2 * RADIUS authentication server
3 * Copyright (c) 2005-2009, Jouni Malinen <j@w1.fi>
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.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
21 #include "eap_server/eap.h"
22 #include "radius_server.h"
25 * RADIUS_SESSION_TIMEOUT - Session timeout in seconds
27 #define RADIUS_SESSION_TIMEOUT 60
30 * RADIUS_MAX_SESSION - Maximum number of active sessions
32 #define RADIUS_MAX_SESSION 100
35 * RADIUS_MAX_MSG_LEN - Maximum message length for incoming RADIUS messages
37 #define RADIUS_MAX_MSG_LEN 3000
39 static struct eapol_callbacks radius_server_eapol_cb;
42 struct radius_server_data;
45 * struct radius_server_counters - RADIUS server statistics counters
47 struct radius_server_counters {
50 u32 dup_access_requests;
53 u32 access_challenges;
54 u32 malformed_access_requests;
55 u32 bad_authenticators;
61 * struct radius_session - Internal RADIUS server data for a session
63 struct radius_session {
64 struct radius_session *next;
65 struct radius_client *client;
66 struct radius_server_data *server;
69 struct eap_eapol_interface *eap_if;
71 struct radius_msg *last_msg;
74 struct sockaddr_storage last_from;
75 socklen_t last_fromlen;
77 struct radius_msg *last_reply;
78 u8 last_authenticator[16];
82 * struct radius_client - Internal RADIUS server data for a client
84 struct radius_client {
85 struct radius_client *next;
89 struct in6_addr addr6;
90 struct in6_addr mask6;
91 #endif /* CONFIG_IPV6 */
93 int shared_secret_len;
94 struct radius_session *sessions;
95 struct radius_server_counters counters;
99 * struct radius_server_data - Internal RADIUS server data
101 struct radius_server_data {
103 * auth_sock - Socket for RADIUS authentication messages
108 * clients - List of authorized RADIUS clients
110 struct radius_client *clients;
113 * next_sess_id - Next session identifier
115 unsigned int next_sess_id;
118 * conf_ctx - Context pointer for callbacks
120 * This is used as the ctx argument in get_eap_user() calls.
125 * num_sess - Number of active sessions
130 * eap_sim_db_priv - EAP-SIM/AKA database context
132 * This is passed to the EAP-SIM/AKA server implementation as a
135 void *eap_sim_db_priv;
138 * ssl_ctx - TLS context
140 * This is passed to the EAP server implementation as a callback
141 * context for TLS operations.
146 * pac_opaque_encr_key - PAC-Opaque encryption key for EAP-FAST
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.
152 u8 *pac_opaque_encr_key;
155 * eap_fast_a_id - EAP-FAST authority identity (A-ID)
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.
166 * eap_fast_a_id_len - Length of eap_fast_a_id buffer in octets
168 size_t eap_fast_a_id_len;
171 * eap_fast_a_id_info - EAP-FAST authority identifier information
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.
178 char *eap_fast_a_id_info;
181 * eap_fast_prov - EAP-FAST provisioning modes
183 * 0 = provisioning disabled, 1 = only anonymous provisioning allowed,
184 * 2 = only authenticated provisioning allowed, 3 = both provisioning
190 * pac_key_lifetime - EAP-FAST PAC-Key lifetime in seconds
192 * This is the hard limit on how long a provisioned PAC-Key can be
195 int pac_key_lifetime;
198 * pac_key_refresh_time - EAP-FAST PAC-Key refresh time in seconds
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
204 int pac_key_refresh_time;
207 * eap_sim_aka_result_ind - EAP-SIM/AKA protected success indication
209 * This controls whether the protected success/failure indication
210 * (AT_RESULT_IND) is used with EAP-SIM and EAP-AKA.
212 int eap_sim_aka_result_ind;
215 * tnc - Trusted Network Connect (TNC)
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.
225 * wps - Wi-Fi Protected Setup context
227 * If WPS is used with an external RADIUS server (which is quite
228 * unlikely configuration), this is used to provide a pointer to WPS
229 * context data. Normally, this can be set to %NULL.
231 struct wps_context *wps;
234 * ipv6 - Whether to enable IPv6 support in the RADIUS server
239 * start_time - Timestamp of server start
241 struct os_time start_time;
244 * counters - Statistics counters for server operations
246 * These counters are the sum over all clients.
248 struct radius_server_counters counters;
251 * get_eap_user - Callback for fetching EAP user information
252 * @ctx: Context data from conf_ctx
253 * @identity: User identity
254 * @identity_len: identity buffer length in octets
255 * @phase2: Whether this is for Phase 2 identity
256 * @user: Data structure for filling in the user information
257 * Returns: 0 on success, -1 on failure
259 * This is used to fetch information from user database. The callback
260 * will fill in information about allowed EAP methods and the user
261 * password. The password field will be an allocated copy of the
262 * password data and RADIUS server will free it after use.
264 int (*get_eap_user)(void *ctx, const u8 *identity, size_t identity_len,
265 int phase2, struct eap_user *user);
268 * eap_req_id_text - Optional data for EAP-Request/Identity
270 * This can be used to configure an optional, displayable message that
271 * will be sent in EAP-Request/Identity. This string can contain an
272 * ASCII-0 character (nul) to separate network infromation per RFC
273 * 4284. The actual string length is explicit provided in
274 * eap_req_id_text_len since nul character will not be used as a string
277 char *eap_req_id_text;
280 * eap_req_id_text_len - Length of eap_req_id_text buffer in octets
282 size_t eap_req_id_text_len;
286 extern int wpa_debug_level;
288 #define RADIUS_DEBUG(args...) \
289 wpa_printf(MSG_DEBUG, "RADIUS SRV: " args)
290 #define RADIUS_ERROR(args...) \
291 wpa_printf(MSG_ERROR, "RADIUS SRV: " args)
292 #define RADIUS_DUMP(args...) \
293 wpa_hexdump(MSG_MSGDUMP, "RADIUS SRV: " args)
294 #define RADIUS_DUMP_ASCII(args...) \
295 wpa_hexdump_ascii(MSG_MSGDUMP, "RADIUS SRV: " args)
298 static void radius_server_session_timeout(void *eloop_ctx, void *timeout_ctx);
302 static struct radius_client *
303 radius_server_get_client(struct radius_server_data *data, struct in_addr *addr,
306 struct radius_client *client = data->clients;
311 struct in6_addr *addr6;
314 addr6 = (struct in6_addr *) addr;
315 for (i = 0; i < 16; i++) {
316 if ((addr6->s6_addr[i] &
317 client->mask6.s6_addr[i]) !=
318 (client->addr6.s6_addr[i] &
319 client->mask6.s6_addr[i])) {
328 #endif /* CONFIG_IPV6 */
329 if (!ipv6 && (client->addr.s_addr & client->mask.s_addr) ==
330 (addr->s_addr & client->mask.s_addr)) {
334 client = client->next;
341 static struct radius_session *
342 radius_server_get_session(struct radius_client *client, unsigned int sess_id)
344 struct radius_session *sess = client->sessions;
347 if (sess->sess_id == sess_id) {
357 static void radius_server_session_free(struct radius_server_data *data,
358 struct radius_session *sess)
360 eloop_cancel_timeout(radius_server_session_timeout, data, sess);
361 eap_server_sm_deinit(sess->eap);
362 radius_msg_free(sess->last_msg);
363 os_free(sess->last_from_addr);
364 radius_msg_free(sess->last_reply);
370 static void radius_server_session_remove_timeout(void *eloop_ctx,
373 static void radius_server_session_remove(struct radius_server_data *data,
374 struct radius_session *sess)
376 struct radius_client *client = sess->client;
377 struct radius_session *session, *prev;
379 eloop_cancel_timeout(radius_server_session_remove_timeout, data, sess);
382 session = client->sessions;
384 if (session == sess) {
386 client->sessions = sess->next;
388 prev->next = sess->next;
390 radius_server_session_free(data, sess);
394 session = session->next;
399 static void radius_server_session_remove_timeout(void *eloop_ctx,
402 struct radius_server_data *data = eloop_ctx;
403 struct radius_session *sess = timeout_ctx;
404 RADIUS_DEBUG("Removing completed session 0x%x", sess->sess_id);
405 radius_server_session_remove(data, sess);
409 static void radius_server_session_timeout(void *eloop_ctx, void *timeout_ctx)
411 struct radius_server_data *data = eloop_ctx;
412 struct radius_session *sess = timeout_ctx;
414 RADIUS_DEBUG("Timing out authentication session 0x%x", sess->sess_id);
415 radius_server_session_remove(data, sess);
419 static struct radius_session *
420 radius_server_new_session(struct radius_server_data *data,
421 struct radius_client *client)
423 struct radius_session *sess;
425 if (data->num_sess >= RADIUS_MAX_SESSION) {
426 RADIUS_DEBUG("Maximum number of existing session - no room "
427 "for a new session");
431 sess = os_zalloc(sizeof(*sess));
436 sess->client = client;
437 sess->sess_id = data->next_sess_id++;
438 sess->next = client->sessions;
439 client->sessions = sess;
440 eloop_register_timeout(RADIUS_SESSION_TIMEOUT, 0,
441 radius_server_session_timeout, data, sess);
447 static struct radius_session *
448 radius_server_get_new_session(struct radius_server_data *data,
449 struct radius_client *client,
450 struct radius_msg *msg)
455 struct radius_session *sess;
456 struct eap_config eap_conf;
458 RADIUS_DEBUG("Creating a new session");
460 user = os_malloc(256);
464 res = radius_msg_get_attr(msg, RADIUS_ATTR_USER_NAME, user, 256);
465 if (res < 0 || res > 256) {
466 RADIUS_DEBUG("Could not get User-Name");
471 RADIUS_DUMP_ASCII("User-Name", user, user_len);
473 res = data->get_eap_user(data->conf_ctx, user, user_len, 0, NULL);
477 RADIUS_DEBUG("Matching user entry found");
478 sess = radius_server_new_session(data, client);
480 RADIUS_DEBUG("Failed to create a new session");
484 RADIUS_DEBUG("User-Name not found from user database");
488 os_memset(&eap_conf, 0, sizeof(eap_conf));
489 eap_conf.ssl_ctx = data->ssl_ctx;
490 eap_conf.eap_sim_db_priv = data->eap_sim_db_priv;
491 eap_conf.backend_auth = TRUE;
492 eap_conf.eap_server = 1;
493 eap_conf.pac_opaque_encr_key = data->pac_opaque_encr_key;
494 eap_conf.eap_fast_a_id = data->eap_fast_a_id;
495 eap_conf.eap_fast_a_id_len = data->eap_fast_a_id_len;
496 eap_conf.eap_fast_a_id_info = data->eap_fast_a_id_info;
497 eap_conf.eap_fast_prov = data->eap_fast_prov;
498 eap_conf.pac_key_lifetime = data->pac_key_lifetime;
499 eap_conf.pac_key_refresh_time = data->pac_key_refresh_time;
500 eap_conf.eap_sim_aka_result_ind = data->eap_sim_aka_result_ind;
501 eap_conf.tnc = data->tnc;
502 eap_conf.wps = data->wps;
503 sess->eap = eap_server_sm_init(sess, &radius_server_eapol_cb,
505 if (sess->eap == NULL) {
506 RADIUS_DEBUG("Failed to initialize EAP state machine for the "
508 radius_server_session_free(data, sess);
511 sess->eap_if = eap_get_interface(sess->eap);
512 sess->eap_if->eapRestart = TRUE;
513 sess->eap_if->portEnabled = TRUE;
515 RADIUS_DEBUG("New session 0x%x initialized", sess->sess_id);
521 static struct radius_msg *
522 radius_server_encapsulate_eap(struct radius_server_data *data,
523 struct radius_client *client,
524 struct radius_session *sess,
525 struct radius_msg *request)
527 struct radius_msg *msg;
529 unsigned int sess_id;
530 struct radius_hdr *hdr = radius_msg_get_hdr(request);
532 if (sess->eap_if->eapFail) {
533 sess->eap_if->eapFail = FALSE;
534 code = RADIUS_CODE_ACCESS_REJECT;
535 } else if (sess->eap_if->eapSuccess) {
536 sess->eap_if->eapSuccess = FALSE;
537 code = RADIUS_CODE_ACCESS_ACCEPT;
539 sess->eap_if->eapReq = FALSE;
540 code = RADIUS_CODE_ACCESS_CHALLENGE;
543 msg = radius_msg_new(code, hdr->identifier);
545 RADIUS_DEBUG("Failed to allocate reply message");
549 sess_id = htonl(sess->sess_id);
550 if (code == RADIUS_CODE_ACCESS_CHALLENGE &&
551 !radius_msg_add_attr(msg, RADIUS_ATTR_STATE,
552 (u8 *) &sess_id, sizeof(sess_id))) {
553 RADIUS_DEBUG("Failed to add State attribute");
556 if (sess->eap_if->eapReqData &&
557 !radius_msg_add_eap(msg, wpabuf_head(sess->eap_if->eapReqData),
558 wpabuf_len(sess->eap_if->eapReqData))) {
559 RADIUS_DEBUG("Failed to add EAP-Message attribute");
562 if (code == RADIUS_CODE_ACCESS_ACCEPT && sess->eap_if->eapKeyData) {
564 if (sess->eap_if->eapKeyDataLen > 64) {
567 len = sess->eap_if->eapKeyDataLen / 2;
569 if (!radius_msg_add_mppe_keys(msg, hdr->authenticator,
570 (u8 *) client->shared_secret,
571 client->shared_secret_len,
572 sess->eap_if->eapKeyData + len,
573 len, sess->eap_if->eapKeyData,
575 RADIUS_DEBUG("Failed to add MPPE key attributes");
579 if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) {
580 RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)");
581 radius_msg_free(msg);
585 if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret,
586 client->shared_secret_len,
587 hdr->authenticator) < 0) {
588 RADIUS_DEBUG("Failed to add Message-Authenticator attribute");
595 static int radius_server_reject(struct radius_server_data *data,
596 struct radius_client *client,
597 struct radius_msg *request,
598 struct sockaddr *from, socklen_t fromlen,
599 const char *from_addr, int from_port)
601 struct radius_msg *msg;
603 struct eap_hdr eapfail;
605 struct radius_hdr *hdr = radius_msg_get_hdr(request);
607 RADIUS_DEBUG("Reject invalid request from %s:%d",
608 from_addr, from_port);
610 msg = radius_msg_new(RADIUS_CODE_ACCESS_REJECT, hdr->identifier);
615 os_memset(&eapfail, 0, sizeof(eapfail));
616 eapfail.code = EAP_CODE_FAILURE;
617 eapfail.identifier = 0;
618 eapfail.length = host_to_be16(sizeof(eapfail));
620 if (!radius_msg_add_eap(msg, (u8 *) &eapfail, sizeof(eapfail))) {
621 RADIUS_DEBUG("Failed to add EAP-Message attribute");
624 if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) {
625 RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)");
626 radius_msg_free(msg);
630 if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret,
631 client->shared_secret_len,
632 hdr->authenticator) <
634 RADIUS_DEBUG("Failed to add Message-Authenticator attribute");
637 if (wpa_debug_level <= MSG_MSGDUMP) {
638 radius_msg_dump(msg);
641 data->counters.access_rejects++;
642 client->counters.access_rejects++;
643 buf = radius_msg_get_buf(msg);
644 if (sendto(data->auth_sock, wpabuf_head(buf), wpabuf_len(buf), 0,
645 (struct sockaddr *) from, sizeof(*from)) < 0) {
646 perror("sendto[RADIUS SRV]");
650 radius_msg_free(msg);
656 static int radius_server_request(struct radius_server_data *data,
657 struct radius_msg *msg,
658 struct sockaddr *from, socklen_t fromlen,
659 struct radius_client *client,
660 const char *from_addr, int from_port,
661 struct radius_session *force_sess)
665 int res, state_included = 0;
668 struct radius_session *sess;
669 struct radius_msg *reply;
675 res = radius_msg_get_attr(msg, RADIUS_ATTR_STATE, statebuf,
677 state_included = res >= 0;
678 if (res == sizeof(statebuf)) {
679 state = WPA_GET_BE32(statebuf);
680 sess = radius_server_get_session(client, state);
687 RADIUS_DEBUG("Request for session 0x%x", sess->sess_id);
688 } else if (state_included) {
689 RADIUS_DEBUG("State attribute included but no session found");
690 radius_server_reject(data, client, msg, from, fromlen,
691 from_addr, from_port);
694 sess = radius_server_get_new_session(data, client, msg);
696 RADIUS_DEBUG("Could not create a new session");
697 radius_server_reject(data, client, msg, from, fromlen,
698 from_addr, from_port);
703 if (sess->last_from_port == from_port &&
704 sess->last_identifier == radius_msg_get_hdr(msg)->identifier &&
705 os_memcmp(sess->last_authenticator,
706 radius_msg_get_hdr(msg)->authenticator, 16) == 0) {
707 RADIUS_DEBUG("Duplicate message from %s", from_addr);
708 data->counters.dup_access_requests++;
709 client->counters.dup_access_requests++;
711 if (sess->last_reply) {
713 buf = radius_msg_get_buf(sess->last_reply);
714 res = sendto(data->auth_sock, wpabuf_head(buf),
716 (struct sockaddr *) from, fromlen);
718 perror("sendto[RADIUS SRV]");
723 RADIUS_DEBUG("No previous reply available for duplicate "
728 eap = radius_msg_get_eap(msg, &eap_len);
730 RADIUS_DEBUG("No EAP-Message in RADIUS packet from %s",
732 data->counters.packets_dropped++;
733 client->counters.packets_dropped++;
737 RADIUS_DUMP("Received EAP data", eap, eap_len);
739 /* FIX: if Code is Request, Success, or Failure, send Access-Reject;
740 * RFC3579 Sect. 2.6.2.
741 * Include EAP-Response/Nak with no preferred method if
743 * If code is not 1-4, discard the packet silently.
744 * Or is this already done by the EAP state machine? */
746 wpabuf_free(sess->eap_if->eapRespData);
747 sess->eap_if->eapRespData = wpabuf_alloc_ext_data(eap, eap_len);
748 if (sess->eap_if->eapRespData == NULL)
751 sess->eap_if->eapResp = TRUE;
752 eap_server_sm_step(sess->eap);
754 if ((sess->eap_if->eapReq || sess->eap_if->eapSuccess ||
755 sess->eap_if->eapFail) && sess->eap_if->eapReqData) {
756 RADIUS_DUMP("EAP data from the state machine",
757 wpabuf_head(sess->eap_if->eapReqData),
758 wpabuf_len(sess->eap_if->eapReqData));
759 } else if (sess->eap_if->eapFail) {
760 RADIUS_DEBUG("No EAP data from the state machine, but eapFail "
762 } else if (eap_sm_method_pending(sess->eap)) {
763 radius_msg_free(sess->last_msg);
764 sess->last_msg = msg;
765 sess->last_from_port = from_port;
766 os_free(sess->last_from_addr);
767 sess->last_from_addr = os_strdup(from_addr);
768 sess->last_fromlen = fromlen;
769 os_memcpy(&sess->last_from, from, fromlen);
772 RADIUS_DEBUG("No EAP data from the state machine - ignore this"
773 " Access-Request silently (assuming it was a "
775 data->counters.packets_dropped++;
776 client->counters.packets_dropped++;
780 if (sess->eap_if->eapSuccess || sess->eap_if->eapFail)
783 reply = radius_server_encapsulate_eap(data, client, sess, msg);
787 struct radius_hdr *hdr;
789 RADIUS_DEBUG("Reply to %s:%d", from_addr, from_port);
790 if (wpa_debug_level <= MSG_MSGDUMP) {
791 radius_msg_dump(reply);
794 switch (radius_msg_get_hdr(reply)->code) {
795 case RADIUS_CODE_ACCESS_ACCEPT:
796 data->counters.access_accepts++;
797 client->counters.access_accepts++;
799 case RADIUS_CODE_ACCESS_REJECT:
800 data->counters.access_rejects++;
801 client->counters.access_rejects++;
803 case RADIUS_CODE_ACCESS_CHALLENGE:
804 data->counters.access_challenges++;
805 client->counters.access_challenges++;
808 buf = radius_msg_get_buf(reply);
809 res = sendto(data->auth_sock, wpabuf_head(buf),
811 (struct sockaddr *) from, fromlen);
813 perror("sendto[RADIUS SRV]");
815 radius_msg_free(sess->last_reply);
816 sess->last_reply = reply;
817 sess->last_from_port = from_port;
818 hdr = radius_msg_get_hdr(msg);
819 sess->last_identifier = hdr->identifier;
820 os_memcpy(sess->last_authenticator, hdr->authenticator, 16);
822 data->counters.packets_dropped++;
823 client->counters.packets_dropped++;
827 RADIUS_DEBUG("Removing completed session 0x%x after timeout",
829 eloop_cancel_timeout(radius_server_session_remove_timeout,
831 eloop_register_timeout(10, 0,
832 radius_server_session_remove_timeout,
840 static void radius_server_receive_auth(int sock, void *eloop_ctx,
843 struct radius_server_data *data = eloop_ctx;
846 struct sockaddr_storage ss;
847 struct sockaddr_in sin;
849 struct sockaddr_in6 sin6;
850 #endif /* CONFIG_IPV6 */
854 struct radius_client *client = NULL;
855 struct radius_msg *msg = NULL;
859 buf = os_malloc(RADIUS_MAX_MSG_LEN);
864 fromlen = sizeof(from);
865 len = recvfrom(sock, buf, RADIUS_MAX_MSG_LEN, 0,
866 (struct sockaddr *) &from.ss, &fromlen);
868 perror("recvfrom[radius_server]");
874 if (inet_ntop(AF_INET6, &from.sin6.sin6_addr, abuf,
875 sizeof(abuf)) == NULL)
877 from_port = ntohs(from.sin6.sin6_port);
878 RADIUS_DEBUG("Received %d bytes from %s:%d",
879 len, abuf, from_port);
881 client = radius_server_get_client(data,
883 &from.sin6.sin6_addr, 1);
885 #endif /* CONFIG_IPV6 */
888 os_strlcpy(abuf, inet_ntoa(from.sin.sin_addr), sizeof(abuf));
889 from_port = ntohs(from.sin.sin_port);
890 RADIUS_DEBUG("Received %d bytes from %s:%d",
891 len, abuf, from_port);
893 client = radius_server_get_client(data, &from.sin.sin_addr, 0);
896 RADIUS_DUMP("Received data", buf, len);
898 if (client == NULL) {
899 RADIUS_DEBUG("Unknown client %s - packet ignored", abuf);
900 data->counters.invalid_requests++;
904 msg = radius_msg_parse(buf, len);
906 RADIUS_DEBUG("Parsing incoming RADIUS frame failed");
907 data->counters.malformed_access_requests++;
908 client->counters.malformed_access_requests++;
915 if (wpa_debug_level <= MSG_MSGDUMP) {
916 radius_msg_dump(msg);
919 if (radius_msg_get_hdr(msg)->code != RADIUS_CODE_ACCESS_REQUEST) {
920 RADIUS_DEBUG("Unexpected RADIUS code %d",
921 radius_msg_get_hdr(msg)->code);
922 data->counters.unknown_types++;
923 client->counters.unknown_types++;
927 data->counters.access_requests++;
928 client->counters.access_requests++;
930 if (radius_msg_verify_msg_auth(msg, (u8 *) client->shared_secret,
931 client->shared_secret_len, NULL)) {
932 RADIUS_DEBUG("Invalid Message-Authenticator from %s", abuf);
933 data->counters.bad_authenticators++;
934 client->counters.bad_authenticators++;
938 if (radius_server_request(data, msg, (struct sockaddr *) &from,
939 fromlen, client, abuf, from_port, NULL) ==
941 return; /* msg was stored with the session */
944 radius_msg_free(msg);
949 static int radius_server_disable_pmtu_discovery(int s)
952 #if defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DONT)
953 /* Turn off Path MTU discovery on IPv4/UDP sockets. */
954 int action = IP_PMTUDISC_DONT;
955 r = setsockopt(s, IPPROTO_IP, IP_MTU_DISCOVER, &action,
958 wpa_printf(MSG_ERROR, "Failed to set IP_MTU_DISCOVER: "
959 "%s", strerror(errno));
965 static int radius_server_open_socket(int port)
968 struct sockaddr_in addr;
970 s = socket(PF_INET, SOCK_DGRAM, 0);
976 radius_server_disable_pmtu_discovery(s);
978 os_memset(&addr, 0, sizeof(addr));
979 addr.sin_family = AF_INET;
980 addr.sin_port = htons(port);
981 if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
992 static int radius_server_open_socket6(int port)
995 struct sockaddr_in6 addr;
997 s = socket(PF_INET6, SOCK_DGRAM, 0);
999 perror("socket[IPv6]");
1003 os_memset(&addr, 0, sizeof(addr));
1004 addr.sin6_family = AF_INET6;
1005 os_memcpy(&addr.sin6_addr, &in6addr_any, sizeof(in6addr_any));
1006 addr.sin6_port = htons(port);
1007 if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
1015 #endif /* CONFIG_IPV6 */
1018 static void radius_server_free_sessions(struct radius_server_data *data,
1019 struct radius_session *sessions)
1021 struct radius_session *session, *prev;
1026 session = session->next;
1027 radius_server_session_free(data, prev);
1032 static void radius_server_free_clients(struct radius_server_data *data,
1033 struct radius_client *clients)
1035 struct radius_client *client, *prev;
1040 client = client->next;
1042 radius_server_free_sessions(data, prev->sessions);
1043 os_free(prev->shared_secret);
1049 static struct radius_client *
1050 radius_server_read_clients(const char *client_file, int ipv6)
1053 const int buf_size = 1024;
1055 struct radius_client *clients, *tail, *entry;
1056 int line = 0, mask, failed = 0, i;
1057 struct in_addr addr;
1059 struct in6_addr addr6;
1060 #endif /* CONFIG_IPV6 */
1063 f = fopen(client_file, "r");
1065 RADIUS_ERROR("Could not open client file '%s'", client_file);
1069 buf = os_malloc(buf_size);
1075 clients = tail = NULL;
1076 while (fgets(buf, buf_size, f)) {
1077 /* Configuration file format:
1078 * 192.168.1.0/24 secret
1079 * 192.168.1.2 secret
1080 * fe80::211:22ff:fe33:4455/64 secretipv6
1083 buf[buf_size - 1] = '\0';
1085 while (*pos != '\0' && *pos != '\n')
1089 if (*buf == '\0' || *buf == '#')
1093 while ((*pos >= '0' && *pos <= '9') || *pos == '.' ||
1094 (*pos >= 'a' && *pos <= 'f') || *pos == ':' ||
1095 (*pos >= 'A' && *pos <= 'F')) {
1107 mask = strtol(pos, &end, 10);
1109 (mask < 0 || mask > (ipv6 ? 128 : 32))) {
1115 mask = ipv6 ? 128 : 32;
1119 if (!ipv6 && inet_aton(buf, &addr) == 0) {
1124 if (ipv6 && inet_pton(AF_INET6, buf, &addr6) <= 0) {
1125 if (inet_pton(AF_INET, buf, &addr) <= 0) {
1129 /* Convert IPv4 address to IPv6 */
1132 os_memset(addr6.s6_addr, 0, 10);
1133 addr6.s6_addr[10] = 0xff;
1134 addr6.s6_addr[11] = 0xff;
1135 os_memcpy(addr6.s6_addr + 12, (char *) &addr.s_addr,
1138 #endif /* CONFIG_IPV6 */
1140 while (*pos == ' ' || *pos == '\t') {
1149 entry = os_zalloc(sizeof(*entry));
1150 if (entry == NULL) {
1154 entry->shared_secret = os_strdup(pos);
1155 if (entry->shared_secret == NULL) {
1160 entry->shared_secret_len = os_strlen(entry->shared_secret);
1161 entry->addr.s_addr = addr.s_addr;
1164 for (i = 0; i < mask; i++)
1165 val |= 1 << (31 - i);
1166 entry->mask.s_addr = htonl(val);
1170 int offset = mask / 8;
1172 os_memcpy(entry->addr6.s6_addr, addr6.s6_addr, 16);
1173 os_memset(entry->mask6.s6_addr, 0xff, offset);
1175 for (i = 0; i < (mask % 8); i++)
1176 val |= 1 << (7 - i);
1178 entry->mask6.s6_addr[offset] = val;
1180 #endif /* CONFIG_IPV6 */
1183 clients = tail = entry;
1191 RADIUS_ERROR("Invalid line %d in '%s'", line, client_file);
1192 radius_server_free_clients(NULL, clients);
1204 * radius_server_init - Initialize RADIUS server
1205 * @conf: Configuration for the RADIUS server
1206 * Returns: Pointer to private RADIUS server context or %NULL on failure
1208 * This initializes a RADIUS server instance and returns a context pointer that
1209 * will be used in other calls to the RADIUS server module. The server can be
1210 * deinitialize by calling radius_server_deinit().
1212 struct radius_server_data *
1213 radius_server_init(struct radius_server_conf *conf)
1215 struct radius_server_data *data;
1219 fprintf(stderr, "RADIUS server compiled without IPv6 "
1223 #endif /* CONFIG_IPV6 */
1225 data = os_zalloc(sizeof(*data));
1229 os_get_time(&data->start_time);
1230 data->conf_ctx = conf->conf_ctx;
1231 data->eap_sim_db_priv = conf->eap_sim_db_priv;
1232 data->ssl_ctx = conf->ssl_ctx;
1233 data->ipv6 = conf->ipv6;
1234 if (conf->pac_opaque_encr_key) {
1235 data->pac_opaque_encr_key = os_malloc(16);
1236 os_memcpy(data->pac_opaque_encr_key, conf->pac_opaque_encr_key,
1239 if (conf->eap_fast_a_id) {
1240 data->eap_fast_a_id = os_malloc(conf->eap_fast_a_id_len);
1241 if (data->eap_fast_a_id) {
1242 os_memcpy(data->eap_fast_a_id, conf->eap_fast_a_id,
1243 conf->eap_fast_a_id_len);
1244 data->eap_fast_a_id_len = conf->eap_fast_a_id_len;
1247 if (conf->eap_fast_a_id_info)
1248 data->eap_fast_a_id_info = os_strdup(conf->eap_fast_a_id_info);
1249 data->eap_fast_prov = conf->eap_fast_prov;
1250 data->pac_key_lifetime = conf->pac_key_lifetime;
1251 data->pac_key_refresh_time = conf->pac_key_refresh_time;
1252 data->get_eap_user = conf->get_eap_user;
1253 data->eap_sim_aka_result_ind = conf->eap_sim_aka_result_ind;
1254 data->tnc = conf->tnc;
1255 data->wps = conf->wps;
1256 if (conf->eap_req_id_text) {
1257 data->eap_req_id_text = os_malloc(conf->eap_req_id_text_len);
1258 if (data->eap_req_id_text) {
1259 os_memcpy(data->eap_req_id_text, conf->eap_req_id_text,
1260 conf->eap_req_id_text_len);
1261 data->eap_req_id_text_len = conf->eap_req_id_text_len;
1265 data->clients = radius_server_read_clients(conf->client_file,
1267 if (data->clients == NULL) {
1268 printf("No RADIUS clients configured.\n");
1269 radius_server_deinit(data);
1275 data->auth_sock = radius_server_open_socket6(conf->auth_port);
1277 #endif /* CONFIG_IPV6 */
1278 data->auth_sock = radius_server_open_socket(conf->auth_port);
1279 if (data->auth_sock < 0) {
1280 printf("Failed to open UDP socket for RADIUS authentication "
1282 radius_server_deinit(data);
1285 if (eloop_register_read_sock(data->auth_sock,
1286 radius_server_receive_auth,
1288 radius_server_deinit(data);
1297 * radius_server_deinit - Deinitialize RADIUS server
1298 * @data: RADIUS server context from radius_server_init()
1300 void radius_server_deinit(struct radius_server_data *data)
1305 if (data->auth_sock >= 0) {
1306 eloop_unregister_read_sock(data->auth_sock);
1307 close(data->auth_sock);
1310 radius_server_free_clients(data, data->clients);
1312 os_free(data->pac_opaque_encr_key);
1313 os_free(data->eap_fast_a_id);
1314 os_free(data->eap_fast_a_id_info);
1315 os_free(data->eap_req_id_text);
1321 * radius_server_get_mib - Get RADIUS server MIB information
1322 * @data: RADIUS server context from radius_server_init()
1323 * @buf: Buffer for returning the MIB data in text format
1324 * @buflen: buf length in octets
1325 * Returns: Number of octets written into buf
1327 int radius_server_get_mib(struct radius_server_data *data, char *buf,
1334 struct radius_client *cli;
1336 /* RFC 2619 - RADIUS Authentication Server MIB */
1338 if (data == NULL || buflen == 0)
1345 uptime = (now.sec - data->start_time.sec) * 100 +
1346 ((now.usec - data->start_time.usec) / 10000) % 100;
1347 ret = os_snprintf(pos, end - pos,
1348 "RADIUS-AUTH-SERVER-MIB\n"
1349 "radiusAuthServIdent=hostapd\n"
1350 "radiusAuthServUpTime=%d\n"
1351 "radiusAuthServResetTime=0\n"
1352 "radiusAuthServConfigReset=4\n",
1354 if (ret < 0 || ret >= end - pos) {
1360 ret = os_snprintf(pos, end - pos,
1361 "radiusAuthServTotalAccessRequests=%u\n"
1362 "radiusAuthServTotalInvalidRequests=%u\n"
1363 "radiusAuthServTotalDupAccessRequests=%u\n"
1364 "radiusAuthServTotalAccessAccepts=%u\n"
1365 "radiusAuthServTotalAccessRejects=%u\n"
1366 "radiusAuthServTotalAccessChallenges=%u\n"
1367 "radiusAuthServTotalMalformedAccessRequests=%u\n"
1368 "radiusAuthServTotalBadAuthenticators=%u\n"
1369 "radiusAuthServTotalPacketsDropped=%u\n"
1370 "radiusAuthServTotalUnknownTypes=%u\n",
1371 data->counters.access_requests,
1372 data->counters.invalid_requests,
1373 data->counters.dup_access_requests,
1374 data->counters.access_accepts,
1375 data->counters.access_rejects,
1376 data->counters.access_challenges,
1377 data->counters.malformed_access_requests,
1378 data->counters.bad_authenticators,
1379 data->counters.packets_dropped,
1380 data->counters.unknown_types);
1381 if (ret < 0 || ret >= end - pos) {
1387 for (cli = data->clients, idx = 0; cli; cli = cli->next, idx++) {
1388 char abuf[50], mbuf[50];
1391 if (inet_ntop(AF_INET6, &cli->addr6, abuf,
1392 sizeof(abuf)) == NULL)
1394 if (inet_ntop(AF_INET6, &cli->mask6, abuf,
1395 sizeof(mbuf)) == NULL)
1398 #endif /* CONFIG_IPV6 */
1400 os_strlcpy(abuf, inet_ntoa(cli->addr), sizeof(abuf));
1401 os_strlcpy(mbuf, inet_ntoa(cli->mask), sizeof(mbuf));
1404 ret = os_snprintf(pos, end - pos,
1405 "radiusAuthClientIndex=%u\n"
1406 "radiusAuthClientAddress=%s/%s\n"
1407 "radiusAuthServAccessRequests=%u\n"
1408 "radiusAuthServDupAccessRequests=%u\n"
1409 "radiusAuthServAccessAccepts=%u\n"
1410 "radiusAuthServAccessRejects=%u\n"
1411 "radiusAuthServAccessChallenges=%u\n"
1412 "radiusAuthServMalformedAccessRequests=%u\n"
1413 "radiusAuthServBadAuthenticators=%u\n"
1414 "radiusAuthServPacketsDropped=%u\n"
1415 "radiusAuthServUnknownTypes=%u\n",
1418 cli->counters.access_requests,
1419 cli->counters.dup_access_requests,
1420 cli->counters.access_accepts,
1421 cli->counters.access_rejects,
1422 cli->counters.access_challenges,
1423 cli->counters.malformed_access_requests,
1424 cli->counters.bad_authenticators,
1425 cli->counters.packets_dropped,
1426 cli->counters.unknown_types);
1427 if (ret < 0 || ret >= end - pos) {
1438 static int radius_server_get_eap_user(void *ctx, const u8 *identity,
1439 size_t identity_len, int phase2,
1440 struct eap_user *user)
1442 struct radius_session *sess = ctx;
1443 struct radius_server_data *data = sess->server;
1445 return data->get_eap_user(data->conf_ctx, identity, identity_len,
1450 static const char * radius_server_get_eap_req_id_text(void *ctx, size_t *len)
1452 struct radius_session *sess = ctx;
1453 struct radius_server_data *data = sess->server;
1454 *len = data->eap_req_id_text_len;
1455 return data->eap_req_id_text;
1459 static struct eapol_callbacks radius_server_eapol_cb =
1461 .get_eap_user = radius_server_get_eap_user,
1462 .get_eap_req_id_text = radius_server_get_eap_req_id_text,
1467 * radius_server_eap_pending_cb - Pending EAP data notification
1468 * @data: RADIUS server context from radius_server_init()
1469 * @ctx: Pending EAP context pointer
1471 * This function is used to notify EAP server module that a pending operation
1472 * has been completed and processing of the EAP session can proceed.
1474 void radius_server_eap_pending_cb(struct radius_server_data *data, void *ctx)
1476 struct radius_client *cli;
1477 struct radius_session *s, *sess = NULL;
1478 struct radius_msg *msg;
1483 for (cli = data->clients; cli; cli = cli->next) {
1484 for (s = cli->sessions; s; s = s->next) {
1485 if (s->eap == ctx && s->last_msg) {
1497 RADIUS_DEBUG("No session matched callback ctx");
1501 msg = sess->last_msg;
1502 sess->last_msg = NULL;
1503 eap_sm_pending_cb(sess->eap);
1504 if (radius_server_request(data, msg,
1505 (struct sockaddr *) &sess->last_from,
1506 sess->last_fromlen, cli,
1507 sess->last_from_addr,
1508 sess->last_from_port, sess) == -2)
1509 return; /* msg was stored with the session */
1511 radius_msg_free(msg);