1 /*
2 * hostapd / EAP-GPSK (RFC 5433) server
3 * Copyright (c) 2006-2007, Jouni Malinen <j@w1.fi>
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/random.h"
13 #include "eap_server/eap_i.h"
14 #include "eap_common/eap_gpsk_common.h"
15
16
17 struct eap_gpsk_data {
18 enum { GPSK_1, GPSK_3, SUCCESS, FAILURE } state;
19 u8 rand_server[EAP_GPSK_RAND_LEN];
20 u8 rand_peer[EAP_GPSK_RAND_LEN];
21 u8 msk[EAP_MSK_LEN];
22 u8 emsk[EAP_EMSK_LEN];
23 u8 sk[EAP_GPSK_MAX_SK_LEN];
24 size_t sk_len;
25 u8 pk[EAP_GPSK_MAX_PK_LEN];
26 size_t pk_len;
27 u8 session_id[128];
28 size_t id_len;
29 u8 *id_peer;
30 size_t id_peer_len;
31 #define MAX_NUM_CSUITES 2
32 struct eap_gpsk_csuite csuite_list[MAX_NUM_CSUITES];
33 size_t csuite_count;
34 int vendor; /* CSuite/Vendor */
35 int specifier; /* CSuite/Specifier */
36 };
37
38
eap_gpsk_state_txt(int state)39 static const char * eap_gpsk_state_txt(int state)
40 {
41 switch (state) {
42 case GPSK_1:
43 return "GPSK-1";
44 case GPSK_3:
45 return "GPSK-3";
46 case SUCCESS:
47 return "SUCCESS";
48 case FAILURE:
49 return "FAILURE";
50 default:
51 return "?";
52 }
53 }
54
55
eap_gpsk_state(struct eap_gpsk_data * data,int state)56 static void eap_gpsk_state(struct eap_gpsk_data *data, int state)
57 {
58 wpa_printf(MSG_DEBUG, "EAP-GPSK: %s -> %s",
59 eap_gpsk_state_txt(data->state),
60 eap_gpsk_state_txt(state));
61 data->state = state;
62 }
63
64
eap_gpsk_init(struct eap_sm * sm)65 static void * eap_gpsk_init(struct eap_sm *sm)
66 {
67 struct eap_gpsk_data *data;
68
69 data = os_zalloc(sizeof(*data));
70 if (data == NULL)
71 return NULL;
72 data->state = GPSK_1;
73
74 data->csuite_count = 0;
75 if (eap_gpsk_supported_ciphersuite(EAP_GPSK_VENDOR_IETF,
76 EAP_GPSK_CIPHER_AES)) {
77 WPA_PUT_BE32(data->csuite_list[data->csuite_count].vendor,
78 EAP_GPSK_VENDOR_IETF);
79 WPA_PUT_BE16(data->csuite_list[data->csuite_count].specifier,
80 EAP_GPSK_CIPHER_AES);
81 data->csuite_count++;
82 }
83 if (eap_gpsk_supported_ciphersuite(EAP_GPSK_VENDOR_IETF,
84 EAP_GPSK_CIPHER_SHA256)) {
85 WPA_PUT_BE32(data->csuite_list[data->csuite_count].vendor,
86 EAP_GPSK_VENDOR_IETF);
87 WPA_PUT_BE16(data->csuite_list[data->csuite_count].specifier,
88 EAP_GPSK_CIPHER_SHA256);
89 data->csuite_count++;
90 }
91
92 return data;
93 }
94
95
eap_gpsk_reset(struct eap_sm * sm,void * priv)96 static void eap_gpsk_reset(struct eap_sm *sm, void *priv)
97 {
98 struct eap_gpsk_data *data = priv;
99 os_free(data->id_peer);
100 bin_clear_free(data, sizeof(*data));
101 }
102
103
eap_gpsk_build_gpsk_1(struct eap_sm * sm,struct eap_gpsk_data * data,u8 id)104 static struct wpabuf * eap_gpsk_build_gpsk_1(struct eap_sm *sm,
105 struct eap_gpsk_data *data, u8 id)
106 {
107 size_t len;
108 struct wpabuf *req;
109
110 wpa_printf(MSG_DEBUG, "EAP-GPSK: Request/GPSK-1");
111
112 if (random_get_bytes(data->rand_server, EAP_GPSK_RAND_LEN)) {
113 wpa_printf(MSG_ERROR, "EAP-GPSK: Failed to get random data");
114 eap_gpsk_state(data, FAILURE);
115 return NULL;
116 }
117 wpa_hexdump(MSG_MSGDUMP, "EAP-GPSK: RAND_Server",
118 data->rand_server, EAP_GPSK_RAND_LEN);
119
120 len = 1 + 2 + sm->cfg->server_id_len + EAP_GPSK_RAND_LEN + 2 +
121 data->csuite_count * sizeof(struct eap_gpsk_csuite);
122 req = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_GPSK, len,
123 EAP_CODE_REQUEST, id);
124 if (req == NULL) {
125 wpa_printf(MSG_ERROR, "EAP-GPSK: Failed to allocate memory "
126 "for request/GPSK-1");
127 eap_gpsk_state(data, FAILURE);
128 return NULL;
129 }
130
131 wpabuf_put_u8(req, EAP_GPSK_OPCODE_GPSK_1);
132 wpabuf_put_be16(req, sm->cfg->server_id_len);
133 wpabuf_put_data(req, sm->cfg->server_id, sm->cfg->server_id_len);
134 wpabuf_put_data(req, data->rand_server, EAP_GPSK_RAND_LEN);
135 wpabuf_put_be16(req,
136 data->csuite_count * sizeof(struct eap_gpsk_csuite));
137 wpabuf_put_data(req, data->csuite_list,
138 data->csuite_count * sizeof(struct eap_gpsk_csuite));
139
140 return req;
141 }
142
143
eap_gpsk_build_gpsk_3(struct eap_sm * sm,struct eap_gpsk_data * data,u8 id)144 static struct wpabuf * eap_gpsk_build_gpsk_3(struct eap_sm *sm,
145 struct eap_gpsk_data *data, u8 id)
146 {
147 u8 *pos, *start;
148 size_t len, miclen;
149 struct eap_gpsk_csuite *csuite;
150 struct wpabuf *req;
151
152 wpa_printf(MSG_DEBUG, "EAP-GPSK: Request/GPSK-3");
153
154 miclen = eap_gpsk_mic_len(data->vendor, data->specifier);
155 len = 1 + 2 * EAP_GPSK_RAND_LEN + 2 + sm->cfg->server_id_len +
156 sizeof(struct eap_gpsk_csuite) + 2 + miclen;
157 req = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_GPSK, len,
158 EAP_CODE_REQUEST, id);
159 if (req == NULL) {
160 wpa_printf(MSG_ERROR, "EAP-GPSK: Failed to allocate memory "
161 "for request/GPSK-3");
162 eap_gpsk_state(data, FAILURE);
163 return NULL;
164 }
165
166 wpabuf_put_u8(req, EAP_GPSK_OPCODE_GPSK_3);
167 start = wpabuf_put(req, 0);
168
169 wpabuf_put_data(req, data->rand_peer, EAP_GPSK_RAND_LEN);
170 wpabuf_put_data(req, data->rand_server, EAP_GPSK_RAND_LEN);
171 wpabuf_put_be16(req, sm->cfg->server_id_len);
172 wpabuf_put_data(req, sm->cfg->server_id, sm->cfg->server_id_len);
173 csuite = wpabuf_put(req, sizeof(*csuite));
174 WPA_PUT_BE32(csuite->vendor, data->vendor);
175 WPA_PUT_BE16(csuite->specifier, data->specifier);
176
177 /* no PD_Payload_2 */
178 wpabuf_put_be16(req, 0);
179
180 pos = wpabuf_put(req, miclen);
181 if (eap_gpsk_compute_mic(data->sk, data->sk_len, data->vendor,
182 data->specifier, start, pos - start, pos) < 0)
183 {
184 wpabuf_free(req);
185 eap_gpsk_state(data, FAILURE);
186 return NULL;
187 }
188
189 return req;
190 }
191
192
eap_gpsk_buildReq(struct eap_sm * sm,void * priv,u8 id)193 static struct wpabuf * eap_gpsk_buildReq(struct eap_sm *sm, void *priv, u8 id)
194 {
195 struct eap_gpsk_data *data = priv;
196
197 switch (data->state) {
198 case GPSK_1:
199 return eap_gpsk_build_gpsk_1(sm, data, id);
200 case GPSK_3:
201 return eap_gpsk_build_gpsk_3(sm, data, id);
202 default:
203 wpa_printf(MSG_DEBUG, "EAP-GPSK: Unknown state %d in buildReq",
204 data->state);
205 break;
206 }
207 return NULL;
208 }
209
210
eap_gpsk_check(struct eap_sm * sm,void * priv,struct wpabuf * respData)211 static bool eap_gpsk_check(struct eap_sm *sm, void *priv,
212 struct wpabuf *respData)
213 {
214 struct eap_gpsk_data *data = priv;
215 const u8 *pos;
216 size_t len;
217
218 pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_GPSK, respData, &len);
219 if (pos == NULL || len < 1) {
220 wpa_printf(MSG_INFO, "EAP-GPSK: Invalid frame");
221 return true;
222 }
223
224 wpa_printf(MSG_DEBUG, "EAP-GPSK: Received frame: opcode=%d", *pos);
225
226 if (data->state == GPSK_1 && *pos == EAP_GPSK_OPCODE_GPSK_2)
227 return false;
228
229 if (data->state == GPSK_3 && *pos == EAP_GPSK_OPCODE_GPSK_4)
230 return false;
231
232 wpa_printf(MSG_INFO, "EAP-GPSK: Unexpected opcode=%d in state=%d",
233 *pos, data->state);
234
235 return true;
236 }
237
238
eap_gpsk_process_gpsk_2(struct eap_sm * sm,struct eap_gpsk_data * data,const u8 * payload,size_t payloadlen)239 static void eap_gpsk_process_gpsk_2(struct eap_sm *sm,
240 struct eap_gpsk_data *data,
241 const u8 *payload, size_t payloadlen)
242 {
243 const u8 *pos, *end;
244 u16 alen;
245 const struct eap_gpsk_csuite *csuite;
246 size_t i, miclen;
247 u8 mic[EAP_GPSK_MAX_MIC_LEN];
248
249 if (data->state != GPSK_1)
250 return;
251
252 wpa_printf(MSG_DEBUG, "EAP-GPSK: Received Response/GPSK-2");
253
254 pos = payload;
255 end = payload + payloadlen;
256
257 if (end - pos < 2) {
258 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
259 "ID_Peer length");
260 eap_gpsk_state(data, FAILURE);
261 return;
262 }
263 alen = WPA_GET_BE16(pos);
264 pos += 2;
265 if (end - pos < alen) {
266 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
267 "ID_Peer");
268 eap_gpsk_state(data, FAILURE);
269 return;
270 }
271 os_free(data->id_peer);
272 data->id_peer = os_memdup(pos, alen);
273 if (data->id_peer == NULL) {
274 wpa_printf(MSG_DEBUG, "EAP-GPSK: Not enough memory to store "
275 "%d-octet ID_Peer", alen);
276 return;
277 }
278 data->id_peer_len = alen;
279 wpa_hexdump_ascii(MSG_DEBUG, "EAP-GPSK: ID_Peer",
280 data->id_peer, data->id_peer_len);
281 pos += alen;
282
283 if (end - pos < 2) {
284 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
285 "ID_Server length");
286 eap_gpsk_state(data, FAILURE);
287 return;
288 }
289 alen = WPA_GET_BE16(pos);
290 pos += 2;
291 if (end - pos < alen) {
292 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
293 "ID_Server");
294 eap_gpsk_state(data, FAILURE);
295 return;
296 }
297 if (alen != sm->cfg->server_id_len ||
298 os_memcmp(pos, sm->cfg->server_id, alen) != 0) {
299 wpa_printf(MSG_DEBUG, "EAP-GPSK: ID_Server in GPSK-1 and "
300 "GPSK-2 did not match");
301 eap_gpsk_state(data, FAILURE);
302 return;
303 }
304 pos += alen;
305
306 if (end - pos < EAP_GPSK_RAND_LEN) {
307 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
308 "RAND_Peer");
309 eap_gpsk_state(data, FAILURE);
310 return;
311 }
312 os_memcpy(data->rand_peer, pos, EAP_GPSK_RAND_LEN);
313 wpa_hexdump(MSG_DEBUG, "EAP-GPSK: RAND_Peer",
314 data->rand_peer, EAP_GPSK_RAND_LEN);
315 pos += EAP_GPSK_RAND_LEN;
316
317 if (end - pos < EAP_GPSK_RAND_LEN) {
318 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
319 "RAND_Server");
320 eap_gpsk_state(data, FAILURE);
321 return;
322 }
323 if (os_memcmp(data->rand_server, pos, EAP_GPSK_RAND_LEN) != 0) {
324 wpa_printf(MSG_DEBUG, "EAP-GPSK: RAND_Server in GPSK-1 and "
325 "GPSK-2 did not match");
326 wpa_hexdump(MSG_DEBUG, "EAP-GPSK: RAND_Server in GPSK-1",
327 data->rand_server, EAP_GPSK_RAND_LEN);
328 wpa_hexdump(MSG_DEBUG, "EAP-GPSK: RAND_Server in GPSK-2",
329 pos, EAP_GPSK_RAND_LEN);
330 eap_gpsk_state(data, FAILURE);
331 return;
332 }
333 pos += EAP_GPSK_RAND_LEN;
334
335 if (end - pos < 2) {
336 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
337 "CSuite_List length");
338 eap_gpsk_state(data, FAILURE);
339 return;
340 }
341 alen = WPA_GET_BE16(pos);
342 pos += 2;
343 if (end - pos < alen) {
344 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
345 "CSuite_List");
346 eap_gpsk_state(data, FAILURE);
347 return;
348 }
349 if (alen != data->csuite_count * sizeof(struct eap_gpsk_csuite) ||
350 os_memcmp(pos, data->csuite_list, alen) != 0) {
351 wpa_printf(MSG_DEBUG, "EAP-GPSK: CSuite_List in GPSK-1 and "
352 "GPSK-2 did not match");
353 eap_gpsk_state(data, FAILURE);
354 return;
355 }
356 pos += alen;
357
358 if (end - pos < (int) sizeof(*csuite)) {
359 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
360 "CSuite_Sel");
361 eap_gpsk_state(data, FAILURE);
362 return;
363 }
364 csuite = (const struct eap_gpsk_csuite *) pos;
365 for (i = 0; i < data->csuite_count; i++) {
366 if (os_memcmp(csuite, &data->csuite_list[i], sizeof(*csuite))
367 == 0)
368 break;
369 }
370 if (i == data->csuite_count) {
371 wpa_printf(MSG_DEBUG, "EAP-GPSK: Peer selected unsupported "
372 "ciphersuite %d:%d",
373 WPA_GET_BE32(csuite->vendor),
374 WPA_GET_BE16(csuite->specifier));
375 eap_gpsk_state(data, FAILURE);
376 return;
377 }
378 data->vendor = WPA_GET_BE32(csuite->vendor);
379 data->specifier = WPA_GET_BE16(csuite->specifier);
380 wpa_printf(MSG_DEBUG, "EAP-GPSK: CSuite_Sel %d:%d",
381 data->vendor, data->specifier);
382 pos += sizeof(*csuite);
383
384 if (end - pos < 2) {
385 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
386 "PD_Payload_1 length");
387 eap_gpsk_state(data, FAILURE);
388 return;
389 }
390 alen = WPA_GET_BE16(pos);
391 pos += 2;
392 if (end - pos < alen) {
393 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
394 "PD_Payload_1");
395 eap_gpsk_state(data, FAILURE);
396 return;
397 }
398 wpa_hexdump(MSG_DEBUG, "EAP-GPSK: PD_Payload_1", pos, alen);
399 pos += alen;
400
401 if (sm->user == NULL || sm->user->password == NULL) {
402 wpa_printf(MSG_INFO, "EAP-GPSK: No PSK/password configured "
403 "for the user");
404 eap_gpsk_state(data, FAILURE);
405 return;
406 }
407
408 if (eap_gpsk_derive_keys(sm->user->password, sm->user->password_len,
409 data->vendor, data->specifier,
410 data->rand_peer, data->rand_server,
411 data->id_peer, data->id_peer_len,
412 sm->cfg->server_id, sm->cfg->server_id_len,
413 data->msk, data->emsk,
414 data->sk, &data->sk_len,
415 data->pk, &data->pk_len) < 0) {
416 wpa_printf(MSG_DEBUG, "EAP-GPSK: Failed to derive keys");
417 eap_gpsk_state(data, FAILURE);
418 return;
419 }
420
421 if (eap_gpsk_derive_session_id(sm->user->password,
422 sm->user->password_len,
423 data->vendor, data->specifier,
424 data->rand_peer, data->rand_server,
425 data->id_peer, data->id_peer_len,
426 sm->cfg->server_id,
427 sm->cfg->server_id_len,
428 EAP_TYPE_GPSK,
429 data->session_id, &data->id_len) < 0) {
430 wpa_printf(MSG_DEBUG, "EAP-GPSK: Failed to derive Session-Id");
431 eap_gpsk_state(data, FAILURE);
432 return;
433 }
434 wpa_hexdump(MSG_DEBUG, "EAP-GPSK: Derived Session-Id",
435 data->session_id, data->id_len);
436
437 miclen = eap_gpsk_mic_len(data->vendor, data->specifier);
438 if (end - pos < (int) miclen) {
439 wpa_printf(MSG_DEBUG, "EAP-GPSK: Message too short for MIC "
440 "(left=%lu miclen=%lu)",
441 (unsigned long) (end - pos),
442 (unsigned long) miclen);
443 eap_gpsk_state(data, FAILURE);
444 return;
445 }
446 if (eap_gpsk_compute_mic(data->sk, data->sk_len, data->vendor,
447 data->specifier, payload, pos - payload, mic)
448 < 0) {
449 wpa_printf(MSG_DEBUG, "EAP-GPSK: Failed to compute MIC");
450 eap_gpsk_state(data, FAILURE);
451 return;
452 }
453 if (os_memcmp_const(mic, pos, miclen) != 0) {
454 wpa_printf(MSG_INFO, "EAP-GPSK: Incorrect MIC in GPSK-2");
455 wpa_hexdump(MSG_DEBUG, "EAP-GPSK: Received MIC", pos, miclen);
456 wpa_hexdump(MSG_DEBUG, "EAP-GPSK: Computed MIC", mic, miclen);
457 eap_gpsk_state(data, FAILURE);
458 return;
459 }
460 pos += miclen;
461
462 if (pos != end) {
463 wpa_printf(MSG_DEBUG, "EAP-GPSK: Ignored %lu bytes of extra "
464 "data in the end of GPSK-2",
465 (unsigned long) (end - pos));
466 }
467
468 eap_gpsk_state(data, GPSK_3);
469 }
470
471
eap_gpsk_process_gpsk_4(struct eap_sm * sm,struct eap_gpsk_data * data,const u8 * payload,size_t payloadlen)472 static void eap_gpsk_process_gpsk_4(struct eap_sm *sm,
473 struct eap_gpsk_data *data,
474 const u8 *payload, size_t payloadlen)
475 {
476 const u8 *pos, *end;
477 u16 alen;
478 size_t miclen;
479 u8 mic[EAP_GPSK_MAX_MIC_LEN];
480
481 if (data->state != GPSK_3)
482 return;
483
484 wpa_printf(MSG_DEBUG, "EAP-GPSK: Received Response/GPSK-4");
485
486 pos = payload;
487 end = payload + payloadlen;
488
489 if (end - pos < 2) {
490 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
491 "PD_Payload_1 length");
492 eap_gpsk_state(data, FAILURE);
493 return;
494 }
495 alen = WPA_GET_BE16(pos);
496 pos += 2;
497 if (end - pos < alen) {
498 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
499 "PD_Payload_1");
500 eap_gpsk_state(data, FAILURE);
501 return;
502 }
503 wpa_hexdump(MSG_DEBUG, "EAP-GPSK: PD_Payload_1", pos, alen);
504 pos += alen;
505
506 miclen = eap_gpsk_mic_len(data->vendor, data->specifier);
507 if (end - pos < (int) miclen) {
508 wpa_printf(MSG_DEBUG, "EAP-GPSK: Message too short for MIC "
509 "(left=%lu miclen=%lu)",
510 (unsigned long) (end - pos),
511 (unsigned long) miclen);
512 eap_gpsk_state(data, FAILURE);
513 return;
514 }
515 if (eap_gpsk_compute_mic(data->sk, data->sk_len, data->vendor,
516 data->specifier, payload, pos - payload, mic)
517 < 0) {
518 wpa_printf(MSG_DEBUG, "EAP-GPSK: Failed to compute MIC");
519 eap_gpsk_state(data, FAILURE);
520 return;
521 }
522 if (os_memcmp_const(mic, pos, miclen) != 0) {
523 wpa_printf(MSG_INFO, "EAP-GPSK: Incorrect MIC in GPSK-4");
524 wpa_hexdump(MSG_DEBUG, "EAP-GPSK: Received MIC", pos, miclen);
525 wpa_hexdump(MSG_DEBUG, "EAP-GPSK: Computed MIC", mic, miclen);
526 eap_gpsk_state(data, FAILURE);
527 return;
528 }
529 pos += miclen;
530
531 if (pos != end) {
532 wpa_printf(MSG_DEBUG, "EAP-GPSK: Ignored %lu bytes of extra "
533 "data in the end of GPSK-4",
534 (unsigned long) (end - pos));
535 }
536
537 eap_gpsk_state(data, SUCCESS);
538 }
539
540
eap_gpsk_process(struct eap_sm * sm,void * priv,struct wpabuf * respData)541 static void eap_gpsk_process(struct eap_sm *sm, void *priv,
542 struct wpabuf *respData)
543 {
544 struct eap_gpsk_data *data = priv;
545 const u8 *pos;
546 size_t len;
547
548 pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_GPSK, respData, &len);
549 if (pos == NULL || len < 1)
550 return;
551
552 switch (*pos) {
553 case EAP_GPSK_OPCODE_GPSK_2:
554 eap_gpsk_process_gpsk_2(sm, data, pos + 1, len - 1);
555 break;
556 case EAP_GPSK_OPCODE_GPSK_4:
557 eap_gpsk_process_gpsk_4(sm, data, pos + 1, len - 1);
558 break;
559 }
560 }
561
562
eap_gpsk_isDone(struct eap_sm * sm,void * priv)563 static bool eap_gpsk_isDone(struct eap_sm *sm, void *priv)
564 {
565 struct eap_gpsk_data *data = priv;
566 return data->state == SUCCESS || data->state == FAILURE;
567 }
568
569
eap_gpsk_getKey(struct eap_sm * sm,void * priv,size_t * len)570 static u8 * eap_gpsk_getKey(struct eap_sm *sm, void *priv, size_t *len)
571 {
572 struct eap_gpsk_data *data = priv;
573 u8 *key;
574
575 if (data->state != SUCCESS)
576 return NULL;
577
578 key = os_memdup(data->msk, EAP_MSK_LEN);
579 if (key == NULL)
580 return NULL;
581 *len = EAP_MSK_LEN;
582
583 return key;
584 }
585
586
eap_gpsk_get_emsk(struct eap_sm * sm,void * priv,size_t * len)587 static u8 * eap_gpsk_get_emsk(struct eap_sm *sm, void *priv, size_t *len)
588 {
589 struct eap_gpsk_data *data = priv;
590 u8 *key;
591
592 if (data->state != SUCCESS)
593 return NULL;
594
595 key = os_memdup(data->emsk, EAP_EMSK_LEN);
596 if (key == NULL)
597 return NULL;
598 *len = EAP_EMSK_LEN;
599
600 return key;
601 }
602
603
eap_gpsk_isSuccess(struct eap_sm * sm,void * priv)604 static bool eap_gpsk_isSuccess(struct eap_sm *sm, void *priv)
605 {
606 struct eap_gpsk_data *data = priv;
607 return data->state == SUCCESS;
608 }
609
610
eap_gpsk_get_session_id(struct eap_sm * sm,void * priv,size_t * len)611 static u8 * eap_gpsk_get_session_id(struct eap_sm *sm, void *priv, size_t *len)
612 {
613 struct eap_gpsk_data *data = priv;
614 u8 *sid;
615
616 if (data->state != SUCCESS)
617 return NULL;
618
619 sid = os_memdup(data->session_id, data->id_len);
620 if (sid == NULL)
621 return NULL;
622 *len = data->id_len;
623
624 return sid;
625 }
626
627
eap_server_gpsk_register(void)628 int eap_server_gpsk_register(void)
629 {
630 struct eap_method *eap;
631
632 eap = eap_server_method_alloc(EAP_SERVER_METHOD_INTERFACE_VERSION,
633 EAP_VENDOR_IETF, EAP_TYPE_GPSK, "GPSK");
634 if (eap == NULL)
635 return -1;
636
637 eap->init = eap_gpsk_init;
638 eap->reset = eap_gpsk_reset;
639 eap->buildReq = eap_gpsk_buildReq;
640 eap->check = eap_gpsk_check;
641 eap->process = eap_gpsk_process;
642 eap->isDone = eap_gpsk_isDone;
643 eap->getKey = eap_gpsk_getKey;
644 eap->isSuccess = eap_gpsk_isSuccess;
645 eap->get_emsk = eap_gpsk_get_emsk;
646 eap->getSessionId = eap_gpsk_get_session_id;
647
648 return eap_server_method_register(eap);
649 }
650