Line data Source code
1 : /*
2 : * hostapd / EAP-PAX (RFC 4746) server
3 : * Copyright (c) 2005-2007, 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_pax_common.h"
15 :
16 : /*
17 : * Note: only PAX_STD subprotocol is currently supported
18 : *
19 : * TODO: Add support with PAX_SEC with the mandatory to implement ciphersuite
20 : * (HMAC_SHA1_128, IANA DH Group 14 (2048 bits), RSA-PKCS1-V1_5) and
21 : * recommended ciphersuite (HMAC_SHA256_128, IANA DH Group 15 (3072 bits),
22 : * RSAES-OAEP).
23 : */
24 :
25 : struct eap_pax_data {
26 : enum { PAX_STD_1, PAX_STD_3, SUCCESS, FAILURE } state;
27 : u8 mac_id;
28 : union {
29 : u8 e[2 * EAP_PAX_RAND_LEN];
30 : struct {
31 : u8 x[EAP_PAX_RAND_LEN]; /* server rand */
32 : u8 y[EAP_PAX_RAND_LEN]; /* client rand */
33 : } r;
34 : } rand;
35 : u8 ak[EAP_PAX_AK_LEN];
36 : u8 mk[EAP_PAX_MK_LEN];
37 : u8 ck[EAP_PAX_CK_LEN];
38 : u8 ick[EAP_PAX_ICK_LEN];
39 : int keys_set;
40 : char *cid;
41 : size_t cid_len;
42 : };
43 :
44 :
45 14 : static void * eap_pax_init(struct eap_sm *sm)
46 : {
47 : struct eap_pax_data *data;
48 :
49 14 : data = os_zalloc(sizeof(*data));
50 14 : if (data == NULL)
51 0 : return NULL;
52 14 : data->state = PAX_STD_1;
53 : /*
54 : * TODO: make this configurable once EAP_PAX_HMAC_SHA256_128 is
55 : * supported
56 : */
57 14 : data->mac_id = EAP_PAX_MAC_HMAC_SHA1_128;
58 :
59 14 : return data;
60 : }
61 :
62 :
63 14 : static void eap_pax_reset(struct eap_sm *sm, void *priv)
64 : {
65 14 : struct eap_pax_data *data = priv;
66 14 : os_free(data->cid);
67 14 : os_free(data);
68 14 : }
69 :
70 :
71 14 : static struct wpabuf * eap_pax_build_std_1(struct eap_sm *sm,
72 : struct eap_pax_data *data, u8 id)
73 : {
74 : struct wpabuf *req;
75 : struct eap_pax_hdr *pax;
76 : u8 *pos;
77 :
78 14 : wpa_printf(MSG_DEBUG, "EAP-PAX: PAX_STD-1 (sending)");
79 :
80 14 : if (random_get_bytes(data->rand.r.x, EAP_PAX_RAND_LEN)) {
81 0 : wpa_printf(MSG_ERROR, "EAP-PAX: Failed to get random data");
82 0 : data->state = FAILURE;
83 0 : return NULL;
84 : }
85 :
86 14 : req = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_PAX,
87 : sizeof(*pax) + 2 + EAP_PAX_RAND_LEN +
88 : EAP_PAX_ICV_LEN, EAP_CODE_REQUEST, id);
89 14 : if (req == NULL) {
90 0 : wpa_printf(MSG_ERROR, "EAP-PAX: Failed to allocate memory "
91 : "request");
92 0 : data->state = FAILURE;
93 0 : return NULL;
94 : }
95 :
96 14 : pax = wpabuf_put(req, sizeof(*pax));
97 14 : pax->op_code = EAP_PAX_OP_STD_1;
98 14 : pax->flags = 0;
99 14 : pax->mac_id = data->mac_id;
100 14 : pax->dh_group_id = EAP_PAX_DH_GROUP_NONE;
101 14 : pax->public_key_id = EAP_PAX_PUBLIC_KEY_NONE;
102 :
103 14 : wpabuf_put_be16(req, EAP_PAX_RAND_LEN);
104 14 : wpabuf_put_data(req, data->rand.r.x, EAP_PAX_RAND_LEN);
105 14 : wpa_hexdump(MSG_MSGDUMP, "EAP-PAX: A = X (server rand)",
106 14 : data->rand.r.x, EAP_PAX_RAND_LEN);
107 :
108 14 : pos = wpabuf_put(req, EAP_PAX_MAC_LEN);
109 28 : eap_pax_mac(data->mac_id, (u8 *) "", 0,
110 28 : wpabuf_mhead(req), wpabuf_len(req) - EAP_PAX_ICV_LEN,
111 : NULL, 0, NULL, 0, pos);
112 14 : wpa_hexdump(MSG_MSGDUMP, "EAP-PAX: ICV", pos, EAP_PAX_ICV_LEN);
113 :
114 14 : return req;
115 : }
116 :
117 :
118 13 : static struct wpabuf * eap_pax_build_std_3(struct eap_sm *sm,
119 : struct eap_pax_data *data, u8 id)
120 : {
121 : struct wpabuf *req;
122 : struct eap_pax_hdr *pax;
123 : u8 *pos;
124 :
125 13 : wpa_printf(MSG_DEBUG, "EAP-PAX: PAX_STD-3 (sending)");
126 :
127 13 : req = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_PAX,
128 : sizeof(*pax) + 2 + EAP_PAX_MAC_LEN +
129 : EAP_PAX_ICV_LEN, EAP_CODE_REQUEST, id);
130 13 : if (req == NULL) {
131 0 : wpa_printf(MSG_ERROR, "EAP-PAX: Failed to allocate memory "
132 : "request");
133 0 : data->state = FAILURE;
134 0 : return NULL;
135 : }
136 :
137 13 : pax = wpabuf_put(req, sizeof(*pax));
138 13 : pax->op_code = EAP_PAX_OP_STD_3;
139 13 : pax->flags = 0;
140 13 : pax->mac_id = data->mac_id;
141 13 : pax->dh_group_id = EAP_PAX_DH_GROUP_NONE;
142 13 : pax->public_key_id = EAP_PAX_PUBLIC_KEY_NONE;
143 :
144 13 : wpabuf_put_be16(req, EAP_PAX_MAC_LEN);
145 13 : pos = wpabuf_put(req, EAP_PAX_MAC_LEN);
146 26 : eap_pax_mac(data->mac_id, data->ck, EAP_PAX_CK_LEN,
147 13 : data->rand.r.y, EAP_PAX_RAND_LEN,
148 13 : (u8 *) data->cid, data->cid_len, NULL, 0, pos);
149 13 : wpa_hexdump(MSG_MSGDUMP, "EAP-PAX: MAC_CK(B, CID)",
150 : pos, EAP_PAX_MAC_LEN);
151 13 : pos += EAP_PAX_MAC_LEN;
152 :
153 : /* Optional ADE could be added here, if needed */
154 :
155 13 : pos = wpabuf_put(req, EAP_PAX_MAC_LEN);
156 26 : eap_pax_mac(data->mac_id, data->ick, EAP_PAX_ICK_LEN,
157 26 : wpabuf_mhead(req), wpabuf_len(req) - EAP_PAX_ICV_LEN,
158 : NULL, 0, NULL, 0, pos);
159 13 : wpa_hexdump(MSG_MSGDUMP, "EAP-PAX: ICV", pos, EAP_PAX_ICV_LEN);
160 :
161 13 : return req;
162 : }
163 :
164 :
165 27 : static struct wpabuf * eap_pax_buildReq(struct eap_sm *sm, void *priv, u8 id)
166 : {
167 27 : struct eap_pax_data *data = priv;
168 :
169 27 : switch (data->state) {
170 : case PAX_STD_1:
171 14 : return eap_pax_build_std_1(sm, data, id);
172 : case PAX_STD_3:
173 13 : return eap_pax_build_std_3(sm, data, id);
174 : default:
175 0 : wpa_printf(MSG_DEBUG, "EAP-PAX: Unknown state %d in buildReq",
176 0 : data->state);
177 0 : break;
178 : }
179 0 : return NULL;
180 : }
181 :
182 :
183 27 : static Boolean eap_pax_check(struct eap_sm *sm, void *priv,
184 : struct wpabuf *respData)
185 : {
186 27 : struct eap_pax_data *data = priv;
187 : struct eap_pax_hdr *resp;
188 : const u8 *pos;
189 : size_t len, mlen;
190 : u8 icvbuf[EAP_PAX_ICV_LEN], *icv;
191 :
192 27 : pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_PAX, respData, &len);
193 27 : if (pos == NULL || len < sizeof(*resp)) {
194 0 : wpa_printf(MSG_INFO, "EAP-PAX: Invalid frame");
195 0 : return TRUE;
196 : }
197 :
198 27 : mlen = sizeof(struct eap_hdr) + 1 + len;
199 27 : resp = (struct eap_pax_hdr *) pos;
200 :
201 135 : wpa_printf(MSG_DEBUG, "EAP-PAX: received frame: op_code 0x%x "
202 : "flags 0x%x mac_id 0x%x dh_group_id 0x%x "
203 : "public_key_id 0x%x",
204 108 : resp->op_code, resp->flags, resp->mac_id, resp->dh_group_id,
205 27 : resp->public_key_id);
206 27 : wpa_hexdump(MSG_MSGDUMP, "EAP-PAX: received payload",
207 27 : (u8 *) (resp + 1), len - sizeof(*resp) - EAP_PAX_ICV_LEN);
208 :
209 41 : if (data->state == PAX_STD_1 &&
210 14 : resp->op_code != EAP_PAX_OP_STD_2) {
211 0 : wpa_printf(MSG_DEBUG, "EAP-PAX: Expected PAX_STD-2 - "
212 0 : "ignore op %d", resp->op_code);
213 0 : return TRUE;
214 : }
215 :
216 40 : if (data->state == PAX_STD_3 &&
217 13 : resp->op_code != EAP_PAX_OP_ACK) {
218 0 : wpa_printf(MSG_DEBUG, "EAP-PAX: Expected PAX-ACK - "
219 0 : "ignore op %d", resp->op_code);
220 0 : return TRUE;
221 : }
222 :
223 40 : if (resp->op_code != EAP_PAX_OP_STD_2 &&
224 13 : resp->op_code != EAP_PAX_OP_ACK) {
225 0 : wpa_printf(MSG_DEBUG, "EAP-PAX: Unknown op_code 0x%x",
226 0 : resp->op_code);
227 : }
228 :
229 27 : if (data->mac_id != resp->mac_id) {
230 0 : wpa_printf(MSG_DEBUG, "EAP-PAX: Expected MAC ID 0x%x, "
231 0 : "received 0x%x", data->mac_id, resp->mac_id);
232 0 : return TRUE;
233 : }
234 :
235 27 : if (resp->dh_group_id != EAP_PAX_DH_GROUP_NONE) {
236 0 : wpa_printf(MSG_INFO, "EAP-PAX: Expected DH Group ID 0x%x, "
237 : "received 0x%x", EAP_PAX_DH_GROUP_NONE,
238 0 : resp->dh_group_id);
239 0 : return TRUE;
240 : }
241 :
242 27 : if (resp->public_key_id != EAP_PAX_PUBLIC_KEY_NONE) {
243 0 : wpa_printf(MSG_INFO, "EAP-PAX: Expected Public Key ID 0x%x, "
244 : "received 0x%x", EAP_PAX_PUBLIC_KEY_NONE,
245 0 : resp->public_key_id);
246 0 : return TRUE;
247 : }
248 :
249 27 : if (resp->flags & EAP_PAX_FLAGS_MF) {
250 : /* TODO: add support for reassembling fragments */
251 0 : wpa_printf(MSG_INFO, "EAP-PAX: fragmentation not supported");
252 0 : return TRUE;
253 : }
254 :
255 27 : if (resp->flags & EAP_PAX_FLAGS_CE) {
256 0 : wpa_printf(MSG_INFO, "EAP-PAX: Unexpected CE flag");
257 0 : return TRUE;
258 : }
259 :
260 27 : if (data->keys_set) {
261 13 : if (len - sizeof(*resp) < EAP_PAX_ICV_LEN) {
262 0 : wpa_printf(MSG_INFO, "EAP-PAX: No ICV in the packet");
263 0 : return TRUE;
264 : }
265 13 : icv = wpabuf_mhead_u8(respData) + mlen - EAP_PAX_ICV_LEN;
266 13 : wpa_hexdump(MSG_MSGDUMP, "EAP-PAX: ICV", icv, EAP_PAX_ICV_LEN);
267 26 : eap_pax_mac(data->mac_id, data->ick, EAP_PAX_ICK_LEN,
268 13 : wpabuf_mhead(respData),
269 13 : wpabuf_len(respData) - EAP_PAX_ICV_LEN,
270 : NULL, 0, NULL, 0, icvbuf);
271 13 : if (os_memcmp(icvbuf, icv, EAP_PAX_ICV_LEN) != 0) {
272 0 : wpa_printf(MSG_INFO, "EAP-PAX: Invalid ICV");
273 0 : wpa_hexdump(MSG_MSGDUMP, "EAP-PAX: Expected ICV",
274 : icvbuf, EAP_PAX_ICV_LEN);
275 0 : return TRUE;
276 : }
277 : }
278 :
279 27 : return FALSE;
280 : }
281 :
282 :
283 14 : static void eap_pax_process_std_2(struct eap_sm *sm,
284 : struct eap_pax_data *data,
285 : struct wpabuf *respData)
286 : {
287 : struct eap_pax_hdr *resp;
288 : u8 mac[EAP_PAX_MAC_LEN], icvbuf[EAP_PAX_ICV_LEN];
289 : const u8 *pos;
290 : size_t len, left;
291 : int i;
292 :
293 14 : if (data->state != PAX_STD_1)
294 1 : return;
295 :
296 14 : wpa_printf(MSG_DEBUG, "EAP-PAX: Received PAX_STD-2");
297 :
298 14 : pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_PAX, respData, &len);
299 14 : if (pos == NULL || len < sizeof(*resp) + EAP_PAX_ICV_LEN)
300 0 : return;
301 :
302 14 : resp = (struct eap_pax_hdr *) pos;
303 14 : pos = (u8 *) (resp + 1);
304 14 : left = len - sizeof(*resp);
305 :
306 28 : if (left < 2 + EAP_PAX_RAND_LEN ||
307 14 : WPA_GET_BE16(pos) != EAP_PAX_RAND_LEN) {
308 0 : wpa_printf(MSG_INFO, "EAP-PAX: Too short PAX_STD-2 (B)");
309 0 : return;
310 : }
311 14 : pos += 2;
312 14 : left -= 2;
313 14 : os_memcpy(data->rand.r.y, pos, EAP_PAX_RAND_LEN);
314 14 : wpa_hexdump(MSG_MSGDUMP, "EAP-PAX: Y (client rand)",
315 14 : data->rand.r.y, EAP_PAX_RAND_LEN);
316 14 : pos += EAP_PAX_RAND_LEN;
317 14 : left -= EAP_PAX_RAND_LEN;
318 :
319 14 : if (left < 2 || (size_t) 2 + WPA_GET_BE16(pos) > left) {
320 0 : wpa_printf(MSG_INFO, "EAP-PAX: Too short PAX_STD-2 (CID)");
321 0 : return;
322 : }
323 14 : data->cid_len = WPA_GET_BE16(pos);
324 14 : os_free(data->cid);
325 14 : data->cid = os_malloc(data->cid_len);
326 14 : if (data->cid == NULL) {
327 0 : wpa_printf(MSG_INFO, "EAP-PAX: Failed to allocate memory for "
328 : "CID");
329 0 : return;
330 : }
331 14 : os_memcpy(data->cid, pos + 2, data->cid_len);
332 14 : pos += 2 + data->cid_len;
333 14 : left -= 2 + data->cid_len;
334 28 : wpa_hexdump_ascii(MSG_MSGDUMP, "EAP-PAX: CID",
335 14 : (u8 *) data->cid, data->cid_len);
336 :
337 28 : if (left < 2 + EAP_PAX_MAC_LEN ||
338 14 : WPA_GET_BE16(pos) != EAP_PAX_MAC_LEN) {
339 0 : wpa_printf(MSG_INFO, "EAP-PAX: Too short PAX_STD-2 (MAC_CK)");
340 0 : return;
341 : }
342 14 : pos += 2;
343 14 : left -= 2;
344 14 : wpa_hexdump(MSG_MSGDUMP, "EAP-PAX: MAC_CK(A, B, CID)",
345 : pos, EAP_PAX_MAC_LEN);
346 :
347 14 : if (eap_user_get(sm, (u8 *) data->cid, data->cid_len, 0) < 0) {
348 0 : wpa_hexdump_ascii(MSG_DEBUG, "EAP-PAX: unknown CID",
349 0 : (u8 *) data->cid, data->cid_len);
350 0 : data->state = FAILURE;
351 0 : return;
352 : }
353 :
354 28 : for (i = 0;
355 14 : i < EAP_MAX_METHODS &&
356 28 : (sm->user->methods[i].vendor != EAP_VENDOR_IETF ||
357 14 : sm->user->methods[i].method != EAP_TYPE_NONE);
358 0 : i++) {
359 28 : if (sm->user->methods[i].vendor == EAP_VENDOR_IETF &&
360 14 : sm->user->methods[i].method == EAP_TYPE_PAX)
361 14 : break;
362 : }
363 :
364 28 : if (i >= EAP_MAX_METHODS ||
365 28 : sm->user->methods[i].vendor != EAP_VENDOR_IETF ||
366 14 : sm->user->methods[i].method != EAP_TYPE_PAX) {
367 0 : wpa_hexdump_ascii(MSG_DEBUG,
368 : "EAP-PAX: EAP-PAX not enabled for CID",
369 0 : (u8 *) data->cid, data->cid_len);
370 0 : data->state = FAILURE;
371 0 : return;
372 : }
373 :
374 28 : if (sm->user->password == NULL ||
375 14 : sm->user->password_len != EAP_PAX_AK_LEN) {
376 0 : wpa_hexdump_ascii(MSG_DEBUG, "EAP-PAX: invalid password in "
377 : "user database for CID",
378 0 : (u8 *) data->cid, data->cid_len);
379 0 : data->state = FAILURE;
380 0 : return;
381 : }
382 14 : os_memcpy(data->ak, sm->user->password, EAP_PAX_AK_LEN);
383 :
384 14 : if (eap_pax_initial_key_derivation(data->mac_id, data->ak,
385 14 : data->rand.e, data->mk, data->ck,
386 14 : data->ick) < 0) {
387 0 : wpa_printf(MSG_INFO, "EAP-PAX: Failed to complete initial "
388 : "key derivation");
389 0 : data->state = FAILURE;
390 0 : return;
391 : }
392 14 : data->keys_set = 1;
393 :
394 28 : eap_pax_mac(data->mac_id, data->ck, EAP_PAX_CK_LEN,
395 14 : data->rand.r.x, EAP_PAX_RAND_LEN,
396 14 : data->rand.r.y, EAP_PAX_RAND_LEN,
397 14 : (u8 *) data->cid, data->cid_len, mac);
398 14 : if (os_memcmp(mac, pos, EAP_PAX_MAC_LEN) != 0) {
399 1 : wpa_printf(MSG_INFO, "EAP-PAX: Invalid MAC_CK(A, B, CID) in "
400 : "PAX_STD-2");
401 1 : wpa_hexdump(MSG_MSGDUMP, "EAP-PAX: Expected MAC_CK(A, B, CID)",
402 : mac, EAP_PAX_MAC_LEN);
403 1 : data->state = FAILURE;
404 1 : return;
405 : }
406 :
407 13 : pos += EAP_PAX_MAC_LEN;
408 13 : left -= EAP_PAX_MAC_LEN;
409 :
410 13 : if (left < EAP_PAX_ICV_LEN) {
411 0 : wpa_printf(MSG_INFO, "EAP-PAX: Too short ICV (%lu) in "
412 : "PAX_STD-2", (unsigned long) left);
413 0 : return;
414 : }
415 13 : wpa_hexdump(MSG_MSGDUMP, "EAP-PAX: ICV", pos, EAP_PAX_ICV_LEN);
416 26 : eap_pax_mac(data->mac_id, data->ick, EAP_PAX_ICK_LEN,
417 13 : wpabuf_head(respData),
418 13 : wpabuf_len(respData) - EAP_PAX_ICV_LEN, NULL, 0, NULL, 0,
419 : icvbuf);
420 13 : if (os_memcmp(icvbuf, pos, EAP_PAX_ICV_LEN) != 0) {
421 0 : wpa_printf(MSG_INFO, "EAP-PAX: Invalid ICV in PAX_STD-2");
422 0 : wpa_hexdump(MSG_MSGDUMP, "EAP-PAX: Expected ICV",
423 : icvbuf, EAP_PAX_ICV_LEN);
424 0 : return;
425 : }
426 13 : pos += EAP_PAX_ICV_LEN;
427 13 : left -= EAP_PAX_ICV_LEN;
428 :
429 13 : if (left > 0) {
430 0 : wpa_hexdump(MSG_MSGDUMP, "EAP-PAX: ignored extra payload",
431 : pos, left);
432 : }
433 :
434 13 : data->state = PAX_STD_3;
435 : }
436 :
437 :
438 13 : static void eap_pax_process_ack(struct eap_sm *sm,
439 : struct eap_pax_data *data,
440 : struct wpabuf *respData)
441 : {
442 13 : if (data->state != PAX_STD_3)
443 13 : return;
444 :
445 13 : wpa_printf(MSG_DEBUG, "EAP-PAX: Received PAX-ACK - authentication "
446 : "completed successfully");
447 13 : data->state = SUCCESS;
448 : }
449 :
450 :
451 27 : static void eap_pax_process(struct eap_sm *sm, void *priv,
452 : struct wpabuf *respData)
453 : {
454 27 : struct eap_pax_data *data = priv;
455 : struct eap_pax_hdr *resp;
456 : const u8 *pos;
457 : size_t len;
458 :
459 27 : if (sm->user == NULL || sm->user->password == NULL) {
460 0 : wpa_printf(MSG_INFO, "EAP-PAX: Plaintext password not "
461 : "configured");
462 0 : data->state = FAILURE;
463 0 : return;
464 : }
465 :
466 27 : pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_PAX, respData, &len);
467 27 : if (pos == NULL || len < sizeof(*resp))
468 0 : return;
469 :
470 27 : resp = (struct eap_pax_hdr *) pos;
471 :
472 27 : switch (resp->op_code) {
473 : case EAP_PAX_OP_STD_2:
474 14 : eap_pax_process_std_2(sm, data, respData);
475 14 : break;
476 : case EAP_PAX_OP_ACK:
477 13 : eap_pax_process_ack(sm, data, respData);
478 13 : break;
479 : }
480 : }
481 :
482 :
483 28 : static Boolean eap_pax_isDone(struct eap_sm *sm, void *priv)
484 : {
485 28 : struct eap_pax_data *data = priv;
486 28 : return data->state == SUCCESS || data->state == FAILURE;
487 : }
488 :
489 :
490 14 : static u8 * eap_pax_getKey(struct eap_sm *sm, void *priv, size_t *len)
491 : {
492 14 : struct eap_pax_data *data = priv;
493 : u8 *key;
494 :
495 14 : if (data->state != SUCCESS)
496 1 : return NULL;
497 :
498 13 : key = os_malloc(EAP_MSK_LEN);
499 13 : if (key == NULL)
500 0 : return NULL;
501 :
502 13 : *len = EAP_MSK_LEN;
503 13 : eap_pax_kdf(data->mac_id, data->mk, EAP_PAX_MK_LEN,
504 13 : "Master Session Key", data->rand.e, 2 * EAP_PAX_RAND_LEN,
505 : EAP_MSK_LEN, key);
506 :
507 13 : return key;
508 : }
509 :
510 :
511 0 : static u8 * eap_pax_get_emsk(struct eap_sm *sm, void *priv, size_t *len)
512 : {
513 0 : struct eap_pax_data *data = priv;
514 : u8 *key;
515 :
516 0 : if (data->state != SUCCESS)
517 0 : return NULL;
518 :
519 0 : key = os_malloc(EAP_EMSK_LEN);
520 0 : if (key == NULL)
521 0 : return NULL;
522 :
523 0 : *len = EAP_EMSK_LEN;
524 0 : eap_pax_kdf(data->mac_id, data->mk, EAP_PAX_MK_LEN,
525 : "Extended Master Session Key",
526 0 : data->rand.e, 2 * EAP_PAX_RAND_LEN,
527 : EAP_EMSK_LEN, key);
528 :
529 0 : return key;
530 : }
531 :
532 :
533 15 : static Boolean eap_pax_isSuccess(struct eap_sm *sm, void *priv)
534 : {
535 15 : struct eap_pax_data *data = priv;
536 15 : return data->state == SUCCESS;
537 : }
538 :
539 :
540 2 : int eap_server_pax_register(void)
541 : {
542 : struct eap_method *eap;
543 : int ret;
544 :
545 2 : eap = eap_server_method_alloc(EAP_SERVER_METHOD_INTERFACE_VERSION,
546 : EAP_VENDOR_IETF, EAP_TYPE_PAX, "PAX");
547 2 : if (eap == NULL)
548 0 : return -1;
549 :
550 2 : eap->init = eap_pax_init;
551 2 : eap->reset = eap_pax_reset;
552 2 : eap->buildReq = eap_pax_buildReq;
553 2 : eap->check = eap_pax_check;
554 2 : eap->process = eap_pax_process;
555 2 : eap->isDone = eap_pax_isDone;
556 2 : eap->getKey = eap_pax_getKey;
557 2 : eap->isSuccess = eap_pax_isSuccess;
558 2 : eap->get_emsk = eap_pax_get_emsk;
559 :
560 2 : ret = eap_server_method_register(eap);
561 2 : if (ret)
562 0 : eap_server_method_free(eap);
563 2 : return ret;
564 : }
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