1 /*
2 * hostapd / EAP-GPSK (RFC 5433) server
3 * Copyright (c) 2006-2007, Jouni Malinen <j@w1.fi>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 */
14
15 #include "includes.h"
16
17 #include "common.h"
18 #include "eap_server/eap_i.h"
19 #include "eap_common/eap_gpsk_common.h"
20
21
22 struct eap_gpsk_data {
23 enum { GPSK_1, GPSK_3, SUCCESS, FAILURE } state;
24 u8 rand_server[EAP_GPSK_RAND_LEN];
25 u8 rand_peer[EAP_GPSK_RAND_LEN];
26 u8 msk[EAP_MSK_LEN];
27 u8 emsk[EAP_EMSK_LEN];
28 u8 sk[EAP_GPSK_MAX_SK_LEN];
29 size_t sk_len;
30 u8 pk[EAP_GPSK_MAX_PK_LEN];
31 size_t pk_len;
32 u8 *id_peer;
33 size_t id_peer_len;
34 u8 *id_server;
35 size_t id_server_len;
36 #define MAX_NUM_CSUITES 2
37 struct eap_gpsk_csuite csuite_list[MAX_NUM_CSUITES];
38 size_t csuite_count;
39 int vendor; /* CSuite/Vendor */
40 int specifier; /* CSuite/Specifier */
41 };
42
43
eap_gpsk_state_txt(int state)44 static const char * eap_gpsk_state_txt(int state)
45 {
46 switch (state) {
47 case GPSK_1:
48 return "GPSK-1";
49 case GPSK_3:
50 return "GPSK-3";
51 case SUCCESS:
52 return "SUCCESS";
53 case FAILURE:
54 return "FAILURE";
55 default:
56 return "?";
57 }
58 }
59
60
eap_gpsk_state(struct eap_gpsk_data * data,int state)61 static void eap_gpsk_state(struct eap_gpsk_data *data, int state)
62 {
63 wpa_printf(MSG_DEBUG, "EAP-GPSK: %s -> %s",
64 eap_gpsk_state_txt(data->state),
65 eap_gpsk_state_txt(state));
66 data->state = state;
67 }
68
69
eap_gpsk_init(struct eap_sm * sm)70 static void * eap_gpsk_init(struct eap_sm *sm)
71 {
72 struct eap_gpsk_data *data;
73
74 data = os_zalloc(sizeof(*data));
75 if (data == NULL)
76 return NULL;
77 data->state = GPSK_1;
78
79 /* TODO: add support for configuring ID_Server */
80 data->id_server = (u8 *) os_strdup("hostapd");
81 if (data->id_server)
82 data->id_server_len = os_strlen((char *) data->id_server);
83
84 data->csuite_count = 0;
85 if (eap_gpsk_supported_ciphersuite(EAP_GPSK_VENDOR_IETF,
86 EAP_GPSK_CIPHER_AES)) {
87 WPA_PUT_BE32(data->csuite_list[data->csuite_count].vendor,
88 EAP_GPSK_VENDOR_IETF);
89 WPA_PUT_BE16(data->csuite_list[data->csuite_count].specifier,
90 EAP_GPSK_CIPHER_AES);
91 data->csuite_count++;
92 }
93 if (eap_gpsk_supported_ciphersuite(EAP_GPSK_VENDOR_IETF,
94 EAP_GPSK_CIPHER_SHA256)) {
95 WPA_PUT_BE32(data->csuite_list[data->csuite_count].vendor,
96 EAP_GPSK_VENDOR_IETF);
97 WPA_PUT_BE16(data->csuite_list[data->csuite_count].specifier,
98 EAP_GPSK_CIPHER_SHA256);
99 data->csuite_count++;
100 }
101
102 return data;
103 }
104
105
eap_gpsk_reset(struct eap_sm * sm,void * priv)106 static void eap_gpsk_reset(struct eap_sm *sm, void *priv)
107 {
108 struct eap_gpsk_data *data = priv;
109 os_free(data->id_server);
110 os_free(data->id_peer);
111 os_free(data);
112 }
113
114
eap_gpsk_build_gpsk_1(struct eap_sm * sm,struct eap_gpsk_data * data,u8 id)115 static struct wpabuf * eap_gpsk_build_gpsk_1(struct eap_sm *sm,
116 struct eap_gpsk_data *data, u8 id)
117 {
118 size_t len;
119 struct wpabuf *req;
120
121 wpa_printf(MSG_DEBUG, "EAP-GPSK: Request/GPSK-1");
122
123 if (os_get_random(data->rand_server, EAP_GPSK_RAND_LEN)) {
124 wpa_printf(MSG_ERROR, "EAP-GPSK: Failed to get random data");
125 eap_gpsk_state(data, FAILURE);
126 return NULL;
127 }
128 wpa_hexdump(MSG_MSGDUMP, "EAP-GPSK: RAND_Server",
129 data->rand_server, EAP_GPSK_RAND_LEN);
130
131 len = 1 + 2 + data->id_server_len + EAP_GPSK_RAND_LEN + 2 +
132 data->csuite_count * sizeof(struct eap_gpsk_csuite);
133 req = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_GPSK, len,
134 EAP_CODE_REQUEST, id);
135 if (req == NULL) {
136 wpa_printf(MSG_ERROR, "EAP-GPSK: Failed to allocate memory "
137 "for request/GPSK-1");
138 eap_gpsk_state(data, FAILURE);
139 return NULL;
140 }
141
142 wpabuf_put_u8(req, EAP_GPSK_OPCODE_GPSK_1);
143 wpabuf_put_be16(req, data->id_server_len);
144 wpabuf_put_data(req, data->id_server, data->id_server_len);
145 wpabuf_put_data(req, data->rand_server, EAP_GPSK_RAND_LEN);
146 wpabuf_put_be16(req,
147 data->csuite_count * sizeof(struct eap_gpsk_csuite));
148 wpabuf_put_data(req, data->csuite_list,
149 data->csuite_count * sizeof(struct eap_gpsk_csuite));
150
151 return req;
152 }
153
154
eap_gpsk_build_gpsk_3(struct eap_sm * sm,struct eap_gpsk_data * data,u8 id)155 static struct wpabuf * eap_gpsk_build_gpsk_3(struct eap_sm *sm,
156 struct eap_gpsk_data *data, u8 id)
157 {
158 u8 *pos, *start;
159 size_t len, miclen;
160 struct eap_gpsk_csuite *csuite;
161 struct wpabuf *req;
162
163 wpa_printf(MSG_DEBUG, "EAP-GPSK: Request/GPSK-3");
164
165 miclen = eap_gpsk_mic_len(data->vendor, data->specifier);
166 len = 1 + 2 * EAP_GPSK_RAND_LEN + 2 + data->id_server_len +
167 sizeof(struct eap_gpsk_csuite) + 2 + miclen;
168 req = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_GPSK, len,
169 EAP_CODE_REQUEST, id);
170 if (req == NULL) {
171 wpa_printf(MSG_ERROR, "EAP-GPSK: Failed to allocate memory "
172 "for request/GPSK-3");
173 eap_gpsk_state(data, FAILURE);
174 return NULL;
175 }
176
177 wpabuf_put_u8(req, EAP_GPSK_OPCODE_GPSK_3);
178 start = wpabuf_put(req, 0);
179
180 wpabuf_put_data(req, data->rand_peer, EAP_GPSK_RAND_LEN);
181 wpabuf_put_data(req, data->rand_server, EAP_GPSK_RAND_LEN);
182 wpabuf_put_be16(req, data->id_server_len);
183 wpabuf_put_data(req, data->id_server, data->id_server_len);
184 csuite = wpabuf_put(req, sizeof(*csuite));
185 WPA_PUT_BE32(csuite->vendor, data->vendor);
186 WPA_PUT_BE16(csuite->specifier, data->specifier);
187
188 /* no PD_Payload_2 */
189 wpabuf_put_be16(req, 0);
190
191 pos = wpabuf_put(req, miclen);
192 if (eap_gpsk_compute_mic(data->sk, data->sk_len, data->vendor,
193 data->specifier, start, pos - start, pos) < 0)
194 {
195 os_free(req);
196 eap_gpsk_state(data, FAILURE);
197 return NULL;
198 }
199
200 return req;
201 }
202
203
eap_gpsk_buildReq(struct eap_sm * sm,void * priv,u8 id)204 static struct wpabuf * eap_gpsk_buildReq(struct eap_sm *sm, void *priv, u8 id)
205 {
206 struct eap_gpsk_data *data = priv;
207
208 switch (data->state) {
209 case GPSK_1:
210 return eap_gpsk_build_gpsk_1(sm, data, id);
211 case GPSK_3:
212 return eap_gpsk_build_gpsk_3(sm, data, id);
213 default:
214 wpa_printf(MSG_DEBUG, "EAP-GPSK: Unknown state %d in buildReq",
215 data->state);
216 break;
217 }
218 return NULL;
219 }
220
221
eap_gpsk_check(struct eap_sm * sm,void * priv,struct wpabuf * respData)222 static Boolean eap_gpsk_check(struct eap_sm *sm, void *priv,
223 struct wpabuf *respData)
224 {
225 struct eap_gpsk_data *data = priv;
226 const u8 *pos;
227 size_t len;
228
229 pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_GPSK, respData, &len);
230 if (pos == NULL || len < 1) {
231 wpa_printf(MSG_INFO, "EAP-GPSK: Invalid frame");
232 return TRUE;
233 }
234
235 wpa_printf(MSG_DEBUG, "EAP-GPSK: Received frame: opcode=%d", *pos);
236
237 if (data->state == GPSK_1 && *pos == EAP_GPSK_OPCODE_GPSK_2)
238 return FALSE;
239
240 if (data->state == GPSK_3 && *pos == EAP_GPSK_OPCODE_GPSK_4)
241 return FALSE;
242
243 wpa_printf(MSG_INFO, "EAP-GPSK: Unexpected opcode=%d in state=%d",
244 *pos, data->state);
245
246 return TRUE;
247 }
248
249
eap_gpsk_process_gpsk_2(struct eap_sm * sm,struct eap_gpsk_data * data,const u8 * payload,size_t payloadlen)250 static void eap_gpsk_process_gpsk_2(struct eap_sm *sm,
251 struct eap_gpsk_data *data,
252 const u8 *payload, size_t payloadlen)
253 {
254 const u8 *pos, *end;
255 u16 alen;
256 const struct eap_gpsk_csuite *csuite;
257 size_t i, miclen;
258 u8 mic[EAP_GPSK_MAX_MIC_LEN];
259
260 if (data->state != GPSK_1)
261 return;
262
263 wpa_printf(MSG_DEBUG, "EAP-GPSK: Received Response/GPSK-2");
264
265 pos = payload;
266 end = payload + payloadlen;
267
268 if (end - pos < 2) {
269 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
270 "ID_Peer length");
271 eap_gpsk_state(data, FAILURE);
272 return;
273 }
274 alen = WPA_GET_BE16(pos);
275 pos += 2;
276 if (end - pos < alen) {
277 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
278 "ID_Peer");
279 eap_gpsk_state(data, FAILURE);
280 return;
281 }
282 os_free(data->id_peer);
283 data->id_peer = os_malloc(alen);
284 if (data->id_peer == NULL) {
285 wpa_printf(MSG_DEBUG, "EAP-GPSK: Not enough memory to store "
286 "%d-octet ID_Peer", alen);
287 return;
288 }
289 os_memcpy(data->id_peer, pos, alen);
290 data->id_peer_len = alen;
291 wpa_hexdump_ascii(MSG_DEBUG, "EAP-GPSK: ID_Peer",
292 data->id_peer, data->id_peer_len);
293 pos += alen;
294
295 if (end - pos < 2) {
296 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
297 "ID_Server length");
298 eap_gpsk_state(data, FAILURE);
299 return;
300 }
301 alen = WPA_GET_BE16(pos);
302 pos += 2;
303 if (end - pos < alen) {
304 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
305 "ID_Server");
306 eap_gpsk_state(data, FAILURE);
307 return;
308 }
309 if (alen != data->id_server_len ||
310 os_memcmp(pos, data->id_server, alen) != 0) {
311 wpa_printf(MSG_DEBUG, "EAP-GPSK: ID_Server in GPSK-1 and "
312 "GPSK-2 did not match");
313 eap_gpsk_state(data, FAILURE);
314 return;
315 }
316 pos += alen;
317
318 if (end - pos < EAP_GPSK_RAND_LEN) {
319 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
320 "RAND_Peer");
321 eap_gpsk_state(data, FAILURE);
322 return;
323 }
324 os_memcpy(data->rand_peer, pos, EAP_GPSK_RAND_LEN);
325 wpa_hexdump(MSG_DEBUG, "EAP-GPSK: RAND_Peer",
326 data->rand_peer, EAP_GPSK_RAND_LEN);
327 pos += EAP_GPSK_RAND_LEN;
328
329 if (end - pos < EAP_GPSK_RAND_LEN) {
330 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
331 "RAND_Server");
332 eap_gpsk_state(data, FAILURE);
333 return;
334 }
335 if (os_memcmp(data->rand_server, pos, EAP_GPSK_RAND_LEN) != 0) {
336 wpa_printf(MSG_DEBUG, "EAP-GPSK: RAND_Server in GPSK-1 and "
337 "GPSK-2 did not match");
338 wpa_hexdump(MSG_DEBUG, "EAP-GPSK: RAND_Server in GPSK-1",
339 data->rand_server, EAP_GPSK_RAND_LEN);
340 wpa_hexdump(MSG_DEBUG, "EAP-GPSK: RAND_Server in GPSK-2",
341 pos, EAP_GPSK_RAND_LEN);
342 eap_gpsk_state(data, FAILURE);
343 return;
344 }
345 pos += EAP_GPSK_RAND_LEN;
346
347 if (end - pos < 2) {
348 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
349 "CSuite_List length");
350 eap_gpsk_state(data, FAILURE);
351 return;
352 }
353 alen = WPA_GET_BE16(pos);
354 pos += 2;
355 if (end - pos < alen) {
356 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
357 "CSuite_List");
358 eap_gpsk_state(data, FAILURE);
359 return;
360 }
361 if (alen != data->csuite_count * sizeof(struct eap_gpsk_csuite) ||
362 os_memcmp(pos, data->csuite_list, alen) != 0) {
363 wpa_printf(MSG_DEBUG, "EAP-GPSK: CSuite_List in GPSK-1 and "
364 "GPSK-2 did not match");
365 eap_gpsk_state(data, FAILURE);
366 return;
367 }
368 pos += alen;
369
370 if (end - pos < (int) sizeof(*csuite)) {
371 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
372 "CSuite_Sel");
373 eap_gpsk_state(data, FAILURE);
374 return;
375 }
376 csuite = (const struct eap_gpsk_csuite *) pos;
377 for (i = 0; i < data->csuite_count; i++) {
378 if (os_memcmp(csuite, &data->csuite_list[i], sizeof(*csuite))
379 == 0)
380 break;
381 }
382 if (i == data->csuite_count) {
383 wpa_printf(MSG_DEBUG, "EAP-GPSK: Peer selected unsupported "
384 "ciphersuite %d:%d",
385 WPA_GET_BE32(csuite->vendor),
386 WPA_GET_BE16(csuite->specifier));
387 eap_gpsk_state(data, FAILURE);
388 return;
389 }
390 data->vendor = WPA_GET_BE32(csuite->vendor);
391 data->specifier = WPA_GET_BE16(csuite->specifier);
392 wpa_printf(MSG_DEBUG, "EAP-GPSK: CSuite_Sel %d:%d",
393 data->vendor, data->specifier);
394 pos += sizeof(*csuite);
395
396 if (end - pos < 2) {
397 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
398 "PD_Payload_1 length");
399 eap_gpsk_state(data, FAILURE);
400 return;
401 }
402 alen = WPA_GET_BE16(pos);
403 pos += 2;
404 if (end - pos < alen) {
405 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
406 "PD_Payload_1");
407 eap_gpsk_state(data, FAILURE);
408 return;
409 }
410 wpa_hexdump(MSG_DEBUG, "EAP-GPSK: PD_Payload_1", pos, alen);
411 pos += alen;
412
413 if (sm->user == NULL || sm->user->password == NULL) {
414 wpa_printf(MSG_INFO, "EAP-GPSK: No PSK/password configured "
415 "for the user");
416 eap_gpsk_state(data, FAILURE);
417 return;
418 }
419
420 if (eap_gpsk_derive_keys(sm->user->password, sm->user->password_len,
421 data->vendor, data->specifier,
422 data->rand_peer, data->rand_server,
423 data->id_peer, data->id_peer_len,
424 data->id_server, data->id_server_len,
425 data->msk, data->emsk,
426 data->sk, &data->sk_len,
427 data->pk, &data->pk_len) < 0) {
428 wpa_printf(MSG_DEBUG, "EAP-GPSK: Failed to derive keys");
429 eap_gpsk_state(data, FAILURE);
430 return;
431 }
432
433 miclen = eap_gpsk_mic_len(data->vendor, data->specifier);
434 if (end - pos < (int) miclen) {
435 wpa_printf(MSG_DEBUG, "EAP-GPSK: Message too short for MIC "
436 "(left=%lu miclen=%lu)",
437 (unsigned long) (end - pos),
438 (unsigned long) miclen);
439 eap_gpsk_state(data, FAILURE);
440 return;
441 }
442 if (eap_gpsk_compute_mic(data->sk, data->sk_len, data->vendor,
443 data->specifier, payload, pos - payload, mic)
444 < 0) {
445 wpa_printf(MSG_DEBUG, "EAP-GPSK: Failed to compute MIC");
446 eap_gpsk_state(data, FAILURE);
447 return;
448 }
449 if (os_memcmp(mic, pos, miclen) != 0) {
450 wpa_printf(MSG_INFO, "EAP-GPSK: Incorrect MIC in GPSK-2");
451 wpa_hexdump(MSG_DEBUG, "EAP-GPSK: Received MIC", pos, miclen);
452 wpa_hexdump(MSG_DEBUG, "EAP-GPSK: Computed MIC", mic, miclen);
453 eap_gpsk_state(data, FAILURE);
454 return;
455 }
456 pos += miclen;
457
458 if (pos != end) {
459 wpa_printf(MSG_DEBUG, "EAP-GPSK: Ignored %lu bytes of extra "
460 "data in the end of GPSK-2",
461 (unsigned long) (end - pos));
462 }
463
464 eap_gpsk_state(data, GPSK_3);
465 }
466
467
eap_gpsk_process_gpsk_4(struct eap_sm * sm,struct eap_gpsk_data * data,const u8 * payload,size_t payloadlen)468 static void eap_gpsk_process_gpsk_4(struct eap_sm *sm,
469 struct eap_gpsk_data *data,
470 const u8 *payload, size_t payloadlen)
471 {
472 const u8 *pos, *end;
473 u16 alen;
474 size_t miclen;
475 u8 mic[EAP_GPSK_MAX_MIC_LEN];
476
477 if (data->state != GPSK_3)
478 return;
479
480 wpa_printf(MSG_DEBUG, "EAP-GPSK: Received Response/GPSK-4");
481
482 pos = payload;
483 end = payload + payloadlen;
484
485 if (end - pos < 2) {
486 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
487 "PD_Payload_1 length");
488 eap_gpsk_state(data, FAILURE);
489 return;
490 }
491 alen = WPA_GET_BE16(pos);
492 pos += 2;
493 if (end - pos < alen) {
494 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
495 "PD_Payload_1");
496 eap_gpsk_state(data, FAILURE);
497 return;
498 }
499 wpa_hexdump(MSG_DEBUG, "EAP-GPSK: PD_Payload_1", pos, alen);
500 pos += alen;
501
502 miclen = eap_gpsk_mic_len(data->vendor, data->specifier);
503 if (end - pos < (int) miclen) {
504 wpa_printf(MSG_DEBUG, "EAP-GPSK: Message too short for MIC "
505 "(left=%lu miclen=%lu)",
506 (unsigned long) (end - pos),
507 (unsigned long) miclen);
508 eap_gpsk_state(data, FAILURE);
509 return;
510 }
511 if (eap_gpsk_compute_mic(data->sk, data->sk_len, data->vendor,
512 data->specifier, payload, pos - payload, mic)
513 < 0) {
514 wpa_printf(MSG_DEBUG, "EAP-GPSK: Failed to compute MIC");
515 eap_gpsk_state(data, FAILURE);
516 return;
517 }
518 if (os_memcmp(mic, pos, miclen) != 0) {
519 wpa_printf(MSG_INFO, "EAP-GPSK: Incorrect MIC in GPSK-4");
520 wpa_hexdump(MSG_DEBUG, "EAP-GPSK: Received MIC", pos, miclen);
521 wpa_hexdump(MSG_DEBUG, "EAP-GPSK: Computed MIC", mic, miclen);
522 eap_gpsk_state(data, FAILURE);
523 return;
524 }
525 pos += miclen;
526
527 if (pos != end) {
528 wpa_printf(MSG_DEBUG, "EAP-GPSK: Ignored %lu bytes of extra "
529 "data in the end of GPSK-4",
530 (unsigned long) (end - pos));
531 }
532
533 eap_gpsk_state(data, SUCCESS);
534 }
535
536
eap_gpsk_process(struct eap_sm * sm,void * priv,struct wpabuf * respData)537 static void eap_gpsk_process(struct eap_sm *sm, void *priv,
538 struct wpabuf *respData)
539 {
540 struct eap_gpsk_data *data = priv;
541 const u8 *pos;
542 size_t len;
543
544 pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_GPSK, respData, &len);
545 if (pos == NULL || len < 1)
546 return;
547
548 switch (*pos) {
549 case EAP_GPSK_OPCODE_GPSK_2:
550 eap_gpsk_process_gpsk_2(sm, data, pos + 1, len - 1);
551 break;
552 case EAP_GPSK_OPCODE_GPSK_4:
553 eap_gpsk_process_gpsk_4(sm, data, pos + 1, len - 1);
554 break;
555 }
556 }
557
558
eap_gpsk_isDone(struct eap_sm * sm,void * priv)559 static Boolean eap_gpsk_isDone(struct eap_sm *sm, void *priv)
560 {
561 struct eap_gpsk_data *data = priv;
562 return data->state == SUCCESS || data->state == FAILURE;
563 }
564
565
eap_gpsk_getKey(struct eap_sm * sm,void * priv,size_t * len)566 static u8 * eap_gpsk_getKey(struct eap_sm *sm, void *priv, size_t *len)
567 {
568 struct eap_gpsk_data *data = priv;
569 u8 *key;
570
571 if (data->state != SUCCESS)
572 return NULL;
573
574 key = os_malloc(EAP_MSK_LEN);
575 if (key == NULL)
576 return NULL;
577 os_memcpy(key, data->msk, EAP_MSK_LEN);
578 *len = EAP_MSK_LEN;
579
580 return key;
581 }
582
583
eap_gpsk_get_emsk(struct eap_sm * sm,void * priv,size_t * len)584 static u8 * eap_gpsk_get_emsk(struct eap_sm *sm, void *priv, size_t *len)
585 {
586 struct eap_gpsk_data *data = priv;
587 u8 *key;
588
589 if (data->state != SUCCESS)
590 return NULL;
591
592 key = os_malloc(EAP_EMSK_LEN);
593 if (key == NULL)
594 return NULL;
595 os_memcpy(key, data->emsk, EAP_EMSK_LEN);
596 *len = EAP_EMSK_LEN;
597
598 return key;
599 }
600
601
eap_gpsk_isSuccess(struct eap_sm * sm,void * priv)602 static Boolean eap_gpsk_isSuccess(struct eap_sm *sm, void *priv)
603 {
604 struct eap_gpsk_data *data = priv;
605 return data->state == SUCCESS;
606 }
607
608
eap_server_gpsk_register(void)609 int eap_server_gpsk_register(void)
610 {
611 struct eap_method *eap;
612 int ret;
613
614 eap = eap_server_method_alloc(EAP_SERVER_METHOD_INTERFACE_VERSION,
615 EAP_VENDOR_IETF, EAP_TYPE_GPSK, "GPSK");
616 if (eap == NULL)
617 return -1;
618
619 eap->init = eap_gpsk_init;
620 eap->reset = eap_gpsk_reset;
621 eap->buildReq = eap_gpsk_buildReq;
622 eap->check = eap_gpsk_check;
623 eap->process = eap_gpsk_process;
624 eap->isDone = eap_gpsk_isDone;
625 eap->getKey = eap_gpsk_getKey;
626 eap->isSuccess = eap_gpsk_isSuccess;
627 eap->get_emsk = eap_gpsk_get_emsk;
628
629 ret = eap_server_method_register(eap);
630 if (ret)
631 eap_server_method_free(eap);
632 return ret;
633 }
634