sm, data, ret, resp);
862 wpa_printf(MSG_ERROR, "EAP-TTLS: Phase 2 - Unknown");
868 ret->methodState = METHOD_DONE;
869 ret->decision = DECISION_FAIL;
876 struct ttls_parse_avp {
884 static int eap_ttls_parse_attr_eap(const u8 *dpos, size_t dlen,
885 struct ttls_parse_avp *parse)
887 wpa_printf(MSG_DEBUG, "EAP-TTLS: AVP - EAP Message");
888 if (parse->eapdata == NULL) {
889 parse->eapdata = os_memdup(dpos, dlen);
890 if (parse->eapdata == NULL) {
891 wpa_printf(MSG_WARNING, "EAP-TTLS: Failed to allocate "
892 "memory for Phase 2 EAP data");
895 parse->eap_len = dlen;
897 u8 *neweap = os_realloc(parse->eapdata, parse->eap_len + dlen);
898 if (neweap == NULL) {
899 wpa_printf(MSG_WARNING, "EAP-TTLS: Failed to allocate "
900 "memory for Phase 2 EAP data");
903 os_memcpy(neweap + parse->eap_len, dpos, dlen);
904 parse->eapdata = neweap;
905 parse->eap_len += dlen;
912 static int eap_ttls_parse_avp(u8 *pos, size_t left,
913 struct ttls_parse_avp *parse)
915 struct ttls_avp *avp;
916 u32 avp_code, avp_length, vendor_id = 0;
920 avp = (struct ttls_avp *) pos;
921 avp_code = be_to_host32(avp->avp_code);
922 avp_length = be_to_host32(avp->avp_length);
923 avp_flags = (avp_length >> 24) & 0xff;
924 avp_length &= 0xffffff;
925 wpa_printf(MSG_DEBUG, "EAP-TTLS: AVP: code=%d flags=0x%02x "
926 "length=%d", (int) avp_code, avp_flags,
929 if (avp_length > left) {
930 wpa_printf(MSG_WARNING, "EAP-TTLS: AVP overflow "
931 "(len=%d, left=%lu) - dropped",
932 (int) avp_length, (unsigned long) left);
936 if (avp_length < sizeof(*avp)) {
937 wpa_printf(MSG_WARNING, "EAP-TTLS: Invalid AVP length %d",
942 dpos = (u8 *) (avp + 1);
943 dlen = avp_length - sizeof(*avp);
944 if (avp_flags & AVP_FLAGS_VENDOR) {
946 wpa_printf(MSG_WARNING, "EAP-TTLS: Vendor AVP "
950 vendor_id = WPA_GET_BE32(dpos);
951 wpa_printf(MSG_DEBUG, "EAP-TTLS: AVP vendor_id %d",
957 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: AVP data", dpos, dlen);
959 if (vendor_id == 0 && avp_code == RADIUS_ATTR_EAP_MESSAGE) {
960 if (eap_ttls_parse_attr_eap(dpos, dlen, parse) < 0)
962 } else if (vendor_id == 0 && avp_code == RADIUS_ATTR_REPLY_MESSAGE) {
963 /* This is an optional message that can be displayed to
965 wpa_hexdump_ascii(MSG_DEBUG, "EAP-TTLS: AVP - Reply-Message",
967 } else if (vendor_id == RADIUS_VENDOR_ID_MICROSOFT &&
968 avp_code == RADIUS_ATTR_MS_CHAP2_SUCCESS) {
969 wpa_hexdump_ascii(MSG_DEBUG, "EAP-TTLS: MS-CHAP2-Success",
972 wpa_printf(MSG_WARNING, "EAP-TTLS: Unexpected "
973 "MS-CHAP2-Success length "
974 "(len=%lu, expected 43)",
975 (unsigned long) dlen);
978 parse->mschapv2 = dpos;
979 } else if (vendor_id == RADIUS_VENDOR_ID_MICROSOFT &&
980 avp_code == RADIUS_ATTR_MS_CHAP_ERROR) {
981 wpa_hexdump_ascii(MSG_DEBUG, "EAP-TTLS: MS-CHAP-Error",
983 parse->mschapv2_error = 1;
984 } else if (avp_flags & AVP_FLAGS_MANDATORY) {
985 wpa_printf(MSG_WARNING, "EAP-TTLS: Unsupported mandatory AVP "
986 "code %d vendor_id %d - dropped",
987 (int) avp_code, (int) vendor_id);
990 wpa_printf(MSG_DEBUG, "EAP-TTLS: Ignoring unsupported AVP "
991 "code %d vendor_id %d",
992 (int) avp_code, (int) vendor_id);
999 static int eap_ttls_parse_avps(struct wpabuf *in_decrypted,
1000 struct ttls_parse_avp *parse)
1006 pos = wpabuf_mhead(in_decrypted);
1007 left = wpabuf_len(in_decrypted);
1008 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: Decrypted Phase 2 AVPs", pos, left);
1009 if (left < sizeof(struct ttls_avp)) {
1010 wpa_printf(MSG_WARNING, "EAP-TTLS: Too short Phase 2 AVP frame"
1011 " len=%lu expected %lu or more - dropped",
1012 (unsigned long) left,
1013 (unsigned long) sizeof(struct ttls_avp));
1018 os_memset(parse, 0, sizeof(*parse));
1021 avp_length = eap_ttls_parse_avp(pos, left, parse);
1025 pad = (4 - (avp_length & 3)) & 3;
1026 pos += avp_length + pad;
1027 if (left < avp_length + pad)
1030 left -= avp_length + pad;
1037 static u8 * eap_ttls_fake_identity_request(void)
1039 struct eap_hdr *hdr;
1042 wpa_printf(MSG_DEBUG, "EAP-TTLS: empty data in beginning of "
1043 "Phase 2 - use fake EAP-Request Identity");
1044 buf = os_malloc(sizeof(*hdr) + 1);
1046 wpa_printf(MSG_WARNING, "EAP-TTLS: failed to allocate "
1047 "memory for fake EAP-Identity Request");
1051 hdr = (struct eap_hdr *) buf;
1052 hdr->code = EAP_CODE_REQUEST;
1053 hdr->identifier = 0;
1054 hdr->length = host_to_be16(sizeof(*hdr) + 1);
1055 buf[sizeof(*hdr)] = EAP_TYPE_IDENTITY;
1061 static int eap_ttls_encrypt_response(struct eap_sm *sm,
1062 struct eap_ttls_data *data,
1063 struct wpabuf *resp, u8 identifier,
1064 struct wpabuf **out_data)
1069 wpa_hexdump_buf_key(MSG_DEBUG, "EAP-TTLS: Encrypting Phase 2 data",
1071 if (eap_peer_tls_encrypt(sm, &data->ssl, EAP_TYPE_TTLS,
1072 data->ttls_version, identifier,
1074 wpa_printf(MSG_INFO, "EAP-TTLS: Failed to encrypt a Phase 2 "
1085 static int eap_ttls_process_phase2_eap(struct eap_sm *sm,
1086 struct eap_ttls_data *data,
1087 struct eap_method_ret *ret,
1088 struct ttls_parse_avp *parse,
1089 struct wpabuf **resp)
1091 struct eap_hdr *hdr;
1094 if (parse->eapdata == NULL) {
1095 wpa_printf(MSG_WARNING, "EAP-TTLS: No EAP Message in the "
1096 "packet - dropped");
1100 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: Phase 2 EAP",
1101 parse->eapdata, parse->eap_len);
1102 hdr = (struct eap_hdr *) parse->eapdata;
1104 if (parse->eap_len < sizeof(*hdr)) {
1105 wpa_printf(MSG_WARNING, "EAP-TTLS: Too short Phase 2 EAP "
1106 "frame (len=%lu, expected %lu or more) - dropped",
1107 (unsigned long) parse->eap_len,
1108 (unsigned long) sizeof(*hdr));
1111 len = be_to_host16(hdr->length);
1112 if (len > parse->eap_len) {
1113 wpa_printf(MSG_INFO, "EAP-TTLS: Length mismatch in Phase 2 "
1114 "EAP frame (EAP hdr len=%lu, EAP data len in "
1116 (unsigned long) len,
1117 (unsigned long) parse->eap_len);
1120 wpa_printf(MSG_DEBUG, "EAP-TTLS: received Phase 2: code=%d "
1121 "identifier=%d length=%lu",
1122 hdr->code, hdr->identifier, (unsigned long) len);
1123 switch (hdr->code) {
1124 case EAP_CODE_REQUEST:
1125 if (eap_ttls_phase2_request(sm, data, ret, hdr, resp)) {
1126 wpa_printf(MSG_INFO, "EAP-TTLS: Phase2 Request "
1127 "processing failed");
1132 wpa_printf(MSG_INFO, "EAP-TTLS: Unexpected code=%d in "
1133 "Phase 2 EAP header", hdr->code);
1141 static int eap_ttls_process_phase2_mschapv2(struct eap_sm *sm,
1142 struct eap_ttls_data *data,
1143 struct eap_method_ret *ret,
1144 struct ttls_parse_avp *parse)
1147 if (parse->mschapv2_error) {
1148 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2: Received "
1149 "MS-CHAP-Error - failed");
1150 ret->methodState = METHOD_DONE;
1151 ret->decision = DECISION_FAIL;
1152 /* Reply with empty data to ACK error */
1156 if (parse->mschapv2 == NULL) {
1158 if (data->phase2_success && parse->eapdata) {
1160 * Allow EAP-TNC to be started after successfully
1161 * completed MSCHAPV2.
1165 #endif /* EAP_TNC */
1166 wpa_printf(MSG_WARNING, "EAP-TTLS: no MS-CHAP2-Success AVP "
1167 "received for Phase2 MSCHAPV2");
1170 if (parse->mschapv2[0] != data->ident) {
1171 wpa_printf(MSG_WARNING, "EAP-TTLS: Ident mismatch for Phase 2 "
1172 "MSCHAPV2 (received Ident 0x%02x, expected 0x%02x)",
1173 parse->mschapv2[0], data->ident);
1176 if (!data->auth_response_valid ||
1177 mschapv2_verify_auth_response(data->auth_response,
1178 parse->mschapv2 + 1, 42)) {
1179 wpa_printf(MSG_WARNING, "EAP-TTLS: Invalid authenticator "
1180 "response in Phase 2 MSCHAPV2 success request");
1184 wpa_printf(MSG_INFO, "EAP-TTLS: Phase 2 MSCHAPV2 "
1185 "authentication succeeded");
1186 ret->methodState = METHOD_DONE;
1187 ret->decision = DECISION_UNCOND_SUCC;
1188 data->phase2_success = 1;
1191 * Reply with empty data; authentication server will reply
1192 * with EAP-Success after this.
1195 #else /* EAP_MSCHAPv2 */
1196 wpa_printf(MSG_ERROR, "EAP-TTLS: MSCHAPv2 not included in the build");
1198 #endif /* EAP_MSCHAPv2 */
1203 static int eap_ttls_process_tnc_start(struct eap_sm *sm,
1204 struct eap_ttls_data *data,
1205 struct eap_method_ret *ret,
1206 struct ttls_parse_avp *parse,
1207 struct wpabuf **resp)
1209 /* TNC uses inner EAP method after non-EAP TTLS phase 2. */
1210 if (parse->eapdata == NULL) {
1211 wpa_printf(MSG_INFO, "EAP-TTLS: Phase 2 received "
1212 "unexpected tunneled data (no EAP)");
1216 if (!data->ready_for_tnc) {
1217 wpa_printf(MSG_INFO, "EAP-TTLS: Phase 2 received "
1218 "EAP after non-EAP, but not ready for TNC");
1222 wpa_printf(MSG_DEBUG, "EAP-TTLS: Start TNC after completed "
1224 data->tnc_started = 1;
1226 if (eap_ttls_process_phase2_eap(sm, data, ret, parse, resp) < 0)
1231 #endif /* EAP_TNC */
1234 static int eap_ttls_process_decrypted(struct eap_sm *sm,
1235 struct eap_ttls_data *data,
1236 struct eap_method_ret *ret,
1238 struct ttls_parse_avp *parse,
1239 struct wpabuf *in_decrypted,
1240 struct wpabuf **out_data)
1242 struct wpabuf *resp = NULL;
1243 struct eap_peer_config *config = eap_get_config(sm);
1245 enum phase2_types phase2_type = data->phase2_type;
1248 if (data->tnc_started)
1249 phase2_type = EAP_TTLS_PHASE2_EAP;
1250 #endif /* EAP_TNC */
1252 switch (phase2_type) {
1253 case EAP_TTLS_PHASE2_EAP:
1254 if (eap_ttls_process_phase2_eap(sm, data, ret, parse, &resp) <
1258 case EAP_TTLS_PHASE2_MSCHAPV2:
1259 res = eap_ttls_process_phase2_mschapv2(sm, data, ret, parse);
1261 if (res == 1 && parse->eapdata && data->phase2_success) {
1263 * TNC may be required as the next
1264 * authentication method within the tunnel.
1266 ret->methodState = METHOD_MAY_CONT;
1267 data->ready_for_tnc = 1;
1268 if (eap_ttls_process_tnc_start(sm, data, ret, parse,
1272 #endif /* EAP_TNC */
1274 case EAP_TTLS_PHASE2_MSCHAP:
1275 case EAP_TTLS_PHASE2_PAP:
1276 case EAP_TTLS_PHASE2_CHAP:
1278 if (eap_ttls_process_tnc_start(sm, data, ret, parse, &resp) <
1283 /* EAP-TTLS/{MSCHAP,PAP,CHAP} should not send any TLS tunneled
1284 * requests to the supplicant */
1285 wpa_printf(MSG_INFO, "EAP-TTLS: Phase 2 received unexpected "
1288 #endif /* EAP_TNC */
1292 if (eap_ttls_encrypt_response(sm, data, resp, identifier,
1295 } else if (config->pending_req_identity ||
1296 config->pending_req_password ||
1297 config->pending_req_otp ||
1298 config->pending_req_new_password ||
1299 config->pending_req_sim) {
1300 wpabuf_free(data->pending_phase2_req);
1301 data->pending_phase2_req = wpabuf_dup(in_decrypted);
1308 static int eap_ttls_implicit_identity_request(struct eap_sm *sm,
1309 struct eap_ttls_data *data,
1310 struct eap_method_ret *ret,
1312 struct wpabuf **out_data)
1315 struct eap_hdr *hdr;
1316 struct wpabuf *resp;
1318 hdr = (struct eap_hdr *) eap_ttls_fake_identity_request();
1320 ret->methodState = METHOD_DONE;
1321 ret->decision = DECISION_FAIL;
1326 if (eap_ttls_phase2_request(sm, data, ret, hdr, &resp)) {
1327 wpa_printf(MSG_INFO, "EAP-TTLS: Phase2 Request "
1328 "processing failed");
1331 struct eap_peer_config *config = eap_get_config(sm);
1333 (config->pending_req_identity ||
1334 config->pending_req_password ||
1335 config->pending_req_otp ||
1336 config->pending_req_new_password ||
1337 config->pending_req_sim)) {
1339 * Use empty buffer to force implicit request
1340 * processing when EAP request is re-processed after
1343 wpabuf_free(data->pending_phase2_req);
1344 data->pending_phase2_req = wpabuf_alloc(0);
1347 retval = eap_ttls_encrypt_response(sm, data, resp, identifier,
1354 ret->methodState = METHOD_DONE;
1355 ret->decision = DECISION_FAIL;
1362 static int eap_ttls_phase2_start(struct eap_sm *sm, struct eap_ttls_data *data,
1363 struct eap_method_ret *ret, u8 identifier,
1364 struct wpabuf **out_data)
1366 data->phase2_start = 0;
1369 * EAP-TTLS does not use Phase2 on fast re-auth; this must be done only
1370 * if TLS part was indeed resuming a previous session. Most
1371 * Authentication Servers terminate EAP-TTLS before reaching this
1372 * point, but some do not. Make wpa_supplicant stop phase 2 here, if
1376 tls_connection_resumed(sm->ssl_ctx, data->ssl.conn)) {
1377 wpa_printf(MSG_DEBUG, "EAP-TTLS: Session resumption - "
1379 *out_data = eap_peer_tls_build_ack(identifier, EAP_TYPE_TTLS,
1380 data->ttls_version);
1381 ret->methodState = METHOD_DONE;
1382 ret->decision = DECISION_UNCOND_SUCC;
1383 data->phase2_success = 1;
1387 return eap_ttls_implicit_identity_request(sm, data, ret, identifier,
1392 static int eap_ttls_decrypt(struct eap_sm *sm, struct eap_ttls_data *data,
1393 struct eap_method_ret *ret, u8 identifier,
1394 const struct wpabuf *in_data,
1395 struct wpabuf **out_data)
1397 struct wpabuf *in_decrypted = NULL;
1399 struct ttls_parse_avp parse;
1401 os_memset(&parse, 0, sizeof(parse));
1403 wpa_printf(MSG_DEBUG, "EAP-TTLS: received %lu bytes encrypted data for"
1405 in_data ? (unsigned long) wpabuf_len(in_data) : 0);
1407 if (data->pending_phase2_req) {
1408 wpa_printf(MSG_DEBUG, "EAP-TTLS: Pending Phase 2 request - "
1409 "skip decryption and use old data");
1410 /* Clear TLS reassembly state. */
1411 eap_peer_tls_reset_input(&data->ssl);
1413 in_decrypted = data->pending_phase2_req;
1414 data->pending_phase2_req = NULL;
1415 if (wpabuf_len(in_decrypted) == 0) {
1416 wpabuf_free(in_decrypted);
1417 return eap_ttls_implicit_identity_request(
1418 sm, data, ret, identifier, out_data);
1423 if ((in_data == NULL || wpabuf_len(in_data) == 0) &&
1424 data->phase2_start) {
1425 return eap_ttls_phase2_start(sm, data, ret, identifier,
1429 if (in_data == NULL || wpabuf_len(in_data) == 0) {
1430 /* Received TLS ACK - requesting more fragments */
1431 return eap_peer_tls_encrypt(sm, &data->ssl, EAP_TYPE_TTLS,
1433 identifier, NULL, out_data);
1436 retval = eap_peer_tls_decrypt(sm, &data->ssl, in_data, &in_decrypted);
1441 data->phase2_start = 0;
1443 if (eap_ttls_parse_avps(in_decrypted, &parse) < 0) {
1448 retval = eap_ttls_process_decrypted(sm, data, ret, identifier,
1449 &parse, in_decrypted, out_data);
1452 wpabuf_free(in_decrypted);
1453 os_free(parse.eapdata);
1456 ret->methodState = METHOD_DONE;
1457 ret->decision = DECISION_FAIL;
1464 static int eap_ttls_process_handshake(struct eap_sm *sm,
1465 struct eap_ttls_data *data,
1466 struct eap_method_ret *ret,
1468 const struct wpabuf *in_data,
1469 struct wpabuf **out_data)
1473 if (sm->waiting_ext_cert_check && data->pending_resp) {
1474 struct eap_peer_config *config = eap_get_config(sm);
1476 if (config->pending_ext_cert_check == EXT_CERT_CHECK_GOOD) {
1477 wpa_printf(MSG_DEBUG,
1478 "EAP-TTLS: External certificate check succeeded - continue handshake");
1479 *out_data = data->pending_resp;
1480 data->pending_resp = NULL;
1481 sm->waiting_ext_cert_check = 0;
1485 if (config->pending_ext_cert_check == EXT_CERT_CHECK_BAD) {
1486 wpa_printf(MSG_DEBUG,
1487 "EAP-TTLS: External certificate check failed - force authentication failure");
1488 ret->methodState = METHOD_DONE;
1489 ret->decision = DECISION_FAIL;
1490 sm->waiting_ext_cert_check = 0;
1494 wpa_printf(MSG_DEBUG,
1495 "EAP-TTLS: Continuing to wait external server certificate validation");
1499 res = eap_peer_tls_process_helper(sm, &data->ssl, EAP_TYPE_TTLS,
1500 data->ttls_version, identifier,
1503 wpa_printf(MSG_DEBUG, "EAP-TTLS: TLS processing failed");
1504 ret->methodState = METHOD_DONE;
1505 ret->decision = DECISION_FAIL;
1509 if (sm->waiting_ext_cert_check) {
1510 wpa_printf(MSG_DEBUG,
1511 "EAP-TTLS: Waiting external server certificate validation");
1512 wpabuf_free(data->pending_resp);
1513 data->pending_resp = *out_data;
1518 if (tls_connection_established(sm->ssl_ctx, data->ssl.conn)) {
1519 wpa_printf(MSG_DEBUG, "EAP-TTLS: TLS done, proceed to "
1521 if (data->resuming) {
1522 wpa_printf(MSG_DEBUG, "EAP-TTLS: fast reauth - may "
1524 ret->decision = DECISION_COND_SUCC;
1525 ret->methodState = METHOD_MAY_CONT;
1527 data->phase2_start = 1;
1528 eap_ttls_v0_derive_key(sm, data);
1530 if (*out_data == NULL || wpabuf_len(*out_data) == 0) {
1531 if (eap_ttls_decrypt(sm, data, ret, identifier,
1533 wpa_printf(MSG_WARNING, "EAP-TTLS: "
1534 "failed to process early "
1535 "start for Phase 2");
1544 * Application data included in the handshake message.
1546 wpabuf_free(data->pending_phase2_req);
1547 data->pending_phase2_req = *out_data;
1549 res = eap_ttls_decrypt(sm, data, ret, identifier, in_data,
1557 static void eap_ttls_check_auth_status(struct eap_sm *sm,
1558 struct eap_ttls_data *data,
1559 struct eap_method_ret *ret)
1561 if (ret->methodState == METHOD_DONE) {
1562 ret->allowNotifications = FALSE;
1563 if (ret->decision == DECISION_UNCOND_SUCC ||
1564 ret->decision == DECISION_COND_SUCC) {
1565 wpa_printf(MSG_DEBUG, "EAP-TTLS: Authentication "
1566 "completed successfully");
1567 data->phase2_success = 1;
1568 data->decision_succ = ret->decision;
1570 if (!data->ready_for_tnc && !data->tnc_started) {
1572 * TNC may be required as the next
1573 * authentication method within the tunnel.
1575 ret->methodState = METHOD_MAY_CONT;
1576 data->ready_for_tnc = 1;
1578 #endif /* EAP_TNC */
1580 } else if (ret->methodState == METHOD_MAY_CONT &&
1581 (ret->decision == DECISION_UNCOND_SUCC ||
1582 ret->decision == DECISION_COND_SUCC)) {
1583 wpa_printf(MSG_DEBUG, "EAP-TTLS: Authentication "
1584 "completed successfully (MAY_CONT)");
1585 data->phase2_success = 1;
1586 data->decision_succ = ret->decision;
1587 } else if (data->decision_succ != DECISION_FAIL &&
1588 data->phase2_success &&
1589 !data->ssl.tls_out) {
1591 * This is needed to cover the case where the final Phase 2
1592 * message gets fragmented since fragmentation clears
1593 * decision back to FAIL.
1595 wpa_printf(MSG_DEBUG,
1596 "EAP-TTLS: Restore success decision after fragmented frame sent completely");
1597 ret->decision = data->decision_succ;
1602 static struct wpabuf * eap_ttls_process(struct eap_sm *sm, void *priv,
1603 struct eap_method_ret *ret,
1604 const struct wpabuf *reqData)
1609 struct wpabuf *resp;
1611 struct eap_ttls_data *data = priv;
1614 pos = eap_peer_tls_process_init(sm, &data->ssl, EAP_TYPE_TTLS, ret,
1615 reqData, &left, &flags);
1618 id = eap_get_id(reqData);
1620 if (flags & EAP_TLS_FLAGS_START) {
1621 wpa_printf(MSG_DEBUG, "EAP-TTLS: Start (server ver=%d, own "
1622 "ver=%d)", flags & EAP_TLS_VERSION_MASK,
1623 data->ttls_version);
1625 /* RFC 5281, Ch. 9.2:
1626 * "This packet MAY contain additional information in the form
1627 * of AVPs, which may provide useful hints to the client"
1628 * For now, ignore any potential extra data.
1633 wpabuf_set(&msg, pos, left);
1636 if (tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
1638 res = eap_ttls_decrypt(sm, data, ret, id, &msg, &resp);
1640 res = eap_ttls_process_handshake(sm, data, ret, id,
1644 eap_ttls_check_auth_status(sm, data, ret);
1646 /* FIX: what about res == -1? Could just move all error processing into
1647 * the other functions and get rid of this res==1 case here. */
1650 return eap_peer_tls_build_ack(id, EAP_TYPE_TTLS,
1651 data->ttls_version);
1657 static Boolean eap_ttls_has_reauth_data(struct eap_sm *sm, void *priv)
1659 struct eap_ttls_data *data = priv;
1660 return tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
1661 data->phase2_success;
1665 static void eap_ttls_deinit_for_reauth(struct eap_sm *sm, void *priv)
1667 struct eap_ttls_data *data = priv;
1669 if (data->phase2_priv && data->phase2_method &&
1670 data->phase2_method->deinit_for_reauth)
1671 data->phase2_method->deinit_for_reauth(sm, data->phase2_priv);
1672 wpabuf_free(data->pending_phase2_req);
1673 data->pending_phase2_req = NULL;
1674 wpabuf_free(data->pending_resp);
1675 data->pending_resp = NULL;
1676 data->decision_succ = DECISION_FAIL;
1678 data->ready_for_tnc = 0;
1679 data->tnc_started = 0;
1680 #endif /* EAP_TNC */
1684 static void * eap_ttls_init_for_reauth(struct eap_sm *sm, void *priv)
1686 struct eap_ttls_data *data = priv;
1687 eap_ttls_free_key(data);
1688 os_free(data->session_id);
1689 data->session_id = NULL;
1690 if (eap_peer_tls_reauth_init(sm, &data->ssl)) {
1694 if (data->phase2_priv && data->phase2_method &&
1695 data->phase2_method->init_for_reauth)
1696 data->phase2_method->init_for_reauth(sm, data->phase2_priv);
1697 data->phase2_start = 0;
1698 data->phase2_success = 0;
1705 static int eap_ttls_get_status(struct eap_sm *sm, void *priv, char *buf,
1706 size_t buflen, int verbose)
1708 struct eap_ttls_data *data = priv;
1711 len = eap_peer_tls_status(sm, &data->ssl, buf, buflen, verbose);
1712 ret = os_snprintf(buf + len, buflen - len,
1713 "EAP-TTLSv%d Phase2 method=",
1714 data->ttls_version);
1715 if (os_snprintf_error(buflen - len, ret))
1718 switch (data->phase2_type) {
1719 case EAP_TTLS_PHASE2_EAP:
1720 ret = os_snprintf(buf + len, buflen - len, "EAP-%s\n",
1721 data->phase2_method ?
1722 data->phase2_method->name : "?");
1724 case EAP_TTLS_PHASE2_MSCHAPV2:
1725 ret = os_snprintf(buf + len, buflen - len, "MSCHAPV2\n");
1727 case EAP_TTLS_PHASE2_MSCHAP:
1728 ret = os_snprintf(buf + len, buflen - len, "MSCHAP\n");
1730 case EAP_TTLS_PHASE2_PAP:
1731 ret = os_snprintf(buf + len, buflen - len, "PAP\n");
1733 case EAP_TTLS_PHASE2_CHAP:
1734 ret = os_snprintf(buf + len, buflen - len, "CHAP\n");
1740 if (os_snprintf_error(buflen - len, ret))
1748 static Boolean eap_ttls_isKeyAvailable(struct eap_sm *sm, void *priv)
1750 struct eap_ttls_data *data = priv;
1751 return data->key_data != NULL && data->phase2_success;
1755 static u8 * eap_ttls_getKey(struct eap_sm *sm, void *priv, size_t *len)
1757 struct eap_ttls_data *data = priv;
1760 if (data->key_data == NULL || !data->phase2_success)
1763 key = os_memdup(data->key_data, EAP_TLS_KEY_LEN);
1767 *len = EAP_TLS_KEY_LEN;
1773 static u8 * eap_ttls_get_session_id(struct eap_sm *sm, void *priv, size_t *len)
1775 struct eap_ttls_data *data = priv;
1778 if (data->session_id == NULL || !data->phase2_success)
1781 id = os_memdup(data->session_id, data->id_len);
1785 *len = data->id_len;
1791 static u8 * eap_ttls_get_emsk(struct eap_sm *sm, void *priv, size_t *len)
1793 struct eap_ttls_data *data = priv;
1796 if (data->key_data == NULL)
1799 key = os_memdup(data->key_data + EAP_TLS_KEY_LEN, EAP_EMSK_LEN);
1803 *len = EAP_EMSK_LEN;
1809 int eap_peer_ttls_register(void)
1811 struct eap_method *eap;
1813 eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
1814 EAP_VENDOR_IETF, EAP_TYPE_TTLS, "TTLS");
1818 eap->init = eap_ttls_init;
1819 eap->deinit = eap_ttls_deinit;
1820 eap->process = eap_ttls_process;
1821 eap->isKeyAvailable = eap_ttls_isKeyAvailable;
1822 eap->getKey = eap_ttls_getKey;
1823 eap->getSessionId = eap_ttls_get_session_id;
1824 eap->get_status = eap_ttls_get_status;
1825 eap->has_reauth_data = eap_ttls_has_reauth_data;
1826 eap->deinit_for_reauth = eap_ttls_deinit_for_reauth;
1827 eap->init_for_reauth = eap_ttls_init_for_reauth;
1828 eap->get_emsk = eap_ttls_get_emsk;
1830 return eap_peer_method_register(eap);