2 * hostapd / EAP-EKE (RFC 6124) server
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_server/eap_i.h"
14 #include "eap_common/eap_eke_common.h"
19 IDENTITY, COMMIT, CONFIRM, FAILURE_REPORT, SUCCESS, FAILURE
22 u8 emsk[EAP_EMSK_LEN];
27 u8 dh_priv[EAP_EKE_MAX_DH_LEN];
28 u8 key[EAP_EKE_MAX_KEY_LEN];
29 struct eap_eke_session sess;
30 u8 nonce_p[EAP_EKE_MAX_NONCE_LEN];
31 u8 nonce_s[EAP_EKE_MAX_NONCE_LEN];
38 static const char * eap_eke_state_txt(int state)
48 return "FAILURE_REPORT";
59 static void eap_eke_state(struct eap_eke_data *data, int state)
61 wpa_printf(MSG_DEBUG, "EAP-EKE: %s -> %s",
62 eap_eke_state_txt(data->state),
63 eap_eke_state_txt(state));
68 static void eap_eke_fail(struct eap_eke_data *data, u32 code)
70 wpa_printf(MSG_DEBUG, "EAP-EKE: Failure - code 0x%x", code);
71 data->failure_code = code;
72 eap_eke_state(data, FAILURE_REPORT);
76 static void * eap_eke_init(struct eap_sm *sm)
78 struct eap_eke_data *data;
81 data = os_zalloc(sizeof(*data));
84 eap_eke_state(data, IDENTITY);
86 data->serverid_type = EAP_EKE_ID_OPAQUE;
87 for (i = 0; i < sm->server_id_len; i++) {
88 if (sm->server_id[i] == '.' &&
89 data->serverid_type == EAP_EKE_ID_OPAQUE)
90 data->serverid_type = EAP_EKE_ID_FQDN;
91 if (sm->server_id[i] == '@')
92 data->serverid_type = EAP_EKE_ID_NAI;
95 data->phase2 = sm->init_phase2;
101 static void eap_eke_reset(struct eap_sm *sm, void *priv)
103 struct eap_eke_data *data = priv;
104 eap_eke_session_clean(&data->sess);
105 os_free(data->peerid);
106 wpabuf_free(data->msgs);
107 bin_clear_free(data, sizeof(*data));
111 static struct wpabuf * eap_eke_build_msg(struct eap_eke_data *data,
112 u8 id, size_t length, u8 eke_exch)
119 msg = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_EKE, plen,
120 EAP_CODE_REQUEST, id);
122 wpa_printf(MSG_ERROR, "EAP-EKE: Failed to allocate memory");
126 wpabuf_put_u8(msg, eke_exch);
132 static int supported_proposal(const u8 *pos)
134 if (pos[0] == EAP_EKE_DHGROUP_EKE_16 &&
135 pos[1] == EAP_EKE_ENCR_AES128_CBC &&
136 pos[2] == EAP_EKE_PRF_HMAC_SHA2_256 &&
137 pos[3] == EAP_EKE_MAC_HMAC_SHA2_256)
140 if (pos[0] == EAP_EKE_DHGROUP_EKE_15 &&
141 pos[1] == EAP_EKE_ENCR_AES128_CBC &&
142 pos[2] == EAP_EKE_PRF_HMAC_SHA2_256 &&
143 pos[3] == EAP_EKE_MAC_HMAC_SHA2_256)
146 if (pos[0] == EAP_EKE_DHGROUP_EKE_14 &&
147 pos[1] == EAP_EKE_ENCR_AES128_CBC &&
148 pos[2] == EAP_EKE_PRF_HMAC_SHA2_256 &&
149 pos[3] == EAP_EKE_MAC_HMAC_SHA2_256)
152 if (pos[0] == EAP_EKE_DHGROUP_EKE_14 &&
153 pos[1] == EAP_EKE_ENCR_AES128_CBC &&
154 pos[2] == EAP_EKE_PRF_HMAC_SHA1 &&
155 pos[3] == EAP_EKE_MAC_HMAC_SHA1)
162 static struct wpabuf * eap_eke_build_failure(struct eap_eke_data *data, u8 id)
166 wpa_printf(MSG_DEBUG, "EAP-EKE: Request/Failure: Failure-Code=0x%x",
169 msg = eap_eke_build_msg(data, id, 4, EAP_EKE_FAILURE);
171 eap_eke_state(data, FAILURE);
174 wpabuf_put_be32(msg, data->failure_code);
180 static struct wpabuf * eap_eke_build_identity(struct eap_sm *sm,
181 struct eap_eke_data *data,
187 wpa_printf(MSG_DEBUG, "EAP-EKE: Request/Identity");
189 plen = 2 + 4 * 4 + 1 + sm->server_id_len;
190 msg = eap_eke_build_msg(data, id, plen, EAP_EKE_ID);
194 wpabuf_put_u8(msg, 4); /* NumProposals */
195 wpabuf_put_u8(msg, 0); /* Reserved */
197 /* Proposal - DH Group 16 with AES128-CBC and SHA256 */
198 wpabuf_put_u8(msg, EAP_EKE_DHGROUP_EKE_16); /* Group Description */
199 wpabuf_put_u8(msg, EAP_EKE_ENCR_AES128_CBC); /* Encryption */
200 wpabuf_put_u8(msg, EAP_EKE_PRF_HMAC_SHA2_256); /* PRF */
201 wpabuf_put_u8(msg, EAP_EKE_MAC_HMAC_SHA2_256); /* MAC */
203 /* Proposal - DH Group 15 with AES128-CBC and SHA256 */
204 wpabuf_put_u8(msg, EAP_EKE_DHGROUP_EKE_15); /* Group Description */
205 wpabuf_put_u8(msg, EAP_EKE_ENCR_AES128_CBC); /* Encryption */
206 wpabuf_put_u8(msg, EAP_EKE_PRF_HMAC_SHA2_256); /* PRF */
207 wpabuf_put_u8(msg, EAP_EKE_MAC_HMAC_SHA2_256); /* MAC */
209 /* Proposal - DH Group 14 with AES128-CBC and SHA256 */
210 wpabuf_put_u8(msg, EAP_EKE_DHGROUP_EKE_14); /* Group Description */
211 wpabuf_put_u8(msg, EAP_EKE_ENCR_AES128_CBC); /* Encryption */
212 wpabuf_put_u8(msg, EAP_EKE_PRF_HMAC_SHA2_256); /* PRF */
213 wpabuf_put_u8(msg, EAP_EKE_MAC_HMAC_SHA2_256); /* MAC */
216 * Proposal - DH Group 14 with AES128-CBC and SHA1
217 * (mandatory to implement algorithms)
219 wpabuf_put_u8(msg, EAP_EKE_DHGROUP_EKE_14); /* Group Description */
220 wpabuf_put_u8(msg, EAP_EKE_ENCR_AES128_CBC); /* Encryption */
221 wpabuf_put_u8(msg, EAP_EKE_PRF_HMAC_SHA1); /* PRF */
222 wpabuf_put_u8(msg, EAP_EKE_MAC_HMAC_SHA1); /* MAC */
224 /* Server IDType + Identity */
225 wpabuf_put_u8(msg, data->serverid_type);
226 wpabuf_put_data(msg, sm->server_id, sm->server_id_len);
228 wpabuf_free(data->msgs);
229 data->msgs = wpabuf_dup(msg);
230 if (data->msgs == NULL) {
239 static struct wpabuf * eap_eke_build_commit(struct eap_sm *sm,
240 struct eap_eke_data *data, u8 id)
243 u8 pub[EAP_EKE_MAX_DH_LEN];
245 wpa_printf(MSG_DEBUG, "EAP-EKE: Request/Commit");
247 if (sm->user == NULL || sm->user->password == NULL) {
248 wpa_printf(MSG_INFO, "EAP-EKE: Password with not configured");
249 eap_eke_fail(data, EAP_EKE_FAIL_PASSWD_NOT_FOUND);
250 return eap_eke_build_failure(data, id);
253 if (eap_eke_derive_key(&data->sess, sm->user->password,
254 sm->user->password_len,
255 sm->server_id, sm->server_id_len,
256 data->peerid, data->peerid_len, data->key) < 0) {
257 wpa_printf(MSG_INFO, "EAP-EKE: Failed to derive key");
258 eap_eke_fail(data, EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
259 return eap_eke_build_failure(data, id);
262 msg = eap_eke_build_msg(data, id, data->sess.dhcomp_len,
265 eap_eke_fail(data, EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
266 return eap_eke_build_failure(data, id);
270 * y_s = g ^ x_s (mod p)
271 * x_s = random number 2 .. p-1
272 * temp = prf(0+, password)
273 * key = prf+(temp, ID_S | ID_P)
274 * DHComponent_S = Encr(key, y_s)
277 if (eap_eke_dh_init(data->sess.dhgroup, data->dh_priv, pub) < 0) {
278 wpa_printf(MSG_INFO, "EAP-EKE: Failed to initialize DH");
279 eap_eke_fail(data, EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
280 return eap_eke_build_failure(data, id);
283 if (eap_eke_dhcomp(&data->sess, data->key, pub,
284 wpabuf_put(msg, data->sess.dhcomp_len))
286 wpa_printf(MSG_INFO, "EAP-EKE: Failed to build DHComponent_S");
288 eap_eke_fail(data, EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
289 return eap_eke_build_failure(data, id);
292 if (wpabuf_resize(&data->msgs, wpabuf_len(msg)) < 0) {
294 eap_eke_fail(data, EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
295 return eap_eke_build_failure(data, id);
297 wpabuf_put_buf(data->msgs, msg);
303 static struct wpabuf * eap_eke_build_confirm(struct eap_sm *sm,
304 struct eap_eke_data *data, u8 id)
307 size_t plen, prot_len;
308 u8 nonces[2 * EAP_EKE_MAX_NONCE_LEN];
311 wpa_printf(MSG_DEBUG, "EAP-EKE: Request/Confirm");
313 plen = data->sess.pnonce_ps_len + data->sess.prf_len;
314 msg = eap_eke_build_msg(data, id, plen, EAP_EKE_CONFIRM);
316 eap_eke_fail(data, EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
317 return eap_eke_build_failure(data, id);
320 if (random_get_bytes(data->nonce_s, data->sess.nonce_len)) {
322 eap_eke_fail(data, EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
323 return eap_eke_build_failure(data, id);
325 wpa_hexdump_key(MSG_DEBUG, "EAP-EKE: Nonce_S",
326 data->nonce_s, data->sess.nonce_len);
328 os_memcpy(nonces, data->nonce_p, data->sess.nonce_len);
329 os_memcpy(nonces + data->sess.nonce_len, data->nonce_s,
330 data->sess.nonce_len);
331 prot_len = wpabuf_tailroom(msg);
332 if (eap_eke_prot(&data->sess, nonces, 2 * data->sess.nonce_len,
333 wpabuf_put(msg, 0), &prot_len) < 0) {
335 eap_eke_fail(data, EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
336 return eap_eke_build_failure(data, id);
338 wpabuf_put(msg, prot_len);
340 if (eap_eke_derive_ka(&data->sess,
341 sm->server_id, sm->server_id_len,
342 data->peerid, data->peerid_len,
343 data->nonce_p, data->nonce_s) < 0) {
345 eap_eke_fail(data, EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
346 return eap_eke_build_failure(data, id);
349 auth = wpabuf_put(msg, data->sess.prf_len);
350 if (eap_eke_auth(&data->sess, "EAP-EKE server", data->msgs, auth) < 0) {
352 eap_eke_fail(data, EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
353 return eap_eke_build_failure(data, id);
355 wpa_hexdump(MSG_DEBUG, "EAP-EKE: Auth_S", auth, data->sess.prf_len);
361 static struct wpabuf * eap_eke_buildReq(struct eap_sm *sm, void *priv, u8 id)
363 struct eap_eke_data *data = priv;
365 switch (data->state) {
367 return eap_eke_build_identity(sm, data, id);
369 return eap_eke_build_commit(sm, data, id);
371 return eap_eke_build_confirm(sm, data, id);
373 return eap_eke_build_failure(data, id);
375 wpa_printf(MSG_DEBUG, "EAP-EKE: Unknown state %d in buildReq",
383 static Boolean eap_eke_check(struct eap_sm *sm, void *priv,
384 struct wpabuf *respData)
386 struct eap_eke_data *data = priv;
391 pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_EKE, respData, &len);
392 if (pos == NULL || len < 1) {
393 wpa_printf(MSG_INFO, "EAP-EKE: Invalid frame");
398 wpa_printf(MSG_DEBUG, "EAP-EKE: Received frame: EKE-Exch=%d", eke_exch);
400 if (data->state == IDENTITY && eke_exch == EAP_EKE_ID)
403 if (data->state == COMMIT && eke_exch == EAP_EKE_COMMIT)
406 if (data->state == CONFIRM && eke_exch == EAP_EKE_CONFIRM)
409 if (eke_exch == EAP_EKE_FAILURE)
412 wpa_printf(MSG_INFO, "EAP-EKE: Unexpected EKE-Exch=%d in state=%d",
413 eke_exch, data->state);
419 static void eap_eke_process_identity(struct eap_sm *sm,
420 struct eap_eke_data *data,
421 const struct wpabuf *respData,
422 const u8 *payload, size_t payloadlen)
427 wpa_printf(MSG_DEBUG, "EAP-EKE: Received Response/Identity");
429 if (data->state != IDENTITY) {
430 eap_eke_fail(data, EAP_EKE_FAIL_PROTO_ERROR);
435 end = payload + payloadlen;
437 if (pos + 2 + 4 + 1 > end) {
438 wpa_printf(MSG_INFO, "EAP-EKE: Too short EAP-EKE-ID payload");
439 eap_eke_fail(data, EAP_EKE_FAIL_PROTO_ERROR);
444 wpa_printf(MSG_INFO, "EAP-EKE: Unexpected NumProposals %d (expected 1)",
446 eap_eke_fail(data, EAP_EKE_FAIL_PROTO_ERROR);
452 if (!supported_proposal(pos)) {
453 wpa_printf(MSG_INFO, "EAP-EKE: Unexpected Proposal (%u:%u:%u:%u)",
454 pos[0], pos[1], pos[2], pos[3]);
455 eap_eke_fail(data, EAP_EKE_FAIL_PROTO_ERROR);
459 wpa_printf(MSG_DEBUG, "EAP-EKE: Selected Proposal (%u:%u:%u:%u)",
460 pos[0], pos[1], pos[2], pos[3]);
461 if (eap_eke_session_init(&data->sess, pos[0], pos[1], pos[2], pos[3]) <
463 eap_eke_fail(data, EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
468 data->peerid_type = *pos++;
469 os_free(data->peerid);
470 data->peerid = os_malloc(end - pos);
471 if (data->peerid == NULL) {
472 wpa_printf(MSG_INFO, "EAP-EKE: Failed to allocate memory for peerid");
473 eap_eke_fail(data, EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
476 os_memcpy(data->peerid, pos, end - pos);
477 data->peerid_len = end - pos;
478 wpa_printf(MSG_DEBUG, "EAP-EKE: Peer IDType %u", data->peerid_type);
479 wpa_hexdump_ascii(MSG_DEBUG, "EAP-EKE: Peer Identity",
480 data->peerid, data->peerid_len);
482 if (eap_user_get(sm, data->peerid, data->peerid_len, data->phase2)) {
483 wpa_printf(MSG_INFO, "EAP-EKE: Peer Identity not found from user database");
484 eap_eke_fail(data, EAP_EKE_FAIL_PASSWD_NOT_FOUND);
488 for (i = 0; i < EAP_MAX_METHODS; i++) {
489 if (sm->user->methods[i].vendor == EAP_VENDOR_IETF &&
490 sm->user->methods[i].method == EAP_TYPE_EKE)
493 if (i == EAP_MAX_METHODS) {
494 wpa_printf(MSG_INFO, "EAP-EKE: Matching user entry does not allow EAP-EKE");
495 eap_eke_fail(data, EAP_EKE_FAIL_PASSWD_NOT_FOUND);
499 if (sm->user->password == NULL || sm->user->password_len == 0) {
500 wpa_printf(MSG_INFO, "EAP-EKE: No password configured for peer");
501 eap_eke_fail(data, EAP_EKE_FAIL_PASSWD_NOT_FOUND);
505 if (wpabuf_resize(&data->msgs, wpabuf_len(respData)) < 0) {
506 eap_eke_fail(data, EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
509 wpabuf_put_buf(data->msgs, respData);
511 eap_eke_state(data, COMMIT);
515 static void eap_eke_process_commit(struct eap_sm *sm,
516 struct eap_eke_data *data,
517 const struct wpabuf *respData,
518 const u8 *payload, size_t payloadlen)
520 const u8 *pos, *end, *dhcomp, *pnonce;
523 wpa_printf(MSG_DEBUG, "EAP-EKE: Received Response/Commit");
525 if (data->state != COMMIT) {
526 eap_eke_fail(data, EAP_EKE_FAIL_PROTO_ERROR);
531 end = payload + payloadlen;
533 if (pos + data->sess.dhcomp_len + data->sess.pnonce_len > end) {
534 wpa_printf(MSG_DEBUG, "EAP-EKE: Too short EAP-EKE-Commit");
535 eap_eke_fail(data, EAP_EKE_FAIL_PROTO_ERROR);
539 wpa_hexdump(MSG_DEBUG, "EAP-EKE: DHComponent_P",
540 pos, data->sess.dhcomp_len);
542 pos += data->sess.dhcomp_len;
543 wpa_hexdump(MSG_DEBUG, "EAP-EKE: PNonce_P", pos, data->sess.pnonce_len);
545 pos += data->sess.pnonce_len;
546 wpa_hexdump(MSG_DEBUG, "EAP-EKE: CBValue", pos, end - pos);
548 if (eap_eke_shared_secret(&data->sess, data->key, data->dh_priv, dhcomp)
550 wpa_printf(MSG_INFO, "EAP-EKE: Failed to derive shared secret");
551 eap_eke_fail(data, EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
555 if (eap_eke_derive_ke_ki(&data->sess,
556 sm->server_id, sm->server_id_len,
557 data->peerid, data->peerid_len) < 0) {
558 wpa_printf(MSG_INFO, "EAP-EKE: Failed to derive Ke/Ki");
559 eap_eke_fail(data, EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
563 decrypt_len = sizeof(data->nonce_p);
564 if (eap_eke_decrypt_prot(&data->sess, pnonce, data->sess.pnonce_len,
565 data->nonce_p, &decrypt_len) < 0) {
566 wpa_printf(MSG_INFO, "EAP-EKE: Failed to decrypt PNonce_P");
567 eap_eke_fail(data, EAP_EKE_FAIL_AUTHENTICATION_FAIL);
570 if (decrypt_len < (size_t) data->sess.nonce_len) {
571 wpa_printf(MSG_INFO, "EAP-EKE: PNonce_P protected data too short to include Nonce_P");
572 eap_eke_fail(data, EAP_EKE_FAIL_AUTHENTICATION_FAIL);
575 wpa_hexdump_key(MSG_DEBUG, "EAP-EKE: Nonce_P",
576 data->nonce_p, data->sess.nonce_len);
578 if (wpabuf_resize(&data->msgs, wpabuf_len(respData)) < 0) {
579 eap_eke_fail(data, EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
582 wpabuf_put_buf(data->msgs, respData);
584 eap_eke_state(data, CONFIRM);
588 static void eap_eke_process_confirm(struct eap_sm *sm,
589 struct eap_eke_data *data,
590 const struct wpabuf *respData,
591 const u8 *payload, size_t payloadlen)
594 u8 nonce[EAP_EKE_MAX_NONCE_LEN];
595 u8 auth_p[EAP_EKE_MAX_HASH_LEN];
597 wpa_printf(MSG_DEBUG, "EAP-EKE: Received Response/Confirm");
599 if (data->state != CONFIRM) {
600 eap_eke_fail(data, EAP_EKE_FAIL_PROTO_ERROR);
604 wpa_printf(MSG_DEBUG, "EAP-EKE: Received Response/Confirm");
606 if (payloadlen < (size_t) data->sess.pnonce_len + data->sess.prf_len) {
607 wpa_printf(MSG_DEBUG, "EAP-EKE: Too short EAP-EKE-Confirm");
608 eap_eke_fail(data, EAP_EKE_FAIL_PROTO_ERROR);
612 decrypt_len = sizeof(nonce);
613 if (eap_eke_decrypt_prot(&data->sess, payload, data->sess.pnonce_len,
614 nonce, &decrypt_len) < 0) {
615 wpa_printf(MSG_INFO, "EAP-EKE: Failed to decrypt PNonce_S");
616 eap_eke_fail(data, EAP_EKE_FAIL_AUTHENTICATION_FAIL);
619 if (decrypt_len < (size_t) data->sess.nonce_len) {
620 wpa_printf(MSG_INFO, "EAP-EKE: PNonce_S protected data too short to include Nonce_S");
621 eap_eke_fail(data, EAP_EKE_FAIL_AUTHENTICATION_FAIL);
624 wpa_hexdump_key(MSG_DEBUG, "EAP-EKE: Received Nonce_S",
625 nonce, data->sess.nonce_len);
626 if (os_memcmp(nonce, data->nonce_s, data->sess.nonce_len) != 0) {
627 wpa_printf(MSG_INFO, "EAP-EKE: Received Nonce_S does not match previously sent Nonce_S");
628 eap_eke_fail(data, EAP_EKE_FAIL_AUTHENTICATION_FAIL);
632 if (eap_eke_auth(&data->sess, "EAP-EKE peer", data->msgs, auth_p) < 0) {
633 wpa_printf(MSG_INFO, "EAP-EKE: Could not derive Auth_P");
634 eap_eke_fail(data, EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
637 wpa_hexdump(MSG_DEBUG, "EAP-EKE: Auth_P", auth_p, data->sess.prf_len);
638 if (os_memcmp_const(auth_p, payload + data->sess.pnonce_len,
639 data->sess.prf_len) != 0) {
640 wpa_printf(MSG_INFO, "EAP-EKE: Auth_P does not match");
641 eap_eke_fail(data, EAP_EKE_FAIL_AUTHENTICATION_FAIL);
645 if (eap_eke_derive_msk(&data->sess, sm->server_id, sm->server_id_len,
646 data->peerid, data->peerid_len,
647 data->nonce_s, data->nonce_p,
648 data->msk, data->emsk) < 0) {
649 wpa_printf(MSG_INFO, "EAP-EKE: Failed to derive MSK/EMSK");
650 eap_eke_fail(data, EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR);
654 os_memset(data->dh_priv, 0, sizeof(data->dh_priv));
655 os_memset(data->key, 0, sizeof(data->key));
656 eap_eke_session_clean(&data->sess);
658 eap_eke_state(data, SUCCESS);
662 static void eap_eke_process_failure(struct eap_sm *sm,
663 struct eap_eke_data *data,
664 const struct wpabuf *respData,
665 const u8 *payload, size_t payloadlen)
669 wpa_printf(MSG_DEBUG, "EAP-EKE: Received Response/Failure");
671 if (payloadlen < 4) {
672 wpa_printf(MSG_DEBUG, "EAP-EKE: Too short EAP-EKE-Failure");
673 eap_eke_state(data, FAILURE);
677 code = WPA_GET_BE32(payload);
678 wpa_printf(MSG_DEBUG, "EAP-EKE: Peer reported failure code 0x%x", code);
680 eap_eke_state(data, FAILURE);
684 static void eap_eke_process(struct eap_sm *sm, void *priv,
685 struct wpabuf *respData)
687 struct eap_eke_data *data = priv;
692 pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_EKE, respData, &len);
693 if (pos == NULL || len < 1)
700 wpa_hexdump(MSG_DEBUG, "EAP-EKE: Received payload", pos, end - pos);
704 eap_eke_process_identity(sm, data, respData, pos, end - pos);
707 eap_eke_process_commit(sm, data, respData, pos, end - pos);
709 case EAP_EKE_CONFIRM:
710 eap_eke_process_confirm(sm, data, respData, pos, end - pos);
712 case EAP_EKE_FAILURE:
713 eap_eke_process_failure(sm, data, respData, pos, end - pos);
719 static Boolean eap_eke_isDone(struct eap_sm *sm, void *priv)
721 struct eap_eke_data *data = priv;
722 return data->state == SUCCESS || data->state == FAILURE;
726 static u8 * eap_eke_getKey(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_MSK_LEN);
737 os_memcpy(key, data->msk, EAP_MSK_LEN);
744 static u8 * eap_eke_get_emsk(struct eap_sm *sm, void *priv, size_t *len)
746 struct eap_eke_data *data = priv;
749 if (data->state != SUCCESS)
752 key = os_malloc(EAP_EMSK_LEN);
755 os_memcpy(key, data->emsk, EAP_EMSK_LEN);
762 static Boolean eap_eke_isSuccess(struct eap_sm *sm, void *priv)
764 struct eap_eke_data *data = priv;
765 return data->state == SUCCESS;
769 static u8 * eap_eke_get_session_id(struct eap_sm *sm, void *priv, size_t *len)
771 struct eap_eke_data *data = priv;
775 if (data->state != SUCCESS)
778 sid_len = 1 + 2 * data->sess.nonce_len;
779 sid = os_malloc(sid_len);
782 sid[0] = EAP_TYPE_EKE;
783 os_memcpy(sid + 1, data->nonce_p, data->sess.nonce_len);
784 os_memcpy(sid + 1 + data->sess.nonce_len, data->nonce_s,
785 data->sess.nonce_len);
792 int eap_server_eke_register(void)
794 struct eap_method *eap;
797 eap = eap_server_method_alloc(EAP_SERVER_METHOD_INTERFACE_VERSION,
798 EAP_VENDOR_IETF, EAP_TYPE_EKE, "EKE");
802 eap->init = eap_eke_init;
803 eap->reset = eap_eke_reset;
804 eap->buildReq = eap_eke_buildReq;
805 eap->check = eap_eke_check;
806 eap->process = eap_eke_process;
807 eap->isDone = eap_eke_isDone;
808 eap->getKey = eap_eke_getKey;
809 eap->isSuccess = eap_eke_isSuccess;
810 eap->get_emsk = eap_eke_get_emsk;
811 eap->getSessionId = eap_eke_get_session_id;
813 ret = eap_server_method_register(eap);
815 eap_server_method_free(eap);