Line data Source code
1 : /*
2 : * hostapd / EAP-pwd (RFC 5931) server
3 : * Copyright (c) 2010, Dan Harkins <dharkins@lounge.org>
4 : *
5 : * This software may be distributed under the terms of the BSD license.
6 : * See README for more details.
7 : */
8 :
9 : #include "includes.h"
10 :
11 : #include "common.h"
12 : #include "crypto/sha256.h"
13 : #include "crypto/ms_funcs.h"
14 : #include "eap_server/eap_i.h"
15 : #include "eap_common/eap_pwd_common.h"
16 :
17 :
18 : struct eap_pwd_data {
19 : enum {
20 : PWD_ID_Req, PWD_Commit_Req, PWD_Confirm_Req, SUCCESS, FAILURE
21 : } state;
22 : u8 *id_peer;
23 : size_t id_peer_len;
24 : u8 *id_server;
25 : size_t id_server_len;
26 : u8 *password;
27 : size_t password_len;
28 : int password_hash;
29 : u32 token;
30 : u16 group_num;
31 : EAP_PWD_group *grp;
32 :
33 : struct wpabuf *inbuf;
34 : size_t in_frag_pos;
35 : struct wpabuf *outbuf;
36 : size_t out_frag_pos;
37 : size_t mtu;
38 :
39 : BIGNUM *k;
40 : BIGNUM *private_value;
41 : BIGNUM *peer_scalar;
42 : BIGNUM *my_scalar;
43 : EC_POINT *my_element;
44 : EC_POINT *peer_element;
45 :
46 : u8 my_confirm[SHA256_MAC_LEN];
47 :
48 : u8 msk[EAP_MSK_LEN];
49 : u8 emsk[EAP_EMSK_LEN];
50 : u8 session_id[1 + SHA256_MAC_LEN];
51 :
52 : BN_CTX *bnctx;
53 : };
54 :
55 :
56 82 : static const char * eap_pwd_state_txt(int state)
57 : {
58 82 : switch (state) {
59 : case PWD_ID_Req:
60 14 : return "PWD-ID-Req";
61 : case PWD_Commit_Req:
62 28 : return "PWD-Commit-Req";
63 : case PWD_Confirm_Req:
64 27 : return "PWD-Confirm-Req";
65 : case SUCCESS:
66 13 : return "SUCCESS";
67 : case FAILURE:
68 0 : return "FAILURE";
69 : default:
70 0 : return "PWD-Unk";
71 : }
72 : }
73 :
74 :
75 41 : static void eap_pwd_state(struct eap_pwd_data *data, int state)
76 : {
77 82 : wpa_printf(MSG_DEBUG, "EAP-pwd: %s -> %s",
78 41 : eap_pwd_state_txt(data->state), eap_pwd_state_txt(state));
79 41 : data->state = state;
80 41 : }
81 :
82 :
83 16 : static void * eap_pwd_init(struct eap_sm *sm)
84 : {
85 : struct eap_pwd_data *data;
86 :
87 32 : if (sm->user == NULL || sm->user->password == NULL ||
88 16 : sm->user->password_len == 0) {
89 0 : wpa_printf(MSG_INFO, "EAP-PWD (server): Password is not "
90 : "configured");
91 0 : return NULL;
92 : }
93 :
94 16 : data = os_zalloc(sizeof(*data));
95 16 : if (data == NULL)
96 0 : return NULL;
97 :
98 16 : data->group_num = sm->pwd_group;
99 16 : wpa_printf(MSG_DEBUG, "EAP-pwd: Selected group number %d",
100 16 : data->group_num);
101 16 : data->state = PWD_ID_Req;
102 :
103 16 : data->id_server = (u8 *) os_strdup("server");
104 16 : if (data->id_server)
105 16 : data->id_server_len = os_strlen((char *) data->id_server);
106 :
107 16 : data->password = os_malloc(sm->user->password_len);
108 16 : if (data->password == NULL) {
109 0 : wpa_printf(MSG_INFO, "EAP-PWD: Memory allocation password "
110 : "fail");
111 0 : bin_clear_free(data->id_server, data->id_server_len);
112 0 : os_free(data);
113 0 : return NULL;
114 : }
115 16 : data->password_len = sm->user->password_len;
116 16 : os_memcpy(data->password, sm->user->password, data->password_len);
117 16 : data->password_hash = sm->user->password_hash;
118 :
119 16 : data->bnctx = BN_CTX_new();
120 16 : if (data->bnctx == NULL) {
121 0 : wpa_printf(MSG_INFO, "EAP-PWD: bn context allocation fail");
122 0 : bin_clear_free(data->password, data->password_len);
123 0 : bin_clear_free(data->id_server, data->id_server_len);
124 0 : os_free(data);
125 0 : return NULL;
126 : }
127 :
128 16 : data->in_frag_pos = data->out_frag_pos = 0;
129 16 : data->inbuf = data->outbuf = NULL;
130 : /* use default MTU from RFC 5931 if not configured otherwise */
131 16 : data->mtu = sm->fragment_size > 0 ? sm->fragment_size : 1020;
132 :
133 16 : return data;
134 : }
135 :
136 :
137 16 : static void eap_pwd_reset(struct eap_sm *sm, void *priv)
138 : {
139 16 : struct eap_pwd_data *data = priv;
140 :
141 16 : BN_clear_free(data->private_value);
142 16 : BN_clear_free(data->peer_scalar);
143 16 : BN_clear_free(data->my_scalar);
144 16 : BN_clear_free(data->k);
145 16 : BN_CTX_free(data->bnctx);
146 16 : EC_POINT_clear_free(data->my_element);
147 16 : EC_POINT_clear_free(data->peer_element);
148 16 : bin_clear_free(data->id_peer, data->id_peer_len);
149 16 : bin_clear_free(data->id_server, data->id_server_len);
150 16 : bin_clear_free(data->password, data->password_len);
151 16 : if (data->grp) {
152 14 : EC_GROUP_free(data->grp->group);
153 14 : EC_POINT_clear_free(data->grp->pwe);
154 14 : BN_clear_free(data->grp->order);
155 14 : BN_clear_free(data->grp->prime);
156 14 : os_free(data->grp);
157 : }
158 16 : wpabuf_free(data->inbuf);
159 16 : wpabuf_free(data->outbuf);
160 16 : bin_clear_free(data, sizeof(*data));
161 16 : }
162 :
163 :
164 16 : static void eap_pwd_build_id_req(struct eap_sm *sm, struct eap_pwd_data *data,
165 : u8 id)
166 : {
167 16 : wpa_printf(MSG_DEBUG, "EAP-pwd: ID/Request");
168 : /*
169 : * if we're fragmenting then we already have an id request, just return
170 : */
171 16 : if (data->out_frag_pos)
172 0 : return;
173 :
174 16 : data->outbuf = wpabuf_alloc(sizeof(struct eap_pwd_id) +
175 16 : data->id_server_len);
176 16 : if (data->outbuf == NULL) {
177 0 : eap_pwd_state(data, FAILURE);
178 0 : return;
179 : }
180 :
181 : /* an lfsr is good enough to generate unpredictable tokens */
182 16 : data->token = os_random();
183 16 : wpabuf_put_be16(data->outbuf, data->group_num);
184 16 : wpabuf_put_u8(data->outbuf, EAP_PWD_DEFAULT_RAND_FUNC);
185 16 : wpabuf_put_u8(data->outbuf, EAP_PWD_DEFAULT_PRF);
186 16 : wpabuf_put_data(data->outbuf, &data->token, sizeof(data->token));
187 16 : wpabuf_put_u8(data->outbuf, data->password_hash ? EAP_PWD_PREP_MS :
188 : EAP_PWD_PREP_NONE);
189 16 : wpabuf_put_data(data->outbuf, data->id_server, data->id_server_len);
190 : }
191 :
192 :
193 16 : static void eap_pwd_build_commit_req(struct eap_sm *sm,
194 : struct eap_pwd_data *data, u8 id)
195 : {
196 16 : BIGNUM *mask = NULL, *x = NULL, *y = NULL;
197 16 : u8 *scalar = NULL, *element = NULL;
198 : u16 offset;
199 :
200 16 : wpa_printf(MSG_DEBUG, "EAP-pwd: Commit/Request");
201 : /*
202 : * if we're fragmenting then we already have an commit request, just
203 : * return
204 : */
205 16 : if (data->out_frag_pos)
206 18 : return;
207 :
208 28 : if (((data->private_value = BN_new()) == NULL) ||
209 28 : ((data->my_element = EC_POINT_new(data->grp->group)) == NULL) ||
210 28 : ((data->my_scalar = BN_new()) == NULL) ||
211 : ((mask = BN_new()) == NULL)) {
212 0 : wpa_printf(MSG_INFO, "EAP-PWD (server): scalar allocation "
213 : "fail");
214 0 : goto fin;
215 : }
216 :
217 28 : if (BN_rand_range(data->private_value, data->grp->order) != 1 ||
218 28 : BN_rand_range(mask, data->grp->order) != 1 ||
219 28 : BN_add(data->my_scalar, data->private_value, mask) != 1 ||
220 14 : BN_mod(data->my_scalar, data->my_scalar, data->grp->order,
221 : data->bnctx) != 1) {
222 0 : wpa_printf(MSG_INFO,
223 : "EAP-pwd (server): unable to get randomness");
224 0 : goto fin;
225 : }
226 :
227 28 : if (!EC_POINT_mul(data->grp->group, data->my_element, NULL,
228 14 : data->grp->pwe, mask, data->bnctx)) {
229 0 : wpa_printf(MSG_INFO, "EAP-PWD (server): element allocation "
230 : "fail");
231 0 : eap_pwd_state(data, FAILURE);
232 0 : goto fin;
233 : }
234 :
235 14 : if (!EC_POINT_invert(data->grp->group, data->my_element, data->bnctx))
236 : {
237 0 : wpa_printf(MSG_INFO, "EAP-PWD (server): element inversion "
238 : "fail");
239 0 : goto fin;
240 : }
241 14 : BN_clear_free(mask);
242 :
243 14 : if (((x = BN_new()) == NULL) ||
244 : ((y = BN_new()) == NULL)) {
245 0 : wpa_printf(MSG_INFO, "EAP-PWD (server): point allocation "
246 : "fail");
247 0 : goto fin;
248 : }
249 28 : if (!EC_POINT_get_affine_coordinates_GFp(data->grp->group,
250 14 : data->my_element, x, y,
251 : data->bnctx)) {
252 0 : wpa_printf(MSG_INFO, "EAP-PWD (server): point assignment "
253 : "fail");
254 0 : goto fin;
255 : }
256 :
257 28 : if (((scalar = os_malloc(BN_num_bytes(data->grp->order))) == NULL) ||
258 14 : ((element = os_malloc(BN_num_bytes(data->grp->prime) * 2)) ==
259 : NULL)) {
260 0 : wpa_printf(MSG_INFO, "EAP-PWD (server): data allocation fail");
261 0 : goto fin;
262 : }
263 :
264 : /*
265 : * bignums occupy as little memory as possible so one that is
266 : * sufficiently smaller than the prime or order might need pre-pending
267 : * with zeros.
268 : */
269 14 : os_memset(scalar, 0, BN_num_bytes(data->grp->order));
270 14 : os_memset(element, 0, BN_num_bytes(data->grp->prime) * 2);
271 28 : offset = BN_num_bytes(data->grp->order) -
272 14 : BN_num_bytes(data->my_scalar);
273 14 : BN_bn2bin(data->my_scalar, scalar + offset);
274 :
275 14 : offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(x);
276 14 : BN_bn2bin(x, element + offset);
277 14 : offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(y);
278 14 : BN_bn2bin(y, element + BN_num_bytes(data->grp->prime) + offset);
279 :
280 28 : data->outbuf = wpabuf_alloc(2 * BN_num_bytes(data->grp->prime) +
281 14 : BN_num_bytes(data->grp->order));
282 14 : if (data->outbuf == NULL)
283 0 : goto fin;
284 :
285 : /* We send the element as (x,y) followed by the scalar */
286 14 : wpabuf_put_data(data->outbuf, element,
287 14 : 2 * BN_num_bytes(data->grp->prime));
288 14 : wpabuf_put_data(data->outbuf, scalar, BN_num_bytes(data->grp->order));
289 :
290 : fin:
291 14 : os_free(scalar);
292 14 : os_free(element);
293 14 : BN_clear_free(x);
294 14 : BN_clear_free(y);
295 14 : if (data->outbuf == NULL)
296 0 : eap_pwd_state(data, FAILURE);
297 : }
298 :
299 :
300 14 : static void eap_pwd_build_confirm_req(struct eap_sm *sm,
301 : struct eap_pwd_data *data, u8 id)
302 : {
303 14 : BIGNUM *x = NULL, *y = NULL;
304 : struct crypto_hash *hash;
305 14 : u8 conf[SHA256_MAC_LEN], *cruft = NULL, *ptr;
306 : u16 grp;
307 : int offset;
308 :
309 14 : wpa_printf(MSG_DEBUG, "EAP-pwd: Confirm/Request");
310 : /*
311 : * if we're fragmenting then we already have an confirm request, just
312 : * return
313 : */
314 14 : if (data->out_frag_pos)
315 14 : return;
316 :
317 : /* Each component of the cruft will be at most as big as the prime */
318 14 : if (((cruft = os_malloc(BN_num_bytes(data->grp->prime))) == NULL) ||
319 14 : ((x = BN_new()) == NULL) || ((y = BN_new()) == NULL)) {
320 0 : wpa_printf(MSG_INFO, "EAP-PWD (server): debug allocation "
321 : "fail");
322 0 : goto fin;
323 : }
324 :
325 : /*
326 : * commit is H(k | server_element | server_scalar | peer_element |
327 : * peer_scalar | ciphersuite)
328 : */
329 14 : hash = eap_pwd_h_init();
330 14 : if (hash == NULL)
331 0 : goto fin;
332 :
333 : /*
334 : * Zero the memory each time because this is mod prime math and some
335 : * value may start with a few zeros and the previous one did not.
336 : *
337 : * First is k
338 : */
339 14 : os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
340 14 : offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(data->k);
341 14 : BN_bn2bin(data->k, cruft + offset);
342 14 : eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
343 :
344 : /* server element: x, y */
345 28 : if (!EC_POINT_get_affine_coordinates_GFp(data->grp->group,
346 14 : data->my_element, x, y,
347 : data->bnctx)) {
348 0 : wpa_printf(MSG_INFO, "EAP-PWD (server): confirm point "
349 : "assignment fail");
350 0 : goto fin;
351 : }
352 :
353 14 : os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
354 14 : offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(x);
355 14 : BN_bn2bin(x, cruft + offset);
356 14 : eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
357 14 : os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
358 14 : offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(y);
359 14 : BN_bn2bin(y, cruft + offset);
360 14 : eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
361 :
362 : /* server scalar */
363 14 : os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
364 28 : offset = BN_num_bytes(data->grp->order) -
365 14 : BN_num_bytes(data->my_scalar);
366 14 : BN_bn2bin(data->my_scalar, cruft + offset);
367 14 : eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->order));
368 :
369 : /* peer element: x, y */
370 28 : if (!EC_POINT_get_affine_coordinates_GFp(data->grp->group,
371 14 : data->peer_element, x, y,
372 : data->bnctx)) {
373 0 : wpa_printf(MSG_INFO, "EAP-PWD (server): confirm point "
374 : "assignment fail");
375 0 : goto fin;
376 : }
377 :
378 14 : os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
379 14 : offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(x);
380 14 : BN_bn2bin(x, cruft + offset);
381 14 : eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
382 14 : os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
383 14 : offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(y);
384 14 : BN_bn2bin(y, cruft + offset);
385 14 : eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
386 :
387 : /* peer scalar */
388 14 : os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
389 28 : offset = BN_num_bytes(data->grp->order) -
390 14 : BN_num_bytes(data->peer_scalar);
391 14 : BN_bn2bin(data->peer_scalar, cruft + offset);
392 14 : eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->order));
393 :
394 : /* ciphersuite */
395 14 : grp = htons(data->group_num);
396 14 : os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
397 14 : ptr = cruft;
398 14 : os_memcpy(ptr, &grp, sizeof(u16));
399 14 : ptr += sizeof(u16);
400 14 : *ptr = EAP_PWD_DEFAULT_RAND_FUNC;
401 14 : ptr += sizeof(u8);
402 14 : *ptr = EAP_PWD_DEFAULT_PRF;
403 14 : ptr += sizeof(u8);
404 14 : eap_pwd_h_update(hash, cruft, ptr - cruft);
405 :
406 : /* all done with the random function */
407 14 : eap_pwd_h_final(hash, conf);
408 14 : os_memcpy(data->my_confirm, conf, SHA256_MAC_LEN);
409 :
410 14 : data->outbuf = wpabuf_alloc(SHA256_MAC_LEN);
411 14 : if (data->outbuf == NULL)
412 0 : goto fin;
413 :
414 14 : wpabuf_put_data(data->outbuf, conf, SHA256_MAC_LEN);
415 :
416 : fin:
417 14 : bin_clear_free(cruft, BN_num_bytes(data->grp->prime));
418 14 : BN_clear_free(x);
419 14 : BN_clear_free(y);
420 14 : if (data->outbuf == NULL)
421 0 : eap_pwd_state(data, FAILURE);
422 : }
423 :
424 :
425 : static struct wpabuf *
426 56 : eap_pwd_build_req(struct eap_sm *sm, void *priv, u8 id)
427 : {
428 56 : struct eap_pwd_data *data = priv;
429 : struct wpabuf *req;
430 : u8 lm_exch;
431 : const u8 *buf;
432 56 : u16 totlen = 0;
433 : size_t len;
434 :
435 : /*
436 : * if we're buffering response fragments then just ACK
437 : */
438 56 : if (data->in_frag_pos) {
439 10 : wpa_printf(MSG_DEBUG, "EAP-pwd: ACKing a fragment!!");
440 10 : req = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_PWD,
441 : EAP_PWD_HDR_SIZE, EAP_CODE_REQUEST, id);
442 10 : if (req == NULL) {
443 0 : eap_pwd_state(data, FAILURE);
444 0 : return NULL;
445 : }
446 10 : switch (data->state) {
447 : case PWD_ID_Req:
448 5 : wpabuf_put_u8(req, EAP_PWD_OPCODE_ID_EXCH);
449 5 : break;
450 : case PWD_Commit_Req:
451 4 : wpabuf_put_u8(req, EAP_PWD_OPCODE_COMMIT_EXCH);
452 4 : break;
453 : case PWD_Confirm_Req:
454 1 : wpabuf_put_u8(req, EAP_PWD_OPCODE_CONFIRM_EXCH);
455 1 : break;
456 : default:
457 0 : eap_pwd_state(data, FAILURE); /* just to be sure */
458 0 : wpabuf_free(req);
459 0 : return NULL;
460 : }
461 10 : return req;
462 : }
463 :
464 : /*
465 : * build the data portion of a request
466 : */
467 46 : switch (data->state) {
468 : case PWD_ID_Req:
469 16 : eap_pwd_build_id_req(sm, data, id);
470 16 : lm_exch = EAP_PWD_OPCODE_ID_EXCH;
471 16 : break;
472 : case PWD_Commit_Req:
473 16 : eap_pwd_build_commit_req(sm, data, id);
474 16 : lm_exch = EAP_PWD_OPCODE_COMMIT_EXCH;
475 16 : break;
476 : case PWD_Confirm_Req:
477 14 : eap_pwd_build_confirm_req(sm, data, id);
478 14 : lm_exch = EAP_PWD_OPCODE_CONFIRM_EXCH;
479 14 : break;
480 : default:
481 0 : wpa_printf(MSG_INFO, "EAP-pwd: Unknown state %d in build_req",
482 0 : data->state);
483 0 : eap_pwd_state(data, FAILURE);
484 0 : lm_exch = 0; /* hush now, sweet compiler */
485 0 : break;
486 : }
487 :
488 46 : if (data->state == FAILURE)
489 0 : return NULL;
490 :
491 : /*
492 : * determine whether that data needs to be fragmented
493 : */
494 46 : len = wpabuf_len(data->outbuf) - data->out_frag_pos;
495 46 : if ((len + EAP_PWD_HDR_SIZE) > data->mtu) {
496 2 : len = data->mtu - EAP_PWD_HDR_SIZE;
497 2 : EAP_PWD_SET_MORE_BIT(lm_exch);
498 : /*
499 : * if this is the first fragment, need to set the M bit
500 : * and add the total length to the eap_pwd_hdr
501 : */
502 2 : if (data->out_frag_pos == 0) {
503 1 : EAP_PWD_SET_LENGTH_BIT(lm_exch);
504 1 : totlen = wpabuf_len(data->outbuf) +
505 : EAP_PWD_HDR_SIZE + sizeof(u16);
506 1 : len -= sizeof(u16);
507 1 : wpa_printf(MSG_DEBUG, "EAP-pwd: Fragmenting output, "
508 : "total length = %d", totlen);
509 : }
510 2 : wpa_printf(MSG_DEBUG, "EAP-pwd: Send a %d byte fragment",
511 : (int) len);
512 : }
513 :
514 : /*
515 : * alloc an eap request and populate it with the data
516 : */
517 92 : req = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_PWD,
518 46 : EAP_PWD_HDR_SIZE + len +
519 46 : (totlen ? sizeof(u16) : 0),
520 : EAP_CODE_REQUEST, id);
521 46 : if (req == NULL) {
522 0 : eap_pwd_state(data, FAILURE);
523 0 : return NULL;
524 : }
525 :
526 46 : wpabuf_put_u8(req, lm_exch);
527 46 : if (EAP_PWD_GET_LENGTH_BIT(lm_exch))
528 1 : wpabuf_put_be16(req, totlen);
529 :
530 46 : buf = wpabuf_head_u8(data->outbuf);
531 46 : wpabuf_put_data(req, buf + data->out_frag_pos, len);
532 46 : data->out_frag_pos += len;
533 : /*
534 : * either not fragged or last fragment, either way free up the data
535 : */
536 46 : if (data->out_frag_pos >= wpabuf_len(data->outbuf)) {
537 44 : wpabuf_free(data->outbuf);
538 44 : data->outbuf = NULL;
539 44 : data->out_frag_pos = 0;
540 : }
541 :
542 46 : return req;
543 : }
544 :
545 :
546 53 : static Boolean eap_pwd_check(struct eap_sm *sm, void *priv,
547 : struct wpabuf *respData)
548 : {
549 53 : struct eap_pwd_data *data = priv;
550 : const u8 *pos;
551 : size_t len;
552 :
553 53 : pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_PWD, respData, &len);
554 53 : if (pos == NULL || len < 1) {
555 0 : wpa_printf(MSG_INFO, "EAP-pwd: Invalid frame");
556 0 : return TRUE;
557 : }
558 :
559 106 : wpa_printf(MSG_DEBUG, "EAP-pwd: Received frame: exch = %d, len = %d",
560 53 : EAP_PWD_GET_EXCHANGE(*pos), (int) len);
561 :
562 72 : if (data->state == PWD_ID_Req &&
563 19 : ((EAP_PWD_GET_EXCHANGE(*pos)) == EAP_PWD_OPCODE_ID_EXCH))
564 19 : return FALSE;
565 :
566 54 : if (data->state == PWD_Commit_Req &&
567 20 : ((EAP_PWD_GET_EXCHANGE(*pos)) == EAP_PWD_OPCODE_COMMIT_EXCH))
568 20 : return FALSE;
569 :
570 28 : if (data->state == PWD_Confirm_Req &&
571 14 : ((EAP_PWD_GET_EXCHANGE(*pos)) == EAP_PWD_OPCODE_CONFIRM_EXCH))
572 14 : return FALSE;
573 :
574 0 : wpa_printf(MSG_INFO, "EAP-pwd: Unexpected opcode=%d in state=%d",
575 0 : *pos, data->state);
576 :
577 0 : return TRUE;
578 : }
579 :
580 :
581 14 : static void eap_pwd_process_id_resp(struct eap_sm *sm,
582 : struct eap_pwd_data *data,
583 : const u8 *payload, size_t payload_len)
584 : {
585 : struct eap_pwd_id *id;
586 : const u8 *password;
587 : size_t password_len;
588 : u8 pwhashhash[16];
589 : int res;
590 :
591 14 : if (payload_len < sizeof(struct eap_pwd_id)) {
592 0 : wpa_printf(MSG_INFO, "EAP-pwd: Invalid ID response");
593 0 : return;
594 : }
595 :
596 14 : id = (struct eap_pwd_id *) payload;
597 28 : if ((data->group_num != be_to_host16(id->group_num)) ||
598 28 : (id->random_function != EAP_PWD_DEFAULT_RAND_FUNC) ||
599 28 : (os_memcmp(id->token, (u8 *)&data->token, sizeof(data->token))) ||
600 14 : (id->prf != EAP_PWD_DEFAULT_PRF)) {
601 0 : wpa_printf(MSG_INFO, "EAP-pwd: peer changed parameters");
602 0 : eap_pwd_state(data, FAILURE);
603 0 : return;
604 : }
605 14 : data->id_peer = os_malloc(payload_len - sizeof(struct eap_pwd_id));
606 14 : if (data->id_peer == NULL) {
607 0 : wpa_printf(MSG_INFO, "EAP-PWD: memory allocation id fail");
608 0 : return;
609 : }
610 14 : data->id_peer_len = payload_len - sizeof(struct eap_pwd_id);
611 14 : os_memcpy(data->id_peer, id->identity, data->id_peer_len);
612 28 : wpa_hexdump_ascii(MSG_DEBUG, "EAP-PWD (server): peer sent id of",
613 14 : data->id_peer, data->id_peer_len);
614 :
615 14 : data->grp = os_zalloc(sizeof(EAP_PWD_group));
616 14 : if (data->grp == NULL) {
617 0 : wpa_printf(MSG_INFO, "EAP-PWD: failed to allocate memory for "
618 : "group");
619 0 : return;
620 : }
621 :
622 14 : if (data->password_hash) {
623 2 : res = hash_nt_password_hash(data->password, pwhashhash);
624 2 : if (res)
625 0 : return;
626 2 : password = pwhashhash;
627 2 : password_len = sizeof(pwhashhash);
628 : } else {
629 12 : password = data->password;
630 12 : password_len = data->password_len;
631 : }
632 :
633 42 : res = compute_password_element(data->grp, data->group_num,
634 : password, password_len,
635 14 : data->id_server, data->id_server_len,
636 14 : data->id_peer, data->id_peer_len,
637 14 : (u8 *) &data->token);
638 14 : os_memset(pwhashhash, 0, sizeof(pwhashhash));
639 14 : if (res) {
640 0 : wpa_printf(MSG_INFO, "EAP-PWD (server): unable to compute "
641 : "PWE");
642 0 : return;
643 : }
644 14 : wpa_printf(MSG_DEBUG, "EAP-PWD (server): computed %d bit PWE...",
645 14 : BN_num_bits(data->grp->prime));
646 :
647 14 : eap_pwd_state(data, PWD_Commit_Req);
648 : }
649 :
650 :
651 : static void
652 14 : eap_pwd_process_commit_resp(struct eap_sm *sm, struct eap_pwd_data *data,
653 : const u8 *payload, size_t payload_len)
654 : {
655 : u8 *ptr;
656 14 : BIGNUM *x = NULL, *y = NULL, *cofactor = NULL;
657 14 : EC_POINT *K = NULL, *point = NULL;
658 14 : int res = 0;
659 : size_t prime_len, order_len;
660 :
661 14 : wpa_printf(MSG_DEBUG, "EAP-pwd: Received commit response");
662 :
663 14 : prime_len = BN_num_bytes(data->grp->prime);
664 14 : order_len = BN_num_bytes(data->grp->order);
665 :
666 14 : if (payload_len != 2 * prime_len + order_len) {
667 0 : wpa_printf(MSG_INFO,
668 : "EAP-pwd: Unexpected Commit payload length %u (expected %u)",
669 : (unsigned int) payload_len,
670 : (unsigned int) (2 * prime_len + order_len));
671 0 : goto fin;
672 : }
673 :
674 28 : if (((data->peer_scalar = BN_new()) == NULL) ||
675 28 : ((data->k = BN_new()) == NULL) ||
676 14 : ((cofactor = BN_new()) == NULL) ||
677 14 : ((x = BN_new()) == NULL) ||
678 14 : ((y = BN_new()) == NULL) ||
679 28 : ((point = EC_POINT_new(data->grp->group)) == NULL) ||
680 28 : ((K = EC_POINT_new(data->grp->group)) == NULL) ||
681 14 : ((data->peer_element = EC_POINT_new(data->grp->group)) == NULL)) {
682 0 : wpa_printf(MSG_INFO, "EAP-PWD (server): peer data allocation "
683 : "fail");
684 0 : goto fin;
685 : }
686 :
687 14 : if (!EC_GROUP_get_cofactor(data->grp->group, cofactor, NULL)) {
688 0 : wpa_printf(MSG_INFO, "EAP-PWD (server): unable to get "
689 : "cofactor for curve");
690 0 : goto fin;
691 : }
692 :
693 : /* element, x then y, followed by scalar */
694 14 : ptr = (u8 *) payload;
695 14 : BN_bin2bn(ptr, BN_num_bytes(data->grp->prime), x);
696 14 : ptr += BN_num_bytes(data->grp->prime);
697 14 : BN_bin2bn(ptr, BN_num_bytes(data->grp->prime), y);
698 14 : ptr += BN_num_bytes(data->grp->prime);
699 14 : BN_bin2bn(ptr, BN_num_bytes(data->grp->order), data->peer_scalar);
700 14 : if (!EC_POINT_set_affine_coordinates_GFp(data->grp->group,
701 : data->peer_element, x, y,
702 : data->bnctx)) {
703 0 : wpa_printf(MSG_INFO, "EAP-PWD (server): setting peer element "
704 : "fail");
705 0 : goto fin;
706 : }
707 :
708 : /* check to ensure peer's element is not in a small sub-group */
709 14 : if (BN_cmp(cofactor, BN_value_one())) {
710 0 : if (!EC_POINT_mul(data->grp->group, point, NULL,
711 0 : data->peer_element, cofactor, NULL)) {
712 0 : wpa_printf(MSG_INFO, "EAP-PWD (server): cannot "
713 : "multiply peer element by order");
714 0 : goto fin;
715 : }
716 0 : if (EC_POINT_is_at_infinity(data->grp->group, point)) {
717 0 : wpa_printf(MSG_INFO, "EAP-PWD (server): peer element "
718 : "is at infinity!\n");
719 0 : goto fin;
720 : }
721 : }
722 :
723 : /* compute the shared key, k */
724 28 : if ((!EC_POINT_mul(data->grp->group, K, NULL, data->grp->pwe,
725 28 : data->peer_scalar, data->bnctx)) ||
726 14 : (!EC_POINT_add(data->grp->group, K, K, data->peer_element,
727 14 : data->bnctx)) ||
728 14 : (!EC_POINT_mul(data->grp->group, K, NULL, K, data->private_value,
729 : data->bnctx))) {
730 0 : wpa_printf(MSG_INFO, "EAP-PWD (server): computing shared key "
731 : "fail");
732 0 : goto fin;
733 : }
734 :
735 : /* ensure that the shared key isn't in a small sub-group */
736 14 : if (BN_cmp(cofactor, BN_value_one())) {
737 0 : if (!EC_POINT_mul(data->grp->group, K, NULL, K, cofactor,
738 : NULL)) {
739 0 : wpa_printf(MSG_INFO, "EAP-PWD (server): cannot "
740 : "multiply shared key point by order!\n");
741 0 : goto fin;
742 : }
743 : }
744 :
745 : /*
746 : * This check is strictly speaking just for the case above where
747 : * co-factor > 1 but it was suggested that even though this is probably
748 : * never going to happen it is a simple and safe check "just to be
749 : * sure" so let's be safe.
750 : */
751 14 : if (EC_POINT_is_at_infinity(data->grp->group, K)) {
752 0 : wpa_printf(MSG_INFO, "EAP-PWD (server): shared key point is "
753 : "at infinity");
754 0 : goto fin;
755 : }
756 14 : if (!EC_POINT_get_affine_coordinates_GFp(data->grp->group, K, data->k,
757 : NULL, data->bnctx)) {
758 0 : wpa_printf(MSG_INFO, "EAP-PWD (server): unable to extract "
759 : "shared secret from secret point");
760 0 : goto fin;
761 : }
762 14 : res = 1;
763 :
764 : fin:
765 14 : EC_POINT_clear_free(K);
766 14 : EC_POINT_clear_free(point);
767 14 : BN_clear_free(cofactor);
768 14 : BN_clear_free(x);
769 14 : BN_clear_free(y);
770 :
771 14 : if (res)
772 14 : eap_pwd_state(data, PWD_Confirm_Req);
773 : else
774 0 : eap_pwd_state(data, FAILURE);
775 14 : }
776 :
777 :
778 : static void
779 13 : eap_pwd_process_confirm_resp(struct eap_sm *sm, struct eap_pwd_data *data,
780 : const u8 *payload, size_t payload_len)
781 : {
782 13 : BIGNUM *x = NULL, *y = NULL;
783 : struct crypto_hash *hash;
784 : u32 cs;
785 : u16 grp;
786 13 : u8 conf[SHA256_MAC_LEN], *cruft = NULL, *ptr;
787 : int offset;
788 :
789 13 : if (payload_len != SHA256_MAC_LEN) {
790 0 : wpa_printf(MSG_INFO,
791 : "EAP-pwd: Unexpected Confirm payload length %u (expected %u)",
792 : (unsigned int) payload_len, SHA256_MAC_LEN);
793 0 : goto fin;
794 : }
795 :
796 : /* build up the ciphersuite: group | random_function | prf */
797 13 : grp = htons(data->group_num);
798 13 : ptr = (u8 *) &cs;
799 13 : os_memcpy(ptr, &grp, sizeof(u16));
800 13 : ptr += sizeof(u16);
801 13 : *ptr = EAP_PWD_DEFAULT_RAND_FUNC;
802 13 : ptr += sizeof(u8);
803 13 : *ptr = EAP_PWD_DEFAULT_PRF;
804 :
805 : /* each component of the cruft will be at most as big as the prime */
806 13 : if (((cruft = os_malloc(BN_num_bytes(data->grp->prime))) == NULL) ||
807 13 : ((x = BN_new()) == NULL) || ((y = BN_new()) == NULL)) {
808 0 : wpa_printf(MSG_INFO, "EAP-PWD (peer): allocation fail");
809 0 : goto fin;
810 : }
811 :
812 : /*
813 : * commit is H(k | peer_element | peer_scalar | server_element |
814 : * server_scalar | ciphersuite)
815 : */
816 13 : hash = eap_pwd_h_init();
817 13 : if (hash == NULL)
818 0 : goto fin;
819 :
820 : /* k */
821 13 : os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
822 13 : offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(data->k);
823 13 : BN_bn2bin(data->k, cruft + offset);
824 13 : eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
825 :
826 : /* peer element: x, y */
827 26 : if (!EC_POINT_get_affine_coordinates_GFp(data->grp->group,
828 13 : data->peer_element, x, y,
829 : data->bnctx)) {
830 0 : wpa_printf(MSG_INFO, "EAP-PWD (server): confirm point "
831 : "assignment fail");
832 0 : goto fin;
833 : }
834 13 : os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
835 13 : offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(x);
836 13 : BN_bn2bin(x, cruft + offset);
837 13 : eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
838 13 : os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
839 13 : offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(y);
840 13 : BN_bn2bin(y, cruft + offset);
841 13 : eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
842 :
843 : /* peer scalar */
844 13 : os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
845 26 : offset = BN_num_bytes(data->grp->order) -
846 13 : BN_num_bytes(data->peer_scalar);
847 13 : BN_bn2bin(data->peer_scalar, cruft + offset);
848 13 : eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->order));
849 :
850 : /* server element: x, y */
851 26 : if (!EC_POINT_get_affine_coordinates_GFp(data->grp->group,
852 13 : data->my_element, x, y,
853 : data->bnctx)) {
854 0 : wpa_printf(MSG_INFO, "EAP-PWD (server): confirm point "
855 : "assignment fail");
856 0 : goto fin;
857 : }
858 :
859 13 : os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
860 13 : offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(x);
861 13 : BN_bn2bin(x, cruft + offset);
862 13 : eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
863 13 : os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
864 13 : offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(y);
865 13 : BN_bn2bin(y, cruft + offset);
866 13 : eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
867 :
868 : /* server scalar */
869 13 : os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
870 26 : offset = BN_num_bytes(data->grp->order) -
871 13 : BN_num_bytes(data->my_scalar);
872 13 : BN_bn2bin(data->my_scalar, cruft + offset);
873 13 : eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->order));
874 :
875 : /* ciphersuite */
876 13 : os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
877 13 : eap_pwd_h_update(hash, (u8 *) &cs, sizeof(u32));
878 :
879 : /* all done */
880 13 : eap_pwd_h_final(hash, conf);
881 :
882 13 : ptr = (u8 *) payload;
883 13 : if (os_memcmp_const(conf, ptr, SHA256_MAC_LEN)) {
884 0 : wpa_printf(MSG_INFO, "EAP-PWD (server): confirm did not "
885 : "verify");
886 0 : goto fin;
887 : }
888 :
889 13 : wpa_printf(MSG_DEBUG, "EAP-pwd (server): confirm verified");
890 13 : if (compute_keys(data->grp, data->bnctx, data->k,
891 13 : data->peer_scalar, data->my_scalar, conf,
892 13 : data->my_confirm, &cs, data->msk, data->emsk,
893 13 : data->session_id) < 0)
894 0 : eap_pwd_state(data, FAILURE);
895 : else
896 13 : eap_pwd_state(data, SUCCESS);
897 :
898 : fin:
899 13 : bin_clear_free(cruft, BN_num_bytes(data->grp->prime));
900 13 : BN_clear_free(x);
901 13 : BN_clear_free(y);
902 13 : }
903 :
904 :
905 53 : static void eap_pwd_process(struct eap_sm *sm, void *priv,
906 : struct wpabuf *respData)
907 : {
908 53 : struct eap_pwd_data *data = priv;
909 : const u8 *pos;
910 : size_t len;
911 : u8 lm_exch;
912 : u16 tot_len;
913 :
914 53 : pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_PWD, respData, &len);
915 53 : if ((pos == NULL) || (len < 1)) {
916 0 : wpa_printf(MSG_INFO, "Bad EAP header! pos %s and len = %d",
917 : (pos == NULL) ? "is NULL" : "is not NULL",
918 : (int) len);
919 0 : return;
920 : }
921 :
922 53 : lm_exch = *pos;
923 53 : pos++; /* skip over the bits and the exch */
924 53 : len--;
925 :
926 : /*
927 : * if we're fragmenting then this should be an ACK with no data,
928 : * just return and continue fragmenting in the "build" section above
929 : */
930 53 : if (data->out_frag_pos) {
931 2 : if (len > 1)
932 0 : wpa_printf(MSG_INFO, "EAP-pwd: Bad response! "
933 : "Fragmenting but not an ACK");
934 : else
935 2 : wpa_printf(MSG_DEBUG, "EAP-pwd: received ACK from "
936 : "peer");
937 2 : return;
938 : }
939 : /*
940 : * if we're receiving fragmented packets then we need to buffer...
941 : *
942 : * the first fragment has a total length
943 : */
944 51 : if (EAP_PWD_GET_LENGTH_BIT(lm_exch)) {
945 5 : if (len < 2) {
946 0 : wpa_printf(MSG_DEBUG,
947 : "EAP-pwd: Frame too short to contain Total-Length field");
948 0 : return;
949 : }
950 5 : tot_len = WPA_GET_BE16(pos);
951 5 : wpa_printf(MSG_DEBUG, "EAP-pwd: Incoming fragments, total "
952 : "length = %d", tot_len);
953 5 : if (tot_len > 15000)
954 0 : return;
955 5 : if (data->inbuf) {
956 0 : wpa_printf(MSG_DEBUG,
957 : "EAP-pwd: Unexpected new fragment start when previous fragment is still in use");
958 0 : return;
959 : }
960 5 : data->inbuf = wpabuf_alloc(tot_len);
961 5 : if (data->inbuf == NULL) {
962 0 : wpa_printf(MSG_INFO, "EAP-pwd: Out of memory to "
963 : "buffer fragments!");
964 0 : return;
965 : }
966 5 : data->in_frag_pos = 0;
967 5 : pos += sizeof(u16);
968 5 : len -= sizeof(u16);
969 : }
970 : /*
971 : * the first and all intermediate fragments have the M bit set
972 : */
973 51 : if (EAP_PWD_GET_MORE_BIT(lm_exch)) {
974 10 : if ((data->in_frag_pos + len) > wpabuf_size(data->inbuf)) {
975 0 : wpa_printf(MSG_DEBUG, "EAP-pwd: Buffer overflow "
976 : "attack detected! (%d+%d > %d)",
977 0 : (int) data->in_frag_pos, (int) len,
978 0 : (int) wpabuf_size(data->inbuf));
979 0 : eap_pwd_state(data, FAILURE);
980 0 : return;
981 : }
982 10 : wpabuf_put_data(data->inbuf, pos, len);
983 10 : data->in_frag_pos += len;
984 10 : wpa_printf(MSG_DEBUG, "EAP-pwd: Got a %d byte fragment",
985 : (int) len);
986 10 : return;
987 : }
988 : /*
989 : * last fragment won't have the M bit set (but we're obviously
990 : * buffering fragments so that's how we know it's the last)
991 : */
992 41 : if (data->in_frag_pos) {
993 5 : wpabuf_put_data(data->inbuf, pos, len);
994 5 : data->in_frag_pos += len;
995 5 : pos = wpabuf_head_u8(data->inbuf);
996 5 : len = data->in_frag_pos;
997 5 : wpa_printf(MSG_DEBUG, "EAP-pwd: Last fragment, %d bytes",
998 : (int) len);
999 : }
1000 41 : switch (EAP_PWD_GET_EXCHANGE(lm_exch)) {
1001 : case EAP_PWD_OPCODE_ID_EXCH:
1002 14 : eap_pwd_process_id_resp(sm, data, pos, len);
1003 14 : break;
1004 : case EAP_PWD_OPCODE_COMMIT_EXCH:
1005 14 : eap_pwd_process_commit_resp(sm, data, pos, len);
1006 14 : break;
1007 : case EAP_PWD_OPCODE_CONFIRM_EXCH:
1008 13 : eap_pwd_process_confirm_resp(sm, data, pos, len);
1009 13 : break;
1010 : }
1011 : /*
1012 : * if we had been buffering fragments, here's a great place
1013 : * to clean up
1014 : */
1015 41 : if (data->in_frag_pos) {
1016 5 : wpabuf_free(data->inbuf);
1017 5 : data->inbuf = NULL;
1018 5 : data->in_frag_pos = 0;
1019 : }
1020 : }
1021 :
1022 :
1023 13 : static u8 * eap_pwd_getkey(struct eap_sm *sm, void *priv, size_t *len)
1024 : {
1025 13 : struct eap_pwd_data *data = priv;
1026 : u8 *key;
1027 :
1028 13 : if (data->state != SUCCESS)
1029 0 : return NULL;
1030 :
1031 13 : key = os_malloc(EAP_MSK_LEN);
1032 13 : if (key == NULL)
1033 0 : return NULL;
1034 :
1035 13 : os_memcpy(key, data->msk, EAP_MSK_LEN);
1036 13 : *len = EAP_MSK_LEN;
1037 :
1038 13 : return key;
1039 : }
1040 :
1041 :
1042 1 : static u8 * eap_pwd_get_emsk(struct eap_sm *sm, void *priv, size_t *len)
1043 : {
1044 1 : struct eap_pwd_data *data = priv;
1045 : u8 *key;
1046 :
1047 1 : if (data->state != SUCCESS)
1048 0 : return NULL;
1049 :
1050 1 : key = os_malloc(EAP_EMSK_LEN);
1051 1 : if (key == NULL)
1052 0 : return NULL;
1053 :
1054 1 : os_memcpy(key, data->emsk, EAP_EMSK_LEN);
1055 1 : *len = EAP_EMSK_LEN;
1056 :
1057 1 : return key;
1058 : }
1059 :
1060 :
1061 13 : static Boolean eap_pwd_is_success(struct eap_sm *sm, void *priv)
1062 : {
1063 13 : struct eap_pwd_data *data = priv;
1064 13 : return data->state == SUCCESS;
1065 : }
1066 :
1067 :
1068 53 : static Boolean eap_pwd_is_done(struct eap_sm *sm, void *priv)
1069 : {
1070 53 : struct eap_pwd_data *data = priv;
1071 53 : return (data->state == SUCCESS) || (data->state == FAILURE);
1072 : }
1073 :
1074 :
1075 13 : static u8 * eap_pwd_get_session_id(struct eap_sm *sm, void *priv, size_t *len)
1076 : {
1077 13 : struct eap_pwd_data *data = priv;
1078 : u8 *id;
1079 :
1080 13 : if (data->state != SUCCESS)
1081 0 : return NULL;
1082 :
1083 13 : id = os_malloc(1 + SHA256_MAC_LEN);
1084 13 : if (id == NULL)
1085 0 : return NULL;
1086 :
1087 13 : os_memcpy(id, data->session_id, 1 + SHA256_MAC_LEN);
1088 13 : *len = 1 + SHA256_MAC_LEN;
1089 :
1090 13 : return id;
1091 : }
1092 :
1093 :
1094 25 : int eap_server_pwd_register(void)
1095 : {
1096 : struct eap_method *eap;
1097 : int ret;
1098 : struct timeval tp;
1099 : struct timezone tz;
1100 : u32 sr;
1101 :
1102 25 : sr = 0xdeaddada;
1103 25 : (void) gettimeofday(&tp, &tz);
1104 25 : sr ^= (tp.tv_sec ^ tp.tv_usec);
1105 25 : srandom(sr);
1106 :
1107 25 : eap = eap_server_method_alloc(EAP_SERVER_METHOD_INTERFACE_VERSION,
1108 : EAP_VENDOR_IETF, EAP_TYPE_PWD,
1109 : "PWD");
1110 25 : if (eap == NULL)
1111 0 : return -1;
1112 :
1113 25 : eap->init = eap_pwd_init;
1114 25 : eap->reset = eap_pwd_reset;
1115 25 : eap->buildReq = eap_pwd_build_req;
1116 25 : eap->check = eap_pwd_check;
1117 25 : eap->process = eap_pwd_process;
1118 25 : eap->isDone = eap_pwd_is_done;
1119 25 : eap->getKey = eap_pwd_getkey;
1120 25 : eap->get_emsk = eap_pwd_get_emsk;
1121 25 : eap->isSuccess = eap_pwd_is_success;
1122 25 : eap->getSessionId = eap_pwd_get_session_id;
1123 :
1124 25 : ret = eap_server_method_register(eap);
1125 25 : if (ret)
1126 0 : eap_server_method_free(eap);
1127 25 : return ret;
1128 : }
1129 :
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