Line data Source code
1 : /*
2 : * hostapd / EAP-MSCHAPv2 (draft-kamath-pppext-eap-mschapv2-00.txt) server
3 : * Copyright (c) 2004-2007, 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/ms_funcs.h"
13 : #include "crypto/random.h"
14 : #include "eap_i.h"
15 :
16 :
17 : struct eap_mschapv2_hdr {
18 : u8 op_code; /* MSCHAPV2_OP_* */
19 : u8 mschapv2_id; /* must be changed for challenges, but not for
20 : * success/failure */
21 : u8 ms_length[2]; /* Note: misaligned; length - 5 */
22 : /* followed by data */
23 : } STRUCT_PACKED;
24 :
25 : #define MSCHAPV2_OP_CHALLENGE 1
26 : #define MSCHAPV2_OP_RESPONSE 2
27 : #define MSCHAPV2_OP_SUCCESS 3
28 : #define MSCHAPV2_OP_FAILURE 4
29 : #define MSCHAPV2_OP_CHANGE_PASSWORD 7
30 :
31 : #define MSCHAPV2_RESP_LEN 49
32 :
33 : #define ERROR_RESTRICTED_LOGON_HOURS 646
34 : #define ERROR_ACCT_DISABLED 647
35 : #define ERROR_PASSWD_EXPIRED 648
36 : #define ERROR_NO_DIALIN_PERMISSION 649
37 : #define ERROR_AUTHENTICATION_FAILURE 691
38 : #define ERROR_CHANGING_PASSWORD 709
39 :
40 : #define PASSWD_CHANGE_CHAL_LEN 16
41 : #define MSCHAPV2_KEY_LEN 16
42 :
43 :
44 : #define CHALLENGE_LEN 16
45 :
46 : struct eap_mschapv2_data {
47 : u8 auth_challenge[CHALLENGE_LEN];
48 : int auth_challenge_from_tls;
49 : u8 *peer_challenge;
50 : u8 auth_response[20];
51 : enum { CHALLENGE, SUCCESS_REQ, FAILURE_REQ, SUCCESS, FAILURE } state;
52 : u8 resp_mschapv2_id;
53 : u8 master_key[16];
54 : int master_key_valid;
55 : };
56 :
57 :
58 57 : static void * eap_mschapv2_init(struct eap_sm *sm)
59 : {
60 : struct eap_mschapv2_data *data;
61 :
62 57 : data = os_zalloc(sizeof(*data));
63 57 : if (data == NULL)
64 0 : return NULL;
65 57 : data->state = CHALLENGE;
66 :
67 57 : if (sm->auth_challenge) {
68 4 : os_memcpy(data->auth_challenge, sm->auth_challenge,
69 : CHALLENGE_LEN);
70 4 : data->auth_challenge_from_tls = 1;
71 : }
72 :
73 57 : if (sm->peer_challenge) {
74 4 : data->peer_challenge = os_malloc(CHALLENGE_LEN);
75 4 : if (data->peer_challenge == NULL) {
76 0 : os_free(data);
77 0 : return NULL;
78 : }
79 4 : os_memcpy(data->peer_challenge, sm->peer_challenge,
80 : CHALLENGE_LEN);
81 : }
82 :
83 57 : return data;
84 : }
85 :
86 :
87 57 : static void eap_mschapv2_reset(struct eap_sm *sm, void *priv)
88 : {
89 57 : struct eap_mschapv2_data *data = priv;
90 57 : if (data == NULL)
91 57 : return;
92 :
93 57 : os_free(data->peer_challenge);
94 57 : os_free(data);
95 : }
96 :
97 :
98 57 : static struct wpabuf * eap_mschapv2_build_challenge(
99 : struct eap_sm *sm, struct eap_mschapv2_data *data, u8 id)
100 : {
101 : struct wpabuf *req;
102 : struct eap_mschapv2_hdr *ms;
103 : size_t ms_len;
104 :
105 110 : if (!data->auth_challenge_from_tls &&
106 53 : random_get_bytes(data->auth_challenge, CHALLENGE_LEN)) {
107 0 : wpa_printf(MSG_ERROR, "EAP-MSCHAPV2: Failed to get random "
108 : "data");
109 0 : data->state = FAILURE;
110 0 : return NULL;
111 : }
112 :
113 57 : ms_len = sizeof(*ms) + 1 + CHALLENGE_LEN + sm->server_id_len;
114 57 : req = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2, ms_len,
115 : EAP_CODE_REQUEST, id);
116 57 : if (req == NULL) {
117 0 : wpa_printf(MSG_ERROR, "EAP-MSCHAPV2: Failed to allocate memory"
118 : " for request");
119 0 : data->state = FAILURE;
120 0 : return NULL;
121 : }
122 :
123 57 : ms = wpabuf_put(req, sizeof(*ms));
124 57 : ms->op_code = MSCHAPV2_OP_CHALLENGE;
125 57 : ms->mschapv2_id = id;
126 57 : WPA_PUT_BE16(ms->ms_length, ms_len);
127 :
128 57 : wpabuf_put_u8(req, CHALLENGE_LEN);
129 57 : if (!data->auth_challenge_from_tls)
130 53 : wpabuf_put_data(req, data->auth_challenge, CHALLENGE_LEN);
131 : else
132 4 : wpabuf_put(req, CHALLENGE_LEN);
133 57 : wpa_hexdump(MSG_MSGDUMP, "EAP-MSCHAPV2: Challenge",
134 57 : data->auth_challenge, CHALLENGE_LEN);
135 57 : wpabuf_put_data(req, sm->server_id, sm->server_id_len);
136 :
137 57 : return req;
138 : }
139 :
140 :
141 44 : static struct wpabuf * eap_mschapv2_build_success_req(
142 : struct eap_sm *sm, struct eap_mschapv2_data *data, u8 id)
143 : {
144 : struct wpabuf *req;
145 : struct eap_mschapv2_hdr *ms;
146 : u8 *msg;
147 44 : char *message = "OK";
148 : size_t ms_len;
149 :
150 44 : ms_len = sizeof(*ms) + 2 + 2 * sizeof(data->auth_response) + 1 + 2 +
151 44 : os_strlen(message);
152 44 : req = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2, ms_len,
153 : EAP_CODE_REQUEST, id);
154 44 : if (req == NULL) {
155 0 : wpa_printf(MSG_ERROR, "EAP-MSCHAPV2: Failed to allocate memory"
156 : " for request");
157 0 : data->state = FAILURE;
158 0 : return NULL;
159 : }
160 :
161 44 : ms = wpabuf_put(req, sizeof(*ms));
162 44 : ms->op_code = MSCHAPV2_OP_SUCCESS;
163 44 : ms->mschapv2_id = data->resp_mschapv2_id;
164 44 : WPA_PUT_BE16(ms->ms_length, ms_len);
165 44 : msg = (u8 *) (ms + 1);
166 :
167 44 : wpabuf_put_u8(req, 'S');
168 44 : wpabuf_put_u8(req, '=');
169 44 : wpa_snprintf_hex_uppercase(
170 44 : wpabuf_put(req, sizeof(data->auth_response) * 2),
171 : sizeof(data->auth_response) * 2 + 1,
172 44 : data->auth_response, sizeof(data->auth_response));
173 44 : wpabuf_put_u8(req, ' ');
174 44 : wpabuf_put_u8(req, 'M');
175 44 : wpabuf_put_u8(req, '=');
176 44 : wpabuf_put_data(req, message, os_strlen(message));
177 :
178 44 : wpa_hexdump_ascii(MSG_MSGDUMP, "EAP-MSCHAPV2: Success Request Message",
179 : msg, ms_len - sizeof(*ms));
180 :
181 44 : return req;
182 : }
183 :
184 :
185 2 : static struct wpabuf * eap_mschapv2_build_failure_req(
186 : struct eap_sm *sm, struct eap_mschapv2_data *data, u8 id)
187 : {
188 : struct wpabuf *req;
189 : struct eap_mschapv2_hdr *ms;
190 2 : char *message = "E=691 R=0 C=00000000000000000000000000000000 V=3 "
191 : "M=FAILED";
192 : size_t ms_len;
193 :
194 2 : ms_len = sizeof(*ms) + os_strlen(message);
195 2 : req = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2, ms_len,
196 : EAP_CODE_REQUEST, id);
197 2 : if (req == NULL) {
198 0 : wpa_printf(MSG_ERROR, "EAP-MSCHAPV2: Failed to allocate memory"
199 : " for request");
200 0 : data->state = FAILURE;
201 0 : return NULL;
202 : }
203 :
204 2 : ms = wpabuf_put(req, sizeof(*ms));
205 2 : ms->op_code = MSCHAPV2_OP_FAILURE;
206 2 : ms->mschapv2_id = data->resp_mschapv2_id;
207 2 : WPA_PUT_BE16(ms->ms_length, ms_len);
208 :
209 2 : wpabuf_put_data(req, message, os_strlen(message));
210 :
211 2 : wpa_hexdump_ascii(MSG_MSGDUMP, "EAP-MSCHAPV2: Failure Request Message",
212 : (u8 *) message, os_strlen(message));
213 :
214 2 : return req;
215 : }
216 :
217 :
218 103 : static struct wpabuf * eap_mschapv2_buildReq(struct eap_sm *sm, void *priv,
219 : u8 id)
220 : {
221 103 : struct eap_mschapv2_data *data = priv;
222 :
223 103 : switch (data->state) {
224 : case CHALLENGE:
225 57 : return eap_mschapv2_build_challenge(sm, data, id);
226 : case SUCCESS_REQ:
227 44 : return eap_mschapv2_build_success_req(sm, data, id);
228 : case FAILURE_REQ:
229 2 : return eap_mschapv2_build_failure_req(sm, data, id);
230 : default:
231 0 : wpa_printf(MSG_DEBUG, "EAP-MSCHAPV2: Unknown state %d in "
232 0 : "buildReq", data->state);
233 0 : break;
234 : }
235 0 : return NULL;
236 : }
237 :
238 :
239 92 : static Boolean eap_mschapv2_check(struct eap_sm *sm, void *priv,
240 : struct wpabuf *respData)
241 : {
242 92 : struct eap_mschapv2_data *data = priv;
243 : struct eap_mschapv2_hdr *resp;
244 : const u8 *pos;
245 : size_t len;
246 :
247 92 : pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2, respData,
248 : &len);
249 92 : if (pos == NULL || len < 1) {
250 0 : wpa_printf(MSG_INFO, "EAP-MSCHAPV2: Invalid frame");
251 0 : return TRUE;
252 : }
253 :
254 92 : resp = (struct eap_mschapv2_hdr *) pos;
255 138 : if (data->state == CHALLENGE &&
256 46 : resp->op_code != MSCHAPV2_OP_RESPONSE) {
257 0 : wpa_printf(MSG_DEBUG, "EAP-MSCHAPV2: Expected Response - "
258 0 : "ignore op %d", resp->op_code);
259 0 : return TRUE;
260 : }
261 :
262 136 : if (data->state == SUCCESS_REQ &&
263 44 : resp->op_code != MSCHAPV2_OP_SUCCESS &&
264 0 : resp->op_code != MSCHAPV2_OP_FAILURE) {
265 0 : wpa_printf(MSG_DEBUG, "EAP-MSCHAPV2: Expected Success or "
266 0 : "Failure - ignore op %d", resp->op_code);
267 0 : return TRUE;
268 : }
269 :
270 94 : if (data->state == FAILURE_REQ &&
271 2 : resp->op_code != MSCHAPV2_OP_FAILURE) {
272 0 : wpa_printf(MSG_DEBUG, "EAP-MSCHAPV2: Expected Failure "
273 0 : "- ignore op %d", resp->op_code);
274 0 : return TRUE;
275 : }
276 :
277 92 : return FALSE;
278 : }
279 :
280 :
281 46 : static void eap_mschapv2_process_response(struct eap_sm *sm,
282 : struct eap_mschapv2_data *data,
283 : struct wpabuf *respData)
284 : {
285 : struct eap_mschapv2_hdr *resp;
286 : const u8 *pos, *end, *peer_challenge, *nt_response, *name;
287 : u8 flags;
288 : size_t len, name_len, i;
289 : u8 expected[24];
290 : const u8 *username, *user;
291 : size_t username_len, user_len;
292 : int res;
293 : char *buf;
294 :
295 46 : pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2, respData,
296 : &len);
297 46 : if (pos == NULL || len < 1)
298 0 : return; /* Should not happen - frame already validated */
299 :
300 46 : end = pos + len;
301 46 : resp = (struct eap_mschapv2_hdr *) pos;
302 46 : pos = (u8 *) (resp + 1);
303 :
304 92 : if (len < sizeof(*resp) + 1 + 49 ||
305 92 : resp->op_code != MSCHAPV2_OP_RESPONSE ||
306 46 : pos[0] != 49) {
307 0 : wpa_hexdump_buf(MSG_DEBUG, "EAP-MSCHAPV2: Invalid response",
308 : respData);
309 0 : data->state = FAILURE;
310 0 : return;
311 : }
312 46 : data->resp_mschapv2_id = resp->mschapv2_id;
313 46 : pos++;
314 46 : peer_challenge = pos;
315 46 : pos += 16 + 8;
316 46 : nt_response = pos;
317 46 : pos += 24;
318 46 : flags = *pos++;
319 46 : name = pos;
320 46 : name_len = end - name;
321 :
322 46 : if (data->peer_challenge) {
323 4 : wpa_printf(MSG_DEBUG, "EAP-MSCHAPV2: Using pre-configured "
324 : "Peer-Challenge");
325 4 : peer_challenge = data->peer_challenge;
326 : }
327 46 : wpa_hexdump(MSG_MSGDUMP, "EAP-MSCHAPV2: Peer-Challenge",
328 : peer_challenge, 16);
329 46 : wpa_hexdump(MSG_MSGDUMP, "EAP-MSCHAPV2: NT-Response", nt_response, 24);
330 46 : wpa_printf(MSG_MSGDUMP, "EAP-MSCHAPV2: Flags 0x%x", flags);
331 46 : wpa_hexdump_ascii(MSG_MSGDUMP, "EAP-MSCHAPV2: Name", name, name_len);
332 :
333 46 : buf = os_malloc(name_len * 3 + 1);
334 46 : if (buf) {
335 46 : printf_encode(buf, name_len * 3 + 1, name, name_len);
336 46 : eap_log_msg(sm, "EAP-MSCHAPV2 Name '%s'", buf);
337 46 : os_free(buf);
338 : }
339 :
340 : /* MSCHAPv2 does not include optional domain name in the
341 : * challenge-response calculation, so remove domain prefix
342 : * (if present). */
343 46 : username = sm->identity;
344 46 : username_len = sm->identity_len;
345 230 : for (i = 0; i < username_len; i++) {
346 184 : if (username[i] == '\\') {
347 0 : username_len -= i + 1;
348 0 : username += i + 1;
349 0 : break;
350 : }
351 : }
352 :
353 46 : user = name;
354 46 : user_len = name_len;
355 230 : for (i = 0; i < user_len; i++) {
356 184 : if (user[i] == '\\') {
357 0 : user_len -= i + 1;
358 0 : user += i + 1;
359 0 : break;
360 : }
361 : }
362 :
363 92 : if (username_len != user_len ||
364 46 : os_memcmp(username, user, username_len) != 0) {
365 0 : wpa_printf(MSG_DEBUG, "EAP-MSCHAPV2: Mismatch in user names");
366 0 : wpa_hexdump_ascii(MSG_DEBUG, "EAP-MSCHAPV2: Expected user "
367 : "name", username, username_len);
368 0 : wpa_hexdump_ascii(MSG_DEBUG, "EAP-MSCHAPV2: Received user "
369 : "name", user, user_len);
370 0 : data->state = FAILURE;
371 0 : return;
372 : }
373 :
374 46 : wpa_hexdump_ascii(MSG_MSGDUMP, "EAP-MSCHAPV2: User name",
375 : username, username_len);
376 :
377 46 : if (sm->user->password_hash) {
378 0 : res = generate_nt_response_pwhash(data->auth_challenge,
379 : peer_challenge,
380 : username, username_len,
381 0 : sm->user->password,
382 : expected);
383 : } else {
384 92 : res = generate_nt_response(data->auth_challenge,
385 : peer_challenge,
386 : username, username_len,
387 46 : sm->user->password,
388 46 : sm->user->password_len,
389 : expected);
390 : }
391 46 : if (res) {
392 0 : data->state = FAILURE;
393 0 : return;
394 : }
395 :
396 46 : if (os_memcmp(nt_response, expected, 24) == 0) {
397 : const u8 *pw_hash;
398 : u8 pw_hash_buf[16], pw_hash_hash[16];
399 :
400 44 : wpa_printf(MSG_DEBUG, "EAP-MSCHAPV2: Correct NT-Response");
401 44 : data->state = SUCCESS_REQ;
402 :
403 : /* Authenticator response is not really needed yet, but
404 : * calculate it here so that peer_challenge and username need
405 : * not be saved. */
406 44 : if (sm->user->password_hash) {
407 0 : pw_hash = sm->user->password;
408 : } else {
409 44 : if (nt_password_hash(sm->user->password,
410 44 : sm->user->password_len,
411 : pw_hash_buf) < 0) {
412 0 : data->state = FAILURE;
413 0 : return;
414 : }
415 44 : pw_hash = pw_hash_buf;
416 : }
417 44 : generate_authenticator_response_pwhash(
418 44 : pw_hash, peer_challenge, data->auth_challenge,
419 : username, username_len, nt_response,
420 44 : data->auth_response);
421 :
422 44 : hash_nt_password_hash(pw_hash, pw_hash_hash);
423 44 : get_master_key(pw_hash_hash, nt_response, data->master_key);
424 44 : data->master_key_valid = 1;
425 44 : wpa_hexdump_key(MSG_DEBUG, "EAP-MSCHAPV2: Derived Master Key",
426 44 : data->master_key, MSCHAPV2_KEY_LEN);
427 : } else {
428 2 : wpa_hexdump(MSG_MSGDUMP, "EAP-MSCHAPV2: Expected NT-Response",
429 : expected, 24);
430 2 : wpa_printf(MSG_DEBUG, "EAP-MSCHAPV2: Invalid NT-Response");
431 2 : data->state = FAILURE_REQ;
432 : }
433 : }
434 :
435 :
436 44 : static void eap_mschapv2_process_success_resp(struct eap_sm *sm,
437 : struct eap_mschapv2_data *data,
438 : struct wpabuf *respData)
439 : {
440 : struct eap_mschapv2_hdr *resp;
441 : const u8 *pos;
442 : size_t len;
443 :
444 44 : pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2, respData,
445 : &len);
446 44 : if (pos == NULL || len < 1)
447 44 : return; /* Should not happen - frame already validated */
448 :
449 44 : resp = (struct eap_mschapv2_hdr *) pos;
450 :
451 44 : if (resp->op_code == MSCHAPV2_OP_SUCCESS) {
452 44 : wpa_printf(MSG_DEBUG, "EAP-MSCHAPV2: Received Success Response"
453 : " - authentication completed successfully");
454 44 : data->state = SUCCESS;
455 : } else {
456 0 : wpa_printf(MSG_DEBUG, "EAP-MSCHAPV2: Did not receive Success "
457 : "Response - peer rejected authentication");
458 0 : data->state = FAILURE;
459 : }
460 : }
461 :
462 :
463 2 : static void eap_mschapv2_process_failure_resp(struct eap_sm *sm,
464 : struct eap_mschapv2_data *data,
465 : struct wpabuf *respData)
466 : {
467 : struct eap_mschapv2_hdr *resp;
468 : const u8 *pos;
469 : size_t len;
470 :
471 2 : pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2, respData,
472 : &len);
473 2 : if (pos == NULL || len < 1)
474 2 : return; /* Should not happen - frame already validated */
475 :
476 2 : resp = (struct eap_mschapv2_hdr *) pos;
477 :
478 2 : if (resp->op_code == MSCHAPV2_OP_FAILURE) {
479 2 : wpa_printf(MSG_DEBUG, "EAP-MSCHAPV2: Received Failure Response"
480 : " - authentication failed");
481 : } else {
482 0 : wpa_printf(MSG_DEBUG, "EAP-MSCHAPV2: Did not receive Failure "
483 : "Response - authentication failed");
484 : }
485 :
486 2 : data->state = FAILURE;
487 : }
488 :
489 :
490 92 : static void eap_mschapv2_process(struct eap_sm *sm, void *priv,
491 : struct wpabuf *respData)
492 : {
493 92 : struct eap_mschapv2_data *data = priv;
494 :
495 92 : if (sm->user == NULL || sm->user->password == NULL) {
496 0 : wpa_printf(MSG_INFO, "EAP-MSCHAPV2: Password not configured");
497 0 : data->state = FAILURE;
498 92 : return;
499 : }
500 :
501 92 : switch (data->state) {
502 : case CHALLENGE:
503 46 : eap_mschapv2_process_response(sm, data, respData);
504 46 : break;
505 : case SUCCESS_REQ:
506 44 : eap_mschapv2_process_success_resp(sm, data, respData);
507 44 : break;
508 : case FAILURE_REQ:
509 2 : eap_mschapv2_process_failure_resp(sm, data, respData);
510 2 : break;
511 : default:
512 0 : wpa_printf(MSG_DEBUG, "EAP-MSCHAPV2: Unknown state %d in "
513 0 : "process", data->state);
514 0 : break;
515 : }
516 : }
517 :
518 :
519 92 : static Boolean eap_mschapv2_isDone(struct eap_sm *sm, void *priv)
520 : {
521 92 : struct eap_mschapv2_data *data = priv;
522 92 : return data->state == SUCCESS || data->state == FAILURE;
523 : }
524 :
525 :
526 38 : static u8 * eap_mschapv2_getKey(struct eap_sm *sm, void *priv, size_t *len)
527 : {
528 38 : struct eap_mschapv2_data *data = priv;
529 : u8 *key;
530 :
531 38 : if (data->state != SUCCESS || !data->master_key_valid)
532 0 : return NULL;
533 :
534 38 : *len = 2 * MSCHAPV2_KEY_LEN;
535 38 : key = os_malloc(*len);
536 38 : if (key == NULL)
537 0 : return NULL;
538 : /* MSK = server MS-MPPE-Recv-Key | MS-MPPE-Send-Key */
539 38 : get_asymetric_start_key(data->master_key, key, MSCHAPV2_KEY_LEN, 0, 1);
540 38 : get_asymetric_start_key(data->master_key, key + MSCHAPV2_KEY_LEN,
541 : MSCHAPV2_KEY_LEN, 1, 1);
542 38 : wpa_hexdump_key(MSG_DEBUG, "EAP-MSCHAPV2: Derived key", key, *len);
543 :
544 38 : return key;
545 : }
546 :
547 :
548 46 : static Boolean eap_mschapv2_isSuccess(struct eap_sm *sm, void *priv)
549 : {
550 46 : struct eap_mschapv2_data *data = priv;
551 46 : return data->state == SUCCESS;
552 : }
553 :
554 :
555 2 : int eap_server_mschapv2_register(void)
556 : {
557 : struct eap_method *eap;
558 : int ret;
559 :
560 2 : eap = eap_server_method_alloc(EAP_SERVER_METHOD_INTERFACE_VERSION,
561 : EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2,
562 : "MSCHAPV2");
563 2 : if (eap == NULL)
564 0 : return -1;
565 :
566 2 : eap->init = eap_mschapv2_init;
567 2 : eap->reset = eap_mschapv2_reset;
568 2 : eap->buildReq = eap_mschapv2_buildReq;
569 2 : eap->check = eap_mschapv2_check;
570 2 : eap->process = eap_mschapv2_process;
571 2 : eap->isDone = eap_mschapv2_isDone;
572 2 : eap->getKey = eap_mschapv2_getKey;
573 2 : eap->isSuccess = eap_mschapv2_isSuccess;
574 :
575 2 : ret = eap_server_method_register(eap);
576 2 : if (ret)
577 0 : eap_server_method_free(eap);
578 2 : return ret;
579 : }
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