2 * EAP peer method: EAP-EKE (RFC 6124)
3 * Copyright (c) 2013, 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/random.h"
13 #include "eap_peer/eap_i.h"
14 #include "eap_common/eap_eke_common.h"
18 IDENTITY, COMMIT, CONFIRM, SUCCESS, FAILURE
21 u8 emsk[EAP_EMSK_LEN];
26 u8 dh_priv[EAP_EKE_MAX_DH_LEN];
27 struct eap_eke_session sess;
28 u8 nonce_p[EAP_EKE_MAX_NONCE_LEN];
29 u8 nonce_s[EAP_EKE_MAX_NONCE_LEN];
31 u8 dhgroup; /* forced DH group or 0 to allow all supported */
32 u8 encr; /* forced encryption algorithm or 0 to allow all supported */
33 u8 prf; /* forced PRF or 0 to allow all supported */
34 u8 mac; /* forced MAC or 0 to allow all supported */
38 static const char * eap_eke_state_txt(int state)
57 static void eap_eke_state(struct eap_eke_data *data, int state)
59 wpa_printf(MSG_DEBUG, "EAP-EKE: %s -> %s",
60 eap_eke_state_txt(data->state), eap_eke_state_txt(state));
65 static void eap_eke_deinit(struct eap_sm *sm, void *priv);
68 static void * eap_eke_init(struct eap_sm *sm)
70 struct eap_eke_data *data;
71 const u8 *identity, *password;
72 size_t identity_len, password_len;
75 password = eap_get_config_password(sm, &password_len);
77 wpa_printf(MSG_INFO, "EAP-EKE: No password configured");
81 data = os_zalloc(sizeof(*data));
84 eap_eke_state(data, IDENTITY);
86 identity = eap_get_config_identity(sm, &identity_len);
88 data->peerid = os_malloc(identity_len);
89 if (data->peerid == NULL) {
90 eap_eke_deinit(sm, data);
93 os_memcpy(data->peerid, identity, identity_len);
94 data->peerid_len = identity_len;
97 phase1 = eap_get_config_phase1(sm);
101 pos = os_strstr(phase1, "dhgroup=");
103 data->dhgroup = atoi(pos + 8);
104 wpa_printf(MSG_DEBUG, "EAP-EKE: Forced dhgroup %u",
108 pos = os_strstr(phase1, "encr=");
110 data->encr = atoi(pos + 5);
111 wpa_printf(MSG_DEBUG, "EAP-EKE: Forced encr %u",
115 pos = os_strstr(phase1, "prf=");
117 data->prf = atoi(pos + 4);
118 wpa_printf(MSG_DEBUG, "EAP-EKE: Forced prf %u",
122 pos = os_strstr(phase1, "mac=");
124 data->mac = atoi(pos + 4);
125 wpa_printf(MSG_DEBUG, "EAP-EKE: Forced mac %u",
134 static void eap_eke_deinit(struct eap_sm *sm, void *priv)
136 struct eap_eke_data *data = priv;
137 eap_eke_session_clean(&data->sess);
138 os_free(data->serverid);
139 os_free(data->peerid);
140 wpabuf_free(data->msgs);
141 bin_clear_free(data, sizeof(*data));
145 static struct wpabuf * eap_eke_build_msg(struct eap_eke_data *data, int id,
146 size_t length, u8 eke_exch)
153 msg = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_EKE, plen,
154 EAP_CODE_RESPONSE, id);
156 wpa_printf(MSG_ERROR, "EAP-EKE: Failed to allocate memory");
160 wpabuf_put_u8(msg, eke_exch);
166 static int eap_eke_supp_dhgroup(u8 dhgroup)
168 return dhgroup == EAP_EKE_DHGROUP_EKE_2 ||
169 dhgroup == EAP_EKE_DHGROUP_EKE_5 ||
170 dhgroup == EAP_EKE_DHGROUP_EKE_14 ||
171 dhgroup == EAP_EKE_DHGROUP_EKE_15 ||
172 dhgroup == EAP_EKE_DHGROUP_EKE_16;
176 static int eap_eke_supp_encr(u8 encr)
178 return encr == EAP_EKE_ENCR_AES128_CBC;
182 static int eap_eke_supp_prf(u8 prf)
184 return prf == EAP_EKE_PRF_HMAC_SHA1 ||
185 prf == EAP_EKE_PRF_HMAC_SHA2_256;
189 static int eap_eke_supp_mac(u8 mac)
191 return mac == EAP_EKE_MAC_HMAC_SHA1 ||
192 mac == EAP_EKE_MAC_HMAC_SHA2_256;
196 static struct wpabuf * eap_eke_build_fail(struct eap_eke_data *data,
197 struct eap_method_ret *ret,
198 const struct wpabuf *reqData,
203 wpa_printf(MSG_DEBUG, "EAP-EKE: Sending EAP-EKE-Failure/Response - code=0x%x",
206 resp = eap_eke_build_msg(data, eap_get_id(reqData), 4, EAP_EKE_FAILURE);
208 wpabuf_put_be32(resp, failure_code);
210 os_memset(data->dh_priv, 0, sizeof(data->dh_priv));
211 eap_eke_session_clean(&data->sess);
213 eap_eke_state(data, FAILURE);
214 ret->methodState = METHOD_DONE;
215 ret->decision = DECISION_FAIL;
216 ret->allowNotifications = FALSE;
222 static struct wpabuf * eap_eke_process_id(struct eap_eke_data *data,
223 struct eap_method_ret *ret,
224 const struct wpabuf *reqData,
229 unsigned num_prop, i;
231 const u8 *prop = NULL;
234 if (data->state != IDENTITY) {
235 return eap_eke_build_fail(data, ret, reqData,
236 EAP_EKE_FAIL_PROTO_ERROR);
239 wpa_printf(MSG_DEBUG, "EAP-EKE: Received EAP-EKE-ID/Request");
241 if (payload_len < 2 + 4) {
242 wpa_printf(MSG_DEBUG, "EAP-EKE: Too short ID/Request Data");
243 return eap_eke_build_fail(data, ret, reqData,
244 EAP_EKE_FAIL_PROTO_ERROR);
248 end = payload + payload_len;
251 pos++; /* Ignore Reserved field */
253 if (pos + num_prop * 4 > end) {
254 wpa_printf(MSG_DEBUG, "EAP-EKE: Too short ID/Request Data (num_prop=%u)",
256 return eap_eke_build_fail(data, ret, reqData,
257 EAP_EKE_FAIL_PROTO_ERROR);
260 for (i = 0; i < num_prop; i++) {
263 wpa_printf(MSG_DEBUG, "EAP-EKE: Proposal #%u: dh=%u encr=%u prf=%u mac=%u",
264 i, pos[0], pos[1], pos[2], pos[3]);
267 if ((data->dhgroup && data->dhgroup != *tmp) ||
268 !eap_eke_supp_dhgroup(*tmp))
271 if ((data->encr && data->encr != *tmp) ||
272 !eap_eke_supp_encr(*tmp))
275 if ((data->prf && data->prf != *tmp) ||
276 !eap_eke_supp_prf(*tmp))
279 if ((data->mac && data->mac != *tmp) ||
280 !eap_eke_supp_mac(*tmp))
284 if (eap_eke_session_init(&data->sess, prop[0], prop[1], prop[2],
290 wpa_printf(MSG_DEBUG, "EAP-EKE: Selected proposal");
295 wpa_printf(MSG_DEBUG, "EAP-EKE: No acceptable proposal found");
296 return eap_eke_build_fail(data, ret, reqData,
297 EAP_EKE_FAIL_NO_PROPOSAL_CHOSEN);
300 pos += (num_prop - i - 1) * 4;
303 wpa_printf(MSG_DEBUG, "EAP-EKE: Too short ID/Request Data to include IDType/Identity");
304 return eap_eke_build_fail(data, ret, reqData,
305 EAP_EKE_FAIL_PROTO_ERROR);
309 wpa_printf(MSG_DEBUG, "EAP-EKE: Server IDType %u", idtype);
310 wpa_hexdump_ascii(MSG_DEBUG, "EAP-EKE: Server Identity",
312 os_free(data->serverid);
313 data->serverid = os_malloc(end - pos);
314 if (data->serverid == NULL) {
315 return eap_eke_build_fail(data, ret, reqData,
316 EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
318 os_memcpy(data->serverid, pos, end - pos);
319 data->serverid_len = end - pos;
321 wpa_printf(MSG_DEBUG, "EAP-EKE: Sending EAP-EKE-ID/Response");
323 resp = eap_eke_build_msg(data, eap_get_id(reqData),
324 2 + 4 + 1 + data->peerid_len,
327 return eap_eke_build_fail(data, ret, reqData,
328 EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
331 wpabuf_put_u8(resp, 1); /* NumProposals */
332 wpabuf_put_u8(resp, 0); /* Reserved */
333 wpabuf_put_data(resp, prop, 4); /* Selected Proposal */
334 wpabuf_put_u8(resp, EAP_EKE_ID_NAI);
336 wpabuf_put_data(resp, data->peerid, data->peerid_len);
338 wpabuf_free(data->msgs);
339 data->msgs = wpabuf_alloc(wpabuf_len(reqData) + wpabuf_len(resp));
340 if (data->msgs == NULL) {
342 return eap_eke_build_fail(data, ret, reqData,
343 EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
345 wpabuf_put_buf(data->msgs, reqData);
346 wpabuf_put_buf(data->msgs, resp);
348 eap_eke_state(data, COMMIT);
354 static struct wpabuf * eap_eke_process_commit(struct eap_sm *sm,
355 struct eap_eke_data *data,
356 struct eap_method_ret *ret,
357 const struct wpabuf *reqData,
362 const u8 *pos, *end, *dhcomp;
365 u8 key[EAP_EKE_MAX_KEY_LEN];
366 u8 pub[EAP_EKE_MAX_DH_LEN];
370 if (data->state != COMMIT) {
371 wpa_printf(MSG_DEBUG, "EAP-EKE: EAP-EKE-Commit/Request received in unexpected state (%d)", data->state);
372 return eap_eke_build_fail(data, ret, reqData,
373 EAP_EKE_FAIL_PROTO_ERROR);
376 wpa_printf(MSG_DEBUG, "EAP-EKE: Received EAP-EKE-Commit/Request");
378 password = eap_get_config_password(sm, &password_len);
379 if (password == NULL) {
380 wpa_printf(MSG_INFO, "EAP-EKE: No password configured!");
381 return eap_eke_build_fail(data, ret, reqData,
382 EAP_EKE_FAIL_PASSWD_NOT_FOUND);
386 end = payload + payload_len;
388 if (pos + data->sess.dhcomp_len > end) {
389 wpa_printf(MSG_DEBUG, "EAP-EKE: Too short EAP-EKE-Commit");
390 return eap_eke_build_fail(data, ret, reqData,
391 EAP_EKE_FAIL_PROTO_ERROR);
394 wpa_hexdump(MSG_DEBUG, "EAP-EKE: DHComponent_S",
395 pos, data->sess.dhcomp_len);
397 pos += data->sess.dhcomp_len;
398 wpa_hexdump(MSG_DEBUG, "EAP-EKE: CBValue", pos, end - pos);
401 * temp = prf(0+, password)
402 * key = prf+(temp, ID_S | ID_P)
404 if (eap_eke_derive_key(&data->sess, password, password_len,
405 data->serverid, data->serverid_len,
406 data->peerid, data->peerid_len, key) < 0) {
407 wpa_printf(MSG_INFO, "EAP-EKE: Failed to derive key");
408 return eap_eke_build_fail(data, ret, reqData,
409 EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
413 * y_p = g ^ x_p (mod p)
414 * x_p = random number 2 .. p-1
416 if (eap_eke_dh_init(data->sess.dhgroup, data->dh_priv, pub) < 0) {
417 wpa_printf(MSG_INFO, "EAP-EKE: Failed to initialize DH");
418 os_memset(key, 0, sizeof(key));
419 return eap_eke_build_fail(data, ret, reqData,
420 EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
423 if (eap_eke_shared_secret(&data->sess, key, data->dh_priv, dhcomp) < 0)
425 wpa_printf(MSG_INFO, "EAP-EKE: Failed to derive shared secret");
426 os_memset(key, 0, sizeof(key));
427 return eap_eke_build_fail(data, ret, reqData,
428 EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
431 if (eap_eke_derive_ke_ki(&data->sess,
432 data->serverid, data->serverid_len,
433 data->peerid, data->peerid_len) < 0) {
434 wpa_printf(MSG_INFO, "EAP-EKE: Failed to derive Ke/Ki");
435 os_memset(key, 0, sizeof(key));
436 return eap_eke_build_fail(data, ret, reqData,
437 EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
440 wpa_printf(MSG_DEBUG, "EAP-EKE: Sending EAP-EKE-Commit/Response");
442 resp = eap_eke_build_msg(data, eap_get_id(reqData),
443 data->sess.dhcomp_len + data->sess.pnonce_len,
446 os_memset(key, 0, sizeof(key));
447 return eap_eke_build_fail(data, ret, reqData,
448 EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
451 /* DHComponent_P = Encr(key, y_p) */
452 rpos = wpabuf_put(resp, data->sess.dhcomp_len);
453 if (eap_eke_dhcomp(&data->sess, key, pub, rpos) < 0) {
454 wpa_printf(MSG_INFO, "EAP-EKE: Failed to build DHComponent_P");
455 os_memset(key, 0, sizeof(key));
456 return eap_eke_build_fail(data, ret, reqData,
457 EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
459 os_memset(key, 0, sizeof(key));
461 wpa_hexdump(MSG_DEBUG, "EAP-EKE: DHComponent_P",
462 rpos, data->sess.dhcomp_len);
464 if (random_get_bytes(data->nonce_p, data->sess.nonce_len)) {
466 return eap_eke_build_fail(data, ret, reqData,
467 EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
469 wpa_hexdump_key(MSG_DEBUG, "EAP-EKE: Nonce_P",
470 data->nonce_p, data->sess.nonce_len);
471 prot_len = wpabuf_tailroom(resp);
472 if (eap_eke_prot(&data->sess, data->nonce_p, data->sess.nonce_len,
473 wpabuf_put(resp, 0), &prot_len) < 0) {
475 return eap_eke_build_fail(data, ret, reqData,
476 EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
478 wpa_hexdump(MSG_DEBUG, "EAP-EKE: PNonce_P",
479 wpabuf_put(resp, 0), prot_len);
480 wpabuf_put(resp, prot_len);
484 if (wpabuf_resize(&data->msgs, wpabuf_len(reqData) + wpabuf_len(resp))
487 return eap_eke_build_fail(data, ret, reqData,
488 EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
490 wpabuf_put_buf(data->msgs, reqData);
491 wpabuf_put_buf(data->msgs, resp);
493 eap_eke_state(data, CONFIRM);
499 static struct wpabuf * eap_eke_process_confirm(struct eap_eke_data *data,
500 struct eap_method_ret *ret,
501 const struct wpabuf *reqData,
508 u8 nonces[2 * EAP_EKE_MAX_NONCE_LEN];
509 u8 auth_s[EAP_EKE_MAX_HASH_LEN];
513 if (data->state != CONFIRM) {
514 wpa_printf(MSG_DEBUG, "EAP-EKE: EAP-EKE-Confirm/Request received in unexpected state (%d)",
516 return eap_eke_build_fail(data, ret, reqData,
517 EAP_EKE_FAIL_PROTO_ERROR);
520 wpa_printf(MSG_DEBUG, "EAP-EKE: Received EAP-EKE-Confirm/Request");
523 end = payload + payload_len;
525 if (pos + data->sess.pnonce_ps_len + data->sess.prf_len > end) {
526 wpa_printf(MSG_DEBUG, "EAP-EKE: Too short EAP-EKE-Confirm");
527 return eap_eke_build_fail(data, ret, reqData,
528 EAP_EKE_FAIL_PROTO_ERROR);
531 decrypt_len = sizeof(nonces);
532 if (eap_eke_decrypt_prot(&data->sess, pos, data->sess.pnonce_ps_len,
533 nonces, &decrypt_len) < 0) {
534 wpa_printf(MSG_INFO, "EAP-EKE: Failed to decrypt PNonce_PS");
535 return eap_eke_build_fail(data, ret, reqData,
536 EAP_EKE_FAIL_AUTHENTICATION_FAIL);
538 if (decrypt_len != (size_t) 2 * data->sess.nonce_len) {
539 wpa_printf(MSG_INFO, "EAP-EKE: PNonce_PS protected data length does not match length of Nonce_P and Nonce_S");
540 return eap_eke_build_fail(data, ret, reqData,
541 EAP_EKE_FAIL_AUTHENTICATION_FAIL);
543 wpa_hexdump_key(MSG_DEBUG, "EAP-EKE: Received Nonce_P | Nonce_S",
544 nonces, 2 * data->sess.nonce_len);
545 if (os_memcmp(data->nonce_p, nonces, data->sess.nonce_len) != 0) {
546 wpa_printf(MSG_INFO, "EAP-EKE: Received Nonce_P does not match transmitted Nonce_P");
547 return eap_eke_build_fail(data, ret, reqData,
548 EAP_EKE_FAIL_AUTHENTICATION_FAIL);
551 os_memcpy(data->nonce_s, nonces + data->sess.nonce_len,
552 data->sess.nonce_len);
553 wpa_hexdump_key(MSG_DEBUG, "EAP-EKE: Nonce_S",
554 data->nonce_s, data->sess.nonce_len);
556 if (eap_eke_derive_ka(&data->sess, data->serverid, data->serverid_len,
557 data->peerid, data->peerid_len,
558 data->nonce_p, data->nonce_s) < 0) {
559 return eap_eke_build_fail(data, ret, reqData,
560 EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
563 if (eap_eke_auth(&data->sess, "EAP-EKE server", data->msgs, auth_s) < 0)
565 return eap_eke_build_fail(data, ret, reqData,
566 EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
568 wpa_hexdump(MSG_DEBUG, "EAP-EKE: Auth_S", auth_s, data->sess.prf_len);
569 if (os_memcmp_const(auth_s, pos + data->sess.pnonce_ps_len,
570 data->sess.prf_len) != 0) {
571 wpa_printf(MSG_INFO, "EAP-EKE: Auth_S does not match");
572 return eap_eke_build_fail(data, ret, reqData,
573 EAP_EKE_FAIL_AUTHENTICATION_FAIL);
576 wpa_printf(MSG_DEBUG, "EAP-EKE: Sending EAP-EKE-Confirm/Response");
578 resp = eap_eke_build_msg(data, eap_get_id(reqData),
579 data->sess.pnonce_len + data->sess.prf_len,
582 return eap_eke_build_fail(data, ret, reqData,
583 EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
586 prot_len = wpabuf_tailroom(resp);
587 if (eap_eke_prot(&data->sess, data->nonce_s, data->sess.nonce_len,
588 wpabuf_put(resp, 0), &prot_len) < 0) {
590 return eap_eke_build_fail(data, ret, reqData,
591 EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
593 wpabuf_put(resp, prot_len);
595 auth = wpabuf_put(resp, data->sess.prf_len);
596 if (eap_eke_auth(&data->sess, "EAP-EKE peer", data->msgs, auth) < 0) {
598 return eap_eke_build_fail(data, ret, reqData,
599 EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
601 wpa_hexdump(MSG_DEBUG, "EAP-EKE: Auth_P", auth, data->sess.prf_len);
603 if (eap_eke_derive_msk(&data->sess, data->serverid, data->serverid_len,
604 data->peerid, data->peerid_len,
605 data->nonce_s, data->nonce_p,
606 data->msk, data->emsk) < 0) {
607 wpa_printf(MSG_INFO, "EAP-EKE: Failed to derive MSK/EMSK");
609 return eap_eke_build_fail(data, ret, reqData,
610 EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
613 os_memset(data->dh_priv, 0, sizeof(data->dh_priv));
614 eap_eke_session_clean(&data->sess);
616 eap_eke_state(data, SUCCESS);
617 ret->methodState = METHOD_MAY_CONT;
618 ret->decision = DECISION_COND_SUCC;
619 ret->allowNotifications = FALSE;
625 static struct wpabuf * eap_eke_process_failure(struct eap_eke_data *data,
626 struct eap_method_ret *ret,
627 const struct wpabuf *reqData,
631 wpa_printf(MSG_DEBUG, "EAP-EKE: Received EAP-EKE-Failure/Request");
633 if (payload_len < 4) {
634 wpa_printf(MSG_DEBUG, "EAP-EKE: Too short EAP-EKE-Failure");
637 code = WPA_GET_BE32(payload);
638 wpa_printf(MSG_INFO, "EAP-EKE: Failure-Code 0x%x", code);
641 return eap_eke_build_fail(data, ret, reqData, EAP_EKE_FAIL_NO_ERROR);
645 static struct wpabuf * eap_eke_process(struct eap_sm *sm, void *priv,
646 struct eap_method_ret *ret,
647 const struct wpabuf *reqData)
649 struct eap_eke_data *data = priv;
655 pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_EKE, reqData, &len);
656 if (pos == NULL || len < 1) {
664 wpa_printf(MSG_DEBUG, "EAP-EKE: Received frame: exch %d", eke_exch);
665 wpa_hexdump(MSG_DEBUG, "EAP-EKE: Received Data", pos, end - pos);
668 ret->methodState = METHOD_MAY_CONT;
669 ret->decision = DECISION_FAIL;
670 ret->allowNotifications = TRUE;
674 resp = eap_eke_process_id(data, ret, reqData, pos, end - pos);
677 resp = eap_eke_process_commit(sm, data, ret, reqData,
680 case EAP_EKE_CONFIRM:
681 resp = eap_eke_process_confirm(data, ret, reqData,
684 case EAP_EKE_FAILURE:
685 resp = eap_eke_process_failure(data, ret, reqData,
689 wpa_printf(MSG_DEBUG, "EAP-EKE: Ignoring message with unknown EKE-Exch %d", eke_exch);
694 if (ret->methodState == METHOD_DONE)
695 ret->allowNotifications = FALSE;
701 static Boolean eap_eke_isKeyAvailable(struct eap_sm *sm, void *priv)
703 struct eap_eke_data *data = priv;
704 return data->state == SUCCESS;
708 static u8 * eap_eke_getKey(struct eap_sm *sm, void *priv, size_t *len)
710 struct eap_eke_data *data = priv;
713 if (data->state != SUCCESS)
716 key = os_malloc(EAP_MSK_LEN);
719 os_memcpy(key, data->msk, EAP_MSK_LEN);
726 static u8 * eap_eke_get_emsk(struct eap_sm *sm, void *priv, size_t *len)
728 struct eap_eke_data *data = priv;
731 if (data->state != SUCCESS)
734 key = os_malloc(EAP_EMSK_LEN);
737 os_memcpy(key, data->emsk, EAP_EMSK_LEN);
744 int eap_peer_eke_register(void)
746 struct eap_method *eap;
749 eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
750 EAP_VENDOR_IETF, EAP_TYPE_EKE, "EKE");
754 eap->init = eap_eke_init;
755 eap->deinit = eap_eke_deinit;
756 eap->process = eap_eke_process;
757 eap->isKeyAvailable = eap_eke_isKeyAvailable;
758 eap->getKey = eap_eke_getKey;
759 eap->get_emsk = eap_eke_get_emsk;
761 ret = eap_peer_method_register(eap);
763 eap_peer_method_free(eap);