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6fc6879b | 1 | /* |
362bd35f | 2 | * RADIUS authentication server |
505a3694 | 3 | * Copyright (c) 2005-2009, 2011, Jouni Malinen <j@w1.fi> |
6fc6879b JM |
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 | #include <net/if.h> | |
17 | ||
18 | #include "common.h" | |
19 | #include "radius.h" | |
20 | #include "eloop.h" | |
6fc6879b JM |
21 | #include "eap_server/eap.h" |
22 | #include "radius_server.h" | |
23 | ||
362bd35f JM |
24 | /** |
25 | * RADIUS_SESSION_TIMEOUT - Session timeout in seconds | |
26 | */ | |
6fc6879b | 27 | #define RADIUS_SESSION_TIMEOUT 60 |
362bd35f JM |
28 | |
29 | /** | |
30 | * RADIUS_MAX_SESSION - Maximum number of active sessions | |
31 | */ | |
6fc6879b | 32 | #define RADIUS_MAX_SESSION 100 |
362bd35f JM |
33 | |
34 | /** | |
35 | * RADIUS_MAX_MSG_LEN - Maximum message length for incoming RADIUS messages | |
36 | */ | |
6fc6879b JM |
37 | #define RADIUS_MAX_MSG_LEN 3000 |
38 | ||
39 | static struct eapol_callbacks radius_server_eapol_cb; | |
40 | ||
41 | struct radius_client; | |
42 | struct radius_server_data; | |
43 | ||
362bd35f JM |
44 | /** |
45 | * struct radius_server_counters - RADIUS server statistics counters | |
46 | */ | |
6fc6879b JM |
47 | struct radius_server_counters { |
48 | u32 access_requests; | |
49 | u32 invalid_requests; | |
50 | u32 dup_access_requests; | |
51 | u32 access_accepts; | |
52 | u32 access_rejects; | |
53 | u32 access_challenges; | |
54 | u32 malformed_access_requests; | |
55 | u32 bad_authenticators; | |
56 | u32 packets_dropped; | |
57 | u32 unknown_types; | |
58 | }; | |
59 | ||
362bd35f JM |
60 | /** |
61 | * struct radius_session - Internal RADIUS server data for a session | |
62 | */ | |
6fc6879b JM |
63 | struct radius_session { |
64 | struct radius_session *next; | |
65 | struct radius_client *client; | |
66 | struct radius_server_data *server; | |
67 | unsigned int sess_id; | |
68 | struct eap_sm *eap; | |
69 | struct eap_eapol_interface *eap_if; | |
70 | ||
71 | struct radius_msg *last_msg; | |
72 | char *last_from_addr; | |
73 | int last_from_port; | |
74 | struct sockaddr_storage last_from; | |
75 | socklen_t last_fromlen; | |
76 | u8 last_identifier; | |
77 | struct radius_msg *last_reply; | |
78 | u8 last_authenticator[16]; | |
79 | }; | |
80 | ||
362bd35f JM |
81 | /** |
82 | * struct radius_client - Internal RADIUS server data for a client | |
83 | */ | |
6fc6879b JM |
84 | struct radius_client { |
85 | struct radius_client *next; | |
86 | struct in_addr addr; | |
87 | struct in_addr mask; | |
88 | #ifdef CONFIG_IPV6 | |
89 | struct in6_addr addr6; | |
90 | struct in6_addr mask6; | |
91 | #endif /* CONFIG_IPV6 */ | |
92 | char *shared_secret; | |
93 | int shared_secret_len; | |
94 | struct radius_session *sessions; | |
95 | struct radius_server_counters counters; | |
96 | }; | |
97 | ||
362bd35f JM |
98 | /** |
99 | * struct radius_server_data - Internal RADIUS server data | |
100 | */ | |
6fc6879b | 101 | struct radius_server_data { |
362bd35f JM |
102 | /** |
103 | * auth_sock - Socket for RADIUS authentication messages | |
104 | */ | |
6fc6879b | 105 | int auth_sock; |
362bd35f JM |
106 | |
107 | /** | |
108 | * clients - List of authorized RADIUS clients | |
109 | */ | |
6fc6879b | 110 | struct radius_client *clients; |
362bd35f JM |
111 | |
112 | /** | |
113 | * next_sess_id - Next session identifier | |
114 | */ | |
6fc6879b | 115 | unsigned int next_sess_id; |
362bd35f JM |
116 | |
117 | /** | |
118 | * conf_ctx - Context pointer for callbacks | |
119 | * | |
120 | * This is used as the ctx argument in get_eap_user() calls. | |
121 | */ | |
6fc6879b | 122 | void *conf_ctx; |
362bd35f JM |
123 | |
124 | /** | |
125 | * num_sess - Number of active sessions | |
126 | */ | |
6fc6879b | 127 | int num_sess; |
362bd35f JM |
128 | |
129 | /** | |
130 | * eap_sim_db_priv - EAP-SIM/AKA database context | |
131 | * | |
132 | * This is passed to the EAP-SIM/AKA server implementation as a | |
133 | * callback context. | |
134 | */ | |
6fc6879b | 135 | void *eap_sim_db_priv; |
362bd35f JM |
136 | |
137 | /** | |
138 | * ssl_ctx - TLS context | |
139 | * | |
140 | * This is passed to the EAP server implementation as a callback | |
141 | * context for TLS operations. | |
142 | */ | |
6fc6879b | 143 | void *ssl_ctx; |
362bd35f JM |
144 | |
145 | /** | |
146 | * pac_opaque_encr_key - PAC-Opaque encryption key for EAP-FAST | |
147 | * | |
148 | * This parameter is used to set a key for EAP-FAST to encrypt the | |
149 | * PAC-Opaque data. It can be set to %NULL if EAP-FAST is not used. If | |
150 | * set, must point to a 16-octet key. | |
151 | */ | |
6fc6879b | 152 | u8 *pac_opaque_encr_key; |
362bd35f JM |
153 | |
154 | /** | |
155 | * eap_fast_a_id - EAP-FAST authority identity (A-ID) | |
156 | * | |
157 | * If EAP-FAST is not used, this can be set to %NULL. In theory, this | |
158 | * is a variable length field, but due to some existing implementations | |
159 | * requiring A-ID to be 16 octets in length, it is recommended to use | |
160 | * that length for the field to provide interoperability with deployed | |
161 | * peer implementations. | |
162 | */ | |
2d867244 | 163 | u8 *eap_fast_a_id; |
362bd35f JM |
164 | |
165 | /** | |
166 | * eap_fast_a_id_len - Length of eap_fast_a_id buffer in octets | |
167 | */ | |
2d867244 | 168 | size_t eap_fast_a_id_len; |
362bd35f JM |
169 | |
170 | /** | |
171 | * eap_fast_a_id_info - EAP-FAST authority identifier information | |
172 | * | |
173 | * This A-ID-Info contains a user-friendly name for the A-ID. For | |
174 | * example, this could be the enterprise and server names in | |
175 | * human-readable format. This field is encoded as UTF-8. If EAP-FAST | |
176 | * is not used, this can be set to %NULL. | |
177 | */ | |
2d867244 | 178 | char *eap_fast_a_id_info; |
362bd35f JM |
179 | |
180 | /** | |
181 | * eap_fast_prov - EAP-FAST provisioning modes | |
182 | * | |
183 | * 0 = provisioning disabled, 1 = only anonymous provisioning allowed, | |
184 | * 2 = only authenticated provisioning allowed, 3 = both provisioning | |
185 | * modes allowed. | |
186 | */ | |
378eae5e | 187 | int eap_fast_prov; |
362bd35f JM |
188 | |
189 | /** | |
190 | * pac_key_lifetime - EAP-FAST PAC-Key lifetime in seconds | |
191 | * | |
192 | * This is the hard limit on how long a provisioned PAC-Key can be | |
193 | * used. | |
194 | */ | |
a11c90a6 | 195 | int pac_key_lifetime; |
362bd35f JM |
196 | |
197 | /** | |
198 | * pac_key_refresh_time - EAP-FAST PAC-Key refresh time in seconds | |
199 | * | |
200 | * This is a soft limit on the PAC-Key. The server will automatically | |
201 | * generate a new PAC-Key when this number of seconds (or fewer) of the | |
202 | * lifetime remains. | |
203 | */ | |
a11c90a6 | 204 | int pac_key_refresh_time; |
362bd35f JM |
205 | |
206 | /** | |
207 | * eap_sim_aka_result_ind - EAP-SIM/AKA protected success indication | |
208 | * | |
209 | * This controls whether the protected success/failure indication | |
210 | * (AT_RESULT_IND) is used with EAP-SIM and EAP-AKA. | |
211 | */ | |
6fc6879b | 212 | int eap_sim_aka_result_ind; |
362bd35f JM |
213 | |
214 | /** | |
215 | * tnc - Trusted Network Connect (TNC) | |
216 | * | |
217 | * This controls whether TNC is enabled and will be required before the | |
218 | * peer is allowed to connect. Note: This is only used with EAP-TTLS | |
219 | * and EAP-FAST. If any other EAP method is enabled, the peer will be | |
220 | * allowed to connect without TNC. | |
221 | */ | |
c3e258ae | 222 | int tnc; |
362bd35f | 223 | |
df684d82 DH |
224 | /** |
225 | * pwd_group - The D-H group assigned for EAP-pwd | |
226 | * | |
227 | * If EAP-pwd is not used it can be set to zero. | |
228 | */ | |
229 | u16 pwd_group; | |
230 | ||
362bd35f JM |
231 | /** |
232 | * wps - Wi-Fi Protected Setup context | |
233 | * | |
234 | * If WPS is used with an external RADIUS server (which is quite | |
235 | * unlikely configuration), this is used to provide a pointer to WPS | |
236 | * context data. Normally, this can be set to %NULL. | |
237 | */ | |
ad08c363 | 238 | struct wps_context *wps; |
362bd35f JM |
239 | |
240 | /** | |
241 | * ipv6 - Whether to enable IPv6 support in the RADIUS server | |
242 | */ | |
6fc6879b | 243 | int ipv6; |
362bd35f JM |
244 | |
245 | /** | |
246 | * start_time - Timestamp of server start | |
247 | */ | |
6fc6879b | 248 | struct os_time start_time; |
362bd35f JM |
249 | |
250 | /** | |
251 | * counters - Statistics counters for server operations | |
252 | * | |
253 | * These counters are the sum over all clients. | |
254 | */ | |
6fc6879b | 255 | struct radius_server_counters counters; |
362bd35f JM |
256 | |
257 | /** | |
258 | * get_eap_user - Callback for fetching EAP user information | |
259 | * @ctx: Context data from conf_ctx | |
260 | * @identity: User identity | |
261 | * @identity_len: identity buffer length in octets | |
262 | * @phase2: Whether this is for Phase 2 identity | |
263 | * @user: Data structure for filling in the user information | |
264 | * Returns: 0 on success, -1 on failure | |
265 | * | |
266 | * This is used to fetch information from user database. The callback | |
267 | * will fill in information about allowed EAP methods and the user | |
268 | * password. The password field will be an allocated copy of the | |
269 | * password data and RADIUS server will free it after use. | |
270 | */ | |
6fc6879b JM |
271 | int (*get_eap_user)(void *ctx, const u8 *identity, size_t identity_len, |
272 | int phase2, struct eap_user *user); | |
362bd35f JM |
273 | |
274 | /** | |
275 | * eap_req_id_text - Optional data for EAP-Request/Identity | |
276 | * | |
277 | * This can be used to configure an optional, displayable message that | |
278 | * will be sent in EAP-Request/Identity. This string can contain an | |
279 | * ASCII-0 character (nul) to separate network infromation per RFC | |
280 | * 4284. The actual string length is explicit provided in | |
281 | * eap_req_id_text_len since nul character will not be used as a string | |
282 | * terminator. | |
283 | */ | |
65d50f0a | 284 | char *eap_req_id_text; |
362bd35f JM |
285 | |
286 | /** | |
287 | * eap_req_id_text_len - Length of eap_req_id_text buffer in octets | |
288 | */ | |
65d50f0a | 289 | size_t eap_req_id_text_len; |
bb437f28 GD |
290 | |
291 | /* | |
292 | * msg_ctx - Context data for wpa_msg() calls | |
293 | */ | |
294 | void *msg_ctx; | |
505a3694 JM |
295 | |
296 | #ifdef CONFIG_RADIUS_TEST | |
297 | char *dump_msk_file; | |
298 | #endif /* CONFIG_RADIUS_TEST */ | |
6fc6879b JM |
299 | }; |
300 | ||
301 | ||
302 | extern int wpa_debug_level; | |
303 | ||
304 | #define RADIUS_DEBUG(args...) \ | |
305 | wpa_printf(MSG_DEBUG, "RADIUS SRV: " args) | |
306 | #define RADIUS_ERROR(args...) \ | |
307 | wpa_printf(MSG_ERROR, "RADIUS SRV: " args) | |
308 | #define RADIUS_DUMP(args...) \ | |
309 | wpa_hexdump(MSG_MSGDUMP, "RADIUS SRV: " args) | |
310 | #define RADIUS_DUMP_ASCII(args...) \ | |
311 | wpa_hexdump_ascii(MSG_MSGDUMP, "RADIUS SRV: " args) | |
312 | ||
313 | ||
314 | static void radius_server_session_timeout(void *eloop_ctx, void *timeout_ctx); | |
f481459f JM |
315 | static void radius_server_session_remove_timeout(void *eloop_ctx, |
316 | void *timeout_ctx); | |
6fc6879b JM |
317 | |
318 | ||
319 | static struct radius_client * | |
320 | radius_server_get_client(struct radius_server_data *data, struct in_addr *addr, | |
321 | int ipv6) | |
322 | { | |
323 | struct radius_client *client = data->clients; | |
324 | ||
325 | while (client) { | |
326 | #ifdef CONFIG_IPV6 | |
327 | if (ipv6) { | |
328 | struct in6_addr *addr6; | |
329 | int i; | |
330 | ||
331 | addr6 = (struct in6_addr *) addr; | |
332 | for (i = 0; i < 16; i++) { | |
333 | if ((addr6->s6_addr[i] & | |
334 | client->mask6.s6_addr[i]) != | |
335 | (client->addr6.s6_addr[i] & | |
336 | client->mask6.s6_addr[i])) { | |
337 | i = 17; | |
338 | break; | |
339 | } | |
340 | } | |
341 | if (i == 16) { | |
342 | break; | |
343 | } | |
344 | } | |
345 | #endif /* CONFIG_IPV6 */ | |
346 | if (!ipv6 && (client->addr.s_addr & client->mask.s_addr) == | |
347 | (addr->s_addr & client->mask.s_addr)) { | |
348 | break; | |
349 | } | |
350 | ||
351 | client = client->next; | |
352 | } | |
353 | ||
354 | return client; | |
355 | } | |
356 | ||
357 | ||
358 | static struct radius_session * | |
359 | radius_server_get_session(struct radius_client *client, unsigned int sess_id) | |
360 | { | |
361 | struct radius_session *sess = client->sessions; | |
362 | ||
363 | while (sess) { | |
364 | if (sess->sess_id == sess_id) { | |
365 | break; | |
366 | } | |
367 | sess = sess->next; | |
368 | } | |
369 | ||
370 | return sess; | |
371 | } | |
372 | ||
373 | ||
374 | static void radius_server_session_free(struct radius_server_data *data, | |
375 | struct radius_session *sess) | |
376 | { | |
377 | eloop_cancel_timeout(radius_server_session_timeout, data, sess); | |
f481459f | 378 | eloop_cancel_timeout(radius_server_session_remove_timeout, data, sess); |
6fc6879b | 379 | eap_server_sm_deinit(sess->eap); |
9e7245bd | 380 | radius_msg_free(sess->last_msg); |
6fc6879b | 381 | os_free(sess->last_from_addr); |
9e7245bd | 382 | radius_msg_free(sess->last_reply); |
6fc6879b JM |
383 | os_free(sess); |
384 | data->num_sess--; | |
385 | } | |
386 | ||
387 | ||
6fc6879b JM |
388 | static void radius_server_session_remove(struct radius_server_data *data, |
389 | struct radius_session *sess) | |
390 | { | |
391 | struct radius_client *client = sess->client; | |
392 | struct radius_session *session, *prev; | |
393 | ||
394 | eloop_cancel_timeout(radius_server_session_remove_timeout, data, sess); | |
395 | ||
396 | prev = NULL; | |
397 | session = client->sessions; | |
398 | while (session) { | |
399 | if (session == sess) { | |
400 | if (prev == NULL) { | |
401 | client->sessions = sess->next; | |
402 | } else { | |
403 | prev->next = sess->next; | |
404 | } | |
405 | radius_server_session_free(data, sess); | |
406 | break; | |
407 | } | |
408 | prev = session; | |
409 | session = session->next; | |
410 | } | |
411 | } | |
412 | ||
413 | ||
414 | static void radius_server_session_remove_timeout(void *eloop_ctx, | |
415 | void *timeout_ctx) | |
416 | { | |
417 | struct radius_server_data *data = eloop_ctx; | |
418 | struct radius_session *sess = timeout_ctx; | |
419 | RADIUS_DEBUG("Removing completed session 0x%x", sess->sess_id); | |
420 | radius_server_session_remove(data, sess); | |
421 | } | |
422 | ||
423 | ||
424 | static void radius_server_session_timeout(void *eloop_ctx, void *timeout_ctx) | |
425 | { | |
426 | struct radius_server_data *data = eloop_ctx; | |
427 | struct radius_session *sess = timeout_ctx; | |
428 | ||
429 | RADIUS_DEBUG("Timing out authentication session 0x%x", sess->sess_id); | |
430 | radius_server_session_remove(data, sess); | |
431 | } | |
432 | ||
433 | ||
434 | static struct radius_session * | |
435 | radius_server_new_session(struct radius_server_data *data, | |
436 | struct radius_client *client) | |
437 | { | |
438 | struct radius_session *sess; | |
439 | ||
440 | if (data->num_sess >= RADIUS_MAX_SESSION) { | |
441 | RADIUS_DEBUG("Maximum number of existing session - no room " | |
442 | "for a new session"); | |
443 | return NULL; | |
444 | } | |
445 | ||
446 | sess = os_zalloc(sizeof(*sess)); | |
447 | if (sess == NULL) | |
448 | return NULL; | |
449 | ||
450 | sess->server = data; | |
451 | sess->client = client; | |
452 | sess->sess_id = data->next_sess_id++; | |
453 | sess->next = client->sessions; | |
454 | client->sessions = sess; | |
455 | eloop_register_timeout(RADIUS_SESSION_TIMEOUT, 0, | |
456 | radius_server_session_timeout, data, sess); | |
457 | data->num_sess++; | |
458 | return sess; | |
459 | } | |
460 | ||
461 | ||
462 | static struct radius_session * | |
463 | radius_server_get_new_session(struct radius_server_data *data, | |
464 | struct radius_client *client, | |
465 | struct radius_msg *msg) | |
466 | { | |
467 | u8 *user; | |
468 | size_t user_len; | |
469 | int res; | |
470 | struct radius_session *sess; | |
471 | struct eap_config eap_conf; | |
472 | ||
473 | RADIUS_DEBUG("Creating a new session"); | |
474 | ||
475 | user = os_malloc(256); | |
476 | if (user == NULL) { | |
477 | return NULL; | |
478 | } | |
479 | res = radius_msg_get_attr(msg, RADIUS_ATTR_USER_NAME, user, 256); | |
480 | if (res < 0 || res > 256) { | |
481 | RADIUS_DEBUG("Could not get User-Name"); | |
482 | os_free(user); | |
483 | return NULL; | |
484 | } | |
485 | user_len = res; | |
486 | RADIUS_DUMP_ASCII("User-Name", user, user_len); | |
487 | ||
488 | res = data->get_eap_user(data->conf_ctx, user, user_len, 0, NULL); | |
489 | os_free(user); | |
490 | ||
491 | if (res == 0) { | |
492 | RADIUS_DEBUG("Matching user entry found"); | |
493 | sess = radius_server_new_session(data, client); | |
494 | if (sess == NULL) { | |
495 | RADIUS_DEBUG("Failed to create a new session"); | |
496 | return NULL; | |
497 | } | |
498 | } else { | |
499 | RADIUS_DEBUG("User-Name not found from user database"); | |
500 | return NULL; | |
501 | } | |
502 | ||
503 | os_memset(&eap_conf, 0, sizeof(eap_conf)); | |
504 | eap_conf.ssl_ctx = data->ssl_ctx; | |
bb437f28 | 505 | eap_conf.msg_ctx = data->msg_ctx; |
6fc6879b JM |
506 | eap_conf.eap_sim_db_priv = data->eap_sim_db_priv; |
507 | eap_conf.backend_auth = TRUE; | |
508 | eap_conf.eap_server = 1; | |
509 | eap_conf.pac_opaque_encr_key = data->pac_opaque_encr_key; | |
510 | eap_conf.eap_fast_a_id = data->eap_fast_a_id; | |
2d867244 JM |
511 | eap_conf.eap_fast_a_id_len = data->eap_fast_a_id_len; |
512 | eap_conf.eap_fast_a_id_info = data->eap_fast_a_id_info; | |
378eae5e | 513 | eap_conf.eap_fast_prov = data->eap_fast_prov; |
a11c90a6 JM |
514 | eap_conf.pac_key_lifetime = data->pac_key_lifetime; |
515 | eap_conf.pac_key_refresh_time = data->pac_key_refresh_time; | |
6fc6879b | 516 | eap_conf.eap_sim_aka_result_ind = data->eap_sim_aka_result_ind; |
c3e258ae | 517 | eap_conf.tnc = data->tnc; |
ad08c363 | 518 | eap_conf.wps = data->wps; |
df684d82 | 519 | eap_conf.pwd_group = data->pwd_group; |
6fc6879b JM |
520 | sess->eap = eap_server_sm_init(sess, &radius_server_eapol_cb, |
521 | &eap_conf); | |
522 | if (sess->eap == NULL) { | |
523 | RADIUS_DEBUG("Failed to initialize EAP state machine for the " | |
524 | "new session"); | |
525 | radius_server_session_free(data, sess); | |
526 | return NULL; | |
527 | } | |
528 | sess->eap_if = eap_get_interface(sess->eap); | |
529 | sess->eap_if->eapRestart = TRUE; | |
530 | sess->eap_if->portEnabled = TRUE; | |
531 | ||
532 | RADIUS_DEBUG("New session 0x%x initialized", sess->sess_id); | |
533 | ||
534 | return sess; | |
535 | } | |
536 | ||
537 | ||
538 | static struct radius_msg * | |
539 | radius_server_encapsulate_eap(struct radius_server_data *data, | |
540 | struct radius_client *client, | |
541 | struct radius_session *sess, | |
542 | struct radius_msg *request) | |
543 | { | |
544 | struct radius_msg *msg; | |
545 | int code; | |
546 | unsigned int sess_id; | |
1489e11a | 547 | struct radius_hdr *hdr = radius_msg_get_hdr(request); |
6fc6879b JM |
548 | |
549 | if (sess->eap_if->eapFail) { | |
550 | sess->eap_if->eapFail = FALSE; | |
551 | code = RADIUS_CODE_ACCESS_REJECT; | |
552 | } else if (sess->eap_if->eapSuccess) { | |
553 | sess->eap_if->eapSuccess = FALSE; | |
554 | code = RADIUS_CODE_ACCESS_ACCEPT; | |
555 | } else { | |
556 | sess->eap_if->eapReq = FALSE; | |
557 | code = RADIUS_CODE_ACCESS_CHALLENGE; | |
558 | } | |
559 | ||
1489e11a | 560 | msg = radius_msg_new(code, hdr->identifier); |
6fc6879b JM |
561 | if (msg == NULL) { |
562 | RADIUS_DEBUG("Failed to allocate reply message"); | |
563 | return NULL; | |
564 | } | |
565 | ||
566 | sess_id = htonl(sess->sess_id); | |
567 | if (code == RADIUS_CODE_ACCESS_CHALLENGE && | |
568 | !radius_msg_add_attr(msg, RADIUS_ATTR_STATE, | |
569 | (u8 *) &sess_id, sizeof(sess_id))) { | |
570 | RADIUS_DEBUG("Failed to add State attribute"); | |
571 | } | |
572 | ||
573 | if (sess->eap_if->eapReqData && | |
574 | !radius_msg_add_eap(msg, wpabuf_head(sess->eap_if->eapReqData), | |
575 | wpabuf_len(sess->eap_if->eapReqData))) { | |
576 | RADIUS_DEBUG("Failed to add EAP-Message attribute"); | |
577 | } | |
578 | ||
579 | if (code == RADIUS_CODE_ACCESS_ACCEPT && sess->eap_if->eapKeyData) { | |
580 | int len; | |
505a3694 JM |
581 | #ifdef CONFIG_RADIUS_TEST |
582 | if (data->dump_msk_file) { | |
583 | FILE *f; | |
584 | char buf[2 * 64 + 1]; | |
585 | f = fopen(data->dump_msk_file, "a"); | |
586 | if (f) { | |
587 | len = sess->eap_if->eapKeyDataLen; | |
588 | if (len > 64) | |
589 | len = 64; | |
590 | len = wpa_snprintf_hex( | |
591 | buf, sizeof(buf), | |
592 | sess->eap_if->eapKeyData, len); | |
593 | buf[len] = '\0'; | |
594 | fprintf(f, "%s\n", buf); | |
595 | fclose(f); | |
596 | } | |
597 | } | |
598 | #endif /* CONFIG_RADIUS_TEST */ | |
6fc6879b JM |
599 | if (sess->eap_if->eapKeyDataLen > 64) { |
600 | len = 32; | |
601 | } else { | |
602 | len = sess->eap_if->eapKeyDataLen / 2; | |
603 | } | |
1489e11a | 604 | if (!radius_msg_add_mppe_keys(msg, hdr->authenticator, |
6fc6879b JM |
605 | (u8 *) client->shared_secret, |
606 | client->shared_secret_len, | |
607 | sess->eap_if->eapKeyData + len, | |
608 | len, sess->eap_if->eapKeyData, | |
609 | len)) { | |
610 | RADIUS_DEBUG("Failed to add MPPE key attributes"); | |
611 | } | |
612 | } | |
613 | ||
614 | if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) { | |
615 | RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)"); | |
616 | radius_msg_free(msg); | |
6fc6879b JM |
617 | return NULL; |
618 | } | |
619 | ||
620 | if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret, | |
621 | client->shared_secret_len, | |
1489e11a | 622 | hdr->authenticator) < 0) { |
6fc6879b JM |
623 | RADIUS_DEBUG("Failed to add Message-Authenticator attribute"); |
624 | } | |
625 | ||
626 | return msg; | |
627 | } | |
628 | ||
629 | ||
630 | static int radius_server_reject(struct radius_server_data *data, | |
631 | struct radius_client *client, | |
632 | struct radius_msg *request, | |
633 | struct sockaddr *from, socklen_t fromlen, | |
634 | const char *from_addr, int from_port) | |
635 | { | |
636 | struct radius_msg *msg; | |
637 | int ret = 0; | |
638 | struct eap_hdr eapfail; | |
1489e11a JM |
639 | struct wpabuf *buf; |
640 | struct radius_hdr *hdr = radius_msg_get_hdr(request); | |
6fc6879b JM |
641 | |
642 | RADIUS_DEBUG("Reject invalid request from %s:%d", | |
643 | from_addr, from_port); | |
644 | ||
1489e11a | 645 | msg = radius_msg_new(RADIUS_CODE_ACCESS_REJECT, hdr->identifier); |
6fc6879b JM |
646 | if (msg == NULL) { |
647 | return -1; | |
648 | } | |
649 | ||
650 | os_memset(&eapfail, 0, sizeof(eapfail)); | |
651 | eapfail.code = EAP_CODE_FAILURE; | |
652 | eapfail.identifier = 0; | |
653 | eapfail.length = host_to_be16(sizeof(eapfail)); | |
654 | ||
655 | if (!radius_msg_add_eap(msg, (u8 *) &eapfail, sizeof(eapfail))) { | |
656 | RADIUS_DEBUG("Failed to add EAP-Message attribute"); | |
657 | } | |
658 | ||
659 | if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) { | |
660 | RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)"); | |
661 | radius_msg_free(msg); | |
6fc6879b JM |
662 | return -1; |
663 | } | |
664 | ||
665 | if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret, | |
666 | client->shared_secret_len, | |
1489e11a JM |
667 | hdr->authenticator) < |
668 | 0) { | |
6fc6879b JM |
669 | RADIUS_DEBUG("Failed to add Message-Authenticator attribute"); |
670 | } | |
671 | ||
672 | if (wpa_debug_level <= MSG_MSGDUMP) { | |
673 | radius_msg_dump(msg); | |
674 | } | |
675 | ||
676 | data->counters.access_rejects++; | |
677 | client->counters.access_rejects++; | |
1489e11a JM |
678 | buf = radius_msg_get_buf(msg); |
679 | if (sendto(data->auth_sock, wpabuf_head(buf), wpabuf_len(buf), 0, | |
6fc6879b JM |
680 | (struct sockaddr *) from, sizeof(*from)) < 0) { |
681 | perror("sendto[RADIUS SRV]"); | |
682 | ret = -1; | |
683 | } | |
684 | ||
685 | radius_msg_free(msg); | |
6fc6879b JM |
686 | |
687 | return ret; | |
688 | } | |
689 | ||
690 | ||
691 | static int radius_server_request(struct radius_server_data *data, | |
692 | struct radius_msg *msg, | |
693 | struct sockaddr *from, socklen_t fromlen, | |
694 | struct radius_client *client, | |
695 | const char *from_addr, int from_port, | |
696 | struct radius_session *force_sess) | |
697 | { | |
698 | u8 *eap = NULL; | |
699 | size_t eap_len; | |
700 | int res, state_included = 0; | |
701 | u8 statebuf[4]; | |
702 | unsigned int state; | |
703 | struct radius_session *sess; | |
704 | struct radius_msg *reply; | |
7598210b | 705 | int is_complete = 0; |
6fc6879b JM |
706 | |
707 | if (force_sess) | |
708 | sess = force_sess; | |
709 | else { | |
710 | res = radius_msg_get_attr(msg, RADIUS_ATTR_STATE, statebuf, | |
711 | sizeof(statebuf)); | |
712 | state_included = res >= 0; | |
713 | if (res == sizeof(statebuf)) { | |
714 | state = WPA_GET_BE32(statebuf); | |
715 | sess = radius_server_get_session(client, state); | |
716 | } else { | |
717 | sess = NULL; | |
718 | } | |
719 | } | |
720 | ||
721 | if (sess) { | |
722 | RADIUS_DEBUG("Request for session 0x%x", sess->sess_id); | |
723 | } else if (state_included) { | |
724 | RADIUS_DEBUG("State attribute included but no session found"); | |
725 | radius_server_reject(data, client, msg, from, fromlen, | |
726 | from_addr, from_port); | |
727 | return -1; | |
728 | } else { | |
729 | sess = radius_server_get_new_session(data, client, msg); | |
730 | if (sess == NULL) { | |
731 | RADIUS_DEBUG("Could not create a new session"); | |
732 | radius_server_reject(data, client, msg, from, fromlen, | |
733 | from_addr, from_port); | |
734 | return -1; | |
735 | } | |
736 | } | |
737 | ||
738 | if (sess->last_from_port == from_port && | |
1489e11a JM |
739 | sess->last_identifier == radius_msg_get_hdr(msg)->identifier && |
740 | os_memcmp(sess->last_authenticator, | |
741 | radius_msg_get_hdr(msg)->authenticator, 16) == 0) { | |
6fc6879b JM |
742 | RADIUS_DEBUG("Duplicate message from %s", from_addr); |
743 | data->counters.dup_access_requests++; | |
744 | client->counters.dup_access_requests++; | |
745 | ||
746 | if (sess->last_reply) { | |
1489e11a JM |
747 | struct wpabuf *buf; |
748 | buf = radius_msg_get_buf(sess->last_reply); | |
749 | res = sendto(data->auth_sock, wpabuf_head(buf), | |
750 | wpabuf_len(buf), 0, | |
6fc6879b JM |
751 | (struct sockaddr *) from, fromlen); |
752 | if (res < 0) { | |
753 | perror("sendto[RADIUS SRV]"); | |
754 | } | |
755 | return 0; | |
756 | } | |
757 | ||
758 | RADIUS_DEBUG("No previous reply available for duplicate " | |
759 | "message"); | |
760 | return -1; | |
761 | } | |
762 | ||
763 | eap = radius_msg_get_eap(msg, &eap_len); | |
764 | if (eap == NULL) { | |
765 | RADIUS_DEBUG("No EAP-Message in RADIUS packet from %s", | |
766 | from_addr); | |
767 | data->counters.packets_dropped++; | |
768 | client->counters.packets_dropped++; | |
769 | return -1; | |
770 | } | |
771 | ||
772 | RADIUS_DUMP("Received EAP data", eap, eap_len); | |
773 | ||
774 | /* FIX: if Code is Request, Success, or Failure, send Access-Reject; | |
775 | * RFC3579 Sect. 2.6.2. | |
776 | * Include EAP-Response/Nak with no preferred method if | |
777 | * code == request. | |
778 | * If code is not 1-4, discard the packet silently. | |
779 | * Or is this already done by the EAP state machine? */ | |
780 | ||
781 | wpabuf_free(sess->eap_if->eapRespData); | |
782 | sess->eap_if->eapRespData = wpabuf_alloc_ext_data(eap, eap_len); | |
783 | if (sess->eap_if->eapRespData == NULL) | |
784 | os_free(eap); | |
785 | eap = NULL; | |
786 | sess->eap_if->eapResp = TRUE; | |
787 | eap_server_sm_step(sess->eap); | |
788 | ||
789 | if ((sess->eap_if->eapReq || sess->eap_if->eapSuccess || | |
790 | sess->eap_if->eapFail) && sess->eap_if->eapReqData) { | |
791 | RADIUS_DUMP("EAP data from the state machine", | |
792 | wpabuf_head(sess->eap_if->eapReqData), | |
793 | wpabuf_len(sess->eap_if->eapReqData)); | |
794 | } else if (sess->eap_if->eapFail) { | |
795 | RADIUS_DEBUG("No EAP data from the state machine, but eapFail " | |
796 | "set"); | |
797 | } else if (eap_sm_method_pending(sess->eap)) { | |
9e7245bd | 798 | radius_msg_free(sess->last_msg); |
6fc6879b JM |
799 | sess->last_msg = msg; |
800 | sess->last_from_port = from_port; | |
801 | os_free(sess->last_from_addr); | |
802 | sess->last_from_addr = os_strdup(from_addr); | |
803 | sess->last_fromlen = fromlen; | |
804 | os_memcpy(&sess->last_from, from, fromlen); | |
805 | return -2; | |
806 | } else { | |
807 | RADIUS_DEBUG("No EAP data from the state machine - ignore this" | |
808 | " Access-Request silently (assuming it was a " | |
809 | "duplicate)"); | |
810 | data->counters.packets_dropped++; | |
811 | client->counters.packets_dropped++; | |
812 | return -1; | |
813 | } | |
814 | ||
7598210b AB |
815 | if (sess->eap_if->eapSuccess || sess->eap_if->eapFail) |
816 | is_complete = 1; | |
817 | ||
6fc6879b JM |
818 | reply = radius_server_encapsulate_eap(data, client, sess, msg); |
819 | ||
820 | if (reply) { | |
1489e11a JM |
821 | struct wpabuf *buf; |
822 | struct radius_hdr *hdr; | |
823 | ||
6fc6879b JM |
824 | RADIUS_DEBUG("Reply to %s:%d", from_addr, from_port); |
825 | if (wpa_debug_level <= MSG_MSGDUMP) { | |
826 | radius_msg_dump(reply); | |
827 | } | |
828 | ||
1489e11a | 829 | switch (radius_msg_get_hdr(reply)->code) { |
6fc6879b JM |
830 | case RADIUS_CODE_ACCESS_ACCEPT: |
831 | data->counters.access_accepts++; | |
832 | client->counters.access_accepts++; | |
833 | break; | |
834 | case RADIUS_CODE_ACCESS_REJECT: | |
835 | data->counters.access_rejects++; | |
836 | client->counters.access_rejects++; | |
837 | break; | |
838 | case RADIUS_CODE_ACCESS_CHALLENGE: | |
839 | data->counters.access_challenges++; | |
840 | client->counters.access_challenges++; | |
841 | break; | |
842 | } | |
1489e11a JM |
843 | buf = radius_msg_get_buf(reply); |
844 | res = sendto(data->auth_sock, wpabuf_head(buf), | |
845 | wpabuf_len(buf), 0, | |
6fc6879b JM |
846 | (struct sockaddr *) from, fromlen); |
847 | if (res < 0) { | |
848 | perror("sendto[RADIUS SRV]"); | |
849 | } | |
9e7245bd | 850 | radius_msg_free(sess->last_reply); |
6fc6879b JM |
851 | sess->last_reply = reply; |
852 | sess->last_from_port = from_port; | |
1489e11a JM |
853 | hdr = radius_msg_get_hdr(msg); |
854 | sess->last_identifier = hdr->identifier; | |
855 | os_memcpy(sess->last_authenticator, hdr->authenticator, 16); | |
6fc6879b JM |
856 | } else { |
857 | data->counters.packets_dropped++; | |
858 | client->counters.packets_dropped++; | |
859 | } | |
860 | ||
7598210b | 861 | if (is_complete) { |
6fc6879b JM |
862 | RADIUS_DEBUG("Removing completed session 0x%x after timeout", |
863 | sess->sess_id); | |
864 | eloop_cancel_timeout(radius_server_session_remove_timeout, | |
865 | data, sess); | |
866 | eloop_register_timeout(10, 0, | |
867 | radius_server_session_remove_timeout, | |
868 | data, sess); | |
869 | } | |
870 | ||
871 | return 0; | |
872 | } | |
873 | ||
874 | ||
875 | static void radius_server_receive_auth(int sock, void *eloop_ctx, | |
876 | void *sock_ctx) | |
877 | { | |
878 | struct radius_server_data *data = eloop_ctx; | |
879 | u8 *buf = NULL; | |
5a641ae0 JM |
880 | union { |
881 | struct sockaddr_storage ss; | |
882 | struct sockaddr_in sin; | |
883 | #ifdef CONFIG_IPV6 | |
884 | struct sockaddr_in6 sin6; | |
885 | #endif /* CONFIG_IPV6 */ | |
886 | } from; | |
6fc6879b JM |
887 | socklen_t fromlen; |
888 | int len; | |
889 | struct radius_client *client = NULL; | |
890 | struct radius_msg *msg = NULL; | |
891 | char abuf[50]; | |
892 | int from_port = 0; | |
893 | ||
894 | buf = os_malloc(RADIUS_MAX_MSG_LEN); | |
895 | if (buf == NULL) { | |
896 | goto fail; | |
897 | } | |
898 | ||
899 | fromlen = sizeof(from); | |
900 | len = recvfrom(sock, buf, RADIUS_MAX_MSG_LEN, 0, | |
5a641ae0 | 901 | (struct sockaddr *) &from.ss, &fromlen); |
6fc6879b JM |
902 | if (len < 0) { |
903 | perror("recvfrom[radius_server]"); | |
904 | goto fail; | |
905 | } | |
906 | ||
907 | #ifdef CONFIG_IPV6 | |
908 | if (data->ipv6) { | |
5a641ae0 JM |
909 | if (inet_ntop(AF_INET6, &from.sin6.sin6_addr, abuf, |
910 | sizeof(abuf)) == NULL) | |
6fc6879b | 911 | abuf[0] = '\0'; |
5a641ae0 | 912 | from_port = ntohs(from.sin6.sin6_port); |
6fc6879b JM |
913 | RADIUS_DEBUG("Received %d bytes from %s:%d", |
914 | len, abuf, from_port); | |
915 | ||
916 | client = radius_server_get_client(data, | |
917 | (struct in_addr *) | |
5a641ae0 | 918 | &from.sin6.sin6_addr, 1); |
6fc6879b JM |
919 | } |
920 | #endif /* CONFIG_IPV6 */ | |
921 | ||
922 | if (!data->ipv6) { | |
5a641ae0 JM |
923 | os_strlcpy(abuf, inet_ntoa(from.sin.sin_addr), sizeof(abuf)); |
924 | from_port = ntohs(from.sin.sin_port); | |
6fc6879b JM |
925 | RADIUS_DEBUG("Received %d bytes from %s:%d", |
926 | len, abuf, from_port); | |
927 | ||
5a641ae0 | 928 | client = radius_server_get_client(data, &from.sin.sin_addr, 0); |
6fc6879b JM |
929 | } |
930 | ||
931 | RADIUS_DUMP("Received data", buf, len); | |
932 | ||
933 | if (client == NULL) { | |
934 | RADIUS_DEBUG("Unknown client %s - packet ignored", abuf); | |
935 | data->counters.invalid_requests++; | |
936 | goto fail; | |
937 | } | |
938 | ||
939 | msg = radius_msg_parse(buf, len); | |
940 | if (msg == NULL) { | |
941 | RADIUS_DEBUG("Parsing incoming RADIUS frame failed"); | |
942 | data->counters.malformed_access_requests++; | |
943 | client->counters.malformed_access_requests++; | |
944 | goto fail; | |
945 | } | |
946 | ||
947 | os_free(buf); | |
948 | buf = NULL; | |
949 | ||
950 | if (wpa_debug_level <= MSG_MSGDUMP) { | |
951 | radius_msg_dump(msg); | |
952 | } | |
953 | ||
1489e11a JM |
954 | if (radius_msg_get_hdr(msg)->code != RADIUS_CODE_ACCESS_REQUEST) { |
955 | RADIUS_DEBUG("Unexpected RADIUS code %d", | |
956 | radius_msg_get_hdr(msg)->code); | |
6fc6879b JM |
957 | data->counters.unknown_types++; |
958 | client->counters.unknown_types++; | |
959 | goto fail; | |
960 | } | |
961 | ||
962 | data->counters.access_requests++; | |
963 | client->counters.access_requests++; | |
964 | ||
965 | if (radius_msg_verify_msg_auth(msg, (u8 *) client->shared_secret, | |
966 | client->shared_secret_len, NULL)) { | |
967 | RADIUS_DEBUG("Invalid Message-Authenticator from %s", abuf); | |
968 | data->counters.bad_authenticators++; | |
969 | client->counters.bad_authenticators++; | |
970 | goto fail; | |
971 | } | |
972 | ||
973 | if (radius_server_request(data, msg, (struct sockaddr *) &from, | |
974 | fromlen, client, abuf, from_port, NULL) == | |
975 | -2) | |
976 | return; /* msg was stored with the session */ | |
977 | ||
978 | fail: | |
9e7245bd | 979 | radius_msg_free(msg); |
6fc6879b JM |
980 | os_free(buf); |
981 | } | |
982 | ||
983 | ||
5cd89c26 JM |
984 | static int radius_server_disable_pmtu_discovery(int s) |
985 | { | |
986 | int r = -1; | |
987 | #if defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DONT) | |
988 | /* Turn off Path MTU discovery on IPv4/UDP sockets. */ | |
989 | int action = IP_PMTUDISC_DONT; | |
990 | r = setsockopt(s, IPPROTO_IP, IP_MTU_DISCOVER, &action, | |
991 | sizeof(action)); | |
992 | if (r == -1) | |
993 | wpa_printf(MSG_ERROR, "Failed to set IP_MTU_DISCOVER: " | |
994 | "%s", strerror(errno)); | |
995 | #endif | |
996 | return r; | |
997 | } | |
998 | ||
999 | ||
6fc6879b JM |
1000 | static int radius_server_open_socket(int port) |
1001 | { | |
1002 | int s; | |
1003 | struct sockaddr_in addr; | |
1004 | ||
1005 | s = socket(PF_INET, SOCK_DGRAM, 0); | |
1006 | if (s < 0) { | |
1007 | perror("socket"); | |
1008 | return -1; | |
1009 | } | |
1010 | ||
5cd89c26 JM |
1011 | radius_server_disable_pmtu_discovery(s); |
1012 | ||
6fc6879b JM |
1013 | os_memset(&addr, 0, sizeof(addr)); |
1014 | addr.sin_family = AF_INET; | |
1015 | addr.sin_port = htons(port); | |
1016 | if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) { | |
1017 | perror("bind"); | |
1018 | close(s); | |
1019 | return -1; | |
1020 | } | |
1021 | ||
1022 | return s; | |
1023 | } | |
1024 | ||
1025 | ||
1026 | #ifdef CONFIG_IPV6 | |
1027 | static int radius_server_open_socket6(int port) | |
1028 | { | |
1029 | int s; | |
1030 | struct sockaddr_in6 addr; | |
1031 | ||
1032 | s = socket(PF_INET6, SOCK_DGRAM, 0); | |
1033 | if (s < 0) { | |
1034 | perror("socket[IPv6]"); | |
1035 | return -1; | |
1036 | } | |
1037 | ||
1038 | os_memset(&addr, 0, sizeof(addr)); | |
1039 | addr.sin6_family = AF_INET6; | |
1040 | os_memcpy(&addr.sin6_addr, &in6addr_any, sizeof(in6addr_any)); | |
1041 | addr.sin6_port = htons(port); | |
1042 | if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) { | |
1043 | perror("bind"); | |
1044 | close(s); | |
1045 | return -1; | |
1046 | } | |
1047 | ||
1048 | return s; | |
1049 | } | |
1050 | #endif /* CONFIG_IPV6 */ | |
1051 | ||
1052 | ||
1053 | static void radius_server_free_sessions(struct radius_server_data *data, | |
1054 | struct radius_session *sessions) | |
1055 | { | |
1056 | struct radius_session *session, *prev; | |
1057 | ||
1058 | session = sessions; | |
1059 | while (session) { | |
1060 | prev = session; | |
1061 | session = session->next; | |
1062 | radius_server_session_free(data, prev); | |
1063 | } | |
1064 | } | |
1065 | ||
1066 | ||
1067 | static void radius_server_free_clients(struct radius_server_data *data, | |
1068 | struct radius_client *clients) | |
1069 | { | |
1070 | struct radius_client *client, *prev; | |
1071 | ||
1072 | client = clients; | |
1073 | while (client) { | |
1074 | prev = client; | |
1075 | client = client->next; | |
1076 | ||
1077 | radius_server_free_sessions(data, prev->sessions); | |
1078 | os_free(prev->shared_secret); | |
1079 | os_free(prev); | |
1080 | } | |
1081 | } | |
1082 | ||
1083 | ||
1084 | static struct radius_client * | |
1085 | radius_server_read_clients(const char *client_file, int ipv6) | |
1086 | { | |
1087 | FILE *f; | |
1088 | const int buf_size = 1024; | |
1089 | char *buf, *pos; | |
1090 | struct radius_client *clients, *tail, *entry; | |
1091 | int line = 0, mask, failed = 0, i; | |
1092 | struct in_addr addr; | |
1093 | #ifdef CONFIG_IPV6 | |
1094 | struct in6_addr addr6; | |
1095 | #endif /* CONFIG_IPV6 */ | |
1096 | unsigned int val; | |
1097 | ||
1098 | f = fopen(client_file, "r"); | |
1099 | if (f == NULL) { | |
1100 | RADIUS_ERROR("Could not open client file '%s'", client_file); | |
1101 | return NULL; | |
1102 | } | |
1103 | ||
1104 | buf = os_malloc(buf_size); | |
1105 | if (buf == NULL) { | |
1106 | fclose(f); | |
1107 | return NULL; | |
1108 | } | |
1109 | ||
1110 | clients = tail = NULL; | |
1111 | while (fgets(buf, buf_size, f)) { | |
1112 | /* Configuration file format: | |
1113 | * 192.168.1.0/24 secret | |
1114 | * 192.168.1.2 secret | |
1115 | * fe80::211:22ff:fe33:4455/64 secretipv6 | |
1116 | */ | |
1117 | line++; | |
1118 | buf[buf_size - 1] = '\0'; | |
1119 | pos = buf; | |
1120 | while (*pos != '\0' && *pos != '\n') | |
1121 | pos++; | |
1122 | if (*pos == '\n') | |
1123 | *pos = '\0'; | |
1124 | if (*buf == '\0' || *buf == '#') | |
1125 | continue; | |
1126 | ||
1127 | pos = buf; | |
1128 | while ((*pos >= '0' && *pos <= '9') || *pos == '.' || | |
1129 | (*pos >= 'a' && *pos <= 'f') || *pos == ':' || | |
1130 | (*pos >= 'A' && *pos <= 'F')) { | |
1131 | pos++; | |
1132 | } | |
1133 | ||
1134 | if (*pos == '\0') { | |
1135 | failed = 1; | |
1136 | break; | |
1137 | } | |
1138 | ||
1139 | if (*pos == '/') { | |
1140 | char *end; | |
1141 | *pos++ = '\0'; | |
1142 | mask = strtol(pos, &end, 10); | |
1143 | if ((pos == end) || | |
1144 | (mask < 0 || mask > (ipv6 ? 128 : 32))) { | |
1145 | failed = 1; | |
1146 | break; | |
1147 | } | |
1148 | pos = end; | |
1149 | } else { | |
1150 | mask = ipv6 ? 128 : 32; | |
1151 | *pos++ = '\0'; | |
1152 | } | |
1153 | ||
1154 | if (!ipv6 && inet_aton(buf, &addr) == 0) { | |
1155 | failed = 1; | |
1156 | break; | |
1157 | } | |
1158 | #ifdef CONFIG_IPV6 | |
1159 | if (ipv6 && inet_pton(AF_INET6, buf, &addr6) <= 0) { | |
1160 | if (inet_pton(AF_INET, buf, &addr) <= 0) { | |
1161 | failed = 1; | |
1162 | break; | |
1163 | } | |
1164 | /* Convert IPv4 address to IPv6 */ | |
1165 | if (mask <= 32) | |
1166 | mask += (128 - 32); | |
1167 | os_memset(addr6.s6_addr, 0, 10); | |
1168 | addr6.s6_addr[10] = 0xff; | |
1169 | addr6.s6_addr[11] = 0xff; | |
1170 | os_memcpy(addr6.s6_addr + 12, (char *) &addr.s_addr, | |
1171 | 4); | |
1172 | } | |
1173 | #endif /* CONFIG_IPV6 */ | |
1174 | ||
1175 | while (*pos == ' ' || *pos == '\t') { | |
1176 | pos++; | |
1177 | } | |
1178 | ||
1179 | if (*pos == '\0') { | |
1180 | failed = 1; | |
1181 | break; | |
1182 | } | |
1183 | ||
1184 | entry = os_zalloc(sizeof(*entry)); | |
1185 | if (entry == NULL) { | |
1186 | failed = 1; | |
1187 | break; | |
1188 | } | |
1189 | entry->shared_secret = os_strdup(pos); | |
1190 | if (entry->shared_secret == NULL) { | |
1191 | failed = 1; | |
1192 | os_free(entry); | |
1193 | break; | |
1194 | } | |
1195 | entry->shared_secret_len = os_strlen(entry->shared_secret); | |
1196 | entry->addr.s_addr = addr.s_addr; | |
1197 | if (!ipv6) { | |
1198 | val = 0; | |
1199 | for (i = 0; i < mask; i++) | |
1200 | val |= 1 << (31 - i); | |
1201 | entry->mask.s_addr = htonl(val); | |
1202 | } | |
1203 | #ifdef CONFIG_IPV6 | |
1204 | if (ipv6) { | |
1205 | int offset = mask / 8; | |
1206 | ||
1207 | os_memcpy(entry->addr6.s6_addr, addr6.s6_addr, 16); | |
1208 | os_memset(entry->mask6.s6_addr, 0xff, offset); | |
1209 | val = 0; | |
1210 | for (i = 0; i < (mask % 8); i++) | |
1211 | val |= 1 << (7 - i); | |
1212 | if (offset < 16) | |
1213 | entry->mask6.s6_addr[offset] = val; | |
1214 | } | |
1215 | #endif /* CONFIG_IPV6 */ | |
1216 | ||
1217 | if (tail == NULL) { | |
1218 | clients = tail = entry; | |
1219 | } else { | |
1220 | tail->next = entry; | |
1221 | tail = entry; | |
1222 | } | |
1223 | } | |
1224 | ||
1225 | if (failed) { | |
1226 | RADIUS_ERROR("Invalid line %d in '%s'", line, client_file); | |
1227 | radius_server_free_clients(NULL, clients); | |
1228 | clients = NULL; | |
1229 | } | |
1230 | ||
1231 | os_free(buf); | |
1232 | fclose(f); | |
1233 | ||
1234 | return clients; | |
1235 | } | |
1236 | ||
1237 | ||
362bd35f JM |
1238 | /** |
1239 | * radius_server_init - Initialize RADIUS server | |
1240 | * @conf: Configuration for the RADIUS server | |
1241 | * Returns: Pointer to private RADIUS server context or %NULL on failure | |
1242 | * | |
1243 | * This initializes a RADIUS server instance and returns a context pointer that | |
1244 | * will be used in other calls to the RADIUS server module. The server can be | |
1245 | * deinitialize by calling radius_server_deinit(). | |
1246 | */ | |
6fc6879b JM |
1247 | struct radius_server_data * |
1248 | radius_server_init(struct radius_server_conf *conf) | |
1249 | { | |
1250 | struct radius_server_data *data; | |
1251 | ||
1252 | #ifndef CONFIG_IPV6 | |
1253 | if (conf->ipv6) { | |
1254 | fprintf(stderr, "RADIUS server compiled without IPv6 " | |
1255 | "support.\n"); | |
1256 | return NULL; | |
1257 | } | |
1258 | #endif /* CONFIG_IPV6 */ | |
1259 | ||
1260 | data = os_zalloc(sizeof(*data)); | |
1261 | if (data == NULL) | |
1262 | return NULL; | |
1263 | ||
1264 | os_get_time(&data->start_time); | |
1265 | data->conf_ctx = conf->conf_ctx; | |
1266 | data->eap_sim_db_priv = conf->eap_sim_db_priv; | |
1267 | data->ssl_ctx = conf->ssl_ctx; | |
bb437f28 | 1268 | data->msg_ctx = conf->msg_ctx; |
6fc6879b JM |
1269 | data->ipv6 = conf->ipv6; |
1270 | if (conf->pac_opaque_encr_key) { | |
1271 | data->pac_opaque_encr_key = os_malloc(16); | |
1272 | os_memcpy(data->pac_opaque_encr_key, conf->pac_opaque_encr_key, | |
1273 | 16); | |
1274 | } | |
2d867244 JM |
1275 | if (conf->eap_fast_a_id) { |
1276 | data->eap_fast_a_id = os_malloc(conf->eap_fast_a_id_len); | |
1277 | if (data->eap_fast_a_id) { | |
1278 | os_memcpy(data->eap_fast_a_id, conf->eap_fast_a_id, | |
1279 | conf->eap_fast_a_id_len); | |
1280 | data->eap_fast_a_id_len = conf->eap_fast_a_id_len; | |
1281 | } | |
1282 | } | |
1283 | if (conf->eap_fast_a_id_info) | |
1284 | data->eap_fast_a_id_info = os_strdup(conf->eap_fast_a_id_info); | |
378eae5e | 1285 | data->eap_fast_prov = conf->eap_fast_prov; |
a11c90a6 JM |
1286 | data->pac_key_lifetime = conf->pac_key_lifetime; |
1287 | data->pac_key_refresh_time = conf->pac_key_refresh_time; | |
6fc6879b JM |
1288 | data->get_eap_user = conf->get_eap_user; |
1289 | data->eap_sim_aka_result_ind = conf->eap_sim_aka_result_ind; | |
c3e258ae | 1290 | data->tnc = conf->tnc; |
ad08c363 | 1291 | data->wps = conf->wps; |
df684d82 | 1292 | data->pwd_group = conf->pwd_group; |
65d50f0a JM |
1293 | if (conf->eap_req_id_text) { |
1294 | data->eap_req_id_text = os_malloc(conf->eap_req_id_text_len); | |
1295 | if (data->eap_req_id_text) { | |
1296 | os_memcpy(data->eap_req_id_text, conf->eap_req_id_text, | |
1297 | conf->eap_req_id_text_len); | |
1298 | data->eap_req_id_text_len = conf->eap_req_id_text_len; | |
1299 | } | |
1300 | } | |
6fc6879b | 1301 | |
505a3694 JM |
1302 | #ifdef CONFIG_RADIUS_TEST |
1303 | if (conf->dump_msk_file) | |
1304 | data->dump_msk_file = os_strdup(conf->dump_msk_file); | |
1305 | #endif /* CONFIG_RADIUS_TEST */ | |
1306 | ||
6fc6879b JM |
1307 | data->clients = radius_server_read_clients(conf->client_file, |
1308 | conf->ipv6); | |
1309 | if (data->clients == NULL) { | |
1310 | printf("No RADIUS clients configured.\n"); | |
1311 | radius_server_deinit(data); | |
1312 | return NULL; | |
1313 | } | |
1314 | ||
1315 | #ifdef CONFIG_IPV6 | |
1316 | if (conf->ipv6) | |
1317 | data->auth_sock = radius_server_open_socket6(conf->auth_port); | |
1318 | else | |
1319 | #endif /* CONFIG_IPV6 */ | |
1320 | data->auth_sock = radius_server_open_socket(conf->auth_port); | |
1321 | if (data->auth_sock < 0) { | |
1322 | printf("Failed to open UDP socket for RADIUS authentication " | |
1323 | "server\n"); | |
1324 | radius_server_deinit(data); | |
1325 | return NULL; | |
1326 | } | |
1327 | if (eloop_register_read_sock(data->auth_sock, | |
1328 | radius_server_receive_auth, | |
1329 | data, NULL)) { | |
1330 | radius_server_deinit(data); | |
1331 | return NULL; | |
1332 | } | |
1333 | ||
1334 | return data; | |
1335 | } | |
1336 | ||
1337 | ||
362bd35f JM |
1338 | /** |
1339 | * radius_server_deinit - Deinitialize RADIUS server | |
1340 | * @data: RADIUS server context from radius_server_init() | |
1341 | */ | |
6fc6879b JM |
1342 | void radius_server_deinit(struct radius_server_data *data) |
1343 | { | |
1344 | if (data == NULL) | |
1345 | return; | |
1346 | ||
1347 | if (data->auth_sock >= 0) { | |
1348 | eloop_unregister_read_sock(data->auth_sock); | |
1349 | close(data->auth_sock); | |
1350 | } | |
1351 | ||
1352 | radius_server_free_clients(data, data->clients); | |
1353 | ||
1354 | os_free(data->pac_opaque_encr_key); | |
1355 | os_free(data->eap_fast_a_id); | |
2d867244 | 1356 | os_free(data->eap_fast_a_id_info); |
65d50f0a | 1357 | os_free(data->eap_req_id_text); |
505a3694 JM |
1358 | #ifdef CONFIG_RADIUS_TEST |
1359 | os_free(data->dump_msk_file); | |
1360 | #endif /* CONFIG_RADIUS_TEST */ | |
6fc6879b JM |
1361 | os_free(data); |
1362 | } | |
1363 | ||
1364 | ||
362bd35f JM |
1365 | /** |
1366 | * radius_server_get_mib - Get RADIUS server MIB information | |
1367 | * @data: RADIUS server context from radius_server_init() | |
1368 | * @buf: Buffer for returning the MIB data in text format | |
1369 | * @buflen: buf length in octets | |
1370 | * Returns: Number of octets written into buf | |
1371 | */ | |
6fc6879b JM |
1372 | int radius_server_get_mib(struct radius_server_data *data, char *buf, |
1373 | size_t buflen) | |
1374 | { | |
1375 | int ret, uptime; | |
1376 | unsigned int idx; | |
1377 | char *end, *pos; | |
1378 | struct os_time now; | |
1379 | struct radius_client *cli; | |
1380 | ||
1381 | /* RFC 2619 - RADIUS Authentication Server MIB */ | |
1382 | ||
1383 | if (data == NULL || buflen == 0) | |
1384 | return 0; | |
1385 | ||
1386 | pos = buf; | |
1387 | end = buf + buflen; | |
1388 | ||
1389 | os_get_time(&now); | |
1390 | uptime = (now.sec - data->start_time.sec) * 100 + | |
1391 | ((now.usec - data->start_time.usec) / 10000) % 100; | |
1392 | ret = os_snprintf(pos, end - pos, | |
1393 | "RADIUS-AUTH-SERVER-MIB\n" | |
1394 | "radiusAuthServIdent=hostapd\n" | |
1395 | "radiusAuthServUpTime=%d\n" | |
1396 | "radiusAuthServResetTime=0\n" | |
1397 | "radiusAuthServConfigReset=4\n", | |
1398 | uptime); | |
1399 | if (ret < 0 || ret >= end - pos) { | |
1400 | *pos = '\0'; | |
1401 | return pos - buf; | |
1402 | } | |
1403 | pos += ret; | |
1404 | ||
1405 | ret = os_snprintf(pos, end - pos, | |
1406 | "radiusAuthServTotalAccessRequests=%u\n" | |
1407 | "radiusAuthServTotalInvalidRequests=%u\n" | |
1408 | "radiusAuthServTotalDupAccessRequests=%u\n" | |
1409 | "radiusAuthServTotalAccessAccepts=%u\n" | |
1410 | "radiusAuthServTotalAccessRejects=%u\n" | |
1411 | "radiusAuthServTotalAccessChallenges=%u\n" | |
1412 | "radiusAuthServTotalMalformedAccessRequests=%u\n" | |
1413 | "radiusAuthServTotalBadAuthenticators=%u\n" | |
1414 | "radiusAuthServTotalPacketsDropped=%u\n" | |
1415 | "radiusAuthServTotalUnknownTypes=%u\n", | |
1416 | data->counters.access_requests, | |
1417 | data->counters.invalid_requests, | |
1418 | data->counters.dup_access_requests, | |
1419 | data->counters.access_accepts, | |
1420 | data->counters.access_rejects, | |
1421 | data->counters.access_challenges, | |
1422 | data->counters.malformed_access_requests, | |
1423 | data->counters.bad_authenticators, | |
1424 | data->counters.packets_dropped, | |
1425 | data->counters.unknown_types); | |
1426 | if (ret < 0 || ret >= end - pos) { | |
1427 | *pos = '\0'; | |
1428 | return pos - buf; | |
1429 | } | |
1430 | pos += ret; | |
1431 | ||
1432 | for (cli = data->clients, idx = 0; cli; cli = cli->next, idx++) { | |
1433 | char abuf[50], mbuf[50]; | |
1434 | #ifdef CONFIG_IPV6 | |
1435 | if (data->ipv6) { | |
1436 | if (inet_ntop(AF_INET6, &cli->addr6, abuf, | |
1437 | sizeof(abuf)) == NULL) | |
1438 | abuf[0] = '\0'; | |
1439 | if (inet_ntop(AF_INET6, &cli->mask6, abuf, | |
1440 | sizeof(mbuf)) == NULL) | |
1441 | mbuf[0] = '\0'; | |
1442 | } | |
1443 | #endif /* CONFIG_IPV6 */ | |
1444 | if (!data->ipv6) { | |
1445 | os_strlcpy(abuf, inet_ntoa(cli->addr), sizeof(abuf)); | |
1446 | os_strlcpy(mbuf, inet_ntoa(cli->mask), sizeof(mbuf)); | |
1447 | } | |
1448 | ||
1449 | ret = os_snprintf(pos, end - pos, | |
1450 | "radiusAuthClientIndex=%u\n" | |
1451 | "radiusAuthClientAddress=%s/%s\n" | |
1452 | "radiusAuthServAccessRequests=%u\n" | |
1453 | "radiusAuthServDupAccessRequests=%u\n" | |
1454 | "radiusAuthServAccessAccepts=%u\n" | |
1455 | "radiusAuthServAccessRejects=%u\n" | |
1456 | "radiusAuthServAccessChallenges=%u\n" | |
1457 | "radiusAuthServMalformedAccessRequests=%u\n" | |
1458 | "radiusAuthServBadAuthenticators=%u\n" | |
1459 | "radiusAuthServPacketsDropped=%u\n" | |
1460 | "radiusAuthServUnknownTypes=%u\n", | |
1461 | idx, | |
1462 | abuf, mbuf, | |
1463 | cli->counters.access_requests, | |
1464 | cli->counters.dup_access_requests, | |
1465 | cli->counters.access_accepts, | |
1466 | cli->counters.access_rejects, | |
1467 | cli->counters.access_challenges, | |
1468 | cli->counters.malformed_access_requests, | |
1469 | cli->counters.bad_authenticators, | |
1470 | cli->counters.packets_dropped, | |
1471 | cli->counters.unknown_types); | |
1472 | if (ret < 0 || ret >= end - pos) { | |
1473 | *pos = '\0'; | |
1474 | return pos - buf; | |
1475 | } | |
1476 | pos += ret; | |
1477 | } | |
1478 | ||
1479 | return pos - buf; | |
1480 | } | |
1481 | ||
1482 | ||
1483 | static int radius_server_get_eap_user(void *ctx, const u8 *identity, | |
1484 | size_t identity_len, int phase2, | |
1485 | struct eap_user *user) | |
1486 | { | |
1487 | struct radius_session *sess = ctx; | |
1488 | struct radius_server_data *data = sess->server; | |
1489 | ||
1490 | return data->get_eap_user(data->conf_ctx, identity, identity_len, | |
1491 | phase2, user); | |
1492 | } | |
1493 | ||
1494 | ||
65d50f0a JM |
1495 | static const char * radius_server_get_eap_req_id_text(void *ctx, size_t *len) |
1496 | { | |
1497 | struct radius_session *sess = ctx; | |
1498 | struct radius_server_data *data = sess->server; | |
1499 | *len = data->eap_req_id_text_len; | |
1500 | return data->eap_req_id_text; | |
1501 | } | |
1502 | ||
1503 | ||
6fc6879b JM |
1504 | static struct eapol_callbacks radius_server_eapol_cb = |
1505 | { | |
1506 | .get_eap_user = radius_server_get_eap_user, | |
65d50f0a | 1507 | .get_eap_req_id_text = radius_server_get_eap_req_id_text, |
6fc6879b JM |
1508 | }; |
1509 | ||
1510 | ||
362bd35f JM |
1511 | /** |
1512 | * radius_server_eap_pending_cb - Pending EAP data notification | |
1513 | * @data: RADIUS server context from radius_server_init() | |
1514 | * @ctx: Pending EAP context pointer | |
1515 | * | |
1516 | * This function is used to notify EAP server module that a pending operation | |
1517 | * has been completed and processing of the EAP session can proceed. | |
1518 | */ | |
6fc6879b JM |
1519 | void radius_server_eap_pending_cb(struct radius_server_data *data, void *ctx) |
1520 | { | |
1521 | struct radius_client *cli; | |
1522 | struct radius_session *s, *sess = NULL; | |
1523 | struct radius_msg *msg; | |
1524 | ||
1525 | if (data == NULL) | |
1526 | return; | |
1527 | ||
1528 | for (cli = data->clients; cli; cli = cli->next) { | |
1529 | for (s = cli->sessions; s; s = s->next) { | |
1530 | if (s->eap == ctx && s->last_msg) { | |
1531 | sess = s; | |
1532 | break; | |
1533 | } | |
1534 | if (sess) | |
1535 | break; | |
1536 | } | |
1537 | if (sess) | |
1538 | break; | |
1539 | } | |
1540 | ||
1541 | if (sess == NULL) { | |
1542 | RADIUS_DEBUG("No session matched callback ctx"); | |
1543 | return; | |
1544 | } | |
1545 | ||
1546 | msg = sess->last_msg; | |
1547 | sess->last_msg = NULL; | |
1548 | eap_sm_pending_cb(sess->eap); | |
1549 | if (radius_server_request(data, msg, | |
1550 | (struct sockaddr *) &sess->last_from, | |
1551 | sess->last_fromlen, cli, | |
1552 | sess->last_from_addr, | |
1553 | sess->last_from_port, sess) == -2) | |
1554 | return; /* msg was stored with the session */ | |
1555 | ||
1556 | radius_msg_free(msg); | |
6fc6879b | 1557 | } |