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_clear_free(data->pending_phase2_req);
200 wpabuf_clear_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);
251 wpabuf_clear_free(*resp);
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);
261 wpabuf_clear_free(*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",
277 if (!data->key_data) {
278 wpa_printf(MSG_INFO, "EAP-TTLS: Failed to derive key");
282 wpa_hexdump_key(MSG_DEBUG, "EAP-TTLS: Derived key",
283 data->key_data, EAP_TLS_KEY_LEN);
284 wpa_hexdump_key(MSG_DEBUG, "EAP-TTLS: Derived EMSK",
285 data->key_data + EAP_TLS_KEY_LEN,
288 os_free(data->session_id);
289 data->session_id = eap_peer_tls_derive_session_id(sm, &data->ssl,
292 if (data->session_id) {
293 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: Derived Session-Id",
294 data->session_id, data->id_len);
296 wpa_printf(MSG_ERROR, "EAP-TTLS: Failed to derive Session-Id");
304 static u8 * eap_ttls_implicit_challenge(struct eap_sm *sm,
305 struct eap_ttls_data *data, size_t len)
307 return eap_peer_tls_derive_key(sm, &data->ssl, "ttls challenge",
310 #endif /* CONFIG_FIPS */
313 static void eap_ttls_phase2_select_eap_method(struct eap_ttls_data *data,
317 for (i = 0; i < data->num_phase2_eap_types; i++) {
318 if (data->phase2_eap_types[i].vendor != EAP_VENDOR_IETF ||
319 data->phase2_eap_types[i].method != method)
322 data->phase2_eap_type.vendor =
323 data->phase2_eap_types[i].vendor;
324 data->phase2_eap_type.method =
325 data->phase2_eap_types[i].method;
326 wpa_printf(MSG_DEBUG, "EAP-TTLS: Selected "
327 "Phase 2 EAP vendor %d method %d",
328 data->phase2_eap_type.vendor,
329 data->phase2_eap_type.method);
335 static int eap_ttls_phase2_eap_process(struct eap_sm *sm,
336 struct eap_ttls_data *data,
337 struct eap_method_ret *ret,
338 struct eap_hdr *hdr, size_t len,
339 struct wpabuf **resp)
342 struct eap_method_ret iret;
344 os_memset(&iret, 0, sizeof(iret));
345 wpabuf_set(&msg, hdr, len);
346 *resp = data->phase2_method->process(sm, data->phase2_priv, &iret,
348 if ((iret.methodState == METHOD_DONE ||
349 iret.methodState == METHOD_MAY_CONT) &&
350 (iret.decision == DECISION_UNCOND_SUCC ||
351 iret.decision == DECISION_COND_SUCC ||
352 iret.decision == DECISION_FAIL)) {
353 ret->methodState = iret.methodState;
354 ret->decision = iret.decision;
361 static int eap_ttls_phase2_request_eap_method(struct eap_sm *sm,
362 struct eap_ttls_data *data,
363 struct eap_method_ret *ret,
364 struct eap_hdr *hdr, size_t len,
365 u8 method, struct wpabuf **resp)
368 if (data->tnc_started && data->phase2_method &&
369 data->phase2_priv && method == EAP_TYPE_TNC &&
370 data->phase2_eap_type.method == EAP_TYPE_TNC)
371 return eap_ttls_phase2_eap_process(sm, data, ret, hdr, len,
374 if (data->ready_for_tnc && !data->tnc_started &&
375 method == EAP_TYPE_TNC) {
376 wpa_printf(MSG_DEBUG, "EAP-TTLS: Start TNC after completed "
378 data->tnc_started = 1;
381 if (data->tnc_started) {
382 if (data->phase2_eap_type.vendor != EAP_VENDOR_IETF ||
383 data->phase2_eap_type.method == EAP_TYPE_TNC) {
384 wpa_printf(MSG_DEBUG, "EAP-TTLS: Unexpected EAP "
385 "type %d for TNC", method);
389 data->phase2_eap_type.vendor = EAP_VENDOR_IETF;
390 data->phase2_eap_type.method = method;
391 wpa_printf(MSG_DEBUG, "EAP-TTLS: Selected "
392 "Phase 2 EAP vendor %d method %d (TNC)",
393 data->phase2_eap_type.vendor,
394 data->phase2_eap_type.method);
396 if (data->phase2_type == EAP_TTLS_PHASE2_EAP)
397 eap_ttls_phase2_eap_deinit(sm, data);
401 if (data->phase2_eap_type.vendor == EAP_VENDOR_IETF &&
402 data->phase2_eap_type.method == EAP_TYPE_NONE)
403 eap_ttls_phase2_select_eap_method(data, method);
405 if (method != data->phase2_eap_type.method || method == EAP_TYPE_NONE)
407 if (eap_peer_tls_phase2_nak(data->phase2_eap_types,
408 data->num_phase2_eap_types,
414 if (data->phase2_priv == NULL) {
415 data->phase2_method = eap_peer_get_eap_method(
416 EAP_VENDOR_IETF, method);
417 if (data->phase2_method) {
419 data->phase2_priv = data->phase2_method->init(sm);
423 if (data->phase2_priv == NULL || data->phase2_method == NULL) {
424 wpa_printf(MSG_INFO, "EAP-TTLS: failed to initialize "
425 "Phase 2 EAP method %d", method);
429 return eap_ttls_phase2_eap_process(sm, data, ret, hdr, len, resp);
433 static int eap_ttls_phase2_request_eap(struct eap_sm *sm,
434 struct eap_ttls_data *data,
435 struct eap_method_ret *ret,
437 struct wpabuf **resp)
439 size_t len = be_to_host16(hdr->length);
441 struct eap_peer_config *config = eap_get_config(sm);
443 if (len <= sizeof(struct eap_hdr)) {
444 wpa_printf(MSG_INFO, "EAP-TTLS: too short "
445 "Phase 2 request (len=%lu)", (unsigned long) len);
448 pos = (u8 *) (hdr + 1);
449 wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 EAP Request: type=%d", *pos);
451 case EAP_TYPE_IDENTITY:
452 *resp = eap_sm_buildIdentity(sm, hdr->identifier, 1);
455 if (eap_ttls_phase2_request_eap_method(sm, data, ret, hdr, len,
462 (config->pending_req_identity || config->pending_req_password ||
463 config->pending_req_otp || config->pending_req_sim)) {
470 wpa_hexdump_buf(MSG_DEBUG, "EAP-TTLS: AVP encapsulate EAP Response",
472 return eap_ttls_avp_encapsulate(resp, RADIUS_ATTR_EAP_MESSAGE, 1);
476 static int eap_ttls_phase2_request_mschapv2(struct eap_sm *sm,
477 struct eap_ttls_data *data,
478 struct eap_method_ret *ret,
479 struct wpabuf **resp)
482 wpa_printf(MSG_ERROR, "EAP-TTLS: MSCHAPV2 not supported in FIPS build");
484 #else /* CONFIG_FIPS */
487 u8 *buf, *pos, *challenge, *peer_challenge;
488 const u8 *identity, *password;
489 size_t identity_len, password_len;
492 wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 MSCHAPV2 Request");
494 identity = eap_get_config_identity(sm, &identity_len);
495 password = eap_get_config_password2(sm, &password_len, &pwhash);
496 if (identity == NULL || password == NULL)
499 msg = wpabuf_alloc(identity_len + 1000);
501 wpa_printf(MSG_ERROR,
502 "EAP-TTLS/MSCHAPV2: Failed to allocate memory");
505 pos = buf = wpabuf_mhead(msg);
508 pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_USER_NAME, 0, 1,
509 identity, identity_len);
511 /* MS-CHAP-Challenge */
512 challenge = eap_ttls_implicit_challenge(
513 sm, data, EAP_TTLS_MSCHAPV2_CHALLENGE_LEN + 1);
514 if (challenge == NULL) {
515 wpabuf_clear_free(msg);
516 wpa_printf(MSG_ERROR, "EAP-TTLS/MSCHAPV2: Failed to derive "
517 "implicit challenge");
521 pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_MS_CHAP_CHALLENGE,
522 RADIUS_VENDOR_ID_MICROSOFT, 1,
523 challenge, EAP_TTLS_MSCHAPV2_CHALLENGE_LEN);
525 /* MS-CHAP2-Response */
526 pos = eap_ttls_avp_hdr(pos, RADIUS_ATTR_MS_CHAP2_RESPONSE,
527 RADIUS_VENDOR_ID_MICROSOFT, 1,
528 EAP_TTLS_MSCHAPV2_RESPONSE_LEN);
529 data->ident = challenge[EAP_TTLS_MSCHAPV2_CHALLENGE_LEN];
530 *pos++ = data->ident;
531 *pos++ = 0; /* Flags */
532 if (os_get_random(pos, EAP_TTLS_MSCHAPV2_CHALLENGE_LEN) < 0) {
534 wpabuf_clear_free(msg);
535 wpa_printf(MSG_ERROR, "EAP-TTLS/MSCHAPV2: Failed to get "
536 "random data for peer challenge");
539 peer_challenge = pos;
540 pos += EAP_TTLS_MSCHAPV2_CHALLENGE_LEN;
541 os_memset(pos, 0, 8); /* Reserved, must be zero */
543 if (mschapv2_derive_response(identity, identity_len, password,
544 password_len, pwhash, challenge,
545 peer_challenge, pos, data->auth_response,
548 wpabuf_clear_free(msg);
549 wpa_printf(MSG_ERROR, "EAP-TTLS/MSCHAPV2: Failed to derive "
553 data->auth_response_valid = 1;
559 wpabuf_put(msg, pos - buf);
563 #else /* EAP_MSCHAPv2 */
564 wpa_printf(MSG_ERROR, "EAP-TTLS: MSCHAPv2 not included in the build");
566 #endif /* EAP_MSCHAPv2 */
567 #endif /* CONFIG_FIPS */
571 static int eap_ttls_phase2_request_mschap(struct eap_sm *sm,
572 struct eap_ttls_data *data,
573 struct eap_method_ret *ret,
574 struct wpabuf **resp)
577 wpa_printf(MSG_ERROR, "EAP-TTLS: MSCHAP not supported in FIPS build");
579 #else /* CONFIG_FIPS */
581 u8 *buf, *pos, *challenge;
582 const u8 *identity, *password;
583 size_t identity_len, password_len;
586 wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 MSCHAP Request");
588 identity = eap_get_config_identity(sm, &identity_len);
589 password = eap_get_config_password2(sm, &password_len, &pwhash);
590 if (identity == NULL || password == NULL)
593 msg = wpabuf_alloc(identity_len + 1000);
595 wpa_printf(MSG_ERROR,
596 "EAP-TTLS/MSCHAP: Failed to allocate memory");
599 pos = buf = wpabuf_mhead(msg);
602 pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_USER_NAME, 0, 1,
603 identity, identity_len);
605 /* MS-CHAP-Challenge */
606 challenge = eap_ttls_implicit_challenge(
607 sm, data, EAP_TTLS_MSCHAP_CHALLENGE_LEN + 1);
608 if (challenge == NULL) {
609 wpabuf_clear_free(msg);
610 wpa_printf(MSG_ERROR, "EAP-TTLS/MSCHAP: Failed to derive "
611 "implicit challenge");
615 pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_MS_CHAP_CHALLENGE,
616 RADIUS_VENDOR_ID_MICROSOFT, 1,
617 challenge, EAP_TTLS_MSCHAP_CHALLENGE_LEN);
619 /* MS-CHAP-Response */
620 pos = eap_ttls_avp_hdr(pos, RADIUS_ATTR_MS_CHAP_RESPONSE,
621 RADIUS_VENDOR_ID_MICROSOFT, 1,
622 EAP_TTLS_MSCHAP_RESPONSE_LEN);
623 data->ident = challenge[EAP_TTLS_MSCHAP_CHALLENGE_LEN];
624 *pos++ = data->ident;
625 *pos++ = 1; /* Flags: Use NT style passwords */
626 os_memset(pos, 0, 24); /* LM-Response */
630 if (challenge_response(challenge, password, pos)) {
631 wpa_printf(MSG_ERROR,
632 "EAP-TTLS/MSCHAP: Failed derive password hash");
633 wpabuf_clear_free(msg);
638 wpa_hexdump_key(MSG_DEBUG, "EAP-TTLS: MSCHAP password hash",
642 if (nt_challenge_response(challenge, password, password_len,
644 wpa_printf(MSG_ERROR,
645 "EAP-TTLS/MSCHAP: Failed derive password");
646 wpabuf_clear_free(msg);
651 wpa_hexdump_ascii_key(MSG_DEBUG, "EAP-TTLS: MSCHAP password",
652 password, password_len);
654 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: MSCHAP implicit challenge",
655 challenge, EAP_TTLS_MSCHAP_CHALLENGE_LEN);
656 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: MSCHAP response", pos, 24);
661 wpabuf_put(msg, pos - buf);
664 /* EAP-TTLS/MSCHAP does not provide tunneled success
665 * notification, so assume that Phase2 succeeds. */
666 ret->methodState = METHOD_DONE;
667 ret->decision = DECISION_COND_SUCC;
670 #endif /* CONFIG_FIPS */
674 static int eap_ttls_phase2_request_pap(struct eap_sm *sm,
675 struct eap_ttls_data *data,
676 struct eap_method_ret *ret,
677 struct wpabuf **resp)
682 const u8 *identity, *password;
683 size_t identity_len, password_len;
685 wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 PAP Request");
687 identity = eap_get_config_identity(sm, &identity_len);
688 password = eap_get_config_password(sm, &password_len);
689 if (identity == NULL || password == NULL)
692 msg = wpabuf_alloc(identity_len + password_len + 100);
694 wpa_printf(MSG_ERROR,
695 "EAP-TTLS/PAP: Failed to allocate memory");
698 pos = buf = wpabuf_mhead(msg);
701 pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_USER_NAME, 0, 1,
702 identity, identity_len);
704 /* User-Password; in RADIUS, this is encrypted, but EAP-TTLS encrypts
705 * the data, so no separate encryption is used in the AVP itself.
706 * However, the password is padded to obfuscate its length. */
707 pad = password_len == 0 ? 16 : (16 - (password_len & 15)) & 15;
708 pos = eap_ttls_avp_hdr(pos, RADIUS_ATTR_USER_PASSWORD, 0, 1,
710 os_memcpy(pos, password, password_len);
712 os_memset(pos, 0, pad);
716 wpabuf_put(msg, pos - buf);
719 /* EAP-TTLS/PAP does not provide tunneled success notification,
720 * so assume that Phase2 succeeds. */
721 ret->methodState = METHOD_DONE;
722 ret->decision = DECISION_COND_SUCC;
728 static int eap_ttls_phase2_request_chap(struct eap_sm *sm,
729 struct eap_ttls_data *data,
730 struct eap_method_ret *ret,
731 struct wpabuf **resp)
734 wpa_printf(MSG_ERROR, "EAP-TTLS: CHAP not supported in FIPS build");
736 #else /* CONFIG_FIPS */
738 u8 *buf, *pos, *challenge;
739 const u8 *identity, *password;
740 size_t identity_len, password_len;
742 wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 CHAP Request");
744 identity = eap_get_config_identity(sm, &identity_len);
745 password = eap_get_config_password(sm, &password_len);
746 if (identity == NULL || password == NULL)
749 msg = wpabuf_alloc(identity_len + 1000);
751 wpa_printf(MSG_ERROR,
752 "EAP-TTLS/CHAP: Failed to allocate memory");
755 pos = buf = wpabuf_mhead(msg);
758 pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_USER_NAME, 0, 1,
759 identity, identity_len);
762 challenge = eap_ttls_implicit_challenge(
763 sm, data, EAP_TTLS_CHAP_CHALLENGE_LEN + 1);
764 if (challenge == NULL) {
765 wpabuf_clear_free(msg);
766 wpa_printf(MSG_ERROR, "EAP-TTLS/CHAP: Failed to derive "
767 "implicit challenge");
771 pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_CHAP_CHALLENGE, 0, 1,
772 challenge, EAP_TTLS_CHAP_CHALLENGE_LEN);
775 pos = eap_ttls_avp_hdr(pos, RADIUS_ATTR_CHAP_PASSWORD, 0, 1,
776 1 + EAP_TTLS_CHAP_PASSWORD_LEN);
777 data->ident = challenge[EAP_TTLS_CHAP_CHALLENGE_LEN];
778 *pos++ = data->ident;
780 /* MD5(Ident + Password + Challenge) */
781 chap_md5(data->ident, password, password_len, challenge,
782 EAP_TTLS_CHAP_CHALLENGE_LEN, pos);
784 wpa_hexdump_ascii(MSG_DEBUG, "EAP-TTLS: CHAP username",
785 identity, identity_len);
786 wpa_hexdump_ascii_key(MSG_DEBUG, "EAP-TTLS: CHAP password",
787 password, password_len);
788 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: CHAP implicit challenge",
789 challenge, EAP_TTLS_CHAP_CHALLENGE_LEN);
790 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: CHAP password",
791 pos, EAP_TTLS_CHAP_PASSWORD_LEN);
792 pos += EAP_TTLS_CHAP_PASSWORD_LEN;
796 wpabuf_put(msg, pos - buf);
799 /* EAP-TTLS/CHAP does not provide tunneled success
800 * notification, so assume that Phase2 succeeds. */
801 ret->methodState = METHOD_DONE;
802 ret->decision = DECISION_COND_SUCC;
805 #endif /* CONFIG_FIPS */
809 static int eap_ttls_phase2_request(struct eap_sm *sm,
810 struct eap_ttls_data *data,
811 struct eap_method_ret *ret,
813 struct wpabuf **resp)
817 enum phase2_types phase2_type = data->phase2_type;
820 if (data->tnc_started) {
821 wpa_printf(MSG_DEBUG, "EAP-TTLS: Processing TNC");
822 phase2_type = EAP_TTLS_PHASE2_EAP;
826 if (phase2_type == EAP_TTLS_PHASE2_MSCHAPV2 ||
827 phase2_type == EAP_TTLS_PHASE2_MSCHAP ||
828 phase2_type == EAP_TTLS_PHASE2_PAP ||
829 phase2_type == EAP_TTLS_PHASE2_CHAP) {
830 if (eap_get_config_identity(sm, &len) == NULL) {
832 "EAP-TTLS: Identity not configured");
833 eap_sm_request_identity(sm);
834 if (eap_get_config_password(sm, &len) == NULL)
835 eap_sm_request_password(sm);
839 if (eap_get_config_password(sm, &len) == NULL) {
841 "EAP-TTLS: Password not configured");
842 eap_sm_request_password(sm);
847 switch (phase2_type) {
848 case EAP_TTLS_PHASE2_EAP:
849 res = eap_ttls_phase2_request_eap(sm, data, ret, hdr, resp);
851 case EAP_TTLS_PHASE2_MSCHAPV2:
852 res = eap_ttls_phase2_request_mschapv2(sm, data, ret, resp);
854 case EAP_TTLS_PHASE2_MSCHAP:
855 res = eap_ttls_phase2_request_mschap(sm, data, ret, resp);
857 case EAP_TTLS_PHASE2_PAP:
858 res = eap_ttls_phase2_request_pap(sm, data, ret, resp);
860 case EAP_TTLS_PHASE2_CHAP:
861 res = eap_ttls_phase2_request_chap(sm, data, ret, resp);
864 wpa_printf(MSG_ERROR, "EAP-TTLS: Phase 2 - Unknown");
870 ret->methodState = METHOD_DONE;
871 ret->decision = DECISION_FAIL;
878 struct ttls_parse_avp {
886 static int eap_ttls_parse_attr_eap(const u8 *dpos, size_t dlen,
887 struct ttls_parse_avp *parse)
889 wpa_printf(MSG_DEBUG, "EAP-TTLS: AVP - EAP Message");
890 if (parse->eapdata == NULL) {
891 parse->eapdata = os_memdup(dpos, dlen);
892 if (parse->eapdata == NULL) {
893 wpa_printf(MSG_WARNING, "EAP-TTLS: Failed to allocate "
894 "memory for Phase 2 EAP data");
897 parse->eap_len = dlen;
899 u8 *neweap = os_realloc(parse->eapdata, parse->eap_len + dlen);
900 if (neweap == NULL) {
901 wpa_printf(MSG_WARNING, "EAP-TTLS: Failed to allocate "
902 "memory for Phase 2 EAP data");
905 os_memcpy(neweap + parse->eap_len, dpos, dlen);
906 parse->eapdata = neweap;
907 parse->eap_len += dlen;
914 static int eap_ttls_parse_avp(u8 *pos, size_t left,
915 struct ttls_parse_avp *parse)
917 struct ttls_avp *avp;
918 u32 avp_code, avp_length, vendor_id = 0;
922 avp = (struct ttls_avp *) pos;
923 avp_code = be_to_host32(avp->avp_code);
924 avp_length = be_to_host32(avp->avp_length);
925 avp_flags = (avp_length >> 24) & 0xff;
926 avp_length &= 0xffffff;
927 wpa_printf(MSG_DEBUG, "EAP-TTLS: AVP: code=%d flags=0x%02x "
928 "length=%d", (int) avp_code, avp_flags,
931 if (avp_length > left) {
932 wpa_printf(MSG_WARNING, "EAP-TTLS: AVP overflow "
933 "(len=%d, left=%lu) - dropped",
934 (int) avp_length, (unsigned long) left);
938 if (avp_length < sizeof(*avp)) {
939 wpa_printf(MSG_WARNING, "EAP-TTLS: Invalid AVP length %d",
944 dpos = (u8 *) (avp + 1);
945 dlen = avp_length - sizeof(*avp);
946 if (avp_flags & AVP_FLAGS_VENDOR) {
948 wpa_printf(MSG_WARNING, "EAP-TTLS: Vendor AVP "
952 vendor_id = WPA_GET_BE32(dpos);
953 wpa_printf(MSG_DEBUG, "EAP-TTLS: AVP vendor_id %d",
959 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: AVP data", dpos, dlen);
961 if (vendor_id == 0 && avp_code == RADIUS_ATTR_EAP_MESSAGE) {
962 if (eap_ttls_parse_attr_eap(dpos, dlen, parse) < 0)
964 } else if (vendor_id == 0 && avp_code == RADIUS_ATTR_REPLY_MESSAGE) {
965 /* This is an optional message that can be displayed to
967 wpa_hexdump_ascii(MSG_DEBUG, "EAP-TTLS: AVP - Reply-Message",
969 } else if (vendor_id == RADIUS_VENDOR_ID_MICROSOFT &&
970 avp_code == RADIUS_ATTR_MS_CHAP2_SUCCESS) {
971 wpa_hexdump_ascii(MSG_DEBUG, "EAP-TTLS: MS-CHAP2-Success",
974 wpa_printf(MSG_WARNING, "EAP-TTLS: Unexpected "
975 "MS-CHAP2-Success length "
976 "(len=%lu, expected 43)",
977 (unsigned long) dlen);
980 parse->mschapv2 = dpos;
981 } else if (vendor_id == RADIUS_VENDOR_ID_MICROSOFT &&
982 avp_code == RADIUS_ATTR_MS_CHAP_ERROR) {
983 wpa_hexdump_ascii(MSG_DEBUG, "EAP-TTLS: MS-CHAP-Error",
985 parse->mschapv2_error = 1;
986 } else if (avp_flags & AVP_FLAGS_MANDATORY) {
987 wpa_printf(MSG_WARNING, "EAP-TTLS: Unsupported mandatory AVP "
988 "code %d vendor_id %d - dropped",
989 (int) avp_code, (int) vendor_id);
992 wpa_printf(MSG_DEBUG, "EAP-TTLS: Ignoring unsupported AVP "
993 "code %d vendor_id %d",
994 (int) avp_code, (int) vendor_id);
1001 static int eap_ttls_parse_avps(struct wpabuf *in_decrypted,
1002 struct ttls_parse_avp *parse)
1008 pos = wpabuf_mhead(in_decrypted);
1009 left = wpabuf_len(in_decrypted);
1010 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: Decrypted Phase 2 AVPs", pos, left);
1011 if (left < sizeof(struct ttls_avp)) {
1012 wpa_printf(MSG_WARNING, "EAP-TTLS: Too short Phase 2 AVP frame"
1013 " len=%lu expected %lu or more - dropped",
1014 (unsigned long) left,
1015 (unsigned long) sizeof(struct ttls_avp));
1020 os_memset(parse, 0, sizeof(*parse));
1023 avp_length = eap_ttls_parse_avp(pos, left, parse);
1027 pad = (4 - (avp_length & 3)) & 3;
1028 pos += avp_length + pad;
1029 if (left < avp_length + pad)
1032 left -= avp_length + pad;
1039 static u8 * eap_ttls_fake_identity_request(void)
1041 struct eap_hdr *hdr;
1044 wpa_printf(MSG_DEBUG, "EAP-TTLS: empty data in beginning of "
1045 "Phase 2 - use fake EAP-Request Identity");
1046 buf = os_malloc(sizeof(*hdr) + 1);
1048 wpa_printf(MSG_WARNING, "EAP-TTLS: failed to allocate "
1049 "memory for fake EAP-Identity Request");
1053 hdr = (struct eap_hdr *) buf;
1054 hdr->code = EAP_CODE_REQUEST;
1055 hdr->identifier = 0;
1056 hdr->length = host_to_be16(sizeof(*hdr) + 1);
1057 buf[sizeof(*hdr)] = EAP_TYPE_IDENTITY;
1063 static int eap_ttls_encrypt_response(struct eap_sm *sm,
1064 struct eap_ttls_data *data,
1065 struct wpabuf *resp, u8 identifier,
1066 struct wpabuf **out_data)
1071 wpa_hexdump_buf_key(MSG_DEBUG, "EAP-TTLS: Encrypting Phase 2 data",
1073 if (eap_peer_tls_encrypt(sm, &data->ssl, EAP_TYPE_TTLS,
1074 data->ttls_version, identifier,
1076 wpa_printf(MSG_INFO, "EAP-TTLS: Failed to encrypt a Phase 2 "
1078 wpabuf_clear_free(resp);
1081 wpabuf_clear_free(resp);
1087 static int eap_ttls_process_phase2_eap(struct eap_sm *sm,
1088 struct eap_ttls_data *data,
1089 struct eap_method_ret *ret,
1090 struct ttls_parse_avp *parse,
1091 struct wpabuf **resp)
1093 struct eap_hdr *hdr;
1096 if (parse->eapdata == NULL) {
1097 wpa_printf(MSG_WARNING, "EAP-TTLS: No EAP Message in the "
1098 "packet - dropped");
1102 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: Phase 2 EAP",
1103 parse->eapdata, parse->eap_len);
1104 hdr = (struct eap_hdr *) parse->eapdata;
1106 if (parse->eap_len < sizeof(*hdr)) {
1107 wpa_printf(MSG_WARNING, "EAP-TTLS: Too short Phase 2 EAP "
1108 "frame (len=%lu, expected %lu or more) - dropped",
1109 (unsigned long) parse->eap_len,
1110 (unsigned long) sizeof(*hdr));
1113 len = be_to_host16(hdr->length);
1114 if (len > parse->eap_len) {
1115 wpa_printf(MSG_INFO, "EAP-TTLS: Length mismatch in Phase 2 "
1116 "EAP frame (EAP hdr len=%lu, EAP data len in "
1118 (unsigned long) len,
1119 (unsigned long) parse->eap_len);
1122 wpa_printf(MSG_DEBUG, "EAP-TTLS: received Phase 2: code=%d "
1123 "identifier=%d length=%lu",
1124 hdr->code, hdr->identifier, (unsigned long) len);
1125 switch (hdr->code) {
1126 case EAP_CODE_REQUEST:
1127 if (eap_ttls_phase2_request(sm, data, ret, hdr, resp)) {
1128 wpa_printf(MSG_INFO, "EAP-TTLS: Phase2 Request "
1129 "processing failed");
1134 wpa_printf(MSG_INFO, "EAP-TTLS: Unexpected code=%d in "
1135 "Phase 2 EAP header", hdr->code);
1143 static int eap_ttls_process_phase2_mschapv2(struct eap_sm *sm,
1144 struct eap_ttls_data *data,
1145 struct eap_method_ret *ret,
1146 struct ttls_parse_avp *parse)
1149 if (parse->mschapv2_error) {
1150 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2: Received "
1151 "MS-CHAP-Error - failed");
1152 ret->methodState = METHOD_DONE;
1153 ret->decision = DECISION_FAIL;
1154 /* Reply with empty data to ACK error */
1158 if (parse->mschapv2 == NULL) {
1160 if (data->phase2_success && parse->eapdata) {
1162 * Allow EAP-TNC to be started after successfully
1163 * completed MSCHAPV2.
1167 #endif /* EAP_TNC */
1168 wpa_printf(MSG_WARNING, "EAP-TTLS: no MS-CHAP2-Success AVP "
1169 "received for Phase2 MSCHAPV2");
1172 if (parse->mschapv2[0] != data->ident) {
1173 wpa_printf(MSG_WARNING, "EAP-TTLS: Ident mismatch for Phase 2 "
1174 "MSCHAPV2 (received Ident 0x%02x, expected 0x%02x)",
1175 parse->mschapv2[0], data->ident);
1178 if (!data->auth_response_valid ||
1179 mschapv2_verify_auth_response(data->auth_response,
1180 parse->mschapv2 + 1, 42)) {
1181 wpa_printf(MSG_WARNING, "EAP-TTLS: Invalid authenticator "
1182 "response in Phase 2 MSCHAPV2 success request");
1186 wpa_printf(MSG_INFO, "EAP-TTLS: Phase 2 MSCHAPV2 "
1187 "authentication succeeded");
1188 ret->methodState = METHOD_DONE;
1189 ret->decision = DECISION_UNCOND_SUCC;
1190 data->phase2_success = 1;
1193 * Reply with empty data; authentication server will reply
1194 * with EAP-Success after this.
1197 #else /* EAP_MSCHAPv2 */
1198 wpa_printf(MSG_ERROR, "EAP-TTLS: MSCHAPv2 not included in the build");
1200 #endif /* EAP_MSCHAPv2 */
1205 static int eap_ttls_process_tnc_start(struct eap_sm *sm,
1206 struct eap_ttls_data *data,
1207 struct eap_method_ret *ret,
1208 struct ttls_parse_avp *parse,
1209 struct wpabuf **resp)
1211 /* TNC uses inner EAP method after non-EAP TTLS phase 2. */
1212 if (parse->eapdata == NULL) {
1213 wpa_printf(MSG_INFO, "EAP-TTLS: Phase 2 received "
1214 "unexpected tunneled data (no EAP)");
1218 if (!data->ready_for_tnc) {
1219 wpa_printf(MSG_INFO, "EAP-TTLS: Phase 2 received "
1220 "EAP after non-EAP, but not ready for TNC");
1224 wpa_printf(MSG_DEBUG, "EAP-TTLS: Start TNC after completed "
1226 data->tnc_started = 1;
1228 if (eap_ttls_process_phase2_eap(sm, data, ret, parse, resp) < 0)
1233 #endif /* EAP_TNC */
1236 static int eap_ttls_process_decrypted(struct eap_sm *sm,
1237 struct eap_ttls_data *data,
1238 struct eap_method_ret *ret,
1240 struct ttls_parse_avp *parse,
1241 struct wpabuf *in_decrypted,
1242 struct wpabuf **out_data)
1244 struct wpabuf *resp = NULL;
1245 struct eap_peer_config *config = eap_get_config(sm);
1247 enum phase2_types phase2_type = data->phase2_type;
1250 if (data->tnc_started)
1251 phase2_type = EAP_TTLS_PHASE2_EAP;
1252 #endif /* EAP_TNC */
1254 switch (phase2_type) {
1255 case EAP_TTLS_PHASE2_EAP:
1256 if (eap_ttls_process_phase2_eap(sm, data, ret, parse, &resp) <
1260 case EAP_TTLS_PHASE2_MSCHAPV2:
1261 res = eap_ttls_process_phase2_mschapv2(sm, data, ret, parse);
1263 if (res == 1 && parse->eapdata && data->phase2_success) {
1265 * TNC may be required as the next
1266 * authentication method within the tunnel.
1268 ret->methodState = METHOD_MAY_CONT;
1269 data->ready_for_tnc = 1;
1270 if (eap_ttls_process_tnc_start(sm, data, ret, parse,
1274 #endif /* EAP_TNC */
1276 case EAP_TTLS_PHASE2_MSCHAP:
1277 case EAP_TTLS_PHASE2_PAP:
1278 case EAP_TTLS_PHASE2_CHAP:
1280 if (eap_ttls_process_tnc_start(sm, data, ret, parse, &resp) <
1285 /* EAP-TTLS/{MSCHAP,PAP,CHAP} should not send any TLS tunneled
1286 * requests to the supplicant */
1287 wpa_printf(MSG_INFO, "EAP-TTLS: Phase 2 received unexpected "
1290 #endif /* EAP_TNC */
1294 if (eap_ttls_encrypt_response(sm, data, resp, identifier,
1297 } else if (config->pending_req_identity ||
1298 config->pending_req_password ||
1299 config->pending_req_otp ||
1300 config->pending_req_new_password ||
1301 config->pending_req_sim) {
1302 wpabuf_clear_free(data->pending_phase2_req);
1303 data->pending_phase2_req = wpabuf_dup(in_decrypted);
1310 static int eap_ttls_implicit_identity_request(struct eap_sm *sm,
1311 struct eap_ttls_data *data,
1312 struct eap_method_ret *ret,
1314 struct wpabuf **out_data)
1317 struct eap_hdr *hdr;
1318 struct wpabuf *resp;
1320 hdr = (struct eap_hdr *) eap_ttls_fake_identity_request();
1322 ret->methodState = METHOD_DONE;
1323 ret->decision = DECISION_FAIL;
1328 if (eap_ttls_phase2_request(sm, data, ret, hdr, &resp)) {
1329 wpa_printf(MSG_INFO, "EAP-TTLS: Phase2 Request "
1330 "processing failed");
1333 struct eap_peer_config *config = eap_get_config(sm);
1335 (config->pending_req_identity ||
1336 config->pending_req_password ||
1337 config->pending_req_otp ||
1338 config->pending_req_new_password ||
1339 config->pending_req_sim)) {
1341 * Use empty buffer to force implicit request
1342 * processing when EAP request is re-processed after
1345 wpabuf_clear_free(data->pending_phase2_req);
1346 data->pending_phase2_req = wpabuf_alloc(0);
1349 retval = eap_ttls_encrypt_response(sm, data, resp, identifier,
1356 ret->methodState = METHOD_DONE;
1357 ret->decision = DECISION_FAIL;
1364 static int eap_ttls_phase2_start(struct eap_sm *sm, struct eap_ttls_data *data,
1365 struct eap_method_ret *ret, u8 identifier,
1366 struct wpabuf **out_data)
1368 data->phase2_start = 0;
1371 * EAP-TTLS does not use Phase2 on fast re-auth; this must be done only
1372 * if TLS part was indeed resuming a previous session. Most
1373 * Authentication Servers terminate EAP-TTLS before reaching this
1374 * point, but some do not. Make wpa_supplicant stop phase 2 here, if
1378 tls_connection_resumed(sm->ssl_ctx, data->ssl.conn)) {
1379 wpa_printf(MSG_DEBUG, "EAP-TTLS: Session resumption - "
1381 *out_data = eap_peer_tls_build_ack(identifier, EAP_TYPE_TTLS,
1382 data->ttls_version);
1383 ret->methodState = METHOD_DONE;
1384 ret->decision = DECISION_UNCOND_SUCC;
1385 data->phase2_success = 1;
1389 return eap_ttls_implicit_identity_request(sm, data, ret, identifier,
1394 static int eap_ttls_decrypt(struct eap_sm *sm, struct eap_ttls_data *data,
1395 struct eap_method_ret *ret, u8 identifier,
1396 const struct wpabuf *in_data,
1397 struct wpabuf **out_data)
1399 struct wpabuf *in_decrypted = NULL;
1401 struct ttls_parse_avp parse;
1403 os_memset(&parse, 0, sizeof(parse));
1405 wpa_printf(MSG_DEBUG, "EAP-TTLS: received %lu bytes encrypted data for"
1407 in_data ? (unsigned long) wpabuf_len(in_data) : 0);
1409 if (data->pending_phase2_req) {
1410 wpa_printf(MSG_DEBUG, "EAP-TTLS: Pending Phase 2 request - "
1411 "skip decryption and use old data");
1412 /* Clear TLS reassembly state. */
1413 eap_peer_tls_reset_input(&data->ssl);
1415 in_decrypted = data->pending_phase2_req;
1416 data->pending_phase2_req = NULL;
1417 if (wpabuf_len(in_decrypted) == 0) {
1418 wpabuf_clear_free(in_decrypted);
1419 return eap_ttls_implicit_identity_request(
1420 sm, data, ret, identifier, out_data);
1425 if ((in_data == NULL || wpabuf_len(in_data) == 0) &&
1426 data->phase2_start) {
1427 return eap_ttls_phase2_start(sm, data, ret, identifier,
1431 if (in_data == NULL || wpabuf_len(in_data) == 0) {
1432 /* Received TLS ACK - requesting more fragments */
1433 return eap_peer_tls_encrypt(sm, &data->ssl, EAP_TYPE_TTLS,
1435 identifier, NULL, out_data);
1438 retval = eap_peer_tls_decrypt(sm, &data->ssl, in_data, &in_decrypted);
1443 data->phase2_start = 0;
1445 if (eap_ttls_parse_avps(in_decrypted, &parse) < 0) {
1450 retval = eap_ttls_process_decrypted(sm, data, ret, identifier,
1451 &parse, in_decrypted, out_data);
1454 wpabuf_clear_free(in_decrypted);
1455 os_free(parse.eapdata);
1458 ret->methodState = METHOD_DONE;
1459 ret->decision = DECISION_FAIL;
1466 static int eap_ttls_process_handshake(struct eap_sm *sm,
1467 struct eap_ttls_data *data,
1468 struct eap_method_ret *ret,
1470 const struct wpabuf *in_data,
1471 struct wpabuf **out_data)
1475 if (sm->waiting_ext_cert_check && data->pending_resp) {
1476 struct eap_peer_config *config = eap_get_config(sm);
1478 if (config->pending_ext_cert_check == EXT_CERT_CHECK_GOOD) {
1479 wpa_printf(MSG_DEBUG,
1480 "EAP-TTLS: External certificate check succeeded - continue handshake");
1481 *out_data = data->pending_resp;
1482 data->pending_resp = NULL;
1483 sm->waiting_ext_cert_check = 0;
1487 if (config->pending_ext_cert_check == EXT_CERT_CHECK_BAD) {
1488 wpa_printf(MSG_DEBUG,
1489 "EAP-TTLS: External certificate check failed - force authentication failure");
1490 ret->methodState = METHOD_DONE;
1491 ret->decision = DECISION_FAIL;
1492 sm->waiting_ext_cert_check = 0;
1496 wpa_printf(MSG_DEBUG,
1497 "EAP-TTLS: Continuing to wait external server certificate validation");
1501 res = eap_peer_tls_process_helper(sm, &data->ssl, EAP_TYPE_TTLS,
1502 data->ttls_version, identifier,
1505 wpa_printf(MSG_DEBUG, "EAP-TTLS: TLS processing failed");
1506 ret->methodState = METHOD_DONE;
1507 ret->decision = DECISION_FAIL;
1511 if (sm->waiting_ext_cert_check) {
1512 wpa_printf(MSG_DEBUG,
1513 "EAP-TTLS: Waiting external server certificate validation");
1514 wpabuf_clear_free(data->pending_resp);
1515 data->pending_resp = *out_data;
1520 if (tls_connection_established(sm->ssl_ctx, data->ssl.conn)) {
1521 wpa_printf(MSG_DEBUG, "EAP-TTLS: TLS done, proceed to "
1523 if (data->resuming) {
1524 wpa_printf(MSG_DEBUG, "EAP-TTLS: fast reauth - may "
1526 ret->decision = DECISION_COND_SUCC;
1527 ret->methodState = METHOD_MAY_CONT;
1529 data->phase2_start = 1;
1530 eap_ttls_v0_derive_key(sm, data);
1532 if (*out_data == NULL || wpabuf_len(*out_data) == 0) {
1533 if (eap_ttls_decrypt(sm, data, ret, identifier,
1535 wpa_printf(MSG_WARNING, "EAP-TTLS: "
1536 "failed to process early "
1537 "start for Phase 2");
1546 * Application data included in the handshake message.
1548 wpabuf_clear_free(data->pending_phase2_req);
1549 data->pending_phase2_req = *out_data;
1551 res = eap_ttls_decrypt(sm, data, ret, identifier, in_data,
1559 static void eap_ttls_check_auth_status(struct eap_sm *sm,
1560 struct eap_ttls_data *data,
1561 struct eap_method_ret *ret)
1563 if (ret->methodState == METHOD_DONE) {
1564 ret->allowNotifications = FALSE;
1565 if (ret->decision == DECISION_UNCOND_SUCC ||
1566 ret->decision == DECISION_COND_SUCC) {
1567 wpa_printf(MSG_DEBUG, "EAP-TTLS: Authentication "
1568 "completed successfully");
1569 data->phase2_success = 1;
1570 data->decision_succ = ret->decision;
1572 if (!data->ready_for_tnc && !data->tnc_started) {
1574 * TNC may be required as the next
1575 * authentication method within the tunnel.
1577 ret->methodState = METHOD_MAY_CONT;
1578 data->ready_for_tnc = 1;
1580 #endif /* EAP_TNC */
1582 } else if (ret->methodState == METHOD_MAY_CONT &&
1583 (ret->decision == DECISION_UNCOND_SUCC ||
1584 ret->decision == DECISION_COND_SUCC)) {
1585 wpa_printf(MSG_DEBUG, "EAP-TTLS: Authentication "
1586 "completed successfully (MAY_CONT)");
1587 data->phase2_success = 1;
1588 data->decision_succ = ret->decision;
1589 } else if (data->decision_succ != DECISION_FAIL &&
1590 data->phase2_success &&
1591 !data->ssl.tls_out) {
1593 * This is needed to cover the case where the final Phase 2
1594 * message gets fragmented since fragmentation clears
1595 * decision back to FAIL.
1597 wpa_printf(MSG_DEBUG,
1598 "EAP-TTLS: Restore success decision after fragmented frame sent completely");
1599 ret->decision = data->decision_succ;
1604 static struct wpabuf * eap_ttls_process(struct eap_sm *sm, void *priv,
1605 struct eap_method_ret *ret,
1606 const struct wpabuf *reqData)
1611 struct wpabuf *resp;
1613 struct eap_ttls_data *data = priv;
1616 pos = eap_peer_tls_process_init(sm, &data->ssl, EAP_TYPE_TTLS, ret,
1617 reqData, &left, &flags);
1620 id = eap_get_id(reqData);
1622 if (flags & EAP_TLS_FLAGS_START) {
1623 wpa_printf(MSG_DEBUG, "EAP-TTLS: Start (server ver=%d, own "
1624 "ver=%d)", flags & EAP_TLS_VERSION_MASK,
1625 data->ttls_version);
1627 /* RFC 5281, Ch. 9.2:
1628 * "This packet MAY contain additional information in the form
1629 * of AVPs, which may provide useful hints to the client"
1630 * For now, ignore any potential extra data.
1635 wpabuf_set(&msg, pos, left);
1638 if (tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
1640 res = eap_ttls_decrypt(sm, data, ret, id, &msg, &resp);
1642 res = eap_ttls_process_handshake(sm, data, ret, id,
1646 eap_ttls_check_auth_status(sm, data, ret);
1648 /* FIX: what about res == -1? Could just move all error processing into
1649 * the other functions and get rid of this res==1 case here. */
1651 wpabuf_clear_free(resp);
1652 return eap_peer_tls_build_ack(id, EAP_TYPE_TTLS,
1653 data->ttls_version);
1659 static Boolean eap_ttls_has_reauth_data(struct eap_sm *sm, void *priv)
1661 struct eap_ttls_data *data = priv;
1662 return tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
1663 data->phase2_success;
1667 static void eap_ttls_deinit_for_reauth(struct eap_sm *sm, void *priv)
1669 struct eap_ttls_data *data = priv;
1671 if (data->phase2_priv && data->phase2_method &&
1672 data->phase2_method->deinit_for_reauth)
1673 data->phase2_method->deinit_for_reauth(sm, data->phase2_priv);
1674 wpabuf_clear_free(data->pending_phase2_req);
1675 data->pending_phase2_req = NULL;
1676 wpabuf_clear_free(data->pending_resp);
1677 data->pending_resp = NULL;
1678 data->decision_succ = DECISION_FAIL;
1680 data->ready_for_tnc = 0;
1681 data->tnc_started = 0;
1682 #endif /* EAP_TNC */
1686 static void * eap_ttls_init_for_reauth(struct eap_sm *sm, void *priv)
1688 struct eap_ttls_data *data = priv;
1689 eap_ttls_free_key(data);
1690 os_free(data->session_id);
1691 data->session_id = NULL;
1692 if (eap_peer_tls_reauth_init(sm, &data->ssl)) {
1696 if (data->phase2_priv && data->phase2_method &&
1697 data->phase2_method->init_for_reauth)
1698 data->phase2_method->init_for_reauth(sm, data->phase2_priv);
1699 data->phase2_start = 0;
1700 data->phase2_success = 0;
1707 static int eap_ttls_get_status(struct eap_sm *sm, void *priv, char *buf,
1708 size_t buflen, int verbose)
1710 struct eap_ttls_data *data = priv;
1713 len = eap_peer_tls_status(sm, &data->ssl, buf, buflen, verbose);
1714 ret = os_snprintf(buf + len, buflen - len,
1715 "EAP-TTLSv%d Phase2 method=",
1716 data->ttls_version);
1717 if (os_snprintf_error(buflen - len, ret))
1720 switch (data->phase2_type) {
1721 case EAP_TTLS_PHASE2_EAP:
1722 ret = os_snprintf(buf + len, buflen - len, "EAP-%s\n",
1723 data->phase2_method ?
1724 data->phase2_method->name : "?");
1726 case EAP_TTLS_PHASE2_MSCHAPV2:
1727 ret = os_snprintf(buf + len, buflen - len, "MSCHAPV2\n");
1729 case EAP_TTLS_PHASE2_MSCHAP:
1730 ret = os_snprintf(buf + len, buflen - len, "MSCHAP\n");
1732 case EAP_TTLS_PHASE2_PAP:
1733 ret = os_snprintf(buf + len, buflen - len, "PAP\n");
1735 case EAP_TTLS_PHASE2_CHAP:
1736 ret = os_snprintf(buf + len, buflen - len, "CHAP\n");
1742 if (os_snprintf_error(buflen - len, ret))
1750 static Boolean eap_ttls_isKeyAvailable(struct eap_sm *sm, void *priv)
1752 struct eap_ttls_data *data = priv;
1753 return data->key_data != NULL && data->phase2_success;
1757 static u8 * eap_ttls_getKey(struct eap_sm *sm, void *priv, size_t *len)
1759 struct eap_ttls_data *data = priv;
1762 if (data->key_data == NULL || !data->phase2_success)
1765 key = os_memdup(data->key_data, EAP_TLS_KEY_LEN);
1769 *len = EAP_TLS_KEY_LEN;
1775 static u8 * eap_ttls_get_session_id(struct eap_sm *sm, void *priv, size_t *len)
1777 struct eap_ttls_data *data = priv;
1780 if (data->session_id == NULL || !data->phase2_success)
1783 id = os_memdup(data->session_id, data->id_len);
1787 *len = data->id_len;
1793 static u8 * eap_ttls_get_emsk(struct eap_sm *sm, void *priv, size_t *len)
1795 struct eap_ttls_data *data = priv;
1798 if (data->key_data == NULL)
1801 key = os_memdup(data->key_data + EAP_TLS_KEY_LEN, EAP_EMSK_LEN);
1805 *len = EAP_EMSK_LEN;
1811 int eap_peer_ttls_register(void)
1813 struct eap_method *eap;
1815 eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
1816 EAP_VENDOR_IETF, EAP_TYPE_TTLS, "TTLS");
1820 eap->init = eap_ttls_init;
1821 eap->deinit = eap_ttls_deinit;
1822 eap->process = eap_ttls_process;
1823 eap->isKeyAvailable = eap_ttls_isKeyAvailable;
1824 eap->getKey = eap_ttls_getKey;
1825 eap->getSessionId = eap_ttls_get_session_id;
1826 eap->get_status = eap_ttls_get_status;
1827 eap->has_reauth_data = eap_ttls_has_reauth_data;
1828 eap->deinit_for_reauth = eap_ttls_deinit_for_reauth;
1829 eap->init_for_reauth = eap_ttls_init_for_reauth;
1830 eap->get_emsk = eap_ttls_get_emsk;
1832 return eap_peer_method_register(eap);